LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 3957 5533 71.5 %
Date: 2024-11-18 17:11:58 Functions: 353 449 78.6 %

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

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