LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 3963 5542 71.5 %
Date: 2024-11-04 11:13:37 Functions: 353 448 78.8 %

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

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