LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 4056 5739 70.7 %
Date: 2024-11-20 13:49:38 Functions: 364 473 77.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : #include "spdk/stdinc.h"
       8             : 
       9             : #include "spdk/bdev.h"
      10             : 
      11             : #include "spdk/accel.h"
      12             : #include "spdk/config.h"
      13             : #include "spdk/env.h"
      14             : #include "spdk/thread.h"
      15             : #include "spdk/likely.h"
      16             : #include "spdk/queue.h"
      17             : #include "spdk/nvme_spec.h"
      18             : #include "spdk/scsi_spec.h"
      19             : #include "spdk/notify.h"
      20             : #include "spdk/util.h"
      21             : #include "spdk/trace.h"
      22             : #include "spdk/dma.h"
      23             : 
      24             : #include "spdk/bdev_module.h"
      25             : #include "spdk/log.h"
      26             : #include "spdk/string.h"
      27             : 
      28             : #include "bdev_internal.h"
      29             : #include "spdk_internal/trace_defs.h"
      30             : #include "spdk_internal/assert.h"
      31             : 
      32             : #ifdef SPDK_CONFIG_VTUNE
      33             : #include "ittnotify.h"
      34             : #include "ittnotify_types.h"
      35             : int __itt_init_ittlib(const char *, __itt_group_id);
      36             : #endif
      37             : 
      38             : #define SPDK_BDEV_IO_POOL_SIZE                  (64 * 1024 - 1)
      39             : #define SPDK_BDEV_IO_CACHE_SIZE                 256
      40             : #define SPDK_BDEV_AUTO_EXAMINE                  true
      41             : #define BUF_SMALL_CACHE_SIZE                    128
      42             : #define BUF_LARGE_CACHE_SIZE                    16
      43             : #define NOMEM_THRESHOLD_COUNT                   8
      44             : 
      45             : #define SPDK_BDEV_QOS_TIMESLICE_IN_USEC         1000
      46             : #define SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE      1
      47             : #define SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE    512
      48             : #define SPDK_BDEV_QOS_MIN_IOS_PER_SEC           1000
      49             : #define SPDK_BDEV_QOS_MIN_BYTES_PER_SEC         (1024 * 1024)
      50             : #define SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC        (UINT64_MAX / (1024 * 1024))
      51             : #define SPDK_BDEV_QOS_LIMIT_NOT_DEFINED         UINT64_MAX
      52             : #define SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC      1000
      53             : 
      54             : /* The maximum number of children requests for a UNMAP or WRITE ZEROES command
      55             :  * when splitting into children requests at a time.
      56             :  */
      57             : #define SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS (8)
      58             : #define BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD 1000000
      59             : 
      60             : /* The maximum number of children requests for a COPY command
      61             :  * when splitting into children requests at a time.
      62             :  */
      63             : #define SPDK_BDEV_MAX_CHILDREN_COPY_REQS (8)
      64             : 
      65             : #define LOG_ALREADY_CLAIMED_ERROR(detail, bdev) \
      66             :         log_already_claimed(SPDK_LOG_ERROR, __LINE__, __func__, detail, bdev)
      67             : #ifdef DEBUG
      68             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) \
      69             :         log_already_claimed(SPDK_LOG_DEBUG, __LINE__, __func__, detail, bdev)
      70             : #else
      71             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) do {} while(0)
      72             : #endif
      73             : 
      74             : static void log_already_claimed(enum spdk_log_level level, const int line, const char *func,
      75             :                                 const char *detail, struct spdk_bdev *bdev);
      76             : 
      77             : static const char *qos_rpc_type[] = {"rw_ios_per_sec",
      78             :                                      "rw_mbytes_per_sec", "r_mbytes_per_sec", "w_mbytes_per_sec"
      79             :                                     };
      80             : 
      81             : TAILQ_HEAD(spdk_bdev_list, spdk_bdev);
      82             : 
      83             : RB_HEAD(bdev_name_tree, spdk_bdev_name);
      84             : 
      85             : static int
      86         569 : bdev_name_cmp(struct spdk_bdev_name *name1, struct spdk_bdev_name *name2)
      87             : {
      88         569 :         return strcmp(name1->name, name2->name);
      89             : }
      90             : 
      91        2129 : RB_GENERATE_STATIC(bdev_name_tree, spdk_bdev_name, node, bdev_name_cmp);
      92             : 
      93             : struct spdk_bdev_mgr {
      94             :         struct spdk_mempool *bdev_io_pool;
      95             : 
      96             :         void *zero_buffer;
      97             : 
      98             :         TAILQ_HEAD(bdev_module_list, spdk_bdev_module) bdev_modules;
      99             : 
     100             :         struct spdk_bdev_list bdevs;
     101             :         struct bdev_name_tree bdev_names;
     102             : 
     103             :         bool init_complete;
     104             :         bool module_init_complete;
     105             : 
     106             :         struct spdk_spinlock spinlock;
     107             : 
     108             :         TAILQ_HEAD(, spdk_bdev_open_async_ctx) async_bdev_opens;
     109             : 
     110             : #ifdef SPDK_CONFIG_VTUNE
     111             :         __itt_domain    *domain;
     112             : #endif
     113             : };
     114             : 
     115             : static struct spdk_bdev_mgr g_bdev_mgr = {
     116             :         .bdev_modules = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdev_modules),
     117             :         .bdevs = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdevs),
     118             :         .bdev_names = RB_INITIALIZER(g_bdev_mgr.bdev_names),
     119             :         .init_complete = false,
     120             :         .module_init_complete = false,
     121             :         .async_bdev_opens = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.async_bdev_opens),
     122             : };
     123             : 
     124             : static void
     125             : __attribute__((constructor))
     126           3 : _bdev_init(void)
     127             : {
     128           3 :         spdk_spin_init(&g_bdev_mgr.spinlock);
     129           3 : }
     130             : 
     131             : typedef void (*lock_range_cb)(struct lba_range *range, void *ctx, int status);
     132             : 
     133             : typedef void (*bdev_copy_bounce_buffer_cpl)(void *ctx, int rc);
     134             : 
     135             : struct lba_range {
     136             :         struct spdk_bdev                *bdev;
     137             :         uint64_t                        offset;
     138             :         uint64_t                        length;
     139             :         bool                            quiesce;
     140             :         void                            *locked_ctx;
     141             :         struct spdk_thread              *owner_thread;
     142             :         struct spdk_bdev_channel        *owner_ch;
     143             :         TAILQ_ENTRY(lba_range)          tailq;
     144             :         TAILQ_ENTRY(lba_range)          tailq_module;
     145             : };
     146             : 
     147             : static struct spdk_bdev_opts    g_bdev_opts = {
     148             :         .bdev_io_pool_size = SPDK_BDEV_IO_POOL_SIZE,
     149             :         .bdev_io_cache_size = SPDK_BDEV_IO_CACHE_SIZE,
     150             :         .bdev_auto_examine = SPDK_BDEV_AUTO_EXAMINE,
     151             :         .iobuf_small_cache_size = BUF_SMALL_CACHE_SIZE,
     152             :         .iobuf_large_cache_size = BUF_LARGE_CACHE_SIZE,
     153             : };
     154             : 
     155             : static spdk_bdev_init_cb        g_init_cb_fn = NULL;
     156             : static void                     *g_init_cb_arg = NULL;
     157             : 
     158             : static spdk_bdev_fini_cb        g_fini_cb_fn = NULL;
     159             : static void                     *g_fini_cb_arg = NULL;
     160             : static struct spdk_thread       *g_fini_thread = NULL;
     161             : 
     162             : struct spdk_bdev_qos_limit {
     163             :         /** IOs or bytes allowed per second (i.e., 1s). */
     164             :         uint64_t limit;
     165             : 
     166             :         /** Remaining IOs or bytes allowed in current timeslice (e.g., 1ms).
     167             :          *  For remaining bytes, allowed to run negative if an I/O is submitted when
     168             :          *  some bytes are remaining, but the I/O is bigger than that amount. The
     169             :          *  excess will be deducted from the next timeslice.
     170             :          */
     171             :         int64_t remaining_this_timeslice;
     172             : 
     173             :         /** Minimum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     174             :         uint32_t min_per_timeslice;
     175             : 
     176             :         /** Maximum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     177             :         uint32_t max_per_timeslice;
     178             : 
     179             :         /** Function to check whether to queue the IO.
     180             :          * If The IO is allowed to pass, the quota will be reduced correspondingly.
     181             :          */
     182             :         bool (*queue_io)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     183             : 
     184             :         /** Function to rewind the quota once the IO was allowed to be sent by this
     185             :          * limit but queued due to one of the further limits.
     186             :          */
     187             :         void (*rewind_quota)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     188             : };
     189             : 
     190             : struct spdk_bdev_qos {
     191             :         /** Types of structure of rate limits. */
     192             :         struct spdk_bdev_qos_limit rate_limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
     193             : 
     194             :         /** The channel that all I/O are funneled through. */
     195             :         struct spdk_bdev_channel *ch;
     196             : 
     197             :         /** The thread on which the poller is running. */
     198             :         struct spdk_thread *thread;
     199             : 
     200             :         /** Size of a timeslice in tsc ticks. */
     201             :         uint64_t timeslice_size;
     202             : 
     203             :         /** Timestamp of start of last timeslice. */
     204             :         uint64_t last_timeslice;
     205             : 
     206             :         /** Poller that processes queued I/O commands each time slice. */
     207             :         struct spdk_poller *poller;
     208             : };
     209             : 
     210             : struct spdk_bdev_mgmt_channel {
     211             :         /*
     212             :          * Each thread keeps a cache of bdev_io - this allows
     213             :          *  bdev threads which are *not* DPDK threads to still
     214             :          *  benefit from a per-thread bdev_io cache.  Without
     215             :          *  this, non-DPDK threads fetching from the mempool
     216             :          *  incur a cmpxchg on get and put.
     217             :          */
     218             :         bdev_io_stailq_t per_thread_cache;
     219             :         uint32_t        per_thread_cache_count;
     220             :         uint32_t        bdev_io_cache_size;
     221             : 
     222             :         struct spdk_iobuf_channel iobuf;
     223             : 
     224             :         TAILQ_HEAD(, spdk_bdev_shared_resource) shared_resources;
     225             :         TAILQ_HEAD(, spdk_bdev_io_wait_entry)   io_wait_queue;
     226             : };
     227             : 
     228             : /*
     229             :  * Per-module (or per-io_device) data. Multiple bdevs built on the same io_device
     230             :  * will queue here their IO that awaits retry. It makes it possible to retry sending
     231             :  * IO to one bdev after IO from other bdev completes.
     232             :  */
     233             : struct spdk_bdev_shared_resource {
     234             :         /* The bdev management channel */
     235             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
     236             : 
     237             :         /*
     238             :          * Count of I/O submitted to bdev module and waiting for completion.
     239             :          * Incremented before submit_request() is called on an spdk_bdev_io.
     240             :          */
     241             :         uint64_t                io_outstanding;
     242             : 
     243             :         /*
     244             :          * Queue of IO awaiting retry because of a previous NOMEM status returned
     245             :          *  on this channel.
     246             :          */
     247             :         bdev_io_tailq_t         nomem_io;
     248             : 
     249             :         /*
     250             :          * Threshold which io_outstanding must drop to before retrying nomem_io.
     251             :          */
     252             :         uint64_t                nomem_threshold;
     253             : 
     254             :         /* I/O channel allocated by a bdev module */
     255             :         struct spdk_io_channel  *shared_ch;
     256             : 
     257             :         struct spdk_poller      *nomem_poller;
     258             : 
     259             :         /* Refcount of bdev channels using this resource */
     260             :         uint32_t                ref;
     261             : 
     262             :         TAILQ_ENTRY(spdk_bdev_shared_resource) link;
     263             : };
     264             : 
     265             : #define BDEV_CH_RESET_IN_PROGRESS       (1 << 0)
     266             : #define BDEV_CH_QOS_ENABLED             (1 << 1)
     267             : 
     268             : struct spdk_bdev_channel {
     269             :         struct spdk_bdev        *bdev;
     270             : 
     271             :         /* The channel for the underlying device */
     272             :         struct spdk_io_channel  *channel;
     273             : 
     274             :         /* Accel channel */
     275             :         struct spdk_io_channel  *accel_channel;
     276             : 
     277             :         /* Per io_device per thread data */
     278             :         struct spdk_bdev_shared_resource *shared_resource;
     279             : 
     280             :         struct spdk_bdev_io_stat *stat;
     281             : 
     282             :         /*
     283             :          * Count of I/O submitted to the underlying dev module through this channel
     284             :          * and waiting for completion.
     285             :          */
     286             :         uint64_t                io_outstanding;
     287             : 
     288             :         /*
     289             :          * List of all submitted I/Os including I/O that are generated via splitting.
     290             :          */
     291             :         bdev_io_tailq_t         io_submitted;
     292             : 
     293             :         /*
     294             :          * List of spdk_bdev_io that are currently queued because they write to a locked
     295             :          * LBA range.
     296             :          */
     297             :         bdev_io_tailq_t         io_locked;
     298             : 
     299             :         /* List of I/Os with accel sequence being currently executed */
     300             :         bdev_io_tailq_t         io_accel_exec;
     301             : 
     302             :         /* List of I/Os doing memory domain pull/push */
     303             :         bdev_io_tailq_t         io_memory_domain;
     304             : 
     305             :         uint32_t                flags;
     306             : 
     307             :         /* Counts number of bdev_io in the io_submitted TAILQ */
     308             :         uint16_t                queue_depth;
     309             : 
     310             :         uint16_t                trace_id;
     311             : 
     312             :         struct spdk_histogram_data *histogram;
     313             : 
     314             : #ifdef SPDK_CONFIG_VTUNE
     315             :         uint64_t                start_tsc;
     316             :         uint64_t                interval_tsc;
     317             :         __itt_string_handle     *handle;
     318             :         struct spdk_bdev_io_stat *prev_stat;
     319             : #endif
     320             : 
     321             :         lba_range_tailq_t       locked_ranges;
     322             : 
     323             :         /** List of I/Os queued by QoS. */
     324             :         bdev_io_tailq_t         qos_queued_io;
     325             : };
     326             : 
     327             : struct media_event_entry {
     328             :         struct spdk_bdev_media_event    event;
     329             :         TAILQ_ENTRY(media_event_entry)  tailq;
     330             : };
     331             : 
     332             : #define MEDIA_EVENT_POOL_SIZE 64
     333             : 
     334             : struct spdk_bdev_desc {
     335             :         struct spdk_bdev                *bdev;
     336             :         bool                            write;
     337             :         bool                            memory_domains_supported;
     338             :         bool                            accel_sequence_supported[SPDK_BDEV_NUM_IO_TYPES];
     339             :         struct spdk_bdev_open_opts      opts;
     340             :         struct spdk_thread              *thread;
     341             :         struct {
     342             :                 spdk_bdev_event_cb_t event_fn;
     343             :                 void *ctx;
     344             :         }                               callback;
     345             :         bool                            closed;
     346             :         struct spdk_spinlock            spinlock;
     347             :         uint32_t                        refs;
     348             :         TAILQ_HEAD(, media_event_entry) pending_media_events;
     349             :         TAILQ_HEAD(, media_event_entry) free_media_events;
     350             :         struct media_event_entry        *media_events_buffer;
     351             :         TAILQ_ENTRY(spdk_bdev_desc)     link;
     352             : 
     353             :         uint64_t                timeout_in_sec;
     354             :         spdk_bdev_io_timeout_cb cb_fn;
     355             :         void                    *cb_arg;
     356             :         struct spdk_poller      *io_timeout_poller;
     357             :         struct spdk_bdev_module_claim   *claim;
     358             : };
     359             : 
     360             : struct spdk_bdev_iostat_ctx {
     361             :         struct spdk_bdev_io_stat *stat;
     362             :         enum spdk_bdev_reset_stat_mode reset_mode;
     363             :         spdk_bdev_get_device_stat_cb cb;
     364             :         void *cb_arg;
     365             : };
     366             : 
     367             : struct set_qos_limit_ctx {
     368             :         void (*cb_fn)(void *cb_arg, int status);
     369             :         void *cb_arg;
     370             :         struct spdk_bdev *bdev;
     371             : };
     372             : 
     373             : struct spdk_bdev_channel_iter {
     374             :         spdk_bdev_for_each_channel_msg fn;
     375             :         spdk_bdev_for_each_channel_done cpl;
     376             :         struct spdk_io_channel_iter *i;
     377             :         void *ctx;
     378             : };
     379             : 
     380             : struct spdk_bdev_io_error_stat {
     381             :         uint32_t error_status[-SPDK_MIN_BDEV_IO_STATUS];
     382             : };
     383             : 
     384             : enum bdev_io_retry_state {
     385             :         BDEV_IO_RETRY_STATE_INVALID,
     386             :         BDEV_IO_RETRY_STATE_PULL,
     387             :         BDEV_IO_RETRY_STATE_PULL_MD,
     388             :         BDEV_IO_RETRY_STATE_SUBMIT,
     389             :         BDEV_IO_RETRY_STATE_PUSH,
     390             :         BDEV_IO_RETRY_STATE_PUSH_MD,
     391             :         BDEV_IO_RETRY_STATE_GET_ACCEL_BUF,
     392             : };
     393             : 
     394             : #define __bdev_to_io_dev(bdev)          (((char *)bdev) + 1)
     395             : #define __bdev_from_io_dev(io_dev)      ((struct spdk_bdev *)(((char *)io_dev) - 1))
     396             : #define __io_ch_to_bdev_ch(io_ch)       ((struct spdk_bdev_channel *)spdk_io_channel_get_ctx(io_ch))
     397             : #define __io_ch_to_bdev_mgmt_ch(io_ch)  ((struct spdk_bdev_mgmt_channel *)spdk_io_channel_get_ctx(io_ch))
     398             : 
     399             : static inline void bdev_io_complete(void *ctx);
     400             : static inline void bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io);
     401             : static void bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io);
     402             : static void bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io);
     403             : static void _bdev_io_get_accel_buf(struct spdk_bdev_io *bdev_io);
     404             : 
     405             : static void bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
     406             : static int bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io);
     407             : 
     408             : static void bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
     409             :                                 struct spdk_io_channel *ch, void *_ctx);
     410             : static void bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status);
     411             : 
     412             : static int bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     413             :                                      struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
     414             :                                      uint64_t num_blocks,
     415             :                                      struct spdk_memory_domain *domain, void *domain_ctx,
     416             :                                      struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     417             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg);
     418             : static int bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     419             :                                       struct iovec *iov, int iovcnt, void *md_buf,
     420             :                                       uint64_t offset_blocks, uint64_t num_blocks,
     421             :                                       struct spdk_memory_domain *domain, void *domain_ctx,
     422             :                                       struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     423             :                                       uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
     424             :                                       spdk_bdev_io_completion_cb cb, void *cb_arg);
     425             : 
     426             : static int bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     427             :                                uint64_t offset, uint64_t length,
     428             :                                lock_range_cb cb_fn, void *cb_arg);
     429             : 
     430             : static int bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     431             :                                  uint64_t offset, uint64_t length,
     432             :                                  lock_range_cb cb_fn, void *cb_arg);
     433             : 
     434             : static bool bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort);
     435             : static bool bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *ch, struct spdk_bdev_io *bio_to_abort);
     436             : 
     437             : static bool claim_type_is_v2(enum spdk_bdev_claim_type type);
     438             : static void bdev_desc_release_claims(struct spdk_bdev_desc *desc);
     439             : static void claim_reset(struct spdk_bdev *bdev);
     440             : 
     441             : static void bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch);
     442             : 
     443             : static bool bdev_io_should_split(struct spdk_bdev_io *bdev_io);
     444             : 
     445             : #define bdev_get_ext_io_opt(opts, field, defval) \
     446             :         ((opts) != NULL ? SPDK_GET_FIELD(opts, field, defval) : (defval))
     447             : 
     448             : static inline void
     449         671 : bdev_ch_add_to_io_submitted(struct spdk_bdev_io *bdev_io)
     450             : {
     451         671 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     452         671 :         bdev_io->internal.ch->queue_depth++;
     453         671 : }
     454             : 
     455             : static inline void
     456         671 : bdev_ch_remove_from_io_submitted(struct spdk_bdev_io *bdev_io)
     457             : {
     458         671 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     459         671 :         bdev_io->internal.ch->queue_depth--;
     460         671 : }
     461             : 
     462             : void
     463          16 : spdk_bdev_get_opts(struct spdk_bdev_opts *opts, size_t opts_size)
     464             : {
     465          16 :         if (!opts) {
     466           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     467           0 :                 return;
     468             :         }
     469             : 
     470          16 :         if (!opts_size) {
     471           0 :                 SPDK_ERRLOG("opts_size should not be zero value\n");
     472           0 :                 return;
     473             :         }
     474             : 
     475          16 :         opts->opts_size = opts_size;
     476             : 
     477             : #define SET_FIELD(field) \
     478             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts_size) { \
     479             :                 opts->field = g_bdev_opts.field; \
     480             :         } \
     481             : 
     482          16 :         SET_FIELD(bdev_io_pool_size);
     483          16 :         SET_FIELD(bdev_io_cache_size);
     484          16 :         SET_FIELD(bdev_auto_examine);
     485          16 :         SET_FIELD(iobuf_small_cache_size);
     486          16 :         SET_FIELD(iobuf_large_cache_size);
     487             : 
     488             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     489             :          * and do not forget to add the SET_FIELD statement for your added field. */
     490             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_opts) == 32, "Incorrect size");
     491             : 
     492             : #undef SET_FIELD
     493          16 : }
     494             : 
     495             : int
     496          17 : spdk_bdev_set_opts(struct spdk_bdev_opts *opts)
     497             : {
     498             :         uint32_t min_pool_size;
     499             : 
     500          17 :         if (!opts) {
     501           0 :                 SPDK_ERRLOG("opts cannot be NULL\n");
     502           0 :                 return -1;
     503             :         }
     504             : 
     505          17 :         if (!opts->opts_size) {
     506           1 :                 SPDK_ERRLOG("opts_size inside opts cannot be zero value\n");
     507           1 :                 return -1;
     508             :         }
     509             : 
     510             :         /*
     511             :          * Add 1 to the thread count to account for the extra mgmt_ch that gets created during subsystem
     512             :          *  initialization.  A second mgmt_ch will be created on the same thread when the application starts
     513             :          *  but before the deferred put_io_channel event is executed for the first mgmt_ch.
     514             :          */
     515          16 :         min_pool_size = opts->bdev_io_cache_size * (spdk_thread_get_count() + 1);
     516          16 :         if (opts->bdev_io_pool_size < min_pool_size) {
     517           0 :                 SPDK_ERRLOG("bdev_io_pool_size %" PRIu32 " is not compatible with bdev_io_cache_size %" PRIu32
     518             :                             " and %" PRIu32 " threads\n", opts->bdev_io_pool_size, opts->bdev_io_cache_size,
     519             :                             spdk_thread_get_count());
     520           0 :                 SPDK_ERRLOG("bdev_io_pool_size must be at least %" PRIu32 "\n", min_pool_size);
     521           0 :                 return -1;
     522             :         }
     523             : 
     524             : #define SET_FIELD(field) \
     525             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts->opts_size) { \
     526             :                 g_bdev_opts.field = opts->field; \
     527             :         } \
     528             : 
     529          16 :         SET_FIELD(bdev_io_pool_size);
     530          16 :         SET_FIELD(bdev_io_cache_size);
     531          16 :         SET_FIELD(bdev_auto_examine);
     532          16 :         SET_FIELD(iobuf_small_cache_size);
     533          16 :         SET_FIELD(iobuf_large_cache_size);
     534             : 
     535          16 :         g_bdev_opts.opts_size = opts->opts_size;
     536             : 
     537             : #undef SET_FIELD
     538             : 
     539          16 :         return 0;
     540          17 : }
     541             : 
     542             : static struct spdk_bdev *
     543         155 : bdev_get_by_name(const char *bdev_name)
     544             : {
     545             :         struct spdk_bdev_name find;
     546             :         struct spdk_bdev_name *res;
     547             : 
     548         155 :         find.name = (char *)bdev_name;
     549         155 :         res = RB_FIND(bdev_name_tree, &g_bdev_mgr.bdev_names, &find);
     550         155 :         if (res != NULL) {
     551         148 :                 return res->bdev;
     552             :         }
     553             : 
     554           7 :         return NULL;
     555         155 : }
     556             : 
     557             : struct spdk_bdev *
     558          19 : spdk_bdev_get_by_name(const char *bdev_name)
     559             : {
     560             :         struct spdk_bdev *bdev;
     561             : 
     562          19 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
     563          19 :         bdev = bdev_get_by_name(bdev_name);
     564          19 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
     565             : 
     566          19 :         return bdev;
     567             : }
     568             : 
     569             : struct bdev_io_status_string {
     570             :         enum spdk_bdev_io_status status;
     571             :         const char *str;
     572             : };
     573             : 
     574             : static const struct bdev_io_status_string bdev_io_status_strings[] = {
     575             :         { SPDK_BDEV_IO_STATUS_AIO_ERROR, "aio_error" },
     576             :         { SPDK_BDEV_IO_STATUS_ABORTED, "aborted" },
     577             :         { SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED, "first_fused_failed" },
     578             :         { SPDK_BDEV_IO_STATUS_MISCOMPARE, "miscompare" },
     579             :         { SPDK_BDEV_IO_STATUS_NOMEM, "nomem" },
     580             :         { SPDK_BDEV_IO_STATUS_SCSI_ERROR, "scsi_error" },
     581             :         { SPDK_BDEV_IO_STATUS_NVME_ERROR, "nvme_error" },
     582             :         { SPDK_BDEV_IO_STATUS_FAILED, "failed" },
     583             :         { SPDK_BDEV_IO_STATUS_PENDING, "pending" },
     584             :         { SPDK_BDEV_IO_STATUS_SUCCESS, "success" },
     585             : };
     586             : 
     587             : static const char *
     588           0 : bdev_io_status_get_string(enum spdk_bdev_io_status status)
     589             : {
     590             :         uint32_t i;
     591             : 
     592           0 :         for (i = 0; i < SPDK_COUNTOF(bdev_io_status_strings); i++) {
     593           0 :                 if (bdev_io_status_strings[i].status == status) {
     594           0 :                         return bdev_io_status_strings[i].str;
     595             :                 }
     596           0 :         }
     597             : 
     598           0 :         return "reserved";
     599           0 : }
     600             : 
     601             : struct spdk_bdev_wait_for_examine_ctx {
     602             :         struct spdk_poller              *poller;
     603             :         spdk_bdev_wait_for_examine_cb   cb_fn;
     604             :         void                            *cb_arg;
     605             : };
     606             : 
     607             : static bool bdev_module_all_actions_completed(void);
     608             : 
     609             : static int
     610         203 : bdev_wait_for_examine_cb(void *arg)
     611             : {
     612         203 :         struct spdk_bdev_wait_for_examine_ctx *ctx = arg;
     613             : 
     614         203 :         if (!bdev_module_all_actions_completed()) {
     615           0 :                 return SPDK_POLLER_IDLE;
     616             :         }
     617             : 
     618         203 :         spdk_poller_unregister(&ctx->poller);
     619         203 :         ctx->cb_fn(ctx->cb_arg);
     620         203 :         free(ctx);
     621             : 
     622         203 :         return SPDK_POLLER_BUSY;
     623         203 : }
     624             : 
     625             : int
     626         203 : spdk_bdev_wait_for_examine(spdk_bdev_wait_for_examine_cb cb_fn, void *cb_arg)
     627             : {
     628             :         struct spdk_bdev_wait_for_examine_ctx *ctx;
     629             : 
     630         203 :         ctx = calloc(1, sizeof(*ctx));
     631         203 :         if (ctx == NULL) {
     632           0 :                 return -ENOMEM;
     633             :         }
     634         203 :         ctx->cb_fn = cb_fn;
     635         203 :         ctx->cb_arg = cb_arg;
     636         203 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_wait_for_examine_cb, ctx, 0);
     637             : 
     638         203 :         return 0;
     639         203 : }
     640             : 
     641             : struct spdk_bdev_examine_item {
     642             :         char *name;
     643             :         TAILQ_ENTRY(spdk_bdev_examine_item) link;
     644             : };
     645             : 
     646             : TAILQ_HEAD(spdk_bdev_examine_allowlist, spdk_bdev_examine_item);
     647             : 
     648             : struct spdk_bdev_examine_allowlist g_bdev_examine_allowlist = TAILQ_HEAD_INITIALIZER(
     649             :                         g_bdev_examine_allowlist);
     650             : 
     651             : static inline bool
     652          24 : bdev_examine_allowlist_check(const char *name)
     653             : {
     654             :         struct spdk_bdev_examine_item *item;
     655          24 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     656           3 :                 if (strcmp(name, item->name) == 0) {
     657           3 :                         return true;
     658             :                 }
     659           0 :         }
     660          21 :         return false;
     661          24 : }
     662             : 
     663             : static inline void
     664         258 : bdev_examine_allowlist_remove(const char *name)
     665             : {
     666             :         struct spdk_bdev_examine_item *item;
     667         258 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     668           3 :                 if (strcmp(name, item->name) == 0) {
     669           3 :                         TAILQ_REMOVE(&g_bdev_examine_allowlist, item, link);
     670           3 :                         free(item->name);
     671           3 :                         free(item);
     672           3 :                         break;
     673             :                 }
     674           0 :         }
     675         258 : }
     676             : 
     677             : static inline void
     678          68 : bdev_examine_allowlist_free(void)
     679             : {
     680             :         struct spdk_bdev_examine_item *item;
     681          68 :         while (!TAILQ_EMPTY(&g_bdev_examine_allowlist)) {
     682           0 :                 item = TAILQ_FIRST(&g_bdev_examine_allowlist);
     683           0 :                 TAILQ_REMOVE(&g_bdev_examine_allowlist, item, link);
     684           0 :                 free(item->name);
     685           0 :                 free(item);
     686             :         }
     687          68 : }
     688             : 
     689             : static inline bool
     690          12 : bdev_in_examine_allowlist(struct spdk_bdev *bdev)
     691             : {
     692             :         struct spdk_bdev_alias *tmp;
     693          12 :         if (bdev_examine_allowlist_check(bdev->name)) {
     694           3 :                 return true;
     695             :         }
     696          18 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
     697           9 :                 if (bdev_examine_allowlist_check(tmp->alias.name)) {
     698           0 :                         return true;
     699             :                 }
     700           9 :         }
     701           9 :         return false;
     702          12 : }
     703             : 
     704             : static inline bool
     705         133 : bdev_ok_to_examine(struct spdk_bdev *bdev)
     706             : {
     707             :         /* Some bdevs may not support the READ command.
     708             :          * Do not try to examine them.
     709             :          */
     710         133 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_READ)) {
     711           0 :                 return false;
     712             :         }
     713             : 
     714         133 :         if (g_bdev_opts.bdev_auto_examine) {
     715         121 :                 return true;
     716             :         } else {
     717          12 :                 return bdev_in_examine_allowlist(bdev);
     718             :         }
     719         133 : }
     720             : 
     721             : static void
     722         133 : bdev_examine(struct spdk_bdev *bdev)
     723             : {
     724             :         struct spdk_bdev_module *module;
     725             :         struct spdk_bdev_module_claim *claim, *tmpclaim;
     726             :         uint32_t action;
     727             : 
     728         133 :         if (!bdev_ok_to_examine(bdev)) {
     729           9 :                 return;
     730             :         }
     731             : 
     732         506 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     733         382 :                 if (module->examine_config) {
     734         258 :                         spdk_spin_lock(&module->internal.spinlock);
     735         258 :                         action = module->internal.action_in_progress;
     736         258 :                         module->internal.action_in_progress++;
     737         258 :                         spdk_spin_unlock(&module->internal.spinlock);
     738         258 :                         module->examine_config(bdev);
     739         258 :                         if (action != module->internal.action_in_progress) {
     740           0 :                                 SPDK_ERRLOG("examine_config for module %s did not call "
     741             :                                             "spdk_bdev_module_examine_done()\n", module->name);
     742           0 :                         }
     743         258 :                 }
     744         382 :         }
     745             : 
     746         124 :         spdk_spin_lock(&bdev->internal.spinlock);
     747             : 
     748         124 :         switch (bdev->internal.claim_type) {
     749             :         case SPDK_BDEV_CLAIM_NONE:
     750             :                 /* Examine by all bdev modules */
     751         466 :                 TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     752         350 :                         if (module->examine_disk) {
     753         225 :                                 spdk_spin_lock(&module->internal.spinlock);
     754         225 :                                 module->internal.action_in_progress++;
     755         225 :                                 spdk_spin_unlock(&module->internal.spinlock);
     756         225 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
     757         225 :                                 module->examine_disk(bdev);
     758         225 :                                 spdk_spin_lock(&bdev->internal.spinlock);
     759         225 :                         }
     760         350 :                 }
     761         116 :                 break;
     762             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
     763             :                 /* Examine by the one bdev module with a v1 claim */
     764           1 :                 module = bdev->internal.claim.v1.module;
     765           1 :                 if (module->examine_disk) {
     766           1 :                         spdk_spin_lock(&module->internal.spinlock);
     767           1 :                         module->internal.action_in_progress++;
     768           1 :                         spdk_spin_unlock(&module->internal.spinlock);
     769           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     770           1 :                         module->examine_disk(bdev);
     771           1 :                         return;
     772             :                 }
     773           0 :                 break;
     774             :         default:
     775             :                 /* Examine by all bdev modules with a v2 claim */
     776           7 :                 assert(claim_type_is_v2(bdev->internal.claim_type));
     777             :                 /*
     778             :                  * Removal of tailq nodes while iterating can cause the iteration to jump out of the
     779             :                  * list, perhaps accessing freed memory. Without protection, this could happen
     780             :                  * while the lock is dropped during the examine callback.
     781             :                  */
     782           7 :                 bdev->internal.examine_in_progress++;
     783             : 
     784          16 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
     785           9 :                         module = claim->module;
     786             : 
     787           9 :                         if (module == NULL) {
     788             :                                 /* This is a vestigial claim, held by examine_count */
     789           0 :                                 continue;
     790             :                         }
     791             : 
     792           9 :                         if (module->examine_disk == NULL) {
     793           0 :                                 continue;
     794             :                         }
     795             : 
     796           9 :                         spdk_spin_lock(&module->internal.spinlock);
     797           9 :                         module->internal.action_in_progress++;
     798           9 :                         spdk_spin_unlock(&module->internal.spinlock);
     799             : 
     800             :                         /* Call examine_disk without holding internal.spinlock. */
     801           9 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     802           9 :                         module->examine_disk(bdev);
     803           9 :                         spdk_spin_lock(&bdev->internal.spinlock);
     804           9 :                 }
     805             : 
     806           7 :                 assert(bdev->internal.examine_in_progress > 0);
     807           7 :                 bdev->internal.examine_in_progress--;
     808           7 :                 if (bdev->internal.examine_in_progress == 0) {
     809             :                         /* Remove any claims that were released during examine_disk */
     810          16 :                         TAILQ_FOREACH_SAFE(claim, &bdev->internal.claim.v2.claims, link, tmpclaim) {
     811           9 :                                 if (claim->desc != NULL) {
     812           9 :                                         continue;
     813             :                                 }
     814             : 
     815           0 :                                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, claim, link);
     816           0 :                                 free(claim);
     817           0 :                         }
     818           7 :                         if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
     819           0 :                                 claim_reset(bdev);
     820           0 :                         }
     821           7 :                 }
     822           7 :         }
     823             : 
     824         123 :         spdk_spin_unlock(&bdev->internal.spinlock);
     825         133 : }
     826             : 
     827             : int
     828           4 : spdk_bdev_examine(const char *name)
     829             : {
     830             :         struct spdk_bdev *bdev;
     831             :         struct spdk_bdev_examine_item *item;
     832           4 :         struct spdk_thread *thread = spdk_get_thread();
     833             : 
     834           4 :         if (spdk_unlikely(!spdk_thread_is_app_thread(thread))) {
     835           1 :                 SPDK_ERRLOG("Cannot examine bdev %s on thread %p (%s)\n", name, thread,
     836             :                             thread ? spdk_thread_get_name(thread) : "null");
     837           1 :                 return -EINVAL;
     838             :         }
     839             : 
     840           3 :         if (g_bdev_opts.bdev_auto_examine) {
     841           0 :                 SPDK_ERRLOG("Manual examine is not allowed if auto examine is enabled\n");
     842           0 :                 return -EINVAL;
     843             :         }
     844             : 
     845           3 :         if (bdev_examine_allowlist_check(name)) {
     846           0 :                 SPDK_ERRLOG("Duplicate bdev name for manual examine: %s\n", name);
     847           0 :                 return -EEXIST;
     848             :         }
     849             : 
     850           3 :         item = calloc(1, sizeof(*item));
     851           3 :         if (!item) {
     852           0 :                 return -ENOMEM;
     853             :         }
     854           3 :         item->name = strdup(name);
     855           3 :         if (!item->name) {
     856           0 :                 free(item);
     857           0 :                 return -ENOMEM;
     858             :         }
     859           3 :         TAILQ_INSERT_TAIL(&g_bdev_examine_allowlist, item, link);
     860             : 
     861           3 :         bdev = spdk_bdev_get_by_name(name);
     862           3 :         if (bdev) {
     863           3 :                 bdev_examine(bdev);
     864           3 :         }
     865           3 :         return 0;
     866           4 : }
     867             : 
     868             : static inline void
     869           0 : bdev_examine_allowlist_config_json(struct spdk_json_write_ctx *w)
     870             : {
     871             :         struct spdk_bdev_examine_item *item;
     872           0 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     873           0 :                 spdk_json_write_object_begin(w);
     874           0 :                 spdk_json_write_named_string(w, "method", "bdev_examine");
     875           0 :                 spdk_json_write_named_object_begin(w, "params");
     876           0 :                 spdk_json_write_named_string(w, "name", item->name);
     877           0 :                 spdk_json_write_object_end(w);
     878           0 :                 spdk_json_write_object_end(w);
     879           0 :         }
     880           0 : }
     881             : 
     882             : struct spdk_bdev *
     883           1 : spdk_bdev_first(void)
     884             : {
     885             :         struct spdk_bdev *bdev;
     886             : 
     887           1 :         bdev = TAILQ_FIRST(&g_bdev_mgr.bdevs);
     888           1 :         if (bdev) {
     889           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     890           1 :         }
     891             : 
     892           1 :         return bdev;
     893             : }
     894             : 
     895             : struct spdk_bdev *
     896           8 : spdk_bdev_next(struct spdk_bdev *prev)
     897             : {
     898             :         struct spdk_bdev *bdev;
     899             : 
     900           8 :         bdev = TAILQ_NEXT(prev, internal.link);
     901           8 :         if (bdev) {
     902           7 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     903           7 :         }
     904             : 
     905           8 :         return bdev;
     906             : }
     907             : 
     908             : static struct spdk_bdev *
     909           6 : _bdev_next_leaf(struct spdk_bdev *bdev)
     910             : {
     911           9 :         while (bdev != NULL) {
     912           8 :                 if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
     913           5 :                         return bdev;
     914             :                 } else {
     915           3 :                         bdev = TAILQ_NEXT(bdev, internal.link);
     916             :                 }
     917             :         }
     918             : 
     919           1 :         return bdev;
     920           6 : }
     921             : 
     922             : struct spdk_bdev *
     923           1 : spdk_bdev_first_leaf(void)
     924             : {
     925             :         struct spdk_bdev *bdev;
     926             : 
     927           1 :         bdev = _bdev_next_leaf(TAILQ_FIRST(&g_bdev_mgr.bdevs));
     928             : 
     929           1 :         if (bdev) {
     930           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     931           1 :         }
     932             : 
     933           1 :         return bdev;
     934             : }
     935             : 
     936             : struct spdk_bdev *
     937           5 : spdk_bdev_next_leaf(struct spdk_bdev *prev)
     938             : {
     939             :         struct spdk_bdev *bdev;
     940             : 
     941           5 :         bdev = _bdev_next_leaf(TAILQ_NEXT(prev, internal.link));
     942             : 
     943           5 :         if (bdev) {
     944           4 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     945           4 :         }
     946             : 
     947           5 :         return bdev;
     948             : }
     949             : 
     950             : static inline bool
     951         820 : bdev_io_use_memory_domain(struct spdk_bdev_io *bdev_io)
     952             : {
     953         820 :         return bdev_io->internal.f.has_memory_domain;
     954             : }
     955             : 
     956             : static inline bool
     957        1551 : bdev_io_use_accel_sequence(struct spdk_bdev_io *bdev_io)
     958             : {
     959        1551 :         return bdev_io->internal.f.has_accel_sequence;
     960             : }
     961             : 
     962             : static inline uint32_t
     963         373 : bdev_desc_get_block_size(struct spdk_bdev_desc *desc)
     964             : {
     965         373 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
     966             : 
     967         373 :         if (spdk_unlikely(desc->opts.hide_metadata)) {
     968           0 :                 return bdev->blocklen - bdev->md_len;
     969             :         } else {
     970         373 :                 return bdev->blocklen;
     971             :         }
     972         373 : }
     973             : 
     974             : static inline uint32_t
     975         110 : bdev_io_get_block_size(struct spdk_bdev_io *bdev_io)
     976             : {
     977         110 :         struct spdk_bdev *bdev = bdev_io->bdev;
     978             : 
     979         110 :         if (bdev_io->u.bdev.dif_check_flags & SPDK_DIF_FLAGS_NVME_PRACT) {
     980           0 :                 if (bdev->md_len == spdk_dif_pi_format_get_pi_size(bdev->dif_pi_format)) {
     981           0 :                         return bdev->blocklen - bdev->md_len;
     982             :                 } else {
     983           0 :                         return bdev->blocklen;
     984             :                 }
     985             :         }
     986             : 
     987         110 :         return bdev_desc_get_block_size(bdev_io->internal.desc);
     988         110 : }
     989             : 
     990             : static inline void
     991           7 : bdev_queue_nomem_io_head(struct spdk_bdev_shared_resource *shared_resource,
     992             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
     993             : {
     994             :         /* Wait for some of the outstanding I/O to complete before we retry any of the nomem_io.
     995             :          * Normally we will wait for NOMEM_THRESHOLD_COUNT I/O to complete but for low queue depth
     996             :          * channels we will instead wait for half to complete.
     997             :          */
     998           7 :         shared_resource->nomem_threshold = spdk_max((int64_t)shared_resource->io_outstanding / 2,
     999             :                                            (int64_t)shared_resource->io_outstanding - NOMEM_THRESHOLD_COUNT);
    1000             : 
    1001           7 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
    1002           7 :         bdev_io->internal.retry_state = state;
    1003           7 :         TAILQ_INSERT_HEAD(&shared_resource->nomem_io, bdev_io, internal.link);
    1004           7 : }
    1005             : 
    1006             : static inline void
    1007          43 : bdev_queue_nomem_io_tail(struct spdk_bdev_shared_resource *shared_resource,
    1008             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
    1009             : {
    1010             :         /* We only queue IOs at the end of the nomem_io queue if they're submitted by the user while
    1011             :          * the queue isn't empty, so we don't need to update the nomem_threshold here */
    1012          43 :         assert(!TAILQ_EMPTY(&shared_resource->nomem_io));
    1013             : 
    1014          43 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
    1015          43 :         bdev_io->internal.retry_state = state;
    1016          43 :         TAILQ_INSERT_TAIL(&shared_resource->nomem_io, bdev_io, internal.link);
    1017          43 : }
    1018             : 
    1019             : void
    1020          16 : spdk_bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len)
    1021             : {
    1022             :         struct iovec *iovs;
    1023             : 
    1024          16 :         if (bdev_io->u.bdev.iovs == NULL) {
    1025           3 :                 bdev_io->u.bdev.iovs = &bdev_io->iov;
    1026           3 :                 bdev_io->u.bdev.iovcnt = 1;
    1027           3 :         }
    1028             : 
    1029          16 :         iovs = bdev_io->u.bdev.iovs;
    1030             : 
    1031          16 :         assert(iovs != NULL);
    1032          16 :         assert(bdev_io->u.bdev.iovcnt >= 1);
    1033             : 
    1034          16 :         iovs[0].iov_base = buf;
    1035          16 :         iovs[0].iov_len = len;
    1036          16 : }
    1037             : 
    1038             : void
    1039           3 : spdk_bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
    1040             : {
    1041           3 :         assert((len / spdk_bdev_get_md_size(bdev_io->bdev)) >= bdev_io->u.bdev.num_blocks);
    1042           3 :         bdev_io->u.bdev.md_buf = md_buf;
    1043           3 : }
    1044             : 
    1045             : static bool
    1046         167 : _is_buf_allocated(const struct iovec *iovs)
    1047             : {
    1048         167 :         if (iovs == NULL) {
    1049           6 :                 return false;
    1050             :         }
    1051             : 
    1052         161 :         return iovs[0].iov_base != NULL;
    1053         167 : }
    1054             : 
    1055             : static bool
    1056          50 : _are_iovs_aligned(struct iovec *iovs, int iovcnt, uint32_t alignment)
    1057             : {
    1058             :         int i;
    1059             :         uintptr_t iov_base;
    1060             : 
    1061          50 :         if (spdk_likely(alignment == 1)) {
    1062          21 :                 return true;
    1063             :         }
    1064             : 
    1065          36 :         for (i = 0; i < iovcnt; i++) {
    1066          29 :                 iov_base = (uintptr_t)iovs[i].iov_base;
    1067          29 :                 if ((iov_base & (alignment - 1)) != 0) {
    1068          22 :                         return false;
    1069             :                 }
    1070           7 :         }
    1071             : 
    1072           7 :         return true;
    1073          50 : }
    1074             : 
    1075             : static inline bool
    1076         895 : bdev_io_needs_metadata(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    1077             : {
    1078        1048 :         return (bdev_io->bdev->md_len != 0) &&
    1079         153 :                (desc->opts.hide_metadata ||
    1080         153 :                 (bdev_io->u.bdev.dif_check_flags & SPDK_DIF_FLAGS_NVME_PRACT));
    1081             : }
    1082             : 
    1083             : static inline bool
    1084         852 : bdev_io_needs_sequence_exec(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    1085             : {
    1086         852 :         if (!bdev_io_use_accel_sequence(bdev_io)) {
    1087         852 :                 return false;
    1088             :         }
    1089             : 
    1090             :         /* For now, we don't allow splitting IOs with an accel sequence and will treat them as if
    1091             :          * bdev module didn't support accel sequences */
    1092           0 :         return !desc->accel_sequence_supported[bdev_io->type] || bdev_io->internal.f.split;
    1093         852 : }
    1094             : 
    1095             : static inline void
    1096         592 : bdev_io_increment_outstanding(struct spdk_bdev_channel *bdev_ch,
    1097             :                               struct spdk_bdev_shared_resource *shared_resource)
    1098             : {
    1099         592 :         bdev_ch->io_outstanding++;
    1100         592 :         shared_resource->io_outstanding++;
    1101         592 : }
    1102             : 
    1103             : static inline void
    1104         592 : bdev_io_decrement_outstanding(struct spdk_bdev_channel *bdev_ch,
    1105             :                               struct spdk_bdev_shared_resource *shared_resource)
    1106             : {
    1107         592 :         assert(bdev_ch->io_outstanding > 0);
    1108         592 :         assert(shared_resource->io_outstanding > 0);
    1109         592 :         bdev_ch->io_outstanding--;
    1110         592 :         shared_resource->io_outstanding--;
    1111         592 : }
    1112             : 
    1113             : static void
    1114           0 : bdev_io_submit_sequence_cb(void *ctx, int status)
    1115             : {
    1116           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1117             : 
    1118           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1119             : 
    1120           0 :         bdev_io->u.bdev.accel_sequence = NULL;
    1121           0 :         bdev_io->internal.f.has_accel_sequence = false;
    1122             : 
    1123           0 :         if (spdk_unlikely(status != 0)) {
    1124           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    1125           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1126           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    1127           0 :                 return;
    1128             :         }
    1129             : 
    1130           0 :         bdev_io_submit(bdev_io);
    1131           0 : }
    1132             : 
    1133             : static void
    1134           0 : bdev_io_exec_sequence_cb(void *ctx, int status)
    1135             : {
    1136           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1137           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1138             : 
    1139           0 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1140           0 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1141             : 
    1142           0 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1143           0 :                 bdev_ch_retry_io(ch);
    1144           0 :         }
    1145             : 
    1146           0 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1147           0 : }
    1148             : 
    1149             : static void
    1150           0 : bdev_io_exec_sequence(struct spdk_bdev_io *bdev_io, void (*cb_fn)(void *ctx, int status))
    1151             : {
    1152           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1153             : 
    1154           0 :         assert(bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1155           0 :         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE || bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1156           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1157             : 
    1158             :         /* Since the operations are appended during submission, they're in the opposite order than
    1159             :          * how we want to execute them for reads (i.e. we need to execute the most recently added
    1160             :          * operation first), so reverse the sequence before executing it.
    1161             :          */
    1162           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1163           0 :                 spdk_accel_sequence_reverse(bdev_io->internal.accel_sequence);
    1164           0 :         }
    1165             : 
    1166           0 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1167           0 :         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1168           0 :         bdev_io->internal.data_transfer_cpl = cb_fn;
    1169             : 
    1170           0 :         spdk_accel_sequence_finish(bdev_io->internal.accel_sequence,
    1171           0 :                                    bdev_io_exec_sequence_cb, bdev_io);
    1172           0 : }
    1173             : 
    1174             : static void
    1175          42 : bdev_io_get_buf_complete(struct spdk_bdev_io *bdev_io, bool status)
    1176             : {
    1177          42 :         struct spdk_io_channel *ch = spdk_bdev_io_get_io_channel(bdev_io);
    1178             :         void *buf;
    1179             : 
    1180          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1181           0 :                 buf = bdev_io->internal.buf.ptr;
    1182           0 :                 bdev_io->internal.buf.ptr = NULL;
    1183           0 :                 bdev_io->internal.f.has_buf = false;
    1184           0 :                 bdev_io->internal.get_aux_buf_cb(ch, bdev_io, buf);
    1185           0 :                 bdev_io->internal.get_aux_buf_cb = NULL;
    1186           0 :         } else {
    1187          42 :                 assert(bdev_io->internal.get_buf_cb != NULL);
    1188          42 :                 bdev_io->internal.get_buf_cb(ch, bdev_io, status);
    1189          42 :                 bdev_io->internal.get_buf_cb = NULL;
    1190             :         }
    1191          42 : }
    1192             : 
    1193             : static void
    1194           4 : _bdev_io_pull_buffer_cpl(void *ctx, int rc)
    1195             : {
    1196           4 :         struct spdk_bdev_io *bdev_io = ctx;
    1197             : 
    1198           4 :         if (rc) {
    1199           0 :                 SPDK_ERRLOG("Set bounce buffer failed with rc %d\n", rc);
    1200           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1201           0 :         }
    1202           4 :         bdev_io_get_buf_complete(bdev_io, !rc);
    1203           4 : }
    1204             : 
    1205             : static void
    1206           2 : bdev_io_pull_md_buf_done(void *ctx, int status)
    1207             : {
    1208           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1209           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1210             : 
    1211           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1212           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1213             : 
    1214           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1215           0 :                 bdev_ch_retry_io(ch);
    1216           0 :         }
    1217             : 
    1218           2 :         assert(bdev_io->internal.data_transfer_cpl);
    1219           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1220           2 : }
    1221             : 
    1222             : static void
    1223           4 : bdev_io_pull_md_buf(struct spdk_bdev_io *bdev_io)
    1224             : {
    1225           4 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1226           4 :         int rc = 0;
    1227             : 
    1228           4 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1229           2 :                 assert(bdev_io->internal.f.has_bounce_buf);
    1230           2 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1231           2 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1232           2 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1233           4 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1234           2 :                                                           bdev_io->internal.memory_domain_ctx,
    1235           2 :                                                           &bdev_io->internal.bounce_buf.orig_md_iov, 1,
    1236           2 :                                                           &bdev_io->internal.bounce_buf.md_iov, 1,
    1237           2 :                                                           bdev_io_pull_md_buf_done, bdev_io);
    1238           2 :                         if (rc == 0) {
    1239             :                                 /* Continue to submit IO in completion callback */
    1240           2 :                                 return;
    1241             :                         }
    1242           0 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1243           0 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1244           0 :                         if (rc != -ENOMEM) {
    1245           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s, rc %d\n",
    1246             :                                             spdk_memory_domain_get_dma_device_id(
    1247             :                                                     bdev_io->internal.memory_domain), rc);
    1248           0 :                         }
    1249           0 :                 } else {
    1250           0 :                         memcpy(bdev_io->internal.bounce_buf.md_iov.iov_base,
    1251           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_base,
    1252           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1253             :                 }
    1254           0 :         }
    1255             : 
    1256           2 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1257           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL_MD);
    1258           0 :         } else {
    1259           2 :                 assert(bdev_io->internal.data_transfer_cpl);
    1260           2 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1261             :         }
    1262           4 : }
    1263             : 
    1264             : static void
    1265           4 : _bdev_io_pull_bounce_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
    1266             : {
    1267           4 :         assert(bdev_io->internal.f.has_bounce_buf);
    1268             : 
    1269             :         /* save original md_buf */
    1270           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = bdev_io->u.bdev.md_buf;
    1271           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_len = len;
    1272           4 :         bdev_io->internal.bounce_buf.md_iov.iov_base = md_buf;
    1273           4 :         bdev_io->internal.bounce_buf.md_iov.iov_len = len;
    1274             :         /* set bounce md_buf */
    1275           4 :         bdev_io->u.bdev.md_buf = md_buf;
    1276             : 
    1277           4 :         bdev_io_pull_md_buf(bdev_io);
    1278           4 : }
    1279             : 
    1280             : static void
    1281          42 : _bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io)
    1282             : {
    1283          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1284             :         uint64_t md_len;
    1285             :         void *buf;
    1286             : 
    1287          42 :         if (spdk_bdev_is_md_separate(bdev)) {
    1288           7 :                 assert(!bdev_io_use_accel_sequence(bdev_io));
    1289             : 
    1290           7 :                 buf = (char *)bdev_io->u.bdev.iovs[0].iov_base + bdev_io->u.bdev.iovs[0].iov_len;
    1291           7 :                 md_len = bdev_io->u.bdev.num_blocks * bdev->md_len;
    1292             : 
    1293           7 :                 assert(((uintptr_t)buf & (spdk_bdev_get_buf_align(bdev) - 1)) == 0);
    1294             : 
    1295           7 :                 if (bdev_io->u.bdev.md_buf != NULL) {
    1296           4 :                         _bdev_io_pull_bounce_md_buf(bdev_io, buf, md_len);
    1297           4 :                         return;
    1298             :                 } else {
    1299           3 :                         spdk_bdev_io_set_md_buf(bdev_io, buf, md_len);
    1300             :                 }
    1301           3 :         }
    1302             : 
    1303          38 :         bdev_io_get_buf_complete(bdev_io, true);
    1304          42 : }
    1305             : 
    1306             : static inline void
    1307          26 : bdev_io_pull_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1308             : {
    1309          26 :         if (rc) {
    1310           0 :                 SPDK_ERRLOG("Failed to get data buffer\n");
    1311           0 :                 assert(bdev_io->internal.data_transfer_cpl);
    1312           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1313           0 :                 return;
    1314             :         }
    1315             : 
    1316          26 :         _bdev_io_set_md_buf(bdev_io);
    1317          26 : }
    1318             : 
    1319             : static void
    1320           2 : bdev_io_pull_data_done_and_track(void *ctx, int status)
    1321             : {
    1322           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1323           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1324             : 
    1325           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1326           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1327             : 
    1328           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1329           0 :                 bdev_ch_retry_io(ch);
    1330           0 :         }
    1331             : 
    1332           2 :         bdev_io_pull_data_done(bdev_io, status);
    1333           2 : }
    1334             : 
    1335             : static void
    1336          27 : bdev_io_pull_data(struct spdk_bdev_io *bdev_io)
    1337             : {
    1338          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1339          27 :         struct spdk_bdev_desc *desc = bdev_io->internal.desc;
    1340          27 :         int rc = 0;
    1341             : 
    1342          27 :         assert(bdev_io->internal.f.has_bounce_buf);
    1343             : 
    1344          27 :         if (bdev_io_needs_metadata(desc, bdev_io)) {
    1345           0 :                 assert(bdev_io->bdev->md_interleave);
    1346             : 
    1347           0 :                 bdev_io->u.bdev.dif_check_flags &= ~SPDK_DIF_FLAGS_NVME_PRACT;
    1348             : 
    1349           0 :                 if (!bdev_io_use_accel_sequence(bdev_io)) {
    1350           0 :                         bdev_io->internal.accel_sequence = NULL;
    1351           0 :                 }
    1352             : 
    1353           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1354           0 :                         rc = spdk_accel_append_dif_generate_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1355           0 :                                         bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1356           0 :                                         bdev_io->u.bdev.memory_domain,
    1357           0 :                                         bdev_io->u.bdev.memory_domain_ctx,
    1358           0 :                                         bdev_io->internal.bounce_buf.orig_iovs,
    1359           0 :                                         bdev_io->internal.bounce_buf.orig_iovcnt,
    1360           0 :                                         bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1361           0 :                                         bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1362           0 :                                         bdev_io->u.bdev.num_blocks,
    1363           0 :                                         &bdev_io->u.bdev.dif_ctx,
    1364             :                                         NULL, NULL);
    1365           0 :                 } else {
    1366           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1367           0 :                         rc = spdk_accel_append_dif_verify_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1368           0 :                                                                bdev_io->internal.bounce_buf.orig_iovs,
    1369           0 :                                                                bdev_io->internal.bounce_buf.orig_iovcnt,
    1370           0 :                                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1371           0 :                                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1372           0 :                                                                bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1373           0 :                                                                bdev_io->u.bdev.memory_domain,
    1374           0 :                                                                bdev_io->u.bdev.memory_domain_ctx,
    1375           0 :                                                                bdev_io->u.bdev.num_blocks,
    1376           0 :                                                                &bdev_io->u.bdev.dif_ctx,
    1377           0 :                                                                &bdev_io->u.bdev.dif_err,
    1378             :                                                                NULL, NULL);
    1379             :                 }
    1380             : 
    1381           0 :                 if (spdk_likely(rc == 0)) {
    1382           0 :                         bdev_io->internal.f.has_accel_sequence = true;
    1383           0 :                         bdev_io->u.bdev.accel_sequence = bdev_io->internal.accel_sequence;
    1384           0 :                 } else if (rc != -ENOMEM) {
    1385           0 :                         SPDK_ERRLOG("Failed to append generate/verify_copy to accel sequence: %p\n",
    1386             :                                     bdev_io->internal.accel_sequence);
    1387           0 :                 }
    1388          27 :         } else if (bdev_io_needs_sequence_exec(desc, bdev_io) ||
    1389          27 :                    (bdev_io_use_accel_sequence(bdev_io) && bdev_io_use_memory_domain(bdev_io))) {
    1390             :                 /* If we need to exec an accel sequence or the IO uses a memory domain buffer and has a
    1391             :                  * sequence, append a copy operation making accel change the src/dst buffers of the previous
    1392             :                  * operation */
    1393           0 :                 assert(bdev_io_use_accel_sequence(bdev_io));
    1394           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1395           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1396           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1397             :                                                     NULL, NULL,
    1398           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1399           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1400           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1401           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1402             :                                                     NULL, NULL);
    1403           0 :                 } else {
    1404             :                         /* We need to reverse the src/dst for reads */
    1405           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1406           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1407           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1408           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1409           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1410           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1411           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1412             :                                                     NULL, NULL, NULL, NULL);
    1413             :                 }
    1414             : 
    1415           0 :                 if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    1416           0 :                         SPDK_ERRLOG("Failed to append copy to accel sequence: %p\n",
    1417             :                                     bdev_io->internal.accel_sequence);
    1418           0 :                 }
    1419          27 :         } else if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1420             :                 /* if this is write path, copy data from original buffer to bounce buffer */
    1421          17 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1422           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1423           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1424           6 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1425           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1426           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1427           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1428           3 :                                                           bdev_io->u.bdev.iovs, 1,
    1429             :                                                           bdev_io_pull_data_done_and_track,
    1430           3 :                                                           bdev_io);
    1431           3 :                         if (rc == 0) {
    1432             :                                 /* Continue to submit IO in completion callback */
    1433           2 :                                 return;
    1434             :                         }
    1435           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1436           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1437           1 :                         if (rc != -ENOMEM) {
    1438           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s\n",
    1439             :                                             spdk_memory_domain_get_dma_device_id(
    1440             :                                                     bdev_io->internal.memory_domain));
    1441           0 :                         }
    1442           1 :                 } else {
    1443          14 :                         assert(bdev_io->u.bdev.iovcnt == 1);
    1444          28 :                         spdk_copy_iovs_to_buf(bdev_io->u.bdev.iovs[0].iov_base,
    1445          14 :                                               bdev_io->u.bdev.iovs[0].iov_len,
    1446          14 :                                               bdev_io->internal.bounce_buf.orig_iovs,
    1447          14 :                                               bdev_io->internal.bounce_buf.orig_iovcnt);
    1448             :                 }
    1449          15 :         }
    1450             : 
    1451          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1452           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1453           1 :         } else {
    1454          24 :                 bdev_io_pull_data_done(bdev_io, rc);
    1455             :         }
    1456          27 : }
    1457             : 
    1458             : static void
    1459          26 : _bdev_io_pull_bounce_data_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len,
    1460             :                               bdev_copy_bounce_buffer_cpl cpl_cb)
    1461             : {
    1462          26 :         struct spdk_bdev_shared_resource *shared_resource = bdev_io->internal.ch->shared_resource;
    1463             : 
    1464          26 :         assert(bdev_io->internal.f.has_bounce_buf == false);
    1465             : 
    1466          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1467          26 :         bdev_io->internal.f.has_bounce_buf = true;
    1468             :         /* save original iovec */
    1469          26 :         bdev_io->internal.bounce_buf.orig_iovs = bdev_io->u.bdev.iovs;
    1470          26 :         bdev_io->internal.bounce_buf.orig_iovcnt = bdev_io->u.bdev.iovcnt;
    1471             :         /* zero the other data members */
    1472          26 :         bdev_io->internal.bounce_buf.iov.iov_base = NULL;
    1473          26 :         bdev_io->internal.bounce_buf.md_iov.iov_base = NULL;
    1474          26 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = NULL;
    1475             :         /* set bounce iov */
    1476          26 :         bdev_io->u.bdev.iovs = &bdev_io->internal.bounce_buf.iov;
    1477          26 :         bdev_io->u.bdev.iovcnt = 1;
    1478             :         /* set bounce buffer for this operation */
    1479          26 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    1480          26 :         bdev_io->u.bdev.iovs[0].iov_len = len;
    1481             :         /* Now we use 1 iov, the split condition could have been changed */
    1482          26 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    1483             : 
    1484          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1485           0 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1486           0 :         } else {
    1487          26 :                 bdev_io_pull_data(bdev_io);
    1488             :         }
    1489          26 : }
    1490             : 
    1491             : static void
    1492          42 : _bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t len)
    1493             : {
    1494          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1495             :         bool buf_allocated;
    1496             :         uint64_t alignment;
    1497             :         void *aligned_buf;
    1498             : 
    1499          42 :         bdev_io->internal.buf.ptr = buf;
    1500          42 :         bdev_io->internal.f.has_buf = true;
    1501             : 
    1502          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1503           0 :                 bdev_io_get_buf_complete(bdev_io, true);
    1504           0 :                 return;
    1505             :         }
    1506             : 
    1507          42 :         alignment = spdk_bdev_get_buf_align(bdev);
    1508          42 :         buf_allocated = _is_buf_allocated(bdev_io->u.bdev.iovs);
    1509          42 :         aligned_buf = (void *)(((uintptr_t)buf + (alignment - 1)) & ~(alignment - 1));
    1510             : 
    1511          42 :         if (buf_allocated) {
    1512          26 :                 _bdev_io_pull_bounce_data_buf(bdev_io, aligned_buf, len, _bdev_io_pull_buffer_cpl);
    1513             :                 /* Continue in completion callback */
    1514          26 :                 return;
    1515             :         } else {
    1516          16 :                 spdk_bdev_io_set_buf(bdev_io, aligned_buf, len);
    1517             :         }
    1518             : 
    1519          16 :         _bdev_io_set_md_buf(bdev_io);
    1520          42 : }
    1521             : 
    1522             : static inline uint64_t
    1523          42 : bdev_io_get_max_buf_len(struct spdk_bdev_io *bdev_io, uint64_t len)
    1524             : {
    1525          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1526             :         uint64_t md_len, alignment;
    1527             : 
    1528          42 :         md_len = spdk_bdev_is_md_separate(bdev) ? bdev_io->u.bdev.num_blocks * bdev->md_len : 0;
    1529             : 
    1530             :         /* 1 byte alignment needs 0 byte of extra space, 64 bytes alignment needs 63 bytes of extra space, etc. */
    1531          42 :         alignment = spdk_bdev_get_buf_align(bdev) - 1;
    1532             : 
    1533          42 :         return len + alignment + md_len;
    1534             : }
    1535             : 
    1536             : static void
    1537          42 : bdev_io_put_accel_buf(struct spdk_bdev_io *bdev_io)
    1538             : {
    1539          42 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1540             : 
    1541          84 :         spdk_accel_put_buf(ch->accel_channel,
    1542          42 :                            bdev_io->internal.buf.ptr,
    1543          42 :                            bdev_io->u.bdev.memory_domain,
    1544          42 :                            bdev_io->u.bdev.memory_domain_ctx);
    1545          42 : }
    1546             : 
    1547             : static void
    1548           0 : _bdev_io_put_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t buf_len)
    1549             : {
    1550             :         struct spdk_bdev_mgmt_channel *ch;
    1551             : 
    1552           0 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1553           0 :         spdk_iobuf_put(&ch->iobuf, buf, bdev_io_get_max_buf_len(bdev_io, buf_len));
    1554           0 : }
    1555             : 
    1556             : static void
    1557          42 : bdev_io_put_buf(struct spdk_bdev_io *bdev_io)
    1558             : {
    1559          42 :         assert(bdev_io->internal.f.has_buf);
    1560             : 
    1561          42 :         if (bdev_io->u.bdev.memory_domain == spdk_accel_get_memory_domain()) {
    1562          42 :                 bdev_io_put_accel_buf(bdev_io);
    1563          42 :         } else {
    1564           0 :                 assert(bdev_io->u.bdev.memory_domain == NULL);
    1565           0 :                 _bdev_io_put_buf(bdev_io, bdev_io->internal.buf.ptr,
    1566           0 :                                  bdev_io->internal.buf.len);
    1567             :         }
    1568          42 :         bdev_io->internal.buf.ptr = NULL;
    1569          42 :         bdev_io->internal.f.has_buf = false;
    1570          42 : }
    1571             : 
    1572           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_put_aux_buf,
    1573             :                               "spdk_bdev_io_put_aux_buf is deprecated", "v25.01", 0);
    1574             : 
    1575             : void
    1576           0 : spdk_bdev_io_put_aux_buf(struct spdk_bdev_io *bdev_io, void *buf)
    1577             : {
    1578           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    1579             : 
    1580           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_put_aux_buf);
    1581             : 
    1582           0 :         assert(buf != NULL);
    1583           0 :         _bdev_io_put_buf(bdev_io, buf, len);
    1584           0 : }
    1585             : 
    1586             : static inline void
    1587         549 : bdev_submit_request(struct spdk_bdev *bdev, struct spdk_io_channel *ioch,
    1588             :                     struct spdk_bdev_io *bdev_io)
    1589             : {
    1590             :         /* After a request is submitted to a bdev module, the ownership of an accel sequence
    1591             :          * associated with that bdev_io is transferred to the bdev module. So, clear the internal
    1592             :          * sequence pointer to make sure we won't touch it anymore. */
    1593        1016 :         if ((bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE ||
    1594         549 :              bdev_io->type == SPDK_BDEV_IO_TYPE_READ) && bdev_io->u.bdev.accel_sequence != NULL) {
    1595           0 :                 assert(!bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1596           0 :                 bdev_io->internal.f.has_accel_sequence = false;
    1597           0 :         }
    1598             : 
    1599         549 :         bdev->fn_table->submit_request(ioch, bdev_io);
    1600         549 : }
    1601             : 
    1602             : static inline void
    1603          10 : bdev_ch_resubmit_io(struct spdk_bdev_shared_resource *shared_resource, struct spdk_bdev_io *bdev_io)
    1604             : {
    1605          10 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1606             : 
    1607          10 :         bdev_io_increment_outstanding(bdev_io->internal.ch, shared_resource);
    1608          10 :         bdev_io->internal.error.nvme.cdw0 = 0;
    1609          10 :         bdev_io->num_retries++;
    1610          10 :         bdev_submit_request(bdev, spdk_bdev_io_get_io_channel(bdev_io), bdev_io);
    1611          10 : }
    1612             : 
    1613             : static void
    1614          63 : bdev_shared_ch_retry_io(struct spdk_bdev_shared_resource *shared_resource)
    1615             : {
    1616             :         struct spdk_bdev_io *bdev_io;
    1617             : 
    1618          63 :         if (shared_resource->io_outstanding > shared_resource->nomem_threshold) {
    1619             :                 /*
    1620             :                  * Allow some more I/O to complete before retrying the nomem_io queue.
    1621             :                  *  Some drivers (such as nvme) cannot immediately take a new I/O in
    1622             :                  *  the context of a completion, because the resources for the I/O are
    1623             :                  *  not released until control returns to the bdev poller.  Also, we
    1624             :                  *  may require several small I/O to complete before a larger I/O
    1625             :                  *  (that requires splitting) can be submitted.
    1626             :                  */
    1627          58 :                 return;
    1628             :         }
    1629             : 
    1630          16 :         while (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1631          12 :                 bdev_io = TAILQ_FIRST(&shared_resource->nomem_io);
    1632          12 :                 TAILQ_REMOVE(&shared_resource->nomem_io, bdev_io, internal.link);
    1633             : 
    1634          12 :                 switch (bdev_io->internal.retry_state) {
    1635             :                 case BDEV_IO_RETRY_STATE_SUBMIT:
    1636          10 :                         bdev_ch_resubmit_io(shared_resource, bdev_io);
    1637          10 :                         break;
    1638             :                 case BDEV_IO_RETRY_STATE_PULL:
    1639           1 :                         bdev_io_pull_data(bdev_io);
    1640           1 :                         break;
    1641             :                 case BDEV_IO_RETRY_STATE_PULL_MD:
    1642           0 :                         bdev_io_pull_md_buf(bdev_io);
    1643           0 :                         break;
    1644             :                 case BDEV_IO_RETRY_STATE_PUSH:
    1645           1 :                         bdev_io_push_bounce_data(bdev_io);
    1646           1 :                         break;
    1647             :                 case BDEV_IO_RETRY_STATE_PUSH_MD:
    1648           0 :                         bdev_io_push_bounce_md_buf(bdev_io);
    1649           0 :                         break;
    1650             :                 case BDEV_IO_RETRY_STATE_GET_ACCEL_BUF:
    1651           0 :                         _bdev_io_get_accel_buf(bdev_io);
    1652           0 :                         break;
    1653             :                 default:
    1654           0 :                         assert(0 && "invalid retry state");
    1655             :                         break;
    1656             :                 }
    1657             : 
    1658          12 :                 if (bdev_io == TAILQ_FIRST(&shared_resource->nomem_io)) {
    1659             :                         /* This IO completed again with NOMEM status, so break the loop and
    1660             :                          * don't try anymore.  Note that a bdev_io that fails with NOMEM
    1661             :                          * always gets requeued at the front of the list, to maintain
    1662             :                          * ordering.
    1663             :                          */
    1664           1 :                         break;
    1665             :                 }
    1666             :         }
    1667          63 : }
    1668             : 
    1669             : static void
    1670          63 : bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch)
    1671             : {
    1672          63 :         bdev_shared_ch_retry_io(bdev_ch->shared_resource);
    1673          63 : }
    1674             : 
    1675             : static int
    1676           0 : bdev_no_mem_poller(void *ctx)
    1677             : {
    1678           0 :         struct spdk_bdev_shared_resource *shared_resource = ctx;
    1679             : 
    1680           0 :         spdk_poller_unregister(&shared_resource->nomem_poller);
    1681             : 
    1682           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1683           0 :                 bdev_shared_ch_retry_io(shared_resource);
    1684           0 :         }
    1685             :         /* the retry cb may re-register the poller so double check */
    1686           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io) &&
    1687           0 :             shared_resource->io_outstanding == 0 && shared_resource->nomem_poller == NULL) {
    1688             :                 /* No IOs were submitted, try again */
    1689           0 :                 shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1690             :                                                 SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1691           0 :         }
    1692             : 
    1693           0 :         return SPDK_POLLER_BUSY;
    1694             : }
    1695             : 
    1696             : static inline bool
    1697         556 : _bdev_io_handle_no_mem(struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
    1698             : {
    1699         556 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    1700         556 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    1701             : 
    1702         556 :         if (spdk_unlikely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM)) {
    1703           5 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    1704           5 :                 bdev_queue_nomem_io_head(shared_resource, bdev_io, state);
    1705             : 
    1706           5 :                 if (shared_resource->io_outstanding == 0 && !shared_resource->nomem_poller) {
    1707             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    1708             :                          * could trigger retry of queued IOs
    1709             :                          * Any IOs submitted may trigger retry of queued IOs. This poller handles a case when no
    1710             :                          * new IOs submitted, e.g. qd==1 */
    1711           0 :                         shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1712             :                                                         SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1713           0 :                 }
    1714             :                 /* If bdev module completed an I/O that has an accel sequence with NOMEM status, the
    1715             :                  * ownership of that sequence is transferred back to the bdev layer, so we need to
    1716             :                  * restore internal.accel_sequence to make sure that the sequence is handled
    1717             :                  * correctly in case the I/O is later aborted. */
    1718           5 :                 if ((bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    1719           5 :                      bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) && bdev_io->u.bdev.accel_sequence) {
    1720           0 :                         assert(!bdev_io_use_accel_sequence(bdev_io));
    1721           0 :                         bdev_io->internal.f.has_accel_sequence = true;
    1722           0 :                         bdev_io->internal.accel_sequence = bdev_io->u.bdev.accel_sequence;
    1723           0 :                 }
    1724             : 
    1725           5 :                 return true;
    1726             :         }
    1727             : 
    1728         551 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1729          63 :                 bdev_ch_retry_io(bdev_ch);
    1730          63 :         }
    1731             : 
    1732         551 :         return false;
    1733         556 : }
    1734             : 
    1735             : static void
    1736          26 : _bdev_io_complete_push_bounce_done(void *ctx, int rc)
    1737             : {
    1738          26 :         struct spdk_bdev_io *bdev_io = ctx;
    1739          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1740             : 
    1741          26 :         if (rc) {
    1742           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1743           0 :         }
    1744             :         /* We want to free the bounce buffer here since we know we're done with it (as opposed
    1745             :          * to waiting for the conditional free of internal.buf.ptr in spdk_bdev_free_io()).
    1746             :          */
    1747          26 :         bdev_io_put_buf(bdev_io);
    1748             : 
    1749          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1750           0 :                 bdev_ch_retry_io(ch);
    1751           0 :         }
    1752             : 
    1753             :         /* Continue with IO completion flow */
    1754          26 :         bdev_io_complete(bdev_io);
    1755          26 : }
    1756             : 
    1757             : static void
    1758           2 : bdev_io_push_bounce_md_buf_done(void *ctx, int rc)
    1759             : {
    1760           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1761           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1762             : 
    1763           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1764           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1765           2 :         bdev_io->internal.f.has_bounce_buf = false;
    1766             : 
    1767           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1768           0 :                 bdev_ch_retry_io(ch);
    1769           0 :         }
    1770             : 
    1771           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1772           2 : }
    1773             : 
    1774             : static inline void
    1775          26 : bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io)
    1776             : {
    1777          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1778          26 :         int rc = 0;
    1779             : 
    1780          26 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1781          26 :         assert(bdev_io->internal.f.has_bounce_buf);
    1782             : 
    1783             :         /* do the same for metadata buffer */
    1784          26 :         if (spdk_unlikely(bdev_io->internal.bounce_buf.orig_md_iov.iov_base != NULL)) {
    1785           4 :                 assert(spdk_bdev_is_md_separate(bdev_io->bdev));
    1786             : 
    1787           4 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1788           2 :                         if (bdev_io_use_memory_domain(bdev_io)) {
    1789           2 :                                 TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1790           2 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    1791             :                                 /* If memory domain is used then we need to call async push function */
    1792           4 :                                 rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1793           2 :                                                                   bdev_io->internal.memory_domain_ctx,
    1794           2 :                                                                   &bdev_io->internal.bounce_buf.orig_md_iov,
    1795           2 :                                                                   (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1796           2 :                                                                   &bdev_io->internal.bounce_buf.md_iov, 1,
    1797             :                                                                   bdev_io_push_bounce_md_buf_done,
    1798           2 :                                                                   bdev_io);
    1799           2 :                                 if (rc == 0) {
    1800             :                                         /* Continue IO completion in async callback */
    1801           2 :                                         return;
    1802             :                                 }
    1803           0 :                                 TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1804           0 :                                 bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1805           0 :                                 if (rc != -ENOMEM) {
    1806           0 :                                         SPDK_ERRLOG("Failed to push md to memory domain %s\n",
    1807             :                                                     spdk_memory_domain_get_dma_device_id(
    1808             :                                                             bdev_io->internal.memory_domain));
    1809           0 :                                 }
    1810           0 :                         } else {
    1811           0 :                                 memcpy(bdev_io->internal.bounce_buf.orig_md_iov.iov_base, bdev_io->u.bdev.md_buf,
    1812           0 :                                        bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1813             :                         }
    1814           0 :                 }
    1815           2 :         }
    1816             : 
    1817          24 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1818           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH_MD);
    1819           0 :         } else {
    1820          24 :                 assert(bdev_io->internal.data_transfer_cpl);
    1821          24 :                 bdev_io->internal.f.has_bounce_buf = false;
    1822          24 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1823             :         }
    1824          26 : }
    1825             : 
    1826             : static inline void
    1827          26 : bdev_io_push_bounce_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1828             : {
    1829          26 :         assert(bdev_io->internal.data_transfer_cpl);
    1830          26 :         if (rc) {
    1831           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1832           0 :                 return;
    1833             :         }
    1834             : 
    1835             :         /* set original buffer for this io */
    1836          26 :         bdev_io->u.bdev.iovcnt = bdev_io->internal.bounce_buf.orig_iovcnt;
    1837          26 :         bdev_io->u.bdev.iovs = bdev_io->internal.bounce_buf.orig_iovs;
    1838             : 
    1839             :         /* We don't set bdev_io->internal.f.has_bounce_buf to false here because
    1840             :          * we still need to clear the md buf */
    1841             : 
    1842          26 :         bdev_io_push_bounce_md_buf(bdev_io);
    1843          26 : }
    1844             : 
    1845             : static void
    1846           2 : bdev_io_push_bounce_data_done_and_track(void *ctx, int status)
    1847             : {
    1848           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1849           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1850             : 
    1851           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1852           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1853             : 
    1854           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1855           0 :                 bdev_ch_retry_io(ch);
    1856           0 :         }
    1857             : 
    1858           2 :         bdev_io_push_bounce_data_done(bdev_io, status);
    1859           2 : }
    1860             : 
    1861             : static inline void
    1862          27 : bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io)
    1863             : {
    1864          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1865          27 :         int rc = 0;
    1866             : 
    1867          27 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1868          27 :         assert(!bdev_io_use_accel_sequence(bdev_io));
    1869          27 :         assert(bdev_io->internal.f.has_bounce_buf);
    1870             : 
    1871             :         /* if this is read path, copy data from bounce buffer to original buffer */
    1872          27 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1873          11 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1874           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1875           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1876             :                         /* If memory domain is used then we need to call async push function */
    1877           6 :                         rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1878           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1879           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1880           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1881           3 :                                                           &bdev_io->internal.bounce_buf.iov, 1,
    1882             :                                                           bdev_io_push_bounce_data_done_and_track,
    1883           3 :                                                           bdev_io);
    1884           3 :                         if (rc == 0) {
    1885             :                                 /* Continue IO completion in async callback */
    1886           2 :                                 return;
    1887             :                         }
    1888             : 
    1889           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1890           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1891           1 :                         if (rc != -ENOMEM) {
    1892           0 :                                 SPDK_ERRLOG("Failed to push data to memory domain %s\n",
    1893             :                                             spdk_memory_domain_get_dma_device_id(
    1894             :                                                     bdev_io->internal.memory_domain));
    1895           0 :                         }
    1896           1 :                 } else {
    1897          16 :                         spdk_copy_buf_to_iovs(bdev_io->internal.bounce_buf.orig_iovs,
    1898           8 :                                               bdev_io->internal.bounce_buf.orig_iovcnt,
    1899           8 :                                               bdev_io->internal.bounce_buf.iov.iov_base,
    1900           8 :                                               bdev_io->internal.bounce_buf.iov.iov_len);
    1901             :                 }
    1902           9 :         }
    1903             : 
    1904          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1905           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH);
    1906           1 :         } else {
    1907          24 :                 bdev_io_push_bounce_data_done(bdev_io, rc);
    1908             :         }
    1909          27 : }
    1910             : 
    1911             : static inline void
    1912          26 : _bdev_io_push_bounce_data_buffer(struct spdk_bdev_io *bdev_io, bdev_copy_bounce_buffer_cpl cpl_cb)
    1913             : {
    1914          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1915          26 :         bdev_io_push_bounce_data(bdev_io);
    1916          26 : }
    1917             : 
    1918             : static void
    1919           0 : bdev_io_get_iobuf_cb(struct spdk_iobuf_entry *iobuf, void *buf)
    1920             : {
    1921             :         struct spdk_bdev_io *bdev_io;
    1922             : 
    1923           0 :         bdev_io = SPDK_CONTAINEROF(iobuf, struct spdk_bdev_io, internal.iobuf);
    1924           0 :         _bdev_io_set_buf(bdev_io, buf, bdev_io->internal.buf.len);
    1925           0 : }
    1926             : 
    1927             : static void
    1928          42 : bdev_io_get_buf(struct spdk_bdev_io *bdev_io, uint64_t len)
    1929             : {
    1930             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
    1931             :         uint64_t max_len;
    1932             :         void *buf;
    1933             : 
    1934          42 :         assert(spdk_bdev_io_get_thread(bdev_io) == spdk_get_thread());
    1935          42 :         mgmt_ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1936          42 :         max_len = bdev_io_get_max_buf_len(bdev_io, len);
    1937             : 
    1938          42 :         if (spdk_unlikely(max_len > mgmt_ch->iobuf.cache[0].large.bufsize)) {
    1939           0 :                 SPDK_ERRLOG("Length %" PRIu64 " is larger than allowed\n", max_len);
    1940           0 :                 bdev_io_get_buf_complete(bdev_io, false);
    1941           0 :                 return;
    1942             :         }
    1943             : 
    1944          42 :         bdev_io->internal.buf.len = len;
    1945          42 :         buf = spdk_iobuf_get(&mgmt_ch->iobuf, max_len, &bdev_io->internal.iobuf,
    1946             :                              bdev_io_get_iobuf_cb);
    1947          42 :         if (buf != NULL) {
    1948          42 :                 _bdev_io_set_buf(bdev_io, buf, len);
    1949          42 :         }
    1950          42 : }
    1951             : 
    1952             : void
    1953          56 : spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb, uint64_t len)
    1954             : {
    1955          56 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1956             :         uint64_t alignment;
    1957             : 
    1958          56 :         assert(cb != NULL);
    1959          56 :         bdev_io->internal.get_buf_cb = cb;
    1960             : 
    1961          56 :         alignment = spdk_bdev_get_buf_align(bdev);
    1962             : 
    1963          56 :         if (_is_buf_allocated(bdev_io->u.bdev.iovs) &&
    1964          40 :             _are_iovs_aligned(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt, alignment)) {
    1965             :                 /* Buffer already present and aligned */
    1966          18 :                 cb(spdk_bdev_io_get_io_channel(bdev_io), bdev_io, true);
    1967          18 :                 return;
    1968             :         }
    1969             : 
    1970          38 :         bdev_io_get_buf(bdev_io, len);
    1971          56 : }
    1972             : 
    1973             : static void
    1974           4 : _bdev_io_get_bounce_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb,
    1975             :                         uint64_t len)
    1976             : {
    1977           4 :         assert(cb != NULL);
    1978           4 :         bdev_io->internal.get_buf_cb = cb;
    1979             : 
    1980           4 :         bdev_io_get_buf(bdev_io, len);
    1981           4 : }
    1982             : 
    1983             : static void
    1984           0 : _bdev_io_get_accel_buf(struct spdk_bdev_io *bdev_io)
    1985             : {
    1986           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1987             :         void *buf;
    1988             :         int rc;
    1989             : 
    1990           0 :         rc = spdk_accel_get_buf(ch->accel_channel,
    1991           0 :                                 bdev_io->internal.buf.len,
    1992             :                                 &buf,
    1993           0 :                                 &bdev_io->u.bdev.memory_domain,
    1994           0 :                                 &bdev_io->u.bdev.memory_domain_ctx);
    1995           0 :         if (rc != 0) {
    1996           0 :                 bdev_queue_nomem_io_tail(ch->shared_resource, bdev_io,
    1997             :                                          BDEV_IO_RETRY_STATE_GET_ACCEL_BUF);
    1998           0 :                 return;
    1999             :         }
    2000             : 
    2001           0 :         _bdev_io_set_buf(bdev_io, buf, bdev_io->internal.buf.len);
    2002           0 : }
    2003             : 
    2004             : static inline void
    2005           0 : bdev_io_get_accel_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb,
    2006             :                       uint64_t len)
    2007             : {
    2008           0 :         bdev_io->internal.buf.len = len;
    2009           0 :         bdev_io->internal.get_buf_cb = cb;
    2010             : 
    2011           0 :         _bdev_io_get_accel_buf(bdev_io);
    2012           0 : }
    2013             : 
    2014           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_get_aux_buf,
    2015             :                               "spdk_bdev_io_get_aux_buf is deprecated", "v25.01", 0);
    2016             : 
    2017             : void
    2018           0 : spdk_bdev_io_get_aux_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_aux_buf_cb cb)
    2019             : {
    2020           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    2021             : 
    2022           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_get_aux_buf);
    2023             : 
    2024           0 :         assert(cb != NULL);
    2025           0 :         assert(bdev_io->internal.get_aux_buf_cb == NULL);
    2026           0 :         bdev_io->internal.get_aux_buf_cb = cb;
    2027           0 :         bdev_io_get_buf(bdev_io, len);
    2028           0 : }
    2029             : 
    2030             : static int
    2031          68 : bdev_module_get_max_ctx_size(void)
    2032             : {
    2033             :         struct spdk_bdev_module *bdev_module;
    2034          68 :         int max_bdev_module_size = 0;
    2035             : 
    2036         266 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2037         198 :                 if (bdev_module->get_ctx_size && bdev_module->get_ctx_size() > max_bdev_module_size) {
    2038          67 :                         max_bdev_module_size = bdev_module->get_ctx_size();
    2039          67 :                 }
    2040         198 :         }
    2041             : 
    2042          68 :         return max_bdev_module_size;
    2043             : }
    2044             : 
    2045             : static void
    2046           0 : bdev_enable_histogram_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    2047             : {
    2048           0 :         if (!bdev->internal.histogram_enabled) {
    2049           0 :                 return;
    2050             :         }
    2051             : 
    2052           0 :         spdk_json_write_object_begin(w);
    2053           0 :         spdk_json_write_named_string(w, "method", "bdev_enable_histogram");
    2054             : 
    2055           0 :         spdk_json_write_named_object_begin(w, "params");
    2056           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    2057             : 
    2058           0 :         spdk_json_write_named_bool(w, "enable", bdev->internal.histogram_enabled);
    2059             : 
    2060           0 :         if (bdev->internal.histogram_io_type) {
    2061           0 :                 spdk_json_write_named_string(w, "opc",
    2062           0 :                                              spdk_bdev_get_io_type_name(bdev->internal.histogram_io_type));
    2063           0 :         }
    2064             : 
    2065           0 :         spdk_json_write_object_end(w);
    2066             : 
    2067           0 :         spdk_json_write_object_end(w);
    2068           0 : }
    2069             : 
    2070             : static void
    2071           0 : bdev_qos_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    2072             : {
    2073             :         int i;
    2074           0 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    2075             :         uint64_t limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
    2076             : 
    2077           0 :         if (!qos) {
    2078           0 :                 return;
    2079             :         }
    2080             : 
    2081           0 :         spdk_bdev_get_qos_rate_limits(bdev, limits);
    2082             : 
    2083           0 :         spdk_json_write_object_begin(w);
    2084           0 :         spdk_json_write_named_string(w, "method", "bdev_set_qos_limit");
    2085             : 
    2086           0 :         spdk_json_write_named_object_begin(w, "params");
    2087           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    2088           0 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2089           0 :                 if (limits[i] > 0) {
    2090           0 :                         spdk_json_write_named_uint64(w, qos_rpc_type[i], limits[i]);
    2091           0 :                 }
    2092           0 :         }
    2093           0 :         spdk_json_write_object_end(w);
    2094             : 
    2095           0 :         spdk_json_write_object_end(w);
    2096           0 : }
    2097             : 
    2098             : void
    2099           0 : spdk_bdev_subsystem_config_json(struct spdk_json_write_ctx *w)
    2100             : {
    2101             :         struct spdk_bdev_module *bdev_module;
    2102             :         struct spdk_bdev *bdev;
    2103             : 
    2104           0 :         assert(w != NULL);
    2105             : 
    2106           0 :         spdk_json_write_array_begin(w);
    2107             : 
    2108           0 :         spdk_json_write_object_begin(w);
    2109           0 :         spdk_json_write_named_string(w, "method", "bdev_set_options");
    2110           0 :         spdk_json_write_named_object_begin(w, "params");
    2111           0 :         spdk_json_write_named_uint32(w, "bdev_io_pool_size", g_bdev_opts.bdev_io_pool_size);
    2112           0 :         spdk_json_write_named_uint32(w, "bdev_io_cache_size", g_bdev_opts.bdev_io_cache_size);
    2113           0 :         spdk_json_write_named_bool(w, "bdev_auto_examine", g_bdev_opts.bdev_auto_examine);
    2114           0 :         spdk_json_write_named_uint32(w, "iobuf_small_cache_size", g_bdev_opts.iobuf_small_cache_size);
    2115           0 :         spdk_json_write_named_uint32(w, "iobuf_large_cache_size", g_bdev_opts.iobuf_large_cache_size);
    2116           0 :         spdk_json_write_object_end(w);
    2117           0 :         spdk_json_write_object_end(w);
    2118             : 
    2119           0 :         bdev_examine_allowlist_config_json(w);
    2120             : 
    2121           0 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2122           0 :                 if (bdev_module->config_json) {
    2123           0 :                         bdev_module->config_json(w);
    2124           0 :                 }
    2125           0 :         }
    2126             : 
    2127           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    2128             : 
    2129           0 :         TAILQ_FOREACH(bdev, &g_bdev_mgr.bdevs, internal.link) {
    2130           0 :                 if (bdev->fn_table->write_config_json) {
    2131           0 :                         bdev->fn_table->write_config_json(bdev, w);
    2132           0 :                 }
    2133             : 
    2134           0 :                 bdev_qos_config_json(bdev, w);
    2135           0 :                 bdev_enable_histogram_config_json(bdev, w);
    2136           0 :         }
    2137             : 
    2138           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    2139             : 
    2140             :         /* This has to be last RPC in array to make sure all bdevs finished examine */
    2141           0 :         spdk_json_write_object_begin(w);
    2142           0 :         spdk_json_write_named_string(w, "method", "bdev_wait_for_examine");
    2143           0 :         spdk_json_write_object_end(w);
    2144             : 
    2145           0 :         spdk_json_write_array_end(w);
    2146           0 : }
    2147             : 
    2148             : static void
    2149          72 : bdev_mgmt_channel_destroy(void *io_device, void *ctx_buf)
    2150             : {
    2151          72 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2152             :         struct spdk_bdev_io *bdev_io;
    2153             : 
    2154          72 :         spdk_iobuf_channel_fini(&ch->iobuf);
    2155             : 
    2156       10226 :         while (!STAILQ_EMPTY(&ch->per_thread_cache)) {
    2157       10154 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2158       10154 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2159       10154 :                 ch->per_thread_cache_count--;
    2160       10154 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2161             :         }
    2162             : 
    2163          72 :         assert(ch->per_thread_cache_count == 0);
    2164          72 : }
    2165             : 
    2166             : static int
    2167          72 : bdev_mgmt_channel_create(void *io_device, void *ctx_buf)
    2168             : {
    2169          72 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2170             :         struct spdk_bdev_io *bdev_io;
    2171             :         uint32_t i;
    2172             :         int rc;
    2173             : 
    2174         144 :         rc = spdk_iobuf_channel_init(&ch->iobuf, "bdev",
    2175          72 :                                      g_bdev_opts.iobuf_small_cache_size,
    2176          72 :                                      g_bdev_opts.iobuf_large_cache_size);
    2177          72 :         if (rc != 0) {
    2178           0 :                 SPDK_ERRLOG("Failed to create iobuf channel: %s\n", spdk_strerror(-rc));
    2179           0 :                 return -1;
    2180             :         }
    2181             : 
    2182          72 :         STAILQ_INIT(&ch->per_thread_cache);
    2183          72 :         ch->bdev_io_cache_size = g_bdev_opts.bdev_io_cache_size;
    2184             : 
    2185             :         /* Pre-populate bdev_io cache to ensure this thread cannot be starved. */
    2186          72 :         ch->per_thread_cache_count = 0;
    2187       10226 :         for (i = 0; i < ch->bdev_io_cache_size; i++) {
    2188       10154 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2189       10154 :                 if (bdev_io == NULL) {
    2190           0 :                         SPDK_ERRLOG("You need to increase bdev_io_pool_size using bdev_set_options RPC.\n");
    2191           0 :                         assert(false);
    2192             :                         bdev_mgmt_channel_destroy(io_device, ctx_buf);
    2193             :                         return -1;
    2194             :                 }
    2195       10154 :                 ch->per_thread_cache_count++;
    2196       10154 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2197       10154 :         }
    2198             : 
    2199          72 :         TAILQ_INIT(&ch->shared_resources);
    2200          72 :         TAILQ_INIT(&ch->io_wait_queue);
    2201             : 
    2202          72 :         return 0;
    2203          72 : }
    2204             : 
    2205             : static void
    2206          68 : bdev_init_complete(int rc)
    2207             : {
    2208          68 :         spdk_bdev_init_cb cb_fn = g_init_cb_fn;
    2209          68 :         void *cb_arg = g_init_cb_arg;
    2210             :         struct spdk_bdev_module *m;
    2211             : 
    2212          68 :         g_bdev_mgr.init_complete = true;
    2213          68 :         g_init_cb_fn = NULL;
    2214          68 :         g_init_cb_arg = NULL;
    2215             : 
    2216             :         /*
    2217             :          * For modules that need to know when subsystem init is complete,
    2218             :          * inform them now.
    2219             :          */
    2220          68 :         if (rc == 0) {
    2221         266 :                 TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2222         198 :                         if (m->init_complete) {
    2223          24 :                                 m->init_complete();
    2224          24 :                         }
    2225         198 :                 }
    2226          68 :         }
    2227             : 
    2228          68 :         cb_fn(cb_arg, rc);
    2229          68 : }
    2230             : 
    2231             : static bool
    2232         271 : bdev_module_all_actions_completed(void)
    2233             : {
    2234             :         struct spdk_bdev_module *m;
    2235             : 
    2236        1078 :         TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2237         807 :                 if (m->internal.action_in_progress > 0) {
    2238           0 :                         return false;
    2239             :                 }
    2240         807 :         }
    2241         271 :         return true;
    2242         271 : }
    2243             : 
    2244             : static void
    2245         629 : bdev_module_action_complete(void)
    2246             : {
    2247             :         /*
    2248             :          * Don't finish bdev subsystem initialization if
    2249             :          * module pre-initialization is still in progress, or
    2250             :          * the subsystem been already initialized.
    2251             :          */
    2252         629 :         if (!g_bdev_mgr.module_init_complete || g_bdev_mgr.init_complete) {
    2253         561 :                 return;
    2254             :         }
    2255             : 
    2256             :         /*
    2257             :          * Check all bdev modules for inits/examinations in progress. If any
    2258             :          * exist, return immediately since we cannot finish bdev subsystem
    2259             :          * initialization until all are completed.
    2260             :          */
    2261          68 :         if (!bdev_module_all_actions_completed()) {
    2262           0 :                 return;
    2263             :         }
    2264             : 
    2265             :         /*
    2266             :          * Modules already finished initialization - now that all
    2267             :          * the bdev modules have finished their asynchronous I/O
    2268             :          * processing, the entire bdev layer can be marked as complete.
    2269             :          */
    2270          68 :         bdev_init_complete(0);
    2271         629 : }
    2272             : 
    2273             : static void
    2274         561 : bdev_module_action_done(struct spdk_bdev_module *module)
    2275             : {
    2276         561 :         spdk_spin_lock(&module->internal.spinlock);
    2277         561 :         assert(module->internal.action_in_progress > 0);
    2278         561 :         module->internal.action_in_progress--;
    2279         561 :         spdk_spin_unlock(&module->internal.spinlock);
    2280         561 :         bdev_module_action_complete();
    2281         561 : }
    2282             : 
    2283             : void
    2284          68 : spdk_bdev_module_init_done(struct spdk_bdev_module *module)
    2285             : {
    2286          68 :         assert(module->async_init);
    2287          68 :         bdev_module_action_done(module);
    2288          68 : }
    2289             : 
    2290             : void
    2291         493 : spdk_bdev_module_examine_done(struct spdk_bdev_module *module)
    2292             : {
    2293         493 :         bdev_module_action_done(module);
    2294         493 : }
    2295             : 
    2296             : /** The last initialized bdev module */
    2297             : static struct spdk_bdev_module *g_resume_bdev_module = NULL;
    2298             : 
    2299             : static void
    2300           0 : bdev_init_failed(void *cb_arg)
    2301             : {
    2302           0 :         struct spdk_bdev_module *module = cb_arg;
    2303             : 
    2304           0 :         spdk_spin_lock(&module->internal.spinlock);
    2305           0 :         assert(module->internal.action_in_progress > 0);
    2306           0 :         module->internal.action_in_progress--;
    2307           0 :         spdk_spin_unlock(&module->internal.spinlock);
    2308           0 :         bdev_init_complete(-1);
    2309           0 : }
    2310             : 
    2311             : static int
    2312          68 : bdev_modules_init(void)
    2313             : {
    2314             :         struct spdk_bdev_module *module;
    2315          68 :         int rc = 0;
    2316             : 
    2317         266 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2318         198 :                 g_resume_bdev_module = module;
    2319         198 :                 if (module->async_init) {
    2320          68 :                         spdk_spin_lock(&module->internal.spinlock);
    2321          68 :                         module->internal.action_in_progress = 1;
    2322          68 :                         spdk_spin_unlock(&module->internal.spinlock);
    2323          68 :                 }
    2324         198 :                 rc = module->module_init();
    2325         198 :                 if (rc != 0) {
    2326             :                         /* Bump action_in_progress to prevent other modules from completion of modules_init
    2327             :                          * Send message to defer application shutdown until resources are cleaned up */
    2328           0 :                         spdk_spin_lock(&module->internal.spinlock);
    2329           0 :                         module->internal.action_in_progress = 1;
    2330           0 :                         spdk_spin_unlock(&module->internal.spinlock);
    2331           0 :                         spdk_thread_send_msg(spdk_get_thread(), bdev_init_failed, module);
    2332           0 :                         return rc;
    2333             :                 }
    2334         198 :         }
    2335             : 
    2336          68 :         g_resume_bdev_module = NULL;
    2337          68 :         return 0;
    2338          68 : }
    2339             : 
    2340             : void
    2341          68 : spdk_bdev_initialize(spdk_bdev_init_cb cb_fn, void *cb_arg)
    2342             : {
    2343          68 :         int rc = 0;
    2344             :         char mempool_name[32];
    2345             : 
    2346          68 :         assert(cb_fn != NULL);
    2347             : 
    2348          68 :         g_init_cb_fn = cb_fn;
    2349          68 :         g_init_cb_arg = cb_arg;
    2350             : 
    2351          68 :         spdk_notify_type_register("bdev_register");
    2352          68 :         spdk_notify_type_register("bdev_unregister");
    2353             : 
    2354          68 :         snprintf(mempool_name, sizeof(mempool_name), "bdev_io_%d", getpid());
    2355             : 
    2356          68 :         rc = spdk_iobuf_register_module("bdev");
    2357          68 :         if (rc != 0) {
    2358           0 :                 SPDK_ERRLOG("could not register bdev iobuf module: %s\n", spdk_strerror(-rc));
    2359           0 :                 bdev_init_complete(-1);
    2360           0 :                 return;
    2361             :         }
    2362             : 
    2363         136 :         g_bdev_mgr.bdev_io_pool = spdk_mempool_create(mempool_name,
    2364          68 :                                   g_bdev_opts.bdev_io_pool_size,
    2365          68 :                                   sizeof(struct spdk_bdev_io) +
    2366          68 :                                   bdev_module_get_max_ctx_size(),
    2367             :                                   0,
    2368             :                                   SPDK_ENV_NUMA_ID_ANY);
    2369             : 
    2370          68 :         if (g_bdev_mgr.bdev_io_pool == NULL) {
    2371           0 :                 SPDK_ERRLOG("could not allocate spdk_bdev_io pool\n");
    2372           0 :                 bdev_init_complete(-1);
    2373           0 :                 return;
    2374             :         }
    2375             : 
    2376          68 :         g_bdev_mgr.zero_buffer = spdk_zmalloc(ZERO_BUFFER_SIZE, ZERO_BUFFER_SIZE,
    2377             :                                               NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
    2378          68 :         if (!g_bdev_mgr.zero_buffer) {
    2379           0 :                 SPDK_ERRLOG("create bdev zero buffer failed\n");
    2380           0 :                 bdev_init_complete(-1);
    2381           0 :                 return;
    2382             :         }
    2383             : 
    2384             : #ifdef SPDK_CONFIG_VTUNE
    2385             :         g_bdev_mgr.domain = __itt_domain_create("spdk_bdev");
    2386             : #endif
    2387             : 
    2388          68 :         spdk_io_device_register(&g_bdev_mgr, bdev_mgmt_channel_create,
    2389             :                                 bdev_mgmt_channel_destroy,
    2390             :                                 sizeof(struct spdk_bdev_mgmt_channel),
    2391             :                                 "bdev_mgr");
    2392             : 
    2393          68 :         rc = bdev_modules_init();
    2394          68 :         g_bdev_mgr.module_init_complete = true;
    2395          68 :         if (rc != 0) {
    2396           0 :                 SPDK_ERRLOG("bdev modules init failed\n");
    2397           0 :                 return;
    2398             :         }
    2399             : 
    2400          68 :         bdev_module_action_complete();
    2401          68 : }
    2402             : 
    2403             : static void
    2404          68 : bdev_mgr_unregister_cb(void *io_device)
    2405             : {
    2406          68 :         spdk_bdev_fini_cb cb_fn = g_fini_cb_fn;
    2407             : 
    2408          68 :         if (g_bdev_mgr.bdev_io_pool) {
    2409          68 :                 if (spdk_mempool_count(g_bdev_mgr.bdev_io_pool) != g_bdev_opts.bdev_io_pool_size) {
    2410           0 :                         SPDK_ERRLOG("bdev IO pool count is %zu but should be %u\n",
    2411             :                                     spdk_mempool_count(g_bdev_mgr.bdev_io_pool),
    2412             :                                     g_bdev_opts.bdev_io_pool_size);
    2413           0 :                 }
    2414             : 
    2415          68 :                 spdk_mempool_free(g_bdev_mgr.bdev_io_pool);
    2416          68 :         }
    2417             : 
    2418          68 :         spdk_free(g_bdev_mgr.zero_buffer);
    2419             : 
    2420          68 :         bdev_examine_allowlist_free();
    2421             : 
    2422          68 :         cb_fn(g_fini_cb_arg);
    2423          68 :         g_fini_cb_fn = NULL;
    2424          68 :         g_fini_cb_arg = NULL;
    2425          68 :         g_bdev_mgr.init_complete = false;
    2426          68 :         g_bdev_mgr.module_init_complete = false;
    2427          68 : }
    2428             : 
    2429             : static void
    2430          68 : bdev_module_fini_iter(void *arg)
    2431             : {
    2432             :         struct spdk_bdev_module *bdev_module;
    2433             : 
    2434             :         /* FIXME: Handling initialization failures is broken now,
    2435             :          * so we won't even try cleaning up after successfully
    2436             :          * initialized modules. if module_init_complete is false,
    2437             :          * just call spdk_bdev_mgr_unregister_cb
    2438             :          */
    2439          68 :         if (!g_bdev_mgr.module_init_complete) {
    2440           0 :                 bdev_mgr_unregister_cb(NULL);
    2441           0 :                 return;
    2442             :         }
    2443             : 
    2444             :         /* Start iterating from the last touched module */
    2445          68 :         if (!g_resume_bdev_module) {
    2446          68 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2447          68 :         } else {
    2448           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list,
    2449             :                                          internal.tailq);
    2450             :         }
    2451             : 
    2452         266 :         while (bdev_module) {
    2453         198 :                 if (bdev_module->async_fini) {
    2454             :                         /* Save our place so we can resume later. We must
    2455             :                          * save the variable here, before calling module_fini()
    2456             :                          * below, because in some cases the module may immediately
    2457             :                          * call spdk_bdev_module_fini_done() and re-enter
    2458             :                          * this function to continue iterating. */
    2459           0 :                         g_resume_bdev_module = bdev_module;
    2460           0 :                 }
    2461             : 
    2462         198 :                 if (bdev_module->module_fini) {
    2463         198 :                         bdev_module->module_fini();
    2464         198 :                 }
    2465             : 
    2466         198 :                 if (bdev_module->async_fini) {
    2467           0 :                         return;
    2468             :                 }
    2469             : 
    2470         198 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list,
    2471             :                                          internal.tailq);
    2472             :         }
    2473             : 
    2474          68 :         g_resume_bdev_module = NULL;
    2475          68 :         spdk_io_device_unregister(&g_bdev_mgr, bdev_mgr_unregister_cb);
    2476          68 : }
    2477             : 
    2478             : void
    2479           0 : spdk_bdev_module_fini_done(void)
    2480             : {
    2481           0 :         if (spdk_get_thread() != g_fini_thread) {
    2482           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_iter, NULL);
    2483           0 :         } else {
    2484           0 :                 bdev_module_fini_iter(NULL);
    2485             :         }
    2486           0 : }
    2487             : 
    2488             : static void
    2489          68 : bdev_finish_unregister_bdevs_iter(void *cb_arg, int bdeverrno)
    2490             : {
    2491          68 :         struct spdk_bdev *bdev = cb_arg;
    2492             : 
    2493          68 :         if (bdeverrno && bdev) {
    2494           0 :                 SPDK_WARNLOG("Unable to unregister bdev '%s' during spdk_bdev_finish()\n",
    2495             :                              bdev->name);
    2496             : 
    2497             :                 /*
    2498             :                  * Since the call to spdk_bdev_unregister() failed, we have no way to free this
    2499             :                  *  bdev; try to continue by manually removing this bdev from the list and continue
    2500             :                  *  with the next bdev in the list.
    2501             :                  */
    2502           0 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    2503           0 :         }
    2504             : 
    2505          68 :         if (TAILQ_EMPTY(&g_bdev_mgr.bdevs)) {
    2506          68 :                 SPDK_DEBUGLOG(bdev, "Done unregistering bdevs\n");
    2507             :                 /*
    2508             :                  * Bdev module finish need to be deferred as we might be in the middle of some context
    2509             :                  * (like bdev part free) that will use this bdev (or private bdev driver ctx data)
    2510             :                  * after returning.
    2511             :                  */
    2512          68 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_module_fini_iter, NULL);
    2513          68 :                 return;
    2514             :         }
    2515             : 
    2516             :         /*
    2517             :          * Unregister last unclaimed bdev in the list, to ensure that bdev subsystem
    2518             :          * shutdown proceeds top-down. The goal is to give virtual bdevs an opportunity
    2519             :          * to detect clean shutdown as opposed to run-time hot removal of the underlying
    2520             :          * base bdevs.
    2521             :          *
    2522             :          * Also, walk the list in the reverse order.
    2523             :          */
    2524           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2525           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2526           0 :                 spdk_spin_lock(&bdev->internal.spinlock);
    2527           0 :                 if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    2528           0 :                         LOG_ALREADY_CLAIMED_DEBUG("claimed, skipping", bdev);
    2529           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    2530           0 :                         continue;
    2531             :                 }
    2532           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    2533             : 
    2534           0 :                 SPDK_DEBUGLOG(bdev, "Unregistering bdev '%s'\n", bdev->name);
    2535           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2536           0 :                 return;
    2537             :         }
    2538             : 
    2539             :         /*
    2540             :          * If any bdev fails to unclaim underlying bdev properly, we may face the
    2541             :          * case of bdev list consisting of claimed bdevs only (if claims are managed
    2542             :          * correctly, this would mean there's a loop in the claims graph which is
    2543             :          * clearly impossible). Warn and unregister last bdev on the list then.
    2544             :          */
    2545           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2546           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2547           0 :                 SPDK_WARNLOG("Unregistering claimed bdev '%s'!\n", bdev->name);
    2548           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2549           0 :                 return;
    2550             :         }
    2551          68 : }
    2552             : 
    2553             : static void
    2554          68 : bdev_module_fini_start_iter(void *arg)
    2555             : {
    2556             :         struct spdk_bdev_module *bdev_module;
    2557             : 
    2558          68 :         if (!g_resume_bdev_module) {
    2559          68 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2560          68 :         } else {
    2561           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list, internal.tailq);
    2562             :         }
    2563             : 
    2564         266 :         while (bdev_module) {
    2565         198 :                 if (bdev_module->async_fini_start) {
    2566             :                         /* Save our place so we can resume later. We must
    2567             :                          * save the variable here, before calling fini_start()
    2568             :                          * below, because in some cases the module may immediately
    2569             :                          * call spdk_bdev_module_fini_start_done() and re-enter
    2570             :                          * this function to continue iterating. */
    2571           0 :                         g_resume_bdev_module = bdev_module;
    2572           0 :                 }
    2573             : 
    2574         198 :                 if (bdev_module->fini_start) {
    2575          24 :                         bdev_module->fini_start();
    2576          24 :                 }
    2577             : 
    2578         198 :                 if (bdev_module->async_fini_start) {
    2579           0 :                         return;
    2580             :                 }
    2581             : 
    2582         198 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list, internal.tailq);
    2583             :         }
    2584             : 
    2585          68 :         g_resume_bdev_module = NULL;
    2586             : 
    2587          68 :         bdev_finish_unregister_bdevs_iter(NULL, 0);
    2588          68 : }
    2589             : 
    2590             : void
    2591           0 : spdk_bdev_module_fini_start_done(void)
    2592             : {
    2593           0 :         if (spdk_get_thread() != g_fini_thread) {
    2594           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_start_iter, NULL);
    2595           0 :         } else {
    2596           0 :                 bdev_module_fini_start_iter(NULL);
    2597             :         }
    2598           0 : }
    2599             : 
    2600             : static void
    2601          68 : bdev_finish_wait_for_examine_done(void *cb_arg)
    2602             : {
    2603          68 :         bdev_module_fini_start_iter(NULL);
    2604          68 : }
    2605             : 
    2606             : static void bdev_open_async_fini(void);
    2607             : 
    2608             : void
    2609          68 : spdk_bdev_finish(spdk_bdev_fini_cb cb_fn, void *cb_arg)
    2610             : {
    2611             :         int rc;
    2612             : 
    2613          68 :         assert(cb_fn != NULL);
    2614             : 
    2615          68 :         g_fini_thread = spdk_get_thread();
    2616             : 
    2617          68 :         g_fini_cb_fn = cb_fn;
    2618          68 :         g_fini_cb_arg = cb_arg;
    2619             : 
    2620          68 :         bdev_open_async_fini();
    2621             : 
    2622          68 :         rc = spdk_bdev_wait_for_examine(bdev_finish_wait_for_examine_done, NULL);
    2623          68 :         if (rc != 0) {
    2624           0 :                 SPDK_ERRLOG("wait_for_examine failed: %s\n", spdk_strerror(-rc));
    2625           0 :                 bdev_finish_wait_for_examine_done(NULL);
    2626           0 :         }
    2627          68 : }
    2628             : 
    2629             : struct spdk_bdev_io *
    2630         699 : bdev_channel_get_io(struct spdk_bdev_channel *channel)
    2631             : {
    2632         699 :         struct spdk_bdev_mgmt_channel *ch = channel->shared_resource->mgmt_ch;
    2633             :         struct spdk_bdev_io *bdev_io;
    2634             : 
    2635         699 :         if (ch->per_thread_cache_count > 0) {
    2636         639 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2637         639 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2638         639 :                 ch->per_thread_cache_count--;
    2639         699 :         } else if (spdk_unlikely(!TAILQ_EMPTY(&ch->io_wait_queue))) {
    2640             :                 /*
    2641             :                  * Don't try to look for bdev_ios in the global pool if there are
    2642             :                  * waiters on bdev_ios - we don't want this caller to jump the line.
    2643             :                  */
    2644           0 :                 bdev_io = NULL;
    2645           0 :         } else {
    2646          60 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2647             :         }
    2648             : 
    2649         699 :         return bdev_io;
    2650             : }
    2651             : 
    2652             : void
    2653         693 : spdk_bdev_free_io(struct spdk_bdev_io *bdev_io)
    2654             : {
    2655             :         struct spdk_bdev_mgmt_channel *ch;
    2656             : 
    2657         693 :         assert(bdev_io != NULL);
    2658         693 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING);
    2659             : 
    2660         693 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    2661             : 
    2662         693 :         if (bdev_io->internal.f.has_buf) {
    2663          16 :                 bdev_io_put_buf(bdev_io);
    2664          16 :         }
    2665             : 
    2666         693 :         if (ch->per_thread_cache_count < ch->bdev_io_cache_size) {
    2667         639 :                 ch->per_thread_cache_count++;
    2668         639 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2669         643 :                 while (ch->per_thread_cache_count > 0 && !TAILQ_EMPTY(&ch->io_wait_queue)) {
    2670             :                         struct spdk_bdev_io_wait_entry *entry;
    2671             : 
    2672           4 :                         entry = TAILQ_FIRST(&ch->io_wait_queue);
    2673           4 :                         TAILQ_REMOVE(&ch->io_wait_queue, entry, link);
    2674           4 :                         entry->cb_fn(entry->cb_arg);
    2675             :                 }
    2676         639 :         } else {
    2677             :                 /* We should never have a full cache with entries on the io wait queue. */
    2678          54 :                 assert(TAILQ_EMPTY(&ch->io_wait_queue));
    2679          54 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2680             :         }
    2681         693 : }
    2682             : 
    2683             : static bool
    2684          72 : bdev_qos_is_iops_rate_limit(enum spdk_bdev_qos_rate_limit_type limit)
    2685             : {
    2686          72 :         assert(limit != SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    2687             : 
    2688          72 :         switch (limit) {
    2689             :         case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2690          18 :                 return true;
    2691             :         case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2692             :         case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2693             :         case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2694          54 :                 return false;
    2695           0 :         case SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES:
    2696             :         default:
    2697           0 :                 return false;
    2698             :         }
    2699          72 : }
    2700             : 
    2701             : static bool
    2702          25 : bdev_qos_io_to_limit(struct spdk_bdev_io *bdev_io)
    2703             : {
    2704          25 :         switch (bdev_io->type) {
    2705             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2706             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2707             :         case SPDK_BDEV_IO_TYPE_READ:
    2708             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2709          23 :                 return true;
    2710             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2711           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2712           0 :                         return true;
    2713             :                 } else {
    2714           0 :                         return false;
    2715             :                 }
    2716             :         default:
    2717           2 :                 return false;
    2718             :         }
    2719          25 : }
    2720             : 
    2721             : static bool
    2722          33 : bdev_is_read_io(struct spdk_bdev_io *bdev_io)
    2723             : {
    2724          33 :         switch (bdev_io->type) {
    2725             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2726             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2727             :                 /* Bit 1 (0x2) set for read operation */
    2728           0 :                 if (bdev_io->u.nvme_passthru.cmd.opc & SPDK_NVME_OPC_READ) {
    2729           0 :                         return true;
    2730             :                 } else {
    2731           0 :                         return false;
    2732             :                 }
    2733             :         case SPDK_BDEV_IO_TYPE_READ:
    2734          30 :                 return true;
    2735             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2736             :                 /* Populate to read from disk */
    2737           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    2738           0 :                         return true;
    2739             :                 } else {
    2740           0 :                         return false;
    2741             :                 }
    2742             :         default:
    2743           3 :                 return false;
    2744             :         }
    2745          33 : }
    2746             : 
    2747             : static uint64_t
    2748          43 : bdev_get_io_size_in_byte(struct spdk_bdev_io *bdev_io)
    2749             : {
    2750          43 :         uint32_t blocklen = bdev_io_get_block_size(bdev_io);
    2751             : 
    2752          43 :         switch (bdev_io->type) {
    2753             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2754             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2755           0 :                 return bdev_io->u.nvme_passthru.nbytes;
    2756             :         case SPDK_BDEV_IO_TYPE_READ:
    2757             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2758          43 :                 return bdev_io->u.bdev.num_blocks * blocklen;
    2759             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2760             :                 /* Track the data in the start phase only */
    2761           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2762           0 :                         return bdev_io->u.bdev.num_blocks * blocklen;
    2763             :                 } else {
    2764           0 :                         return 0;
    2765             :                 }
    2766             :         default:
    2767           0 :                 return 0;
    2768             :         }
    2769          43 : }
    2770             : 
    2771             : static inline bool
    2772          64 : bdev_qos_rw_queue_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2773             : {
    2774             :         int64_t remaining_this_timeslice;
    2775             : 
    2776          64 :         if (!limit->max_per_timeslice) {
    2777             :                 /* The QoS is disabled */
    2778           0 :                 return false;
    2779             :         }
    2780             : 
    2781          64 :         remaining_this_timeslice = __atomic_sub_fetch(&limit->remaining_this_timeslice, delta,
    2782             :                                    __ATOMIC_RELAXED);
    2783          64 :         if (remaining_this_timeslice + (int64_t)delta > 0) {
    2784             :                 /* There was still a quota for this delta -> the IO shouldn't be queued
    2785             :                  *
    2786             :                  * We allow a slight quota overrun here so an IO bigger than the per-timeslice
    2787             :                  * quota can be allowed once a while. Such overrun then taken into account in
    2788             :                  * the QoS poller, where the next timeslice quota is calculated.
    2789             :                  */
    2790          59 :                 return false;
    2791             :         }
    2792             : 
    2793             :         /* There was no quota for this delta -> the IO should be queued
    2794             :          * The remaining_this_timeslice must be rewinded so it reflects the real
    2795             :          * amount of IOs or bytes allowed.
    2796             :          */
    2797           5 :         __atomic_add_fetch(
    2798           5 :                 &limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2799           5 :         return true;
    2800          64 : }
    2801             : 
    2802             : static inline void
    2803           5 : bdev_qos_rw_rewind_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2804             : {
    2805           5 :         __atomic_add_fetch(&limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2806           5 : }
    2807             : 
    2808             : static bool
    2809          23 : bdev_qos_rw_iops_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2810             : {
    2811          23 :         return bdev_qos_rw_queue_io(limit, io, 1);
    2812             : }
    2813             : 
    2814             : static void
    2815           3 : bdev_qos_rw_iops_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2816             : {
    2817           3 :         bdev_qos_rw_rewind_io(limit, io, 1);
    2818           3 : }
    2819             : 
    2820             : static bool
    2821          41 : bdev_qos_rw_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2822             : {
    2823          41 :         return bdev_qos_rw_queue_io(limit, io, bdev_get_io_size_in_byte(io));
    2824             : }
    2825             : 
    2826             : static void
    2827           2 : bdev_qos_rw_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2828             : {
    2829           2 :         bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2830           2 : }
    2831             : 
    2832             : static bool
    2833          19 : bdev_qos_r_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2834             : {
    2835          19 :         if (bdev_is_read_io(io) == false) {
    2836           1 :                 return false;
    2837             :         }
    2838             : 
    2839          18 :         return bdev_qos_rw_bps_queue(limit, io);
    2840          19 : }
    2841             : 
    2842             : static void
    2843           0 : bdev_qos_r_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2844             : {
    2845           0 :         if (bdev_is_read_io(io) != false) {
    2846           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2847           0 :         }
    2848           0 : }
    2849             : 
    2850             : static bool
    2851          14 : bdev_qos_w_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2852             : {
    2853          14 :         if (bdev_is_read_io(io) == true) {
    2854          12 :                 return false;
    2855             :         }
    2856             : 
    2857           2 :         return bdev_qos_rw_bps_queue(limit, io);
    2858          14 : }
    2859             : 
    2860             : static void
    2861           0 : bdev_qos_w_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2862             : {
    2863           0 :         if (bdev_is_read_io(io) != true) {
    2864           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2865           0 :         }
    2866           0 : }
    2867             : 
    2868             : static void
    2869          10 : bdev_qos_set_ops(struct spdk_bdev_qos *qos)
    2870             : {
    2871             :         int i;
    2872             : 
    2873          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2874          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    2875          15 :                         qos->rate_limits[i].queue_io = NULL;
    2876          15 :                         continue;
    2877             :                 }
    2878             : 
    2879          25 :                 switch (i) {
    2880             :                 case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2881           9 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_iops_queue;
    2882           9 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_iops_rewind_quota;
    2883           9 :                         break;
    2884             :                 case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2885           7 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_bps_queue;
    2886           7 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_bps_rewind_quota;
    2887           7 :                         break;
    2888             :                 case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2889           5 :                         qos->rate_limits[i].queue_io = bdev_qos_r_bps_queue;
    2890           5 :                         qos->rate_limits[i].rewind_quota = bdev_qos_r_bps_rewind_quota;
    2891           5 :                         break;
    2892             :                 case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2893           4 :                         qos->rate_limits[i].queue_io = bdev_qos_w_bps_queue;
    2894           4 :                         qos->rate_limits[i].rewind_quota = bdev_qos_w_bps_rewind_quota;
    2895           4 :                         break;
    2896             :                 default:
    2897           0 :                         break;
    2898             :                 }
    2899          25 :         }
    2900          10 : }
    2901             : 
    2902             : static void
    2903           6 : _bdev_io_complete_in_submit(struct spdk_bdev_channel *bdev_ch,
    2904             :                             struct spdk_bdev_io *bdev_io,
    2905             :                             enum spdk_bdev_io_status status)
    2906             : {
    2907           6 :         bdev_io->internal.f.in_submit_request = true;
    2908           6 :         bdev_io_increment_outstanding(bdev_ch, bdev_ch->shared_resource);
    2909           6 :         spdk_bdev_io_complete(bdev_io, status);
    2910           6 :         bdev_io->internal.f.in_submit_request = false;
    2911           6 : }
    2912             : 
    2913             : static inline void
    2914         574 : bdev_io_do_submit(struct spdk_bdev_channel *bdev_ch, struct spdk_bdev_io *bdev_io)
    2915             : {
    2916         574 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2917         574 :         struct spdk_io_channel *ch = bdev_ch->channel;
    2918         574 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    2919             : 
    2920         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    2921          16 :                 struct spdk_bdev_mgmt_channel *mgmt_channel = shared_resource->mgmt_ch;
    2922          16 :                 struct spdk_bdev_io *bio_to_abort = bdev_io->u.abort.bio_to_abort;
    2923             : 
    2924          16 :                 if (bdev_abort_queued_io(&shared_resource->nomem_io, bio_to_abort) ||
    2925          16 :                     bdev_abort_buf_io(mgmt_channel, bio_to_abort)) {
    2926           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io,
    2927             :                                                     SPDK_BDEV_IO_STATUS_SUCCESS);
    2928           0 :                         return;
    2929             :                 }
    2930          16 :         }
    2931             : 
    2932         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE &&
    2933             :                           bdev_io->bdev->split_on_write_unit &&
    2934             :                           bdev_io->u.bdev.num_blocks < bdev_io->bdev->write_unit_size)) {
    2935           4 :                 SPDK_ERRLOG("IO num_blocks %lu does not match the write_unit_size %u\n",
    2936             :                             bdev_io->u.bdev.num_blocks, bdev_io->bdev->write_unit_size);
    2937           4 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    2938           4 :                 return;
    2939             :         }
    2940             : 
    2941         570 :         if (spdk_likely(TAILQ_EMPTY(&shared_resource->nomem_io))) {
    2942         527 :                 bdev_io_increment_outstanding(bdev_ch, shared_resource);
    2943         527 :                 bdev_io->internal.f.in_submit_request = true;
    2944         527 :                 bdev_submit_request(bdev, ch, bdev_io);
    2945         527 :                 bdev_io->internal.f.in_submit_request = false;
    2946         527 :         } else {
    2947          43 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_SUBMIT);
    2948          43 :                 if (shared_resource->nomem_threshold == 0 && shared_resource->io_outstanding == 0) {
    2949             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    2950             :                          * could trigger retry of queued IOs */
    2951           0 :                         bdev_shared_ch_retry_io(shared_resource);
    2952           0 :                 }
    2953             :         }
    2954         574 : }
    2955             : 
    2956             : static bool
    2957          25 : bdev_qos_queue_io(struct spdk_bdev_qos *qos, struct spdk_bdev_io *bdev_io)
    2958             : {
    2959             :         int i;
    2960             : 
    2961          25 :         if (bdev_qos_io_to_limit(bdev_io) == true) {
    2962         100 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2963          82 :                         if (!qos->rate_limits[i].queue_io) {
    2964           5 :                                 continue;
    2965             :                         }
    2966             : 
    2967         231 :                         if (qos->rate_limits[i].queue_io(&qos->rate_limits[i],
    2968         154 :                                                          bdev_io) == true) {
    2969          10 :                                 for (i -= 1; i >= 0 ; i--) {
    2970           5 :                                         if (!qos->rate_limits[i].queue_io) {
    2971           0 :                                                 continue;
    2972             :                                         }
    2973             : 
    2974           5 :                                         qos->rate_limits[i].rewind_quota(&qos->rate_limits[i], bdev_io);
    2975           5 :                                 }
    2976           5 :                                 return true;
    2977             :                         }
    2978          72 :                 }
    2979          18 :         }
    2980             : 
    2981          20 :         return false;
    2982          25 : }
    2983             : 
    2984             : static int
    2985          27 : bdev_qos_io_submit(struct spdk_bdev_channel *ch, struct spdk_bdev_qos *qos)
    2986             : {
    2987          27 :         struct spdk_bdev_io             *bdev_io = NULL, *tmp = NULL;
    2988          27 :         int                             submitted_ios = 0;
    2989             : 
    2990          52 :         TAILQ_FOREACH_SAFE(bdev_io, &ch->qos_queued_io, internal.link, tmp) {
    2991          25 :                 if (!bdev_qos_queue_io(qos, bdev_io)) {
    2992          20 :                         TAILQ_REMOVE(&ch->qos_queued_io, bdev_io, internal.link);
    2993          20 :                         bdev_io_do_submit(ch, bdev_io);
    2994             : 
    2995          20 :                         submitted_ios++;
    2996          20 :                 }
    2997          25 :         }
    2998             : 
    2999          27 :         return submitted_ios;
    3000             : }
    3001             : 
    3002             : static void
    3003           2 : bdev_queue_io_wait_with_cb(struct spdk_bdev_io *bdev_io, spdk_bdev_io_wait_cb cb_fn)
    3004             : {
    3005             :         int rc;
    3006             : 
    3007           2 :         bdev_io->internal.waitq_entry.bdev = bdev_io->bdev;
    3008           2 :         bdev_io->internal.waitq_entry.cb_fn = cb_fn;
    3009           2 :         bdev_io->internal.waitq_entry.cb_arg = bdev_io;
    3010           4 :         rc = spdk_bdev_queue_io_wait(bdev_io->bdev, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3011           2 :                                      &bdev_io->internal.waitq_entry);
    3012           2 :         if (rc != 0) {
    3013           0 :                 SPDK_ERRLOG("Queue IO failed, rc=%d\n", rc);
    3014           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3015           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3016           0 :         }
    3017           2 : }
    3018             : 
    3019             : static bool
    3020         621 : bdev_rw_should_split(struct spdk_bdev_io *bdev_io)
    3021             : {
    3022             :         uint32_t io_boundary;
    3023         621 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3024         621 :         uint32_t max_segment_size = bdev->max_segment_size;
    3025         621 :         uint32_t max_size = bdev->max_rw_size;
    3026         621 :         int max_segs = bdev->max_num_segments;
    3027             : 
    3028         621 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    3029          24 :                 io_boundary = bdev->write_unit_size;
    3030         621 :         } else if (bdev->split_on_optimal_io_boundary) {
    3031         168 :                 io_boundary = bdev->optimal_io_boundary;
    3032         168 :         } else {
    3033         429 :                 io_boundary = 0;
    3034             :         }
    3035             : 
    3036         621 :         if (spdk_likely(!io_boundary && !max_segs && !max_segment_size && !max_size)) {
    3037         243 :                 return false;
    3038             :         }
    3039             : 
    3040         378 :         if (io_boundary) {
    3041             :                 uint64_t start_stripe, end_stripe;
    3042             : 
    3043         192 :                 start_stripe = bdev_io->u.bdev.offset_blocks;
    3044         192 :                 end_stripe = start_stripe + bdev_io->u.bdev.num_blocks - 1;
    3045             :                 /* Avoid expensive div operations if possible.  These spdk_u32 functions are very cheap. */
    3046         192 :                 if (spdk_likely(spdk_u32_is_pow2(io_boundary))) {
    3047         192 :                         start_stripe >>= spdk_u32log2(io_boundary);
    3048         192 :                         end_stripe >>= spdk_u32log2(io_boundary);
    3049         192 :                 } else {
    3050           0 :                         start_stripe /= io_boundary;
    3051           0 :                         end_stripe /= io_boundary;
    3052             :                 }
    3053             : 
    3054         192 :                 if (start_stripe != end_stripe) {
    3055          75 :                         return true;
    3056             :                 }
    3057         117 :         }
    3058             : 
    3059         303 :         if (max_segs) {
    3060         150 :                 if (bdev_io->u.bdev.iovcnt > max_segs) {
    3061          15 :                         return true;
    3062             :                 }
    3063         135 :         }
    3064             : 
    3065         288 :         if (max_segment_size) {
    3066         470 :                 for (int i = 0; i < bdev_io->u.bdev.iovcnt; i++) {
    3067         346 :                         if (bdev_io->u.bdev.iovs[i].iov_len > max_segment_size) {
    3068          12 :                                 return true;
    3069             :                         }
    3070         334 :                 }
    3071         124 :         }
    3072             : 
    3073         276 :         if (max_size) {
    3074          52 :                 if (bdev_io->u.bdev.num_blocks > max_size) {
    3075           7 :                         return true;
    3076             :                 }
    3077          45 :         }
    3078             : 
    3079         269 :         return false;
    3080         621 : }
    3081             : 
    3082             : static bool
    3083          24 : bdev_unmap_should_split(struct spdk_bdev_io *bdev_io)
    3084             : {
    3085             :         uint32_t num_unmap_segments;
    3086             : 
    3087          24 :         if (!bdev_io->bdev->max_unmap || !bdev_io->bdev->max_unmap_segments) {
    3088           3 :                 return false;
    3089             :         }
    3090          21 :         num_unmap_segments = spdk_divide_round_up(bdev_io->u.bdev.num_blocks, bdev_io->bdev->max_unmap);
    3091          21 :         if (num_unmap_segments > bdev_io->bdev->max_unmap_segments) {
    3092           4 :                 return true;
    3093             :         }
    3094             : 
    3095          17 :         return false;
    3096          24 : }
    3097             : 
    3098             : static bool
    3099          37 : bdev_write_zeroes_should_split(struct spdk_bdev_io *bdev_io)
    3100             : {
    3101          37 :         if (!bdev_io->bdev->max_write_zeroes) {
    3102           4 :                 return false;
    3103             :         }
    3104             : 
    3105          33 :         if (bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_write_zeroes) {
    3106          10 :                 return true;
    3107             :         }
    3108             : 
    3109          23 :         return false;
    3110          37 : }
    3111             : 
    3112             : static bool
    3113          30 : bdev_copy_should_split(struct spdk_bdev_io *bdev_io)
    3114             : {
    3115          30 :         if (bdev_io->bdev->max_copy != 0 &&
    3116          25 :             bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_copy) {
    3117           6 :                 return true;
    3118             :         }
    3119             : 
    3120          24 :         return false;
    3121          30 : }
    3122             : 
    3123             : static bool
    3124         794 : bdev_io_should_split(struct spdk_bdev_io *bdev_io)
    3125             : {
    3126         794 :         switch (bdev_io->type) {
    3127             :         case SPDK_BDEV_IO_TYPE_READ:
    3128             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3129         621 :                 return bdev_rw_should_split(bdev_io);
    3130             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3131          24 :                 return bdev_unmap_should_split(bdev_io);
    3132             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3133          37 :                 return bdev_write_zeroes_should_split(bdev_io);
    3134             :         case SPDK_BDEV_IO_TYPE_COPY:
    3135          30 :                 return bdev_copy_should_split(bdev_io);
    3136             :         default:
    3137          82 :                 return false;
    3138             :         }
    3139         794 : }
    3140             : 
    3141             : static uint32_t
    3142         249 : _to_next_boundary(uint64_t offset, uint32_t boundary)
    3143             : {
    3144         249 :         return (boundary - (offset % boundary));
    3145             : }
    3146             : 
    3147             : static void bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
    3148             : 
    3149             : static void _bdev_rw_split(void *_bdev_io);
    3150             : 
    3151             : static void bdev_unmap_split(struct spdk_bdev_io *bdev_io);
    3152             : 
    3153             : static void
    3154           0 : _bdev_unmap_split(void *_bdev_io)
    3155             : {
    3156           0 :         return bdev_unmap_split((struct spdk_bdev_io *)_bdev_io);
    3157             : }
    3158             : 
    3159             : static void bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io);
    3160             : 
    3161             : static void
    3162           0 : _bdev_write_zeroes_split(void *_bdev_io)
    3163             : {
    3164           0 :         return bdev_write_zeroes_split((struct spdk_bdev_io *)_bdev_io);
    3165             : }
    3166             : 
    3167             : static void bdev_copy_split(struct spdk_bdev_io *bdev_io);
    3168             : 
    3169             : static void
    3170           0 : _bdev_copy_split(void *_bdev_io)
    3171             : {
    3172           0 :         return bdev_copy_split((struct spdk_bdev_io *)_bdev_io);
    3173             : }
    3174             : 
    3175             : static int
    3176         305 : bdev_io_split_submit(struct spdk_bdev_io *bdev_io, struct iovec *iov, int iovcnt, void *md_buf,
    3177             :                      uint64_t num_blocks, uint64_t *offset, uint64_t *remaining)
    3178             : {
    3179             :         int rc;
    3180             :         uint64_t current_offset, current_remaining, current_src_offset;
    3181             :         spdk_bdev_io_wait_cb io_wait_fn;
    3182             : 
    3183         305 :         current_offset = *offset;
    3184         305 :         current_remaining = *remaining;
    3185             : 
    3186         305 :         assert(bdev_io->internal.f.split);
    3187             : 
    3188         305 :         bdev_io->internal.split.outstanding++;
    3189             : 
    3190         305 :         io_wait_fn = _bdev_rw_split;
    3191         305 :         switch (bdev_io->type) {
    3192             :         case SPDK_BDEV_IO_TYPE_READ:
    3193         196 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3194         392 :                 rc = bdev_readv_blocks_with_md(bdev_io->internal.desc,
    3195         196 :                                                spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3196         196 :                                                iov, iovcnt, md_buf, current_offset,
    3197         196 :                                                num_blocks,
    3198         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3199         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3200             :                                                NULL,
    3201         196 :                                                bdev_io->u.bdev.dif_check_flags,
    3202         196 :                                                bdev_io_split_done, bdev_io);
    3203         196 :                 break;
    3204             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3205          50 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3206         100 :                 rc = bdev_writev_blocks_with_md(bdev_io->internal.desc,
    3207          50 :                                                 spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3208          50 :                                                 iov, iovcnt, md_buf, current_offset,
    3209          50 :                                                 num_blocks,
    3210          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3211          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3212             :                                                 NULL,
    3213          50 :                                                 bdev_io->u.bdev.dif_check_flags,
    3214          50 :                                                 bdev_io->u.bdev.nvme_cdw12.raw,
    3215          50 :                                                 bdev_io->u.bdev.nvme_cdw13.raw,
    3216          50 :                                                 bdev_io_split_done, bdev_io);
    3217          50 :                 break;
    3218             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3219          17 :                 io_wait_fn = _bdev_unmap_split;
    3220          34 :                 rc = spdk_bdev_unmap_blocks(bdev_io->internal.desc,
    3221          17 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3222          17 :                                             current_offset, num_blocks,
    3223          17 :                                             bdev_io_split_done, bdev_io);
    3224          17 :                 break;
    3225             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3226          23 :                 io_wait_fn = _bdev_write_zeroes_split;
    3227          46 :                 rc = spdk_bdev_write_zeroes_blocks(bdev_io->internal.desc,
    3228          23 :                                                    spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3229          23 :                                                    current_offset, num_blocks,
    3230          23 :                                                    bdev_io_split_done, bdev_io);
    3231          23 :                 break;
    3232             :         case SPDK_BDEV_IO_TYPE_COPY:
    3233          19 :                 io_wait_fn = _bdev_copy_split;
    3234          38 :                 current_src_offset = bdev_io->u.bdev.copy.src_offset_blocks +
    3235          19 :                                      (current_offset - bdev_io->u.bdev.offset_blocks);
    3236          38 :                 rc = spdk_bdev_copy_blocks(bdev_io->internal.desc,
    3237          19 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3238          19 :                                            current_offset, current_src_offset, num_blocks,
    3239          19 :                                            bdev_io_split_done, bdev_io);
    3240          19 :                 break;
    3241             :         default:
    3242           0 :                 assert(false);
    3243             :                 rc = -EINVAL;
    3244             :                 break;
    3245             :         }
    3246             : 
    3247         305 :         if (rc == 0) {
    3248         301 :                 current_offset += num_blocks;
    3249         301 :                 current_remaining -= num_blocks;
    3250         301 :                 bdev_io->internal.split.current_offset_blocks = current_offset;
    3251         301 :                 bdev_io->internal.split.remaining_num_blocks = current_remaining;
    3252         301 :                 *offset = current_offset;
    3253         301 :                 *remaining = current_remaining;
    3254         301 :         } else {
    3255           4 :                 bdev_io->internal.split.outstanding--;
    3256           4 :                 if (rc == -ENOMEM) {
    3257           4 :                         if (bdev_io->internal.split.outstanding == 0) {
    3258             :                                 /* No I/O is outstanding. Hence we should wait here. */
    3259           1 :                                 bdev_queue_io_wait_with_cb(bdev_io, io_wait_fn);
    3260           1 :                         }
    3261           4 :                 } else {
    3262           0 :                         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3263           0 :                         if (bdev_io->internal.split.outstanding == 0) {
    3264           0 :                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3265           0 :                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3266             :                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3267             :                                                   bdev_io->internal.ch->queue_depth);
    3268           0 :                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3269           0 :                         }
    3270             :                 }
    3271             :         }
    3272             : 
    3273         305 :         return rc;
    3274             : }
    3275             : 
    3276             : static void
    3277          67 : _bdev_rw_split(void *_bdev_io)
    3278             : {
    3279             :         struct iovec *parent_iov, *iov;
    3280          67 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    3281          67 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3282             :         uint64_t parent_offset, current_offset, remaining;
    3283             :         uint32_t parent_iov_offset, parent_iovcnt, parent_iovpos, child_iovcnt;
    3284             :         uint32_t to_next_boundary, to_next_boundary_bytes, to_last_block_bytes;
    3285             :         uint32_t iovcnt, iov_len, child_iovsize;
    3286             :         uint32_t blocklen;
    3287             :         uint32_t io_boundary;
    3288          67 :         uint32_t max_segment_size = bdev->max_segment_size;
    3289          67 :         uint32_t max_child_iovcnt = bdev->max_num_segments;
    3290          67 :         uint32_t max_size = bdev->max_rw_size;
    3291          67 :         void *md_buf = NULL;
    3292             :         int rc;
    3293             : 
    3294          67 :         blocklen = bdev_io_get_block_size(bdev_io);
    3295             : 
    3296          67 :         max_size = max_size ? max_size : UINT32_MAX;
    3297          67 :         max_segment_size = max_segment_size ? max_segment_size : UINT32_MAX;
    3298          67 :         max_child_iovcnt = max_child_iovcnt ? spdk_min(max_child_iovcnt, SPDK_BDEV_IO_NUM_CHILD_IOV) :
    3299             :                            SPDK_BDEV_IO_NUM_CHILD_IOV;
    3300             : 
    3301          67 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    3302           5 :                 io_boundary = bdev->write_unit_size;
    3303          67 :         } else if (bdev->split_on_optimal_io_boundary) {
    3304          40 :                 io_boundary = bdev->optimal_io_boundary;
    3305          40 :         } else {
    3306          22 :                 io_boundary = UINT32_MAX;
    3307             :         }
    3308             : 
    3309          67 :         assert(bdev_io->internal.f.split);
    3310             : 
    3311          67 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3312          67 :         current_offset = bdev_io->internal.split.current_offset_blocks;
    3313          67 :         parent_offset = bdev_io->u.bdev.offset_blocks;
    3314          67 :         parent_iov_offset = (current_offset - parent_offset) * blocklen;
    3315          67 :         parent_iovcnt = bdev_io->u.bdev.iovcnt;
    3316             : 
    3317         420 :         for (parent_iovpos = 0; parent_iovpos < parent_iovcnt; parent_iovpos++) {
    3318         420 :                 parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3319         420 :                 if (parent_iov_offset < parent_iov->iov_len) {
    3320          67 :                         break;
    3321             :                 }
    3322         353 :                 parent_iov_offset -= parent_iov->iov_len;
    3323         353 :         }
    3324             : 
    3325          67 :         child_iovcnt = 0;
    3326         573 :         while (remaining > 0 && parent_iovpos < parent_iovcnt &&
    3327         264 :                child_iovcnt < SPDK_BDEV_IO_NUM_CHILD_IOV) {
    3328         249 :                 to_next_boundary = _to_next_boundary(current_offset, io_boundary);
    3329         249 :                 to_next_boundary = spdk_min(remaining, to_next_boundary);
    3330         249 :                 to_next_boundary = spdk_min(max_size, to_next_boundary);
    3331         249 :                 to_next_boundary_bytes = to_next_boundary * blocklen;
    3332             : 
    3333         249 :                 iov = &bdev_io->child_iov[child_iovcnt];
    3334         249 :                 iovcnt = 0;
    3335             : 
    3336         249 :                 if (bdev_io->u.bdev.md_buf) {
    3337          48 :                         md_buf = (char *)bdev_io->u.bdev.md_buf +
    3338          24 :                                  (current_offset - parent_offset) * spdk_bdev_get_md_size(bdev);
    3339          24 :                 }
    3340             : 
    3341         249 :                 child_iovsize = spdk_min(SPDK_BDEV_IO_NUM_CHILD_IOV - child_iovcnt, max_child_iovcnt);
    3342        1810 :                 while (to_next_boundary_bytes > 0 && parent_iovpos < parent_iovcnt &&
    3343         836 :                        iovcnt < child_iovsize) {
    3344         725 :                         parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3345         725 :                         iov_len = parent_iov->iov_len - parent_iov_offset;
    3346             : 
    3347         725 :                         iov_len = spdk_min(iov_len, max_segment_size);
    3348         725 :                         iov_len = spdk_min(iov_len, to_next_boundary_bytes);
    3349         725 :                         to_next_boundary_bytes -= iov_len;
    3350             : 
    3351         725 :                         bdev_io->child_iov[child_iovcnt].iov_base = parent_iov->iov_base + parent_iov_offset;
    3352         725 :                         bdev_io->child_iov[child_iovcnt].iov_len = iov_len;
    3353             : 
    3354         725 :                         if (iov_len < parent_iov->iov_len - parent_iov_offset) {
    3355         183 :                                 parent_iov_offset += iov_len;
    3356         183 :                         } else {
    3357         542 :                                 parent_iovpos++;
    3358         542 :                                 parent_iov_offset = 0;
    3359             :                         }
    3360         725 :                         child_iovcnt++;
    3361         725 :                         iovcnt++;
    3362             :                 }
    3363             : 
    3364         249 :                 if (to_next_boundary_bytes > 0) {
    3365             :                         /* We had to stop this child I/O early because we ran out of
    3366             :                          * child_iov space or were limited by max_num_segments.
    3367             :                          * Ensure the iovs to be aligned with block size and
    3368             :                          * then adjust to_next_boundary before starting the
    3369             :                          * child I/O.
    3370             :                          */
    3371         111 :                         assert(child_iovcnt == SPDK_BDEV_IO_NUM_CHILD_IOV ||
    3372             :                                iovcnt == child_iovsize);
    3373         111 :                         to_last_block_bytes = to_next_boundary_bytes % blocklen;
    3374         111 :                         if (to_last_block_bytes != 0) {
    3375          24 :                                 uint32_t child_iovpos = child_iovcnt - 1;
    3376             :                                 /* don't decrease child_iovcnt when it equals to SPDK_BDEV_IO_NUM_CHILD_IOV
    3377             :                                  * so the loop will naturally end
    3378             :                                  */
    3379             : 
    3380          24 :                                 to_last_block_bytes = blocklen - to_last_block_bytes;
    3381          24 :                                 to_next_boundary_bytes += to_last_block_bytes;
    3382          53 :                                 while (to_last_block_bytes > 0 && iovcnt > 0) {
    3383          32 :                                         iov_len = spdk_min(to_last_block_bytes,
    3384             :                                                            bdev_io->child_iov[child_iovpos].iov_len);
    3385          32 :                                         bdev_io->child_iov[child_iovpos].iov_len -= iov_len;
    3386          32 :                                         if (bdev_io->child_iov[child_iovpos].iov_len == 0) {
    3387          15 :                                                 child_iovpos--;
    3388          15 :                                                 if (--iovcnt == 0) {
    3389             :                                                         /* If the child IO is less than a block size just return.
    3390             :                                                          * If the first child IO of any split round is less than
    3391             :                                                          * a block size, an error exit.
    3392             :                                                          */
    3393           3 :                                                         if (bdev_io->internal.split.outstanding == 0) {
    3394           1 :                                                                 SPDK_ERRLOG("The first child io was less than a block size\n");
    3395           1 :                                                                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3396           1 :                                                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3397           1 :                                                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3398             :                                                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3399             :                                                                                   bdev_io->internal.ch->queue_depth);
    3400           1 :                                                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3401           1 :                                                         }
    3402             : 
    3403           3 :                                                         return;
    3404             :                                                 }
    3405          12 :                                         }
    3406             : 
    3407          29 :                                         to_last_block_bytes -= iov_len;
    3408             : 
    3409          29 :                                         if (parent_iov_offset == 0) {
    3410          14 :                                                 parent_iovpos--;
    3411          14 :                                                 parent_iov_offset = bdev_io->u.bdev.iovs[parent_iovpos].iov_len;
    3412          14 :                                         }
    3413          29 :                                         parent_iov_offset -= iov_len;
    3414             :                                 }
    3415             : 
    3416          21 :                                 assert(to_last_block_bytes == 0);
    3417          21 :                         }
    3418         108 :                         to_next_boundary -= to_next_boundary_bytes / blocklen;
    3419         108 :                 }
    3420             : 
    3421         246 :                 rc = bdev_io_split_submit(bdev_io, iov, iovcnt, md_buf, to_next_boundary,
    3422             :                                           &current_offset, &remaining);
    3423         246 :                 if (spdk_unlikely(rc)) {
    3424           4 :                         return;
    3425             :                 }
    3426             :         }
    3427          67 : }
    3428             : 
    3429             : static void
    3430           3 : bdev_unmap_split(struct spdk_bdev_io *bdev_io)
    3431             : {
    3432             :         uint64_t offset, unmap_blocks, remaining, max_unmap_blocks;
    3433           3 :         uint32_t num_children_reqs = 0;
    3434             :         int rc;
    3435             : 
    3436           3 :         assert(bdev_io->internal.f.split);
    3437             : 
    3438           3 :         offset = bdev_io->internal.split.current_offset_blocks;
    3439           3 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3440           3 :         max_unmap_blocks = bdev_io->bdev->max_unmap * bdev_io->bdev->max_unmap_segments;
    3441             : 
    3442          20 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3443          17 :                 unmap_blocks = spdk_min(remaining, max_unmap_blocks);
    3444             : 
    3445          17 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, unmap_blocks,
    3446             :                                           &offset, &remaining);
    3447          17 :                 if (spdk_likely(rc == 0)) {
    3448          17 :                         num_children_reqs++;
    3449          17 :                 } else {
    3450           0 :                         return;
    3451             :                 }
    3452             :         }
    3453           3 : }
    3454             : 
    3455             : static void
    3456           6 : bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io)
    3457             : {
    3458             :         uint64_t offset, write_zeroes_blocks, remaining;
    3459           6 :         uint32_t num_children_reqs = 0;
    3460             :         int rc;
    3461             : 
    3462           6 :         assert(bdev_io->internal.f.split);
    3463             : 
    3464           6 :         offset = bdev_io->internal.split.current_offset_blocks;
    3465           6 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3466             : 
    3467          29 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3468          23 :                 write_zeroes_blocks = spdk_min(remaining, bdev_io->bdev->max_write_zeroes);
    3469             : 
    3470          23 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, write_zeroes_blocks,
    3471             :                                           &offset, &remaining);
    3472          23 :                 if (spdk_likely(rc == 0)) {
    3473          23 :                         num_children_reqs++;
    3474          23 :                 } else {
    3475           0 :                         return;
    3476             :                 }
    3477             :         }
    3478           6 : }
    3479             : 
    3480             : static void
    3481           4 : bdev_copy_split(struct spdk_bdev_io *bdev_io)
    3482             : {
    3483             :         uint64_t offset, copy_blocks, remaining;
    3484           4 :         uint32_t num_children_reqs = 0;
    3485             :         int rc;
    3486             : 
    3487           4 :         assert(bdev_io->internal.f.split);
    3488             : 
    3489           4 :         offset = bdev_io->internal.split.current_offset_blocks;
    3490           4 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3491             : 
    3492           4 :         assert(bdev_io->bdev->max_copy != 0);
    3493          23 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_COPY_REQS)) {
    3494          19 :                 copy_blocks = spdk_min(remaining, bdev_io->bdev->max_copy);
    3495             : 
    3496          19 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, copy_blocks,
    3497             :                                           &offset, &remaining);
    3498          19 :                 if (spdk_likely(rc == 0)) {
    3499          19 :                         num_children_reqs++;
    3500          19 :                 } else {
    3501           0 :                         return;
    3502             :                 }
    3503             :         }
    3504           4 : }
    3505             : 
    3506             : static void
    3507          58 : parent_bdev_io_complete(void *ctx, int rc)
    3508             : {
    3509          58 :         struct spdk_bdev_io *parent_io = ctx;
    3510             : 
    3511          58 :         if (rc) {
    3512           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3513           0 :         }
    3514             : 
    3515         116 :         parent_io->internal.cb(parent_io, parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    3516          58 :                                parent_io->internal.caller_ctx);
    3517          58 : }
    3518             : 
    3519             : static void
    3520           0 : bdev_io_complete_parent_sequence_cb(void *ctx, int status)
    3521             : {
    3522           0 :         struct spdk_bdev_io *bdev_io = ctx;
    3523             : 
    3524             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    3525           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    3526           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    3527           0 :         bdev_io->internal.f.has_accel_sequence = false;
    3528             : 
    3529           0 :         if (spdk_unlikely(status != 0)) {
    3530           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    3531           0 :         }
    3532             : 
    3533           0 :         parent_bdev_io_complete(bdev_io, status);
    3534           0 : }
    3535             : 
    3536             : static void
    3537         301 : bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    3538             : {
    3539         301 :         struct spdk_bdev_io *parent_io = cb_arg;
    3540             : 
    3541         301 :         spdk_bdev_free_io(bdev_io);
    3542             : 
    3543         301 :         assert(parent_io->internal.f.split);
    3544             : 
    3545         301 :         if (!success) {
    3546          21 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3547             :                 /* If any child I/O failed, stop further splitting process. */
    3548          21 :                 parent_io->internal.split.current_offset_blocks += parent_io->internal.split.remaining_num_blocks;
    3549          21 :                 parent_io->internal.split.remaining_num_blocks = 0;
    3550          21 :         }
    3551         301 :         parent_io->internal.split.outstanding--;
    3552         301 :         if (parent_io->internal.split.outstanding != 0) {
    3553         223 :                 return;
    3554             :         }
    3555             : 
    3556             :         /*
    3557             :          * Parent I/O finishes when all blocks are consumed.
    3558             :          */
    3559          78 :         if (parent_io->internal.split.remaining_num_blocks == 0) {
    3560          58 :                 assert(parent_io->internal.cb != bdev_io_split_done);
    3561          58 :                 bdev_ch_remove_from_io_submitted(parent_io);
    3562          58 :                 spdk_trace_record(TRACE_BDEV_IO_DONE, parent_io->internal.ch->trace_id,
    3563             :                                   0, (uintptr_t)parent_io, bdev_io->internal.caller_ctx,
    3564             :                                   parent_io->internal.ch->queue_depth);
    3565             : 
    3566          58 :                 if (spdk_likely(parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    3567          48 :                         if (bdev_io_needs_sequence_exec(parent_io->internal.desc, parent_io)) {
    3568           0 :                                 bdev_io_exec_sequence(parent_io, bdev_io_complete_parent_sequence_cb);
    3569           0 :                                 return;
    3570          48 :                         } else if (parent_io->internal.f.has_bounce_buf &&
    3571           0 :                                    !bdev_io_use_accel_sequence(bdev_io)) {
    3572             :                                 /* bdev IO will be completed in the callback */
    3573           0 :                                 _bdev_io_push_bounce_data_buffer(parent_io, parent_bdev_io_complete);
    3574           0 :                                 return;
    3575             :                         }
    3576          48 :                 }
    3577             : 
    3578          58 :                 parent_bdev_io_complete(parent_io, 0);
    3579          58 :                 return;
    3580             :         }
    3581             : 
    3582             :         /*
    3583             :          * Continue with the splitting process.  This function will complete the parent I/O if the
    3584             :          * splitting is done.
    3585             :          */
    3586          20 :         switch (parent_io->type) {
    3587             :         case SPDK_BDEV_IO_TYPE_READ:
    3588             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3589          17 :                 _bdev_rw_split(parent_io);
    3590          17 :                 break;
    3591             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3592           1 :                 bdev_unmap_split(parent_io);
    3593           1 :                 break;
    3594             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3595           1 :                 bdev_write_zeroes_split(parent_io);
    3596           1 :                 break;
    3597             :         case SPDK_BDEV_IO_TYPE_COPY:
    3598           1 :                 bdev_copy_split(parent_io);
    3599           1 :                 break;
    3600             :         default:
    3601           0 :                 assert(false);
    3602             :                 break;
    3603             :         }
    3604         301 : }
    3605             : 
    3606             : static void bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3607             :                                      bool success);
    3608             : 
    3609             : static void
    3610          59 : bdev_io_split(struct spdk_bdev_io *bdev_io)
    3611             : {
    3612          59 :         assert(bdev_io_should_split(bdev_io));
    3613          59 :         assert(bdev_io->internal.f.split);
    3614             : 
    3615          59 :         bdev_io->internal.split.current_offset_blocks = bdev_io->u.bdev.offset_blocks;
    3616          59 :         bdev_io->internal.split.remaining_num_blocks = bdev_io->u.bdev.num_blocks;
    3617          59 :         bdev_io->internal.split.outstanding = 0;
    3618          59 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    3619             : 
    3620          59 :         switch (bdev_io->type) {
    3621             :         case SPDK_BDEV_IO_TYPE_READ:
    3622             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3623          49 :                 if (_is_buf_allocated(bdev_io->u.bdev.iovs)) {
    3624          49 :                         _bdev_rw_split(bdev_io);
    3625          49 :                 } else {
    3626           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3627           0 :                         spdk_bdev_io_get_buf(bdev_io, bdev_rw_split_get_buf_cb,
    3628           0 :                                              bdev_io->u.bdev.num_blocks * bdev_io_get_block_size(bdev_io));
    3629             :                 }
    3630          49 :                 break;
    3631             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3632           2 :                 bdev_unmap_split(bdev_io);
    3633           2 :                 break;
    3634             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3635           5 :                 bdev_write_zeroes_split(bdev_io);
    3636           5 :                 break;
    3637             :         case SPDK_BDEV_IO_TYPE_COPY:
    3638           3 :                 bdev_copy_split(bdev_io);
    3639           3 :                 break;
    3640             :         default:
    3641           0 :                 assert(false);
    3642             :                 break;
    3643             :         }
    3644          59 : }
    3645             : 
    3646             : static void
    3647           0 : bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
    3648             : {
    3649           0 :         if (!success) {
    3650           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3651           0 :                 return;
    3652             :         }
    3653             : 
    3654           0 :         _bdev_rw_split(bdev_io);
    3655           0 : }
    3656             : 
    3657             : static inline void
    3658         579 : _bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3659             : {
    3660         579 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3661         579 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3662             : 
    3663         579 :         if (spdk_likely(bdev_ch->flags == 0)) {
    3664         554 :                 bdev_io_do_submit(bdev_ch, bdev_io);
    3665         554 :                 return;
    3666             :         }
    3667             : 
    3668          25 :         if (bdev_ch->flags & BDEV_CH_RESET_IN_PROGRESS) {
    3669           2 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    3670          25 :         } else if (bdev_ch->flags & BDEV_CH_QOS_ENABLED) {
    3671          23 :                 if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT) &&
    3672           2 :                     bdev_abort_queued_io(&bdev_ch->qos_queued_io, bdev_io->u.abort.bio_to_abort)) {
    3673           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    3674           0 :                 } else {
    3675          23 :                         TAILQ_INSERT_TAIL(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    3676          23 :                         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    3677             :                 }
    3678          23 :         } else {
    3679           0 :                 SPDK_ERRLOG("unknown bdev_ch flag %x found\n", bdev_ch->flags);
    3680           0 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3681             :         }
    3682         579 : }
    3683             : 
    3684             : bool bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2);
    3685             : 
    3686             : bool
    3687          23 : bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2)
    3688             : {
    3689          23 :         if (range1->length == 0 || range2->length == 0) {
    3690           1 :                 return false;
    3691             :         }
    3692             : 
    3693          22 :         if (range1->offset + range1->length <= range2->offset) {
    3694           1 :                 return false;
    3695             :         }
    3696             : 
    3697          21 :         if (range2->offset + range2->length <= range1->offset) {
    3698           3 :                 return false;
    3699             :         }
    3700             : 
    3701          18 :         return true;
    3702          23 : }
    3703             : 
    3704             : static bool
    3705          11 : bdev_io_range_is_locked(struct spdk_bdev_io *bdev_io, struct lba_range *range)
    3706             : {
    3707          11 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3708             :         struct lba_range r;
    3709             : 
    3710          11 :         switch (bdev_io->type) {
    3711             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3712             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3713             :                 /* Don't try to decode the NVMe command - just assume worst-case and that
    3714             :                  * it overlaps a locked range.
    3715             :                  */
    3716           0 :                 return true;
    3717             :         case SPDK_BDEV_IO_TYPE_READ:
    3718           6 :                 if (!range->quiesce) {
    3719           4 :                         return false;
    3720             :                 }
    3721             :         /* fallthrough */
    3722             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3723             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3724             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3725             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    3726             :         case SPDK_BDEV_IO_TYPE_COPY:
    3727           7 :                 r.offset = bdev_io->u.bdev.offset_blocks;
    3728           7 :                 r.length = bdev_io->u.bdev.num_blocks;
    3729           7 :                 if (!bdev_lba_range_overlapped(range, &r)) {
    3730             :                         /* This I/O doesn't overlap the specified LBA range. */
    3731           0 :                         return false;
    3732           7 :                 } else if (range->owner_ch == ch && range->locked_ctx == bdev_io->internal.caller_ctx) {
    3733             :                         /* This I/O overlaps, but the I/O is on the same channel that locked this
    3734             :                          * range, and the caller_ctx is the same as the locked_ctx.  This means
    3735             :                          * that this I/O is associated with the lock, and is allowed to execute.
    3736             :                          */
    3737           2 :                         return false;
    3738             :                 } else {
    3739           5 :                         return true;
    3740             :                 }
    3741             :         default:
    3742           0 :                 return false;
    3743             :         }
    3744          11 : }
    3745             : 
    3746             : void
    3747         639 : bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3748             : {
    3749         639 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3750             : 
    3751         639 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3752             : 
    3753         639 :         if (!TAILQ_EMPTY(&ch->locked_ranges)) {
    3754             :                 struct lba_range *range;
    3755             : 
    3756          13 :                 TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
    3757           8 :                         if (bdev_io_range_is_locked(bdev_io, range)) {
    3758           3 :                                 TAILQ_INSERT_TAIL(&ch->io_locked, bdev_io, internal.ch_link);
    3759           3 :                                 return;
    3760             :                         }
    3761           5 :                 }
    3762           5 :         }
    3763             : 
    3764         636 :         bdev_ch_add_to_io_submitted(bdev_io);
    3765             : 
    3766         636 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    3767         636 :         spdk_trace_record_tsc(bdev_io->internal.submit_tsc, TRACE_BDEV_IO_START,
    3768             :                               ch->trace_id, bdev_io->u.bdev.num_blocks,
    3769             :                               (uintptr_t)bdev_io, (uint64_t)bdev_io->type, bdev_io->internal.caller_ctx,
    3770             :                               bdev_io->u.bdev.offset_blocks, ch->queue_depth);
    3771             : 
    3772         636 :         if (bdev_io->internal.f.split) {
    3773          59 :                 bdev_io_split(bdev_io);
    3774          59 :                 return;
    3775             :         }
    3776             : 
    3777         577 :         _bdev_io_submit(bdev_io);
    3778         639 : }
    3779             : 
    3780             : static inline int
    3781           2 : bdev_io_init_dif_ctx(struct spdk_bdev_io *bdev_io)
    3782             : {
    3783           2 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3784             :         struct spdk_dif_ctx_init_ext_opts dif_opts;
    3785             : 
    3786           2 :         memset(&bdev_io->u.bdev.dif_err, 0, sizeof(struct spdk_dif_error));
    3787             : 
    3788           2 :         dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
    3789           2 :         dif_opts.dif_pi_format = bdev->dif_pi_format;
    3790             : 
    3791           4 :         return spdk_dif_ctx_init(&bdev_io->u.bdev.dif_ctx,
    3792           2 :                                  bdev->blocklen,
    3793           2 :                                  bdev->md_len,
    3794           2 :                                  bdev->md_interleave,
    3795           2 :                                  bdev->dif_is_head_of_md,
    3796           2 :                                  bdev->dif_type,
    3797           2 :                                  bdev_io->u.bdev.dif_check_flags,
    3798           2 :                                  bdev_io->u.bdev.offset_blocks & 0xFFFFFFFF,
    3799             :                                  0xFFFF, 0, 0, 0, &dif_opts);
    3800             : }
    3801             : 
    3802             : static void
    3803           4 : _bdev_memory_domain_get_io_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3804             :                               bool success)
    3805             : {
    3806           4 :         if (!success) {
    3807           0 :                 SPDK_ERRLOG("Failed to get data buffer, completing IO\n");
    3808           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3809           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    3810           0 :                 return;
    3811             :         }
    3812             : 
    3813           4 :         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    3814           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    3815           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    3816           0 :                         return;
    3817             :                 }
    3818             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    3819             :                  * clear out accel_sequence pointer and submit the IO */
    3820           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3821           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    3822           0 :         }
    3823             : 
    3824           4 :         bdev_io_submit(bdev_io);
    3825           4 : }
    3826             : 
    3827             : static inline void
    3828           4 : _bdev_io_ext_use_bounce_buffer(struct spdk_bdev_io *bdev_io)
    3829             : {
    3830             :         /* bdev doesn't support memory domains, thereby buffers in this IO request can't
    3831             :          * be accessed directly. It is needed to allocate buffers before issuing IO operation.
    3832             :          * For write operation we need to pull buffers from memory domain before submitting IO.
    3833             :          * Once read operation completes, we need to use memory_domain push functionality to
    3834             :          * update data in original memory domain IO buffer.
    3835             :          *
    3836             :          * If this I/O request is not aware of metadata, buffers in thsi IO request can't be
    3837             :          * accessed directly too. It is needed to allocate buffers before issuing IO operation.
    3838             :          * For write operation we need to insert metadata before submitting IO. Once read
    3839             :          * operation completes, we need to strip metadata in original IO buffer.
    3840             :          *
    3841             :          * This IO request will go through a regular IO flow, so clear memory domains pointers */
    3842           4 :         assert(bdev_io_use_memory_domain(bdev_io) ||
    3843             :                bdev_io_needs_metadata(bdev_io->internal.desc, bdev_io));
    3844             : 
    3845           4 :         bdev_io->u.bdev.memory_domain = NULL;
    3846           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    3847           8 :         _bdev_io_get_bounce_buf(bdev_io, _bdev_memory_domain_get_io_cb,
    3848           4 :                                 bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
    3849           4 : }
    3850             : 
    3851             : static inline void
    3852           0 : _bdev_io_ext_use_accel_buffer(struct spdk_bdev_io *bdev_io)
    3853             : {
    3854           0 :         assert(bdev_io_use_memory_domain(bdev_io));
    3855           0 :         assert(bdev_io_needs_metadata(bdev_io->internal.desc, bdev_io));
    3856             : 
    3857           0 :         bdev_io->u.bdev.memory_domain = NULL;
    3858           0 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    3859           0 :         bdev_io_get_accel_buf(bdev_io, _bdev_memory_domain_get_io_cb,
    3860           0 :                               bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
    3861           0 : }
    3862             : 
    3863             : /* We need to allocate bounce buffer
    3864             :  * - if bdev doesn't support memory domains,
    3865             :  * -  if it does support them, but we need to execute an accel sequence and the data buffer is
    3866             :  *    from accel memory domain (to avoid doing a push/pull from that domain), or
    3867             :  * - if IO is not aware of metadata.
    3868             :  */
    3869             : static inline bool
    3870         292 : bdev_io_needs_bounce_buffer(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3871             : {
    3872         292 :         if (bdev_io_use_memory_domain(bdev_io)) {
    3873           4 :                 if (!desc->memory_domains_supported ||
    3874           0 :                     (bdev_io_needs_sequence_exec(desc, bdev_io) &&
    3875           0 :                      (bdev_io->internal.memory_domain == spdk_accel_get_memory_domain() ||
    3876           0 :                       bdev_io_needs_metadata(desc, bdev_io)))) {
    3877           4 :                         return true;
    3878             :                 }
    3879             : 
    3880           0 :                 return false;
    3881             :         }
    3882             : 
    3883         288 :         if (bdev_io_needs_metadata(desc, bdev_io)) {
    3884           0 :                 return true;
    3885             :         }
    3886             : 
    3887         288 :         return false;
    3888         292 : }
    3889             : 
    3890             : /* We need to allocate fake accel buffer if bdev supports memory domains but IO is not
    3891             :  * aware of metadata.
    3892             :  */
    3893             : static inline bool
    3894         288 : bdev_io_needs_accel_buffer(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3895             : {
    3896         288 :         if (bdev_io_needs_metadata(desc, bdev_io)) {
    3897           0 :                 assert(bdev_io_use_memory_domain(bdev_io));
    3898           0 :                 return true;
    3899             :         }
    3900             : 
    3901         288 :         return false;
    3902         288 : }
    3903             : 
    3904             : static inline void
    3905         292 : _bdev_io_submit_ext(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3906             : {
    3907         292 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3908             :         int rc;
    3909             : 
    3910         292 :         if (spdk_unlikely(ch->flags & BDEV_CH_RESET_IN_PROGRESS)) {
    3911           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_ABORTED;
    3912           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    3913           0 :                 return;
    3914             :         }
    3915             : 
    3916         292 :         if (bdev_io_needs_metadata(desc, bdev_io)) {
    3917           0 :                 rc = bdev_io_init_dif_ctx(bdev_io);
    3918           0 :                 if (spdk_unlikely(rc != 0)) {
    3919           0 :                         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3920           0 :                         bdev_io_complete_unsubmitted(bdev_io);
    3921           0 :                         return;
    3922             :                 }
    3923           0 :         }
    3924             : 
    3925         292 :         if (bdev_io_needs_bounce_buffer(desc, bdev_io)) {
    3926           4 :                 _bdev_io_ext_use_bounce_buffer(bdev_io);
    3927           4 :                 return;
    3928             :         }
    3929             : 
    3930         288 :         if (bdev_io_needs_accel_buffer(desc, bdev_io)) {
    3931           0 :                 _bdev_io_ext_use_accel_buffer(bdev_io);
    3932           0 :                 return;
    3933             :         }
    3934             : 
    3935         288 :         if (bdev_io_needs_sequence_exec(desc, bdev_io)) {
    3936           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    3937           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    3938           0 :                         return;
    3939             :                 }
    3940             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    3941             :                  * clear out accel_sequence pointer and submit the IO */
    3942           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3943           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    3944           0 :         }
    3945             : 
    3946         288 :         bdev_io_submit(bdev_io);
    3947         292 : }
    3948             : 
    3949             : static void
    3950          12 : bdev_io_submit_reset(struct spdk_bdev_io *bdev_io)
    3951             : {
    3952          12 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3953          12 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3954          12 :         struct spdk_io_channel *ch = bdev_ch->channel;
    3955             : 
    3956          12 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3957             : 
    3958          12 :         bdev_io->internal.f.in_submit_request = true;
    3959          12 :         bdev_submit_request(bdev, ch, bdev_io);
    3960          12 :         bdev_io->internal.f.in_submit_request = false;
    3961          12 : }
    3962             : 
    3963             : void
    3964         693 : bdev_io_init(struct spdk_bdev_io *bdev_io,
    3965             :              struct spdk_bdev *bdev, void *cb_arg,
    3966             :              spdk_bdev_io_completion_cb cb)
    3967             : {
    3968         693 :         bdev_io->bdev = bdev;
    3969         693 :         bdev_io->internal.f.raw = 0;
    3970         693 :         bdev_io->internal.caller_ctx = cb_arg;
    3971         693 :         bdev_io->internal.cb = cb;
    3972         693 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    3973         693 :         bdev_io->internal.f.in_submit_request = false;
    3974         693 :         bdev_io->internal.error.nvme.cdw0 = 0;
    3975         693 :         bdev_io->num_retries = 0;
    3976         693 :         bdev_io->internal.get_buf_cb = NULL;
    3977         693 :         bdev_io->internal.get_aux_buf_cb = NULL;
    3978         693 :         bdev_io->internal.data_transfer_cpl = NULL;
    3979         693 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    3980         693 : }
    3981             : 
    3982             : static bool
    3983         540 : bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3984             : {
    3985         540 :         return bdev->fn_table->io_type_supported(bdev->ctxt, io_type);
    3986             : }
    3987             : 
    3988             : bool
    3989         178 : spdk_bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3990             : {
    3991             :         bool supported;
    3992             : 
    3993         178 :         supported = bdev_io_type_supported(bdev, io_type);
    3994             : 
    3995         178 :         if (!supported) {
    3996           7 :                 switch (io_type) {
    3997             :                 case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3998             :                         /* The bdev layer will emulate write zeroes as long as write is supported. */
    3999           0 :                         supported = bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE);
    4000           0 :                         break;
    4001             :                 default:
    4002           7 :                         break;
    4003             :                 }
    4004           7 :         }
    4005             : 
    4006         178 :         return supported;
    4007             : }
    4008             : 
    4009             : static const char *g_io_type_strings[] = {
    4010             :         [SPDK_BDEV_IO_TYPE_READ] = "read",
    4011             :         [SPDK_BDEV_IO_TYPE_WRITE] = "write",
    4012             :         [SPDK_BDEV_IO_TYPE_UNMAP] = "unmap",
    4013             :         [SPDK_BDEV_IO_TYPE_FLUSH] = "flush",
    4014             :         [SPDK_BDEV_IO_TYPE_RESET] = "reset",
    4015             :         [SPDK_BDEV_IO_TYPE_NVME_ADMIN] = "nvme_admin",
    4016             :         [SPDK_BDEV_IO_TYPE_NVME_IO] = "nvme_io",
    4017             :         [SPDK_BDEV_IO_TYPE_NVME_IO_MD] = "nvme_io_md",
    4018             :         [SPDK_BDEV_IO_TYPE_WRITE_ZEROES] = "write_zeroes",
    4019             :         [SPDK_BDEV_IO_TYPE_ZCOPY] = "zcopy",
    4020             :         [SPDK_BDEV_IO_TYPE_GET_ZONE_INFO] = "get_zone_info",
    4021             :         [SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT] = "zone_management",
    4022             :         [SPDK_BDEV_IO_TYPE_ZONE_APPEND] = "zone_append",
    4023             :         [SPDK_BDEV_IO_TYPE_COMPARE] = "compare",
    4024             :         [SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE] = "compare_and_write",
    4025             :         [SPDK_BDEV_IO_TYPE_ABORT] = "abort",
    4026             :         [SPDK_BDEV_IO_TYPE_SEEK_HOLE] = "seek_hole",
    4027             :         [SPDK_BDEV_IO_TYPE_SEEK_DATA] = "seek_data",
    4028             :         [SPDK_BDEV_IO_TYPE_COPY] = "copy",
    4029             :         [SPDK_BDEV_IO_TYPE_NVME_IOV_MD] = "nvme_iov_md",
    4030             : };
    4031             : 
    4032             : const char *
    4033           0 : spdk_bdev_get_io_type_name(enum spdk_bdev_io_type io_type)
    4034             : {
    4035           0 :         if (io_type <= SPDK_BDEV_IO_TYPE_INVALID || io_type >= SPDK_BDEV_NUM_IO_TYPES) {
    4036           0 :                 return NULL;
    4037             :         }
    4038             : 
    4039           0 :         return g_io_type_strings[io_type];
    4040           0 : }
    4041             : 
    4042             : int
    4043           0 : spdk_bdev_get_io_type(const char *io_type_string)
    4044             : {
    4045             :         int i;
    4046             : 
    4047           0 :         for (i = SPDK_BDEV_IO_TYPE_READ; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    4048           0 :                 if (!strcmp(io_type_string, g_io_type_strings[i])) {
    4049           0 :                         return i;
    4050             :                 }
    4051           0 :         }
    4052             : 
    4053           0 :         return -1;
    4054           0 : }
    4055             : 
    4056             : uint64_t
    4057           0 : spdk_bdev_io_get_submit_tsc(struct spdk_bdev_io *bdev_io)
    4058             : {
    4059           0 :         return bdev_io->internal.submit_tsc;
    4060             : }
    4061             : 
    4062             : bool
    4063           0 : spdk_bdev_io_hide_metadata(struct spdk_bdev_io *bdev_io)
    4064             : {
    4065           0 :         return bdev_io->internal.desc->opts.hide_metadata;
    4066             : }
    4067             : 
    4068             : int
    4069           0 : spdk_bdev_dump_info_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    4070             : {
    4071           0 :         if (bdev->fn_table->dump_info_json) {
    4072           0 :                 return bdev->fn_table->dump_info_json(bdev->ctxt, w);
    4073             :         }
    4074             : 
    4075           0 :         return 0;
    4076           0 : }
    4077             : 
    4078             : static void
    4079          10 : bdev_qos_update_max_quota_per_timeslice(struct spdk_bdev_qos *qos)
    4080             : {
    4081          10 :         uint32_t max_per_timeslice = 0;
    4082             :         int i;
    4083             : 
    4084          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4085          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    4086          15 :                         qos->rate_limits[i].max_per_timeslice = 0;
    4087          15 :                         continue;
    4088             :                 }
    4089             : 
    4090          50 :                 max_per_timeslice = qos->rate_limits[i].limit *
    4091          25 :                                     SPDK_BDEV_QOS_TIMESLICE_IN_USEC / SPDK_SEC_TO_USEC;
    4092             : 
    4093          25 :                 qos->rate_limits[i].max_per_timeslice = spdk_max(max_per_timeslice,
    4094             :                                                         qos->rate_limits[i].min_per_timeslice);
    4095             : 
    4096          50 :                 __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    4097          25 :                                  qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELEASE);
    4098          25 :         }
    4099             : 
    4100          10 :         bdev_qos_set_ops(qos);
    4101          10 : }
    4102             : 
    4103             : static void
    4104           4 : bdev_channel_submit_qos_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    4105             :                            struct spdk_io_channel *io_ch, void *ctx)
    4106             : {
    4107           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    4108             :         int status;
    4109             : 
    4110           4 :         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    4111             : 
    4112             :         /* if all IOs were sent then continue the iteration, otherwise - stop it */
    4113             :         /* TODO: channels round robing */
    4114           4 :         status = TAILQ_EMPTY(&bdev_ch->qos_queued_io) ? 0 : 1;
    4115             : 
    4116           4 :         spdk_bdev_for_each_channel_continue(i, status);
    4117           4 : }
    4118             : 
    4119             : 
    4120             : static void
    4121           2 : bdev_channel_submit_qos_io_done(struct spdk_bdev *bdev, void *ctx, int status)
    4122             : {
    4123             : 
    4124           2 : }
    4125             : 
    4126             : static int
    4127           3 : bdev_channel_poll_qos(void *arg)
    4128             : {
    4129           3 :         struct spdk_bdev *bdev = arg;
    4130           3 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    4131           3 :         uint64_t now = spdk_get_ticks();
    4132             :         int i;
    4133             :         int64_t remaining_last_timeslice;
    4134             : 
    4135           3 :         if (spdk_unlikely(qos->thread == NULL)) {
    4136             :                 /* Old QoS was unbound to remove and new QoS is not enabled yet. */
    4137           1 :                 return SPDK_POLLER_IDLE;
    4138             :         }
    4139             : 
    4140           2 :         if (now < (qos->last_timeslice + qos->timeslice_size)) {
    4141             :                 /* We received our callback earlier than expected - return
    4142             :                  *  immediately and wait to do accounting until at least one
    4143             :                  *  timeslice has actually expired.  This should never happen
    4144             :                  *  with a well-behaved timer implementation.
    4145             :                  */
    4146           0 :                 return SPDK_POLLER_IDLE;
    4147             :         }
    4148             : 
    4149             :         /* Reset for next round of rate limiting */
    4150          10 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4151             :                 /* We may have allowed the IOs or bytes to slightly overrun in the last
    4152             :                  * timeslice. remaining_this_timeslice is signed, so if it's negative
    4153             :                  * here, we'll account for the overrun so that the next timeslice will
    4154             :                  * be appropriately reduced.
    4155             :                  */
    4156           8 :                 remaining_last_timeslice = __atomic_exchange_n(&qos->rate_limits[i].remaining_this_timeslice,
    4157             :                                            0, __ATOMIC_RELAXED);
    4158           8 :                 if (remaining_last_timeslice < 0) {
    4159             :                         /* There could be a race condition here as both bdev_qos_rw_queue_io() and bdev_channel_poll_qos()
    4160             :                          * potentially use 2 atomic ops each, so they can intertwine.
    4161             :                          * This race can potentially cause the limits to be a little fuzzy but won't cause any real damage.
    4162             :                          */
    4163           0 :                         __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    4164           0 :                                          remaining_last_timeslice, __ATOMIC_RELAXED);
    4165           0 :                 }
    4166           8 :         }
    4167             : 
    4168           4 :         while (now >= (qos->last_timeslice + qos->timeslice_size)) {
    4169           2 :                 qos->last_timeslice += qos->timeslice_size;
    4170          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4171          16 :                         __atomic_add_fetch(&qos->rate_limits[i].remaining_this_timeslice,
    4172           8 :                                            qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELAXED);
    4173           8 :                 }
    4174             :         }
    4175             : 
    4176           2 :         spdk_bdev_for_each_channel(bdev, bdev_channel_submit_qos_io, qos,
    4177             :                                    bdev_channel_submit_qos_io_done);
    4178             : 
    4179           2 :         return SPDK_POLLER_BUSY;
    4180           3 : }
    4181             : 
    4182             : static void
    4183          75 : bdev_channel_destroy_resource(struct spdk_bdev_channel *ch)
    4184             : {
    4185             :         struct spdk_bdev_shared_resource *shared_resource;
    4186             :         struct lba_range *range;
    4187             : 
    4188          75 :         bdev_free_io_stat(ch->stat);
    4189             : #ifdef SPDK_CONFIG_VTUNE
    4190             :         bdev_free_io_stat(ch->prev_stat);
    4191             : #endif
    4192             : 
    4193          75 :         while (!TAILQ_EMPTY(&ch->locked_ranges)) {
    4194           0 :                 range = TAILQ_FIRST(&ch->locked_ranges);
    4195           0 :                 TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
    4196           0 :                 free(range);
    4197             :         }
    4198             : 
    4199          75 :         spdk_put_io_channel(ch->channel);
    4200          75 :         spdk_put_io_channel(ch->accel_channel);
    4201             : 
    4202          75 :         shared_resource = ch->shared_resource;
    4203             : 
    4204          75 :         assert(TAILQ_EMPTY(&ch->io_locked));
    4205          75 :         assert(TAILQ_EMPTY(&ch->io_submitted));
    4206          75 :         assert(TAILQ_EMPTY(&ch->io_accel_exec));
    4207          75 :         assert(TAILQ_EMPTY(&ch->io_memory_domain));
    4208          75 :         assert(ch->io_outstanding == 0);
    4209          75 :         assert(shared_resource->ref > 0);
    4210          75 :         shared_resource->ref--;
    4211          75 :         if (shared_resource->ref == 0) {
    4212          74 :                 assert(shared_resource->io_outstanding == 0);
    4213          74 :                 TAILQ_REMOVE(&shared_resource->mgmt_ch->shared_resources, shared_resource, link);
    4214          74 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(shared_resource->mgmt_ch));
    4215          74 :                 spdk_poller_unregister(&shared_resource->nomem_poller);
    4216          74 :                 free(shared_resource);
    4217          74 :         }
    4218          75 : }
    4219             : 
    4220             : static void
    4221          84 : bdev_enable_qos(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch)
    4222             : {
    4223          84 :         struct spdk_bdev_qos    *qos = bdev->internal.qos;
    4224             :         int                     i;
    4225             : 
    4226          84 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    4227             : 
    4228             :         /* Rate limiting on this bdev enabled */
    4229          84 :         if (qos) {
    4230          17 :                 if (qos->ch == NULL) {
    4231             :                         struct spdk_io_channel *io_ch;
    4232             : 
    4233           9 :                         SPDK_DEBUGLOG(bdev, "Selecting channel %p as QoS channel for bdev %s on thread %p\n", ch,
    4234             :                                       bdev->name, spdk_get_thread());
    4235             : 
    4236             :                         /* No qos channel has been selected, so set one up */
    4237             : 
    4238             :                         /* Take another reference to ch */
    4239           9 :                         io_ch = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    4240           9 :                         assert(io_ch != NULL);
    4241           9 :                         qos->ch = ch;
    4242             : 
    4243           9 :                         qos->thread = spdk_io_channel_get_thread(io_ch);
    4244             : 
    4245          45 :                         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4246          36 :                                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    4247           9 :                                         qos->rate_limits[i].min_per_timeslice =
    4248             :                                                 SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE;
    4249           9 :                                 } else {
    4250          27 :                                         qos->rate_limits[i].min_per_timeslice =
    4251             :                                                 SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE;
    4252             :                                 }
    4253             : 
    4254          36 :                                 if (qos->rate_limits[i].limit == 0) {
    4255           2 :                                         qos->rate_limits[i].limit = SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    4256           2 :                                 }
    4257          36 :                         }
    4258           9 :                         bdev_qos_update_max_quota_per_timeslice(qos);
    4259           9 :                         qos->timeslice_size =
    4260           9 :                                 SPDK_BDEV_QOS_TIMESLICE_IN_USEC * spdk_get_ticks_hz() / SPDK_SEC_TO_USEC;
    4261           9 :                         qos->last_timeslice = spdk_get_ticks();
    4262           9 :                         qos->poller = SPDK_POLLER_REGISTER(bdev_channel_poll_qos,
    4263             :                                                            bdev,
    4264             :                                                            SPDK_BDEV_QOS_TIMESLICE_IN_USEC);
    4265           9 :                 }
    4266             : 
    4267          17 :                 ch->flags |= BDEV_CH_QOS_ENABLED;
    4268          17 :         }
    4269          84 : }
    4270             : 
    4271             : struct poll_timeout_ctx {
    4272             :         struct spdk_bdev_desc   *desc;
    4273             :         uint64_t                timeout_in_sec;
    4274             :         spdk_bdev_io_timeout_cb cb_fn;
    4275             :         void                    *cb_arg;
    4276             : };
    4277             : 
    4278             : static void
    4279         278 : bdev_desc_free(struct spdk_bdev_desc *desc)
    4280             : {
    4281         278 :         spdk_spin_destroy(&desc->spinlock);
    4282         278 :         free(desc->media_events_buffer);
    4283         278 :         free(desc);
    4284         278 : }
    4285             : 
    4286             : static void
    4287           8 : bdev_channel_poll_timeout_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    4288             : {
    4289           8 :         struct poll_timeout_ctx *ctx  = _ctx;
    4290           8 :         struct spdk_bdev_desc *desc = ctx->desc;
    4291             : 
    4292           8 :         free(ctx);
    4293             : 
    4294           8 :         spdk_spin_lock(&desc->spinlock);
    4295           8 :         desc->refs--;
    4296           8 :         if (desc->closed == true && desc->refs == 0) {
    4297           1 :                 spdk_spin_unlock(&desc->spinlock);
    4298           1 :                 bdev_desc_free(desc);
    4299           1 :                 return;
    4300             :         }
    4301           7 :         spdk_spin_unlock(&desc->spinlock);
    4302           8 : }
    4303             : 
    4304             : static void
    4305          13 : bdev_channel_poll_timeout_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    4306             :                              struct spdk_io_channel *io_ch, void *_ctx)
    4307             : {
    4308          13 :         struct poll_timeout_ctx *ctx  = _ctx;
    4309          13 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    4310          13 :         struct spdk_bdev_desc *desc = ctx->desc;
    4311             :         struct spdk_bdev_io *bdev_io;
    4312             :         uint64_t now;
    4313             : 
    4314          13 :         spdk_spin_lock(&desc->spinlock);
    4315          13 :         if (desc->closed == true) {
    4316           1 :                 spdk_spin_unlock(&desc->spinlock);
    4317           1 :                 spdk_bdev_for_each_channel_continue(i, -1);
    4318           1 :                 return;
    4319             :         }
    4320          12 :         spdk_spin_unlock(&desc->spinlock);
    4321             : 
    4322          12 :         now = spdk_get_ticks();
    4323          22 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
    4324             :                 /* Exclude any I/O that are generated via splitting. */
    4325          15 :                 if (bdev_io->internal.cb == bdev_io_split_done) {
    4326           3 :                         continue;
    4327             :                 }
    4328             : 
    4329             :                 /* Once we find an I/O that has not timed out, we can immediately
    4330             :                  * exit the loop.
    4331             :                  */
    4332          24 :                 if (now < (bdev_io->internal.submit_tsc +
    4333          12 :                            ctx->timeout_in_sec * spdk_get_ticks_hz())) {
    4334           5 :                         goto end;
    4335             :                 }
    4336             : 
    4337           7 :                 if (bdev_io->internal.desc == desc) {
    4338           7 :                         ctx->cb_fn(ctx->cb_arg, bdev_io);
    4339           7 :                 }
    4340          14 :         }
    4341             : 
    4342             : end:
    4343          12 :         spdk_bdev_for_each_channel_continue(i, 0);
    4344          13 : }
    4345             : 
    4346             : static int
    4347           8 : bdev_poll_timeout_io(void *arg)
    4348             : {
    4349           8 :         struct spdk_bdev_desc *desc = arg;
    4350           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    4351             :         struct poll_timeout_ctx *ctx;
    4352             : 
    4353           8 :         ctx = calloc(1, sizeof(struct poll_timeout_ctx));
    4354           8 :         if (!ctx) {
    4355           0 :                 SPDK_ERRLOG("failed to allocate memory\n");
    4356           0 :                 return SPDK_POLLER_BUSY;
    4357             :         }
    4358           8 :         ctx->desc = desc;
    4359           8 :         ctx->cb_arg = desc->cb_arg;
    4360           8 :         ctx->cb_fn = desc->cb_fn;
    4361           8 :         ctx->timeout_in_sec = desc->timeout_in_sec;
    4362             : 
    4363             :         /* Take a ref on the descriptor in case it gets closed while we are checking
    4364             :          * all of the channels.
    4365             :          */
    4366           8 :         spdk_spin_lock(&desc->spinlock);
    4367           8 :         desc->refs++;
    4368           8 :         spdk_spin_unlock(&desc->spinlock);
    4369             : 
    4370           8 :         spdk_bdev_for_each_channel(bdev, bdev_channel_poll_timeout_io, ctx,
    4371             :                                    bdev_channel_poll_timeout_io_done);
    4372             : 
    4373           8 :         return SPDK_POLLER_BUSY;
    4374           8 : }
    4375             : 
    4376             : int
    4377           5 : spdk_bdev_set_timeout(struct spdk_bdev_desc *desc, uint64_t timeout_in_sec,
    4378             :                       spdk_bdev_io_timeout_cb cb_fn, void *cb_arg)
    4379             : {
    4380           5 :         assert(desc->thread == spdk_get_thread());
    4381             : 
    4382           5 :         spdk_poller_unregister(&desc->io_timeout_poller);
    4383             : 
    4384           5 :         if (timeout_in_sec) {
    4385           4 :                 assert(cb_fn != NULL);
    4386           4 :                 desc->io_timeout_poller = SPDK_POLLER_REGISTER(bdev_poll_timeout_io,
    4387             :                                           desc,
    4388             :                                           SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * SPDK_SEC_TO_USEC /
    4389             :                                           1000);
    4390           4 :                 if (desc->io_timeout_poller == NULL) {
    4391           0 :                         SPDK_ERRLOG("can not register the desc timeout IO poller\n");
    4392           0 :                         return -1;
    4393             :                 }
    4394           4 :         }
    4395             : 
    4396           5 :         desc->cb_fn = cb_fn;
    4397           5 :         desc->cb_arg = cb_arg;
    4398           5 :         desc->timeout_in_sec = timeout_in_sec;
    4399             : 
    4400           5 :         return 0;
    4401           5 : }
    4402             : 
    4403             : static int
    4404          77 : bdev_channel_create(void *io_device, void *ctx_buf)
    4405             : {
    4406          77 :         struct spdk_bdev                *bdev = __bdev_from_io_dev(io_device);
    4407          77 :         struct spdk_bdev_channel        *ch = ctx_buf;
    4408             :         struct spdk_io_channel          *mgmt_io_ch;
    4409             :         struct spdk_bdev_mgmt_channel   *mgmt_ch;
    4410             :         struct spdk_bdev_shared_resource *shared_resource;
    4411             :         struct lba_range                *range;
    4412             : 
    4413          77 :         ch->bdev = bdev;
    4414          77 :         ch->channel = bdev->fn_table->get_io_channel(bdev->ctxt);
    4415          77 :         if (!ch->channel) {
    4416           2 :                 return -1;
    4417             :         }
    4418             : 
    4419          75 :         ch->accel_channel = spdk_accel_get_io_channel();
    4420          75 :         if (!ch->accel_channel) {
    4421           0 :                 spdk_put_io_channel(ch->channel);
    4422           0 :                 return -1;
    4423             :         }
    4424             : 
    4425          75 :         spdk_trace_record(TRACE_BDEV_IOCH_CREATE, bdev->internal.trace_id, 0, 0,
    4426             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4427             : 
    4428          75 :         assert(ch->histogram == NULL);
    4429          75 :         if (bdev->internal.histogram_enabled) {
    4430           0 :                 ch->histogram = spdk_histogram_data_alloc();
    4431           0 :                 if (ch->histogram == NULL) {
    4432           0 :                         SPDK_ERRLOG("Could not allocate histogram\n");
    4433           0 :                 }
    4434           0 :         }
    4435             : 
    4436          75 :         mgmt_io_ch = spdk_get_io_channel(&g_bdev_mgr);
    4437          75 :         if (!mgmt_io_ch) {
    4438           0 :                 spdk_put_io_channel(ch->channel);
    4439           0 :                 spdk_put_io_channel(ch->accel_channel);
    4440           0 :                 return -1;
    4441             :         }
    4442             : 
    4443          75 :         mgmt_ch = __io_ch_to_bdev_mgmt_ch(mgmt_io_ch);
    4444          77 :         TAILQ_FOREACH(shared_resource, &mgmt_ch->shared_resources, link) {
    4445           3 :                 if (shared_resource->shared_ch == ch->channel) {
    4446           1 :                         spdk_put_io_channel(mgmt_io_ch);
    4447           1 :                         shared_resource->ref++;
    4448           1 :                         break;
    4449             :                 }
    4450           2 :         }
    4451             : 
    4452          75 :         if (shared_resource == NULL) {
    4453          74 :                 shared_resource = calloc(1, sizeof(*shared_resource));
    4454          74 :                 if (shared_resource == NULL) {
    4455           0 :                         spdk_put_io_channel(ch->channel);
    4456           0 :                         spdk_put_io_channel(ch->accel_channel);
    4457           0 :                         spdk_put_io_channel(mgmt_io_ch);
    4458           0 :                         return -1;
    4459             :                 }
    4460             : 
    4461          74 :                 shared_resource->mgmt_ch = mgmt_ch;
    4462          74 :                 shared_resource->io_outstanding = 0;
    4463          74 :                 TAILQ_INIT(&shared_resource->nomem_io);
    4464          74 :                 shared_resource->nomem_threshold = 0;
    4465          74 :                 shared_resource->shared_ch = ch->channel;
    4466          74 :                 shared_resource->ref = 1;
    4467          74 :                 TAILQ_INSERT_TAIL(&mgmt_ch->shared_resources, shared_resource, link);
    4468          74 :         }
    4469             : 
    4470          75 :         ch->io_outstanding = 0;
    4471          75 :         TAILQ_INIT(&ch->locked_ranges);
    4472          75 :         TAILQ_INIT(&ch->qos_queued_io);
    4473          75 :         ch->flags = 0;
    4474          75 :         ch->trace_id = bdev->internal.trace_id;
    4475          75 :         ch->shared_resource = shared_resource;
    4476             : 
    4477          75 :         TAILQ_INIT(&ch->io_submitted);
    4478          75 :         TAILQ_INIT(&ch->io_locked);
    4479          75 :         TAILQ_INIT(&ch->io_accel_exec);
    4480          75 :         TAILQ_INIT(&ch->io_memory_domain);
    4481             : 
    4482          75 :         ch->stat = bdev_alloc_io_stat(false);
    4483          75 :         if (ch->stat == NULL) {
    4484           0 :                 bdev_channel_destroy_resource(ch);
    4485           0 :                 return -1;
    4486             :         }
    4487             : 
    4488          75 :         ch->stat->ticks_rate = spdk_get_ticks_hz();
    4489             : 
    4490             : #ifdef SPDK_CONFIG_VTUNE
    4491             :         {
    4492             :                 char *name;
    4493             :                 __itt_init_ittlib(NULL, 0);
    4494             :                 name = spdk_sprintf_alloc("spdk_bdev_%s_%p", ch->bdev->name, ch);
    4495             :                 if (!name) {
    4496             :                         bdev_channel_destroy_resource(ch);
    4497             :                         return -1;
    4498             :                 }
    4499             :                 ch->handle = __itt_string_handle_create(name);
    4500             :                 free(name);
    4501             :                 ch->start_tsc = spdk_get_ticks();
    4502             :                 ch->interval_tsc = spdk_get_ticks_hz() / 100;
    4503             :                 ch->prev_stat = bdev_alloc_io_stat(false);
    4504             :                 if (ch->prev_stat == NULL) {
    4505             :                         bdev_channel_destroy_resource(ch);
    4506             :                         return -1;
    4507             :                 }
    4508             :         }
    4509             : #endif
    4510             : 
    4511          75 :         spdk_spin_lock(&bdev->internal.spinlock);
    4512          75 :         bdev_enable_qos(bdev, ch);
    4513             : 
    4514          76 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
    4515             :                 struct lba_range *new_range;
    4516             : 
    4517           1 :                 new_range = calloc(1, sizeof(*new_range));
    4518           1 :                 if (new_range == NULL) {
    4519           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    4520           0 :                         bdev_channel_destroy_resource(ch);
    4521           0 :                         return -1;
    4522             :                 }
    4523           1 :                 new_range->length = range->length;
    4524           1 :                 new_range->offset = range->offset;
    4525           1 :                 new_range->locked_ctx = range->locked_ctx;
    4526           1 :                 TAILQ_INSERT_TAIL(&ch->locked_ranges, new_range, tailq);
    4527           1 :         }
    4528             : 
    4529          75 :         spdk_spin_unlock(&bdev->internal.spinlock);
    4530             : 
    4531          75 :         return 0;
    4532          77 : }
    4533             : 
    4534             : static int
    4535           0 : bdev_abort_all_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry,
    4536             :                          void *cb_ctx)
    4537             : {
    4538           0 :         struct spdk_bdev_channel *bdev_ch = cb_ctx;
    4539             :         struct spdk_bdev_io *bdev_io;
    4540             :         uint64_t buf_len;
    4541             : 
    4542           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4543           0 :         if (bdev_io->internal.ch == bdev_ch) {
    4544           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4545           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4546           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4547           0 :         }
    4548             : 
    4549           0 :         return 0;
    4550             : }
    4551             : 
    4552             : /*
    4553             :  * Abort I/O that are waiting on a data buffer.
    4554             :  */
    4555             : static void
    4556          98 : bdev_abort_all_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_channel *ch)
    4557             : {
    4558          98 :         spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_all_buf_io_cb, ch);
    4559          98 : }
    4560             : 
    4561             : /*
    4562             :  * Abort I/O that are queued waiting for submission.  These types of I/O are
    4563             :  *  linked using the spdk_bdev_io link TAILQ_ENTRY.
    4564             :  */
    4565             : static void
    4566         117 : bdev_abort_all_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_channel *ch)
    4567             : {
    4568             :         struct spdk_bdev_io *bdev_io, *tmp;
    4569             : 
    4570         156 :         TAILQ_FOREACH_SAFE(bdev_io, queue, internal.link, tmp) {
    4571          39 :                 if (bdev_io->internal.ch == ch) {
    4572          39 :                         TAILQ_REMOVE(queue, bdev_io, internal.link);
    4573             :                         /*
    4574             :                          * spdk_bdev_io_complete() assumes that the completed I/O had
    4575             :                          *  been submitted to the bdev module.  Since in this case it
    4576             :                          *  hadn't, bump io_outstanding to account for the decrement
    4577             :                          *  that spdk_bdev_io_complete() will do.
    4578             :                          */
    4579          39 :                         if (bdev_io->type != SPDK_BDEV_IO_TYPE_RESET) {
    4580          39 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    4581          39 :                         }
    4582          39 :                         spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4583          39 :                 }
    4584          39 :         }
    4585         117 : }
    4586             : 
    4587             : static bool
    4588          18 : bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort)
    4589             : {
    4590             :         struct spdk_bdev_io *bdev_io;
    4591             : 
    4592          18 :         TAILQ_FOREACH(bdev_io, queue, internal.link) {
    4593           0 :                 if (bdev_io == bio_to_abort) {
    4594           0 :                         TAILQ_REMOVE(queue, bio_to_abort, internal.link);
    4595           0 :                         spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4596           0 :                         return true;
    4597             :                 }
    4598           0 :         }
    4599             : 
    4600          18 :         return false;
    4601          18 : }
    4602             : 
    4603             : static int
    4604           0 : bdev_abort_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry, void *cb_ctx)
    4605             : {
    4606           0 :         struct spdk_bdev_io *bdev_io, *bio_to_abort = cb_ctx;
    4607             :         uint64_t buf_len;
    4608             : 
    4609           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4610           0 :         if (bdev_io == bio_to_abort) {
    4611           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4612           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4613           0 :                 spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4614           0 :                 return 1;
    4615             :         }
    4616             : 
    4617           0 :         return 0;
    4618           0 : }
    4619             : 
    4620             : static bool
    4621          16 : bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_io *bio_to_abort)
    4622             : {
    4623             :         int rc;
    4624             : 
    4625          16 :         rc = spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_buf_io_cb, bio_to_abort);
    4626          16 :         return rc == 1;
    4627             : }
    4628             : 
    4629             : static void
    4630           7 : bdev_qos_channel_destroy(void *cb_arg)
    4631             : {
    4632           7 :         struct spdk_bdev_qos *qos = cb_arg;
    4633             : 
    4634           7 :         spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    4635           7 :         spdk_poller_unregister(&qos->poller);
    4636             : 
    4637           7 :         SPDK_DEBUGLOG(bdev, "Free QoS %p.\n", qos);
    4638             : 
    4639           7 :         free(qos);
    4640           7 : }
    4641             : 
    4642             : static int
    4643           7 : bdev_qos_destroy(struct spdk_bdev *bdev)
    4644             : {
    4645             :         int i;
    4646             : 
    4647             :         /*
    4648             :          * Cleanly shutting down the QoS poller is tricky, because
    4649             :          * during the asynchronous operation the user could open
    4650             :          * a new descriptor and create a new channel, spawning
    4651             :          * a new QoS poller.
    4652             :          *
    4653             :          * The strategy is to create a new QoS structure here and swap it
    4654             :          * in. The shutdown path then continues to refer to the old one
    4655             :          * until it completes and then releases it.
    4656             :          */
    4657             :         struct spdk_bdev_qos *new_qos, *old_qos;
    4658             : 
    4659           7 :         old_qos = bdev->internal.qos;
    4660             : 
    4661           7 :         new_qos = calloc(1, sizeof(*new_qos));
    4662           7 :         if (!new_qos) {
    4663           0 :                 SPDK_ERRLOG("Unable to allocate memory to shut down QoS.\n");
    4664           0 :                 return -ENOMEM;
    4665             :         }
    4666             : 
    4667             :         /* Copy the old QoS data into the newly allocated structure */
    4668           7 :         memcpy(new_qos, old_qos, sizeof(*new_qos));
    4669             : 
    4670             :         /* Zero out the key parts of the QoS structure */
    4671           7 :         new_qos->ch = NULL;
    4672           7 :         new_qos->thread = NULL;
    4673           7 :         new_qos->poller = NULL;
    4674             :         /*
    4675             :          * The limit member of spdk_bdev_qos_limit structure is not zeroed.
    4676             :          * It will be used later for the new QoS structure.
    4677             :          */
    4678          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4679          28 :                 new_qos->rate_limits[i].remaining_this_timeslice = 0;
    4680          28 :                 new_qos->rate_limits[i].min_per_timeslice = 0;
    4681          28 :                 new_qos->rate_limits[i].max_per_timeslice = 0;
    4682          28 :         }
    4683             : 
    4684           7 :         bdev->internal.qos = new_qos;
    4685             : 
    4686           7 :         if (old_qos->thread == NULL) {
    4687           0 :                 free(old_qos);
    4688           0 :         } else {
    4689           7 :                 spdk_thread_send_msg(old_qos->thread, bdev_qos_channel_destroy, old_qos);
    4690             :         }
    4691             : 
    4692             :         /* It is safe to continue with destroying the bdev even though the QoS channel hasn't
    4693             :          * been destroyed yet. The destruction path will end up waiting for the final
    4694             :          * channel to be put before it releases resources. */
    4695             : 
    4696           7 :         return 0;
    4697           7 : }
    4698             : 
    4699             : void
    4700          79 : spdk_bdev_add_io_stat(struct spdk_bdev_io_stat *total, struct spdk_bdev_io_stat *add)
    4701             : {
    4702          79 :         total->bytes_read += add->bytes_read;
    4703          79 :         total->num_read_ops += add->num_read_ops;
    4704          79 :         total->bytes_written += add->bytes_written;
    4705          79 :         total->num_write_ops += add->num_write_ops;
    4706          79 :         total->bytes_unmapped += add->bytes_unmapped;
    4707          79 :         total->num_unmap_ops += add->num_unmap_ops;
    4708          79 :         total->bytes_copied += add->bytes_copied;
    4709          79 :         total->num_copy_ops += add->num_copy_ops;
    4710          79 :         total->read_latency_ticks += add->read_latency_ticks;
    4711          79 :         total->write_latency_ticks += add->write_latency_ticks;
    4712          79 :         total->unmap_latency_ticks += add->unmap_latency_ticks;
    4713          79 :         total->copy_latency_ticks += add->copy_latency_ticks;
    4714          79 :         if (total->max_read_latency_ticks < add->max_read_latency_ticks) {
    4715           7 :                 total->max_read_latency_ticks = add->max_read_latency_ticks;
    4716           7 :         }
    4717          79 :         if (total->min_read_latency_ticks > add->min_read_latency_ticks) {
    4718          39 :                 total->min_read_latency_ticks = add->min_read_latency_ticks;
    4719          39 :         }
    4720          79 :         if (total->max_write_latency_ticks < add->max_write_latency_ticks) {
    4721           4 :                 total->max_write_latency_ticks = add->max_write_latency_ticks;
    4722           4 :         }
    4723          79 :         if (total->min_write_latency_ticks > add->min_write_latency_ticks) {
    4724          24 :                 total->min_write_latency_ticks = add->min_write_latency_ticks;
    4725          24 :         }
    4726          79 :         if (total->max_unmap_latency_ticks < add->max_unmap_latency_ticks) {
    4727           0 :                 total->max_unmap_latency_ticks = add->max_unmap_latency_ticks;
    4728           0 :         }
    4729          79 :         if (total->min_unmap_latency_ticks > add->min_unmap_latency_ticks) {
    4730           3 :                 total->min_unmap_latency_ticks = add->min_unmap_latency_ticks;
    4731           3 :         }
    4732          79 :         if (total->max_copy_latency_ticks < add->max_copy_latency_ticks) {
    4733           0 :                 total->max_copy_latency_ticks = add->max_copy_latency_ticks;
    4734           0 :         }
    4735          79 :         if (total->min_copy_latency_ticks > add->min_copy_latency_ticks) {
    4736           4 :                 total->min_copy_latency_ticks = add->min_copy_latency_ticks;
    4737           4 :         }
    4738          79 : }
    4739             : 
    4740             : static void
    4741           5 : bdev_get_io_stat(struct spdk_bdev_io_stat *to_stat, struct spdk_bdev_io_stat *from_stat)
    4742             : {
    4743           5 :         memcpy(to_stat, from_stat, offsetof(struct spdk_bdev_io_stat, io_error));
    4744             : 
    4745           5 :         if (to_stat->io_error != NULL && from_stat->io_error != NULL) {
    4746           0 :                 memcpy(to_stat->io_error, from_stat->io_error,
    4747             :                        sizeof(struct spdk_bdev_io_error_stat));
    4748           0 :         }
    4749           5 : }
    4750             : 
    4751             : void
    4752         216 : spdk_bdev_reset_io_stat(struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode mode)
    4753             : {
    4754         216 :         if (mode == SPDK_BDEV_RESET_STAT_NONE) {
    4755           5 :                 return;
    4756             :         }
    4757             : 
    4758         211 :         stat->max_read_latency_ticks = 0;
    4759         211 :         stat->min_read_latency_ticks = UINT64_MAX;
    4760         211 :         stat->max_write_latency_ticks = 0;
    4761         211 :         stat->min_write_latency_ticks = UINT64_MAX;
    4762         211 :         stat->max_unmap_latency_ticks = 0;
    4763         211 :         stat->min_unmap_latency_ticks = UINT64_MAX;
    4764         211 :         stat->max_copy_latency_ticks = 0;
    4765         211 :         stat->min_copy_latency_ticks = UINT64_MAX;
    4766             : 
    4767         211 :         if (mode != SPDK_BDEV_RESET_STAT_ALL) {
    4768           2 :                 return;
    4769             :         }
    4770             : 
    4771         209 :         stat->bytes_read = 0;
    4772         209 :         stat->num_read_ops = 0;
    4773         209 :         stat->bytes_written = 0;
    4774         209 :         stat->num_write_ops = 0;
    4775         209 :         stat->bytes_unmapped = 0;
    4776         209 :         stat->num_unmap_ops = 0;
    4777         209 :         stat->bytes_copied = 0;
    4778         209 :         stat->num_copy_ops = 0;
    4779         209 :         stat->read_latency_ticks = 0;
    4780         209 :         stat->write_latency_ticks = 0;
    4781         209 :         stat->unmap_latency_ticks = 0;
    4782         209 :         stat->copy_latency_ticks = 0;
    4783             : 
    4784         209 :         if (stat->io_error != NULL) {
    4785         133 :                 memset(stat->io_error, 0, sizeof(struct spdk_bdev_io_error_stat));
    4786         133 :         }
    4787         216 : }
    4788             : 
    4789             : struct spdk_bdev_io_stat *
    4790         207 : bdev_alloc_io_stat(bool io_error_stat)
    4791             : {
    4792             :         struct spdk_bdev_io_stat *stat;
    4793             : 
    4794         207 :         stat = malloc(sizeof(struct spdk_bdev_io_stat));
    4795         207 :         if (stat == NULL) {
    4796           0 :                 return NULL;
    4797             :         }
    4798             : 
    4799         207 :         if (io_error_stat) {
    4800         132 :                 stat->io_error = malloc(sizeof(struct spdk_bdev_io_error_stat));
    4801         132 :                 if (stat->io_error == NULL) {
    4802           0 :                         free(stat);
    4803           0 :                         return NULL;
    4804             :                 }
    4805         132 :         } else {
    4806          75 :                 stat->io_error = NULL;
    4807             :         }
    4808             : 
    4809         207 :         spdk_bdev_reset_io_stat(stat, SPDK_BDEV_RESET_STAT_ALL);
    4810             : 
    4811         207 :         return stat;
    4812         207 : }
    4813             : 
    4814             : void
    4815         207 : bdev_free_io_stat(struct spdk_bdev_io_stat *stat)
    4816             : {
    4817         207 :         if (stat != NULL) {
    4818         207 :                 free(stat->io_error);
    4819         207 :                 free(stat);
    4820         207 :         }
    4821         207 : }
    4822             : 
    4823             : void
    4824           0 : spdk_bdev_dump_io_stat_json(struct spdk_bdev_io_stat *stat, struct spdk_json_write_ctx *w)
    4825             : {
    4826             :         int i;
    4827             : 
    4828           0 :         spdk_json_write_named_uint64(w, "bytes_read", stat->bytes_read);
    4829           0 :         spdk_json_write_named_uint64(w, "num_read_ops", stat->num_read_ops);
    4830           0 :         spdk_json_write_named_uint64(w, "bytes_written", stat->bytes_written);
    4831           0 :         spdk_json_write_named_uint64(w, "num_write_ops", stat->num_write_ops);
    4832           0 :         spdk_json_write_named_uint64(w, "bytes_unmapped", stat->bytes_unmapped);
    4833           0 :         spdk_json_write_named_uint64(w, "num_unmap_ops", stat->num_unmap_ops);
    4834           0 :         spdk_json_write_named_uint64(w, "bytes_copied", stat->bytes_copied);
    4835           0 :         spdk_json_write_named_uint64(w, "num_copy_ops", stat->num_copy_ops);
    4836           0 :         spdk_json_write_named_uint64(w, "read_latency_ticks", stat->read_latency_ticks);
    4837           0 :         spdk_json_write_named_uint64(w, "max_read_latency_ticks", stat->max_read_latency_ticks);
    4838           0 :         spdk_json_write_named_uint64(w, "min_read_latency_ticks",
    4839           0 :                                      stat->min_read_latency_ticks != UINT64_MAX ?
    4840           0 :                                      stat->min_read_latency_ticks : 0);
    4841           0 :         spdk_json_write_named_uint64(w, "write_latency_ticks", stat->write_latency_ticks);
    4842           0 :         spdk_json_write_named_uint64(w, "max_write_latency_ticks", stat->max_write_latency_ticks);
    4843           0 :         spdk_json_write_named_uint64(w, "min_write_latency_ticks",
    4844           0 :                                      stat->min_write_latency_ticks != UINT64_MAX ?
    4845           0 :                                      stat->min_write_latency_ticks : 0);
    4846           0 :         spdk_json_write_named_uint64(w, "unmap_latency_ticks", stat->unmap_latency_ticks);
    4847           0 :         spdk_json_write_named_uint64(w, "max_unmap_latency_ticks", stat->max_unmap_latency_ticks);
    4848           0 :         spdk_json_write_named_uint64(w, "min_unmap_latency_ticks",
    4849           0 :                                      stat->min_unmap_latency_ticks != UINT64_MAX ?
    4850           0 :                                      stat->min_unmap_latency_ticks : 0);
    4851           0 :         spdk_json_write_named_uint64(w, "copy_latency_ticks", stat->copy_latency_ticks);
    4852           0 :         spdk_json_write_named_uint64(w, "max_copy_latency_ticks", stat->max_copy_latency_ticks);
    4853           0 :         spdk_json_write_named_uint64(w, "min_copy_latency_ticks",
    4854           0 :                                      stat->min_copy_latency_ticks != UINT64_MAX ?
    4855           0 :                                      stat->min_copy_latency_ticks : 0);
    4856             : 
    4857           0 :         if (stat->io_error != NULL) {
    4858           0 :                 spdk_json_write_named_object_begin(w, "io_error");
    4859           0 :                 for (i = 0; i < -SPDK_MIN_BDEV_IO_STATUS; i++) {
    4860           0 :                         if (stat->io_error->error_status[i] != 0) {
    4861           0 :                                 spdk_json_write_named_uint32(w, bdev_io_status_get_string(-(i + 1)),
    4862           0 :                                                              stat->io_error->error_status[i]);
    4863           0 :                         }
    4864           0 :                 }
    4865           0 :                 spdk_json_write_object_end(w);
    4866           0 :         }
    4867           0 : }
    4868             : 
    4869             : static void
    4870          79 : bdev_channel_abort_queued_ios(struct spdk_bdev_channel *ch)
    4871             : {
    4872          79 :         struct spdk_bdev_shared_resource *shared_resource = ch->shared_resource;
    4873          79 :         struct spdk_bdev_mgmt_channel *mgmt_ch = shared_resource->mgmt_ch;
    4874             : 
    4875          79 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, ch);
    4876          79 :         bdev_abort_all_buf_io(mgmt_ch, ch);
    4877          79 : }
    4878             : 
    4879             : static void
    4880          75 : bdev_channel_destroy(void *io_device, void *ctx_buf)
    4881             : {
    4882          75 :         struct spdk_bdev_channel *ch = ctx_buf;
    4883             : 
    4884          75 :         SPDK_DEBUGLOG(bdev, "Destroying channel %p for bdev %s on thread %p\n", ch, ch->bdev->name,
    4885             :                       spdk_get_thread());
    4886             : 
    4887          75 :         spdk_trace_record(TRACE_BDEV_IOCH_DESTROY, ch->bdev->internal.trace_id, 0, 0,
    4888             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4889             : 
    4890             :         /* This channel is going away, so add its statistics into the bdev so that they don't get lost. */
    4891          75 :         spdk_spin_lock(&ch->bdev->internal.spinlock);
    4892          75 :         spdk_bdev_add_io_stat(ch->bdev->internal.stat, ch->stat);
    4893          75 :         spdk_spin_unlock(&ch->bdev->internal.spinlock);
    4894             : 
    4895          75 :         bdev_channel_abort_queued_ios(ch);
    4896             : 
    4897          75 :         if (ch->histogram) {
    4898           0 :                 spdk_histogram_data_free(ch->histogram);
    4899           0 :         }
    4900             : 
    4901          75 :         bdev_channel_destroy_resource(ch);
    4902          75 : }
    4903             : 
    4904             : /*
    4905             :  * If the name already exists in the global bdev name tree, RB_INSERT() returns a pointer
    4906             :  * to it. Hence we do not have to call bdev_get_by_name() when using this function.
    4907             :  */
    4908             : static int
    4909         267 : bdev_name_add(struct spdk_bdev_name *bdev_name, struct spdk_bdev *bdev, const char *name)
    4910             : {
    4911             :         struct spdk_bdev_name *tmp;
    4912             : 
    4913         267 :         bdev_name->name = strdup(name);
    4914         267 :         if (bdev_name->name == NULL) {
    4915           0 :                 SPDK_ERRLOG("Unable to allocate bdev name\n");
    4916           0 :                 return -ENOMEM;
    4917             :         }
    4918             : 
    4919         267 :         bdev_name->bdev = bdev;
    4920             : 
    4921         267 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4922         267 :         tmp = RB_INSERT(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4923         267 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4924             : 
    4925         267 :         if (tmp != NULL) {
    4926           4 :                 SPDK_ERRLOG("Bdev name %s already exists\n", name);
    4927           4 :                 free(bdev_name->name);
    4928           4 :                 return -EEXIST;
    4929             :         }
    4930             : 
    4931         263 :         return 0;
    4932         267 : }
    4933             : 
    4934             : static void
    4935         263 : bdev_name_del_unsafe(struct spdk_bdev_name *bdev_name)
    4936             : {
    4937         263 :         RB_REMOVE(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4938         263 :         free(bdev_name->name);
    4939         263 : }
    4940             : 
    4941             : static void
    4942           5 : bdev_name_del(struct spdk_bdev_name *bdev_name)
    4943             : {
    4944           5 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4945           5 :         bdev_name_del_unsafe(bdev_name);
    4946           5 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4947           5 : }
    4948             : 
    4949             : int
    4950         138 : spdk_bdev_alias_add(struct spdk_bdev *bdev, const char *alias)
    4951             : {
    4952             :         struct spdk_bdev_alias *tmp;
    4953             :         int ret;
    4954             : 
    4955         138 :         if (alias == NULL) {
    4956           1 :                 SPDK_ERRLOG("Empty alias passed\n");
    4957           1 :                 return -EINVAL;
    4958             :         }
    4959             : 
    4960         137 :         tmp = calloc(1, sizeof(*tmp));
    4961         137 :         if (tmp == NULL) {
    4962           0 :                 SPDK_ERRLOG("Unable to allocate alias\n");
    4963           0 :                 return -ENOMEM;
    4964             :         }
    4965             : 
    4966         137 :         ret = bdev_name_add(&tmp->alias, bdev, alias);
    4967         137 :         if (ret != 0) {
    4968           4 :                 free(tmp);
    4969           4 :                 return ret;
    4970             :         }
    4971             : 
    4972         133 :         TAILQ_INSERT_TAIL(&bdev->aliases, tmp, tailq);
    4973             : 
    4974         133 :         return 0;
    4975         138 : }
    4976             : 
    4977             : static int
    4978         134 : bdev_alias_del(struct spdk_bdev *bdev, const char *alias,
    4979             :                void (*alias_del_fn)(struct spdk_bdev_name *n))
    4980             : {
    4981             :         struct spdk_bdev_alias *tmp;
    4982             : 
    4983         139 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
    4984         135 :                 if (strcmp(alias, tmp->alias.name) == 0) {
    4985         130 :                         TAILQ_REMOVE(&bdev->aliases, tmp, tailq);
    4986         130 :                         alias_del_fn(&tmp->alias);
    4987         130 :                         free(tmp);
    4988         130 :                         return 0;
    4989             :                 }
    4990           5 :         }
    4991             : 
    4992           4 :         return -ENOENT;
    4993         134 : }
    4994             : 
    4995             : int
    4996           4 : spdk_bdev_alias_del(struct spdk_bdev *bdev, const char *alias)
    4997             : {
    4998             :         int rc;
    4999             : 
    5000           4 :         rc = bdev_alias_del(bdev, alias, bdev_name_del);
    5001           4 :         if (rc == -ENOENT) {
    5002           2 :                 SPDK_INFOLOG(bdev, "Alias %s does not exist\n", alias);
    5003           2 :         }
    5004             : 
    5005           4 :         return rc;
    5006             : }
    5007             : 
    5008             : void
    5009           2 : spdk_bdev_alias_del_all(struct spdk_bdev *bdev)
    5010             : {
    5011             :         struct spdk_bdev_alias *p, *tmp;
    5012             : 
    5013           5 :         TAILQ_FOREACH_SAFE(p, &bdev->aliases, tailq, tmp) {
    5014           3 :                 TAILQ_REMOVE(&bdev->aliases, p, tailq);
    5015           3 :                 bdev_name_del(&p->alias);
    5016           3 :                 free(p);
    5017           3 :         }
    5018           2 : }
    5019             : 
    5020             : struct spdk_io_channel *
    5021          77 : spdk_bdev_get_io_channel(struct spdk_bdev_desc *desc)
    5022             : {
    5023          77 :         return spdk_get_io_channel(__bdev_to_io_dev(spdk_bdev_desc_get_bdev(desc)));
    5024             : }
    5025             : 
    5026             : void *
    5027           0 : spdk_bdev_get_module_ctx(struct spdk_bdev_desc *desc)
    5028             : {
    5029           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5030           0 :         void *ctx = NULL;
    5031             : 
    5032           0 :         if (bdev->fn_table->get_module_ctx) {
    5033           0 :                 ctx = bdev->fn_table->get_module_ctx(bdev->ctxt);
    5034           0 :         }
    5035             : 
    5036           0 :         return ctx;
    5037             : }
    5038             : 
    5039             : const char *
    5040           0 : spdk_bdev_get_module_name(const struct spdk_bdev *bdev)
    5041             : {
    5042           0 :         return bdev->module->name;
    5043             : }
    5044             : 
    5045             : const char *
    5046         263 : spdk_bdev_get_name(const struct spdk_bdev *bdev)
    5047             : {
    5048         263 :         return bdev->name;
    5049             : }
    5050             : 
    5051             : const char *
    5052           0 : spdk_bdev_get_product_name(const struct spdk_bdev *bdev)
    5053             : {
    5054           0 :         return bdev->product_name;
    5055             : }
    5056             : 
    5057             : const struct spdk_bdev_aliases_list *
    5058           0 : spdk_bdev_get_aliases(const struct spdk_bdev *bdev)
    5059             : {
    5060           0 :         return &bdev->aliases;
    5061             : }
    5062             : 
    5063             : uint32_t
    5064           5 : spdk_bdev_get_block_size(const struct spdk_bdev *bdev)
    5065             : {
    5066           5 :         return bdev->blocklen;
    5067             : }
    5068             : 
    5069             : uint32_t
    5070           0 : spdk_bdev_get_write_unit_size(const struct spdk_bdev *bdev)
    5071             : {
    5072           0 :         return bdev->write_unit_size;
    5073             : }
    5074             : 
    5075             : uint64_t
    5076           0 : spdk_bdev_get_num_blocks(const struct spdk_bdev *bdev)
    5077             : {
    5078           0 :         return bdev->blockcnt;
    5079             : }
    5080             : 
    5081             : const char *
    5082           0 : spdk_bdev_get_qos_rpc_type(enum spdk_bdev_qos_rate_limit_type type)
    5083             : {
    5084           0 :         return qos_rpc_type[type];
    5085             : }
    5086             : 
    5087             : void
    5088           0 : spdk_bdev_get_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    5089             : {
    5090             :         int i;
    5091             : 
    5092           0 :         memset(limits, 0, sizeof(*limits) * SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    5093             : 
    5094           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    5095           0 :         if (bdev->internal.qos) {
    5096           0 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    5097           0 :                         if (bdev->internal.qos->rate_limits[i].limit !=
    5098             :                             SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    5099           0 :                                 limits[i] = bdev->internal.qos->rate_limits[i].limit;
    5100           0 :                                 if (bdev_qos_is_iops_rate_limit(i) == false) {
    5101             :                                         /* Change from Byte to Megabyte which is user visible. */
    5102           0 :                                         limits[i] = limits[i] / 1024 / 1024;
    5103           0 :                                 }
    5104           0 :                         }
    5105           0 :                 }
    5106           0 :         }
    5107           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    5108           0 : }
    5109             : 
    5110             : size_t
    5111         280 : spdk_bdev_get_buf_align(const struct spdk_bdev *bdev)
    5112             : {
    5113         280 :         return 1 << bdev->required_alignment;
    5114             : }
    5115             : 
    5116             : uint32_t
    5117           0 : spdk_bdev_get_optimal_io_boundary(const struct spdk_bdev *bdev)
    5118             : {
    5119           0 :         return bdev->optimal_io_boundary;
    5120             : }
    5121             : 
    5122             : bool
    5123           0 : spdk_bdev_has_write_cache(const struct spdk_bdev *bdev)
    5124             : {
    5125           0 :         return bdev->write_cache;
    5126             : }
    5127             : 
    5128             : const struct spdk_uuid *
    5129           0 : spdk_bdev_get_uuid(const struct spdk_bdev *bdev)
    5130             : {
    5131           0 :         return &bdev->uuid;
    5132             : }
    5133             : 
    5134             : uint16_t
    5135           0 : spdk_bdev_get_acwu(const struct spdk_bdev *bdev)
    5136             : {
    5137           0 :         return bdev->acwu;
    5138             : }
    5139             : 
    5140             : uint32_t
    5141          29 : spdk_bdev_get_md_size(const struct spdk_bdev *bdev)
    5142             : {
    5143          29 :         return bdev->md_len;
    5144             : }
    5145             : 
    5146             : bool
    5147         135 : spdk_bdev_is_md_interleaved(const struct spdk_bdev *bdev)
    5148             : {
    5149         135 :         return (bdev->md_len != 0) && bdev->md_interleave;
    5150             : }
    5151             : 
    5152             : bool
    5153         117 : spdk_bdev_is_md_separate(const struct spdk_bdev *bdev)
    5154             : {
    5155         117 :         return (bdev->md_len != 0) && !bdev->md_interleave;
    5156             : }
    5157             : 
    5158             : bool
    5159           0 : spdk_bdev_is_zoned(const struct spdk_bdev *bdev)
    5160             : {
    5161           0 :         return bdev->zoned;
    5162             : }
    5163             : 
    5164             : uint32_t
    5165         126 : spdk_bdev_get_data_block_size(const struct spdk_bdev *bdev)
    5166             : {
    5167         126 :         if (spdk_bdev_is_md_interleaved(bdev)) {
    5168           0 :                 return bdev->blocklen - bdev->md_len;
    5169             :         } else {
    5170         126 :                 return bdev->blocklen;
    5171             :         }
    5172         126 : }
    5173             : 
    5174             : uint32_t
    5175           0 : spdk_bdev_get_physical_block_size(const struct spdk_bdev *bdev)
    5176             : {
    5177           0 :         return bdev->phys_blocklen;
    5178             : }
    5179             : 
    5180             : static uint32_t
    5181           9 : _bdev_get_block_size_with_md(const struct spdk_bdev *bdev)
    5182             : {
    5183           9 :         if (!spdk_bdev_is_md_interleaved(bdev)) {
    5184           6 :                 return bdev->blocklen + bdev->md_len;
    5185             :         } else {
    5186           3 :                 return bdev->blocklen;
    5187             :         }
    5188           9 : }
    5189             : 
    5190             : /* We have to use the typedef in the function declaration to appease astyle. */
    5191             : typedef enum spdk_dif_type spdk_dif_type_t;
    5192             : typedef enum spdk_dif_pi_format spdk_dif_pi_format_t;
    5193             : 
    5194             : spdk_dif_type_t
    5195           0 : spdk_bdev_get_dif_type(const struct spdk_bdev *bdev)
    5196             : {
    5197           0 :         if (bdev->md_len != 0) {
    5198           0 :                 return bdev->dif_type;
    5199             :         } else {
    5200           0 :                 return SPDK_DIF_DISABLE;
    5201             :         }
    5202           0 : }
    5203             : 
    5204             : spdk_dif_pi_format_t
    5205           0 : spdk_bdev_get_dif_pi_format(const struct spdk_bdev *bdev)
    5206             : {
    5207           0 :         return bdev->dif_pi_format;
    5208             : }
    5209             : 
    5210             : bool
    5211           0 : spdk_bdev_is_dif_head_of_md(const struct spdk_bdev *bdev)
    5212             : {
    5213           0 :         if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
    5214           0 :                 return bdev->dif_is_head_of_md;
    5215             :         } else {
    5216           0 :                 return false;
    5217             :         }
    5218           0 : }
    5219             : 
    5220             : bool
    5221           0 : spdk_bdev_is_dif_check_enabled(const struct spdk_bdev *bdev,
    5222             :                                enum spdk_dif_check_type check_type)
    5223             : {
    5224           0 :         if (spdk_bdev_get_dif_type(bdev) == SPDK_DIF_DISABLE) {
    5225           0 :                 return false;
    5226             :         }
    5227             : 
    5228           0 :         switch (check_type) {
    5229             :         case SPDK_DIF_CHECK_TYPE_REFTAG:
    5230           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_REFTAG_CHECK) != 0;
    5231             :         case SPDK_DIF_CHECK_TYPE_APPTAG:
    5232           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_APPTAG_CHECK) != 0;
    5233             :         case SPDK_DIF_CHECK_TYPE_GUARD:
    5234           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_GUARD_CHECK) != 0;
    5235             :         default:
    5236           0 :                 return false;
    5237             :         }
    5238           0 : }
    5239             : 
    5240             : static uint32_t
    5241           3 : bdev_get_max_write(const struct spdk_bdev *bdev, uint64_t num_bytes)
    5242             : {
    5243             :         uint64_t aligned_length, max_write_blocks;
    5244             : 
    5245           3 :         aligned_length = num_bytes - (spdk_bdev_get_buf_align(bdev) - 1);
    5246           3 :         max_write_blocks = aligned_length / _bdev_get_block_size_with_md(bdev);
    5247           3 :         max_write_blocks -= max_write_blocks % bdev->write_unit_size;
    5248             : 
    5249           3 :         return max_write_blocks;
    5250             : }
    5251             : 
    5252             : uint32_t
    5253           1 : spdk_bdev_get_max_copy(const struct spdk_bdev *bdev)
    5254             : {
    5255           1 :         return bdev->max_copy;
    5256             : }
    5257             : 
    5258             : uint64_t
    5259           0 : spdk_bdev_get_qd(const struct spdk_bdev *bdev)
    5260             : {
    5261           0 :         return bdev->internal.measured_queue_depth;
    5262             : }
    5263             : 
    5264             : uint64_t
    5265           0 : spdk_bdev_get_qd_sampling_period(const struct spdk_bdev *bdev)
    5266             : {
    5267           0 :         return bdev->internal.period;
    5268             : }
    5269             : 
    5270             : uint64_t
    5271           0 : spdk_bdev_get_weighted_io_time(const struct spdk_bdev *bdev)
    5272             : {
    5273           0 :         return bdev->internal.weighted_io_time;
    5274             : }
    5275             : 
    5276             : uint64_t
    5277           0 : spdk_bdev_get_io_time(const struct spdk_bdev *bdev)
    5278             : {
    5279           0 :         return bdev->internal.io_time;
    5280             : }
    5281             : 
    5282           0 : union spdk_bdev_nvme_ctratt spdk_bdev_get_nvme_ctratt(struct spdk_bdev *bdev)
    5283             : {
    5284           0 :         return bdev->ctratt;
    5285             : }
    5286             : 
    5287             : uint32_t
    5288           0 : spdk_bdev_get_nvme_nsid(struct spdk_bdev *bdev)
    5289             : {
    5290           0 :         return bdev->nsid;
    5291             : }
    5292             : 
    5293             : uint32_t
    5294           0 : spdk_bdev_desc_get_block_size(struct spdk_bdev_desc *desc)
    5295             : {
    5296           0 :         struct spdk_bdev *bdev = desc->bdev;
    5297             : 
    5298           0 :         return desc->opts.hide_metadata ? bdev->blocklen - bdev->md_len : bdev->blocklen;
    5299             : }
    5300             : 
    5301             : uint32_t
    5302           0 : spdk_bdev_desc_get_md_size(struct spdk_bdev_desc *desc)
    5303             : {
    5304           0 :         struct spdk_bdev *bdev = desc->bdev;
    5305             : 
    5306           0 :         return desc->opts.hide_metadata ? 0 : bdev->md_len;
    5307             : }
    5308             : 
    5309             : bool
    5310           0 : spdk_bdev_desc_is_md_interleaved(struct spdk_bdev_desc *desc)
    5311             : {
    5312           0 :         struct spdk_bdev *bdev = desc->bdev;
    5313             : 
    5314           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_interleaved(bdev);
    5315             : }
    5316             : 
    5317             : bool
    5318           0 : spdk_bdev_desc_is_md_separate(struct spdk_bdev_desc *desc)
    5319             : {
    5320           0 :         struct spdk_bdev *bdev = desc->bdev;
    5321             : 
    5322           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_separate(bdev);
    5323             : }
    5324             : 
    5325             : spdk_dif_type_t
    5326           0 : spdk_bdev_desc_get_dif_type(struct spdk_bdev_desc *desc)
    5327             : {
    5328           0 :         struct spdk_bdev *bdev = desc->bdev;
    5329             : 
    5330           0 :         return desc->opts.hide_metadata ? SPDK_DIF_DISABLE : spdk_bdev_get_dif_type(bdev);
    5331             : }
    5332             : 
    5333             : spdk_dif_pi_format_t
    5334           0 : spdk_bdev_desc_get_dif_pi_format(struct spdk_bdev_desc *desc)
    5335             : {
    5336           0 :         struct spdk_bdev *bdev = desc->bdev;
    5337             : 
    5338           0 :         return desc->opts.hide_metadata ? SPDK_DIF_PI_FORMAT_16 : spdk_bdev_get_dif_pi_format(bdev);
    5339             : }
    5340             : 
    5341             : bool
    5342           0 : spdk_bdev_desc_is_dif_head_of_md(struct spdk_bdev_desc *desc)
    5343             : {
    5344           0 :         struct spdk_bdev *bdev = desc->bdev;
    5345             : 
    5346           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_head_of_md(bdev);
    5347             : }
    5348             : 
    5349             : bool
    5350           0 : spdk_bdev_desc_is_dif_check_enabled(struct spdk_bdev_desc *desc,
    5351             :                                     enum spdk_dif_check_type check_type)
    5352             : {
    5353           0 :         struct spdk_bdev *bdev = desc->bdev;
    5354             : 
    5355           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_check_enabled(bdev, check_type);
    5356             : }
    5357             : 
    5358             : static void bdev_update_qd_sampling_period(void *ctx);
    5359             : 
    5360             : static void
    5361           1 : _calculate_measured_qd_cpl(struct spdk_bdev *bdev, void *_ctx, int status)
    5362             : {
    5363           1 :         bdev->internal.measured_queue_depth = bdev->internal.temporary_queue_depth;
    5364             : 
    5365           1 :         if (bdev->internal.measured_queue_depth) {
    5366           0 :                 bdev->internal.io_time += bdev->internal.period;
    5367           0 :                 bdev->internal.weighted_io_time += bdev->internal.period * bdev->internal.measured_queue_depth;
    5368           0 :         }
    5369             : 
    5370           1 :         bdev->internal.qd_poll_in_progress = false;
    5371             : 
    5372           1 :         bdev_update_qd_sampling_period(bdev);
    5373           1 : }
    5374             : 
    5375             : static void
    5376           1 : _calculate_measured_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5377             :                        struct spdk_io_channel *io_ch, void *_ctx)
    5378             : {
    5379           1 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(io_ch);
    5380             : 
    5381           1 :         bdev->internal.temporary_queue_depth += ch->io_outstanding;
    5382           1 :         spdk_bdev_for_each_channel_continue(i, 0);
    5383           1 : }
    5384             : 
    5385             : static int
    5386           1 : bdev_calculate_measured_queue_depth(void *ctx)
    5387             : {
    5388           1 :         struct spdk_bdev *bdev = ctx;
    5389             : 
    5390           1 :         bdev->internal.qd_poll_in_progress = true;
    5391           1 :         bdev->internal.temporary_queue_depth = 0;
    5392           1 :         spdk_bdev_for_each_channel(bdev, _calculate_measured_qd, bdev, _calculate_measured_qd_cpl);
    5393           1 :         return SPDK_POLLER_BUSY;
    5394             : }
    5395             : 
    5396             : static void
    5397           5 : bdev_update_qd_sampling_period(void *ctx)
    5398             : {
    5399           5 :         struct spdk_bdev *bdev = ctx;
    5400             : 
    5401           5 :         if (bdev->internal.period == bdev->internal.new_period) {
    5402           0 :                 return;
    5403             :         }
    5404             : 
    5405           5 :         if (bdev->internal.qd_poll_in_progress) {
    5406           1 :                 return;
    5407             :         }
    5408             : 
    5409           4 :         bdev->internal.period = bdev->internal.new_period;
    5410             : 
    5411           4 :         spdk_poller_unregister(&bdev->internal.qd_poller);
    5412           4 :         if (bdev->internal.period != 0) {
    5413           2 :                 bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5414             :                                            bdev, bdev->internal.period);
    5415           2 :         } else {
    5416           2 :                 spdk_bdev_close(bdev->internal.qd_desc);
    5417           2 :                 bdev->internal.qd_desc = NULL;
    5418             :         }
    5419           5 : }
    5420             : 
    5421             : static void
    5422           0 : _tmp_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    5423             : {
    5424           0 :         SPDK_NOTICELOG("Unexpected event type: %d\n", type);
    5425           0 : }
    5426             : 
    5427             : void
    5428         135 : spdk_bdev_set_qd_sampling_period(struct spdk_bdev *bdev, uint64_t period)
    5429             : {
    5430             :         int rc;
    5431             : 
    5432         135 :         if (bdev->internal.new_period == period) {
    5433         129 :                 return;
    5434             :         }
    5435             : 
    5436           6 :         bdev->internal.new_period = period;
    5437             : 
    5438           6 :         if (bdev->internal.qd_desc != NULL) {
    5439           4 :                 assert(bdev->internal.period != 0);
    5440             : 
    5441           8 :                 spdk_thread_send_msg(bdev->internal.qd_desc->thread,
    5442           4 :                                      bdev_update_qd_sampling_period, bdev);
    5443           4 :                 return;
    5444             :         }
    5445             : 
    5446           2 :         assert(bdev->internal.period == 0);
    5447             : 
    5448           4 :         rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false, _tmp_bdev_event_cb,
    5449           2 :                                 NULL, &bdev->internal.qd_desc);
    5450           2 :         if (rc != 0) {
    5451           0 :                 return;
    5452             :         }
    5453             : 
    5454           2 :         bdev->internal.period = period;
    5455           2 :         bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5456             :                                    bdev, period);
    5457         135 : }
    5458             : 
    5459             : struct bdev_get_current_qd_ctx {
    5460             :         uint64_t current_qd;
    5461             :         spdk_bdev_get_current_qd_cb cb_fn;
    5462             :         void *cb_arg;
    5463             : };
    5464             : 
    5465             : static void
    5466           0 : bdev_get_current_qd_done(struct spdk_bdev *bdev, void *_ctx, int status)
    5467             : {
    5468           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5469             : 
    5470           0 :         ctx->cb_fn(bdev, ctx->current_qd, ctx->cb_arg, 0);
    5471             : 
    5472           0 :         free(ctx);
    5473           0 : }
    5474             : 
    5475             : static void
    5476           0 : bdev_get_current_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5477             :                     struct spdk_io_channel *io_ch, void *_ctx)
    5478             : {
    5479           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5480           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    5481             : 
    5482           0 :         ctx->current_qd += bdev_ch->io_outstanding;
    5483             : 
    5484           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    5485           0 : }
    5486             : 
    5487             : void
    5488           0 : spdk_bdev_get_current_qd(struct spdk_bdev *bdev, spdk_bdev_get_current_qd_cb cb_fn,
    5489             :                          void *cb_arg)
    5490             : {
    5491             :         struct bdev_get_current_qd_ctx *ctx;
    5492             : 
    5493           0 :         assert(cb_fn != NULL);
    5494             : 
    5495           0 :         ctx = calloc(1, sizeof(*ctx));
    5496           0 :         if (ctx == NULL) {
    5497           0 :                 cb_fn(bdev, 0, cb_arg, -ENOMEM);
    5498           0 :                 return;
    5499             :         }
    5500             : 
    5501           0 :         ctx->cb_fn = cb_fn;
    5502           0 :         ctx->cb_arg = cb_arg;
    5503             : 
    5504           0 :         spdk_bdev_for_each_channel(bdev, bdev_get_current_qd, ctx, bdev_get_current_qd_done);
    5505           0 : }
    5506             : 
    5507             : static void
    5508          25 : _event_notify(struct spdk_bdev_desc *desc, enum spdk_bdev_event_type type)
    5509             : {
    5510          25 :         assert(desc->thread == spdk_get_thread());
    5511             : 
    5512          25 :         spdk_spin_lock(&desc->spinlock);
    5513          25 :         desc->refs--;
    5514          25 :         if (!desc->closed) {
    5515          14 :                 spdk_spin_unlock(&desc->spinlock);
    5516          28 :                 desc->callback.event_fn(type,
    5517          14 :                                         desc->bdev,
    5518          14 :                                         desc->callback.ctx);
    5519          14 :                 return;
    5520          11 :         } else if (desc->refs == 0) {
    5521             :                 /* This descriptor was closed after this event_notify message was sent.
    5522             :                  * spdk_bdev_close() could not free the descriptor since this message was
    5523             :                  * in flight, so we free it now using bdev_desc_free().
    5524             :                  */
    5525          10 :                 spdk_spin_unlock(&desc->spinlock);
    5526          10 :                 bdev_desc_free(desc);
    5527          10 :                 return;
    5528             :         }
    5529           1 :         spdk_spin_unlock(&desc->spinlock);
    5530          25 : }
    5531             : 
    5532             : static void
    5533          25 : event_notify(struct spdk_bdev_desc *desc, spdk_msg_fn event_notify_fn)
    5534             : {
    5535          25 :         spdk_spin_lock(&desc->spinlock);
    5536          25 :         desc->refs++;
    5537          25 :         spdk_thread_send_msg(desc->thread, event_notify_fn, desc);
    5538          25 :         spdk_spin_unlock(&desc->spinlock);
    5539          25 : }
    5540             : 
    5541             : static void
    5542           6 : _resize_notify(void *ctx)
    5543             : {
    5544           6 :         struct spdk_bdev_desc *desc = ctx;
    5545             : 
    5546           6 :         _event_notify(desc, SPDK_BDEV_EVENT_RESIZE);
    5547           6 : }
    5548             : 
    5549             : int
    5550          11 : spdk_bdev_notify_blockcnt_change(struct spdk_bdev *bdev, uint64_t size)
    5551             : {
    5552             :         struct spdk_bdev_desc *desc;
    5553             :         int ret;
    5554             : 
    5555          11 :         if (size == bdev->blockcnt) {
    5556           0 :                 return 0;
    5557             :         }
    5558             : 
    5559          11 :         spdk_spin_lock(&bdev->internal.spinlock);
    5560             : 
    5561             :         /* bdev has open descriptors */
    5562          11 :         if (!TAILQ_EMPTY(&bdev->internal.open_descs) &&
    5563           7 :             bdev->blockcnt > size) {
    5564           1 :                 ret = -EBUSY;
    5565           1 :         } else {
    5566          10 :                 bdev->blockcnt = size;
    5567          16 :                 TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
    5568           6 :                         event_notify(desc, _resize_notify);
    5569           6 :                 }
    5570          10 :                 ret = 0;
    5571             :         }
    5572             : 
    5573          11 :         spdk_spin_unlock(&bdev->internal.spinlock);
    5574             : 
    5575          11 :         return ret;
    5576          11 : }
    5577             : 
    5578             : /*
    5579             :  * Convert I/O offset and length from bytes to blocks.
    5580             :  *
    5581             :  * Returns zero on success or non-zero if the byte parameters aren't divisible by the block size.
    5582             :  */
    5583             : static uint64_t
    5584          20 : bdev_bytes_to_blocks(struct spdk_bdev_desc *desc, uint64_t offset_bytes,
    5585             :                      uint64_t *offset_blocks, uint64_t num_bytes, uint64_t *num_blocks)
    5586             : {
    5587          20 :         uint32_t block_size = bdev_desc_get_block_size(desc);
    5588             :         uint8_t shift_cnt;
    5589             : 
    5590             :         /* Avoid expensive div operations if possible. These spdk_u32 functions are very cheap. */
    5591          20 :         if (spdk_likely(spdk_u32_is_pow2(block_size))) {
    5592          17 :                 shift_cnt = spdk_u32log2(block_size);
    5593          17 :                 *offset_blocks = offset_bytes >> shift_cnt;
    5594          17 :                 *num_blocks = num_bytes >> shift_cnt;
    5595          34 :                 return (offset_bytes - (*offset_blocks << shift_cnt)) |
    5596          17 :                        (num_bytes - (*num_blocks << shift_cnt));
    5597             :         } else {
    5598           3 :                 *offset_blocks = offset_bytes / block_size;
    5599           3 :                 *num_blocks = num_bytes / block_size;
    5600           3 :                 return (offset_bytes % block_size) | (num_bytes % block_size);
    5601             :         }
    5602          20 : }
    5603             : 
    5604             : static bool
    5605         689 : bdev_io_valid_blocks(struct spdk_bdev *bdev, uint64_t offset_blocks, uint64_t num_blocks)
    5606             : {
    5607             :         /* Return failure if offset_blocks + num_blocks is less than offset_blocks; indicates there
    5608             :          * has been an overflow and hence the offset has been wrapped around */
    5609         689 :         if (offset_blocks + num_blocks < offset_blocks) {
    5610           1 :                 return false;
    5611             :         }
    5612             : 
    5613             :         /* Return failure if offset_blocks + num_blocks exceeds the size of the bdev */
    5614         688 :         if (offset_blocks + num_blocks > bdev->blockcnt) {
    5615           2 :                 return false;
    5616             :         }
    5617             : 
    5618         686 :         return true;
    5619         689 : }
    5620             : 
    5621             : static void
    5622           2 : bdev_seek_complete_cb(void *ctx)
    5623             : {
    5624           2 :         struct spdk_bdev_io *bdev_io = ctx;
    5625             : 
    5626           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    5627           2 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    5628           2 : }
    5629             : 
    5630             : static int
    5631           4 : bdev_seek(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5632             :           uint64_t offset_blocks, enum spdk_bdev_io_type io_type,
    5633             :           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5634             : {
    5635           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5636             :         struct spdk_bdev_io *bdev_io;
    5637           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5638             : 
    5639           4 :         assert(io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA || io_type == SPDK_BDEV_IO_TYPE_SEEK_HOLE);
    5640             : 
    5641             :         /* Check if offset_blocks is valid looking at the validity of one block */
    5642           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, 1)) {
    5643           0 :                 return -EINVAL;
    5644             :         }
    5645             : 
    5646           4 :         bdev_io = bdev_channel_get_io(channel);
    5647           4 :         if (!bdev_io) {
    5648           0 :                 return -ENOMEM;
    5649             :         }
    5650             : 
    5651           4 :         bdev_io->internal.ch = channel;
    5652           4 :         bdev_io->internal.desc = desc;
    5653           4 :         bdev_io->type = io_type;
    5654           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5655           4 :         bdev_io->u.bdev.memory_domain = NULL;
    5656           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5657           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    5658           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5659             : 
    5660           4 :         if (!spdk_bdev_io_type_supported(bdev, io_type)) {
    5661             :                 /* In case bdev doesn't support seek to next data/hole offset,
    5662             :                  * it is assumed that only data and no holes are present */
    5663           2 :                 if (io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA) {
    5664           1 :                         bdev_io->u.bdev.seek.offset = offset_blocks;
    5665           1 :                 } else {
    5666           1 :                         bdev_io->u.bdev.seek.offset = UINT64_MAX;
    5667             :                 }
    5668             : 
    5669           2 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_seek_complete_cb, bdev_io);
    5670           2 :                 return 0;
    5671             :         }
    5672             : 
    5673           2 :         bdev_io_submit(bdev_io);
    5674           2 :         return 0;
    5675           4 : }
    5676             : 
    5677             : int
    5678           2 : spdk_bdev_seek_data(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5679             :                     uint64_t offset_blocks,
    5680             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5681             : {
    5682           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_DATA, cb, cb_arg);
    5683             : }
    5684             : 
    5685             : int
    5686           2 : spdk_bdev_seek_hole(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5687             :                     uint64_t offset_blocks,
    5688             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5689             : {
    5690           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_HOLE, cb, cb_arg);
    5691             : }
    5692             : 
    5693             : uint64_t
    5694           4 : spdk_bdev_io_get_seek_offset(const struct spdk_bdev_io *bdev_io)
    5695             : {
    5696           4 :         return bdev_io->u.bdev.seek.offset;
    5697             : }
    5698             : 
    5699             : static int
    5700         204 : bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch, void *buf,
    5701             :                          void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5702             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    5703             : {
    5704         204 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5705             :         struct spdk_bdev_io *bdev_io;
    5706         204 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5707             : 
    5708         204 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5709           0 :                 return -EINVAL;
    5710             :         }
    5711             : 
    5712         204 :         bdev_io = bdev_channel_get_io(channel);
    5713         204 :         if (!bdev_io) {
    5714           1 :                 return -ENOMEM;
    5715             :         }
    5716             : 
    5717         203 :         bdev_io->internal.ch = channel;
    5718         203 :         bdev_io->internal.desc = desc;
    5719         203 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5720         203 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5721         203 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5722         203 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    5723         203 :         bdev_io->u.bdev.iovcnt = 1;
    5724         203 :         bdev_io->u.bdev.md_buf = md_buf;
    5725         203 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5726         203 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5727         203 :         bdev_io->u.bdev.memory_domain = NULL;
    5728         203 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5729         203 :         bdev_io->u.bdev.accel_sequence = NULL;
    5730         203 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5731         203 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5732             : 
    5733         203 :         bdev_io_submit(bdev_io);
    5734         203 :         return 0;
    5735         204 : }
    5736             : 
    5737             : int
    5738           3 : spdk_bdev_read(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5739             :                void *buf, uint64_t offset, uint64_t nbytes,
    5740             :                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5741             : {
    5742             :         uint64_t offset_blocks, num_blocks;
    5743             : 
    5744           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5745           0 :                 return -EINVAL;
    5746             :         }
    5747             : 
    5748           3 :         return spdk_bdev_read_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    5749           3 : }
    5750             : 
    5751             : int
    5752         200 : spdk_bdev_read_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5753             :                       void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    5754             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    5755             : {
    5756         200 :         return bdev_read_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks, cb, cb_arg);
    5757             : }
    5758             : 
    5759             : int
    5760           4 : spdk_bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5761             :                               void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5762             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    5763             : {
    5764           8 :         struct iovec iov = {
    5765           4 :                 .iov_base = buf,
    5766             :         };
    5767             : 
    5768           4 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    5769           0 :                 return -EINVAL;
    5770             :         }
    5771             : 
    5772           4 :         if ((md_buf || desc->opts.hide_metadata) && !_is_buf_allocated(&iov)) {
    5773           0 :                 return -EINVAL;
    5774             :         }
    5775             : 
    5776           8 :         return bdev_read_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    5777           4 :                                         cb, cb_arg);
    5778           4 : }
    5779             : 
    5780             : int
    5781           5 : spdk_bdev_readv(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5782             :                 struct iovec *iov, int iovcnt,
    5783             :                 uint64_t offset, uint64_t nbytes,
    5784             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5785             : {
    5786             :         uint64_t offset_blocks, num_blocks;
    5787             : 
    5788           5 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5789           0 :                 return -EINVAL;
    5790             :         }
    5791             : 
    5792           5 :         return spdk_bdev_readv_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    5793           5 : }
    5794             : 
    5795             : static int
    5796         226 : bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5797             :                           struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
    5798             :                           uint64_t num_blocks, struct spdk_memory_domain *domain, void *domain_ctx,
    5799             :                           struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    5800             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5801             : {
    5802         226 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5803             :         struct spdk_bdev_io *bdev_io;
    5804         226 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5805             : 
    5806         226 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    5807           0 :                 return -EINVAL;
    5808             :         }
    5809             : 
    5810         226 :         bdev_io = bdev_channel_get_io(channel);
    5811         226 :         if (spdk_unlikely(!bdev_io)) {
    5812           2 :                 return -ENOMEM;
    5813             :         }
    5814             : 
    5815         224 :         bdev_io->internal.ch = channel;
    5816         224 :         bdev_io->internal.desc = desc;
    5817         224 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5818         224 :         bdev_io->u.bdev.iovs = iov;
    5819         224 :         bdev_io->u.bdev.iovcnt = iovcnt;
    5820         224 :         bdev_io->u.bdev.md_buf = md_buf;
    5821         224 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5822         224 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5823         224 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5824             : 
    5825         224 :         if (seq != NULL) {
    5826           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    5827           0 :                 bdev_io->internal.accel_sequence = seq;
    5828           0 :         }
    5829             : 
    5830         224 :         if (domain != NULL) {
    5831           2 :                 bdev_io->internal.f.has_memory_domain = true;
    5832           2 :                 bdev_io->internal.memory_domain = domain;
    5833           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    5834           2 :         }
    5835             : 
    5836         224 :         bdev_io->u.bdev.memory_domain = domain;
    5837         224 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    5838         224 :         bdev_io->u.bdev.accel_sequence = seq;
    5839         224 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    5840             : 
    5841         224 :         _bdev_io_submit_ext(desc, bdev_io);
    5842             : 
    5843         224 :         return 0;
    5844         226 : }
    5845             : 
    5846             : int
    5847          21 : spdk_bdev_readv_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5848             :                        struct iovec *iov, int iovcnt,
    5849             :                        uint64_t offset_blocks, uint64_t num_blocks,
    5850             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    5851             : {
    5852          21 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5853             : 
    5854          42 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    5855          21 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5856             : }
    5857             : 
    5858             : int
    5859           4 : spdk_bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5860             :                                struct iovec *iov, int iovcnt, void *md_buf,
    5861             :                                uint64_t offset_blocks, uint64_t num_blocks,
    5862             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5863             : {
    5864           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5865             : 
    5866           4 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    5867           0 :                 return -EINVAL;
    5868             :         }
    5869             : 
    5870           4 :         if (md_buf && !_is_buf_allocated(iov)) {
    5871           0 :                 return -EINVAL;
    5872             :         }
    5873             : 
    5874           8 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    5875           4 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5876           4 : }
    5877             : 
    5878             : static inline bool
    5879          14 : _bdev_io_check_opts(struct spdk_bdev_ext_io_opts *opts, struct iovec *iov)
    5880             : {
    5881             :         /*
    5882             :          * We check if opts size is at least of size when we first introduced
    5883             :          * spdk_bdev_ext_io_opts (ac6f2bdd8d) since access to those members
    5884             :          * are not checked internal.
    5885             :          */
    5886          24 :         return opts->size >= offsetof(struct spdk_bdev_ext_io_opts, metadata) +
    5887          14 :                sizeof(opts->metadata) &&
    5888          10 :                opts->size <= sizeof(*opts) &&
    5889             :                /* When memory domain is used, the user must provide data buffers */
    5890           8 :                (!opts->memory_domain || (iov && iov[0].iov_base));
    5891             : }
    5892             : 
    5893             : int
    5894           8 : spdk_bdev_readv_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5895             :                            struct iovec *iov, int iovcnt,
    5896             :                            uint64_t offset_blocks, uint64_t num_blocks,
    5897             :                            spdk_bdev_io_completion_cb cb, void *cb_arg,
    5898             :                            struct spdk_bdev_ext_io_opts *opts)
    5899             : {
    5900           8 :         struct spdk_memory_domain *domain = NULL;
    5901           8 :         struct spdk_accel_sequence *seq = NULL;
    5902           8 :         void *domain_ctx = NULL, *md = NULL;
    5903           8 :         uint32_t dif_check_flags = 0;
    5904             :         uint32_t nvme_cdw12_raw;
    5905           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5906             : 
    5907           8 :         if (opts) {
    5908           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    5909           3 :                         return -EINVAL;
    5910             :                 }
    5911             : 
    5912           4 :                 md = opts->metadata;
    5913           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    5914           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    5915           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    5916           4 :                 nvme_cdw12_raw = bdev_get_ext_io_opt(opts, nvme_cdw12.raw, 0);
    5917           4 :                 if (md) {
    5918           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    5919           0 :                                 return -EINVAL;
    5920             :                         }
    5921             : 
    5922           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    5923           0 :                                 return -EINVAL;
    5924             :                         }
    5925             : 
    5926           4 :                         if (spdk_unlikely(seq != NULL)) {
    5927           0 :                                 return -EINVAL;
    5928             :                         }
    5929             : 
    5930           4 :                         if (nvme_cdw12_raw & SPDK_DIF_FLAGS_NVME_PRACT) {
    5931           0 :                                 SPDK_ERRLOG("Separate metadata with NVMe PRACT is not supported.\n");
    5932           0 :                                 return -ENOTSUP;
    5933             :                         }
    5934           4 :                 }
    5935             : 
    5936           4 :                 if (nvme_cdw12_raw & SPDK_DIF_FLAGS_NVME_PRACT) {
    5937           0 :                         dif_check_flags |= SPDK_DIF_FLAGS_NVME_PRACT;
    5938           0 :                 }
    5939           4 :         }
    5940             : 
    5941          10 :         dif_check_flags |= bdev->dif_check_flags &
    5942           5 :                            ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    5943             : 
    5944          10 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks,
    5945           5 :                                          num_blocks, domain, domain_ctx, seq, dif_check_flags, cb, cb_arg);
    5946           8 : }
    5947             : 
    5948             : static int
    5949          36 : bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5950             :                           void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5951             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5952             : {
    5953          36 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5954             :         struct spdk_bdev_io *bdev_io;
    5955          36 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5956             : 
    5957          36 :         if (!desc->write) {
    5958           0 :                 return -EBADF;
    5959             :         }
    5960             : 
    5961          36 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5962           0 :                 return -EINVAL;
    5963             :         }
    5964             : 
    5965          36 :         bdev_io = bdev_channel_get_io(channel);
    5966          36 :         if (!bdev_io) {
    5967           0 :                 return -ENOMEM;
    5968             :         }
    5969             : 
    5970          36 :         bdev_io->internal.ch = channel;
    5971          36 :         bdev_io->internal.desc = desc;
    5972          36 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    5973          36 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5974          36 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5975          36 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    5976          36 :         bdev_io->u.bdev.iovcnt = 1;
    5977          36 :         bdev_io->u.bdev.md_buf = md_buf;
    5978          36 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5979          36 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5980          36 :         bdev_io->u.bdev.memory_domain = NULL;
    5981          36 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5982          36 :         bdev_io->u.bdev.accel_sequence = NULL;
    5983          36 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5984          36 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5985             : 
    5986          36 :         bdev_io_submit(bdev_io);
    5987          36 :         return 0;
    5988          36 : }
    5989             : 
    5990             : int
    5991           3 : spdk_bdev_write(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5992             :                 void *buf, uint64_t offset, uint64_t nbytes,
    5993             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5994             : {
    5995             :         uint64_t offset_blocks, num_blocks;
    5996             : 
    5997           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5998           0 :                 return -EINVAL;
    5999             :         }
    6000             : 
    6001           3 :         return spdk_bdev_write_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    6002           3 : }
    6003             : 
    6004             : int
    6005          27 : spdk_bdev_write_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6006             :                        void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    6007             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6008             : {
    6009          54 :         return bdev_write_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    6010          27 :                                          cb, cb_arg);
    6011             : }
    6012             : 
    6013             : int
    6014           3 : spdk_bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6015             :                                void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6016             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    6017             : {
    6018           6 :         struct iovec iov = {
    6019           3 :                 .iov_base = buf,
    6020             :         };
    6021             : 
    6022           3 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6023           0 :                 return -EINVAL;
    6024             :         }
    6025             : 
    6026           3 :         if (md_buf && !_is_buf_allocated(&iov)) {
    6027           0 :                 return -EINVAL;
    6028             :         }
    6029             : 
    6030           6 :         return bdev_write_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    6031           3 :                                          cb, cb_arg);
    6032           3 : }
    6033             : 
    6034             : static int
    6035          70 : bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6036             :                            struct iovec *iov, int iovcnt, void *md_buf,
    6037             :                            uint64_t offset_blocks, uint64_t num_blocks,
    6038             :                            struct spdk_memory_domain *domain, void *domain_ctx,
    6039             :                            struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    6040             :                            uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
    6041             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    6042             : {
    6043          70 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6044             :         struct spdk_bdev_io *bdev_io;
    6045          70 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6046             : 
    6047          70 :         if (spdk_unlikely(!desc->write)) {
    6048           0 :                 return -EBADF;
    6049             :         }
    6050             : 
    6051          70 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    6052           0 :                 return -EINVAL;
    6053             :         }
    6054             : 
    6055          70 :         bdev_io = bdev_channel_get_io(channel);
    6056          70 :         if (spdk_unlikely(!bdev_io)) {
    6057           2 :                 return -ENOMEM;
    6058             :         }
    6059             : 
    6060          68 :         bdev_io->internal.ch = channel;
    6061          68 :         bdev_io->internal.desc = desc;
    6062          68 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    6063          68 :         bdev_io->u.bdev.iovs = iov;
    6064          68 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6065          68 :         bdev_io->u.bdev.md_buf = md_buf;
    6066          68 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6067          68 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6068          68 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6069          68 :         if (seq != NULL) {
    6070           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    6071           0 :                 bdev_io->internal.accel_sequence = seq;
    6072           0 :         }
    6073             : 
    6074          68 :         if (domain != NULL) {
    6075           2 :                 bdev_io->internal.f.has_memory_domain = true;
    6076           2 :                 bdev_io->internal.memory_domain = domain;
    6077           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    6078           2 :         }
    6079             : 
    6080          68 :         bdev_io->u.bdev.memory_domain = domain;
    6081          68 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    6082          68 :         bdev_io->u.bdev.accel_sequence = seq;
    6083          68 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    6084          68 :         bdev_io->u.bdev.nvme_cdw12.raw = nvme_cdw12_raw;
    6085          68 :         bdev_io->u.bdev.nvme_cdw13.raw = nvme_cdw13_raw;
    6086             : 
    6087          68 :         _bdev_io_submit_ext(desc, bdev_io);
    6088             : 
    6089          68 :         return 0;
    6090          70 : }
    6091             : 
    6092             : int
    6093           3 : spdk_bdev_writev(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6094             :                  struct iovec *iov, int iovcnt,
    6095             :                  uint64_t offset, uint64_t len,
    6096             :                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    6097             : {
    6098             :         uint64_t offset_blocks, num_blocks;
    6099             : 
    6100           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    6101           0 :                 return -EINVAL;
    6102             :         }
    6103             : 
    6104           3 :         return spdk_bdev_writev_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    6105           3 : }
    6106             : 
    6107             : int
    6108          14 : spdk_bdev_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6109             :                         struct iovec *iov, int iovcnt,
    6110             :                         uint64_t offset_blocks, uint64_t num_blocks,
    6111             :                         spdk_bdev_io_completion_cb cb, void *cb_arg)
    6112             : {
    6113          14 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6114             : 
    6115          28 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    6116          14 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    6117          14 :                                           cb, cb_arg);
    6118             : }
    6119             : 
    6120             : int
    6121           1 : spdk_bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6122             :                                 struct iovec *iov, int iovcnt, void *md_buf,
    6123             :                                 uint64_t offset_blocks, uint64_t num_blocks,
    6124             :                                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6125             : {
    6126           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6127             : 
    6128           1 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    6129           0 :                 return -EINVAL;
    6130             :         }
    6131             : 
    6132           1 :         if (md_buf && !_is_buf_allocated(iov)) {
    6133           0 :                 return -EINVAL;
    6134             :         }
    6135             : 
    6136           2 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    6137           1 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    6138           1 :                                           cb, cb_arg);
    6139           1 : }
    6140             : 
    6141             : int
    6142           8 : spdk_bdev_writev_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6143             :                             struct iovec *iov, int iovcnt,
    6144             :                             uint64_t offset_blocks, uint64_t num_blocks,
    6145             :                             spdk_bdev_io_completion_cb cb, void *cb_arg,
    6146             :                             struct spdk_bdev_ext_io_opts *opts)
    6147             : {
    6148           8 :         struct spdk_memory_domain *domain = NULL;
    6149           8 :         struct spdk_accel_sequence *seq = NULL;
    6150           8 :         void *domain_ctx = NULL, *md = NULL;
    6151           8 :         uint32_t dif_check_flags = 0;
    6152           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6153           8 :         uint32_t nvme_cdw12_raw = 0;
    6154           8 :         uint32_t nvme_cdw13_raw = 0;
    6155             : 
    6156           8 :         if (opts) {
    6157           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    6158           3 :                         return -EINVAL;
    6159             :                 }
    6160           4 :                 md = opts->metadata;
    6161           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    6162           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    6163           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    6164           4 :                 nvme_cdw12_raw = bdev_get_ext_io_opt(opts, nvme_cdw12.raw, 0);
    6165           4 :                 nvme_cdw13_raw = bdev_get_ext_io_opt(opts, nvme_cdw13.raw, 0);
    6166           4 :                 if (md) {
    6167           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    6168           0 :                                 return -EINVAL;
    6169             :                         }
    6170             : 
    6171           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    6172           0 :                                 return -EINVAL;
    6173             :                         }
    6174             : 
    6175           4 :                         if (spdk_unlikely(seq != NULL)) {
    6176           0 :                                 return -EINVAL;
    6177             :                         }
    6178             : 
    6179           4 :                         if (nvme_cdw12_raw & SPDK_DIF_FLAGS_NVME_PRACT) {
    6180           0 :                                 SPDK_ERRLOG("Separate metadata with NVMe PRACT is not supported.\n");
    6181           0 :                                 return -ENOTSUP;
    6182             :                         }
    6183           4 :                 }
    6184             : 
    6185           4 :                 if (nvme_cdw12_raw & SPDK_DIF_FLAGS_NVME_PRACT) {
    6186           0 :                         dif_check_flags |= SPDK_DIF_FLAGS_NVME_PRACT;
    6187           0 :                 }
    6188           4 :         }
    6189             : 
    6190          10 :         dif_check_flags |= bdev->dif_check_flags &
    6191           5 :                            ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    6192             : 
    6193          10 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks, num_blocks,
    6194           5 :                                           domain, domain_ctx, seq, dif_check_flags,
    6195           5 :                                           nvme_cdw12_raw, nvme_cdw13_raw, cb, cb_arg);
    6196           8 : }
    6197             : 
    6198             : static void
    6199          11 : bdev_compare_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6200             : {
    6201          11 :         struct spdk_bdev_io *parent_io = cb_arg;
    6202          11 :         struct spdk_bdev *bdev = parent_io->bdev;
    6203          11 :         uint8_t *read_buf = bdev_io->u.bdev.iovs[0].iov_base;
    6204          11 :         int i, rc = 0;
    6205             : 
    6206          11 :         if (!success) {
    6207           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    6208           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    6209           0 :                 spdk_bdev_free_io(bdev_io);
    6210           0 :                 return;
    6211             :         }
    6212             : 
    6213          17 :         for (i = 0; i < parent_io->u.bdev.iovcnt; i++) {
    6214          22 :                 rc = memcmp(read_buf,
    6215          11 :                             parent_io->u.bdev.iovs[i].iov_base,
    6216          11 :                             parent_io->u.bdev.iovs[i].iov_len);
    6217          11 :                 if (rc) {
    6218           5 :                         break;
    6219             :                 }
    6220           6 :                 read_buf += parent_io->u.bdev.iovs[i].iov_len;
    6221           6 :         }
    6222             : 
    6223          11 :         if (rc == 0 && parent_io->u.bdev.md_buf && spdk_bdev_is_md_separate(bdev)) {
    6224           4 :                 rc = memcmp(bdev_io->u.bdev.md_buf,
    6225           2 :                             parent_io->u.bdev.md_buf,
    6226           2 :                             spdk_bdev_get_md_size(bdev));
    6227           2 :         }
    6228             : 
    6229          11 :         spdk_bdev_free_io(bdev_io);
    6230             : 
    6231          11 :         if (rc == 0) {
    6232           5 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    6233           5 :                 parent_io->internal.cb(parent_io, true, parent_io->internal.caller_ctx);
    6234           5 :         } else {
    6235           6 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_MISCOMPARE;
    6236           6 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    6237             :         }
    6238          11 : }
    6239             : 
    6240             : static void
    6241          11 : bdev_compare_do_read(void *_bdev_io)
    6242             : {
    6243          11 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6244             :         int rc;
    6245             : 
    6246          22 :         rc = spdk_bdev_read_blocks(bdev_io->internal.desc,
    6247          11 :                                    spdk_io_channel_from_ctx(bdev_io->internal.ch), NULL,
    6248          11 :                                    bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6249          11 :                                    bdev_compare_do_read_done, bdev_io);
    6250             : 
    6251          11 :         if (rc == -ENOMEM) {
    6252           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_do_read);
    6253          11 :         } else if (rc != 0) {
    6254           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    6255           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    6256           0 :         }
    6257          11 : }
    6258             : 
    6259             : static int
    6260          16 : bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6261             :                              struct iovec *iov, int iovcnt, void *md_buf,
    6262             :                              uint64_t offset_blocks, uint64_t num_blocks,
    6263             :                              spdk_bdev_io_completion_cb cb, void *cb_arg)
    6264             : {
    6265          16 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6266             :         struct spdk_bdev_io *bdev_io;
    6267          16 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6268             : 
    6269          16 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6270           0 :                 return -EINVAL;
    6271             :         }
    6272             : 
    6273          16 :         bdev_io = bdev_channel_get_io(channel);
    6274          16 :         if (!bdev_io) {
    6275           0 :                 return -ENOMEM;
    6276             :         }
    6277             : 
    6278          16 :         bdev_io->internal.ch = channel;
    6279          16 :         bdev_io->internal.desc = desc;
    6280          16 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6281          16 :         bdev_io->u.bdev.iovs = iov;
    6282          16 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6283          16 :         bdev_io->u.bdev.md_buf = md_buf;
    6284          16 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6285          16 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6286          16 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6287          16 :         bdev_io->u.bdev.memory_domain = NULL;
    6288          16 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6289          16 :         bdev_io->u.bdev.accel_sequence = NULL;
    6290             : 
    6291          16 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6292           7 :                 bdev_io_submit(bdev_io);
    6293           7 :                 return 0;
    6294             :         }
    6295             : 
    6296           9 :         bdev_compare_do_read(bdev_io);
    6297             : 
    6298           9 :         return 0;
    6299          16 : }
    6300             : 
    6301             : int
    6302          10 : spdk_bdev_comparev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6303             :                           struct iovec *iov, int iovcnt,
    6304             :                           uint64_t offset_blocks, uint64_t num_blocks,
    6305             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    6306             : {
    6307          20 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    6308          10 :                                             num_blocks, cb, cb_arg);
    6309             : }
    6310             : 
    6311             : int
    6312           6 : spdk_bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6313             :                                   struct iovec *iov, int iovcnt, void *md_buf,
    6314             :                                   uint64_t offset_blocks, uint64_t num_blocks,
    6315             :                                   spdk_bdev_io_completion_cb cb, void *cb_arg)
    6316             : {
    6317           6 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6318           0 :                 return -EINVAL;
    6319             :         }
    6320             : 
    6321           6 :         if (md_buf && !_is_buf_allocated(iov)) {
    6322           0 :                 return -EINVAL;
    6323             :         }
    6324             : 
    6325          12 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    6326           6 :                                             num_blocks, cb, cb_arg);
    6327           6 : }
    6328             : 
    6329             : static int
    6330           4 : bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6331             :                             void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6332             :                             spdk_bdev_io_completion_cb cb, void *cb_arg)
    6333             : {
    6334           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6335             :         struct spdk_bdev_io *bdev_io;
    6336           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6337             : 
    6338           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6339           0 :                 return -EINVAL;
    6340             :         }
    6341             : 
    6342           4 :         bdev_io = bdev_channel_get_io(channel);
    6343           4 :         if (!bdev_io) {
    6344           0 :                 return -ENOMEM;
    6345             :         }
    6346             : 
    6347           4 :         bdev_io->internal.ch = channel;
    6348           4 :         bdev_io->internal.desc = desc;
    6349           4 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6350           4 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6351           4 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    6352           4 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev_desc_get_block_size(desc);
    6353           4 :         bdev_io->u.bdev.iovcnt = 1;
    6354           4 :         bdev_io->u.bdev.md_buf = md_buf;
    6355           4 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6356           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6357           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6358           4 :         bdev_io->u.bdev.memory_domain = NULL;
    6359           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6360           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    6361             : 
    6362           4 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6363           2 :                 bdev_io_submit(bdev_io);
    6364           2 :                 return 0;
    6365             :         }
    6366             : 
    6367           2 :         bdev_compare_do_read(bdev_io);
    6368             : 
    6369           2 :         return 0;
    6370           4 : }
    6371             : 
    6372             : int
    6373           4 : spdk_bdev_compare_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6374             :                          void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    6375             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    6376             : {
    6377           8 :         return bdev_compare_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    6378           4 :                                            cb, cb_arg);
    6379             : }
    6380             : 
    6381             : int
    6382           0 : spdk_bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6383             :                                  void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6384             :                                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    6385             : {
    6386           0 :         struct iovec iov = {
    6387           0 :                 .iov_base = buf,
    6388             :         };
    6389             : 
    6390           0 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6391           0 :                 return -EINVAL;
    6392             :         }
    6393             : 
    6394           0 :         if (md_buf && !_is_buf_allocated(&iov)) {
    6395           0 :                 return -EINVAL;
    6396             :         }
    6397             : 
    6398           0 :         return bdev_compare_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    6399           0 :                                            cb, cb_arg);
    6400           0 : }
    6401             : 
    6402             : static void
    6403           2 : bdev_comparev_and_writev_blocks_unlocked(struct lba_range *range, void *ctx, int unlock_status)
    6404             : {
    6405           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6406             : 
    6407           2 :         if (unlock_status) {
    6408           0 :                 SPDK_ERRLOG("LBA range unlock failed\n");
    6409           0 :         }
    6410             : 
    6411           4 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS ? true :
    6412           2 :                              false, bdev_io->internal.caller_ctx);
    6413           2 : }
    6414             : 
    6415             : static void
    6416           2 : bdev_comparev_and_writev_blocks_unlock(struct spdk_bdev_io *bdev_io, int status)
    6417             : {
    6418           2 :         bdev_io->internal.status = status;
    6419             : 
    6420           4 :         bdev_unlock_lba_range(bdev_io->internal.desc, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6421           2 :                               bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6422           2 :                               bdev_comparev_and_writev_blocks_unlocked, bdev_io);
    6423           2 : }
    6424             : 
    6425             : static void
    6426           1 : bdev_compare_and_write_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6427             : {
    6428           1 :         struct spdk_bdev_io *parent_io = cb_arg;
    6429             : 
    6430           1 :         if (!success) {
    6431           0 :                 SPDK_ERRLOG("Compare and write operation failed\n");
    6432           0 :         }
    6433             : 
    6434           1 :         spdk_bdev_free_io(bdev_io);
    6435             : 
    6436           2 :         bdev_comparev_and_writev_blocks_unlock(parent_io,
    6437           1 :                                                success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED);
    6438           1 : }
    6439             : 
    6440             : static void
    6441           1 : bdev_compare_and_write_do_write(void *_bdev_io)
    6442             : {
    6443           1 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6444             :         int rc;
    6445             : 
    6446           2 :         rc = spdk_bdev_writev_blocks(bdev_io->internal.desc,
    6447           1 :                                      spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6448           1 :                                      bdev_io->u.bdev.fused_iovs, bdev_io->u.bdev.fused_iovcnt,
    6449           1 :                                      bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6450           1 :                                      bdev_compare_and_write_do_write_done, bdev_io);
    6451             : 
    6452             : 
    6453           1 :         if (rc == -ENOMEM) {
    6454           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_write);
    6455           1 :         } else if (rc != 0) {
    6456           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6457           0 :         }
    6458           1 : }
    6459             : 
    6460             : static void
    6461           2 : bdev_compare_and_write_do_compare_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6462             : {
    6463           2 :         struct spdk_bdev_io *parent_io = cb_arg;
    6464             : 
    6465           2 :         spdk_bdev_free_io(bdev_io);
    6466             : 
    6467           2 :         if (!success) {
    6468           1 :                 bdev_comparev_and_writev_blocks_unlock(parent_io, SPDK_BDEV_IO_STATUS_MISCOMPARE);
    6469           1 :                 return;
    6470             :         }
    6471             : 
    6472           1 :         bdev_compare_and_write_do_write(parent_io);
    6473           2 : }
    6474             : 
    6475             : static void
    6476           2 : bdev_compare_and_write_do_compare(void *_bdev_io)
    6477             : {
    6478           2 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6479             :         int rc;
    6480             : 
    6481           4 :         rc = spdk_bdev_comparev_blocks(bdev_io->internal.desc,
    6482           2 :                                        spdk_io_channel_from_ctx(bdev_io->internal.ch), bdev_io->u.bdev.iovs,
    6483           2 :                                        bdev_io->u.bdev.iovcnt, bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6484           2 :                                        bdev_compare_and_write_do_compare_done, bdev_io);
    6485             : 
    6486           2 :         if (rc == -ENOMEM) {
    6487           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_compare);
    6488           2 :         } else if (rc != 0) {
    6489           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED);
    6490           0 :         }
    6491           2 : }
    6492             : 
    6493             : static void
    6494           2 : bdev_comparev_and_writev_blocks_locked(struct lba_range *range, void *ctx, int status)
    6495             : {
    6496           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6497             : 
    6498           2 :         if (status) {
    6499           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED;
    6500           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    6501           0 :                 return;
    6502             :         }
    6503             : 
    6504           2 :         bdev_compare_and_write_do_compare(bdev_io);
    6505           2 : }
    6506             : 
    6507             : int
    6508           2 : spdk_bdev_comparev_and_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6509             :                                      struct iovec *compare_iov, int compare_iovcnt,
    6510             :                                      struct iovec *write_iov, int write_iovcnt,
    6511             :                                      uint64_t offset_blocks, uint64_t num_blocks,
    6512             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg)
    6513             : {
    6514           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6515             :         struct spdk_bdev_io *bdev_io;
    6516           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6517             : 
    6518           2 :         if (!desc->write) {
    6519           0 :                 return -EBADF;
    6520             :         }
    6521             : 
    6522           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6523           0 :                 return -EINVAL;
    6524             :         }
    6525             : 
    6526           2 :         if (num_blocks > bdev->acwu) {
    6527           0 :                 return -EINVAL;
    6528             :         }
    6529             : 
    6530           2 :         bdev_io = bdev_channel_get_io(channel);
    6531           2 :         if (!bdev_io) {
    6532           0 :                 return -ENOMEM;
    6533             :         }
    6534             : 
    6535           2 :         bdev_io->internal.ch = channel;
    6536           2 :         bdev_io->internal.desc = desc;
    6537           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE;
    6538           2 :         bdev_io->u.bdev.iovs = compare_iov;
    6539           2 :         bdev_io->u.bdev.iovcnt = compare_iovcnt;
    6540           2 :         bdev_io->u.bdev.fused_iovs = write_iov;
    6541           2 :         bdev_io->u.bdev.fused_iovcnt = write_iovcnt;
    6542           2 :         bdev_io->u.bdev.md_buf = NULL;
    6543           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6544           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6545           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6546           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6547           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6548           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6549             : 
    6550           2 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE)) {
    6551           0 :                 bdev_io_submit(bdev_io);
    6552           0 :                 return 0;
    6553             :         }
    6554             : 
    6555           4 :         return bdev_lock_lba_range(desc, ch, offset_blocks, num_blocks,
    6556           2 :                                    bdev_comparev_and_writev_blocks_locked, bdev_io);
    6557           2 : }
    6558             : 
    6559             : int
    6560           2 : spdk_bdev_zcopy_start(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6561             :                       struct iovec *iov, int iovcnt,
    6562             :                       uint64_t offset_blocks, uint64_t num_blocks,
    6563             :                       bool populate,
    6564             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    6565             : {
    6566           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6567             :         struct spdk_bdev_io *bdev_io;
    6568           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6569             : 
    6570           2 :         if (!desc->write) {
    6571           0 :                 return -EBADF;
    6572             :         }
    6573             : 
    6574           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6575           0 :                 return -EINVAL;
    6576             :         }
    6577             : 
    6578           2 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ZCOPY)) {
    6579           0 :                 return -ENOTSUP;
    6580             :         }
    6581             : 
    6582           2 :         bdev_io = bdev_channel_get_io(channel);
    6583           2 :         if (!bdev_io) {
    6584           0 :                 return -ENOMEM;
    6585             :         }
    6586             : 
    6587           2 :         bdev_io->internal.ch = channel;
    6588           2 :         bdev_io->internal.desc = desc;
    6589           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ZCOPY;
    6590           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6591           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6592           2 :         bdev_io->u.bdev.iovs = iov;
    6593           2 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6594           2 :         bdev_io->u.bdev.md_buf = NULL;
    6595           2 :         bdev_io->u.bdev.zcopy.populate = populate ? 1 : 0;
    6596           2 :         bdev_io->u.bdev.zcopy.commit = 0;
    6597           2 :         bdev_io->u.bdev.zcopy.start = 1;
    6598           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6599           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6600           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6601           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6602             : 
    6603           2 :         bdev_io_submit(bdev_io);
    6604             : 
    6605           2 :         return 0;
    6606           2 : }
    6607             : 
    6608             : int
    6609           2 : spdk_bdev_zcopy_end(struct spdk_bdev_io *bdev_io, bool commit,
    6610             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    6611             : {
    6612           2 :         if (bdev_io->type != SPDK_BDEV_IO_TYPE_ZCOPY) {
    6613           0 :                 return -EINVAL;
    6614             :         }
    6615             : 
    6616           2 :         bdev_io->u.bdev.zcopy.commit = commit ? 1 : 0;
    6617           2 :         bdev_io->u.bdev.zcopy.start = 0;
    6618           2 :         bdev_io->internal.caller_ctx = cb_arg;
    6619           2 :         bdev_io->internal.cb = cb;
    6620           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    6621             : 
    6622           2 :         bdev_io_submit(bdev_io);
    6623             : 
    6624           2 :         return 0;
    6625           2 : }
    6626             : 
    6627             : int
    6628           0 : spdk_bdev_write_zeroes(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6629             :                        uint64_t offset, uint64_t len,
    6630             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6631             : {
    6632             :         uint64_t offset_blocks, num_blocks;
    6633             : 
    6634           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    6635           0 :                 return -EINVAL;
    6636             :         }
    6637             : 
    6638           0 :         return spdk_bdev_write_zeroes_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6639           0 : }
    6640             : 
    6641             : int
    6642          33 : spdk_bdev_write_zeroes_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6643             :                               uint64_t offset_blocks, uint64_t num_blocks,
    6644             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6645             : {
    6646          33 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6647             :         struct spdk_bdev_io *bdev_io;
    6648          33 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6649             : 
    6650          33 :         if (!desc->write) {
    6651           0 :                 return -EBADF;
    6652             :         }
    6653             : 
    6654          33 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6655           0 :                 return -EINVAL;
    6656             :         }
    6657             : 
    6658          33 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) &&
    6659          10 :             !bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE)) {
    6660           1 :                 return -ENOTSUP;
    6661             :         }
    6662             : 
    6663          32 :         bdev_io = bdev_channel_get_io(channel);
    6664             : 
    6665          32 :         if (!bdev_io) {
    6666           0 :                 return -ENOMEM;
    6667             :         }
    6668             : 
    6669          32 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE_ZEROES;
    6670          32 :         bdev_io->internal.ch = channel;
    6671          32 :         bdev_io->internal.desc = desc;
    6672          32 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6673          32 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6674          32 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6675          32 :         bdev_io->u.bdev.memory_domain = NULL;
    6676          32 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6677          32 :         bdev_io->u.bdev.accel_sequence = NULL;
    6678             : 
    6679             :         /* If the write_zeroes size is large and should be split, use the generic split
    6680             :          * logic regardless of whether SPDK_BDEV_IO_TYPE_WRITE_ZEREOS is supported or not.
    6681             :          *
    6682             :          * Then, send the write_zeroes request if SPDK_BDEV_IO_TYPE_WRITE_ZEROES is supported
    6683             :          * or emulate it using regular write request otherwise.
    6684             :          */
    6685          32 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) ||
    6686           9 :             bdev_io->internal.f.split) {
    6687          26 :                 bdev_io_submit(bdev_io);
    6688          26 :                 return 0;
    6689             :         }
    6690             : 
    6691           6 :         assert(_bdev_get_block_size_with_md(bdev) <= ZERO_BUFFER_SIZE);
    6692             : 
    6693           6 :         return bdev_write_zero_buffer(bdev_io);
    6694          33 : }
    6695             : 
    6696             : int
    6697           0 : spdk_bdev_unmap(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6698             :                 uint64_t offset, uint64_t nbytes,
    6699             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6700             : {
    6701             :         uint64_t offset_blocks, num_blocks;
    6702             : 
    6703           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    6704           0 :                 return -EINVAL;
    6705             :         }
    6706             : 
    6707           0 :         return spdk_bdev_unmap_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6708           0 : }
    6709             : 
    6710             : static void
    6711           0 : bdev_io_complete_cb(void *ctx)
    6712             : {
    6713           0 :         struct spdk_bdev_io *bdev_io = ctx;
    6714             : 
    6715           0 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    6716           0 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    6717           0 : }
    6718             : 
    6719             : int
    6720          22 : spdk_bdev_unmap_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6721             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6722             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6723             : {
    6724          22 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6725             :         struct spdk_bdev_io *bdev_io;
    6726          22 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6727             : 
    6728          22 :         if (!desc->write) {
    6729           0 :                 return -EBADF;
    6730             :         }
    6731             : 
    6732          22 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6733           0 :                 return -EINVAL;
    6734             :         }
    6735             : 
    6736          22 :         bdev_io = bdev_channel_get_io(channel);
    6737          22 :         if (!bdev_io) {
    6738           0 :                 return -ENOMEM;
    6739             :         }
    6740             : 
    6741          22 :         bdev_io->internal.ch = channel;
    6742          22 :         bdev_io->internal.desc = desc;
    6743          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_UNMAP;
    6744             : 
    6745          22 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6746          22 :         bdev_io->u.bdev.iovs[0].iov_base = NULL;
    6747          22 :         bdev_io->u.bdev.iovs[0].iov_len = 0;
    6748          22 :         bdev_io->u.bdev.iovcnt = 1;
    6749             : 
    6750          22 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6751          22 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6752          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6753          22 :         bdev_io->u.bdev.memory_domain = NULL;
    6754          22 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6755          22 :         bdev_io->u.bdev.accel_sequence = NULL;
    6756             : 
    6757          22 :         if (num_blocks == 0) {
    6758           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
    6759           0 :                 return 0;
    6760             :         }
    6761             : 
    6762          22 :         bdev_io_submit(bdev_io);
    6763          22 :         return 0;
    6764          22 : }
    6765             : 
    6766             : int
    6767           0 : spdk_bdev_flush(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6768             :                 uint64_t offset, uint64_t length,
    6769             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6770             : {
    6771             :         uint64_t offset_blocks, num_blocks;
    6772             : 
    6773           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, length, &num_blocks) != 0) {
    6774           0 :                 return -EINVAL;
    6775             :         }
    6776             : 
    6777           0 :         return spdk_bdev_flush_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6778           0 : }
    6779             : 
    6780             : int
    6781           2 : spdk_bdev_flush_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6782             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6783             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6784             : {
    6785           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6786             :         struct spdk_bdev_io *bdev_io;
    6787           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6788             : 
    6789           2 :         if (!desc->write) {
    6790           0 :                 return -EBADF;
    6791             :         }
    6792             : 
    6793           2 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_FLUSH))) {
    6794           0 :                 return -ENOTSUP;
    6795             :         }
    6796             : 
    6797           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6798           0 :                 return -EINVAL;
    6799             :         }
    6800             : 
    6801           2 :         bdev_io = bdev_channel_get_io(channel);
    6802           2 :         if (!bdev_io) {
    6803           0 :                 return -ENOMEM;
    6804             :         }
    6805             : 
    6806           2 :         bdev_io->internal.ch = channel;
    6807           2 :         bdev_io->internal.desc = desc;
    6808           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_FLUSH;
    6809           2 :         bdev_io->u.bdev.iovs = NULL;
    6810           2 :         bdev_io->u.bdev.iovcnt = 0;
    6811           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6812           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6813           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6814           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6815           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6816           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6817             : 
    6818           2 :         bdev_io_submit(bdev_io);
    6819           2 :         return 0;
    6820           2 : }
    6821             : 
    6822             : static int bdev_reset_poll_for_outstanding_io(void *ctx);
    6823             : 
    6824             : static void
    6825          13 : bdev_reset_check_outstanding_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6826             : {
    6827          13 :         struct spdk_bdev_io *bdev_io = _ctx;
    6828          13 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    6829             : 
    6830          13 :         if (status == -EBUSY) {
    6831           9 :                 if (spdk_get_ticks() < bdev_io->u.reset.wait_poller.stop_time_tsc) {
    6832           8 :                         bdev_io->u.reset.wait_poller.poller = SPDK_POLLER_REGISTER(bdev_reset_poll_for_outstanding_io,
    6833             :                                                               bdev_io, BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD);
    6834           8 :                 } else {
    6835           1 :                         if (TAILQ_EMPTY(&ch->io_memory_domain) && TAILQ_EMPTY(&ch->io_accel_exec)) {
    6836             :                                 /* If outstanding IOs are still present and reset_io_drain_timeout
    6837             :                                  * seconds passed, start the reset. */
    6838           1 :                                 bdev_io_submit_reset(bdev_io);
    6839           1 :                         } else {
    6840             :                                 /* We still have in progress memory domain pull/push or we're
    6841             :                                  * executing accel sequence.  Since we cannot abort either of those
    6842             :                                  * operations, fail the reset request. */
    6843           0 :                                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6844             :                         }
    6845             :                 }
    6846           9 :         } else {
    6847           4 :                 SPDK_DEBUGLOG(bdev,
    6848             :                               "Skipping reset for underlying device of bdev: %s - no outstanding I/O.\n",
    6849             :                               ch->bdev->name);
    6850             :                 /* Mark the completion status as a SUCCESS and complete the reset. */
    6851           4 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    6852             :         }
    6853          13 : }
    6854             : 
    6855             : static void
    6856          13 : bdev_reset_check_outstanding_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6857             :                                 struct spdk_io_channel *io_ch, void *_ctx)
    6858             : {
    6859          13 :         struct spdk_bdev_channel *cur_ch = __io_ch_to_bdev_ch(io_ch);
    6860          13 :         int status = 0;
    6861             : 
    6862          17 :         if (cur_ch->io_outstanding > 0 ||
    6863           4 :             !TAILQ_EMPTY(&cur_ch->io_memory_domain) ||
    6864           4 :             !TAILQ_EMPTY(&cur_ch->io_accel_exec)) {
    6865             :                 /* If a channel has outstanding IO, set status to -EBUSY code. This will stop
    6866             :                  * further iteration over the rest of the channels and pass non-zero status
    6867             :                  * to the callback function. */
    6868           9 :                 status = -EBUSY;
    6869           9 :         }
    6870          13 :         spdk_bdev_for_each_channel_continue(i, status);
    6871          13 : }
    6872             : 
    6873             : static int
    6874           8 : bdev_reset_poll_for_outstanding_io(void *ctx)
    6875             : {
    6876           8 :         struct spdk_bdev_io *bdev_io = ctx;
    6877             : 
    6878           8 :         spdk_poller_unregister(&bdev_io->u.reset.wait_poller.poller);
    6879           8 :         spdk_bdev_for_each_channel(bdev_io->bdev, bdev_reset_check_outstanding_io, bdev_io,
    6880             :                                    bdev_reset_check_outstanding_io_done);
    6881             : 
    6882           8 :         return SPDK_POLLER_BUSY;
    6883             : }
    6884             : 
    6885             : static void
    6886          16 : bdev_reset_freeze_channel_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6887             : {
    6888          16 :         struct spdk_bdev_io *bdev_io = _ctx;
    6889             : 
    6890          16 :         if (bdev->reset_io_drain_timeout == 0) {
    6891          11 :                 bdev_io_submit_reset(bdev_io);
    6892          11 :                 return;
    6893             :         }
    6894             : 
    6895          10 :         bdev_io->u.reset.wait_poller.stop_time_tsc = spdk_get_ticks() +
    6896           5 :                         (bdev->reset_io_drain_timeout * spdk_get_ticks_hz());
    6897             : 
    6898             :         /* In case bdev->reset_io_drain_timeout is not equal to zero,
    6899             :          * submit the reset to the underlying module only if outstanding I/O
    6900             :          * remain after reset_io_drain_timeout seconds have passed. */
    6901           5 :         spdk_bdev_for_each_channel(bdev, bdev_reset_check_outstanding_io, bdev_io,
    6902             :                                    bdev_reset_check_outstanding_io_done);
    6903          16 : }
    6904             : 
    6905             : static void
    6906          19 : bdev_reset_freeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6907             :                           struct spdk_io_channel *ch, void *_ctx)
    6908             : {
    6909             :         struct spdk_bdev_channel        *channel;
    6910             :         struct spdk_bdev_mgmt_channel   *mgmt_channel;
    6911             :         struct spdk_bdev_shared_resource *shared_resource;
    6912             :         bdev_io_tailq_t                 tmp_queued;
    6913             : 
    6914          19 :         TAILQ_INIT(&tmp_queued);
    6915             : 
    6916          19 :         channel = __io_ch_to_bdev_ch(ch);
    6917          19 :         shared_resource = channel->shared_resource;
    6918          19 :         mgmt_channel = shared_resource->mgmt_ch;
    6919             : 
    6920          19 :         channel->flags |= BDEV_CH_RESET_IN_PROGRESS;
    6921             : 
    6922          19 :         if ((channel->flags & BDEV_CH_QOS_ENABLED) != 0) {
    6923           2 :                 TAILQ_SWAP(&channel->qos_queued_io, &tmp_queued, spdk_bdev_io, internal.link);
    6924           2 :         }
    6925             : 
    6926          19 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, channel);
    6927          19 :         bdev_abort_all_buf_io(mgmt_channel, channel);
    6928          19 :         bdev_abort_all_queued_io(&tmp_queued, channel);
    6929             : 
    6930          19 :         spdk_bdev_for_each_channel_continue(i, 0);
    6931          19 : }
    6932             : 
    6933             : static void
    6934          18 : bdev_start_reset(struct spdk_bdev_io *bdev_io)
    6935             : {
    6936          18 :         struct spdk_bdev *bdev = bdev_io->bdev;
    6937          18 :         bool freeze_channel = false;
    6938             : 
    6939          18 :         bdev_ch_add_to_io_submitted(bdev_io);
    6940             : 
    6941             :         /**
    6942             :          * Take a channel reference for the target bdev for the life of this
    6943             :          *  reset.  This guards against the channel getting destroyed before
    6944             :          *  the reset is completed.  We will release the reference when this
    6945             :          *  reset is completed.
    6946             :          */
    6947          18 :         bdev_io->u.reset.ch_ref = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    6948             : 
    6949          18 :         spdk_spin_lock(&bdev->internal.spinlock);
    6950          18 :         if (bdev->internal.reset_in_progress == NULL) {
    6951          16 :                 bdev->internal.reset_in_progress = bdev_io;
    6952          16 :                 freeze_channel = true;
    6953          16 :         } else {
    6954           2 :                 TAILQ_INSERT_TAIL(&bdev->internal.queued_resets, bdev_io, internal.link);
    6955             :         }
    6956          18 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6957             : 
    6958          18 :         if (freeze_channel) {
    6959          16 :                 spdk_bdev_for_each_channel(bdev, bdev_reset_freeze_channel, bdev_io,
    6960             :                                            bdev_reset_freeze_channel_done);
    6961          16 :         }
    6962          18 : }
    6963             : 
    6964             : int
    6965          18 : spdk_bdev_reset(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6966             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6967             : {
    6968          18 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6969             :         struct spdk_bdev_io *bdev_io;
    6970          18 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6971             : 
    6972          18 :         bdev_io = bdev_channel_get_io(channel);
    6973          18 :         if (!bdev_io) {
    6974           0 :                 return -ENOMEM;
    6975             :         }
    6976             : 
    6977          18 :         bdev_io->internal.ch = channel;
    6978          18 :         bdev_io->internal.desc = desc;
    6979          18 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    6980          18 :         bdev_io->type = SPDK_BDEV_IO_TYPE_RESET;
    6981          18 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6982             : 
    6983          18 :         bdev_start_reset(bdev_io);
    6984          18 :         return 0;
    6985          18 : }
    6986             : 
    6987             : void
    6988           0 : spdk_bdev_get_io_stat(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    6989             :                       struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode reset_mode)
    6990             : {
    6991           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6992             : 
    6993           0 :         bdev_get_io_stat(stat, channel->stat);
    6994           0 :         spdk_bdev_reset_io_stat(channel->stat, reset_mode);
    6995           0 : }
    6996             : 
    6997             : static void
    6998           5 : bdev_get_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6999             : {
    7000           5 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    7001             : 
    7002          10 :         bdev_iostat_ctx->cb(bdev, bdev_iostat_ctx->stat,
    7003           5 :                             bdev_iostat_ctx->cb_arg, 0);
    7004           5 :         free(bdev_iostat_ctx);
    7005           5 : }
    7006             : 
    7007             : static void
    7008           4 : bdev_get_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    7009             :                            struct spdk_io_channel *ch, void *_ctx)
    7010             : {
    7011           4 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    7012           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7013             : 
    7014           4 :         spdk_bdev_add_io_stat(bdev_iostat_ctx->stat, channel->stat);
    7015           4 :         spdk_bdev_reset_io_stat(channel->stat, bdev_iostat_ctx->reset_mode);
    7016           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    7017           4 : }
    7018             : 
    7019             : void
    7020           5 : spdk_bdev_get_device_stat(struct spdk_bdev *bdev, struct spdk_bdev_io_stat *stat,
    7021             :                           enum spdk_bdev_reset_stat_mode reset_mode, spdk_bdev_get_device_stat_cb cb, void *cb_arg)
    7022             : {
    7023             :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx;
    7024             : 
    7025           5 :         assert(bdev != NULL);
    7026           5 :         assert(stat != NULL);
    7027           5 :         assert(cb != NULL);
    7028             : 
    7029           5 :         bdev_iostat_ctx = calloc(1, sizeof(struct spdk_bdev_iostat_ctx));
    7030           5 :         if (bdev_iostat_ctx == NULL) {
    7031           0 :                 SPDK_ERRLOG("Unable to allocate memory for spdk_bdev_iostat_ctx\n");
    7032           0 :                 cb(bdev, stat, cb_arg, -ENOMEM);
    7033           0 :                 return;
    7034             :         }
    7035             : 
    7036           5 :         bdev_iostat_ctx->stat = stat;
    7037           5 :         bdev_iostat_ctx->cb = cb;
    7038           5 :         bdev_iostat_ctx->cb_arg = cb_arg;
    7039           5 :         bdev_iostat_ctx->reset_mode = reset_mode;
    7040             : 
    7041             :         /* Start with the statistics from previously deleted channels. */
    7042           5 :         spdk_spin_lock(&bdev->internal.spinlock);
    7043           5 :         bdev_get_io_stat(bdev_iostat_ctx->stat, bdev->internal.stat);
    7044           5 :         spdk_bdev_reset_io_stat(bdev->internal.stat, reset_mode);
    7045           5 :         spdk_spin_unlock(&bdev->internal.spinlock);
    7046             : 
    7047             :         /* Then iterate and add the statistics from each existing channel. */
    7048           5 :         spdk_bdev_for_each_channel(bdev, bdev_get_each_channel_stat, bdev_iostat_ctx,
    7049             :                                    bdev_get_device_stat_done);
    7050           5 : }
    7051             : 
    7052             : struct bdev_iostat_reset_ctx {
    7053             :         enum spdk_bdev_reset_stat_mode mode;
    7054             :         bdev_reset_device_stat_cb cb;
    7055             :         void *cb_arg;
    7056             : };
    7057             : 
    7058             : static void
    7059           0 : bdev_reset_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    7060             : {
    7061           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    7062             : 
    7063           0 :         ctx->cb(bdev, ctx->cb_arg, 0);
    7064             : 
    7065           0 :         free(ctx);
    7066           0 : }
    7067             : 
    7068             : static void
    7069           0 : bdev_reset_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    7070             :                              struct spdk_io_channel *ch, void *_ctx)
    7071             : {
    7072           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    7073           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7074             : 
    7075           0 :         spdk_bdev_reset_io_stat(channel->stat, ctx->mode);
    7076             : 
    7077           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    7078           0 : }
    7079             : 
    7080             : void
    7081           0 : bdev_reset_device_stat(struct spdk_bdev *bdev, enum spdk_bdev_reset_stat_mode mode,
    7082             :                        bdev_reset_device_stat_cb cb, void *cb_arg)
    7083             : {
    7084             :         struct bdev_iostat_reset_ctx *ctx;
    7085             : 
    7086           0 :         assert(bdev != NULL);
    7087           0 :         assert(cb != NULL);
    7088             : 
    7089           0 :         ctx = calloc(1, sizeof(*ctx));
    7090           0 :         if (ctx == NULL) {
    7091           0 :                 SPDK_ERRLOG("Unable to allocate bdev_iostat_reset_ctx.\n");
    7092           0 :                 cb(bdev, cb_arg, -ENOMEM);
    7093           0 :                 return;
    7094             :         }
    7095             : 
    7096           0 :         ctx->mode = mode;
    7097           0 :         ctx->cb = cb;
    7098           0 :         ctx->cb_arg = cb_arg;
    7099             : 
    7100           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    7101           0 :         spdk_bdev_reset_io_stat(bdev->internal.stat, mode);
    7102           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    7103             : 
    7104           0 :         spdk_bdev_for_each_channel(bdev,
    7105             :                                    bdev_reset_each_channel_stat,
    7106           0 :                                    ctx,
    7107             :                                    bdev_reset_device_stat_done);
    7108           0 : }
    7109             : 
    7110             : int
    7111           1 : spdk_bdev_nvme_admin_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7112             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    7113             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7114             : {
    7115           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7116             :         struct spdk_bdev_io *bdev_io;
    7117           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7118             : 
    7119           1 :         if (!desc->write) {
    7120           0 :                 return -EBADF;
    7121             :         }
    7122             : 
    7123           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_ADMIN))) {
    7124           1 :                 return -ENOTSUP;
    7125             :         }
    7126             : 
    7127           0 :         bdev_io = bdev_channel_get_io(channel);
    7128           0 :         if (!bdev_io) {
    7129           0 :                 return -ENOMEM;
    7130             :         }
    7131             : 
    7132           0 :         bdev_io->internal.ch = channel;
    7133           0 :         bdev_io->internal.desc = desc;
    7134           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_ADMIN;
    7135           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7136           0 :         bdev_io->u.nvme_passthru.buf = buf;
    7137           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7138           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    7139           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    7140             : 
    7141           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7142             : 
    7143           0 :         bdev_io_submit(bdev_io);
    7144           0 :         return 0;
    7145           1 : }
    7146             : 
    7147             : int
    7148           1 : spdk_bdev_nvme_io_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7149             :                            const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    7150             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    7151             : {
    7152           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7153             :         struct spdk_bdev_io *bdev_io;
    7154           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7155             : 
    7156           1 :         if (!desc->write) {
    7157             :                 /*
    7158             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7159             :                  *  to easily determine if the command is a read or write, but for now just
    7160             :                  *  do not allow io_passthru with a read-only descriptor.
    7161             :                  */
    7162           0 :                 return -EBADF;
    7163             :         }
    7164             : 
    7165           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    7166           1 :                 return -ENOTSUP;
    7167             :         }
    7168             : 
    7169           0 :         bdev_io = bdev_channel_get_io(channel);
    7170           0 :         if (!bdev_io) {
    7171           0 :                 return -ENOMEM;
    7172             :         }
    7173             : 
    7174           0 :         bdev_io->internal.ch = channel;
    7175           0 :         bdev_io->internal.desc = desc;
    7176           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO;
    7177           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7178           0 :         bdev_io->u.nvme_passthru.buf = buf;
    7179           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7180           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    7181           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    7182             : 
    7183           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7184             : 
    7185           0 :         bdev_io_submit(bdev_io);
    7186           0 :         return 0;
    7187           1 : }
    7188             : 
    7189             : int
    7190           1 : spdk_bdev_nvme_io_passthru_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7191             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes, void *md_buf, size_t md_len,
    7192             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7193             : {
    7194           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7195             :         struct spdk_bdev_io *bdev_io;
    7196           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7197             : 
    7198           1 :         if (!desc->write) {
    7199             :                 /*
    7200             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7201             :                  *  to easily determine if the command is a read or write, but for now just
    7202             :                  *  do not allow io_passthru with a read-only descriptor.
    7203             :                  */
    7204           0 :                 return -EBADF;
    7205             :         }
    7206             : 
    7207           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    7208           1 :                 return -ENOTSUP;
    7209             :         }
    7210             : 
    7211           0 :         bdev_io = bdev_channel_get_io(channel);
    7212           0 :         if (!bdev_io) {
    7213           0 :                 return -ENOMEM;
    7214             :         }
    7215             : 
    7216           0 :         bdev_io->internal.ch = channel;
    7217           0 :         bdev_io->internal.desc = desc;
    7218           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO_MD;
    7219           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7220           0 :         bdev_io->u.nvme_passthru.buf = buf;
    7221           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7222           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    7223           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    7224             : 
    7225           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7226             : 
    7227           0 :         bdev_io_submit(bdev_io);
    7228           0 :         return 0;
    7229           1 : }
    7230             : 
    7231             : int
    7232           0 : spdk_bdev_nvme_iov_passthru_md(struct spdk_bdev_desc *desc,
    7233             :                                struct spdk_io_channel *ch,
    7234             :                                const struct spdk_nvme_cmd *cmd,
    7235             :                                struct iovec *iov, int iovcnt, size_t nbytes,
    7236             :                                void *md_buf, size_t md_len,
    7237             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    7238             : {
    7239           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7240             :         struct spdk_bdev_io *bdev_io;
    7241           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7242             : 
    7243           0 :         if (!desc->write) {
    7244             :                 /*
    7245             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7246             :                  * to easily determine if the command is a read or write, but for now just
    7247             :                  * do not allow io_passthru with a read-only descriptor.
    7248             :                  */
    7249           0 :                 return -EBADF;
    7250             :         }
    7251             : 
    7252           0 :         if (md_buf && spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    7253           0 :                 return -ENOTSUP;
    7254           0 :         } else if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    7255           0 :                 return -ENOTSUP;
    7256             :         }
    7257             : 
    7258           0 :         bdev_io = bdev_channel_get_io(channel);
    7259           0 :         if (!bdev_io) {
    7260           0 :                 return -ENOMEM;
    7261             :         }
    7262             : 
    7263           0 :         bdev_io->internal.ch = channel;
    7264           0 :         bdev_io->internal.desc = desc;
    7265           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IOV_MD;
    7266           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7267           0 :         bdev_io->u.nvme_passthru.iovs = iov;
    7268           0 :         bdev_io->u.nvme_passthru.iovcnt = iovcnt;
    7269           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7270           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    7271           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    7272             : 
    7273           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7274             : 
    7275           0 :         bdev_io_submit(bdev_io);
    7276           0 :         return 0;
    7277           0 : }
    7278             : 
    7279             : static void bdev_abort_retry(void *ctx);
    7280             : static void bdev_abort(struct spdk_bdev_io *parent_io);
    7281             : 
    7282             : static void
    7283          22 : bdev_abort_io_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    7284             : {
    7285          22 :         struct spdk_bdev_channel *channel = bdev_io->internal.ch;
    7286          22 :         struct spdk_bdev_io *parent_io = cb_arg;
    7287             :         struct spdk_bdev_io *bio_to_abort, *tmp_io;
    7288             : 
    7289          22 :         bio_to_abort = bdev_io->u.abort.bio_to_abort;
    7290             : 
    7291          22 :         spdk_bdev_free_io(bdev_io);
    7292             : 
    7293          22 :         if (!success) {
    7294             :                 /* Check if the target I/O completed in the meantime. */
    7295           2 :                 TAILQ_FOREACH(tmp_io, &channel->io_submitted, internal.ch_link) {
    7296           1 :                         if (tmp_io == bio_to_abort) {
    7297           0 :                                 break;
    7298             :                         }
    7299           1 :                 }
    7300             : 
    7301             :                 /* If the target I/O still exists, set the parent to failed. */
    7302           1 :                 if (tmp_io != NULL) {
    7303           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7304           0 :                 }
    7305           1 :         }
    7306             : 
    7307          22 :         assert(parent_io->internal.f.split);
    7308             : 
    7309          22 :         parent_io->internal.split.outstanding--;
    7310          22 :         if (parent_io->internal.split.outstanding == 0) {
    7311          16 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7312           0 :                         bdev_abort_retry(parent_io);
    7313           0 :                 } else {
    7314          16 :                         bdev_io_complete(parent_io);
    7315             :                 }
    7316          16 :         }
    7317          22 : }
    7318             : 
    7319             : static int
    7320          23 : bdev_abort_io(struct spdk_bdev_desc *desc, struct spdk_bdev_channel *channel,
    7321             :               struct spdk_bdev_io *bio_to_abort,
    7322             :               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7323             : {
    7324          23 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7325             :         struct spdk_bdev_io *bdev_io;
    7326             : 
    7327          23 :         if (bio_to_abort->type == SPDK_BDEV_IO_TYPE_ABORT ||
    7328          23 :             bio_to_abort->type == SPDK_BDEV_IO_TYPE_RESET) {
    7329             :                 /* TODO: Abort reset or abort request. */
    7330           0 :                 return -ENOTSUP;
    7331             :         }
    7332             : 
    7333          23 :         bdev_io = bdev_channel_get_io(channel);
    7334          23 :         if (bdev_io == NULL) {
    7335           1 :                 return -ENOMEM;
    7336             :         }
    7337             : 
    7338          22 :         bdev_io->internal.ch = channel;
    7339          22 :         bdev_io->internal.desc = desc;
    7340          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7341          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7342             : 
    7343          22 :         if (bio_to_abort->internal.f.split) {
    7344           6 :                 assert(bdev_io_should_split(bio_to_abort));
    7345           6 :                 bdev_io->u.bdev.abort.bio_cb_arg = bio_to_abort;
    7346             : 
    7347             :                 /* Parent abort request is not submitted directly, but to manage its
    7348             :                  * execution add it to the submitted list here.
    7349             :                  */
    7350           6 :                 bdev_io->internal.submit_tsc = spdk_get_ticks();
    7351           6 :                 bdev_ch_add_to_io_submitted(bdev_io);
    7352             : 
    7353           6 :                 bdev_abort(bdev_io);
    7354             : 
    7355           6 :                 return 0;
    7356             :         }
    7357             : 
    7358          16 :         bdev_io->u.abort.bio_to_abort = bio_to_abort;
    7359             : 
    7360             :         /* Submit the abort request to the underlying bdev module. */
    7361          16 :         bdev_io_submit(bdev_io);
    7362             : 
    7363          16 :         return 0;
    7364          23 : }
    7365             : 
    7366             : static bool
    7367          46 : bdev_io_on_tailq(struct spdk_bdev_io *bdev_io, bdev_io_tailq_t *tailq)
    7368             : {
    7369             :         struct spdk_bdev_io *iter;
    7370             : 
    7371          46 :         TAILQ_FOREACH(iter, tailq, internal.link) {
    7372           0 :                 if (iter == bdev_io) {
    7373           0 :                         return true;
    7374             :                 }
    7375           0 :         }
    7376             : 
    7377          46 :         return false;
    7378          46 : }
    7379             : 
    7380             : static uint32_t
    7381          18 : _bdev_abort(struct spdk_bdev_io *parent_io)
    7382             : {
    7383          18 :         struct spdk_bdev_desc *desc = parent_io->internal.desc;
    7384          18 :         struct spdk_bdev_channel *channel = parent_io->internal.ch;
    7385             :         void *bio_cb_arg;
    7386             :         struct spdk_bdev_io *bio_to_abort;
    7387             :         uint32_t matched_ios;
    7388             :         int rc;
    7389             : 
    7390          18 :         bio_cb_arg = parent_io->u.bdev.abort.bio_cb_arg;
    7391             : 
    7392             :         /* matched_ios is returned and will be kept by the caller.
    7393             :          *
    7394             :          * This function will be used for two cases, 1) the same cb_arg is used for
    7395             :          * multiple I/Os, 2) a single large I/O is split into smaller ones.
    7396             :          * Incrementing split_outstanding directly here may confuse readers especially
    7397             :          * for the 1st case.
    7398             :          *
    7399             :          * Completion of I/O abort is processed after stack unwinding. Hence this trick
    7400             :          * works as expected.
    7401             :          */
    7402          18 :         matched_ios = 0;
    7403          18 :         parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7404             : 
    7405         105 :         TAILQ_FOREACH(bio_to_abort, &channel->io_submitted, internal.ch_link) {
    7406          88 :                 if (bio_to_abort->internal.caller_ctx != bio_cb_arg) {
    7407          65 :                         continue;
    7408             :                 }
    7409             : 
    7410          23 :                 if (bio_to_abort->internal.submit_tsc > parent_io->internal.submit_tsc) {
    7411             :                         /* Any I/O which was submitted after this abort command should be excluded. */
    7412           0 :                         continue;
    7413             :                 }
    7414             : 
    7415             :                 /* We can't abort a request that's being pushed/pulled or executed by accel */
    7416          23 :                 if (bdev_io_on_tailq(bio_to_abort, &channel->io_accel_exec) ||
    7417          23 :                     bdev_io_on_tailq(bio_to_abort, &channel->io_memory_domain)) {
    7418           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7419           0 :                         break;
    7420             :                 }
    7421             : 
    7422          23 :                 rc = bdev_abort_io(desc, channel, bio_to_abort, bdev_abort_io_done, parent_io);
    7423          23 :                 if (rc != 0) {
    7424           1 :                         if (rc == -ENOMEM) {
    7425           1 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_NOMEM;
    7426           1 :                         } else {
    7427           0 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7428             :                         }
    7429           1 :                         break;
    7430             :                 }
    7431          22 :                 matched_ios++;
    7432          22 :         }
    7433             : 
    7434          18 :         return matched_ios;
    7435             : }
    7436             : 
    7437             : static void
    7438           1 : bdev_abort_retry(void *ctx)
    7439             : {
    7440           1 :         struct spdk_bdev_io *parent_io = ctx;
    7441             :         uint32_t matched_ios;
    7442             : 
    7443           1 :         matched_ios = _bdev_abort(parent_io);
    7444             : 
    7445           1 :         if (matched_ios == 0) {
    7446           0 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7447           0 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7448           0 :                 } else {
    7449             :                         /* For retry, the case that no target I/O was found is success
    7450             :                          * because it means target I/Os completed in the meantime.
    7451             :                          */
    7452           0 :                         bdev_io_complete(parent_io);
    7453             :                 }
    7454           0 :                 return;
    7455             :         }
    7456             : 
    7457             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7458           1 :         parent_io->internal.f.split = true;
    7459           1 :         parent_io->internal.split.outstanding = matched_ios;
    7460           1 : }
    7461             : 
    7462             : static void
    7463          17 : bdev_abort(struct spdk_bdev_io *parent_io)
    7464             : {
    7465             :         uint32_t matched_ios;
    7466             : 
    7467          17 :         matched_ios = _bdev_abort(parent_io);
    7468             : 
    7469          17 :         if (matched_ios == 0) {
    7470           2 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7471           1 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7472           1 :                 } else {
    7473             :                         /* The case the no target I/O was found is failure. */
    7474           1 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7475           1 :                         bdev_io_complete(parent_io);
    7476             :                 }
    7477           2 :                 return;
    7478             :         }
    7479             : 
    7480             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7481          15 :         parent_io->internal.f.split = true;
    7482          15 :         parent_io->internal.split.outstanding = matched_ios;
    7483          17 : }
    7484             : 
    7485             : int
    7486          12 : spdk_bdev_abort(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7487             :                 void *bio_cb_arg,
    7488             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    7489             : {
    7490          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7491          12 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7492             :         struct spdk_bdev_io *bdev_io;
    7493             : 
    7494          12 :         if (bio_cb_arg == NULL) {
    7495           0 :                 return -EINVAL;
    7496             :         }
    7497             : 
    7498          12 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ABORT)) {
    7499           1 :                 return -ENOTSUP;
    7500             :         }
    7501             : 
    7502          11 :         bdev_io = bdev_channel_get_io(channel);
    7503          11 :         if (bdev_io == NULL) {
    7504           0 :                 return -ENOMEM;
    7505             :         }
    7506             : 
    7507          11 :         bdev_io->internal.ch = channel;
    7508          11 :         bdev_io->internal.desc = desc;
    7509          11 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    7510          11 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7511          11 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7512             : 
    7513          11 :         bdev_io->u.bdev.abort.bio_cb_arg = bio_cb_arg;
    7514             : 
    7515             :         /* Parent abort request is not submitted directly, but to manage its execution,
    7516             :          * add it to the submitted list here.
    7517             :          */
    7518          11 :         bdev_ch_add_to_io_submitted(bdev_io);
    7519             : 
    7520          11 :         bdev_abort(bdev_io);
    7521             : 
    7522          11 :         return 0;
    7523          12 : }
    7524             : 
    7525             : int
    7526           4 : spdk_bdev_queue_io_wait(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    7527             :                         struct spdk_bdev_io_wait_entry *entry)
    7528             : {
    7529           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7530           4 :         struct spdk_bdev_mgmt_channel *mgmt_ch = channel->shared_resource->mgmt_ch;
    7531             : 
    7532           4 :         if (bdev != entry->bdev) {
    7533           0 :                 SPDK_ERRLOG("bdevs do not match\n");
    7534           0 :                 return -EINVAL;
    7535             :         }
    7536             : 
    7537           4 :         if (mgmt_ch->per_thread_cache_count > 0) {
    7538           0 :                 SPDK_ERRLOG("Cannot queue io_wait if spdk_bdev_io available in per-thread cache\n");
    7539           0 :                 return -EINVAL;
    7540             :         }
    7541             : 
    7542           4 :         TAILQ_INSERT_TAIL(&mgmt_ch->io_wait_queue, entry, link);
    7543           4 :         return 0;
    7544           4 : }
    7545             : 
    7546             : static inline void
    7547         612 : bdev_io_update_io_stat(struct spdk_bdev_io *bdev_io, uint64_t tsc_diff)
    7548             : {
    7549         612 :         enum spdk_bdev_io_status io_status = bdev_io->internal.status;
    7550         612 :         struct spdk_bdev_io_stat *io_stat = bdev_io->internal.ch->stat;
    7551         612 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    7552         612 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    7553             : 
    7554         612 :         if (spdk_likely(io_status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7555         519 :                 switch (bdev_io->type) {
    7556             :                 case SPDK_BDEV_IO_TYPE_READ:
    7557         321 :                         io_stat->bytes_read += num_blocks * blocklen;
    7558         321 :                         io_stat->num_read_ops++;
    7559         321 :                         io_stat->read_latency_ticks += tsc_diff;
    7560         321 :                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7561           7 :                                 io_stat->max_read_latency_ticks = tsc_diff;
    7562           7 :                         }
    7563         321 :                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7564          42 :                                 io_stat->min_read_latency_ticks = tsc_diff;
    7565          42 :                         }
    7566         321 :                         break;
    7567             :                 case SPDK_BDEV_IO_TYPE_WRITE:
    7568          75 :                         io_stat->bytes_written += num_blocks * blocklen;
    7569          75 :                         io_stat->num_write_ops++;
    7570          75 :                         io_stat->write_latency_ticks += tsc_diff;
    7571          75 :                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7572           4 :                                 io_stat->max_write_latency_ticks = tsc_diff;
    7573           4 :                         }
    7574          75 :                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7575          25 :                                 io_stat->min_write_latency_ticks = tsc_diff;
    7576          25 :                         }
    7577          75 :                         break;
    7578             :                 case SPDK_BDEV_IO_TYPE_UNMAP:
    7579          20 :                         io_stat->bytes_unmapped += num_blocks * blocklen;
    7580          20 :                         io_stat->num_unmap_ops++;
    7581          20 :                         io_stat->unmap_latency_ticks += tsc_diff;
    7582          20 :                         if (io_stat->max_unmap_latency_ticks < tsc_diff) {
    7583           0 :                                 io_stat->max_unmap_latency_ticks = tsc_diff;
    7584           0 :                         }
    7585          20 :                         if (io_stat->min_unmap_latency_ticks > tsc_diff) {
    7586           3 :                                 io_stat->min_unmap_latency_ticks = tsc_diff;
    7587           3 :                         }
    7588          20 :                         break;
    7589             :                 case SPDK_BDEV_IO_TYPE_ZCOPY:
    7590             :                         /* Track the data in the start phase only */
    7591           4 :                         if (bdev_io->u.bdev.zcopy.start) {
    7592           2 :                                 if (bdev_io->u.bdev.zcopy.populate) {
    7593           1 :                                         io_stat->bytes_read += num_blocks * blocklen;
    7594           1 :                                         io_stat->num_read_ops++;
    7595           1 :                                         io_stat->read_latency_ticks += tsc_diff;
    7596           1 :                                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7597           0 :                                                 io_stat->max_read_latency_ticks = tsc_diff;
    7598           0 :                                         }
    7599           1 :                                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7600           1 :                                                 io_stat->min_read_latency_ticks = tsc_diff;
    7601           1 :                                         }
    7602           1 :                                 } else {
    7603           1 :                                         io_stat->bytes_written += num_blocks * blocklen;
    7604           1 :                                         io_stat->num_write_ops++;
    7605           1 :                                         io_stat->write_latency_ticks += tsc_diff;
    7606           1 :                                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7607           0 :                                                 io_stat->max_write_latency_ticks = tsc_diff;
    7608           0 :                                         }
    7609           1 :                                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7610           1 :                                                 io_stat->min_write_latency_ticks = tsc_diff;
    7611           1 :                                         }
    7612             :                                 }
    7613           2 :                         }
    7614           4 :                         break;
    7615             :                 case SPDK_BDEV_IO_TYPE_COPY:
    7616          21 :                         io_stat->bytes_copied += num_blocks * blocklen;
    7617          21 :                         io_stat->num_copy_ops++;
    7618          21 :                         bdev_io->internal.ch->stat->copy_latency_ticks += tsc_diff;
    7619          21 :                         if (io_stat->max_copy_latency_ticks < tsc_diff) {
    7620           0 :                                 io_stat->max_copy_latency_ticks = tsc_diff;
    7621           0 :                         }
    7622          21 :                         if (io_stat->min_copy_latency_ticks > tsc_diff) {
    7623           4 :                                 io_stat->min_copy_latency_ticks = tsc_diff;
    7624           4 :                         }
    7625          21 :                         break;
    7626             :                 default:
    7627          78 :                         break;
    7628             :                 }
    7629         612 :         } else if (io_status <= SPDK_BDEV_IO_STATUS_FAILED && io_status >= SPDK_MIN_BDEV_IO_STATUS) {
    7630          93 :                 io_stat = bdev_io->bdev->internal.stat;
    7631          93 :                 assert(io_stat->io_error != NULL);
    7632             : 
    7633          93 :                 spdk_spin_lock(&bdev_io->bdev->internal.spinlock);
    7634          93 :                 io_stat->io_error->error_status[-io_status - 1]++;
    7635          93 :                 spdk_spin_unlock(&bdev_io->bdev->internal.spinlock);
    7636          93 :         }
    7637             : 
    7638             : #ifdef SPDK_CONFIG_VTUNE
    7639             :         uint64_t now_tsc = spdk_get_ticks();
    7640             :         if (now_tsc > (bdev_io->internal.ch->start_tsc + bdev_io->internal.ch->interval_tsc)) {
    7641             :                 uint64_t data[5];
    7642             :                 struct spdk_bdev_io_stat *prev_stat = bdev_io->internal.ch->prev_stat;
    7643             : 
    7644             :                 data[0] = io_stat->num_read_ops - prev_stat->num_read_ops;
    7645             :                 data[1] = io_stat->bytes_read - prev_stat->bytes_read;
    7646             :                 data[2] = io_stat->num_write_ops - prev_stat->num_write_ops;
    7647             :                 data[3] = io_stat->bytes_written - prev_stat->bytes_written;
    7648             :                 data[4] = bdev_io->bdev->fn_table->get_spin_time ?
    7649             :                           bdev_io->bdev->fn_table->get_spin_time(spdk_bdev_io_get_io_channel(bdev_io)) : 0;
    7650             : 
    7651             :                 __itt_metadata_add(g_bdev_mgr.domain, __itt_null, bdev_io->internal.ch->handle,
    7652             :                                    __itt_metadata_u64, 5, data);
    7653             : 
    7654             :                 memcpy(prev_stat, io_stat, sizeof(struct spdk_bdev_io_stat));
    7655             :                 bdev_io->internal.ch->start_tsc = now_tsc;
    7656             :         }
    7657             : #endif
    7658         612 : }
    7659             : 
    7660             : static inline void
    7661         612 : _bdev_io_complete(void *ctx)
    7662             : {
    7663         612 :         struct spdk_bdev_io *bdev_io = ctx;
    7664             : 
    7665         612 :         if (spdk_unlikely(bdev_io_use_accel_sequence(bdev_io))) {
    7666           0 :                 assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7667           0 :                 spdk_accel_sequence_abort(bdev_io->internal.accel_sequence);
    7668           0 :         }
    7669             : 
    7670         612 :         assert(bdev_io->internal.cb != NULL);
    7671         612 :         assert(spdk_get_thread() == spdk_bdev_io_get_thread(bdev_io));
    7672             : 
    7673        1224 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    7674         612 :                              bdev_io->internal.caller_ctx);
    7675         612 : }
    7676             : 
    7677             : static inline void
    7678         620 : bdev_io_complete(void *ctx)
    7679             : {
    7680         620 :         struct spdk_bdev_io *bdev_io = ctx;
    7681         620 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7682             :         uint64_t tsc, tsc_diff;
    7683             : 
    7684         620 :         if (spdk_unlikely(bdev_io->internal.f.in_submit_request)) {
    7685             :                 /*
    7686             :                  * Defer completion to avoid potential infinite recursion if the
    7687             :                  * user's completion callback issues a new I/O.
    7688             :                  */
    7689          16 :                 spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7690           8 :                                      bdev_io_complete, bdev_io);
    7691           8 :                 return;
    7692             :         }
    7693             : 
    7694         612 :         tsc = spdk_get_ticks();
    7695         612 :         tsc_diff = tsc - bdev_io->internal.submit_tsc;
    7696             : 
    7697         612 :         bdev_ch_remove_from_io_submitted(bdev_io);
    7698         612 :         spdk_trace_record_tsc(tsc, TRACE_BDEV_IO_DONE, bdev_ch->trace_id, 0, (uintptr_t)bdev_io,
    7699             :                               bdev_io->internal.caller_ctx, bdev_ch->queue_depth);
    7700             : 
    7701         612 :         if (bdev_ch->histogram) {
    7702           4 :                 if (bdev_io->bdev->internal.histogram_io_type == 0 ||
    7703           0 :                     bdev_io->bdev->internal.histogram_io_type == bdev_io->type) {
    7704             :                         /*
    7705             :                          * Tally all I/O types if the histogram_io_type is set to 0.
    7706             :                          */
    7707           4 :                         spdk_histogram_data_tally(bdev_ch->histogram, tsc_diff);
    7708           4 :                 }
    7709           4 :         }
    7710             : 
    7711         612 :         bdev_io_update_io_stat(bdev_io, tsc_diff);
    7712         612 :         _bdev_io_complete(bdev_io);
    7713         620 : }
    7714             : 
    7715             : /* The difference between this function and bdev_io_complete() is that this should be called to
    7716             :  * complete IOs that haven't been submitted via bdev_io_submit(), as they weren't added onto the
    7717             :  * io_submitted list and don't have submit_tsc updated.
    7718             :  */
    7719             : static inline void
    7720           0 : bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io)
    7721             : {
    7722             :         /* Since the IO hasn't been submitted it's bound to be failed */
    7723           0 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7724             : 
    7725             :         /* At this point we don't know if the IO is completed from submission context or not, but,
    7726             :          * since this is an error path, we can always do an spdk_thread_send_msg(). */
    7727           0 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7728           0 :                              _bdev_io_complete, bdev_io);
    7729           0 : }
    7730             : 
    7731             : static void bdev_destroy_cb(void *io_device);
    7732             : 
    7733             : static inline void
    7734          18 : _bdev_reset_complete(void *ctx)
    7735             : {
    7736          18 :         struct spdk_bdev_io *bdev_io = ctx;
    7737             : 
    7738             :         /* Put the channel reference we got in submission. */
    7739          18 :         assert(bdev_io->u.reset.ch_ref != NULL);
    7740          18 :         spdk_put_io_channel(bdev_io->u.reset.ch_ref);
    7741          18 :         bdev_io->u.reset.ch_ref = NULL;
    7742             : 
    7743          18 :         bdev_io_complete(bdev_io);
    7744          18 : }
    7745             : 
    7746             : static void
    7747          16 : bdev_reset_complete(struct spdk_bdev *bdev, void *_ctx, int status)
    7748             : {
    7749          16 :         struct spdk_bdev_io *bdev_io = _ctx;
    7750             :         bdev_io_tailq_t queued_resets;
    7751             :         struct spdk_bdev_io *queued_reset;
    7752             : 
    7753          16 :         assert(bdev_io == bdev->internal.reset_in_progress);
    7754             : 
    7755          16 :         TAILQ_INIT(&queued_resets);
    7756             : 
    7757          16 :         spdk_spin_lock(&bdev->internal.spinlock);
    7758          16 :         TAILQ_SWAP(&bdev->internal.queued_resets, &queued_resets,
    7759             :                    spdk_bdev_io, internal.link);
    7760          16 :         bdev->internal.reset_in_progress = NULL;
    7761          16 :         spdk_spin_unlock(&bdev->internal.spinlock);
    7762             : 
    7763          18 :         while (!TAILQ_EMPTY(&queued_resets)) {
    7764           2 :                 queued_reset = TAILQ_FIRST(&queued_resets);
    7765           2 :                 TAILQ_REMOVE(&queued_resets, queued_reset, internal.link);
    7766           2 :                 queued_reset->internal.status = bdev_io->internal.status;
    7767           4 :                 spdk_thread_send_msg(spdk_bdev_io_get_thread(queued_reset),
    7768           2 :                                      _bdev_reset_complete, queued_reset);
    7769             :         }
    7770             : 
    7771          16 :         _bdev_reset_complete(bdev_io);
    7772             : 
    7773          16 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING &&
    7774           1 :             TAILQ_EMPTY(&bdev->internal.open_descs)) {
    7775           1 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    7776           1 :         }
    7777          16 : }
    7778             : 
    7779             : static void
    7780          20 : bdev_unfreeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    7781             :                       struct spdk_io_channel *_ch, void *_ctx)
    7782             : {
    7783          20 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    7784             : 
    7785          20 :         ch->flags &= ~BDEV_CH_RESET_IN_PROGRESS;
    7786             : 
    7787          20 :         spdk_bdev_for_each_channel_continue(i, 0);
    7788          20 : }
    7789             : 
    7790             : static void
    7791           0 : bdev_io_complete_sequence_cb(void *ctx, int status)
    7792             : {
    7793           0 :         struct spdk_bdev_io *bdev_io = ctx;
    7794             : 
    7795             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    7796           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    7797           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    7798           0 :         bdev_io->internal.f.has_accel_sequence = false;
    7799             : 
    7800           0 :         if (spdk_unlikely(status != 0)) {
    7801           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    7802           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7803           0 :         }
    7804             : 
    7805           0 :         bdev_io_complete(bdev_io);
    7806           0 : }
    7807             : 
    7808             : void
    7809         598 : spdk_bdev_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status)
    7810             : {
    7811         598 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7812         598 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7813         598 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    7814             : 
    7815         598 :         if (spdk_unlikely(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING)) {
    7816           0 :                 SPDK_ERRLOG("Unexpected completion on IO from %s module, status was %s\n",
    7817             :                             spdk_bdev_get_module_name(bdev),
    7818             :                             bdev_io_status_get_string(bdev_io->internal.status));
    7819           0 :                 assert(false);
    7820             :         }
    7821         598 :         bdev_io->internal.status = status;
    7822             : 
    7823         598 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_RESET)) {
    7824          16 :                 assert(bdev_io == bdev->internal.reset_in_progress);
    7825          16 :                 spdk_bdev_for_each_channel(bdev, bdev_unfreeze_channel, bdev_io,
    7826             :                                            bdev_reset_complete);
    7827          16 :                 return;
    7828             :         } else {
    7829         582 :                 bdev_io_decrement_outstanding(bdev_ch, shared_resource);
    7830         582 :                 if (spdk_likely(status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7831         485 :                         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    7832           0 :                                 bdev_io_exec_sequence(bdev_io, bdev_io_complete_sequence_cb);
    7833           0 :                                 return;
    7834         485 :                         } else if (spdk_unlikely(bdev_io->internal.f.has_bounce_buf &&
    7835             :                                                  !bdev_io_use_accel_sequence(bdev_io))) {
    7836          26 :                                 _bdev_io_push_bounce_data_buffer(bdev_io,
    7837             :                                                                  _bdev_io_complete_push_bounce_done);
    7838             :                                 /* bdev IO will be completed in the callback */
    7839          26 :                                 return;
    7840             :                         }
    7841         459 :                 }
    7842             : 
    7843         556 :                 if (spdk_unlikely(_bdev_io_handle_no_mem(bdev_io, BDEV_IO_RETRY_STATE_SUBMIT))) {
    7844           5 :                         return;
    7845             :                 }
    7846             :         }
    7847             : 
    7848         551 :         bdev_io_complete(bdev_io);
    7849         598 : }
    7850             : 
    7851             : void
    7852           0 : spdk_bdev_io_complete_scsi_status(struct spdk_bdev_io *bdev_io, enum spdk_scsi_status sc,
    7853             :                                   enum spdk_scsi_sense sk, uint8_t asc, uint8_t ascq)
    7854             : {
    7855             :         enum spdk_bdev_io_status status;
    7856             : 
    7857           0 :         if (sc == SPDK_SCSI_STATUS_GOOD) {
    7858           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7859           0 :         } else {
    7860           0 :                 status = SPDK_BDEV_IO_STATUS_SCSI_ERROR;
    7861           0 :                 bdev_io->internal.error.scsi.sc = sc;
    7862           0 :                 bdev_io->internal.error.scsi.sk = sk;
    7863           0 :                 bdev_io->internal.error.scsi.asc = asc;
    7864           0 :                 bdev_io->internal.error.scsi.ascq = ascq;
    7865             :         }
    7866             : 
    7867           0 :         spdk_bdev_io_complete(bdev_io, status);
    7868           0 : }
    7869             : 
    7870             : void
    7871           0 : spdk_bdev_io_get_scsi_status(const struct spdk_bdev_io *bdev_io,
    7872             :                              int *sc, int *sk, int *asc, int *ascq)
    7873             : {
    7874           0 :         assert(sc != NULL);
    7875           0 :         assert(sk != NULL);
    7876           0 :         assert(asc != NULL);
    7877           0 :         assert(ascq != NULL);
    7878             : 
    7879           0 :         switch (bdev_io->internal.status) {
    7880             :         case SPDK_BDEV_IO_STATUS_SUCCESS:
    7881           0 :                 *sc = SPDK_SCSI_STATUS_GOOD;
    7882           0 :                 *sk = SPDK_SCSI_SENSE_NO_SENSE;
    7883           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7884           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7885           0 :                 break;
    7886             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    7887           0 :                 spdk_scsi_nvme_translate(bdev_io, sc, sk, asc, ascq);
    7888           0 :                 break;
    7889             :         case SPDK_BDEV_IO_STATUS_MISCOMPARE:
    7890           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7891           0 :                 *sk = SPDK_SCSI_SENSE_MISCOMPARE;
    7892           0 :                 *asc = SPDK_SCSI_ASC_MISCOMPARE_DURING_VERIFY_OPERATION;
    7893           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7894           0 :                 break;
    7895             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    7896           0 :                 *sc = bdev_io->internal.error.scsi.sc;
    7897           0 :                 *sk = bdev_io->internal.error.scsi.sk;
    7898           0 :                 *asc = bdev_io->internal.error.scsi.asc;
    7899           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7900           0 :                 break;
    7901             :         default:
    7902           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7903           0 :                 *sk = SPDK_SCSI_SENSE_ABORTED_COMMAND;
    7904           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7905           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7906           0 :                 break;
    7907             :         }
    7908           0 : }
    7909             : 
    7910             : void
    7911           0 : spdk_bdev_io_complete_aio_status(struct spdk_bdev_io *bdev_io, int aio_result)
    7912             : {
    7913             :         enum spdk_bdev_io_status status;
    7914             : 
    7915           0 :         if (aio_result == 0) {
    7916           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7917           0 :         } else {
    7918           0 :                 status = SPDK_BDEV_IO_STATUS_AIO_ERROR;
    7919             :         }
    7920             : 
    7921           0 :         bdev_io->internal.error.aio_result = aio_result;
    7922             : 
    7923           0 :         spdk_bdev_io_complete(bdev_io, status);
    7924           0 : }
    7925             : 
    7926             : void
    7927           0 : spdk_bdev_io_get_aio_status(const struct spdk_bdev_io *bdev_io, int *aio_result)
    7928             : {
    7929           0 :         assert(aio_result != NULL);
    7930             : 
    7931           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_AIO_ERROR) {
    7932           0 :                 *aio_result = bdev_io->internal.error.aio_result;
    7933           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7934           0 :                 *aio_result = 0;
    7935           0 :         } else {
    7936           0 :                 *aio_result = -EIO;
    7937             :         }
    7938           0 : }
    7939             : 
    7940             : void
    7941           0 : spdk_bdev_io_complete_nvme_status(struct spdk_bdev_io *bdev_io, uint32_t cdw0, int sct, int sc)
    7942             : {
    7943             :         enum spdk_bdev_io_status status;
    7944             : 
    7945           0 :         if (spdk_likely(sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_SUCCESS)) {
    7946           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7947           0 :         } else if (sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_ABORTED_BY_REQUEST) {
    7948           0 :                 status = SPDK_BDEV_IO_STATUS_ABORTED;
    7949           0 :         } else {
    7950           0 :                 status = SPDK_BDEV_IO_STATUS_NVME_ERROR;
    7951             :         }
    7952             : 
    7953           0 :         bdev_io->internal.error.nvme.cdw0 = cdw0;
    7954           0 :         bdev_io->internal.error.nvme.sct = sct;
    7955           0 :         bdev_io->internal.error.nvme.sc = sc;
    7956             : 
    7957           0 :         spdk_bdev_io_complete(bdev_io, status);
    7958           0 : }
    7959             : 
    7960             : void
    7961           0 : spdk_bdev_io_get_nvme_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0, int *sct, int *sc)
    7962             : {
    7963           0 :         assert(sct != NULL);
    7964           0 :         assert(sc != NULL);
    7965           0 :         assert(cdw0 != NULL);
    7966             : 
    7967           0 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    7968           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7969           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7970           0 :                 if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7971           0 :                         *cdw0 = 0;
    7972           0 :                 } else {
    7973           0 :                         *cdw0 = 1U;
    7974             :                 }
    7975           0 :                 return;
    7976             :         }
    7977             : 
    7978           0 :         if (spdk_likely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7979           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7980           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7981           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    7982           0 :                 *sct = bdev_io->internal.error.nvme.sct;
    7983           0 :                 *sc = bdev_io->internal.error.nvme.sc;
    7984           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    7985           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7986           0 :                 *sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7987           0 :         } else {
    7988           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7989           0 :                 *sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7990             :         }
    7991             : 
    7992           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    7993           0 : }
    7994             : 
    7995             : void
    7996           0 : spdk_bdev_io_get_nvme_fused_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0,
    7997             :                                    int *first_sct, int *first_sc, int *second_sct, int *second_sc)
    7998             : {
    7999           0 :         assert(first_sct != NULL);
    8000           0 :         assert(first_sc != NULL);
    8001           0 :         assert(second_sct != NULL);
    8002           0 :         assert(second_sc != NULL);
    8003           0 :         assert(cdw0 != NULL);
    8004             : 
    8005           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    8006           0 :                 if (bdev_io->internal.error.nvme.sct == SPDK_NVME_SCT_MEDIA_ERROR &&
    8007           0 :                     bdev_io->internal.error.nvme.sc == SPDK_NVME_SC_COMPARE_FAILURE) {
    8008           0 :                         *first_sct = bdev_io->internal.error.nvme.sct;
    8009           0 :                         *first_sc = bdev_io->internal.error.nvme.sc;
    8010           0 :                         *second_sct = SPDK_NVME_SCT_GENERIC;
    8011           0 :                         *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    8012           0 :                 } else {
    8013           0 :                         *first_sct = SPDK_NVME_SCT_GENERIC;
    8014           0 :                         *first_sc = SPDK_NVME_SC_SUCCESS;
    8015           0 :                         *second_sct = bdev_io->internal.error.nvme.sct;
    8016           0 :                         *second_sc = bdev_io->internal.error.nvme.sc;
    8017             :                 }
    8018           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    8019           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    8020           0 :                 *first_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    8021           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    8022           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    8023           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    8024           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    8025           0 :                 *first_sc = SPDK_NVME_SC_SUCCESS;
    8026           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    8027           0 :                 *second_sc = SPDK_NVME_SC_SUCCESS;
    8028           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED) {
    8029           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    8030           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    8031           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    8032           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    8033           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_MISCOMPARE) {
    8034           0 :                 *first_sct = SPDK_NVME_SCT_MEDIA_ERROR;
    8035           0 :                 *first_sc = SPDK_NVME_SC_COMPARE_FAILURE;
    8036           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    8037           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    8038           0 :         } else {
    8039           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    8040           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    8041           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    8042           0 :                 *second_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    8043             :         }
    8044             : 
    8045           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    8046           0 : }
    8047             : 
    8048             : void
    8049           0 : spdk_bdev_io_complete_base_io_status(struct spdk_bdev_io *bdev_io,
    8050             :                                      const struct spdk_bdev_io *base_io)
    8051             : {
    8052           0 :         switch (base_io->internal.status) {
    8053             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    8054           0 :                 spdk_bdev_io_complete_nvme_status(bdev_io,
    8055           0 :                                                   base_io->internal.error.nvme.cdw0,
    8056           0 :                                                   base_io->internal.error.nvme.sct,
    8057           0 :                                                   base_io->internal.error.nvme.sc);
    8058           0 :                 break;
    8059             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    8060           0 :                 spdk_bdev_io_complete_scsi_status(bdev_io,
    8061           0 :                                                   base_io->internal.error.scsi.sc,
    8062           0 :                                                   base_io->internal.error.scsi.sk,
    8063           0 :                                                   base_io->internal.error.scsi.asc,
    8064           0 :                                                   base_io->internal.error.scsi.ascq);
    8065           0 :                 break;
    8066             :         case SPDK_BDEV_IO_STATUS_AIO_ERROR:
    8067           0 :                 spdk_bdev_io_complete_aio_status(bdev_io, base_io->internal.error.aio_result);
    8068           0 :                 break;
    8069             :         default:
    8070           0 :                 spdk_bdev_io_complete(bdev_io, base_io->internal.status);
    8071           0 :                 break;
    8072             :         }
    8073           0 : }
    8074             : 
    8075             : struct spdk_thread *
    8076         664 : spdk_bdev_io_get_thread(struct spdk_bdev_io *bdev_io)
    8077             : {
    8078         664 :         return spdk_io_channel_get_thread(bdev_io->internal.ch->channel);
    8079             : }
    8080             : 
    8081             : struct spdk_io_channel *
    8082          70 : spdk_bdev_io_get_io_channel(struct spdk_bdev_io *bdev_io)
    8083             : {
    8084          70 :         return bdev_io->internal.ch->channel;
    8085             : }
    8086             : 
    8087             : static int
    8088         132 : bdev_register(struct spdk_bdev *bdev)
    8089             : {
    8090             :         char *bdev_name;
    8091             :         char uuid[SPDK_UUID_STRING_LEN];
    8092             :         struct spdk_iobuf_opts iobuf_opts;
    8093             :         int ret;
    8094             : 
    8095         132 :         assert(bdev->module != NULL);
    8096             : 
    8097         132 :         if (!bdev->name) {
    8098           0 :                 SPDK_ERRLOG("Bdev name is NULL\n");
    8099           0 :                 return -EINVAL;
    8100             :         }
    8101             : 
    8102         132 :         if (!strlen(bdev->name)) {
    8103           0 :                 SPDK_ERRLOG("Bdev name must not be an empty string\n");
    8104           0 :                 return -EINVAL;
    8105             :         }
    8106             : 
    8107             :         /* Users often register their own I/O devices using the bdev name. In
    8108             :          * order to avoid conflicts, prepend bdev_. */
    8109         132 :         bdev_name = spdk_sprintf_alloc("bdev_%s", bdev->name);
    8110         132 :         if (!bdev_name) {
    8111           0 :                 SPDK_ERRLOG("Unable to allocate memory for internal bdev name.\n");
    8112           0 :                 return -ENOMEM;
    8113             :         }
    8114             : 
    8115         132 :         bdev->internal.stat = bdev_alloc_io_stat(true);
    8116         132 :         if (!bdev->internal.stat) {
    8117           0 :                 SPDK_ERRLOG("Unable to allocate I/O statistics structure.\n");
    8118           0 :                 free(bdev_name);
    8119           0 :                 return -ENOMEM;
    8120             :         }
    8121             : 
    8122         132 :         bdev->internal.status = SPDK_BDEV_STATUS_READY;
    8123         132 :         bdev->internal.measured_queue_depth = UINT64_MAX;
    8124         132 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    8125         132 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    8126         132 :         bdev->internal.qd_poller = NULL;
    8127         132 :         bdev->internal.qos = NULL;
    8128             : 
    8129         132 :         TAILQ_INIT(&bdev->internal.open_descs);
    8130         132 :         TAILQ_INIT(&bdev->internal.locked_ranges);
    8131         132 :         TAILQ_INIT(&bdev->internal.pending_locked_ranges);
    8132         132 :         TAILQ_INIT(&bdev->internal.queued_resets);
    8133         132 :         TAILQ_INIT(&bdev->aliases);
    8134             : 
    8135             :         /* UUID may be specified by the user or defined by bdev itself.
    8136             :          * Otherwise it will be generated here, so this field will never be empty. */
    8137         132 :         if (spdk_uuid_is_null(&bdev->uuid)) {
    8138          43 :                 spdk_uuid_generate(&bdev->uuid);
    8139          43 :         }
    8140             : 
    8141             :         /* Add the UUID alias only if it's different than the name */
    8142         132 :         spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    8143         132 :         if (strcmp(bdev->name, uuid) != 0) {
    8144         131 :                 ret = spdk_bdev_alias_add(bdev, uuid);
    8145         131 :                 if (ret != 0) {
    8146           2 :                         SPDK_ERRLOG("Unable to add uuid:%s alias for bdev %s\n", uuid, bdev->name);
    8147           2 :                         bdev_free_io_stat(bdev->internal.stat);
    8148           2 :                         free(bdev_name);
    8149           2 :                         return ret;
    8150             :                 }
    8151         129 :         }
    8152             : 
    8153         130 :         spdk_iobuf_get_opts(&iobuf_opts, sizeof(iobuf_opts));
    8154         130 :         if (spdk_bdev_get_buf_align(bdev) > 1) {
    8155           0 :                 bdev->max_rw_size = spdk_min(bdev->max_rw_size ? bdev->max_rw_size : UINT32_MAX,
    8156             :                                              iobuf_opts.large_bufsize / bdev->blocklen);
    8157           0 :         }
    8158             : 
    8159             :         /* If the user didn't specify a write unit size, set it to one. */
    8160         130 :         if (bdev->write_unit_size == 0) {
    8161         126 :                 bdev->write_unit_size = 1;
    8162         126 :         }
    8163             : 
    8164             :         /* Set ACWU value to the write unit size if bdev module did not set it (does not support it natively) */
    8165         130 :         if (bdev->acwu == 0) {
    8166         126 :                 bdev->acwu = bdev->write_unit_size;
    8167         126 :         }
    8168             : 
    8169         130 :         if (bdev->phys_blocklen == 0) {
    8170         126 :                 bdev->phys_blocklen = spdk_bdev_get_data_block_size(bdev);
    8171         126 :         }
    8172             : 
    8173         130 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY)) {
    8174           0 :                 bdev->max_copy = bdev_get_max_write(bdev, iobuf_opts.large_bufsize);
    8175           0 :         }
    8176             : 
    8177         130 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)) {
    8178           0 :                 bdev->max_write_zeroes = bdev_get_max_write(bdev, ZERO_BUFFER_SIZE);
    8179           0 :         }
    8180             : 
    8181         130 :         bdev->internal.reset_in_progress = NULL;
    8182         130 :         bdev->internal.qd_poll_in_progress = false;
    8183         130 :         bdev->internal.period = 0;
    8184         130 :         bdev->internal.new_period = 0;
    8185         130 :         bdev->internal.trace_id = spdk_trace_register_owner(OWNER_TYPE_BDEV, bdev_name);
    8186             : 
    8187             :         /*
    8188             :          * Initialize spinlock before registering IO device because spinlock is used in
    8189             :          * bdev_channel_create
    8190             :          */
    8191         130 :         spdk_spin_init(&bdev->internal.spinlock);
    8192             : 
    8193         260 :         spdk_io_device_register(__bdev_to_io_dev(bdev),
    8194             :                                 bdev_channel_create, bdev_channel_destroy,
    8195             :                                 sizeof(struct spdk_bdev_channel),
    8196         130 :                                 bdev_name);
    8197             : 
    8198             :         /*
    8199             :          * Register bdev name only after the bdev object is ready.
    8200             :          * After bdev_name_add returns, it is possible for other threads to start using the bdev,
    8201             :          * create IO channels...
    8202             :          */
    8203         130 :         ret = bdev_name_add(&bdev->internal.bdev_name, bdev, bdev->name);
    8204         130 :         if (ret != 0) {
    8205           0 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), NULL);
    8206           0 :                 bdev_free_io_stat(bdev->internal.stat);
    8207           0 :                 spdk_spin_destroy(&bdev->internal.spinlock);
    8208           0 :                 free(bdev_name);
    8209           0 :                 return ret;
    8210             :         }
    8211             : 
    8212         130 :         free(bdev_name);
    8213             : 
    8214         130 :         SPDK_DEBUGLOG(bdev, "Inserting bdev %s into list\n", bdev->name);
    8215         130 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.bdevs, bdev, internal.link);
    8216             : 
    8217         130 :         return 0;
    8218         132 : }
    8219             : 
    8220             : static void
    8221         131 : bdev_destroy_cb(void *io_device)
    8222             : {
    8223             :         int                     rc;
    8224             :         struct spdk_bdev        *bdev;
    8225             :         spdk_bdev_unregister_cb cb_fn;
    8226             :         void                    *cb_arg;
    8227             : 
    8228         131 :         bdev = __bdev_from_io_dev(io_device);
    8229             : 
    8230         131 :         if (bdev->internal.unregister_td != spdk_get_thread()) {
    8231           1 :                 spdk_thread_send_msg(bdev->internal.unregister_td, bdev_destroy_cb, io_device);
    8232           1 :                 return;
    8233             :         }
    8234             : 
    8235         130 :         cb_fn = bdev->internal.unregister_cb;
    8236         130 :         cb_arg = bdev->internal.unregister_ctx;
    8237             : 
    8238         130 :         spdk_spin_destroy(&bdev->internal.spinlock);
    8239         130 :         free(bdev->internal.qos);
    8240         130 :         bdev_free_io_stat(bdev->internal.stat);
    8241         130 :         spdk_trace_unregister_owner(bdev->internal.trace_id);
    8242             : 
    8243         130 :         rc = bdev->fn_table->destruct(bdev->ctxt);
    8244         130 :         if (rc < 0) {
    8245           0 :                 SPDK_ERRLOG("destruct failed\n");
    8246           0 :         }
    8247         130 :         if (rc <= 0 && cb_fn != NULL) {
    8248          10 :                 cb_fn(cb_arg, rc);
    8249          10 :         }
    8250         131 : }
    8251             : 
    8252             : void
    8253           2 : spdk_bdev_destruct_done(struct spdk_bdev *bdev, int bdeverrno)
    8254             : {
    8255           2 :         if (bdev->internal.unregister_cb != NULL) {
    8256           0 :                 bdev->internal.unregister_cb(bdev->internal.unregister_ctx, bdeverrno);
    8257           0 :         }
    8258           2 : }
    8259             : 
    8260             : static void
    8261          19 : _remove_notify(void *arg)
    8262             : {
    8263          19 :         struct spdk_bdev_desc *desc = arg;
    8264             : 
    8265          19 :         _event_notify(desc, SPDK_BDEV_EVENT_REMOVE);
    8266          19 : }
    8267             : 
    8268             : /* returns: 0 - bdev removed and ready to be destructed.
    8269             :  *          -EBUSY - bdev can't be destructed yet.  */
    8270             : static int
    8271         145 : bdev_unregister_unsafe(struct spdk_bdev *bdev)
    8272             : {
    8273             :         struct spdk_bdev_desc   *desc, *tmp;
    8274             :         struct spdk_bdev_alias  *alias;
    8275         145 :         int                     rc = 0;
    8276             :         char                    uuid[SPDK_UUID_STRING_LEN];
    8277             : 
    8278         145 :         assert(spdk_spin_held(&g_bdev_mgr.spinlock));
    8279         145 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8280             : 
    8281             :         /* Notify each descriptor about hotremoval */
    8282         164 :         TAILQ_FOREACH_SAFE(desc, &bdev->internal.open_descs, link, tmp) {
    8283          19 :                 rc = -EBUSY;
    8284             :                 /*
    8285             :                  * Defer invocation of the event_cb to a separate message that will
    8286             :                  *  run later on its thread.  This ensures this context unwinds and
    8287             :                  *  we don't recursively unregister this bdev again if the event_cb
    8288             :                  *  immediately closes its descriptor.
    8289             :                  */
    8290          19 :                 event_notify(desc, _remove_notify);
    8291          19 :         }
    8292             : 
    8293             :         /* If there are no descriptors, proceed removing the bdev */
    8294         145 :         if (rc == 0) {
    8295         130 :                 bdev_examine_allowlist_remove(bdev->name);
    8296         258 :                 TAILQ_FOREACH(alias, &bdev->aliases, tailq) {
    8297         128 :                         bdev_examine_allowlist_remove(alias->alias.name);
    8298         128 :                 }
    8299         130 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    8300         130 :                 SPDK_DEBUGLOG(bdev, "Removing bdev %s from list done\n", bdev->name);
    8301             : 
    8302             :                 /* Delete the name and the UUID alias */
    8303         130 :                 spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    8304         130 :                 bdev_name_del_unsafe(&bdev->internal.bdev_name);
    8305         130 :                 bdev_alias_del(bdev, uuid, bdev_name_del_unsafe);
    8306             : 
    8307         130 :                 spdk_notify_send("bdev_unregister", spdk_bdev_get_name(bdev));
    8308             : 
    8309         130 :                 if (bdev->internal.reset_in_progress != NULL) {
    8310             :                         /* If reset is in progress, let the completion callback for reset
    8311             :                          * unregister the bdev.
    8312             :                          */
    8313           1 :                         rc = -EBUSY;
    8314           1 :                 }
    8315         130 :         }
    8316             : 
    8317         145 :         return rc;
    8318             : }
    8319             : 
    8320             : static void
    8321           4 : bdev_unregister_abort_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    8322             :                               struct spdk_io_channel *io_ch, void *_ctx)
    8323             : {
    8324           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    8325             : 
    8326           4 :         bdev_channel_abort_queued_ios(bdev_ch);
    8327           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    8328           4 : }
    8329             : 
    8330             : static void
    8331         130 : bdev_unregister(struct spdk_bdev *bdev, void *_ctx, int status)
    8332             : {
    8333             :         int rc;
    8334             : 
    8335         130 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8336         130 :         spdk_spin_lock(&bdev->internal.spinlock);
    8337             :         /*
    8338             :          * Set the status to REMOVING after completing to abort channels. Otherwise,
    8339             :          * the last spdk_bdev_close() may call spdk_io_device_unregister() while
    8340             :          * spdk_bdev_for_each_channel() is executed and spdk_io_device_unregister()
    8341             :          * may fail.
    8342             :          */
    8343         130 :         bdev->internal.status = SPDK_BDEV_STATUS_REMOVING;
    8344         130 :         rc = bdev_unregister_unsafe(bdev);
    8345         130 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8346         130 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8347             : 
    8348         130 :         if (rc == 0) {
    8349         114 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8350         114 :         }
    8351         130 : }
    8352             : 
    8353             : void
    8354         137 : spdk_bdev_unregister(struct spdk_bdev *bdev, spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8355             : {
    8356             :         struct spdk_thread      *thread;
    8357             : 
    8358         137 :         SPDK_DEBUGLOG(bdev, "Removing bdev %s from list\n", bdev->name);
    8359             : 
    8360         137 :         thread = spdk_get_thread();
    8361         137 :         if (!thread) {
    8362             :                 /* The user called this from a non-SPDK thread. */
    8363           0 :                 if (cb_fn != NULL) {
    8364           0 :                         cb_fn(cb_arg, -ENOTSUP);
    8365           0 :                 }
    8366           0 :                 return;
    8367             :         }
    8368             : 
    8369         137 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8370         137 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8371         137 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8372           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8373           7 :                 if (cb_fn) {
    8374           0 :                         cb_fn(cb_arg, -EBUSY);
    8375           0 :                 }
    8376           7 :                 return;
    8377             :         }
    8378             : 
    8379         130 :         spdk_spin_lock(&bdev->internal.spinlock);
    8380         130 :         bdev->internal.status = SPDK_BDEV_STATUS_UNREGISTERING;
    8381         130 :         bdev->internal.unregister_cb = cb_fn;
    8382         130 :         bdev->internal.unregister_ctx = cb_arg;
    8383         130 :         bdev->internal.unregister_td = thread;
    8384         130 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8385         130 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8386             : 
    8387         130 :         spdk_bdev_set_qd_sampling_period(bdev, 0);
    8388             : 
    8389         130 :         spdk_bdev_for_each_channel(bdev, bdev_unregister_abort_channel, bdev,
    8390             :                                    bdev_unregister);
    8391         137 : }
    8392             : 
    8393             : int
    8394           4 : spdk_bdev_unregister_by_name(const char *bdev_name, struct spdk_bdev_module *module,
    8395             :                              spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8396             : {
    8397             :         struct spdk_bdev_desc *desc;
    8398             :         struct spdk_bdev *bdev;
    8399             :         int rc;
    8400             : 
    8401           4 :         rc = spdk_bdev_open_ext(bdev_name, false, _tmp_bdev_event_cb, NULL, &desc);
    8402           4 :         if (rc != 0) {
    8403           1 :                 SPDK_ERRLOG("Failed to open bdev with name: %s\n", bdev_name);
    8404           1 :                 return rc;
    8405             :         }
    8406             : 
    8407           3 :         bdev = spdk_bdev_desc_get_bdev(desc);
    8408             : 
    8409           3 :         if (bdev->module != module) {
    8410           1 :                 spdk_bdev_close(desc);
    8411           1 :                 SPDK_ERRLOG("Bdev %s was not registered by the specified module.\n",
    8412             :                             bdev_name);
    8413           1 :                 return -ENODEV;
    8414             :         }
    8415             : 
    8416           2 :         spdk_bdev_unregister(bdev, cb_fn, cb_arg);
    8417             : 
    8418           2 :         spdk_bdev_close(desc);
    8419             : 
    8420           2 :         return 0;
    8421           4 : }
    8422             : 
    8423             : static int
    8424         269 : bdev_start_qos(struct spdk_bdev *bdev)
    8425             : {
    8426             :         struct set_qos_limit_ctx *ctx;
    8427             : 
    8428             :         /* Enable QoS */
    8429         269 :         if (bdev->internal.qos && bdev->internal.qos->thread == NULL) {
    8430           2 :                 ctx = calloc(1, sizeof(*ctx));
    8431           2 :                 if (ctx == NULL) {
    8432           0 :                         SPDK_ERRLOG("Failed to allocate memory for QoS context\n");
    8433           0 :                         return -ENOMEM;
    8434             :                 }
    8435           2 :                 ctx->bdev = bdev;
    8436           2 :                 spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx, bdev_enable_qos_done);
    8437           2 :         }
    8438             : 
    8439         269 :         return 0;
    8440         269 : }
    8441             : 
    8442             : static void
    8443          25 : log_already_claimed(enum spdk_log_level level, const int line, const char *func, const char *detail,
    8444             :                     struct spdk_bdev *bdev)
    8445             : {
    8446             :         enum spdk_bdev_claim_type type;
    8447             :         const char *typename, *modname;
    8448             :         extern struct spdk_log_flag SPDK_LOG_bdev;
    8449             : 
    8450          25 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8451             : 
    8452          25 :         if (level >= SPDK_LOG_INFO && !SPDK_LOG_bdev.enabled) {
    8453           0 :                 return;
    8454             :         }
    8455             : 
    8456          25 :         type = bdev->internal.claim_type;
    8457          25 :         typename = spdk_bdev_claim_get_name(type);
    8458             : 
    8459          25 :         if (type == SPDK_BDEV_CLAIM_EXCL_WRITE) {
    8460           6 :                 modname = bdev->internal.claim.v1.module->name;
    8461          12 :                 spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8462           6 :                          bdev->name, detail, typename, modname);
    8463           6 :                 return;
    8464             :         }
    8465             : 
    8466          19 :         if (claim_type_is_v2(type)) {
    8467             :                 struct spdk_bdev_module_claim *claim;
    8468             : 
    8469          38 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
    8470          19 :                         modname = claim->module->name;
    8471          38 :                         spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8472          19 :                                  bdev->name, detail, typename, modname);
    8473          19 :                 }
    8474          19 :                 return;
    8475             :         }
    8476             : 
    8477           0 :         assert(false);
    8478          25 : }
    8479             : 
    8480             : static int
    8481         278 : bdev_open(struct spdk_bdev *bdev, bool write, struct spdk_bdev_desc *desc)
    8482             : {
    8483             :         struct spdk_thread *thread;
    8484         278 :         int rc = 0;
    8485             : 
    8486         278 :         thread = spdk_get_thread();
    8487         278 :         if (!thread) {
    8488           0 :                 SPDK_ERRLOG("Cannot open bdev from non-SPDK thread.\n");
    8489           0 :                 return -ENOTSUP;
    8490             :         }
    8491             : 
    8492         278 :         SPDK_DEBUGLOG(bdev, "Opening descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8493             :                       spdk_get_thread());
    8494             : 
    8495         278 :         desc->bdev = bdev;
    8496         278 :         desc->thread = thread;
    8497         278 :         desc->write = write;
    8498             : 
    8499         278 :         spdk_spin_lock(&bdev->internal.spinlock);
    8500         278 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8501         278 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8502           3 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8503           3 :                 return -ENODEV;
    8504             :         }
    8505             : 
    8506         275 :         if (write && bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8507           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8508           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8509           6 :                 return -EPERM;
    8510             :         }
    8511             : 
    8512         269 :         rc = bdev_start_qos(bdev);
    8513         269 :         if (rc != 0) {
    8514           0 :                 SPDK_ERRLOG("Failed to start QoS on bdev %s\n", bdev->name);
    8515           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8516           0 :                 return rc;
    8517             :         }
    8518             : 
    8519         269 :         TAILQ_INSERT_TAIL(&bdev->internal.open_descs, desc, link);
    8520             : 
    8521         269 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8522             : 
    8523         269 :         return 0;
    8524         278 : }
    8525             : 
    8526             : static void
    8527         279 : bdev_open_opts_get_defaults(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8528             : {
    8529         279 :         if (!opts) {
    8530           0 :                 SPDK_ERRLOG("opts should not be NULL.\n");
    8531           0 :                 return;
    8532             :         }
    8533             : 
    8534         279 :         if (!opts_size) {
    8535           0 :                 SPDK_ERRLOG("opts_size should not be zero.\n");
    8536           0 :                 return;
    8537             :         }
    8538             : 
    8539         279 :         memset(opts, 0, opts_size);
    8540         279 :         opts->size = opts_size;
    8541             : 
    8542             : #define FIELD_OK(field) \
    8543             :         offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size
    8544             : 
    8545             : #define SET_FIELD(field, value) \
    8546             :         if (FIELD_OK(field)) { \
    8547             :                 opts->field = value; \
    8548             :         } \
    8549             : 
    8550         279 :         SET_FIELD(hide_metadata, false);
    8551             : 
    8552             : #undef FIELD_OK
    8553             : #undef SET_FIELD
    8554         279 : }
    8555             : 
    8556             : static void
    8557           2 : bdev_open_opts_copy(struct spdk_bdev_open_opts *opts,
    8558             :                     const struct spdk_bdev_open_opts *opts_src, size_t opts_size)
    8559             : {
    8560           2 :         assert(opts);
    8561           2 :         assert(opts_src);
    8562             : 
    8563             : #define SET_FIELD(field) \
    8564             :         if (offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size) { \
    8565             :                 opts->field = opts_src->field; \
    8566             :         } \
    8567             : 
    8568           2 :         SET_FIELD(hide_metadata);
    8569             : 
    8570           2 :         opts->size = opts_src->size;
    8571             : 
    8572             :         /* We should not remove this statement, but need to update the assert statement
    8573             :          * if we add a new field, and also add a corresponding SET_FIELD statement.
    8574             :          */
    8575             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_opts) == 16, "Incorrect size");
    8576             : 
    8577             : #undef SET_FIELD
    8578           2 : }
    8579             : 
    8580             : void
    8581           1 : spdk_bdev_open_opts_init(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8582             : {
    8583             :         struct spdk_bdev_open_opts opts_local;
    8584             : 
    8585           1 :         bdev_open_opts_get_defaults(&opts_local, sizeof(opts_local));
    8586           1 :         bdev_open_opts_copy(opts, &opts_local, opts_size);
    8587           1 : }
    8588             : 
    8589             : static int
    8590         278 : bdev_desc_alloc(struct spdk_bdev *bdev, spdk_bdev_event_cb_t event_cb, void *event_ctx,
    8591             :                 struct spdk_bdev_open_opts *user_opts, struct spdk_bdev_desc **_desc)
    8592             : {
    8593             :         struct spdk_bdev_desc *desc;
    8594             :         struct spdk_bdev_open_opts opts;
    8595             :         unsigned int i;
    8596             : 
    8597         278 :         bdev_open_opts_get_defaults(&opts, sizeof(opts));
    8598         278 :         if (user_opts != NULL) {
    8599           1 :                 bdev_open_opts_copy(&opts, user_opts, user_opts->size);
    8600           1 :         }
    8601             : 
    8602         278 :         desc = calloc(1, sizeof(*desc));
    8603         278 :         if (desc == NULL) {
    8604           0 :                 SPDK_ERRLOG("Failed to allocate memory for bdev descriptor\n");
    8605           0 :                 return -ENOMEM;
    8606             :         }
    8607             : 
    8608         278 :         desc->opts = opts;
    8609             : 
    8610         278 :         TAILQ_INIT(&desc->pending_media_events);
    8611         278 :         TAILQ_INIT(&desc->free_media_events);
    8612             : 
    8613         278 :         desc->memory_domains_supported = spdk_bdev_get_memory_domains(bdev, NULL, 0) > 0;
    8614         278 :         desc->callback.event_fn = event_cb;
    8615         278 :         desc->callback.ctx = event_ctx;
    8616         278 :         spdk_spin_init(&desc->spinlock);
    8617             : 
    8618         278 :         if (desc->opts.hide_metadata) {
    8619           1 :                 if (spdk_bdev_is_md_separate(bdev)) {
    8620           0 :                         SPDK_ERRLOG("hide_metadata option is not supported with separate metadata.\n");
    8621           0 :                         bdev_desc_free(desc);
    8622           0 :                         return -EINVAL;
    8623             :                 }
    8624           1 :         }
    8625             : 
    8626         278 :         if (bdev->media_events) {
    8627           0 :                 desc->media_events_buffer = calloc(MEDIA_EVENT_POOL_SIZE,
    8628             :                                                    sizeof(*desc->media_events_buffer));
    8629           0 :                 if (desc->media_events_buffer == NULL) {
    8630           0 :                         SPDK_ERRLOG("Failed to initialize media event pool\n");
    8631           0 :                         bdev_desc_free(desc);
    8632           0 :                         return -ENOMEM;
    8633             :                 }
    8634             : 
    8635           0 :                 for (i = 0; i < MEDIA_EVENT_POOL_SIZE; ++i) {
    8636           0 :                         TAILQ_INSERT_TAIL(&desc->free_media_events,
    8637             :                                           &desc->media_events_buffer[i], tailq);
    8638           0 :                 }
    8639           0 :         }
    8640             : 
    8641         278 :         if (bdev->fn_table->accel_sequence_supported != NULL) {
    8642           0 :                 for (i = 0; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    8643           0 :                         desc->accel_sequence_supported[i] =
    8644           0 :                                 bdev->fn_table->accel_sequence_supported(bdev->ctxt,
    8645           0 :                                                 (enum spdk_bdev_io_type)i);
    8646           0 :                 }
    8647           0 :         }
    8648             : 
    8649         278 :         *_desc = desc;
    8650             : 
    8651         278 :         return 0;
    8652         278 : }
    8653             : 
    8654             : static int
    8655         136 : bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8656             :               void *event_ctx, struct spdk_bdev_open_opts *opts,
    8657             :               struct spdk_bdev_desc **_desc)
    8658             : {
    8659             :         struct spdk_bdev_desc *desc;
    8660             :         struct spdk_bdev *bdev;
    8661             :         int rc;
    8662             : 
    8663         136 :         bdev = bdev_get_by_name(bdev_name);
    8664             : 
    8665         136 :         if (bdev == NULL) {
    8666           1 :                 SPDK_NOTICELOG("Currently unable to find bdev with name: %s\n", bdev_name);
    8667           1 :                 return -ENODEV;
    8668             :         }
    8669             : 
    8670         135 :         rc = bdev_desc_alloc(bdev, event_cb, event_ctx, opts, &desc);
    8671         135 :         if (rc != 0) {
    8672           0 :                 return rc;
    8673             :         }
    8674             : 
    8675         135 :         rc = bdev_open(bdev, write, desc);
    8676         135 :         if (rc != 0) {
    8677           7 :                 bdev_desc_free(desc);
    8678           7 :                 desc = NULL;
    8679           7 :         }
    8680             : 
    8681         135 :         *_desc = desc;
    8682             : 
    8683         135 :         return rc;
    8684         136 : }
    8685             : 
    8686             : int
    8687         138 : spdk_bdev_open_ext_v2(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8688             :                       void *event_ctx, struct spdk_bdev_open_opts *opts,
    8689             :                       struct spdk_bdev_desc **_desc)
    8690             : {
    8691             :         int rc;
    8692             : 
    8693         138 :         if (event_cb == NULL) {
    8694           2 :                 SPDK_ERRLOG("Missing event callback function\n");
    8695           2 :                 return -EINVAL;
    8696             :         }
    8697             : 
    8698         136 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8699         136 :         rc = bdev_open_ext(bdev_name, write, event_cb, event_ctx, opts, _desc);
    8700         136 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8701             : 
    8702         136 :         return rc;
    8703         138 : }
    8704             : 
    8705             : int
    8706         136 : spdk_bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8707             :                    void *event_ctx, struct spdk_bdev_desc **_desc)
    8708             : {
    8709         136 :         return spdk_bdev_open_ext_v2(bdev_name, write, event_cb, event_ctx, NULL, _desc);
    8710             : }
    8711             : 
    8712             : struct spdk_bdev_open_async_ctx {
    8713             :         char                                    *bdev_name;
    8714             :         spdk_bdev_event_cb_t                    event_cb;
    8715             :         void                                    *event_ctx;
    8716             :         bool                                    write;
    8717             :         int                                     rc;
    8718             :         spdk_bdev_open_async_cb_t               cb_fn;
    8719             :         void                                    *cb_arg;
    8720             :         struct spdk_bdev_desc                   *desc;
    8721             :         struct spdk_bdev_open_async_opts        opts;
    8722             :         uint64_t                                start_ticks;
    8723             :         struct spdk_thread                      *orig_thread;
    8724             :         struct spdk_poller                      *poller;
    8725             :         TAILQ_ENTRY(spdk_bdev_open_async_ctx)   tailq;
    8726             : };
    8727             : 
    8728             : static void
    8729           0 : bdev_open_async_done(void *arg)
    8730             : {
    8731           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8732             : 
    8733           0 :         ctx->cb_fn(ctx->desc, ctx->rc, ctx->cb_arg);
    8734             : 
    8735           0 :         free(ctx->bdev_name);
    8736           0 :         free(ctx);
    8737           0 : }
    8738             : 
    8739             : static void
    8740           0 : bdev_open_async_cancel(void *arg)
    8741             : {
    8742           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8743             : 
    8744           0 :         assert(ctx->rc == -ESHUTDOWN);
    8745             : 
    8746           0 :         spdk_poller_unregister(&ctx->poller);
    8747             : 
    8748           0 :         bdev_open_async_done(ctx);
    8749           0 : }
    8750             : 
    8751             : /* This is called when the bdev library finishes at shutdown. */
    8752             : static void
    8753          68 : bdev_open_async_fini(void)
    8754             : {
    8755             :         struct spdk_bdev_open_async_ctx *ctx, *tmp_ctx;
    8756             : 
    8757          68 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8758          68 :         TAILQ_FOREACH_SAFE(ctx, &g_bdev_mgr.async_bdev_opens, tailq, tmp_ctx) {
    8759           0 :                 TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8760             :                 /*
    8761             :                  * We have to move to ctx->orig_thread to unregister ctx->poller.
    8762             :                  * However, there is a chance that ctx->poller is executed before
    8763             :                  * message is executed, which could result in bdev_open_async_done()
    8764             :                  * being called twice. To avoid such race condition, set ctx->rc to
    8765             :                  * -ESHUTDOWN.
    8766             :                  */
    8767           0 :                 ctx->rc = -ESHUTDOWN;
    8768           0 :                 spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_cancel, ctx);
    8769           0 :         }
    8770          68 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8771          68 : }
    8772             : 
    8773             : static int bdev_open_async(void *arg);
    8774             : 
    8775             : static void
    8776           0 : _bdev_open_async(struct spdk_bdev_open_async_ctx *ctx)
    8777             : {
    8778             :         uint64_t timeout_ticks;
    8779             : 
    8780           0 :         if (ctx->rc == -ESHUTDOWN) {
    8781             :                 /* This context is being canceled. Do nothing. */
    8782           0 :                 return;
    8783             :         }
    8784             : 
    8785           0 :         ctx->rc = bdev_open_ext(ctx->bdev_name, ctx->write, ctx->event_cb, ctx->event_ctx,
    8786           0 :                                 NULL, &ctx->desc);
    8787           0 :         if (ctx->rc == 0 || ctx->opts.timeout_ms == 0) {
    8788           0 :                 goto exit;
    8789             :         }
    8790             : 
    8791           0 :         timeout_ticks = ctx->start_ticks + ctx->opts.timeout_ms * spdk_get_ticks_hz() / 1000ull;
    8792           0 :         if (spdk_get_ticks() >= timeout_ticks) {
    8793           0 :                 SPDK_ERRLOG("Timed out while waiting for bdev '%s' to appear\n", ctx->bdev_name);
    8794           0 :                 ctx->rc = -ETIMEDOUT;
    8795           0 :                 goto exit;
    8796             :         }
    8797             : 
    8798           0 :         return;
    8799             : 
    8800             : exit:
    8801           0 :         spdk_poller_unregister(&ctx->poller);
    8802           0 :         TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8803             : 
    8804             :         /* Completion callback is processed after stack unwinding. */
    8805           0 :         spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_done, ctx);
    8806           0 : }
    8807             : 
    8808             : static int
    8809           0 : bdev_open_async(void *arg)
    8810             : {
    8811           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8812             : 
    8813           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8814             : 
    8815           0 :         _bdev_open_async(ctx);
    8816             : 
    8817           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8818             : 
    8819           0 :         return SPDK_POLLER_BUSY;
    8820             : }
    8821             : 
    8822             : static void
    8823           0 : bdev_open_async_opts_copy(struct spdk_bdev_open_async_opts *opts,
    8824             :                           struct spdk_bdev_open_async_opts *opts_src,
    8825             :                           size_t size)
    8826             : {
    8827           0 :         assert(opts);
    8828           0 :         assert(opts_src);
    8829             : 
    8830           0 :         opts->size = size;
    8831             : 
    8832             : #define SET_FIELD(field) \
    8833             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8834             :                 opts->field = opts_src->field; \
    8835             :         } \
    8836             : 
    8837           0 :         SET_FIELD(timeout_ms);
    8838             : 
    8839             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
    8840             :          * and do not forget to add the SET_FIELD statement for your added field. */
    8841             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_async_opts) == 16, "Incorrect size");
    8842             : 
    8843             : #undef SET_FIELD
    8844           0 : }
    8845             : 
    8846             : static void
    8847           0 : bdev_open_async_opts_get_default(struct spdk_bdev_open_async_opts *opts, size_t size)
    8848             : {
    8849           0 :         assert(opts);
    8850             : 
    8851           0 :         opts->size = size;
    8852             : 
    8853             : #define SET_FIELD(field, value) \
    8854             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8855             :                 opts->field = value; \
    8856             :         } \
    8857             : 
    8858           0 :         SET_FIELD(timeout_ms, 0);
    8859             : 
    8860             : #undef SET_FIELD
    8861           0 : }
    8862             : 
    8863             : int
    8864           0 : spdk_bdev_open_async(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8865             :                      void *event_ctx, struct spdk_bdev_open_async_opts *opts,
    8866             :                      spdk_bdev_open_async_cb_t open_cb, void *open_cb_arg)
    8867             : {
    8868             :         struct spdk_bdev_open_async_ctx *ctx;
    8869             : 
    8870           0 :         if (event_cb == NULL) {
    8871           0 :                 SPDK_ERRLOG("Missing event callback function\n");
    8872           0 :                 return -EINVAL;
    8873             :         }
    8874             : 
    8875           0 :         if (open_cb == NULL) {
    8876           0 :                 SPDK_ERRLOG("Missing open callback function\n");
    8877           0 :                 return -EINVAL;
    8878             :         }
    8879             : 
    8880           0 :         if (opts != NULL && opts->size == 0) {
    8881           0 :                 SPDK_ERRLOG("size in the options structure should not be zero\n");
    8882           0 :                 return -EINVAL;
    8883             :         }
    8884             : 
    8885           0 :         ctx = calloc(1, sizeof(*ctx));
    8886           0 :         if (ctx == NULL) {
    8887           0 :                 SPDK_ERRLOG("Failed to allocate open context\n");
    8888           0 :                 return -ENOMEM;
    8889             :         }
    8890             : 
    8891           0 :         ctx->bdev_name = strdup(bdev_name);
    8892           0 :         if (ctx->bdev_name == NULL) {
    8893           0 :                 SPDK_ERRLOG("Failed to duplicate bdev_name\n");
    8894           0 :                 free(ctx);
    8895           0 :                 return -ENOMEM;
    8896             :         }
    8897             : 
    8898           0 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_open_async, ctx, 100 * 1000);
    8899           0 :         if (ctx->poller == NULL) {
    8900           0 :                 SPDK_ERRLOG("Failed to register bdev_open_async poller\n");
    8901           0 :                 free(ctx->bdev_name);
    8902           0 :                 free(ctx);
    8903           0 :                 return -ENOMEM;
    8904             :         }
    8905             : 
    8906           0 :         ctx->cb_fn = open_cb;
    8907           0 :         ctx->cb_arg = open_cb_arg;
    8908           0 :         ctx->write = write;
    8909           0 :         ctx->event_cb = event_cb;
    8910           0 :         ctx->event_ctx = event_ctx;
    8911           0 :         ctx->orig_thread = spdk_get_thread();
    8912           0 :         ctx->start_ticks = spdk_get_ticks();
    8913             : 
    8914           0 :         bdev_open_async_opts_get_default(&ctx->opts, sizeof(ctx->opts));
    8915           0 :         if (opts != NULL) {
    8916           0 :                 bdev_open_async_opts_copy(&ctx->opts, opts, opts->size);
    8917           0 :         }
    8918             : 
    8919           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8920             : 
    8921           0 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8922           0 :         _bdev_open_async(ctx);
    8923             : 
    8924           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8925             : 
    8926           0 :         return 0;
    8927           0 : }
    8928             : 
    8929             : static void
    8930         269 : bdev_close(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc)
    8931             : {
    8932             :         int rc;
    8933             : 
    8934         269 :         spdk_spin_lock(&bdev->internal.spinlock);
    8935         269 :         spdk_spin_lock(&desc->spinlock);
    8936             : 
    8937         269 :         TAILQ_REMOVE(&bdev->internal.open_descs, desc, link);
    8938             : 
    8939         269 :         desc->closed = true;
    8940             : 
    8941         269 :         if (desc->claim != NULL) {
    8942          20 :                 bdev_desc_release_claims(desc);
    8943          20 :         }
    8944             : 
    8945         269 :         if (0 == desc->refs) {
    8946         258 :                 spdk_spin_unlock(&desc->spinlock);
    8947         258 :                 bdev_desc_free(desc);
    8948         258 :         } else {
    8949          11 :                 spdk_spin_unlock(&desc->spinlock);
    8950             :         }
    8951             : 
    8952             :         /* If no more descriptors, kill QoS channel */
    8953         269 :         if (bdev->internal.qos && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8954           7 :                 SPDK_DEBUGLOG(bdev, "Closed last descriptor for bdev %s on thread %p. Stopping QoS.\n",
    8955             :                               bdev->name, spdk_get_thread());
    8956             : 
    8957           7 :                 if (bdev_qos_destroy(bdev)) {
    8958             :                         /* There isn't anything we can do to recover here. Just let the
    8959             :                          * old QoS poller keep running. The QoS handling won't change
    8960             :                          * cores when the user allocates a new channel, but it won't break. */
    8961           0 :                         SPDK_ERRLOG("Unable to shut down QoS poller. It will continue running on the current thread.\n");
    8962           0 :                 }
    8963           7 :         }
    8964             : 
    8965         269 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8966          15 :                 rc = bdev_unregister_unsafe(bdev);
    8967          15 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8968             : 
    8969          15 :                 if (rc == 0) {
    8970          15 :                         spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8971          15 :                 }
    8972          15 :         } else {
    8973         254 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8974             :         }
    8975         269 : }
    8976             : 
    8977             : void
    8978         128 : spdk_bdev_close(struct spdk_bdev_desc *desc)
    8979             : {
    8980         128 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    8981             : 
    8982         128 :         SPDK_DEBUGLOG(bdev, "Closing descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8983             :                       spdk_get_thread());
    8984             : 
    8985         128 :         assert(desc->thread == spdk_get_thread());
    8986             : 
    8987         128 :         spdk_poller_unregister(&desc->io_timeout_poller);
    8988             : 
    8989         128 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8990             : 
    8991         128 :         bdev_close(bdev, desc);
    8992             : 
    8993         128 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8994         128 : }
    8995             : 
    8996             : int32_t
    8997           3 : spdk_bdev_get_numa_id(struct spdk_bdev *bdev)
    8998             : {
    8999           3 :         if (bdev->numa.id_valid) {
    9000           2 :                 return bdev->numa.id;
    9001             :         } else {
    9002           1 :                 return SPDK_ENV_NUMA_ID_ANY;
    9003             :         }
    9004           3 : }
    9005             : 
    9006             : static void
    9007         130 : bdev_register_finished(void *arg)
    9008             : {
    9009         130 :         struct spdk_bdev_desc *desc = arg;
    9010         130 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    9011             : 
    9012         130 :         spdk_notify_send("bdev_register", spdk_bdev_get_name(bdev));
    9013             : 
    9014         130 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9015             : 
    9016         130 :         bdev_close(bdev, desc);
    9017             : 
    9018         130 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9019         130 : }
    9020             : 
    9021             : int
    9022         133 : spdk_bdev_register(struct spdk_bdev *bdev)
    9023             : {
    9024             :         struct spdk_bdev_desc *desc;
    9025         133 :         struct spdk_thread *thread = spdk_get_thread();
    9026             :         int rc;
    9027             : 
    9028         133 :         if (spdk_unlikely(!spdk_thread_is_app_thread(NULL))) {
    9029           1 :                 SPDK_ERRLOG("Cannot register bdev %s on thread %p (%s)\n", bdev->name, thread,
    9030             :                             thread ? spdk_thread_get_name(thread) : "null");
    9031           1 :                 return -EINVAL;
    9032             :         }
    9033             : 
    9034         132 :         rc = bdev_register(bdev);
    9035         132 :         if (rc != 0) {
    9036           2 :                 return rc;
    9037             :         }
    9038             : 
    9039             :         /* A descriptor is opened to prevent bdev deletion during examination */
    9040         130 :         rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9041         130 :         if (rc != 0) {
    9042           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    9043           0 :                 return rc;
    9044             :         }
    9045             : 
    9046         130 :         rc = bdev_open(bdev, false, desc);
    9047         130 :         if (rc != 0) {
    9048           0 :                 bdev_desc_free(desc);
    9049           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    9050           0 :                 return rc;
    9051             :         }
    9052             : 
    9053             :         /* Examine configuration before initializing I/O */
    9054         130 :         bdev_examine(bdev);
    9055             : 
    9056         130 :         rc = spdk_bdev_wait_for_examine(bdev_register_finished, desc);
    9057         130 :         if (rc != 0) {
    9058           0 :                 bdev_close(bdev, desc);
    9059           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    9060           0 :         }
    9061             : 
    9062         130 :         return rc;
    9063         133 : }
    9064             : 
    9065             : int
    9066          26 : spdk_bdev_module_claim_bdev(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc,
    9067             :                             struct spdk_bdev_module *module)
    9068             : {
    9069          26 :         spdk_spin_lock(&bdev->internal.spinlock);
    9070             : 
    9071          26 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    9072           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9073           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9074           6 :                 return -EPERM;
    9075             :         }
    9076             : 
    9077          20 :         if (desc && !desc->write) {
    9078           5 :                 desc->write = true;
    9079           5 :         }
    9080             : 
    9081          20 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_EXCL_WRITE;
    9082          20 :         bdev->internal.claim.v1.module = module;
    9083             : 
    9084          20 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9085          20 :         return 0;
    9086          26 : }
    9087             : 
    9088             : void
    9089           8 : spdk_bdev_module_release_bdev(struct spdk_bdev *bdev)
    9090             : {
    9091           8 :         spdk_spin_lock(&bdev->internal.spinlock);
    9092             : 
    9093           8 :         assert(bdev->internal.claim.v1.module != NULL);
    9094           8 :         assert(bdev->internal.claim_type == SPDK_BDEV_CLAIM_EXCL_WRITE);
    9095           8 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    9096           8 :         bdev->internal.claim.v1.module = NULL;
    9097             : 
    9098           8 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9099           8 : }
    9100             : 
    9101             : /*
    9102             :  * Start claims v2
    9103             :  */
    9104             : 
    9105             : const char *
    9106          25 : spdk_bdev_claim_get_name(enum spdk_bdev_claim_type type)
    9107             : {
    9108          25 :         switch (type) {
    9109             :         case SPDK_BDEV_CLAIM_NONE:
    9110           0 :                 return "not_claimed";
    9111             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    9112           6 :                 return "exclusive_write";
    9113             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9114           8 :                 return "read_many_write_one";
    9115             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    9116           5 :                 return "read_many_write_none";
    9117             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9118           6 :                 return "read_many_write_many";
    9119             :         default:
    9120           0 :                 break;
    9121             :         }
    9122           0 :         return "invalid_claim";
    9123          25 : }
    9124             : 
    9125             : static bool
    9126         115 : claim_type_is_v2(enum spdk_bdev_claim_type type)
    9127             : {
    9128         115 :         switch (type) {
    9129             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9130             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    9131             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9132         115 :                 return true;
    9133             :         default:
    9134           0 :                 break;
    9135             :         }
    9136           0 :         return false;
    9137         115 : }
    9138             : 
    9139             : /* Returns true if taking a claim with desc->write == false should make the descriptor writable. */
    9140             : static bool
    9141          17 : claim_type_promotes_to_write(enum spdk_bdev_claim_type type)
    9142             : {
    9143          17 :         switch (type) {
    9144             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9145             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9146           6 :                 return true;
    9147             :         default:
    9148          11 :                 break;
    9149             :         }
    9150          11 :         return false;
    9151          17 : }
    9152             : 
    9153             : void
    9154          57 : spdk_bdev_claim_opts_init(struct spdk_bdev_claim_opts *opts, size_t size)
    9155             : {
    9156          57 :         if (opts == NULL) {
    9157           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    9158           0 :                 assert(opts != NULL);
    9159           0 :                 return;
    9160             :         }
    9161          57 :         if (size == 0) {
    9162           0 :                 SPDK_ERRLOG("size should not be zero\n");
    9163           0 :                 assert(size != 0);
    9164           0 :                 return;
    9165             :         }
    9166             : 
    9167          57 :         memset(opts, 0, size);
    9168          57 :         opts->opts_size = size;
    9169             : 
    9170             : #define FIELD_OK(field) \
    9171             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(opts->field) <= size
    9172             : 
    9173             : #define SET_FIELD(field, value) \
    9174             :         if (FIELD_OK(field)) { \
    9175             :                 opts->field = value; \
    9176             :         } \
    9177             : 
    9178          57 :         SET_FIELD(shared_claim_key, 0);
    9179             : 
    9180             : #undef FIELD_OK
    9181             : #undef SET_FIELD
    9182          57 : }
    9183             : 
    9184             : static int
    9185          22 : claim_opts_copy(struct spdk_bdev_claim_opts *src, struct spdk_bdev_claim_opts *dst)
    9186             : {
    9187          22 :         if (src->opts_size == 0) {
    9188           0 :                 SPDK_ERRLOG("size should not be zero\n");
    9189           0 :                 return -1;
    9190             :         }
    9191             : 
    9192          22 :         memset(dst, 0, sizeof(*dst));
    9193          22 :         dst->opts_size = src->opts_size;
    9194             : 
    9195             : #define FIELD_OK(field) \
    9196             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(src->field) <= src->opts_size
    9197             : 
    9198             : #define SET_FIELD(field) \
    9199             :         if (FIELD_OK(field)) { \
    9200             :                 dst->field = src->field; \
    9201             :         } \
    9202             : 
    9203          22 :         if (FIELD_OK(name)) {
    9204          22 :                 snprintf(dst->name, sizeof(dst->name), "%s", src->name);
    9205          22 :         }
    9206             : 
    9207          22 :         SET_FIELD(shared_claim_key);
    9208             : 
    9209             :         /* You should not remove this statement, but need to update the assert statement
    9210             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
    9211             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_claim_opts) == 48, "Incorrect size");
    9212             : 
    9213             : #undef FIELD_OK
    9214             : #undef SET_FIELD
    9215          22 :         return 0;
    9216          22 : }
    9217             : 
    9218             : /* Returns 0 if a read-write-once claim can be taken. */
    9219             : static int
    9220          10 : claim_verify_rwo(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9221             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9222             : {
    9223          10 :         struct spdk_bdev *bdev = desc->bdev;
    9224             :         struct spdk_bdev_desc *open_desc;
    9225             : 
    9226          10 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9227          10 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE);
    9228             : 
    9229          10 :         if (opts->shared_claim_key != 0) {
    9230           1 :                 SPDK_ERRLOG("%s: key option not supported with read-write-once claims\n",
    9231             :                             bdev->name);
    9232           1 :                 return -EINVAL;
    9233             :         }
    9234           9 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    9235           1 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9236           1 :                 return -EPERM;
    9237             :         }
    9238           8 :         if (desc->claim != NULL) {
    9239           0 :                 SPDK_NOTICELOG("%s: descriptor already claimed bdev with module %s\n",
    9240             :                                bdev->name, desc->claim->module->name);
    9241           0 :                 return -EPERM;
    9242             :         }
    9243          16 :         TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9244          10 :                 if (desc != open_desc && open_desc->write) {
    9245           2 :                         SPDK_NOTICELOG("%s: Cannot obtain read-write-once claim while "
    9246             :                                        "another descriptor is open for writing\n",
    9247             :                                        bdev->name);
    9248           2 :                         return -EPERM;
    9249             :                 }
    9250           8 :         }
    9251             : 
    9252           6 :         return 0;
    9253          10 : }
    9254             : 
    9255             : /* Returns 0 if a read-only-many claim can be taken. */
    9256             : static int
    9257          15 : claim_verify_rom(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9258             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9259             : {
    9260          15 :         struct spdk_bdev *bdev = desc->bdev;
    9261             :         struct spdk_bdev_desc *open_desc;
    9262             : 
    9263          15 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9264          15 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE);
    9265          15 :         assert(desc->claim == NULL);
    9266             : 
    9267          15 :         if (desc->write) {
    9268           3 :                 SPDK_ERRLOG("%s: Cannot obtain read-only-many claim with writable descriptor\n",
    9269             :                             bdev->name);
    9270           3 :                 return -EINVAL;
    9271             :         }
    9272          12 :         if (opts->shared_claim_key != 0) {
    9273           1 :                 SPDK_ERRLOG("%s: key option not supported with read-only-may claims\n", bdev->name);
    9274           1 :                 return -EINVAL;
    9275             :         }
    9276          11 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9277          19 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9278          11 :                         if (open_desc->write) {
    9279           0 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-only-many claim while "
    9280             :                                                "another descriptor is open for writing\n",
    9281             :                                                bdev->name);
    9282           0 :                                 return -EPERM;
    9283             :                         }
    9284          11 :                 }
    9285           8 :         }
    9286             : 
    9287          11 :         return 0;
    9288          15 : }
    9289             : 
    9290             : /* Returns 0 if a read-write-many claim can be taken. */
    9291             : static int
    9292           8 : claim_verify_rwm(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9293             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9294             : {
    9295           8 :         struct spdk_bdev *bdev = desc->bdev;
    9296             :         struct spdk_bdev_desc *open_desc;
    9297             : 
    9298           8 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9299           8 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED);
    9300           8 :         assert(desc->claim == NULL);
    9301             : 
    9302           8 :         if (opts->shared_claim_key == 0) {
    9303           2 :                 SPDK_ERRLOG("%s: shared_claim_key option required with read-write-may claims\n",
    9304             :                             bdev->name);
    9305           2 :                 return -EINVAL;
    9306             :         }
    9307           6 :         switch (bdev->internal.claim_type) {
    9308             :         case SPDK_BDEV_CLAIM_NONE:
    9309           7 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9310           5 :                         if (open_desc == desc) {
    9311           3 :                                 continue;
    9312             :                         }
    9313           2 :                         if (open_desc->write) {
    9314           2 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-write-many claim while "
    9315             :                                                "another descriptor is open for writing without a "
    9316             :                                                "claim\n", bdev->name);
    9317           2 :                                 return -EPERM;
    9318             :                         }
    9319           0 :                 }
    9320           2 :                 break;
    9321             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9322           2 :                 if (opts->shared_claim_key != bdev->internal.claim.v2.key) {
    9323           1 :                         LOG_ALREADY_CLAIMED_ERROR("already claimed with another key", bdev);
    9324           1 :                         return -EPERM;
    9325             :                 }
    9326           1 :                 break;
    9327             :         default:
    9328           0 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9329           0 :                 return -EBUSY;
    9330             :         }
    9331             : 
    9332           3 :         return 0;
    9333           8 : }
    9334             : 
    9335             : /* Updates desc and its bdev with a v2 claim. */
    9336             : static int
    9337          20 : claim_bdev(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9338             :            struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9339             : {
    9340          20 :         struct spdk_bdev *bdev = desc->bdev;
    9341             :         struct spdk_bdev_module_claim *claim;
    9342             : 
    9343          20 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9344          20 :         assert(claim_type_is_v2(type));
    9345          20 :         assert(desc->claim == NULL);
    9346             : 
    9347          20 :         claim = calloc(1, sizeof(*desc->claim));
    9348          20 :         if (claim == NULL) {
    9349           0 :                 SPDK_ERRLOG("%s: out of memory while allocating claim\n", bdev->name);
    9350           0 :                 return -ENOMEM;
    9351             :         }
    9352          20 :         claim->module = module;
    9353          20 :         claim->desc = desc;
    9354             :         SPDK_STATIC_ASSERT(sizeof(claim->name) == sizeof(opts->name), "sizes must match");
    9355          20 :         memcpy(claim->name, opts->name, sizeof(claim->name));
    9356          20 :         desc->claim = claim;
    9357             : 
    9358          20 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9359          16 :                 bdev->internal.claim_type = type;
    9360          16 :                 TAILQ_INIT(&bdev->internal.claim.v2.claims);
    9361          16 :                 bdev->internal.claim.v2.key = opts->shared_claim_key;
    9362          16 :         }
    9363          20 :         assert(type == bdev->internal.claim_type);
    9364             : 
    9365          20 :         TAILQ_INSERT_TAIL(&bdev->internal.claim.v2.claims, claim, link);
    9366             : 
    9367          20 :         if (!desc->write && claim_type_promotes_to_write(type)) {
    9368           6 :                 desc->write = true;
    9369           6 :         }
    9370             : 
    9371          20 :         return 0;
    9372          20 : }
    9373             : 
    9374             : int
    9375          44 : spdk_bdev_module_claim_bdev_desc(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9376             :                                  struct spdk_bdev_claim_opts *_opts,
    9377             :                                  struct spdk_bdev_module *module)
    9378             : {
    9379             :         struct spdk_bdev *bdev;
    9380             :         struct spdk_bdev_claim_opts opts;
    9381          44 :         int rc = 0;
    9382             : 
    9383          44 :         if (desc == NULL) {
    9384           0 :                 SPDK_ERRLOG("descriptor must not be NULL\n");
    9385           0 :                 return -EINVAL;
    9386             :         }
    9387             : 
    9388          44 :         bdev = desc->bdev;
    9389             : 
    9390          44 :         if (_opts == NULL) {
    9391          22 :                 spdk_bdev_claim_opts_init(&opts, sizeof(opts));
    9392          44 :         } else if (claim_opts_copy(_opts, &opts) != 0) {
    9393           0 :                 return -EINVAL;
    9394             :         }
    9395             : 
    9396          44 :         spdk_spin_lock(&bdev->internal.spinlock);
    9397             : 
    9398          44 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE &&
    9399          17 :             bdev->internal.claim_type != type) {
    9400          11 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9401          11 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9402          11 :                 return -EPERM;
    9403             :         }
    9404             : 
    9405          33 :         if (claim_type_is_v2(type) && desc->claim != NULL) {
    9406           0 :                 SPDK_ERRLOG("%s: descriptor already has %s claim with name '%s'\n",
    9407             :                             bdev->name, spdk_bdev_claim_get_name(type), desc->claim->name);
    9408           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9409           0 :                 return -EPERM;
    9410             :         }
    9411             : 
    9412          33 :         switch (type) {
    9413             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    9414           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9415           0 :                 return spdk_bdev_module_claim_bdev(bdev, desc, module);
    9416             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9417          10 :                 rc = claim_verify_rwo(desc, type, &opts, module);
    9418          10 :                 break;
    9419             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    9420          15 :                 rc = claim_verify_rom(desc, type, &opts, module);
    9421          15 :                 break;
    9422             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9423           8 :                 rc = claim_verify_rwm(desc, type, &opts, module);
    9424           8 :                 break;
    9425             :         default:
    9426           0 :                 SPDK_ERRLOG("%s: claim type %d not supported\n", bdev->name, type);
    9427           0 :                 rc = -ENOTSUP;
    9428           0 :         }
    9429             : 
    9430          33 :         if (rc == 0) {
    9431          20 :                 rc = claim_bdev(desc, type, &opts, module);
    9432          20 :         }
    9433             : 
    9434          33 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9435          33 :         return rc;
    9436          44 : }
    9437             : 
    9438             : static void
    9439          16 : claim_reset(struct spdk_bdev *bdev)
    9440             : {
    9441          16 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9442          16 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9443          16 :         assert(TAILQ_EMPTY(&bdev->internal.claim.v2.claims));
    9444             : 
    9445          16 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    9446          16 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    9447          16 : }
    9448             : 
    9449             : static void
    9450          20 : bdev_desc_release_claims(struct spdk_bdev_desc *desc)
    9451             : {
    9452          20 :         struct spdk_bdev *bdev = desc->bdev;
    9453             : 
    9454          20 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9455          20 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9456             : 
    9457          20 :         if (bdev->internal.examine_in_progress == 0) {
    9458          20 :                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, desc->claim, link);
    9459          20 :                 free(desc->claim);
    9460          20 :                 if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
    9461          16 :                         claim_reset(bdev);
    9462          16 :                 }
    9463          20 :         } else {
    9464             :                 /* This is a dead claim that will be cleaned up when bdev_examine() is done. */
    9465           0 :                 desc->claim->module = NULL;
    9466           0 :                 desc->claim->desc = NULL;
    9467             :         }
    9468          20 :         desc->claim = NULL;
    9469          20 : }
    9470             : 
    9471             : /*
    9472             :  * End claims v2
    9473             :  */
    9474             : 
    9475             : struct spdk_bdev *
    9476        1554 : spdk_bdev_desc_get_bdev(struct spdk_bdev_desc *desc)
    9477             : {
    9478        1554 :         assert(desc != NULL);
    9479        1554 :         return desc->bdev;
    9480             : }
    9481             : 
    9482             : int
    9483           1 : spdk_for_each_bdev(void *ctx, spdk_for_each_bdev_fn fn)
    9484             : {
    9485             :         struct spdk_bdev *bdev, *tmp;
    9486             :         struct spdk_bdev_desc *desc;
    9487           1 :         int rc = 0;
    9488             : 
    9489           1 :         assert(fn != NULL);
    9490             : 
    9491           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9492           1 :         bdev = spdk_bdev_first();
    9493           9 :         while (bdev != NULL) {
    9494           8 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9495           8 :                 if (rc != 0) {
    9496           0 :                         break;
    9497             :                 }
    9498           8 :                 rc = bdev_open(bdev, false, desc);
    9499           8 :                 if (rc != 0) {
    9500           1 :                         bdev_desc_free(desc);
    9501           1 :                         if (rc == -ENODEV) {
    9502             :                                 /* Ignore the error and move to the next bdev. */
    9503           1 :                                 rc = 0;
    9504           1 :                                 bdev = spdk_bdev_next(bdev);
    9505           1 :                                 continue;
    9506             :                         }
    9507           0 :                         break;
    9508             :                 }
    9509           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9510             : 
    9511           7 :                 rc = fn(ctx, bdev);
    9512             : 
    9513           7 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9514           7 :                 tmp = spdk_bdev_next(bdev);
    9515           7 :                 bdev_close(bdev, desc);
    9516           7 :                 if (rc != 0) {
    9517           0 :                         break;
    9518             :                 }
    9519           7 :                 bdev = tmp;
    9520             :         }
    9521           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9522             : 
    9523           1 :         return rc;
    9524             : }
    9525             : 
    9526             : int
    9527           1 : spdk_for_each_bdev_leaf(void *ctx, spdk_for_each_bdev_fn fn)
    9528             : {
    9529             :         struct spdk_bdev *bdev, *tmp;
    9530             :         struct spdk_bdev_desc *desc;
    9531           1 :         int rc = 0;
    9532             : 
    9533           1 :         assert(fn != NULL);
    9534             : 
    9535           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9536           1 :         bdev = spdk_bdev_first_leaf();
    9537           6 :         while (bdev != NULL) {
    9538           5 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9539           5 :                 if (rc != 0) {
    9540           0 :                         break;
    9541             :                 }
    9542           5 :                 rc = bdev_open(bdev, false, desc);
    9543           5 :                 if (rc != 0) {
    9544           1 :                         bdev_desc_free(desc);
    9545           1 :                         if (rc == -ENODEV) {
    9546             :                                 /* Ignore the error and move to the next bdev. */
    9547           1 :                                 rc = 0;
    9548           1 :                                 bdev = spdk_bdev_next_leaf(bdev);
    9549           1 :                                 continue;
    9550             :                         }
    9551           0 :                         break;
    9552             :                 }
    9553           4 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9554             : 
    9555           4 :                 rc = fn(ctx, bdev);
    9556             : 
    9557           4 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9558           4 :                 tmp = spdk_bdev_next_leaf(bdev);
    9559           4 :                 bdev_close(bdev, desc);
    9560           4 :                 if (rc != 0) {
    9561           0 :                         break;
    9562             :                 }
    9563           4 :                 bdev = tmp;
    9564             :         }
    9565           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9566             : 
    9567           1 :         return rc;
    9568             : }
    9569             : 
    9570             : void
    9571           0 : spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp)
    9572             : {
    9573             :         struct iovec *iovs;
    9574             :         int iovcnt;
    9575             : 
    9576           0 :         if (bdev_io == NULL) {
    9577           0 :                 return;
    9578             :         }
    9579             : 
    9580           0 :         switch (bdev_io->type) {
    9581             :         case SPDK_BDEV_IO_TYPE_READ:
    9582             :         case SPDK_BDEV_IO_TYPE_WRITE:
    9583             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    9584           0 :                 iovs = bdev_io->u.bdev.iovs;
    9585           0 :                 iovcnt = bdev_io->u.bdev.iovcnt;
    9586           0 :                 break;
    9587             :         default:
    9588           0 :                 iovs = NULL;
    9589           0 :                 iovcnt = 0;
    9590           0 :                 break;
    9591             :         }
    9592             : 
    9593           0 :         if (iovp) {
    9594           0 :                 *iovp = iovs;
    9595           0 :         }
    9596           0 :         if (iovcntp) {
    9597           0 :                 *iovcntp = iovcnt;
    9598           0 :         }
    9599           0 : }
    9600             : 
    9601             : void *
    9602           0 : spdk_bdev_io_get_md_buf(struct spdk_bdev_io *bdev_io)
    9603             : {
    9604           0 :         if (bdev_io == NULL) {
    9605           0 :                 return NULL;
    9606             :         }
    9607             : 
    9608           0 :         if (!spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9609           0 :                 return NULL;
    9610             :         }
    9611             : 
    9612           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    9613           0 :             bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    9614           0 :                 return bdev_io->u.bdev.md_buf;
    9615             :         }
    9616             : 
    9617           0 :         return NULL;
    9618           0 : }
    9619             : 
    9620             : void *
    9621           0 : spdk_bdev_io_get_cb_arg(struct spdk_bdev_io *bdev_io)
    9622             : {
    9623           0 :         if (bdev_io == NULL) {
    9624           0 :                 assert(false);
    9625             :                 return NULL;
    9626             :         }
    9627             : 
    9628           0 :         return bdev_io->internal.caller_ctx;
    9629             : }
    9630             : 
    9631             : void
    9632           7 : spdk_bdev_module_list_add(struct spdk_bdev_module *bdev_module)
    9633             : {
    9634             : 
    9635           7 :         if (spdk_bdev_module_list_find(bdev_module->name)) {
    9636           0 :                 SPDK_ERRLOG("ERROR: module '%s' already registered.\n", bdev_module->name);
    9637           0 :                 assert(false);
    9638             :         }
    9639             : 
    9640           7 :         spdk_spin_init(&bdev_module->internal.spinlock);
    9641           7 :         TAILQ_INIT(&bdev_module->internal.quiesced_ranges);
    9642             : 
    9643             :         /*
    9644             :          * Modules with examine callbacks must be initialized first, so they are
    9645             :          *  ready to handle examine callbacks from later modules that will
    9646             :          *  register physical bdevs.
    9647             :          */
    9648           7 :         if (bdev_module->examine_config != NULL || bdev_module->examine_disk != NULL) {
    9649           4 :                 TAILQ_INSERT_HEAD(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9650           4 :         } else {
    9651           3 :                 TAILQ_INSERT_TAIL(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9652             :         }
    9653           7 : }
    9654             : 
    9655             : struct spdk_bdev_module *
    9656           7 : spdk_bdev_module_list_find(const char *name)
    9657             : {
    9658             :         struct spdk_bdev_module *bdev_module;
    9659             : 
    9660          14 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    9661           7 :                 if (strcmp(name, bdev_module->name) == 0) {
    9662           0 :                         break;
    9663             :                 }
    9664           7 :         }
    9665             : 
    9666           7 :         return bdev_module;
    9667             : }
    9668             : 
    9669             : static int
    9670           6 : bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io)
    9671             : {
    9672             :         uint64_t num_blocks;
    9673           6 :         void *md_buf = NULL;
    9674             : 
    9675           6 :         num_blocks = bdev_io->u.bdev.num_blocks;
    9676             : 
    9677           6 :         if (spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9678           4 :                 md_buf = (char *)g_bdev_mgr.zero_buffer +
    9679           2 :                          spdk_bdev_get_block_size(bdev_io->bdev) * num_blocks;
    9680           2 :         }
    9681             : 
    9682          12 :         return bdev_write_blocks_with_md(bdev_io->internal.desc,
    9683           6 :                                          spdk_io_channel_from_ctx(bdev_io->internal.ch),
    9684           6 :                                          g_bdev_mgr.zero_buffer, md_buf,
    9685           6 :                                          bdev_io->u.bdev.offset_blocks, num_blocks,
    9686           6 :                                          bdev_write_zero_buffer_done, bdev_io);
    9687             : }
    9688             : 
    9689             : static void
    9690           6 : bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    9691             : {
    9692           6 :         struct spdk_bdev_io *parent_io = cb_arg;
    9693             : 
    9694           6 :         spdk_bdev_free_io(bdev_io);
    9695             : 
    9696           6 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
    9697           6 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
    9698           6 : }
    9699             : 
    9700             : static void
    9701          10 : bdev_set_qos_limit_done(struct set_qos_limit_ctx *ctx, int status)
    9702             : {
    9703          10 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9704          10 :         ctx->bdev->internal.qos_mod_in_progress = false;
    9705          10 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9706             : 
    9707          10 :         if (ctx->cb_fn) {
    9708           8 :                 ctx->cb_fn(ctx->cb_arg, status);
    9709           8 :         }
    9710          10 :         free(ctx);
    9711          10 : }
    9712             : 
    9713             : static void
    9714           2 : bdev_disable_qos_done(void *cb_arg)
    9715             : {
    9716           2 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9717           2 :         struct spdk_bdev *bdev = ctx->bdev;
    9718             :         struct spdk_bdev_qos *qos;
    9719             : 
    9720           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9721           2 :         qos = bdev->internal.qos;
    9722           2 :         bdev->internal.qos = NULL;
    9723           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9724             : 
    9725           2 :         if (qos->thread != NULL) {
    9726           2 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    9727           2 :                 spdk_poller_unregister(&qos->poller);
    9728           2 :         }
    9729             : 
    9730           2 :         free(qos);
    9731             : 
    9732           2 :         bdev_set_qos_limit_done(ctx, 0);
    9733           2 : }
    9734             : 
    9735             : static void
    9736           2 : bdev_disable_qos_msg_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9737             : {
    9738           2 :         struct set_qos_limit_ctx *ctx = _ctx;
    9739             :         struct spdk_thread *thread;
    9740             : 
    9741           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9742           2 :         thread = bdev->internal.qos->thread;
    9743           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9744             : 
    9745           2 :         if (thread != NULL) {
    9746           2 :                 spdk_thread_send_msg(thread, bdev_disable_qos_done, ctx);
    9747           2 :         } else {
    9748           0 :                 bdev_disable_qos_done(ctx);
    9749             :         }
    9750           2 : }
    9751             : 
    9752             : static void
    9753           4 : bdev_disable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9754             :                      struct spdk_io_channel *ch, void *_ctx)
    9755             : {
    9756           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9757             :         struct spdk_bdev_io *bdev_io;
    9758             : 
    9759           4 :         bdev_ch->flags &= ~BDEV_CH_QOS_ENABLED;
    9760             : 
    9761           6 :         while (!TAILQ_EMPTY(&bdev_ch->qos_queued_io)) {
    9762             :                 /* Re-submit the queued I/O. */
    9763           2 :                 bdev_io = TAILQ_FIRST(&bdev_ch->qos_queued_io);
    9764           2 :                 TAILQ_REMOVE(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    9765           2 :                 _bdev_io_submit(bdev_io);
    9766             :         }
    9767             : 
    9768           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    9769           4 : }
    9770             : 
    9771             : static void
    9772           1 : bdev_update_qos_rate_limit_msg(void *cb_arg)
    9773             : {
    9774           1 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9775           1 :         struct spdk_bdev *bdev = ctx->bdev;
    9776             : 
    9777           1 :         spdk_spin_lock(&bdev->internal.spinlock);
    9778           1 :         bdev_qos_update_max_quota_per_timeslice(bdev->internal.qos);
    9779           1 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9780             : 
    9781           1 :         bdev_set_qos_limit_done(ctx, 0);
    9782           1 : }
    9783             : 
    9784             : static void
    9785           9 : bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9786             :                     struct spdk_io_channel *ch, void *_ctx)
    9787             : {
    9788           9 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9789             : 
    9790           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9791           9 :         bdev_enable_qos(bdev, bdev_ch);
    9792           9 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9793           9 :         spdk_bdev_for_each_channel_continue(i, 0);
    9794           9 : }
    9795             : 
    9796             : static void
    9797           6 : bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9798             : {
    9799           6 :         struct set_qos_limit_ctx *ctx = _ctx;
    9800             : 
    9801           6 :         bdev_set_qos_limit_done(ctx, status);
    9802           6 : }
    9803             : 
    9804             : static void
    9805           7 : bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    9806             : {
    9807             :         int i;
    9808             : 
    9809           7 :         assert(bdev->internal.qos != NULL);
    9810             : 
    9811          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9812          28 :                 if (limits[i] != SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9813          28 :                         bdev->internal.qos->rate_limits[i].limit = limits[i];
    9814             : 
    9815          28 :                         if (limits[i] == 0) {
    9816          19 :                                 bdev->internal.qos->rate_limits[i].limit =
    9817             :                                         SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    9818          19 :                         }
    9819          28 :                 }
    9820          28 :         }
    9821           7 : }
    9822             : 
    9823             : void
    9824           9 : spdk_bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits,
    9825             :                               void (*cb_fn)(void *cb_arg, int status), void *cb_arg)
    9826             : {
    9827             :         struct set_qos_limit_ctx        *ctx;
    9828             :         uint32_t                        limit_set_complement;
    9829             :         uint64_t                        min_limit_per_sec;
    9830             :         int                             i;
    9831           9 :         bool                            disable_rate_limit = true;
    9832             : 
    9833          45 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9834          36 :                 if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9835           0 :                         continue;
    9836             :                 }
    9837             : 
    9838          36 :                 if (limits[i] > 0) {
    9839          10 :                         disable_rate_limit = false;
    9840          10 :                 }
    9841             : 
    9842          36 :                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    9843           9 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_IOS_PER_SEC;
    9844           9 :                 } else {
    9845          27 :                         if (limits[i] > SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC) {
    9846           0 :                                 SPDK_WARNLOG("Requested rate limit %" PRIu64 " will result in uint64_t overflow, "
    9847             :                                              "reset to %" PRIu64 "\n", limits[i], SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC);
    9848           0 :                                 limits[i] = SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC;
    9849           0 :                         }
    9850             :                         /* Change from megabyte to byte rate limit */
    9851          27 :                         limits[i] = limits[i] * 1024 * 1024;
    9852          27 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_BYTES_PER_SEC;
    9853             :                 }
    9854             : 
    9855          36 :                 limit_set_complement = limits[i] % min_limit_per_sec;
    9856          36 :                 if (limit_set_complement) {
    9857           0 :                         SPDK_ERRLOG("Requested rate limit %" PRIu64 " is not a multiple of %" PRIu64 "\n",
    9858             :                                     limits[i], min_limit_per_sec);
    9859           0 :                         limits[i] += min_limit_per_sec - limit_set_complement;
    9860           0 :                         SPDK_ERRLOG("Round up the rate limit to %" PRIu64 "\n", limits[i]);
    9861           0 :                 }
    9862          36 :         }
    9863             : 
    9864           9 :         ctx = calloc(1, sizeof(*ctx));
    9865           9 :         if (ctx == NULL) {
    9866           0 :                 cb_fn(cb_arg, -ENOMEM);
    9867           0 :                 return;
    9868             :         }
    9869             : 
    9870           9 :         ctx->cb_fn = cb_fn;
    9871           9 :         ctx->cb_arg = cb_arg;
    9872           9 :         ctx->bdev = bdev;
    9873             : 
    9874           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9875           9 :         if (bdev->internal.qos_mod_in_progress) {
    9876           1 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9877           1 :                 free(ctx);
    9878           1 :                 cb_fn(cb_arg, -EAGAIN);
    9879           1 :                 return;
    9880             :         }
    9881           8 :         bdev->internal.qos_mod_in_progress = true;
    9882             : 
    9883           8 :         if (disable_rate_limit == true && bdev->internal.qos) {
    9884          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9885           8 :                         if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED &&
    9886           0 :                             (bdev->internal.qos->rate_limits[i].limit > 0 &&
    9887           0 :                              bdev->internal.qos->rate_limits[i].limit !=
    9888             :                              SPDK_BDEV_QOS_LIMIT_NOT_DEFINED)) {
    9889           0 :                                 disable_rate_limit = false;
    9890           0 :                                 break;
    9891             :                         }
    9892           8 :                 }
    9893           2 :         }
    9894             : 
    9895           8 :         if (disable_rate_limit == false) {
    9896           5 :                 if (bdev->internal.qos == NULL) {
    9897           4 :                         bdev->internal.qos = calloc(1, sizeof(*bdev->internal.qos));
    9898           4 :                         if (!bdev->internal.qos) {
    9899           0 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
    9900           0 :                                 SPDK_ERRLOG("Unable to allocate memory for QoS tracking\n");
    9901           0 :                                 bdev_set_qos_limit_done(ctx, -ENOMEM);
    9902           0 :                                 return;
    9903             :                         }
    9904           4 :                 }
    9905             : 
    9906           5 :                 if (bdev->internal.qos->thread == NULL) {
    9907             :                         /* Enabling */
    9908           4 :                         bdev_set_qos_rate_limits(bdev, limits);
    9909             : 
    9910           4 :                         spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx,
    9911             :                                                    bdev_enable_qos_done);
    9912           4 :                 } else {
    9913             :                         /* Updating */
    9914           1 :                         bdev_set_qos_rate_limits(bdev, limits);
    9915             : 
    9916           2 :                         spdk_thread_send_msg(bdev->internal.qos->thread,
    9917           1 :                                              bdev_update_qos_rate_limit_msg, ctx);
    9918             :                 }
    9919           5 :         } else {
    9920           3 :                 if (bdev->internal.qos != NULL) {
    9921           2 :                         bdev_set_qos_rate_limits(bdev, limits);
    9922             : 
    9923             :                         /* Disabling */
    9924           2 :                         spdk_bdev_for_each_channel(bdev, bdev_disable_qos_msg, ctx,
    9925             :                                                    bdev_disable_qos_msg_done);
    9926           2 :                 } else {
    9927           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    9928           1 :                         bdev_set_qos_limit_done(ctx, 0);
    9929           1 :                         return;
    9930             :                 }
    9931             :         }
    9932             : 
    9933           7 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9934           9 : }
    9935             : 
    9936             : struct spdk_bdev_histogram_ctx {
    9937             :         spdk_bdev_histogram_status_cb cb_fn;
    9938             :         void *cb_arg;
    9939             :         struct spdk_bdev *bdev;
    9940             :         int status;
    9941             : };
    9942             : 
    9943             : static void
    9944           2 : bdev_histogram_disable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9945             : {
    9946           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9947             : 
    9948           2 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9949           2 :         ctx->bdev->internal.histogram_in_progress = false;
    9950           2 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9951           2 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
    9952           2 :         free(ctx);
    9953           2 : }
    9954             : 
    9955             : static void
    9956           3 : bdev_histogram_disable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9957             :                                struct spdk_io_channel *_ch, void *_ctx)
    9958             : {
    9959           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9960             : 
    9961           3 :         if (ch->histogram != NULL) {
    9962           3 :                 spdk_histogram_data_free(ch->histogram);
    9963           3 :                 ch->histogram = NULL;
    9964           3 :         }
    9965           3 :         spdk_bdev_for_each_channel_continue(i, 0);
    9966           3 : }
    9967             : 
    9968             : static void
    9969           2 : bdev_histogram_enable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9970             : {
    9971           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9972             : 
    9973           2 :         if (status != 0) {
    9974           0 :                 ctx->status = status;
    9975           0 :                 ctx->bdev->internal.histogram_enabled = false;
    9976           0 :                 spdk_bdev_for_each_channel(ctx->bdev, bdev_histogram_disable_channel, ctx,
    9977             :                                            bdev_histogram_disable_channel_cb);
    9978           0 :         } else {
    9979           2 :                 spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9980           2 :                 ctx->bdev->internal.histogram_in_progress = false;
    9981           2 :                 spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9982           2 :                 ctx->cb_fn(ctx->cb_arg, ctx->status);
    9983           2 :                 free(ctx);
    9984             :         }
    9985           2 : }
    9986             : 
    9987             : static void
    9988           3 : bdev_histogram_enable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9989             :                               struct spdk_io_channel *_ch, void *_ctx)
    9990             : {
    9991           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9992           3 :         int status = 0;
    9993             : 
    9994           3 :         if (ch->histogram == NULL) {
    9995           3 :                 ch->histogram = spdk_histogram_data_alloc();
    9996           3 :                 if (ch->histogram == NULL) {
    9997           0 :                         status = -ENOMEM;
    9998           0 :                 }
    9999           3 :         }
   10000             : 
   10001           3 :         spdk_bdev_for_each_channel_continue(i, status);
   10002           3 : }
   10003             : 
   10004             : void
   10005           4 : spdk_bdev_histogram_enable_ext(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
   10006             :                                void *cb_arg, bool enable, struct spdk_bdev_enable_histogram_opts *opts)
   10007             : {
   10008             :         struct spdk_bdev_histogram_ctx *ctx;
   10009             : 
   10010           4 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_ctx));
   10011           4 :         if (ctx == NULL) {
   10012           0 :                 cb_fn(cb_arg, -ENOMEM);
   10013           0 :                 return;
   10014             :         }
   10015             : 
   10016           4 :         ctx->bdev = bdev;
   10017           4 :         ctx->status = 0;
   10018           4 :         ctx->cb_fn = cb_fn;
   10019           4 :         ctx->cb_arg = cb_arg;
   10020             : 
   10021           4 :         spdk_spin_lock(&bdev->internal.spinlock);
   10022           4 :         if (bdev->internal.histogram_in_progress) {
   10023           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
   10024           0 :                 free(ctx);
   10025           0 :                 cb_fn(cb_arg, -EAGAIN);
   10026           0 :                 return;
   10027             :         }
   10028             : 
   10029           4 :         bdev->internal.histogram_in_progress = true;
   10030           4 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10031             : 
   10032           4 :         bdev->internal.histogram_enabled = enable;
   10033           4 :         bdev->internal.histogram_io_type = opts->io_type;
   10034             : 
   10035           4 :         if (enable) {
   10036             :                 /* Allocate histogram for each channel */
   10037           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_enable_channel, ctx,
   10038             :                                            bdev_histogram_enable_channel_cb);
   10039           2 :         } else {
   10040           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_disable_channel, ctx,
   10041             :                                            bdev_histogram_disable_channel_cb);
   10042             :         }
   10043           4 : }
   10044             : 
   10045             : void
   10046           4 : spdk_bdev_enable_histogram_opts_init(struct spdk_bdev_enable_histogram_opts *opts, size_t size)
   10047             : {
   10048           4 :         if (opts == NULL) {
   10049           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
   10050           0 :                 assert(opts != NULL);
   10051           0 :                 return;
   10052             :         }
   10053           4 :         if (size == 0) {
   10054           0 :                 SPDK_ERRLOG("size should not be zero\n");
   10055           0 :                 assert(size != 0);
   10056           0 :                 return;
   10057             :         }
   10058             : 
   10059           4 :         memset(opts, 0, size);
   10060           4 :         opts->size = size;
   10061             : 
   10062             : #define FIELD_OK(field) \
   10063             :         offsetof(struct spdk_bdev_enable_histogram_opts, field) + sizeof(opts->field) <= size
   10064             : 
   10065             : #define SET_FIELD(field, value) \
   10066             :         if (FIELD_OK(field)) { \
   10067             :                 opts->field = value; \
   10068             :         } \
   10069             : 
   10070           4 :         SET_FIELD(io_type, 0);
   10071             : 
   10072             :         /* You should not remove this statement, but need to update the assert statement
   10073             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
   10074             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_enable_histogram_opts) == 9, "Incorrect size");
   10075             : 
   10076             : #undef FIELD_OK
   10077             : #undef SET_FIELD
   10078           4 : }
   10079             : 
   10080             : void
   10081           4 : spdk_bdev_histogram_enable(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
   10082             :                            void *cb_arg, bool enable)
   10083             : {
   10084             :         struct spdk_bdev_enable_histogram_opts opts;
   10085             : 
   10086           4 :         spdk_bdev_enable_histogram_opts_init(&opts, sizeof(opts));
   10087           4 :         spdk_bdev_histogram_enable_ext(bdev, cb_fn, cb_arg, enable, &opts);
   10088           4 : }
   10089             : 
   10090             : struct spdk_bdev_histogram_data_ctx {
   10091             :         spdk_bdev_histogram_data_cb cb_fn;
   10092             :         void *cb_arg;
   10093             :         struct spdk_bdev *bdev;
   10094             :         /** merged histogram data from all channels */
   10095             :         struct spdk_histogram_data      *histogram;
   10096             : };
   10097             : 
   10098             : static void
   10099           5 : bdev_histogram_get_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10100             : {
   10101           5 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
   10102             : 
   10103           5 :         ctx->cb_fn(ctx->cb_arg, status, ctx->histogram);
   10104           5 :         free(ctx);
   10105           5 : }
   10106             : 
   10107             : static void
   10108           7 : bdev_histogram_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10109             :                            struct spdk_io_channel *_ch, void *_ctx)
   10110             : {
   10111           7 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10112           7 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
   10113           7 :         int status = 0;
   10114             : 
   10115           7 :         if (ch->histogram == NULL) {
   10116           1 :                 status = -EFAULT;
   10117           1 :         } else {
   10118           6 :                 spdk_histogram_data_merge(ctx->histogram, ch->histogram);
   10119             :         }
   10120             : 
   10121           7 :         spdk_bdev_for_each_channel_continue(i, status);
   10122           7 : }
   10123             : 
   10124             : void
   10125           5 : spdk_bdev_histogram_get(struct spdk_bdev *bdev, struct spdk_histogram_data *histogram,
   10126             :                         spdk_bdev_histogram_data_cb cb_fn,
   10127             :                         void *cb_arg)
   10128             : {
   10129             :         struct spdk_bdev_histogram_data_ctx *ctx;
   10130             : 
   10131           5 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_data_ctx));
   10132           5 :         if (ctx == NULL) {
   10133           0 :                 cb_fn(cb_arg, -ENOMEM, NULL);
   10134           0 :                 return;
   10135             :         }
   10136             : 
   10137           5 :         ctx->bdev = bdev;
   10138           5 :         ctx->cb_fn = cb_fn;
   10139           5 :         ctx->cb_arg = cb_arg;
   10140             : 
   10141           5 :         ctx->histogram = histogram;
   10142             : 
   10143           5 :         spdk_bdev_for_each_channel(bdev, bdev_histogram_get_channel, ctx,
   10144             :                                    bdev_histogram_get_channel_cb);
   10145           5 : }
   10146             : 
   10147             : void
   10148           2 : spdk_bdev_channel_get_histogram(struct spdk_io_channel *ch, spdk_bdev_histogram_data_cb cb_fn,
   10149             :                                 void *cb_arg)
   10150             : {
   10151           2 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
   10152           2 :         int status = 0;
   10153             : 
   10154           2 :         assert(cb_fn != NULL);
   10155             : 
   10156           2 :         if (bdev_ch->histogram == NULL) {
   10157           1 :                 status = -EFAULT;
   10158           1 :         }
   10159           2 :         cb_fn(cb_arg, status, bdev_ch->histogram);
   10160           2 : }
   10161             : 
   10162             : size_t
   10163           0 : spdk_bdev_get_media_events(struct spdk_bdev_desc *desc, struct spdk_bdev_media_event *events,
   10164             :                            size_t max_events)
   10165             : {
   10166             :         struct media_event_entry *entry;
   10167           0 :         size_t num_events = 0;
   10168             : 
   10169           0 :         for (; num_events < max_events; ++num_events) {
   10170           0 :                 entry = TAILQ_FIRST(&desc->pending_media_events);
   10171           0 :                 if (entry == NULL) {
   10172           0 :                         break;
   10173             :                 }
   10174             : 
   10175           0 :                 events[num_events] = entry->event;
   10176           0 :                 TAILQ_REMOVE(&desc->pending_media_events, entry, tailq);
   10177           0 :                 TAILQ_INSERT_TAIL(&desc->free_media_events, entry, tailq);
   10178           0 :         }
   10179             : 
   10180           0 :         return num_events;
   10181             : }
   10182             : 
   10183             : int
   10184           0 : spdk_bdev_push_media_events(struct spdk_bdev *bdev, const struct spdk_bdev_media_event *events,
   10185             :                             size_t num_events)
   10186             : {
   10187             :         struct spdk_bdev_desc *desc;
   10188             :         struct media_event_entry *entry;
   10189             :         size_t event_id;
   10190           0 :         int rc = 0;
   10191             : 
   10192           0 :         assert(bdev->media_events);
   10193             : 
   10194           0 :         spdk_spin_lock(&bdev->internal.spinlock);
   10195           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
   10196           0 :                 if (desc->write) {
   10197           0 :                         break;
   10198             :                 }
   10199           0 :         }
   10200             : 
   10201           0 :         if (desc == NULL || desc->media_events_buffer == NULL) {
   10202           0 :                 rc = -ENODEV;
   10203           0 :                 goto out;
   10204             :         }
   10205             : 
   10206           0 :         for (event_id = 0; event_id < num_events; ++event_id) {
   10207           0 :                 entry = TAILQ_FIRST(&desc->free_media_events);
   10208           0 :                 if (entry == NULL) {
   10209           0 :                         break;
   10210             :                 }
   10211             : 
   10212           0 :                 TAILQ_REMOVE(&desc->free_media_events, entry, tailq);
   10213           0 :                 TAILQ_INSERT_TAIL(&desc->pending_media_events, entry, tailq);
   10214           0 :                 entry->event = events[event_id];
   10215           0 :         }
   10216             : 
   10217           0 :         rc = event_id;
   10218             : out:
   10219           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10220           0 :         return rc;
   10221             : }
   10222             : 
   10223             : static void
   10224           0 : _media_management_notify(void *arg)
   10225             : {
   10226           0 :         struct spdk_bdev_desc *desc = arg;
   10227             : 
   10228           0 :         _event_notify(desc, SPDK_BDEV_EVENT_MEDIA_MANAGEMENT);
   10229           0 : }
   10230             : 
   10231             : void
   10232           0 : spdk_bdev_notify_media_management(struct spdk_bdev *bdev)
   10233             : {
   10234             :         struct spdk_bdev_desc *desc;
   10235             : 
   10236           0 :         spdk_spin_lock(&bdev->internal.spinlock);
   10237           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
   10238           0 :                 if (!TAILQ_EMPTY(&desc->pending_media_events)) {
   10239           0 :                         event_notify(desc, _media_management_notify);
   10240           0 :                 }
   10241           0 :         }
   10242           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10243           0 : }
   10244             : 
   10245             : struct locked_lba_range_ctx {
   10246             :         struct lba_range                range;
   10247             :         struct lba_range                *current_range;
   10248             :         struct lba_range                *owner_range;
   10249             :         struct spdk_poller              *poller;
   10250             :         lock_range_cb                   cb_fn;
   10251             :         void                            *cb_arg;
   10252             : };
   10253             : 
   10254             : static void
   10255           0 : bdev_lock_error_cleanup_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10256             : {
   10257           0 :         struct locked_lba_range_ctx *ctx = _ctx;
   10258             : 
   10259           0 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, -ENOMEM);
   10260           0 :         free(ctx);
   10261           0 : }
   10262             : 
   10263             : static void bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i,
   10264             :                 struct spdk_bdev *bdev, struct spdk_io_channel *ch, void *_ctx);
   10265             : 
   10266             : static void
   10267          14 : bdev_lock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10268             : {
   10269          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10270             : 
   10271          14 :         if (status == -ENOMEM) {
   10272             :                 /* One of the channels could not allocate a range object.
   10273             :                  * So we have to go back and clean up any ranges that were
   10274             :                  * allocated successfully before we return error status to
   10275             :                  * the caller.  We can reuse the unlock function to do that
   10276             :                  * clean up.
   10277             :                  */
   10278           0 :                 spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10279             :                                            bdev_lock_error_cleanup_cb);
   10280           0 :                 return;
   10281             :         }
   10282             : 
   10283             :         /* All channels have locked this range and no I/O overlapping the range
   10284             :          * are outstanding!  Set the owner_ch for the range object for the
   10285             :          * locking channel, so that this channel will know that it is allowed
   10286             :          * to write to this range.
   10287             :          */
   10288          14 :         if (ctx->owner_range != NULL) {
   10289          10 :                 ctx->owner_range->owner_ch = ctx->range.owner_ch;
   10290          10 :         }
   10291             : 
   10292          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10293             : 
   10294             :         /* Don't free the ctx here.  Its range is in the bdev's global list of
   10295             :          * locked ranges still, and will be removed and freed when this range
   10296             :          * is later unlocked.
   10297             :          */
   10298          14 : }
   10299             : 
   10300             : static int
   10301          17 : bdev_lock_lba_range_check_io(void *_i)
   10302             : {
   10303          17 :         struct spdk_bdev_channel_iter *i = _i;
   10304          17 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i->i);
   10305          17 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10306          17 :         struct locked_lba_range_ctx *ctx = i->ctx;
   10307          17 :         struct lba_range *range = ctx->current_range;
   10308             :         struct spdk_bdev_io *bdev_io;
   10309             : 
   10310          17 :         spdk_poller_unregister(&ctx->poller);
   10311             : 
   10312             :         /* The range is now in the locked_ranges, so no new IO can be submitted to this
   10313             :          * range.  But we need to wait until any outstanding IO overlapping with this range
   10314             :          * are completed.
   10315             :          */
   10316          18 :         TAILQ_FOREACH(bdev_io, &ch->io_submitted, internal.ch_link) {
   10317           3 :                 if (bdev_io_range_is_locked(bdev_io, range)) {
   10318           2 :                         ctx->poller = SPDK_POLLER_REGISTER(bdev_lock_lba_range_check_io, i, 100);
   10319           2 :                         return SPDK_POLLER_BUSY;
   10320             :                 }
   10321           1 :         }
   10322             : 
   10323          15 :         spdk_bdev_for_each_channel_continue(i, 0);
   10324          15 :         return SPDK_POLLER_BUSY;
   10325          17 : }
   10326             : 
   10327             : static void
   10328          15 : bdev_lock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10329             :                                 struct spdk_io_channel *_ch, void *_ctx)
   10330             : {
   10331          15 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10332          15 :         struct locked_lba_range_ctx *ctx = _ctx;
   10333             :         struct lba_range *range;
   10334             : 
   10335          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10336           1 :                 if (range->length == ctx->range.length &&
   10337           0 :                     range->offset == ctx->range.offset &&
   10338           0 :                     range->locked_ctx == ctx->range.locked_ctx) {
   10339             :                         /* This range already exists on this channel, so don't add
   10340             :                          * it again.  This can happen when a new channel is created
   10341             :                          * while the for_each_channel operation is in progress.
   10342             :                          * Do not check for outstanding I/O in that case, since the
   10343             :                          * range was locked before any I/O could be submitted to the
   10344             :                          * new channel.
   10345             :                          */
   10346           0 :                         spdk_bdev_for_each_channel_continue(i, 0);
   10347           0 :                         return;
   10348             :                 }
   10349           1 :         }
   10350             : 
   10351          15 :         range = calloc(1, sizeof(*range));
   10352          15 :         if (range == NULL) {
   10353           0 :                 spdk_bdev_for_each_channel_continue(i, -ENOMEM);
   10354           0 :                 return;
   10355             :         }
   10356             : 
   10357          15 :         range->length = ctx->range.length;
   10358          15 :         range->offset = ctx->range.offset;
   10359          15 :         range->locked_ctx = ctx->range.locked_ctx;
   10360          15 :         range->quiesce = ctx->range.quiesce;
   10361          15 :         ctx->current_range = range;
   10362          15 :         if (ctx->range.owner_ch == ch) {
   10363             :                 /* This is the range object for the channel that will hold
   10364             :                  * the lock.  Store it in the ctx object so that we can easily
   10365             :                  * set its owner_ch after the lock is finally acquired.
   10366             :                  */
   10367          10 :                 ctx->owner_range = range;
   10368          10 :         }
   10369          15 :         TAILQ_INSERT_TAIL(&ch->locked_ranges, range, tailq);
   10370          15 :         bdev_lock_lba_range_check_io(i);
   10371          15 : }
   10372             : 
   10373             : static void
   10374          14 : bdev_lock_lba_range_ctx(struct spdk_bdev *bdev, struct locked_lba_range_ctx *ctx)
   10375             : {
   10376          14 :         assert(spdk_get_thread() == ctx->range.owner_thread);
   10377          14 :         assert(ctx->range.owner_ch == NULL ||
   10378             :                spdk_io_channel_get_thread(ctx->range.owner_ch->channel) == ctx->range.owner_thread);
   10379             : 
   10380             :         /* We will add a copy of this range to each channel now. */
   10381          14 :         spdk_bdev_for_each_channel(bdev, bdev_lock_lba_range_get_channel, ctx,
   10382             :                                    bdev_lock_lba_range_cb);
   10383          14 : }
   10384             : 
   10385             : static bool
   10386          17 : bdev_lba_range_overlaps_tailq(struct lba_range *range, lba_range_tailq_t *tailq)
   10387             : {
   10388             :         struct lba_range *r;
   10389             : 
   10390          18 :         TAILQ_FOREACH(r, tailq, tailq) {
   10391           4 :                 if (bdev_lba_range_overlapped(range, r)) {
   10392           3 :                         return true;
   10393             :                 }
   10394           1 :         }
   10395          14 :         return false;
   10396          17 : }
   10397             : 
   10398             : static void bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status);
   10399             : 
   10400             : static int
   10401          14 : _bdev_lock_lba_range(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch,
   10402             :                      uint64_t offset, uint64_t length,
   10403             :                      lock_range_cb cb_fn, void *cb_arg)
   10404             : {
   10405             :         struct locked_lba_range_ctx *ctx;
   10406             : 
   10407          14 :         ctx = calloc(1, sizeof(*ctx));
   10408          14 :         if (ctx == NULL) {
   10409           0 :                 return -ENOMEM;
   10410             :         }
   10411             : 
   10412          14 :         ctx->range.offset = offset;
   10413          14 :         ctx->range.length = length;
   10414          14 :         ctx->range.owner_thread = spdk_get_thread();
   10415          14 :         ctx->range.owner_ch = ch;
   10416          14 :         ctx->range.locked_ctx = cb_arg;
   10417          14 :         ctx->range.bdev = bdev;
   10418          14 :         ctx->range.quiesce = (cb_fn == bdev_quiesce_range_locked);
   10419          14 :         ctx->cb_fn = cb_fn;
   10420          14 :         ctx->cb_arg = cb_arg;
   10421             : 
   10422          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10423          14 :         if (bdev_lba_range_overlaps_tailq(&ctx->range, &bdev->internal.locked_ranges)) {
   10424             :                 /* There is an active lock overlapping with this range.
   10425             :                  * Put it on the pending list until this range no
   10426             :                  * longer overlaps with another.
   10427             :                  */
   10428           2 :                 TAILQ_INSERT_TAIL(&bdev->internal.pending_locked_ranges, &ctx->range, tailq);
   10429           2 :         } else {
   10430          12 :                 TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, &ctx->range, tailq);
   10431          12 :                 bdev_lock_lba_range_ctx(bdev, ctx);
   10432             :         }
   10433          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10434          14 :         return 0;
   10435          14 : }
   10436             : 
   10437             : static int
   10438          10 : bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10439             :                     uint64_t offset, uint64_t length,
   10440             :                     lock_range_cb cb_fn, void *cb_arg)
   10441             : {
   10442          10 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10443          10 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10444             : 
   10445          10 :         if (cb_arg == NULL) {
   10446           0 :                 SPDK_ERRLOG("cb_arg must not be NULL\n");
   10447           0 :                 return -EINVAL;
   10448             :         }
   10449             : 
   10450          10 :         return _bdev_lock_lba_range(bdev, ch, offset, length, cb_fn, cb_arg);
   10451          10 : }
   10452             : 
   10453             : static void
   10454           2 : bdev_lock_lba_range_ctx_msg(void *_ctx)
   10455             : {
   10456           2 :         struct locked_lba_range_ctx *ctx = _ctx;
   10457             : 
   10458           2 :         bdev_lock_lba_range_ctx(ctx->range.bdev, ctx);
   10459           2 : }
   10460             : 
   10461             : static void
   10462          14 : bdev_unlock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10463             : {
   10464          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10465             :         struct locked_lba_range_ctx *pending_ctx;
   10466             :         struct lba_range *range, *tmp;
   10467             : 
   10468          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10469             :         /* Check if there are any pending locked ranges that overlap with this range
   10470             :          * that was just unlocked.  If there are, check that it doesn't overlap with any
   10471             :          * other locked ranges before calling bdev_lock_lba_range_ctx which will start
   10472             :          * the lock process.
   10473             :          */
   10474          17 :         TAILQ_FOREACH_SAFE(range, &bdev->internal.pending_locked_ranges, tailq, tmp) {
   10475           3 :                 if (bdev_lba_range_overlapped(range, &ctx->range) &&
   10476           3 :                     !bdev_lba_range_overlaps_tailq(range, &bdev->internal.locked_ranges)) {
   10477           2 :                         TAILQ_REMOVE(&bdev->internal.pending_locked_ranges, range, tailq);
   10478           2 :                         pending_ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10479           2 :                         TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, range, tailq);
   10480           4 :                         spdk_thread_send_msg(pending_ctx->range.owner_thread,
   10481           2 :                                              bdev_lock_lba_range_ctx_msg, pending_ctx);
   10482           2 :                 }
   10483           3 :         }
   10484          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10485             : 
   10486          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10487          14 :         free(ctx);
   10488          14 : }
   10489             : 
   10490             : static void
   10491          16 : bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10492             :                                   struct spdk_io_channel *_ch, void *_ctx)
   10493             : {
   10494          16 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10495          16 :         struct locked_lba_range_ctx *ctx = _ctx;
   10496             :         TAILQ_HEAD(, spdk_bdev_io) io_locked;
   10497             :         struct spdk_bdev_io *bdev_io;
   10498             :         struct lba_range *range;
   10499             : 
   10500          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10501          32 :                 if (ctx->range.offset == range->offset &&
   10502          16 :                     ctx->range.length == range->length &&
   10503          16 :                     ctx->range.locked_ctx == range->locked_ctx) {
   10504          16 :                         TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
   10505          16 :                         free(range);
   10506          16 :                         break;
   10507             :                 }
   10508           0 :         }
   10509             : 
   10510             :         /* Note: we should almost always be able to assert that the range specified
   10511             :          * was found.  But there are some very rare corner cases where a new channel
   10512             :          * gets created simultaneously with a range unlock, where this function
   10513             :          * would execute on that new channel and wouldn't have the range.
   10514             :          * We also use this to clean up range allocations when a later allocation
   10515             :          * fails in the locking path.
   10516             :          * So we can't actually assert() here.
   10517             :          */
   10518             : 
   10519             :         /* Swap the locked IO into a temporary list, and then try to submit them again.
   10520             :          * We could hyper-optimize this to only resubmit locked I/O that overlap
   10521             :          * with the range that was just unlocked, but this isn't a performance path so
   10522             :          * we go for simplicity here.
   10523             :          */
   10524          16 :         TAILQ_INIT(&io_locked);
   10525          16 :         TAILQ_SWAP(&ch->io_locked, &io_locked, spdk_bdev_io, internal.ch_link);
   10526          19 :         while (!TAILQ_EMPTY(&io_locked)) {
   10527           3 :                 bdev_io = TAILQ_FIRST(&io_locked);
   10528           3 :                 TAILQ_REMOVE(&io_locked, bdev_io, internal.ch_link);
   10529           3 :                 bdev_io_submit(bdev_io);
   10530             :         }
   10531             : 
   10532          16 :         spdk_bdev_for_each_channel_continue(i, 0);
   10533          16 : }
   10534             : 
   10535             : static int
   10536          14 : _bdev_unlock_lba_range(struct spdk_bdev *bdev, uint64_t offset, uint64_t length,
   10537             :                        lock_range_cb cb_fn, void *cb_arg)
   10538             : {
   10539             :         struct locked_lba_range_ctx *ctx;
   10540             :         struct lba_range *range;
   10541             : 
   10542          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10543             :         /* To start the unlock the process, we find the range in the bdev's locked_ranges
   10544             :          * and remove it. This ensures new channels don't inherit the locked range.
   10545             :          * Then we will send a message to each channel to remove the range from its
   10546             :          * per-channel list.
   10547             :          */
   10548          14 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
   10549          24 :                 if (range->offset == offset && range->length == length &&
   10550          14 :                     (range->owner_ch == NULL || range->locked_ctx == cb_arg)) {
   10551          14 :                         break;
   10552             :                 }
   10553           0 :         }
   10554          14 :         if (range == NULL) {
   10555           0 :                 assert(false);
   10556             :                 spdk_spin_unlock(&bdev->internal.spinlock);
   10557             :                 return -EINVAL;
   10558             :         }
   10559          14 :         TAILQ_REMOVE(&bdev->internal.locked_ranges, range, tailq);
   10560          14 :         ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10561          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10562             : 
   10563          14 :         ctx->cb_fn = cb_fn;
   10564          14 :         ctx->cb_arg = cb_arg;
   10565             : 
   10566          14 :         spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10567             :                                    bdev_unlock_lba_range_cb);
   10568          14 :         return 0;
   10569             : }
   10570             : 
   10571             : static int
   10572          12 : bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10573             :                       uint64_t offset, uint64_t length,
   10574             :                       lock_range_cb cb_fn, void *cb_arg)
   10575             : {
   10576          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10577          12 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10578             :         struct lba_range *range;
   10579          12 :         bool range_found = false;
   10580             : 
   10581             :         /* Let's make sure the specified channel actually has a lock on
   10582             :          * the specified range.  Note that the range must match exactly.
   10583             :          */
   10584          14 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10585          22 :                 if (range->offset == offset && range->length == length &&
   10586          11 :                     range->owner_ch == ch && range->locked_ctx == cb_arg) {
   10587          10 :                         range_found = true;
   10588          10 :                         break;
   10589             :                 }
   10590           2 :         }
   10591             : 
   10592          12 :         if (!range_found) {
   10593           2 :                 return -EINVAL;
   10594             :         }
   10595             : 
   10596          10 :         return _bdev_unlock_lba_range(bdev, offset, length, cb_fn, cb_arg);
   10597          12 : }
   10598             : 
   10599             : struct bdev_quiesce_ctx {
   10600             :         spdk_bdev_quiesce_cb cb_fn;
   10601             :         void *cb_arg;
   10602             : };
   10603             : 
   10604             : static void
   10605           4 : bdev_unquiesce_range_unlocked(struct lba_range *range, void *ctx, int status)
   10606             : {
   10607           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10608             : 
   10609           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10610           4 :                 quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10611           4 :         }
   10612             : 
   10613           4 :         free(quiesce_ctx);
   10614           4 : }
   10615             : 
   10616             : static void
   10617           4 : bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status)
   10618             : {
   10619           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10620           4 :         struct spdk_bdev_module *module = range->bdev->module;
   10621             : 
   10622           4 :         if (status != 0) {
   10623           0 :                 if (quiesce_ctx->cb_fn != NULL) {
   10624           0 :                         quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10625           0 :                 }
   10626           0 :                 free(quiesce_ctx);
   10627           0 :                 return;
   10628             :         }
   10629             : 
   10630           4 :         spdk_spin_lock(&module->internal.spinlock);
   10631           4 :         TAILQ_INSERT_TAIL(&module->internal.quiesced_ranges, range, tailq_module);
   10632           4 :         spdk_spin_unlock(&module->internal.spinlock);
   10633             : 
   10634           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10635             :                 /* copy the context in case the range is unlocked by the callback */
   10636           4 :                 struct bdev_quiesce_ctx tmp = *quiesce_ctx;
   10637             : 
   10638           4 :                 quiesce_ctx->cb_fn = NULL;
   10639           4 :                 quiesce_ctx->cb_arg = NULL;
   10640             : 
   10641           4 :                 tmp.cb_fn(tmp.cb_arg, status);
   10642           4 :         }
   10643             :         /* quiesce_ctx will be freed on unquiesce */
   10644           4 : }
   10645             : 
   10646             : static int
   10647           9 : _spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10648             :                    uint64_t offset, uint64_t length,
   10649             :                    spdk_bdev_quiesce_cb cb_fn, void *cb_arg,
   10650             :                    bool unquiesce)
   10651             : {
   10652             :         struct bdev_quiesce_ctx *quiesce_ctx;
   10653             :         int rc;
   10654             : 
   10655           9 :         if (module != bdev->module) {
   10656           0 :                 SPDK_ERRLOG("Bdev does not belong to specified module.\n");
   10657           0 :                 return -EINVAL;
   10658             :         }
   10659             : 
   10660           9 :         if (!bdev_io_valid_blocks(bdev, offset, length)) {
   10661           0 :                 return -EINVAL;
   10662             :         }
   10663             : 
   10664           9 :         if (unquiesce) {
   10665             :                 struct lba_range *range;
   10666             : 
   10667             :                 /* Make sure the specified range is actually quiesced in the specified module and
   10668             :                  * then remove it from the list. Note that the range must match exactly.
   10669             :                  */
   10670           5 :                 spdk_spin_lock(&module->internal.spinlock);
   10671           6 :                 TAILQ_FOREACH(range, &module->internal.quiesced_ranges, tailq_module) {
   10672           5 :                         if (range->bdev == bdev && range->offset == offset && range->length == length) {
   10673           4 :                                 TAILQ_REMOVE(&module->internal.quiesced_ranges, range, tailq_module);
   10674           4 :                                 break;
   10675             :                         }
   10676           1 :                 }
   10677           5 :                 spdk_spin_unlock(&module->internal.spinlock);
   10678             : 
   10679           5 :                 if (range == NULL) {
   10680           1 :                         SPDK_ERRLOG("The range to unquiesce was not found.\n");
   10681           1 :                         return -EINVAL;
   10682             :                 }
   10683             : 
   10684           4 :                 quiesce_ctx = range->locked_ctx;
   10685           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10686           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10687             : 
   10688           4 :                 rc = _bdev_unlock_lba_range(bdev, offset, length, bdev_unquiesce_range_unlocked, quiesce_ctx);
   10689           4 :         } else {
   10690           4 :                 quiesce_ctx = malloc(sizeof(*quiesce_ctx));
   10691           4 :                 if (quiesce_ctx == NULL) {
   10692           0 :                         return -ENOMEM;
   10693             :                 }
   10694             : 
   10695           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10696           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10697             : 
   10698           4 :                 rc = _bdev_lock_lba_range(bdev, NULL, offset, length, bdev_quiesce_range_locked, quiesce_ctx);
   10699           4 :                 if (rc != 0) {
   10700           0 :                         free(quiesce_ctx);
   10701           0 :                 }
   10702             :         }
   10703             : 
   10704           8 :         return rc;
   10705           9 : }
   10706             : 
   10707             : int
   10708           3 : spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10709             :                   spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10710             : {
   10711           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, false);
   10712             : }
   10713             : 
   10714             : int
   10715           3 : spdk_bdev_unquiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10716             :                     spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10717             : {
   10718           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, true);
   10719             : }
   10720             : 
   10721             : int
   10722           1 : spdk_bdev_quiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10723             :                         uint64_t offset, uint64_t length,
   10724             :                         spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10725             : {
   10726           1 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, false);
   10727             : }
   10728             : 
   10729             : int
   10730           2 : spdk_bdev_unquiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10731             :                           uint64_t offset, uint64_t length,
   10732             :                           spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10733             : {
   10734           2 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, true);
   10735             : }
   10736             : 
   10737             : int
   10738         283 : spdk_bdev_get_memory_domains(struct spdk_bdev *bdev, struct spdk_memory_domain **domains,
   10739             :                              int array_size)
   10740             : {
   10741         283 :         if (!bdev) {
   10742           1 :                 return -EINVAL;
   10743             :         }
   10744             : 
   10745         282 :         if (bdev->fn_table->get_memory_domains) {
   10746           3 :                 return bdev->fn_table->get_memory_domains(bdev->ctxt, domains, array_size);
   10747             :         }
   10748             : 
   10749         279 :         return 0;
   10750         283 : }
   10751             : 
   10752             : struct spdk_bdev_for_each_io_ctx {
   10753             :         void *ctx;
   10754             :         spdk_bdev_io_fn fn;
   10755             :         spdk_bdev_for_each_io_cb cb;
   10756             : };
   10757             : 
   10758             : static void
   10759           0 : bdev_channel_for_each_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10760             :                          struct spdk_io_channel *io_ch, void *_ctx)
   10761             : {
   10762           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10763           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
   10764             :         struct spdk_bdev_io *bdev_io;
   10765           0 :         int rc = 0;
   10766             : 
   10767           0 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
   10768           0 :                 rc = ctx->fn(ctx->ctx, bdev_io);
   10769           0 :                 if (rc != 0) {
   10770           0 :                         break;
   10771             :                 }
   10772           0 :         }
   10773             : 
   10774           0 :         spdk_bdev_for_each_channel_continue(i, rc);
   10775           0 : }
   10776             : 
   10777             : static void
   10778           0 : bdev_for_each_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
   10779             : {
   10780           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10781             : 
   10782           0 :         ctx->cb(ctx->ctx, status);
   10783             : 
   10784           0 :         free(ctx);
   10785           0 : }
   10786             : 
   10787             : void
   10788           0 : spdk_bdev_for_each_bdev_io(struct spdk_bdev *bdev, void *_ctx, spdk_bdev_io_fn fn,
   10789             :                            spdk_bdev_for_each_io_cb cb)
   10790             : {
   10791             :         struct spdk_bdev_for_each_io_ctx *ctx;
   10792             : 
   10793           0 :         assert(fn != NULL && cb != NULL);
   10794             : 
   10795           0 :         ctx = calloc(1, sizeof(*ctx));
   10796           0 :         if (ctx == NULL) {
   10797           0 :                 SPDK_ERRLOG("Failed to allocate context.\n");
   10798           0 :                 cb(_ctx, -ENOMEM);
   10799           0 :                 return;
   10800             :         }
   10801             : 
   10802           0 :         ctx->ctx = _ctx;
   10803           0 :         ctx->fn = fn;
   10804           0 :         ctx->cb = cb;
   10805             : 
   10806           0 :         spdk_bdev_for_each_channel(bdev, bdev_channel_for_each_io, ctx,
   10807             :                                    bdev_for_each_io_done);
   10808           0 : }
   10809             : 
   10810             : void
   10811         135 : spdk_bdev_for_each_channel_continue(struct spdk_bdev_channel_iter *iter, int status)
   10812             : {
   10813         135 :         spdk_for_each_channel_continue(iter->i, status);
   10814         135 : }
   10815             : 
   10816             : static struct spdk_bdev *
   10817         371 : io_channel_iter_get_bdev(struct spdk_io_channel_iter *i)
   10818             : {
   10819         371 :         void *io_device = spdk_io_channel_iter_get_io_device(i);
   10820             : 
   10821         371 :         return __bdev_from_io_dev(io_device);
   10822             : }
   10823             : 
   10824             : static void
   10825         135 : bdev_each_channel_msg(struct spdk_io_channel_iter *i)
   10826             : {
   10827         135 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10828         135 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10829         135 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
   10830             : 
   10831         135 :         iter->i = i;
   10832         135 :         iter->fn(iter, bdev, ch, iter->ctx);
   10833         135 : }
   10834             : 
   10835             : static void
   10836         236 : bdev_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
   10837             : {
   10838         236 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10839         236 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10840             : 
   10841         236 :         iter->i = i;
   10842         236 :         iter->cpl(bdev, iter->ctx, status);
   10843             : 
   10844         236 :         free(iter);
   10845         236 : }
   10846             : 
   10847             : void
   10848         236 : spdk_bdev_for_each_channel(struct spdk_bdev *bdev, spdk_bdev_for_each_channel_msg fn,
   10849             :                            void *ctx, spdk_bdev_for_each_channel_done cpl)
   10850             : {
   10851             :         struct spdk_bdev_channel_iter *iter;
   10852             : 
   10853         236 :         assert(bdev != NULL && fn != NULL && ctx != NULL);
   10854             : 
   10855         236 :         iter = calloc(1, sizeof(struct spdk_bdev_channel_iter));
   10856         236 :         if (iter == NULL) {
   10857           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
   10858           0 :                 assert(false);
   10859             :                 return;
   10860             :         }
   10861             : 
   10862         236 :         iter->fn = fn;
   10863         236 :         iter->cpl = cpl;
   10864         236 :         iter->ctx = ctx;
   10865             : 
   10866         472 :         spdk_for_each_channel(__bdev_to_io_dev(bdev), bdev_each_channel_msg,
   10867         236 :                               iter, bdev_each_channel_cpl);
   10868         236 : }
   10869             : 
   10870             : static void
   10871           3 : bdev_copy_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10872             : {
   10873           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10874             : 
   10875           3 :         spdk_bdev_free_io(bdev_io);
   10876             : 
   10877             :         /* Check return status of write */
   10878           3 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
   10879           3 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
   10880           3 : }
   10881             : 
   10882             : static void
   10883           3 : bdev_copy_do_write(void *_bdev_io)
   10884             : {
   10885           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10886             :         int rc;
   10887             : 
   10888             :         /* Write blocks */
   10889           6 :         rc = spdk_bdev_write_blocks_with_md(bdev_io->internal.desc,
   10890           3 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10891           3 :                                             bdev_io->u.bdev.iovs[0].iov_base,
   10892           3 :                                             bdev_io->u.bdev.md_buf, bdev_io->u.bdev.offset_blocks,
   10893           3 :                                             bdev_io->u.bdev.num_blocks, bdev_copy_do_write_done, bdev_io);
   10894             : 
   10895           3 :         if (rc == -ENOMEM) {
   10896           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_write);
   10897           3 :         } else if (rc != 0) {
   10898           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10899           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10900           0 :         }
   10901           3 : }
   10902             : 
   10903             : static void
   10904           3 : bdev_copy_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10905             : {
   10906           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10907             : 
   10908           3 :         spdk_bdev_free_io(bdev_io);
   10909             : 
   10910             :         /* Check return status of read */
   10911           3 :         if (!success) {
   10912           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10913           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
   10914           0 :                 return;
   10915             :         }
   10916             : 
   10917             :         /* Do write */
   10918           3 :         bdev_copy_do_write(parent_io);
   10919           3 : }
   10920             : 
   10921             : static void
   10922           3 : bdev_copy_do_read(void *_bdev_io)
   10923             : {
   10924           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10925             :         int rc;
   10926             : 
   10927             :         /* Read blocks */
   10928           6 :         rc = spdk_bdev_read_blocks_with_md(bdev_io->internal.desc,
   10929           3 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10930           3 :                                            bdev_io->u.bdev.iovs[0].iov_base,
   10931           3 :                                            bdev_io->u.bdev.md_buf, bdev_io->u.bdev.copy.src_offset_blocks,
   10932           3 :                                            bdev_io->u.bdev.num_blocks, bdev_copy_do_read_done, bdev_io);
   10933             : 
   10934           3 :         if (rc == -ENOMEM) {
   10935           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_read);
   10936           3 :         } else if (rc != 0) {
   10937           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10938           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10939           0 :         }
   10940           3 : }
   10941             : 
   10942             : static void
   10943           3 : bdev_copy_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
   10944             : {
   10945           3 :         if (!success) {
   10946           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10947           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10948           0 :                 return;
   10949             :         }
   10950             : 
   10951           3 :         bdev_copy_do_read(bdev_io);
   10952           3 : }
   10953             : 
   10954             : int
   10955          27 : spdk_bdev_copy_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
   10956             :                       uint64_t dst_offset_blocks, uint64_t src_offset_blocks, uint64_t num_blocks,
   10957             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
   10958             : {
   10959          27 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10960             :         struct spdk_bdev_io *bdev_io;
   10961          27 :         struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
   10962             : 
   10963          27 :         if (!desc->write) {
   10964           0 :                 return -EBADF;
   10965             :         }
   10966             : 
   10967          27 :         if (!bdev_io_valid_blocks(bdev, dst_offset_blocks, num_blocks) ||
   10968          27 :             !bdev_io_valid_blocks(bdev, src_offset_blocks, num_blocks)) {
   10969           0 :                 SPDK_DEBUGLOG(bdev,
   10970             :                               "Invalid offset or number of blocks: dst %lu, src %lu, count %lu\n",
   10971             :                               dst_offset_blocks, src_offset_blocks, num_blocks);
   10972           0 :                 return -EINVAL;
   10973             :         }
   10974             : 
   10975          27 :         bdev_io = bdev_channel_get_io(channel);
   10976          27 :         if (!bdev_io) {
   10977           0 :                 return -ENOMEM;
   10978             :         }
   10979             : 
   10980          27 :         bdev_io->internal.ch = channel;
   10981          27 :         bdev_io->internal.desc = desc;
   10982          27 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COPY;
   10983             : 
   10984          27 :         bdev_io->u.bdev.offset_blocks = dst_offset_blocks;
   10985          27 :         bdev_io->u.bdev.copy.src_offset_blocks = src_offset_blocks;
   10986          27 :         bdev_io->u.bdev.num_blocks = num_blocks;
   10987          27 :         bdev_io->u.bdev.memory_domain = NULL;
   10988          27 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
   10989          27 :         bdev_io->u.bdev.iovs = NULL;
   10990          27 :         bdev_io->u.bdev.iovcnt = 0;
   10991          27 :         bdev_io->u.bdev.md_buf = NULL;
   10992          27 :         bdev_io->u.bdev.accel_sequence = NULL;
   10993          27 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
   10994             : 
   10995          27 :         if (dst_offset_blocks == src_offset_blocks || num_blocks == 0) {
   10996           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
   10997           0 :                 return 0;
   10998             :         }
   10999             : 
   11000             : 
   11001             :         /* If the copy size is large and should be split, use the generic split logic
   11002             :          * regardless of whether SPDK_BDEV_IO_TYPE_COPY is supported or not.
   11003             :          *
   11004             :          * Then, send the copy request if SPDK_BDEV_IO_TYPE_COPY is supported or
   11005             :          * emulate it using regular read and write requests otherwise.
   11006             :          */
   11007          27 :         if (spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY) ||
   11008           4 :             bdev_io->internal.f.split) {
   11009          24 :                 bdev_io_submit(bdev_io);
   11010          24 :                 return 0;
   11011             :         }
   11012             : 
   11013           3 :         spdk_bdev_io_get_buf(bdev_io, bdev_copy_get_buf_cb, num_blocks * spdk_bdev_get_block_size(bdev));
   11014             : 
   11015           3 :         return 0;
   11016          27 : }
   11017             : 
   11018           3 : SPDK_LOG_REGISTER_COMPONENT(bdev)
   11019             : 
   11020             : static void
   11021           0 : bdev_trace(void)
   11022             : {
   11023           0 :         struct spdk_trace_tpoint_opts opts[] = {
   11024             :                 {
   11025             :                         "BDEV_IO_START", TRACE_BDEV_IO_START,
   11026             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 1,
   11027             :                         {
   11028             :                                 { "type", SPDK_TRACE_ARG_TYPE_INT, 8 },
   11029             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   11030             :                                 { "offset", SPDK_TRACE_ARG_TYPE_INT, 8 },
   11031             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   11032             :                         }
   11033             :                 },
   11034             :                 {
   11035             :                         "BDEV_IO_DONE", TRACE_BDEV_IO_DONE,
   11036             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 0,
   11037             :                         {
   11038             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   11039             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   11040             :                         }
   11041             :                 },
   11042             :                 {
   11043             :                         "BDEV_IOCH_CREATE", TRACE_BDEV_IOCH_CREATE,
   11044             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   11045             :                         {
   11046             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   11047             :                         }
   11048             :                 },
   11049             :                 {
   11050             :                         "BDEV_IOCH_DESTROY", TRACE_BDEV_IOCH_DESTROY,
   11051             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   11052             :                         {
   11053             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   11054             :                         }
   11055             :                 },
   11056             :         };
   11057             : 
   11058             : 
   11059           0 :         spdk_trace_register_owner_type(OWNER_TYPE_BDEV, 'b');
   11060           0 :         spdk_trace_register_object(OBJECT_BDEV_IO, 'i');
   11061           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
   11062           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_START, OBJECT_BDEV_IO, 0);
   11063           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_DONE, OBJECT_BDEV_IO, 0);
   11064           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_START, OBJECT_BDEV_IO, 0);
   11065           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_COMPLETE, OBJECT_BDEV_IO, 0);
   11066           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_START, OBJECT_BDEV_IO, 0);
   11067           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_DONE, OBJECT_BDEV_IO, 0);
   11068           0 : }
   11069           3 : SPDK_TRACE_REGISTER_FN(bdev_trace, "bdev", TRACE_GROUP_BDEV)

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