LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 4046 5715 70.8 %
Date: 2024-11-20 15:05:50 Functions: 364 472 77.1 %

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

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