LCOV - code coverage report
Current view: top level - lib/bdev - bdev.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 3986 5595 71.2 %
Date: 2024-11-20 06:03:04 Functions: 357 461 77.4 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : #include "spdk/stdinc.h"
       8             : 
       9             : #include "spdk/bdev.h"
      10             : 
      11             : #include "spdk/accel.h"
      12             : #include "spdk/config.h"
      13             : #include "spdk/env.h"
      14             : #include "spdk/thread.h"
      15             : #include "spdk/likely.h"
      16             : #include "spdk/queue.h"
      17             : #include "spdk/nvme_spec.h"
      18             : #include "spdk/scsi_spec.h"
      19             : #include "spdk/notify.h"
      20             : #include "spdk/util.h"
      21             : #include "spdk/trace.h"
      22             : #include "spdk/dma.h"
      23             : 
      24             : #include "spdk/bdev_module.h"
      25             : #include "spdk/log.h"
      26             : #include "spdk/string.h"
      27             : 
      28             : #include "bdev_internal.h"
      29             : #include "spdk_internal/trace_defs.h"
      30             : #include "spdk_internal/assert.h"
      31             : 
      32             : #ifdef SPDK_CONFIG_VTUNE
      33             : #include "ittnotify.h"
      34             : #include "ittnotify_types.h"
      35             : int __itt_init_ittlib(const char *, __itt_group_id);
      36             : #endif
      37             : 
      38             : #define SPDK_BDEV_IO_POOL_SIZE                  (64 * 1024 - 1)
      39             : #define SPDK_BDEV_IO_CACHE_SIZE                 256
      40             : #define SPDK_BDEV_AUTO_EXAMINE                  true
      41             : #define BUF_SMALL_CACHE_SIZE                    128
      42             : #define BUF_LARGE_CACHE_SIZE                    16
      43             : #define NOMEM_THRESHOLD_COUNT                   8
      44             : 
      45             : #define SPDK_BDEV_QOS_TIMESLICE_IN_USEC         1000
      46             : #define SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE      1
      47             : #define SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE    512
      48             : #define SPDK_BDEV_QOS_MIN_IOS_PER_SEC           1000
      49             : #define SPDK_BDEV_QOS_MIN_BYTES_PER_SEC         (1024 * 1024)
      50             : #define SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC        (UINT64_MAX / (1024 * 1024))
      51             : #define SPDK_BDEV_QOS_LIMIT_NOT_DEFINED         UINT64_MAX
      52             : #define SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC      1000
      53             : 
      54             : /* The maximum number of children requests for a UNMAP or WRITE ZEROES command
      55             :  * when splitting into children requests at a time.
      56             :  */
      57             : #define SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS (8)
      58             : #define BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD 1000000
      59             : 
      60             : /* The maximum number of children requests for a COPY command
      61             :  * when splitting into children requests at a time.
      62             :  */
      63             : #define SPDK_BDEV_MAX_CHILDREN_COPY_REQS (8)
      64             : 
      65             : #define LOG_ALREADY_CLAIMED_ERROR(detail, bdev) \
      66             :         log_already_claimed(SPDK_LOG_ERROR, __LINE__, __func__, detail, bdev)
      67             : #ifdef DEBUG
      68             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) \
      69             :         log_already_claimed(SPDK_LOG_DEBUG, __LINE__, __func__, detail, bdev)
      70             : #else
      71             : #define LOG_ALREADY_CLAIMED_DEBUG(detail, bdev) do {} while(0)
      72             : #endif
      73             : 
      74             : static void log_already_claimed(enum spdk_log_level level, const int line, const char *func,
      75             :                                 const char *detail, struct spdk_bdev *bdev);
      76             : 
      77             : static const char *qos_rpc_type[] = {"rw_ios_per_sec",
      78             :                                      "rw_mbytes_per_sec", "r_mbytes_per_sec", "w_mbytes_per_sec"
      79             :                                     };
      80             : 
      81             : TAILQ_HEAD(spdk_bdev_list, spdk_bdev);
      82             : 
      83             : RB_HEAD(bdev_name_tree, spdk_bdev_name);
      84             : 
      85             : static int
      86         546 : bdev_name_cmp(struct spdk_bdev_name *name1, struct spdk_bdev_name *name2)
      87             : {
      88         546 :         return strcmp(name1->name, name2->name);
      89             : }
      90             : 
      91        2056 : RB_GENERATE_STATIC(bdev_name_tree, spdk_bdev_name, node, bdev_name_cmp);
      92             : 
      93             : struct spdk_bdev_mgr {
      94             :         struct spdk_mempool *bdev_io_pool;
      95             : 
      96             :         void *zero_buffer;
      97             : 
      98             :         TAILQ_HEAD(bdev_module_list, spdk_bdev_module) bdev_modules;
      99             : 
     100             :         struct spdk_bdev_list bdevs;
     101             :         struct bdev_name_tree bdev_names;
     102             : 
     103             :         bool init_complete;
     104             :         bool module_init_complete;
     105             : 
     106             :         struct spdk_spinlock spinlock;
     107             : 
     108             :         TAILQ_HEAD(, spdk_bdev_open_async_ctx) async_bdev_opens;
     109             : 
     110             : #ifdef SPDK_CONFIG_VTUNE
     111             :         __itt_domain    *domain;
     112             : #endif
     113             : };
     114             : 
     115             : static struct spdk_bdev_mgr g_bdev_mgr = {
     116             :         .bdev_modules = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdev_modules),
     117             :         .bdevs = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdevs),
     118             :         .bdev_names = RB_INITIALIZER(g_bdev_mgr.bdev_names),
     119             :         .init_complete = false,
     120             :         .module_init_complete = false,
     121             :         .async_bdev_opens = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.async_bdev_opens),
     122             : };
     123             : 
     124             : static void
     125             : __attribute__((constructor))
     126           3 : _bdev_init(void)
     127             : {
     128           3 :         spdk_spin_init(&g_bdev_mgr.spinlock);
     129           3 : }
     130             : 
     131             : typedef void (*lock_range_cb)(struct lba_range *range, void *ctx, int status);
     132             : 
     133             : typedef void (*bdev_copy_bounce_buffer_cpl)(void *ctx, int rc);
     134             : 
     135             : struct lba_range {
     136             :         struct spdk_bdev                *bdev;
     137             :         uint64_t                        offset;
     138             :         uint64_t                        length;
     139             :         bool                            quiesce;
     140             :         void                            *locked_ctx;
     141             :         struct spdk_thread              *owner_thread;
     142             :         struct spdk_bdev_channel        *owner_ch;
     143             :         TAILQ_ENTRY(lba_range)          tailq;
     144             :         TAILQ_ENTRY(lba_range)          tailq_module;
     145             : };
     146             : 
     147             : static struct spdk_bdev_opts    g_bdev_opts = {
     148             :         .bdev_io_pool_size = SPDK_BDEV_IO_POOL_SIZE,
     149             :         .bdev_io_cache_size = SPDK_BDEV_IO_CACHE_SIZE,
     150             :         .bdev_auto_examine = SPDK_BDEV_AUTO_EXAMINE,
     151             :         .iobuf_small_cache_size = BUF_SMALL_CACHE_SIZE,
     152             :         .iobuf_large_cache_size = BUF_LARGE_CACHE_SIZE,
     153             : };
     154             : 
     155             : static spdk_bdev_init_cb        g_init_cb_fn = NULL;
     156             : static void                     *g_init_cb_arg = NULL;
     157             : 
     158             : static spdk_bdev_fini_cb        g_fini_cb_fn = NULL;
     159             : static void                     *g_fini_cb_arg = NULL;
     160             : static struct spdk_thread       *g_fini_thread = NULL;
     161             : 
     162             : struct spdk_bdev_qos_limit {
     163             :         /** IOs or bytes allowed per second (i.e., 1s). */
     164             :         uint64_t limit;
     165             : 
     166             :         /** Remaining IOs or bytes allowed in current timeslice (e.g., 1ms).
     167             :          *  For remaining bytes, allowed to run negative if an I/O is submitted when
     168             :          *  some bytes are remaining, but the I/O is bigger than that amount. The
     169             :          *  excess will be deducted from the next timeslice.
     170             :          */
     171             :         int64_t remaining_this_timeslice;
     172             : 
     173             :         /** Minimum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     174             :         uint32_t min_per_timeslice;
     175             : 
     176             :         /** Maximum allowed IOs or bytes to be issued in one timeslice (e.g., 1ms). */
     177             :         uint32_t max_per_timeslice;
     178             : 
     179             :         /** Function to check whether to queue the IO.
     180             :          * If The IO is allowed to pass, the quota will be reduced correspondingly.
     181             :          */
     182             :         bool (*queue_io)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     183             : 
     184             :         /** Function to rewind the quota once the IO was allowed to be sent by this
     185             :          * limit but queued due to one of the further limits.
     186             :          */
     187             :         void (*rewind_quota)(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io);
     188             : };
     189             : 
     190             : struct spdk_bdev_qos {
     191             :         /** Types of structure of rate limits. */
     192             :         struct spdk_bdev_qos_limit rate_limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
     193             : 
     194             :         /** The channel that all I/O are funneled through. */
     195             :         struct spdk_bdev_channel *ch;
     196             : 
     197             :         /** The thread on which the poller is running. */
     198             :         struct spdk_thread *thread;
     199             : 
     200             :         /** Size of a timeslice in tsc ticks. */
     201             :         uint64_t timeslice_size;
     202             : 
     203             :         /** Timestamp of start of last timeslice. */
     204             :         uint64_t last_timeslice;
     205             : 
     206             :         /** Poller that processes queued I/O commands each time slice. */
     207             :         struct spdk_poller *poller;
     208             : };
     209             : 
     210             : struct spdk_bdev_mgmt_channel {
     211             :         /*
     212             :          * Each thread keeps a cache of bdev_io - this allows
     213             :          *  bdev threads which are *not* DPDK threads to still
     214             :          *  benefit from a per-thread bdev_io cache.  Without
     215             :          *  this, non-DPDK threads fetching from the mempool
     216             :          *  incur a cmpxchg on get and put.
     217             :          */
     218             :         bdev_io_stailq_t per_thread_cache;
     219             :         uint32_t        per_thread_cache_count;
     220             :         uint32_t        bdev_io_cache_size;
     221             : 
     222             :         struct spdk_iobuf_channel iobuf;
     223             : 
     224             :         TAILQ_HEAD(, spdk_bdev_shared_resource) shared_resources;
     225             :         TAILQ_HEAD(, spdk_bdev_io_wait_entry)   io_wait_queue;
     226             : };
     227             : 
     228             : /*
     229             :  * Per-module (or per-io_device) data. Multiple bdevs built on the same io_device
     230             :  * will queue here their IO that awaits retry. It makes it possible to retry sending
     231             :  * IO to one bdev after IO from other bdev completes.
     232             :  */
     233             : struct spdk_bdev_shared_resource {
     234             :         /* The bdev management channel */
     235             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
     236             : 
     237             :         /*
     238             :          * Count of I/O submitted to bdev module and waiting for completion.
     239             :          * Incremented before submit_request() is called on an spdk_bdev_io.
     240             :          */
     241             :         uint64_t                io_outstanding;
     242             : 
     243             :         /*
     244             :          * Queue of IO awaiting retry because of a previous NOMEM status returned
     245             :          *  on this channel.
     246             :          */
     247             :         bdev_io_tailq_t         nomem_io;
     248             : 
     249             :         /*
     250             :          * Threshold which io_outstanding must drop to before retrying nomem_io.
     251             :          */
     252             :         uint64_t                nomem_threshold;
     253             : 
     254             :         /* I/O channel allocated by a bdev module */
     255             :         struct spdk_io_channel  *shared_ch;
     256             : 
     257             :         struct spdk_poller      *nomem_poller;
     258             : 
     259             :         /* Refcount of bdev channels using this resource */
     260             :         uint32_t                ref;
     261             : 
     262             :         TAILQ_ENTRY(spdk_bdev_shared_resource) link;
     263             : };
     264             : 
     265             : #define BDEV_CH_RESET_IN_PROGRESS       (1 << 0)
     266             : #define BDEV_CH_QOS_ENABLED             (1 << 1)
     267             : 
     268             : struct spdk_bdev_channel {
     269             :         struct spdk_bdev        *bdev;
     270             : 
     271             :         /* The channel for the underlying device */
     272             :         struct spdk_io_channel  *channel;
     273             : 
     274             :         /* Accel channel */
     275             :         struct spdk_io_channel  *accel_channel;
     276             : 
     277             :         /* Per io_device per thread data */
     278             :         struct spdk_bdev_shared_resource *shared_resource;
     279             : 
     280             :         struct spdk_bdev_io_stat *stat;
     281             : 
     282             :         /*
     283             :          * Count of I/O submitted to the underlying dev module through this channel
     284             :          * and waiting for completion.
     285             :          */
     286             :         uint64_t                io_outstanding;
     287             : 
     288             :         /*
     289             :          * List of all submitted I/Os including I/O that are generated via splitting.
     290             :          */
     291             :         bdev_io_tailq_t         io_submitted;
     292             : 
     293             :         /*
     294             :          * List of spdk_bdev_io that are currently queued because they write to a locked
     295             :          * LBA range.
     296             :          */
     297             :         bdev_io_tailq_t         io_locked;
     298             : 
     299             :         /* List of I/Os with accel sequence being currently executed */
     300             :         bdev_io_tailq_t         io_accel_exec;
     301             : 
     302             :         /* List of I/Os doing memory domain pull/push */
     303             :         bdev_io_tailq_t         io_memory_domain;
     304             : 
     305             :         uint32_t                flags;
     306             : 
     307             :         /* Counts number of bdev_io in the io_submitted TAILQ */
     308             :         uint16_t                queue_depth;
     309             : 
     310             :         uint16_t                trace_id;
     311             : 
     312             :         struct spdk_histogram_data *histogram;
     313             : 
     314             : #ifdef SPDK_CONFIG_VTUNE
     315             :         uint64_t                start_tsc;
     316             :         uint64_t                interval_tsc;
     317             :         __itt_string_handle     *handle;
     318             :         struct spdk_bdev_io_stat *prev_stat;
     319             : #endif
     320             : 
     321             :         bdev_io_tailq_t         queued_resets;
     322             : 
     323             :         lba_range_tailq_t       locked_ranges;
     324             : 
     325             :         /** List of I/Os queued by QoS. */
     326             :         bdev_io_tailq_t         qos_queued_io;
     327             : };
     328             : 
     329             : struct media_event_entry {
     330             :         struct spdk_bdev_media_event    event;
     331             :         TAILQ_ENTRY(media_event_entry)  tailq;
     332             : };
     333             : 
     334             : #define MEDIA_EVENT_POOL_SIZE 64
     335             : 
     336             : struct spdk_bdev_desc {
     337             :         struct spdk_bdev                *bdev;
     338             :         bool                            write;
     339             :         bool                            memory_domains_supported;
     340             :         bool                            accel_sequence_supported[SPDK_BDEV_NUM_IO_TYPES];
     341             :         struct spdk_bdev_open_opts      opts;
     342             :         struct spdk_thread              *thread;
     343             :         struct {
     344             :                 spdk_bdev_event_cb_t event_fn;
     345             :                 void *ctx;
     346             :         }                               callback;
     347             :         bool                            closed;
     348             :         struct spdk_spinlock            spinlock;
     349             :         uint32_t                        refs;
     350             :         TAILQ_HEAD(, media_event_entry) pending_media_events;
     351             :         TAILQ_HEAD(, media_event_entry) free_media_events;
     352             :         struct media_event_entry        *media_events_buffer;
     353             :         TAILQ_ENTRY(spdk_bdev_desc)     link;
     354             : 
     355             :         uint64_t                timeout_in_sec;
     356             :         spdk_bdev_io_timeout_cb cb_fn;
     357             :         void                    *cb_arg;
     358             :         struct spdk_poller      *io_timeout_poller;
     359             :         struct spdk_bdev_module_claim   *claim;
     360             : };
     361             : 
     362             : struct spdk_bdev_iostat_ctx {
     363             :         struct spdk_bdev_io_stat *stat;
     364             :         enum spdk_bdev_reset_stat_mode reset_mode;
     365             :         spdk_bdev_get_device_stat_cb cb;
     366             :         void *cb_arg;
     367             : };
     368             : 
     369             : struct set_qos_limit_ctx {
     370             :         void (*cb_fn)(void *cb_arg, int status);
     371             :         void *cb_arg;
     372             :         struct spdk_bdev *bdev;
     373             : };
     374             : 
     375             : struct spdk_bdev_channel_iter {
     376             :         spdk_bdev_for_each_channel_msg fn;
     377             :         spdk_bdev_for_each_channel_done cpl;
     378             :         struct spdk_io_channel_iter *i;
     379             :         void *ctx;
     380             : };
     381             : 
     382             : struct spdk_bdev_io_error_stat {
     383             :         uint32_t error_status[-SPDK_MIN_BDEV_IO_STATUS];
     384             : };
     385             : 
     386             : enum bdev_io_retry_state {
     387             :         BDEV_IO_RETRY_STATE_INVALID,
     388             :         BDEV_IO_RETRY_STATE_PULL,
     389             :         BDEV_IO_RETRY_STATE_PULL_MD,
     390             :         BDEV_IO_RETRY_STATE_SUBMIT,
     391             :         BDEV_IO_RETRY_STATE_PUSH,
     392             :         BDEV_IO_RETRY_STATE_PUSH_MD,
     393             : };
     394             : 
     395             : #define __bdev_to_io_dev(bdev)          (((char *)bdev) + 1)
     396             : #define __bdev_from_io_dev(io_dev)      ((struct spdk_bdev *)(((char *)io_dev) - 1))
     397             : #define __io_ch_to_bdev_ch(io_ch)       ((struct spdk_bdev_channel *)spdk_io_channel_get_ctx(io_ch))
     398             : #define __io_ch_to_bdev_mgmt_ch(io_ch)  ((struct spdk_bdev_mgmt_channel *)spdk_io_channel_get_ctx(io_ch))
     399             : 
     400             : static inline void bdev_io_complete(void *ctx);
     401             : static inline void bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io);
     402             : static void bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io);
     403             : static void bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io);
     404             : 
     405             : static void bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
     406             : static int bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io);
     407             : 
     408             : static void bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
     409             :                                 struct spdk_io_channel *ch, void *_ctx);
     410             : static void bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status);
     411             : 
     412             : static int bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     413             :                                      struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
     414             :                                      uint64_t num_blocks,
     415             :                                      struct spdk_memory_domain *domain, void *domain_ctx,
     416             :                                      struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     417             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg);
     418             : static int bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
     419             :                                       struct iovec *iov, int iovcnt, void *md_buf,
     420             :                                       uint64_t offset_blocks, uint64_t num_blocks,
     421             :                                       struct spdk_memory_domain *domain, void *domain_ctx,
     422             :                                       struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
     423             :                                       uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
     424             :                                       spdk_bdev_io_completion_cb cb, void *cb_arg);
     425             : 
     426             : static int bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     427             :                                uint64_t offset, uint64_t length,
     428             :                                lock_range_cb cb_fn, void *cb_arg);
     429             : 
     430             : static int bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
     431             :                                  uint64_t offset, uint64_t length,
     432             :                                  lock_range_cb cb_fn, void *cb_arg);
     433             : 
     434             : static bool bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort);
     435             : static bool bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *ch, struct spdk_bdev_io *bio_to_abort);
     436             : 
     437             : static bool claim_type_is_v2(enum spdk_bdev_claim_type type);
     438             : static void bdev_desc_release_claims(struct spdk_bdev_desc *desc);
     439             : static void claim_reset(struct spdk_bdev *bdev);
     440             : 
     441             : static void bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch);
     442             : 
     443             : static bool bdev_io_should_split(struct spdk_bdev_io *bdev_io);
     444             : 
     445             : #define bdev_get_ext_io_opt(opts, field, defval) \
     446             :         ((opts) != NULL ? SPDK_GET_FIELD(opts, field, defval) : (defval))
     447             : 
     448             : static inline void
     449         669 : bdev_ch_add_to_io_submitted(struct spdk_bdev_io *bdev_io)
     450             : {
     451         669 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     452         669 :         bdev_io->internal.ch->queue_depth++;
     453         669 : }
     454             : 
     455             : static inline void
     456         669 : bdev_ch_remove_from_io_submitted(struct spdk_bdev_io *bdev_io)
     457             : {
     458         669 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_submitted, bdev_io, internal.ch_link);
     459         669 :         bdev_io->internal.ch->queue_depth--;
     460         669 : }
     461             : 
     462             : void
     463          14 : spdk_bdev_get_opts(struct spdk_bdev_opts *opts, size_t opts_size)
     464             : {
     465          14 :         if (!opts) {
     466           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
     467           0 :                 return;
     468             :         }
     469             : 
     470          14 :         if (!opts_size) {
     471           0 :                 SPDK_ERRLOG("opts_size should not be zero value\n");
     472           0 :                 return;
     473             :         }
     474             : 
     475          14 :         opts->opts_size = opts_size;
     476             : 
     477             : #define SET_FIELD(field) \
     478             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts_size) { \
     479             :                 opts->field = g_bdev_opts.field; \
     480             :         } \
     481             : 
     482          14 :         SET_FIELD(bdev_io_pool_size);
     483          14 :         SET_FIELD(bdev_io_cache_size);
     484          14 :         SET_FIELD(bdev_auto_examine);
     485          14 :         SET_FIELD(iobuf_small_cache_size);
     486          14 :         SET_FIELD(iobuf_large_cache_size);
     487             : 
     488             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
     489             :          * and do not forget to add the SET_FIELD statement for your added field. */
     490             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_opts) == 32, "Incorrect size");
     491             : 
     492             : #undef SET_FIELD
     493          14 : }
     494             : 
     495             : int
     496          15 : spdk_bdev_set_opts(struct spdk_bdev_opts *opts)
     497             : {
     498             :         uint32_t min_pool_size;
     499             : 
     500          15 :         if (!opts) {
     501           0 :                 SPDK_ERRLOG("opts cannot be NULL\n");
     502           0 :                 return -1;
     503             :         }
     504             : 
     505          15 :         if (!opts->opts_size) {
     506           1 :                 SPDK_ERRLOG("opts_size inside opts cannot be zero value\n");
     507           1 :                 return -1;
     508             :         }
     509             : 
     510             :         /*
     511             :          * Add 1 to the thread count to account for the extra mgmt_ch that gets created during subsystem
     512             :          *  initialization.  A second mgmt_ch will be created on the same thread when the application starts
     513             :          *  but before the deferred put_io_channel event is executed for the first mgmt_ch.
     514             :          */
     515          14 :         min_pool_size = opts->bdev_io_cache_size * (spdk_thread_get_count() + 1);
     516          14 :         if (opts->bdev_io_pool_size < min_pool_size) {
     517           0 :                 SPDK_ERRLOG("bdev_io_pool_size %" PRIu32 " is not compatible with bdev_io_cache_size %" PRIu32
     518             :                             " and %" PRIu32 " threads\n", opts->bdev_io_pool_size, opts->bdev_io_cache_size,
     519             :                             spdk_thread_get_count());
     520           0 :                 SPDK_ERRLOG("bdev_io_pool_size must be at least %" PRIu32 "\n", min_pool_size);
     521           0 :                 return -1;
     522             :         }
     523             : 
     524             : #define SET_FIELD(field) \
     525             :         if (offsetof(struct spdk_bdev_opts, field) + sizeof(opts->field) <= opts->opts_size) { \
     526             :                 g_bdev_opts.field = opts->field; \
     527             :         } \
     528             : 
     529          14 :         SET_FIELD(bdev_io_pool_size);
     530          14 :         SET_FIELD(bdev_io_cache_size);
     531          14 :         SET_FIELD(bdev_auto_examine);
     532          14 :         SET_FIELD(iobuf_small_cache_size);
     533          14 :         SET_FIELD(iobuf_large_cache_size);
     534             : 
     535          14 :         g_bdev_opts.opts_size = opts->opts_size;
     536             : 
     537             : #undef SET_FIELD
     538             : 
     539          14 :         return 0;
     540          15 : }
     541             : 
     542             : static struct spdk_bdev *
     543         146 : bdev_get_by_name(const char *bdev_name)
     544             : {
     545             :         struct spdk_bdev_name find;
     546             :         struct spdk_bdev_name *res;
     547             : 
     548         146 :         find.name = (char *)bdev_name;
     549         146 :         res = RB_FIND(bdev_name_tree, &g_bdev_mgr.bdev_names, &find);
     550         146 :         if (res != NULL) {
     551         139 :                 return res->bdev;
     552             :         }
     553             : 
     554           7 :         return NULL;
     555         146 : }
     556             : 
     557             : struct spdk_bdev *
     558          16 : spdk_bdev_get_by_name(const char *bdev_name)
     559             : {
     560             :         struct spdk_bdev *bdev;
     561             : 
     562          16 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
     563          16 :         bdev = bdev_get_by_name(bdev_name);
     564          16 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
     565             : 
     566          16 :         return bdev;
     567             : }
     568             : 
     569             : struct bdev_io_status_string {
     570             :         enum spdk_bdev_io_status status;
     571             :         const char *str;
     572             : };
     573             : 
     574             : static const struct bdev_io_status_string bdev_io_status_strings[] = {
     575             :         { SPDK_BDEV_IO_STATUS_AIO_ERROR, "aio_error" },
     576             :         { SPDK_BDEV_IO_STATUS_ABORTED, "aborted" },
     577             :         { SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED, "first_fused_failed" },
     578             :         { SPDK_BDEV_IO_STATUS_MISCOMPARE, "miscompare" },
     579             :         { SPDK_BDEV_IO_STATUS_NOMEM, "nomem" },
     580             :         { SPDK_BDEV_IO_STATUS_SCSI_ERROR, "scsi_error" },
     581             :         { SPDK_BDEV_IO_STATUS_NVME_ERROR, "nvme_error" },
     582             :         { SPDK_BDEV_IO_STATUS_FAILED, "failed" },
     583             :         { SPDK_BDEV_IO_STATUS_PENDING, "pending" },
     584             :         { SPDK_BDEV_IO_STATUS_SUCCESS, "success" },
     585             : };
     586             : 
     587             : static const char *
     588           0 : bdev_io_status_get_string(enum spdk_bdev_io_status status)
     589             : {
     590             :         uint32_t i;
     591             : 
     592           0 :         for (i = 0; i < SPDK_COUNTOF(bdev_io_status_strings); i++) {
     593           0 :                 if (bdev_io_status_strings[i].status == status) {
     594           0 :                         return bdev_io_status_strings[i].str;
     595             :                 }
     596           0 :         }
     597             : 
     598           0 :         return "reserved";
     599           0 : }
     600             : 
     601             : struct spdk_bdev_wait_for_examine_ctx {
     602             :         struct spdk_poller              *poller;
     603             :         spdk_bdev_wait_for_examine_cb   cb_fn;
     604             :         void                            *cb_arg;
     605             : };
     606             : 
     607             : static bool bdev_module_all_actions_completed(void);
     608             : 
     609             : static int
     610         192 : bdev_wait_for_examine_cb(void *arg)
     611             : {
     612         192 :         struct spdk_bdev_wait_for_examine_ctx *ctx = arg;
     613             : 
     614         192 :         if (!bdev_module_all_actions_completed()) {
     615           0 :                 return SPDK_POLLER_IDLE;
     616             :         }
     617             : 
     618         192 :         spdk_poller_unregister(&ctx->poller);
     619         192 :         ctx->cb_fn(ctx->cb_arg);
     620         192 :         free(ctx);
     621             : 
     622         192 :         return SPDK_POLLER_BUSY;
     623         192 : }
     624             : 
     625             : int
     626         192 : spdk_bdev_wait_for_examine(spdk_bdev_wait_for_examine_cb cb_fn, void *cb_arg)
     627             : {
     628             :         struct spdk_bdev_wait_for_examine_ctx *ctx;
     629             : 
     630         192 :         ctx = calloc(1, sizeof(*ctx));
     631         192 :         if (ctx == NULL) {
     632           0 :                 return -ENOMEM;
     633             :         }
     634         192 :         ctx->cb_fn = cb_fn;
     635         192 :         ctx->cb_arg = cb_arg;
     636         192 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_wait_for_examine_cb, ctx, 0);
     637             : 
     638         192 :         return 0;
     639         192 : }
     640             : 
     641             : struct spdk_bdev_examine_item {
     642             :         char *name;
     643             :         TAILQ_ENTRY(spdk_bdev_examine_item) link;
     644             : };
     645             : 
     646             : TAILQ_HEAD(spdk_bdev_examine_allowlist, spdk_bdev_examine_item);
     647             : 
     648             : struct spdk_bdev_examine_allowlist g_bdev_examine_allowlist = TAILQ_HEAD_INITIALIZER(
     649             :                         g_bdev_examine_allowlist);
     650             : 
     651             : static inline bool
     652           6 : bdev_examine_allowlist_check(const char *name)
     653             : {
     654             :         struct spdk_bdev_examine_item *item;
     655           6 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     656           0 :                 if (strcmp(name, item->name) == 0) {
     657           0 :                         return true;
     658             :                 }
     659           0 :         }
     660           6 :         return false;
     661           6 : }
     662             : 
     663             : static inline void
     664          65 : bdev_examine_allowlist_free(void)
     665             : {
     666             :         struct spdk_bdev_examine_item *item;
     667          65 :         while (!TAILQ_EMPTY(&g_bdev_examine_allowlist)) {
     668           0 :                 item = TAILQ_FIRST(&g_bdev_examine_allowlist);
     669           0 :                 TAILQ_REMOVE(&g_bdev_examine_allowlist, item, link);
     670           0 :                 free(item->name);
     671           0 :                 free(item);
     672             :         }
     673          65 : }
     674             : 
     675             : static inline bool
     676           3 : bdev_in_examine_allowlist(struct spdk_bdev *bdev)
     677             : {
     678             :         struct spdk_bdev_alias *tmp;
     679           3 :         if (bdev_examine_allowlist_check(bdev->name)) {
     680           0 :                 return true;
     681             :         }
     682           6 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
     683           3 :                 if (bdev_examine_allowlist_check(tmp->alias.name)) {
     684           0 :                         return true;
     685             :                 }
     686           3 :         }
     687           3 :         return false;
     688           3 : }
     689             : 
     690             : static inline bool
     691         125 : bdev_ok_to_examine(struct spdk_bdev *bdev)
     692             : {
     693             :         /* Some bdevs may not support the READ command.
     694             :          * Do not try to examine them.
     695             :          */
     696         125 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_READ)) {
     697           0 :                 return false;
     698             :         }
     699             : 
     700         125 :         if (g_bdev_opts.bdev_auto_examine) {
     701         122 :                 return true;
     702             :         } else {
     703           3 :                 return bdev_in_examine_allowlist(bdev);
     704             :         }
     705         125 : }
     706             : 
     707             : static void
     708         125 : bdev_examine(struct spdk_bdev *bdev)
     709             : {
     710             :         struct spdk_bdev_module *module;
     711             :         struct spdk_bdev_module_claim *claim, *tmpclaim;
     712             :         uint32_t action;
     713             : 
     714         125 :         if (!bdev_ok_to_examine(bdev)) {
     715           3 :                 return;
     716             :         }
     717             : 
     718         499 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     719         377 :                 if (module->examine_config) {
     720         255 :                         spdk_spin_lock(&module->internal.spinlock);
     721         255 :                         action = module->internal.action_in_progress;
     722         255 :                         module->internal.action_in_progress++;
     723         255 :                         spdk_spin_unlock(&module->internal.spinlock);
     724         255 :                         module->examine_config(bdev);
     725         255 :                         if (action != module->internal.action_in_progress) {
     726           0 :                                 SPDK_ERRLOG("examine_config for module %s did not call "
     727             :                                             "spdk_bdev_module_examine_done()\n", module->name);
     728           0 :                         }
     729         255 :                 }
     730         377 :         }
     731             : 
     732         122 :         spdk_spin_lock(&bdev->internal.spinlock);
     733             : 
     734         122 :         switch (bdev->internal.claim_type) {
     735             :         case SPDK_BDEV_CLAIM_NONE:
     736             :                 /* Examine by all bdev modules */
     737         474 :                 TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
     738         357 :                         if (module->examine_disk) {
     739         231 :                                 spdk_spin_lock(&module->internal.spinlock);
     740         231 :                                 module->internal.action_in_progress++;
     741         231 :                                 spdk_spin_unlock(&module->internal.spinlock);
     742         231 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
     743         231 :                                 module->examine_disk(bdev);
     744         231 :                                 spdk_spin_lock(&bdev->internal.spinlock);
     745         231 :                         }
     746         357 :                 }
     747         117 :                 break;
     748             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
     749             :                 /* Examine by the one bdev module with a v1 claim */
     750           1 :                 module = bdev->internal.claim.v1.module;
     751           1 :                 if (module->examine_disk) {
     752           1 :                         spdk_spin_lock(&module->internal.spinlock);
     753           1 :                         module->internal.action_in_progress++;
     754           1 :                         spdk_spin_unlock(&module->internal.spinlock);
     755           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     756           1 :                         module->examine_disk(bdev);
     757           1 :                         return;
     758             :                 }
     759           0 :                 break;
     760             :         default:
     761             :                 /* Examine by all bdev modules with a v2 claim */
     762           4 :                 assert(claim_type_is_v2(bdev->internal.claim_type));
     763             :                 /*
     764             :                  * Removal of tailq nodes while iterating can cause the iteration to jump out of the
     765             :                  * list, perhaps accessing freed memory. Without protection, this could happen
     766             :                  * while the lock is dropped during the examine callback.
     767             :                  */
     768           4 :                 bdev->internal.examine_in_progress++;
     769             : 
     770           9 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
     771           5 :                         module = claim->module;
     772             : 
     773           5 :                         if (module == NULL) {
     774             :                                 /* This is a vestigial claim, held by examine_count */
     775           0 :                                 continue;
     776             :                         }
     777             : 
     778           5 :                         if (module->examine_disk == NULL) {
     779           0 :                                 continue;
     780             :                         }
     781             : 
     782           5 :                         spdk_spin_lock(&module->internal.spinlock);
     783           5 :                         module->internal.action_in_progress++;
     784           5 :                         spdk_spin_unlock(&module->internal.spinlock);
     785             : 
     786             :                         /* Call examine_disk without holding internal.spinlock. */
     787           5 :                         spdk_spin_unlock(&bdev->internal.spinlock);
     788           5 :                         module->examine_disk(bdev);
     789           5 :                         spdk_spin_lock(&bdev->internal.spinlock);
     790           5 :                 }
     791             : 
     792           4 :                 assert(bdev->internal.examine_in_progress > 0);
     793           4 :                 bdev->internal.examine_in_progress--;
     794           4 :                 if (bdev->internal.examine_in_progress == 0) {
     795             :                         /* Remove any claims that were released during examine_disk */
     796           9 :                         TAILQ_FOREACH_SAFE(claim, &bdev->internal.claim.v2.claims, link, tmpclaim) {
     797           5 :                                 if (claim->desc != NULL) {
     798           5 :                                         continue;
     799             :                                 }
     800             : 
     801           0 :                                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, claim, link);
     802           0 :                                 free(claim);
     803           0 :                         }
     804           4 :                         if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
     805           0 :                                 claim_reset(bdev);
     806           0 :                         }
     807           4 :                 }
     808           4 :         }
     809             : 
     810         121 :         spdk_spin_unlock(&bdev->internal.spinlock);
     811         125 : }
     812             : 
     813             : int
     814           1 : spdk_bdev_examine(const char *name)
     815             : {
     816             :         struct spdk_bdev *bdev;
     817             :         struct spdk_bdev_examine_item *item;
     818           1 :         struct spdk_thread *thread = spdk_get_thread();
     819             : 
     820           1 :         if (spdk_unlikely(!spdk_thread_is_app_thread(thread))) {
     821           1 :                 SPDK_ERRLOG("Cannot examine bdev %s on thread %p (%s)\n", name, thread,
     822             :                             thread ? spdk_thread_get_name(thread) : "null");
     823           1 :                 return -EINVAL;
     824             :         }
     825             : 
     826           0 :         if (g_bdev_opts.bdev_auto_examine) {
     827           0 :                 SPDK_ERRLOG("Manual examine is not allowed if auto examine is enabled\n");
     828           0 :                 return -EINVAL;
     829             :         }
     830             : 
     831           0 :         if (bdev_examine_allowlist_check(name)) {
     832           0 :                 SPDK_ERRLOG("Duplicate bdev name for manual examine: %s\n", name);
     833           0 :                 return -EEXIST;
     834             :         }
     835             : 
     836           0 :         item = calloc(1, sizeof(*item));
     837           0 :         if (!item) {
     838           0 :                 return -ENOMEM;
     839             :         }
     840           0 :         item->name = strdup(name);
     841           0 :         if (!item->name) {
     842           0 :                 free(item);
     843           0 :                 return -ENOMEM;
     844             :         }
     845           0 :         TAILQ_INSERT_TAIL(&g_bdev_examine_allowlist, item, link);
     846             : 
     847           0 :         bdev = spdk_bdev_get_by_name(name);
     848           0 :         if (bdev) {
     849           0 :                 bdev_examine(bdev);
     850           0 :         }
     851           0 :         return 0;
     852           1 : }
     853             : 
     854             : static inline void
     855           0 : bdev_examine_allowlist_config_json(struct spdk_json_write_ctx *w)
     856             : {
     857             :         struct spdk_bdev_examine_item *item;
     858           0 :         TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
     859           0 :                 spdk_json_write_object_begin(w);
     860           0 :                 spdk_json_write_named_string(w, "method", "bdev_examine");
     861           0 :                 spdk_json_write_named_object_begin(w, "params");
     862           0 :                 spdk_json_write_named_string(w, "name", item->name);
     863           0 :                 spdk_json_write_object_end(w);
     864           0 :                 spdk_json_write_object_end(w);
     865           0 :         }
     866           0 : }
     867             : 
     868             : struct spdk_bdev *
     869           1 : spdk_bdev_first(void)
     870             : {
     871             :         struct spdk_bdev *bdev;
     872             : 
     873           1 :         bdev = TAILQ_FIRST(&g_bdev_mgr.bdevs);
     874           1 :         if (bdev) {
     875           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     876           1 :         }
     877             : 
     878           1 :         return bdev;
     879             : }
     880             : 
     881             : struct spdk_bdev *
     882           8 : spdk_bdev_next(struct spdk_bdev *prev)
     883             : {
     884             :         struct spdk_bdev *bdev;
     885             : 
     886           8 :         bdev = TAILQ_NEXT(prev, internal.link);
     887           8 :         if (bdev) {
     888           7 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     889           7 :         }
     890             : 
     891           8 :         return bdev;
     892             : }
     893             : 
     894             : static struct spdk_bdev *
     895           6 : _bdev_next_leaf(struct spdk_bdev *bdev)
     896             : {
     897           9 :         while (bdev != NULL) {
     898           8 :                 if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
     899           5 :                         return bdev;
     900             :                 } else {
     901           3 :                         bdev = TAILQ_NEXT(bdev, internal.link);
     902             :                 }
     903             :         }
     904             : 
     905           1 :         return bdev;
     906           6 : }
     907             : 
     908             : struct spdk_bdev *
     909           1 : spdk_bdev_first_leaf(void)
     910             : {
     911             :         struct spdk_bdev *bdev;
     912             : 
     913           1 :         bdev = _bdev_next_leaf(TAILQ_FIRST(&g_bdev_mgr.bdevs));
     914             : 
     915           1 :         if (bdev) {
     916           1 :                 SPDK_DEBUGLOG(bdev, "Starting bdev iteration at %s\n", bdev->name);
     917           1 :         }
     918             : 
     919           1 :         return bdev;
     920             : }
     921             : 
     922             : struct spdk_bdev *
     923           5 : spdk_bdev_next_leaf(struct spdk_bdev *prev)
     924             : {
     925             :         struct spdk_bdev *bdev;
     926             : 
     927           5 :         bdev = _bdev_next_leaf(TAILQ_NEXT(prev, internal.link));
     928             : 
     929           5 :         if (bdev) {
     930           4 :                 SPDK_DEBUGLOG(bdev, "Continuing bdev iteration at %s\n", bdev->name);
     931           4 :         }
     932             : 
     933           5 :         return bdev;
     934             : }
     935             : 
     936             : static inline bool
     937         816 : bdev_io_use_memory_domain(struct spdk_bdev_io *bdev_io)
     938             : {
     939         816 :         return bdev_io->internal.f.has_memory_domain;
     940             : }
     941             : 
     942             : static inline bool
     943        1553 : bdev_io_use_accel_sequence(struct spdk_bdev_io *bdev_io)
     944             : {
     945        1553 :         return bdev_io->internal.f.has_accel_sequence;
     946             : }
     947             : 
     948             : static inline void
     949           7 : bdev_queue_nomem_io_head(struct spdk_bdev_shared_resource *shared_resource,
     950             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
     951             : {
     952             :         /* Wait for some of the outstanding I/O to complete before we retry any of the nomem_io.
     953             :          * Normally we will wait for NOMEM_THRESHOLD_COUNT I/O to complete but for low queue depth
     954             :          * channels we will instead wait for half to complete.
     955             :          */
     956           7 :         shared_resource->nomem_threshold = spdk_max((int64_t)shared_resource->io_outstanding / 2,
     957             :                                            (int64_t)shared_resource->io_outstanding - NOMEM_THRESHOLD_COUNT);
     958             : 
     959           7 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
     960           7 :         bdev_io->internal.retry_state = state;
     961           7 :         TAILQ_INSERT_HEAD(&shared_resource->nomem_io, bdev_io, internal.link);
     962           7 : }
     963             : 
     964             : static inline void
     965          43 : bdev_queue_nomem_io_tail(struct spdk_bdev_shared_resource *shared_resource,
     966             :                          struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
     967             : {
     968             :         /* We only queue IOs at the end of the nomem_io queue if they're submitted by the user while
     969             :          * the queue isn't empty, so we don't need to update the nomem_threshold here */
     970          43 :         assert(!TAILQ_EMPTY(&shared_resource->nomem_io));
     971             : 
     972          43 :         assert(state != BDEV_IO_RETRY_STATE_INVALID);
     973          43 :         bdev_io->internal.retry_state = state;
     974          43 :         TAILQ_INSERT_TAIL(&shared_resource->nomem_io, bdev_io, internal.link);
     975          43 : }
     976             : 
     977             : void
     978          16 : spdk_bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len)
     979             : {
     980             :         struct iovec *iovs;
     981             : 
     982          16 :         if (bdev_io->u.bdev.iovs == NULL) {
     983           3 :                 bdev_io->u.bdev.iovs = &bdev_io->iov;
     984           3 :                 bdev_io->u.bdev.iovcnt = 1;
     985           3 :         }
     986             : 
     987          16 :         iovs = bdev_io->u.bdev.iovs;
     988             : 
     989          16 :         assert(iovs != NULL);
     990          16 :         assert(bdev_io->u.bdev.iovcnt >= 1);
     991             : 
     992          16 :         iovs[0].iov_base = buf;
     993          16 :         iovs[0].iov_len = len;
     994          16 : }
     995             : 
     996             : void
     997           3 : spdk_bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
     998             : {
     999           3 :         assert((len / spdk_bdev_get_md_size(bdev_io->bdev)) >= bdev_io->u.bdev.num_blocks);
    1000           3 :         bdev_io->u.bdev.md_buf = md_buf;
    1001           3 : }
    1002             : 
    1003             : static bool
    1004         167 : _is_buf_allocated(const struct iovec *iovs)
    1005             : {
    1006         167 :         if (iovs == NULL) {
    1007           6 :                 return false;
    1008             :         }
    1009             : 
    1010         161 :         return iovs[0].iov_base != NULL;
    1011         167 : }
    1012             : 
    1013             : static bool
    1014          50 : _are_iovs_aligned(struct iovec *iovs, int iovcnt, uint32_t alignment)
    1015             : {
    1016             :         int i;
    1017             :         uintptr_t iov_base;
    1018             : 
    1019          50 :         if (spdk_likely(alignment == 1)) {
    1020          21 :                 return true;
    1021             :         }
    1022             : 
    1023          36 :         for (i = 0; i < iovcnt; i++) {
    1024          29 :                 iov_base = (uintptr_t)iovs[i].iov_base;
    1025          29 :                 if ((iov_base & (alignment - 1)) != 0) {
    1026          22 :                         return false;
    1027             :                 }
    1028           7 :         }
    1029             : 
    1030           7 :         return true;
    1031          50 : }
    1032             : 
    1033             : static inline bool
    1034         856 : bdev_io_needs_sequence_exec(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    1035             : {
    1036         856 :         if (!bdev_io_use_accel_sequence(bdev_io)) {
    1037         856 :                 return false;
    1038             :         }
    1039             : 
    1040             :         /* For now, we don't allow splitting IOs with an accel sequence and will treat them as if
    1041             :          * bdev module didn't support accel sequences */
    1042           0 :         return !desc->accel_sequence_supported[bdev_io->type] || bdev_io->internal.f.split;
    1043         856 : }
    1044             : 
    1045             : static inline void
    1046         592 : bdev_io_increment_outstanding(struct spdk_bdev_channel *bdev_ch,
    1047             :                               struct spdk_bdev_shared_resource *shared_resource)
    1048             : {
    1049         592 :         bdev_ch->io_outstanding++;
    1050         592 :         shared_resource->io_outstanding++;
    1051         592 : }
    1052             : 
    1053             : static inline void
    1054         592 : bdev_io_decrement_outstanding(struct spdk_bdev_channel *bdev_ch,
    1055             :                               struct spdk_bdev_shared_resource *shared_resource)
    1056             : {
    1057         592 :         assert(bdev_ch->io_outstanding > 0);
    1058         592 :         assert(shared_resource->io_outstanding > 0);
    1059         592 :         bdev_ch->io_outstanding--;
    1060         592 :         shared_resource->io_outstanding--;
    1061         592 : }
    1062             : 
    1063             : static void
    1064           0 : bdev_io_submit_sequence_cb(void *ctx, int status)
    1065             : {
    1066           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1067             : 
    1068           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1069             : 
    1070           0 :         bdev_io->u.bdev.accel_sequence = NULL;
    1071           0 :         bdev_io->internal.f.has_accel_sequence = false;
    1072             : 
    1073           0 :         if (spdk_unlikely(status != 0)) {
    1074           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    1075           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1076           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    1077           0 :                 return;
    1078             :         }
    1079             : 
    1080           0 :         bdev_io_submit(bdev_io);
    1081           0 : }
    1082             : 
    1083             : static void
    1084           0 : bdev_io_exec_sequence_cb(void *ctx, int status)
    1085             : {
    1086           0 :         struct spdk_bdev_io *bdev_io = ctx;
    1087           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1088             : 
    1089           0 :         TAILQ_REMOVE(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1090           0 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1091             : 
    1092           0 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1093           0 :                 bdev_ch_retry_io(ch);
    1094           0 :         }
    1095             : 
    1096           0 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1097           0 : }
    1098             : 
    1099             : static void
    1100           0 : bdev_io_exec_sequence(struct spdk_bdev_io *bdev_io, void (*cb_fn)(void *ctx, int status))
    1101             : {
    1102           0 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1103             : 
    1104           0 :         assert(bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1105           0 :         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE || bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1106           0 :         assert(bdev_io_use_accel_sequence(bdev_io));
    1107             : 
    1108             :         /* Since the operations are appended during submission, they're in the opposite order than
    1109             :          * how we want to execute them for reads (i.e. we need to execute the most recently added
    1110             :          * operation first), so reverse the sequence before executing it.
    1111             :          */
    1112           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1113           0 :                 spdk_accel_sequence_reverse(bdev_io->internal.accel_sequence);
    1114           0 :         }
    1115             : 
    1116           0 :         TAILQ_INSERT_TAIL(&bdev_io->internal.ch->io_accel_exec, bdev_io, internal.link);
    1117           0 :         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1118           0 :         bdev_io->internal.data_transfer_cpl = cb_fn;
    1119             : 
    1120           0 :         spdk_accel_sequence_finish(bdev_io->internal.accel_sequence,
    1121           0 :                                    bdev_io_exec_sequence_cb, bdev_io);
    1122           0 : }
    1123             : 
    1124             : static void
    1125          42 : bdev_io_get_buf_complete(struct spdk_bdev_io *bdev_io, bool status)
    1126             : {
    1127          42 :         struct spdk_io_channel *ch = spdk_bdev_io_get_io_channel(bdev_io);
    1128             :         void *buf;
    1129             : 
    1130          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1131           0 :                 buf = bdev_io->internal.buf.ptr;
    1132           0 :                 bdev_io->internal.buf.ptr = NULL;
    1133           0 :                 bdev_io->internal.f.has_buf = false;
    1134           0 :                 bdev_io->internal.get_aux_buf_cb(ch, bdev_io, buf);
    1135           0 :                 bdev_io->internal.get_aux_buf_cb = NULL;
    1136           0 :         } else {
    1137          42 :                 assert(bdev_io->internal.get_buf_cb != NULL);
    1138          42 :                 bdev_io->internal.get_buf_cb(ch, bdev_io, status);
    1139          42 :                 bdev_io->internal.get_buf_cb = NULL;
    1140             :         }
    1141          42 : }
    1142             : 
    1143             : static void
    1144           4 : _bdev_io_pull_buffer_cpl(void *ctx, int rc)
    1145             : {
    1146           4 :         struct spdk_bdev_io *bdev_io = ctx;
    1147             : 
    1148           4 :         if (rc) {
    1149           0 :                 SPDK_ERRLOG("Set bounce buffer failed with rc %d\n", rc);
    1150           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1151           0 :         }
    1152           4 :         bdev_io_get_buf_complete(bdev_io, !rc);
    1153           4 : }
    1154             : 
    1155             : static void
    1156           2 : bdev_io_pull_md_buf_done(void *ctx, int status)
    1157             : {
    1158           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1159           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1160             : 
    1161           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1162           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1163             : 
    1164           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1165           0 :                 bdev_ch_retry_io(ch);
    1166           0 :         }
    1167             : 
    1168           2 :         assert(bdev_io->internal.data_transfer_cpl);
    1169           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, status);
    1170           2 : }
    1171             : 
    1172             : static void
    1173           4 : bdev_io_pull_md_buf(struct spdk_bdev_io *bdev_io)
    1174             : {
    1175           4 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1176           4 :         int rc = 0;
    1177             : 
    1178           4 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1179           2 :                 assert(bdev_io->internal.f.has_bounce_buf);
    1180           2 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1181           2 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1182           2 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1183           4 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1184           2 :                                                           bdev_io->internal.memory_domain_ctx,
    1185           2 :                                                           &bdev_io->internal.bounce_buf.orig_md_iov, 1,
    1186           2 :                                                           &bdev_io->internal.bounce_buf.md_iov, 1,
    1187           2 :                                                           bdev_io_pull_md_buf_done, bdev_io);
    1188           2 :                         if (rc == 0) {
    1189             :                                 /* Continue to submit IO in completion callback */
    1190           2 :                                 return;
    1191             :                         }
    1192           0 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1193           0 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1194           0 :                         if (rc != -ENOMEM) {
    1195           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s, rc %d\n",
    1196             :                                             spdk_memory_domain_get_dma_device_id(
    1197             :                                                     bdev_io->internal.memory_domain), rc);
    1198           0 :                         }
    1199           0 :                 } else {
    1200           0 :                         memcpy(bdev_io->internal.bounce_buf.md_iov.iov_base,
    1201           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_base,
    1202           0 :                                bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1203             :                 }
    1204           0 :         }
    1205             : 
    1206           2 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1207           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL_MD);
    1208           0 :         } else {
    1209           2 :                 assert(bdev_io->internal.data_transfer_cpl);
    1210           2 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1211             :         }
    1212           4 : }
    1213             : 
    1214             : static void
    1215           4 : _bdev_io_pull_bounce_md_buf(struct spdk_bdev_io *bdev_io, void *md_buf, size_t len)
    1216             : {
    1217           4 :         assert(bdev_io->internal.f.has_bounce_buf);
    1218             : 
    1219             :         /* save original md_buf */
    1220           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = bdev_io->u.bdev.md_buf;
    1221           4 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_len = len;
    1222           4 :         bdev_io->internal.bounce_buf.md_iov.iov_base = md_buf;
    1223           4 :         bdev_io->internal.bounce_buf.md_iov.iov_len = len;
    1224             :         /* set bounce md_buf */
    1225           4 :         bdev_io->u.bdev.md_buf = md_buf;
    1226             : 
    1227           4 :         bdev_io_pull_md_buf(bdev_io);
    1228           4 : }
    1229             : 
    1230             : static void
    1231          42 : _bdev_io_set_md_buf(struct spdk_bdev_io *bdev_io)
    1232             : {
    1233          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1234             :         uint64_t md_len;
    1235             :         void *buf;
    1236             : 
    1237          42 :         if (spdk_bdev_is_md_separate(bdev)) {
    1238           7 :                 assert(!bdev_io_use_accel_sequence(bdev_io));
    1239             : 
    1240           7 :                 buf = (char *)bdev_io->u.bdev.iovs[0].iov_base + bdev_io->u.bdev.iovs[0].iov_len;
    1241           7 :                 md_len = bdev_io->u.bdev.num_blocks * bdev->md_len;
    1242             : 
    1243           7 :                 assert(((uintptr_t)buf & (spdk_bdev_get_buf_align(bdev) - 1)) == 0);
    1244             : 
    1245           7 :                 if (bdev_io->u.bdev.md_buf != NULL) {
    1246           4 :                         _bdev_io_pull_bounce_md_buf(bdev_io, buf, md_len);
    1247           4 :                         return;
    1248             :                 } else {
    1249           3 :                         spdk_bdev_io_set_md_buf(bdev_io, buf, md_len);
    1250             :                 }
    1251           3 :         }
    1252             : 
    1253          38 :         bdev_io_get_buf_complete(bdev_io, true);
    1254          42 : }
    1255             : 
    1256             : static inline void
    1257          26 : bdev_io_pull_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1258             : {
    1259          26 :         if (rc) {
    1260           0 :                 SPDK_ERRLOG("Failed to get data buffer\n");
    1261           0 :                 assert(bdev_io->internal.data_transfer_cpl);
    1262           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1263           0 :                 return;
    1264             :         }
    1265             : 
    1266          26 :         _bdev_io_set_md_buf(bdev_io);
    1267          26 : }
    1268             : 
    1269             : static void
    1270           2 : bdev_io_pull_data_done_and_track(void *ctx, int status)
    1271             : {
    1272           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1273           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1274             : 
    1275           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1276           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1277             : 
    1278           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1279           0 :                 bdev_ch_retry_io(ch);
    1280           0 :         }
    1281             : 
    1282           2 :         bdev_io_pull_data_done(bdev_io, status);
    1283           2 : }
    1284             : 
    1285             : static void
    1286          27 : bdev_io_pull_data(struct spdk_bdev_io *bdev_io)
    1287             : {
    1288          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1289          27 :         int rc = 0;
    1290             : 
    1291             :         /* If we need to exec an accel sequence or the IO uses a memory domain buffer and has a
    1292             :          * sequence, append a copy operation making accel change the src/dst buffers of the previous
    1293             :          * operation */
    1294          27 :         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io) ||
    1295          27 :             (bdev_io_use_accel_sequence(bdev_io) && bdev_io_use_memory_domain(bdev_io))) {
    1296           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1297           0 :                         assert(bdev_io_use_accel_sequence(bdev_io));
    1298           0 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1299           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1300           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1301             :                                                     NULL, NULL,
    1302           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1303           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1304           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1305           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1306             :                                                     NULL, NULL);
    1307           0 :                 } else {
    1308             :                         /* We need to reverse the src/dst for reads */
    1309           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1310           0 :                         assert(bdev_io_use_accel_sequence(bdev_io));
    1311           0 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1312           0 :                         rc = spdk_accel_append_copy(&bdev_io->internal.accel_sequence, ch->accel_channel,
    1313           0 :                                                     bdev_io->internal.bounce_buf.orig_iovs,
    1314           0 :                                                     bdev_io->internal.bounce_buf.orig_iovcnt,
    1315           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    1316           0 :                                                     bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    1317           0 :                                                     bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    1318             :                                                     NULL, NULL, NULL, NULL);
    1319             :                 }
    1320             : 
    1321           0 :                 if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    1322           0 :                         SPDK_ERRLOG("Failed to append copy to accel sequence: %p\n",
    1323             :                                     bdev_io->internal.accel_sequence);
    1324           0 :                 }
    1325          27 :         } else if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1326             :                 /* if this is write path, copy data from original buffer to bounce buffer */
    1327          17 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1328           3 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1329           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1330           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1331           6 :                         rc = spdk_memory_domain_pull_data(bdev_io->internal.memory_domain,
    1332           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1333           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1334           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1335           3 :                                                           bdev_io->u.bdev.iovs, 1,
    1336             :                                                           bdev_io_pull_data_done_and_track,
    1337           3 :                                                           bdev_io);
    1338           3 :                         if (rc == 0) {
    1339             :                                 /* Continue to submit IO in completion callback */
    1340           2 :                                 return;
    1341             :                         }
    1342           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1343           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1344           1 :                         if (rc != -ENOMEM) {
    1345           0 :                                 SPDK_ERRLOG("Failed to pull data from memory domain %s\n",
    1346             :                                             spdk_memory_domain_get_dma_device_id(
    1347             :                                                     bdev_io->internal.memory_domain));
    1348           0 :                         }
    1349           1 :                 } else {
    1350          14 :                         assert(bdev_io->u.bdev.iovcnt == 1);
    1351          14 :                         assert(bdev_io->internal.f.has_bounce_buf);
    1352          28 :                         spdk_copy_iovs_to_buf(bdev_io->u.bdev.iovs[0].iov_base,
    1353          14 :                                               bdev_io->u.bdev.iovs[0].iov_len,
    1354          14 :                                               bdev_io->internal.bounce_buf.orig_iovs,
    1355          14 :                                               bdev_io->internal.bounce_buf.orig_iovcnt);
    1356             :                 }
    1357          15 :         }
    1358             : 
    1359          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1360           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1361           1 :         } else {
    1362          24 :                 bdev_io_pull_data_done(bdev_io, rc);
    1363             :         }
    1364          27 : }
    1365             : 
    1366             : static void
    1367          26 : _bdev_io_pull_bounce_data_buf(struct spdk_bdev_io *bdev_io, void *buf, size_t len,
    1368             :                               bdev_copy_bounce_buffer_cpl cpl_cb)
    1369             : {
    1370          26 :         struct spdk_bdev_shared_resource *shared_resource = bdev_io->internal.ch->shared_resource;
    1371             : 
    1372          26 :         assert(bdev_io->internal.f.has_bounce_buf == false);
    1373             : 
    1374          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1375          26 :         bdev_io->internal.f.has_bounce_buf = true;
    1376             :         /* save original iovec */
    1377          26 :         bdev_io->internal.bounce_buf.orig_iovs = bdev_io->u.bdev.iovs;
    1378          26 :         bdev_io->internal.bounce_buf.orig_iovcnt = bdev_io->u.bdev.iovcnt;
    1379             :         /* zero the other data members */
    1380          26 :         bdev_io->internal.bounce_buf.iov.iov_base = NULL;
    1381          26 :         bdev_io->internal.bounce_buf.md_iov.iov_base = NULL;
    1382          26 :         bdev_io->internal.bounce_buf.orig_md_iov.iov_base = NULL;
    1383             :         /* set bounce iov */
    1384          26 :         bdev_io->u.bdev.iovs = &bdev_io->internal.bounce_buf.iov;
    1385          26 :         bdev_io->u.bdev.iovcnt = 1;
    1386             :         /* set bounce buffer for this operation */
    1387          26 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    1388          26 :         bdev_io->u.bdev.iovs[0].iov_len = len;
    1389             :         /* Now we use 1 iov, the split condition could have been changed */
    1390          26 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    1391             : 
    1392          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1393           0 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PULL);
    1394           0 :         } else {
    1395          26 :                 bdev_io_pull_data(bdev_io);
    1396             :         }
    1397          26 : }
    1398             : 
    1399             : static void
    1400          42 : _bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t len)
    1401             : {
    1402          42 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1403             :         bool buf_allocated;
    1404             :         uint64_t alignment;
    1405             :         void *aligned_buf;
    1406             : 
    1407          42 :         bdev_io->internal.buf.ptr = buf;
    1408          42 :         bdev_io->internal.f.has_buf = true;
    1409             : 
    1410          42 :         if (spdk_unlikely(bdev_io->internal.get_aux_buf_cb != NULL)) {
    1411           0 :                 bdev_io_get_buf_complete(bdev_io, true);
    1412           0 :                 return;
    1413             :         }
    1414             : 
    1415          42 :         alignment = spdk_bdev_get_buf_align(bdev);
    1416          42 :         buf_allocated = _is_buf_allocated(bdev_io->u.bdev.iovs);
    1417          42 :         aligned_buf = (void *)(((uintptr_t)buf + (alignment - 1)) & ~(alignment - 1));
    1418             : 
    1419          42 :         if (buf_allocated) {
    1420          26 :                 _bdev_io_pull_bounce_data_buf(bdev_io, aligned_buf, len, _bdev_io_pull_buffer_cpl);
    1421             :                 /* Continue in completion callback */
    1422          26 :                 return;
    1423             :         } else {
    1424          16 :                 spdk_bdev_io_set_buf(bdev_io, aligned_buf, len);
    1425             :         }
    1426             : 
    1427          16 :         _bdev_io_set_md_buf(bdev_io);
    1428          42 : }
    1429             : 
    1430             : static inline uint64_t
    1431          84 : bdev_io_get_max_buf_len(struct spdk_bdev_io *bdev_io, uint64_t len)
    1432             : {
    1433          84 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1434             :         uint64_t md_len, alignment;
    1435             : 
    1436          84 :         md_len = spdk_bdev_is_md_separate(bdev) ? bdev_io->u.bdev.num_blocks * bdev->md_len : 0;
    1437             : 
    1438             :         /* 1 byte alignment needs 0 byte of extra space, 64 bytes alignment needs 63 bytes of extra space, etc. */
    1439          84 :         alignment = spdk_bdev_get_buf_align(bdev) - 1;
    1440             : 
    1441          84 :         return len + alignment + md_len;
    1442             : }
    1443             : 
    1444             : static void
    1445          42 : _bdev_io_put_buf(struct spdk_bdev_io *bdev_io, void *buf, uint64_t buf_len)
    1446             : {
    1447             :         struct spdk_bdev_mgmt_channel *ch;
    1448             : 
    1449          42 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1450          42 :         spdk_iobuf_put(&ch->iobuf, buf, bdev_io_get_max_buf_len(bdev_io, buf_len));
    1451          42 : }
    1452             : 
    1453             : static void
    1454          42 : bdev_io_put_buf(struct spdk_bdev_io *bdev_io)
    1455             : {
    1456          42 :         assert(bdev_io->internal.f.has_buf);
    1457          42 :         _bdev_io_put_buf(bdev_io, bdev_io->internal.buf.ptr, bdev_io->internal.buf.len);
    1458          42 :         bdev_io->internal.buf.ptr = NULL;
    1459          42 :         bdev_io->internal.f.has_buf = false;
    1460          42 : }
    1461             : 
    1462           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_put_aux_buf,
    1463             :                               "spdk_bdev_io_put_aux_buf is deprecated", "v25.01", 0);
    1464             : 
    1465             : void
    1466           0 : spdk_bdev_io_put_aux_buf(struct spdk_bdev_io *bdev_io, void *buf)
    1467             : {
    1468           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    1469             : 
    1470           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_put_aux_buf);
    1471             : 
    1472           0 :         assert(buf != NULL);
    1473           0 :         _bdev_io_put_buf(bdev_io, buf, len);
    1474           0 : }
    1475             : 
    1476             : static inline void
    1477         548 : bdev_submit_request(struct spdk_bdev *bdev, struct spdk_io_channel *ioch,
    1478             :                     struct spdk_bdev_io *bdev_io)
    1479             : {
    1480             :         /* After a request is submitted to a bdev module, the ownership of an accel sequence
    1481             :          * associated with that bdev_io is transferred to the bdev module. So, clear the internal
    1482             :          * sequence pointer to make sure we won't touch it anymore. */
    1483        1014 :         if ((bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE ||
    1484         548 :              bdev_io->type == SPDK_BDEV_IO_TYPE_READ) && bdev_io->u.bdev.accel_sequence != NULL) {
    1485           0 :                 assert(!bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io));
    1486           0 :                 bdev_io->internal.f.has_accel_sequence = false;
    1487           0 :         }
    1488             : 
    1489         548 :         bdev->fn_table->submit_request(ioch, bdev_io);
    1490         548 : }
    1491             : 
    1492             : static inline void
    1493          10 : bdev_ch_resubmit_io(struct spdk_bdev_shared_resource *shared_resource, struct spdk_bdev_io *bdev_io)
    1494             : {
    1495          10 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1496             : 
    1497          10 :         bdev_io_increment_outstanding(bdev_io->internal.ch, shared_resource);
    1498          10 :         bdev_io->internal.error.nvme.cdw0 = 0;
    1499          10 :         bdev_io->num_retries++;
    1500          10 :         bdev_submit_request(bdev, spdk_bdev_io_get_io_channel(bdev_io), bdev_io);
    1501          10 : }
    1502             : 
    1503             : static void
    1504          63 : bdev_shared_ch_retry_io(struct spdk_bdev_shared_resource *shared_resource)
    1505             : {
    1506             :         struct spdk_bdev_io *bdev_io;
    1507             : 
    1508          63 :         if (shared_resource->io_outstanding > shared_resource->nomem_threshold) {
    1509             :                 /*
    1510             :                  * Allow some more I/O to complete before retrying the nomem_io queue.
    1511             :                  *  Some drivers (such as nvme) cannot immediately take a new I/O in
    1512             :                  *  the context of a completion, because the resources for the I/O are
    1513             :                  *  not released until control returns to the bdev poller.  Also, we
    1514             :                  *  may require several small I/O to complete before a larger I/O
    1515             :                  *  (that requires splitting) can be submitted.
    1516             :                  */
    1517          58 :                 return;
    1518             :         }
    1519             : 
    1520          16 :         while (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1521          12 :                 bdev_io = TAILQ_FIRST(&shared_resource->nomem_io);
    1522          12 :                 TAILQ_REMOVE(&shared_resource->nomem_io, bdev_io, internal.link);
    1523             : 
    1524          12 :                 switch (bdev_io->internal.retry_state) {
    1525             :                 case BDEV_IO_RETRY_STATE_SUBMIT:
    1526          10 :                         bdev_ch_resubmit_io(shared_resource, bdev_io);
    1527          10 :                         break;
    1528             :                 case BDEV_IO_RETRY_STATE_PULL:
    1529           1 :                         bdev_io_pull_data(bdev_io);
    1530           1 :                         break;
    1531             :                 case BDEV_IO_RETRY_STATE_PULL_MD:
    1532           0 :                         bdev_io_pull_md_buf(bdev_io);
    1533           0 :                         break;
    1534             :                 case BDEV_IO_RETRY_STATE_PUSH:
    1535           1 :                         bdev_io_push_bounce_data(bdev_io);
    1536           1 :                         break;
    1537             :                 case BDEV_IO_RETRY_STATE_PUSH_MD:
    1538           0 :                         bdev_io_push_bounce_md_buf(bdev_io);
    1539           0 :                         break;
    1540             :                 default:
    1541           0 :                         assert(0 && "invalid retry state");
    1542             :                         break;
    1543             :                 }
    1544             : 
    1545          12 :                 if (bdev_io == TAILQ_FIRST(&shared_resource->nomem_io)) {
    1546             :                         /* This IO completed again with NOMEM status, so break the loop and
    1547             :                          * don't try anymore.  Note that a bdev_io that fails with NOMEM
    1548             :                          * always gets requeued at the front of the list, to maintain
    1549             :                          * ordering.
    1550             :                          */
    1551           1 :                         break;
    1552             :                 }
    1553             :         }
    1554          63 : }
    1555             : 
    1556             : static void
    1557          63 : bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch)
    1558             : {
    1559          63 :         bdev_shared_ch_retry_io(bdev_ch->shared_resource);
    1560          63 : }
    1561             : 
    1562             : static int
    1563           0 : bdev_no_mem_poller(void *ctx)
    1564             : {
    1565           0 :         struct spdk_bdev_shared_resource *shared_resource = ctx;
    1566             : 
    1567           0 :         spdk_poller_unregister(&shared_resource->nomem_poller);
    1568             : 
    1569           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io)) {
    1570           0 :                 bdev_shared_ch_retry_io(shared_resource);
    1571           0 :         }
    1572             :         /* the retry cb may re-register the poller so double check */
    1573           0 :         if (!TAILQ_EMPTY(&shared_resource->nomem_io) &&
    1574           0 :             shared_resource->io_outstanding == 0 && shared_resource->nomem_poller == NULL) {
    1575             :                 /* No IOs were submitted, try again */
    1576           0 :                 shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1577             :                                                 SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1578           0 :         }
    1579             : 
    1580           0 :         return SPDK_POLLER_BUSY;
    1581             : }
    1582             : 
    1583             : static inline bool
    1584         556 : _bdev_io_handle_no_mem(struct spdk_bdev_io *bdev_io, enum bdev_io_retry_state state)
    1585             : {
    1586         556 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    1587         556 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    1588             : 
    1589         556 :         if (spdk_unlikely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM)) {
    1590           5 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    1591           5 :                 bdev_queue_nomem_io_head(shared_resource, bdev_io, state);
    1592             : 
    1593           5 :                 if (shared_resource->io_outstanding == 0 && !shared_resource->nomem_poller) {
    1594             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    1595             :                          * could trigger retry of queued IOs
    1596             :                          * Any IOs submitted may trigger retry of queued IOs. This poller handles a case when no
    1597             :                          * new IOs submitted, e.g. qd==1 */
    1598           0 :                         shared_resource->nomem_poller = SPDK_POLLER_REGISTER(bdev_no_mem_poller, shared_resource,
    1599             :                                                         SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * 10);
    1600           0 :                 }
    1601             :                 /* If bdev module completed an I/O that has an accel sequence with NOMEM status, the
    1602             :                  * ownership of that sequence is transferred back to the bdev layer, so we need to
    1603             :                  * restore internal.accel_sequence to make sure that the sequence is handled
    1604             :                  * correctly in case the I/O is later aborted. */
    1605           5 :                 if ((bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    1606           5 :                      bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) && bdev_io->u.bdev.accel_sequence) {
    1607           0 :                         assert(!bdev_io_use_accel_sequence(bdev_io));
    1608           0 :                         bdev_io->internal.f.has_accel_sequence = true;
    1609           0 :                         bdev_io->internal.accel_sequence = bdev_io->u.bdev.accel_sequence;
    1610           0 :                 }
    1611             : 
    1612           5 :                 return true;
    1613             :         }
    1614             : 
    1615         551 :         if (spdk_unlikely(!TAILQ_EMPTY(&shared_resource->nomem_io))) {
    1616          63 :                 bdev_ch_retry_io(bdev_ch);
    1617          63 :         }
    1618             : 
    1619         551 :         return false;
    1620         556 : }
    1621             : 
    1622             : static void
    1623          26 : _bdev_io_complete_push_bounce_done(void *ctx, int rc)
    1624             : {
    1625          26 :         struct spdk_bdev_io *bdev_io = ctx;
    1626          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1627             : 
    1628          26 :         if (rc) {
    1629           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1630           0 :         }
    1631             :         /* We want to free the bounce buffer here since we know we're done with it (as opposed
    1632             :          * to waiting for the conditional free of internal.buf.ptr in spdk_bdev_free_io()).
    1633             :          */
    1634          26 :         bdev_io_put_buf(bdev_io);
    1635             : 
    1636          26 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1637           0 :                 bdev_ch_retry_io(ch);
    1638           0 :         }
    1639             : 
    1640             :         /* Continue with IO completion flow */
    1641          26 :         bdev_io_complete(bdev_io);
    1642          26 : }
    1643             : 
    1644             : static void
    1645           2 : bdev_io_push_bounce_md_buf_done(void *ctx, int rc)
    1646             : {
    1647           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1648           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1649             : 
    1650           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1651           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1652           2 :         bdev_io->internal.f.has_bounce_buf = false;
    1653             : 
    1654           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1655           0 :                 bdev_ch_retry_io(ch);
    1656           0 :         }
    1657             : 
    1658           2 :         bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1659           2 : }
    1660             : 
    1661             : static inline void
    1662          26 : bdev_io_push_bounce_md_buf(struct spdk_bdev_io *bdev_io)
    1663             : {
    1664          26 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1665          26 :         int rc = 0;
    1666             : 
    1667          26 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1668          26 :         assert(bdev_io->internal.f.has_bounce_buf);
    1669             : 
    1670             :         /* do the same for metadata buffer */
    1671          26 :         if (spdk_unlikely(bdev_io->internal.bounce_buf.orig_md_iov.iov_base != NULL)) {
    1672           4 :                 assert(spdk_bdev_is_md_separate(bdev_io->bdev));
    1673             : 
    1674           4 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1675           2 :                         if (bdev_io_use_memory_domain(bdev_io)) {
    1676           2 :                                 TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1677           2 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    1678             :                                 /* If memory domain is used then we need to call async push function */
    1679           4 :                                 rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1680           2 :                                                                   bdev_io->internal.memory_domain_ctx,
    1681           2 :                                                                   &bdev_io->internal.bounce_buf.orig_md_iov,
    1682           2 :                                                                   (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1683           2 :                                                                   &bdev_io->internal.bounce_buf.md_iov, 1,
    1684             :                                                                   bdev_io_push_bounce_md_buf_done,
    1685           2 :                                                                   bdev_io);
    1686           2 :                                 if (rc == 0) {
    1687             :                                         /* Continue IO completion in async callback */
    1688           2 :                                         return;
    1689             :                                 }
    1690           0 :                                 TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1691           0 :                                 bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1692           0 :                                 if (rc != -ENOMEM) {
    1693           0 :                                         SPDK_ERRLOG("Failed to push md to memory domain %s\n",
    1694             :                                                     spdk_memory_domain_get_dma_device_id(
    1695             :                                                             bdev_io->internal.memory_domain));
    1696           0 :                                 }
    1697           0 :                         } else {
    1698           0 :                                 memcpy(bdev_io->internal.bounce_buf.orig_md_iov.iov_base, bdev_io->u.bdev.md_buf,
    1699           0 :                                        bdev_io->internal.bounce_buf.orig_md_iov.iov_len);
    1700             :                         }
    1701           0 :                 }
    1702           2 :         }
    1703             : 
    1704          24 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1705           0 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH_MD);
    1706           0 :         } else {
    1707          24 :                 assert(bdev_io->internal.data_transfer_cpl);
    1708          24 :                 bdev_io->internal.f.has_bounce_buf = false;
    1709          24 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1710             :         }
    1711          26 : }
    1712             : 
    1713             : static inline void
    1714          26 : bdev_io_push_bounce_data_done(struct spdk_bdev_io *bdev_io, int rc)
    1715             : {
    1716          26 :         assert(bdev_io->internal.data_transfer_cpl);
    1717          26 :         if (rc) {
    1718           0 :                 bdev_io->internal.data_transfer_cpl(bdev_io, rc);
    1719           0 :                 return;
    1720             :         }
    1721             : 
    1722             :         /* set original buffer for this io */
    1723          26 :         bdev_io->u.bdev.iovcnt = bdev_io->internal.bounce_buf.orig_iovcnt;
    1724          26 :         bdev_io->u.bdev.iovs = bdev_io->internal.bounce_buf.orig_iovs;
    1725             : 
    1726             :         /* We don't set bdev_io->internal.f.has_bounce_buf to false here because
    1727             :          * we still need to clear the md buf */
    1728             : 
    1729          26 :         bdev_io_push_bounce_md_buf(bdev_io);
    1730          26 : }
    1731             : 
    1732             : static void
    1733           2 : bdev_io_push_bounce_data_done_and_track(void *ctx, int status)
    1734             : {
    1735           2 :         struct spdk_bdev_io *bdev_io = ctx;
    1736           2 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1737             : 
    1738           2 :         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1739           2 :         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1740             : 
    1741           2 :         if (spdk_unlikely(!TAILQ_EMPTY(&ch->shared_resource->nomem_io))) {
    1742           0 :                 bdev_ch_retry_io(ch);
    1743           0 :         }
    1744             : 
    1745           2 :         bdev_io_push_bounce_data_done(bdev_io, status);
    1746           2 : }
    1747             : 
    1748             : static inline void
    1749          27 : bdev_io_push_bounce_data(struct spdk_bdev_io *bdev_io)
    1750             : {
    1751          27 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    1752          27 :         int rc = 0;
    1753             : 
    1754          27 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    1755          27 :         assert(!bdev_io_use_accel_sequence(bdev_io));
    1756          27 :         assert(bdev_io->internal.f.has_bounce_buf);
    1757             : 
    1758             :         /* if this is read path, copy data from bounce buffer to original buffer */
    1759          27 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
    1760          11 :                 if (bdev_io_use_memory_domain(bdev_io)) {
    1761           3 :                         TAILQ_INSERT_TAIL(&ch->io_memory_domain, bdev_io, internal.link);
    1762           3 :                         bdev_io_increment_outstanding(ch, ch->shared_resource);
    1763             :                         /* If memory domain is used then we need to call async push function */
    1764           6 :                         rc = spdk_memory_domain_push_data(bdev_io->internal.memory_domain,
    1765           3 :                                                           bdev_io->internal.memory_domain_ctx,
    1766           3 :                                                           bdev_io->internal.bounce_buf.orig_iovs,
    1767           3 :                                                           (uint32_t)bdev_io->internal.bounce_buf.orig_iovcnt,
    1768           3 :                                                           &bdev_io->internal.bounce_buf.iov, 1,
    1769             :                                                           bdev_io_push_bounce_data_done_and_track,
    1770           3 :                                                           bdev_io);
    1771           3 :                         if (rc == 0) {
    1772             :                                 /* Continue IO completion in async callback */
    1773           2 :                                 return;
    1774             :                         }
    1775             : 
    1776           1 :                         TAILQ_REMOVE(&ch->io_memory_domain, bdev_io, internal.link);
    1777           1 :                         bdev_io_decrement_outstanding(ch, ch->shared_resource);
    1778           1 :                         if (rc != -ENOMEM) {
    1779           0 :                                 SPDK_ERRLOG("Failed to push data to memory domain %s\n",
    1780             :                                             spdk_memory_domain_get_dma_device_id(
    1781             :                                                     bdev_io->internal.memory_domain));
    1782           0 :                         }
    1783           1 :                 } else {
    1784          16 :                         spdk_copy_buf_to_iovs(bdev_io->internal.bounce_buf.orig_iovs,
    1785           8 :                                               bdev_io->internal.bounce_buf.orig_iovcnt,
    1786           8 :                                               bdev_io->internal.bounce_buf.iov.iov_base,
    1787           8 :                                               bdev_io->internal.bounce_buf.iov.iov_len);
    1788             :                 }
    1789           9 :         }
    1790             : 
    1791          25 :         if (spdk_unlikely(rc == -ENOMEM)) {
    1792           1 :                 bdev_queue_nomem_io_head(ch->shared_resource, bdev_io, BDEV_IO_RETRY_STATE_PUSH);
    1793           1 :         } else {
    1794          24 :                 bdev_io_push_bounce_data_done(bdev_io, rc);
    1795             :         }
    1796          27 : }
    1797             : 
    1798             : static inline void
    1799          26 : _bdev_io_push_bounce_data_buffer(struct spdk_bdev_io *bdev_io, bdev_copy_bounce_buffer_cpl cpl_cb)
    1800             : {
    1801          26 :         bdev_io->internal.data_transfer_cpl = cpl_cb;
    1802          26 :         bdev_io_push_bounce_data(bdev_io);
    1803          26 : }
    1804             : 
    1805             : static void
    1806           0 : bdev_io_get_iobuf_cb(struct spdk_iobuf_entry *iobuf, void *buf)
    1807             : {
    1808             :         struct spdk_bdev_io *bdev_io;
    1809             : 
    1810           0 :         bdev_io = SPDK_CONTAINEROF(iobuf, struct spdk_bdev_io, internal.iobuf);
    1811           0 :         _bdev_io_set_buf(bdev_io, buf, bdev_io->internal.buf.len);
    1812           0 : }
    1813             : 
    1814             : static void
    1815          42 : bdev_io_get_buf(struct spdk_bdev_io *bdev_io, uint64_t len)
    1816             : {
    1817             :         struct spdk_bdev_mgmt_channel *mgmt_ch;
    1818             :         uint64_t max_len;
    1819             :         void *buf;
    1820             : 
    1821          42 :         assert(spdk_bdev_io_get_thread(bdev_io) == spdk_get_thread());
    1822          42 :         mgmt_ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    1823          42 :         max_len = bdev_io_get_max_buf_len(bdev_io, len);
    1824             : 
    1825          42 :         if (spdk_unlikely(max_len > mgmt_ch->iobuf.cache[0].large.bufsize)) {
    1826           0 :                 SPDK_ERRLOG("Length %" PRIu64 " is larger than allowed\n", max_len);
    1827           0 :                 bdev_io_get_buf_complete(bdev_io, false);
    1828           0 :                 return;
    1829             :         }
    1830             : 
    1831          42 :         bdev_io->internal.buf.len = len;
    1832          42 :         buf = spdk_iobuf_get(&mgmt_ch->iobuf, max_len, &bdev_io->internal.iobuf,
    1833             :                              bdev_io_get_iobuf_cb);
    1834          42 :         if (buf != NULL) {
    1835          42 :                 _bdev_io_set_buf(bdev_io, buf, len);
    1836          42 :         }
    1837          42 : }
    1838             : 
    1839             : void
    1840          56 : spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb, uint64_t len)
    1841             : {
    1842          56 :         struct spdk_bdev *bdev = bdev_io->bdev;
    1843             :         uint64_t alignment;
    1844             : 
    1845          56 :         assert(cb != NULL);
    1846          56 :         bdev_io->internal.get_buf_cb = cb;
    1847             : 
    1848          56 :         alignment = spdk_bdev_get_buf_align(bdev);
    1849             : 
    1850          56 :         if (_is_buf_allocated(bdev_io->u.bdev.iovs) &&
    1851          40 :             _are_iovs_aligned(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt, alignment)) {
    1852             :                 /* Buffer already present and aligned */
    1853          18 :                 cb(spdk_bdev_io_get_io_channel(bdev_io), bdev_io, true);
    1854          18 :                 return;
    1855             :         }
    1856             : 
    1857          38 :         bdev_io_get_buf(bdev_io, len);
    1858          56 : }
    1859             : 
    1860             : static void
    1861           4 : _bdev_memory_domain_get_io_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    1862             :                               bool success)
    1863             : {
    1864           4 :         if (!success) {
    1865           0 :                 SPDK_ERRLOG("Failed to get data buffer, completing IO\n");
    1866           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    1867           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    1868           0 :                 return;
    1869             :         }
    1870             : 
    1871           4 :         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    1872           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    1873           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    1874           0 :                         return;
    1875             :                 }
    1876             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    1877             :                  * clear out accel_sequence pointer and submit the IO */
    1878           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    1879           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    1880           0 :         }
    1881             : 
    1882           4 :         bdev_io_submit(bdev_io);
    1883           4 : }
    1884             : 
    1885             : static void
    1886           4 : _bdev_memory_domain_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb,
    1887             :                                uint64_t len)
    1888             : {
    1889           4 :         assert(cb != NULL);
    1890           4 :         bdev_io->internal.get_buf_cb = cb;
    1891             : 
    1892           4 :         bdev_io_get_buf(bdev_io, len);
    1893           4 : }
    1894             : 
    1895             : 
    1896           3 : SPDK_LOG_DEPRECATION_REGISTER(spdk_bdev_io_get_aux_buf,
    1897             :                               "spdk_bdev_io_get_aux_buf is deprecated", "v25.01", 0);
    1898             : 
    1899             : void
    1900           0 : spdk_bdev_io_get_aux_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_aux_buf_cb cb)
    1901             : {
    1902           0 :         uint64_t len = bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen;
    1903             : 
    1904           0 :         SPDK_LOG_DEPRECATED(spdk_bdev_io_get_aux_buf);
    1905             : 
    1906           0 :         assert(cb != NULL);
    1907           0 :         assert(bdev_io->internal.get_aux_buf_cb == NULL);
    1908           0 :         bdev_io->internal.get_aux_buf_cb = cb;
    1909           0 :         bdev_io_get_buf(bdev_io, len);
    1910           0 : }
    1911             : 
    1912             : static int
    1913          65 : bdev_module_get_max_ctx_size(void)
    1914             : {
    1915             :         struct spdk_bdev_module *bdev_module;
    1916          65 :         int max_bdev_module_size = 0;
    1917             : 
    1918         254 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    1919         189 :                 if (bdev_module->get_ctx_size && bdev_module->get_ctx_size() > max_bdev_module_size) {
    1920          64 :                         max_bdev_module_size = bdev_module->get_ctx_size();
    1921          64 :                 }
    1922         189 :         }
    1923             : 
    1924          65 :         return max_bdev_module_size;
    1925             : }
    1926             : 
    1927             : static void
    1928           0 : bdev_enable_histogram_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    1929             : {
    1930           0 :         if (!bdev->internal.histogram_enabled) {
    1931           0 :                 return;
    1932             :         }
    1933             : 
    1934           0 :         spdk_json_write_object_begin(w);
    1935           0 :         spdk_json_write_named_string(w, "method", "bdev_enable_histogram");
    1936             : 
    1937           0 :         spdk_json_write_named_object_begin(w, "params");
    1938           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    1939             : 
    1940           0 :         spdk_json_write_named_bool(w, "enable", bdev->internal.histogram_enabled);
    1941             : 
    1942           0 :         if (bdev->internal.histogram_io_type) {
    1943           0 :                 spdk_json_write_named_string(w, "opc",
    1944           0 :                                              spdk_bdev_get_io_type_name(bdev->internal.histogram_io_type));
    1945           0 :         }
    1946             : 
    1947           0 :         spdk_json_write_object_end(w);
    1948             : 
    1949           0 :         spdk_json_write_object_end(w);
    1950           0 : }
    1951             : 
    1952             : static void
    1953           0 : bdev_qos_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    1954             : {
    1955             :         int i;
    1956           0 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    1957             :         uint64_t limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES];
    1958             : 
    1959           0 :         if (!qos) {
    1960           0 :                 return;
    1961             :         }
    1962             : 
    1963           0 :         spdk_bdev_get_qos_rate_limits(bdev, limits);
    1964             : 
    1965           0 :         spdk_json_write_object_begin(w);
    1966           0 :         spdk_json_write_named_string(w, "method", "bdev_set_qos_limit");
    1967             : 
    1968           0 :         spdk_json_write_named_object_begin(w, "params");
    1969           0 :         spdk_json_write_named_string(w, "name", bdev->name);
    1970           0 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    1971           0 :                 if (limits[i] > 0) {
    1972           0 :                         spdk_json_write_named_uint64(w, qos_rpc_type[i], limits[i]);
    1973           0 :                 }
    1974           0 :         }
    1975           0 :         spdk_json_write_object_end(w);
    1976             : 
    1977           0 :         spdk_json_write_object_end(w);
    1978           0 : }
    1979             : 
    1980             : void
    1981           0 : spdk_bdev_subsystem_config_json(struct spdk_json_write_ctx *w)
    1982             : {
    1983             :         struct spdk_bdev_module *bdev_module;
    1984             :         struct spdk_bdev *bdev;
    1985             : 
    1986           0 :         assert(w != NULL);
    1987             : 
    1988           0 :         spdk_json_write_array_begin(w);
    1989             : 
    1990           0 :         spdk_json_write_object_begin(w);
    1991           0 :         spdk_json_write_named_string(w, "method", "bdev_set_options");
    1992           0 :         spdk_json_write_named_object_begin(w, "params");
    1993           0 :         spdk_json_write_named_uint32(w, "bdev_io_pool_size", g_bdev_opts.bdev_io_pool_size);
    1994           0 :         spdk_json_write_named_uint32(w, "bdev_io_cache_size", g_bdev_opts.bdev_io_cache_size);
    1995           0 :         spdk_json_write_named_bool(w, "bdev_auto_examine", g_bdev_opts.bdev_auto_examine);
    1996           0 :         spdk_json_write_named_uint32(w, "iobuf_small_cache_size", g_bdev_opts.iobuf_small_cache_size);
    1997           0 :         spdk_json_write_named_uint32(w, "iobuf_large_cache_size", g_bdev_opts.iobuf_large_cache_size);
    1998           0 :         spdk_json_write_object_end(w);
    1999           0 :         spdk_json_write_object_end(w);
    2000             : 
    2001           0 :         bdev_examine_allowlist_config_json(w);
    2002             : 
    2003           0 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2004           0 :                 if (bdev_module->config_json) {
    2005           0 :                         bdev_module->config_json(w);
    2006           0 :                 }
    2007           0 :         }
    2008             : 
    2009           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    2010             : 
    2011           0 :         TAILQ_FOREACH(bdev, &g_bdev_mgr.bdevs, internal.link) {
    2012           0 :                 if (bdev->fn_table->write_config_json) {
    2013           0 :                         bdev->fn_table->write_config_json(bdev, w);
    2014           0 :                 }
    2015             : 
    2016           0 :                 bdev_qos_config_json(bdev, w);
    2017           0 :                 bdev_enable_histogram_config_json(bdev, w);
    2018           0 :         }
    2019             : 
    2020           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    2021             : 
    2022             :         /* This has to be last RPC in array to make sure all bdevs finished examine */
    2023           0 :         spdk_json_write_object_begin(w);
    2024           0 :         spdk_json_write_named_string(w, "method", "bdev_wait_for_examine");
    2025           0 :         spdk_json_write_object_end(w);
    2026             : 
    2027           0 :         spdk_json_write_array_end(w);
    2028           0 : }
    2029             : 
    2030             : static void
    2031          71 : bdev_mgmt_channel_destroy(void *io_device, void *ctx_buf)
    2032             : {
    2033          71 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2034             :         struct spdk_bdev_io *bdev_io;
    2035             : 
    2036          71 :         spdk_iobuf_channel_fini(&ch->iobuf);
    2037             : 
    2038        9969 :         while (!STAILQ_EMPTY(&ch->per_thread_cache)) {
    2039        9898 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2040        9898 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2041        9898 :                 ch->per_thread_cache_count--;
    2042        9898 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2043             :         }
    2044             : 
    2045          71 :         assert(ch->per_thread_cache_count == 0);
    2046          71 : }
    2047             : 
    2048             : static int
    2049          71 : bdev_mgmt_channel_create(void *io_device, void *ctx_buf)
    2050             : {
    2051          71 :         struct spdk_bdev_mgmt_channel *ch = ctx_buf;
    2052             :         struct spdk_bdev_io *bdev_io;
    2053             :         uint32_t i;
    2054             :         int rc;
    2055             : 
    2056         142 :         rc = spdk_iobuf_channel_init(&ch->iobuf, "bdev",
    2057          71 :                                      g_bdev_opts.iobuf_small_cache_size,
    2058          71 :                                      g_bdev_opts.iobuf_large_cache_size);
    2059          71 :         if (rc != 0) {
    2060           0 :                 SPDK_ERRLOG("Failed to create iobuf channel: %s\n", spdk_strerror(-rc));
    2061           0 :                 return -1;
    2062             :         }
    2063             : 
    2064          71 :         STAILQ_INIT(&ch->per_thread_cache);
    2065          71 :         ch->bdev_io_cache_size = g_bdev_opts.bdev_io_cache_size;
    2066             : 
    2067             :         /* Pre-populate bdev_io cache to ensure this thread cannot be starved. */
    2068          71 :         ch->per_thread_cache_count = 0;
    2069        9969 :         for (i = 0; i < ch->bdev_io_cache_size; i++) {
    2070        9898 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2071        9898 :                 if (bdev_io == NULL) {
    2072           0 :                         SPDK_ERRLOG("You need to increase bdev_io_pool_size using bdev_set_options RPC.\n");
    2073           0 :                         assert(false);
    2074             :                         bdev_mgmt_channel_destroy(io_device, ctx_buf);
    2075             :                         return -1;
    2076             :                 }
    2077        9898 :                 ch->per_thread_cache_count++;
    2078        9898 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2079        9898 :         }
    2080             : 
    2081          71 :         TAILQ_INIT(&ch->shared_resources);
    2082          71 :         TAILQ_INIT(&ch->io_wait_queue);
    2083             : 
    2084          71 :         return 0;
    2085          71 : }
    2086             : 
    2087             : static void
    2088          65 : bdev_init_complete(int rc)
    2089             : {
    2090          65 :         spdk_bdev_init_cb cb_fn = g_init_cb_fn;
    2091          65 :         void *cb_arg = g_init_cb_arg;
    2092             :         struct spdk_bdev_module *m;
    2093             : 
    2094          65 :         g_bdev_mgr.init_complete = true;
    2095          65 :         g_init_cb_fn = NULL;
    2096          65 :         g_init_cb_arg = NULL;
    2097             : 
    2098             :         /*
    2099             :          * For modules that need to know when subsystem init is complete,
    2100             :          * inform them now.
    2101             :          */
    2102          65 :         if (rc == 0) {
    2103         254 :                 TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2104         189 :                         if (m->init_complete) {
    2105          23 :                                 m->init_complete();
    2106          23 :                         }
    2107         189 :                 }
    2108          65 :         }
    2109             : 
    2110          65 :         cb_fn(cb_arg, rc);
    2111          65 : }
    2112             : 
    2113             : static bool
    2114         257 : bdev_module_all_actions_completed(void)
    2115             : {
    2116             :         struct spdk_bdev_module *m;
    2117             : 
    2118        1017 :         TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2119         760 :                 if (m->internal.action_in_progress > 0) {
    2120           0 :                         return false;
    2121             :                 }
    2122         760 :         }
    2123         257 :         return true;
    2124         257 : }
    2125             : 
    2126             : static void
    2127         622 : bdev_module_action_complete(void)
    2128             : {
    2129             :         /*
    2130             :          * Don't finish bdev subsystem initialization if
    2131             :          * module pre-initialization is still in progress, or
    2132             :          * the subsystem been already initialized.
    2133             :          */
    2134         622 :         if (!g_bdev_mgr.module_init_complete || g_bdev_mgr.init_complete) {
    2135         557 :                 return;
    2136             :         }
    2137             : 
    2138             :         /*
    2139             :          * Check all bdev modules for inits/examinations in progress. If any
    2140             :          * exist, return immediately since we cannot finish bdev subsystem
    2141             :          * initialization until all are completed.
    2142             :          */
    2143          65 :         if (!bdev_module_all_actions_completed()) {
    2144           0 :                 return;
    2145             :         }
    2146             : 
    2147             :         /*
    2148             :          * Modules already finished initialization - now that all
    2149             :          * the bdev modules have finished their asynchronous I/O
    2150             :          * processing, the entire bdev layer can be marked as complete.
    2151             :          */
    2152          65 :         bdev_init_complete(0);
    2153         622 : }
    2154             : 
    2155             : static void
    2156         557 : bdev_module_action_done(struct spdk_bdev_module *module)
    2157             : {
    2158         557 :         spdk_spin_lock(&module->internal.spinlock);
    2159         557 :         assert(module->internal.action_in_progress > 0);
    2160         557 :         module->internal.action_in_progress--;
    2161         557 :         spdk_spin_unlock(&module->internal.spinlock);
    2162         557 :         bdev_module_action_complete();
    2163         557 : }
    2164             : 
    2165             : void
    2166          65 : spdk_bdev_module_init_done(struct spdk_bdev_module *module)
    2167             : {
    2168          65 :         assert(module->async_init);
    2169          65 :         bdev_module_action_done(module);
    2170          65 : }
    2171             : 
    2172             : void
    2173         492 : spdk_bdev_module_examine_done(struct spdk_bdev_module *module)
    2174             : {
    2175         492 :         bdev_module_action_done(module);
    2176         492 : }
    2177             : 
    2178             : /** The last initialized bdev module */
    2179             : static struct spdk_bdev_module *g_resume_bdev_module = NULL;
    2180             : 
    2181             : static void
    2182           0 : bdev_init_failed(void *cb_arg)
    2183             : {
    2184           0 :         struct spdk_bdev_module *module = cb_arg;
    2185             : 
    2186           0 :         spdk_spin_lock(&module->internal.spinlock);
    2187           0 :         assert(module->internal.action_in_progress > 0);
    2188           0 :         module->internal.action_in_progress--;
    2189           0 :         spdk_spin_unlock(&module->internal.spinlock);
    2190           0 :         bdev_init_complete(-1);
    2191           0 : }
    2192             : 
    2193             : static int
    2194          65 : bdev_modules_init(void)
    2195             : {
    2196             :         struct spdk_bdev_module *module;
    2197          65 :         int rc = 0;
    2198             : 
    2199         254 :         TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    2200         189 :                 g_resume_bdev_module = module;
    2201         189 :                 if (module->async_init) {
    2202          65 :                         spdk_spin_lock(&module->internal.spinlock);
    2203          65 :                         module->internal.action_in_progress = 1;
    2204          65 :                         spdk_spin_unlock(&module->internal.spinlock);
    2205          65 :                 }
    2206         189 :                 rc = module->module_init();
    2207         189 :                 if (rc != 0) {
    2208             :                         /* Bump action_in_progress to prevent other modules from completion of modules_init
    2209             :                          * Send message to defer application shutdown until resources are cleaned up */
    2210           0 :                         spdk_spin_lock(&module->internal.spinlock);
    2211           0 :                         module->internal.action_in_progress = 1;
    2212           0 :                         spdk_spin_unlock(&module->internal.spinlock);
    2213           0 :                         spdk_thread_send_msg(spdk_get_thread(), bdev_init_failed, module);
    2214           0 :                         return rc;
    2215             :                 }
    2216         189 :         }
    2217             : 
    2218          65 :         g_resume_bdev_module = NULL;
    2219          65 :         return 0;
    2220          65 : }
    2221             : 
    2222             : void
    2223          65 : spdk_bdev_initialize(spdk_bdev_init_cb cb_fn, void *cb_arg)
    2224             : {
    2225          65 :         int rc = 0;
    2226             :         char mempool_name[32];
    2227             : 
    2228          65 :         assert(cb_fn != NULL);
    2229             : 
    2230          65 :         g_init_cb_fn = cb_fn;
    2231          65 :         g_init_cb_arg = cb_arg;
    2232             : 
    2233          65 :         spdk_notify_type_register("bdev_register");
    2234          65 :         spdk_notify_type_register("bdev_unregister");
    2235             : 
    2236          65 :         snprintf(mempool_name, sizeof(mempool_name), "bdev_io_%d", getpid());
    2237             : 
    2238          65 :         rc = spdk_iobuf_register_module("bdev");
    2239          65 :         if (rc != 0) {
    2240           0 :                 SPDK_ERRLOG("could not register bdev iobuf module: %s\n", spdk_strerror(-rc));
    2241           0 :                 bdev_init_complete(-1);
    2242           0 :                 return;
    2243             :         }
    2244             : 
    2245         130 :         g_bdev_mgr.bdev_io_pool = spdk_mempool_create(mempool_name,
    2246          65 :                                   g_bdev_opts.bdev_io_pool_size,
    2247          65 :                                   sizeof(struct spdk_bdev_io) +
    2248          65 :                                   bdev_module_get_max_ctx_size(),
    2249             :                                   0,
    2250             :                                   SPDK_ENV_NUMA_ID_ANY);
    2251             : 
    2252          65 :         if (g_bdev_mgr.bdev_io_pool == NULL) {
    2253           0 :                 SPDK_ERRLOG("could not allocate spdk_bdev_io pool\n");
    2254           0 :                 bdev_init_complete(-1);
    2255           0 :                 return;
    2256             :         }
    2257             : 
    2258          65 :         g_bdev_mgr.zero_buffer = spdk_zmalloc(ZERO_BUFFER_SIZE, ZERO_BUFFER_SIZE,
    2259             :                                               NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
    2260          65 :         if (!g_bdev_mgr.zero_buffer) {
    2261           0 :                 SPDK_ERRLOG("create bdev zero buffer failed\n");
    2262           0 :                 bdev_init_complete(-1);
    2263           0 :                 return;
    2264             :         }
    2265             : 
    2266             : #ifdef SPDK_CONFIG_VTUNE
    2267             :         g_bdev_mgr.domain = __itt_domain_create("spdk_bdev");
    2268             : #endif
    2269             : 
    2270          65 :         spdk_io_device_register(&g_bdev_mgr, bdev_mgmt_channel_create,
    2271             :                                 bdev_mgmt_channel_destroy,
    2272             :                                 sizeof(struct spdk_bdev_mgmt_channel),
    2273             :                                 "bdev_mgr");
    2274             : 
    2275          65 :         rc = bdev_modules_init();
    2276          65 :         g_bdev_mgr.module_init_complete = true;
    2277          65 :         if (rc != 0) {
    2278           0 :                 SPDK_ERRLOG("bdev modules init failed\n");
    2279           0 :                 return;
    2280             :         }
    2281             : 
    2282          65 :         bdev_module_action_complete();
    2283          65 : }
    2284             : 
    2285             : static void
    2286          65 : bdev_mgr_unregister_cb(void *io_device)
    2287             : {
    2288          65 :         spdk_bdev_fini_cb cb_fn = g_fini_cb_fn;
    2289             : 
    2290          65 :         if (g_bdev_mgr.bdev_io_pool) {
    2291          65 :                 if (spdk_mempool_count(g_bdev_mgr.bdev_io_pool) != g_bdev_opts.bdev_io_pool_size) {
    2292           0 :                         SPDK_ERRLOG("bdev IO pool count is %zu but should be %u\n",
    2293             :                                     spdk_mempool_count(g_bdev_mgr.bdev_io_pool),
    2294             :                                     g_bdev_opts.bdev_io_pool_size);
    2295           0 :                 }
    2296             : 
    2297          65 :                 spdk_mempool_free(g_bdev_mgr.bdev_io_pool);
    2298          65 :         }
    2299             : 
    2300          65 :         spdk_free(g_bdev_mgr.zero_buffer);
    2301             : 
    2302          65 :         bdev_examine_allowlist_free();
    2303             : 
    2304          65 :         cb_fn(g_fini_cb_arg);
    2305          65 :         g_fini_cb_fn = NULL;
    2306          65 :         g_fini_cb_arg = NULL;
    2307          65 :         g_bdev_mgr.init_complete = false;
    2308          65 :         g_bdev_mgr.module_init_complete = false;
    2309          65 : }
    2310             : 
    2311             : static void
    2312          65 : bdev_module_fini_iter(void *arg)
    2313             : {
    2314             :         struct spdk_bdev_module *bdev_module;
    2315             : 
    2316             :         /* FIXME: Handling initialization failures is broken now,
    2317             :          * so we won't even try cleaning up after successfully
    2318             :          * initialized modules. if module_init_complete is false,
    2319             :          * just call spdk_bdev_mgr_unregister_cb
    2320             :          */
    2321          65 :         if (!g_bdev_mgr.module_init_complete) {
    2322           0 :                 bdev_mgr_unregister_cb(NULL);
    2323           0 :                 return;
    2324             :         }
    2325             : 
    2326             :         /* Start iterating from the last touched module */
    2327          65 :         if (!g_resume_bdev_module) {
    2328          65 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2329          65 :         } else {
    2330           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list,
    2331             :                                          internal.tailq);
    2332             :         }
    2333             : 
    2334         254 :         while (bdev_module) {
    2335         189 :                 if (bdev_module->async_fini) {
    2336             :                         /* Save our place so we can resume later. We must
    2337             :                          * save the variable here, before calling module_fini()
    2338             :                          * below, because in some cases the module may immediately
    2339             :                          * call spdk_bdev_module_fini_done() and re-enter
    2340             :                          * this function to continue iterating. */
    2341           0 :                         g_resume_bdev_module = bdev_module;
    2342           0 :                 }
    2343             : 
    2344         189 :                 if (bdev_module->module_fini) {
    2345         189 :                         bdev_module->module_fini();
    2346         189 :                 }
    2347             : 
    2348         189 :                 if (bdev_module->async_fini) {
    2349           0 :                         return;
    2350             :                 }
    2351             : 
    2352         189 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list,
    2353             :                                          internal.tailq);
    2354             :         }
    2355             : 
    2356          65 :         g_resume_bdev_module = NULL;
    2357          65 :         spdk_io_device_unregister(&g_bdev_mgr, bdev_mgr_unregister_cb);
    2358          65 : }
    2359             : 
    2360             : void
    2361           0 : spdk_bdev_module_fini_done(void)
    2362             : {
    2363           0 :         if (spdk_get_thread() != g_fini_thread) {
    2364           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_iter, NULL);
    2365           0 :         } else {
    2366           0 :                 bdev_module_fini_iter(NULL);
    2367             :         }
    2368           0 : }
    2369             : 
    2370             : static void
    2371          65 : bdev_finish_unregister_bdevs_iter(void *cb_arg, int bdeverrno)
    2372             : {
    2373          65 :         struct spdk_bdev *bdev = cb_arg;
    2374             : 
    2375          65 :         if (bdeverrno && bdev) {
    2376           0 :                 SPDK_WARNLOG("Unable to unregister bdev '%s' during spdk_bdev_finish()\n",
    2377             :                              bdev->name);
    2378             : 
    2379             :                 /*
    2380             :                  * Since the call to spdk_bdev_unregister() failed, we have no way to free this
    2381             :                  *  bdev; try to continue by manually removing this bdev from the list and continue
    2382             :                  *  with the next bdev in the list.
    2383             :                  */
    2384           0 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    2385           0 :         }
    2386             : 
    2387          65 :         if (TAILQ_EMPTY(&g_bdev_mgr.bdevs)) {
    2388          65 :                 SPDK_DEBUGLOG(bdev, "Done unregistering bdevs\n");
    2389             :                 /*
    2390             :                  * Bdev module finish need to be deferred as we might be in the middle of some context
    2391             :                  * (like bdev part free) that will use this bdev (or private bdev driver ctx data)
    2392             :                  * after returning.
    2393             :                  */
    2394          65 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_module_fini_iter, NULL);
    2395          65 :                 return;
    2396             :         }
    2397             : 
    2398             :         /*
    2399             :          * Unregister last unclaimed bdev in the list, to ensure that bdev subsystem
    2400             :          * shutdown proceeds top-down. The goal is to give virtual bdevs an opportunity
    2401             :          * to detect clean shutdown as opposed to run-time hot removal of the underlying
    2402             :          * base bdevs.
    2403             :          *
    2404             :          * Also, walk the list in the reverse order.
    2405             :          */
    2406           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2407           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2408           0 :                 spdk_spin_lock(&bdev->internal.spinlock);
    2409           0 :                 if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    2410           0 :                         LOG_ALREADY_CLAIMED_DEBUG("claimed, skipping", bdev);
    2411           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    2412           0 :                         continue;
    2413             :                 }
    2414           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    2415             : 
    2416           0 :                 SPDK_DEBUGLOG(bdev, "Unregistering bdev '%s'\n", bdev->name);
    2417           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2418           0 :                 return;
    2419             :         }
    2420             : 
    2421             :         /*
    2422             :          * If any bdev fails to unclaim underlying bdev properly, we may face the
    2423             :          * case of bdev list consisting of claimed bdevs only (if claims are managed
    2424             :          * correctly, this would mean there's a loop in the claims graph which is
    2425             :          * clearly impossible). Warn and unregister last bdev on the list then.
    2426             :          */
    2427           0 :         for (bdev = TAILQ_LAST(&g_bdev_mgr.bdevs, spdk_bdev_list);
    2428           0 :              bdev; bdev = TAILQ_PREV(bdev, spdk_bdev_list, internal.link)) {
    2429           0 :                 SPDK_WARNLOG("Unregistering claimed bdev '%s'!\n", bdev->name);
    2430           0 :                 spdk_bdev_unregister(bdev, bdev_finish_unregister_bdevs_iter, bdev);
    2431           0 :                 return;
    2432             :         }
    2433          65 : }
    2434             : 
    2435             : static void
    2436          65 : bdev_module_fini_start_iter(void *arg)
    2437             : {
    2438             :         struct spdk_bdev_module *bdev_module;
    2439             : 
    2440          65 :         if (!g_resume_bdev_module) {
    2441          65 :                 bdev_module = TAILQ_LAST(&g_bdev_mgr.bdev_modules, bdev_module_list);
    2442          65 :         } else {
    2443           0 :                 bdev_module = TAILQ_PREV(g_resume_bdev_module, bdev_module_list, internal.tailq);
    2444             :         }
    2445             : 
    2446         254 :         while (bdev_module) {
    2447         189 :                 if (bdev_module->async_fini_start) {
    2448             :                         /* Save our place so we can resume later. We must
    2449             :                          * save the variable here, before calling fini_start()
    2450             :                          * below, because in some cases the module may immediately
    2451             :                          * call spdk_bdev_module_fini_start_done() and re-enter
    2452             :                          * this function to continue iterating. */
    2453           0 :                         g_resume_bdev_module = bdev_module;
    2454           0 :                 }
    2455             : 
    2456         189 :                 if (bdev_module->fini_start) {
    2457          23 :                         bdev_module->fini_start();
    2458          23 :                 }
    2459             : 
    2460         189 :                 if (bdev_module->async_fini_start) {
    2461           0 :                         return;
    2462             :                 }
    2463             : 
    2464         189 :                 bdev_module = TAILQ_PREV(bdev_module, bdev_module_list, internal.tailq);
    2465             :         }
    2466             : 
    2467          65 :         g_resume_bdev_module = NULL;
    2468             : 
    2469          65 :         bdev_finish_unregister_bdevs_iter(NULL, 0);
    2470          65 : }
    2471             : 
    2472             : void
    2473           0 : spdk_bdev_module_fini_start_done(void)
    2474             : {
    2475           0 :         if (spdk_get_thread() != g_fini_thread) {
    2476           0 :                 spdk_thread_send_msg(g_fini_thread, bdev_module_fini_start_iter, NULL);
    2477           0 :         } else {
    2478           0 :                 bdev_module_fini_start_iter(NULL);
    2479             :         }
    2480           0 : }
    2481             : 
    2482             : static void
    2483          65 : bdev_finish_wait_for_examine_done(void *cb_arg)
    2484             : {
    2485          65 :         bdev_module_fini_start_iter(NULL);
    2486          65 : }
    2487             : 
    2488             : static void bdev_open_async_fini(void);
    2489             : 
    2490             : void
    2491          65 : spdk_bdev_finish(spdk_bdev_fini_cb cb_fn, void *cb_arg)
    2492             : {
    2493             :         int rc;
    2494             : 
    2495          65 :         assert(cb_fn != NULL);
    2496             : 
    2497          65 :         g_fini_thread = spdk_get_thread();
    2498             : 
    2499          65 :         g_fini_cb_fn = cb_fn;
    2500          65 :         g_fini_cb_arg = cb_arg;
    2501             : 
    2502          65 :         bdev_open_async_fini();
    2503             : 
    2504          65 :         rc = spdk_bdev_wait_for_examine(bdev_finish_wait_for_examine_done, NULL);
    2505          65 :         if (rc != 0) {
    2506           0 :                 SPDK_ERRLOG("wait_for_examine failed: %s\n", spdk_strerror(-rc));
    2507           0 :                 bdev_finish_wait_for_examine_done(NULL);
    2508           0 :         }
    2509          65 : }
    2510             : 
    2511             : struct spdk_bdev_io *
    2512         697 : bdev_channel_get_io(struct spdk_bdev_channel *channel)
    2513             : {
    2514         697 :         struct spdk_bdev_mgmt_channel *ch = channel->shared_resource->mgmt_ch;
    2515             :         struct spdk_bdev_io *bdev_io;
    2516             : 
    2517         697 :         if (ch->per_thread_cache_count > 0) {
    2518         637 :                 bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
    2519         637 :                 STAILQ_REMOVE_HEAD(&ch->per_thread_cache, internal.buf_link);
    2520         637 :                 ch->per_thread_cache_count--;
    2521         697 :         } else if (spdk_unlikely(!TAILQ_EMPTY(&ch->io_wait_queue))) {
    2522             :                 /*
    2523             :                  * Don't try to look for bdev_ios in the global pool if there are
    2524             :                  * waiters on bdev_ios - we don't want this caller to jump the line.
    2525             :                  */
    2526           0 :                 bdev_io = NULL;
    2527           0 :         } else {
    2528          60 :                 bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
    2529             :         }
    2530             : 
    2531         697 :         return bdev_io;
    2532             : }
    2533             : 
    2534             : void
    2535         691 : spdk_bdev_free_io(struct spdk_bdev_io *bdev_io)
    2536             : {
    2537             :         struct spdk_bdev_mgmt_channel *ch;
    2538             : 
    2539         691 :         assert(bdev_io != NULL);
    2540         691 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING);
    2541             : 
    2542         691 :         ch = bdev_io->internal.ch->shared_resource->mgmt_ch;
    2543             : 
    2544         691 :         if (bdev_io->internal.f.has_buf) {
    2545          16 :                 bdev_io_put_buf(bdev_io);
    2546          16 :         }
    2547             : 
    2548         691 :         if (ch->per_thread_cache_count < ch->bdev_io_cache_size) {
    2549         637 :                 ch->per_thread_cache_count++;
    2550         637 :                 STAILQ_INSERT_HEAD(&ch->per_thread_cache, bdev_io, internal.buf_link);
    2551         641 :                 while (ch->per_thread_cache_count > 0 && !TAILQ_EMPTY(&ch->io_wait_queue)) {
    2552             :                         struct spdk_bdev_io_wait_entry *entry;
    2553             : 
    2554           4 :                         entry = TAILQ_FIRST(&ch->io_wait_queue);
    2555           4 :                         TAILQ_REMOVE(&ch->io_wait_queue, entry, link);
    2556           4 :                         entry->cb_fn(entry->cb_arg);
    2557             :                 }
    2558         637 :         } else {
    2559             :                 /* We should never have a full cache with entries on the io wait queue. */
    2560          54 :                 assert(TAILQ_EMPTY(&ch->io_wait_queue));
    2561          54 :                 spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
    2562             :         }
    2563         691 : }
    2564             : 
    2565             : static bool
    2566          72 : bdev_qos_is_iops_rate_limit(enum spdk_bdev_qos_rate_limit_type limit)
    2567             : {
    2568          72 :         assert(limit != SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    2569             : 
    2570          72 :         switch (limit) {
    2571             :         case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2572          18 :                 return true;
    2573             :         case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2574             :         case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2575             :         case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2576          54 :                 return false;
    2577           0 :         case SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES:
    2578             :         default:
    2579           0 :                 return false;
    2580             :         }
    2581          72 : }
    2582             : 
    2583             : static bool
    2584          25 : bdev_qos_io_to_limit(struct spdk_bdev_io *bdev_io)
    2585             : {
    2586          25 :         switch (bdev_io->type) {
    2587             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2588             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2589             :         case SPDK_BDEV_IO_TYPE_READ:
    2590             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2591          23 :                 return true;
    2592             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2593           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2594           0 :                         return true;
    2595             :                 } else {
    2596           0 :                         return false;
    2597             :                 }
    2598             :         default:
    2599           2 :                 return false;
    2600             :         }
    2601          25 : }
    2602             : 
    2603             : static bool
    2604          33 : bdev_is_read_io(struct spdk_bdev_io *bdev_io)
    2605             : {
    2606          33 :         switch (bdev_io->type) {
    2607             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2608             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2609             :                 /* Bit 1 (0x2) set for read operation */
    2610           0 :                 if (bdev_io->u.nvme_passthru.cmd.opc & SPDK_NVME_OPC_READ) {
    2611           0 :                         return true;
    2612             :                 } else {
    2613           0 :                         return false;
    2614             :                 }
    2615             :         case SPDK_BDEV_IO_TYPE_READ:
    2616          30 :                 return true;
    2617             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2618             :                 /* Populate to read from disk */
    2619           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    2620           0 :                         return true;
    2621             :                 } else {
    2622           0 :                         return false;
    2623             :                 }
    2624             :         default:
    2625           3 :                 return false;
    2626             :         }
    2627          33 : }
    2628             : 
    2629             : static uint64_t
    2630          43 : bdev_get_io_size_in_byte(struct spdk_bdev_io *bdev_io)
    2631             : {
    2632          43 :         struct spdk_bdev        *bdev = bdev_io->bdev;
    2633             : 
    2634          43 :         switch (bdev_io->type) {
    2635             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    2636             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    2637           0 :                 return bdev_io->u.nvme_passthru.nbytes;
    2638             :         case SPDK_BDEV_IO_TYPE_READ:
    2639             :         case SPDK_BDEV_IO_TYPE_WRITE:
    2640          43 :                 return bdev_io->u.bdev.num_blocks * bdev->blocklen;
    2641             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    2642             :                 /* Track the data in the start phase only */
    2643           0 :                 if (bdev_io->u.bdev.zcopy.start) {
    2644           0 :                         return bdev_io->u.bdev.num_blocks * bdev->blocklen;
    2645             :                 } else {
    2646           0 :                         return 0;
    2647             :                 }
    2648             :         default:
    2649           0 :                 return 0;
    2650             :         }
    2651          43 : }
    2652             : 
    2653             : static inline bool
    2654          64 : bdev_qos_rw_queue_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2655             : {
    2656             :         int64_t remaining_this_timeslice;
    2657             : 
    2658          64 :         if (!limit->max_per_timeslice) {
    2659             :                 /* The QoS is disabled */
    2660           0 :                 return false;
    2661             :         }
    2662             : 
    2663          64 :         remaining_this_timeslice = __atomic_sub_fetch(&limit->remaining_this_timeslice, delta,
    2664             :                                    __ATOMIC_RELAXED);
    2665          64 :         if (remaining_this_timeslice + (int64_t)delta > 0) {
    2666             :                 /* There was still a quota for this delta -> the IO shouldn't be queued
    2667             :                  *
    2668             :                  * We allow a slight quota overrun here so an IO bigger than the per-timeslice
    2669             :                  * quota can be allowed once a while. Such overrun then taken into account in
    2670             :                  * the QoS poller, where the next timeslice quota is calculated.
    2671             :                  */
    2672          59 :                 return false;
    2673             :         }
    2674             : 
    2675             :         /* There was no quota for this delta -> the IO should be queued
    2676             :          * The remaining_this_timeslice must be rewinded so it reflects the real
    2677             :          * amount of IOs or bytes allowed.
    2678             :          */
    2679           5 :         __atomic_add_fetch(
    2680           5 :                 &limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2681           5 :         return true;
    2682          64 : }
    2683             : 
    2684             : static inline void
    2685           5 : bdev_qos_rw_rewind_io(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io, uint64_t delta)
    2686             : {
    2687           5 :         __atomic_add_fetch(&limit->remaining_this_timeslice, delta, __ATOMIC_RELAXED);
    2688           5 : }
    2689             : 
    2690             : static bool
    2691          23 : bdev_qos_rw_iops_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2692             : {
    2693          23 :         return bdev_qos_rw_queue_io(limit, io, 1);
    2694             : }
    2695             : 
    2696             : static void
    2697           3 : bdev_qos_rw_iops_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2698             : {
    2699           3 :         bdev_qos_rw_rewind_io(limit, io, 1);
    2700           3 : }
    2701             : 
    2702             : static bool
    2703          41 : bdev_qos_rw_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2704             : {
    2705          41 :         return bdev_qos_rw_queue_io(limit, io, bdev_get_io_size_in_byte(io));
    2706             : }
    2707             : 
    2708             : static void
    2709           2 : bdev_qos_rw_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2710             : {
    2711           2 :         bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2712           2 : }
    2713             : 
    2714             : static bool
    2715          19 : bdev_qos_r_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2716             : {
    2717          19 :         if (bdev_is_read_io(io) == false) {
    2718           1 :                 return false;
    2719             :         }
    2720             : 
    2721          18 :         return bdev_qos_rw_bps_queue(limit, io);
    2722          19 : }
    2723             : 
    2724             : static void
    2725           0 : bdev_qos_r_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2726             : {
    2727           0 :         if (bdev_is_read_io(io) != false) {
    2728           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2729           0 :         }
    2730           0 : }
    2731             : 
    2732             : static bool
    2733          14 : bdev_qos_w_bps_queue(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2734             : {
    2735          14 :         if (bdev_is_read_io(io) == true) {
    2736          12 :                 return false;
    2737             :         }
    2738             : 
    2739           2 :         return bdev_qos_rw_bps_queue(limit, io);
    2740          14 : }
    2741             : 
    2742             : static void
    2743           0 : bdev_qos_w_bps_rewind_quota(struct spdk_bdev_qos_limit *limit, struct spdk_bdev_io *io)
    2744             : {
    2745           0 :         if (bdev_is_read_io(io) != true) {
    2746           0 :                 bdev_qos_rw_rewind_io(limit, io, bdev_get_io_size_in_byte(io));
    2747           0 :         }
    2748           0 : }
    2749             : 
    2750             : static void
    2751          10 : bdev_qos_set_ops(struct spdk_bdev_qos *qos)
    2752             : {
    2753             :         int i;
    2754             : 
    2755          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2756          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    2757          15 :                         qos->rate_limits[i].queue_io = NULL;
    2758          15 :                         continue;
    2759             :                 }
    2760             : 
    2761          25 :                 switch (i) {
    2762             :                 case SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT:
    2763           9 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_iops_queue;
    2764           9 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_iops_rewind_quota;
    2765           9 :                         break;
    2766             :                 case SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT:
    2767           7 :                         qos->rate_limits[i].queue_io = bdev_qos_rw_bps_queue;
    2768           7 :                         qos->rate_limits[i].rewind_quota = bdev_qos_rw_bps_rewind_quota;
    2769           7 :                         break;
    2770             :                 case SPDK_BDEV_QOS_R_BPS_RATE_LIMIT:
    2771           5 :                         qos->rate_limits[i].queue_io = bdev_qos_r_bps_queue;
    2772           5 :                         qos->rate_limits[i].rewind_quota = bdev_qos_r_bps_rewind_quota;
    2773           5 :                         break;
    2774             :                 case SPDK_BDEV_QOS_W_BPS_RATE_LIMIT:
    2775           4 :                         qos->rate_limits[i].queue_io = bdev_qos_w_bps_queue;
    2776           4 :                         qos->rate_limits[i].rewind_quota = bdev_qos_w_bps_rewind_quota;
    2777           4 :                         break;
    2778             :                 default:
    2779           0 :                         break;
    2780             :                 }
    2781          25 :         }
    2782          10 : }
    2783             : 
    2784             : static void
    2785           6 : _bdev_io_complete_in_submit(struct spdk_bdev_channel *bdev_ch,
    2786             :                             struct spdk_bdev_io *bdev_io,
    2787             :                             enum spdk_bdev_io_status status)
    2788             : {
    2789           6 :         bdev_io->internal.f.in_submit_request = true;
    2790           6 :         bdev_io_increment_outstanding(bdev_ch, bdev_ch->shared_resource);
    2791           6 :         spdk_bdev_io_complete(bdev_io, status);
    2792           6 :         bdev_io->internal.f.in_submit_request = false;
    2793           6 : }
    2794             : 
    2795             : static inline void
    2796         574 : bdev_io_do_submit(struct spdk_bdev_channel *bdev_ch, struct spdk_bdev_io *bdev_io)
    2797             : {
    2798         574 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2799         574 :         struct spdk_io_channel *ch = bdev_ch->channel;
    2800         574 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    2801             : 
    2802         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    2803          16 :                 struct spdk_bdev_mgmt_channel *mgmt_channel = shared_resource->mgmt_ch;
    2804          16 :                 struct spdk_bdev_io *bio_to_abort = bdev_io->u.abort.bio_to_abort;
    2805             : 
    2806          16 :                 if (bdev_abort_queued_io(&shared_resource->nomem_io, bio_to_abort) ||
    2807          16 :                     bdev_abort_buf_io(mgmt_channel, bio_to_abort)) {
    2808           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io,
    2809             :                                                     SPDK_BDEV_IO_STATUS_SUCCESS);
    2810           0 :                         return;
    2811             :                 }
    2812          16 :         }
    2813             : 
    2814         574 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE &&
    2815             :                           bdev_io->bdev->split_on_write_unit &&
    2816             :                           bdev_io->u.bdev.num_blocks < bdev_io->bdev->write_unit_size)) {
    2817           4 :                 SPDK_ERRLOG("IO num_blocks %lu does not match the write_unit_size %u\n",
    2818             :                             bdev_io->u.bdev.num_blocks, bdev_io->bdev->write_unit_size);
    2819           4 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    2820           4 :                 return;
    2821             :         }
    2822             : 
    2823         570 :         if (spdk_likely(TAILQ_EMPTY(&shared_resource->nomem_io))) {
    2824         527 :                 bdev_io_increment_outstanding(bdev_ch, shared_resource);
    2825         527 :                 bdev_io->internal.f.in_submit_request = true;
    2826         527 :                 bdev_submit_request(bdev, ch, bdev_io);
    2827         527 :                 bdev_io->internal.f.in_submit_request = false;
    2828         527 :         } else {
    2829          43 :                 bdev_queue_nomem_io_tail(shared_resource, bdev_io, BDEV_IO_RETRY_STATE_SUBMIT);
    2830          43 :                 if (shared_resource->nomem_threshold == 0 && shared_resource->io_outstanding == 0) {
    2831             :                         /* Special case when we have nomem IOs and no outstanding IOs which completions
    2832             :                          * could trigger retry of queued IOs */
    2833           0 :                         bdev_shared_ch_retry_io(shared_resource);
    2834           0 :                 }
    2835             :         }
    2836         574 : }
    2837             : 
    2838             : static bool
    2839          25 : bdev_qos_queue_io(struct spdk_bdev_qos *qos, struct spdk_bdev_io *bdev_io)
    2840             : {
    2841             :         int i;
    2842             : 
    2843          25 :         if (bdev_qos_io_to_limit(bdev_io) == true) {
    2844         100 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    2845          82 :                         if (!qos->rate_limits[i].queue_io) {
    2846           5 :                                 continue;
    2847             :                         }
    2848             : 
    2849         231 :                         if (qos->rate_limits[i].queue_io(&qos->rate_limits[i],
    2850         154 :                                                          bdev_io) == true) {
    2851          10 :                                 for (i -= 1; i >= 0 ; i--) {
    2852           5 :                                         if (!qos->rate_limits[i].queue_io) {
    2853           0 :                                                 continue;
    2854             :                                         }
    2855             : 
    2856           5 :                                         qos->rate_limits[i].rewind_quota(&qos->rate_limits[i], bdev_io);
    2857           5 :                                 }
    2858           5 :                                 return true;
    2859             :                         }
    2860          72 :                 }
    2861          18 :         }
    2862             : 
    2863          20 :         return false;
    2864          25 : }
    2865             : 
    2866             : static int
    2867          27 : bdev_qos_io_submit(struct spdk_bdev_channel *ch, struct spdk_bdev_qos *qos)
    2868             : {
    2869          27 :         struct spdk_bdev_io             *bdev_io = NULL, *tmp = NULL;
    2870          27 :         int                             submitted_ios = 0;
    2871             : 
    2872          52 :         TAILQ_FOREACH_SAFE(bdev_io, &ch->qos_queued_io, internal.link, tmp) {
    2873          25 :                 if (!bdev_qos_queue_io(qos, bdev_io)) {
    2874          20 :                         TAILQ_REMOVE(&ch->qos_queued_io, bdev_io, internal.link);
    2875          20 :                         bdev_io_do_submit(ch, bdev_io);
    2876             : 
    2877          20 :                         submitted_ios++;
    2878          20 :                 }
    2879          25 :         }
    2880             : 
    2881          27 :         return submitted_ios;
    2882             : }
    2883             : 
    2884             : static void
    2885           2 : bdev_queue_io_wait_with_cb(struct spdk_bdev_io *bdev_io, spdk_bdev_io_wait_cb cb_fn)
    2886             : {
    2887             :         int rc;
    2888             : 
    2889           2 :         bdev_io->internal.waitq_entry.bdev = bdev_io->bdev;
    2890           2 :         bdev_io->internal.waitq_entry.cb_fn = cb_fn;
    2891           2 :         bdev_io->internal.waitq_entry.cb_arg = bdev_io;
    2892           4 :         rc = spdk_bdev_queue_io_wait(bdev_io->bdev, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    2893           2 :                                      &bdev_io->internal.waitq_entry);
    2894           2 :         if (rc != 0) {
    2895           0 :                 SPDK_ERRLOG("Queue IO failed, rc=%d\n", rc);
    2896           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    2897           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    2898           0 :         }
    2899           2 : }
    2900             : 
    2901             : static bool
    2902         621 : bdev_rw_should_split(struct spdk_bdev_io *bdev_io)
    2903             : {
    2904             :         uint32_t io_boundary;
    2905         621 :         struct spdk_bdev *bdev = bdev_io->bdev;
    2906         621 :         uint32_t max_segment_size = bdev->max_segment_size;
    2907         621 :         uint32_t max_size = bdev->max_rw_size;
    2908         621 :         int max_segs = bdev->max_num_segments;
    2909             : 
    2910         621 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    2911          24 :                 io_boundary = bdev->write_unit_size;
    2912         621 :         } else if (bdev->split_on_optimal_io_boundary) {
    2913         168 :                 io_boundary = bdev->optimal_io_boundary;
    2914         168 :         } else {
    2915         429 :                 io_boundary = 0;
    2916             :         }
    2917             : 
    2918         621 :         if (spdk_likely(!io_boundary && !max_segs && !max_segment_size && !max_size)) {
    2919         243 :                 return false;
    2920             :         }
    2921             : 
    2922         378 :         if (io_boundary) {
    2923             :                 uint64_t start_stripe, end_stripe;
    2924             : 
    2925         192 :                 start_stripe = bdev_io->u.bdev.offset_blocks;
    2926         192 :                 end_stripe = start_stripe + bdev_io->u.bdev.num_blocks - 1;
    2927             :                 /* Avoid expensive div operations if possible.  These spdk_u32 functions are very cheap. */
    2928         192 :                 if (spdk_likely(spdk_u32_is_pow2(io_boundary))) {
    2929         192 :                         start_stripe >>= spdk_u32log2(io_boundary);
    2930         192 :                         end_stripe >>= spdk_u32log2(io_boundary);
    2931         192 :                 } else {
    2932           0 :                         start_stripe /= io_boundary;
    2933           0 :                         end_stripe /= io_boundary;
    2934             :                 }
    2935             : 
    2936         192 :                 if (start_stripe != end_stripe) {
    2937          75 :                         return true;
    2938             :                 }
    2939         117 :         }
    2940             : 
    2941         303 :         if (max_segs) {
    2942         150 :                 if (bdev_io->u.bdev.iovcnt > max_segs) {
    2943          15 :                         return true;
    2944             :                 }
    2945         135 :         }
    2946             : 
    2947         288 :         if (max_segment_size) {
    2948         470 :                 for (int i = 0; i < bdev_io->u.bdev.iovcnt; i++) {
    2949         346 :                         if (bdev_io->u.bdev.iovs[i].iov_len > max_segment_size) {
    2950          12 :                                 return true;
    2951             :                         }
    2952         334 :                 }
    2953         124 :         }
    2954             : 
    2955         276 :         if (max_size) {
    2956          52 :                 if (bdev_io->u.bdev.num_blocks > max_size) {
    2957           7 :                         return true;
    2958             :                 }
    2959          45 :         }
    2960             : 
    2961         269 :         return false;
    2962         621 : }
    2963             : 
    2964             : static bool
    2965          24 : bdev_unmap_should_split(struct spdk_bdev_io *bdev_io)
    2966             : {
    2967             :         uint32_t num_unmap_segments;
    2968             : 
    2969          24 :         if (!bdev_io->bdev->max_unmap || !bdev_io->bdev->max_unmap_segments) {
    2970           3 :                 return false;
    2971             :         }
    2972          21 :         num_unmap_segments = spdk_divide_round_up(bdev_io->u.bdev.num_blocks, bdev_io->bdev->max_unmap);
    2973          21 :         if (num_unmap_segments > bdev_io->bdev->max_unmap_segments) {
    2974           4 :                 return true;
    2975             :         }
    2976             : 
    2977          17 :         return false;
    2978          24 : }
    2979             : 
    2980             : static bool
    2981          37 : bdev_write_zeroes_should_split(struct spdk_bdev_io *bdev_io)
    2982             : {
    2983          37 :         if (!bdev_io->bdev->max_write_zeroes) {
    2984           4 :                 return false;
    2985             :         }
    2986             : 
    2987          33 :         if (bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_write_zeroes) {
    2988          10 :                 return true;
    2989             :         }
    2990             : 
    2991          23 :         return false;
    2992          37 : }
    2993             : 
    2994             : static bool
    2995          30 : bdev_copy_should_split(struct spdk_bdev_io *bdev_io)
    2996             : {
    2997          30 :         if (bdev_io->bdev->max_copy != 0 &&
    2998          25 :             bdev_io->u.bdev.num_blocks > bdev_io->bdev->max_copy) {
    2999           6 :                 return true;
    3000             :         }
    3001             : 
    3002          24 :         return false;
    3003          30 : }
    3004             : 
    3005             : static bool
    3006         792 : bdev_io_should_split(struct spdk_bdev_io *bdev_io)
    3007             : {
    3008         792 :         switch (bdev_io->type) {
    3009             :         case SPDK_BDEV_IO_TYPE_READ:
    3010             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3011         621 :                 return bdev_rw_should_split(bdev_io);
    3012             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3013          24 :                 return bdev_unmap_should_split(bdev_io);
    3014             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3015          37 :                 return bdev_write_zeroes_should_split(bdev_io);
    3016             :         case SPDK_BDEV_IO_TYPE_COPY:
    3017          30 :                 return bdev_copy_should_split(bdev_io);
    3018             :         default:
    3019          80 :                 return false;
    3020             :         }
    3021         792 : }
    3022             : 
    3023             : static uint32_t
    3024         249 : _to_next_boundary(uint64_t offset, uint32_t boundary)
    3025             : {
    3026         249 :         return (boundary - (offset % boundary));
    3027             : }
    3028             : 
    3029             : static void bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
    3030             : 
    3031             : static void _bdev_rw_split(void *_bdev_io);
    3032             : 
    3033             : static void bdev_unmap_split(struct spdk_bdev_io *bdev_io);
    3034             : 
    3035             : static void
    3036           0 : _bdev_unmap_split(void *_bdev_io)
    3037             : {
    3038           0 :         return bdev_unmap_split((struct spdk_bdev_io *)_bdev_io);
    3039             : }
    3040             : 
    3041             : static void bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io);
    3042             : 
    3043             : static void
    3044           0 : _bdev_write_zeroes_split(void *_bdev_io)
    3045             : {
    3046           0 :         return bdev_write_zeroes_split((struct spdk_bdev_io *)_bdev_io);
    3047             : }
    3048             : 
    3049             : static void bdev_copy_split(struct spdk_bdev_io *bdev_io);
    3050             : 
    3051             : static void
    3052           0 : _bdev_copy_split(void *_bdev_io)
    3053             : {
    3054           0 :         return bdev_copy_split((struct spdk_bdev_io *)_bdev_io);
    3055             : }
    3056             : 
    3057             : static int
    3058         305 : bdev_io_split_submit(struct spdk_bdev_io *bdev_io, struct iovec *iov, int iovcnt, void *md_buf,
    3059             :                      uint64_t num_blocks, uint64_t *offset, uint64_t *remaining)
    3060             : {
    3061             :         int rc;
    3062             :         uint64_t current_offset, current_remaining, current_src_offset;
    3063             :         spdk_bdev_io_wait_cb io_wait_fn;
    3064             : 
    3065         305 :         current_offset = *offset;
    3066         305 :         current_remaining = *remaining;
    3067             : 
    3068         305 :         assert(bdev_io->internal.f.split);
    3069             : 
    3070         305 :         bdev_io->internal.split.outstanding++;
    3071             : 
    3072         305 :         io_wait_fn = _bdev_rw_split;
    3073         305 :         switch (bdev_io->type) {
    3074             :         case SPDK_BDEV_IO_TYPE_READ:
    3075         196 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3076         392 :                 rc = bdev_readv_blocks_with_md(bdev_io->internal.desc,
    3077         196 :                                                spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3078         196 :                                                iov, iovcnt, md_buf, current_offset,
    3079         196 :                                                num_blocks,
    3080         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3081         196 :                                                bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3082             :                                                NULL,
    3083         196 :                                                bdev_io->u.bdev.dif_check_flags,
    3084         196 :                                                bdev_io_split_done, bdev_io);
    3085         196 :                 break;
    3086             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3087          50 :                 assert(bdev_io->u.bdev.accel_sequence == NULL);
    3088         100 :                 rc = bdev_writev_blocks_with_md(bdev_io->internal.desc,
    3089          50 :                                                 spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3090          50 :                                                 iov, iovcnt, md_buf, current_offset,
    3091          50 :                                                 num_blocks,
    3092          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain : NULL,
    3093          50 :                                                 bdev_io_use_memory_domain(bdev_io) ? bdev_io->internal.memory_domain_ctx : NULL,
    3094             :                                                 NULL,
    3095          50 :                                                 bdev_io->u.bdev.dif_check_flags,
    3096          50 :                                                 bdev_io->u.bdev.nvme_cdw12.raw,
    3097          50 :                                                 bdev_io->u.bdev.nvme_cdw13.raw,
    3098          50 :                                                 bdev_io_split_done, bdev_io);
    3099          50 :                 break;
    3100             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3101          17 :                 io_wait_fn = _bdev_unmap_split;
    3102          34 :                 rc = spdk_bdev_unmap_blocks(bdev_io->internal.desc,
    3103          17 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3104          17 :                                             current_offset, num_blocks,
    3105          17 :                                             bdev_io_split_done, bdev_io);
    3106          17 :                 break;
    3107             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3108          23 :                 io_wait_fn = _bdev_write_zeroes_split;
    3109          46 :                 rc = spdk_bdev_write_zeroes_blocks(bdev_io->internal.desc,
    3110          23 :                                                    spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3111          23 :                                                    current_offset, num_blocks,
    3112          23 :                                                    bdev_io_split_done, bdev_io);
    3113          23 :                 break;
    3114             :         case SPDK_BDEV_IO_TYPE_COPY:
    3115          19 :                 io_wait_fn = _bdev_copy_split;
    3116          38 :                 current_src_offset = bdev_io->u.bdev.copy.src_offset_blocks +
    3117          19 :                                      (current_offset - bdev_io->u.bdev.offset_blocks);
    3118          38 :                 rc = spdk_bdev_copy_blocks(bdev_io->internal.desc,
    3119          19 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
    3120          19 :                                            current_offset, current_src_offset, num_blocks,
    3121          19 :                                            bdev_io_split_done, bdev_io);
    3122          19 :                 break;
    3123             :         default:
    3124           0 :                 assert(false);
    3125             :                 rc = -EINVAL;
    3126             :                 break;
    3127             :         }
    3128             : 
    3129         305 :         if (rc == 0) {
    3130         301 :                 current_offset += num_blocks;
    3131         301 :                 current_remaining -= num_blocks;
    3132         301 :                 bdev_io->internal.split.current_offset_blocks = current_offset;
    3133         301 :                 bdev_io->internal.split.remaining_num_blocks = current_remaining;
    3134         301 :                 *offset = current_offset;
    3135         301 :                 *remaining = current_remaining;
    3136         301 :         } else {
    3137           4 :                 bdev_io->internal.split.outstanding--;
    3138           4 :                 if (rc == -ENOMEM) {
    3139           4 :                         if (bdev_io->internal.split.outstanding == 0) {
    3140             :                                 /* No I/O is outstanding. Hence we should wait here. */
    3141           1 :                                 bdev_queue_io_wait_with_cb(bdev_io, io_wait_fn);
    3142           1 :                         }
    3143           4 :                 } else {
    3144           0 :                         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3145           0 :                         if (bdev_io->internal.split.outstanding == 0) {
    3146           0 :                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3147           0 :                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3148             :                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3149             :                                                   bdev_io->internal.ch->queue_depth);
    3150           0 :                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3151           0 :                         }
    3152             :                 }
    3153             :         }
    3154             : 
    3155         305 :         return rc;
    3156             : }
    3157             : 
    3158             : static void
    3159          67 : _bdev_rw_split(void *_bdev_io)
    3160             : {
    3161             :         struct iovec *parent_iov, *iov;
    3162          67 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    3163          67 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3164             :         uint64_t parent_offset, current_offset, remaining;
    3165             :         uint32_t parent_iov_offset, parent_iovcnt, parent_iovpos, child_iovcnt;
    3166             :         uint32_t to_next_boundary, to_next_boundary_bytes, to_last_block_bytes;
    3167             :         uint32_t iovcnt, iov_len, child_iovsize;
    3168          67 :         uint32_t blocklen = bdev->blocklen;
    3169             :         uint32_t io_boundary;
    3170          67 :         uint32_t max_segment_size = bdev->max_segment_size;
    3171          67 :         uint32_t max_child_iovcnt = bdev->max_num_segments;
    3172          67 :         uint32_t max_size = bdev->max_rw_size;
    3173          67 :         void *md_buf = NULL;
    3174             :         int rc;
    3175             : 
    3176          67 :         max_size = max_size ? max_size : UINT32_MAX;
    3177          67 :         max_segment_size = max_segment_size ? max_segment_size : UINT32_MAX;
    3178          67 :         max_child_iovcnt = max_child_iovcnt ? spdk_min(max_child_iovcnt, SPDK_BDEV_IO_NUM_CHILD_IOV) :
    3179             :                            SPDK_BDEV_IO_NUM_CHILD_IOV;
    3180             : 
    3181          67 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE && bdev->split_on_write_unit) {
    3182           5 :                 io_boundary = bdev->write_unit_size;
    3183          67 :         } else if (bdev->split_on_optimal_io_boundary) {
    3184          40 :                 io_boundary = bdev->optimal_io_boundary;
    3185          40 :         } else {
    3186          22 :                 io_boundary = UINT32_MAX;
    3187             :         }
    3188             : 
    3189          67 :         assert(bdev_io->internal.f.split);
    3190             : 
    3191          67 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3192          67 :         current_offset = bdev_io->internal.split.current_offset_blocks;
    3193          67 :         parent_offset = bdev_io->u.bdev.offset_blocks;
    3194          67 :         parent_iov_offset = (current_offset - parent_offset) * blocklen;
    3195          67 :         parent_iovcnt = bdev_io->u.bdev.iovcnt;
    3196             : 
    3197         420 :         for (parent_iovpos = 0; parent_iovpos < parent_iovcnt; parent_iovpos++) {
    3198         420 :                 parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3199         420 :                 if (parent_iov_offset < parent_iov->iov_len) {
    3200          67 :                         break;
    3201             :                 }
    3202         353 :                 parent_iov_offset -= parent_iov->iov_len;
    3203         353 :         }
    3204             : 
    3205          67 :         child_iovcnt = 0;
    3206         573 :         while (remaining > 0 && parent_iovpos < parent_iovcnt &&
    3207         264 :                child_iovcnt < SPDK_BDEV_IO_NUM_CHILD_IOV) {
    3208         249 :                 to_next_boundary = _to_next_boundary(current_offset, io_boundary);
    3209         249 :                 to_next_boundary = spdk_min(remaining, to_next_boundary);
    3210         249 :                 to_next_boundary = spdk_min(max_size, to_next_boundary);
    3211         249 :                 to_next_boundary_bytes = to_next_boundary * blocklen;
    3212             : 
    3213         249 :                 iov = &bdev_io->child_iov[child_iovcnt];
    3214         249 :                 iovcnt = 0;
    3215             : 
    3216         249 :                 if (bdev_io->u.bdev.md_buf) {
    3217          48 :                         md_buf = (char *)bdev_io->u.bdev.md_buf +
    3218          24 :                                  (current_offset - parent_offset) * spdk_bdev_get_md_size(bdev);
    3219          24 :                 }
    3220             : 
    3221         249 :                 child_iovsize = spdk_min(SPDK_BDEV_IO_NUM_CHILD_IOV - child_iovcnt, max_child_iovcnt);
    3222        1810 :                 while (to_next_boundary_bytes > 0 && parent_iovpos < parent_iovcnt &&
    3223         836 :                        iovcnt < child_iovsize) {
    3224         725 :                         parent_iov = &bdev_io->u.bdev.iovs[parent_iovpos];
    3225         725 :                         iov_len = parent_iov->iov_len - parent_iov_offset;
    3226             : 
    3227         725 :                         iov_len = spdk_min(iov_len, max_segment_size);
    3228         725 :                         iov_len = spdk_min(iov_len, to_next_boundary_bytes);
    3229         725 :                         to_next_boundary_bytes -= iov_len;
    3230             : 
    3231         725 :                         bdev_io->child_iov[child_iovcnt].iov_base = parent_iov->iov_base + parent_iov_offset;
    3232         725 :                         bdev_io->child_iov[child_iovcnt].iov_len = iov_len;
    3233             : 
    3234         725 :                         if (iov_len < parent_iov->iov_len - parent_iov_offset) {
    3235         183 :                                 parent_iov_offset += iov_len;
    3236         183 :                         } else {
    3237         542 :                                 parent_iovpos++;
    3238         542 :                                 parent_iov_offset = 0;
    3239             :                         }
    3240         725 :                         child_iovcnt++;
    3241         725 :                         iovcnt++;
    3242             :                 }
    3243             : 
    3244         249 :                 if (to_next_boundary_bytes > 0) {
    3245             :                         /* We had to stop this child I/O early because we ran out of
    3246             :                          * child_iov space or were limited by max_num_segments.
    3247             :                          * Ensure the iovs to be aligned with block size and
    3248             :                          * then adjust to_next_boundary before starting the
    3249             :                          * child I/O.
    3250             :                          */
    3251         111 :                         assert(child_iovcnt == SPDK_BDEV_IO_NUM_CHILD_IOV ||
    3252             :                                iovcnt == child_iovsize);
    3253         111 :                         to_last_block_bytes = to_next_boundary_bytes % blocklen;
    3254         111 :                         if (to_last_block_bytes != 0) {
    3255          24 :                                 uint32_t child_iovpos = child_iovcnt - 1;
    3256             :                                 /* don't decrease child_iovcnt when it equals to SPDK_BDEV_IO_NUM_CHILD_IOV
    3257             :                                  * so the loop will naturally end
    3258             :                                  */
    3259             : 
    3260          24 :                                 to_last_block_bytes = blocklen - to_last_block_bytes;
    3261          24 :                                 to_next_boundary_bytes += to_last_block_bytes;
    3262          53 :                                 while (to_last_block_bytes > 0 && iovcnt > 0) {
    3263          32 :                                         iov_len = spdk_min(to_last_block_bytes,
    3264             :                                                            bdev_io->child_iov[child_iovpos].iov_len);
    3265          32 :                                         bdev_io->child_iov[child_iovpos].iov_len -= iov_len;
    3266          32 :                                         if (bdev_io->child_iov[child_iovpos].iov_len == 0) {
    3267          15 :                                                 child_iovpos--;
    3268          15 :                                                 if (--iovcnt == 0) {
    3269             :                                                         /* If the child IO is less than a block size just return.
    3270             :                                                          * If the first child IO of any split round is less than
    3271             :                                                          * a block size, an error exit.
    3272             :                                                          */
    3273           3 :                                                         if (bdev_io->internal.split.outstanding == 0) {
    3274           1 :                                                                 SPDK_ERRLOG("The first child io was less than a block size\n");
    3275           1 :                                                                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3276           1 :                                                                 bdev_ch_remove_from_io_submitted(bdev_io);
    3277           1 :                                                                 spdk_trace_record(TRACE_BDEV_IO_DONE, bdev_io->internal.ch->trace_id,
    3278             :                                                                                   0, (uintptr_t)bdev_io, bdev_io->internal.caller_ctx,
    3279             :                                                                                   bdev_io->internal.ch->queue_depth);
    3280           1 :                                                                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    3281           1 :                                                         }
    3282             : 
    3283           3 :                                                         return;
    3284             :                                                 }
    3285          12 :                                         }
    3286             : 
    3287          29 :                                         to_last_block_bytes -= iov_len;
    3288             : 
    3289          29 :                                         if (parent_iov_offset == 0) {
    3290          14 :                                                 parent_iovpos--;
    3291          14 :                                                 parent_iov_offset = bdev_io->u.bdev.iovs[parent_iovpos].iov_len;
    3292          14 :                                         }
    3293          29 :                                         parent_iov_offset -= iov_len;
    3294             :                                 }
    3295             : 
    3296          21 :                                 assert(to_last_block_bytes == 0);
    3297          21 :                         }
    3298         108 :                         to_next_boundary -= to_next_boundary_bytes / blocklen;
    3299         108 :                 }
    3300             : 
    3301         246 :                 rc = bdev_io_split_submit(bdev_io, iov, iovcnt, md_buf, to_next_boundary,
    3302             :                                           &current_offset, &remaining);
    3303         246 :                 if (spdk_unlikely(rc)) {
    3304           4 :                         return;
    3305             :                 }
    3306             :         }
    3307          67 : }
    3308             : 
    3309             : static void
    3310           3 : bdev_unmap_split(struct spdk_bdev_io *bdev_io)
    3311             : {
    3312             :         uint64_t offset, unmap_blocks, remaining, max_unmap_blocks;
    3313           3 :         uint32_t num_children_reqs = 0;
    3314             :         int rc;
    3315             : 
    3316           3 :         assert(bdev_io->internal.f.split);
    3317             : 
    3318           3 :         offset = bdev_io->internal.split.current_offset_blocks;
    3319           3 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3320           3 :         max_unmap_blocks = bdev_io->bdev->max_unmap * bdev_io->bdev->max_unmap_segments;
    3321             : 
    3322          20 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3323          17 :                 unmap_blocks = spdk_min(remaining, max_unmap_blocks);
    3324             : 
    3325          17 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, unmap_blocks,
    3326             :                                           &offset, &remaining);
    3327          17 :                 if (spdk_likely(rc == 0)) {
    3328          17 :                         num_children_reqs++;
    3329          17 :                 } else {
    3330           0 :                         return;
    3331             :                 }
    3332             :         }
    3333           3 : }
    3334             : 
    3335             : static void
    3336           6 : bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io)
    3337             : {
    3338             :         uint64_t offset, write_zeroes_blocks, remaining;
    3339           6 :         uint32_t num_children_reqs = 0;
    3340             :         int rc;
    3341             : 
    3342           6 :         assert(bdev_io->internal.f.split);
    3343             : 
    3344           6 :         offset = bdev_io->internal.split.current_offset_blocks;
    3345           6 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3346             : 
    3347          29 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_UNMAP_WRITE_ZEROES_REQS)) {
    3348          23 :                 write_zeroes_blocks = spdk_min(remaining, bdev_io->bdev->max_write_zeroes);
    3349             : 
    3350          23 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, write_zeroes_blocks,
    3351             :                                           &offset, &remaining);
    3352          23 :                 if (spdk_likely(rc == 0)) {
    3353          23 :                         num_children_reqs++;
    3354          23 :                 } else {
    3355           0 :                         return;
    3356             :                 }
    3357             :         }
    3358           6 : }
    3359             : 
    3360             : static void
    3361           4 : bdev_copy_split(struct spdk_bdev_io *bdev_io)
    3362             : {
    3363             :         uint64_t offset, copy_blocks, remaining;
    3364           4 :         uint32_t num_children_reqs = 0;
    3365             :         int rc;
    3366             : 
    3367           4 :         assert(bdev_io->internal.f.split);
    3368             : 
    3369           4 :         offset = bdev_io->internal.split.current_offset_blocks;
    3370           4 :         remaining = bdev_io->internal.split.remaining_num_blocks;
    3371             : 
    3372           4 :         assert(bdev_io->bdev->max_copy != 0);
    3373          23 :         while (remaining && (num_children_reqs < SPDK_BDEV_MAX_CHILDREN_COPY_REQS)) {
    3374          19 :                 copy_blocks = spdk_min(remaining, bdev_io->bdev->max_copy);
    3375             : 
    3376          19 :                 rc = bdev_io_split_submit(bdev_io, NULL, 0, NULL, copy_blocks,
    3377             :                                           &offset, &remaining);
    3378          19 :                 if (spdk_likely(rc == 0)) {
    3379          19 :                         num_children_reqs++;
    3380          19 :                 } else {
    3381           0 :                         return;
    3382             :                 }
    3383             :         }
    3384           4 : }
    3385             : 
    3386             : static void
    3387          58 : parent_bdev_io_complete(void *ctx, int rc)
    3388             : {
    3389          58 :         struct spdk_bdev_io *parent_io = ctx;
    3390             : 
    3391          58 :         if (rc) {
    3392           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3393           0 :         }
    3394             : 
    3395         116 :         parent_io->internal.cb(parent_io, parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    3396          58 :                                parent_io->internal.caller_ctx);
    3397          58 : }
    3398             : 
    3399             : static void
    3400           0 : bdev_io_complete_parent_sequence_cb(void *ctx, int status)
    3401             : {
    3402           0 :         struct spdk_bdev_io *bdev_io = ctx;
    3403             : 
    3404             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    3405           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    3406           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    3407           0 :         bdev_io->internal.f.has_accel_sequence = false;
    3408             : 
    3409           0 :         if (spdk_unlikely(status != 0)) {
    3410           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    3411           0 :         }
    3412             : 
    3413           0 :         parent_bdev_io_complete(bdev_io, status);
    3414           0 : }
    3415             : 
    3416             : static void
    3417         301 : bdev_io_split_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    3418             : {
    3419         301 :         struct spdk_bdev_io *parent_io = cb_arg;
    3420             : 
    3421         301 :         spdk_bdev_free_io(bdev_io);
    3422             : 
    3423         301 :         assert(parent_io->internal.f.split);
    3424             : 
    3425         301 :         if (!success) {
    3426          21 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    3427             :                 /* If any child I/O failed, stop further splitting process. */
    3428          21 :                 parent_io->internal.split.current_offset_blocks += parent_io->internal.split.remaining_num_blocks;
    3429          21 :                 parent_io->internal.split.remaining_num_blocks = 0;
    3430          21 :         }
    3431         301 :         parent_io->internal.split.outstanding--;
    3432         301 :         if (parent_io->internal.split.outstanding != 0) {
    3433         223 :                 return;
    3434             :         }
    3435             : 
    3436             :         /*
    3437             :          * Parent I/O finishes when all blocks are consumed.
    3438             :          */
    3439          78 :         if (parent_io->internal.split.remaining_num_blocks == 0) {
    3440          58 :                 assert(parent_io->internal.cb != bdev_io_split_done);
    3441          58 :                 bdev_ch_remove_from_io_submitted(parent_io);
    3442          58 :                 spdk_trace_record(TRACE_BDEV_IO_DONE, parent_io->internal.ch->trace_id,
    3443             :                                   0, (uintptr_t)parent_io, bdev_io->internal.caller_ctx,
    3444             :                                   parent_io->internal.ch->queue_depth);
    3445             : 
    3446          58 :                 if (spdk_likely(parent_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    3447          48 :                         if (bdev_io_needs_sequence_exec(parent_io->internal.desc, parent_io)) {
    3448           0 :                                 bdev_io_exec_sequence(parent_io, bdev_io_complete_parent_sequence_cb);
    3449           0 :                                 return;
    3450          48 :                         } else if (parent_io->internal.f.has_bounce_buf &&
    3451           0 :                                    !bdev_io_use_accel_sequence(bdev_io)) {
    3452             :                                 /* bdev IO will be completed in the callback */
    3453           0 :                                 _bdev_io_push_bounce_data_buffer(parent_io, parent_bdev_io_complete);
    3454           0 :                                 return;
    3455             :                         }
    3456          48 :                 }
    3457             : 
    3458          58 :                 parent_bdev_io_complete(parent_io, 0);
    3459          58 :                 return;
    3460             :         }
    3461             : 
    3462             :         /*
    3463             :          * Continue with the splitting process.  This function will complete the parent I/O if the
    3464             :          * splitting is done.
    3465             :          */
    3466          20 :         switch (parent_io->type) {
    3467             :         case SPDK_BDEV_IO_TYPE_READ:
    3468             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3469          17 :                 _bdev_rw_split(parent_io);
    3470          17 :                 break;
    3471             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3472           1 :                 bdev_unmap_split(parent_io);
    3473           1 :                 break;
    3474             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3475           1 :                 bdev_write_zeroes_split(parent_io);
    3476           1 :                 break;
    3477             :         case SPDK_BDEV_IO_TYPE_COPY:
    3478           1 :                 bdev_copy_split(parent_io);
    3479           1 :                 break;
    3480             :         default:
    3481           0 :                 assert(false);
    3482             :                 break;
    3483             :         }
    3484         301 : }
    3485             : 
    3486             : static void bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3487             :                                      bool success);
    3488             : 
    3489             : static void
    3490          59 : bdev_io_split(struct spdk_bdev_io *bdev_io)
    3491             : {
    3492          59 :         assert(bdev_io_should_split(bdev_io));
    3493          59 :         assert(bdev_io->internal.f.split);
    3494             : 
    3495          59 :         bdev_io->internal.split.current_offset_blocks = bdev_io->u.bdev.offset_blocks;
    3496          59 :         bdev_io->internal.split.remaining_num_blocks = bdev_io->u.bdev.num_blocks;
    3497          59 :         bdev_io->internal.split.outstanding = 0;
    3498          59 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    3499             : 
    3500          59 :         switch (bdev_io->type) {
    3501             :         case SPDK_BDEV_IO_TYPE_READ:
    3502             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3503          49 :                 if (_is_buf_allocated(bdev_io->u.bdev.iovs)) {
    3504          49 :                         _bdev_rw_split(bdev_io);
    3505          49 :                 } else {
    3506           0 :                         assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3507           0 :                         spdk_bdev_io_get_buf(bdev_io, bdev_rw_split_get_buf_cb,
    3508           0 :                                              bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
    3509             :                 }
    3510          49 :                 break;
    3511             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3512           2 :                 bdev_unmap_split(bdev_io);
    3513           2 :                 break;
    3514             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3515           5 :                 bdev_write_zeroes_split(bdev_io);
    3516           5 :                 break;
    3517             :         case SPDK_BDEV_IO_TYPE_COPY:
    3518           3 :                 bdev_copy_split(bdev_io);
    3519           3 :                 break;
    3520             :         default:
    3521           0 :                 assert(false);
    3522             :                 break;
    3523             :         }
    3524          59 : }
    3525             : 
    3526             : static void
    3527           0 : bdev_rw_split_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
    3528             : {
    3529           0 :         if (!success) {
    3530           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3531           0 :                 return;
    3532             :         }
    3533             : 
    3534           0 :         _bdev_rw_split(bdev_io);
    3535           0 : }
    3536             : 
    3537             : static inline void
    3538         579 : _bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3539             : {
    3540         579 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3541         579 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3542             : 
    3543         579 :         if (spdk_likely(bdev_ch->flags == 0)) {
    3544         554 :                 bdev_io_do_submit(bdev_ch, bdev_io);
    3545         554 :                 return;
    3546             :         }
    3547             : 
    3548          25 :         if (bdev_ch->flags & BDEV_CH_RESET_IN_PROGRESS) {
    3549           2 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    3550          25 :         } else if (bdev_ch->flags & BDEV_CH_QOS_ENABLED) {
    3551          23 :                 if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT) &&
    3552           2 :                     bdev_abort_queued_io(&bdev_ch->qos_queued_io, bdev_io->u.abort.bio_to_abort)) {
    3553           0 :                         _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    3554           0 :                 } else {
    3555          23 :                         TAILQ_INSERT_TAIL(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    3556          23 :                         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    3557             :                 }
    3558          23 :         } else {
    3559           0 :                 SPDK_ERRLOG("unknown bdev_ch flag %x found\n", bdev_ch->flags);
    3560           0 :                 _bdev_io_complete_in_submit(bdev_ch, bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    3561             :         }
    3562         579 : }
    3563             : 
    3564             : bool bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2);
    3565             : 
    3566             : bool
    3567          23 : bdev_lba_range_overlapped(struct lba_range *range1, struct lba_range *range2)
    3568             : {
    3569          23 :         if (range1->length == 0 || range2->length == 0) {
    3570           1 :                 return false;
    3571             :         }
    3572             : 
    3573          22 :         if (range1->offset + range1->length <= range2->offset) {
    3574           1 :                 return false;
    3575             :         }
    3576             : 
    3577          21 :         if (range2->offset + range2->length <= range1->offset) {
    3578           3 :                 return false;
    3579             :         }
    3580             : 
    3581          18 :         return true;
    3582          23 : }
    3583             : 
    3584             : static bool
    3585          11 : bdev_io_range_is_locked(struct spdk_bdev_io *bdev_io, struct lba_range *range)
    3586             : {
    3587          11 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3588             :         struct lba_range r;
    3589             : 
    3590          11 :         switch (bdev_io->type) {
    3591             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3592             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3593             :                 /* Don't try to decode the NVMe command - just assume worst-case and that
    3594             :                  * it overlaps a locked range.
    3595             :                  */
    3596           0 :                 return true;
    3597             :         case SPDK_BDEV_IO_TYPE_READ:
    3598           6 :                 if (!range->quiesce) {
    3599           4 :                         return false;
    3600             :                 }
    3601             :         /* fallthrough */
    3602             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3603             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3604             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3605             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    3606             :         case SPDK_BDEV_IO_TYPE_COPY:
    3607           7 :                 r.offset = bdev_io->u.bdev.offset_blocks;
    3608           7 :                 r.length = bdev_io->u.bdev.num_blocks;
    3609           7 :                 if (!bdev_lba_range_overlapped(range, &r)) {
    3610             :                         /* This I/O doesn't overlap the specified LBA range. */
    3611           0 :                         return false;
    3612           7 :                 } else if (range->owner_ch == ch && range->locked_ctx == bdev_io->internal.caller_ctx) {
    3613             :                         /* This I/O overlaps, but the I/O is on the same channel that locked this
    3614             :                          * range, and the caller_ctx is the same as the locked_ctx.  This means
    3615             :                          * that this I/O is associated with the lock, and is allowed to execute.
    3616             :                          */
    3617           2 :                         return false;
    3618             :                 } else {
    3619           5 :                         return true;
    3620             :                 }
    3621             :         default:
    3622           0 :                 return false;
    3623             :         }
    3624          11 : }
    3625             : 
    3626             : void
    3627         639 : bdev_io_submit(struct spdk_bdev_io *bdev_io)
    3628             : {
    3629         639 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3630             : 
    3631         639 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3632             : 
    3633         639 :         if (!TAILQ_EMPTY(&ch->locked_ranges)) {
    3634             :                 struct lba_range *range;
    3635             : 
    3636          13 :                 TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
    3637           8 :                         if (bdev_io_range_is_locked(bdev_io, range)) {
    3638           3 :                                 TAILQ_INSERT_TAIL(&ch->io_locked, bdev_io, internal.ch_link);
    3639           3 :                                 return;
    3640             :                         }
    3641           5 :                 }
    3642           5 :         }
    3643             : 
    3644         636 :         bdev_ch_add_to_io_submitted(bdev_io);
    3645             : 
    3646         636 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    3647         636 :         spdk_trace_record_tsc(bdev_io->internal.submit_tsc, TRACE_BDEV_IO_START,
    3648             :                               ch->trace_id, bdev_io->u.bdev.num_blocks,
    3649             :                               (uintptr_t)bdev_io, (uint64_t)bdev_io->type, bdev_io->internal.caller_ctx,
    3650             :                               bdev_io->u.bdev.offset_blocks, ch->queue_depth);
    3651             : 
    3652         636 :         if (bdev_io->internal.f.split) {
    3653          59 :                 bdev_io_split(bdev_io);
    3654          59 :                 return;
    3655             :         }
    3656             : 
    3657         577 :         _bdev_io_submit(bdev_io);
    3658         639 : }
    3659             : 
    3660             : static inline void
    3661           4 : _bdev_io_ext_use_bounce_buffer(struct spdk_bdev_io *bdev_io)
    3662             : {
    3663             :         /* bdev doesn't support memory domains, thereby buffers in this IO request can't
    3664             :          * be accessed directly. It is needed to allocate buffers before issuing IO operation.
    3665             :          * For write operation we need to pull buffers from memory domain before submitting IO.
    3666             :          * Once read operation completes, we need to use memory_domain push functionality to
    3667             :          * update data in original memory domain IO buffer
    3668             :          * This IO request will go through a regular IO flow, so clear memory domains pointers */
    3669           4 :         assert(bdev_io->internal.f.has_memory_domain);
    3670           4 :         bdev_io->u.bdev.memory_domain = NULL;
    3671           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    3672           8 :         _bdev_memory_domain_io_get_buf(bdev_io, _bdev_memory_domain_get_io_cb,
    3673           4 :                                        bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
    3674           4 : }
    3675             : 
    3676             : static inline void
    3677         292 : _bdev_io_submit_ext(struct spdk_bdev_desc *desc, struct spdk_bdev_io *bdev_io)
    3678             : {
    3679         292 :         struct spdk_bdev_channel *ch = bdev_io->internal.ch;
    3680         292 :         bool needs_exec = bdev_io_needs_sequence_exec(desc, bdev_io);
    3681             : 
    3682         292 :         if (spdk_unlikely(ch->flags & BDEV_CH_RESET_IN_PROGRESS)) {
    3683           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_ABORTED;
    3684           0 :                 bdev_io_complete_unsubmitted(bdev_io);
    3685           0 :                 return;
    3686             :         }
    3687             : 
    3688             :         /* We need to allocate bounce buffer if bdev doesn't support memory domains, or if it does
    3689             :          * support them, but we need to execute an accel sequence and the data buffer is from accel
    3690             :          * memory domain (to avoid doing a push/pull from that domain).
    3691             :          */
    3692         292 :         if (bdev_io_use_memory_domain(bdev_io)) {
    3693           4 :                 if (!desc->memory_domains_supported ||
    3694           0 :                     (needs_exec && bdev_io->internal.memory_domain == spdk_accel_get_memory_domain())) {
    3695           4 :                         _bdev_io_ext_use_bounce_buffer(bdev_io);
    3696           4 :                         return;
    3697             :                 }
    3698           0 :         }
    3699             : 
    3700         288 :         if (needs_exec) {
    3701           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    3702           0 :                         bdev_io_exec_sequence(bdev_io, bdev_io_submit_sequence_cb);
    3703           0 :                         return;
    3704             :                 }
    3705             :                 /* For reads we'll execute the sequence after the data is read, so, for now, only
    3706             :                  * clear out accel_sequence pointer and submit the IO */
    3707           0 :                 assert(bdev_io->type == SPDK_BDEV_IO_TYPE_READ);
    3708           0 :                 bdev_io->u.bdev.accel_sequence = NULL;
    3709           0 :         }
    3710             : 
    3711         288 :         bdev_io_submit(bdev_io);
    3712         292 : }
    3713             : 
    3714             : static void
    3715          11 : bdev_io_submit_reset(struct spdk_bdev_io *bdev_io)
    3716             : {
    3717          11 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3718          11 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    3719          11 :         struct spdk_io_channel *ch = bdev_ch->channel;
    3720             : 
    3721          11 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_PENDING);
    3722             : 
    3723          11 :         bdev_io->internal.f.in_submit_request = true;
    3724          11 :         bdev_submit_request(bdev, ch, bdev_io);
    3725          11 :         bdev_io->internal.f.in_submit_request = false;
    3726          11 : }
    3727             : 
    3728             : void
    3729         691 : bdev_io_init(struct spdk_bdev_io *bdev_io,
    3730             :              struct spdk_bdev *bdev, void *cb_arg,
    3731             :              spdk_bdev_io_completion_cb cb)
    3732             : {
    3733         691 :         bdev_io->bdev = bdev;
    3734         691 :         bdev_io->internal.f.raw = 0;
    3735         691 :         bdev_io->internal.caller_ctx = cb_arg;
    3736         691 :         bdev_io->internal.cb = cb;
    3737         691 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    3738         691 :         bdev_io->internal.f.in_submit_request = false;
    3739         691 :         bdev_io->internal.error.nvme.cdw0 = 0;
    3740         691 :         bdev_io->num_retries = 0;
    3741         691 :         bdev_io->internal.get_buf_cb = NULL;
    3742         691 :         bdev_io->internal.get_aux_buf_cb = NULL;
    3743         691 :         bdev_io->internal.data_transfer_cpl = NULL;
    3744         691 :         bdev_io->internal.f.split = bdev_io_should_split(bdev_io);
    3745         691 : }
    3746             : 
    3747             : static bool
    3748         520 : bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3749             : {
    3750         520 :         return bdev->fn_table->io_type_supported(bdev->ctxt, io_type);
    3751             : }
    3752             : 
    3753             : bool
    3754         170 : spdk_bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
    3755             : {
    3756             :         bool supported;
    3757             : 
    3758         170 :         supported = bdev_io_type_supported(bdev, io_type);
    3759             : 
    3760         170 :         if (!supported) {
    3761           7 :                 switch (io_type) {
    3762             :                 case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3763             :                         /* The bdev layer will emulate write zeroes as long as write is supported. */
    3764           0 :                         supported = bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE);
    3765           0 :                         break;
    3766             :                 default:
    3767           7 :                         break;
    3768             :                 }
    3769           7 :         }
    3770             : 
    3771         170 :         return supported;
    3772             : }
    3773             : 
    3774             : static const char *g_io_type_strings[] = {
    3775             :         [SPDK_BDEV_IO_TYPE_READ] = "read",
    3776             :         [SPDK_BDEV_IO_TYPE_WRITE] = "write",
    3777             :         [SPDK_BDEV_IO_TYPE_UNMAP] = "unmap",
    3778             :         [SPDK_BDEV_IO_TYPE_FLUSH] = "flush",
    3779             :         [SPDK_BDEV_IO_TYPE_RESET] = "reset",
    3780             :         [SPDK_BDEV_IO_TYPE_NVME_ADMIN] = "nvme_admin",
    3781             :         [SPDK_BDEV_IO_TYPE_NVME_IO] = "nvme_io",
    3782             :         [SPDK_BDEV_IO_TYPE_NVME_IO_MD] = "nvme_io_md",
    3783             :         [SPDK_BDEV_IO_TYPE_WRITE_ZEROES] = "write_zeroes",
    3784             :         [SPDK_BDEV_IO_TYPE_ZCOPY] = "zcopy",
    3785             :         [SPDK_BDEV_IO_TYPE_GET_ZONE_INFO] = "get_zone_info",
    3786             :         [SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT] = "zone_management",
    3787             :         [SPDK_BDEV_IO_TYPE_ZONE_APPEND] = "zone_append",
    3788             :         [SPDK_BDEV_IO_TYPE_COMPARE] = "compare",
    3789             :         [SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE] = "compare_and_write",
    3790             :         [SPDK_BDEV_IO_TYPE_ABORT] = "abort",
    3791             :         [SPDK_BDEV_IO_TYPE_SEEK_HOLE] = "seek_hole",
    3792             :         [SPDK_BDEV_IO_TYPE_SEEK_DATA] = "seek_data",
    3793             :         [SPDK_BDEV_IO_TYPE_COPY] = "copy",
    3794             :         [SPDK_BDEV_IO_TYPE_NVME_IOV_MD] = "nvme_iov_md",
    3795             : };
    3796             : 
    3797             : const char *
    3798           0 : spdk_bdev_get_io_type_name(enum spdk_bdev_io_type io_type)
    3799             : {
    3800           0 :         if (io_type <= SPDK_BDEV_IO_TYPE_INVALID || io_type >= SPDK_BDEV_NUM_IO_TYPES) {
    3801           0 :                 return NULL;
    3802             :         }
    3803             : 
    3804           0 :         return g_io_type_strings[io_type];
    3805           0 : }
    3806             : 
    3807             : int
    3808           0 : spdk_bdev_get_io_type(const char *io_type_string)
    3809             : {
    3810             :         int i;
    3811             : 
    3812           0 :         for (i = SPDK_BDEV_IO_TYPE_READ; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    3813           0 :                 if (!strcmp(io_type_string, g_io_type_strings[i])) {
    3814           0 :                         return i;
    3815             :                 }
    3816           0 :         }
    3817             : 
    3818           0 :         return -1;
    3819           0 : }
    3820             : 
    3821             : uint64_t
    3822           0 : spdk_bdev_io_get_submit_tsc(struct spdk_bdev_io *bdev_io)
    3823             : {
    3824           0 :         return bdev_io->internal.submit_tsc;
    3825             : }
    3826             : 
    3827             : int
    3828           0 : spdk_bdev_dump_info_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    3829             : {
    3830           0 :         if (bdev->fn_table->dump_info_json) {
    3831           0 :                 return bdev->fn_table->dump_info_json(bdev->ctxt, w);
    3832             :         }
    3833             : 
    3834           0 :         return 0;
    3835           0 : }
    3836             : 
    3837             : static void
    3838          10 : bdev_qos_update_max_quota_per_timeslice(struct spdk_bdev_qos *qos)
    3839             : {
    3840          10 :         uint32_t max_per_timeslice = 0;
    3841             :         int i;
    3842             : 
    3843          50 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3844          40 :                 if (qos->rate_limits[i].limit == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    3845          15 :                         qos->rate_limits[i].max_per_timeslice = 0;
    3846          15 :                         continue;
    3847             :                 }
    3848             : 
    3849          50 :                 max_per_timeslice = qos->rate_limits[i].limit *
    3850          25 :                                     SPDK_BDEV_QOS_TIMESLICE_IN_USEC / SPDK_SEC_TO_USEC;
    3851             : 
    3852          25 :                 qos->rate_limits[i].max_per_timeslice = spdk_max(max_per_timeslice,
    3853             :                                                         qos->rate_limits[i].min_per_timeslice);
    3854             : 
    3855          50 :                 __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    3856          25 :                                  qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELEASE);
    3857          25 :         }
    3858             : 
    3859          10 :         bdev_qos_set_ops(qos);
    3860          10 : }
    3861             : 
    3862             : static void
    3863           4 : bdev_channel_submit_qos_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    3864             :                            struct spdk_io_channel *io_ch, void *ctx)
    3865             : {
    3866           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    3867             :         int status;
    3868             : 
    3869           4 :         bdev_qos_io_submit(bdev_ch, bdev->internal.qos);
    3870             : 
    3871             :         /* if all IOs were sent then continue the iteration, otherwise - stop it */
    3872             :         /* TODO: channels round robing */
    3873           4 :         status = TAILQ_EMPTY(&bdev_ch->qos_queued_io) ? 0 : 1;
    3874             : 
    3875           4 :         spdk_bdev_for_each_channel_continue(i, status);
    3876           4 : }
    3877             : 
    3878             : 
    3879             : static void
    3880           2 : bdev_channel_submit_qos_io_done(struct spdk_bdev *bdev, void *ctx, int status)
    3881             : {
    3882             : 
    3883           2 : }
    3884             : 
    3885             : static int
    3886           3 : bdev_channel_poll_qos(void *arg)
    3887             : {
    3888           3 :         struct spdk_bdev *bdev = arg;
    3889           3 :         struct spdk_bdev_qos *qos = bdev->internal.qos;
    3890           3 :         uint64_t now = spdk_get_ticks();
    3891             :         int i;
    3892             :         int64_t remaining_last_timeslice;
    3893             : 
    3894           3 :         if (spdk_unlikely(qos->thread == NULL)) {
    3895             :                 /* Old QoS was unbound to remove and new QoS is not enabled yet. */
    3896           1 :                 return SPDK_POLLER_IDLE;
    3897             :         }
    3898             : 
    3899           2 :         if (now < (qos->last_timeslice + qos->timeslice_size)) {
    3900             :                 /* We received our callback earlier than expected - return
    3901             :                  *  immediately and wait to do accounting until at least one
    3902             :                  *  timeslice has actually expired.  This should never happen
    3903             :                  *  with a well-behaved timer implementation.
    3904             :                  */
    3905           0 :                 return SPDK_POLLER_IDLE;
    3906             :         }
    3907             : 
    3908             :         /* Reset for next round of rate limiting */
    3909          10 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3910             :                 /* We may have allowed the IOs or bytes to slightly overrun in the last
    3911             :                  * timeslice. remaining_this_timeslice is signed, so if it's negative
    3912             :                  * here, we'll account for the overrun so that the next timeslice will
    3913             :                  * be appropriately reduced.
    3914             :                  */
    3915           8 :                 remaining_last_timeslice = __atomic_exchange_n(&qos->rate_limits[i].remaining_this_timeslice,
    3916             :                                            0, __ATOMIC_RELAXED);
    3917           8 :                 if (remaining_last_timeslice < 0) {
    3918             :                         /* There could be a race condition here as both bdev_qos_rw_queue_io() and bdev_channel_poll_qos()
    3919             :                          * potentially use 2 atomic ops each, so they can intertwine.
    3920             :                          * This race can potentially cause the limits to be a little fuzzy but won't cause any real damage.
    3921             :                          */
    3922           0 :                         __atomic_store_n(&qos->rate_limits[i].remaining_this_timeslice,
    3923           0 :                                          remaining_last_timeslice, __ATOMIC_RELAXED);
    3924           0 :                 }
    3925           8 :         }
    3926             : 
    3927           4 :         while (now >= (qos->last_timeslice + qos->timeslice_size)) {
    3928           2 :                 qos->last_timeslice += qos->timeslice_size;
    3929          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    3930          16 :                         __atomic_add_fetch(&qos->rate_limits[i].remaining_this_timeslice,
    3931           8 :                                            qos->rate_limits[i].max_per_timeslice, __ATOMIC_RELAXED);
    3932           8 :                 }
    3933             :         }
    3934             : 
    3935           2 :         spdk_bdev_for_each_channel(bdev, bdev_channel_submit_qos_io, qos,
    3936             :                                    bdev_channel_submit_qos_io_done);
    3937             : 
    3938           2 :         return SPDK_POLLER_BUSY;
    3939           3 : }
    3940             : 
    3941             : static void
    3942          74 : bdev_channel_destroy_resource(struct spdk_bdev_channel *ch)
    3943             : {
    3944             :         struct spdk_bdev_shared_resource *shared_resource;
    3945             :         struct lba_range *range;
    3946             : 
    3947          74 :         bdev_free_io_stat(ch->stat);
    3948             : #ifdef SPDK_CONFIG_VTUNE
    3949             :         bdev_free_io_stat(ch->prev_stat);
    3950             : #endif
    3951             : 
    3952          74 :         while (!TAILQ_EMPTY(&ch->locked_ranges)) {
    3953           0 :                 range = TAILQ_FIRST(&ch->locked_ranges);
    3954           0 :                 TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
    3955           0 :                 free(range);
    3956             :         }
    3957             : 
    3958          74 :         spdk_put_io_channel(ch->channel);
    3959          74 :         spdk_put_io_channel(ch->accel_channel);
    3960             : 
    3961          74 :         shared_resource = ch->shared_resource;
    3962             : 
    3963          74 :         assert(TAILQ_EMPTY(&ch->io_locked));
    3964          74 :         assert(TAILQ_EMPTY(&ch->io_submitted));
    3965          74 :         assert(TAILQ_EMPTY(&ch->io_accel_exec));
    3966          74 :         assert(TAILQ_EMPTY(&ch->io_memory_domain));
    3967          74 :         assert(ch->io_outstanding == 0);
    3968          74 :         assert(shared_resource->ref > 0);
    3969          74 :         shared_resource->ref--;
    3970          74 :         if (shared_resource->ref == 0) {
    3971          73 :                 assert(shared_resource->io_outstanding == 0);
    3972          73 :                 TAILQ_REMOVE(&shared_resource->mgmt_ch->shared_resources, shared_resource, link);
    3973          73 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(shared_resource->mgmt_ch));
    3974          73 :                 spdk_poller_unregister(&shared_resource->nomem_poller);
    3975          73 :                 free(shared_resource);
    3976          73 :         }
    3977          74 : }
    3978             : 
    3979             : static void
    3980          83 : bdev_enable_qos(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch)
    3981             : {
    3982          83 :         struct spdk_bdev_qos    *qos = bdev->internal.qos;
    3983             :         int                     i;
    3984             : 
    3985          83 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    3986             : 
    3987             :         /* Rate limiting on this bdev enabled */
    3988          83 :         if (qos) {
    3989          17 :                 if (qos->ch == NULL) {
    3990             :                         struct spdk_io_channel *io_ch;
    3991             : 
    3992           9 :                         SPDK_DEBUGLOG(bdev, "Selecting channel %p as QoS channel for bdev %s on thread %p\n", ch,
    3993             :                                       bdev->name, spdk_get_thread());
    3994             : 
    3995             :                         /* No qos channel has been selected, so set one up */
    3996             : 
    3997             :                         /* Take another reference to ch */
    3998           9 :                         io_ch = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    3999           9 :                         assert(io_ch != NULL);
    4000           9 :                         qos->ch = ch;
    4001             : 
    4002           9 :                         qos->thread = spdk_io_channel_get_thread(io_ch);
    4003             : 
    4004          45 :                         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4005          36 :                                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    4006           9 :                                         qos->rate_limits[i].min_per_timeslice =
    4007             :                                                 SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE;
    4008           9 :                                 } else {
    4009          27 :                                         qos->rate_limits[i].min_per_timeslice =
    4010             :                                                 SPDK_BDEV_QOS_MIN_BYTE_PER_TIMESLICE;
    4011             :                                 }
    4012             : 
    4013          36 :                                 if (qos->rate_limits[i].limit == 0) {
    4014           2 :                                         qos->rate_limits[i].limit = SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    4015           2 :                                 }
    4016          36 :                         }
    4017           9 :                         bdev_qos_update_max_quota_per_timeslice(qos);
    4018           9 :                         qos->timeslice_size =
    4019           9 :                                 SPDK_BDEV_QOS_TIMESLICE_IN_USEC * spdk_get_ticks_hz() / SPDK_SEC_TO_USEC;
    4020           9 :                         qos->last_timeslice = spdk_get_ticks();
    4021           9 :                         qos->poller = SPDK_POLLER_REGISTER(bdev_channel_poll_qos,
    4022             :                                                            bdev,
    4023             :                                                            SPDK_BDEV_QOS_TIMESLICE_IN_USEC);
    4024           9 :                 }
    4025             : 
    4026          17 :                 ch->flags |= BDEV_CH_QOS_ENABLED;
    4027          17 :         }
    4028          83 : }
    4029             : 
    4030             : struct poll_timeout_ctx {
    4031             :         struct spdk_bdev_desc   *desc;
    4032             :         uint64_t                timeout_in_sec;
    4033             :         spdk_bdev_io_timeout_cb cb_fn;
    4034             :         void                    *cb_arg;
    4035             : };
    4036             : 
    4037             : static void
    4038         267 : bdev_desc_free(struct spdk_bdev_desc *desc)
    4039             : {
    4040         267 :         spdk_spin_destroy(&desc->spinlock);
    4041         267 :         free(desc->media_events_buffer);
    4042         267 :         free(desc);
    4043         267 : }
    4044             : 
    4045             : static void
    4046           8 : bdev_channel_poll_timeout_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    4047             : {
    4048           8 :         struct poll_timeout_ctx *ctx  = _ctx;
    4049           8 :         struct spdk_bdev_desc *desc = ctx->desc;
    4050             : 
    4051           8 :         free(ctx);
    4052             : 
    4053           8 :         spdk_spin_lock(&desc->spinlock);
    4054           8 :         desc->refs--;
    4055           8 :         if (desc->closed == true && desc->refs == 0) {
    4056           1 :                 spdk_spin_unlock(&desc->spinlock);
    4057           1 :                 bdev_desc_free(desc);
    4058           1 :                 return;
    4059             :         }
    4060           7 :         spdk_spin_unlock(&desc->spinlock);
    4061           8 : }
    4062             : 
    4063             : static void
    4064          13 : bdev_channel_poll_timeout_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    4065             :                              struct spdk_io_channel *io_ch, void *_ctx)
    4066             : {
    4067          13 :         struct poll_timeout_ctx *ctx  = _ctx;
    4068          13 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    4069          13 :         struct spdk_bdev_desc *desc = ctx->desc;
    4070             :         struct spdk_bdev_io *bdev_io;
    4071             :         uint64_t now;
    4072             : 
    4073          13 :         spdk_spin_lock(&desc->spinlock);
    4074          13 :         if (desc->closed == true) {
    4075           1 :                 spdk_spin_unlock(&desc->spinlock);
    4076           1 :                 spdk_bdev_for_each_channel_continue(i, -1);
    4077           1 :                 return;
    4078             :         }
    4079          12 :         spdk_spin_unlock(&desc->spinlock);
    4080             : 
    4081          12 :         now = spdk_get_ticks();
    4082          22 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
    4083             :                 /* Exclude any I/O that are generated via splitting. */
    4084          15 :                 if (bdev_io->internal.cb == bdev_io_split_done) {
    4085           3 :                         continue;
    4086             :                 }
    4087             : 
    4088             :                 /* Once we find an I/O that has not timed out, we can immediately
    4089             :                  * exit the loop.
    4090             :                  */
    4091          24 :                 if (now < (bdev_io->internal.submit_tsc +
    4092          12 :                            ctx->timeout_in_sec * spdk_get_ticks_hz())) {
    4093           5 :                         goto end;
    4094             :                 }
    4095             : 
    4096           7 :                 if (bdev_io->internal.desc == desc) {
    4097           7 :                         ctx->cb_fn(ctx->cb_arg, bdev_io);
    4098           7 :                 }
    4099          14 :         }
    4100             : 
    4101             : end:
    4102          12 :         spdk_bdev_for_each_channel_continue(i, 0);
    4103          13 : }
    4104             : 
    4105             : static int
    4106           8 : bdev_poll_timeout_io(void *arg)
    4107             : {
    4108           8 :         struct spdk_bdev_desc *desc = arg;
    4109           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    4110             :         struct poll_timeout_ctx *ctx;
    4111             : 
    4112           8 :         ctx = calloc(1, sizeof(struct poll_timeout_ctx));
    4113           8 :         if (!ctx) {
    4114           0 :                 SPDK_ERRLOG("failed to allocate memory\n");
    4115           0 :                 return SPDK_POLLER_BUSY;
    4116             :         }
    4117           8 :         ctx->desc = desc;
    4118           8 :         ctx->cb_arg = desc->cb_arg;
    4119           8 :         ctx->cb_fn = desc->cb_fn;
    4120           8 :         ctx->timeout_in_sec = desc->timeout_in_sec;
    4121             : 
    4122             :         /* Take a ref on the descriptor in case it gets closed while we are checking
    4123             :          * all of the channels.
    4124             :          */
    4125           8 :         spdk_spin_lock(&desc->spinlock);
    4126           8 :         desc->refs++;
    4127           8 :         spdk_spin_unlock(&desc->spinlock);
    4128             : 
    4129           8 :         spdk_bdev_for_each_channel(bdev, bdev_channel_poll_timeout_io, ctx,
    4130             :                                    bdev_channel_poll_timeout_io_done);
    4131             : 
    4132           8 :         return SPDK_POLLER_BUSY;
    4133           8 : }
    4134             : 
    4135             : int
    4136           5 : spdk_bdev_set_timeout(struct spdk_bdev_desc *desc, uint64_t timeout_in_sec,
    4137             :                       spdk_bdev_io_timeout_cb cb_fn, void *cb_arg)
    4138             : {
    4139           5 :         assert(desc->thread == spdk_get_thread());
    4140             : 
    4141           5 :         spdk_poller_unregister(&desc->io_timeout_poller);
    4142             : 
    4143           5 :         if (timeout_in_sec) {
    4144           4 :                 assert(cb_fn != NULL);
    4145           4 :                 desc->io_timeout_poller = SPDK_POLLER_REGISTER(bdev_poll_timeout_io,
    4146             :                                           desc,
    4147             :                                           SPDK_BDEV_IO_POLL_INTERVAL_IN_MSEC * SPDK_SEC_TO_USEC /
    4148             :                                           1000);
    4149           4 :                 if (desc->io_timeout_poller == NULL) {
    4150           0 :                         SPDK_ERRLOG("can not register the desc timeout IO poller\n");
    4151           0 :                         return -1;
    4152             :                 }
    4153           4 :         }
    4154             : 
    4155           5 :         desc->cb_fn = cb_fn;
    4156           5 :         desc->cb_arg = cb_arg;
    4157           5 :         desc->timeout_in_sec = timeout_in_sec;
    4158             : 
    4159           5 :         return 0;
    4160           5 : }
    4161             : 
    4162             : static int
    4163          76 : bdev_channel_create(void *io_device, void *ctx_buf)
    4164             : {
    4165          76 :         struct spdk_bdev                *bdev = __bdev_from_io_dev(io_device);
    4166          76 :         struct spdk_bdev_channel        *ch = ctx_buf;
    4167             :         struct spdk_io_channel          *mgmt_io_ch;
    4168             :         struct spdk_bdev_mgmt_channel   *mgmt_ch;
    4169             :         struct spdk_bdev_shared_resource *shared_resource;
    4170             :         struct lba_range                *range;
    4171             : 
    4172          76 :         ch->bdev = bdev;
    4173          76 :         ch->channel = bdev->fn_table->get_io_channel(bdev->ctxt);
    4174          76 :         if (!ch->channel) {
    4175           2 :                 return -1;
    4176             :         }
    4177             : 
    4178          74 :         ch->accel_channel = spdk_accel_get_io_channel();
    4179          74 :         if (!ch->accel_channel) {
    4180           0 :                 spdk_put_io_channel(ch->channel);
    4181           0 :                 return -1;
    4182             :         }
    4183             : 
    4184          74 :         spdk_trace_record(TRACE_BDEV_IOCH_CREATE, bdev->internal.trace_id, 0, 0,
    4185             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4186             : 
    4187          74 :         assert(ch->histogram == NULL);
    4188          74 :         if (bdev->internal.histogram_enabled) {
    4189           0 :                 ch->histogram = spdk_histogram_data_alloc();
    4190           0 :                 if (ch->histogram == NULL) {
    4191           0 :                         SPDK_ERRLOG("Could not allocate histogram\n");
    4192           0 :                 }
    4193           0 :         }
    4194             : 
    4195          74 :         mgmt_io_ch = spdk_get_io_channel(&g_bdev_mgr);
    4196          74 :         if (!mgmt_io_ch) {
    4197           0 :                 spdk_put_io_channel(ch->channel);
    4198           0 :                 spdk_put_io_channel(ch->accel_channel);
    4199           0 :                 return -1;
    4200             :         }
    4201             : 
    4202          74 :         mgmt_ch = __io_ch_to_bdev_mgmt_ch(mgmt_io_ch);
    4203          76 :         TAILQ_FOREACH(shared_resource, &mgmt_ch->shared_resources, link) {
    4204           3 :                 if (shared_resource->shared_ch == ch->channel) {
    4205           1 :                         spdk_put_io_channel(mgmt_io_ch);
    4206           1 :                         shared_resource->ref++;
    4207           1 :                         break;
    4208             :                 }
    4209           2 :         }
    4210             : 
    4211          74 :         if (shared_resource == NULL) {
    4212          73 :                 shared_resource = calloc(1, sizeof(*shared_resource));
    4213          73 :                 if (shared_resource == NULL) {
    4214           0 :                         spdk_put_io_channel(ch->channel);
    4215           0 :                         spdk_put_io_channel(ch->accel_channel);
    4216           0 :                         spdk_put_io_channel(mgmt_io_ch);
    4217           0 :                         return -1;
    4218             :                 }
    4219             : 
    4220          73 :                 shared_resource->mgmt_ch = mgmt_ch;
    4221          73 :                 shared_resource->io_outstanding = 0;
    4222          73 :                 TAILQ_INIT(&shared_resource->nomem_io);
    4223          73 :                 shared_resource->nomem_threshold = 0;
    4224          73 :                 shared_resource->shared_ch = ch->channel;
    4225          73 :                 shared_resource->ref = 1;
    4226          73 :                 TAILQ_INSERT_TAIL(&mgmt_ch->shared_resources, shared_resource, link);
    4227          73 :         }
    4228             : 
    4229          74 :         ch->io_outstanding = 0;
    4230          74 :         TAILQ_INIT(&ch->queued_resets);
    4231          74 :         TAILQ_INIT(&ch->locked_ranges);
    4232          74 :         TAILQ_INIT(&ch->qos_queued_io);
    4233          74 :         ch->flags = 0;
    4234          74 :         ch->trace_id = bdev->internal.trace_id;
    4235          74 :         ch->shared_resource = shared_resource;
    4236             : 
    4237          74 :         TAILQ_INIT(&ch->io_submitted);
    4238          74 :         TAILQ_INIT(&ch->io_locked);
    4239          74 :         TAILQ_INIT(&ch->io_accel_exec);
    4240          74 :         TAILQ_INIT(&ch->io_memory_domain);
    4241             : 
    4242          74 :         ch->stat = bdev_alloc_io_stat(false);
    4243          74 :         if (ch->stat == NULL) {
    4244           0 :                 bdev_channel_destroy_resource(ch);
    4245           0 :                 return -1;
    4246             :         }
    4247             : 
    4248          74 :         ch->stat->ticks_rate = spdk_get_ticks_hz();
    4249             : 
    4250             : #ifdef SPDK_CONFIG_VTUNE
    4251             :         {
    4252             :                 char *name;
    4253             :                 __itt_init_ittlib(NULL, 0);
    4254             :                 name = spdk_sprintf_alloc("spdk_bdev_%s_%p", ch->bdev->name, ch);
    4255             :                 if (!name) {
    4256             :                         bdev_channel_destroy_resource(ch);
    4257             :                         return -1;
    4258             :                 }
    4259             :                 ch->handle = __itt_string_handle_create(name);
    4260             :                 free(name);
    4261             :                 ch->start_tsc = spdk_get_ticks();
    4262             :                 ch->interval_tsc = spdk_get_ticks_hz() / 100;
    4263             :                 ch->prev_stat = bdev_alloc_io_stat(false);
    4264             :                 if (ch->prev_stat == NULL) {
    4265             :                         bdev_channel_destroy_resource(ch);
    4266             :                         return -1;
    4267             :                 }
    4268             :         }
    4269             : #endif
    4270             : 
    4271          74 :         spdk_spin_lock(&bdev->internal.spinlock);
    4272          74 :         bdev_enable_qos(bdev, ch);
    4273             : 
    4274          75 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
    4275             :                 struct lba_range *new_range;
    4276             : 
    4277           1 :                 new_range = calloc(1, sizeof(*new_range));
    4278           1 :                 if (new_range == NULL) {
    4279           0 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    4280           0 :                         bdev_channel_destroy_resource(ch);
    4281           0 :                         return -1;
    4282             :                 }
    4283           1 :                 new_range->length = range->length;
    4284           1 :                 new_range->offset = range->offset;
    4285           1 :                 new_range->locked_ctx = range->locked_ctx;
    4286           1 :                 TAILQ_INSERT_TAIL(&ch->locked_ranges, new_range, tailq);
    4287           1 :         }
    4288             : 
    4289          74 :         spdk_spin_unlock(&bdev->internal.spinlock);
    4290             : 
    4291          74 :         return 0;
    4292          76 : }
    4293             : 
    4294             : static int
    4295           0 : bdev_abort_all_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry,
    4296             :                          void *cb_ctx)
    4297             : {
    4298           0 :         struct spdk_bdev_channel *bdev_ch = cb_ctx;
    4299             :         struct spdk_bdev_io *bdev_io;
    4300             :         uint64_t buf_len;
    4301             : 
    4302           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4303           0 :         if (bdev_io->internal.ch == bdev_ch) {
    4304           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4305           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4306           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4307           0 :         }
    4308             : 
    4309           0 :         return 0;
    4310             : }
    4311             : 
    4312             : /*
    4313             :  * Abort I/O that are waiting on a data buffer.
    4314             :  */
    4315             : static void
    4316          96 : bdev_abort_all_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_channel *ch)
    4317             : {
    4318          96 :         spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_all_buf_io_cb, ch);
    4319          96 : }
    4320             : 
    4321             : /*
    4322             :  * Abort I/O that are queued waiting for submission.  These types of I/O are
    4323             :  *  linked using the spdk_bdev_io link TAILQ_ENTRY.
    4324             :  */
    4325             : static void
    4326         188 : bdev_abort_all_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_channel *ch)
    4327             : {
    4328             :         struct spdk_bdev_io *bdev_io, *tmp;
    4329             : 
    4330         228 :         TAILQ_FOREACH_SAFE(bdev_io, queue, internal.link, tmp) {
    4331          40 :                 if (bdev_io->internal.ch == ch) {
    4332          40 :                         TAILQ_REMOVE(queue, bdev_io, internal.link);
    4333             :                         /*
    4334             :                          * spdk_bdev_io_complete() assumes that the completed I/O had
    4335             :                          *  been submitted to the bdev module.  Since in this case it
    4336             :                          *  hadn't, bump io_outstanding to account for the decrement
    4337             :                          *  that spdk_bdev_io_complete() will do.
    4338             :                          */
    4339          40 :                         if (bdev_io->type != SPDK_BDEV_IO_TYPE_RESET) {
    4340          39 :                                 bdev_io_increment_outstanding(ch, ch->shared_resource);
    4341          39 :                         }
    4342          40 :                         spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_ABORTED);
    4343          40 :                 }
    4344          40 :         }
    4345         188 : }
    4346             : 
    4347             : static bool
    4348          18 : bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_io *bio_to_abort)
    4349             : {
    4350             :         struct spdk_bdev_io *bdev_io;
    4351             : 
    4352          18 :         TAILQ_FOREACH(bdev_io, queue, internal.link) {
    4353           0 :                 if (bdev_io == bio_to_abort) {
    4354           0 :                         TAILQ_REMOVE(queue, bio_to_abort, internal.link);
    4355           0 :                         spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4356           0 :                         return true;
    4357             :                 }
    4358           0 :         }
    4359             : 
    4360          18 :         return false;
    4361          18 : }
    4362             : 
    4363             : static int
    4364           0 : bdev_abort_buf_io_cb(struct spdk_iobuf_channel *ch, struct spdk_iobuf_entry *entry, void *cb_ctx)
    4365             : {
    4366           0 :         struct spdk_bdev_io *bdev_io, *bio_to_abort = cb_ctx;
    4367             :         uint64_t buf_len;
    4368             : 
    4369           0 :         bdev_io = SPDK_CONTAINEROF(entry, struct spdk_bdev_io, internal.iobuf);
    4370           0 :         if (bdev_io == bio_to_abort) {
    4371           0 :                 buf_len = bdev_io_get_max_buf_len(bdev_io, bdev_io->internal.buf.len);
    4372           0 :                 spdk_iobuf_entry_abort(ch, entry, buf_len);
    4373           0 :                 spdk_bdev_io_complete(bio_to_abort, SPDK_BDEV_IO_STATUS_ABORTED);
    4374           0 :                 return 1;
    4375             :         }
    4376             : 
    4377           0 :         return 0;
    4378           0 : }
    4379             : 
    4380             : static bool
    4381          16 : bdev_abort_buf_io(struct spdk_bdev_mgmt_channel *mgmt_ch, struct spdk_bdev_io *bio_to_abort)
    4382             : {
    4383             :         int rc;
    4384             : 
    4385          16 :         rc = spdk_iobuf_for_each_entry(&mgmt_ch->iobuf, bdev_abort_buf_io_cb, bio_to_abort);
    4386          16 :         return rc == 1;
    4387             : }
    4388             : 
    4389             : static void
    4390           7 : bdev_qos_channel_destroy(void *cb_arg)
    4391             : {
    4392           7 :         struct spdk_bdev_qos *qos = cb_arg;
    4393             : 
    4394           7 :         spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    4395           7 :         spdk_poller_unregister(&qos->poller);
    4396             : 
    4397           7 :         SPDK_DEBUGLOG(bdev, "Free QoS %p.\n", qos);
    4398             : 
    4399           7 :         free(qos);
    4400           7 : }
    4401             : 
    4402             : static int
    4403           7 : bdev_qos_destroy(struct spdk_bdev *bdev)
    4404             : {
    4405             :         int i;
    4406             : 
    4407             :         /*
    4408             :          * Cleanly shutting down the QoS poller is tricky, because
    4409             :          * during the asynchronous operation the user could open
    4410             :          * a new descriptor and create a new channel, spawning
    4411             :          * a new QoS poller.
    4412             :          *
    4413             :          * The strategy is to create a new QoS structure here and swap it
    4414             :          * in. The shutdown path then continues to refer to the old one
    4415             :          * until it completes and then releases it.
    4416             :          */
    4417             :         struct spdk_bdev_qos *new_qos, *old_qos;
    4418             : 
    4419           7 :         old_qos = bdev->internal.qos;
    4420             : 
    4421           7 :         new_qos = calloc(1, sizeof(*new_qos));
    4422           7 :         if (!new_qos) {
    4423           0 :                 SPDK_ERRLOG("Unable to allocate memory to shut down QoS.\n");
    4424           0 :                 return -ENOMEM;
    4425             :         }
    4426             : 
    4427             :         /* Copy the old QoS data into the newly allocated structure */
    4428           7 :         memcpy(new_qos, old_qos, sizeof(*new_qos));
    4429             : 
    4430             :         /* Zero out the key parts of the QoS structure */
    4431           7 :         new_qos->ch = NULL;
    4432           7 :         new_qos->thread = NULL;
    4433           7 :         new_qos->poller = NULL;
    4434             :         /*
    4435             :          * The limit member of spdk_bdev_qos_limit structure is not zeroed.
    4436             :          * It will be used later for the new QoS structure.
    4437             :          */
    4438          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4439          28 :                 new_qos->rate_limits[i].remaining_this_timeslice = 0;
    4440          28 :                 new_qos->rate_limits[i].min_per_timeslice = 0;
    4441          28 :                 new_qos->rate_limits[i].max_per_timeslice = 0;
    4442          28 :         }
    4443             : 
    4444           7 :         bdev->internal.qos = new_qos;
    4445             : 
    4446           7 :         if (old_qos->thread == NULL) {
    4447           0 :                 free(old_qos);
    4448           0 :         } else {
    4449           7 :                 spdk_thread_send_msg(old_qos->thread, bdev_qos_channel_destroy, old_qos);
    4450             :         }
    4451             : 
    4452             :         /* It is safe to continue with destroying the bdev even though the QoS channel hasn't
    4453             :          * been destroyed yet. The destruction path will end up waiting for the final
    4454             :          * channel to be put before it releases resources. */
    4455             : 
    4456           7 :         return 0;
    4457           7 : }
    4458             : 
    4459             : void
    4460          78 : spdk_bdev_add_io_stat(struct spdk_bdev_io_stat *total, struct spdk_bdev_io_stat *add)
    4461             : {
    4462          78 :         total->bytes_read += add->bytes_read;
    4463          78 :         total->num_read_ops += add->num_read_ops;
    4464          78 :         total->bytes_written += add->bytes_written;
    4465          78 :         total->num_write_ops += add->num_write_ops;
    4466          78 :         total->bytes_unmapped += add->bytes_unmapped;
    4467          78 :         total->num_unmap_ops += add->num_unmap_ops;
    4468          78 :         total->bytes_copied += add->bytes_copied;
    4469          78 :         total->num_copy_ops += add->num_copy_ops;
    4470          78 :         total->read_latency_ticks += add->read_latency_ticks;
    4471          78 :         total->write_latency_ticks += add->write_latency_ticks;
    4472          78 :         total->unmap_latency_ticks += add->unmap_latency_ticks;
    4473          78 :         total->copy_latency_ticks += add->copy_latency_ticks;
    4474          78 :         if (total->max_read_latency_ticks < add->max_read_latency_ticks) {
    4475           7 :                 total->max_read_latency_ticks = add->max_read_latency_ticks;
    4476           7 :         }
    4477          78 :         if (total->min_read_latency_ticks > add->min_read_latency_ticks) {
    4478          39 :                 total->min_read_latency_ticks = add->min_read_latency_ticks;
    4479          39 :         }
    4480          78 :         if (total->max_write_latency_ticks < add->max_write_latency_ticks) {
    4481           4 :                 total->max_write_latency_ticks = add->max_write_latency_ticks;
    4482           4 :         }
    4483          78 :         if (total->min_write_latency_ticks > add->min_write_latency_ticks) {
    4484          24 :                 total->min_write_latency_ticks = add->min_write_latency_ticks;
    4485          24 :         }
    4486          78 :         if (total->max_unmap_latency_ticks < add->max_unmap_latency_ticks) {
    4487           0 :                 total->max_unmap_latency_ticks = add->max_unmap_latency_ticks;
    4488           0 :         }
    4489          78 :         if (total->min_unmap_latency_ticks > add->min_unmap_latency_ticks) {
    4490           3 :                 total->min_unmap_latency_ticks = add->min_unmap_latency_ticks;
    4491           3 :         }
    4492          78 :         if (total->max_copy_latency_ticks < add->max_copy_latency_ticks) {
    4493           0 :                 total->max_copy_latency_ticks = add->max_copy_latency_ticks;
    4494           0 :         }
    4495          78 :         if (total->min_copy_latency_ticks > add->min_copy_latency_ticks) {
    4496           4 :                 total->min_copy_latency_ticks = add->min_copy_latency_ticks;
    4497           4 :         }
    4498          78 : }
    4499             : 
    4500             : static void
    4501           5 : bdev_get_io_stat(struct spdk_bdev_io_stat *to_stat, struct spdk_bdev_io_stat *from_stat)
    4502             : {
    4503           5 :         memcpy(to_stat, from_stat, offsetof(struct spdk_bdev_io_stat, io_error));
    4504             : 
    4505           5 :         if (to_stat->io_error != NULL && from_stat->io_error != NULL) {
    4506           0 :                 memcpy(to_stat->io_error, from_stat->io_error,
    4507             :                        sizeof(struct spdk_bdev_io_error_stat));
    4508           0 :         }
    4509           5 : }
    4510             : 
    4511             : void
    4512         210 : spdk_bdev_reset_io_stat(struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode mode)
    4513             : {
    4514         210 :         if (mode == SPDK_BDEV_RESET_STAT_NONE) {
    4515           5 :                 return;
    4516             :         }
    4517             : 
    4518         205 :         stat->max_read_latency_ticks = 0;
    4519         205 :         stat->min_read_latency_ticks = UINT64_MAX;
    4520         205 :         stat->max_write_latency_ticks = 0;
    4521         205 :         stat->min_write_latency_ticks = UINT64_MAX;
    4522         205 :         stat->max_unmap_latency_ticks = 0;
    4523         205 :         stat->min_unmap_latency_ticks = UINT64_MAX;
    4524         205 :         stat->max_copy_latency_ticks = 0;
    4525         205 :         stat->min_copy_latency_ticks = UINT64_MAX;
    4526             : 
    4527         205 :         if (mode != SPDK_BDEV_RESET_STAT_ALL) {
    4528           2 :                 return;
    4529             :         }
    4530             : 
    4531         203 :         stat->bytes_read = 0;
    4532         203 :         stat->num_read_ops = 0;
    4533         203 :         stat->bytes_written = 0;
    4534         203 :         stat->num_write_ops = 0;
    4535         203 :         stat->bytes_unmapped = 0;
    4536         203 :         stat->num_unmap_ops = 0;
    4537         203 :         stat->bytes_copied = 0;
    4538         203 :         stat->num_copy_ops = 0;
    4539         203 :         stat->read_latency_ticks = 0;
    4540         203 :         stat->write_latency_ticks = 0;
    4541         203 :         stat->unmap_latency_ticks = 0;
    4542         203 :         stat->copy_latency_ticks = 0;
    4543             : 
    4544         203 :         if (stat->io_error != NULL) {
    4545         128 :                 memset(stat->io_error, 0, sizeof(struct spdk_bdev_io_error_stat));
    4546         128 :         }
    4547         210 : }
    4548             : 
    4549             : struct spdk_bdev_io_stat *
    4550         201 : bdev_alloc_io_stat(bool io_error_stat)
    4551             : {
    4552             :         struct spdk_bdev_io_stat *stat;
    4553             : 
    4554         201 :         stat = malloc(sizeof(struct spdk_bdev_io_stat));
    4555         201 :         if (stat == NULL) {
    4556           0 :                 return NULL;
    4557             :         }
    4558             : 
    4559         201 :         if (io_error_stat) {
    4560         127 :                 stat->io_error = malloc(sizeof(struct spdk_bdev_io_error_stat));
    4561         127 :                 if (stat->io_error == NULL) {
    4562           0 :                         free(stat);
    4563           0 :                         return NULL;
    4564             :                 }
    4565         127 :         } else {
    4566          74 :                 stat->io_error = NULL;
    4567             :         }
    4568             : 
    4569         201 :         spdk_bdev_reset_io_stat(stat, SPDK_BDEV_RESET_STAT_ALL);
    4570             : 
    4571         201 :         return stat;
    4572         201 : }
    4573             : 
    4574             : void
    4575         201 : bdev_free_io_stat(struct spdk_bdev_io_stat *stat)
    4576             : {
    4577         201 :         if (stat != NULL) {
    4578         201 :                 free(stat->io_error);
    4579         201 :                 free(stat);
    4580         201 :         }
    4581         201 : }
    4582             : 
    4583             : void
    4584           0 : spdk_bdev_dump_io_stat_json(struct spdk_bdev_io_stat *stat, struct spdk_json_write_ctx *w)
    4585             : {
    4586             :         int i;
    4587             : 
    4588           0 :         spdk_json_write_named_uint64(w, "bytes_read", stat->bytes_read);
    4589           0 :         spdk_json_write_named_uint64(w, "num_read_ops", stat->num_read_ops);
    4590           0 :         spdk_json_write_named_uint64(w, "bytes_written", stat->bytes_written);
    4591           0 :         spdk_json_write_named_uint64(w, "num_write_ops", stat->num_write_ops);
    4592           0 :         spdk_json_write_named_uint64(w, "bytes_unmapped", stat->bytes_unmapped);
    4593           0 :         spdk_json_write_named_uint64(w, "num_unmap_ops", stat->num_unmap_ops);
    4594           0 :         spdk_json_write_named_uint64(w, "bytes_copied", stat->bytes_copied);
    4595           0 :         spdk_json_write_named_uint64(w, "num_copy_ops", stat->num_copy_ops);
    4596           0 :         spdk_json_write_named_uint64(w, "read_latency_ticks", stat->read_latency_ticks);
    4597           0 :         spdk_json_write_named_uint64(w, "max_read_latency_ticks", stat->max_read_latency_ticks);
    4598           0 :         spdk_json_write_named_uint64(w, "min_read_latency_ticks",
    4599           0 :                                      stat->min_read_latency_ticks != UINT64_MAX ?
    4600           0 :                                      stat->min_read_latency_ticks : 0);
    4601           0 :         spdk_json_write_named_uint64(w, "write_latency_ticks", stat->write_latency_ticks);
    4602           0 :         spdk_json_write_named_uint64(w, "max_write_latency_ticks", stat->max_write_latency_ticks);
    4603           0 :         spdk_json_write_named_uint64(w, "min_write_latency_ticks",
    4604           0 :                                      stat->min_write_latency_ticks != UINT64_MAX ?
    4605           0 :                                      stat->min_write_latency_ticks : 0);
    4606           0 :         spdk_json_write_named_uint64(w, "unmap_latency_ticks", stat->unmap_latency_ticks);
    4607           0 :         spdk_json_write_named_uint64(w, "max_unmap_latency_ticks", stat->max_unmap_latency_ticks);
    4608           0 :         spdk_json_write_named_uint64(w, "min_unmap_latency_ticks",
    4609           0 :                                      stat->min_unmap_latency_ticks != UINT64_MAX ?
    4610           0 :                                      stat->min_unmap_latency_ticks : 0);
    4611           0 :         spdk_json_write_named_uint64(w, "copy_latency_ticks", stat->copy_latency_ticks);
    4612           0 :         spdk_json_write_named_uint64(w, "max_copy_latency_ticks", stat->max_copy_latency_ticks);
    4613           0 :         spdk_json_write_named_uint64(w, "min_copy_latency_ticks",
    4614           0 :                                      stat->min_copy_latency_ticks != UINT64_MAX ?
    4615           0 :                                      stat->min_copy_latency_ticks : 0);
    4616             : 
    4617           0 :         if (stat->io_error != NULL) {
    4618           0 :                 spdk_json_write_named_object_begin(w, "io_error");
    4619           0 :                 for (i = 0; i < -SPDK_MIN_BDEV_IO_STATUS; i++) {
    4620           0 :                         if (stat->io_error->error_status[i] != 0) {
    4621           0 :                                 spdk_json_write_named_uint32(w, bdev_io_status_get_string(-(i + 1)),
    4622           0 :                                                              stat->io_error->error_status[i]);
    4623           0 :                         }
    4624           0 :                 }
    4625           0 :                 spdk_json_write_object_end(w);
    4626           0 :         }
    4627           0 : }
    4628             : 
    4629             : static void
    4630          78 : bdev_channel_abort_queued_ios(struct spdk_bdev_channel *ch)
    4631             : {
    4632          78 :         struct spdk_bdev_shared_resource *shared_resource = ch->shared_resource;
    4633          78 :         struct spdk_bdev_mgmt_channel *mgmt_ch = shared_resource->mgmt_ch;
    4634             : 
    4635          78 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, ch);
    4636          78 :         bdev_abort_all_buf_io(mgmt_ch, ch);
    4637          78 : }
    4638             : 
    4639             : static void
    4640          74 : bdev_channel_destroy(void *io_device, void *ctx_buf)
    4641             : {
    4642          74 :         struct spdk_bdev_channel *ch = ctx_buf;
    4643             : 
    4644          74 :         SPDK_DEBUGLOG(bdev, "Destroying channel %p for bdev %s on thread %p\n", ch, ch->bdev->name,
    4645             :                       spdk_get_thread());
    4646             : 
    4647          74 :         spdk_trace_record(TRACE_BDEV_IOCH_DESTROY, ch->bdev->internal.trace_id, 0, 0,
    4648             :                           spdk_thread_get_id(spdk_io_channel_get_thread(ch->channel)));
    4649             : 
    4650             :         /* This channel is going away, so add its statistics into the bdev so that they don't get lost. */
    4651          74 :         spdk_spin_lock(&ch->bdev->internal.spinlock);
    4652          74 :         spdk_bdev_add_io_stat(ch->bdev->internal.stat, ch->stat);
    4653          74 :         spdk_spin_unlock(&ch->bdev->internal.spinlock);
    4654             : 
    4655          74 :         bdev_abort_all_queued_io(&ch->queued_resets, ch);
    4656             : 
    4657          74 :         bdev_channel_abort_queued_ios(ch);
    4658             : 
    4659          74 :         if (ch->histogram) {
    4660           0 :                 spdk_histogram_data_free(ch->histogram);
    4661           0 :         }
    4662             : 
    4663          74 :         bdev_channel_destroy_resource(ch);
    4664          74 : }
    4665             : 
    4666             : /*
    4667             :  * If the name already exists in the global bdev name tree, RB_INSERT() returns a pointer
    4668             :  * to it. Hence we do not have to call bdev_get_by_name() when using this function.
    4669             :  */
    4670             : static int
    4671         257 : bdev_name_add(struct spdk_bdev_name *bdev_name, struct spdk_bdev *bdev, const char *name)
    4672             : {
    4673             :         struct spdk_bdev_name *tmp;
    4674             : 
    4675         257 :         bdev_name->name = strdup(name);
    4676         257 :         if (bdev_name->name == NULL) {
    4677           0 :                 SPDK_ERRLOG("Unable to allocate bdev name\n");
    4678           0 :                 return -ENOMEM;
    4679             :         }
    4680             : 
    4681         257 :         bdev_name->bdev = bdev;
    4682             : 
    4683         257 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4684         257 :         tmp = RB_INSERT(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4685         257 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4686             : 
    4687         257 :         if (tmp != NULL) {
    4688           4 :                 SPDK_ERRLOG("Bdev name %s already exists\n", name);
    4689           4 :                 free(bdev_name->name);
    4690           4 :                 return -EEXIST;
    4691             :         }
    4692             : 
    4693         253 :         return 0;
    4694         257 : }
    4695             : 
    4696             : static void
    4697         253 : bdev_name_del_unsafe(struct spdk_bdev_name *bdev_name)
    4698             : {
    4699         253 :         RB_REMOVE(bdev_name_tree, &g_bdev_mgr.bdev_names, bdev_name);
    4700         253 :         free(bdev_name->name);
    4701         253 : }
    4702             : 
    4703             : static void
    4704           5 : bdev_name_del(struct spdk_bdev_name *bdev_name)
    4705             : {
    4706           5 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    4707           5 :         bdev_name_del_unsafe(bdev_name);
    4708           5 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    4709           5 : }
    4710             : 
    4711             : int
    4712         133 : spdk_bdev_alias_add(struct spdk_bdev *bdev, const char *alias)
    4713             : {
    4714             :         struct spdk_bdev_alias *tmp;
    4715             :         int ret;
    4716             : 
    4717         133 :         if (alias == NULL) {
    4718           1 :                 SPDK_ERRLOG("Empty alias passed\n");
    4719           1 :                 return -EINVAL;
    4720             :         }
    4721             : 
    4722         132 :         tmp = calloc(1, sizeof(*tmp));
    4723         132 :         if (tmp == NULL) {
    4724           0 :                 SPDK_ERRLOG("Unable to allocate alias\n");
    4725           0 :                 return -ENOMEM;
    4726             :         }
    4727             : 
    4728         132 :         ret = bdev_name_add(&tmp->alias, bdev, alias);
    4729         132 :         if (ret != 0) {
    4730           4 :                 free(tmp);
    4731           4 :                 return ret;
    4732             :         }
    4733             : 
    4734         128 :         TAILQ_INSERT_TAIL(&bdev->aliases, tmp, tailq);
    4735             : 
    4736         128 :         return 0;
    4737         133 : }
    4738             : 
    4739             : static int
    4740         129 : bdev_alias_del(struct spdk_bdev *bdev, const char *alias,
    4741             :                void (*alias_del_fn)(struct spdk_bdev_name *n))
    4742             : {
    4743             :         struct spdk_bdev_alias *tmp;
    4744             : 
    4745         134 :         TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
    4746         130 :                 if (strcmp(alias, tmp->alias.name) == 0) {
    4747         125 :                         TAILQ_REMOVE(&bdev->aliases, tmp, tailq);
    4748         125 :                         alias_del_fn(&tmp->alias);
    4749         125 :                         free(tmp);
    4750         125 :                         return 0;
    4751             :                 }
    4752           5 :         }
    4753             : 
    4754           4 :         return -ENOENT;
    4755         129 : }
    4756             : 
    4757             : int
    4758           4 : spdk_bdev_alias_del(struct spdk_bdev *bdev, const char *alias)
    4759             : {
    4760             :         int rc;
    4761             : 
    4762           4 :         rc = bdev_alias_del(bdev, alias, bdev_name_del);
    4763           4 :         if (rc == -ENOENT) {
    4764           2 :                 SPDK_INFOLOG(bdev, "Alias %s does not exist\n", alias);
    4765           2 :         }
    4766             : 
    4767           4 :         return rc;
    4768             : }
    4769             : 
    4770             : void
    4771           2 : spdk_bdev_alias_del_all(struct spdk_bdev *bdev)
    4772             : {
    4773             :         struct spdk_bdev_alias *p, *tmp;
    4774             : 
    4775           5 :         TAILQ_FOREACH_SAFE(p, &bdev->aliases, tailq, tmp) {
    4776           3 :                 TAILQ_REMOVE(&bdev->aliases, p, tailq);
    4777           3 :                 bdev_name_del(&p->alias);
    4778           3 :                 free(p);
    4779           3 :         }
    4780           2 : }
    4781             : 
    4782             : struct spdk_io_channel *
    4783          76 : spdk_bdev_get_io_channel(struct spdk_bdev_desc *desc)
    4784             : {
    4785          76 :         return spdk_get_io_channel(__bdev_to_io_dev(spdk_bdev_desc_get_bdev(desc)));
    4786             : }
    4787             : 
    4788             : void *
    4789           0 : spdk_bdev_get_module_ctx(struct spdk_bdev_desc *desc)
    4790             : {
    4791           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    4792           0 :         void *ctx = NULL;
    4793             : 
    4794           0 :         if (bdev->fn_table->get_module_ctx) {
    4795           0 :                 ctx = bdev->fn_table->get_module_ctx(bdev->ctxt);
    4796           0 :         }
    4797             : 
    4798           0 :         return ctx;
    4799             : }
    4800             : 
    4801             : const char *
    4802           0 : spdk_bdev_get_module_name(const struct spdk_bdev *bdev)
    4803             : {
    4804           0 :         return bdev->module->name;
    4805             : }
    4806             : 
    4807             : const char *
    4808         253 : spdk_bdev_get_name(const struct spdk_bdev *bdev)
    4809             : {
    4810         253 :         return bdev->name;
    4811             : }
    4812             : 
    4813             : const char *
    4814           0 : spdk_bdev_get_product_name(const struct spdk_bdev *bdev)
    4815             : {
    4816           0 :         return bdev->product_name;
    4817             : }
    4818             : 
    4819             : const struct spdk_bdev_aliases_list *
    4820           0 : spdk_bdev_get_aliases(const struct spdk_bdev *bdev)
    4821             : {
    4822           0 :         return &bdev->aliases;
    4823             : }
    4824             : 
    4825             : uint32_t
    4826           5 : spdk_bdev_get_block_size(const struct spdk_bdev *bdev)
    4827             : {
    4828           5 :         return bdev->blocklen;
    4829             : }
    4830             : 
    4831             : uint32_t
    4832           0 : spdk_bdev_get_write_unit_size(const struct spdk_bdev *bdev)
    4833             : {
    4834           0 :         return bdev->write_unit_size;
    4835             : }
    4836             : 
    4837             : uint64_t
    4838           0 : spdk_bdev_get_num_blocks(const struct spdk_bdev *bdev)
    4839             : {
    4840           0 :         return bdev->blockcnt;
    4841             : }
    4842             : 
    4843             : const char *
    4844           0 : spdk_bdev_get_qos_rpc_type(enum spdk_bdev_qos_rate_limit_type type)
    4845             : {
    4846           0 :         return qos_rpc_type[type];
    4847             : }
    4848             : 
    4849             : void
    4850           0 : spdk_bdev_get_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    4851             : {
    4852             :         int i;
    4853             : 
    4854           0 :         memset(limits, 0, sizeof(*limits) * SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES);
    4855             : 
    4856           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    4857           0 :         if (bdev->internal.qos) {
    4858           0 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    4859           0 :                         if (bdev->internal.qos->rate_limits[i].limit !=
    4860             :                             SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    4861           0 :                                 limits[i] = bdev->internal.qos->rate_limits[i].limit;
    4862           0 :                                 if (bdev_qos_is_iops_rate_limit(i) == false) {
    4863             :                                         /* Change from Byte to Megabyte which is user visible. */
    4864           0 :                                         limits[i] = limits[i] / 1024 / 1024;
    4865           0 :                                 }
    4866           0 :                         }
    4867           0 :                 }
    4868           0 :         }
    4869           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    4870           0 : }
    4871             : 
    4872             : size_t
    4873         317 : spdk_bdev_get_buf_align(const struct spdk_bdev *bdev)
    4874             : {
    4875         317 :         return 1 << bdev->required_alignment;
    4876             : }
    4877             : 
    4878             : uint32_t
    4879           0 : spdk_bdev_get_optimal_io_boundary(const struct spdk_bdev *bdev)
    4880             : {
    4881           0 :         return bdev->optimal_io_boundary;
    4882             : }
    4883             : 
    4884             : bool
    4885           0 : spdk_bdev_has_write_cache(const struct spdk_bdev *bdev)
    4886             : {
    4887           0 :         return bdev->write_cache;
    4888             : }
    4889             : 
    4890             : const struct spdk_uuid *
    4891           0 : spdk_bdev_get_uuid(const struct spdk_bdev *bdev)
    4892             : {
    4893           0 :         return &bdev->uuid;
    4894             : }
    4895             : 
    4896             : uint16_t
    4897           0 : spdk_bdev_get_acwu(const struct spdk_bdev *bdev)
    4898             : {
    4899           0 :         return bdev->acwu;
    4900             : }
    4901             : 
    4902             : uint32_t
    4903          29 : spdk_bdev_get_md_size(const struct spdk_bdev *bdev)
    4904             : {
    4905          29 :         return bdev->md_len;
    4906             : }
    4907             : 
    4908             : bool
    4909         130 : spdk_bdev_is_md_interleaved(const struct spdk_bdev *bdev)
    4910             : {
    4911         130 :         return (bdev->md_len != 0) && bdev->md_interleave;
    4912             : }
    4913             : 
    4914             : bool
    4915         159 : spdk_bdev_is_md_separate(const struct spdk_bdev *bdev)
    4916             : {
    4917         159 :         return (bdev->md_len != 0) && !bdev->md_interleave;
    4918             : }
    4919             : 
    4920             : bool
    4921           0 : spdk_bdev_is_zoned(const struct spdk_bdev *bdev)
    4922             : {
    4923           0 :         return bdev->zoned;
    4924             : }
    4925             : 
    4926             : uint32_t
    4927         121 : spdk_bdev_get_data_block_size(const struct spdk_bdev *bdev)
    4928             : {
    4929         121 :         if (spdk_bdev_is_md_interleaved(bdev)) {
    4930           0 :                 return bdev->blocklen - bdev->md_len;
    4931             :         } else {
    4932         121 :                 return bdev->blocklen;
    4933             :         }
    4934         121 : }
    4935             : 
    4936             : uint32_t
    4937           0 : spdk_bdev_get_physical_block_size(const struct spdk_bdev *bdev)
    4938             : {
    4939           0 :         return bdev->phys_blocklen;
    4940             : }
    4941             : 
    4942             : static uint32_t
    4943           9 : _bdev_get_block_size_with_md(const struct spdk_bdev *bdev)
    4944             : {
    4945           9 :         if (!spdk_bdev_is_md_interleaved(bdev)) {
    4946           6 :                 return bdev->blocklen + bdev->md_len;
    4947             :         } else {
    4948           3 :                 return bdev->blocklen;
    4949             :         }
    4950           9 : }
    4951             : 
    4952             : /* We have to use the typedef in the function declaration to appease astyle. */
    4953             : typedef enum spdk_dif_type spdk_dif_type_t;
    4954             : typedef enum spdk_dif_pi_format spdk_dif_pi_format_t;
    4955             : 
    4956             : spdk_dif_type_t
    4957           0 : spdk_bdev_get_dif_type(const struct spdk_bdev *bdev)
    4958             : {
    4959           0 :         if (bdev->md_len != 0) {
    4960           0 :                 return bdev->dif_type;
    4961             :         } else {
    4962           0 :                 return SPDK_DIF_DISABLE;
    4963             :         }
    4964           0 : }
    4965             : 
    4966             : spdk_dif_pi_format_t
    4967           0 : spdk_bdev_get_dif_pi_format(const struct spdk_bdev *bdev)
    4968             : {
    4969           0 :         return bdev->dif_pi_format;
    4970             : }
    4971             : 
    4972             : bool
    4973           0 : spdk_bdev_is_dif_head_of_md(const struct spdk_bdev *bdev)
    4974             : {
    4975           0 :         if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
    4976           0 :                 return bdev->dif_is_head_of_md;
    4977             :         } else {
    4978           0 :                 return false;
    4979             :         }
    4980           0 : }
    4981             : 
    4982             : bool
    4983           0 : spdk_bdev_is_dif_check_enabled(const struct spdk_bdev *bdev,
    4984             :                                enum spdk_dif_check_type check_type)
    4985             : {
    4986           0 :         if (spdk_bdev_get_dif_type(bdev) == SPDK_DIF_DISABLE) {
    4987           0 :                 return false;
    4988             :         }
    4989             : 
    4990           0 :         switch (check_type) {
    4991             :         case SPDK_DIF_CHECK_TYPE_REFTAG:
    4992           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_REFTAG_CHECK) != 0;
    4993             :         case SPDK_DIF_CHECK_TYPE_APPTAG:
    4994           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_APPTAG_CHECK) != 0;
    4995             :         case SPDK_DIF_CHECK_TYPE_GUARD:
    4996           0 :                 return (bdev->dif_check_flags & SPDK_DIF_FLAGS_GUARD_CHECK) != 0;
    4997             :         default:
    4998           0 :                 return false;
    4999             :         }
    5000           0 : }
    5001             : 
    5002             : static uint32_t
    5003           3 : bdev_get_max_write(const struct spdk_bdev *bdev, uint64_t num_bytes)
    5004             : {
    5005             :         uint64_t aligned_length, max_write_blocks;
    5006             : 
    5007           3 :         aligned_length = num_bytes - (spdk_bdev_get_buf_align(bdev) - 1);
    5008           3 :         max_write_blocks = aligned_length / _bdev_get_block_size_with_md(bdev);
    5009           3 :         max_write_blocks -= max_write_blocks % bdev->write_unit_size;
    5010             : 
    5011           3 :         return max_write_blocks;
    5012             : }
    5013             : 
    5014             : uint32_t
    5015           1 : spdk_bdev_get_max_copy(const struct spdk_bdev *bdev)
    5016             : {
    5017           1 :         return bdev->max_copy;
    5018             : }
    5019             : 
    5020             : uint64_t
    5021           0 : spdk_bdev_get_qd(const struct spdk_bdev *bdev)
    5022             : {
    5023           0 :         return bdev->internal.measured_queue_depth;
    5024             : }
    5025             : 
    5026             : uint64_t
    5027           0 : spdk_bdev_get_qd_sampling_period(const struct spdk_bdev *bdev)
    5028             : {
    5029           0 :         return bdev->internal.period;
    5030             : }
    5031             : 
    5032             : uint64_t
    5033           0 : spdk_bdev_get_weighted_io_time(const struct spdk_bdev *bdev)
    5034             : {
    5035           0 :         return bdev->internal.weighted_io_time;
    5036             : }
    5037             : 
    5038             : uint64_t
    5039           0 : spdk_bdev_get_io_time(const struct spdk_bdev *bdev)
    5040             : {
    5041           0 :         return bdev->internal.io_time;
    5042             : }
    5043             : 
    5044           0 : union spdk_bdev_nvme_ctratt spdk_bdev_get_nvme_ctratt(struct spdk_bdev *bdev)
    5045             : {
    5046           0 :         return bdev->ctratt;
    5047             : }
    5048             : 
    5049             : uint32_t
    5050           0 : spdk_bdev_get_nvme_nsid(struct spdk_bdev *bdev)
    5051             : {
    5052           0 :         return bdev->nsid;
    5053             : }
    5054             : 
    5055             : uint32_t
    5056           0 : spdk_bdev_desc_get_block_size(struct spdk_bdev_desc *desc)
    5057             : {
    5058           0 :         struct spdk_bdev *bdev = desc->bdev;
    5059             : 
    5060           0 :         return desc->opts.hide_metadata ? bdev->blocklen - bdev->md_len : bdev->blocklen;
    5061             : }
    5062             : 
    5063             : uint32_t
    5064           0 : spdk_bdev_desc_get_md_size(struct spdk_bdev_desc *desc)
    5065             : {
    5066           0 :         struct spdk_bdev *bdev = desc->bdev;
    5067             : 
    5068           0 :         return desc->opts.hide_metadata ? 0 : bdev->md_len;
    5069             : }
    5070             : 
    5071             : bool
    5072           0 : spdk_bdev_desc_is_md_interleaved(struct spdk_bdev_desc *desc)
    5073             : {
    5074           0 :         struct spdk_bdev *bdev = desc->bdev;
    5075             : 
    5076           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_interleaved(bdev);
    5077             : }
    5078             : 
    5079             : bool
    5080           0 : spdk_bdev_desc_is_md_separate(struct spdk_bdev_desc *desc)
    5081             : {
    5082           0 :         struct spdk_bdev *bdev = desc->bdev;
    5083             : 
    5084           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_md_separate(bdev);
    5085             : }
    5086             : 
    5087             : spdk_dif_type_t
    5088           0 : spdk_bdev_desc_get_dif_type(struct spdk_bdev_desc *desc)
    5089             : {
    5090           0 :         struct spdk_bdev *bdev = desc->bdev;
    5091             : 
    5092           0 :         return desc->opts.hide_metadata ? SPDK_DIF_DISABLE : spdk_bdev_get_dif_type(bdev);
    5093             : }
    5094             : 
    5095             : spdk_dif_pi_format_t
    5096           0 : spdk_bdev_desc_get_dif_pi_format(struct spdk_bdev_desc *desc)
    5097             : {
    5098           0 :         struct spdk_bdev *bdev = desc->bdev;
    5099             : 
    5100           0 :         return desc->opts.hide_metadata ? SPDK_DIF_PI_FORMAT_16 : spdk_bdev_get_dif_pi_format(bdev);
    5101             : }
    5102             : 
    5103             : bool
    5104           0 : spdk_bdev_desc_is_dif_head_of_md(struct spdk_bdev_desc *desc)
    5105             : {
    5106           0 :         struct spdk_bdev *bdev = desc->bdev;
    5107             : 
    5108           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_head_of_md(bdev);
    5109             : }
    5110             : 
    5111             : bool
    5112           0 : spdk_bdev_desc_is_dif_check_enabled(struct spdk_bdev_desc *desc,
    5113             :                                     enum spdk_dif_check_type check_type)
    5114             : {
    5115           0 :         struct spdk_bdev *bdev = desc->bdev;
    5116             : 
    5117           0 :         return desc->opts.hide_metadata ? false : spdk_bdev_is_dif_check_enabled(bdev, check_type);
    5118             : }
    5119             : 
    5120             : static void bdev_update_qd_sampling_period(void *ctx);
    5121             : 
    5122             : static void
    5123           1 : _calculate_measured_qd_cpl(struct spdk_bdev *bdev, void *_ctx, int status)
    5124             : {
    5125           1 :         bdev->internal.measured_queue_depth = bdev->internal.temporary_queue_depth;
    5126             : 
    5127           1 :         if (bdev->internal.measured_queue_depth) {
    5128           0 :                 bdev->internal.io_time += bdev->internal.period;
    5129           0 :                 bdev->internal.weighted_io_time += bdev->internal.period * bdev->internal.measured_queue_depth;
    5130           0 :         }
    5131             : 
    5132           1 :         bdev->internal.qd_poll_in_progress = false;
    5133             : 
    5134           1 :         bdev_update_qd_sampling_period(bdev);
    5135           1 : }
    5136             : 
    5137             : static void
    5138           1 : _calculate_measured_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5139             :                        struct spdk_io_channel *io_ch, void *_ctx)
    5140             : {
    5141           1 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(io_ch);
    5142             : 
    5143           1 :         bdev->internal.temporary_queue_depth += ch->io_outstanding;
    5144           1 :         spdk_bdev_for_each_channel_continue(i, 0);
    5145           1 : }
    5146             : 
    5147             : static int
    5148           1 : bdev_calculate_measured_queue_depth(void *ctx)
    5149             : {
    5150           1 :         struct spdk_bdev *bdev = ctx;
    5151             : 
    5152           1 :         bdev->internal.qd_poll_in_progress = true;
    5153           1 :         bdev->internal.temporary_queue_depth = 0;
    5154           1 :         spdk_bdev_for_each_channel(bdev, _calculate_measured_qd, bdev, _calculate_measured_qd_cpl);
    5155           1 :         return SPDK_POLLER_BUSY;
    5156             : }
    5157             : 
    5158             : static void
    5159           5 : bdev_update_qd_sampling_period(void *ctx)
    5160             : {
    5161           5 :         struct spdk_bdev *bdev = ctx;
    5162             : 
    5163           5 :         if (bdev->internal.period == bdev->internal.new_period) {
    5164           0 :                 return;
    5165             :         }
    5166             : 
    5167           5 :         if (bdev->internal.qd_poll_in_progress) {
    5168           1 :                 return;
    5169             :         }
    5170             : 
    5171           4 :         bdev->internal.period = bdev->internal.new_period;
    5172             : 
    5173           4 :         spdk_poller_unregister(&bdev->internal.qd_poller);
    5174           4 :         if (bdev->internal.period != 0) {
    5175           2 :                 bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5176             :                                            bdev, bdev->internal.period);
    5177           2 :         } else {
    5178           2 :                 spdk_bdev_close(bdev->internal.qd_desc);
    5179           2 :                 bdev->internal.qd_desc = NULL;
    5180             :         }
    5181           5 : }
    5182             : 
    5183             : static void
    5184           0 : _tmp_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    5185             : {
    5186           0 :         SPDK_NOTICELOG("Unexpected event type: %d\n", type);
    5187           0 : }
    5188             : 
    5189             : void
    5190         130 : spdk_bdev_set_qd_sampling_period(struct spdk_bdev *bdev, uint64_t period)
    5191             : {
    5192             :         int rc;
    5193             : 
    5194         130 :         if (bdev->internal.new_period == period) {
    5195         124 :                 return;
    5196             :         }
    5197             : 
    5198           6 :         bdev->internal.new_period = period;
    5199             : 
    5200           6 :         if (bdev->internal.qd_desc != NULL) {
    5201           4 :                 assert(bdev->internal.period != 0);
    5202             : 
    5203           8 :                 spdk_thread_send_msg(bdev->internal.qd_desc->thread,
    5204           4 :                                      bdev_update_qd_sampling_period, bdev);
    5205           4 :                 return;
    5206             :         }
    5207             : 
    5208           2 :         assert(bdev->internal.period == 0);
    5209             : 
    5210           4 :         rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false, _tmp_bdev_event_cb,
    5211           2 :                                 NULL, &bdev->internal.qd_desc);
    5212           2 :         if (rc != 0) {
    5213           0 :                 return;
    5214             :         }
    5215             : 
    5216           2 :         bdev->internal.period = period;
    5217           2 :         bdev->internal.qd_poller = SPDK_POLLER_REGISTER(bdev_calculate_measured_queue_depth,
    5218             :                                    bdev, period);
    5219         130 : }
    5220             : 
    5221             : struct bdev_get_current_qd_ctx {
    5222             :         uint64_t current_qd;
    5223             :         spdk_bdev_get_current_qd_cb cb_fn;
    5224             :         void *cb_arg;
    5225             : };
    5226             : 
    5227             : static void
    5228           0 : bdev_get_current_qd_done(struct spdk_bdev *bdev, void *_ctx, int status)
    5229             : {
    5230           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5231             : 
    5232           0 :         ctx->cb_fn(bdev, ctx->current_qd, ctx->cb_arg, 0);
    5233             : 
    5234           0 :         free(ctx);
    5235           0 : }
    5236             : 
    5237             : static void
    5238           0 : bdev_get_current_qd(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    5239             :                     struct spdk_io_channel *io_ch, void *_ctx)
    5240             : {
    5241           0 :         struct bdev_get_current_qd_ctx *ctx = _ctx;
    5242           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    5243             : 
    5244           0 :         ctx->current_qd += bdev_ch->io_outstanding;
    5245             : 
    5246           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    5247           0 : }
    5248             : 
    5249             : void
    5250           0 : spdk_bdev_get_current_qd(struct spdk_bdev *bdev, spdk_bdev_get_current_qd_cb cb_fn,
    5251             :                          void *cb_arg)
    5252             : {
    5253             :         struct bdev_get_current_qd_ctx *ctx;
    5254             : 
    5255           0 :         assert(cb_fn != NULL);
    5256             : 
    5257           0 :         ctx = calloc(1, sizeof(*ctx));
    5258           0 :         if (ctx == NULL) {
    5259           0 :                 cb_fn(bdev, 0, cb_arg, -ENOMEM);
    5260           0 :                 return;
    5261             :         }
    5262             : 
    5263           0 :         ctx->cb_fn = cb_fn;
    5264           0 :         ctx->cb_arg = cb_arg;
    5265             : 
    5266           0 :         spdk_bdev_for_each_channel(bdev, bdev_get_current_qd, ctx, bdev_get_current_qd_done);
    5267           0 : }
    5268             : 
    5269             : static void
    5270          25 : _event_notify(struct spdk_bdev_desc *desc, enum spdk_bdev_event_type type)
    5271             : {
    5272          25 :         assert(desc->thread == spdk_get_thread());
    5273             : 
    5274          25 :         spdk_spin_lock(&desc->spinlock);
    5275          25 :         desc->refs--;
    5276          25 :         if (!desc->closed) {
    5277          14 :                 spdk_spin_unlock(&desc->spinlock);
    5278          28 :                 desc->callback.event_fn(type,
    5279          14 :                                         desc->bdev,
    5280          14 :                                         desc->callback.ctx);
    5281          14 :                 return;
    5282          11 :         } else if (desc->refs == 0) {
    5283             :                 /* This descriptor was closed after this event_notify message was sent.
    5284             :                  * spdk_bdev_close() could not free the descriptor since this message was
    5285             :                  * in flight, so we free it now using bdev_desc_free().
    5286             :                  */
    5287          10 :                 spdk_spin_unlock(&desc->spinlock);
    5288          10 :                 bdev_desc_free(desc);
    5289          10 :                 return;
    5290             :         }
    5291           1 :         spdk_spin_unlock(&desc->spinlock);
    5292          25 : }
    5293             : 
    5294             : static void
    5295          25 : event_notify(struct spdk_bdev_desc *desc, spdk_msg_fn event_notify_fn)
    5296             : {
    5297          25 :         spdk_spin_lock(&desc->spinlock);
    5298          25 :         desc->refs++;
    5299          25 :         spdk_thread_send_msg(desc->thread, event_notify_fn, desc);
    5300          25 :         spdk_spin_unlock(&desc->spinlock);
    5301          25 : }
    5302             : 
    5303             : static void
    5304           6 : _resize_notify(void *ctx)
    5305             : {
    5306           6 :         struct spdk_bdev_desc *desc = ctx;
    5307             : 
    5308           6 :         _event_notify(desc, SPDK_BDEV_EVENT_RESIZE);
    5309           6 : }
    5310             : 
    5311             : int
    5312          11 : spdk_bdev_notify_blockcnt_change(struct spdk_bdev *bdev, uint64_t size)
    5313             : {
    5314             :         struct spdk_bdev_desc *desc;
    5315             :         int ret;
    5316             : 
    5317          11 :         if (size == bdev->blockcnt) {
    5318           0 :                 return 0;
    5319             :         }
    5320             : 
    5321          11 :         spdk_spin_lock(&bdev->internal.spinlock);
    5322             : 
    5323             :         /* bdev has open descriptors */
    5324          11 :         if (!TAILQ_EMPTY(&bdev->internal.open_descs) &&
    5325           7 :             bdev->blockcnt > size) {
    5326           1 :                 ret = -EBUSY;
    5327           1 :         } else {
    5328          10 :                 bdev->blockcnt = size;
    5329          16 :                 TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
    5330           6 :                         event_notify(desc, _resize_notify);
    5331           6 :                 }
    5332          10 :                 ret = 0;
    5333             :         }
    5334             : 
    5335          11 :         spdk_spin_unlock(&bdev->internal.spinlock);
    5336             : 
    5337          11 :         return ret;
    5338          11 : }
    5339             : 
    5340             : /*
    5341             :  * Convert I/O offset and length from bytes to blocks.
    5342             :  *
    5343             :  * Returns zero on success or non-zero if the byte parameters aren't divisible by the block size.
    5344             :  */
    5345             : static uint64_t
    5346          20 : bdev_bytes_to_blocks(struct spdk_bdev_desc *desc, uint64_t offset_bytes,
    5347             :                      uint64_t *offset_blocks, uint64_t num_bytes, uint64_t *num_blocks)
    5348             : {
    5349          20 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5350          20 :         uint32_t block_size = bdev->blocklen;
    5351             :         uint8_t shift_cnt;
    5352             : 
    5353             :         /* Avoid expensive div operations if possible. These spdk_u32 functions are very cheap. */
    5354          20 :         if (spdk_likely(spdk_u32_is_pow2(block_size))) {
    5355          17 :                 shift_cnt = spdk_u32log2(block_size);
    5356          17 :                 *offset_blocks = offset_bytes >> shift_cnt;
    5357          17 :                 *num_blocks = num_bytes >> shift_cnt;
    5358          34 :                 return (offset_bytes - (*offset_blocks << shift_cnt)) |
    5359          17 :                        (num_bytes - (*num_blocks << shift_cnt));
    5360             :         } else {
    5361           3 :                 *offset_blocks = offset_bytes / block_size;
    5362           3 :                 *num_blocks = num_bytes / block_size;
    5363           3 :                 return (offset_bytes % block_size) | (num_bytes % block_size);
    5364             :         }
    5365          20 : }
    5366             : 
    5367             : static bool
    5368         689 : bdev_io_valid_blocks(struct spdk_bdev *bdev, uint64_t offset_blocks, uint64_t num_blocks)
    5369             : {
    5370             :         /* Return failure if offset_blocks + num_blocks is less than offset_blocks; indicates there
    5371             :          * has been an overflow and hence the offset has been wrapped around */
    5372         689 :         if (offset_blocks + num_blocks < offset_blocks) {
    5373           1 :                 return false;
    5374             :         }
    5375             : 
    5376             :         /* Return failure if offset_blocks + num_blocks exceeds the size of the bdev */
    5377         688 :         if (offset_blocks + num_blocks > bdev->blockcnt) {
    5378           2 :                 return false;
    5379             :         }
    5380             : 
    5381         686 :         return true;
    5382         689 : }
    5383             : 
    5384             : static void
    5385           2 : bdev_seek_complete_cb(void *ctx)
    5386             : {
    5387           2 :         struct spdk_bdev_io *bdev_io = ctx;
    5388             : 
    5389           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    5390           2 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    5391           2 : }
    5392             : 
    5393             : static int
    5394           4 : bdev_seek(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5395             :           uint64_t offset_blocks, enum spdk_bdev_io_type io_type,
    5396             :           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5397             : {
    5398           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5399             :         struct spdk_bdev_io *bdev_io;
    5400           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5401             : 
    5402           4 :         assert(io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA || io_type == SPDK_BDEV_IO_TYPE_SEEK_HOLE);
    5403             : 
    5404             :         /* Check if offset_blocks is valid looking at the validity of one block */
    5405           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, 1)) {
    5406           0 :                 return -EINVAL;
    5407             :         }
    5408             : 
    5409           4 :         bdev_io = bdev_channel_get_io(channel);
    5410           4 :         if (!bdev_io) {
    5411           0 :                 return -ENOMEM;
    5412             :         }
    5413             : 
    5414           4 :         bdev_io->internal.ch = channel;
    5415           4 :         bdev_io->internal.desc = desc;
    5416           4 :         bdev_io->type = io_type;
    5417           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5418           4 :         bdev_io->u.bdev.memory_domain = NULL;
    5419           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5420           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    5421           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5422             : 
    5423           4 :         if (!spdk_bdev_io_type_supported(bdev, io_type)) {
    5424             :                 /* In case bdev doesn't support seek to next data/hole offset,
    5425             :                  * it is assumed that only data and no holes are present */
    5426           2 :                 if (io_type == SPDK_BDEV_IO_TYPE_SEEK_DATA) {
    5427           1 :                         bdev_io->u.bdev.seek.offset = offset_blocks;
    5428           1 :                 } else {
    5429           1 :                         bdev_io->u.bdev.seek.offset = UINT64_MAX;
    5430             :                 }
    5431             : 
    5432           2 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_seek_complete_cb, bdev_io);
    5433           2 :                 return 0;
    5434             :         }
    5435             : 
    5436           2 :         bdev_io_submit(bdev_io);
    5437           2 :         return 0;
    5438           4 : }
    5439             : 
    5440             : int
    5441           2 : spdk_bdev_seek_data(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5442             :                     uint64_t offset_blocks,
    5443             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5444             : {
    5445           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_DATA, cb, cb_arg);
    5446             : }
    5447             : 
    5448             : int
    5449           2 : spdk_bdev_seek_hole(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5450             :                     uint64_t offset_blocks,
    5451             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    5452             : {
    5453           2 :         return bdev_seek(desc, ch, offset_blocks, SPDK_BDEV_IO_TYPE_SEEK_HOLE, cb, cb_arg);
    5454             : }
    5455             : 
    5456             : uint64_t
    5457           4 : spdk_bdev_io_get_seek_offset(const struct spdk_bdev_io *bdev_io)
    5458             : {
    5459           4 :         return bdev_io->u.bdev.seek.offset;
    5460             : }
    5461             : 
    5462             : static int
    5463         204 : bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch, void *buf,
    5464             :                          void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5465             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    5466             : {
    5467         204 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5468             :         struct spdk_bdev_io *bdev_io;
    5469         204 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5470             : 
    5471         204 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5472           0 :                 return -EINVAL;
    5473             :         }
    5474             : 
    5475         204 :         bdev_io = bdev_channel_get_io(channel);
    5476         204 :         if (!bdev_io) {
    5477           1 :                 return -ENOMEM;
    5478             :         }
    5479             : 
    5480         203 :         bdev_io->internal.ch = channel;
    5481         203 :         bdev_io->internal.desc = desc;
    5482         203 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5483         203 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5484         203 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5485         203 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev->blocklen;
    5486         203 :         bdev_io->u.bdev.iovcnt = 1;
    5487         203 :         bdev_io->u.bdev.md_buf = md_buf;
    5488         203 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5489         203 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5490         203 :         bdev_io->u.bdev.memory_domain = NULL;
    5491         203 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5492         203 :         bdev_io->u.bdev.accel_sequence = NULL;
    5493         203 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5494         203 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5495             : 
    5496         203 :         bdev_io_submit(bdev_io);
    5497         203 :         return 0;
    5498         204 : }
    5499             : 
    5500             : int
    5501           3 : spdk_bdev_read(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5502             :                void *buf, uint64_t offset, uint64_t nbytes,
    5503             :                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5504             : {
    5505             :         uint64_t offset_blocks, num_blocks;
    5506             : 
    5507           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5508           0 :                 return -EINVAL;
    5509             :         }
    5510             : 
    5511           3 :         return spdk_bdev_read_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    5512           3 : }
    5513             : 
    5514             : int
    5515         200 : spdk_bdev_read_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5516             :                       void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    5517             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    5518             : {
    5519         200 :         return bdev_read_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks, cb, cb_arg);
    5520             : }
    5521             : 
    5522             : int
    5523           4 : spdk_bdev_read_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5524             :                               void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5525             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    5526             : {
    5527           8 :         struct iovec iov = {
    5528           4 :                 .iov_base = buf,
    5529             :         };
    5530             : 
    5531           4 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    5532           0 :                 return -EINVAL;
    5533             :         }
    5534             : 
    5535           4 :         if (md_buf && !_is_buf_allocated(&iov)) {
    5536           0 :                 return -EINVAL;
    5537             :         }
    5538             : 
    5539           8 :         return bdev_read_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    5540           4 :                                         cb, cb_arg);
    5541           4 : }
    5542             : 
    5543             : int
    5544           5 : spdk_bdev_readv(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5545             :                 struct iovec *iov, int iovcnt,
    5546             :                 uint64_t offset, uint64_t nbytes,
    5547             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5548             : {
    5549             :         uint64_t offset_blocks, num_blocks;
    5550             : 
    5551           5 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5552           0 :                 return -EINVAL;
    5553             :         }
    5554             : 
    5555           5 :         return spdk_bdev_readv_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    5556           5 : }
    5557             : 
    5558             : static int
    5559         226 : bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5560             :                           struct iovec *iov, int iovcnt, void *md_buf, uint64_t offset_blocks,
    5561             :                           uint64_t num_blocks, struct spdk_memory_domain *domain, void *domain_ctx,
    5562             :                           struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    5563             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5564             : {
    5565         226 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5566             :         struct spdk_bdev_io *bdev_io;
    5567         226 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5568             : 
    5569         226 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    5570           0 :                 return -EINVAL;
    5571             :         }
    5572             : 
    5573         226 :         bdev_io = bdev_channel_get_io(channel);
    5574         226 :         if (spdk_unlikely(!bdev_io)) {
    5575           2 :                 return -ENOMEM;
    5576             :         }
    5577             : 
    5578         224 :         bdev_io->internal.ch = channel;
    5579         224 :         bdev_io->internal.desc = desc;
    5580         224 :         bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
    5581         224 :         bdev_io->u.bdev.iovs = iov;
    5582         224 :         bdev_io->u.bdev.iovcnt = iovcnt;
    5583         224 :         bdev_io->u.bdev.md_buf = md_buf;
    5584         224 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5585         224 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5586         224 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5587             : 
    5588         224 :         if (seq != NULL) {
    5589           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    5590           0 :                 bdev_io->internal.accel_sequence = seq;
    5591           0 :         }
    5592             : 
    5593         224 :         if (domain != NULL) {
    5594           2 :                 bdev_io->internal.f.has_memory_domain = true;
    5595           2 :                 bdev_io->internal.memory_domain = domain;
    5596           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    5597           2 :         }
    5598             : 
    5599         224 :         bdev_io->u.bdev.memory_domain = domain;
    5600         224 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    5601         224 :         bdev_io->u.bdev.accel_sequence = seq;
    5602         224 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    5603             : 
    5604         224 :         _bdev_io_submit_ext(desc, bdev_io);
    5605             : 
    5606         224 :         return 0;
    5607         226 : }
    5608             : 
    5609             : int
    5610          21 : spdk_bdev_readv_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5611             :                        struct iovec *iov, int iovcnt,
    5612             :                        uint64_t offset_blocks, uint64_t num_blocks,
    5613             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    5614             : {
    5615          21 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5616             : 
    5617          42 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    5618          21 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5619             : }
    5620             : 
    5621             : int
    5622           4 : spdk_bdev_readv_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5623             :                                struct iovec *iov, int iovcnt, void *md_buf,
    5624             :                                uint64_t offset_blocks, uint64_t num_blocks,
    5625             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5626             : {
    5627           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5628             : 
    5629           4 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    5630           0 :                 return -EINVAL;
    5631             :         }
    5632             : 
    5633           4 :         if (md_buf && !_is_buf_allocated(iov)) {
    5634           0 :                 return -EINVAL;
    5635             :         }
    5636             : 
    5637           8 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    5638           4 :                                          num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, cb, cb_arg);
    5639           4 : }
    5640             : 
    5641             : static inline bool
    5642          14 : _bdev_io_check_opts(struct spdk_bdev_ext_io_opts *opts, struct iovec *iov)
    5643             : {
    5644             :         /*
    5645             :          * We check if opts size is at least of size when we first introduced
    5646             :          * spdk_bdev_ext_io_opts (ac6f2bdd8d) since access to those members
    5647             :          * are not checked internal.
    5648             :          */
    5649          24 :         return opts->size >= offsetof(struct spdk_bdev_ext_io_opts, metadata) +
    5650          14 :                sizeof(opts->metadata) &&
    5651          10 :                opts->size <= sizeof(*opts) &&
    5652             :                /* When memory domain is used, the user must provide data buffers */
    5653           8 :                (!opts->memory_domain || (iov && iov[0].iov_base));
    5654             : }
    5655             : 
    5656             : int
    5657           8 : spdk_bdev_readv_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5658             :                            struct iovec *iov, int iovcnt,
    5659             :                            uint64_t offset_blocks, uint64_t num_blocks,
    5660             :                            spdk_bdev_io_completion_cb cb, void *cb_arg,
    5661             :                            struct spdk_bdev_ext_io_opts *opts)
    5662             : {
    5663           8 :         struct spdk_memory_domain *domain = NULL;
    5664           8 :         struct spdk_accel_sequence *seq = NULL;
    5665           8 :         void *domain_ctx = NULL, *md = NULL;
    5666           8 :         uint32_t dif_check_flags = 0;
    5667           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5668             : 
    5669           8 :         if (opts) {
    5670           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    5671           3 :                         return -EINVAL;
    5672             :                 }
    5673             : 
    5674           4 :                 md = opts->metadata;
    5675           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    5676           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    5677           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    5678           4 :                 if (md) {
    5679           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    5680           0 :                                 return -EINVAL;
    5681             :                         }
    5682             : 
    5683           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    5684           0 :                                 return -EINVAL;
    5685             :                         }
    5686             : 
    5687           4 :                         if (spdk_unlikely(seq != NULL)) {
    5688           0 :                                 return -EINVAL;
    5689             :                         }
    5690           4 :                 }
    5691           4 :         }
    5692             : 
    5693          10 :         dif_check_flags = bdev->dif_check_flags &
    5694           5 :                           ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    5695             : 
    5696          10 :         return bdev_readv_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks,
    5697           5 :                                          num_blocks, domain, domain_ctx, seq, dif_check_flags, cb, cb_arg);
    5698           8 : }
    5699             : 
    5700             : static int
    5701          36 : bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5702             :                           void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5703             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    5704             : {
    5705          36 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5706             :         struct spdk_bdev_io *bdev_io;
    5707          36 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5708             : 
    5709          36 :         if (!desc->write) {
    5710           0 :                 return -EBADF;
    5711             :         }
    5712             : 
    5713          36 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    5714           0 :                 return -EINVAL;
    5715             :         }
    5716             : 
    5717          36 :         bdev_io = bdev_channel_get_io(channel);
    5718          36 :         if (!bdev_io) {
    5719           0 :                 return -ENOMEM;
    5720             :         }
    5721             : 
    5722          36 :         bdev_io->internal.ch = channel;
    5723          36 :         bdev_io->internal.desc = desc;
    5724          36 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    5725          36 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    5726          36 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    5727          36 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev->blocklen;
    5728          36 :         bdev_io->u.bdev.iovcnt = 1;
    5729          36 :         bdev_io->u.bdev.md_buf = md_buf;
    5730          36 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5731          36 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5732          36 :         bdev_io->u.bdev.memory_domain = NULL;
    5733          36 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    5734          36 :         bdev_io->u.bdev.accel_sequence = NULL;
    5735          36 :         bdev_io->u.bdev.dif_check_flags = bdev->dif_check_flags;
    5736          36 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5737             : 
    5738          36 :         bdev_io_submit(bdev_io);
    5739          36 :         return 0;
    5740          36 : }
    5741             : 
    5742             : int
    5743           3 : spdk_bdev_write(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5744             :                 void *buf, uint64_t offset, uint64_t nbytes,
    5745             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5746             : {
    5747             :         uint64_t offset_blocks, num_blocks;
    5748             : 
    5749           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    5750           0 :                 return -EINVAL;
    5751             :         }
    5752             : 
    5753           3 :         return spdk_bdev_write_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
    5754           3 : }
    5755             : 
    5756             : int
    5757          27 : spdk_bdev_write_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5758             :                        void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    5759             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    5760             : {
    5761          54 :         return bdev_write_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    5762          27 :                                          cb, cb_arg);
    5763             : }
    5764             : 
    5765             : int
    5766           3 : spdk_bdev_write_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5767             :                                void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    5768             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    5769             : {
    5770           6 :         struct iovec iov = {
    5771           3 :                 .iov_base = buf,
    5772             :         };
    5773             : 
    5774           3 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    5775           0 :                 return -EINVAL;
    5776             :         }
    5777             : 
    5778           3 :         if (md_buf && !_is_buf_allocated(&iov)) {
    5779           0 :                 return -EINVAL;
    5780             :         }
    5781             : 
    5782           6 :         return bdev_write_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    5783           3 :                                          cb, cb_arg);
    5784           3 : }
    5785             : 
    5786             : static int
    5787          70 : bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5788             :                            struct iovec *iov, int iovcnt, void *md_buf,
    5789             :                            uint64_t offset_blocks, uint64_t num_blocks,
    5790             :                            struct spdk_memory_domain *domain, void *domain_ctx,
    5791             :                            struct spdk_accel_sequence *seq, uint32_t dif_check_flags,
    5792             :                            uint32_t nvme_cdw12_raw, uint32_t nvme_cdw13_raw,
    5793             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    5794             : {
    5795          70 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5796             :         struct spdk_bdev_io *bdev_io;
    5797          70 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    5798             : 
    5799          70 :         if (spdk_unlikely(!desc->write)) {
    5800           0 :                 return -EBADF;
    5801             :         }
    5802             : 
    5803          70 :         if (spdk_unlikely(!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks))) {
    5804           0 :                 return -EINVAL;
    5805             :         }
    5806             : 
    5807          70 :         bdev_io = bdev_channel_get_io(channel);
    5808          70 :         if (spdk_unlikely(!bdev_io)) {
    5809           2 :                 return -ENOMEM;
    5810             :         }
    5811             : 
    5812          68 :         bdev_io->internal.ch = channel;
    5813          68 :         bdev_io->internal.desc = desc;
    5814          68 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
    5815          68 :         bdev_io->u.bdev.iovs = iov;
    5816          68 :         bdev_io->u.bdev.iovcnt = iovcnt;
    5817          68 :         bdev_io->u.bdev.md_buf = md_buf;
    5818          68 :         bdev_io->u.bdev.num_blocks = num_blocks;
    5819          68 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    5820          68 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    5821          68 :         if (seq != NULL) {
    5822           0 :                 bdev_io->internal.f.has_accel_sequence = true;
    5823           0 :                 bdev_io->internal.accel_sequence = seq;
    5824           0 :         }
    5825             : 
    5826          68 :         if (domain != NULL) {
    5827           2 :                 bdev_io->internal.f.has_memory_domain = true;
    5828           2 :                 bdev_io->internal.memory_domain = domain;
    5829           2 :                 bdev_io->internal.memory_domain_ctx = domain_ctx;
    5830           2 :         }
    5831             : 
    5832          68 :         bdev_io->u.bdev.memory_domain = domain;
    5833          68 :         bdev_io->u.bdev.memory_domain_ctx = domain_ctx;
    5834          68 :         bdev_io->u.bdev.accel_sequence = seq;
    5835          68 :         bdev_io->u.bdev.dif_check_flags = dif_check_flags;
    5836          68 :         bdev_io->u.bdev.nvme_cdw12.raw = nvme_cdw12_raw;
    5837          68 :         bdev_io->u.bdev.nvme_cdw13.raw = nvme_cdw13_raw;
    5838             : 
    5839          68 :         _bdev_io_submit_ext(desc, bdev_io);
    5840             : 
    5841          68 :         return 0;
    5842          70 : }
    5843             : 
    5844             : int
    5845           3 : spdk_bdev_writev(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5846             :                  struct iovec *iov, int iovcnt,
    5847             :                  uint64_t offset, uint64_t len,
    5848             :                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    5849             : {
    5850             :         uint64_t offset_blocks, num_blocks;
    5851             : 
    5852           3 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    5853           0 :                 return -EINVAL;
    5854             :         }
    5855             : 
    5856           3 :         return spdk_bdev_writev_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
    5857           3 : }
    5858             : 
    5859             : int
    5860          14 : spdk_bdev_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5861             :                         struct iovec *iov, int iovcnt,
    5862             :                         uint64_t offset_blocks, uint64_t num_blocks,
    5863             :                         spdk_bdev_io_completion_cb cb, void *cb_arg)
    5864             : {
    5865          14 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5866             : 
    5867          28 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    5868          14 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    5869          14 :                                           cb, cb_arg);
    5870             : }
    5871             : 
    5872             : int
    5873           1 : spdk_bdev_writev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5874             :                                 struct iovec *iov, int iovcnt, void *md_buf,
    5875             :                                 uint64_t offset_blocks, uint64_t num_blocks,
    5876             :                                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    5877             : {
    5878           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5879             : 
    5880           1 :         if (md_buf && !spdk_bdev_is_md_separate(bdev)) {
    5881           0 :                 return -EINVAL;
    5882             :         }
    5883             : 
    5884           1 :         if (md_buf && !_is_buf_allocated(iov)) {
    5885           0 :                 return -EINVAL;
    5886             :         }
    5887             : 
    5888           2 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    5889           1 :                                           num_blocks, NULL, NULL, NULL, bdev->dif_check_flags, 0, 0,
    5890           1 :                                           cb, cb_arg);
    5891           1 : }
    5892             : 
    5893             : int
    5894           8 : spdk_bdev_writev_blocks_ext(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    5895             :                             struct iovec *iov, int iovcnt,
    5896             :                             uint64_t offset_blocks, uint64_t num_blocks,
    5897             :                             spdk_bdev_io_completion_cb cb, void *cb_arg,
    5898             :                             struct spdk_bdev_ext_io_opts *opts)
    5899             : {
    5900           8 :         struct spdk_memory_domain *domain = NULL;
    5901           8 :         struct spdk_accel_sequence *seq = NULL;
    5902           8 :         void *domain_ctx = NULL, *md = NULL;
    5903           8 :         uint32_t dif_check_flags = 0;
    5904           8 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    5905           8 :         uint32_t nvme_cdw12_raw = 0;
    5906           8 :         uint32_t nvme_cdw13_raw = 0;
    5907             : 
    5908           8 :         if (opts) {
    5909           7 :                 if (spdk_unlikely(!_bdev_io_check_opts(opts, iov))) {
    5910           3 :                         return -EINVAL;
    5911             :                 }
    5912           4 :                 md = opts->metadata;
    5913           4 :                 domain = bdev_get_ext_io_opt(opts, memory_domain, NULL);
    5914           4 :                 domain_ctx = bdev_get_ext_io_opt(opts, memory_domain_ctx, NULL);
    5915           4 :                 seq = bdev_get_ext_io_opt(opts, accel_sequence, NULL);
    5916           4 :                 nvme_cdw12_raw = bdev_get_ext_io_opt(opts, nvme_cdw12.raw, 0);
    5917           4 :                 nvme_cdw13_raw = bdev_get_ext_io_opt(opts, nvme_cdw13.raw, 0);
    5918           4 :                 if (md) {
    5919           4 :                         if (spdk_unlikely(!spdk_bdev_is_md_separate(bdev))) {
    5920           0 :                                 return -EINVAL;
    5921             :                         }
    5922             : 
    5923           4 :                         if (spdk_unlikely(!_is_buf_allocated(iov))) {
    5924           0 :                                 return -EINVAL;
    5925             :                         }
    5926             : 
    5927           4 :                         if (spdk_unlikely(seq != NULL)) {
    5928           0 :                                 return -EINVAL;
    5929             :                         }
    5930           4 :                 }
    5931           4 :         }
    5932             : 
    5933          10 :         dif_check_flags = bdev->dif_check_flags &
    5934           5 :                           ~(bdev_get_ext_io_opt(opts, dif_check_flags_exclude_mask, 0));
    5935             : 
    5936          10 :         return bdev_writev_blocks_with_md(desc, ch, iov, iovcnt, md, offset_blocks, num_blocks,
    5937           5 :                                           domain, domain_ctx, seq, dif_check_flags,
    5938           5 :                                           nvme_cdw12_raw, nvme_cdw13_raw, cb, cb_arg);
    5939           8 : }
    5940             : 
    5941             : static void
    5942          11 : bdev_compare_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    5943             : {
    5944          11 :         struct spdk_bdev_io *parent_io = cb_arg;
    5945          11 :         struct spdk_bdev *bdev = parent_io->bdev;
    5946          11 :         uint8_t *read_buf = bdev_io->u.bdev.iovs[0].iov_base;
    5947          11 :         int i, rc = 0;
    5948             : 
    5949          11 :         if (!success) {
    5950           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    5951           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    5952           0 :                 spdk_bdev_free_io(bdev_io);
    5953           0 :                 return;
    5954             :         }
    5955             : 
    5956          17 :         for (i = 0; i < parent_io->u.bdev.iovcnt; i++) {
    5957          22 :                 rc = memcmp(read_buf,
    5958          11 :                             parent_io->u.bdev.iovs[i].iov_base,
    5959          11 :                             parent_io->u.bdev.iovs[i].iov_len);
    5960          11 :                 if (rc) {
    5961           5 :                         break;
    5962             :                 }
    5963           6 :                 read_buf += parent_io->u.bdev.iovs[i].iov_len;
    5964           6 :         }
    5965             : 
    5966          11 :         if (rc == 0 && parent_io->u.bdev.md_buf && spdk_bdev_is_md_separate(bdev)) {
    5967           4 :                 rc = memcmp(bdev_io->u.bdev.md_buf,
    5968           2 :                             parent_io->u.bdev.md_buf,
    5969           2 :                             spdk_bdev_get_md_size(bdev));
    5970           2 :         }
    5971             : 
    5972          11 :         spdk_bdev_free_io(bdev_io);
    5973             : 
    5974          11 :         if (rc == 0) {
    5975           5 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    5976           5 :                 parent_io->internal.cb(parent_io, true, parent_io->internal.caller_ctx);
    5977           5 :         } else {
    5978           6 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_MISCOMPARE;
    5979           6 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
    5980             :         }
    5981          11 : }
    5982             : 
    5983             : static void
    5984          11 : bdev_compare_do_read(void *_bdev_io)
    5985             : {
    5986          11 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    5987             :         int rc;
    5988             : 
    5989          22 :         rc = spdk_bdev_read_blocks(bdev_io->internal.desc,
    5990          11 :                                    spdk_io_channel_from_ctx(bdev_io->internal.ch), NULL,
    5991          11 :                                    bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    5992          11 :                                    bdev_compare_do_read_done, bdev_io);
    5993             : 
    5994          11 :         if (rc == -ENOMEM) {
    5995           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_do_read);
    5996          11 :         } else if (rc != 0) {
    5997           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    5998           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    5999           0 :         }
    6000          11 : }
    6001             : 
    6002             : static int
    6003          16 : bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6004             :                              struct iovec *iov, int iovcnt, void *md_buf,
    6005             :                              uint64_t offset_blocks, uint64_t num_blocks,
    6006             :                              spdk_bdev_io_completion_cb cb, void *cb_arg)
    6007             : {
    6008          16 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6009             :         struct spdk_bdev_io *bdev_io;
    6010          16 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6011             : 
    6012          16 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6013           0 :                 return -EINVAL;
    6014             :         }
    6015             : 
    6016          16 :         bdev_io = bdev_channel_get_io(channel);
    6017          16 :         if (!bdev_io) {
    6018           0 :                 return -ENOMEM;
    6019             :         }
    6020             : 
    6021          16 :         bdev_io->internal.ch = channel;
    6022          16 :         bdev_io->internal.desc = desc;
    6023          16 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6024          16 :         bdev_io->u.bdev.iovs = iov;
    6025          16 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6026          16 :         bdev_io->u.bdev.md_buf = md_buf;
    6027          16 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6028          16 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6029          16 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6030          16 :         bdev_io->u.bdev.memory_domain = NULL;
    6031          16 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6032          16 :         bdev_io->u.bdev.accel_sequence = NULL;
    6033             : 
    6034          16 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6035           7 :                 bdev_io_submit(bdev_io);
    6036           7 :                 return 0;
    6037             :         }
    6038             : 
    6039           9 :         bdev_compare_do_read(bdev_io);
    6040             : 
    6041           9 :         return 0;
    6042          16 : }
    6043             : 
    6044             : int
    6045          10 : spdk_bdev_comparev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6046             :                           struct iovec *iov, int iovcnt,
    6047             :                           uint64_t offset_blocks, uint64_t num_blocks,
    6048             :                           spdk_bdev_io_completion_cb cb, void *cb_arg)
    6049             : {
    6050          20 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, NULL, offset_blocks,
    6051          10 :                                             num_blocks, cb, cb_arg);
    6052             : }
    6053             : 
    6054             : int
    6055           6 : spdk_bdev_comparev_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6056             :                                   struct iovec *iov, int iovcnt, void *md_buf,
    6057             :                                   uint64_t offset_blocks, uint64_t num_blocks,
    6058             :                                   spdk_bdev_io_completion_cb cb, void *cb_arg)
    6059             : {
    6060           6 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6061           0 :                 return -EINVAL;
    6062             :         }
    6063             : 
    6064           6 :         if (md_buf && !_is_buf_allocated(iov)) {
    6065           0 :                 return -EINVAL;
    6066             :         }
    6067             : 
    6068          12 :         return bdev_comparev_blocks_with_md(desc, ch, iov, iovcnt, md_buf, offset_blocks,
    6069           6 :                                             num_blocks, cb, cb_arg);
    6070           6 : }
    6071             : 
    6072             : static int
    6073           4 : bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6074             :                             void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6075             :                             spdk_bdev_io_completion_cb cb, void *cb_arg)
    6076             : {
    6077           4 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6078             :         struct spdk_bdev_io *bdev_io;
    6079           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6080             : 
    6081           4 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6082           0 :                 return -EINVAL;
    6083             :         }
    6084             : 
    6085           4 :         bdev_io = bdev_channel_get_io(channel);
    6086           4 :         if (!bdev_io) {
    6087           0 :                 return -ENOMEM;
    6088             :         }
    6089             : 
    6090           4 :         bdev_io->internal.ch = channel;
    6091           4 :         bdev_io->internal.desc = desc;
    6092           4 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE;
    6093           4 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6094           4 :         bdev_io->u.bdev.iovs[0].iov_base = buf;
    6095           4 :         bdev_io->u.bdev.iovs[0].iov_len = num_blocks * bdev->blocklen;
    6096           4 :         bdev_io->u.bdev.iovcnt = 1;
    6097           4 :         bdev_io->u.bdev.md_buf = md_buf;
    6098           4 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6099           4 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6100           4 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6101           4 :         bdev_io->u.bdev.memory_domain = NULL;
    6102           4 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6103           4 :         bdev_io->u.bdev.accel_sequence = NULL;
    6104             : 
    6105           4 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)) {
    6106           2 :                 bdev_io_submit(bdev_io);
    6107           2 :                 return 0;
    6108             :         }
    6109             : 
    6110           2 :         bdev_compare_do_read(bdev_io);
    6111             : 
    6112           2 :         return 0;
    6113           4 : }
    6114             : 
    6115             : int
    6116           4 : spdk_bdev_compare_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6117             :                          void *buf, uint64_t offset_blocks, uint64_t num_blocks,
    6118             :                          spdk_bdev_io_completion_cb cb, void *cb_arg)
    6119             : {
    6120           8 :         return bdev_compare_blocks_with_md(desc, ch, buf, NULL, offset_blocks, num_blocks,
    6121           4 :                                            cb, cb_arg);
    6122             : }
    6123             : 
    6124             : int
    6125           0 : spdk_bdev_compare_blocks_with_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6126             :                                  void *buf, void *md_buf, uint64_t offset_blocks, uint64_t num_blocks,
    6127             :                                  spdk_bdev_io_completion_cb cb, void *cb_arg)
    6128             : {
    6129           0 :         struct iovec iov = {
    6130           0 :                 .iov_base = buf,
    6131             :         };
    6132             : 
    6133           0 :         if (md_buf && !spdk_bdev_is_md_separate(spdk_bdev_desc_get_bdev(desc))) {
    6134           0 :                 return -EINVAL;
    6135             :         }
    6136             : 
    6137           0 :         if (md_buf && !_is_buf_allocated(&iov)) {
    6138           0 :                 return -EINVAL;
    6139             :         }
    6140             : 
    6141           0 :         return bdev_compare_blocks_with_md(desc, ch, buf, md_buf, offset_blocks, num_blocks,
    6142           0 :                                            cb, cb_arg);
    6143           0 : }
    6144             : 
    6145             : static void
    6146           2 : bdev_comparev_and_writev_blocks_unlocked(struct lba_range *range, void *ctx, int unlock_status)
    6147             : {
    6148           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6149             : 
    6150           2 :         if (unlock_status) {
    6151           0 :                 SPDK_ERRLOG("LBA range unlock failed\n");
    6152           0 :         }
    6153             : 
    6154           4 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS ? true :
    6155           2 :                              false, bdev_io->internal.caller_ctx);
    6156           2 : }
    6157             : 
    6158             : static void
    6159           2 : bdev_comparev_and_writev_blocks_unlock(struct spdk_bdev_io *bdev_io, int status)
    6160             : {
    6161           2 :         bdev_io->internal.status = status;
    6162             : 
    6163           4 :         bdev_unlock_lba_range(bdev_io->internal.desc, spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6164           2 :                               bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6165           2 :                               bdev_comparev_and_writev_blocks_unlocked, bdev_io);
    6166           2 : }
    6167             : 
    6168             : static void
    6169           1 : bdev_compare_and_write_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6170             : {
    6171           1 :         struct spdk_bdev_io *parent_io = cb_arg;
    6172             : 
    6173           1 :         if (!success) {
    6174           0 :                 SPDK_ERRLOG("Compare and write operation failed\n");
    6175           0 :         }
    6176             : 
    6177           1 :         spdk_bdev_free_io(bdev_io);
    6178             : 
    6179           2 :         bdev_comparev_and_writev_blocks_unlock(parent_io,
    6180           1 :                                                success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED);
    6181           1 : }
    6182             : 
    6183             : static void
    6184           1 : bdev_compare_and_write_do_write(void *_bdev_io)
    6185             : {
    6186           1 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6187             :         int rc;
    6188             : 
    6189           2 :         rc = spdk_bdev_writev_blocks(bdev_io->internal.desc,
    6190           1 :                                      spdk_io_channel_from_ctx(bdev_io->internal.ch),
    6191           1 :                                      bdev_io->u.bdev.fused_iovs, bdev_io->u.bdev.fused_iovcnt,
    6192           1 :                                      bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6193           1 :                                      bdev_compare_and_write_do_write_done, bdev_io);
    6194             : 
    6195             : 
    6196           1 :         if (rc == -ENOMEM) {
    6197           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_write);
    6198           1 :         } else if (rc != 0) {
    6199           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6200           0 :         }
    6201           1 : }
    6202             : 
    6203             : static void
    6204           2 : bdev_compare_and_write_do_compare_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    6205             : {
    6206           2 :         struct spdk_bdev_io *parent_io = cb_arg;
    6207             : 
    6208           2 :         spdk_bdev_free_io(bdev_io);
    6209             : 
    6210           2 :         if (!success) {
    6211           1 :                 bdev_comparev_and_writev_blocks_unlock(parent_io, SPDK_BDEV_IO_STATUS_MISCOMPARE);
    6212           1 :                 return;
    6213             :         }
    6214             : 
    6215           1 :         bdev_compare_and_write_do_write(parent_io);
    6216           2 : }
    6217             : 
    6218             : static void
    6219           2 : bdev_compare_and_write_do_compare(void *_bdev_io)
    6220             : {
    6221           2 :         struct spdk_bdev_io *bdev_io = _bdev_io;
    6222             :         int rc;
    6223             : 
    6224           4 :         rc = spdk_bdev_comparev_blocks(bdev_io->internal.desc,
    6225           2 :                                        spdk_io_channel_from_ctx(bdev_io->internal.ch), bdev_io->u.bdev.iovs,
    6226           2 :                                        bdev_io->u.bdev.iovcnt, bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
    6227           2 :                                        bdev_compare_and_write_do_compare_done, bdev_io);
    6228             : 
    6229           2 :         if (rc == -ENOMEM) {
    6230           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_compare_and_write_do_compare);
    6231           2 :         } else if (rc != 0) {
    6232           0 :                 bdev_comparev_and_writev_blocks_unlock(bdev_io, SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED);
    6233           0 :         }
    6234           2 : }
    6235             : 
    6236             : static void
    6237           2 : bdev_comparev_and_writev_blocks_locked(struct lba_range *range, void *ctx, int status)
    6238             : {
    6239           2 :         struct spdk_bdev_io *bdev_io = ctx;
    6240             : 
    6241           2 :         if (status) {
    6242           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED;
    6243           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
    6244           0 :                 return;
    6245             :         }
    6246             : 
    6247           2 :         bdev_compare_and_write_do_compare(bdev_io);
    6248           2 : }
    6249             : 
    6250             : int
    6251           2 : spdk_bdev_comparev_and_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6252             :                                      struct iovec *compare_iov, int compare_iovcnt,
    6253             :                                      struct iovec *write_iov, int write_iovcnt,
    6254             :                                      uint64_t offset_blocks, uint64_t num_blocks,
    6255             :                                      spdk_bdev_io_completion_cb cb, void *cb_arg)
    6256             : {
    6257           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6258             :         struct spdk_bdev_io *bdev_io;
    6259           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6260             : 
    6261           2 :         if (!desc->write) {
    6262           0 :                 return -EBADF;
    6263             :         }
    6264             : 
    6265           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6266           0 :                 return -EINVAL;
    6267             :         }
    6268             : 
    6269           2 :         if (num_blocks > bdev->acwu) {
    6270           0 :                 return -EINVAL;
    6271             :         }
    6272             : 
    6273           2 :         bdev_io = bdev_channel_get_io(channel);
    6274           2 :         if (!bdev_io) {
    6275           0 :                 return -ENOMEM;
    6276             :         }
    6277             : 
    6278           2 :         bdev_io->internal.ch = channel;
    6279           2 :         bdev_io->internal.desc = desc;
    6280           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE;
    6281           2 :         bdev_io->u.bdev.iovs = compare_iov;
    6282           2 :         bdev_io->u.bdev.iovcnt = compare_iovcnt;
    6283           2 :         bdev_io->u.bdev.fused_iovs = write_iov;
    6284           2 :         bdev_io->u.bdev.fused_iovcnt = write_iovcnt;
    6285           2 :         bdev_io->u.bdev.md_buf = NULL;
    6286           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6287           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6288           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6289           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6290           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6291           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6292             : 
    6293           2 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE)) {
    6294           0 :                 bdev_io_submit(bdev_io);
    6295           0 :                 return 0;
    6296             :         }
    6297             : 
    6298           4 :         return bdev_lock_lba_range(desc, ch, offset_blocks, num_blocks,
    6299           2 :                                    bdev_comparev_and_writev_blocks_locked, bdev_io);
    6300           2 : }
    6301             : 
    6302             : int
    6303           2 : spdk_bdev_zcopy_start(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6304             :                       struct iovec *iov, int iovcnt,
    6305             :                       uint64_t offset_blocks, uint64_t num_blocks,
    6306             :                       bool populate,
    6307             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
    6308             : {
    6309           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6310             :         struct spdk_bdev_io *bdev_io;
    6311           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6312             : 
    6313           2 :         if (!desc->write) {
    6314           0 :                 return -EBADF;
    6315             :         }
    6316             : 
    6317           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6318           0 :                 return -EINVAL;
    6319             :         }
    6320             : 
    6321           2 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ZCOPY)) {
    6322           0 :                 return -ENOTSUP;
    6323             :         }
    6324             : 
    6325           2 :         bdev_io = bdev_channel_get_io(channel);
    6326           2 :         if (!bdev_io) {
    6327           0 :                 return -ENOMEM;
    6328             :         }
    6329             : 
    6330           2 :         bdev_io->internal.ch = channel;
    6331           2 :         bdev_io->internal.desc = desc;
    6332           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ZCOPY;
    6333           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6334           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6335           2 :         bdev_io->u.bdev.iovs = iov;
    6336           2 :         bdev_io->u.bdev.iovcnt = iovcnt;
    6337           2 :         bdev_io->u.bdev.md_buf = NULL;
    6338           2 :         bdev_io->u.bdev.zcopy.populate = populate ? 1 : 0;
    6339           2 :         bdev_io->u.bdev.zcopy.commit = 0;
    6340           2 :         bdev_io->u.bdev.zcopy.start = 1;
    6341           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6342           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6343           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6344           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6345             : 
    6346           2 :         bdev_io_submit(bdev_io);
    6347             : 
    6348           2 :         return 0;
    6349           2 : }
    6350             : 
    6351             : int
    6352           2 : spdk_bdev_zcopy_end(struct spdk_bdev_io *bdev_io, bool commit,
    6353             :                     spdk_bdev_io_completion_cb cb, void *cb_arg)
    6354             : {
    6355           2 :         if (bdev_io->type != SPDK_BDEV_IO_TYPE_ZCOPY) {
    6356           0 :                 return -EINVAL;
    6357             :         }
    6358             : 
    6359           2 :         bdev_io->u.bdev.zcopy.commit = commit ? 1 : 0;
    6360           2 :         bdev_io->u.bdev.zcopy.start = 0;
    6361           2 :         bdev_io->internal.caller_ctx = cb_arg;
    6362           2 :         bdev_io->internal.cb = cb;
    6363           2 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_PENDING;
    6364             : 
    6365           2 :         bdev_io_submit(bdev_io);
    6366             : 
    6367           2 :         return 0;
    6368           2 : }
    6369             : 
    6370             : int
    6371           0 : spdk_bdev_write_zeroes(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6372             :                        uint64_t offset, uint64_t len,
    6373             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6374             : {
    6375             :         uint64_t offset_blocks, num_blocks;
    6376             : 
    6377           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, len, &num_blocks) != 0) {
    6378           0 :                 return -EINVAL;
    6379             :         }
    6380             : 
    6381           0 :         return spdk_bdev_write_zeroes_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6382           0 : }
    6383             : 
    6384             : int
    6385          33 : spdk_bdev_write_zeroes_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6386             :                               uint64_t offset_blocks, uint64_t num_blocks,
    6387             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6388             : {
    6389          33 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6390             :         struct spdk_bdev_io *bdev_io;
    6391          33 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6392             : 
    6393          33 :         if (!desc->write) {
    6394           0 :                 return -EBADF;
    6395             :         }
    6396             : 
    6397          33 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6398           0 :                 return -EINVAL;
    6399             :         }
    6400             : 
    6401          33 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) &&
    6402          10 :             !bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE)) {
    6403           1 :                 return -ENOTSUP;
    6404             :         }
    6405             : 
    6406          32 :         bdev_io = bdev_channel_get_io(channel);
    6407             : 
    6408          32 :         if (!bdev_io) {
    6409           0 :                 return -ENOMEM;
    6410             :         }
    6411             : 
    6412          32 :         bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE_ZEROES;
    6413          32 :         bdev_io->internal.ch = channel;
    6414          32 :         bdev_io->internal.desc = desc;
    6415          32 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6416          32 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6417          32 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6418          32 :         bdev_io->u.bdev.memory_domain = NULL;
    6419          32 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6420          32 :         bdev_io->u.bdev.accel_sequence = NULL;
    6421             : 
    6422             :         /* If the write_zeroes size is large and should be split, use the generic split
    6423             :          * logic regardless of whether SPDK_BDEV_IO_TYPE_WRITE_ZEREOS is supported or not.
    6424             :          *
    6425             :          * Then, send the write_zeroes request if SPDK_BDEV_IO_TYPE_WRITE_ZEROES is supported
    6426             :          * or emulate it using regular write request otherwise.
    6427             :          */
    6428          32 :         if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) ||
    6429           9 :             bdev_io->internal.f.split) {
    6430          26 :                 bdev_io_submit(bdev_io);
    6431          26 :                 return 0;
    6432             :         }
    6433             : 
    6434           6 :         assert(_bdev_get_block_size_with_md(bdev) <= ZERO_BUFFER_SIZE);
    6435             : 
    6436           6 :         return bdev_write_zero_buffer(bdev_io);
    6437          33 : }
    6438             : 
    6439             : int
    6440           0 : spdk_bdev_unmap(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6441             :                 uint64_t offset, uint64_t nbytes,
    6442             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6443             : {
    6444             :         uint64_t offset_blocks, num_blocks;
    6445             : 
    6446           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
    6447           0 :                 return -EINVAL;
    6448             :         }
    6449             : 
    6450           0 :         return spdk_bdev_unmap_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6451           0 : }
    6452             : 
    6453             : static void
    6454           0 : bdev_io_complete_cb(void *ctx)
    6455             : {
    6456           0 :         struct spdk_bdev_io *bdev_io = ctx;
    6457             : 
    6458           0 :         bdev_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    6459           0 :         bdev_io->internal.cb(bdev_io, true, bdev_io->internal.caller_ctx);
    6460           0 : }
    6461             : 
    6462             : int
    6463          22 : spdk_bdev_unmap_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6464             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6465             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6466             : {
    6467          22 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6468             :         struct spdk_bdev_io *bdev_io;
    6469          22 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6470             : 
    6471          22 :         if (!desc->write) {
    6472           0 :                 return -EBADF;
    6473             :         }
    6474             : 
    6475          22 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6476           0 :                 return -EINVAL;
    6477             :         }
    6478             : 
    6479          22 :         bdev_io = bdev_channel_get_io(channel);
    6480          22 :         if (!bdev_io) {
    6481           0 :                 return -ENOMEM;
    6482             :         }
    6483             : 
    6484          22 :         bdev_io->internal.ch = channel;
    6485          22 :         bdev_io->internal.desc = desc;
    6486          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_UNMAP;
    6487             : 
    6488          22 :         bdev_io->u.bdev.iovs = &bdev_io->iov;
    6489          22 :         bdev_io->u.bdev.iovs[0].iov_base = NULL;
    6490          22 :         bdev_io->u.bdev.iovs[0].iov_len = 0;
    6491          22 :         bdev_io->u.bdev.iovcnt = 1;
    6492             : 
    6493          22 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6494          22 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6495          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6496          22 :         bdev_io->u.bdev.memory_domain = NULL;
    6497          22 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6498          22 :         bdev_io->u.bdev.accel_sequence = NULL;
    6499             : 
    6500          22 :         if (num_blocks == 0) {
    6501           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
    6502           0 :                 return 0;
    6503             :         }
    6504             : 
    6505          22 :         bdev_io_submit(bdev_io);
    6506          22 :         return 0;
    6507          22 : }
    6508             : 
    6509             : int
    6510           0 : spdk_bdev_flush(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6511             :                 uint64_t offset, uint64_t length,
    6512             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6513             : {
    6514             :         uint64_t offset_blocks, num_blocks;
    6515             : 
    6516           0 :         if (bdev_bytes_to_blocks(desc, offset, &offset_blocks, length, &num_blocks) != 0) {
    6517           0 :                 return -EINVAL;
    6518             :         }
    6519             : 
    6520           0 :         return spdk_bdev_flush_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
    6521           0 : }
    6522             : 
    6523             : int
    6524           2 : spdk_bdev_flush_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6525             :                        uint64_t offset_blocks, uint64_t num_blocks,
    6526             :                        spdk_bdev_io_completion_cb cb, void *cb_arg)
    6527             : {
    6528           2 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6529             :         struct spdk_bdev_io *bdev_io;
    6530           2 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6531             : 
    6532           2 :         if (!desc->write) {
    6533           0 :                 return -EBADF;
    6534             :         }
    6535             : 
    6536           2 :         if (!bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
    6537           0 :                 return -EINVAL;
    6538             :         }
    6539             : 
    6540           2 :         bdev_io = bdev_channel_get_io(channel);
    6541           2 :         if (!bdev_io) {
    6542           0 :                 return -ENOMEM;
    6543             :         }
    6544             : 
    6545           2 :         bdev_io->internal.ch = channel;
    6546           2 :         bdev_io->internal.desc = desc;
    6547           2 :         bdev_io->type = SPDK_BDEV_IO_TYPE_FLUSH;
    6548           2 :         bdev_io->u.bdev.iovs = NULL;
    6549           2 :         bdev_io->u.bdev.iovcnt = 0;
    6550           2 :         bdev_io->u.bdev.offset_blocks = offset_blocks;
    6551           2 :         bdev_io->u.bdev.num_blocks = num_blocks;
    6552           2 :         bdev_io->u.bdev.memory_domain = NULL;
    6553           2 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
    6554           2 :         bdev_io->u.bdev.accel_sequence = NULL;
    6555           2 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6556             : 
    6557           2 :         bdev_io_submit(bdev_io);
    6558           2 :         return 0;
    6559           2 : }
    6560             : 
    6561             : static int bdev_reset_poll_for_outstanding_io(void *ctx);
    6562             : 
    6563             : static void
    6564          13 : bdev_reset_check_outstanding_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6565             : {
    6566          13 :         struct spdk_bdev_channel *ch = _ctx;
    6567             :         struct spdk_bdev_io *bdev_io;
    6568             : 
    6569          13 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6570             : 
    6571          13 :         if (status == -EBUSY) {
    6572           9 :                 if (spdk_get_ticks() < bdev_io->u.reset.wait_poller.stop_time_tsc) {
    6573           8 :                         bdev_io->u.reset.wait_poller.poller = SPDK_POLLER_REGISTER(bdev_reset_poll_for_outstanding_io,
    6574             :                                                               ch, BDEV_RESET_CHECK_OUTSTANDING_IO_PERIOD);
    6575           8 :                 } else {
    6576           1 :                         TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6577             : 
    6578           1 :                         if (TAILQ_EMPTY(&ch->io_memory_domain) && TAILQ_EMPTY(&ch->io_accel_exec)) {
    6579             :                                 /* If outstanding IOs are still present and reset_io_drain_timeout
    6580             :                                  * seconds passed, start the reset. */
    6581           1 :                                 bdev_io_submit_reset(bdev_io);
    6582           1 :                         } else {
    6583             :                                 /* We still have in progress memory domain pull/push or we're
    6584             :                                  * executing accel sequence.  Since we cannot abort either of those
    6585             :                                  * operations, fail the reset request. */
    6586           0 :                                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
    6587             :                         }
    6588             :                 }
    6589           9 :         } else {
    6590           4 :                 TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6591           4 :                 SPDK_DEBUGLOG(bdev,
    6592             :                               "Skipping reset for underlying device of bdev: %s - no outstanding I/O.\n",
    6593             :                               ch->bdev->name);
    6594             :                 /* Mark the completion status as a SUCCESS and complete the reset. */
    6595           4 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
    6596             :         }
    6597          13 : }
    6598             : 
    6599             : static void
    6600          13 : bdev_reset_check_outstanding_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6601             :                                 struct spdk_io_channel *io_ch, void *_ctx)
    6602             : {
    6603          13 :         struct spdk_bdev_channel *cur_ch = __io_ch_to_bdev_ch(io_ch);
    6604          13 :         int status = 0;
    6605             : 
    6606          17 :         if (cur_ch->io_outstanding > 0 ||
    6607           4 :             !TAILQ_EMPTY(&cur_ch->io_memory_domain) ||
    6608           4 :             !TAILQ_EMPTY(&cur_ch->io_accel_exec)) {
    6609             :                 /* If a channel has outstanding IO, set status to -EBUSY code. This will stop
    6610             :                  * further iteration over the rest of the channels and pass non-zero status
    6611             :                  * to the callback function. */
    6612           9 :                 status = -EBUSY;
    6613           9 :         }
    6614          13 :         spdk_bdev_for_each_channel_continue(i, status);
    6615          13 : }
    6616             : 
    6617             : static int
    6618           8 : bdev_reset_poll_for_outstanding_io(void *ctx)
    6619             : {
    6620           8 :         struct spdk_bdev_channel *ch = ctx;
    6621             :         struct spdk_bdev_io *bdev_io;
    6622             : 
    6623           8 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6624             : 
    6625           8 :         spdk_poller_unregister(&bdev_io->u.reset.wait_poller.poller);
    6626           8 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_check_outstanding_io, ch,
    6627             :                                    bdev_reset_check_outstanding_io_done);
    6628             : 
    6629           8 :         return SPDK_POLLER_BUSY;
    6630             : }
    6631             : 
    6632             : static void
    6633          15 : bdev_reset_freeze_channel_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6634             : {
    6635          15 :         struct spdk_bdev_channel *ch = _ctx;
    6636             :         struct spdk_bdev_io *bdev_io;
    6637             : 
    6638          15 :         bdev_io = TAILQ_FIRST(&ch->queued_resets);
    6639             : 
    6640          15 :         if (bdev->reset_io_drain_timeout == 0) {
    6641          10 :                 TAILQ_REMOVE(&ch->queued_resets, bdev_io, internal.link);
    6642             : 
    6643          10 :                 bdev_io_submit_reset(bdev_io);
    6644          10 :                 return;
    6645             :         }
    6646             : 
    6647          10 :         bdev_io->u.reset.wait_poller.stop_time_tsc = spdk_get_ticks() +
    6648           5 :                         (ch->bdev->reset_io_drain_timeout * spdk_get_ticks_hz());
    6649             : 
    6650             :         /* In case bdev->reset_io_drain_timeout is not equal to zero,
    6651             :          * submit the reset to the underlying module only if outstanding I/O
    6652             :          * remain after reset_io_drain_timeout seconds have passed. */
    6653           5 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_check_outstanding_io, ch,
    6654             :                                    bdev_reset_check_outstanding_io_done);
    6655          15 : }
    6656             : 
    6657             : static void
    6658          18 : bdev_reset_freeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6659             :                           struct spdk_io_channel *ch, void *_ctx)
    6660             : {
    6661             :         struct spdk_bdev_channel        *channel;
    6662             :         struct spdk_bdev_mgmt_channel   *mgmt_channel;
    6663             :         struct spdk_bdev_shared_resource *shared_resource;
    6664             :         bdev_io_tailq_t                 tmp_queued;
    6665             : 
    6666          18 :         TAILQ_INIT(&tmp_queued);
    6667             : 
    6668          18 :         channel = __io_ch_to_bdev_ch(ch);
    6669          18 :         shared_resource = channel->shared_resource;
    6670          18 :         mgmt_channel = shared_resource->mgmt_ch;
    6671             : 
    6672          18 :         channel->flags |= BDEV_CH_RESET_IN_PROGRESS;
    6673             : 
    6674          18 :         if ((channel->flags & BDEV_CH_QOS_ENABLED) != 0) {
    6675           2 :                 TAILQ_SWAP(&channel->qos_queued_io, &tmp_queued, spdk_bdev_io, internal.link);
    6676           2 :         }
    6677             : 
    6678          18 :         bdev_abort_all_queued_io(&shared_resource->nomem_io, channel);
    6679          18 :         bdev_abort_all_buf_io(mgmt_channel, channel);
    6680          18 :         bdev_abort_all_queued_io(&tmp_queued, channel);
    6681             : 
    6682          18 :         spdk_bdev_for_each_channel_continue(i, 0);
    6683          18 : }
    6684             : 
    6685             : static void
    6686          15 : bdev_start_reset(void *ctx)
    6687             : {
    6688          15 :         struct spdk_bdev_channel *ch = ctx;
    6689             : 
    6690          15 :         spdk_bdev_for_each_channel(ch->bdev, bdev_reset_freeze_channel, ch,
    6691             :                                    bdev_reset_freeze_channel_done);
    6692          15 : }
    6693             : 
    6694             : static void
    6695          16 : bdev_channel_start_reset(struct spdk_bdev_channel *ch)
    6696             : {
    6697          16 :         struct spdk_bdev *bdev = ch->bdev;
    6698             : 
    6699          16 :         assert(!TAILQ_EMPTY(&ch->queued_resets));
    6700             : 
    6701          16 :         spdk_spin_lock(&bdev->internal.spinlock);
    6702          16 :         if (bdev->internal.reset_in_progress == NULL) {
    6703          15 :                 bdev->internal.reset_in_progress = TAILQ_FIRST(&ch->queued_resets);
    6704             :                 /*
    6705             :                  * Take a channel reference for the target bdev for the life of this
    6706             :                  *  reset.  This guards against the channel getting destroyed while
    6707             :                  *  spdk_bdev_for_each_channel() calls related to this reset IO are in
    6708             :                  *  progress.  We will release the reference when this reset is
    6709             :                  *  completed.
    6710             :                  */
    6711          15 :                 bdev->internal.reset_in_progress->u.reset.ch_ref = spdk_get_io_channel(__bdev_to_io_dev(bdev));
    6712          15 :                 bdev_start_reset(ch);
    6713          15 :         }
    6714          16 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6715          16 : }
    6716             : 
    6717             : int
    6718          16 : spdk_bdev_reset(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6719             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    6720             : {
    6721          16 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6722             :         struct spdk_bdev_io *bdev_io;
    6723          16 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6724             : 
    6725          16 :         bdev_io = bdev_channel_get_io(channel);
    6726          16 :         if (!bdev_io) {
    6727           0 :                 return -ENOMEM;
    6728             :         }
    6729             : 
    6730          16 :         bdev_io->internal.ch = channel;
    6731          16 :         bdev_io->internal.desc = desc;
    6732          16 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    6733          16 :         bdev_io->type = SPDK_BDEV_IO_TYPE_RESET;
    6734          16 :         bdev_io->u.reset.ch_ref = NULL;
    6735          16 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6736             : 
    6737          16 :         spdk_spin_lock(&bdev->internal.spinlock);
    6738          16 :         TAILQ_INSERT_TAIL(&channel->queued_resets, bdev_io, internal.link);
    6739          16 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6740             : 
    6741          16 :         bdev_ch_add_to_io_submitted(bdev_io);
    6742             : 
    6743          16 :         bdev_channel_start_reset(channel);
    6744             : 
    6745          16 :         return 0;
    6746          16 : }
    6747             : 
    6748             : void
    6749           0 : spdk_bdev_get_io_stat(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    6750             :                       struct spdk_bdev_io_stat *stat, enum spdk_bdev_reset_stat_mode reset_mode)
    6751             : {
    6752           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6753             : 
    6754           0 :         bdev_get_io_stat(stat, channel->stat);
    6755           0 :         spdk_bdev_reset_io_stat(stat, reset_mode);
    6756           0 : }
    6757             : 
    6758             : static void
    6759           5 : bdev_get_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6760             : {
    6761           5 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    6762             : 
    6763          10 :         bdev_iostat_ctx->cb(bdev, bdev_iostat_ctx->stat,
    6764           5 :                             bdev_iostat_ctx->cb_arg, 0);
    6765           5 :         free(bdev_iostat_ctx);
    6766           5 : }
    6767             : 
    6768             : static void
    6769           4 : bdev_get_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6770             :                            struct spdk_io_channel *ch, void *_ctx)
    6771             : {
    6772           4 :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx = _ctx;
    6773           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6774             : 
    6775           4 :         spdk_bdev_add_io_stat(bdev_iostat_ctx->stat, channel->stat);
    6776           4 :         spdk_bdev_reset_io_stat(channel->stat, bdev_iostat_ctx->reset_mode);
    6777           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    6778           4 : }
    6779             : 
    6780             : void
    6781           5 : spdk_bdev_get_device_stat(struct spdk_bdev *bdev, struct spdk_bdev_io_stat *stat,
    6782             :                           enum spdk_bdev_reset_stat_mode reset_mode, spdk_bdev_get_device_stat_cb cb, void *cb_arg)
    6783             : {
    6784             :         struct spdk_bdev_iostat_ctx *bdev_iostat_ctx;
    6785             : 
    6786           5 :         assert(bdev != NULL);
    6787           5 :         assert(stat != NULL);
    6788           5 :         assert(cb != NULL);
    6789             : 
    6790           5 :         bdev_iostat_ctx = calloc(1, sizeof(struct spdk_bdev_iostat_ctx));
    6791           5 :         if (bdev_iostat_ctx == NULL) {
    6792           0 :                 SPDK_ERRLOG("Unable to allocate memory for spdk_bdev_iostat_ctx\n");
    6793           0 :                 cb(bdev, stat, cb_arg, -ENOMEM);
    6794           0 :                 return;
    6795             :         }
    6796             : 
    6797           5 :         bdev_iostat_ctx->stat = stat;
    6798           5 :         bdev_iostat_ctx->cb = cb;
    6799           5 :         bdev_iostat_ctx->cb_arg = cb_arg;
    6800           5 :         bdev_iostat_ctx->reset_mode = reset_mode;
    6801             : 
    6802             :         /* Start with the statistics from previously deleted channels. */
    6803           5 :         spdk_spin_lock(&bdev->internal.spinlock);
    6804           5 :         bdev_get_io_stat(bdev_iostat_ctx->stat, bdev->internal.stat);
    6805           5 :         spdk_bdev_reset_io_stat(bdev->internal.stat, reset_mode);
    6806           5 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6807             : 
    6808             :         /* Then iterate and add the statistics from each existing channel. */
    6809           5 :         spdk_bdev_for_each_channel(bdev, bdev_get_each_channel_stat, bdev_iostat_ctx,
    6810             :                                    bdev_get_device_stat_done);
    6811           5 : }
    6812             : 
    6813             : struct bdev_iostat_reset_ctx {
    6814             :         enum spdk_bdev_reset_stat_mode mode;
    6815             :         bdev_reset_device_stat_cb cb;
    6816             :         void *cb_arg;
    6817             : };
    6818             : 
    6819             : static void
    6820           0 : bdev_reset_device_stat_done(struct spdk_bdev *bdev, void *_ctx, int status)
    6821             : {
    6822           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    6823             : 
    6824           0 :         ctx->cb(bdev, ctx->cb_arg, 0);
    6825             : 
    6826           0 :         free(ctx);
    6827           0 : }
    6828             : 
    6829             : static void
    6830           0 : bdev_reset_each_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    6831             :                              struct spdk_io_channel *ch, void *_ctx)
    6832             : {
    6833           0 :         struct bdev_iostat_reset_ctx *ctx = _ctx;
    6834           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6835             : 
    6836           0 :         spdk_bdev_reset_io_stat(channel->stat, ctx->mode);
    6837             : 
    6838           0 :         spdk_bdev_for_each_channel_continue(i, 0);
    6839           0 : }
    6840             : 
    6841             : void
    6842           0 : bdev_reset_device_stat(struct spdk_bdev *bdev, enum spdk_bdev_reset_stat_mode mode,
    6843             :                        bdev_reset_device_stat_cb cb, void *cb_arg)
    6844             : {
    6845             :         struct bdev_iostat_reset_ctx *ctx;
    6846             : 
    6847           0 :         assert(bdev != NULL);
    6848           0 :         assert(cb != NULL);
    6849             : 
    6850           0 :         ctx = calloc(1, sizeof(*ctx));
    6851           0 :         if (ctx == NULL) {
    6852           0 :                 SPDK_ERRLOG("Unable to allocate bdev_iostat_reset_ctx.\n");
    6853           0 :                 cb(bdev, cb_arg, -ENOMEM);
    6854           0 :                 return;
    6855             :         }
    6856             : 
    6857           0 :         ctx->mode = mode;
    6858           0 :         ctx->cb = cb;
    6859           0 :         ctx->cb_arg = cb_arg;
    6860             : 
    6861           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    6862           0 :         spdk_bdev_reset_io_stat(bdev->internal.stat, mode);
    6863           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    6864             : 
    6865           0 :         spdk_bdev_for_each_channel(bdev,
    6866             :                                    bdev_reset_each_channel_stat,
    6867           0 :                                    ctx,
    6868             :                                    bdev_reset_device_stat_done);
    6869           0 : }
    6870             : 
    6871             : int
    6872           1 : spdk_bdev_nvme_admin_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6873             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    6874             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6875             : {
    6876           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6877             :         struct spdk_bdev_io *bdev_io;
    6878           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6879             : 
    6880           1 :         if (!desc->write) {
    6881           0 :                 return -EBADF;
    6882             :         }
    6883             : 
    6884           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_ADMIN))) {
    6885           1 :                 return -ENOTSUP;
    6886             :         }
    6887             : 
    6888           0 :         bdev_io = bdev_channel_get_io(channel);
    6889           0 :         if (!bdev_io) {
    6890           0 :                 return -ENOMEM;
    6891             :         }
    6892             : 
    6893           0 :         bdev_io->internal.ch = channel;
    6894           0 :         bdev_io->internal.desc = desc;
    6895           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_ADMIN;
    6896           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    6897           0 :         bdev_io->u.nvme_passthru.buf = buf;
    6898           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    6899           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    6900           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    6901             : 
    6902           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6903             : 
    6904           0 :         bdev_io_submit(bdev_io);
    6905           0 :         return 0;
    6906           1 : }
    6907             : 
    6908             : int
    6909           1 : spdk_bdev_nvme_io_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6910             :                            const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
    6911             :                            spdk_bdev_io_completion_cb cb, void *cb_arg)
    6912             : {
    6913           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6914             :         struct spdk_bdev_io *bdev_io;
    6915           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6916             : 
    6917           1 :         if (!desc->write) {
    6918             :                 /*
    6919             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    6920             :                  *  to easily determine if the command is a read or write, but for now just
    6921             :                  *  do not allow io_passthru with a read-only descriptor.
    6922             :                  */
    6923           0 :                 return -EBADF;
    6924             :         }
    6925             : 
    6926           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    6927           1 :                 return -ENOTSUP;
    6928             :         }
    6929             : 
    6930           0 :         bdev_io = bdev_channel_get_io(channel);
    6931           0 :         if (!bdev_io) {
    6932           0 :                 return -ENOMEM;
    6933             :         }
    6934             : 
    6935           0 :         bdev_io->internal.ch = channel;
    6936           0 :         bdev_io->internal.desc = desc;
    6937           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO;
    6938           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    6939           0 :         bdev_io->u.nvme_passthru.buf = buf;
    6940           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    6941           0 :         bdev_io->u.nvme_passthru.md_buf = NULL;
    6942           0 :         bdev_io->u.nvme_passthru.md_len = 0;
    6943             : 
    6944           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6945             : 
    6946           0 :         bdev_io_submit(bdev_io);
    6947           0 :         return 0;
    6948           1 : }
    6949             : 
    6950             : int
    6951           1 : spdk_bdev_nvme_io_passthru_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    6952             :                               const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes, void *md_buf, size_t md_len,
    6953             :                               spdk_bdev_io_completion_cb cb, void *cb_arg)
    6954             : {
    6955           1 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    6956             :         struct spdk_bdev_io *bdev_io;
    6957           1 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    6958             : 
    6959           1 :         if (!desc->write) {
    6960             :                 /*
    6961             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    6962             :                  *  to easily determine if the command is a read or write, but for now just
    6963             :                  *  do not allow io_passthru with a read-only descriptor.
    6964             :                  */
    6965           0 :                 return -EBADF;
    6966             :         }
    6967             : 
    6968           1 :         if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    6969           1 :                 return -ENOTSUP;
    6970             :         }
    6971             : 
    6972           0 :         bdev_io = bdev_channel_get_io(channel);
    6973           0 :         if (!bdev_io) {
    6974           0 :                 return -ENOMEM;
    6975             :         }
    6976             : 
    6977           0 :         bdev_io->internal.ch = channel;
    6978           0 :         bdev_io->internal.desc = desc;
    6979           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO_MD;
    6980           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    6981           0 :         bdev_io->u.nvme_passthru.buf = buf;
    6982           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    6983           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    6984           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    6985             : 
    6986           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    6987             : 
    6988           0 :         bdev_io_submit(bdev_io);
    6989           0 :         return 0;
    6990           1 : }
    6991             : 
    6992             : int
    6993           0 : spdk_bdev_nvme_iov_passthru_md(struct spdk_bdev_desc *desc,
    6994             :                                struct spdk_io_channel *ch,
    6995             :                                const struct spdk_nvme_cmd *cmd,
    6996             :                                struct iovec *iov, int iovcnt, size_t nbytes,
    6997             :                                void *md_buf, size_t md_len,
    6998             :                                spdk_bdev_io_completion_cb cb, void *cb_arg)
    6999             : {
    7000           0 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7001             :         struct spdk_bdev_io *bdev_io;
    7002           0 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7003             : 
    7004           0 :         if (!desc->write) {
    7005             :                 /*
    7006             :                  * Do not try to parse the NVMe command - we could maybe use bits in the opcode
    7007             :                  * to easily determine if the command is a read or write, but for now just
    7008             :                  * do not allow io_passthru with a read-only descriptor.
    7009             :                  */
    7010           0 :                 return -EBADF;
    7011             :         }
    7012             : 
    7013           0 :         if (md_buf && spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO_MD))) {
    7014           0 :                 return -ENOTSUP;
    7015           0 :         } else if (spdk_unlikely(!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO))) {
    7016           0 :                 return -ENOTSUP;
    7017             :         }
    7018             : 
    7019           0 :         bdev_io = bdev_channel_get_io(channel);
    7020           0 :         if (!bdev_io) {
    7021           0 :                 return -ENOMEM;
    7022             :         }
    7023             : 
    7024           0 :         bdev_io->internal.ch = channel;
    7025           0 :         bdev_io->internal.desc = desc;
    7026           0 :         bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IOV_MD;
    7027           0 :         bdev_io->u.nvme_passthru.cmd = *cmd;
    7028           0 :         bdev_io->u.nvme_passthru.iovs = iov;
    7029           0 :         bdev_io->u.nvme_passthru.iovcnt = iovcnt;
    7030           0 :         bdev_io->u.nvme_passthru.nbytes = nbytes;
    7031           0 :         bdev_io->u.nvme_passthru.md_buf = md_buf;
    7032           0 :         bdev_io->u.nvme_passthru.md_len = md_len;
    7033             : 
    7034           0 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7035             : 
    7036           0 :         bdev_io_submit(bdev_io);
    7037           0 :         return 0;
    7038           0 : }
    7039             : 
    7040             : static void bdev_abort_retry(void *ctx);
    7041             : static void bdev_abort(struct spdk_bdev_io *parent_io);
    7042             : 
    7043             : static void
    7044          22 : bdev_abort_io_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    7045             : {
    7046          22 :         struct spdk_bdev_channel *channel = bdev_io->internal.ch;
    7047          22 :         struct spdk_bdev_io *parent_io = cb_arg;
    7048             :         struct spdk_bdev_io *bio_to_abort, *tmp_io;
    7049             : 
    7050          22 :         bio_to_abort = bdev_io->u.abort.bio_to_abort;
    7051             : 
    7052          22 :         spdk_bdev_free_io(bdev_io);
    7053             : 
    7054          22 :         if (!success) {
    7055             :                 /* Check if the target I/O completed in the meantime. */
    7056           2 :                 TAILQ_FOREACH(tmp_io, &channel->io_submitted, internal.ch_link) {
    7057           1 :                         if (tmp_io == bio_to_abort) {
    7058           0 :                                 break;
    7059             :                         }
    7060           1 :                 }
    7061             : 
    7062             :                 /* If the target I/O still exists, set the parent to failed. */
    7063           1 :                 if (tmp_io != NULL) {
    7064           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7065           0 :                 }
    7066           1 :         }
    7067             : 
    7068          22 :         assert(parent_io->internal.f.split);
    7069             : 
    7070          22 :         parent_io->internal.split.outstanding--;
    7071          22 :         if (parent_io->internal.split.outstanding == 0) {
    7072          16 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7073           0 :                         bdev_abort_retry(parent_io);
    7074           0 :                 } else {
    7075          16 :                         bdev_io_complete(parent_io);
    7076             :                 }
    7077          16 :         }
    7078          22 : }
    7079             : 
    7080             : static int
    7081          23 : bdev_abort_io(struct spdk_bdev_desc *desc, struct spdk_bdev_channel *channel,
    7082             :               struct spdk_bdev_io *bio_to_abort,
    7083             :               spdk_bdev_io_completion_cb cb, void *cb_arg)
    7084             : {
    7085          23 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7086             :         struct spdk_bdev_io *bdev_io;
    7087             : 
    7088          23 :         if (bio_to_abort->type == SPDK_BDEV_IO_TYPE_ABORT ||
    7089          23 :             bio_to_abort->type == SPDK_BDEV_IO_TYPE_RESET) {
    7090             :                 /* TODO: Abort reset or abort request. */
    7091           0 :                 return -ENOTSUP;
    7092             :         }
    7093             : 
    7094          23 :         bdev_io = bdev_channel_get_io(channel);
    7095          23 :         if (bdev_io == NULL) {
    7096           1 :                 return -ENOMEM;
    7097             :         }
    7098             : 
    7099          22 :         bdev_io->internal.ch = channel;
    7100          22 :         bdev_io->internal.desc = desc;
    7101          22 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7102          22 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7103             : 
    7104          22 :         if (bio_to_abort->internal.f.split) {
    7105           6 :                 assert(bdev_io_should_split(bio_to_abort));
    7106           6 :                 bdev_io->u.bdev.abort.bio_cb_arg = bio_to_abort;
    7107             : 
    7108             :                 /* Parent abort request is not submitted directly, but to manage its
    7109             :                  * execution add it to the submitted list here.
    7110             :                  */
    7111           6 :                 bdev_io->internal.submit_tsc = spdk_get_ticks();
    7112           6 :                 bdev_ch_add_to_io_submitted(bdev_io);
    7113             : 
    7114           6 :                 bdev_abort(bdev_io);
    7115             : 
    7116           6 :                 return 0;
    7117             :         }
    7118             : 
    7119          16 :         bdev_io->u.abort.bio_to_abort = bio_to_abort;
    7120             : 
    7121             :         /* Submit the abort request to the underlying bdev module. */
    7122          16 :         bdev_io_submit(bdev_io);
    7123             : 
    7124          16 :         return 0;
    7125          23 : }
    7126             : 
    7127             : static bool
    7128          46 : bdev_io_on_tailq(struct spdk_bdev_io *bdev_io, bdev_io_tailq_t *tailq)
    7129             : {
    7130             :         struct spdk_bdev_io *iter;
    7131             : 
    7132          46 :         TAILQ_FOREACH(iter, tailq, internal.link) {
    7133           0 :                 if (iter == bdev_io) {
    7134           0 :                         return true;
    7135             :                 }
    7136           0 :         }
    7137             : 
    7138          46 :         return false;
    7139          46 : }
    7140             : 
    7141             : static uint32_t
    7142          18 : _bdev_abort(struct spdk_bdev_io *parent_io)
    7143             : {
    7144          18 :         struct spdk_bdev_desc *desc = parent_io->internal.desc;
    7145          18 :         struct spdk_bdev_channel *channel = parent_io->internal.ch;
    7146             :         void *bio_cb_arg;
    7147             :         struct spdk_bdev_io *bio_to_abort;
    7148             :         uint32_t matched_ios;
    7149             :         int rc;
    7150             : 
    7151          18 :         bio_cb_arg = parent_io->u.bdev.abort.bio_cb_arg;
    7152             : 
    7153             :         /* matched_ios is returned and will be kept by the caller.
    7154             :          *
    7155             :          * This function will be used for two cases, 1) the same cb_arg is used for
    7156             :          * multiple I/Os, 2) a single large I/O is split into smaller ones.
    7157             :          * Incrementing split_outstanding directly here may confuse readers especially
    7158             :          * for the 1st case.
    7159             :          *
    7160             :          * Completion of I/O abort is processed after stack unwinding. Hence this trick
    7161             :          * works as expected.
    7162             :          */
    7163          18 :         matched_ios = 0;
    7164          18 :         parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7165             : 
    7166         105 :         TAILQ_FOREACH(bio_to_abort, &channel->io_submitted, internal.ch_link) {
    7167          88 :                 if (bio_to_abort->internal.caller_ctx != bio_cb_arg) {
    7168          65 :                         continue;
    7169             :                 }
    7170             : 
    7171          23 :                 if (bio_to_abort->internal.submit_tsc > parent_io->internal.submit_tsc) {
    7172             :                         /* Any I/O which was submitted after this abort command should be excluded. */
    7173           0 :                         continue;
    7174             :                 }
    7175             : 
    7176             :                 /* We can't abort a request that's being pushed/pulled or executed by accel */
    7177          23 :                 if (bdev_io_on_tailq(bio_to_abort, &channel->io_accel_exec) ||
    7178          23 :                     bdev_io_on_tailq(bio_to_abort, &channel->io_memory_domain)) {
    7179           0 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7180           0 :                         break;
    7181             :                 }
    7182             : 
    7183          23 :                 rc = bdev_abort_io(desc, channel, bio_to_abort, bdev_abort_io_done, parent_io);
    7184          23 :                 if (rc != 0) {
    7185           1 :                         if (rc == -ENOMEM) {
    7186           1 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_NOMEM;
    7187           1 :                         } else {
    7188           0 :                                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7189             :                         }
    7190           1 :                         break;
    7191             :                 }
    7192          22 :                 matched_ios++;
    7193          22 :         }
    7194             : 
    7195          18 :         return matched_ios;
    7196             : }
    7197             : 
    7198             : static void
    7199           1 : bdev_abort_retry(void *ctx)
    7200             : {
    7201           1 :         struct spdk_bdev_io *parent_io = ctx;
    7202             :         uint32_t matched_ios;
    7203             : 
    7204           1 :         matched_ios = _bdev_abort(parent_io);
    7205             : 
    7206           1 :         if (matched_ios == 0) {
    7207           0 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7208           0 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7209           0 :                 } else {
    7210             :                         /* For retry, the case that no target I/O was found is success
    7211             :                          * because it means target I/Os completed in the meantime.
    7212             :                          */
    7213           0 :                         bdev_io_complete(parent_io);
    7214             :                 }
    7215           0 :                 return;
    7216             :         }
    7217             : 
    7218             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7219           1 :         parent_io->internal.f.split = true;
    7220           1 :         parent_io->internal.split.outstanding = matched_ios;
    7221           1 : }
    7222             : 
    7223             : static void
    7224          17 : bdev_abort(struct spdk_bdev_io *parent_io)
    7225             : {
    7226             :         uint32_t matched_ios;
    7227             : 
    7228          17 :         matched_ios = _bdev_abort(parent_io);
    7229             : 
    7230          17 :         if (matched_ios == 0) {
    7231           2 :                 if (parent_io->internal.status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7232           1 :                         bdev_queue_io_wait_with_cb(parent_io, bdev_abort_retry);
    7233           1 :                 } else {
    7234             :                         /* The case the no target I/O was found is failure. */
    7235           1 :                         parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7236           1 :                         bdev_io_complete(parent_io);
    7237             :                 }
    7238           2 :                 return;
    7239             :         }
    7240             : 
    7241             :         /* Use split_outstanding to manage the progress of aborting I/Os. */
    7242          15 :         parent_io->internal.f.split = true;
    7243          15 :         parent_io->internal.split.outstanding = matched_ios;
    7244          17 : }
    7245             : 
    7246             : int
    7247          12 : spdk_bdev_abort(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
    7248             :                 void *bio_cb_arg,
    7249             :                 spdk_bdev_io_completion_cb cb, void *cb_arg)
    7250             : {
    7251          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    7252          12 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7253             :         struct spdk_bdev_io *bdev_io;
    7254             : 
    7255          12 :         if (bio_cb_arg == NULL) {
    7256           0 :                 return -EINVAL;
    7257             :         }
    7258             : 
    7259          12 :         if (!spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ABORT)) {
    7260           1 :                 return -ENOTSUP;
    7261             :         }
    7262             : 
    7263          11 :         bdev_io = bdev_channel_get_io(channel);
    7264          11 :         if (bdev_io == NULL) {
    7265           0 :                 return -ENOMEM;
    7266             :         }
    7267             : 
    7268          11 :         bdev_io->internal.ch = channel;
    7269          11 :         bdev_io->internal.desc = desc;
    7270          11 :         bdev_io->internal.submit_tsc = spdk_get_ticks();
    7271          11 :         bdev_io->type = SPDK_BDEV_IO_TYPE_ABORT;
    7272          11 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
    7273             : 
    7274          11 :         bdev_io->u.bdev.abort.bio_cb_arg = bio_cb_arg;
    7275             : 
    7276             :         /* Parent abort request is not submitted directly, but to manage its execution,
    7277             :          * add it to the submitted list here.
    7278             :          */
    7279          11 :         bdev_ch_add_to_io_submitted(bdev_io);
    7280             : 
    7281          11 :         bdev_abort(bdev_io);
    7282             : 
    7283          11 :         return 0;
    7284          12 : }
    7285             : 
    7286             : int
    7287           4 : spdk_bdev_queue_io_wait(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
    7288             :                         struct spdk_bdev_io_wait_entry *entry)
    7289             : {
    7290           4 :         struct spdk_bdev_channel *channel = __io_ch_to_bdev_ch(ch);
    7291           4 :         struct spdk_bdev_mgmt_channel *mgmt_ch = channel->shared_resource->mgmt_ch;
    7292             : 
    7293           4 :         if (bdev != entry->bdev) {
    7294           0 :                 SPDK_ERRLOG("bdevs do not match\n");
    7295           0 :                 return -EINVAL;
    7296             :         }
    7297             : 
    7298           4 :         if (mgmt_ch->per_thread_cache_count > 0) {
    7299           0 :                 SPDK_ERRLOG("Cannot queue io_wait if spdk_bdev_io available in per-thread cache\n");
    7300           0 :                 return -EINVAL;
    7301             :         }
    7302             : 
    7303           4 :         TAILQ_INSERT_TAIL(&mgmt_ch->io_wait_queue, entry, link);
    7304           4 :         return 0;
    7305           4 : }
    7306             : 
    7307             : static inline void
    7308         610 : bdev_io_update_io_stat(struct spdk_bdev_io *bdev_io, uint64_t tsc_diff)
    7309             : {
    7310         610 :         enum spdk_bdev_io_status io_status = bdev_io->internal.status;
    7311         610 :         struct spdk_bdev_io_stat *io_stat = bdev_io->internal.ch->stat;
    7312         610 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    7313         610 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    7314             : 
    7315         610 :         if (spdk_likely(io_status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7316         516 :                 switch (bdev_io->type) {
    7317             :                 case SPDK_BDEV_IO_TYPE_READ:
    7318         321 :                         io_stat->bytes_read += num_blocks * blocklen;
    7319         321 :                         io_stat->num_read_ops++;
    7320         321 :                         io_stat->read_latency_ticks += tsc_diff;
    7321         321 :                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7322           7 :                                 io_stat->max_read_latency_ticks = tsc_diff;
    7323           7 :                         }
    7324         321 :                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7325          42 :                                 io_stat->min_read_latency_ticks = tsc_diff;
    7326          42 :                         }
    7327         321 :                         break;
    7328             :                 case SPDK_BDEV_IO_TYPE_WRITE:
    7329          75 :                         io_stat->bytes_written += num_blocks * blocklen;
    7330          75 :                         io_stat->num_write_ops++;
    7331          75 :                         io_stat->write_latency_ticks += tsc_diff;
    7332          75 :                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7333           4 :                                 io_stat->max_write_latency_ticks = tsc_diff;
    7334           4 :                         }
    7335          75 :                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7336          25 :                                 io_stat->min_write_latency_ticks = tsc_diff;
    7337          25 :                         }
    7338          75 :                         break;
    7339             :                 case SPDK_BDEV_IO_TYPE_UNMAP:
    7340          20 :                         io_stat->bytes_unmapped += num_blocks * blocklen;
    7341          20 :                         io_stat->num_unmap_ops++;
    7342          20 :                         io_stat->unmap_latency_ticks += tsc_diff;
    7343          20 :                         if (io_stat->max_unmap_latency_ticks < tsc_diff) {
    7344           0 :                                 io_stat->max_unmap_latency_ticks = tsc_diff;
    7345           0 :                         }
    7346          20 :                         if (io_stat->min_unmap_latency_ticks > tsc_diff) {
    7347           3 :                                 io_stat->min_unmap_latency_ticks = tsc_diff;
    7348           3 :                         }
    7349          20 :                         break;
    7350             :                 case SPDK_BDEV_IO_TYPE_ZCOPY:
    7351             :                         /* Track the data in the start phase only */
    7352           4 :                         if (bdev_io->u.bdev.zcopy.start) {
    7353           2 :                                 if (bdev_io->u.bdev.zcopy.populate) {
    7354           1 :                                         io_stat->bytes_read += num_blocks * blocklen;
    7355           1 :                                         io_stat->num_read_ops++;
    7356           1 :                                         io_stat->read_latency_ticks += tsc_diff;
    7357           1 :                                         if (io_stat->max_read_latency_ticks < tsc_diff) {
    7358           0 :                                                 io_stat->max_read_latency_ticks = tsc_diff;
    7359           0 :                                         }
    7360           1 :                                         if (io_stat->min_read_latency_ticks > tsc_diff) {
    7361           1 :                                                 io_stat->min_read_latency_ticks = tsc_diff;
    7362           1 :                                         }
    7363           1 :                                 } else {
    7364           1 :                                         io_stat->bytes_written += num_blocks * blocklen;
    7365           1 :                                         io_stat->num_write_ops++;
    7366           1 :                                         io_stat->write_latency_ticks += tsc_diff;
    7367           1 :                                         if (io_stat->max_write_latency_ticks < tsc_diff) {
    7368           0 :                                                 io_stat->max_write_latency_ticks = tsc_diff;
    7369           0 :                                         }
    7370           1 :                                         if (io_stat->min_write_latency_ticks > tsc_diff) {
    7371           1 :                                                 io_stat->min_write_latency_ticks = tsc_diff;
    7372           1 :                                         }
    7373             :                                 }
    7374           2 :                         }
    7375           4 :                         break;
    7376             :                 case SPDK_BDEV_IO_TYPE_COPY:
    7377          21 :                         io_stat->bytes_copied += num_blocks * blocklen;
    7378          21 :                         io_stat->num_copy_ops++;
    7379          21 :                         bdev_io->internal.ch->stat->copy_latency_ticks += tsc_diff;
    7380          21 :                         if (io_stat->max_copy_latency_ticks < tsc_diff) {
    7381           0 :                                 io_stat->max_copy_latency_ticks = tsc_diff;
    7382           0 :                         }
    7383          21 :                         if (io_stat->min_copy_latency_ticks > tsc_diff) {
    7384           4 :                                 io_stat->min_copy_latency_ticks = tsc_diff;
    7385           4 :                         }
    7386          21 :                         break;
    7387             :                 default:
    7388          75 :                         break;
    7389             :                 }
    7390         610 :         } else if (io_status <= SPDK_BDEV_IO_STATUS_FAILED && io_status >= SPDK_MIN_BDEV_IO_STATUS) {
    7391          94 :                 io_stat = bdev_io->bdev->internal.stat;
    7392          94 :                 assert(io_stat->io_error != NULL);
    7393             : 
    7394          94 :                 spdk_spin_lock(&bdev_io->bdev->internal.spinlock);
    7395          94 :                 io_stat->io_error->error_status[-io_status - 1]++;
    7396          94 :                 spdk_spin_unlock(&bdev_io->bdev->internal.spinlock);
    7397          94 :         }
    7398             : 
    7399             : #ifdef SPDK_CONFIG_VTUNE
    7400             :         uint64_t now_tsc = spdk_get_ticks();
    7401             :         if (now_tsc > (bdev_io->internal.ch->start_tsc + bdev_io->internal.ch->interval_tsc)) {
    7402             :                 uint64_t data[5];
    7403             :                 struct spdk_bdev_io_stat *prev_stat = bdev_io->internal.ch->prev_stat;
    7404             : 
    7405             :                 data[0] = io_stat->num_read_ops - prev_stat->num_read_ops;
    7406             :                 data[1] = io_stat->bytes_read - prev_stat->bytes_read;
    7407             :                 data[2] = io_stat->num_write_ops - prev_stat->num_write_ops;
    7408             :                 data[3] = io_stat->bytes_written - prev_stat->bytes_written;
    7409             :                 data[4] = bdev_io->bdev->fn_table->get_spin_time ?
    7410             :                           bdev_io->bdev->fn_table->get_spin_time(spdk_bdev_io_get_io_channel(bdev_io)) : 0;
    7411             : 
    7412             :                 __itt_metadata_add(g_bdev_mgr.domain, __itt_null, bdev_io->internal.ch->handle,
    7413             :                                    __itt_metadata_u64, 5, data);
    7414             : 
    7415             :                 memcpy(prev_stat, io_stat, sizeof(struct spdk_bdev_io_stat));
    7416             :                 bdev_io->internal.ch->start_tsc = now_tsc;
    7417             :         }
    7418             : #endif
    7419         610 : }
    7420             : 
    7421             : static inline void
    7422         610 : _bdev_io_complete(void *ctx)
    7423             : {
    7424         610 :         struct spdk_bdev_io *bdev_io = ctx;
    7425             : 
    7426         610 :         if (spdk_unlikely(bdev_io_use_accel_sequence(bdev_io))) {
    7427           0 :                 assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7428           0 :                 spdk_accel_sequence_abort(bdev_io->internal.accel_sequence);
    7429           0 :         }
    7430             : 
    7431         610 :         assert(bdev_io->internal.cb != NULL);
    7432         610 :         assert(spdk_get_thread() == spdk_bdev_io_get_thread(bdev_io));
    7433             : 
    7434        1220 :         bdev_io->internal.cb(bdev_io, bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS,
    7435         610 :                              bdev_io->internal.caller_ctx);
    7436         610 : }
    7437             : 
    7438             : static inline void
    7439         618 : bdev_io_complete(void *ctx)
    7440             : {
    7441         618 :         struct spdk_bdev_io *bdev_io = ctx;
    7442         618 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7443             :         uint64_t tsc, tsc_diff;
    7444             : 
    7445         618 :         if (spdk_unlikely(bdev_io->internal.f.in_submit_request)) {
    7446             :                 /*
    7447             :                  * Defer completion to avoid potential infinite recursion if the
    7448             :                  * user's completion callback issues a new I/O.
    7449             :                  */
    7450          16 :                 spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7451           8 :                                      bdev_io_complete, bdev_io);
    7452           8 :                 return;
    7453             :         }
    7454             : 
    7455         610 :         tsc = spdk_get_ticks();
    7456         610 :         tsc_diff = tsc - bdev_io->internal.submit_tsc;
    7457             : 
    7458         610 :         bdev_ch_remove_from_io_submitted(bdev_io);
    7459         610 :         spdk_trace_record_tsc(tsc, TRACE_BDEV_IO_DONE, bdev_ch->trace_id, 0, (uintptr_t)bdev_io,
    7460             :                               bdev_io->internal.caller_ctx, bdev_ch->queue_depth);
    7461             : 
    7462         610 :         if (bdev_ch->histogram) {
    7463           4 :                 if (bdev_io->bdev->internal.histogram_io_type == 0 ||
    7464           0 :                     bdev_io->bdev->internal.histogram_io_type == bdev_io->type) {
    7465             :                         /*
    7466             :                          * Tally all I/O types if the histogram_io_type is set to 0.
    7467             :                          */
    7468           4 :                         spdk_histogram_data_tally(bdev_ch->histogram, tsc_diff);
    7469           4 :                 }
    7470           4 :         }
    7471             : 
    7472         610 :         bdev_io_update_io_stat(bdev_io, tsc_diff);
    7473         610 :         _bdev_io_complete(bdev_io);
    7474         618 : }
    7475             : 
    7476             : /* The difference between this function and bdev_io_complete() is that this should be called to
    7477             :  * complete IOs that haven't been submitted via bdev_io_submit(), as they weren't added onto the
    7478             :  * io_submitted list and don't have submit_tsc updated.
    7479             :  */
    7480             : static inline void
    7481           0 : bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io)
    7482             : {
    7483             :         /* Since the IO hasn't been submitted it's bound to be failed */
    7484           0 :         assert(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_SUCCESS);
    7485             : 
    7486             :         /* At this point we don't know if the IO is completed from submission context or not, but,
    7487             :          * since this is an error path, we can always do an spdk_thread_send_msg(). */
    7488           0 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    7489           0 :                              _bdev_io_complete, bdev_io);
    7490           0 : }
    7491             : 
    7492             : static void bdev_destroy_cb(void *io_device);
    7493             : 
    7494             : static void
    7495          15 : bdev_reset_complete(struct spdk_bdev *bdev, void *_ctx, int status)
    7496             : {
    7497          15 :         struct spdk_bdev_io *bdev_io = _ctx;
    7498             : 
    7499          15 :         if (bdev_io->u.reset.ch_ref != NULL) {
    7500          15 :                 spdk_put_io_channel(bdev_io->u.reset.ch_ref);
    7501          15 :                 bdev_io->u.reset.ch_ref = NULL;
    7502          15 :         }
    7503             : 
    7504          15 :         bdev_io_complete(bdev_io);
    7505             : 
    7506          15 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING &&
    7507           1 :             TAILQ_EMPTY(&bdev->internal.open_descs)) {
    7508           1 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    7509           1 :         }
    7510          15 : }
    7511             : 
    7512             : static void
    7513          18 : bdev_unfreeze_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    7514             :                       struct spdk_io_channel *_ch, void *_ctx)
    7515             : {
    7516          18 :         struct spdk_bdev_io *bdev_io = _ctx;
    7517          18 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    7518             :         struct spdk_bdev_io *queued_reset;
    7519             : 
    7520          18 :         ch->flags &= ~BDEV_CH_RESET_IN_PROGRESS;
    7521          18 :         while (!TAILQ_EMPTY(&ch->queued_resets)) {
    7522           0 :                 queued_reset = TAILQ_FIRST(&ch->queued_resets);
    7523           0 :                 TAILQ_REMOVE(&ch->queued_resets, queued_reset, internal.link);
    7524           0 :                 spdk_bdev_io_complete(queued_reset, bdev_io->internal.status);
    7525             :         }
    7526             : 
    7527          18 :         spdk_bdev_for_each_channel_continue(i, 0);
    7528          18 : }
    7529             : 
    7530             : static void
    7531           0 : bdev_io_complete_sequence_cb(void *ctx, int status)
    7532             : {
    7533           0 :         struct spdk_bdev_io *bdev_io = ctx;
    7534             : 
    7535             :         /* u.bdev.accel_sequence should have already been cleared at this point */
    7536           0 :         assert(bdev_io->u.bdev.accel_sequence == NULL);
    7537           0 :         assert(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS);
    7538           0 :         bdev_io->internal.f.has_accel_sequence = false;
    7539             : 
    7540           0 :         if (spdk_unlikely(status != 0)) {
    7541           0 :                 SPDK_ERRLOG("Failed to execute accel sequence, status=%d\n", status);
    7542           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
    7543           0 :         }
    7544             : 
    7545           0 :         bdev_io_complete(bdev_io);
    7546           0 : }
    7547             : 
    7548             : void
    7549         598 : spdk_bdev_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status)
    7550             : {
    7551         598 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7552         598 :         struct spdk_bdev_channel *bdev_ch = bdev_io->internal.ch;
    7553         598 :         struct spdk_bdev_shared_resource *shared_resource = bdev_ch->shared_resource;
    7554             : 
    7555         598 :         if (spdk_unlikely(bdev_io->internal.status != SPDK_BDEV_IO_STATUS_PENDING)) {
    7556           0 :                 SPDK_ERRLOG("Unexpected completion on IO from %s module, status was %s\n",
    7557             :                             spdk_bdev_get_module_name(bdev),
    7558             :                             bdev_io_status_get_string(bdev_io->internal.status));
    7559           0 :                 assert(false);
    7560             :         }
    7561         598 :         bdev_io->internal.status = status;
    7562             : 
    7563         598 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_RESET)) {
    7564          16 :                 bool unlock_channels = false;
    7565             : 
    7566          16 :                 if (status == SPDK_BDEV_IO_STATUS_NOMEM) {
    7567           0 :                         SPDK_ERRLOG("NOMEM returned for reset\n");
    7568           0 :                 }
    7569          16 :                 spdk_spin_lock(&bdev->internal.spinlock);
    7570          16 :                 if (bdev_io == bdev->internal.reset_in_progress) {
    7571          15 :                         bdev->internal.reset_in_progress = NULL;
    7572          15 :                         unlock_channels = true;
    7573          15 :                 }
    7574          16 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    7575             : 
    7576          16 :                 if (unlock_channels) {
    7577          15 :                         spdk_bdev_for_each_channel(bdev, bdev_unfreeze_channel, bdev_io,
    7578             :                                                    bdev_reset_complete);
    7579          15 :                         return;
    7580             :                 }
    7581           1 :         } else {
    7582         582 :                 bdev_io_decrement_outstanding(bdev_ch, shared_resource);
    7583         582 :                 if (spdk_likely(status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7584         485 :                         if (bdev_io_needs_sequence_exec(bdev_io->internal.desc, bdev_io)) {
    7585           0 :                                 bdev_io_exec_sequence(bdev_io, bdev_io_complete_sequence_cb);
    7586           0 :                                 return;
    7587         485 :                         } else if (spdk_unlikely(bdev_io->internal.f.has_bounce_buf &&
    7588             :                                                  !bdev_io_use_accel_sequence(bdev_io))) {
    7589          26 :                                 _bdev_io_push_bounce_data_buffer(bdev_io,
    7590             :                                                                  _bdev_io_complete_push_bounce_done);
    7591             :                                 /* bdev IO will be completed in the callback */
    7592          26 :                                 return;
    7593             :                         }
    7594         459 :                 }
    7595             : 
    7596         556 :                 if (spdk_unlikely(_bdev_io_handle_no_mem(bdev_io, BDEV_IO_RETRY_STATE_SUBMIT))) {
    7597           5 :                         return;
    7598             :                 }
    7599             :         }
    7600             : 
    7601         552 :         bdev_io_complete(bdev_io);
    7602         598 : }
    7603             : 
    7604             : void
    7605           0 : spdk_bdev_io_complete_scsi_status(struct spdk_bdev_io *bdev_io, enum spdk_scsi_status sc,
    7606             :                                   enum spdk_scsi_sense sk, uint8_t asc, uint8_t ascq)
    7607             : {
    7608             :         enum spdk_bdev_io_status status;
    7609             : 
    7610           0 :         if (sc == SPDK_SCSI_STATUS_GOOD) {
    7611           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7612           0 :         } else {
    7613           0 :                 status = SPDK_BDEV_IO_STATUS_SCSI_ERROR;
    7614           0 :                 bdev_io->internal.error.scsi.sc = sc;
    7615           0 :                 bdev_io->internal.error.scsi.sk = sk;
    7616           0 :                 bdev_io->internal.error.scsi.asc = asc;
    7617           0 :                 bdev_io->internal.error.scsi.ascq = ascq;
    7618             :         }
    7619             : 
    7620           0 :         spdk_bdev_io_complete(bdev_io, status);
    7621           0 : }
    7622             : 
    7623             : void
    7624           0 : spdk_bdev_io_get_scsi_status(const struct spdk_bdev_io *bdev_io,
    7625             :                              int *sc, int *sk, int *asc, int *ascq)
    7626             : {
    7627           0 :         assert(sc != NULL);
    7628           0 :         assert(sk != NULL);
    7629           0 :         assert(asc != NULL);
    7630           0 :         assert(ascq != NULL);
    7631             : 
    7632           0 :         switch (bdev_io->internal.status) {
    7633             :         case SPDK_BDEV_IO_STATUS_SUCCESS:
    7634           0 :                 *sc = SPDK_SCSI_STATUS_GOOD;
    7635           0 :                 *sk = SPDK_SCSI_SENSE_NO_SENSE;
    7636           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7637           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7638           0 :                 break;
    7639             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    7640           0 :                 spdk_scsi_nvme_translate(bdev_io, sc, sk, asc, ascq);
    7641           0 :                 break;
    7642             :         case SPDK_BDEV_IO_STATUS_MISCOMPARE:
    7643           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7644           0 :                 *sk = SPDK_SCSI_SENSE_MISCOMPARE;
    7645           0 :                 *asc = SPDK_SCSI_ASC_MISCOMPARE_DURING_VERIFY_OPERATION;
    7646           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7647           0 :                 break;
    7648             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    7649           0 :                 *sc = bdev_io->internal.error.scsi.sc;
    7650           0 :                 *sk = bdev_io->internal.error.scsi.sk;
    7651           0 :                 *asc = bdev_io->internal.error.scsi.asc;
    7652           0 :                 *ascq = bdev_io->internal.error.scsi.ascq;
    7653           0 :                 break;
    7654             :         default:
    7655           0 :                 *sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
    7656           0 :                 *sk = SPDK_SCSI_SENSE_ABORTED_COMMAND;
    7657           0 :                 *asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
    7658           0 :                 *ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
    7659           0 :                 break;
    7660             :         }
    7661           0 : }
    7662             : 
    7663             : void
    7664           0 : spdk_bdev_io_complete_aio_status(struct spdk_bdev_io *bdev_io, int aio_result)
    7665             : {
    7666             :         enum spdk_bdev_io_status status;
    7667             : 
    7668           0 :         if (aio_result == 0) {
    7669           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7670           0 :         } else {
    7671           0 :                 status = SPDK_BDEV_IO_STATUS_AIO_ERROR;
    7672             :         }
    7673             : 
    7674           0 :         bdev_io->internal.error.aio_result = aio_result;
    7675             : 
    7676           0 :         spdk_bdev_io_complete(bdev_io, status);
    7677           0 : }
    7678             : 
    7679             : void
    7680           0 : spdk_bdev_io_get_aio_status(const struct spdk_bdev_io *bdev_io, int *aio_result)
    7681             : {
    7682           0 :         assert(aio_result != NULL);
    7683             : 
    7684           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_AIO_ERROR) {
    7685           0 :                 *aio_result = bdev_io->internal.error.aio_result;
    7686           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7687           0 :                 *aio_result = 0;
    7688           0 :         } else {
    7689           0 :                 *aio_result = -EIO;
    7690             :         }
    7691           0 : }
    7692             : 
    7693             : void
    7694           0 : spdk_bdev_io_complete_nvme_status(struct spdk_bdev_io *bdev_io, uint32_t cdw0, int sct, int sc)
    7695             : {
    7696             :         enum spdk_bdev_io_status status;
    7697             : 
    7698           0 :         if (spdk_likely(sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_SUCCESS)) {
    7699           0 :                 status = SPDK_BDEV_IO_STATUS_SUCCESS;
    7700           0 :         } else if (sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_ABORTED_BY_REQUEST) {
    7701           0 :                 status = SPDK_BDEV_IO_STATUS_ABORTED;
    7702           0 :         } else {
    7703           0 :                 status = SPDK_BDEV_IO_STATUS_NVME_ERROR;
    7704             :         }
    7705             : 
    7706           0 :         bdev_io->internal.error.nvme.cdw0 = cdw0;
    7707           0 :         bdev_io->internal.error.nvme.sct = sct;
    7708           0 :         bdev_io->internal.error.nvme.sc = sc;
    7709             : 
    7710           0 :         spdk_bdev_io_complete(bdev_io, status);
    7711           0 : }
    7712             : 
    7713             : void
    7714           0 : spdk_bdev_io_get_nvme_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0, int *sct, int *sc)
    7715             : {
    7716           0 :         assert(sct != NULL);
    7717           0 :         assert(sc != NULL);
    7718           0 :         assert(cdw0 != NULL);
    7719             : 
    7720           0 :         if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_ABORT)) {
    7721           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7722           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7723           0 :                 if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7724           0 :                         *cdw0 = 0;
    7725           0 :                 } else {
    7726           0 :                         *cdw0 = 1U;
    7727             :                 }
    7728           0 :                 return;
    7729             :         }
    7730             : 
    7731           0 :         if (spdk_likely(bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
    7732           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7733           0 :                 *sc = SPDK_NVME_SC_SUCCESS;
    7734           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    7735           0 :                 *sct = bdev_io->internal.error.nvme.sct;
    7736           0 :                 *sc = bdev_io->internal.error.nvme.sc;
    7737           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    7738           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7739           0 :                 *sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7740           0 :         } else {
    7741           0 :                 *sct = SPDK_NVME_SCT_GENERIC;
    7742           0 :                 *sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7743             :         }
    7744             : 
    7745           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    7746           0 : }
    7747             : 
    7748             : void
    7749           0 : spdk_bdev_io_get_nvme_fused_status(const struct spdk_bdev_io *bdev_io, uint32_t *cdw0,
    7750             :                                    int *first_sct, int *first_sc, int *second_sct, int *second_sc)
    7751             : {
    7752           0 :         assert(first_sct != NULL);
    7753           0 :         assert(first_sc != NULL);
    7754           0 :         assert(second_sct != NULL);
    7755           0 :         assert(second_sc != NULL);
    7756           0 :         assert(cdw0 != NULL);
    7757             : 
    7758           0 :         if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
    7759           0 :                 if (bdev_io->internal.error.nvme.sct == SPDK_NVME_SCT_MEDIA_ERROR &&
    7760           0 :                     bdev_io->internal.error.nvme.sc == SPDK_NVME_SC_COMPARE_FAILURE) {
    7761           0 :                         *first_sct = bdev_io->internal.error.nvme.sct;
    7762           0 :                         *first_sc = bdev_io->internal.error.nvme.sc;
    7763           0 :                         *second_sct = SPDK_NVME_SCT_GENERIC;
    7764           0 :                         *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7765           0 :                 } else {
    7766           0 :                         *first_sct = SPDK_NVME_SCT_GENERIC;
    7767           0 :                         *first_sc = SPDK_NVME_SC_SUCCESS;
    7768           0 :                         *second_sct = bdev_io->internal.error.nvme.sct;
    7769           0 :                         *second_sc = bdev_io->internal.error.nvme.sc;
    7770             :                 }
    7771           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_ABORTED) {
    7772           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7773           0 :                 *first_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7774           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7775           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
    7776           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_SUCCESS) {
    7777           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7778           0 :                 *first_sc = SPDK_NVME_SC_SUCCESS;
    7779           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7780           0 :                 *second_sc = SPDK_NVME_SC_SUCCESS;
    7781           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_FIRST_FUSED_FAILED) {
    7782           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7783           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7784           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7785           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7786           0 :         } else if (bdev_io->internal.status == SPDK_BDEV_IO_STATUS_MISCOMPARE) {
    7787           0 :                 *first_sct = SPDK_NVME_SCT_MEDIA_ERROR;
    7788           0 :                 *first_sc = SPDK_NVME_SC_COMPARE_FAILURE;
    7789           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7790           0 :                 *second_sc = SPDK_NVME_SC_ABORTED_FAILED_FUSED;
    7791           0 :         } else {
    7792           0 :                 *first_sct = SPDK_NVME_SCT_GENERIC;
    7793           0 :                 *first_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7794           0 :                 *second_sct = SPDK_NVME_SCT_GENERIC;
    7795           0 :                 *second_sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
    7796             :         }
    7797             : 
    7798           0 :         *cdw0 = bdev_io->internal.error.nvme.cdw0;
    7799           0 : }
    7800             : 
    7801             : void
    7802           0 : spdk_bdev_io_complete_base_io_status(struct spdk_bdev_io *bdev_io,
    7803             :                                      const struct spdk_bdev_io *base_io)
    7804             : {
    7805           0 :         switch (base_io->internal.status) {
    7806             :         case SPDK_BDEV_IO_STATUS_NVME_ERROR:
    7807           0 :                 spdk_bdev_io_complete_nvme_status(bdev_io,
    7808           0 :                                                   base_io->internal.error.nvme.cdw0,
    7809           0 :                                                   base_io->internal.error.nvme.sct,
    7810           0 :                                                   base_io->internal.error.nvme.sc);
    7811           0 :                 break;
    7812             :         case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
    7813           0 :                 spdk_bdev_io_complete_scsi_status(bdev_io,
    7814           0 :                                                   base_io->internal.error.scsi.sc,
    7815           0 :                                                   base_io->internal.error.scsi.sk,
    7816           0 :                                                   base_io->internal.error.scsi.asc,
    7817           0 :                                                   base_io->internal.error.scsi.ascq);
    7818           0 :                 break;
    7819             :         case SPDK_BDEV_IO_STATUS_AIO_ERROR:
    7820           0 :                 spdk_bdev_io_complete_aio_status(bdev_io, base_io->internal.error.aio_result);
    7821           0 :                 break;
    7822             :         default:
    7823           0 :                 spdk_bdev_io_complete(bdev_io, base_io->internal.status);
    7824           0 :                 break;
    7825             :         }
    7826           0 : }
    7827             : 
    7828             : struct spdk_thread *
    7829         660 : spdk_bdev_io_get_thread(struct spdk_bdev_io *bdev_io)
    7830             : {
    7831         660 :         return spdk_io_channel_get_thread(bdev_io->internal.ch->channel);
    7832             : }
    7833             : 
    7834             : struct spdk_io_channel *
    7835          70 : spdk_bdev_io_get_io_channel(struct spdk_bdev_io *bdev_io)
    7836             : {
    7837          70 :         return bdev_io->internal.ch->channel;
    7838             : }
    7839             : 
    7840             : static int
    7841         127 : bdev_register(struct spdk_bdev *bdev)
    7842             : {
    7843             :         char *bdev_name;
    7844             :         char uuid[SPDK_UUID_STRING_LEN];
    7845             :         struct spdk_iobuf_opts iobuf_opts;
    7846             :         int ret;
    7847             : 
    7848         127 :         assert(bdev->module != NULL);
    7849             : 
    7850         127 :         if (!bdev->name) {
    7851           0 :                 SPDK_ERRLOG("Bdev name is NULL\n");
    7852           0 :                 return -EINVAL;
    7853             :         }
    7854             : 
    7855         127 :         if (!strlen(bdev->name)) {
    7856           0 :                 SPDK_ERRLOG("Bdev name must not be an empty string\n");
    7857           0 :                 return -EINVAL;
    7858             :         }
    7859             : 
    7860             :         /* Users often register their own I/O devices using the bdev name. In
    7861             :          * order to avoid conflicts, prepend bdev_. */
    7862         127 :         bdev_name = spdk_sprintf_alloc("bdev_%s", bdev->name);
    7863         127 :         if (!bdev_name) {
    7864           0 :                 SPDK_ERRLOG("Unable to allocate memory for internal bdev name.\n");
    7865           0 :                 return -ENOMEM;
    7866             :         }
    7867             : 
    7868         127 :         bdev->internal.stat = bdev_alloc_io_stat(true);
    7869         127 :         if (!bdev->internal.stat) {
    7870           0 :                 SPDK_ERRLOG("Unable to allocate I/O statistics structure.\n");
    7871           0 :                 free(bdev_name);
    7872           0 :                 return -ENOMEM;
    7873             :         }
    7874             : 
    7875         127 :         bdev->internal.status = SPDK_BDEV_STATUS_READY;
    7876         127 :         bdev->internal.measured_queue_depth = UINT64_MAX;
    7877         127 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    7878         127 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    7879         127 :         bdev->internal.qd_poller = NULL;
    7880         127 :         bdev->internal.qos = NULL;
    7881             : 
    7882         127 :         TAILQ_INIT(&bdev->internal.open_descs);
    7883         127 :         TAILQ_INIT(&bdev->internal.locked_ranges);
    7884         127 :         TAILQ_INIT(&bdev->internal.pending_locked_ranges);
    7885         127 :         TAILQ_INIT(&bdev->aliases);
    7886             : 
    7887             :         /* UUID may be specified by the user or defined by bdev itself.
    7888             :          * Otherwise it will be generated here, so this field will never be empty. */
    7889         127 :         if (spdk_uuid_is_null(&bdev->uuid)) {
    7890          42 :                 spdk_uuid_generate(&bdev->uuid);
    7891          42 :         }
    7892             : 
    7893             :         /* Add the UUID alias only if it's different than the name */
    7894         127 :         spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    7895         127 :         if (strcmp(bdev->name, uuid) != 0) {
    7896         126 :                 ret = spdk_bdev_alias_add(bdev, uuid);
    7897         126 :                 if (ret != 0) {
    7898           2 :                         SPDK_ERRLOG("Unable to add uuid:%s alias for bdev %s\n", uuid, bdev->name);
    7899           2 :                         bdev_free_io_stat(bdev->internal.stat);
    7900           2 :                         free(bdev_name);
    7901           2 :                         return ret;
    7902             :                 }
    7903         124 :         }
    7904             : 
    7905         125 :         spdk_iobuf_get_opts(&iobuf_opts, sizeof(iobuf_opts));
    7906         125 :         if (spdk_bdev_get_buf_align(bdev) > 1) {
    7907           0 :                 bdev->max_rw_size = spdk_min(bdev->max_rw_size ? bdev->max_rw_size : UINT32_MAX,
    7908             :                                              iobuf_opts.large_bufsize / bdev->blocklen);
    7909           0 :         }
    7910             : 
    7911             :         /* If the user didn't specify a write unit size, set it to one. */
    7912         125 :         if (bdev->write_unit_size == 0) {
    7913         121 :                 bdev->write_unit_size = 1;
    7914         121 :         }
    7915             : 
    7916             :         /* Set ACWU value to the write unit size if bdev module did not set it (does not support it natively) */
    7917         125 :         if (bdev->acwu == 0) {
    7918         121 :                 bdev->acwu = bdev->write_unit_size;
    7919         121 :         }
    7920             : 
    7921         125 :         if (bdev->phys_blocklen == 0) {
    7922         121 :                 bdev->phys_blocklen = spdk_bdev_get_data_block_size(bdev);
    7923         121 :         }
    7924             : 
    7925         125 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY)) {
    7926           0 :                 bdev->max_copy = bdev_get_max_write(bdev, iobuf_opts.large_bufsize);
    7927           0 :         }
    7928             : 
    7929         125 :         if (!bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)) {
    7930           0 :                 bdev->max_write_zeroes = bdev_get_max_write(bdev, ZERO_BUFFER_SIZE);
    7931           0 :         }
    7932             : 
    7933         125 :         bdev->internal.reset_in_progress = NULL;
    7934         125 :         bdev->internal.qd_poll_in_progress = false;
    7935         125 :         bdev->internal.period = 0;
    7936         125 :         bdev->internal.new_period = 0;
    7937         125 :         bdev->internal.trace_id = spdk_trace_register_owner(OWNER_TYPE_BDEV, bdev_name);
    7938             : 
    7939             :         /*
    7940             :          * Initialize spinlock before registering IO device because spinlock is used in
    7941             :          * bdev_channel_create
    7942             :          */
    7943         125 :         spdk_spin_init(&bdev->internal.spinlock);
    7944             : 
    7945         250 :         spdk_io_device_register(__bdev_to_io_dev(bdev),
    7946             :                                 bdev_channel_create, bdev_channel_destroy,
    7947             :                                 sizeof(struct spdk_bdev_channel),
    7948         125 :                                 bdev_name);
    7949             : 
    7950             :         /*
    7951             :          * Register bdev name only after the bdev object is ready.
    7952             :          * After bdev_name_add returns, it is possible for other threads to start using the bdev,
    7953             :          * create IO channels...
    7954             :          */
    7955         125 :         ret = bdev_name_add(&bdev->internal.bdev_name, bdev, bdev->name);
    7956         125 :         if (ret != 0) {
    7957           0 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), NULL);
    7958           0 :                 bdev_free_io_stat(bdev->internal.stat);
    7959           0 :                 spdk_spin_destroy(&bdev->internal.spinlock);
    7960           0 :                 free(bdev_name);
    7961           0 :                 return ret;
    7962             :         }
    7963             : 
    7964         125 :         free(bdev_name);
    7965             : 
    7966         125 :         SPDK_DEBUGLOG(bdev, "Inserting bdev %s into list\n", bdev->name);
    7967         125 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.bdevs, bdev, internal.link);
    7968             : 
    7969         125 :         return 0;
    7970         127 : }
    7971             : 
    7972             : static void
    7973         126 : bdev_destroy_cb(void *io_device)
    7974             : {
    7975             :         int                     rc;
    7976             :         struct spdk_bdev        *bdev;
    7977             :         spdk_bdev_unregister_cb cb_fn;
    7978             :         void                    *cb_arg;
    7979             : 
    7980         126 :         bdev = __bdev_from_io_dev(io_device);
    7981             : 
    7982         126 :         if (bdev->internal.unregister_td != spdk_get_thread()) {
    7983           1 :                 spdk_thread_send_msg(bdev->internal.unregister_td, bdev_destroy_cb, io_device);
    7984           1 :                 return;
    7985             :         }
    7986             : 
    7987         125 :         cb_fn = bdev->internal.unregister_cb;
    7988         125 :         cb_arg = bdev->internal.unregister_ctx;
    7989             : 
    7990         125 :         spdk_spin_destroy(&bdev->internal.spinlock);
    7991         125 :         free(bdev->internal.qos);
    7992         125 :         bdev_free_io_stat(bdev->internal.stat);
    7993         125 :         spdk_trace_unregister_owner(bdev->internal.trace_id);
    7994             : 
    7995         125 :         rc = bdev->fn_table->destruct(bdev->ctxt);
    7996         125 :         if (rc < 0) {
    7997           0 :                 SPDK_ERRLOG("destruct failed\n");
    7998           0 :         }
    7999         125 :         if (rc <= 0 && cb_fn != NULL) {
    8000          10 :                 cb_fn(cb_arg, rc);
    8001          10 :         }
    8002         126 : }
    8003             : 
    8004             : void
    8005           2 : spdk_bdev_destruct_done(struct spdk_bdev *bdev, int bdeverrno)
    8006             : {
    8007           2 :         if (bdev->internal.unregister_cb != NULL) {
    8008           0 :                 bdev->internal.unregister_cb(bdev->internal.unregister_ctx, bdeverrno);
    8009           0 :         }
    8010           2 : }
    8011             : 
    8012             : static void
    8013          19 : _remove_notify(void *arg)
    8014             : {
    8015          19 :         struct spdk_bdev_desc *desc = arg;
    8016             : 
    8017          19 :         _event_notify(desc, SPDK_BDEV_EVENT_REMOVE);
    8018          19 : }
    8019             : 
    8020             : /* returns: 0 - bdev removed and ready to be destructed.
    8021             :  *          -EBUSY - bdev can't be destructed yet.  */
    8022             : static int
    8023         140 : bdev_unregister_unsafe(struct spdk_bdev *bdev)
    8024             : {
    8025             :         struct spdk_bdev_desc   *desc, *tmp;
    8026         140 :         int                     rc = 0;
    8027             :         char                    uuid[SPDK_UUID_STRING_LEN];
    8028             : 
    8029         140 :         assert(spdk_spin_held(&g_bdev_mgr.spinlock));
    8030         140 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8031             : 
    8032             :         /* Notify each descriptor about hotremoval */
    8033         159 :         TAILQ_FOREACH_SAFE(desc, &bdev->internal.open_descs, link, tmp) {
    8034          19 :                 rc = -EBUSY;
    8035             :                 /*
    8036             :                  * Defer invocation of the event_cb to a separate message that will
    8037             :                  *  run later on its thread.  This ensures this context unwinds and
    8038             :                  *  we don't recursively unregister this bdev again if the event_cb
    8039             :                  *  immediately closes its descriptor.
    8040             :                  */
    8041          19 :                 event_notify(desc, _remove_notify);
    8042          19 :         }
    8043             : 
    8044             :         /* If there are no descriptors, proceed removing the bdev */
    8045         140 :         if (rc == 0) {
    8046         125 :                 TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, internal.link);
    8047         125 :                 SPDK_DEBUGLOG(bdev, "Removing bdev %s from list done\n", bdev->name);
    8048             : 
    8049             :                 /* Delete the name and the UUID alias */
    8050         125 :                 spdk_uuid_fmt_lower(uuid, sizeof(uuid), &bdev->uuid);
    8051         125 :                 bdev_name_del_unsafe(&bdev->internal.bdev_name);
    8052         125 :                 bdev_alias_del(bdev, uuid, bdev_name_del_unsafe);
    8053             : 
    8054         125 :                 spdk_notify_send("bdev_unregister", spdk_bdev_get_name(bdev));
    8055             : 
    8056         125 :                 if (bdev->internal.reset_in_progress != NULL) {
    8057             :                         /* If reset is in progress, let the completion callback for reset
    8058             :                          * unregister the bdev.
    8059             :                          */
    8060           1 :                         rc = -EBUSY;
    8061           1 :                 }
    8062         125 :         }
    8063             : 
    8064         140 :         return rc;
    8065             : }
    8066             : 
    8067             : static void
    8068           4 : bdev_unregister_abort_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    8069             :                               struct spdk_io_channel *io_ch, void *_ctx)
    8070             : {
    8071           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
    8072             : 
    8073           4 :         bdev_channel_abort_queued_ios(bdev_ch);
    8074           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    8075           4 : }
    8076             : 
    8077             : static void
    8078         125 : bdev_unregister(struct spdk_bdev *bdev, void *_ctx, int status)
    8079             : {
    8080             :         int rc;
    8081             : 
    8082         125 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8083         125 :         spdk_spin_lock(&bdev->internal.spinlock);
    8084             :         /*
    8085             :          * Set the status to REMOVING after completing to abort channels. Otherwise,
    8086             :          * the last spdk_bdev_close() may call spdk_io_device_unregister() while
    8087             :          * spdk_bdev_for_each_channel() is executed and spdk_io_device_unregister()
    8088             :          * may fail.
    8089             :          */
    8090         125 :         bdev->internal.status = SPDK_BDEV_STATUS_REMOVING;
    8091         125 :         rc = bdev_unregister_unsafe(bdev);
    8092         125 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8093         125 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8094             : 
    8095         125 :         if (rc == 0) {
    8096         109 :                 spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8097         109 :         }
    8098         125 : }
    8099             : 
    8100             : void
    8101         132 : spdk_bdev_unregister(struct spdk_bdev *bdev, spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8102             : {
    8103             :         struct spdk_thread      *thread;
    8104             : 
    8105         132 :         SPDK_DEBUGLOG(bdev, "Removing bdev %s from list\n", bdev->name);
    8106             : 
    8107         132 :         thread = spdk_get_thread();
    8108         132 :         if (!thread) {
    8109             :                 /* The user called this from a non-SPDK thread. */
    8110           0 :                 if (cb_fn != NULL) {
    8111           0 :                         cb_fn(cb_arg, -ENOTSUP);
    8112           0 :                 }
    8113           0 :                 return;
    8114             :         }
    8115             : 
    8116         132 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8117         132 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8118         132 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8119           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8120           7 :                 if (cb_fn) {
    8121           0 :                         cb_fn(cb_arg, -EBUSY);
    8122           0 :                 }
    8123           7 :                 return;
    8124             :         }
    8125             : 
    8126         125 :         spdk_spin_lock(&bdev->internal.spinlock);
    8127         125 :         bdev->internal.status = SPDK_BDEV_STATUS_UNREGISTERING;
    8128         125 :         bdev->internal.unregister_cb = cb_fn;
    8129         125 :         bdev->internal.unregister_ctx = cb_arg;
    8130         125 :         bdev->internal.unregister_td = thread;
    8131         125 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8132         125 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8133             : 
    8134         125 :         spdk_bdev_set_qd_sampling_period(bdev, 0);
    8135             : 
    8136         125 :         spdk_bdev_for_each_channel(bdev, bdev_unregister_abort_channel, bdev,
    8137             :                                    bdev_unregister);
    8138         132 : }
    8139             : 
    8140             : int
    8141           4 : spdk_bdev_unregister_by_name(const char *bdev_name, struct spdk_bdev_module *module,
    8142             :                              spdk_bdev_unregister_cb cb_fn, void *cb_arg)
    8143             : {
    8144             :         struct spdk_bdev_desc *desc;
    8145             :         struct spdk_bdev *bdev;
    8146             :         int rc;
    8147             : 
    8148           4 :         rc = spdk_bdev_open_ext(bdev_name, false, _tmp_bdev_event_cb, NULL, &desc);
    8149           4 :         if (rc != 0) {
    8150           1 :                 SPDK_ERRLOG("Failed to open bdev with name: %s\n", bdev_name);
    8151           1 :                 return rc;
    8152             :         }
    8153             : 
    8154           3 :         bdev = spdk_bdev_desc_get_bdev(desc);
    8155             : 
    8156           3 :         if (bdev->module != module) {
    8157           1 :                 spdk_bdev_close(desc);
    8158           1 :                 SPDK_ERRLOG("Bdev %s was not registered by the specified module.\n",
    8159             :                             bdev_name);
    8160           1 :                 return -ENODEV;
    8161             :         }
    8162             : 
    8163           2 :         spdk_bdev_unregister(bdev, cb_fn, cb_arg);
    8164             : 
    8165           2 :         spdk_bdev_close(desc);
    8166             : 
    8167           2 :         return 0;
    8168           4 : }
    8169             : 
    8170             : static int
    8171         258 : bdev_start_qos(struct spdk_bdev *bdev)
    8172             : {
    8173             :         struct set_qos_limit_ctx *ctx;
    8174             : 
    8175             :         /* Enable QoS */
    8176         258 :         if (bdev->internal.qos && bdev->internal.qos->thread == NULL) {
    8177           2 :                 ctx = calloc(1, sizeof(*ctx));
    8178           2 :                 if (ctx == NULL) {
    8179           0 :                         SPDK_ERRLOG("Failed to allocate memory for QoS context\n");
    8180           0 :                         return -ENOMEM;
    8181             :                 }
    8182           2 :                 ctx->bdev = bdev;
    8183           2 :                 spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx, bdev_enable_qos_done);
    8184           2 :         }
    8185             : 
    8186         258 :         return 0;
    8187         258 : }
    8188             : 
    8189             : static void
    8190          24 : log_already_claimed(enum spdk_log_level level, const int line, const char *func, const char *detail,
    8191             :                     struct spdk_bdev *bdev)
    8192             : {
    8193             :         enum spdk_bdev_claim_type type;
    8194             :         const char *typename, *modname;
    8195             :         extern struct spdk_log_flag SPDK_LOG_bdev;
    8196             : 
    8197          24 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8198             : 
    8199          24 :         if (level >= SPDK_LOG_INFO && !SPDK_LOG_bdev.enabled) {
    8200           0 :                 return;
    8201             :         }
    8202             : 
    8203          24 :         type = bdev->internal.claim_type;
    8204          24 :         typename = spdk_bdev_claim_get_name(type);
    8205             : 
    8206          24 :         if (type == SPDK_BDEV_CLAIM_EXCL_WRITE) {
    8207           6 :                 modname = bdev->internal.claim.v1.module->name;
    8208          12 :                 spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8209           6 :                          bdev->name, detail, typename, modname);
    8210           6 :                 return;
    8211             :         }
    8212             : 
    8213          18 :         if (claim_type_is_v2(type)) {
    8214             :                 struct spdk_bdev_module_claim *claim;
    8215             : 
    8216          36 :                 TAILQ_FOREACH(claim, &bdev->internal.claim.v2.claims, link) {
    8217          18 :                         modname = claim->module->name;
    8218          36 :                         spdk_log(level, __FILE__, line, func, "bdev %s %s: type %s by module %s\n",
    8219          18 :                                  bdev->name, detail, typename, modname);
    8220          18 :                 }
    8221          18 :                 return;
    8222             :         }
    8223             : 
    8224           0 :         assert(false);
    8225          24 : }
    8226             : 
    8227             : static int
    8228         267 : bdev_open(struct spdk_bdev *bdev, bool write, struct spdk_bdev_desc *desc)
    8229             : {
    8230             :         struct spdk_thread *thread;
    8231         267 :         int rc = 0;
    8232             : 
    8233         267 :         thread = spdk_get_thread();
    8234         267 :         if (!thread) {
    8235           0 :                 SPDK_ERRLOG("Cannot open bdev from non-SPDK thread.\n");
    8236           0 :                 return -ENOTSUP;
    8237             :         }
    8238             : 
    8239         267 :         SPDK_DEBUGLOG(bdev, "Opening descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8240             :                       spdk_get_thread());
    8241             : 
    8242         267 :         desc->bdev = bdev;
    8243         267 :         desc->thread = thread;
    8244         267 :         desc->write = write;
    8245             : 
    8246         267 :         spdk_spin_lock(&bdev->internal.spinlock);
    8247         267 :         if (bdev->internal.status == SPDK_BDEV_STATUS_UNREGISTERING ||
    8248         267 :             bdev->internal.status == SPDK_BDEV_STATUS_REMOVING) {
    8249           3 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8250           3 :                 return -ENODEV;
    8251             :         }
    8252             : 
    8253         264 :         if (write && bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8254           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8255           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8256           6 :                 return -EPERM;
    8257             :         }
    8258             : 
    8259         258 :         rc = bdev_start_qos(bdev);
    8260         258 :         if (rc != 0) {
    8261           0 :                 SPDK_ERRLOG("Failed to start QoS on bdev %s\n", bdev->name);
    8262           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8263           0 :                 return rc;
    8264             :         }
    8265             : 
    8266         258 :         TAILQ_INSERT_TAIL(&bdev->internal.open_descs, desc, link);
    8267             : 
    8268         258 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8269             : 
    8270         258 :         return 0;
    8271         267 : }
    8272             : 
    8273             : static void
    8274         268 : bdev_open_opts_get_defaults(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8275             : {
    8276         268 :         if (!opts) {
    8277           0 :                 SPDK_ERRLOG("opts should not be NULL.\n");
    8278           0 :                 return;
    8279             :         }
    8280             : 
    8281         268 :         if (!opts_size) {
    8282           0 :                 SPDK_ERRLOG("opts_size should not be zero.\n");
    8283           0 :                 return;
    8284             :         }
    8285             : 
    8286         268 :         memset(opts, 0, opts_size);
    8287         268 :         opts->size = opts_size;
    8288             : 
    8289             : #define FIELD_OK(field) \
    8290             :         offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size
    8291             : 
    8292             : #define SET_FIELD(field, value) \
    8293             :         if (FIELD_OK(field)) { \
    8294             :                 opts->field = value; \
    8295             :         } \
    8296             : 
    8297         268 :         SET_FIELD(hide_metadata, false);
    8298             : 
    8299             : #undef FIELD_OK
    8300             : #undef SET_FIELD
    8301         268 : }
    8302             : 
    8303             : static void
    8304           2 : bdev_open_opts_copy(struct spdk_bdev_open_opts *opts,
    8305             :                     const struct spdk_bdev_open_opts *opts_src, size_t opts_size)
    8306             : {
    8307           2 :         assert(opts);
    8308           2 :         assert(opts_src);
    8309             : 
    8310             : #define SET_FIELD(field) \
    8311             :         if (offsetof(struct spdk_bdev_open_opts, field) + sizeof(opts->field) <= opts_size) { \
    8312             :                 opts->field = opts_src->field; \
    8313             :         } \
    8314             : 
    8315           2 :         SET_FIELD(hide_metadata);
    8316             : 
    8317           2 :         opts->size = opts_src->size;
    8318             : 
    8319             :         /* We should not remove this statement, but need to update the assert statement
    8320             :          * if we add a new field, and also add a corresponding SET_FIELD statement.
    8321             :          */
    8322             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_opts) == 16, "Incorrect size");
    8323             : 
    8324             : #undef SET_FIELD
    8325           2 : }
    8326             : 
    8327             : void
    8328           1 : spdk_bdev_open_opts_init(struct spdk_bdev_open_opts *opts, size_t opts_size)
    8329             : {
    8330             :         struct spdk_bdev_open_opts opts_local;
    8331             : 
    8332           1 :         bdev_open_opts_get_defaults(&opts_local, sizeof(opts_local));
    8333           1 :         bdev_open_opts_copy(opts, &opts_local, opts_size);
    8334           1 : }
    8335             : 
    8336             : static int
    8337         267 : bdev_desc_alloc(struct spdk_bdev *bdev, spdk_bdev_event_cb_t event_cb, void *event_ctx,
    8338             :                 struct spdk_bdev_open_opts *user_opts, struct spdk_bdev_desc **_desc)
    8339             : {
    8340             :         struct spdk_bdev_desc *desc;
    8341             :         struct spdk_bdev_open_opts opts;
    8342             :         unsigned int i;
    8343             : 
    8344         267 :         bdev_open_opts_get_defaults(&opts, sizeof(opts));
    8345         267 :         if (user_opts != NULL) {
    8346           1 :                 bdev_open_opts_copy(&opts, user_opts, user_opts->size);
    8347           1 :         }
    8348             : 
    8349         267 :         desc = calloc(1, sizeof(*desc));
    8350         267 :         if (desc == NULL) {
    8351           0 :                 SPDK_ERRLOG("Failed to allocate memory for bdev descriptor\n");
    8352           0 :                 return -ENOMEM;
    8353             :         }
    8354             : 
    8355         267 :         desc->opts = opts;
    8356             : 
    8357         267 :         TAILQ_INIT(&desc->pending_media_events);
    8358         267 :         TAILQ_INIT(&desc->free_media_events);
    8359             : 
    8360         267 :         desc->memory_domains_supported = spdk_bdev_get_memory_domains(bdev, NULL, 0) > 0;
    8361         267 :         desc->callback.event_fn = event_cb;
    8362         267 :         desc->callback.ctx = event_ctx;
    8363         267 :         spdk_spin_init(&desc->spinlock);
    8364             : 
    8365         267 :         if (desc->opts.hide_metadata) {
    8366           1 :                 if (spdk_bdev_is_md_separate(bdev)) {
    8367           0 :                         SPDK_ERRLOG("hide_metadata option is not supported with separate metadata.\n");
    8368           0 :                         bdev_desc_free(desc);
    8369           0 :                         return -EINVAL;
    8370             :                 }
    8371           1 :         }
    8372             : 
    8373         267 :         if (bdev->media_events) {
    8374           0 :                 desc->media_events_buffer = calloc(MEDIA_EVENT_POOL_SIZE,
    8375             :                                                    sizeof(*desc->media_events_buffer));
    8376           0 :                 if (desc->media_events_buffer == NULL) {
    8377           0 :                         SPDK_ERRLOG("Failed to initialize media event pool\n");
    8378           0 :                         bdev_desc_free(desc);
    8379           0 :                         return -ENOMEM;
    8380             :                 }
    8381             : 
    8382           0 :                 for (i = 0; i < MEDIA_EVENT_POOL_SIZE; ++i) {
    8383           0 :                         TAILQ_INSERT_TAIL(&desc->free_media_events,
    8384             :                                           &desc->media_events_buffer[i], tailq);
    8385           0 :                 }
    8386           0 :         }
    8387             : 
    8388         267 :         if (bdev->fn_table->accel_sequence_supported != NULL) {
    8389           0 :                 for (i = 0; i < SPDK_BDEV_NUM_IO_TYPES; ++i) {
    8390           0 :                         desc->accel_sequence_supported[i] =
    8391           0 :                                 bdev->fn_table->accel_sequence_supported(bdev->ctxt,
    8392           0 :                                                 (enum spdk_bdev_io_type)i);
    8393           0 :                 }
    8394           0 :         }
    8395             : 
    8396         267 :         *_desc = desc;
    8397             : 
    8398         267 :         return 0;
    8399         267 : }
    8400             : 
    8401             : static int
    8402         130 : bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8403             :               void *event_ctx, struct spdk_bdev_open_opts *opts,
    8404             :               struct spdk_bdev_desc **_desc)
    8405             : {
    8406             :         struct spdk_bdev_desc *desc;
    8407             :         struct spdk_bdev *bdev;
    8408             :         int rc;
    8409             : 
    8410         130 :         bdev = bdev_get_by_name(bdev_name);
    8411             : 
    8412         130 :         if (bdev == NULL) {
    8413           1 :                 SPDK_NOTICELOG("Currently unable to find bdev with name: %s\n", bdev_name);
    8414           1 :                 return -ENODEV;
    8415             :         }
    8416             : 
    8417         129 :         rc = bdev_desc_alloc(bdev, event_cb, event_ctx, opts, &desc);
    8418         129 :         if (rc != 0) {
    8419           0 :                 return rc;
    8420             :         }
    8421             : 
    8422         129 :         rc = bdev_open(bdev, write, desc);
    8423         129 :         if (rc != 0) {
    8424           7 :                 bdev_desc_free(desc);
    8425           7 :                 desc = NULL;
    8426           7 :         }
    8427             : 
    8428         129 :         *_desc = desc;
    8429             : 
    8430         129 :         return rc;
    8431         130 : }
    8432             : 
    8433             : int
    8434         132 : spdk_bdev_open_ext_v2(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8435             :                       void *event_ctx, struct spdk_bdev_open_opts *opts,
    8436             :                       struct spdk_bdev_desc **_desc)
    8437             : {
    8438             :         int rc;
    8439             : 
    8440         132 :         if (event_cb == NULL) {
    8441           2 :                 SPDK_ERRLOG("Missing event callback function\n");
    8442           2 :                 return -EINVAL;
    8443             :         }
    8444             : 
    8445         130 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8446         130 :         rc = bdev_open_ext(bdev_name, write, event_cb, event_ctx, opts, _desc);
    8447         130 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8448             : 
    8449         130 :         return rc;
    8450         132 : }
    8451             : 
    8452             : int
    8453         130 : spdk_bdev_open_ext(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8454             :                    void *event_ctx, struct spdk_bdev_desc **_desc)
    8455             : {
    8456         130 :         return spdk_bdev_open_ext_v2(bdev_name, write, event_cb, event_ctx, NULL, _desc);
    8457             : }
    8458             : 
    8459             : struct spdk_bdev_open_async_ctx {
    8460             :         char                                    *bdev_name;
    8461             :         spdk_bdev_event_cb_t                    event_cb;
    8462             :         void                                    *event_ctx;
    8463             :         bool                                    write;
    8464             :         int                                     rc;
    8465             :         spdk_bdev_open_async_cb_t               cb_fn;
    8466             :         void                                    *cb_arg;
    8467             :         struct spdk_bdev_desc                   *desc;
    8468             :         struct spdk_bdev_open_async_opts        opts;
    8469             :         uint64_t                                start_ticks;
    8470             :         struct spdk_thread                      *orig_thread;
    8471             :         struct spdk_poller                      *poller;
    8472             :         TAILQ_ENTRY(spdk_bdev_open_async_ctx)   tailq;
    8473             : };
    8474             : 
    8475             : static void
    8476           0 : bdev_open_async_done(void *arg)
    8477             : {
    8478           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8479             : 
    8480           0 :         ctx->cb_fn(ctx->desc, ctx->rc, ctx->cb_arg);
    8481             : 
    8482           0 :         free(ctx->bdev_name);
    8483           0 :         free(ctx);
    8484           0 : }
    8485             : 
    8486             : static void
    8487           0 : bdev_open_async_cancel(void *arg)
    8488             : {
    8489           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8490             : 
    8491           0 :         assert(ctx->rc == -ESHUTDOWN);
    8492             : 
    8493           0 :         spdk_poller_unregister(&ctx->poller);
    8494             : 
    8495           0 :         bdev_open_async_done(ctx);
    8496           0 : }
    8497             : 
    8498             : /* This is called when the bdev library finishes at shutdown. */
    8499             : static void
    8500          65 : bdev_open_async_fini(void)
    8501             : {
    8502             :         struct spdk_bdev_open_async_ctx *ctx, *tmp_ctx;
    8503             : 
    8504          65 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8505          65 :         TAILQ_FOREACH_SAFE(ctx, &g_bdev_mgr.async_bdev_opens, tailq, tmp_ctx) {
    8506           0 :                 TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8507             :                 /*
    8508             :                  * We have to move to ctx->orig_thread to unregister ctx->poller.
    8509             :                  * However, there is a chance that ctx->poller is executed before
    8510             :                  * message is executed, which could result in bdev_open_async_done()
    8511             :                  * being called twice. To avoid such race condition, set ctx->rc to
    8512             :                  * -ESHUTDOWN.
    8513             :                  */
    8514           0 :                 ctx->rc = -ESHUTDOWN;
    8515           0 :                 spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_cancel, ctx);
    8516           0 :         }
    8517          65 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8518          65 : }
    8519             : 
    8520             : static int bdev_open_async(void *arg);
    8521             : 
    8522             : static void
    8523           0 : _bdev_open_async(struct spdk_bdev_open_async_ctx *ctx)
    8524             : {
    8525             :         uint64_t timeout_ticks;
    8526             : 
    8527           0 :         if (ctx->rc == -ESHUTDOWN) {
    8528             :                 /* This context is being canceled. Do nothing. */
    8529           0 :                 return;
    8530             :         }
    8531             : 
    8532           0 :         ctx->rc = bdev_open_ext(ctx->bdev_name, ctx->write, ctx->event_cb, ctx->event_ctx,
    8533           0 :                                 NULL, &ctx->desc);
    8534           0 :         if (ctx->rc == 0 || ctx->opts.timeout_ms == 0) {
    8535           0 :                 goto exit;
    8536             :         }
    8537             : 
    8538           0 :         timeout_ticks = ctx->start_ticks + ctx->opts.timeout_ms * spdk_get_ticks_hz() / 1000ull;
    8539           0 :         if (spdk_get_ticks() >= timeout_ticks) {
    8540           0 :                 SPDK_ERRLOG("Timed out while waiting for bdev '%s' to appear\n", ctx->bdev_name);
    8541           0 :                 ctx->rc = -ETIMEDOUT;
    8542           0 :                 goto exit;
    8543             :         }
    8544             : 
    8545           0 :         return;
    8546             : 
    8547             : exit:
    8548           0 :         spdk_poller_unregister(&ctx->poller);
    8549           0 :         TAILQ_REMOVE(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8550             : 
    8551             :         /* Completion callback is processed after stack unwinding. */
    8552           0 :         spdk_thread_send_msg(ctx->orig_thread, bdev_open_async_done, ctx);
    8553           0 : }
    8554             : 
    8555             : static int
    8556           0 : bdev_open_async(void *arg)
    8557             : {
    8558           0 :         struct spdk_bdev_open_async_ctx *ctx = arg;
    8559             : 
    8560           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8561             : 
    8562           0 :         _bdev_open_async(ctx);
    8563             : 
    8564           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8565             : 
    8566           0 :         return SPDK_POLLER_BUSY;
    8567             : }
    8568             : 
    8569             : static void
    8570           0 : bdev_open_async_opts_copy(struct spdk_bdev_open_async_opts *opts,
    8571             :                           struct spdk_bdev_open_async_opts *opts_src,
    8572             :                           size_t size)
    8573             : {
    8574           0 :         assert(opts);
    8575           0 :         assert(opts_src);
    8576             : 
    8577           0 :         opts->size = size;
    8578             : 
    8579             : #define SET_FIELD(field) \
    8580             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8581             :                 opts->field = opts_src->field; \
    8582             :         } \
    8583             : 
    8584           0 :         SET_FIELD(timeout_ms);
    8585             : 
    8586             :         /* Do not remove this statement, you should always update this statement when you adding a new field,
    8587             :          * and do not forget to add the SET_FIELD statement for your added field. */
    8588             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_open_async_opts) == 16, "Incorrect size");
    8589             : 
    8590             : #undef SET_FIELD
    8591           0 : }
    8592             : 
    8593             : static void
    8594           0 : bdev_open_async_opts_get_default(struct spdk_bdev_open_async_opts *opts, size_t size)
    8595             : {
    8596           0 :         assert(opts);
    8597             : 
    8598           0 :         opts->size = size;
    8599             : 
    8600             : #define SET_FIELD(field, value) \
    8601             :         if (offsetof(struct spdk_bdev_open_async_opts, field) + sizeof(opts->field) <= size) { \
    8602             :                 opts->field = value; \
    8603             :         } \
    8604             : 
    8605           0 :         SET_FIELD(timeout_ms, 0);
    8606             : 
    8607             : #undef SET_FIELD
    8608           0 : }
    8609             : 
    8610             : int
    8611           0 : spdk_bdev_open_async(const char *bdev_name, bool write, spdk_bdev_event_cb_t event_cb,
    8612             :                      void *event_ctx, struct spdk_bdev_open_async_opts *opts,
    8613             :                      spdk_bdev_open_async_cb_t open_cb, void *open_cb_arg)
    8614             : {
    8615             :         struct spdk_bdev_open_async_ctx *ctx;
    8616             : 
    8617           0 :         if (event_cb == NULL) {
    8618           0 :                 SPDK_ERRLOG("Missing event callback function\n");
    8619           0 :                 return -EINVAL;
    8620             :         }
    8621             : 
    8622           0 :         if (open_cb == NULL) {
    8623           0 :                 SPDK_ERRLOG("Missing open callback function\n");
    8624           0 :                 return -EINVAL;
    8625             :         }
    8626             : 
    8627           0 :         if (opts != NULL && opts->size == 0) {
    8628           0 :                 SPDK_ERRLOG("size in the options structure should not be zero\n");
    8629           0 :                 return -EINVAL;
    8630             :         }
    8631             : 
    8632           0 :         ctx = calloc(1, sizeof(*ctx));
    8633           0 :         if (ctx == NULL) {
    8634           0 :                 SPDK_ERRLOG("Failed to allocate open context\n");
    8635           0 :                 return -ENOMEM;
    8636             :         }
    8637             : 
    8638           0 :         ctx->bdev_name = strdup(bdev_name);
    8639           0 :         if (ctx->bdev_name == NULL) {
    8640           0 :                 SPDK_ERRLOG("Failed to duplicate bdev_name\n");
    8641           0 :                 free(ctx);
    8642           0 :                 return -ENOMEM;
    8643             :         }
    8644             : 
    8645           0 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_open_async, ctx, 100 * 1000);
    8646           0 :         if (ctx->poller == NULL) {
    8647           0 :                 SPDK_ERRLOG("Failed to register bdev_open_async poller\n");
    8648           0 :                 free(ctx->bdev_name);
    8649           0 :                 free(ctx);
    8650           0 :                 return -ENOMEM;
    8651             :         }
    8652             : 
    8653           0 :         ctx->cb_fn = open_cb;
    8654           0 :         ctx->cb_arg = open_cb_arg;
    8655           0 :         ctx->write = write;
    8656           0 :         ctx->event_cb = event_cb;
    8657           0 :         ctx->event_ctx = event_ctx;
    8658           0 :         ctx->orig_thread = spdk_get_thread();
    8659           0 :         ctx->start_ticks = spdk_get_ticks();
    8660             : 
    8661           0 :         bdev_open_async_opts_get_default(&ctx->opts, sizeof(ctx->opts));
    8662           0 :         if (opts != NULL) {
    8663           0 :                 bdev_open_async_opts_copy(&ctx->opts, opts, opts->size);
    8664           0 :         }
    8665             : 
    8666           0 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8667             : 
    8668           0 :         TAILQ_INSERT_TAIL(&g_bdev_mgr.async_bdev_opens, ctx, tailq);
    8669           0 :         _bdev_open_async(ctx);
    8670             : 
    8671           0 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8672             : 
    8673           0 :         return 0;
    8674           0 : }
    8675             : 
    8676             : static void
    8677         258 : bdev_close(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc)
    8678             : {
    8679             :         int rc;
    8680             : 
    8681         258 :         spdk_spin_lock(&bdev->internal.spinlock);
    8682         258 :         spdk_spin_lock(&desc->spinlock);
    8683             : 
    8684         258 :         TAILQ_REMOVE(&bdev->internal.open_descs, desc, link);
    8685             : 
    8686         258 :         desc->closed = true;
    8687             : 
    8688         258 :         if (desc->claim != NULL) {
    8689          16 :                 bdev_desc_release_claims(desc);
    8690          16 :         }
    8691             : 
    8692         258 :         if (0 == desc->refs) {
    8693         247 :                 spdk_spin_unlock(&desc->spinlock);
    8694         247 :                 bdev_desc_free(desc);
    8695         247 :         } else {
    8696          11 :                 spdk_spin_unlock(&desc->spinlock);
    8697             :         }
    8698             : 
    8699             :         /* If no more descriptors, kill QoS channel */
    8700         258 :         if (bdev->internal.qos && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8701           7 :                 SPDK_DEBUGLOG(bdev, "Closed last descriptor for bdev %s on thread %p. Stopping QoS.\n",
    8702             :                               bdev->name, spdk_get_thread());
    8703             : 
    8704           7 :                 if (bdev_qos_destroy(bdev)) {
    8705             :                         /* There isn't anything we can do to recover here. Just let the
    8706             :                          * old QoS poller keep running. The QoS handling won't change
    8707             :                          * cores when the user allocates a new channel, but it won't break. */
    8708           0 :                         SPDK_ERRLOG("Unable to shut down QoS poller. It will continue running on the current thread.\n");
    8709           0 :                 }
    8710           7 :         }
    8711             : 
    8712         258 :         if (bdev->internal.status == SPDK_BDEV_STATUS_REMOVING && TAILQ_EMPTY(&bdev->internal.open_descs)) {
    8713          15 :                 rc = bdev_unregister_unsafe(bdev);
    8714          15 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8715             : 
    8716          15 :                 if (rc == 0) {
    8717          15 :                         spdk_io_device_unregister(__bdev_to_io_dev(bdev), bdev_destroy_cb);
    8718          15 :                 }
    8719          15 :         } else {
    8720         243 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8721             :         }
    8722         258 : }
    8723             : 
    8724             : void
    8725         122 : spdk_bdev_close(struct spdk_bdev_desc *desc)
    8726             : {
    8727         122 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    8728             : 
    8729         122 :         SPDK_DEBUGLOG(bdev, "Closing descriptor %p for bdev %s on thread %p\n", desc, bdev->name,
    8730             :                       spdk_get_thread());
    8731             : 
    8732         122 :         assert(desc->thread == spdk_get_thread());
    8733             : 
    8734         122 :         spdk_poller_unregister(&desc->io_timeout_poller);
    8735             : 
    8736         122 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8737             : 
    8738         122 :         bdev_close(bdev, desc);
    8739             : 
    8740         122 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8741         122 : }
    8742             : 
    8743             : int32_t
    8744           3 : spdk_bdev_get_numa_id(struct spdk_bdev *bdev)
    8745             : {
    8746           3 :         if (bdev->numa.id_valid) {
    8747           2 :                 return bdev->numa.id;
    8748             :         } else {
    8749           1 :                 return SPDK_ENV_NUMA_ID_ANY;
    8750             :         }
    8751           3 : }
    8752             : 
    8753             : static void
    8754         125 : bdev_register_finished(void *arg)
    8755             : {
    8756         125 :         struct spdk_bdev_desc *desc = arg;
    8757         125 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
    8758             : 
    8759         125 :         spdk_notify_send("bdev_register", spdk_bdev_get_name(bdev));
    8760             : 
    8761         125 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    8762             : 
    8763         125 :         bdev_close(bdev, desc);
    8764             : 
    8765         125 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    8766         125 : }
    8767             : 
    8768             : int
    8769         128 : spdk_bdev_register(struct spdk_bdev *bdev)
    8770             : {
    8771             :         struct spdk_bdev_desc *desc;
    8772         128 :         struct spdk_thread *thread = spdk_get_thread();
    8773             :         int rc;
    8774             : 
    8775         128 :         if (spdk_unlikely(!spdk_thread_is_app_thread(NULL))) {
    8776           1 :                 SPDK_ERRLOG("Cannot register bdev %s on thread %p (%s)\n", bdev->name, thread,
    8777             :                             thread ? spdk_thread_get_name(thread) : "null");
    8778           1 :                 return -EINVAL;
    8779             :         }
    8780             : 
    8781         127 :         rc = bdev_register(bdev);
    8782         127 :         if (rc != 0) {
    8783           2 :                 return rc;
    8784             :         }
    8785             : 
    8786             :         /* A descriptor is opened to prevent bdev deletion during examination */
    8787         125 :         rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    8788         125 :         if (rc != 0) {
    8789           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8790           0 :                 return rc;
    8791             :         }
    8792             : 
    8793         125 :         rc = bdev_open(bdev, false, desc);
    8794         125 :         if (rc != 0) {
    8795           0 :                 bdev_desc_free(desc);
    8796           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8797           0 :                 return rc;
    8798             :         }
    8799             : 
    8800             :         /* Examine configuration before initializing I/O */
    8801         125 :         bdev_examine(bdev);
    8802             : 
    8803         125 :         rc = spdk_bdev_wait_for_examine(bdev_register_finished, desc);
    8804         125 :         if (rc != 0) {
    8805           0 :                 bdev_close(bdev, desc);
    8806           0 :                 spdk_bdev_unregister(bdev, NULL, NULL);
    8807           0 :         }
    8808             : 
    8809         125 :         return rc;
    8810         128 : }
    8811             : 
    8812             : int
    8813          26 : spdk_bdev_module_claim_bdev(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc,
    8814             :                             struct spdk_bdev_module *module)
    8815             : {
    8816          26 :         spdk_spin_lock(&bdev->internal.spinlock);
    8817             : 
    8818          26 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8819           6 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8820           6 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    8821           6 :                 return -EPERM;
    8822             :         }
    8823             : 
    8824          20 :         if (desc && !desc->write) {
    8825           5 :                 desc->write = true;
    8826           5 :         }
    8827             : 
    8828          20 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_EXCL_WRITE;
    8829          20 :         bdev->internal.claim.v1.module = module;
    8830             : 
    8831          20 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8832          20 :         return 0;
    8833          26 : }
    8834             : 
    8835             : void
    8836           8 : spdk_bdev_module_release_bdev(struct spdk_bdev *bdev)
    8837             : {
    8838           8 :         spdk_spin_lock(&bdev->internal.spinlock);
    8839             : 
    8840           8 :         assert(bdev->internal.claim.v1.module != NULL);
    8841           8 :         assert(bdev->internal.claim_type == SPDK_BDEV_CLAIM_EXCL_WRITE);
    8842           8 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    8843           8 :         bdev->internal.claim.v1.module = NULL;
    8844             : 
    8845           8 :         spdk_spin_unlock(&bdev->internal.spinlock);
    8846           8 : }
    8847             : 
    8848             : /*
    8849             :  * Start claims v2
    8850             :  */
    8851             : 
    8852             : const char *
    8853          24 : spdk_bdev_claim_get_name(enum spdk_bdev_claim_type type)
    8854             : {
    8855          24 :         switch (type) {
    8856             :         case SPDK_BDEV_CLAIM_NONE:
    8857           0 :                 return "not_claimed";
    8858             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    8859           6 :                 return "exclusive_write";
    8860             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8861           7 :                 return "read_many_write_one";
    8862             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    8863           5 :                 return "read_many_write_none";
    8864             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8865           6 :                 return "read_many_write_many";
    8866             :         default:
    8867           0 :                 break;
    8868             :         }
    8869           0 :         return "invalid_claim";
    8870          24 : }
    8871             : 
    8872             : static bool
    8873          96 : claim_type_is_v2(enum spdk_bdev_claim_type type)
    8874             : {
    8875          96 :         switch (type) {
    8876             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8877             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    8878             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8879          96 :                 return true;
    8880             :         default:
    8881           0 :                 break;
    8882             :         }
    8883           0 :         return false;
    8884          96 : }
    8885             : 
    8886             : /* Returns true if taking a claim with desc->write == false should make the descriptor writable. */
    8887             : static bool
    8888          13 : claim_type_promotes_to_write(enum spdk_bdev_claim_type type)
    8889             : {
    8890          13 :         switch (type) {
    8891             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    8892             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    8893           5 :                 return true;
    8894             :         default:
    8895           8 :                 break;
    8896             :         }
    8897           8 :         return false;
    8898          13 : }
    8899             : 
    8900             : void
    8901          44 : spdk_bdev_claim_opts_init(struct spdk_bdev_claim_opts *opts, size_t size)
    8902             : {
    8903          44 :         if (opts == NULL) {
    8904           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    8905           0 :                 assert(opts != NULL);
    8906           0 :                 return;
    8907             :         }
    8908          44 :         if (size == 0) {
    8909           0 :                 SPDK_ERRLOG("size should not be zero\n");
    8910           0 :                 assert(size != 0);
    8911           0 :                 return;
    8912             :         }
    8913             : 
    8914          44 :         memset(opts, 0, size);
    8915          44 :         opts->opts_size = size;
    8916             : 
    8917             : #define FIELD_OK(field) \
    8918             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(opts->field) <= size
    8919             : 
    8920             : #define SET_FIELD(field, value) \
    8921             :         if (FIELD_OK(field)) { \
    8922             :                 opts->field = value; \
    8923             :         } \
    8924             : 
    8925          44 :         SET_FIELD(shared_claim_key, 0);
    8926             : 
    8927             : #undef FIELD_OK
    8928             : #undef SET_FIELD
    8929          44 : }
    8930             : 
    8931             : static int
    8932          22 : claim_opts_copy(struct spdk_bdev_claim_opts *src, struct spdk_bdev_claim_opts *dst)
    8933             : {
    8934          22 :         if (src->opts_size == 0) {
    8935           0 :                 SPDK_ERRLOG("size should not be zero\n");
    8936           0 :                 return -1;
    8937             :         }
    8938             : 
    8939          22 :         memset(dst, 0, sizeof(*dst));
    8940          22 :         dst->opts_size = src->opts_size;
    8941             : 
    8942             : #define FIELD_OK(field) \
    8943             :         offsetof(struct spdk_bdev_claim_opts, field) + sizeof(src->field) <= src->opts_size
    8944             : 
    8945             : #define SET_FIELD(field) \
    8946             :         if (FIELD_OK(field)) { \
    8947             :                 dst->field = src->field; \
    8948             :         } \
    8949             : 
    8950          22 :         if (FIELD_OK(name)) {
    8951          22 :                 snprintf(dst->name, sizeof(dst->name), "%s", src->name);
    8952          22 :         }
    8953             : 
    8954          22 :         SET_FIELD(shared_claim_key);
    8955             : 
    8956             :         /* You should not remove this statement, but need to update the assert statement
    8957             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
    8958             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_claim_opts) == 48, "Incorrect size");
    8959             : 
    8960             : #undef FIELD_OK
    8961             : #undef SET_FIELD
    8962          22 :         return 0;
    8963          22 : }
    8964             : 
    8965             : /* Returns 0 if a read-write-once claim can be taken. */
    8966             : static int
    8967           9 : claim_verify_rwo(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    8968             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    8969             : {
    8970           9 :         struct spdk_bdev *bdev = desc->bdev;
    8971             :         struct spdk_bdev_desc *open_desc;
    8972             : 
    8973           9 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    8974           9 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE);
    8975             : 
    8976           9 :         if (opts->shared_claim_key != 0) {
    8977           1 :                 SPDK_ERRLOG("%s: key option not supported with read-write-once claims\n",
    8978             :                             bdev->name);
    8979           1 :                 return -EINVAL;
    8980             :         }
    8981           8 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) {
    8982           1 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    8983           1 :                 return -EPERM;
    8984             :         }
    8985           7 :         if (desc->claim != NULL) {
    8986           0 :                 SPDK_NOTICELOG("%s: descriptor already claimed bdev with module %s\n",
    8987             :                                bdev->name, desc->claim->module->name);
    8988           0 :                 return -EPERM;
    8989             :         }
    8990          14 :         TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    8991           9 :                 if (desc != open_desc && open_desc->write) {
    8992           2 :                         SPDK_NOTICELOG("%s: Cannot obtain read-write-once claim while "
    8993             :                                        "another descriptor is open for writing\n",
    8994             :                                        bdev->name);
    8995           2 :                         return -EPERM;
    8996             :                 }
    8997           7 :         }
    8998             : 
    8999           5 :         return 0;
    9000           9 : }
    9001             : 
    9002             : /* Returns 0 if a read-only-many claim can be taken. */
    9003             : static int
    9004          12 : claim_verify_rom(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9005             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9006             : {
    9007          12 :         struct spdk_bdev *bdev = desc->bdev;
    9008             :         struct spdk_bdev_desc *open_desc;
    9009             : 
    9010          12 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9011          12 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE);
    9012          12 :         assert(desc->claim == NULL);
    9013             : 
    9014          12 :         if (desc->write) {
    9015           3 :                 SPDK_ERRLOG("%s: Cannot obtain read-only-many claim with writable descriptor\n",
    9016             :                             bdev->name);
    9017           3 :                 return -EINVAL;
    9018             :         }
    9019           9 :         if (opts->shared_claim_key != 0) {
    9020           1 :                 SPDK_ERRLOG("%s: key option not supported with read-only-may claims\n", bdev->name);
    9021           1 :                 return -EINVAL;
    9022             :         }
    9023           8 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9024          15 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9025           9 :                         if (open_desc->write) {
    9026           0 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-only-many claim while "
    9027             :                                                "another descriptor is open for writing\n",
    9028             :                                                bdev->name);
    9029           0 :                                 return -EPERM;
    9030             :                         }
    9031           9 :                 }
    9032           6 :         }
    9033             : 
    9034           8 :         return 0;
    9035          12 : }
    9036             : 
    9037             : /* Returns 0 if a read-write-many claim can be taken. */
    9038             : static int
    9039           8 : claim_verify_rwm(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9040             :                  struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9041             : {
    9042           8 :         struct spdk_bdev *bdev = desc->bdev;
    9043             :         struct spdk_bdev_desc *open_desc;
    9044             : 
    9045           8 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9046           8 :         assert(type == SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED);
    9047           8 :         assert(desc->claim == NULL);
    9048             : 
    9049           8 :         if (opts->shared_claim_key == 0) {
    9050           2 :                 SPDK_ERRLOG("%s: shared_claim_key option required with read-write-may claims\n",
    9051             :                             bdev->name);
    9052           2 :                 return -EINVAL;
    9053             :         }
    9054           6 :         switch (bdev->internal.claim_type) {
    9055             :         case SPDK_BDEV_CLAIM_NONE:
    9056           7 :                 TAILQ_FOREACH(open_desc, &bdev->internal.open_descs, link) {
    9057           5 :                         if (open_desc == desc) {
    9058           3 :                                 continue;
    9059             :                         }
    9060           2 :                         if (open_desc->write) {
    9061           2 :                                 SPDK_NOTICELOG("%s: Cannot obtain read-write-many claim while "
    9062             :                                                "another descriptor is open for writing without a "
    9063             :                                                "claim\n", bdev->name);
    9064           2 :                                 return -EPERM;
    9065             :                         }
    9066           0 :                 }
    9067           2 :                 break;
    9068             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9069           2 :                 if (opts->shared_claim_key != bdev->internal.claim.v2.key) {
    9070           1 :                         LOG_ALREADY_CLAIMED_ERROR("already claimed with another key", bdev);
    9071           1 :                         return -EPERM;
    9072             :                 }
    9073           1 :                 break;
    9074             :         default:
    9075           0 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9076           0 :                 return -EBUSY;
    9077             :         }
    9078             : 
    9079           3 :         return 0;
    9080           8 : }
    9081             : 
    9082             : /* Updates desc and its bdev with a v2 claim. */
    9083             : static int
    9084          16 : claim_bdev(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9085             :            struct spdk_bdev_claim_opts *opts, struct spdk_bdev_module *module)
    9086             : {
    9087          16 :         struct spdk_bdev *bdev = desc->bdev;
    9088             :         struct spdk_bdev_module_claim *claim;
    9089             : 
    9090          16 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9091          16 :         assert(claim_type_is_v2(type));
    9092          16 :         assert(desc->claim == NULL);
    9093             : 
    9094          16 :         claim = calloc(1, sizeof(*desc->claim));
    9095          16 :         if (claim == NULL) {
    9096           0 :                 SPDK_ERRLOG("%s: out of memory while allocating claim\n", bdev->name);
    9097           0 :                 return -ENOMEM;
    9098             :         }
    9099          16 :         claim->module = module;
    9100          16 :         claim->desc = desc;
    9101             :         SPDK_STATIC_ASSERT(sizeof(claim->name) == sizeof(opts->name), "sizes must match");
    9102          16 :         memcpy(claim->name, opts->name, sizeof(claim->name));
    9103          16 :         desc->claim = claim;
    9104             : 
    9105          16 :         if (bdev->internal.claim_type == SPDK_BDEV_CLAIM_NONE) {
    9106          13 :                 bdev->internal.claim_type = type;
    9107          13 :                 TAILQ_INIT(&bdev->internal.claim.v2.claims);
    9108          13 :                 bdev->internal.claim.v2.key = opts->shared_claim_key;
    9109          13 :         }
    9110          16 :         assert(type == bdev->internal.claim_type);
    9111             : 
    9112          16 :         TAILQ_INSERT_TAIL(&bdev->internal.claim.v2.claims, claim, link);
    9113             : 
    9114          16 :         if (!desc->write && claim_type_promotes_to_write(type)) {
    9115           5 :                 desc->write = true;
    9116           5 :         }
    9117             : 
    9118          16 :         return 0;
    9119          16 : }
    9120             : 
    9121             : int
    9122          39 : spdk_bdev_module_claim_bdev_desc(struct spdk_bdev_desc *desc, enum spdk_bdev_claim_type type,
    9123             :                                  struct spdk_bdev_claim_opts *_opts,
    9124             :                                  struct spdk_bdev_module *module)
    9125             : {
    9126             :         struct spdk_bdev *bdev;
    9127             :         struct spdk_bdev_claim_opts opts;
    9128          39 :         int rc = 0;
    9129             : 
    9130          39 :         if (desc == NULL) {
    9131           0 :                 SPDK_ERRLOG("descriptor must not be NULL\n");
    9132           0 :                 return -EINVAL;
    9133             :         }
    9134             : 
    9135          39 :         bdev = desc->bdev;
    9136             : 
    9137          39 :         if (_opts == NULL) {
    9138          17 :                 spdk_bdev_claim_opts_init(&opts, sizeof(opts));
    9139          39 :         } else if (claim_opts_copy(_opts, &opts) != 0) {
    9140           0 :                 return -EINVAL;
    9141             :         }
    9142             : 
    9143          39 :         spdk_spin_lock(&bdev->internal.spinlock);
    9144             : 
    9145          39 :         if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE &&
    9146          15 :             bdev->internal.claim_type != type) {
    9147          10 :                 LOG_ALREADY_CLAIMED_ERROR("already claimed", bdev);
    9148          10 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9149          10 :                 return -EPERM;
    9150             :         }
    9151             : 
    9152          29 :         if (claim_type_is_v2(type) && desc->claim != NULL) {
    9153           0 :                 SPDK_ERRLOG("%s: descriptor already has %s claim with name '%s'\n",
    9154             :                             bdev->name, spdk_bdev_claim_get_name(type), desc->claim->name);
    9155           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9156           0 :                 return -EPERM;
    9157             :         }
    9158             : 
    9159          29 :         switch (type) {
    9160             :         case SPDK_BDEV_CLAIM_EXCL_WRITE:
    9161           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9162           0 :                 return spdk_bdev_module_claim_bdev(bdev, desc, module);
    9163             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_ONE:
    9164           9 :                 rc = claim_verify_rwo(desc, type, &opts, module);
    9165           9 :                 break;
    9166             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_NONE:
    9167          12 :                 rc = claim_verify_rom(desc, type, &opts, module);
    9168          12 :                 break;
    9169             :         case SPDK_BDEV_CLAIM_READ_MANY_WRITE_SHARED:
    9170           8 :                 rc = claim_verify_rwm(desc, type, &opts, module);
    9171           8 :                 break;
    9172             :         default:
    9173           0 :                 SPDK_ERRLOG("%s: claim type %d not supported\n", bdev->name, type);
    9174           0 :                 rc = -ENOTSUP;
    9175           0 :         }
    9176             : 
    9177          29 :         if (rc == 0) {
    9178          16 :                 rc = claim_bdev(desc, type, &opts, module);
    9179          16 :         }
    9180             : 
    9181          29 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9182          29 :         return rc;
    9183          39 : }
    9184             : 
    9185             : static void
    9186          13 : claim_reset(struct spdk_bdev *bdev)
    9187             : {
    9188          13 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9189          13 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9190          13 :         assert(TAILQ_EMPTY(&bdev->internal.claim.v2.claims));
    9191             : 
    9192          13 :         memset(&bdev->internal.claim, 0, sizeof(bdev->internal.claim));
    9193          13 :         bdev->internal.claim_type = SPDK_BDEV_CLAIM_NONE;
    9194          13 : }
    9195             : 
    9196             : static void
    9197          16 : bdev_desc_release_claims(struct spdk_bdev_desc *desc)
    9198             : {
    9199          16 :         struct spdk_bdev *bdev = desc->bdev;
    9200             : 
    9201          16 :         assert(spdk_spin_held(&bdev->internal.spinlock));
    9202          16 :         assert(claim_type_is_v2(bdev->internal.claim_type));
    9203             : 
    9204          16 :         if (bdev->internal.examine_in_progress == 0) {
    9205          16 :                 TAILQ_REMOVE(&bdev->internal.claim.v2.claims, desc->claim, link);
    9206          16 :                 free(desc->claim);
    9207          16 :                 if (TAILQ_EMPTY(&bdev->internal.claim.v2.claims)) {
    9208          13 :                         claim_reset(bdev);
    9209          13 :                 }
    9210          16 :         } else {
    9211             :                 /* This is a dead claim that will be cleaned up when bdev_examine() is done. */
    9212           0 :                 desc->claim->module = NULL;
    9213           0 :                 desc->claim->desc = NULL;
    9214             :         }
    9215          16 :         desc->claim = NULL;
    9216          16 : }
    9217             : 
    9218             : /*
    9219             :  * End claims v2
    9220             :  */
    9221             : 
    9222             : struct spdk_bdev *
    9223        1187 : spdk_bdev_desc_get_bdev(struct spdk_bdev_desc *desc)
    9224             : {
    9225        1187 :         assert(desc != NULL);
    9226        1187 :         return desc->bdev;
    9227             : }
    9228             : 
    9229             : int
    9230           1 : spdk_for_each_bdev(void *ctx, spdk_for_each_bdev_fn fn)
    9231             : {
    9232             :         struct spdk_bdev *bdev, *tmp;
    9233             :         struct spdk_bdev_desc *desc;
    9234           1 :         int rc = 0;
    9235             : 
    9236           1 :         assert(fn != NULL);
    9237             : 
    9238           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9239           1 :         bdev = spdk_bdev_first();
    9240           9 :         while (bdev != NULL) {
    9241           8 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9242           8 :                 if (rc != 0) {
    9243           0 :                         break;
    9244             :                 }
    9245           8 :                 rc = bdev_open(bdev, false, desc);
    9246           8 :                 if (rc != 0) {
    9247           1 :                         bdev_desc_free(desc);
    9248           1 :                         if (rc == -ENODEV) {
    9249             :                                 /* Ignore the error and move to the next bdev. */
    9250           1 :                                 rc = 0;
    9251           1 :                                 bdev = spdk_bdev_next(bdev);
    9252           1 :                                 continue;
    9253             :                         }
    9254           0 :                         break;
    9255             :                 }
    9256           7 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9257             : 
    9258           7 :                 rc = fn(ctx, bdev);
    9259             : 
    9260           7 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9261           7 :                 tmp = spdk_bdev_next(bdev);
    9262           7 :                 bdev_close(bdev, desc);
    9263           7 :                 if (rc != 0) {
    9264           0 :                         break;
    9265             :                 }
    9266           7 :                 bdev = tmp;
    9267             :         }
    9268           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9269             : 
    9270           1 :         return rc;
    9271             : }
    9272             : 
    9273             : int
    9274           1 : spdk_for_each_bdev_leaf(void *ctx, spdk_for_each_bdev_fn fn)
    9275             : {
    9276             :         struct spdk_bdev *bdev, *tmp;
    9277             :         struct spdk_bdev_desc *desc;
    9278           1 :         int rc = 0;
    9279             : 
    9280           1 :         assert(fn != NULL);
    9281             : 
    9282           1 :         spdk_spin_lock(&g_bdev_mgr.spinlock);
    9283           1 :         bdev = spdk_bdev_first_leaf();
    9284           6 :         while (bdev != NULL) {
    9285           5 :                 rc = bdev_desc_alloc(bdev, _tmp_bdev_event_cb, NULL, NULL, &desc);
    9286           5 :                 if (rc != 0) {
    9287           0 :                         break;
    9288             :                 }
    9289           5 :                 rc = bdev_open(bdev, false, desc);
    9290           5 :                 if (rc != 0) {
    9291           1 :                         bdev_desc_free(desc);
    9292           1 :                         if (rc == -ENODEV) {
    9293             :                                 /* Ignore the error and move to the next bdev. */
    9294           1 :                                 rc = 0;
    9295           1 :                                 bdev = spdk_bdev_next_leaf(bdev);
    9296           1 :                                 continue;
    9297             :                         }
    9298           0 :                         break;
    9299             :                 }
    9300           4 :                 spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9301             : 
    9302           4 :                 rc = fn(ctx, bdev);
    9303             : 
    9304           4 :                 spdk_spin_lock(&g_bdev_mgr.spinlock);
    9305           4 :                 tmp = spdk_bdev_next_leaf(bdev);
    9306           4 :                 bdev_close(bdev, desc);
    9307           4 :                 if (rc != 0) {
    9308           0 :                         break;
    9309             :                 }
    9310           4 :                 bdev = tmp;
    9311             :         }
    9312           1 :         spdk_spin_unlock(&g_bdev_mgr.spinlock);
    9313             : 
    9314           1 :         return rc;
    9315             : }
    9316             : 
    9317             : void
    9318           0 : spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp)
    9319             : {
    9320             :         struct iovec *iovs;
    9321             :         int iovcnt;
    9322             : 
    9323           0 :         if (bdev_io == NULL) {
    9324           0 :                 return;
    9325             :         }
    9326             : 
    9327           0 :         switch (bdev_io->type) {
    9328             :         case SPDK_BDEV_IO_TYPE_READ:
    9329             :         case SPDK_BDEV_IO_TYPE_WRITE:
    9330             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    9331           0 :                 iovs = bdev_io->u.bdev.iovs;
    9332           0 :                 iovcnt = bdev_io->u.bdev.iovcnt;
    9333           0 :                 break;
    9334             :         default:
    9335           0 :                 iovs = NULL;
    9336           0 :                 iovcnt = 0;
    9337           0 :                 break;
    9338             :         }
    9339             : 
    9340           0 :         if (iovp) {
    9341           0 :                 *iovp = iovs;
    9342           0 :         }
    9343           0 :         if (iovcntp) {
    9344           0 :                 *iovcntp = iovcnt;
    9345           0 :         }
    9346           0 : }
    9347             : 
    9348             : void *
    9349           0 : spdk_bdev_io_get_md_buf(struct spdk_bdev_io *bdev_io)
    9350             : {
    9351           0 :         if (bdev_io == NULL) {
    9352           0 :                 return NULL;
    9353             :         }
    9354             : 
    9355           0 :         if (!spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9356           0 :                 return NULL;
    9357             :         }
    9358             : 
    9359           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_READ ||
    9360           0 :             bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
    9361           0 :                 return bdev_io->u.bdev.md_buf;
    9362             :         }
    9363             : 
    9364           0 :         return NULL;
    9365           0 : }
    9366             : 
    9367             : void *
    9368           0 : spdk_bdev_io_get_cb_arg(struct spdk_bdev_io *bdev_io)
    9369             : {
    9370           0 :         if (bdev_io == NULL) {
    9371           0 :                 assert(false);
    9372             :                 return NULL;
    9373             :         }
    9374             : 
    9375           0 :         return bdev_io->internal.caller_ctx;
    9376             : }
    9377             : 
    9378             : void
    9379           7 : spdk_bdev_module_list_add(struct spdk_bdev_module *bdev_module)
    9380             : {
    9381             : 
    9382           7 :         if (spdk_bdev_module_list_find(bdev_module->name)) {
    9383           0 :                 SPDK_ERRLOG("ERROR: module '%s' already registered.\n", bdev_module->name);
    9384           0 :                 assert(false);
    9385             :         }
    9386             : 
    9387           7 :         spdk_spin_init(&bdev_module->internal.spinlock);
    9388           7 :         TAILQ_INIT(&bdev_module->internal.quiesced_ranges);
    9389             : 
    9390             :         /*
    9391             :          * Modules with examine callbacks must be initialized first, so they are
    9392             :          *  ready to handle examine callbacks from later modules that will
    9393             :          *  register physical bdevs.
    9394             :          */
    9395           7 :         if (bdev_module->examine_config != NULL || bdev_module->examine_disk != NULL) {
    9396           4 :                 TAILQ_INSERT_HEAD(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9397           4 :         } else {
    9398           3 :                 TAILQ_INSERT_TAIL(&g_bdev_mgr.bdev_modules, bdev_module, internal.tailq);
    9399             :         }
    9400           7 : }
    9401             : 
    9402             : struct spdk_bdev_module *
    9403           7 : spdk_bdev_module_list_find(const char *name)
    9404             : {
    9405             :         struct spdk_bdev_module *bdev_module;
    9406             : 
    9407          14 :         TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, internal.tailq) {
    9408           7 :                 if (strcmp(name, bdev_module->name) == 0) {
    9409           0 :                         break;
    9410             :                 }
    9411           7 :         }
    9412             : 
    9413           7 :         return bdev_module;
    9414             : }
    9415             : 
    9416             : static int
    9417           6 : bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io)
    9418             : {
    9419             :         uint64_t num_blocks;
    9420           6 :         void *md_buf = NULL;
    9421             : 
    9422           6 :         num_blocks = bdev_io->u.bdev.num_blocks;
    9423             : 
    9424           6 :         if (spdk_bdev_is_md_separate(bdev_io->bdev)) {
    9425           4 :                 md_buf = (char *)g_bdev_mgr.zero_buffer +
    9426           2 :                          spdk_bdev_get_block_size(bdev_io->bdev) * num_blocks;
    9427           2 :         }
    9428             : 
    9429          12 :         return bdev_write_blocks_with_md(bdev_io->internal.desc,
    9430           6 :                                          spdk_io_channel_from_ctx(bdev_io->internal.ch),
    9431           6 :                                          g_bdev_mgr.zero_buffer, md_buf,
    9432           6 :                                          bdev_io->u.bdev.offset_blocks, num_blocks,
    9433           6 :                                          bdev_write_zero_buffer_done, bdev_io);
    9434             : }
    9435             : 
    9436             : static void
    9437           6 : bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
    9438             : {
    9439           6 :         struct spdk_bdev_io *parent_io = cb_arg;
    9440             : 
    9441           6 :         spdk_bdev_free_io(bdev_io);
    9442             : 
    9443           6 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
    9444           6 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
    9445           6 : }
    9446             : 
    9447             : static void
    9448          10 : bdev_set_qos_limit_done(struct set_qos_limit_ctx *ctx, int status)
    9449             : {
    9450          10 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9451          10 :         ctx->bdev->internal.qos_mod_in_progress = false;
    9452          10 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9453             : 
    9454          10 :         if (ctx->cb_fn) {
    9455           8 :                 ctx->cb_fn(ctx->cb_arg, status);
    9456           8 :         }
    9457          10 :         free(ctx);
    9458          10 : }
    9459             : 
    9460             : static void
    9461           2 : bdev_disable_qos_done(void *cb_arg)
    9462             : {
    9463           2 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9464           2 :         struct spdk_bdev *bdev = ctx->bdev;
    9465             :         struct spdk_bdev_qos *qos;
    9466             : 
    9467           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9468           2 :         qos = bdev->internal.qos;
    9469           2 :         bdev->internal.qos = NULL;
    9470           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9471             : 
    9472           2 :         if (qos->thread != NULL) {
    9473           2 :                 spdk_put_io_channel(spdk_io_channel_from_ctx(qos->ch));
    9474           2 :                 spdk_poller_unregister(&qos->poller);
    9475           2 :         }
    9476             : 
    9477           2 :         free(qos);
    9478             : 
    9479           2 :         bdev_set_qos_limit_done(ctx, 0);
    9480           2 : }
    9481             : 
    9482             : static void
    9483           2 : bdev_disable_qos_msg_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9484             : {
    9485           2 :         struct set_qos_limit_ctx *ctx = _ctx;
    9486             :         struct spdk_thread *thread;
    9487             : 
    9488           2 :         spdk_spin_lock(&bdev->internal.spinlock);
    9489           2 :         thread = bdev->internal.qos->thread;
    9490           2 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9491             : 
    9492           2 :         if (thread != NULL) {
    9493           2 :                 spdk_thread_send_msg(thread, bdev_disable_qos_done, ctx);
    9494           2 :         } else {
    9495           0 :                 bdev_disable_qos_done(ctx);
    9496             :         }
    9497           2 : }
    9498             : 
    9499             : static void
    9500           4 : bdev_disable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9501             :                      struct spdk_io_channel *ch, void *_ctx)
    9502             : {
    9503           4 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9504             :         struct spdk_bdev_io *bdev_io;
    9505             : 
    9506           4 :         bdev_ch->flags &= ~BDEV_CH_QOS_ENABLED;
    9507             : 
    9508           6 :         while (!TAILQ_EMPTY(&bdev_ch->qos_queued_io)) {
    9509             :                 /* Re-submit the queued I/O. */
    9510           2 :                 bdev_io = TAILQ_FIRST(&bdev_ch->qos_queued_io);
    9511           2 :                 TAILQ_REMOVE(&bdev_ch->qos_queued_io, bdev_io, internal.link);
    9512           2 :                 _bdev_io_submit(bdev_io);
    9513             :         }
    9514             : 
    9515           4 :         spdk_bdev_for_each_channel_continue(i, 0);
    9516           4 : }
    9517             : 
    9518             : static void
    9519           1 : bdev_update_qos_rate_limit_msg(void *cb_arg)
    9520             : {
    9521           1 :         struct set_qos_limit_ctx *ctx = cb_arg;
    9522           1 :         struct spdk_bdev *bdev = ctx->bdev;
    9523             : 
    9524           1 :         spdk_spin_lock(&bdev->internal.spinlock);
    9525           1 :         bdev_qos_update_max_quota_per_timeslice(bdev->internal.qos);
    9526           1 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9527             : 
    9528           1 :         bdev_set_qos_limit_done(ctx, 0);
    9529           1 : }
    9530             : 
    9531             : static void
    9532           9 : bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9533             :                     struct spdk_io_channel *ch, void *_ctx)
    9534             : {
    9535           9 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9536             : 
    9537           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9538           9 :         bdev_enable_qos(bdev, bdev_ch);
    9539           9 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9540           9 :         spdk_bdev_for_each_channel_continue(i, 0);
    9541           9 : }
    9542             : 
    9543             : static void
    9544           6 : bdev_enable_qos_done(struct spdk_bdev *bdev, void *_ctx, int status)
    9545             : {
    9546           6 :         struct set_qos_limit_ctx *ctx = _ctx;
    9547             : 
    9548           6 :         bdev_set_qos_limit_done(ctx, status);
    9549           6 : }
    9550             : 
    9551             : static void
    9552           7 : bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits)
    9553             : {
    9554             :         int i;
    9555             : 
    9556           7 :         assert(bdev->internal.qos != NULL);
    9557             : 
    9558          35 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9559          28 :                 if (limits[i] != SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9560          28 :                         bdev->internal.qos->rate_limits[i].limit = limits[i];
    9561             : 
    9562          28 :                         if (limits[i] == 0) {
    9563          19 :                                 bdev->internal.qos->rate_limits[i].limit =
    9564             :                                         SPDK_BDEV_QOS_LIMIT_NOT_DEFINED;
    9565          19 :                         }
    9566          28 :                 }
    9567          28 :         }
    9568           7 : }
    9569             : 
    9570             : void
    9571           9 : spdk_bdev_set_qos_rate_limits(struct spdk_bdev *bdev, uint64_t *limits,
    9572             :                               void (*cb_fn)(void *cb_arg, int status), void *cb_arg)
    9573             : {
    9574             :         struct set_qos_limit_ctx        *ctx;
    9575             :         uint32_t                        limit_set_complement;
    9576             :         uint64_t                        min_limit_per_sec;
    9577             :         int                             i;
    9578           9 :         bool                            disable_rate_limit = true;
    9579             : 
    9580          45 :         for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9581          36 :                 if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED) {
    9582           0 :                         continue;
    9583             :                 }
    9584             : 
    9585          36 :                 if (limits[i] > 0) {
    9586          10 :                         disable_rate_limit = false;
    9587          10 :                 }
    9588             : 
    9589          36 :                 if (bdev_qos_is_iops_rate_limit(i) == true) {
    9590           9 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_IOS_PER_SEC;
    9591           9 :                 } else {
    9592          27 :                         if (limits[i] > SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC) {
    9593           0 :                                 SPDK_WARNLOG("Requested rate limit %" PRIu64 " will result in uint64_t overflow, "
    9594             :                                              "reset to %" PRIu64 "\n", limits[i], SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC);
    9595           0 :                                 limits[i] = SPDK_BDEV_QOS_MAX_MBYTES_PER_SEC;
    9596           0 :                         }
    9597             :                         /* Change from megabyte to byte rate limit */
    9598          27 :                         limits[i] = limits[i] * 1024 * 1024;
    9599          27 :                         min_limit_per_sec = SPDK_BDEV_QOS_MIN_BYTES_PER_SEC;
    9600             :                 }
    9601             : 
    9602          36 :                 limit_set_complement = limits[i] % min_limit_per_sec;
    9603          36 :                 if (limit_set_complement) {
    9604           0 :                         SPDK_ERRLOG("Requested rate limit %" PRIu64 " is not a multiple of %" PRIu64 "\n",
    9605             :                                     limits[i], min_limit_per_sec);
    9606           0 :                         limits[i] += min_limit_per_sec - limit_set_complement;
    9607           0 :                         SPDK_ERRLOG("Round up the rate limit to %" PRIu64 "\n", limits[i]);
    9608           0 :                 }
    9609          36 :         }
    9610             : 
    9611           9 :         ctx = calloc(1, sizeof(*ctx));
    9612           9 :         if (ctx == NULL) {
    9613           0 :                 cb_fn(cb_arg, -ENOMEM);
    9614           0 :                 return;
    9615             :         }
    9616             : 
    9617           9 :         ctx->cb_fn = cb_fn;
    9618           9 :         ctx->cb_arg = cb_arg;
    9619           9 :         ctx->bdev = bdev;
    9620             : 
    9621           9 :         spdk_spin_lock(&bdev->internal.spinlock);
    9622           9 :         if (bdev->internal.qos_mod_in_progress) {
    9623           1 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9624           1 :                 free(ctx);
    9625           1 :                 cb_fn(cb_arg, -EAGAIN);
    9626           1 :                 return;
    9627             :         }
    9628           8 :         bdev->internal.qos_mod_in_progress = true;
    9629             : 
    9630           8 :         if (disable_rate_limit == true && bdev->internal.qos) {
    9631          10 :                 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) {
    9632           8 :                         if (limits[i] == SPDK_BDEV_QOS_LIMIT_NOT_DEFINED &&
    9633           0 :                             (bdev->internal.qos->rate_limits[i].limit > 0 &&
    9634           0 :                              bdev->internal.qos->rate_limits[i].limit !=
    9635             :                              SPDK_BDEV_QOS_LIMIT_NOT_DEFINED)) {
    9636           0 :                                 disable_rate_limit = false;
    9637           0 :                                 break;
    9638             :                         }
    9639           8 :                 }
    9640           2 :         }
    9641             : 
    9642           8 :         if (disable_rate_limit == false) {
    9643           5 :                 if (bdev->internal.qos == NULL) {
    9644           4 :                         bdev->internal.qos = calloc(1, sizeof(*bdev->internal.qos));
    9645           4 :                         if (!bdev->internal.qos) {
    9646           0 :                                 spdk_spin_unlock(&bdev->internal.spinlock);
    9647           0 :                                 SPDK_ERRLOG("Unable to allocate memory for QoS tracking\n");
    9648           0 :                                 bdev_set_qos_limit_done(ctx, -ENOMEM);
    9649           0 :                                 return;
    9650             :                         }
    9651           4 :                 }
    9652             : 
    9653           5 :                 if (bdev->internal.qos->thread == NULL) {
    9654             :                         /* Enabling */
    9655           4 :                         bdev_set_qos_rate_limits(bdev, limits);
    9656             : 
    9657           4 :                         spdk_bdev_for_each_channel(bdev, bdev_enable_qos_msg, ctx,
    9658             :                                                    bdev_enable_qos_done);
    9659           4 :                 } else {
    9660             :                         /* Updating */
    9661           1 :                         bdev_set_qos_rate_limits(bdev, limits);
    9662             : 
    9663           2 :                         spdk_thread_send_msg(bdev->internal.qos->thread,
    9664           1 :                                              bdev_update_qos_rate_limit_msg, ctx);
    9665             :                 }
    9666           5 :         } else {
    9667           3 :                 if (bdev->internal.qos != NULL) {
    9668           2 :                         bdev_set_qos_rate_limits(bdev, limits);
    9669             : 
    9670             :                         /* Disabling */
    9671           2 :                         spdk_bdev_for_each_channel(bdev, bdev_disable_qos_msg, ctx,
    9672             :                                                    bdev_disable_qos_msg_done);
    9673           2 :                 } else {
    9674           1 :                         spdk_spin_unlock(&bdev->internal.spinlock);
    9675           1 :                         bdev_set_qos_limit_done(ctx, 0);
    9676           1 :                         return;
    9677             :                 }
    9678             :         }
    9679             : 
    9680           7 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9681           9 : }
    9682             : 
    9683             : struct spdk_bdev_histogram_ctx {
    9684             :         spdk_bdev_histogram_status_cb cb_fn;
    9685             :         void *cb_arg;
    9686             :         struct spdk_bdev *bdev;
    9687             :         int status;
    9688             : };
    9689             : 
    9690             : static void
    9691           2 : bdev_histogram_disable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9692             : {
    9693           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9694             : 
    9695           2 :         spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9696           2 :         ctx->bdev->internal.histogram_in_progress = false;
    9697           2 :         spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9698           2 :         ctx->cb_fn(ctx->cb_arg, ctx->status);
    9699           2 :         free(ctx);
    9700           2 : }
    9701             : 
    9702             : static void
    9703           3 : bdev_histogram_disable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9704             :                                struct spdk_io_channel *_ch, void *_ctx)
    9705             : {
    9706           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9707             : 
    9708           3 :         if (ch->histogram != NULL) {
    9709           3 :                 spdk_histogram_data_free(ch->histogram);
    9710           3 :                 ch->histogram = NULL;
    9711           3 :         }
    9712           3 :         spdk_bdev_for_each_channel_continue(i, 0);
    9713           3 : }
    9714             : 
    9715             : static void
    9716           2 : bdev_histogram_enable_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9717             : {
    9718           2 :         struct spdk_bdev_histogram_ctx *ctx = _ctx;
    9719             : 
    9720           2 :         if (status != 0) {
    9721           0 :                 ctx->status = status;
    9722           0 :                 ctx->bdev->internal.histogram_enabled = false;
    9723           0 :                 spdk_bdev_for_each_channel(ctx->bdev, bdev_histogram_disable_channel, ctx,
    9724             :                                            bdev_histogram_disable_channel_cb);
    9725           0 :         } else {
    9726           2 :                 spdk_spin_lock(&ctx->bdev->internal.spinlock);
    9727           2 :                 ctx->bdev->internal.histogram_in_progress = false;
    9728           2 :                 spdk_spin_unlock(&ctx->bdev->internal.spinlock);
    9729           2 :                 ctx->cb_fn(ctx->cb_arg, ctx->status);
    9730           2 :                 free(ctx);
    9731             :         }
    9732           2 : }
    9733             : 
    9734             : static void
    9735           3 : bdev_histogram_enable_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9736             :                               struct spdk_io_channel *_ch, void *_ctx)
    9737             : {
    9738           3 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9739           3 :         int status = 0;
    9740             : 
    9741           3 :         if (ch->histogram == NULL) {
    9742           3 :                 ch->histogram = spdk_histogram_data_alloc();
    9743           3 :                 if (ch->histogram == NULL) {
    9744           0 :                         status = -ENOMEM;
    9745           0 :                 }
    9746           3 :         }
    9747             : 
    9748           3 :         spdk_bdev_for_each_channel_continue(i, status);
    9749           3 : }
    9750             : 
    9751             : void
    9752           4 : spdk_bdev_histogram_enable_ext(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
    9753             :                                void *cb_arg, bool enable, struct spdk_bdev_enable_histogram_opts *opts)
    9754             : {
    9755             :         struct spdk_bdev_histogram_ctx *ctx;
    9756             : 
    9757           4 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_ctx));
    9758           4 :         if (ctx == NULL) {
    9759           0 :                 cb_fn(cb_arg, -ENOMEM);
    9760           0 :                 return;
    9761             :         }
    9762             : 
    9763           4 :         ctx->bdev = bdev;
    9764           4 :         ctx->status = 0;
    9765           4 :         ctx->cb_fn = cb_fn;
    9766           4 :         ctx->cb_arg = cb_arg;
    9767             : 
    9768           4 :         spdk_spin_lock(&bdev->internal.spinlock);
    9769           4 :         if (bdev->internal.histogram_in_progress) {
    9770           0 :                 spdk_spin_unlock(&bdev->internal.spinlock);
    9771           0 :                 free(ctx);
    9772           0 :                 cb_fn(cb_arg, -EAGAIN);
    9773           0 :                 return;
    9774             :         }
    9775             : 
    9776           4 :         bdev->internal.histogram_in_progress = true;
    9777           4 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9778             : 
    9779           4 :         bdev->internal.histogram_enabled = enable;
    9780           4 :         bdev->internal.histogram_io_type = opts->io_type;
    9781             : 
    9782           4 :         if (enable) {
    9783             :                 /* Allocate histogram for each channel */
    9784           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_enable_channel, ctx,
    9785             :                                            bdev_histogram_enable_channel_cb);
    9786           2 :         } else {
    9787           2 :                 spdk_bdev_for_each_channel(bdev, bdev_histogram_disable_channel, ctx,
    9788             :                                            bdev_histogram_disable_channel_cb);
    9789             :         }
    9790           4 : }
    9791             : 
    9792             : void
    9793           4 : spdk_bdev_enable_histogram_opts_init(struct spdk_bdev_enable_histogram_opts *opts, size_t size)
    9794             : {
    9795           4 :         if (opts == NULL) {
    9796           0 :                 SPDK_ERRLOG("opts should not be NULL\n");
    9797           0 :                 assert(opts != NULL);
    9798           0 :                 return;
    9799             :         }
    9800           4 :         if (size == 0) {
    9801           0 :                 SPDK_ERRLOG("size should not be zero\n");
    9802           0 :                 assert(size != 0);
    9803           0 :                 return;
    9804             :         }
    9805             : 
    9806           4 :         memset(opts, 0, size);
    9807           4 :         opts->size = size;
    9808             : 
    9809             : #define FIELD_OK(field) \
    9810             :         offsetof(struct spdk_bdev_enable_histogram_opts, field) + sizeof(opts->field) <= size
    9811             : 
    9812             : #define SET_FIELD(field, value) \
    9813             :         if (FIELD_OK(field)) { \
    9814             :                 opts->field = value; \
    9815             :         } \
    9816             : 
    9817           4 :         SET_FIELD(io_type, 0);
    9818             : 
    9819             :         /* You should not remove this statement, but need to update the assert statement
    9820             :          * if you add a new field, and also add a corresponding SET_FIELD statement */
    9821             :         SPDK_STATIC_ASSERT(sizeof(struct spdk_bdev_enable_histogram_opts) == 9, "Incorrect size");
    9822             : 
    9823             : #undef FIELD_OK
    9824             : #undef SET_FIELD
    9825           4 : }
    9826             : 
    9827             : void
    9828           4 : spdk_bdev_histogram_enable(struct spdk_bdev *bdev, spdk_bdev_histogram_status_cb cb_fn,
    9829             :                            void *cb_arg, bool enable)
    9830             : {
    9831             :         struct spdk_bdev_enable_histogram_opts opts;
    9832             : 
    9833           4 :         spdk_bdev_enable_histogram_opts_init(&opts, sizeof(opts));
    9834           4 :         spdk_bdev_histogram_enable_ext(bdev, cb_fn, cb_arg, enable, &opts);
    9835           4 : }
    9836             : 
    9837             : struct spdk_bdev_histogram_data_ctx {
    9838             :         spdk_bdev_histogram_data_cb cb_fn;
    9839             :         void *cb_arg;
    9840             :         struct spdk_bdev *bdev;
    9841             :         /** merged histogram data from all channels */
    9842             :         struct spdk_histogram_data      *histogram;
    9843             : };
    9844             : 
    9845             : static void
    9846           5 : bdev_histogram_get_channel_cb(struct spdk_bdev *bdev, void *_ctx, int status)
    9847             : {
    9848           5 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
    9849             : 
    9850           5 :         ctx->cb_fn(ctx->cb_arg, status, ctx->histogram);
    9851           5 :         free(ctx);
    9852           5 : }
    9853             : 
    9854             : static void
    9855           7 : bdev_histogram_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
    9856             :                            struct spdk_io_channel *_ch, void *_ctx)
    9857             : {
    9858           7 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
    9859           7 :         struct spdk_bdev_histogram_data_ctx *ctx = _ctx;
    9860           7 :         int status = 0;
    9861             : 
    9862           7 :         if (ch->histogram == NULL) {
    9863           1 :                 status = -EFAULT;
    9864           1 :         } else {
    9865           6 :                 spdk_histogram_data_merge(ctx->histogram, ch->histogram);
    9866             :         }
    9867             : 
    9868           7 :         spdk_bdev_for_each_channel_continue(i, status);
    9869           7 : }
    9870             : 
    9871             : void
    9872           5 : spdk_bdev_histogram_get(struct spdk_bdev *bdev, struct spdk_histogram_data *histogram,
    9873             :                         spdk_bdev_histogram_data_cb cb_fn,
    9874             :                         void *cb_arg)
    9875             : {
    9876             :         struct spdk_bdev_histogram_data_ctx *ctx;
    9877             : 
    9878           5 :         ctx = calloc(1, sizeof(struct spdk_bdev_histogram_data_ctx));
    9879           5 :         if (ctx == NULL) {
    9880           0 :                 cb_fn(cb_arg, -ENOMEM, NULL);
    9881           0 :                 return;
    9882             :         }
    9883             : 
    9884           5 :         ctx->bdev = bdev;
    9885           5 :         ctx->cb_fn = cb_fn;
    9886           5 :         ctx->cb_arg = cb_arg;
    9887             : 
    9888           5 :         ctx->histogram = histogram;
    9889             : 
    9890           5 :         spdk_bdev_for_each_channel(bdev, bdev_histogram_get_channel, ctx,
    9891             :                                    bdev_histogram_get_channel_cb);
    9892           5 : }
    9893             : 
    9894             : void
    9895           2 : spdk_bdev_channel_get_histogram(struct spdk_io_channel *ch, spdk_bdev_histogram_data_cb cb_fn,
    9896             :                                 void *cb_arg)
    9897             : {
    9898           2 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(ch);
    9899           2 :         int status = 0;
    9900             : 
    9901           2 :         assert(cb_fn != NULL);
    9902             : 
    9903           2 :         if (bdev_ch->histogram == NULL) {
    9904           1 :                 status = -EFAULT;
    9905           1 :         }
    9906           2 :         cb_fn(cb_arg, status, bdev_ch->histogram);
    9907           2 : }
    9908             : 
    9909             : size_t
    9910           0 : spdk_bdev_get_media_events(struct spdk_bdev_desc *desc, struct spdk_bdev_media_event *events,
    9911             :                            size_t max_events)
    9912             : {
    9913             :         struct media_event_entry *entry;
    9914           0 :         size_t num_events = 0;
    9915             : 
    9916           0 :         for (; num_events < max_events; ++num_events) {
    9917           0 :                 entry = TAILQ_FIRST(&desc->pending_media_events);
    9918           0 :                 if (entry == NULL) {
    9919           0 :                         break;
    9920             :                 }
    9921             : 
    9922           0 :                 events[num_events] = entry->event;
    9923           0 :                 TAILQ_REMOVE(&desc->pending_media_events, entry, tailq);
    9924           0 :                 TAILQ_INSERT_TAIL(&desc->free_media_events, entry, tailq);
    9925           0 :         }
    9926             : 
    9927           0 :         return num_events;
    9928             : }
    9929             : 
    9930             : int
    9931           0 : spdk_bdev_push_media_events(struct spdk_bdev *bdev, const struct spdk_bdev_media_event *events,
    9932             :                             size_t num_events)
    9933             : {
    9934             :         struct spdk_bdev_desc *desc;
    9935             :         struct media_event_entry *entry;
    9936             :         size_t event_id;
    9937           0 :         int rc = 0;
    9938             : 
    9939           0 :         assert(bdev->media_events);
    9940             : 
    9941           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    9942           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
    9943           0 :                 if (desc->write) {
    9944           0 :                         break;
    9945             :                 }
    9946           0 :         }
    9947             : 
    9948           0 :         if (desc == NULL || desc->media_events_buffer == NULL) {
    9949           0 :                 rc = -ENODEV;
    9950           0 :                 goto out;
    9951             :         }
    9952             : 
    9953           0 :         for (event_id = 0; event_id < num_events; ++event_id) {
    9954           0 :                 entry = TAILQ_FIRST(&desc->free_media_events);
    9955           0 :                 if (entry == NULL) {
    9956           0 :                         break;
    9957             :                 }
    9958             : 
    9959           0 :                 TAILQ_REMOVE(&desc->free_media_events, entry, tailq);
    9960           0 :                 TAILQ_INSERT_TAIL(&desc->pending_media_events, entry, tailq);
    9961           0 :                 entry->event = events[event_id];
    9962           0 :         }
    9963             : 
    9964           0 :         rc = event_id;
    9965             : out:
    9966           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9967           0 :         return rc;
    9968             : }
    9969             : 
    9970             : static void
    9971           0 : _media_management_notify(void *arg)
    9972             : {
    9973           0 :         struct spdk_bdev_desc *desc = arg;
    9974             : 
    9975           0 :         _event_notify(desc, SPDK_BDEV_EVENT_MEDIA_MANAGEMENT);
    9976           0 : }
    9977             : 
    9978             : void
    9979           0 : spdk_bdev_notify_media_management(struct spdk_bdev *bdev)
    9980             : {
    9981             :         struct spdk_bdev_desc *desc;
    9982             : 
    9983           0 :         spdk_spin_lock(&bdev->internal.spinlock);
    9984           0 :         TAILQ_FOREACH(desc, &bdev->internal.open_descs, link) {
    9985           0 :                 if (!TAILQ_EMPTY(&desc->pending_media_events)) {
    9986           0 :                         event_notify(desc, _media_management_notify);
    9987           0 :                 }
    9988           0 :         }
    9989           0 :         spdk_spin_unlock(&bdev->internal.spinlock);
    9990           0 : }
    9991             : 
    9992             : struct locked_lba_range_ctx {
    9993             :         struct lba_range                range;
    9994             :         struct lba_range                *current_range;
    9995             :         struct lba_range                *owner_range;
    9996             :         struct spdk_poller              *poller;
    9997             :         lock_range_cb                   cb_fn;
    9998             :         void                            *cb_arg;
    9999             : };
   10000             : 
   10001             : static void
   10002           0 : bdev_lock_error_cleanup_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10003             : {
   10004           0 :         struct locked_lba_range_ctx *ctx = _ctx;
   10005             : 
   10006           0 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, -ENOMEM);
   10007           0 :         free(ctx);
   10008           0 : }
   10009             : 
   10010             : static void bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i,
   10011             :                 struct spdk_bdev *bdev, struct spdk_io_channel *ch, void *_ctx);
   10012             : 
   10013             : static void
   10014          14 : bdev_lock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10015             : {
   10016          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10017             : 
   10018          14 :         if (status == -ENOMEM) {
   10019             :                 /* One of the channels could not allocate a range object.
   10020             :                  * So we have to go back and clean up any ranges that were
   10021             :                  * allocated successfully before we return error status to
   10022             :                  * the caller.  We can reuse the unlock function to do that
   10023             :                  * clean up.
   10024             :                  */
   10025           0 :                 spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10026             :                                            bdev_lock_error_cleanup_cb);
   10027           0 :                 return;
   10028             :         }
   10029             : 
   10030             :         /* All channels have locked this range and no I/O overlapping the range
   10031             :          * are outstanding!  Set the owner_ch for the range object for the
   10032             :          * locking channel, so that this channel will know that it is allowed
   10033             :          * to write to this range.
   10034             :          */
   10035          14 :         if (ctx->owner_range != NULL) {
   10036          10 :                 ctx->owner_range->owner_ch = ctx->range.owner_ch;
   10037          10 :         }
   10038             : 
   10039          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10040             : 
   10041             :         /* Don't free the ctx here.  Its range is in the bdev's global list of
   10042             :          * locked ranges still, and will be removed and freed when this range
   10043             :          * is later unlocked.
   10044             :          */
   10045          14 : }
   10046             : 
   10047             : static int
   10048          17 : bdev_lock_lba_range_check_io(void *_i)
   10049             : {
   10050          17 :         struct spdk_bdev_channel_iter *i = _i;
   10051          17 :         struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i->i);
   10052          17 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10053          17 :         struct locked_lba_range_ctx *ctx = i->ctx;
   10054          17 :         struct lba_range *range = ctx->current_range;
   10055             :         struct spdk_bdev_io *bdev_io;
   10056             : 
   10057          17 :         spdk_poller_unregister(&ctx->poller);
   10058             : 
   10059             :         /* The range is now in the locked_ranges, so no new IO can be submitted to this
   10060             :          * range.  But we need to wait until any outstanding IO overlapping with this range
   10061             :          * are completed.
   10062             :          */
   10063          18 :         TAILQ_FOREACH(bdev_io, &ch->io_submitted, internal.ch_link) {
   10064           3 :                 if (bdev_io_range_is_locked(bdev_io, range)) {
   10065           2 :                         ctx->poller = SPDK_POLLER_REGISTER(bdev_lock_lba_range_check_io, i, 100);
   10066           2 :                         return SPDK_POLLER_BUSY;
   10067             :                 }
   10068           1 :         }
   10069             : 
   10070          15 :         spdk_bdev_for_each_channel_continue(i, 0);
   10071          15 :         return SPDK_POLLER_BUSY;
   10072          17 : }
   10073             : 
   10074             : static void
   10075          15 : bdev_lock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10076             :                                 struct spdk_io_channel *_ch, void *_ctx)
   10077             : {
   10078          15 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10079          15 :         struct locked_lba_range_ctx *ctx = _ctx;
   10080             :         struct lba_range *range;
   10081             : 
   10082          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10083           1 :                 if (range->length == ctx->range.length &&
   10084           0 :                     range->offset == ctx->range.offset &&
   10085           0 :                     range->locked_ctx == ctx->range.locked_ctx) {
   10086             :                         /* This range already exists on this channel, so don't add
   10087             :                          * it again.  This can happen when a new channel is created
   10088             :                          * while the for_each_channel operation is in progress.
   10089             :                          * Do not check for outstanding I/O in that case, since the
   10090             :                          * range was locked before any I/O could be submitted to the
   10091             :                          * new channel.
   10092             :                          */
   10093           0 :                         spdk_bdev_for_each_channel_continue(i, 0);
   10094           0 :                         return;
   10095             :                 }
   10096           1 :         }
   10097             : 
   10098          15 :         range = calloc(1, sizeof(*range));
   10099          15 :         if (range == NULL) {
   10100           0 :                 spdk_bdev_for_each_channel_continue(i, -ENOMEM);
   10101           0 :                 return;
   10102             :         }
   10103             : 
   10104          15 :         range->length = ctx->range.length;
   10105          15 :         range->offset = ctx->range.offset;
   10106          15 :         range->locked_ctx = ctx->range.locked_ctx;
   10107          15 :         range->quiesce = ctx->range.quiesce;
   10108          15 :         ctx->current_range = range;
   10109          15 :         if (ctx->range.owner_ch == ch) {
   10110             :                 /* This is the range object for the channel that will hold
   10111             :                  * the lock.  Store it in the ctx object so that we can easily
   10112             :                  * set its owner_ch after the lock is finally acquired.
   10113             :                  */
   10114          10 :                 ctx->owner_range = range;
   10115          10 :         }
   10116          15 :         TAILQ_INSERT_TAIL(&ch->locked_ranges, range, tailq);
   10117          15 :         bdev_lock_lba_range_check_io(i);
   10118          15 : }
   10119             : 
   10120             : static void
   10121          14 : bdev_lock_lba_range_ctx(struct spdk_bdev *bdev, struct locked_lba_range_ctx *ctx)
   10122             : {
   10123          14 :         assert(spdk_get_thread() == ctx->range.owner_thread);
   10124          14 :         assert(ctx->range.owner_ch == NULL ||
   10125             :                spdk_io_channel_get_thread(ctx->range.owner_ch->channel) == ctx->range.owner_thread);
   10126             : 
   10127             :         /* We will add a copy of this range to each channel now. */
   10128          14 :         spdk_bdev_for_each_channel(bdev, bdev_lock_lba_range_get_channel, ctx,
   10129             :                                    bdev_lock_lba_range_cb);
   10130          14 : }
   10131             : 
   10132             : static bool
   10133          17 : bdev_lba_range_overlaps_tailq(struct lba_range *range, lba_range_tailq_t *tailq)
   10134             : {
   10135             :         struct lba_range *r;
   10136             : 
   10137          18 :         TAILQ_FOREACH(r, tailq, tailq) {
   10138           4 :                 if (bdev_lba_range_overlapped(range, r)) {
   10139           3 :                         return true;
   10140             :                 }
   10141           1 :         }
   10142          14 :         return false;
   10143          17 : }
   10144             : 
   10145             : static void bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status);
   10146             : 
   10147             : static int
   10148          14 : _bdev_lock_lba_range(struct spdk_bdev *bdev, struct spdk_bdev_channel *ch,
   10149             :                      uint64_t offset, uint64_t length,
   10150             :                      lock_range_cb cb_fn, void *cb_arg)
   10151             : {
   10152             :         struct locked_lba_range_ctx *ctx;
   10153             : 
   10154          14 :         ctx = calloc(1, sizeof(*ctx));
   10155          14 :         if (ctx == NULL) {
   10156           0 :                 return -ENOMEM;
   10157             :         }
   10158             : 
   10159          14 :         ctx->range.offset = offset;
   10160          14 :         ctx->range.length = length;
   10161          14 :         ctx->range.owner_thread = spdk_get_thread();
   10162          14 :         ctx->range.owner_ch = ch;
   10163          14 :         ctx->range.locked_ctx = cb_arg;
   10164          14 :         ctx->range.bdev = bdev;
   10165          14 :         ctx->range.quiesce = (cb_fn == bdev_quiesce_range_locked);
   10166          14 :         ctx->cb_fn = cb_fn;
   10167          14 :         ctx->cb_arg = cb_arg;
   10168             : 
   10169          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10170          14 :         if (bdev_lba_range_overlaps_tailq(&ctx->range, &bdev->internal.locked_ranges)) {
   10171             :                 /* There is an active lock overlapping with this range.
   10172             :                  * Put it on the pending list until this range no
   10173             :                  * longer overlaps with another.
   10174             :                  */
   10175           2 :                 TAILQ_INSERT_TAIL(&bdev->internal.pending_locked_ranges, &ctx->range, tailq);
   10176           2 :         } else {
   10177          12 :                 TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, &ctx->range, tailq);
   10178          12 :                 bdev_lock_lba_range_ctx(bdev, ctx);
   10179             :         }
   10180          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10181          14 :         return 0;
   10182          14 : }
   10183             : 
   10184             : static int
   10185          10 : bdev_lock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10186             :                     uint64_t offset, uint64_t length,
   10187             :                     lock_range_cb cb_fn, void *cb_arg)
   10188             : {
   10189          10 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10190          10 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10191             : 
   10192          10 :         if (cb_arg == NULL) {
   10193           0 :                 SPDK_ERRLOG("cb_arg must not be NULL\n");
   10194           0 :                 return -EINVAL;
   10195             :         }
   10196             : 
   10197          10 :         return _bdev_lock_lba_range(bdev, ch, offset, length, cb_fn, cb_arg);
   10198          10 : }
   10199             : 
   10200             : static void
   10201           2 : bdev_lock_lba_range_ctx_msg(void *_ctx)
   10202             : {
   10203           2 :         struct locked_lba_range_ctx *ctx = _ctx;
   10204             : 
   10205           2 :         bdev_lock_lba_range_ctx(ctx->range.bdev, ctx);
   10206           2 : }
   10207             : 
   10208             : static void
   10209          14 : bdev_unlock_lba_range_cb(struct spdk_bdev *bdev, void *_ctx, int status)
   10210             : {
   10211          14 :         struct locked_lba_range_ctx *ctx = _ctx;
   10212             :         struct locked_lba_range_ctx *pending_ctx;
   10213             :         struct lba_range *range, *tmp;
   10214             : 
   10215          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10216             :         /* Check if there are any pending locked ranges that overlap with this range
   10217             :          * that was just unlocked.  If there are, check that it doesn't overlap with any
   10218             :          * other locked ranges before calling bdev_lock_lba_range_ctx which will start
   10219             :          * the lock process.
   10220             :          */
   10221          17 :         TAILQ_FOREACH_SAFE(range, &bdev->internal.pending_locked_ranges, tailq, tmp) {
   10222           3 :                 if (bdev_lba_range_overlapped(range, &ctx->range) &&
   10223           3 :                     !bdev_lba_range_overlaps_tailq(range, &bdev->internal.locked_ranges)) {
   10224           2 :                         TAILQ_REMOVE(&bdev->internal.pending_locked_ranges, range, tailq);
   10225           2 :                         pending_ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10226           2 :                         TAILQ_INSERT_TAIL(&bdev->internal.locked_ranges, range, tailq);
   10227           4 :                         spdk_thread_send_msg(pending_ctx->range.owner_thread,
   10228           2 :                                              bdev_lock_lba_range_ctx_msg, pending_ctx);
   10229           2 :                 }
   10230           3 :         }
   10231          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10232             : 
   10233          14 :         ctx->cb_fn(&ctx->range, ctx->cb_arg, status);
   10234          14 :         free(ctx);
   10235          14 : }
   10236             : 
   10237             : static void
   10238          16 : bdev_unlock_lba_range_get_channel(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10239             :                                   struct spdk_io_channel *_ch, void *_ctx)
   10240             : {
   10241          16 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10242          16 :         struct locked_lba_range_ctx *ctx = _ctx;
   10243             :         TAILQ_HEAD(, spdk_bdev_io) io_locked;
   10244             :         struct spdk_bdev_io *bdev_io;
   10245             :         struct lba_range *range;
   10246             : 
   10247          16 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10248          32 :                 if (ctx->range.offset == range->offset &&
   10249          16 :                     ctx->range.length == range->length &&
   10250          16 :                     ctx->range.locked_ctx == range->locked_ctx) {
   10251          16 :                         TAILQ_REMOVE(&ch->locked_ranges, range, tailq);
   10252          16 :                         free(range);
   10253          16 :                         break;
   10254             :                 }
   10255           0 :         }
   10256             : 
   10257             :         /* Note: we should almost always be able to assert that the range specified
   10258             :          * was found.  But there are some very rare corner cases where a new channel
   10259             :          * gets created simultaneously with a range unlock, where this function
   10260             :          * would execute on that new channel and wouldn't have the range.
   10261             :          * We also use this to clean up range allocations when a later allocation
   10262             :          * fails in the locking path.
   10263             :          * So we can't actually assert() here.
   10264             :          */
   10265             : 
   10266             :         /* Swap the locked IO into a temporary list, and then try to submit them again.
   10267             :          * We could hyper-optimize this to only resubmit locked I/O that overlap
   10268             :          * with the range that was just unlocked, but this isn't a performance path so
   10269             :          * we go for simplicity here.
   10270             :          */
   10271          16 :         TAILQ_INIT(&io_locked);
   10272          16 :         TAILQ_SWAP(&ch->io_locked, &io_locked, spdk_bdev_io, internal.ch_link);
   10273          19 :         while (!TAILQ_EMPTY(&io_locked)) {
   10274           3 :                 bdev_io = TAILQ_FIRST(&io_locked);
   10275           3 :                 TAILQ_REMOVE(&io_locked, bdev_io, internal.ch_link);
   10276           3 :                 bdev_io_submit(bdev_io);
   10277             :         }
   10278             : 
   10279          16 :         spdk_bdev_for_each_channel_continue(i, 0);
   10280          16 : }
   10281             : 
   10282             : static int
   10283          14 : _bdev_unlock_lba_range(struct spdk_bdev *bdev, uint64_t offset, uint64_t length,
   10284             :                        lock_range_cb cb_fn, void *cb_arg)
   10285             : {
   10286             :         struct locked_lba_range_ctx *ctx;
   10287             :         struct lba_range *range;
   10288             : 
   10289          14 :         spdk_spin_lock(&bdev->internal.spinlock);
   10290             :         /* To start the unlock the process, we find the range in the bdev's locked_ranges
   10291             :          * and remove it. This ensures new channels don't inherit the locked range.
   10292             :          * Then we will send a message to each channel to remove the range from its
   10293             :          * per-channel list.
   10294             :          */
   10295          14 :         TAILQ_FOREACH(range, &bdev->internal.locked_ranges, tailq) {
   10296          24 :                 if (range->offset == offset && range->length == length &&
   10297          14 :                     (range->owner_ch == NULL || range->locked_ctx == cb_arg)) {
   10298          14 :                         break;
   10299             :                 }
   10300           0 :         }
   10301          14 :         if (range == NULL) {
   10302           0 :                 assert(false);
   10303             :                 spdk_spin_unlock(&bdev->internal.spinlock);
   10304             :                 return -EINVAL;
   10305             :         }
   10306          14 :         TAILQ_REMOVE(&bdev->internal.locked_ranges, range, tailq);
   10307          14 :         ctx = SPDK_CONTAINEROF(range, struct locked_lba_range_ctx, range);
   10308          14 :         spdk_spin_unlock(&bdev->internal.spinlock);
   10309             : 
   10310          14 :         ctx->cb_fn = cb_fn;
   10311          14 :         ctx->cb_arg = cb_arg;
   10312             : 
   10313          14 :         spdk_bdev_for_each_channel(bdev, bdev_unlock_lba_range_get_channel, ctx,
   10314             :                                    bdev_unlock_lba_range_cb);
   10315          14 :         return 0;
   10316             : }
   10317             : 
   10318             : static int
   10319          12 : bdev_unlock_lba_range(struct spdk_bdev_desc *desc, struct spdk_io_channel *_ch,
   10320             :                       uint64_t offset, uint64_t length,
   10321             :                       lock_range_cb cb_fn, void *cb_arg)
   10322             : {
   10323          12 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10324          12 :         struct spdk_bdev_channel *ch = __io_ch_to_bdev_ch(_ch);
   10325             :         struct lba_range *range;
   10326          12 :         bool range_found = false;
   10327             : 
   10328             :         /* Let's make sure the specified channel actually has a lock on
   10329             :          * the specified range.  Note that the range must match exactly.
   10330             :          */
   10331          14 :         TAILQ_FOREACH(range, &ch->locked_ranges, tailq) {
   10332          22 :                 if (range->offset == offset && range->length == length &&
   10333          11 :                     range->owner_ch == ch && range->locked_ctx == cb_arg) {
   10334          10 :                         range_found = true;
   10335          10 :                         break;
   10336             :                 }
   10337           2 :         }
   10338             : 
   10339          12 :         if (!range_found) {
   10340           2 :                 return -EINVAL;
   10341             :         }
   10342             : 
   10343          10 :         return _bdev_unlock_lba_range(bdev, offset, length, cb_fn, cb_arg);
   10344          12 : }
   10345             : 
   10346             : struct bdev_quiesce_ctx {
   10347             :         spdk_bdev_quiesce_cb cb_fn;
   10348             :         void *cb_arg;
   10349             : };
   10350             : 
   10351             : static void
   10352           4 : bdev_unquiesce_range_unlocked(struct lba_range *range, void *ctx, int status)
   10353             : {
   10354           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10355             : 
   10356           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10357           4 :                 quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10358           4 :         }
   10359             : 
   10360           4 :         free(quiesce_ctx);
   10361           4 : }
   10362             : 
   10363             : static void
   10364           4 : bdev_quiesce_range_locked(struct lba_range *range, void *ctx, int status)
   10365             : {
   10366           4 :         struct bdev_quiesce_ctx *quiesce_ctx = ctx;
   10367           4 :         struct spdk_bdev_module *module = range->bdev->module;
   10368             : 
   10369           4 :         if (status != 0) {
   10370           0 :                 if (quiesce_ctx->cb_fn != NULL) {
   10371           0 :                         quiesce_ctx->cb_fn(quiesce_ctx->cb_arg, status);
   10372           0 :                 }
   10373           0 :                 free(quiesce_ctx);
   10374           0 :                 return;
   10375             :         }
   10376             : 
   10377           4 :         spdk_spin_lock(&module->internal.spinlock);
   10378           4 :         TAILQ_INSERT_TAIL(&module->internal.quiesced_ranges, range, tailq_module);
   10379           4 :         spdk_spin_unlock(&module->internal.spinlock);
   10380             : 
   10381           4 :         if (quiesce_ctx->cb_fn != NULL) {
   10382             :                 /* copy the context in case the range is unlocked by the callback */
   10383           4 :                 struct bdev_quiesce_ctx tmp = *quiesce_ctx;
   10384             : 
   10385           4 :                 quiesce_ctx->cb_fn = NULL;
   10386           4 :                 quiesce_ctx->cb_arg = NULL;
   10387             : 
   10388           4 :                 tmp.cb_fn(tmp.cb_arg, status);
   10389           4 :         }
   10390             :         /* quiesce_ctx will be freed on unquiesce */
   10391           4 : }
   10392             : 
   10393             : static int
   10394           9 : _spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10395             :                    uint64_t offset, uint64_t length,
   10396             :                    spdk_bdev_quiesce_cb cb_fn, void *cb_arg,
   10397             :                    bool unquiesce)
   10398             : {
   10399             :         struct bdev_quiesce_ctx *quiesce_ctx;
   10400             :         int rc;
   10401             : 
   10402           9 :         if (module != bdev->module) {
   10403           0 :                 SPDK_ERRLOG("Bdev does not belong to specified module.\n");
   10404           0 :                 return -EINVAL;
   10405             :         }
   10406             : 
   10407           9 :         if (!bdev_io_valid_blocks(bdev, offset, length)) {
   10408           0 :                 return -EINVAL;
   10409             :         }
   10410             : 
   10411           9 :         if (unquiesce) {
   10412             :                 struct lba_range *range;
   10413             : 
   10414             :                 /* Make sure the specified range is actually quiesced in the specified module and
   10415             :                  * then remove it from the list. Note that the range must match exactly.
   10416             :                  */
   10417           5 :                 spdk_spin_lock(&module->internal.spinlock);
   10418           6 :                 TAILQ_FOREACH(range, &module->internal.quiesced_ranges, tailq_module) {
   10419           5 :                         if (range->bdev == bdev && range->offset == offset && range->length == length) {
   10420           4 :                                 TAILQ_REMOVE(&module->internal.quiesced_ranges, range, tailq_module);
   10421           4 :                                 break;
   10422             :                         }
   10423           1 :                 }
   10424           5 :                 spdk_spin_unlock(&module->internal.spinlock);
   10425             : 
   10426           5 :                 if (range == NULL) {
   10427           1 :                         SPDK_ERRLOG("The range to unquiesce was not found.\n");
   10428           1 :                         return -EINVAL;
   10429             :                 }
   10430             : 
   10431           4 :                 quiesce_ctx = range->locked_ctx;
   10432           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10433           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10434             : 
   10435           4 :                 rc = _bdev_unlock_lba_range(bdev, offset, length, bdev_unquiesce_range_unlocked, quiesce_ctx);
   10436           4 :         } else {
   10437           4 :                 quiesce_ctx = malloc(sizeof(*quiesce_ctx));
   10438           4 :                 if (quiesce_ctx == NULL) {
   10439           0 :                         return -ENOMEM;
   10440             :                 }
   10441             : 
   10442           4 :                 quiesce_ctx->cb_fn = cb_fn;
   10443           4 :                 quiesce_ctx->cb_arg = cb_arg;
   10444             : 
   10445           4 :                 rc = _bdev_lock_lba_range(bdev, NULL, offset, length, bdev_quiesce_range_locked, quiesce_ctx);
   10446           4 :                 if (rc != 0) {
   10447           0 :                         free(quiesce_ctx);
   10448           0 :                 }
   10449             :         }
   10450             : 
   10451           8 :         return rc;
   10452           9 : }
   10453             : 
   10454             : int
   10455           3 : spdk_bdev_quiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10456             :                   spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10457             : {
   10458           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, false);
   10459             : }
   10460             : 
   10461             : int
   10462           3 : spdk_bdev_unquiesce(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10463             :                     spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10464             : {
   10465           3 :         return _spdk_bdev_quiesce(bdev, module, 0, bdev->blockcnt, cb_fn, cb_arg, true);
   10466             : }
   10467             : 
   10468             : int
   10469           1 : spdk_bdev_quiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10470             :                         uint64_t offset, uint64_t length,
   10471             :                         spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10472             : {
   10473           1 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, false);
   10474             : }
   10475             : 
   10476             : int
   10477           2 : spdk_bdev_unquiesce_range(struct spdk_bdev *bdev, struct spdk_bdev_module *module,
   10478             :                           uint64_t offset, uint64_t length,
   10479             :                           spdk_bdev_quiesce_cb cb_fn, void *cb_arg)
   10480             : {
   10481           2 :         return _spdk_bdev_quiesce(bdev, module, offset, length, cb_fn, cb_arg, true);
   10482             : }
   10483             : 
   10484             : int
   10485         272 : spdk_bdev_get_memory_domains(struct spdk_bdev *bdev, struct spdk_memory_domain **domains,
   10486             :                              int array_size)
   10487             : {
   10488         272 :         if (!bdev) {
   10489           1 :                 return -EINVAL;
   10490             :         }
   10491             : 
   10492         271 :         if (bdev->fn_table->get_memory_domains) {
   10493           3 :                 return bdev->fn_table->get_memory_domains(bdev->ctxt, domains, array_size);
   10494             :         }
   10495             : 
   10496         268 :         return 0;
   10497         272 : }
   10498             : 
   10499             : struct spdk_bdev_for_each_io_ctx {
   10500             :         void *ctx;
   10501             :         spdk_bdev_io_fn fn;
   10502             :         spdk_bdev_for_each_io_cb cb;
   10503             : };
   10504             : 
   10505             : static void
   10506           0 : bdev_channel_for_each_io(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
   10507             :                          struct spdk_io_channel *io_ch, void *_ctx)
   10508             : {
   10509           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10510           0 :         struct spdk_bdev_channel *bdev_ch = __io_ch_to_bdev_ch(io_ch);
   10511             :         struct spdk_bdev_io *bdev_io;
   10512           0 :         int rc = 0;
   10513             : 
   10514           0 :         TAILQ_FOREACH(bdev_io, &bdev_ch->io_submitted, internal.ch_link) {
   10515           0 :                 rc = ctx->fn(ctx->ctx, bdev_io);
   10516           0 :                 if (rc != 0) {
   10517           0 :                         break;
   10518             :                 }
   10519           0 :         }
   10520             : 
   10521           0 :         spdk_bdev_for_each_channel_continue(i, rc);
   10522           0 : }
   10523             : 
   10524             : static void
   10525           0 : bdev_for_each_io_done(struct spdk_bdev *bdev, void *_ctx, int status)
   10526             : {
   10527           0 :         struct spdk_bdev_for_each_io_ctx *ctx = _ctx;
   10528             : 
   10529           0 :         ctx->cb(ctx->ctx, status);
   10530             : 
   10531           0 :         free(ctx);
   10532           0 : }
   10533             : 
   10534             : void
   10535           0 : spdk_bdev_for_each_bdev_io(struct spdk_bdev *bdev, void *_ctx, spdk_bdev_io_fn fn,
   10536             :                            spdk_bdev_for_each_io_cb cb)
   10537             : {
   10538             :         struct spdk_bdev_for_each_io_ctx *ctx;
   10539             : 
   10540           0 :         assert(fn != NULL && cb != NULL);
   10541             : 
   10542           0 :         ctx = calloc(1, sizeof(*ctx));
   10543           0 :         if (ctx == NULL) {
   10544           0 :                 SPDK_ERRLOG("Failed to allocate context.\n");
   10545           0 :                 cb(_ctx, -ENOMEM);
   10546           0 :                 return;
   10547             :         }
   10548             : 
   10549           0 :         ctx->ctx = _ctx;
   10550           0 :         ctx->fn = fn;
   10551           0 :         ctx->cb = cb;
   10552             : 
   10553           0 :         spdk_bdev_for_each_channel(bdev, bdev_channel_for_each_io, ctx,
   10554             :                                    bdev_for_each_io_done);
   10555           0 : }
   10556             : 
   10557             : void
   10558         132 : spdk_bdev_for_each_channel_continue(struct spdk_bdev_channel_iter *iter, int status)
   10559             : {
   10560         132 :         spdk_for_each_channel_continue(iter->i, status);
   10561         132 : }
   10562             : 
   10563             : static struct spdk_bdev *
   10564         361 : io_channel_iter_get_bdev(struct spdk_io_channel_iter *i)
   10565             : {
   10566         361 :         void *io_device = spdk_io_channel_iter_get_io_device(i);
   10567             : 
   10568         361 :         return __bdev_from_io_dev(io_device);
   10569             : }
   10570             : 
   10571             : static void
   10572         132 : bdev_each_channel_msg(struct spdk_io_channel_iter *i)
   10573             : {
   10574         132 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10575         132 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10576         132 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
   10577             : 
   10578         132 :         iter->i = i;
   10579         132 :         iter->fn(iter, bdev, ch, iter->ctx);
   10580         132 : }
   10581             : 
   10582             : static void
   10583         229 : bdev_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
   10584             : {
   10585         229 :         struct spdk_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
   10586         229 :         struct spdk_bdev *bdev = io_channel_iter_get_bdev(i);
   10587             : 
   10588         229 :         iter->i = i;
   10589         229 :         iter->cpl(bdev, iter->ctx, status);
   10590             : 
   10591         229 :         free(iter);
   10592         229 : }
   10593             : 
   10594             : void
   10595         229 : spdk_bdev_for_each_channel(struct spdk_bdev *bdev, spdk_bdev_for_each_channel_msg fn,
   10596             :                            void *ctx, spdk_bdev_for_each_channel_done cpl)
   10597             : {
   10598             :         struct spdk_bdev_channel_iter *iter;
   10599             : 
   10600         229 :         assert(bdev != NULL && fn != NULL && ctx != NULL);
   10601             : 
   10602         229 :         iter = calloc(1, sizeof(struct spdk_bdev_channel_iter));
   10603         229 :         if (iter == NULL) {
   10604           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
   10605           0 :                 assert(false);
   10606             :                 return;
   10607             :         }
   10608             : 
   10609         229 :         iter->fn = fn;
   10610         229 :         iter->cpl = cpl;
   10611         229 :         iter->ctx = ctx;
   10612             : 
   10613         458 :         spdk_for_each_channel(__bdev_to_io_dev(bdev), bdev_each_channel_msg,
   10614         229 :                               iter, bdev_each_channel_cpl);
   10615         229 : }
   10616             : 
   10617             : static void
   10618           3 : bdev_copy_do_write_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10619             : {
   10620           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10621             : 
   10622           3 :         spdk_bdev_free_io(bdev_io);
   10623             : 
   10624             :         /* Check return status of write */
   10625           3 :         parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
   10626           3 :         parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
   10627           3 : }
   10628             : 
   10629             : static void
   10630           3 : bdev_copy_do_write(void *_bdev_io)
   10631             : {
   10632           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10633             :         int rc;
   10634             : 
   10635             :         /* Write blocks */
   10636           6 :         rc = spdk_bdev_write_blocks_with_md(bdev_io->internal.desc,
   10637           3 :                                             spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10638           3 :                                             bdev_io->u.bdev.iovs[0].iov_base,
   10639           3 :                                             bdev_io->u.bdev.md_buf, bdev_io->u.bdev.offset_blocks,
   10640           3 :                                             bdev_io->u.bdev.num_blocks, bdev_copy_do_write_done, bdev_io);
   10641             : 
   10642           3 :         if (rc == -ENOMEM) {
   10643           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_write);
   10644           3 :         } else if (rc != 0) {
   10645           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10646           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10647           0 :         }
   10648           3 : }
   10649             : 
   10650             : static void
   10651           3 : bdev_copy_do_read_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
   10652             : {
   10653           3 :         struct spdk_bdev_io *parent_io = cb_arg;
   10654             : 
   10655           3 :         spdk_bdev_free_io(bdev_io);
   10656             : 
   10657             :         /* Check return status of read */
   10658           3 :         if (!success) {
   10659           0 :                 parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10660           0 :                 parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
   10661           0 :                 return;
   10662             :         }
   10663             : 
   10664             :         /* Do write */
   10665           3 :         bdev_copy_do_write(parent_io);
   10666           3 : }
   10667             : 
   10668             : static void
   10669           3 : bdev_copy_do_read(void *_bdev_io)
   10670             : {
   10671           3 :         struct spdk_bdev_io *bdev_io = _bdev_io;
   10672             :         int rc;
   10673             : 
   10674             :         /* Read blocks */
   10675           6 :         rc = spdk_bdev_read_blocks_with_md(bdev_io->internal.desc,
   10676           3 :                                            spdk_io_channel_from_ctx(bdev_io->internal.ch),
   10677           3 :                                            bdev_io->u.bdev.iovs[0].iov_base,
   10678           3 :                                            bdev_io->u.bdev.md_buf, bdev_io->u.bdev.copy.src_offset_blocks,
   10679           3 :                                            bdev_io->u.bdev.num_blocks, bdev_copy_do_read_done, bdev_io);
   10680             : 
   10681           3 :         if (rc == -ENOMEM) {
   10682           0 :                 bdev_queue_io_wait_with_cb(bdev_io, bdev_copy_do_read);
   10683           3 :         } else if (rc != 0) {
   10684           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10685           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10686           0 :         }
   10687           3 : }
   10688             : 
   10689             : static void
   10690           3 : bdev_copy_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io, bool success)
   10691             : {
   10692           3 :         if (!success) {
   10693           0 :                 bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
   10694           0 :                 bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
   10695           0 :                 return;
   10696             :         }
   10697             : 
   10698           3 :         bdev_copy_do_read(bdev_io);
   10699           3 : }
   10700             : 
   10701             : int
   10702          27 : spdk_bdev_copy_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
   10703             :                       uint64_t dst_offset_blocks, uint64_t src_offset_blocks, uint64_t num_blocks,
   10704             :                       spdk_bdev_io_completion_cb cb, void *cb_arg)
   10705             : {
   10706          27 :         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
   10707             :         struct spdk_bdev_io *bdev_io;
   10708          27 :         struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
   10709             : 
   10710          27 :         if (!desc->write) {
   10711           0 :                 return -EBADF;
   10712             :         }
   10713             : 
   10714          27 :         if (!bdev_io_valid_blocks(bdev, dst_offset_blocks, num_blocks) ||
   10715          27 :             !bdev_io_valid_blocks(bdev, src_offset_blocks, num_blocks)) {
   10716           0 :                 SPDK_DEBUGLOG(bdev,
   10717             :                               "Invalid offset or number of blocks: dst %lu, src %lu, count %lu\n",
   10718             :                               dst_offset_blocks, src_offset_blocks, num_blocks);
   10719           0 :                 return -EINVAL;
   10720             :         }
   10721             : 
   10722          27 :         bdev_io = bdev_channel_get_io(channel);
   10723          27 :         if (!bdev_io) {
   10724           0 :                 return -ENOMEM;
   10725             :         }
   10726             : 
   10727          27 :         bdev_io->internal.ch = channel;
   10728          27 :         bdev_io->internal.desc = desc;
   10729          27 :         bdev_io->type = SPDK_BDEV_IO_TYPE_COPY;
   10730             : 
   10731          27 :         bdev_io->u.bdev.offset_blocks = dst_offset_blocks;
   10732          27 :         bdev_io->u.bdev.copy.src_offset_blocks = src_offset_blocks;
   10733          27 :         bdev_io->u.bdev.num_blocks = num_blocks;
   10734          27 :         bdev_io->u.bdev.memory_domain = NULL;
   10735          27 :         bdev_io->u.bdev.memory_domain_ctx = NULL;
   10736          27 :         bdev_io->u.bdev.iovs = NULL;
   10737          27 :         bdev_io->u.bdev.iovcnt = 0;
   10738          27 :         bdev_io->u.bdev.md_buf = NULL;
   10739          27 :         bdev_io->u.bdev.accel_sequence = NULL;
   10740          27 :         bdev_io_init(bdev_io, bdev, cb_arg, cb);
   10741             : 
   10742          27 :         if (dst_offset_blocks == src_offset_blocks || num_blocks == 0) {
   10743           0 :                 spdk_thread_send_msg(spdk_get_thread(), bdev_io_complete_cb, bdev_io);
   10744           0 :                 return 0;
   10745             :         }
   10746             : 
   10747             : 
   10748             :         /* If the copy size is large and should be split, use the generic split logic
   10749             :          * regardless of whether SPDK_BDEV_IO_TYPE_COPY is supported or not.
   10750             :          *
   10751             :          * Then, send the copy request if SPDK_BDEV_IO_TYPE_COPY is supported or
   10752             :          * emulate it using regular read and write requests otherwise.
   10753             :          */
   10754          27 :         if (spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COPY) ||
   10755           4 :             bdev_io->internal.f.split) {
   10756          24 :                 bdev_io_submit(bdev_io);
   10757          24 :                 return 0;
   10758             :         }
   10759             : 
   10760           3 :         spdk_bdev_io_get_buf(bdev_io, bdev_copy_get_buf_cb, num_blocks * spdk_bdev_get_block_size(bdev));
   10761             : 
   10762           3 :         return 0;
   10763          27 : }
   10764             : 
   10765           3 : SPDK_LOG_REGISTER_COMPONENT(bdev)
   10766             : 
   10767             : static void
   10768           0 : bdev_trace(void)
   10769             : {
   10770           0 :         struct spdk_trace_tpoint_opts opts[] = {
   10771             :                 {
   10772             :                         "BDEV_IO_START", TRACE_BDEV_IO_START,
   10773             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 1,
   10774             :                         {
   10775             :                                 { "type", SPDK_TRACE_ARG_TYPE_INT, 8 },
   10776             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   10777             :                                 { "offset", SPDK_TRACE_ARG_TYPE_INT, 8 },
   10778             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   10779             :                         }
   10780             :                 },
   10781             :                 {
   10782             :                         "BDEV_IO_DONE", TRACE_BDEV_IO_DONE,
   10783             :                         OWNER_TYPE_BDEV, OBJECT_BDEV_IO, 0,
   10784             :                         {
   10785             :                                 { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
   10786             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
   10787             :                         }
   10788             :                 },
   10789             :                 {
   10790             :                         "BDEV_IOCH_CREATE", TRACE_BDEV_IOCH_CREATE,
   10791             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   10792             :                         {
   10793             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   10794             :                         }
   10795             :                 },
   10796             :                 {
   10797             :                         "BDEV_IOCH_DESTROY", TRACE_BDEV_IOCH_DESTROY,
   10798             :                         OWNER_TYPE_BDEV, OBJECT_NONE, 0,
   10799             :                         {
   10800             :                                 { "tid", SPDK_TRACE_ARG_TYPE_INT, 8 }
   10801             :                         }
   10802             :                 },
   10803             :         };
   10804             : 
   10805             : 
   10806           0 :         spdk_trace_register_owner_type(OWNER_TYPE_BDEV, 'b');
   10807           0 :         spdk_trace_register_object(OBJECT_BDEV_IO, 'i');
   10808           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
   10809           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_START, OBJECT_BDEV_IO, 0);
   10810           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_NVME_IO_DONE, OBJECT_BDEV_IO, 0);
   10811           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_START, OBJECT_BDEV_IO, 0);
   10812           0 :         spdk_trace_tpoint_register_relation(TRACE_BLOB_REQ_SET_COMPLETE, OBJECT_BDEV_IO, 0);
   10813           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_START, OBJECT_BDEV_IO, 0);
   10814           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_RAID_IO_DONE, OBJECT_BDEV_IO, 0);
   10815           0 : }
   10816           3 : SPDK_TRACE_REGISTER_FN(bdev_trace, "bdev", TRACE_GROUP_BDEV)

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