LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 4018 5705 70.4 %
Date: 2024-11-15 10:05:49 Functions: 362 470 77.0 %

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

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