LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 4033 5629 71.6 %
Date: 2024-11-20 14:27:19 Functions: 363 467 77.7 %

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

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