LCOV - code coverage report
Current view: top level - module/bdev/nvme - bdev_nvme.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 2660 4999 53.2 %
Date: 2024-11-04 11:13:37 Functions: 225 326 69.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2021-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  *   Copyright (c) 2022 Dell Inc, or its subsidiaries. All rights reserved.
       6             :  */
       7             : 
       8             : #include "spdk/stdinc.h"
       9             : 
      10             : #include "bdev_nvme.h"
      11             : 
      12             : #include "spdk/accel.h"
      13             : #include "spdk/config.h"
      14             : #include "spdk/endian.h"
      15             : #include "spdk/bdev.h"
      16             : #include "spdk/json.h"
      17             : #include "spdk/keyring.h"
      18             : #include "spdk/likely.h"
      19             : #include "spdk/nvme.h"
      20             : #include "spdk/nvme_ocssd.h"
      21             : #include "spdk/nvme_zns.h"
      22             : #include "spdk/opal.h"
      23             : #include "spdk/thread.h"
      24             : #include "spdk/trace.h"
      25             : #include "spdk/string.h"
      26             : #include "spdk/util.h"
      27             : #include "spdk/uuid.h"
      28             : 
      29             : #include "spdk/bdev_module.h"
      30             : #include "spdk/log.h"
      31             : 
      32             : #include "spdk_internal/usdt.h"
      33             : #include "spdk_internal/trace_defs.h"
      34             : 
      35             : #define CTRLR_STRING(nvme_ctrlr) \
      36             :         (spdk_nvme_trtype_is_fabrics(nvme_ctrlr->active_path_id->trid.trtype) ? \
      37             :         nvme_ctrlr->active_path_id->trid.subnqn : nvme_ctrlr->active_path_id->trid.traddr)
      38             : 
      39             : #define CTRLR_ID(nvme_ctrlr)    (spdk_nvme_ctrlr_get_id(nvme_ctrlr->ctrlr))
      40             : 
      41             : #define NVME_CTRLR_ERRLOG(ctrlr, format, ...) \
      42             :         SPDK_ERRLOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      43             : 
      44             : #define NVME_CTRLR_WARNLOG(ctrlr, format, ...) \
      45             :         SPDK_WARNLOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      46             : 
      47             : #define NVME_CTRLR_NOTICELOG(ctrlr, format, ...) \
      48             :         SPDK_NOTICELOG("[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      49             : 
      50             : #define NVME_CTRLR_INFOLOG(ctrlr, format, ...) \
      51             :         SPDK_INFOLOG(bdev_nvme, "[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      52             : 
      53             : #ifdef DEBUG
      54             : #define NVME_CTRLR_DEBUGLOG(ctrlr, format, ...) \
      55             :         SPDK_DEBUGLOG(bdev_nvme, "[%s, %u] " format, CTRLR_STRING(ctrlr), CTRLR_ID(ctrlr), ##__VA_ARGS__);
      56             : #else
      57             : #define NVME_CTRLR_DEBUGLOG(ctrlr, ...) do { } while (0)
      58             : #endif
      59             : 
      60             : #define BDEV_STRING(nbdev) (nbdev->disk.name)
      61             : 
      62             : #define NVME_BDEV_ERRLOG(nbdev, format, ...) \
      63             :         SPDK_ERRLOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      64             : 
      65             : #define NVME_BDEV_WARNLOG(nbdev, format, ...) \
      66             :         SPDK_WARNLOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      67             : 
      68             : #define NVME_BDEV_NOTICELOG(nbdev, format, ...) \
      69             :         SPDK_NOTICELOG("[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      70             : 
      71             : #define NVME_BDEV_INFOLOG(nbdev, format, ...) \
      72             :         SPDK_INFOLOG(bdev_nvme, "[%s] " format, BDEV_STRING(nbdev), ##__VA_ARGS__);
      73             : 
      74             : #define SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT true
      75             : #define SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS (10000)
      76             : 
      77             : #define NSID_STR_LEN 10
      78             : 
      79             : #define SPDK_CONTROLLER_NAME_MAX 512
      80             : 
      81             : static int bdev_nvme_config_json(struct spdk_json_write_ctx *w);
      82             : 
      83             : struct nvme_bdev_io {
      84             :         /** array of iovecs to transfer. */
      85             :         struct iovec *iovs;
      86             : 
      87             :         /** Number of iovecs in iovs array. */
      88             :         int iovcnt;
      89             : 
      90             :         /** Current iovec position. */
      91             :         int iovpos;
      92             : 
      93             :         /** Offset in current iovec. */
      94             :         uint32_t iov_offset;
      95             : 
      96             :         /** Offset in current iovec. */
      97             :         uint32_t fused_iov_offset;
      98             : 
      99             :         /** array of iovecs to transfer. */
     100             :         struct iovec *fused_iovs;
     101             : 
     102             :         /** Number of iovecs in iovs array. */
     103             :         int fused_iovcnt;
     104             : 
     105             :         /** Current iovec position. */
     106             :         int fused_iovpos;
     107             : 
     108             :         /** I/O path the current I/O or admin passthrough is submitted on, or the I/O path
     109             :          *  being reset in a reset I/O.
     110             :          */
     111             :         struct nvme_io_path *io_path;
     112             : 
     113             :         /** Saved status for admin passthru completion event, PI error verification, or intermediate compare-and-write status */
     114             :         struct spdk_nvme_cpl cpl;
     115             : 
     116             :         /** Extended IO opts passed by the user to bdev layer and mapped to NVME format */
     117             :         struct spdk_nvme_ns_cmd_ext_io_opts ext_opts;
     118             : 
     119             :         /** Keeps track if first of fused commands was submitted */
     120             :         bool first_fused_submitted;
     121             : 
     122             :         /** Keeps track if first of fused commands was completed */
     123             :         bool first_fused_completed;
     124             : 
     125             :         /* How many times the current I/O was retried. */
     126             :         int32_t retry_count;
     127             : 
     128             :         /** Expiration value in ticks to retry the current I/O. */
     129             :         uint64_t retry_ticks;
     130             : 
     131             :         /** Temporary pointer to zone report buffer */
     132             :         struct spdk_nvme_zns_zone_report *zone_report_buf;
     133             : 
     134             :         /** Keep track of how many zones that have been copied to the spdk_bdev_zone_info struct */
     135             :         uint64_t handled_zones;
     136             : 
     137             :         /* Current tsc at submit time. */
     138             :         uint64_t submit_tsc;
     139             : 
     140             :         /* Used to put nvme_bdev_io into the list */
     141             :         TAILQ_ENTRY(nvme_bdev_io) retry_link;
     142             : };
     143             : 
     144             : struct nvme_probe_skip_entry {
     145             :         struct spdk_nvme_transport_id           trid;
     146             :         TAILQ_ENTRY(nvme_probe_skip_entry)      tailq;
     147             : };
     148             : /* All the controllers deleted by users via RPC are skipped by hotplug monitor */
     149             : static TAILQ_HEAD(, nvme_probe_skip_entry) g_skipped_nvme_ctrlrs = TAILQ_HEAD_INITIALIZER(
     150             :                         g_skipped_nvme_ctrlrs);
     151             : 
     152             : #define BDEV_NVME_DEFAULT_DIGESTS (SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA256) | \
     153             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA384) | \
     154             :                                    SPDK_BIT(SPDK_NVMF_DHCHAP_HASH_SHA512))
     155             : 
     156             : #define BDEV_NVME_DEFAULT_DHGROUPS (SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_NULL) | \
     157             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_2048) | \
     158             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_3072) | \
     159             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_4096) | \
     160             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_6144) | \
     161             :                                     SPDK_BIT(SPDK_NVMF_DHCHAP_DHGROUP_8192))
     162             : 
     163             : static struct spdk_bdev_nvme_opts g_opts = {
     164             :         .action_on_timeout = SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE,
     165             :         .timeout_us = 0,
     166             :         .timeout_admin_us = 0,
     167             :         .keep_alive_timeout_ms = SPDK_BDEV_NVME_DEFAULT_KEEP_ALIVE_TIMEOUT_IN_MS,
     168             :         .transport_retry_count = 4,
     169             :         .arbitration_burst = 0,
     170             :         .low_priority_weight = 0,
     171             :         .medium_priority_weight = 0,
     172             :         .high_priority_weight = 0,
     173             :         .nvme_adminq_poll_period_us = 10000ULL,
     174             :         .nvme_ioq_poll_period_us = 0,
     175             :         .io_queue_requests = 0,
     176             :         .delay_cmd_submit = SPDK_BDEV_NVME_DEFAULT_DELAY_CMD_SUBMIT,
     177             :         .bdev_retry_count = 3,
     178             :         .transport_ack_timeout = 0,
     179             :         .ctrlr_loss_timeout_sec = 0,
     180             :         .reconnect_delay_sec = 0,
     181             :         .fast_io_fail_timeout_sec = 0,
     182             :         .disable_auto_failback = false,
     183             :         .generate_uuids = false,
     184             :         .transport_tos = 0,
     185             :         .nvme_error_stat = false,
     186             :         .io_path_stat = false,
     187             :         .allow_accel_sequence = false,
     188             :         .dhchap_digests = BDEV_NVME_DEFAULT_DIGESTS,
     189             :         .dhchap_dhgroups = BDEV_NVME_DEFAULT_DHGROUPS,
     190             : };
     191             : 
     192             : #define NVME_HOTPLUG_POLL_PERIOD_MAX                    10000000ULL
     193             : #define NVME_HOTPLUG_POLL_PERIOD_DEFAULT                100000ULL
     194             : 
     195             : static int g_hot_insert_nvme_controller_index = 0;
     196             : static uint64_t g_nvme_hotplug_poll_period_us = NVME_HOTPLUG_POLL_PERIOD_DEFAULT;
     197             : static bool g_nvme_hotplug_enabled = false;
     198             : struct spdk_thread *g_bdev_nvme_init_thread;
     199             : static struct spdk_poller *g_hotplug_poller;
     200             : static struct spdk_poller *g_hotplug_probe_poller;
     201             : static struct spdk_nvme_probe_ctx *g_hotplug_probe_ctx;
     202             : 
     203             : static void nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
     204             :                 struct nvme_async_probe_ctx *ctx);
     205             : static void nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
     206             :                 struct nvme_async_probe_ctx *ctx);
     207             : static int bdev_nvme_library_init(void);
     208             : static void bdev_nvme_library_fini(void);
     209             : static void _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch,
     210             :                                       struct spdk_bdev_io *bdev_io);
     211             : static void bdev_nvme_submit_request(struct spdk_io_channel *ch,
     212             :                                      struct spdk_bdev_io *bdev_io);
     213             : static int bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     214             :                            void *md, uint64_t lba_count, uint64_t lba,
     215             :                            uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     216             :                            struct spdk_accel_sequence *seq);
     217             : static int bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     218             :                                  void *md, uint64_t lba_count, uint64_t lba);
     219             : static int bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     220             :                             void *md, uint64_t lba_count, uint64_t lba,
     221             :                             uint32_t flags, struct spdk_memory_domain *domain, void *domain_ctx,
     222             :                             struct spdk_accel_sequence *seq,
     223             :                             union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13);
     224             : static int bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     225             :                                   void *md, uint64_t lba_count,
     226             :                                   uint64_t zslba, uint32_t flags);
     227             : static int bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
     228             :                               void *md, uint64_t lba_count, uint64_t lba,
     229             :                               uint32_t flags);
     230             : static int bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio,
     231             :                 struct iovec *cmp_iov, int cmp_iovcnt, struct iovec *write_iov,
     232             :                 int write_iovcnt, void *md, uint64_t lba_count, uint64_t lba,
     233             :                 uint32_t flags);
     234             : static int bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id,
     235             :                                    uint32_t num_zones, struct spdk_bdev_zone_info *info);
     236             : static int bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
     237             :                                      enum spdk_bdev_zone_action action);
     238             : static void bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch,
     239             :                                      struct nvme_bdev_io *bio,
     240             :                                      struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes);
     241             : static int bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     242             :                                  void *buf, size_t nbytes);
     243             : static int bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     244             :                                     void *buf, size_t nbytes, void *md_buf, size_t md_len);
     245             : static int bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
     246             :                                      struct iovec *iov, int iovcnt, size_t nbytes,
     247             :                                      void *md_buf, size_t md_len);
     248             : static void bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch,
     249             :                             struct nvme_bdev_io *bio, struct nvme_bdev_io *bio_to_abort);
     250             : static void bdev_nvme_reset_io(struct nvme_bdev *nbdev, struct nvme_bdev_io *bio);
     251             : static int bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     252             : static int bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
     253             : static void remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr);
     254             : static int nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr);
     255             : 
     256             : static struct nvme_ns *nvme_ns_alloc(void);
     257             : static void nvme_ns_free(struct nvme_ns *ns);
     258             : 
     259             : static int
     260         175 : nvme_ns_cmp(struct nvme_ns *ns1, struct nvme_ns *ns2)
     261             : {
     262         175 :         return ns1->id < ns2->id ? -1 : ns1->id > ns2->id;
     263             : }
     264             : 
     265        1070 : RB_GENERATE_STATIC(nvme_ns_tree, nvme_ns, node, nvme_ns_cmp);
     266             : 
     267             : struct spdk_nvme_qpair *
     268           1 : bdev_nvme_get_io_qpair(struct spdk_io_channel *ctrlr_io_ch)
     269             : {
     270             :         struct nvme_ctrlr_channel *ctrlr_ch;
     271             : 
     272           1 :         assert(ctrlr_io_ch != NULL);
     273             : 
     274           1 :         ctrlr_ch = spdk_io_channel_get_ctx(ctrlr_io_ch);
     275             : 
     276           1 :         return ctrlr_ch->qpair->qpair;
     277             : }
     278             : 
     279             : static int
     280           0 : bdev_nvme_get_ctx_size(void)
     281             : {
     282           0 :         return sizeof(struct nvme_bdev_io);
     283             : }
     284             : 
     285             : static struct spdk_bdev_module nvme_if = {
     286             :         .name = "nvme",
     287             :         .async_fini = true,
     288             :         .module_init = bdev_nvme_library_init,
     289             :         .module_fini = bdev_nvme_library_fini,
     290             :         .config_json = bdev_nvme_config_json,
     291             :         .get_ctx_size = bdev_nvme_get_ctx_size,
     292             : 
     293             : };
     294           1 : SPDK_BDEV_MODULE_REGISTER(nvme, &nvme_if)
     295             : 
     296             : struct nvme_bdev_ctrlrs g_nvme_bdev_ctrlrs = TAILQ_HEAD_INITIALIZER(g_nvme_bdev_ctrlrs);
     297             : pthread_mutex_t g_bdev_nvme_mutex = PTHREAD_MUTEX_INITIALIZER;
     298             : bool g_bdev_nvme_module_finish;
     299             : 
     300             : struct nvme_bdev_ctrlr *
     301         327 : nvme_bdev_ctrlr_get_by_name(const char *name)
     302             : {
     303             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     304             : 
     305         327 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     306         169 :                 if (strcmp(name, nbdev_ctrlr->name) == 0) {
     307         169 :                         break;
     308             :                 }
     309           0 :         }
     310             : 
     311         327 :         return nbdev_ctrlr;
     312             : }
     313             : 
     314             : static struct nvme_ctrlr *
     315          58 : nvme_bdev_ctrlr_get_ctrlr(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     316             :                           const struct spdk_nvme_transport_id *trid, const char *hostnqn)
     317             : {
     318             :         const struct spdk_nvme_ctrlr_opts *opts;
     319             :         struct nvme_ctrlr *nvme_ctrlr;
     320             : 
     321          99 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     322          74 :                 opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
     323          74 :                 if (spdk_nvme_transport_id_compare(trid, &nvme_ctrlr->active_path_id->trid) == 0 &&
     324          33 :                     strcmp(hostnqn, opts->hostnqn) == 0) {
     325          33 :                         break;
     326             :                 }
     327          41 :         }
     328             : 
     329          58 :         return nvme_ctrlr;
     330             : }
     331             : 
     332             : struct nvme_ctrlr *
     333           0 : nvme_bdev_ctrlr_get_ctrlr_by_id(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     334             :                                 uint16_t cntlid)
     335             : {
     336             :         struct nvme_ctrlr *nvme_ctrlr;
     337             :         const struct spdk_nvme_ctrlr_data *cdata;
     338             : 
     339           0 :         TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
     340           0 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
     341           0 :                 if (cdata->cntlid == cntlid) {
     342           0 :                         break;
     343             :                 }
     344           0 :         }
     345             : 
     346           0 :         return nvme_ctrlr;
     347             : }
     348             : 
     349             : static struct nvme_bdev *
     350          73 : nvme_bdev_ctrlr_get_bdev(struct nvme_bdev_ctrlr *nbdev_ctrlr, uint32_t nsid)
     351             : {
     352             :         struct nvme_bdev *bdev;
     353             : 
     354          73 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     355         107 :         TAILQ_FOREACH(bdev, &nbdev_ctrlr->bdevs, tailq) {
     356          68 :                 if (bdev->nsid == nsid) {
     357          34 :                         break;
     358             :                 }
     359          34 :         }
     360          73 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     361             : 
     362          73 :         return bdev;
     363             : }
     364             : 
     365             : struct nvme_ns *
     366         143 : nvme_ctrlr_get_ns(struct nvme_ctrlr *nvme_ctrlr, uint32_t nsid)
     367             : {
     368             :         struct nvme_ns ns;
     369             : 
     370         143 :         assert(nsid > 0);
     371             : 
     372         143 :         ns.id = nsid;
     373         143 :         return RB_FIND(nvme_ns_tree, &nvme_ctrlr->namespaces, &ns);
     374             : }
     375             : 
     376             : struct nvme_ns *
     377         162 : nvme_ctrlr_get_first_active_ns(struct nvme_ctrlr *nvme_ctrlr)
     378             : {
     379         162 :         return RB_MIN(nvme_ns_tree, &nvme_ctrlr->namespaces);
     380             : }
     381             : 
     382             : struct nvme_ns *
     383          72 : nvme_ctrlr_get_next_active_ns(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *ns)
     384             : {
     385          72 :         if (ns == NULL) {
     386           0 :                 return NULL;
     387             :         }
     388             : 
     389          72 :         return RB_NEXT(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     390          72 : }
     391             : 
     392             : static struct nvme_ctrlr *
     393          52 : nvme_ctrlr_get(const struct spdk_nvme_transport_id *trid, const char *hostnqn)
     394             : {
     395             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
     396          52 :         struct nvme_ctrlr       *nvme_ctrlr = NULL;
     397             : 
     398          52 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     399          71 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     400          19 :                 nvme_ctrlr = nvme_bdev_ctrlr_get_ctrlr(nbdev_ctrlr, trid, hostnqn);
     401          19 :                 if (nvme_ctrlr != NULL) {
     402           0 :                         break;
     403             :                 }
     404          19 :         }
     405          52 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     406             : 
     407          52 :         return nvme_ctrlr;
     408             : }
     409             : 
     410             : struct nvme_ctrlr *
     411         125 : nvme_ctrlr_get_by_name(const char *name)
     412             : {
     413             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     414         125 :         struct nvme_ctrlr *nvme_ctrlr = NULL;
     415             : 
     416         125 :         if (name == NULL) {
     417           0 :                 return NULL;
     418             :         }
     419             : 
     420         125 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     421         125 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
     422         125 :         if (nbdev_ctrlr != NULL) {
     423          60 :                 nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
     424          60 :         }
     425         125 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     426             : 
     427         125 :         return nvme_ctrlr;
     428         125 : }
     429             : 
     430             : void
     431           0 : nvme_bdev_ctrlr_for_each(nvme_bdev_ctrlr_for_each_fn fn, void *ctx)
     432             : {
     433             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
     434             : 
     435           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     436           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
     437           0 :                 fn(nbdev_ctrlr, ctx);
     438           0 :         }
     439           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     440           0 : }
     441             : 
     442             : struct nvme_ctrlr_channel_iter {
     443             :         nvme_ctrlr_for_each_channel_msg fn;
     444             :         nvme_ctrlr_for_each_channel_done cpl;
     445             :         struct spdk_io_channel_iter *i;
     446             :         void *ctx;
     447             : };
     448             : 
     449             : void
     450         284 : nvme_ctrlr_for_each_channel_continue(struct nvme_ctrlr_channel_iter *iter, int status)
     451             : {
     452         284 :         spdk_for_each_channel_continue(iter->i, status);
     453         284 : }
     454             : 
     455             : static void
     456         284 : nvme_ctrlr_each_channel_msg(struct spdk_io_channel_iter *i)
     457             : {
     458         284 :         struct nvme_ctrlr_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     459         284 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
     460         284 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     461         284 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(ch);
     462             : 
     463         284 :         iter->i = i;
     464         284 :         iter->fn(iter, nvme_ctrlr, ctrlr_ch, iter->ctx);
     465         284 : }
     466             : 
     467             : static void
     468         165 : nvme_ctrlr_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
     469             : {
     470         165 :         struct nvme_ctrlr_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     471         165 :         struct nvme_ctrlr *nvme_ctrlr = spdk_io_channel_iter_get_io_device(i);
     472             : 
     473         165 :         iter->i = i;
     474         165 :         iter->cpl(nvme_ctrlr, iter->ctx, status);
     475             : 
     476         165 :         free(iter);
     477         165 : }
     478             : 
     479             : void
     480         165 : nvme_ctrlr_for_each_channel(struct nvme_ctrlr *nvme_ctrlr,
     481             :                             nvme_ctrlr_for_each_channel_msg fn, void *ctx,
     482             :                             nvme_ctrlr_for_each_channel_done cpl)
     483             : {
     484             :         struct nvme_ctrlr_channel_iter *iter;
     485             : 
     486         165 :         assert(nvme_ctrlr != NULL && fn != NULL);
     487             : 
     488         165 :         iter = calloc(1, sizeof(struct nvme_ctrlr_channel_iter));
     489         165 :         if (iter == NULL) {
     490           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
     491           0 :                 assert(false);
     492             :                 return;
     493             :         }
     494             : 
     495         165 :         iter->fn = fn;
     496         165 :         iter->cpl = cpl;
     497         165 :         iter->ctx = ctx;
     498             : 
     499         330 :         spdk_for_each_channel(nvme_ctrlr, nvme_ctrlr_each_channel_msg,
     500         165 :                               iter, nvme_ctrlr_each_channel_cpl);
     501         165 : }
     502             : 
     503             : struct nvme_bdev_channel_iter {
     504             :         nvme_bdev_for_each_channel_msg fn;
     505             :         nvme_bdev_for_each_channel_done cpl;
     506             :         struct spdk_io_channel_iter *i;
     507             :         void *ctx;
     508             : };
     509             : 
     510             : void
     511          67 : nvme_bdev_for_each_channel_continue(struct nvme_bdev_channel_iter *iter, int status)
     512             : {
     513          67 :         spdk_for_each_channel_continue(iter->i, status);
     514          67 : }
     515             : 
     516             : static void
     517          67 : nvme_bdev_each_channel_msg(struct spdk_io_channel_iter *i)
     518             : {
     519          67 :         struct nvme_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     520          67 :         struct nvme_bdev *nbdev = spdk_io_channel_iter_get_io_device(i);
     521          67 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
     522          67 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
     523             : 
     524          67 :         iter->i = i;
     525          67 :         iter->fn(iter, nbdev, nbdev_ch, iter->ctx);
     526          67 : }
     527             : 
     528             : static void
     529          59 : nvme_bdev_each_channel_cpl(struct spdk_io_channel_iter *i, int status)
     530             : {
     531          59 :         struct nvme_bdev_channel_iter *iter = spdk_io_channel_iter_get_ctx(i);
     532          59 :         struct nvme_bdev *nbdev = spdk_io_channel_iter_get_io_device(i);
     533             : 
     534          59 :         iter->i = i;
     535          59 :         iter->cpl(nbdev, iter->ctx, status);
     536             : 
     537          59 :         free(iter);
     538          59 : }
     539             : 
     540             : void
     541          59 : nvme_bdev_for_each_channel(struct nvme_bdev *nbdev,
     542             :                            nvme_bdev_for_each_channel_msg fn, void *ctx,
     543             :                            nvme_bdev_for_each_channel_done cpl)
     544             : {
     545             :         struct nvme_bdev_channel_iter *iter;
     546             : 
     547          59 :         assert(nbdev != NULL && fn != NULL);
     548             : 
     549          59 :         iter = calloc(1, sizeof(struct nvme_bdev_channel_iter));
     550          59 :         if (iter == NULL) {
     551           0 :                 SPDK_ERRLOG("Unable to allocate iterator\n");
     552           0 :                 assert(false);
     553             :                 return;
     554             :         }
     555             : 
     556          59 :         iter->fn = fn;
     557          59 :         iter->cpl = cpl;
     558          59 :         iter->ctx = ctx;
     559             : 
     560          59 :         spdk_for_each_channel(nbdev, nvme_bdev_each_channel_msg, iter,
     561             :                               nvme_bdev_each_channel_cpl);
     562          59 : }
     563             : 
     564             : void
     565           0 : nvme_bdev_dump_trid_json(const struct spdk_nvme_transport_id *trid, struct spdk_json_write_ctx *w)
     566             : {
     567             :         const char *trtype_str;
     568             :         const char *adrfam_str;
     569             : 
     570           0 :         trtype_str = spdk_nvme_transport_id_trtype_str(trid->trtype);
     571           0 :         if (trtype_str) {
     572           0 :                 spdk_json_write_named_string(w, "trtype", trtype_str);
     573           0 :         }
     574             : 
     575           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
     576           0 :         if (adrfam_str) {
     577           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
     578           0 :         }
     579             : 
     580           0 :         if (trid->traddr[0] != '\0') {
     581           0 :                 spdk_json_write_named_string(w, "traddr", trid->traddr);
     582           0 :         }
     583             : 
     584           0 :         if (trid->trsvcid[0] != '\0') {
     585           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
     586           0 :         }
     587             : 
     588           0 :         if (trid->subnqn[0] != '\0') {
     589           0 :                 spdk_json_write_named_string(w, "subnqn", trid->subnqn);
     590           0 :         }
     591           0 : }
     592             : 
     593             : static void
     594          60 : nvme_bdev_ctrlr_delete(struct nvme_bdev_ctrlr *nbdev_ctrlr,
     595             :                        struct nvme_ctrlr *nvme_ctrlr)
     596             : {
     597             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_delete, nvme_ctrlr->nbdev_ctrlr->name);
     598          60 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     599             : 
     600          60 :         TAILQ_REMOVE(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
     601          60 :         if (!TAILQ_EMPTY(&nbdev_ctrlr->ctrlrs)) {
     602          15 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     603             : 
     604          15 :                 return;
     605             :         }
     606          45 :         TAILQ_REMOVE(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
     607             : 
     608          45 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     609             : 
     610          45 :         assert(TAILQ_EMPTY(&nbdev_ctrlr->bdevs));
     611             : 
     612          45 :         free(nbdev_ctrlr->name);
     613          45 :         free(nbdev_ctrlr);
     614          60 : }
     615             : 
     616             : static void
     617          61 : _nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     618             : {
     619             :         struct nvme_path_id *path_id, *tmp_path;
     620             :         struct nvme_ns *ns, *tmp_ns;
     621             : 
     622          61 :         free(nvme_ctrlr->copied_ana_desc);
     623          61 :         spdk_free(nvme_ctrlr->ana_log_page);
     624             : 
     625          61 :         if (nvme_ctrlr->opal_dev) {
     626           0 :                 spdk_opal_dev_destruct(nvme_ctrlr->opal_dev);
     627           0 :                 nvme_ctrlr->opal_dev = NULL;
     628           0 :         }
     629             : 
     630          61 :         if (nvme_ctrlr->nbdev_ctrlr) {
     631          60 :                 nvme_bdev_ctrlr_delete(nvme_ctrlr->nbdev_ctrlr, nvme_ctrlr);
     632          60 :         }
     633             : 
     634          61 :         RB_FOREACH_SAFE(ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp_ns) {
     635           0 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, ns);
     636           0 :                 nvme_ns_free(ns);
     637           0 :         }
     638             : 
     639         122 :         TAILQ_FOREACH_SAFE(path_id, &nvme_ctrlr->trids, link, tmp_path) {
     640          61 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
     641          61 :                 free(path_id);
     642          61 :         }
     643             : 
     644          61 :         pthread_mutex_destroy(&nvme_ctrlr->mutex);
     645          61 :         spdk_keyring_put_key(nvme_ctrlr->psk);
     646          61 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_key);
     647          61 :         spdk_keyring_put_key(nvme_ctrlr->dhchap_ctrlr_key);
     648          61 :         free(nvme_ctrlr);
     649             : 
     650          61 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
     651          61 :         if (g_bdev_nvme_module_finish && TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
     652           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
     653           0 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
     654           0 :                 spdk_bdev_module_fini_done();
     655           0 :                 return;
     656             :         }
     657          61 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
     658          61 : }
     659             : 
     660             : static int
     661          61 : nvme_detach_poller(void *arg)
     662             : {
     663          61 :         struct nvme_ctrlr *nvme_ctrlr = arg;
     664             :         int rc;
     665             : 
     666          61 :         rc = spdk_nvme_detach_poll_async(nvme_ctrlr->detach_ctx);
     667          61 :         if (rc != -EAGAIN) {
     668          61 :                 spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     669          61 :                 _nvme_ctrlr_delete(nvme_ctrlr);
     670          61 :         }
     671             : 
     672          61 :         return SPDK_POLLER_BUSY;
     673             : }
     674             : 
     675             : static void
     676          61 : nvme_ctrlr_delete(struct nvme_ctrlr *nvme_ctrlr)
     677             : {
     678             :         int rc;
     679             : 
     680          61 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
     681             : 
     682          61 :         if (spdk_interrupt_mode_is_enabled()) {
     683           0 :                 spdk_interrupt_unregister(&nvme_ctrlr->intr);
     684           0 :         }
     685             : 
     686             :         /* First, unregister the adminq poller, as the driver will poll adminq if necessary */
     687          61 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
     688             : 
     689             :         /* If we got here, the reset/detach poller cannot be active */
     690          61 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
     691          61 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(nvme_detach_poller,
     692             :                                           nvme_ctrlr, 1000);
     693          61 :         if (nvme_ctrlr->reset_detach_poller == NULL) {
     694           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to register detach poller\n");
     695           0 :                 goto error;
     696             :         }
     697             : 
     698          61 :         rc = spdk_nvme_detach_async(nvme_ctrlr->ctrlr, &nvme_ctrlr->detach_ctx);
     699          61 :         if (rc != 0) {
     700           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to detach the NVMe controller\n");
     701           0 :                 goto error;
     702             :         }
     703             : 
     704          61 :         return;
     705             : error:
     706             :         /* We don't have a good way to handle errors here, so just do what we can and delete the
     707             :          * controller without detaching the underlying NVMe device.
     708             :          */
     709           0 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
     710           0 :         _nvme_ctrlr_delete(nvme_ctrlr);
     711          61 : }
     712             : 
     713             : static void
     714          60 : nvme_ctrlr_unregister_cb(void *io_device)
     715             : {
     716          60 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
     717             : 
     718          60 :         nvme_ctrlr_delete(nvme_ctrlr);
     719          60 : }
     720             : 
     721             : static void
     722          60 : nvme_ctrlr_unregister(void *ctx)
     723             : {
     724          60 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
     725             : 
     726          60 :         spdk_io_device_unregister(nvme_ctrlr, nvme_ctrlr_unregister_cb);
     727          60 : }
     728             : 
     729             : static bool
     730         244 : nvme_ctrlr_can_be_unregistered(struct nvme_ctrlr *nvme_ctrlr)
     731             : {
     732         244 :         if (!nvme_ctrlr->destruct) {
     733         128 :                 return false;
     734             :         }
     735             : 
     736         116 :         if (nvme_ctrlr->ref > 0) {
     737          56 :                 return false;
     738             :         }
     739             : 
     740          60 :         if (nvme_ctrlr->resetting) {
     741           0 :                 return false;
     742             :         }
     743             : 
     744          60 :         if (nvme_ctrlr->ana_log_page_updating) {
     745           0 :                 return false;
     746             :         }
     747             : 
     748          60 :         if (nvme_ctrlr->io_path_cache_clearing) {
     749           0 :                 return false;
     750             :         }
     751             : 
     752          60 :         return true;
     753         244 : }
     754             : 
     755             : static void
     756         168 : nvme_ctrlr_release(struct nvme_ctrlr *nvme_ctrlr)
     757             : {
     758         168 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
     759             :         SPDK_DTRACE_PROBE2(bdev_nvme_ctrlr_release, nvme_ctrlr->nbdev_ctrlr->name, nvme_ctrlr->ref);
     760             : 
     761         168 :         assert(nvme_ctrlr->ref > 0);
     762         168 :         nvme_ctrlr->ref--;
     763             : 
     764         168 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
     765         108 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
     766         108 :                 return;
     767             :         }
     768             : 
     769          60 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
     770             : 
     771          60 :         spdk_thread_exec_msg(nvme_ctrlr->thread, nvme_ctrlr_unregister, nvme_ctrlr);
     772         168 : }
     773             : 
     774             : static void
     775         251 : bdev_nvme_clear_current_io_path(struct nvme_bdev_channel *nbdev_ch)
     776             : {
     777         251 :         nbdev_ch->current_io_path = NULL;
     778         251 :         nbdev_ch->rr_counter = 0;
     779         251 : }
     780             : 
     781             : static struct nvme_io_path *
     782           8 : _bdev_nvme_get_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     783             : {
     784             :         struct nvme_io_path *io_path;
     785             : 
     786          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
     787          15 :                 if (io_path->nvme_ns == nvme_ns) {
     788           7 :                         break;
     789             :                 }
     790           8 :         }
     791             : 
     792           8 :         return io_path;
     793             : }
     794             : 
     795             : static struct nvme_io_path *
     796          37 : nvme_io_path_alloc(void)
     797             : {
     798             :         struct nvme_io_path *io_path;
     799             : 
     800          37 :         io_path = calloc(1, sizeof(*io_path));
     801          37 :         if (io_path == NULL) {
     802           0 :                 SPDK_ERRLOG("Failed to alloc io_path.\n");
     803           0 :                 return NULL;
     804             :         }
     805             : 
     806          37 :         if (g_opts.io_path_stat) {
     807           0 :                 io_path->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
     808           0 :                 if (io_path->stat == NULL) {
     809           0 :                         free(io_path);
     810           0 :                         SPDK_ERRLOG("Failed to alloc io_path stat.\n");
     811           0 :                         return NULL;
     812             :                 }
     813           0 :                 spdk_bdev_reset_io_stat(io_path->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
     814           0 :         }
     815             : 
     816          37 :         return io_path;
     817          37 : }
     818             : 
     819             : static void
     820          37 : nvme_io_path_free(struct nvme_io_path *io_path)
     821             : {
     822          37 :         free(io_path->stat);
     823          37 :         free(io_path);
     824          37 : }
     825             : 
     826             : static int
     827          37 : _bdev_nvme_add_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_ns)
     828             : {
     829             :         struct nvme_io_path *io_path;
     830             :         struct spdk_io_channel *ch;
     831             :         struct nvme_ctrlr_channel *ctrlr_ch;
     832             :         struct nvme_qpair *nvme_qpair;
     833             : 
     834          37 :         io_path = nvme_io_path_alloc();
     835          37 :         if (io_path == NULL) {
     836           0 :                 return -ENOMEM;
     837             :         }
     838             : 
     839          37 :         io_path->nvme_ns = nvme_ns;
     840             : 
     841          37 :         ch = spdk_get_io_channel(nvme_ns->ctrlr);
     842          37 :         if (ch == NULL) {
     843           0 :                 nvme_io_path_free(io_path);
     844           0 :                 SPDK_ERRLOG("Failed to alloc io_channel.\n");
     845           0 :                 return -ENOMEM;
     846             :         }
     847             : 
     848          37 :         ctrlr_ch = spdk_io_channel_get_ctx(ch);
     849             : 
     850          37 :         nvme_qpair = ctrlr_ch->qpair;
     851          37 :         assert(nvme_qpair != NULL);
     852             : 
     853          37 :         io_path->qpair = nvme_qpair;
     854          37 :         TAILQ_INSERT_TAIL(&nvme_qpair->io_path_list, io_path, tailq);
     855             : 
     856          37 :         io_path->nbdev_ch = nbdev_ch;
     857          37 :         STAILQ_INSERT_TAIL(&nbdev_ch->io_path_list, io_path, stailq);
     858             : 
     859          37 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     860             : 
     861          37 :         return 0;
     862          37 : }
     863             : 
     864             : static void
     865          37 : bdev_nvme_clear_retry_io_path(struct nvme_bdev_channel *nbdev_ch,
     866             :                               struct nvme_io_path *io_path)
     867             : {
     868             :         struct nvme_bdev_io *bio;
     869             : 
     870          38 :         TAILQ_FOREACH(bio, &nbdev_ch->retry_io_list, retry_link) {
     871           1 :                 if (bio->io_path == io_path) {
     872           1 :                         bio->io_path = NULL;
     873           1 :                 }
     874           1 :         }
     875          37 : }
     876             : 
     877             : static void
     878          37 : _bdev_nvme_delete_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *io_path)
     879             : {
     880             :         struct spdk_io_channel *ch;
     881             :         struct nvme_qpair *nvme_qpair;
     882             :         struct nvme_ctrlr_channel *ctrlr_ch;
     883             :         struct nvme_bdev *nbdev;
     884             : 
     885          37 :         nbdev = spdk_io_channel_get_io_device(spdk_io_channel_from_ctx(nbdev_ch));
     886             : 
     887             :         /* Add the statistics to nvme_ns before this path is destroyed. */
     888          37 :         pthread_mutex_lock(&nbdev->mutex);
     889          37 :         if (nbdev->ref != 0 && io_path->nvme_ns->stat != NULL && io_path->stat != NULL) {
     890           0 :                 spdk_bdev_add_io_stat(io_path->nvme_ns->stat, io_path->stat);
     891           0 :         }
     892          37 :         pthread_mutex_unlock(&nbdev->mutex);
     893             : 
     894          37 :         bdev_nvme_clear_current_io_path(nbdev_ch);
     895          37 :         bdev_nvme_clear_retry_io_path(nbdev_ch, io_path);
     896             : 
     897          39 :         STAILQ_REMOVE(&nbdev_ch->io_path_list, io_path, nvme_io_path, stailq);
     898          37 :         io_path->nbdev_ch = NULL;
     899             : 
     900          37 :         nvme_qpair = io_path->qpair;
     901          37 :         assert(nvme_qpair != NULL);
     902             : 
     903          37 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
     904          37 :         assert(ctrlr_ch != NULL);
     905             : 
     906          37 :         ch = spdk_io_channel_from_ctx(ctrlr_ch);
     907          37 :         spdk_put_io_channel(ch);
     908             : 
     909             :         /* After an io_path is removed, I/Os submitted to it may complete and update statistics
     910             :          * of the io_path. To avoid heap-use-after-free error from this case, do not free the
     911             :          * io_path here but free the io_path when the associated qpair is freed. It is ensured
     912             :          * that all I/Os submitted to the io_path are completed when the associated qpair is freed.
     913             :          */
     914          37 : }
     915             : 
     916             : static void
     917          24 : _bdev_nvme_delete_io_paths(struct nvme_bdev_channel *nbdev_ch)
     918             : {
     919             :         struct nvme_io_path *io_path, *tmp_io_path;
     920             : 
     921          59 :         STAILQ_FOREACH_SAFE(io_path, &nbdev_ch->io_path_list, stailq, tmp_io_path) {
     922          35 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
     923          35 :         }
     924          24 : }
     925             : 
     926             : static int
     927          24 : bdev_nvme_create_bdev_channel_cb(void *io_device, void *ctx_buf)
     928             : {
     929          24 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     930          24 :         struct nvme_bdev *nbdev = io_device;
     931             :         struct nvme_ns *nvme_ns;
     932             :         int rc;
     933             : 
     934          24 :         STAILQ_INIT(&nbdev_ch->io_path_list);
     935          24 :         TAILQ_INIT(&nbdev_ch->retry_io_list);
     936             : 
     937          24 :         pthread_mutex_lock(&nbdev->mutex);
     938             : 
     939          24 :         nbdev_ch->mp_policy = nbdev->mp_policy;
     940          24 :         nbdev_ch->mp_selector = nbdev->mp_selector;
     941          24 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
     942             : 
     943          59 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
     944          35 :                 rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
     945          35 :                 if (rc != 0) {
     946           0 :                         pthread_mutex_unlock(&nbdev->mutex);
     947             : 
     948           0 :                         _bdev_nvme_delete_io_paths(nbdev_ch);
     949           0 :                         return rc;
     950             :                 }
     951          35 :         }
     952          24 :         pthread_mutex_unlock(&nbdev->mutex);
     953             : 
     954          24 :         return 0;
     955          24 : }
     956             : 
     957             : /* If cpl != NULL, complete the bdev_io with nvme status based on 'cpl'.
     958             :  * If cpl == NULL, complete the bdev_io with bdev status based on 'status'.
     959             :  */
     960             : static inline void
     961          57 : __bdev_nvme_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status,
     962             :                         const struct spdk_nvme_cpl *cpl)
     963             : {
     964          57 :         spdk_trace_record(TRACE_BDEV_NVME_IO_DONE, 0, 0, (uintptr_t)bdev_io->driver_ctx,
     965             :                           (uintptr_t)bdev_io);
     966          57 :         if (cpl) {
     967          29 :                 spdk_bdev_io_complete_nvme_status(bdev_io, cpl->cdw0, cpl->status.sct, cpl->status.sc);
     968          29 :         } else {
     969          28 :                 spdk_bdev_io_complete(bdev_io, status);
     970             :         }
     971          57 : }
     972             : 
     973             : static void bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch);
     974             : 
     975             : static void
     976          24 : bdev_nvme_destroy_bdev_channel_cb(void *io_device, void *ctx_buf)
     977             : {
     978          24 :         struct nvme_bdev_channel *nbdev_ch = ctx_buf;
     979             : 
     980          24 :         bdev_nvme_abort_retry_ios(nbdev_ch);
     981          24 :         _bdev_nvme_delete_io_paths(nbdev_ch);
     982          24 : }
     983             : 
     984             : static inline bool
     985          62 : bdev_nvme_io_type_is_admin(enum spdk_bdev_io_type io_type)
     986             : {
     987          62 :         switch (io_type) {
     988             :         case SPDK_BDEV_IO_TYPE_RESET:
     989             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
     990             :         case SPDK_BDEV_IO_TYPE_ABORT:
     991           5 :                 return true;
     992             :         default:
     993          57 :                 break;
     994             :         }
     995             : 
     996          57 :         return false;
     997          62 : }
     998             : 
     999             : static inline bool
    1000          98 : nvme_ns_is_active(struct nvme_ns *nvme_ns)
    1001             : {
    1002          98 :         if (spdk_unlikely(nvme_ns->ana_state_updating)) {
    1003           1 :                 return false;
    1004             :         }
    1005             : 
    1006          97 :         if (spdk_unlikely(nvme_ns->ns == NULL)) {
    1007           0 :                 return false;
    1008             :         }
    1009             : 
    1010          97 :         return true;
    1011          98 : }
    1012             : 
    1013             : static inline bool
    1014          86 : nvme_ns_is_accessible(struct nvme_ns *nvme_ns)
    1015             : {
    1016          86 :         if (spdk_unlikely(!nvme_ns_is_active(nvme_ns))) {
    1017           1 :                 return false;
    1018             :         }
    1019             : 
    1020          85 :         switch (nvme_ns->ana_state) {
    1021             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1022             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1023          76 :                 return true;
    1024             :         default:
    1025           9 :                 break;
    1026             :         }
    1027             : 
    1028           9 :         return false;
    1029          86 : }
    1030             : 
    1031             : static inline bool
    1032         128 : nvme_qpair_is_connected(struct nvme_qpair *nvme_qpair)
    1033             : {
    1034         128 :         if (spdk_unlikely(nvme_qpair->qpair == NULL)) {
    1035          23 :                 return false;
    1036             :         }
    1037             : 
    1038         105 :         if (spdk_unlikely(spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
    1039             :                           SPDK_NVME_QPAIR_FAILURE_NONE)) {
    1040           2 :                 return false;
    1041             :         }
    1042             : 
    1043         103 :         if (spdk_unlikely(nvme_qpair->ctrlr_ch->reset_iter != NULL)) {
    1044           0 :                 return false;
    1045             :         }
    1046             : 
    1047         103 :         return true;
    1048         128 : }
    1049             : 
    1050             : static inline bool
    1051         102 : nvme_io_path_is_available(struct nvme_io_path *io_path)
    1052             : {
    1053         102 :         if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
    1054          16 :                 return false;
    1055             :         }
    1056             : 
    1057          86 :         if (spdk_unlikely(!nvme_ns_is_accessible(io_path->nvme_ns))) {
    1058          10 :                 return false;
    1059             :         }
    1060             : 
    1061          76 :         return true;
    1062         102 : }
    1063             : 
    1064             : static inline bool
    1065           9 : nvme_ctrlr_is_failed(struct nvme_ctrlr *nvme_ctrlr)
    1066             : {
    1067           9 :         if (nvme_ctrlr->destruct) {
    1068           0 :                 return true;
    1069             :         }
    1070             : 
    1071           9 :         if (nvme_ctrlr->fast_io_fail_timedout) {
    1072           2 :                 return true;
    1073             :         }
    1074             : 
    1075           7 :         if (nvme_ctrlr->resetting) {
    1076           5 :                 if (nvme_ctrlr->opts.reconnect_delay_sec != 0) {
    1077           5 :                         return false;
    1078             :                 } else {
    1079           0 :                         return true;
    1080             :                 }
    1081             :         }
    1082             : 
    1083           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
    1084           2 :                 return false;
    1085             :         }
    1086             : 
    1087           0 :         if (nvme_ctrlr->disabled) {
    1088           0 :                 return true;
    1089             :         }
    1090             : 
    1091           0 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    1092           0 :                 return true;
    1093             :         } else {
    1094           0 :                 return false;
    1095             :         }
    1096           9 : }
    1097             : 
    1098             : static bool
    1099          20 : nvme_ctrlr_is_available(struct nvme_ctrlr *nvme_ctrlr)
    1100             : {
    1101          20 :         if (nvme_ctrlr->destruct) {
    1102           0 :                 return false;
    1103             :         }
    1104             : 
    1105          20 :         if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    1106           3 :                 return false;
    1107             :         }
    1108             : 
    1109          17 :         if (nvme_ctrlr->resetting || nvme_ctrlr->reconnect_is_delayed) {
    1110           1 :                 return false;
    1111             :         }
    1112             : 
    1113          16 :         if (nvme_ctrlr->disabled) {
    1114           0 :                 return false;
    1115             :         }
    1116             : 
    1117          16 :         return true;
    1118          20 : }
    1119             : 
    1120             : /* Simulate circular linked list. */
    1121             : static inline struct nvme_io_path *
    1122          99 : nvme_io_path_get_next(struct nvme_bdev_channel *nbdev_ch, struct nvme_io_path *prev_path)
    1123             : {
    1124             :         struct nvme_io_path *next_path;
    1125             : 
    1126          99 :         if (prev_path != NULL) {
    1127          39 :                 next_path = STAILQ_NEXT(prev_path, stailq);
    1128          39 :                 if (next_path != NULL) {
    1129          14 :                         return next_path;
    1130             :                 }
    1131          25 :         }
    1132             : 
    1133          85 :         return STAILQ_FIRST(&nbdev_ch->io_path_list);
    1134          99 : }
    1135             : 
    1136             : static struct nvme_io_path *
    1137          67 : _bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
    1138             : {
    1139          67 :         struct nvme_io_path *io_path, *start, *non_optimized = NULL;
    1140             : 
    1141          67 :         start = nvme_io_path_get_next(nbdev_ch, nbdev_ch->current_io_path);
    1142             : 
    1143          67 :         io_path = start;
    1144          67 :         do {
    1145          79 :                 if (spdk_likely(nvme_io_path_is_available(io_path))) {
    1146          57 :                         switch (io_path->nvme_ns->ana_state) {
    1147             :                         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1148          47 :                                 nbdev_ch->current_io_path = io_path;
    1149          47 :                                 return io_path;
    1150             :                         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1151          10 :                                 if (non_optimized == NULL) {
    1152           7 :                                         non_optimized = io_path;
    1153           7 :                                 }
    1154          10 :                                 break;
    1155             :                         default:
    1156           0 :                                 assert(false);
    1157             :                                 break;
    1158             :                         }
    1159          10 :                 }
    1160          32 :                 io_path = nvme_io_path_get_next(nbdev_ch, io_path);
    1161          32 :         } while (io_path != start);
    1162             : 
    1163          20 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    1164             :                 /* We come here only if there is no optimized path. Cache even non_optimized
    1165             :                  * path for load balance across multiple non_optimized paths.
    1166             :                  */
    1167           1 :                 nbdev_ch->current_io_path = non_optimized;
    1168           1 :         }
    1169             : 
    1170          20 :         return non_optimized;
    1171          67 : }
    1172             : 
    1173             : static struct nvme_io_path *
    1174           4 : _bdev_nvme_find_io_path_min_qd(struct nvme_bdev_channel *nbdev_ch)
    1175             : {
    1176             :         struct nvme_io_path *io_path;
    1177           4 :         struct nvme_io_path *optimized = NULL, *non_optimized = NULL;
    1178           4 :         uint32_t opt_min_qd = UINT32_MAX, non_opt_min_qd = UINT32_MAX;
    1179             :         uint32_t num_outstanding_reqs;
    1180             : 
    1181          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1182          12 :                 if (spdk_unlikely(!nvme_qpair_is_connected(io_path->qpair))) {
    1183             :                         /* The device is currently resetting. */
    1184           0 :                         continue;
    1185             :                 }
    1186             : 
    1187          12 :                 if (spdk_unlikely(!nvme_ns_is_active(io_path->nvme_ns))) {
    1188           0 :                         continue;
    1189             :                 }
    1190             : 
    1191          12 :                 num_outstanding_reqs = spdk_nvme_qpair_get_num_outstanding_reqs(io_path->qpair->qpair);
    1192          12 :                 switch (io_path->nvme_ns->ana_state) {
    1193             :                 case SPDK_NVME_ANA_OPTIMIZED_STATE:
    1194           6 :                         if (num_outstanding_reqs < opt_min_qd) {
    1195           5 :                                 opt_min_qd = num_outstanding_reqs;
    1196           5 :                                 optimized = io_path;
    1197           5 :                         }
    1198           6 :                         break;
    1199             :                 case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    1200           3 :                         if (num_outstanding_reqs < non_opt_min_qd) {
    1201           3 :                                 non_opt_min_qd = num_outstanding_reqs;
    1202           3 :                                 non_optimized = io_path;
    1203           3 :                         }
    1204           3 :                         break;
    1205             :                 default:
    1206           3 :                         break;
    1207             :                 }
    1208          12 :         }
    1209             : 
    1210             :         /* don't cache io path for BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH selector */
    1211           4 :         if (optimized != NULL) {
    1212           3 :                 return optimized;
    1213             :         }
    1214             : 
    1215           1 :         return non_optimized;
    1216           4 : }
    1217             : 
    1218             : static inline struct nvme_io_path *
    1219         105 : bdev_nvme_find_io_path(struct nvme_bdev_channel *nbdev_ch)
    1220             : {
    1221         105 :         if (spdk_likely(nbdev_ch->current_io_path != NULL)) {
    1222          41 :                 if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE) {
    1223          31 :                         return nbdev_ch->current_io_path;
    1224          10 :                 } else if (nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1225          10 :                         if (++nbdev_ch->rr_counter < nbdev_ch->rr_min_io) {
    1226           3 :                                 return nbdev_ch->current_io_path;
    1227             :                         }
    1228           7 :                         nbdev_ch->rr_counter = 0;
    1229           7 :                 }
    1230           7 :         }
    1231             : 
    1232          71 :         if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE ||
    1233          14 :             nbdev_ch->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    1234          67 :                 return _bdev_nvme_find_io_path(nbdev_ch);
    1235             :         } else {
    1236           4 :                 return _bdev_nvme_find_io_path_min_qd(nbdev_ch);
    1237             :         }
    1238         105 : }
    1239             : 
    1240             : /* Return true if there is any io_path whose qpair is active or ctrlr is not failed,
    1241             :  * or false otherwise.
    1242             :  *
    1243             :  * If any io_path has an active qpair but find_io_path() returned NULL, its namespace
    1244             :  * is likely to be non-accessible now but may become accessible.
    1245             :  *
    1246             :  * If any io_path has an unfailed ctrlr but find_io_path() returned NULL, the ctrlr
    1247             :  * is likely to be resetting now but the reset may succeed. A ctrlr is set to unfailed
    1248             :  * when starting to reset it but it is set to failed when the reset failed. Hence, if
    1249             :  * a ctrlr is unfailed, it is likely that it works fine or is resetting.
    1250             :  */
    1251             : static bool
    1252          15 : any_io_path_may_become_available(struct nvme_bdev_channel *nbdev_ch)
    1253             : {
    1254             :         struct nvme_io_path *io_path;
    1255             : 
    1256          15 :         if (nbdev_ch->resetting) {
    1257           1 :                 return false;
    1258             :         }
    1259             : 
    1260          16 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    1261          14 :                 if (io_path->nvme_ns->ana_transition_timedout) {
    1262           0 :                         continue;
    1263             :                 }
    1264             : 
    1265          14 :                 if (nvme_qpair_is_connected(io_path->qpair) ||
    1266           9 :                     !nvme_ctrlr_is_failed(io_path->qpair->ctrlr)) {
    1267          12 :                         return true;
    1268             :                 }
    1269           2 :         }
    1270             : 
    1271           2 :         return false;
    1272          15 : }
    1273             : 
    1274             : static void
    1275          14 : bdev_nvme_retry_io(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    1276             : {
    1277          14 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    1278             :         struct spdk_io_channel *ch;
    1279             : 
    1280          14 :         if (nbdev_io->io_path != NULL && nvme_io_path_is_available(nbdev_io->io_path)) {
    1281           3 :                 _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    1282           3 :         } else {
    1283          11 :                 ch = spdk_io_channel_from_ctx(nbdev_ch);
    1284          11 :                 bdev_nvme_submit_request(ch, bdev_io);
    1285             :         }
    1286          14 : }
    1287             : 
    1288             : static int
    1289          14 : bdev_nvme_retry_ios(void *arg)
    1290             : {
    1291          14 :         struct nvme_bdev_channel *nbdev_ch = arg;
    1292             :         struct nvme_bdev_io *bio, *tmp_bio;
    1293             :         uint64_t now, delay_us;
    1294             : 
    1295          14 :         now = spdk_get_ticks();
    1296             : 
    1297          28 :         TAILQ_FOREACH_SAFE(bio, &nbdev_ch->retry_io_list, retry_link, tmp_bio) {
    1298          15 :                 if (bio->retry_ticks > now) {
    1299           1 :                         break;
    1300             :                 }
    1301             : 
    1302          14 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1303             : 
    1304          14 :                 bdev_nvme_retry_io(nbdev_ch, spdk_bdev_io_from_ctx(bio));
    1305          14 :         }
    1306             : 
    1307          14 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1308             : 
    1309          14 :         bio = TAILQ_FIRST(&nbdev_ch->retry_io_list);
    1310          14 :         if (bio != NULL) {
    1311           4 :                 delay_us = (bio->retry_ticks - now) * SPDK_SEC_TO_USEC / spdk_get_ticks_hz();
    1312             : 
    1313           4 :                 nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1314             :                                             delay_us);
    1315           4 :         }
    1316             : 
    1317          14 :         return SPDK_POLLER_BUSY;
    1318             : }
    1319             : 
    1320             : static void
    1321          16 : bdev_nvme_queue_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1322             :                          struct nvme_bdev_io *bio, uint64_t delay_ms)
    1323             : {
    1324             :         struct nvme_bdev_io *tmp_bio;
    1325             : 
    1326          16 :         bio->retry_ticks = spdk_get_ticks() + delay_ms * spdk_get_ticks_hz() / 1000ULL;
    1327             : 
    1328          16 :         TAILQ_FOREACH_REVERSE(tmp_bio, &nbdev_ch->retry_io_list, retry_io_head, retry_link) {
    1329           1 :                 if (tmp_bio->retry_ticks <= bio->retry_ticks) {
    1330           1 :                         TAILQ_INSERT_AFTER(&nbdev_ch->retry_io_list, tmp_bio, bio,
    1331             :                                            retry_link);
    1332           1 :                         return;
    1333             :                 }
    1334           0 :         }
    1335             : 
    1336             :         /* No earlier I/Os were found. This I/O must be the new head. */
    1337          15 :         TAILQ_INSERT_HEAD(&nbdev_ch->retry_io_list, bio, retry_link);
    1338             : 
    1339          15 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1340             : 
    1341          15 :         nbdev_ch->retry_io_poller = SPDK_POLLER_REGISTER(bdev_nvme_retry_ios, nbdev_ch,
    1342             :                                     delay_ms * 1000ULL);
    1343          16 : }
    1344             : 
    1345             : static void
    1346          54 : bdev_nvme_abort_retry_ios(struct nvme_bdev_channel *nbdev_ch)
    1347             : {
    1348             :         struct nvme_bdev_io *bio, *tmp_bio;
    1349             : 
    1350          55 :         TAILQ_FOREACH_SAFE(bio, &nbdev_ch->retry_io_list, retry_link, tmp_bio) {
    1351           1 :                 TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1352           1 :                 __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1353           1 :         }
    1354             : 
    1355          54 :         spdk_poller_unregister(&nbdev_ch->retry_io_poller);
    1356          54 : }
    1357             : 
    1358             : static int
    1359           6 : bdev_nvme_abort_retry_io(struct nvme_bdev_channel *nbdev_ch,
    1360             :                          struct nvme_bdev_io *bio_to_abort)
    1361             : {
    1362             :         struct nvme_bdev_io *bio;
    1363             : 
    1364           6 :         TAILQ_FOREACH(bio, &nbdev_ch->retry_io_list, retry_link) {
    1365           1 :                 if (bio == bio_to_abort) {
    1366           1 :                         TAILQ_REMOVE(&nbdev_ch->retry_io_list, bio, retry_link);
    1367           1 :                         __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), SPDK_BDEV_IO_STATUS_ABORTED, NULL);
    1368           1 :                         return 0;
    1369             :                 }
    1370           0 :         }
    1371             : 
    1372           5 :         return -ENOENT;
    1373           6 : }
    1374             : 
    1375             : static void
    1376          12 : bdev_nvme_update_nvme_error_stat(struct spdk_bdev_io *bdev_io, const struct spdk_nvme_cpl *cpl)
    1377             : {
    1378             :         struct nvme_bdev *nbdev;
    1379             :         uint16_t sct, sc;
    1380             : 
    1381          12 :         assert(spdk_nvme_cpl_is_error(cpl));
    1382             : 
    1383          12 :         nbdev = bdev_io->bdev->ctxt;
    1384             : 
    1385          12 :         if (nbdev->err_stat == NULL) {
    1386          12 :                 return;
    1387             :         }
    1388             : 
    1389           0 :         sct = cpl->status.sct;
    1390           0 :         sc = cpl->status.sc;
    1391             : 
    1392           0 :         pthread_mutex_lock(&nbdev->mutex);
    1393             : 
    1394           0 :         nbdev->err_stat->status_type[sct]++;
    1395           0 :         switch (sct) {
    1396             :         case SPDK_NVME_SCT_GENERIC:
    1397             :         case SPDK_NVME_SCT_COMMAND_SPECIFIC:
    1398             :         case SPDK_NVME_SCT_MEDIA_ERROR:
    1399             :         case SPDK_NVME_SCT_PATH:
    1400           0 :                 nbdev->err_stat->status[sct][sc]++;
    1401           0 :                 break;
    1402             :         default:
    1403           0 :                 break;
    1404             :         }
    1405             : 
    1406           0 :         pthread_mutex_unlock(&nbdev->mutex);
    1407          12 : }
    1408             : 
    1409             : static inline void
    1410          20 : bdev_nvme_update_io_path_stat(struct nvme_bdev_io *bio)
    1411             : {
    1412          20 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1413          20 :         uint64_t num_blocks = bdev_io->u.bdev.num_blocks;
    1414          20 :         uint32_t blocklen = bdev_io->bdev->blocklen;
    1415             :         struct spdk_bdev_io_stat *stat;
    1416             :         uint64_t tsc_diff;
    1417             : 
    1418          20 :         if (bio->io_path->stat == NULL) {
    1419          20 :                 return;
    1420             :         }
    1421             : 
    1422           0 :         tsc_diff = spdk_get_ticks() - bio->submit_tsc;
    1423           0 :         stat = bio->io_path->stat;
    1424             : 
    1425           0 :         switch (bdev_io->type) {
    1426             :         case SPDK_BDEV_IO_TYPE_READ:
    1427           0 :                 stat->bytes_read += num_blocks * blocklen;
    1428           0 :                 stat->num_read_ops++;
    1429           0 :                 stat->read_latency_ticks += tsc_diff;
    1430           0 :                 if (stat->max_read_latency_ticks < tsc_diff) {
    1431           0 :                         stat->max_read_latency_ticks = tsc_diff;
    1432           0 :                 }
    1433           0 :                 if (stat->min_read_latency_ticks > tsc_diff) {
    1434           0 :                         stat->min_read_latency_ticks = tsc_diff;
    1435           0 :                 }
    1436           0 :                 break;
    1437             :         case SPDK_BDEV_IO_TYPE_WRITE:
    1438           0 :                 stat->bytes_written += num_blocks * blocklen;
    1439           0 :                 stat->num_write_ops++;
    1440           0 :                 stat->write_latency_ticks += tsc_diff;
    1441           0 :                 if (stat->max_write_latency_ticks < tsc_diff) {
    1442           0 :                         stat->max_write_latency_ticks = tsc_diff;
    1443           0 :                 }
    1444           0 :                 if (stat->min_write_latency_ticks > tsc_diff) {
    1445           0 :                         stat->min_write_latency_ticks = tsc_diff;
    1446           0 :                 }
    1447           0 :                 break;
    1448             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    1449           0 :                 stat->bytes_unmapped += num_blocks * blocklen;
    1450           0 :                 stat->num_unmap_ops++;
    1451           0 :                 stat->unmap_latency_ticks += tsc_diff;
    1452           0 :                 if (stat->max_unmap_latency_ticks < tsc_diff) {
    1453           0 :                         stat->max_unmap_latency_ticks = tsc_diff;
    1454           0 :                 }
    1455           0 :                 if (stat->min_unmap_latency_ticks > tsc_diff) {
    1456           0 :                         stat->min_unmap_latency_ticks = tsc_diff;
    1457           0 :                 }
    1458           0 :                 break;
    1459             :         case SPDK_BDEV_IO_TYPE_ZCOPY:
    1460             :                 /* Track the data in the start phase only */
    1461           0 :                 if (!bdev_io->u.bdev.zcopy.start) {
    1462           0 :                         break;
    1463             :                 }
    1464           0 :                 if (bdev_io->u.bdev.zcopy.populate) {
    1465           0 :                         stat->bytes_read += num_blocks * blocklen;
    1466           0 :                         stat->num_read_ops++;
    1467           0 :                         stat->read_latency_ticks += tsc_diff;
    1468           0 :                         if (stat->max_read_latency_ticks < tsc_diff) {
    1469           0 :                                 stat->max_read_latency_ticks = tsc_diff;
    1470           0 :                         }
    1471           0 :                         if (stat->min_read_latency_ticks > tsc_diff) {
    1472           0 :                                 stat->min_read_latency_ticks = tsc_diff;
    1473           0 :                         }
    1474           0 :                 } else {
    1475           0 :                         stat->bytes_written += num_blocks * blocklen;
    1476           0 :                         stat->num_write_ops++;
    1477           0 :                         stat->write_latency_ticks += tsc_diff;
    1478           0 :                         if (stat->max_write_latency_ticks < tsc_diff) {
    1479           0 :                                 stat->max_write_latency_ticks = tsc_diff;
    1480           0 :                         }
    1481           0 :                         if (stat->min_write_latency_ticks > tsc_diff) {
    1482           0 :                                 stat->min_write_latency_ticks = tsc_diff;
    1483           0 :                         }
    1484             :                 }
    1485           0 :                 break;
    1486             :         case SPDK_BDEV_IO_TYPE_COPY:
    1487           0 :                 stat->bytes_copied += num_blocks * blocklen;
    1488           0 :                 stat->num_copy_ops++;
    1489           0 :                 stat->copy_latency_ticks += tsc_diff;
    1490           0 :                 if (stat->max_copy_latency_ticks < tsc_diff) {
    1491           0 :                         stat->max_copy_latency_ticks = tsc_diff;
    1492           0 :                 }
    1493           0 :                 if (stat->min_copy_latency_ticks > tsc_diff) {
    1494           0 :                         stat->min_copy_latency_ticks = tsc_diff;
    1495           0 :                 }
    1496           0 :                 break;
    1497             :         default:
    1498           0 :                 break;
    1499             :         }
    1500          20 : }
    1501             : 
    1502             : static bool
    1503          11 : bdev_nvme_check_retry_io(struct nvme_bdev_io *bio,
    1504             :                          const struct spdk_nvme_cpl *cpl,
    1505             :                          struct nvme_bdev_channel *nbdev_ch,
    1506             :                          uint64_t *_delay_ms)
    1507             : {
    1508          11 :         struct nvme_io_path *io_path = bio->io_path;
    1509          11 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    1510             :         const struct spdk_nvme_ctrlr_data *cdata;
    1511             : 
    1512          15 :         if (spdk_nvme_cpl_is_path_error(cpl) ||
    1513           5 :             spdk_nvme_cpl_is_aborted_sq_deletion(cpl) ||
    1514           0 :             !nvme_io_path_is_available(io_path) ||
    1515           4 :             !nvme_ctrlr_is_available(nvme_ctrlr)) {
    1516          15 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    1517          15 :                 bio->io_path = NULL;
    1518          15 :                 if (spdk_nvme_cpl_is_ana_error(cpl)) {
    1519           1 :                         if (nvme_ctrlr_read_ana_log_page(nvme_ctrlr) == 0) {
    1520           1 :                                 io_path->nvme_ns->ana_state_updating = true;
    1521           1 :                         }
    1522           1 :                 }
    1523           3 :                 if (!any_io_path_may_become_available(nbdev_ch)) {
    1524           0 :                         return false;
    1525             :                 }
    1526           3 :                 *_delay_ms = 0;
    1527           3 :         } else {
    1528           4 :                 bio->retry_count++;
    1529             : 
    1530           4 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    1531             : 
    1532           4 :                 if (cpl->status.crd != 0) {
    1533           1 :                         *_delay_ms = cdata->crdt[cpl->status.crd] * 100;
    1534           1 :                 } else {
    1535           3 :                         *_delay_ms = 0;
    1536             :                 }
    1537             :         }
    1538             : 
    1539           7 :         return true;
    1540           7 : }
    1541             : 
    1542             : static inline void
    1543          40 : bdev_nvme_io_complete_nvme_status(struct nvme_bdev_io *bio,
    1544             :                                   const struct spdk_nvme_cpl *cpl)
    1545             : {
    1546          40 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1547             :         struct nvme_bdev_channel *nbdev_ch;
    1548             :         uint64_t delay_ms;
    1549             : 
    1550          40 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1551             : 
    1552          40 :         if (spdk_likely(spdk_nvme_cpl_is_success(cpl))) {
    1553          20 :                 bdev_nvme_update_io_path_stat(bio);
    1554          20 :                 goto complete;
    1555             :         }
    1556             : 
    1557             :         /* Update error counts before deciding if retry is needed.
    1558             :          * Hence, error counts may be more than the number of I/O errors.
    1559             :          */
    1560          20 :         bdev_nvme_update_nvme_error_stat(bdev_io, cpl);
    1561             : 
    1562          27 :         if (cpl->status.dnr != 0 || spdk_nvme_cpl_is_aborted_by_request(cpl) ||
    1563           2 :             (g_opts.bdev_retry_count != -1 && bio->retry_count >= g_opts.bdev_retry_count)) {
    1564          23 :                 goto complete;
    1565             :         }
    1566             : 
    1567             :         /* At this point we don't know whether the sequence was successfully executed or not, so we
    1568             :          * cannot retry the IO */
    1569           7 :         if (bdev_io->u.bdev.accel_sequence != NULL) {
    1570           0 :                 goto complete;
    1571             :         }
    1572             : 
    1573           7 :         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1574             : 
    1575           7 :         if (bdev_nvme_check_retry_io(bio, cpl, nbdev_ch, &delay_ms)) {
    1576           7 :                 bdev_nvme_queue_retry_io(nbdev_ch, bio, delay_ms);
    1577           7 :                 return;
    1578             :         }
    1579             : 
    1580             : complete:
    1581          25 :         bio->retry_count = 0;
    1582          25 :         bio->submit_tsc = 0;
    1583          25 :         bdev_io->u.bdev.accel_sequence = NULL;
    1584          25 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    1585          32 : }
    1586             : 
    1587             : static inline void
    1588          13 : bdev_nvme_io_complete(struct nvme_bdev_io *bio, int rc)
    1589             : {
    1590          13 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1591             :         struct nvme_bdev_channel *nbdev_ch;
    1592             :         enum spdk_bdev_io_status io_status;
    1593             : 
    1594          13 :         assert(!bdev_nvme_io_type_is_admin(bdev_io->type));
    1595             : 
    1596          13 :         switch (rc) {
    1597             :         case 0:
    1598           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1599           1 :                 break;
    1600             :         case -ENOMEM:
    1601           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1602           0 :                 break;
    1603             :         case -ENXIO:
    1604          15 :                 if (g_opts.bdev_retry_count == -1 || bio->retry_count < g_opts.bdev_retry_count) {
    1605          12 :                         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    1606             : 
    1607          12 :                         bdev_nvme_clear_current_io_path(nbdev_ch);
    1608          12 :                         bio->io_path = NULL;
    1609             : 
    1610          12 :                         if (any_io_path_may_become_available(nbdev_ch)) {
    1611           9 :                                 bdev_nvme_queue_retry_io(nbdev_ch, bio, 1000ULL);
    1612           9 :                                 return;
    1613             :                         }
    1614           3 :                 }
    1615             : 
    1616             :         /* fallthrough */
    1617             :         default:
    1618           3 :                 spdk_accel_sequence_abort(bdev_io->u.bdev.accel_sequence);
    1619           3 :                 bdev_io->u.bdev.accel_sequence = NULL;
    1620           3 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1621           3 :                 break;
    1622             :         }
    1623             : 
    1624           4 :         bio->retry_count = 0;
    1625           4 :         bio->submit_tsc = 0;
    1626           4 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1627          13 : }
    1628             : 
    1629             : static inline void
    1630           4 : bdev_nvme_admin_complete(struct nvme_bdev_io *bio, int rc)
    1631             : {
    1632           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    1633             :         enum spdk_bdev_io_status io_status;
    1634             : 
    1635           4 :         switch (rc) {
    1636             :         case 0:
    1637           1 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    1638           1 :                 break;
    1639             :         case -ENOMEM:
    1640           0 :                 io_status = SPDK_BDEV_IO_STATUS_NOMEM;
    1641           0 :                 break;
    1642           1 :         case -ENXIO:
    1643             :         /* fallthrough */
    1644             :         default:
    1645           3 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    1646           3 :                 break;
    1647             :         }
    1648             : 
    1649           4 :         __bdev_nvme_io_complete(bdev_io, io_status, NULL);
    1650           4 : }
    1651             : 
    1652             : static void
    1653           3 : bdev_nvme_clear_io_path_caches_done(struct nvme_ctrlr *nvme_ctrlr,
    1654             :                                     void *ctx, int status)
    1655             : {
    1656           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1657             : 
    1658           3 :         assert(nvme_ctrlr->io_path_cache_clearing == true);
    1659           3 :         nvme_ctrlr->io_path_cache_clearing = false;
    1660             : 
    1661           3 :         if (!nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    1662           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1663           3 :                 return;
    1664             :         }
    1665             : 
    1666           0 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1667             : 
    1668           0 :         nvme_ctrlr_unregister(nvme_ctrlr);
    1669           3 : }
    1670             : 
    1671             : static void
    1672         408 : _bdev_nvme_clear_io_path_cache(struct nvme_qpair *nvme_qpair)
    1673             : {
    1674             :         struct nvme_io_path *io_path;
    1675             : 
    1676         635 :         TAILQ_FOREACH(io_path, &nvme_qpair->io_path_list, tailq) {
    1677         227 :                 if (io_path->nbdev_ch == NULL) {
    1678          68 :                         continue;
    1679             :                 }
    1680         159 :                 bdev_nvme_clear_current_io_path(io_path->nbdev_ch);
    1681         159 :         }
    1682         408 : }
    1683             : 
    1684             : static void
    1685           1 : bdev_nvme_clear_io_path_cache(struct nvme_ctrlr_channel_iter *i,
    1686             :                               struct nvme_ctrlr *nvme_ctrlr,
    1687             :                               struct nvme_ctrlr_channel *ctrlr_ch,
    1688             :                               void *ctx)
    1689             : {
    1690           1 :         assert(ctrlr_ch->qpair != NULL);
    1691             : 
    1692           1 :         _bdev_nvme_clear_io_path_cache(ctrlr_ch->qpair);
    1693             : 
    1694           1 :         nvme_ctrlr_for_each_channel_continue(i, 0);
    1695           1 : }
    1696             : 
    1697             : static void
    1698           3 : bdev_nvme_clear_io_path_caches(struct nvme_ctrlr *nvme_ctrlr)
    1699             : {
    1700           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    1701           3 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    1702           3 :             nvme_ctrlr->io_path_cache_clearing) {
    1703           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1704           0 :                 return;
    1705             :         }
    1706             : 
    1707           3 :         nvme_ctrlr->io_path_cache_clearing = true;
    1708           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    1709             : 
    1710           3 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    1711             :                                     bdev_nvme_clear_io_path_cache,
    1712             :                                     NULL,
    1713             :                                     bdev_nvme_clear_io_path_caches_done);
    1714           3 : }
    1715             : 
    1716             : static struct nvme_qpair *
    1717         117 : nvme_poll_group_get_qpair(struct nvme_poll_group *group, struct spdk_nvme_qpair *qpair)
    1718             : {
    1719             :         struct nvme_qpair *nvme_qpair;
    1720             : 
    1721         134 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1722         134 :                 if (nvme_qpair->qpair == qpair) {
    1723         117 :                         break;
    1724             :                 }
    1725          17 :         }
    1726             : 
    1727         117 :         return nvme_qpair;
    1728             : }
    1729             : 
    1730             : static void nvme_qpair_delete(struct nvme_qpair *nvme_qpair);
    1731             : 
    1732             : static void
    1733         117 : bdev_nvme_disconnected_qpair_cb(struct spdk_nvme_qpair *qpair, void *poll_group_ctx)
    1734             : {
    1735         117 :         struct nvme_poll_group *group = poll_group_ctx;
    1736             :         struct nvme_qpair *nvme_qpair;
    1737             :         struct nvme_ctrlr *nvme_ctrlr;
    1738             :         struct nvme_ctrlr_channel *ctrlr_ch;
    1739             :         int status;
    1740             : 
    1741         117 :         nvme_qpair = nvme_poll_group_get_qpair(group, qpair);
    1742         117 :         if (nvme_qpair == NULL) {
    1743           0 :                 return;
    1744             :         }
    1745             : 
    1746         117 :         if (nvme_qpair->qpair != NULL) {
    1747         117 :                 spdk_nvme_ctrlr_free_io_qpair(nvme_qpair->qpair);
    1748         117 :                 nvme_qpair->qpair = NULL;
    1749         117 :         }
    1750             : 
    1751         117 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1752             : 
    1753         117 :         nvme_ctrlr = nvme_qpair->ctrlr;
    1754         117 :         ctrlr_ch = nvme_qpair->ctrlr_ch;
    1755             : 
    1756         117 :         if (ctrlr_ch != NULL) {
    1757          72 :                 if (ctrlr_ch->reset_iter != NULL) {
    1758             :                         /* We are in a full reset sequence. */
    1759          67 :                         if (ctrlr_ch->connect_poller != NULL) {
    1760             :                                 /* qpair was failed to connect. Abort the reset sequence. */
    1761           0 :                                 NVME_CTRLR_INFOLOG(nvme_ctrlr,
    1762             :                                                    "qpair %p was failed to connect. abort the reset ctrlr sequence.\n",
    1763             :                                                    qpair);
    1764           0 :                                 spdk_poller_unregister(&ctrlr_ch->connect_poller);
    1765           0 :                                 status = -1;
    1766           0 :                         } else {
    1767             :                                 /* qpair was completed to disconnect. Just move to the next ctrlr_channel. */
    1768          67 :                                 NVME_CTRLR_INFOLOG(nvme_ctrlr,
    1769             :                                                    "qpair %p was disconnected and freed in a reset ctrlr sequence.\n",
    1770             :                                                    qpair);
    1771          67 :                                 status = 0;
    1772             :                         }
    1773          67 :                         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, status);
    1774          67 :                         ctrlr_ch->reset_iter = NULL;
    1775          67 :                 } else {
    1776             :                         /* qpair was disconnected unexpectedly. Reset controller for recovery. */
    1777           5 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpair %p was disconnected and freed. reset controller.\n",
    1778             :                                            qpair);
    1779           5 :                         bdev_nvme_failover_ctrlr(nvme_ctrlr);
    1780             :                 }
    1781          72 :         } else {
    1782             :                 /* In this case, ctrlr_channel is already deleted. */
    1783          45 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpair %p was disconnected and freed. delete nvme_qpair.\n",
    1784             :                                    qpair);
    1785          45 :                 nvme_qpair_delete(nvme_qpair);
    1786             :         }
    1787         117 : }
    1788             : 
    1789             : static void
    1790           0 : bdev_nvme_check_io_qpairs(struct nvme_poll_group *group)
    1791             : {
    1792             :         struct nvme_qpair *nvme_qpair;
    1793             : 
    1794           0 :         TAILQ_FOREACH(nvme_qpair, &group->qpair_list, tailq) {
    1795           0 :                 if (nvme_qpair->qpair == NULL || nvme_qpair->ctrlr_ch == NULL) {
    1796           0 :                         continue;
    1797             :                 }
    1798             : 
    1799           0 :                 if (spdk_nvme_qpair_get_failure_reason(nvme_qpair->qpair) !=
    1800             :                     SPDK_NVME_QPAIR_FAILURE_NONE) {
    1801           0 :                         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1802           0 :                 }
    1803           0 :         }
    1804           0 : }
    1805             : 
    1806             : static int
    1807        1470 : bdev_nvme_poll(void *arg)
    1808             : {
    1809        1470 :         struct nvme_poll_group *group = arg;
    1810             :         int64_t num_completions;
    1811             : 
    1812        1470 :         if (group->collect_spin_stat && group->start_ticks == 0) {
    1813           0 :                 group->start_ticks = spdk_get_ticks();
    1814           0 :         }
    1815             : 
    1816        1470 :         num_completions = spdk_nvme_poll_group_process_completions(group->group, 0,
    1817             :                           bdev_nvme_disconnected_qpair_cb);
    1818        1470 :         if (group->collect_spin_stat) {
    1819           0 :                 if (num_completions > 0) {
    1820           0 :                         if (group->end_ticks != 0) {
    1821           0 :                                 group->spin_ticks += (group->end_ticks - group->start_ticks);
    1822           0 :                                 group->end_ticks = 0;
    1823           0 :                         }
    1824           0 :                         group->start_ticks = 0;
    1825           0 :                 } else {
    1826           0 :                         group->end_ticks = spdk_get_ticks();
    1827             :                 }
    1828           0 :         }
    1829             : 
    1830        1470 :         if (spdk_unlikely(num_completions < 0)) {
    1831           0 :                 bdev_nvme_check_io_qpairs(group);
    1832           0 :         }
    1833             : 
    1834        1470 :         return num_completions > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    1835             : }
    1836             : 
    1837             : static int bdev_nvme_poll_adminq(void *arg);
    1838             : 
    1839             : static void
    1840         140 : bdev_nvme_change_adminq_poll_period(struct nvme_ctrlr *nvme_ctrlr, uint64_t new_period_us)
    1841             : {
    1842         140 :         if (spdk_interrupt_mode_is_enabled()) {
    1843           0 :                 return;
    1844             :         }
    1845             : 
    1846         140 :         spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
    1847             : 
    1848         140 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq,
    1849             :                                           nvme_ctrlr, new_period_us);
    1850         140 : }
    1851             : 
    1852             : static int
    1853         187 : bdev_nvme_poll_adminq(void *arg)
    1854             : {
    1855             :         int32_t rc;
    1856         187 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    1857             :         nvme_ctrlr_disconnected_cb disconnected_cb;
    1858             : 
    1859         187 :         assert(nvme_ctrlr != NULL);
    1860             : 
    1861         187 :         rc = spdk_nvme_ctrlr_process_admin_completions(nvme_ctrlr->ctrlr);
    1862         187 :         if (rc < 0) {
    1863          85 :                 disconnected_cb = nvme_ctrlr->disconnected_cb;
    1864          85 :                 nvme_ctrlr->disconnected_cb = NULL;
    1865             : 
    1866          85 :                 if (disconnected_cb != NULL) {
    1867         140 :                         bdev_nvme_change_adminq_poll_period(nvme_ctrlr,
    1868          70 :                                                             g_opts.nvme_adminq_poll_period_us);
    1869          70 :                         disconnected_cb(nvme_ctrlr);
    1870          70 :                 } else {
    1871          15 :                         bdev_nvme_failover_ctrlr(nvme_ctrlr);
    1872             :                 }
    1873         187 :         } else if (spdk_nvme_ctrlr_get_admin_qp_failure_reason(nvme_ctrlr->ctrlr) !=
    1874             :                    SPDK_NVME_QPAIR_FAILURE_NONE) {
    1875           0 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    1876           0 :         }
    1877             : 
    1878         187 :         return rc == 0 ? SPDK_POLLER_IDLE : SPDK_POLLER_BUSY;
    1879             : }
    1880             : 
    1881             : static void
    1882          38 : nvme_bdev_free(void *io_device)
    1883             : {
    1884          38 :         struct nvme_bdev *nvme_disk = io_device;
    1885             : 
    1886          38 :         pthread_mutex_destroy(&nvme_disk->mutex);
    1887          38 :         free(nvme_disk->disk.name);
    1888          38 :         free(nvme_disk->err_stat);
    1889          38 :         free(nvme_disk);
    1890          38 : }
    1891             : 
    1892             : static int
    1893          37 : bdev_nvme_destruct(void *ctx)
    1894             : {
    1895          37 :         struct nvme_bdev *nvme_disk = ctx;
    1896             :         struct nvme_ns *nvme_ns, *tmp_nvme_ns;
    1897             : 
    1898             :         SPDK_DTRACE_PROBE2(bdev_nvme_destruct, nvme_disk->nbdev_ctrlr->name, nvme_disk->nsid);
    1899             : 
    1900          75 :         TAILQ_FOREACH_SAFE(nvme_ns, &nvme_disk->nvme_ns_list, tailq, tmp_nvme_ns) {
    1901          38 :                 pthread_mutex_lock(&nvme_ns->ctrlr->mutex);
    1902             : 
    1903          38 :                 nvme_ns->bdev = NULL;
    1904             : 
    1905          38 :                 assert(nvme_ns->id > 0);
    1906             : 
    1907          38 :                 if (nvme_ctrlr_get_ns(nvme_ns->ctrlr, nvme_ns->id) == NULL) {
    1908           0 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1909             : 
    1910           0 :                         nvme_ctrlr_release(nvme_ns->ctrlr);
    1911           0 :                         nvme_ns_free(nvme_ns);
    1912           0 :                 } else {
    1913          38 :                         pthread_mutex_unlock(&nvme_ns->ctrlr->mutex);
    1914             :                 }
    1915          38 :         }
    1916             : 
    1917          37 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    1918          37 :         TAILQ_REMOVE(&nvme_disk->nbdev_ctrlr->bdevs, nvme_disk, tailq);
    1919          37 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    1920             : 
    1921          37 :         spdk_io_device_unregister(nvme_disk, nvme_bdev_free);
    1922             : 
    1923          37 :         return 0;
    1924             : }
    1925             : 
    1926             : static int
    1927         118 : bdev_nvme_create_qpair(struct nvme_qpair *nvme_qpair)
    1928             : {
    1929             :         struct nvme_ctrlr *nvme_ctrlr;
    1930             :         struct spdk_nvme_io_qpair_opts opts;
    1931             :         struct spdk_nvme_qpair *qpair;
    1932             :         int rc;
    1933             : 
    1934         118 :         nvme_ctrlr = nvme_qpair->ctrlr;
    1935             : 
    1936         118 :         spdk_nvme_ctrlr_get_default_io_qpair_opts(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1937         118 :         opts.create_only = true;
    1938             :         /* In interrupt mode qpairs must be created in sync mode, else it will never be connected.
    1939             :          * delay_cmd_submit must be false as in interrupt mode requests cannot be submitted in
    1940             :          * completion context.
    1941             :          */
    1942         118 :         if (!spdk_interrupt_mode_is_enabled()) {
    1943         118 :                 opts.async_mode = true;
    1944         118 :                 opts.delay_cmd_submit = g_opts.delay_cmd_submit;
    1945         118 :         }
    1946         118 :         opts.io_queue_requests = spdk_max(g_opts.io_queue_requests, opts.io_queue_requests);
    1947         118 :         g_opts.io_queue_requests = opts.io_queue_requests;
    1948             : 
    1949         118 :         qpair = spdk_nvme_ctrlr_alloc_io_qpair(nvme_ctrlr->ctrlr, &opts, sizeof(opts));
    1950         118 :         if (qpair == NULL) {
    1951           0 :                 return -1;
    1952             :         }
    1953             : 
    1954             :         SPDK_DTRACE_PROBE3(bdev_nvme_create_qpair, nvme_ctrlr->nbdev_ctrlr->name,
    1955             :                            spdk_nvme_qpair_get_id(qpair), spdk_thread_get_id(nvme_ctrlr->thread));
    1956             : 
    1957         118 :         assert(nvme_qpair->group != NULL);
    1958             : 
    1959         118 :         rc = spdk_nvme_poll_group_add(nvme_qpair->group->group, qpair);
    1960         118 :         if (rc != 0) {
    1961           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to begin polling on NVMe Channel.\n");
    1962           0 :                 goto err;
    1963             :         }
    1964             : 
    1965         118 :         rc = spdk_nvme_ctrlr_connect_io_qpair(nvme_ctrlr->ctrlr, qpair);
    1966         118 :         if (rc != 0) {
    1967           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to connect I/O qpair.\n");
    1968           0 :                 goto err;
    1969             :         }
    1970             : 
    1971         118 :         nvme_qpair->qpair = qpair;
    1972             : 
    1973         118 :         if (!g_opts.disable_auto_failback) {
    1974          85 :                 _bdev_nvme_clear_io_path_cache(nvme_qpair);
    1975          85 :         }
    1976             : 
    1977         118 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Connecting qpair %p:%u started.\n",
    1978             :                            qpair, spdk_nvme_qpair_get_id(qpair));
    1979             : 
    1980         118 :         return 0;
    1981             : 
    1982             : err:
    1983           0 :         spdk_nvme_ctrlr_free_io_qpair(qpair);
    1984             : 
    1985           0 :         return rc;
    1986         118 : }
    1987             : 
    1988             : static void bdev_nvme_reset_io_continue(void *cb_arg, int rc);
    1989             : 
    1990             : static void
    1991         122 : bdev_nvme_complete_pending_resets(struct nvme_ctrlr_channel_iter *i,
    1992             :                                   struct nvme_ctrlr *nvme_ctrlr,
    1993             :                                   struct nvme_ctrlr_channel *ctrlr_ch,
    1994             :                                   void *ctx)
    1995             : {
    1996         122 :         int rc = 0;
    1997             :         struct nvme_bdev_io *bio;
    1998             : 
    1999         122 :         if (ctx != NULL) {
    2000          59 :                 rc = -1;
    2001          59 :         }
    2002             : 
    2003         133 :         while (!TAILQ_EMPTY(&ctrlr_ch->pending_resets)) {
    2004          11 :                 bio = TAILQ_FIRST(&ctrlr_ch->pending_resets);
    2005          11 :                 TAILQ_REMOVE(&ctrlr_ch->pending_resets, bio, retry_link);
    2006             : 
    2007          11 :                 bdev_nvme_reset_io_continue(bio, rc);
    2008             :         }
    2009             : 
    2010         122 :         nvme_ctrlr_for_each_channel_continue(i, 0);
    2011         122 : }
    2012             : 
    2013             : /* This function marks the current trid as failed by storing the current ticks
    2014             :  * and then sets the next trid to the active trid within a controller if exists.
    2015             :  *
    2016             :  * The purpose of the boolean return value is to request the caller to disconnect
    2017             :  * the current trid now to try connecting the next trid.
    2018             :  */
    2019             : static bool
    2020          61 : bdev_nvme_failover_trid(struct nvme_ctrlr *nvme_ctrlr, bool remove, bool start)
    2021             : {
    2022             :         struct nvme_path_id *path_id, *next_path;
    2023             :         int rc __attribute__((unused));
    2024             : 
    2025          61 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    2026          61 :         assert(path_id);
    2027          61 :         assert(path_id == nvme_ctrlr->active_path_id);
    2028          61 :         next_path = TAILQ_NEXT(path_id, link);
    2029             : 
    2030             :         /* Update the last failed time. It means the trid is failed if its last
    2031             :          * failed time is non-zero.
    2032             :          */
    2033          61 :         path_id->last_failed_tsc = spdk_get_ticks();
    2034             : 
    2035          61 :         if (next_path == NULL) {
    2036             :                 /* There is no alternate trid within a controller. */
    2037          50 :                 return false;
    2038             :         }
    2039             : 
    2040          11 :         if (!start && nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    2041             :                 /* Connect is not retried in a controller reset sequence. Connecting
    2042             :                  * the next trid will be done by the next bdev_nvme_failover_ctrlr() call.
    2043             :                  */
    2044           3 :                 return false;
    2045             :         }
    2046             : 
    2047           8 :         assert(path_id->trid.trtype != SPDK_NVME_TRANSPORT_PCIE);
    2048             : 
    2049           8 :         NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Start failover from %s:%s to %s:%s\n",
    2050             :                              path_id->trid.traddr, path_id->trid.trsvcid,
    2051             :                              next_path->trid.traddr, next_path->trid.trsvcid);
    2052             : 
    2053           8 :         spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    2054           8 :         nvme_ctrlr->active_path_id = next_path;
    2055           8 :         rc = spdk_nvme_ctrlr_set_trid(nvme_ctrlr->ctrlr, &next_path->trid);
    2056           8 :         assert(rc == 0);
    2057           8 :         TAILQ_REMOVE(&nvme_ctrlr->trids, path_id, link);
    2058           8 :         if (!remove) {
    2059             :                 /** Shuffle the old trid to the end of the list and use the new one.
    2060             :                  * Allows for round robin through multiple connections.
    2061             :                  */
    2062           6 :                 TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, path_id, link);
    2063           6 :         } else {
    2064           2 :                 free(path_id);
    2065             :         }
    2066             : 
    2067           8 :         if (start || next_path->last_failed_tsc == 0) {
    2068             :                 /* bdev_nvme_failover_ctrlr() is just called or the next trid is not failed
    2069             :                  * or used yet. Try the next trid now.
    2070             :                  */
    2071           7 :                 return true;
    2072             :         }
    2073             : 
    2074           2 :         if (spdk_get_ticks() > next_path->last_failed_tsc + spdk_get_ticks_hz() *
    2075           1 :             nvme_ctrlr->opts.reconnect_delay_sec) {
    2076             :                 /* Enough backoff passed since the next trid failed. Try the next trid now. */
    2077           0 :                 return true;
    2078             :         }
    2079             : 
    2080             :         /* The next trid will be tried after reconnect_delay_sec seconds. */
    2081           1 :         return false;
    2082          61 : }
    2083             : 
    2084             : static bool
    2085          88 : bdev_nvme_check_ctrlr_loss_timeout(struct nvme_ctrlr *nvme_ctrlr)
    2086             : {
    2087             :         int32_t elapsed;
    2088             : 
    2089          88 :         if (nvme_ctrlr->opts.ctrlr_loss_timeout_sec == 0 ||
    2090          37 :             nvme_ctrlr->opts.ctrlr_loss_timeout_sec == -1) {
    2091          62 :                 return false;
    2092             :         }
    2093             : 
    2094          26 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    2095          26 :         if (elapsed >= nvme_ctrlr->opts.ctrlr_loss_timeout_sec) {
    2096           6 :                 return true;
    2097             :         } else {
    2098          20 :                 return false;
    2099             :         }
    2100          88 : }
    2101             : 
    2102             : static bool
    2103          12 : bdev_nvme_check_fast_io_fail_timeout(struct nvme_ctrlr *nvme_ctrlr)
    2104             : {
    2105             :         uint32_t elapsed;
    2106             : 
    2107          12 :         if (nvme_ctrlr->opts.fast_io_fail_timeout_sec == 0) {
    2108           8 :                 return false;
    2109             :         }
    2110             : 
    2111           4 :         elapsed = (spdk_get_ticks() - nvme_ctrlr->reset_start_tsc) / spdk_get_ticks_hz();
    2112           4 :         if (elapsed >= nvme_ctrlr->opts.fast_io_fail_timeout_sec) {
    2113           2 :                 return true;
    2114             :         } else {
    2115           2 :                 return false;
    2116             :         }
    2117          12 : }
    2118             : 
    2119             : static void bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success);
    2120             : 
    2121             : static void
    2122          71 : nvme_ctrlr_disconnect(struct nvme_ctrlr *nvme_ctrlr, nvme_ctrlr_disconnected_cb cb_fn)
    2123             : {
    2124             :         int rc;
    2125             : 
    2126          71 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start disconnecting ctrlr.\n");
    2127             : 
    2128          71 :         rc = spdk_nvme_ctrlr_disconnect(nvme_ctrlr->ctrlr);
    2129          71 :         if (rc != 0) {
    2130           1 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "disconnecting ctrlr failed.\n");
    2131             : 
    2132             :                 /* Disconnect fails if ctrlr is already resetting or removed. In this case,
    2133             :                  * fail the reset sequence immediately.
    2134             :                  */
    2135           1 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2136           1 :                 return;
    2137             :         }
    2138             : 
    2139             :         /* spdk_nvme_ctrlr_disconnect() may complete asynchronously later by polling adminq.
    2140             :          * Set callback here to execute the specified operation after ctrlr is really disconnected.
    2141             :          */
    2142          70 :         assert(nvme_ctrlr->disconnected_cb == NULL);
    2143          70 :         nvme_ctrlr->disconnected_cb = cb_fn;
    2144             : 
    2145             :         /* During disconnection, reduce the period to poll adminq more often. */
    2146          70 :         bdev_nvme_change_adminq_poll_period(nvme_ctrlr, 0);
    2147          71 : }
    2148             : 
    2149             : enum bdev_nvme_op_after_reset {
    2150             :         OP_NONE,
    2151             :         OP_COMPLETE_PENDING_DESTRUCT,
    2152             :         OP_DESTRUCT,
    2153             :         OP_DELAYED_RECONNECT,
    2154             :         OP_FAILOVER,
    2155             : };
    2156             : 
    2157             : typedef enum bdev_nvme_op_after_reset _bdev_nvme_op_after_reset;
    2158             : 
    2159             : static _bdev_nvme_op_after_reset
    2160          70 : bdev_nvme_check_op_after_reset(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2161             : {
    2162          70 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    2163             :                 /* Complete pending destruct after reset completes. */
    2164           0 :                 return OP_COMPLETE_PENDING_DESTRUCT;
    2165          70 :         } else if (nvme_ctrlr->pending_failover) {
    2166           3 :                 nvme_ctrlr->pending_failover = false;
    2167           3 :                 nvme_ctrlr->reset_start_tsc = 0;
    2168           3 :                 return OP_FAILOVER;
    2169          67 :         } else if (success || nvme_ctrlr->opts.reconnect_delay_sec == 0) {
    2170          53 :                 nvme_ctrlr->reset_start_tsc = 0;
    2171          53 :                 return OP_NONE;
    2172          14 :         } else if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    2173           2 :                 return OP_DESTRUCT;
    2174             :         } else {
    2175          12 :                 if (bdev_nvme_check_fast_io_fail_timeout(nvme_ctrlr)) {
    2176           2 :                         nvme_ctrlr->fast_io_fail_timedout = true;
    2177           2 :                 }
    2178          12 :                 return OP_DELAYED_RECONNECT;
    2179             :         }
    2180          70 : }
    2181             : 
    2182             : static int bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug);
    2183             : static void bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr);
    2184             : 
    2185             : static int
    2186           9 : bdev_nvme_reconnect_delay_timer_expired(void *ctx)
    2187             : {
    2188           9 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2189             : 
    2190             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect_delay, nvme_ctrlr->nbdev_ctrlr->name);
    2191           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2192             : 
    2193           9 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2194             : 
    2195           9 :         if (!nvme_ctrlr->reconnect_is_delayed) {
    2196           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2197           0 :                 return SPDK_POLLER_BUSY;
    2198             :         }
    2199             : 
    2200           9 :         nvme_ctrlr->reconnect_is_delayed = false;
    2201             : 
    2202           9 :         if (nvme_ctrlr->destruct) {
    2203           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2204           0 :                 return SPDK_POLLER_BUSY;
    2205             :         }
    2206             : 
    2207           9 :         assert(nvme_ctrlr->resetting == false);
    2208           9 :         nvme_ctrlr->resetting = true;
    2209             : 
    2210           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2211             : 
    2212           9 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2213             : 
    2214           9 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2215           9 :         return SPDK_POLLER_BUSY;
    2216           9 : }
    2217             : 
    2218             : static void
    2219          12 : bdev_nvme_start_reconnect_delay_timer(struct nvme_ctrlr *nvme_ctrlr)
    2220             : {
    2221          12 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2222             : 
    2223          12 :         assert(nvme_ctrlr->reconnect_is_delayed == false);
    2224          12 :         nvme_ctrlr->reconnect_is_delayed = true;
    2225             : 
    2226          12 :         assert(nvme_ctrlr->reconnect_delay_timer == NULL);
    2227          12 :         nvme_ctrlr->reconnect_delay_timer = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_delay_timer_expired,
    2228             :                                             nvme_ctrlr,
    2229             :                                             nvme_ctrlr->opts.reconnect_delay_sec * SPDK_SEC_TO_USEC);
    2230          12 : }
    2231             : 
    2232             : static void remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr);
    2233             : 
    2234             : static void
    2235          68 : _bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2236             : {
    2237          68 :         bool success = (ctx == NULL);
    2238          68 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2239          68 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2240             :         enum bdev_nvme_op_after_reset op_after_reset;
    2241             : 
    2242          68 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2243             : 
    2244          68 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2245          68 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2246             : 
    2247          68 :         if (!success) {
    2248          33 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Resetting controller failed.\n");
    2249          33 :         } else {
    2250          35 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Resetting controller successful.\n");
    2251             :         }
    2252             : 
    2253          68 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2254          68 :         nvme_ctrlr->resetting = false;
    2255          68 :         nvme_ctrlr->dont_retry = false;
    2256          68 :         nvme_ctrlr->in_failover = false;
    2257             : 
    2258          68 :         op_after_reset = bdev_nvme_check_op_after_reset(nvme_ctrlr, success);
    2259          68 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2260             : 
    2261             :         /* Delay callbacks when the next operation is a failover. */
    2262          68 :         if (ctrlr_op_cb_fn && op_after_reset != OP_FAILOVER) {
    2263          17 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, success ? 0 : -1);
    2264          17 :         }
    2265             : 
    2266          68 :         switch (op_after_reset) {
    2267             :         case OP_COMPLETE_PENDING_DESTRUCT:
    2268           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2269           0 :                 break;
    2270             :         case OP_DESTRUCT:
    2271           2 :                 bdev_nvme_delete_ctrlr(nvme_ctrlr, false);
    2272           2 :                 remove_discovery_entry(nvme_ctrlr);
    2273           2 :                 break;
    2274             :         case OP_DELAYED_RECONNECT:
    2275          12 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_start_reconnect_delay_timer);
    2276          12 :                 break;
    2277             :         case OP_FAILOVER:
    2278           3 :                 nvme_ctrlr->ctrlr_op_cb_fn = ctrlr_op_cb_fn;
    2279           3 :                 nvme_ctrlr->ctrlr_op_cb_arg = ctrlr_op_cb_arg;
    2280           3 :                 bdev_nvme_failover_ctrlr(nvme_ctrlr);
    2281           3 :                 break;
    2282             :         default:
    2283          51 :                 break;
    2284             :         }
    2285          68 : }
    2286             : 
    2287             : static void
    2288          70 : bdev_nvme_reset_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, bool success)
    2289             : {
    2290          70 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2291          70 :         if (!success) {
    2292             :                 /* Connecting the active trid failed. Set the next alternate trid to the
    2293             :                  * active trid if it exists.
    2294             :                  */
    2295          35 :                 if (bdev_nvme_failover_trid(nvme_ctrlr, false, false)) {
    2296             :                         /* The next alternate trid exists and is ready to try. Try it now. */
    2297           2 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2298             : 
    2299           2 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Try the next alternate trid %s:%s now.\n",
    2300             :                                            nvme_ctrlr->active_path_id->trid.traddr,
    2301             :                                            nvme_ctrlr->active_path_id->trid.trsvcid);
    2302             : 
    2303           2 :                         nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2304           2 :                         return;
    2305             :                 }
    2306             : 
    2307             :                 /* We came here if there is no alternate trid or if the next trid exists but
    2308             :                  * is not ready to try. We will try the active trid after reconnect_delay_sec
    2309             :                  * seconds if it is non-zero or at the next reset call otherwise.
    2310             :                  */
    2311          33 :         } else {
    2312             :                 /* Connecting the active trid succeeded. Clear the last failed time because it
    2313             :                  * means the trid is failed if its last failed time is non-zero.
    2314             :                  */
    2315          35 :                 nvme_ctrlr->active_path_id->last_failed_tsc = 0;
    2316             :         }
    2317          68 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2318             : 
    2319          68 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Clear pending resets.\n");
    2320             : 
    2321             :         /* Make sure we clear any pending resets before returning. */
    2322         136 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2323             :                                     bdev_nvme_complete_pending_resets,
    2324          68 :                                     success ? NULL : (void *)0x1,
    2325             :                                     _bdev_nvme_reset_ctrlr_complete);
    2326          70 : }
    2327             : 
    2328             : static void
    2329           0 : bdev_nvme_reset_create_qpairs_failed(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2330             : {
    2331           0 :         bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2332           0 : }
    2333             : 
    2334             : static void
    2335         102 : bdev_nvme_reset_destroy_qpair(struct nvme_ctrlr_channel_iter *i,
    2336             :                               struct nvme_ctrlr *nvme_ctrlr,
    2337             :                               struct nvme_ctrlr_channel *ctrlr_ch, void *ctx)
    2338             : {
    2339             :         struct nvme_qpair *nvme_qpair;
    2340             :         struct spdk_nvme_qpair *qpair;
    2341             : 
    2342         102 :         nvme_qpair = ctrlr_ch->qpair;
    2343         102 :         assert(nvme_qpair != NULL);
    2344             : 
    2345         102 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    2346             : 
    2347         102 :         qpair = nvme_qpair->qpair;
    2348         102 :         if (qpair != NULL) {
    2349          67 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start disconnecting qpair %p:%u.\n",
    2350             :                                    qpair, spdk_nvme_qpair_get_id(qpair));
    2351             : 
    2352          67 :                 if (nvme_qpair->ctrlr->dont_retry) {
    2353          53 :                         spdk_nvme_qpair_set_abort_dnr(qpair, true);
    2354          53 :                 }
    2355          67 :                 spdk_nvme_ctrlr_disconnect_io_qpair(qpair);
    2356             : 
    2357             :                 /* The current full reset sequence will move to the next
    2358             :                  * ctrlr_channel after the qpair is actually disconnected.
    2359             :                  */
    2360          67 :                 assert(ctrlr_ch->reset_iter == NULL);
    2361          67 :                 ctrlr_ch->reset_iter = i;
    2362          67 :         } else {
    2363          35 :                 nvme_ctrlr_for_each_channel_continue(i, 0);
    2364             :         }
    2365         102 : }
    2366             : 
    2367             : static void
    2368          35 : bdev_nvme_reset_create_qpairs_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2369             : {
    2370          35 :         if (status == 0) {
    2371          35 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were created after ctrlr reset.\n");
    2372             : 
    2373          35 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, true);
    2374          35 :         } else {
    2375           0 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were failed to create after ctrlr reset.\n");
    2376             : 
    2377             :                 /* Delete the added qpairs and quiesce ctrlr to make the states clean. */
    2378           0 :                 nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2379             :                                             bdev_nvme_reset_destroy_qpair,
    2380             :                                             NULL,
    2381             :                                             bdev_nvme_reset_create_qpairs_failed);
    2382             :         }
    2383          35 : }
    2384             : 
    2385             : static int
    2386          59 : bdev_nvme_reset_check_qpair_connected(void *ctx)
    2387             : {
    2388          59 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx;
    2389          59 :         struct nvme_qpair *nvme_qpair = ctrlr_ch->qpair;
    2390             :         struct spdk_nvme_qpair *qpair;
    2391             : 
    2392          59 :         if (ctrlr_ch->reset_iter == NULL) {
    2393             :                 /* qpair was already failed to connect and the reset sequence is being aborted. */
    2394           0 :                 assert(ctrlr_ch->connect_poller == NULL);
    2395           0 :                 assert(nvme_qpair->qpair == NULL);
    2396             : 
    2397           0 :                 NVME_CTRLR_INFOLOG(nvme_qpair->ctrlr,
    2398             :                                    "qpair was already failed to connect. reset is being aborted.\n");
    2399           0 :                 return SPDK_POLLER_BUSY;
    2400             :         }
    2401             : 
    2402          59 :         qpair = nvme_qpair->qpair;
    2403          59 :         assert(qpair != NULL);
    2404             : 
    2405          59 :         if (!spdk_nvme_qpair_is_connected(qpair)) {
    2406           0 :                 return SPDK_POLLER_BUSY;
    2407             :         }
    2408             : 
    2409          59 :         NVME_CTRLR_INFOLOG(nvme_qpair->ctrlr, "qpair %p:%u was connected.\n",
    2410             :                            qpair, spdk_nvme_qpair_get_id(qpair));
    2411             : 
    2412          59 :         spdk_poller_unregister(&ctrlr_ch->connect_poller);
    2413             : 
    2414             :         /* qpair was completed to connect. Move to the next ctrlr_channel */
    2415          59 :         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    2416          59 :         ctrlr_ch->reset_iter = NULL;
    2417             : 
    2418          59 :         if (!g_opts.disable_auto_failback) {
    2419          44 :                 _bdev_nvme_clear_io_path_cache(nvme_qpair);
    2420          44 :         }
    2421             : 
    2422          59 :         return SPDK_POLLER_BUSY;
    2423          59 : }
    2424             : 
    2425             : static void
    2426          59 : bdev_nvme_reset_create_qpair(struct nvme_ctrlr_channel_iter *i,
    2427             :                              struct nvme_ctrlr *nvme_ctrlr,
    2428             :                              struct nvme_ctrlr_channel *ctrlr_ch,
    2429             :                              void *ctx)
    2430             : {
    2431          59 :         struct nvme_qpair *nvme_qpair = ctrlr_ch->qpair;
    2432             :         struct spdk_nvme_qpair *qpair;
    2433             :         int rc;
    2434             : 
    2435          59 :         rc = bdev_nvme_create_qpair(nvme_qpair);
    2436          59 :         if (rc == 0) {
    2437          59 :                 ctrlr_ch->connect_poller = SPDK_POLLER_REGISTER(bdev_nvme_reset_check_qpair_connected,
    2438             :                                            ctrlr_ch, 0);
    2439             : 
    2440          59 :                 qpair = nvme_qpair->qpair;
    2441             : 
    2442          59 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start checking qpair %p:%u to be connected.\n",
    2443             :                                    qpair, spdk_nvme_qpair_get_id(qpair));
    2444             : 
    2445             :                 /* The current full reset sequence will move to the next
    2446             :                  * ctrlr_channel after the qpair is actually connected.
    2447             :                  */
    2448          59 :                 assert(ctrlr_ch->reset_iter == NULL);
    2449          59 :                 ctrlr_ch->reset_iter = i;
    2450          59 :         } else {
    2451           0 :                 nvme_ctrlr_for_each_channel_continue(i, rc);
    2452             :         }
    2453          59 : }
    2454             : 
    2455             : static void
    2456          35 : nvme_ctrlr_check_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    2457             : {
    2458          35 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    2459             :         struct nvme_ns *nvme_ns;
    2460             : 
    2461          55 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    2462          55 :              nvme_ns != NULL;
    2463          20 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    2464          20 :                 if (!spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    2465           1 :                         SPDK_DEBUGLOG(bdev_nvme, "NSID %u was removed during reset.\n", nvme_ns->id);
    2466             :                         /* NS can be added again. Just nullify nvme_ns->ns. */
    2467           1 :                         nvme_ns->ns = NULL;
    2468           1 :                 }
    2469          20 :         }
    2470          35 : }
    2471             : 
    2472             : 
    2473             : static int
    2474          69 : bdev_nvme_reconnect_ctrlr_poll(void *arg)
    2475             : {
    2476          69 :         struct nvme_ctrlr *nvme_ctrlr = arg;
    2477             :         struct spdk_nvme_transport_id *trid;
    2478          69 :         int rc = -ETIMEDOUT;
    2479             : 
    2480          69 :         if (bdev_nvme_check_ctrlr_loss_timeout(nvme_ctrlr)) {
    2481             :                 /* Mark the ctrlr as failed. The next call to
    2482             :                  * spdk_nvme_ctrlr_reconnect_poll_async() will then
    2483             :                  * do the necessary cleanup and return failure.
    2484             :                  */
    2485           2 :                 spdk_nvme_ctrlr_fail(nvme_ctrlr->ctrlr);
    2486           2 :         }
    2487             : 
    2488          69 :         rc = spdk_nvme_ctrlr_reconnect_poll_async(nvme_ctrlr->ctrlr);
    2489          69 :         if (rc == -EAGAIN) {
    2490           0 :                 return SPDK_POLLER_BUSY;
    2491             :         }
    2492             : 
    2493          69 :         spdk_poller_unregister(&nvme_ctrlr->reset_detach_poller);
    2494          69 :         if (rc == 0) {
    2495          35 :                 trid = &nvme_ctrlr->active_path_id->trid;
    2496             : 
    2497          35 :                 if (spdk_nvme_trtype_is_fabrics(trid->trtype)) {
    2498          35 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was connected to %s:%s. Create qpairs.\n",
    2499             :                                            trid->traddr, trid->trsvcid);
    2500          35 :                 } else {
    2501           0 :                         NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was connected. Create qpairs.\n");
    2502             :                 }
    2503             : 
    2504          35 :                 nvme_ctrlr_check_namespaces(nvme_ctrlr);
    2505             : 
    2506             :                 /* Recreate all of the I/O queue pairs */
    2507          35 :                 nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2508             :                                             bdev_nvme_reset_create_qpair,
    2509             :                                             NULL,
    2510             :                                             bdev_nvme_reset_create_qpairs_done);
    2511          35 :         } else {
    2512          34 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr could not be connected.\n");
    2513             : 
    2514          34 :                 bdev_nvme_reset_ctrlr_complete(nvme_ctrlr, false);
    2515             :         }
    2516          69 :         return SPDK_POLLER_BUSY;
    2517          69 : }
    2518             : 
    2519             : static void
    2520          69 : bdev_nvme_reconnect_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2521             : {
    2522          69 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Start reconnecting ctrlr.\n");
    2523             : 
    2524          69 :         spdk_nvme_ctrlr_reconnect_async(nvme_ctrlr->ctrlr);
    2525             : 
    2526             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reconnect, nvme_ctrlr->nbdev_ctrlr->name);
    2527          69 :         assert(nvme_ctrlr->reset_detach_poller == NULL);
    2528          69 :         nvme_ctrlr->reset_detach_poller = SPDK_POLLER_REGISTER(bdev_nvme_reconnect_ctrlr_poll,
    2529             :                                           nvme_ctrlr, 0);
    2530          69 : }
    2531             : 
    2532             : static void
    2533          56 : bdev_nvme_reset_destroy_qpair_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2534             : {
    2535             :         SPDK_DTRACE_PROBE1(bdev_nvme_ctrlr_reset, nvme_ctrlr->nbdev_ctrlr->name);
    2536          56 :         assert(status == 0);
    2537             : 
    2538          56 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "qpairs were deleted.\n");
    2539             : 
    2540          56 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2541           0 :                 bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2542           0 :         } else {
    2543          56 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reconnect_ctrlr);
    2544             :         }
    2545          56 : }
    2546             : 
    2547             : static void
    2548          56 : bdev_nvme_reset_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2549             : {
    2550          56 :         NVME_CTRLR_INFOLOG(nvme_ctrlr, "Delete qpairs for reset.\n");
    2551             : 
    2552          56 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2553             :                                     bdev_nvme_reset_destroy_qpair,
    2554             :                                     NULL,
    2555             :                                     bdev_nvme_reset_destroy_qpair_done);
    2556          56 : }
    2557             : 
    2558             : static void
    2559           3 : bdev_nvme_reconnect_ctrlr_now(void *ctx)
    2560             : {
    2561           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2562             : 
    2563           3 :         assert(nvme_ctrlr->resetting == true);
    2564           3 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2565             : 
    2566           3 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2567             : 
    2568           3 :         spdk_poller_resume(nvme_ctrlr->adminq_timer_poller);
    2569             : 
    2570           3 :         bdev_nvme_reconnect_ctrlr(nvme_ctrlr);
    2571           3 : }
    2572             : 
    2573             : static void
    2574          56 : _bdev_nvme_reset_ctrlr(void *ctx)
    2575             : {
    2576          56 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2577             : 
    2578          56 :         assert(nvme_ctrlr->resetting == true);
    2579          56 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2580             : 
    2581          56 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2582           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_reset_destroy_qpairs);
    2583           0 :         } else {
    2584          56 :                 bdev_nvme_reset_destroy_qpairs(nvme_ctrlr);
    2585             :         }
    2586          56 : }
    2587             : 
    2588             : static int
    2589          49 : bdev_nvme_reset_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2590             : {
    2591             :         spdk_msg_fn msg_fn;
    2592             : 
    2593          49 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2594          49 :         if (nvme_ctrlr->destruct) {
    2595           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2596           3 :                 return -ENXIO;
    2597             :         }
    2598             : 
    2599          46 :         if (nvme_ctrlr->resetting) {
    2600          13 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2601          13 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform reset, already in progress.\n");
    2602          13 :                 return -EBUSY;
    2603             :         }
    2604             : 
    2605          33 :         if (nvme_ctrlr->disabled) {
    2606           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2607           1 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform reset. Controller is disabled.\n");
    2608           1 :                 return -EALREADY;
    2609             :         }
    2610             : 
    2611          32 :         nvme_ctrlr->resetting = true;
    2612          32 :         nvme_ctrlr->dont_retry = true;
    2613             : 
    2614          32 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2615           1 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "Reconnect is already scheduled.\n");
    2616           1 :                 msg_fn = bdev_nvme_reconnect_ctrlr_now;
    2617           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2618           1 :         } else {
    2619          31 :                 msg_fn = _bdev_nvme_reset_ctrlr;
    2620          31 :                 assert(nvme_ctrlr->reset_start_tsc == 0);
    2621             :         }
    2622             : 
    2623          32 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2624             : 
    2625          32 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2626             : 
    2627          32 :         spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2628          32 :         return 0;
    2629          49 : }
    2630             : 
    2631             : static int
    2632           3 : bdev_nvme_enable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2633             : {
    2634           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2635           3 :         if (nvme_ctrlr->destruct) {
    2636           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2637           0 :                 return -ENXIO;
    2638             :         }
    2639             : 
    2640           3 :         if (nvme_ctrlr->resetting) {
    2641           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2642           0 :                 return -EBUSY;
    2643             :         }
    2644             : 
    2645           3 :         if (!nvme_ctrlr->disabled) {
    2646           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2647           1 :                 return -EALREADY;
    2648             :         }
    2649             : 
    2650           2 :         nvme_ctrlr->disabled = false;
    2651           2 :         nvme_ctrlr->resetting = true;
    2652             : 
    2653           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2654             : 
    2655           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2656             : 
    2657           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, bdev_nvme_reconnect_ctrlr_now, nvme_ctrlr);
    2658           2 :         return 0;
    2659           3 : }
    2660             : 
    2661             : static void
    2662           2 : _bdev_nvme_disable_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2663             : {
    2664           2 :         bdev_nvme_ctrlr_op_cb ctrlr_op_cb_fn = nvme_ctrlr->ctrlr_op_cb_fn;
    2665           2 :         void *ctrlr_op_cb_arg = nvme_ctrlr->ctrlr_op_cb_arg;
    2666             :         enum bdev_nvme_op_after_reset op_after_disable;
    2667             : 
    2668           2 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2669             : 
    2670           2 :         nvme_ctrlr->ctrlr_op_cb_fn = NULL;
    2671           2 :         nvme_ctrlr->ctrlr_op_cb_arg = NULL;
    2672             : 
    2673           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2674             : 
    2675           2 :         nvme_ctrlr->resetting = false;
    2676           2 :         nvme_ctrlr->dont_retry = false;
    2677             : 
    2678           2 :         op_after_disable = bdev_nvme_check_op_after_reset(nvme_ctrlr, true);
    2679             : 
    2680           2 :         nvme_ctrlr->disabled = true;
    2681           2 :         spdk_poller_pause(nvme_ctrlr->adminq_timer_poller);
    2682             : 
    2683           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2684             : 
    2685           2 :         if (ctrlr_op_cb_fn) {
    2686           0 :                 ctrlr_op_cb_fn(ctrlr_op_cb_arg, 0);
    2687           0 :         }
    2688             : 
    2689           2 :         switch (op_after_disable) {
    2690             :         case OP_COMPLETE_PENDING_DESTRUCT:
    2691           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    2692           0 :                 break;
    2693             :         default:
    2694           2 :                 break;
    2695             :         }
    2696             : 
    2697           2 : }
    2698             : 
    2699             : static void
    2700           2 : bdev_nvme_disable_ctrlr_complete(struct nvme_ctrlr *nvme_ctrlr)
    2701             : {
    2702             :         /* Make sure we clear any pending resets before returning. */
    2703           2 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2704             :                                     bdev_nvme_complete_pending_resets,
    2705             :                                     NULL,
    2706             :                                     _bdev_nvme_disable_ctrlr_complete);
    2707           2 : }
    2708             : 
    2709             : static void
    2710           1 : bdev_nvme_disable_destroy_qpairs_done(struct nvme_ctrlr *nvme_ctrlr, void *ctx, int status)
    2711             : {
    2712           1 :         assert(status == 0);
    2713             : 
    2714           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2715           0 :                 bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2716           0 :         } else {
    2717           1 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_ctrlr_complete);
    2718             :         }
    2719           1 : }
    2720             : 
    2721             : static void
    2722           1 : bdev_nvme_disable_destroy_qpairs(struct nvme_ctrlr *nvme_ctrlr)
    2723             : {
    2724           1 :         nvme_ctrlr_for_each_channel(nvme_ctrlr,
    2725             :                                     bdev_nvme_reset_destroy_qpair,
    2726             :                                     NULL,
    2727             :                                     bdev_nvme_disable_destroy_qpairs_done);
    2728           1 : }
    2729             : 
    2730             : static void
    2731           1 : _bdev_nvme_cancel_reconnect_and_disable_ctrlr(void *ctx)
    2732             : {
    2733           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2734             : 
    2735           1 :         assert(nvme_ctrlr->resetting == true);
    2736           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2737             : 
    2738           1 :         spdk_poller_unregister(&nvme_ctrlr->reconnect_delay_timer);
    2739             : 
    2740           1 :         bdev_nvme_disable_ctrlr_complete(nvme_ctrlr);
    2741           1 : }
    2742             : 
    2743             : static void
    2744           1 : _bdev_nvme_disconnect_and_disable_ctrlr(void *ctx)
    2745             : {
    2746           1 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    2747             : 
    2748           1 :         assert(nvme_ctrlr->resetting == true);
    2749           1 :         assert(nvme_ctrlr->thread == spdk_get_thread());
    2750             : 
    2751           1 :         if (!spdk_nvme_ctrlr_is_fabrics(nvme_ctrlr->ctrlr)) {
    2752           0 :                 nvme_ctrlr_disconnect(nvme_ctrlr, bdev_nvme_disable_destroy_qpairs);
    2753           0 :         } else {
    2754           1 :                 bdev_nvme_disable_destroy_qpairs(nvme_ctrlr);
    2755             :         }
    2756           1 : }
    2757             : 
    2758             : static int
    2759           5 : bdev_nvme_disable_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    2760             : {
    2761             :         spdk_msg_fn msg_fn;
    2762             : 
    2763           5 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    2764           5 :         if (nvme_ctrlr->destruct) {
    2765           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2766           1 :                 return -ENXIO;
    2767             :         }
    2768             : 
    2769           4 :         if (nvme_ctrlr->resetting) {
    2770           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2771           1 :                 return -EBUSY;
    2772             :         }
    2773             : 
    2774           3 :         if (nvme_ctrlr->disabled) {
    2775           1 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2776           1 :                 return -EALREADY;
    2777             :         }
    2778             : 
    2779           2 :         nvme_ctrlr->resetting = true;
    2780           2 :         nvme_ctrlr->dont_retry = true;
    2781             : 
    2782           2 :         if (nvme_ctrlr->reconnect_is_delayed) {
    2783           1 :                 msg_fn = _bdev_nvme_cancel_reconnect_and_disable_ctrlr;
    2784           1 :                 nvme_ctrlr->reconnect_is_delayed = false;
    2785           1 :         } else {
    2786           1 :                 msg_fn = _bdev_nvme_disconnect_and_disable_ctrlr;
    2787             :         }
    2788             : 
    2789           2 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    2790             : 
    2791           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    2792             : 
    2793           2 :         spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    2794           2 :         return 0;
    2795           5 : }
    2796             : 
    2797             : static int
    2798          31 : nvme_ctrlr_op(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2799             :               bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2800             : {
    2801             :         int rc;
    2802             : 
    2803          31 :         switch (op) {
    2804             :         case NVME_CTRLR_OP_RESET:
    2805          30 :                 rc = bdev_nvme_reset_ctrlr(nvme_ctrlr);
    2806          30 :                 break;
    2807             :         case NVME_CTRLR_OP_ENABLE:
    2808           0 :                 rc = bdev_nvme_enable_ctrlr(nvme_ctrlr);
    2809           0 :                 break;
    2810             :         case NVME_CTRLR_OP_DISABLE:
    2811           0 :                 rc = bdev_nvme_disable_ctrlr(nvme_ctrlr);
    2812           0 :                 break;
    2813             :         default:
    2814           1 :                 rc = -EINVAL;
    2815           1 :                 break;
    2816             :         }
    2817             : 
    2818          31 :         if (rc == 0) {
    2819          16 :                 assert(nvme_ctrlr->ctrlr_op_cb_fn == NULL);
    2820          16 :                 assert(nvme_ctrlr->ctrlr_op_cb_arg == NULL);
    2821          16 :                 nvme_ctrlr->ctrlr_op_cb_fn = cb_fn;
    2822          16 :                 nvme_ctrlr->ctrlr_op_cb_arg = cb_arg;
    2823          16 :         }
    2824          31 :         return rc;
    2825             : }
    2826             : 
    2827             : struct nvme_ctrlr_op_rpc_ctx {
    2828             :         struct nvme_ctrlr *nvme_ctrlr;
    2829             :         struct spdk_thread *orig_thread;
    2830             :         enum nvme_ctrlr_op op;
    2831             :         int rc;
    2832             :         bdev_nvme_ctrlr_op_cb cb_fn;
    2833             :         void *cb_arg;
    2834             : };
    2835             : 
    2836             : static void
    2837           4 : _nvme_ctrlr_op_rpc_complete(void *_ctx)
    2838             : {
    2839           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2840             : 
    2841           4 :         assert(ctx != NULL);
    2842           4 :         assert(ctx->cb_fn != NULL);
    2843             : 
    2844           4 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2845             : 
    2846           4 :         free(ctx);
    2847           4 : }
    2848             : 
    2849             : static void
    2850           4 : nvme_ctrlr_op_rpc_complete(void *cb_arg, int rc)
    2851             : {
    2852           4 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2853             : 
    2854           4 :         ctx->rc = rc;
    2855             : 
    2856           4 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_ctrlr_op_rpc_complete, ctx);
    2857           4 : }
    2858             : 
    2859             : void
    2860           4 : nvme_ctrlr_op_rpc(struct nvme_ctrlr *nvme_ctrlr, enum nvme_ctrlr_op op,
    2861             :                   bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2862             : {
    2863             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2864             :         int rc;
    2865             : 
    2866           4 :         assert(cb_fn != NULL);
    2867             : 
    2868           4 :         ctx = calloc(1, sizeof(*ctx));
    2869           4 :         if (ctx == NULL) {
    2870           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2871           0 :                 cb_fn(cb_arg, -ENOMEM);
    2872           0 :                 return;
    2873             :         }
    2874             : 
    2875           4 :         ctx->orig_thread = spdk_get_thread();
    2876           4 :         ctx->cb_fn = cb_fn;
    2877           4 :         ctx->cb_arg = cb_arg;
    2878             : 
    2879           4 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_ctrlr_op_rpc_complete, ctx);
    2880           4 :         if (rc == 0) {
    2881           1 :                 return;
    2882           3 :         } else if (rc == -EALREADY) {
    2883           0 :                 rc = 0;
    2884           0 :         }
    2885             : 
    2886           3 :         nvme_ctrlr_op_rpc_complete(ctx, rc);
    2887           4 : }
    2888             : 
    2889             : static void nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc);
    2890             : 
    2891             : static void
    2892           2 : _nvme_bdev_ctrlr_op_rpc_continue(void *_ctx)
    2893             : {
    2894           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = _ctx;
    2895             :         struct nvme_ctrlr *prev_nvme_ctrlr, *next_nvme_ctrlr;
    2896             :         int rc;
    2897             : 
    2898           2 :         prev_nvme_ctrlr = ctx->nvme_ctrlr;
    2899           2 :         ctx->nvme_ctrlr = NULL;
    2900             : 
    2901           2 :         if (ctx->rc != 0) {
    2902           0 :                 goto complete;
    2903             :         }
    2904             : 
    2905           2 :         next_nvme_ctrlr = TAILQ_NEXT(prev_nvme_ctrlr, tailq);
    2906           2 :         if (next_nvme_ctrlr == NULL) {
    2907           1 :                 goto complete;
    2908             :         }
    2909             : 
    2910           1 :         rc = nvme_ctrlr_op(next_nvme_ctrlr, ctx->op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2911           1 :         if (rc == 0) {
    2912           1 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2913           1 :                 return;
    2914           0 :         } else if (rc == -EALREADY) {
    2915           0 :                 ctx->nvme_ctrlr = next_nvme_ctrlr;
    2916           0 :                 rc = 0;
    2917           0 :         }
    2918             : 
    2919           0 :         ctx->rc = rc;
    2920             : 
    2921             : complete:
    2922           1 :         ctx->cb_fn(ctx->cb_arg, ctx->rc);
    2923           1 :         free(ctx);
    2924           2 : }
    2925             : 
    2926             : static void
    2927           2 : nvme_bdev_ctrlr_op_rpc_continue(void *cb_arg, int rc)
    2928             : {
    2929           2 :         struct nvme_ctrlr_op_rpc_ctx *ctx = cb_arg;
    2930             : 
    2931           2 :         ctx->rc = rc;
    2932             : 
    2933           2 :         spdk_thread_send_msg(ctx->orig_thread, _nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2934           2 : }
    2935             : 
    2936             : void
    2937           1 : nvme_bdev_ctrlr_op_rpc(struct nvme_bdev_ctrlr *nbdev_ctrlr, enum nvme_ctrlr_op op,
    2938             :                        bdev_nvme_ctrlr_op_cb cb_fn, void *cb_arg)
    2939             : {
    2940             :         struct nvme_ctrlr_op_rpc_ctx *ctx;
    2941             :         struct nvme_ctrlr *nvme_ctrlr;
    2942             :         int rc;
    2943             : 
    2944           1 :         assert(cb_fn != NULL);
    2945             : 
    2946           1 :         ctx = calloc(1, sizeof(*ctx));
    2947           1 :         if (ctx == NULL) {
    2948           0 :                 SPDK_ERRLOG("Failed to allocate nvme_ctrlr_op_rpc_ctx.\n");
    2949           0 :                 cb_fn(cb_arg, -ENOMEM);
    2950           0 :                 return;
    2951             :         }
    2952             : 
    2953           1 :         ctx->orig_thread = spdk_get_thread();
    2954           1 :         ctx->op = op;
    2955           1 :         ctx->cb_fn = cb_fn;
    2956           1 :         ctx->cb_arg = cb_arg;
    2957             : 
    2958           1 :         nvme_ctrlr = TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
    2959           1 :         assert(nvme_ctrlr != NULL);
    2960             : 
    2961           1 :         rc = nvme_ctrlr_op(nvme_ctrlr, op, nvme_bdev_ctrlr_op_rpc_continue, ctx);
    2962           1 :         if (rc == 0) {
    2963           1 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2964           1 :                 return;
    2965           0 :         } else if (rc == -EALREADY) {
    2966           0 :                 ctx->nvme_ctrlr = nvme_ctrlr;
    2967           0 :                 rc = 0;
    2968           0 :         }
    2969             : 
    2970           0 :         nvme_bdev_ctrlr_op_rpc_continue(ctx, rc);
    2971           1 : }
    2972             : 
    2973             : static int _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio);
    2974             : 
    2975             : static void
    2976          15 : bdev_nvme_unfreeze_bdev_channel_done(struct nvme_bdev *nbdev, void *ctx, int status)
    2977             : {
    2978          15 :         struct nvme_bdev_io *bio = ctx;
    2979             :         enum spdk_bdev_io_status io_status;
    2980             : 
    2981          15 :         if (bio->cpl.cdw0 == 0) {
    2982          11 :                 io_status = SPDK_BDEV_IO_STATUS_SUCCESS;
    2983          11 :         } else {
    2984           4 :                 io_status = SPDK_BDEV_IO_STATUS_FAILED;
    2985             :         }
    2986             : 
    2987          15 :         NVME_BDEV_INFOLOG(nbdev, "reset_io %p completed, status:%d\n", bio, io_status);
    2988             : 
    2989          15 :         __bdev_nvme_io_complete(spdk_bdev_io_from_ctx(bio), io_status, NULL);
    2990          15 : }
    2991             : 
    2992             : static void
    2993          30 : bdev_nvme_unfreeze_bdev_channel(struct nvme_bdev_channel_iter *i,
    2994             :                                 struct nvme_bdev *nbdev,
    2995             :                                 struct nvme_bdev_channel *nbdev_ch, void *ctx)
    2996             : {
    2997          30 :         bdev_nvme_abort_retry_ios(nbdev_ch);
    2998          30 :         nbdev_ch->resetting = false;
    2999             : 
    3000          30 :         nvme_bdev_for_each_channel_continue(i, 0);
    3001          30 : }
    3002             : 
    3003             : static void
    3004          15 : bdev_nvme_reset_io_complete(struct nvme_bdev_io *bio)
    3005             : {
    3006          15 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3007          15 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3008             : 
    3009             :         /* Abort all queued I/Os for retry. */
    3010          30 :         nvme_bdev_for_each_channel(nbdev,
    3011             :                                    bdev_nvme_unfreeze_bdev_channel,
    3012          15 :                                    bio,
    3013             :                                    bdev_nvme_unfreeze_bdev_channel_done);
    3014          15 : }
    3015             : 
    3016             : static void
    3017          25 : _bdev_nvme_reset_io_continue(void *ctx)
    3018             : {
    3019          25 :         struct nvme_bdev_io *bio = ctx;
    3020             :         struct nvme_io_path *prev_io_path, *next_io_path;
    3021             :         int rc;
    3022             : 
    3023          25 :         prev_io_path = bio->io_path;
    3024          25 :         bio->io_path = NULL;
    3025             : 
    3026          25 :         next_io_path = STAILQ_NEXT(prev_io_path, stailq);
    3027          25 :         if (next_io_path == NULL) {
    3028          15 :                 goto complete;
    3029             :         }
    3030             : 
    3031          10 :         rc = _bdev_nvme_reset_io(next_io_path, bio);
    3032          10 :         if (rc == 0) {
    3033          10 :                 return;
    3034             :         }
    3035             : 
    3036             : complete:
    3037          15 :         bdev_nvme_reset_io_complete(bio);
    3038          25 : }
    3039             : 
    3040             : static void
    3041          25 : bdev_nvme_reset_io_continue(void *cb_arg, int rc)
    3042             : {
    3043          25 :         struct nvme_bdev_io *bio = cb_arg;
    3044          25 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3045          25 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3046             : 
    3047          25 :         NVME_BDEV_INFOLOG(nbdev, "continue reset_io %p, rc:%d\n", bio, rc);
    3048             : 
    3049             :         /* Reset status is initialized as "failed". Set to "success" once we have at least one
    3050             :          * successfully reset nvme_ctrlr.
    3051             :          */
    3052          25 :         if (rc == 0) {
    3053          15 :                 bio->cpl.cdw0 = 0;
    3054          15 :         }
    3055             : 
    3056          25 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), _bdev_nvme_reset_io_continue, bio);
    3057          25 : }
    3058             : 
    3059             : static int
    3060          25 : _bdev_nvme_reset_io(struct nvme_io_path *io_path, struct nvme_bdev_io *bio)
    3061             : {
    3062          25 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3063          25 :         struct nvme_bdev *nbdev = (struct nvme_bdev *)bdev_io->bdev->ctxt;
    3064          25 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    3065             :         struct nvme_ctrlr_channel *ctrlr_ch;
    3066             :         int rc;
    3067             : 
    3068          25 :         assert(bio->io_path == NULL);
    3069          25 :         bio->io_path = io_path;
    3070             : 
    3071          50 :         rc = nvme_ctrlr_op(nvme_ctrlr, NVME_CTRLR_OP_RESET,
    3072          25 :                            bdev_nvme_reset_io_continue, bio);
    3073             : 
    3074          25 :         if (rc == 0) {
    3075          13 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p started resetting ctrlr [%s, %u].\n",
    3076             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr));
    3077          25 :         } else if (rc == -EBUSY) {
    3078          11 :                 ctrlr_ch = io_path->qpair->ctrlr_ch;
    3079          11 :                 assert(ctrlr_ch != NULL);
    3080             :                 /*
    3081             :                  * Reset call is queued only if it is from the app framework. This is on purpose so that
    3082             :                  * we don't interfere with the app framework reset strategy. i.e. we are deferring to the
    3083             :                  * upper level. If they are in the middle of a reset, we won't try to schedule another one.
    3084             :                  */
    3085          11 :                 TAILQ_INSERT_TAIL(&ctrlr_ch->pending_resets, bio, retry_link);
    3086             : 
    3087          11 :                 rc = 0;
    3088             : 
    3089          11 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p was queued to ctrlr [%s, %u].\n",
    3090             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr));
    3091          11 :         } else {
    3092           1 :                 NVME_BDEV_INFOLOG(nbdev, "reset_io %p could not reset ctrlr [%s, %u], rc:%d\n",
    3093             :                                   bio, CTRLR_STRING(nvme_ctrlr), CTRLR_ID(nvme_ctrlr), rc);
    3094             :         }
    3095             : 
    3096          25 :         return rc;
    3097             : }
    3098             : 
    3099             : static void
    3100          15 : bdev_nvme_freeze_bdev_channel_done(struct nvme_bdev *nbdev, void *ctx, int status)
    3101             : {
    3102          15 :         struct nvme_bdev_io *bio = ctx;
    3103          15 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    3104             :         struct nvme_bdev_channel *nbdev_ch;
    3105             :         struct nvme_io_path *io_path;
    3106             :         int rc;
    3107             : 
    3108          15 :         nbdev_ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
    3109             : 
    3110             :         /* Initialize with failed status. With multipath it is enough to have at least one successful
    3111             :          * nvme_ctrlr reset. If there is none, reset status will remain failed.
    3112             :          */
    3113          15 :         bio->cpl.cdw0 = 1;
    3114             : 
    3115             :         /* Reset all nvme_ctrlrs of a bdev controller sequentially. */
    3116          15 :         io_path = STAILQ_FIRST(&nbdev_ch->io_path_list);
    3117          15 :         assert(io_path != NULL);
    3118             : 
    3119          15 :         rc = _bdev_nvme_reset_io(io_path, bio);
    3120          15 :         if (rc != 0) {
    3121             :                 /* If the current nvme_ctrlr is disabled, skip it and move to the next nvme_ctrlr. */
    3122           1 :                 rc = (rc == -EALREADY) ? 0 : rc;
    3123             : 
    3124           1 :                 bdev_nvme_reset_io_continue(bio, rc);
    3125           1 :         }
    3126          15 : }
    3127             : 
    3128             : static void
    3129          30 : bdev_nvme_freeze_bdev_channel(struct nvme_bdev_channel_iter *i,
    3130             :                               struct nvme_bdev *nbdev,
    3131             :                               struct nvme_bdev_channel *nbdev_ch, void *ctx)
    3132             : {
    3133          30 :         nbdev_ch->resetting = true;
    3134             : 
    3135          30 :         nvme_bdev_for_each_channel_continue(i, 0);
    3136          30 : }
    3137             : 
    3138             : static void
    3139          15 : bdev_nvme_reset_io(struct nvme_bdev *nbdev, struct nvme_bdev_io *bio)
    3140             : {
    3141          15 :         NVME_BDEV_INFOLOG(nbdev, "reset_io %p started.\n", bio);
    3142             : 
    3143          30 :         nvme_bdev_for_each_channel(nbdev,
    3144             :                                    bdev_nvme_freeze_bdev_channel,
    3145          15 :                                    bio,
    3146             :                                    bdev_nvme_freeze_bdev_channel_done);
    3147          15 : }
    3148             : 
    3149             : static int
    3150          31 : bdev_nvme_failover_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool remove)
    3151             : {
    3152          31 :         if (nvme_ctrlr->destruct) {
    3153             :                 /* Don't bother resetting if the controller is in the process of being destructed. */
    3154           2 :                 return -ENXIO;
    3155             :         }
    3156             : 
    3157          29 :         if (nvme_ctrlr->resetting) {
    3158           3 :                 if (!nvme_ctrlr->in_failover) {
    3159           3 :                         NVME_CTRLR_NOTICELOG(nvme_ctrlr,
    3160             :                                              "Reset is already in progress. Defer failover until reset completes.\n");
    3161             : 
    3162             :                         /* Defer failover until reset completes. */
    3163           3 :                         nvme_ctrlr->pending_failover = true;
    3164           3 :                         return -EINPROGRESS;
    3165             :                 } else {
    3166           0 :                         NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Unable to perform failover, already in progress.\n");
    3167           0 :                         return -EBUSY;
    3168             :                 }
    3169             :         }
    3170             : 
    3171          26 :         bdev_nvme_failover_trid(nvme_ctrlr, remove, true);
    3172             : 
    3173          26 :         if (nvme_ctrlr->reconnect_is_delayed) {
    3174           1 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Reconnect is already scheduled.\n");
    3175             : 
    3176             :                 /* We rely on the next reconnect for the failover. */
    3177           1 :                 return -EALREADY;
    3178             :         }
    3179             : 
    3180          25 :         if (nvme_ctrlr->disabled) {
    3181           0 :                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Controller is disabled.\n");
    3182             : 
    3183             :                 /* We rely on the enablement for the failover. */
    3184           0 :                 return -EALREADY;
    3185             :         }
    3186             : 
    3187          25 :         nvme_ctrlr->resetting = true;
    3188          25 :         nvme_ctrlr->in_failover = true;
    3189             : 
    3190          25 :         assert(nvme_ctrlr->reset_start_tsc == 0);
    3191          25 :         nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
    3192             : 
    3193          25 :         return 0;
    3194          31 : }
    3195             : 
    3196             : static int
    3197          29 : bdev_nvme_failover_ctrlr(struct nvme_ctrlr *nvme_ctrlr)
    3198             : {
    3199             :         int rc;
    3200             : 
    3201          29 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    3202          29 :         rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, false);
    3203          29 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    3204             : 
    3205          29 :         if (rc == 0) {
    3206          24 :                 spdk_thread_send_msg(nvme_ctrlr->thread, _bdev_nvme_reset_ctrlr, nvme_ctrlr);
    3207          29 :         } else if (rc == -EALREADY) {
    3208           0 :                 rc = 0;
    3209           0 :         }
    3210             : 
    3211          29 :         return rc;
    3212             : }
    3213             : 
    3214             : static int bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    3215             :                            uint64_t num_blocks);
    3216             : 
    3217             : static int bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks,
    3218             :                                   uint64_t num_blocks);
    3219             : 
    3220             : static int bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks,
    3221             :                           uint64_t src_offset_blocks,
    3222             :                           uint64_t num_blocks);
    3223             : 
    3224             : static void
    3225           1 : bdev_nvme_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
    3226             :                      bool success)
    3227             : {
    3228           1 :         struct nvme_bdev_io *bio = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3229             :         int ret;
    3230             : 
    3231           1 :         if (!success) {
    3232           0 :                 ret = -EINVAL;
    3233           0 :                 goto exit;
    3234             :         }
    3235             : 
    3236           1 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    3237           0 :                 ret = -ENXIO;
    3238           0 :                 goto exit;
    3239             :         }
    3240             : 
    3241           2 :         ret = bdev_nvme_readv(bio,
    3242           1 :                               bdev_io->u.bdev.iovs,
    3243           1 :                               bdev_io->u.bdev.iovcnt,
    3244           1 :                               bdev_io->u.bdev.md_buf,
    3245           1 :                               bdev_io->u.bdev.num_blocks,
    3246           1 :                               bdev_io->u.bdev.offset_blocks,
    3247           1 :                               bdev_io->u.bdev.dif_check_flags,
    3248           1 :                               bdev_io->u.bdev.memory_domain,
    3249           1 :                               bdev_io->u.bdev.memory_domain_ctx,
    3250           1 :                               bdev_io->u.bdev.accel_sequence);
    3251             : 
    3252             : exit:
    3253           1 :         if (spdk_unlikely(ret != 0)) {
    3254           0 :                 bdev_nvme_io_complete(bio, ret);
    3255           0 :         }
    3256           1 : }
    3257             : 
    3258             : static inline void
    3259          59 : _bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
    3260             : {
    3261          59 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3262          59 :         struct spdk_bdev *bdev = bdev_io->bdev;
    3263             :         struct nvme_bdev_io *nbdev_io_to_abort;
    3264          59 :         int rc = 0;
    3265             : 
    3266          59 :         switch (bdev_io->type) {
    3267             :         case SPDK_BDEV_IO_TYPE_READ:
    3268           3 :                 if (bdev_io->u.bdev.iovs && bdev_io->u.bdev.iovs[0].iov_base) {
    3269             : 
    3270           4 :                         rc = bdev_nvme_readv(nbdev_io,
    3271           2 :                                              bdev_io->u.bdev.iovs,
    3272           2 :                                              bdev_io->u.bdev.iovcnt,
    3273           2 :                                              bdev_io->u.bdev.md_buf,
    3274           2 :                                              bdev_io->u.bdev.num_blocks,
    3275           2 :                                              bdev_io->u.bdev.offset_blocks,
    3276           2 :                                              bdev_io->u.bdev.dif_check_flags,
    3277           2 :                                              bdev_io->u.bdev.memory_domain,
    3278           2 :                                              bdev_io->u.bdev.memory_domain_ctx,
    3279           2 :                                              bdev_io->u.bdev.accel_sequence);
    3280           2 :                 } else {
    3281           2 :                         spdk_bdev_io_get_buf(bdev_io, bdev_nvme_get_buf_cb,
    3282           1 :                                              bdev_io->u.bdev.num_blocks * bdev->blocklen);
    3283           1 :                         rc = 0;
    3284             :                 }
    3285           3 :                 break;
    3286             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3287          50 :                 rc = bdev_nvme_writev(nbdev_io,
    3288          25 :                                       bdev_io->u.bdev.iovs,
    3289          25 :                                       bdev_io->u.bdev.iovcnt,
    3290          25 :                                       bdev_io->u.bdev.md_buf,
    3291          25 :                                       bdev_io->u.bdev.num_blocks,
    3292          25 :                                       bdev_io->u.bdev.offset_blocks,
    3293          25 :                                       bdev_io->u.bdev.dif_check_flags,
    3294          25 :                                       bdev_io->u.bdev.memory_domain,
    3295          25 :                                       bdev_io->u.bdev.memory_domain_ctx,
    3296          25 :                                       bdev_io->u.bdev.accel_sequence,
    3297          25 :                                       bdev_io->u.bdev.nvme_cdw12,
    3298          25 :                                       bdev_io->u.bdev.nvme_cdw13);
    3299          25 :                 break;
    3300             :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3301           2 :                 rc = bdev_nvme_comparev(nbdev_io,
    3302           1 :                                         bdev_io->u.bdev.iovs,
    3303           1 :                                         bdev_io->u.bdev.iovcnt,
    3304           1 :                                         bdev_io->u.bdev.md_buf,
    3305           1 :                                         bdev_io->u.bdev.num_blocks,
    3306           1 :                                         bdev_io->u.bdev.offset_blocks,
    3307           1 :                                         bdev_io->u.bdev.dif_check_flags);
    3308           1 :                 break;
    3309             :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3310           4 :                 rc = bdev_nvme_comparev_and_writev(nbdev_io,
    3311           2 :                                                    bdev_io->u.bdev.iovs,
    3312           2 :                                                    bdev_io->u.bdev.iovcnt,
    3313           2 :                                                    bdev_io->u.bdev.fused_iovs,
    3314           2 :                                                    bdev_io->u.bdev.fused_iovcnt,
    3315           2 :                                                    bdev_io->u.bdev.md_buf,
    3316           2 :                                                    bdev_io->u.bdev.num_blocks,
    3317           2 :                                                    bdev_io->u.bdev.offset_blocks,
    3318           2 :                                                    bdev_io->u.bdev.dif_check_flags);
    3319           2 :                 break;
    3320             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3321           2 :                 rc = bdev_nvme_unmap(nbdev_io,
    3322           1 :                                      bdev_io->u.bdev.offset_blocks,
    3323           1 :                                      bdev_io->u.bdev.num_blocks);
    3324           1 :                 break;
    3325             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3326           0 :                 rc =  bdev_nvme_write_zeroes(nbdev_io,
    3327           0 :                                              bdev_io->u.bdev.offset_blocks,
    3328           0 :                                              bdev_io->u.bdev.num_blocks);
    3329           0 :                 break;
    3330             :         case SPDK_BDEV_IO_TYPE_RESET:
    3331          15 :                 nbdev_io->io_path = NULL;
    3332          15 :                 bdev_nvme_reset_io(bdev->ctxt, nbdev_io);
    3333          15 :                 return;
    3334             : 
    3335             :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3336           1 :                 bdev_nvme_io_complete(nbdev_io, 0);
    3337           1 :                 return;
    3338             : 
    3339             :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3340           0 :                 rc = bdev_nvme_zone_appendv(nbdev_io,
    3341           0 :                                             bdev_io->u.bdev.iovs,
    3342           0 :                                             bdev_io->u.bdev.iovcnt,
    3343           0 :                                             bdev_io->u.bdev.md_buf,
    3344           0 :                                             bdev_io->u.bdev.num_blocks,
    3345           0 :                                             bdev_io->u.bdev.offset_blocks,
    3346           0 :                                             bdev_io->u.bdev.dif_check_flags);
    3347           0 :                 break;
    3348             :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3349           0 :                 rc = bdev_nvme_get_zone_info(nbdev_io,
    3350           0 :                                              bdev_io->u.zone_mgmt.zone_id,
    3351           0 :                                              bdev_io->u.zone_mgmt.num_zones,
    3352           0 :                                              bdev_io->u.zone_mgmt.buf);
    3353           0 :                 break;
    3354             :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3355           0 :                 rc = bdev_nvme_zone_management(nbdev_io,
    3356           0 :                                                bdev_io->u.zone_mgmt.zone_id,
    3357           0 :                                                bdev_io->u.zone_mgmt.zone_action);
    3358           0 :                 break;
    3359             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3360           5 :                 nbdev_io->io_path = NULL;
    3361          10 :                 bdev_nvme_admin_passthru(nbdev_ch,
    3362           5 :                                          nbdev_io,
    3363           5 :                                          &bdev_io->u.nvme_passthru.cmd,
    3364           5 :                                          bdev_io->u.nvme_passthru.buf,
    3365           5 :                                          bdev_io->u.nvme_passthru.nbytes);
    3366           5 :                 return;
    3367             : 
    3368             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3369           0 :                 rc = bdev_nvme_io_passthru(nbdev_io,
    3370           0 :                                            &bdev_io->u.nvme_passthru.cmd,
    3371           0 :                                            bdev_io->u.nvme_passthru.buf,
    3372           0 :                                            bdev_io->u.nvme_passthru.nbytes);
    3373           0 :                 break;
    3374             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3375           0 :                 rc = bdev_nvme_io_passthru_md(nbdev_io,
    3376           0 :                                               &bdev_io->u.nvme_passthru.cmd,
    3377           0 :                                               bdev_io->u.nvme_passthru.buf,
    3378           0 :                                               bdev_io->u.nvme_passthru.nbytes,
    3379           0 :                                               bdev_io->u.nvme_passthru.md_buf,
    3380           0 :                                               bdev_io->u.nvme_passthru.md_len);
    3381           0 :                 break;
    3382             :         case SPDK_BDEV_IO_TYPE_NVME_IOV_MD:
    3383           0 :                 rc = bdev_nvme_iov_passthru_md(nbdev_io,
    3384           0 :                                                &bdev_io->u.nvme_passthru.cmd,
    3385           0 :                                                bdev_io->u.nvme_passthru.iovs,
    3386           0 :                                                bdev_io->u.nvme_passthru.iovcnt,
    3387           0 :                                                bdev_io->u.nvme_passthru.nbytes,
    3388           0 :                                                bdev_io->u.nvme_passthru.md_buf,
    3389           0 :                                                bdev_io->u.nvme_passthru.md_len);
    3390           0 :                 break;
    3391             :         case SPDK_BDEV_IO_TYPE_ABORT:
    3392           6 :                 nbdev_io->io_path = NULL;
    3393           6 :                 nbdev_io_to_abort = (struct nvme_bdev_io *)bdev_io->u.abort.bio_to_abort->driver_ctx;
    3394          12 :                 bdev_nvme_abort(nbdev_ch,
    3395           6 :                                 nbdev_io,
    3396           6 :                                 nbdev_io_to_abort);
    3397           6 :                 return;
    3398             : 
    3399             :         case SPDK_BDEV_IO_TYPE_COPY:
    3400           0 :                 rc = bdev_nvme_copy(nbdev_io,
    3401           0 :                                     bdev_io->u.bdev.offset_blocks,
    3402           0 :                                     bdev_io->u.bdev.copy.src_offset_blocks,
    3403           0 :                                     bdev_io->u.bdev.num_blocks);
    3404           0 :                 break;
    3405             :         default:
    3406           0 :                 rc = -EINVAL;
    3407           0 :                 break;
    3408             :         }
    3409             : 
    3410          32 :         if (spdk_unlikely(rc != 0)) {
    3411           0 :                 bdev_nvme_io_complete(nbdev_io, rc);
    3412           0 :         }
    3413          59 : }
    3414             : 
    3415             : static void
    3416          68 : bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
    3417             : {
    3418          68 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    3419          68 :         struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
    3420             : 
    3421          68 :         if (spdk_likely(nbdev_io->submit_tsc == 0)) {
    3422          68 :                 nbdev_io->submit_tsc = spdk_bdev_io_get_submit_tsc(bdev_io);
    3423          68 :         } else {
    3424             :                 /* There are cases where submit_tsc != 0, i.e. retry I/O.
    3425             :                  * We need to update submit_tsc here.
    3426             :                  */
    3427           0 :                 nbdev_io->submit_tsc = spdk_get_ticks();
    3428             :         }
    3429             : 
    3430          68 :         spdk_trace_record(TRACE_BDEV_NVME_IO_START, 0, 0, (uintptr_t)nbdev_io, (uintptr_t)bdev_io);
    3431          68 :         nbdev_io->io_path = bdev_nvme_find_io_path(nbdev_ch);
    3432          68 :         if (spdk_unlikely(!nbdev_io->io_path)) {
    3433          13 :                 if (!bdev_nvme_io_type_is_admin(bdev_io->type)) {
    3434          12 :                         bdev_nvme_io_complete(nbdev_io, -ENXIO);
    3435          12 :                         return;
    3436             :                 }
    3437             : 
    3438             :                 /* Admin commands do not use the optimal I/O path.
    3439             :                  * Simply fall through even if it is not found.
    3440             :                  */
    3441           1 :         }
    3442             : 
    3443          56 :         _bdev_nvme_submit_request(nbdev_ch, bdev_io);
    3444          68 : }
    3445             : 
    3446             : static bool
    3447           0 : bdev_nvme_is_supported_csi(enum spdk_nvme_csi csi)
    3448             : {
    3449           0 :         switch (csi) {
    3450             :         case SPDK_NVME_CSI_NVM:
    3451           0 :                 return true;
    3452             :         case SPDK_NVME_CSI_ZNS:
    3453           0 :                 return true;
    3454             :         default:
    3455           0 :                 return false;
    3456             :         }
    3457           0 : }
    3458             : 
    3459             : static bool
    3460           0 : bdev_nvme_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
    3461             : {
    3462           0 :         struct nvme_bdev *nbdev = ctx;
    3463             :         struct nvme_ns *nvme_ns;
    3464             :         struct spdk_nvme_ns *ns;
    3465             :         struct spdk_nvme_ctrlr *ctrlr;
    3466             :         const struct spdk_nvme_ctrlr_data *cdata;
    3467             : 
    3468           0 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    3469           0 :         assert(nvme_ns != NULL);
    3470           0 :         ns = nvme_ns->ns;
    3471           0 :         if (ns == NULL) {
    3472           0 :                 return false;
    3473             :         }
    3474             : 
    3475           0 :         if (!bdev_nvme_is_supported_csi(spdk_nvme_ns_get_csi(ns))) {
    3476           0 :                 switch (io_type) {
    3477             :                 case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3478             :                 case SPDK_BDEV_IO_TYPE_NVME_IO:
    3479           0 :                         return true;
    3480             : 
    3481             :                 case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3482           0 :                         return spdk_nvme_ns_get_md_size(ns) ? true : false;
    3483             : 
    3484             :                 default:
    3485           0 :                         return false;
    3486             :                 }
    3487             :         }
    3488             : 
    3489           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3490             : 
    3491           0 :         switch (io_type) {
    3492             :         case SPDK_BDEV_IO_TYPE_READ:
    3493             :         case SPDK_BDEV_IO_TYPE_WRITE:
    3494             :         case SPDK_BDEV_IO_TYPE_RESET:
    3495             :         case SPDK_BDEV_IO_TYPE_FLUSH:
    3496             :         case SPDK_BDEV_IO_TYPE_NVME_ADMIN:
    3497             :         case SPDK_BDEV_IO_TYPE_NVME_IO:
    3498             :         case SPDK_BDEV_IO_TYPE_ABORT:
    3499           0 :                 return true;
    3500             : 
    3501             :         case SPDK_BDEV_IO_TYPE_COMPARE:
    3502           0 :                 return spdk_nvme_ns_supports_compare(ns);
    3503             : 
    3504             :         case SPDK_BDEV_IO_TYPE_NVME_IO_MD:
    3505           0 :                 return spdk_nvme_ns_get_md_size(ns) ? true : false;
    3506             : 
    3507             :         case SPDK_BDEV_IO_TYPE_UNMAP:
    3508           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3509           0 :                 return cdata->oncs.dsm;
    3510             : 
    3511             :         case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
    3512           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3513           0 :                 return cdata->oncs.write_zeroes;
    3514             : 
    3515             :         case SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE:
    3516           0 :                 if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    3517             :                     SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED) {
    3518           0 :                         return true;
    3519             :                 }
    3520           0 :                 return false;
    3521             : 
    3522             :         case SPDK_BDEV_IO_TYPE_GET_ZONE_INFO:
    3523             :         case SPDK_BDEV_IO_TYPE_ZONE_MANAGEMENT:
    3524           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS;
    3525             : 
    3526             :         case SPDK_BDEV_IO_TYPE_ZONE_APPEND:
    3527           0 :                 return spdk_nvme_ns_get_csi(ns) == SPDK_NVME_CSI_ZNS &&
    3528           0 :                        spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ZONE_APPEND_SUPPORTED;
    3529             : 
    3530             :         case SPDK_BDEV_IO_TYPE_COPY:
    3531           0 :                 cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3532           0 :                 return cdata->oncs.copy;
    3533             : 
    3534             :         default:
    3535           0 :                 return false;
    3536             :         }
    3537           0 : }
    3538             : 
    3539             : static int
    3540          59 : nvme_qpair_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ctrlr_channel *ctrlr_ch)
    3541             : {
    3542             :         struct nvme_qpair *nvme_qpair;
    3543             :         struct spdk_io_channel *pg_ch;
    3544             :         int rc;
    3545             : 
    3546          59 :         nvme_qpair = calloc(1, sizeof(*nvme_qpair));
    3547          59 :         if (!nvme_qpair) {
    3548           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to alloc nvme_qpair.\n");
    3549           0 :                 return -1;
    3550             :         }
    3551             : 
    3552          59 :         TAILQ_INIT(&nvme_qpair->io_path_list);
    3553             : 
    3554          59 :         nvme_qpair->ctrlr = nvme_ctrlr;
    3555          59 :         nvme_qpair->ctrlr_ch = ctrlr_ch;
    3556             : 
    3557          59 :         pg_ch = spdk_get_io_channel(&g_nvme_bdev_ctrlrs);
    3558          59 :         if (!pg_ch) {
    3559           0 :                 free(nvme_qpair);
    3560           0 :                 return -1;
    3561             :         }
    3562             : 
    3563          59 :         nvme_qpair->group = spdk_io_channel_get_ctx(pg_ch);
    3564             : 
    3565             : #ifdef SPDK_CONFIG_VTUNE
    3566             :         nvme_qpair->group->collect_spin_stat = true;
    3567             : #else
    3568          59 :         nvme_qpair->group->collect_spin_stat = false;
    3569             : #endif
    3570             : 
    3571          59 :         if (!nvme_ctrlr->disabled) {
    3572             :                 /* If a nvme_ctrlr is disabled, don't try to create qpair for it. Qpair will
    3573             :                  * be created when it's enabled.
    3574             :                  */
    3575          59 :                 rc = bdev_nvme_create_qpair(nvme_qpair);
    3576          59 :                 if (rc != 0) {
    3577             :                         /* nvme_ctrlr can't create IO qpair if connection is down.
    3578             :                          * If reconnect_delay_sec is non-zero, creating IO qpair is retried
    3579             :                          * after reconnect_delay_sec seconds. If bdev_retry_count is non-zero,
    3580             :                          * submitted IO will be queued until IO qpair is successfully created.
    3581             :                          *
    3582             :                          * Hence, if both are satisfied, ignore the failure.
    3583             :                          */
    3584           0 :                         if (nvme_ctrlr->opts.reconnect_delay_sec == 0 || g_opts.bdev_retry_count == 0) {
    3585           0 :                                 spdk_put_io_channel(pg_ch);
    3586           0 :                                 free(nvme_qpair);
    3587           0 :                                 return rc;
    3588             :                         }
    3589           0 :                 }
    3590          59 :         }
    3591             : 
    3592          59 :         TAILQ_INSERT_TAIL(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3593             : 
    3594          59 :         ctrlr_ch->qpair = nvme_qpair;
    3595             : 
    3596          59 :         pthread_mutex_lock(&nvme_qpair->ctrlr->mutex);
    3597          59 :         nvme_qpair->ctrlr->ref++;
    3598          59 :         pthread_mutex_unlock(&nvme_qpair->ctrlr->mutex);
    3599             : 
    3600          59 :         return 0;
    3601          59 : }
    3602             : 
    3603             : static int
    3604          59 : bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3605             : {
    3606          59 :         struct nvme_ctrlr *nvme_ctrlr = io_device;
    3607          59 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3608             : 
    3609          59 :         TAILQ_INIT(&ctrlr_ch->pending_resets);
    3610             : 
    3611          59 :         return nvme_qpair_create(nvme_ctrlr, ctrlr_ch);
    3612             : }
    3613             : 
    3614             : static void
    3615          59 : nvme_qpair_delete(struct nvme_qpair *nvme_qpair)
    3616             : {
    3617             :         struct nvme_io_path *io_path, *next;
    3618             : 
    3619          59 :         assert(nvme_qpair->group != NULL);
    3620             : 
    3621          96 :         TAILQ_FOREACH_SAFE(io_path, &nvme_qpair->io_path_list, tailq, next) {
    3622          37 :                 TAILQ_REMOVE(&nvme_qpair->io_path_list, io_path, tailq);
    3623          37 :                 nvme_io_path_free(io_path);
    3624          37 :         }
    3625             : 
    3626          59 :         TAILQ_REMOVE(&nvme_qpair->group->qpair_list, nvme_qpair, tailq);
    3627             : 
    3628          59 :         spdk_put_io_channel(spdk_io_channel_from_ctx(nvme_qpair->group));
    3629             : 
    3630          59 :         nvme_ctrlr_release(nvme_qpair->ctrlr);
    3631             : 
    3632          59 :         free(nvme_qpair);
    3633          59 : }
    3634             : 
    3635             : static void
    3636          59 : bdev_nvme_destroy_ctrlr_channel_cb(void *io_device, void *ctx_buf)
    3637             : {
    3638          59 :         struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
    3639             :         struct nvme_qpair *nvme_qpair;
    3640             : 
    3641          59 :         nvme_qpair = ctrlr_ch->qpair;
    3642          59 :         assert(nvme_qpair != NULL);
    3643             : 
    3644          59 :         _bdev_nvme_clear_io_path_cache(nvme_qpair);
    3645             : 
    3646          59 :         if (nvme_qpair->qpair != NULL) {
    3647          45 :                 if (ctrlr_ch->reset_iter == NULL) {
    3648          45 :                         spdk_nvme_ctrlr_disconnect_io_qpair(nvme_qpair->qpair);
    3649          45 :                 } else {
    3650             :                         /* Skip current ctrlr_channel in a full reset sequence because
    3651             :                          * it is being deleted now. The qpair is already being disconnected.
    3652             :                          * We do not have to restart disconnecting it.
    3653             :                          */
    3654           0 :                         nvme_ctrlr_for_each_channel_continue(ctrlr_ch->reset_iter, 0);
    3655             :                 }
    3656             : 
    3657             :                 /* We cannot release a reference to the poll group now.
    3658             :                  * The qpair may be disconnected asynchronously later.
    3659             :                  * We need to poll it until it is actually disconnected.
    3660             :                  * Just detach the qpair from the deleting ctrlr_channel.
    3661             :                  */
    3662          45 :                 nvme_qpair->ctrlr_ch = NULL;
    3663          45 :         } else {
    3664          14 :                 assert(ctrlr_ch->reset_iter == NULL);
    3665             : 
    3666          14 :                 nvme_qpair_delete(nvme_qpair);
    3667             :         }
    3668          59 : }
    3669             : 
    3670             : static inline struct spdk_io_channel *
    3671           0 : bdev_nvme_get_accel_channel(struct nvme_poll_group *group)
    3672             : {
    3673           0 :         if (spdk_unlikely(!group->accel_channel)) {
    3674           0 :                 group->accel_channel = spdk_accel_get_io_channel();
    3675           0 :                 if (!group->accel_channel) {
    3676           0 :                         SPDK_ERRLOG("Cannot get the accel_channel for bdev nvme polling group=%p\n",
    3677             :                                     group);
    3678           0 :                         return NULL;
    3679             :                 }
    3680           0 :         }
    3681             : 
    3682           0 :         return group->accel_channel;
    3683           0 : }
    3684             : 
    3685             : static void
    3686           0 : bdev_nvme_finish_sequence(void *seq, spdk_nvme_accel_completion_cb cb_fn, void *cb_arg)
    3687             : {
    3688           0 :         spdk_accel_sequence_finish(seq, cb_fn, cb_arg);
    3689           0 : }
    3690             : 
    3691             : static void
    3692           0 : bdev_nvme_abort_sequence(void *seq)
    3693             : {
    3694           0 :         spdk_accel_sequence_abort(seq);
    3695           0 : }
    3696             : 
    3697             : static void
    3698           0 : bdev_nvme_reverse_sequence(void *seq)
    3699             : {
    3700           0 :         spdk_accel_sequence_reverse(seq);
    3701           0 : }
    3702             : 
    3703             : static int
    3704           0 : bdev_nvme_append_crc32c(void *ctx, void **seq, uint32_t *dst, struct iovec *iovs, uint32_t iovcnt,
    3705             :                         struct spdk_memory_domain *domain, void *domain_ctx, uint32_t seed,
    3706             :                         spdk_nvme_accel_step_cb cb_fn, void *cb_arg)
    3707             : {
    3708             :         struct spdk_io_channel *ch;
    3709           0 :         struct nvme_poll_group *group = ctx;
    3710             : 
    3711           0 :         ch = bdev_nvme_get_accel_channel(group);
    3712           0 :         if (spdk_unlikely(ch == NULL)) {
    3713           0 :                 return -ENOMEM;
    3714             :         }
    3715             : 
    3716           0 :         return spdk_accel_append_crc32c((struct spdk_accel_sequence **)seq, ch, dst, iovs, iovcnt,
    3717           0 :                                         domain, domain_ctx, seed, cb_fn, cb_arg);
    3718           0 : }
    3719             : 
    3720             : static int
    3721           0 : bdev_nvme_append_copy(void *ctx, void **seq, struct iovec *dst_iovs, uint32_t dst_iovcnt,
    3722             :                       struct spdk_memory_domain *dst_domain, void *dst_domain_ctx,
    3723             :                       struct iovec *src_iovs, uint32_t src_iovcnt,
    3724             :                       struct spdk_memory_domain *src_domain, void *src_domain_ctx,
    3725             :                       spdk_nvme_accel_step_cb cb_fn, void *cb_arg)
    3726             : {
    3727             :         struct spdk_io_channel *ch;
    3728           0 :         struct nvme_poll_group *group = ctx;
    3729             : 
    3730           0 :         ch = bdev_nvme_get_accel_channel(group);
    3731           0 :         if (spdk_unlikely(ch == NULL)) {
    3732           0 :                 return -ENOMEM;
    3733             :         }
    3734             : 
    3735           0 :         return spdk_accel_append_copy((struct spdk_accel_sequence **)seq, ch,
    3736           0 :                                       dst_iovs, dst_iovcnt, dst_domain, dst_domain_ctx,
    3737           0 :                                       src_iovs, src_iovcnt, src_domain, src_domain_ctx,
    3738           0 :                                       cb_fn, cb_arg);
    3739           0 : }
    3740             : 
    3741             : static struct spdk_nvme_accel_fn_table g_bdev_nvme_accel_fn_table = {
    3742             :         .table_size             = sizeof(struct spdk_nvme_accel_fn_table),
    3743             :         .append_crc32c          = bdev_nvme_append_crc32c,
    3744             :         .append_copy            = bdev_nvme_append_copy,
    3745             :         .finish_sequence        = bdev_nvme_finish_sequence,
    3746             :         .reverse_sequence       = bdev_nvme_reverse_sequence,
    3747             :         .abort_sequence         = bdev_nvme_abort_sequence,
    3748             : };
    3749             : 
    3750             : static int
    3751           0 : bdev_nvme_interrupt_wrapper(void *ctx)
    3752             : {
    3753             :         int num_events;
    3754           0 :         struct nvme_poll_group *group = ctx;
    3755             : 
    3756           0 :         num_events = spdk_nvme_poll_group_wait(group->group, bdev_nvme_disconnected_qpair_cb);
    3757           0 :         if (spdk_unlikely(num_events < 0)) {
    3758           0 :                 bdev_nvme_check_io_qpairs(group);
    3759           0 :         }
    3760             : 
    3761           0 :         return num_events;
    3762             : }
    3763             : 
    3764             : static int
    3765          44 : bdev_nvme_create_poll_group_cb(void *io_device, void *ctx_buf)
    3766             : {
    3767          44 :         struct nvme_poll_group *group = ctx_buf;
    3768             :         uint64_t period;
    3769             :         int fd;
    3770             : 
    3771          44 :         TAILQ_INIT(&group->qpair_list);
    3772             : 
    3773          44 :         group->group = spdk_nvme_poll_group_create(group, &g_bdev_nvme_accel_fn_table);
    3774          44 :         if (group->group == NULL) {
    3775           0 :                 return -1;
    3776             :         }
    3777             : 
    3778          44 :         period = spdk_interrupt_mode_is_enabled() ? 0 : g_opts.nvme_ioq_poll_period_us;
    3779          44 :         group->poller = SPDK_POLLER_REGISTER(bdev_nvme_poll, group, period);
    3780             : 
    3781          44 :         if (group->poller == NULL) {
    3782           0 :                 spdk_nvme_poll_group_destroy(group->group);
    3783           0 :                 return -1;
    3784             :         }
    3785             : 
    3786          44 :         if (spdk_interrupt_mode_is_enabled()) {
    3787           0 :                 spdk_poller_register_interrupt(group->poller, NULL, NULL);
    3788             : 
    3789           0 :                 fd = spdk_nvme_poll_group_get_fd(group->group);
    3790           0 :                 if (fd < 0) {
    3791           0 :                         spdk_nvme_poll_group_destroy(group->group);
    3792           0 :                         return -1;
    3793             :                 }
    3794             : 
    3795           0 :                 group->intr = SPDK_INTERRUPT_REGISTER(fd, bdev_nvme_interrupt_wrapper, group);
    3796           0 :                 if (!group->intr) {
    3797           0 :                         spdk_nvme_poll_group_destroy(group->group);
    3798           0 :                         return -1;
    3799             :                 }
    3800           0 :         }
    3801             : 
    3802          44 :         return 0;
    3803          44 : }
    3804             : 
    3805             : static void
    3806          44 : bdev_nvme_destroy_poll_group_cb(void *io_device, void *ctx_buf)
    3807             : {
    3808          44 :         struct nvme_poll_group *group = ctx_buf;
    3809             : 
    3810          44 :         assert(TAILQ_EMPTY(&group->qpair_list));
    3811             : 
    3812          44 :         if (group->accel_channel) {
    3813           0 :                 spdk_put_io_channel(group->accel_channel);
    3814           0 :         }
    3815             : 
    3816          44 :         if (spdk_interrupt_mode_is_enabled()) {
    3817           0 :                 spdk_interrupt_unregister(&group->intr);
    3818           0 :         }
    3819             : 
    3820          44 :         spdk_poller_unregister(&group->poller);
    3821          44 :         if (spdk_nvme_poll_group_destroy(group->group)) {
    3822           0 :                 SPDK_ERRLOG("Unable to destroy a poll group for the NVMe bdev module.\n");
    3823           0 :                 assert(false);
    3824             :         }
    3825          44 : }
    3826             : 
    3827             : static struct spdk_io_channel *
    3828           0 : bdev_nvme_get_io_channel(void *ctx)
    3829             : {
    3830           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3831             : 
    3832           0 :         return spdk_get_io_channel(nvme_bdev);
    3833             : }
    3834             : 
    3835             : static void *
    3836           0 : bdev_nvme_get_module_ctx(void *ctx)
    3837             : {
    3838           0 :         struct nvme_bdev *nvme_bdev = ctx;
    3839             :         struct nvme_ns *nvme_ns;
    3840             : 
    3841           0 :         if (!nvme_bdev || nvme_bdev->disk.module != &nvme_if) {
    3842           0 :                 return NULL;
    3843             :         }
    3844             : 
    3845           0 :         nvme_ns = TAILQ_FIRST(&nvme_bdev->nvme_ns_list);
    3846           0 :         if (!nvme_ns) {
    3847           0 :                 return NULL;
    3848             :         }
    3849             : 
    3850           0 :         return nvme_ns->ns;
    3851           0 : }
    3852             : 
    3853             : static const char *
    3854           0 : _nvme_ana_state_str(enum spdk_nvme_ana_state ana_state)
    3855             : {
    3856           0 :         switch (ana_state) {
    3857             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    3858           0 :                 return "optimized";
    3859             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    3860           0 :                 return "non_optimized";
    3861             :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    3862           0 :                 return "inaccessible";
    3863             :         case SPDK_NVME_ANA_PERSISTENT_LOSS_STATE:
    3864           0 :                 return "persistent_loss";
    3865             :         case SPDK_NVME_ANA_CHANGE_STATE:
    3866           0 :                 return "change";
    3867             :         default:
    3868           0 :                 return NULL;
    3869             :         }
    3870           0 : }
    3871             : 
    3872             : static int
    3873           8 : bdev_nvme_get_memory_domains(void *ctx, struct spdk_memory_domain **domains, int array_size)
    3874             : {
    3875           8 :         struct spdk_memory_domain **_domains = NULL;
    3876           8 :         struct nvme_bdev *nbdev = ctx;
    3877             :         struct nvme_ns *nvme_ns;
    3878           8 :         int i = 0, _array_size = array_size;
    3879           8 :         int rc = 0;
    3880             : 
    3881          22 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    3882          14 :                 if (domains && array_size >= i) {
    3883          11 :                         _domains = &domains[i];
    3884          11 :                 } else {
    3885           3 :                         _domains = NULL;
    3886             :                 }
    3887          14 :                 rc = spdk_nvme_ctrlr_get_memory_domains(nvme_ns->ctrlr->ctrlr, _domains, _array_size);
    3888          14 :                 if (rc > 0) {
    3889          13 :                         i += rc;
    3890          13 :                         if (_array_size >= rc) {
    3891           9 :                                 _array_size -= rc;
    3892           9 :                         } else {
    3893           4 :                                 _array_size = 0;
    3894             :                         }
    3895          14 :                 } else if (rc < 0) {
    3896           0 :                         return rc;
    3897             :                 }
    3898          14 :         }
    3899             : 
    3900           8 :         return i;
    3901           8 : }
    3902             : 
    3903             : static const char *
    3904           0 : nvme_ctrlr_get_state_str(struct nvme_ctrlr *nvme_ctrlr)
    3905             : {
    3906           0 :         if (nvme_ctrlr->destruct) {
    3907           0 :                 return "deleting";
    3908           0 :         } else if (spdk_nvme_ctrlr_is_failed(nvme_ctrlr->ctrlr)) {
    3909           0 :                 return "failed";
    3910           0 :         } else if (nvme_ctrlr->resetting) {
    3911           0 :                 return "resetting";
    3912           0 :         } else if (nvme_ctrlr->reconnect_is_delayed > 0) {
    3913           0 :                 return "reconnect_is_delayed";
    3914           0 :         } else if (nvme_ctrlr->disabled) {
    3915           0 :                 return "disabled";
    3916             :         } else {
    3917           0 :                 return "enabled";
    3918             :         }
    3919           0 : }
    3920             : 
    3921             : void
    3922           0 : nvme_ctrlr_info_json(struct spdk_json_write_ctx *w, struct nvme_ctrlr *nvme_ctrlr)
    3923             : {
    3924             :         struct spdk_nvme_transport_id *trid;
    3925             :         const struct spdk_nvme_ctrlr_opts *opts;
    3926             :         const struct spdk_nvme_ctrlr_data *cdata;
    3927             :         struct nvme_path_id *path_id;
    3928             :         int32_t numa_id;
    3929             : 
    3930           0 :         spdk_json_write_object_begin(w);
    3931             : 
    3932           0 :         spdk_json_write_named_string(w, "state", nvme_ctrlr_get_state_str(nvme_ctrlr));
    3933             : 
    3934             : #ifdef SPDK_CONFIG_NVME_CUSE
    3935             :         size_t cuse_name_size = 128;
    3936             :         char cuse_name[cuse_name_size];
    3937             : 
    3938             :         int rc = spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr, cuse_name, &cuse_name_size);
    3939             :         if (rc == 0) {
    3940             :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    3941             :         }
    3942             : #endif
    3943           0 :         trid = &nvme_ctrlr->active_path_id->trid;
    3944           0 :         spdk_json_write_named_object_begin(w, "trid");
    3945           0 :         nvme_bdev_dump_trid_json(trid, w);
    3946           0 :         spdk_json_write_object_end(w);
    3947             : 
    3948           0 :         path_id = TAILQ_NEXT(nvme_ctrlr->active_path_id, link);
    3949           0 :         if (path_id != NULL) {
    3950           0 :                 spdk_json_write_named_array_begin(w, "alternate_trids");
    3951           0 :                 do {
    3952           0 :                         trid = &path_id->trid;
    3953           0 :                         spdk_json_write_object_begin(w);
    3954           0 :                         nvme_bdev_dump_trid_json(trid, w);
    3955           0 :                         spdk_json_write_object_end(w);
    3956             : 
    3957           0 :                         path_id = TAILQ_NEXT(path_id, link);
    3958           0 :                 } while (path_id != NULL);
    3959           0 :                 spdk_json_write_array_end(w);
    3960           0 :         }
    3961             : 
    3962           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    3963           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    3964             : 
    3965           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    3966           0 :         spdk_json_write_named_object_begin(w, "host");
    3967           0 :         spdk_json_write_named_string(w, "nqn", opts->hostnqn);
    3968           0 :         spdk_json_write_named_string(w, "addr", opts->src_addr);
    3969           0 :         spdk_json_write_named_string(w, "svcid", opts->src_svcid);
    3970           0 :         spdk_json_write_object_end(w);
    3971             : 
    3972           0 :         numa_id = spdk_nvme_ctrlr_get_numa_id(nvme_ctrlr->ctrlr);
    3973           0 :         if (numa_id != SPDK_ENV_NUMA_ID_ANY) {
    3974           0 :                 spdk_json_write_named_uint32(w, "numa_id", numa_id);
    3975           0 :         }
    3976           0 :         spdk_json_write_object_end(w);
    3977           0 : }
    3978             : 
    3979             : static void
    3980           0 : nvme_namespace_info_json(struct spdk_json_write_ctx *w,
    3981             :                          struct nvme_ns *nvme_ns)
    3982             : {
    3983             :         struct spdk_nvme_ns *ns;
    3984             :         struct spdk_nvme_ctrlr *ctrlr;
    3985             :         const struct spdk_nvme_ctrlr_data *cdata;
    3986             :         const struct spdk_nvme_transport_id *trid;
    3987             :         union spdk_nvme_vs_register vs;
    3988             :         const struct spdk_nvme_ns_data *nsdata;
    3989             :         char buf[128];
    3990             : 
    3991           0 :         ns = nvme_ns->ns;
    3992           0 :         if (ns == NULL) {
    3993           0 :                 return;
    3994             :         }
    3995             : 
    3996           0 :         ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    3997             : 
    3998           0 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    3999           0 :         trid = spdk_nvme_ctrlr_get_transport_id(ctrlr);
    4000           0 :         vs = spdk_nvme_ctrlr_get_regs_vs(ctrlr);
    4001             : 
    4002           0 :         spdk_json_write_object_begin(w);
    4003             : 
    4004           0 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    4005           0 :                 spdk_json_write_named_string(w, "pci_address", trid->traddr);
    4006           0 :         }
    4007             : 
    4008           0 :         spdk_json_write_named_object_begin(w, "trid");
    4009             : 
    4010           0 :         nvme_bdev_dump_trid_json(trid, w);
    4011             : 
    4012           0 :         spdk_json_write_object_end(w);
    4013             : 
    4014             : #ifdef SPDK_CONFIG_NVME_CUSE
    4015             :         size_t cuse_name_size = 128;
    4016             :         char cuse_name[cuse_name_size];
    4017             : 
    4018             :         int rc = spdk_nvme_cuse_get_ns_name(ctrlr, spdk_nvme_ns_get_id(ns),
    4019             :                                             cuse_name, &cuse_name_size);
    4020             :         if (rc == 0) {
    4021             :                 spdk_json_write_named_string(w, "cuse_device", cuse_name);
    4022             :         }
    4023             : #endif
    4024             : 
    4025           0 :         spdk_json_write_named_object_begin(w, "ctrlr_data");
    4026             : 
    4027           0 :         spdk_json_write_named_uint16(w, "cntlid", cdata->cntlid);
    4028             : 
    4029           0 :         spdk_json_write_named_string_fmt(w, "vendor_id", "0x%04x", cdata->vid);
    4030             : 
    4031           0 :         snprintf(buf, sizeof(cdata->mn) + 1, "%s", cdata->mn);
    4032           0 :         spdk_str_trim(buf);
    4033           0 :         spdk_json_write_named_string(w, "model_number", buf);
    4034             : 
    4035           0 :         snprintf(buf, sizeof(cdata->sn) + 1, "%s", cdata->sn);
    4036           0 :         spdk_str_trim(buf);
    4037           0 :         spdk_json_write_named_string(w, "serial_number", buf);
    4038             : 
    4039           0 :         snprintf(buf, sizeof(cdata->fr) + 1, "%s", cdata->fr);
    4040           0 :         spdk_str_trim(buf);
    4041           0 :         spdk_json_write_named_string(w, "firmware_revision", buf);
    4042             : 
    4043           0 :         if (cdata->subnqn[0] != '\0') {
    4044           0 :                 spdk_json_write_named_string(w, "subnqn", cdata->subnqn);
    4045           0 :         }
    4046             : 
    4047           0 :         spdk_json_write_named_object_begin(w, "oacs");
    4048             : 
    4049           0 :         spdk_json_write_named_uint32(w, "security", cdata->oacs.security);
    4050           0 :         spdk_json_write_named_uint32(w, "format", cdata->oacs.format);
    4051           0 :         spdk_json_write_named_uint32(w, "firmware", cdata->oacs.firmware);
    4052           0 :         spdk_json_write_named_uint32(w, "ns_manage", cdata->oacs.ns_manage);
    4053             : 
    4054           0 :         spdk_json_write_object_end(w);
    4055             : 
    4056           0 :         spdk_json_write_named_bool(w, "multi_ctrlr", cdata->cmic.multi_ctrlr);
    4057           0 :         spdk_json_write_named_bool(w, "ana_reporting", cdata->cmic.ana_reporting);
    4058             : 
    4059           0 :         spdk_json_write_object_end(w);
    4060             : 
    4061           0 :         spdk_json_write_named_object_begin(w, "vs");
    4062             : 
    4063           0 :         spdk_json_write_name(w, "nvme_version");
    4064           0 :         if (vs.bits.ter) {
    4065           0 :                 spdk_json_write_string_fmt(w, "%u.%u.%u", vs.bits.mjr, vs.bits.mnr, vs.bits.ter);
    4066           0 :         } else {
    4067           0 :                 spdk_json_write_string_fmt(w, "%u.%u", vs.bits.mjr, vs.bits.mnr);
    4068             :         }
    4069             : 
    4070           0 :         spdk_json_write_object_end(w);
    4071             : 
    4072           0 :         nsdata = spdk_nvme_ns_get_data(ns);
    4073             : 
    4074           0 :         spdk_json_write_named_object_begin(w, "ns_data");
    4075             : 
    4076           0 :         spdk_json_write_named_uint32(w, "id", spdk_nvme_ns_get_id(ns));
    4077             : 
    4078           0 :         if (cdata->cmic.ana_reporting) {
    4079           0 :                 spdk_json_write_named_string(w, "ana_state",
    4080           0 :                                              _nvme_ana_state_str(nvme_ns->ana_state));
    4081           0 :         }
    4082             : 
    4083           0 :         spdk_json_write_named_bool(w, "can_share", nsdata->nmic.can_share);
    4084             : 
    4085           0 :         spdk_json_write_object_end(w);
    4086             : 
    4087           0 :         if (cdata->oacs.security) {
    4088           0 :                 spdk_json_write_named_object_begin(w, "security");
    4089             : 
    4090           0 :                 spdk_json_write_named_bool(w, "opal", nvme_ns->bdev->opal);
    4091             : 
    4092           0 :                 spdk_json_write_object_end(w);
    4093           0 :         }
    4094             : 
    4095           0 :         spdk_json_write_object_end(w);
    4096           0 : }
    4097             : 
    4098             : static const char *
    4099           0 : nvme_bdev_get_mp_policy_str(struct nvme_bdev *nbdev)
    4100             : {
    4101           0 :         switch (nbdev->mp_policy) {
    4102             :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    4103           0 :                 return "active_passive";
    4104             :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    4105           0 :                 return "active_active";
    4106             :         default:
    4107           0 :                 assert(false);
    4108             :                 return "invalid";
    4109             :         }
    4110           0 : }
    4111             : 
    4112             : static const char *
    4113           0 : nvme_bdev_get_mp_selector_str(struct nvme_bdev *nbdev)
    4114             : {
    4115           0 :         switch (nbdev->mp_selector) {
    4116             :         case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    4117           0 :                 return "round_robin";
    4118             :         case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    4119           0 :                 return "queue_depth";
    4120             :         default:
    4121           0 :                 assert(false);
    4122             :                 return "invalid";
    4123             :         }
    4124           0 : }
    4125             : 
    4126             : static int
    4127           0 : bdev_nvme_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
    4128             : {
    4129           0 :         struct nvme_bdev *nvme_bdev = ctx;
    4130             :         struct nvme_ns *nvme_ns;
    4131             : 
    4132           0 :         pthread_mutex_lock(&nvme_bdev->mutex);
    4133           0 :         spdk_json_write_named_array_begin(w, "nvme");
    4134           0 :         TAILQ_FOREACH(nvme_ns, &nvme_bdev->nvme_ns_list, tailq) {
    4135           0 :                 nvme_namespace_info_json(w, nvme_ns);
    4136           0 :         }
    4137           0 :         spdk_json_write_array_end(w);
    4138           0 :         spdk_json_write_named_string(w, "mp_policy", nvme_bdev_get_mp_policy_str(nvme_bdev));
    4139           0 :         if (nvme_bdev->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    4140           0 :                 spdk_json_write_named_string(w, "selector", nvme_bdev_get_mp_selector_str(nvme_bdev));
    4141           0 :                 if (nvme_bdev->mp_selector == BDEV_NVME_MP_SELECTOR_ROUND_ROBIN) {
    4142           0 :                         spdk_json_write_named_uint32(w, "rr_min_io", nvme_bdev->rr_min_io);
    4143           0 :                 }
    4144           0 :         }
    4145           0 :         pthread_mutex_unlock(&nvme_bdev->mutex);
    4146             : 
    4147           0 :         return 0;
    4148             : }
    4149             : 
    4150             : static void
    4151           0 : bdev_nvme_write_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
    4152             : {
    4153             :         /* No config per bdev needed */
    4154           0 : }
    4155             : 
    4156             : static uint64_t
    4157           0 : bdev_nvme_get_spin_time(struct spdk_io_channel *ch)
    4158             : {
    4159           0 :         struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
    4160             :         struct nvme_io_path *io_path;
    4161             :         struct nvme_poll_group *group;
    4162           0 :         uint64_t spin_time = 0;
    4163             : 
    4164           0 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    4165           0 :                 group = io_path->qpair->group;
    4166             : 
    4167           0 :                 if (!group || !group->collect_spin_stat) {
    4168           0 :                         continue;
    4169             :                 }
    4170             : 
    4171           0 :                 if (group->end_ticks != 0) {
    4172           0 :                         group->spin_ticks += (group->end_ticks - group->start_ticks);
    4173           0 :                         group->end_ticks = 0;
    4174           0 :                 }
    4175             : 
    4176           0 :                 spin_time += group->spin_ticks;
    4177           0 :                 group->start_ticks = 0;
    4178           0 :                 group->spin_ticks = 0;
    4179           0 :         }
    4180             : 
    4181           0 :         return (spin_time * 1000000ULL) / spdk_get_ticks_hz();
    4182             : }
    4183             : 
    4184             : static void
    4185           0 : bdev_nvme_reset_device_stat(void *ctx)
    4186             : {
    4187           0 :         struct nvme_bdev *nbdev = ctx;
    4188             : 
    4189           0 :         if (nbdev->err_stat != NULL) {
    4190           0 :                 memset(nbdev->err_stat, 0, sizeof(struct nvme_error_stat));
    4191           0 :         }
    4192           0 : }
    4193             : 
    4194             : /* JSON string should be lowercases and underscore delimited string. */
    4195             : static void
    4196           0 : bdev_nvme_format_nvme_status(char *dst, const char *src)
    4197             : {
    4198             :         char tmp[256];
    4199             : 
    4200           0 :         spdk_strcpy_replace(dst, 256, src, " - ", "_");
    4201           0 :         spdk_strcpy_replace(tmp, 256, dst, "-", "_");
    4202           0 :         spdk_strcpy_replace(dst, 256, tmp, " ", "_");
    4203           0 :         spdk_strlwr(dst);
    4204           0 : }
    4205             : 
    4206             : static void
    4207           0 : bdev_nvme_dump_device_stat_json(void *ctx, struct spdk_json_write_ctx *w)
    4208             : {
    4209           0 :         struct nvme_bdev *nbdev = ctx;
    4210           0 :         struct spdk_nvme_status status = {};
    4211             :         uint16_t sct, sc;
    4212             :         char status_json[256];
    4213             :         const char *status_str;
    4214             : 
    4215           0 :         if (nbdev->err_stat == NULL) {
    4216           0 :                 return;
    4217             :         }
    4218             : 
    4219           0 :         spdk_json_write_named_object_begin(w, "nvme_error");
    4220             : 
    4221           0 :         spdk_json_write_named_object_begin(w, "status_type");
    4222           0 :         for (sct = 0; sct < 8; sct++) {
    4223           0 :                 if (nbdev->err_stat->status_type[sct] == 0) {
    4224           0 :                         continue;
    4225             :                 }
    4226           0 :                 status.sct = sct;
    4227             : 
    4228           0 :                 status_str = spdk_nvme_cpl_get_status_type_string(&status);
    4229           0 :                 assert(status_str != NULL);
    4230           0 :                 bdev_nvme_format_nvme_status(status_json, status_str);
    4231             : 
    4232           0 :                 spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status_type[sct]);
    4233           0 :         }
    4234           0 :         spdk_json_write_object_end(w);
    4235             : 
    4236           0 :         spdk_json_write_named_object_begin(w, "status_code");
    4237           0 :         for (sct = 0; sct < 4; sct++) {
    4238           0 :                 status.sct = sct;
    4239           0 :                 for (sc = 0; sc < 256; sc++) {
    4240           0 :                         if (nbdev->err_stat->status[sct][sc] == 0) {
    4241           0 :                                 continue;
    4242             :                         }
    4243           0 :                         status.sc = sc;
    4244             : 
    4245           0 :                         status_str = spdk_nvme_cpl_get_status_string(&status);
    4246           0 :                         assert(status_str != NULL);
    4247           0 :                         bdev_nvme_format_nvme_status(status_json, status_str);
    4248             : 
    4249           0 :                         spdk_json_write_named_uint32(w, status_json, nbdev->err_stat->status[sct][sc]);
    4250           0 :                 }
    4251           0 :         }
    4252           0 :         spdk_json_write_object_end(w);
    4253             : 
    4254           0 :         spdk_json_write_object_end(w);
    4255           0 : }
    4256             : 
    4257             : static bool
    4258           0 : bdev_nvme_accel_sequence_supported(void *ctx, enum spdk_bdev_io_type type)
    4259             : {
    4260           0 :         struct nvme_bdev *nbdev = ctx;
    4261             :         struct spdk_nvme_ctrlr *ctrlr;
    4262             : 
    4263           0 :         if (!g_opts.allow_accel_sequence) {
    4264           0 :                 return false;
    4265             :         }
    4266             : 
    4267           0 :         switch (type) {
    4268             :         case SPDK_BDEV_IO_TYPE_WRITE:
    4269             :         case SPDK_BDEV_IO_TYPE_READ:
    4270           0 :                 break;
    4271             :         default:
    4272           0 :                 return false;
    4273             :         }
    4274             : 
    4275           0 :         ctrlr = bdev_nvme_get_ctrlr(&nbdev->disk);
    4276           0 :         assert(ctrlr != NULL);
    4277             : 
    4278           0 :         return spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_ACCEL_SEQUENCE_SUPPORTED;
    4279           0 : }
    4280             : 
    4281             : static const struct spdk_bdev_fn_table nvmelib_fn_table = {
    4282             :         .destruct                       = bdev_nvme_destruct,
    4283             :         .submit_request                 = bdev_nvme_submit_request,
    4284             :         .io_type_supported              = bdev_nvme_io_type_supported,
    4285             :         .get_io_channel                 = bdev_nvme_get_io_channel,
    4286             :         .dump_info_json                 = bdev_nvme_dump_info_json,
    4287             :         .write_config_json              = bdev_nvme_write_config_json,
    4288             :         .get_spin_time                  = bdev_nvme_get_spin_time,
    4289             :         .get_module_ctx                 = bdev_nvme_get_module_ctx,
    4290             :         .get_memory_domains             = bdev_nvme_get_memory_domains,
    4291             :         .accel_sequence_supported       = bdev_nvme_accel_sequence_supported,
    4292             :         .reset_device_stat              = bdev_nvme_reset_device_stat,
    4293             :         .dump_device_stat_json          = bdev_nvme_dump_device_stat_json,
    4294             : };
    4295             : 
    4296             : typedef int (*bdev_nvme_parse_ana_log_page_cb)(
    4297             :         const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg);
    4298             : 
    4299             : static int
    4300          41 : bdev_nvme_parse_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    4301             :                              bdev_nvme_parse_ana_log_page_cb cb_fn, void *cb_arg)
    4302             : {
    4303             :         struct spdk_nvme_ana_group_descriptor *copied_desc;
    4304             :         uint8_t *orig_desc;
    4305             :         uint32_t i, desc_size, copy_len;
    4306          41 :         int rc = 0;
    4307             : 
    4308          41 :         if (nvme_ctrlr->ana_log_page == NULL) {
    4309           0 :                 return -EINVAL;
    4310             :         }
    4311             : 
    4312          41 :         copied_desc = nvme_ctrlr->copied_ana_desc;
    4313             : 
    4314          41 :         orig_desc = (uint8_t *)nvme_ctrlr->ana_log_page + sizeof(struct spdk_nvme_ana_page);
    4315          41 :         copy_len = nvme_ctrlr->max_ana_log_page_size - sizeof(struct spdk_nvme_ana_page);
    4316             : 
    4317          71 :         for (i = 0; i < nvme_ctrlr->ana_log_page->num_ana_group_desc; i++) {
    4318          66 :                 memcpy(copied_desc, orig_desc, copy_len);
    4319             : 
    4320          66 :                 rc = cb_fn(copied_desc, cb_arg);
    4321          66 :                 if (rc != 0) {
    4322          36 :                         break;
    4323             :                 }
    4324             : 
    4325          30 :                 desc_size = sizeof(struct spdk_nvme_ana_group_descriptor) +
    4326          30 :                             copied_desc->num_of_nsid * sizeof(uint32_t);
    4327          30 :                 orig_desc += desc_size;
    4328          30 :                 copy_len -= desc_size;
    4329          30 :         }
    4330             : 
    4331          41 :         return rc;
    4332          41 : }
    4333             : 
    4334             : static int
    4335           5 : nvme_ns_ana_transition_timedout(void *ctx)
    4336             : {
    4337           5 :         struct nvme_ns *nvme_ns = ctx;
    4338             : 
    4339           5 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    4340           5 :         nvme_ns->ana_transition_timedout = true;
    4341             : 
    4342           5 :         return SPDK_POLLER_BUSY;
    4343             : }
    4344             : 
    4345             : static void
    4346          45 : _nvme_ns_set_ana_state(struct nvme_ns *nvme_ns,
    4347             :                        const struct spdk_nvme_ana_group_descriptor *desc)
    4348             : {
    4349             :         const struct spdk_nvme_ctrlr_data *cdata;
    4350             : 
    4351          45 :         nvme_ns->ana_group_id = desc->ana_group_id;
    4352          45 :         nvme_ns->ana_state = desc->ana_state;
    4353          45 :         nvme_ns->ana_state_updating = false;
    4354             : 
    4355          45 :         switch (nvme_ns->ana_state) {
    4356             :         case SPDK_NVME_ANA_OPTIMIZED_STATE:
    4357             :         case SPDK_NVME_ANA_NON_OPTIMIZED_STATE:
    4358          38 :                 nvme_ns->ana_transition_timedout = false;
    4359          38 :                 spdk_poller_unregister(&nvme_ns->anatt_timer);
    4360          38 :                 break;
    4361             : 
    4362             :         case SPDK_NVME_ANA_INACCESSIBLE_STATE:
    4363             :         case SPDK_NVME_ANA_CHANGE_STATE:
    4364           6 :                 if (nvme_ns->anatt_timer != NULL) {
    4365           1 :                         break;
    4366             :                 }
    4367             : 
    4368           5 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    4369           5 :                 nvme_ns->anatt_timer = SPDK_POLLER_REGISTER(nvme_ns_ana_transition_timedout,
    4370             :                                        nvme_ns,
    4371             :                                        cdata->anatt * SPDK_SEC_TO_USEC);
    4372           5 :                 break;
    4373             :         default:
    4374           1 :                 break;
    4375             :         }
    4376          45 : }
    4377             : 
    4378             : static int
    4379          59 : nvme_ns_set_ana_state(const struct spdk_nvme_ana_group_descriptor *desc, void *cb_arg)
    4380             : {
    4381          59 :         struct nvme_ns *nvme_ns = cb_arg;
    4382             :         uint32_t i;
    4383             : 
    4384          59 :         assert(nvme_ns->ns != NULL);
    4385             : 
    4386          81 :         for (i = 0; i < desc->num_of_nsid; i++) {
    4387          58 :                 if (desc->nsid[i] != spdk_nvme_ns_get_id(nvme_ns->ns)) {
    4388          22 :                         continue;
    4389             :                 }
    4390             : 
    4391          36 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    4392          36 :                 return 1;
    4393             :         }
    4394             : 
    4395          23 :         return 0;
    4396          59 : }
    4397             : 
    4398             : static int
    4399           5 : nvme_generate_uuid(const char *sn, uint32_t nsid, struct spdk_uuid *uuid)
    4400             : {
    4401           5 :         int rc = 0;
    4402             :         struct spdk_uuid new_uuid, namespace_uuid;
    4403           5 :         char merged_str[SPDK_NVME_CTRLR_SN_LEN + NSID_STR_LEN + 1] = {'\0'};
    4404             :         /* This namespace UUID was generated using uuid_generate() method. */
    4405           5 :         const char *namespace_str = {"edaed2de-24bc-4b07-b559-f47ecbe730fd"};
    4406             :         int size;
    4407             : 
    4408           5 :         assert(strlen(sn) <= SPDK_NVME_CTRLR_SN_LEN);
    4409             : 
    4410           5 :         spdk_uuid_set_null(&new_uuid);
    4411           5 :         spdk_uuid_set_null(&namespace_uuid);
    4412             : 
    4413           5 :         size = snprintf(merged_str, sizeof(merged_str), "%s%"PRIu32, sn, nsid);
    4414           5 :         if (size <= 0 || (unsigned long)size >= sizeof(merged_str)) {
    4415           0 :                 return -EINVAL;
    4416             :         }
    4417             : 
    4418           5 :         spdk_uuid_parse(&namespace_uuid, namespace_str);
    4419             : 
    4420           5 :         rc = spdk_uuid_generate_sha1(&new_uuid, &namespace_uuid, merged_str, size);
    4421           5 :         if (rc == 0) {
    4422           5 :                 memcpy(uuid, &new_uuid, sizeof(struct spdk_uuid));
    4423           5 :         }
    4424             : 
    4425           5 :         return rc;
    4426           5 : }
    4427             : 
    4428             : static int
    4429          38 : nvme_disk_create(struct spdk_bdev *disk, const char *base_name,
    4430             :                  struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns,
    4431             :                  struct spdk_bdev_nvme_ctrlr_opts *bdev_opts, void *ctx)
    4432             : {
    4433             :         const struct spdk_uuid          *uuid;
    4434             :         const uint8_t *nguid;
    4435             :         const struct spdk_nvme_ctrlr_data *cdata;
    4436             :         const struct spdk_nvme_ns_data  *nsdata;
    4437             :         const struct spdk_nvme_ctrlr_opts *opts;
    4438             :         enum spdk_nvme_csi              csi;
    4439             :         uint32_t atomic_bs, phys_bs, bs;
    4440          38 :         char sn_tmp[SPDK_NVME_CTRLR_SN_LEN + 1] = {'\0'};
    4441             :         int rc;
    4442             : 
    4443          38 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    4444          38 :         csi = spdk_nvme_ns_get_csi(ns);
    4445          38 :         opts = spdk_nvme_ctrlr_get_opts(ctrlr);
    4446             : 
    4447          38 :         switch (csi) {
    4448             :         case SPDK_NVME_CSI_NVM:
    4449          38 :                 disk->product_name = "NVMe disk";
    4450          38 :                 break;
    4451             :         case SPDK_NVME_CSI_ZNS:
    4452           0 :                 disk->product_name = "NVMe ZNS disk";
    4453           0 :                 disk->zoned = true;
    4454           0 :                 disk->zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    4455           0 :                 disk->max_zone_append_size = spdk_nvme_zns_ctrlr_get_max_zone_append_size(ctrlr) /
    4456           0 :                                              spdk_nvme_ns_get_extended_sector_size(ns);
    4457           0 :                 disk->max_open_zones = spdk_nvme_zns_ns_get_max_open_zones(ns);
    4458           0 :                 disk->max_active_zones = spdk_nvme_zns_ns_get_max_active_zones(ns);
    4459           0 :                 break;
    4460             :         default:
    4461           0 :                 if (bdev_opts->allow_unrecognized_csi) {
    4462           0 :                         disk->product_name = "NVMe Passthrough disk";
    4463           0 :                         break;
    4464             :                 }
    4465           0 :                 SPDK_ERRLOG("unsupported CSI: %u\n", csi);
    4466           0 :                 return -ENOTSUP;
    4467             :         }
    4468             : 
    4469          38 :         nguid = spdk_nvme_ns_get_nguid(ns);
    4470          38 :         if (!nguid) {
    4471          38 :                 uuid = spdk_nvme_ns_get_uuid(ns);
    4472          38 :                 if (uuid) {
    4473          12 :                         disk->uuid = *uuid;
    4474          38 :                 } else if (g_opts.generate_uuids) {
    4475           0 :                         spdk_strcpy_pad(sn_tmp, cdata->sn, SPDK_NVME_CTRLR_SN_LEN, '\0');
    4476           0 :                         rc = nvme_generate_uuid(sn_tmp, spdk_nvme_ns_get_id(ns), &disk->uuid);
    4477           0 :                         if (rc < 0) {
    4478           0 :                                 SPDK_ERRLOG("UUID generation failed (%s)\n", spdk_strerror(-rc));
    4479           0 :                                 return rc;
    4480             :                         }
    4481           0 :                 }
    4482          38 :         } else {
    4483           0 :                 memcpy(&disk->uuid, nguid, sizeof(disk->uuid));
    4484             :         }
    4485             : 
    4486          38 :         disk->name = spdk_sprintf_alloc("%sn%d", base_name, spdk_nvme_ns_get_id(ns));
    4487          38 :         if (!disk->name) {
    4488           0 :                 return -ENOMEM;
    4489             :         }
    4490             : 
    4491          38 :         disk->write_cache = 0;
    4492          38 :         if (cdata->vwc.present) {
    4493             :                 /* Enable if the Volatile Write Cache exists */
    4494           0 :                 disk->write_cache = 1;
    4495           0 :         }
    4496          38 :         if (cdata->oncs.write_zeroes) {
    4497           0 :                 disk->max_write_zeroes = UINT16_MAX + 1;
    4498           0 :         }
    4499          38 :         disk->blocklen = spdk_nvme_ns_get_extended_sector_size(ns);
    4500          38 :         disk->blockcnt = spdk_nvme_ns_get_num_sectors(ns);
    4501          38 :         disk->max_segment_size = spdk_nvme_ctrlr_get_max_xfer_size(ctrlr);
    4502          38 :         disk->ctratt.raw = cdata->ctratt.raw;
    4503             :         /* NVMe driver will split one request into multiple requests
    4504             :          * based on MDTS and stripe boundary, the bdev layer will use
    4505             :          * max_segment_size and max_num_segments to split one big IO
    4506             :          * into multiple requests, then small request can't run out
    4507             :          * of NVMe internal requests data structure.
    4508             :          */
    4509          38 :         if (opts && opts->io_queue_requests) {
    4510           0 :                 disk->max_num_segments = opts->io_queue_requests / 2;
    4511           0 :         }
    4512          38 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) & SPDK_NVME_CTRLR_SGL_SUPPORTED) {
    4513             :                 /* The nvme driver will try to split I/O that have too many
    4514             :                  * SGEs, but it doesn't work if that last SGE doesn't end on
    4515             :                  * an aggregate total that is block aligned. The bdev layer has
    4516             :                  * a more robust splitting framework, so use that instead for
    4517             :                  * this case. (See issue #3269.)
    4518             :                  */
    4519           0 :                 uint16_t max_sges = spdk_nvme_ctrlr_get_max_sges(ctrlr);
    4520             : 
    4521           0 :                 if (disk->max_num_segments == 0) {
    4522           0 :                         disk->max_num_segments = max_sges;
    4523           0 :                 } else {
    4524           0 :                         disk->max_num_segments = spdk_min(disk->max_num_segments, max_sges);
    4525             :                 }
    4526           0 :         }
    4527          38 :         disk->optimal_io_boundary = spdk_nvme_ns_get_optimal_io_boundary(ns);
    4528             : 
    4529          38 :         nsdata = spdk_nvme_ns_get_data(ns);
    4530          38 :         bs = spdk_nvme_ns_get_sector_size(ns);
    4531          38 :         atomic_bs = bs;
    4532          38 :         phys_bs = bs;
    4533          38 :         if (nsdata->nabo == 0) {
    4534          38 :                 if (nsdata->nsfeat.ns_atomic_write_unit && nsdata->nawupf) {
    4535           0 :                         atomic_bs = bs * (1 + nsdata->nawupf);
    4536           0 :                 } else {
    4537          38 :                         atomic_bs = bs * (1 + cdata->awupf);
    4538             :                 }
    4539          38 :         }
    4540          38 :         if (nsdata->nsfeat.optperf) {
    4541           0 :                 phys_bs = bs * (1 + nsdata->npwg);
    4542           0 :         }
    4543          38 :         disk->phys_blocklen = spdk_min(phys_bs, atomic_bs);
    4544             : 
    4545          38 :         disk->md_len = spdk_nvme_ns_get_md_size(ns);
    4546          38 :         if (disk->md_len != 0) {
    4547           0 :                 disk->md_interleave = nsdata->flbas.extended;
    4548           0 :                 disk->dif_type = (enum spdk_dif_type)spdk_nvme_ns_get_pi_type(ns);
    4549           0 :                 if (disk->dif_type != SPDK_DIF_DISABLE) {
    4550           0 :                         disk->dif_is_head_of_md = nsdata->dps.md_start;
    4551           0 :                         disk->dif_check_flags = bdev_opts->prchk_flags;
    4552           0 :                         disk->dif_pi_format = (enum spdk_dif_pi_format)spdk_nvme_ns_get_pi_format(ns);
    4553           0 :                 }
    4554           0 :         }
    4555             : 
    4556          38 :         if (!(spdk_nvme_ctrlr_get_flags(ctrlr) &
    4557             :               SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED)) {
    4558          38 :                 disk->acwu = 0;
    4559          38 :         } else if (nsdata->nsfeat.ns_atomic_write_unit) {
    4560           0 :                 disk->acwu = nsdata->nacwu + 1; /* 0-based */
    4561           0 :         } else {
    4562           0 :                 disk->acwu = cdata->acwu + 1; /* 0-based */
    4563             :         }
    4564             : 
    4565          38 :         if (cdata->oncs.copy) {
    4566             :                 /* For now bdev interface allows only single segment copy */
    4567           0 :                 disk->max_copy = nsdata->mssrl;
    4568           0 :         }
    4569             : 
    4570          38 :         disk->ctxt = ctx;
    4571          38 :         disk->fn_table = &nvmelib_fn_table;
    4572          38 :         disk->module = &nvme_if;
    4573             : 
    4574          38 :         disk->numa.id_valid = 1;
    4575          38 :         disk->numa.id = spdk_nvme_ctrlr_get_numa_id(ctrlr);
    4576             : 
    4577          38 :         return 0;
    4578          38 : }
    4579             : 
    4580             : static struct nvme_bdev *
    4581          38 : nvme_bdev_alloc(void)
    4582             : {
    4583             :         struct nvme_bdev *bdev;
    4584             :         int rc;
    4585             : 
    4586          38 :         bdev = calloc(1, sizeof(*bdev));
    4587          38 :         if (!bdev) {
    4588           0 :                 SPDK_ERRLOG("bdev calloc() failed\n");
    4589           0 :                 return NULL;
    4590             :         }
    4591             : 
    4592          38 :         if (g_opts.nvme_error_stat) {
    4593           0 :                 bdev->err_stat = calloc(1, sizeof(struct nvme_error_stat));
    4594           0 :                 if (!bdev->err_stat) {
    4595           0 :                         SPDK_ERRLOG("err_stat calloc() failed\n");
    4596           0 :                         free(bdev);
    4597           0 :                         return NULL;
    4598             :                 }
    4599           0 :         }
    4600             : 
    4601          38 :         rc = pthread_mutex_init(&bdev->mutex, NULL);
    4602          38 :         if (rc != 0) {
    4603           0 :                 free(bdev->err_stat);
    4604           0 :                 free(bdev);
    4605           0 :                 return NULL;
    4606             :         }
    4607             : 
    4608          38 :         bdev->ref = 1;
    4609          38 :         bdev->mp_policy = BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE;
    4610          38 :         bdev->mp_selector = BDEV_NVME_MP_SELECTOR_ROUND_ROBIN;
    4611          38 :         bdev->rr_min_io = UINT32_MAX;
    4612          38 :         TAILQ_INIT(&bdev->nvme_ns_list);
    4613             : 
    4614          38 :         return bdev;
    4615          38 : }
    4616             : 
    4617             : static int
    4618          38 : nvme_bdev_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4619             : {
    4620             :         struct nvme_bdev *bdev;
    4621          38 :         struct nvme_bdev_ctrlr *nbdev_ctrlr = nvme_ctrlr->nbdev_ctrlr;
    4622             :         int rc;
    4623             : 
    4624          38 :         bdev = nvme_bdev_alloc();
    4625          38 :         if (bdev == NULL) {
    4626           0 :                 SPDK_ERRLOG("Failed to allocate NVMe bdev\n");
    4627           0 :                 return -ENOMEM;
    4628             :         }
    4629             : 
    4630          38 :         bdev->opal = nvme_ctrlr->opal_dev != NULL;
    4631             : 
    4632          76 :         rc = nvme_disk_create(&bdev->disk, nbdev_ctrlr->name, nvme_ctrlr->ctrlr,
    4633          38 :                               nvme_ns->ns, &nvme_ctrlr->opts, bdev);
    4634          38 :         if (rc != 0) {
    4635           0 :                 SPDK_ERRLOG("Failed to create NVMe disk\n");
    4636           0 :                 nvme_bdev_free(bdev);
    4637           0 :                 return rc;
    4638             :         }
    4639             : 
    4640          76 :         spdk_io_device_register(bdev,
    4641             :                                 bdev_nvme_create_bdev_channel_cb,
    4642             :                                 bdev_nvme_destroy_bdev_channel_cb,
    4643             :                                 sizeof(struct nvme_bdev_channel),
    4644          38 :                                 bdev->disk.name);
    4645             : 
    4646          38 :         nvme_ns->bdev = bdev;
    4647          38 :         bdev->nsid = nvme_ns->id;
    4648          38 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4649             : 
    4650          38 :         bdev->nbdev_ctrlr = nbdev_ctrlr;
    4651          38 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->bdevs, bdev, tailq);
    4652             : 
    4653          38 :         rc = spdk_bdev_register(&bdev->disk);
    4654          38 :         if (rc != 0) {
    4655           1 :                 SPDK_ERRLOG("spdk_bdev_register() failed\n");
    4656           1 :                 spdk_io_device_unregister(bdev, NULL);
    4657           1 :                 nvme_ns->bdev = NULL;
    4658           1 :                 TAILQ_REMOVE(&nbdev_ctrlr->bdevs, bdev, tailq);
    4659           1 :                 nvme_bdev_free(bdev);
    4660           1 :                 return rc;
    4661             :         }
    4662             : 
    4663          37 :         return 0;
    4664          38 : }
    4665             : 
    4666             : static bool
    4667          23 : bdev_nvme_compare_ns(struct spdk_nvme_ns *ns1, struct spdk_nvme_ns *ns2)
    4668             : {
    4669             :         const struct spdk_nvme_ns_data *nsdata1, *nsdata2;
    4670             :         const struct spdk_uuid *uuid1, *uuid2;
    4671             : 
    4672          23 :         nsdata1 = spdk_nvme_ns_get_data(ns1);
    4673          23 :         nsdata2 = spdk_nvme_ns_get_data(ns2);
    4674          23 :         uuid1 = spdk_nvme_ns_get_uuid(ns1);
    4675          23 :         uuid2 = spdk_nvme_ns_get_uuid(ns2);
    4676             : 
    4677          71 :         return memcmp(nsdata1->nguid, nsdata2->nguid, sizeof(nsdata1->nguid)) == 0 &&
    4678          22 :                nsdata1->eui64 == nsdata2->eui64 &&
    4679          21 :                ((uuid1 == NULL && uuid2 == NULL) ||
    4680          29 :                 (uuid1 != NULL && uuid2 != NULL && spdk_uuid_compare(uuid1, uuid2) == 0)) &&
    4681          18 :                spdk_nvme_ns_get_csi(ns1) == spdk_nvme_ns_get_csi(ns2);
    4682             : }
    4683             : 
    4684             : static bool
    4685           0 : hotplug_probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    4686             :                  struct spdk_nvme_ctrlr_opts *opts)
    4687             : {
    4688             :         struct nvme_probe_skip_entry *entry;
    4689             : 
    4690           0 :         TAILQ_FOREACH(entry, &g_skipped_nvme_ctrlrs, tailq) {
    4691           0 :                 if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    4692           0 :                         return false;
    4693             :                 }
    4694           0 :         }
    4695             : 
    4696           0 :         opts->arbitration_burst = (uint8_t)g_opts.arbitration_burst;
    4697           0 :         opts->low_priority_weight = (uint8_t)g_opts.low_priority_weight;
    4698           0 :         opts->medium_priority_weight = (uint8_t)g_opts.medium_priority_weight;
    4699           0 :         opts->high_priority_weight = (uint8_t)g_opts.high_priority_weight;
    4700           0 :         opts->disable_read_ana_log_page = true;
    4701             : 
    4702           0 :         SPDK_DEBUGLOG(bdev_nvme, "Attaching to %s\n", trid->traddr);
    4703             : 
    4704           0 :         return true;
    4705           0 : }
    4706             : 
    4707             : static void
    4708           0 : nvme_abort_cpl(void *ctx, const struct spdk_nvme_cpl *cpl)
    4709             : {
    4710           0 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    4711             : 
    4712           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    4713           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "Abort failed. Resetting controller. sc is %u, sct is %u.\n",
    4714             :                                    cpl->status.sc, cpl->status.sct);
    4715           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4716           0 :         } else if (cpl->cdw0 & 0x1) {
    4717           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr, "Specified command could not be aborted.\n");
    4718           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4719           0 :         }
    4720           0 : }
    4721             : 
    4722             : static void
    4723           0 : timeout_cb(void *cb_arg, struct spdk_nvme_ctrlr *ctrlr,
    4724             :            struct spdk_nvme_qpair *qpair, uint16_t cid)
    4725             : {
    4726           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    4727             :         union spdk_nvme_csts_register csts;
    4728             :         int rc;
    4729             : 
    4730           0 :         assert(nvme_ctrlr->ctrlr == ctrlr);
    4731             : 
    4732           0 :         NVME_CTRLR_WARNLOG(nvme_ctrlr, "Warning: Detected a timeout. ctrlr=%p qpair=%p cid=%u\n",
    4733             :                            ctrlr, qpair, cid);
    4734             : 
    4735             :         /* Only try to read CSTS if it's a PCIe controller or we have a timeout on an I/O
    4736             :          * queue.  (Note: qpair == NULL when there's an admin cmd timeout.)  Otherwise we
    4737             :          * would submit another fabrics cmd on the admin queue to read CSTS and check for its
    4738             :          * completion recursively.
    4739             :          */
    4740           0 :         if (nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE || qpair != NULL) {
    4741           0 :                 csts = spdk_nvme_ctrlr_get_regs_csts(ctrlr);
    4742           0 :                 if (csts.bits.cfs) {
    4743           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Controller Fatal Status, reset required\n");
    4744           0 :                         bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4745           0 :                         return;
    4746             :                 }
    4747           0 :         }
    4748             : 
    4749           0 :         switch (g_opts.action_on_timeout) {
    4750             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT:
    4751           0 :                 if (qpair) {
    4752             :                         /* Don't send abort to ctrlr when ctrlr is not available. */
    4753           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4754           0 :                         if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    4755           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4756           0 :                                 NVME_CTRLR_NOTICELOG(nvme_ctrlr, "Quit abort. Ctrlr is not available.\n");
    4757           0 :                                 return;
    4758             :                         }
    4759           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4760             : 
    4761           0 :                         rc = spdk_nvme_ctrlr_cmd_abort(ctrlr, qpair, cid,
    4762           0 :                                                        nvme_abort_cpl, nvme_ctrlr);
    4763           0 :                         if (rc == 0) {
    4764           0 :                                 return;
    4765             :                         }
    4766             : 
    4767           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Unable to send abort. Resetting, rc is %d.\n", rc);
    4768           0 :                 }
    4769             : 
    4770             :         /* FALLTHROUGH */
    4771             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET:
    4772           0 :                 bdev_nvme_reset_ctrlr(nvme_ctrlr);
    4773           0 :                 break;
    4774             :         case SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE:
    4775           0 :                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "No action for nvme controller timeout.\n");
    4776           0 :                 break;
    4777             :         default:
    4778           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "An invalid timeout action value is found.\n");
    4779           0 :                 break;
    4780             :         }
    4781           0 : }
    4782             : 
    4783             : static struct nvme_ns *
    4784          51 : nvme_ns_alloc(void)
    4785             : {
    4786             :         struct nvme_ns *nvme_ns;
    4787             : 
    4788          51 :         nvme_ns = calloc(1, sizeof(struct nvme_ns));
    4789          51 :         if (nvme_ns == NULL) {
    4790           0 :                 return NULL;
    4791             :         }
    4792             : 
    4793          51 :         if (g_opts.io_path_stat) {
    4794           0 :                 nvme_ns->stat = calloc(1, sizeof(struct spdk_bdev_io_stat));
    4795           0 :                 if (nvme_ns->stat == NULL) {
    4796           0 :                         free(nvme_ns);
    4797           0 :                         return NULL;
    4798             :                 }
    4799           0 :                 spdk_bdev_reset_io_stat(nvme_ns->stat, SPDK_BDEV_RESET_STAT_MAXMIN);
    4800           0 :         }
    4801             : 
    4802          51 :         return nvme_ns;
    4803          51 : }
    4804             : 
    4805             : static void
    4806          51 : nvme_ns_free(struct nvme_ns *nvme_ns)
    4807             : {
    4808          51 :         free(nvme_ns->stat);
    4809          51 :         free(nvme_ns);
    4810          51 : }
    4811             : 
    4812             : static void
    4813          51 : nvme_ctrlr_populate_namespace_done(struct nvme_ns *nvme_ns, int rc)
    4814             : {
    4815          51 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4816          51 :         struct nvme_async_probe_ctx *ctx = nvme_ns->probe_ctx;
    4817             : 
    4818          51 :         if (rc == 0) {
    4819          49 :                 nvme_ns->probe_ctx = NULL;
    4820          49 :                 pthread_mutex_lock(&nvme_ctrlr->mutex);
    4821          49 :                 nvme_ctrlr->ref++;
    4822          49 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4823          49 :         } else {
    4824           2 :                 RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4825           2 :                 nvme_ns_free(nvme_ns);
    4826             :         }
    4827             : 
    4828          51 :         if (ctx) {
    4829          50 :                 ctx->populates_in_progress--;
    4830          50 :                 if (ctx->populates_in_progress == 0) {
    4831          12 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    4832          12 :                 }
    4833          50 :         }
    4834          51 : }
    4835             : 
    4836             : static void
    4837           2 : bdev_nvme_add_io_path(struct nvme_bdev_channel_iter *i,
    4838             :                       struct nvme_bdev *nbdev,
    4839             :                       struct nvme_bdev_channel *nbdev_ch, void *ctx)
    4840             : {
    4841           2 :         struct nvme_ns *nvme_ns = ctx;
    4842             :         int rc;
    4843             : 
    4844           2 :         rc = _bdev_nvme_add_io_path(nbdev_ch, nvme_ns);
    4845           2 :         if (rc != 0) {
    4846           0 :                 SPDK_ERRLOG("Failed to add I/O path to bdev_channel dynamically.\n");
    4847           0 :         }
    4848             : 
    4849           2 :         nvme_bdev_for_each_channel_continue(i, rc);
    4850           2 : }
    4851             : 
    4852             : static void
    4853           2 : bdev_nvme_delete_io_path(struct nvme_bdev_channel_iter *i,
    4854             :                          struct nvme_bdev *nbdev,
    4855             :                          struct nvme_bdev_channel *nbdev_ch, void *ctx)
    4856             : {
    4857           2 :         struct nvme_ns *nvme_ns = ctx;
    4858             :         struct nvme_io_path *io_path;
    4859             : 
    4860           2 :         io_path = _bdev_nvme_get_io_path(nbdev_ch, nvme_ns);
    4861           2 :         if (io_path != NULL) {
    4862           2 :                 _bdev_nvme_delete_io_path(nbdev_ch, io_path);
    4863           2 :         }
    4864             : 
    4865           2 :         nvme_bdev_for_each_channel_continue(i, 0);
    4866           2 : }
    4867             : 
    4868             : static void
    4869           0 : bdev_nvme_add_io_path_failed(struct nvme_bdev *nbdev, void *ctx, int status)
    4870             : {
    4871           0 :         struct nvme_ns *nvme_ns = ctx;
    4872             : 
    4873           0 :         nvme_ctrlr_populate_namespace_done(nvme_ns, -1);
    4874           0 : }
    4875             : 
    4876             : static void
    4877          12 : bdev_nvme_add_io_path_done(struct nvme_bdev *nbdev, void *ctx, int status)
    4878             : {
    4879          12 :         struct nvme_ns *nvme_ns = ctx;
    4880             : 
    4881          12 :         if (status == 0) {
    4882          12 :                 nvme_ctrlr_populate_namespace_done(nvme_ns, 0);
    4883          12 :         } else {
    4884             :                 /* Delete the added io_paths and fail populating the namespace. */
    4885           0 :                 nvme_bdev_for_each_channel(nbdev,
    4886             :                                            bdev_nvme_delete_io_path,
    4887           0 :                                            nvme_ns,
    4888             :                                            bdev_nvme_add_io_path_failed);
    4889             :         }
    4890          12 : }
    4891             : 
    4892             : static int
    4893          13 : nvme_bdev_add_ns(struct nvme_bdev *bdev, struct nvme_ns *nvme_ns)
    4894             : {
    4895             :         struct nvme_ns *tmp_ns;
    4896             :         const struct spdk_nvme_ns_data *nsdata;
    4897             : 
    4898          13 :         nsdata = spdk_nvme_ns_get_data(nvme_ns->ns);
    4899          13 :         if (!nsdata->nmic.can_share) {
    4900           0 :                 SPDK_ERRLOG("Namespace cannot be shared.\n");
    4901           0 :                 return -EINVAL;
    4902             :         }
    4903             : 
    4904          13 :         pthread_mutex_lock(&bdev->mutex);
    4905             : 
    4906          13 :         tmp_ns = TAILQ_FIRST(&bdev->nvme_ns_list);
    4907          13 :         assert(tmp_ns != NULL);
    4908             : 
    4909          13 :         if (tmp_ns->ns != NULL && !bdev_nvme_compare_ns(nvme_ns->ns, tmp_ns->ns)) {
    4910           1 :                 pthread_mutex_unlock(&bdev->mutex);
    4911           1 :                 SPDK_ERRLOG("Namespaces are not identical.\n");
    4912           1 :                 return -EINVAL;
    4913             :         }
    4914             : 
    4915          12 :         bdev->ref++;
    4916          12 :         TAILQ_INSERT_TAIL(&bdev->nvme_ns_list, nvme_ns, tailq);
    4917          12 :         nvme_ns->bdev = bdev;
    4918             : 
    4919          12 :         pthread_mutex_unlock(&bdev->mutex);
    4920             : 
    4921             :         /* Add nvme_io_path to nvme_bdev_channels dynamically. */
    4922          24 :         nvme_bdev_for_each_channel(bdev,
    4923             :                                    bdev_nvme_add_io_path,
    4924          12 :                                    nvme_ns,
    4925             :                                    bdev_nvme_add_io_path_done);
    4926             : 
    4927          12 :         return 0;
    4928          13 : }
    4929             : 
    4930             : static void
    4931          51 : nvme_ctrlr_populate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4932             : {
    4933             :         struct spdk_nvme_ns     *ns;
    4934             :         struct nvme_bdev        *bdev;
    4935          51 :         int                     rc = 0;
    4936             : 
    4937          51 :         ns = spdk_nvme_ctrlr_get_ns(nvme_ctrlr->ctrlr, nvme_ns->id);
    4938          51 :         if (!ns) {
    4939           0 :                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "Invalid NS %d\n", nvme_ns->id);
    4940           0 :                 rc = -EINVAL;
    4941           0 :                 goto done;
    4942             :         }
    4943             : 
    4944          51 :         nvme_ns->ns = ns;
    4945          51 :         nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    4946             : 
    4947          51 :         if (nvme_ctrlr->ana_log_page != NULL) {
    4948          37 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ns_set_ana_state, nvme_ns);
    4949          37 :         }
    4950             : 
    4951          51 :         bdev = nvme_bdev_ctrlr_get_bdev(nvme_ctrlr->nbdev_ctrlr, nvme_ns->id);
    4952          90 :         if (bdev == NULL) {
    4953          38 :                 rc = nvme_bdev_create(nvme_ctrlr, nvme_ns);
    4954          38 :         } else {
    4955          13 :                 rc = nvme_bdev_add_ns(bdev, nvme_ns);
    4956          13 :                 if (rc == 0) {
    4957          12 :                         return;
    4958             :                 }
    4959             :         }
    4960             : done:
    4961          39 :         nvme_ctrlr_populate_namespace_done(nvme_ns, rc);
    4962          51 : }
    4963             : 
    4964             : static void
    4965          49 : nvme_ctrlr_depopulate_namespace_done(struct nvme_ns *nvme_ns)
    4966             : {
    4967          49 :         struct nvme_ctrlr *nvme_ctrlr = nvme_ns->ctrlr;
    4968             : 
    4969          49 :         assert(nvme_ctrlr != NULL);
    4970             : 
    4971          49 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    4972             : 
    4973          49 :         RB_REMOVE(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    4974             : 
    4975          49 :         if (nvme_ns->bdev != NULL) {
    4976           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4977           0 :                 return;
    4978             :         }
    4979             : 
    4980          49 :         nvme_ns_free(nvme_ns);
    4981          49 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    4982             : 
    4983          49 :         nvme_ctrlr_release(nvme_ctrlr);
    4984          49 : }
    4985             : 
    4986             : static void
    4987          11 : bdev_nvme_delete_io_path_done(struct nvme_bdev *nbdev, void *ctx, int status)
    4988             : {
    4989          11 :         struct nvme_ns *nvme_ns = ctx;
    4990             : 
    4991          11 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    4992          11 : }
    4993             : 
    4994             : static void
    4995          49 : nvme_ctrlr_depopulate_namespace(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ns *nvme_ns)
    4996             : {
    4997             :         struct nvme_bdev *bdev;
    4998             : 
    4999          49 :         spdk_poller_unregister(&nvme_ns->anatt_timer);
    5000             : 
    5001          49 :         bdev = nvme_ns->bdev;
    5002          49 :         if (bdev != NULL) {
    5003          45 :                 pthread_mutex_lock(&bdev->mutex);
    5004             : 
    5005          45 :                 assert(bdev->ref > 0);
    5006          45 :                 bdev->ref--;
    5007          45 :                 if (bdev->ref == 0) {
    5008          34 :                         pthread_mutex_unlock(&bdev->mutex);
    5009             : 
    5010          34 :                         spdk_bdev_unregister(&bdev->disk, NULL, NULL);
    5011          34 :                 } else {
    5012             :                         /* spdk_bdev_unregister() is not called until the last nvme_ns is
    5013             :                          * depopulated. Hence we need to remove nvme_ns from bdev->nvme_ns_list
    5014             :                          * and clear nvme_ns->bdev here.
    5015             :                          */
    5016          11 :                         TAILQ_REMOVE(&bdev->nvme_ns_list, nvme_ns, tailq);
    5017          11 :                         nvme_ns->bdev = NULL;
    5018             : 
    5019          11 :                         pthread_mutex_unlock(&bdev->mutex);
    5020             : 
    5021             :                         /* Delete nvme_io_paths from nvme_bdev_channels dynamically. After that,
    5022             :                          * we call depopulate_namespace_done() to avoid use-after-free.
    5023             :                          */
    5024          22 :                         nvme_bdev_for_each_channel(bdev,
    5025             :                                                    bdev_nvme_delete_io_path,
    5026          11 :                                                    nvme_ns,
    5027             :                                                    bdev_nvme_delete_io_path_done);
    5028          11 :                         return;
    5029             :                 }
    5030          34 :         }
    5031             : 
    5032          38 :         nvme_ctrlr_depopulate_namespace_done(nvme_ns);
    5033          49 : }
    5034             : 
    5035             : static void
    5036          62 : nvme_ctrlr_populate_namespaces(struct nvme_ctrlr *nvme_ctrlr,
    5037             :                                struct nvme_async_probe_ctx *ctx)
    5038             : {
    5039          62 :         struct spdk_nvme_ctrlr  *ctrlr = nvme_ctrlr->ctrlr;
    5040             :         struct nvme_ns  *nvme_ns, *next;
    5041             :         struct spdk_nvme_ns     *ns;
    5042             :         struct nvme_bdev        *bdev;
    5043             :         uint32_t                nsid;
    5044             :         int                     rc;
    5045             :         uint64_t                num_sectors;
    5046             : 
    5047          62 :         if (ctx) {
    5048             :                 /* Initialize this count to 1 to handle the populate functions
    5049             :                  * calling nvme_ctrlr_populate_namespace_done() immediately.
    5050             :                  */
    5051          46 :                 ctx->populates_in_progress = 1;
    5052          46 :         }
    5053             : 
    5054             :         /* First loop over our existing namespaces and see if they have been
    5055             :          * removed. */
    5056          62 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5057          66 :         while (nvme_ns != NULL) {
    5058           4 :                 next = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    5059             : 
    5060           4 :                 if (spdk_nvme_ctrlr_is_active_ns(ctrlr, nvme_ns->id)) {
    5061             :                         /* NS is still there or added again. Its attributes may have changed. */
    5062           3 :                         ns = spdk_nvme_ctrlr_get_ns(ctrlr, nvme_ns->id);
    5063           3 :                         if (nvme_ns->ns != ns) {
    5064           1 :                                 assert(nvme_ns->ns == NULL);
    5065           1 :                                 nvme_ns->ns = ns;
    5066           1 :                                 NVME_CTRLR_DEBUGLOG(nvme_ctrlr, "NSID %u was added\n", nvme_ns->id);
    5067           1 :                         }
    5068             : 
    5069           3 :                         num_sectors = spdk_nvme_ns_get_num_sectors(ns);
    5070           3 :                         bdev = nvme_ns->bdev;
    5071           3 :                         assert(bdev != NULL);
    5072           3 :                         if (bdev->disk.blockcnt != num_sectors) {
    5073           1 :                                 NVME_CTRLR_NOTICELOG(nvme_ctrlr,
    5074             :                                                      "NSID %u is resized: bdev name %s, old size %" PRIu64 ", new size %" PRIu64 "\n",
    5075             :                                                      nvme_ns->id,
    5076             :                                                      bdev->disk.name,
    5077             :                                                      bdev->disk.blockcnt,
    5078             :                                                      num_sectors);
    5079           1 :                                 rc = spdk_bdev_notify_blockcnt_change(&bdev->disk, num_sectors);
    5080           1 :                                 if (rc != 0) {
    5081           0 :                                         NVME_CTRLR_ERRLOG(nvme_ctrlr,
    5082             :                                                           "Could not change num blocks for nvme bdev: name %s, errno: %d.\n",
    5083             :                                                           bdev->disk.name, rc);
    5084           0 :                                 }
    5085           1 :                         }
    5086           3 :                 } else {
    5087             :                         /* Namespace was removed */
    5088           1 :                         nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    5089             :                 }
    5090             : 
    5091           4 :                 nvme_ns = next;
    5092             :         }
    5093             : 
    5094             :         /* Loop through all of the namespaces at the nvme level and see if any of them are new */
    5095          62 :         nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    5096         116 :         while (nsid != 0) {
    5097          54 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    5098             : 
    5099          54 :                 if (nvme_ns == NULL) {
    5100             :                         /* Found a new one */
    5101          51 :                         nvme_ns = nvme_ns_alloc();
    5102          51 :                         if (nvme_ns == NULL) {
    5103           0 :                                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate namespace\n");
    5104             :                                 /* This just fails to attach the namespace. It may work on a future attempt. */
    5105           0 :                                 continue;
    5106             :                         }
    5107             : 
    5108          51 :                         nvme_ns->id = nsid;
    5109          51 :                         nvme_ns->ctrlr = nvme_ctrlr;
    5110             : 
    5111          51 :                         nvme_ns->bdev = NULL;
    5112             : 
    5113          51 :                         if (ctx) {
    5114          50 :                                 ctx->populates_in_progress++;
    5115          50 :                         }
    5116          51 :                         nvme_ns->probe_ctx = ctx;
    5117             : 
    5118          51 :                         RB_INSERT(nvme_ns_tree, &nvme_ctrlr->namespaces, nvme_ns);
    5119             : 
    5120          51 :                         nvme_ctrlr_populate_namespace(nvme_ctrlr, nvme_ns);
    5121          51 :                 }
    5122             : 
    5123          54 :                 nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid);
    5124             :         }
    5125             : 
    5126          62 :         if (ctx) {
    5127             :                 /* Decrement this count now that the loop is over to account
    5128             :                  * for the one we started with.  If the count is then 0, we
    5129             :                  * know any populate_namespace functions completed immediately,
    5130             :                  * so we'll kick the callback here.
    5131             :                  */
    5132          46 :                 ctx->populates_in_progress--;
    5133          46 :                 if (ctx->populates_in_progress == 0) {
    5134          34 :                         nvme_ctrlr_populate_namespaces_done(nvme_ctrlr, ctx);
    5135          34 :                 }
    5136          46 :         }
    5137             : 
    5138          62 : }
    5139             : 
    5140             : static void
    5141          61 : nvme_ctrlr_depopulate_namespaces(struct nvme_ctrlr *nvme_ctrlr)
    5142             : {
    5143             :         struct nvme_ns *nvme_ns, *tmp;
    5144             : 
    5145         109 :         RB_FOREACH_SAFE(nvme_ns, nvme_ns_tree, &nvme_ctrlr->namespaces, tmp) {
    5146          48 :                 nvme_ctrlr_depopulate_namespace(nvme_ctrlr, nvme_ns);
    5147          48 :         }
    5148          61 : }
    5149             : 
    5150             : static uint32_t
    5151          36 : nvme_ctrlr_get_ana_log_page_size(struct nvme_ctrlr *nvme_ctrlr)
    5152             : {
    5153          36 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5154             :         const struct spdk_nvme_ctrlr_data *cdata;
    5155          36 :         uint32_t nsid, ns_count = 0;
    5156             : 
    5157          36 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5158             : 
    5159          80 :         for (nsid = spdk_nvme_ctrlr_get_first_active_ns(ctrlr);
    5160          80 :              nsid != 0; nsid = spdk_nvme_ctrlr_get_next_active_ns(ctrlr, nsid)) {
    5161          44 :                 ns_count++;
    5162          44 :         }
    5163             : 
    5164          72 :         return sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    5165          36 :                sizeof(struct spdk_nvme_ana_group_descriptor) + ns_count *
    5166             :                sizeof(uint32_t);
    5167             : }
    5168             : 
    5169             : static int
    5170           7 : nvme_ctrlr_set_ana_states(const struct spdk_nvme_ana_group_descriptor *desc,
    5171             :                           void *cb_arg)
    5172             : {
    5173           7 :         struct nvme_ctrlr *nvme_ctrlr = cb_arg;
    5174             :         struct nvme_ns *nvme_ns;
    5175             :         uint32_t i, nsid;
    5176             : 
    5177          13 :         for (i = 0; i < desc->num_of_nsid; i++) {
    5178           6 :                 nsid = desc->nsid[i];
    5179           6 :                 if (nsid == 0) {
    5180           0 :                         continue;
    5181             :                 }
    5182             : 
    5183           6 :                 nvme_ns = nvme_ctrlr_get_ns(nvme_ctrlr, nsid);
    5184             : 
    5185           6 :                 if (nvme_ns == NULL) {
    5186             :                         /* Target told us that an inactive namespace had an ANA change */
    5187           1 :                         continue;
    5188             :                 }
    5189             : 
    5190           5 :                 _nvme_ns_set_ana_state(nvme_ns, desc);
    5191           5 :         }
    5192             : 
    5193           7 :         return 0;
    5194             : }
    5195             : 
    5196             : static void
    5197           0 : bdev_nvme_disable_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    5198             : {
    5199             :         struct nvme_ns *nvme_ns;
    5200             : 
    5201           0 :         spdk_free(nvme_ctrlr->ana_log_page);
    5202           0 :         nvme_ctrlr->ana_log_page = NULL;
    5203             : 
    5204           0 :         for (nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    5205           0 :              nvme_ns != NULL;
    5206           0 :              nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns)) {
    5207           0 :                 nvme_ns->ana_state_updating = false;
    5208           0 :                 nvme_ns->ana_state = SPDK_NVME_ANA_OPTIMIZED_STATE;
    5209           0 :         }
    5210           0 : }
    5211             : 
    5212             : static void
    5213           3 : nvme_ctrlr_read_ana_log_page_done(void *ctx, const struct spdk_nvme_cpl *cpl)
    5214             : {
    5215           3 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    5216             : 
    5217           3 :         if (cpl != NULL && spdk_nvme_cpl_is_success(cpl)) {
    5218           6 :                 bdev_nvme_parse_ana_log_page(nvme_ctrlr, nvme_ctrlr_set_ana_states,
    5219           3 :                                              nvme_ctrlr);
    5220           3 :         } else {
    5221           0 :                 bdev_nvme_disable_read_ana_log_page(nvme_ctrlr);
    5222             :         }
    5223             : 
    5224           3 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5225             : 
    5226           3 :         assert(nvme_ctrlr->ana_log_page_updating == true);
    5227           3 :         nvme_ctrlr->ana_log_page_updating = false;
    5228             : 
    5229           3 :         if (nvme_ctrlr_can_be_unregistered(nvme_ctrlr)) {
    5230           0 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5231             : 
    5232           0 :                 nvme_ctrlr_unregister(nvme_ctrlr);
    5233           0 :         } else {
    5234           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5235             : 
    5236           3 :                 bdev_nvme_clear_io_path_caches(nvme_ctrlr);
    5237             :         }
    5238           3 : }
    5239             : 
    5240             : static int
    5241           6 : nvme_ctrlr_read_ana_log_page(struct nvme_ctrlr *nvme_ctrlr)
    5242             : {
    5243             :         uint32_t ana_log_page_size;
    5244             :         int rc;
    5245             : 
    5246           6 :         if (nvme_ctrlr->ana_log_page == NULL) {
    5247           0 :                 return -EINVAL;
    5248             :         }
    5249             : 
    5250           6 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    5251             : 
    5252           6 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    5253           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr,
    5254             :                                   "ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    5255             :                                   ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    5256           0 :                 return -EINVAL;
    5257             :         }
    5258             : 
    5259           6 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    5260           6 :         if (!nvme_ctrlr_is_available(nvme_ctrlr) ||
    5261           5 :             nvme_ctrlr->ana_log_page_updating) {
    5262           3 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5263           3 :                 return -EBUSY;
    5264             :         }
    5265             : 
    5266           3 :         nvme_ctrlr->ana_log_page_updating = true;
    5267           3 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    5268             : 
    5269           6 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(nvme_ctrlr->ctrlr,
    5270             :                                               SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    5271             :                                               SPDK_NVME_GLOBAL_NS_TAG,
    5272           3 :                                               nvme_ctrlr->ana_log_page,
    5273           3 :                                               ana_log_page_size, 0,
    5274             :                                               nvme_ctrlr_read_ana_log_page_done,
    5275           3 :                                               nvme_ctrlr);
    5276           3 :         if (rc != 0) {
    5277           0 :                 nvme_ctrlr_read_ana_log_page_done(nvme_ctrlr, NULL);
    5278           0 :         }
    5279             : 
    5280           3 :         return rc;
    5281           6 : }
    5282             : 
    5283             : static void
    5284           0 : dummy_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
    5285             : {
    5286           0 : }
    5287             : 
    5288             : struct bdev_nvme_set_preferred_path_ctx {
    5289             :         struct spdk_bdev_desc *desc;
    5290             :         struct nvme_ns *nvme_ns;
    5291             :         bdev_nvme_set_preferred_path_cb cb_fn;
    5292             :         void *cb_arg;
    5293             : };
    5294             : 
    5295             : static void
    5296           3 : bdev_nvme_set_preferred_path_done(struct nvme_bdev *nbdev, void *_ctx, int status)
    5297             : {
    5298           3 :         struct bdev_nvme_set_preferred_path_ctx *ctx = _ctx;
    5299             : 
    5300           3 :         assert(ctx != NULL);
    5301           3 :         assert(ctx->desc != NULL);
    5302           3 :         assert(ctx->cb_fn != NULL);
    5303             : 
    5304           3 :         spdk_bdev_close(ctx->desc);
    5305             : 
    5306           3 :         ctx->cb_fn(ctx->cb_arg, status);
    5307             : 
    5308           3 :         free(ctx);
    5309           3 : }
    5310             : 
    5311             : static void
    5312           2 : _bdev_nvme_set_preferred_path(struct nvme_bdev_channel_iter *i,
    5313             :                               struct nvme_bdev *nbdev,
    5314             :                               struct nvme_bdev_channel *nbdev_ch, void *_ctx)
    5315             : {
    5316           2 :         struct bdev_nvme_set_preferred_path_ctx *ctx = _ctx;
    5317             :         struct nvme_io_path *io_path, *prev;
    5318             : 
    5319           2 :         prev = NULL;
    5320           3 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    5321           3 :                 if (io_path->nvme_ns == ctx->nvme_ns) {
    5322           2 :                         break;
    5323             :                 }
    5324           1 :                 prev = io_path;
    5325           1 :         }
    5326             : 
    5327           2 :         if (io_path != NULL) {
    5328           2 :                 if (prev != NULL) {
    5329           1 :                         STAILQ_REMOVE_AFTER(&nbdev_ch->io_path_list, prev, stailq);
    5330           1 :                         STAILQ_INSERT_HEAD(&nbdev_ch->io_path_list, io_path, stailq);
    5331           1 :                 }
    5332             : 
    5333             :                 /* We can set io_path to nbdev_ch->current_io_path directly here.
    5334             :                  * However, it needs to be conditional. To simplify the code,
    5335             :                  * just clear nbdev_ch->current_io_path and let find_io_path()
    5336             :                  * fill it.
    5337             :                  *
    5338             :                  * Automatic failback may be disabled. Hence even if the io_path is
    5339             :                  * already at the head, clear nbdev_ch->current_io_path.
    5340             :                  */
    5341           2 :                 bdev_nvme_clear_current_io_path(nbdev_ch);
    5342           2 :         }
    5343             : 
    5344           2 :         nvme_bdev_for_each_channel_continue(i, 0);
    5345           2 : }
    5346             : 
    5347             : static struct nvme_ns *
    5348           3 : bdev_nvme_set_preferred_ns(struct nvme_bdev *nbdev, uint16_t cntlid)
    5349             : {
    5350             :         struct nvme_ns *nvme_ns, *prev;
    5351             :         const struct spdk_nvme_ctrlr_data *cdata;
    5352             : 
    5353           3 :         prev = NULL;
    5354           6 :         TAILQ_FOREACH(nvme_ns, &nbdev->nvme_ns_list, tailq) {
    5355           6 :                 cdata = spdk_nvme_ctrlr_get_data(nvme_ns->ctrlr->ctrlr);
    5356             : 
    5357           6 :                 if (cdata->cntlid == cntlid) {
    5358           3 :                         break;
    5359             :                 }
    5360           3 :                 prev = nvme_ns;
    5361           3 :         }
    5362             : 
    5363           3 :         if (nvme_ns != NULL && prev != NULL) {
    5364           2 :                 TAILQ_REMOVE(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5365           2 :                 TAILQ_INSERT_HEAD(&nbdev->nvme_ns_list, nvme_ns, tailq);
    5366           2 :         }
    5367             : 
    5368           3 :         return nvme_ns;
    5369             : }
    5370             : 
    5371             : /* This function supports only multipath mode. There is only a single I/O path
    5372             :  * for each NVMe-oF controller. Hence, just move the matched I/O path to the
    5373             :  * head of the I/O path list for each NVMe bdev channel.
    5374             :  *
    5375             :  * NVMe bdev channel may be acquired after completing this function. move the
    5376             :  * matched namespace to the head of the namespace list for the NVMe bdev too.
    5377             :  */
    5378             : void
    5379           3 : bdev_nvme_set_preferred_path(const char *name, uint16_t cntlid,
    5380             :                              bdev_nvme_set_preferred_path_cb cb_fn, void *cb_arg)
    5381             : {
    5382             :         struct bdev_nvme_set_preferred_path_ctx *ctx;
    5383             :         struct spdk_bdev *bdev;
    5384             :         struct nvme_bdev *nbdev;
    5385           3 :         int rc = 0;
    5386             : 
    5387           3 :         assert(cb_fn != NULL);
    5388             : 
    5389           3 :         ctx = calloc(1, sizeof(*ctx));
    5390           3 :         if (ctx == NULL) {
    5391           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5392           0 :                 rc = -ENOMEM;
    5393           0 :                 goto err_alloc;
    5394             :         }
    5395             : 
    5396           3 :         ctx->cb_fn = cb_fn;
    5397           3 :         ctx->cb_arg = cb_arg;
    5398             : 
    5399           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5400           3 :         if (rc != 0) {
    5401           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5402           0 :                 goto err_open;
    5403             :         }
    5404             : 
    5405           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5406             : 
    5407           3 :         if (bdev->module != &nvme_if) {
    5408           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5409           0 :                 rc = -ENODEV;
    5410           0 :                 goto err_bdev;
    5411             :         }
    5412             : 
    5413           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5414             : 
    5415           3 :         pthread_mutex_lock(&nbdev->mutex);
    5416             : 
    5417           3 :         ctx->nvme_ns = bdev_nvme_set_preferred_ns(nbdev, cntlid);
    5418           3 :         if (ctx->nvme_ns == NULL) {
    5419           0 :                 pthread_mutex_unlock(&nbdev->mutex);
    5420             : 
    5421           0 :                 SPDK_ERRLOG("bdev %s does not have namespace to controller %u.\n", name, cntlid);
    5422           0 :                 rc = -ENODEV;
    5423           0 :                 goto err_bdev;
    5424             :         }
    5425             : 
    5426           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5427             : 
    5428           6 :         nvme_bdev_for_each_channel(nbdev,
    5429             :                                    _bdev_nvme_set_preferred_path,
    5430           3 :                                    ctx,
    5431             :                                    bdev_nvme_set_preferred_path_done);
    5432           3 :         return;
    5433             : 
    5434             : err_bdev:
    5435           0 :         spdk_bdev_close(ctx->desc);
    5436             : err_open:
    5437           0 :         free(ctx);
    5438             : err_alloc:
    5439           0 :         cb_fn(cb_arg, rc);
    5440           3 : }
    5441             : 
    5442             : struct bdev_nvme_set_multipath_policy_ctx {
    5443             :         struct spdk_bdev_desc *desc;
    5444             :         spdk_bdev_nvme_set_multipath_policy_cb cb_fn;
    5445             :         void *cb_arg;
    5446             : };
    5447             : 
    5448             : static void
    5449           3 : bdev_nvme_set_multipath_policy_done(struct nvme_bdev *nbdev, void *_ctx, int status)
    5450             : {
    5451           3 :         struct bdev_nvme_set_multipath_policy_ctx *ctx = _ctx;
    5452             : 
    5453           3 :         assert(ctx != NULL);
    5454           3 :         assert(ctx->desc != NULL);
    5455           3 :         assert(ctx->cb_fn != NULL);
    5456             : 
    5457           3 :         spdk_bdev_close(ctx->desc);
    5458             : 
    5459           3 :         ctx->cb_fn(ctx->cb_arg, status);
    5460             : 
    5461           3 :         free(ctx);
    5462           3 : }
    5463             : 
    5464             : static void
    5465           1 : _bdev_nvme_set_multipath_policy(struct nvme_bdev_channel_iter *i,
    5466             :                                 struct nvme_bdev *nbdev,
    5467             :                                 struct nvme_bdev_channel *nbdev_ch, void *ctx)
    5468             : {
    5469           1 :         nbdev_ch->mp_policy = nbdev->mp_policy;
    5470           1 :         nbdev_ch->mp_selector = nbdev->mp_selector;
    5471           1 :         nbdev_ch->rr_min_io = nbdev->rr_min_io;
    5472           1 :         bdev_nvme_clear_current_io_path(nbdev_ch);
    5473             : 
    5474           1 :         nvme_bdev_for_each_channel_continue(i, 0);
    5475           1 : }
    5476             : 
    5477             : void
    5478           3 : spdk_bdev_nvme_set_multipath_policy(const char *name, enum spdk_bdev_nvme_multipath_policy policy,
    5479             :                                     enum spdk_bdev_nvme_multipath_selector selector, uint32_t rr_min_io,
    5480             :                                     spdk_bdev_nvme_set_multipath_policy_cb cb_fn, void *cb_arg)
    5481             : {
    5482             :         struct bdev_nvme_set_multipath_policy_ctx *ctx;
    5483             :         struct spdk_bdev *bdev;
    5484             :         struct nvme_bdev *nbdev;
    5485             :         int rc;
    5486             : 
    5487           3 :         assert(cb_fn != NULL);
    5488             : 
    5489           3 :         switch (policy) {
    5490             :         case BDEV_NVME_MP_POLICY_ACTIVE_PASSIVE:
    5491           1 :                 break;
    5492             :         case BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE:
    5493           2 :                 switch (selector) {
    5494             :                 case BDEV_NVME_MP_SELECTOR_ROUND_ROBIN:
    5495           1 :                         if (rr_min_io == UINT32_MAX) {
    5496           0 :                                 rr_min_io = 1;
    5497           1 :                         } else if (rr_min_io == 0) {
    5498           0 :                                 rc = -EINVAL;
    5499           0 :                                 goto exit;
    5500             :                         }
    5501           1 :                         break;
    5502             :                 case BDEV_NVME_MP_SELECTOR_QUEUE_DEPTH:
    5503           1 :                         break;
    5504             :                 default:
    5505           0 :                         rc = -EINVAL;
    5506           0 :                         goto exit;
    5507             :                 }
    5508           2 :                 break;
    5509             :         default:
    5510           0 :                 rc = -EINVAL;
    5511           0 :                 goto exit;
    5512             :         }
    5513             : 
    5514           3 :         ctx = calloc(1, sizeof(*ctx));
    5515           3 :         if (ctx == NULL) {
    5516           0 :                 SPDK_ERRLOG("Failed to alloc context.\n");
    5517           0 :                 rc = -ENOMEM;
    5518           0 :                 goto exit;
    5519             :         }
    5520             : 
    5521           3 :         ctx->cb_fn = cb_fn;
    5522           3 :         ctx->cb_arg = cb_arg;
    5523             : 
    5524           3 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &ctx->desc);
    5525           3 :         if (rc != 0) {
    5526           0 :                 SPDK_ERRLOG("Failed to open bdev %s.\n", name);
    5527           0 :                 rc = -ENODEV;
    5528           0 :                 goto err_open;
    5529             :         }
    5530             : 
    5531           3 :         bdev = spdk_bdev_desc_get_bdev(ctx->desc);
    5532           3 :         if (bdev->module != &nvme_if) {
    5533           0 :                 SPDK_ERRLOG("bdev %s is not registered in this module.\n", name);
    5534           0 :                 rc = -ENODEV;
    5535           0 :                 goto err_module;
    5536             :         }
    5537           3 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    5538             : 
    5539           3 :         pthread_mutex_lock(&nbdev->mutex);
    5540           3 :         nbdev->mp_policy = policy;
    5541           3 :         nbdev->mp_selector = selector;
    5542           3 :         nbdev->rr_min_io = rr_min_io;
    5543           3 :         pthread_mutex_unlock(&nbdev->mutex);
    5544             : 
    5545           6 :         nvme_bdev_for_each_channel(nbdev,
    5546             :                                    _bdev_nvme_set_multipath_policy,
    5547           3 :                                    ctx,
    5548             :                                    bdev_nvme_set_multipath_policy_done);
    5549           3 :         return;
    5550             : 
    5551             : err_module:
    5552           0 :         spdk_bdev_close(ctx->desc);
    5553             : err_open:
    5554           0 :         free(ctx);
    5555             : exit:
    5556           0 :         cb_fn(cb_arg, rc);
    5557           3 : }
    5558             : 
    5559             : static void
    5560           3 : aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    5561             : {
    5562           3 :         struct nvme_ctrlr *nvme_ctrlr           = arg;
    5563             :         union spdk_nvme_async_event_completion  event;
    5564             : 
    5565           3 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5566           0 :                 SPDK_WARNLOG("AER request execute failed\n");
    5567           0 :                 return;
    5568             :         }
    5569             : 
    5570           3 :         event.raw = cpl->cdw0;
    5571           3 :         if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5572           3 :             (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_NS_ATTR_CHANGED)) {
    5573           2 :                 nvme_ctrlr_populate_namespaces(nvme_ctrlr, NULL);
    5574           3 :         } else if ((event.bits.async_event_type == SPDK_NVME_ASYNC_EVENT_TYPE_NOTICE) &&
    5575           1 :                    (event.bits.async_event_info == SPDK_NVME_ASYNC_EVENT_ANA_CHANGE)) {
    5576           1 :                 nvme_ctrlr_read_ana_log_page(nvme_ctrlr);
    5577           1 :         }
    5578           3 : }
    5579             : 
    5580             : static void
    5581          52 : free_nvme_async_probe_ctx(struct nvme_async_probe_ctx *ctx)
    5582             : {
    5583          52 :         spdk_keyring_put_key(ctx->drv_opts.tls_psk);
    5584          52 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_key);
    5585          52 :         spdk_keyring_put_key(ctx->drv_opts.dhchap_ctrlr_key);
    5586          52 :         free(ctx);
    5587          52 : }
    5588             : 
    5589             : static void
    5590          52 : populate_namespaces_cb(struct nvme_async_probe_ctx *ctx, int rc)
    5591             : {
    5592          52 :         if (ctx->cb_fn) {
    5593          52 :                 ctx->cb_fn(ctx->cb_ctx, ctx->reported_bdevs, rc);
    5594          52 :         }
    5595             : 
    5596          52 :         ctx->namespaces_populated = true;
    5597          52 :         if (ctx->probe_done) {
    5598             :                 /* The probe was already completed, so we need to free the context
    5599             :                  * here.  This can happen for cases like OCSSD, where we need to
    5600             :                  * send additional commands to the SSD after attach.
    5601             :                  */
    5602          31 :                 free_nvme_async_probe_ctx(ctx);
    5603          31 :         }
    5604          52 : }
    5605             : 
    5606             : static int
    5607          20 : bdev_nvme_remove_poller(void *ctx)
    5608             : {
    5609             :         struct spdk_nvme_transport_id trid_pcie;
    5610             : 
    5611          20 :         if (TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    5612           1 :                 spdk_poller_unregister(&g_hotplug_poller);
    5613           1 :                 return SPDK_POLLER_IDLE;
    5614             :         }
    5615             : 
    5616          19 :         memset(&trid_pcie, 0, sizeof(trid_pcie));
    5617          19 :         spdk_nvme_trid_populate_transport(&trid_pcie, SPDK_NVME_TRANSPORT_PCIE);
    5618             : 
    5619          19 :         if (spdk_nvme_scan_attached(&trid_pcie)) {
    5620           0 :                 SPDK_ERRLOG_RATELIMIT("spdk_nvme_scan_attached() failed\n");
    5621           0 :         }
    5622             : 
    5623          19 :         return SPDK_POLLER_BUSY;
    5624          20 : }
    5625             : 
    5626             : static void
    5627          60 : nvme_ctrlr_create_done(struct nvme_ctrlr *nvme_ctrlr,
    5628             :                        struct nvme_async_probe_ctx *ctx)
    5629             : {
    5630          60 :         struct spdk_nvme_transport_id *trid = &nvme_ctrlr->active_path_id->trid;
    5631             : 
    5632          60 :         if (spdk_nvme_trtype_is_fabrics(trid->trtype)) {
    5633          60 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was created to %s:%s\n",
    5634             :                                    trid->traddr, trid->trsvcid);
    5635          60 :         } else {
    5636           0 :                 NVME_CTRLR_INFOLOG(nvme_ctrlr, "ctrlr was created\n");
    5637             :         }
    5638             : 
    5639         120 :         spdk_io_device_register(nvme_ctrlr,
    5640             :                                 bdev_nvme_create_ctrlr_channel_cb,
    5641             :                                 bdev_nvme_destroy_ctrlr_channel_cb,
    5642             :                                 sizeof(struct nvme_ctrlr_channel),
    5643          60 :                                 nvme_ctrlr->nbdev_ctrlr->name);
    5644             : 
    5645          60 :         nvme_ctrlr_populate_namespaces(nvme_ctrlr, ctx);
    5646             : 
    5647          60 :         if (g_hotplug_poller == NULL) {
    5648           2 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_remove_poller, NULL,
    5649             :                                                         NVME_HOTPLUG_POLL_PERIOD_DEFAULT);
    5650           2 :         }
    5651          60 : }
    5652             : 
    5653             : static void
    5654          30 : nvme_ctrlr_init_ana_log_page_done(void *_ctx, const struct spdk_nvme_cpl *cpl)
    5655             : {
    5656          30 :         struct nvme_ctrlr *nvme_ctrlr = _ctx;
    5657          30 :         struct nvme_async_probe_ctx *ctx = nvme_ctrlr->probe_ctx;
    5658             : 
    5659          30 :         nvme_ctrlr->probe_ctx = NULL;
    5660             : 
    5661          30 :         if (spdk_nvme_cpl_is_error(cpl)) {
    5662           0 :                 nvme_ctrlr_delete(nvme_ctrlr);
    5663             : 
    5664           0 :                 if (ctx != NULL) {
    5665           0 :                         ctx->reported_bdevs = 0;
    5666           0 :                         populate_namespaces_cb(ctx, -1);
    5667           0 :                 }
    5668           0 :                 return;
    5669             :         }
    5670             : 
    5671          30 :         nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5672          30 : }
    5673             : 
    5674             : static int
    5675          30 : nvme_ctrlr_init_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
    5676             :                              struct nvme_async_probe_ctx *ctx)
    5677             : {
    5678          30 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5679             :         const struct spdk_nvme_ctrlr_data *cdata;
    5680             :         uint32_t ana_log_page_size;
    5681             : 
    5682          30 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5683             : 
    5684             :         /* Set buffer size enough to include maximum number of allowed namespaces. */
    5685          60 :         ana_log_page_size = sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
    5686          30 :                             sizeof(struct spdk_nvme_ana_group_descriptor) + cdata->mnan *
    5687             :                             sizeof(uint32_t);
    5688             : 
    5689          30 :         nvme_ctrlr->ana_log_page = spdk_zmalloc(ana_log_page_size, 64, NULL,
    5690             :                                                 SPDK_ENV_NUMA_ID_ANY, SPDK_MALLOC_DMA);
    5691          30 :         if (nvme_ctrlr->ana_log_page == NULL) {
    5692           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "could not allocate ANA log page buffer\n");
    5693           0 :                 return -ENXIO;
    5694             :         }
    5695             : 
    5696             :         /* Each descriptor in a ANA log page is not ensured to be 8-bytes aligned.
    5697             :          * Hence copy each descriptor to a temporary area when parsing it.
    5698             :          *
    5699             :          * Allocate a buffer whose size is as large as ANA log page buffer because
    5700             :          * we do not know the size of a descriptor until actually reading it.
    5701             :          */
    5702          30 :         nvme_ctrlr->copied_ana_desc = calloc(1, ana_log_page_size);
    5703          30 :         if (nvme_ctrlr->copied_ana_desc == NULL) {
    5704           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "could not allocate a buffer to parse ANA descriptor\n");
    5705           0 :                 return -ENOMEM;
    5706             :         }
    5707             : 
    5708          30 :         nvme_ctrlr->max_ana_log_page_size = ana_log_page_size;
    5709             : 
    5710          30 :         nvme_ctrlr->probe_ctx = ctx;
    5711             : 
    5712             :         /* Then, set the read size only to include the current active namespaces. */
    5713          30 :         ana_log_page_size = nvme_ctrlr_get_ana_log_page_size(nvme_ctrlr);
    5714             : 
    5715          30 :         if (ana_log_page_size > nvme_ctrlr->max_ana_log_page_size) {
    5716           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "ANA log page size %" PRIu32 " is larger than allowed %" PRIu32 "\n",
    5717             :                                   ana_log_page_size, nvme_ctrlr->max_ana_log_page_size);
    5718           0 :                 return -EINVAL;
    5719             :         }
    5720             : 
    5721          60 :         return spdk_nvme_ctrlr_cmd_get_log_page(ctrlr,
    5722             :                                                 SPDK_NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS,
    5723             :                                                 SPDK_NVME_GLOBAL_NS_TAG,
    5724          30 :                                                 nvme_ctrlr->ana_log_page,
    5725          30 :                                                 ana_log_page_size, 0,
    5726             :                                                 nvme_ctrlr_init_ana_log_page_done,
    5727          30 :                                                 nvme_ctrlr);
    5728          30 : }
    5729             : 
    5730             : /* hostnqn and subnqn were already verified before attaching a controller.
    5731             :  * Hence check only the multipath capability and cntlid here.
    5732             :  */
    5733             : static bool
    5734          16 : bdev_nvme_check_multipath(struct nvme_bdev_ctrlr *nbdev_ctrlr, struct spdk_nvme_ctrlr *ctrlr)
    5735             : {
    5736             :         struct nvme_ctrlr *tmp;
    5737             :         const struct spdk_nvme_ctrlr_data *cdata, *tmp_cdata;
    5738             : 
    5739          16 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5740             : 
    5741          16 :         if (!cdata->cmic.multi_ctrlr) {
    5742           0 :                 SPDK_ERRLOG("Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5743           0 :                 return false;
    5744             :         }
    5745             : 
    5746          33 :         TAILQ_FOREACH(tmp, &nbdev_ctrlr->ctrlrs, tailq) {
    5747          18 :                 tmp_cdata = spdk_nvme_ctrlr_get_data(tmp->ctrlr);
    5748             : 
    5749          18 :                 if (!tmp_cdata->cmic.multi_ctrlr) {
    5750           0 :                         NVME_CTRLR_ERRLOG(tmp, "Ctrlr%u does not support multipath.\n", cdata->cntlid);
    5751           0 :                         return false;
    5752             :                 }
    5753          18 :                 if (cdata->cntlid == tmp_cdata->cntlid) {
    5754           1 :                         NVME_CTRLR_ERRLOG(tmp, "cntlid %u are duplicated.\n", tmp_cdata->cntlid);
    5755           1 :                         return false;
    5756             :                 }
    5757          17 :         }
    5758             : 
    5759          15 :         return true;
    5760          16 : }
    5761             : 
    5762             : 
    5763             : static int
    5764          61 : nvme_bdev_ctrlr_create(const char *name, struct nvme_ctrlr *nvme_ctrlr)
    5765             : {
    5766             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    5767          61 :         struct spdk_nvme_ctrlr *ctrlr = nvme_ctrlr->ctrlr;
    5768             :         struct nvme_ctrlr      *nctrlr;
    5769          61 :         int rc = 0;
    5770             : 
    5771          61 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    5772             : 
    5773          61 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    5774          61 :         if (nbdev_ctrlr != NULL) {
    5775          16 :                 if (!bdev_nvme_check_multipath(nbdev_ctrlr, ctrlr)) {
    5776           1 :                         rc = -EINVAL;
    5777           1 :                         goto exit;
    5778             :                 }
    5779          32 :                 TAILQ_FOREACH(nctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    5780          17 :                         if (nctrlr->opts.multipath != nvme_ctrlr->opts.multipath) {
    5781             :                                 /* All controllers with the same name must be configured the same
    5782             :                                  * way, either for multipath or failover. If the configuration doesn't
    5783             :                                  * match - report error.
    5784             :                                  */
    5785           0 :                                 rc = -EINVAL;
    5786           0 :                                 goto exit;
    5787             :                         }
    5788          17 :                 }
    5789          15 :         } else {
    5790          45 :                 nbdev_ctrlr = calloc(1, sizeof(*nbdev_ctrlr));
    5791          45 :                 if (nbdev_ctrlr == NULL) {
    5792           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate nvme_bdev_ctrlr.\n");
    5793           0 :                         rc = -ENOMEM;
    5794           0 :                         goto exit;
    5795             :                 }
    5796          45 :                 nbdev_ctrlr->name = strdup(name);
    5797          45 :                 if (nbdev_ctrlr->name == NULL) {
    5798           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr, "Failed to allocate name of nvme_bdev_ctrlr.\n");
    5799           0 :                         free(nbdev_ctrlr);
    5800           0 :                         goto exit;
    5801             :                 }
    5802          45 :                 TAILQ_INIT(&nbdev_ctrlr->ctrlrs);
    5803          45 :                 TAILQ_INIT(&nbdev_ctrlr->bdevs);
    5804          45 :                 TAILQ_INSERT_TAIL(&g_nvme_bdev_ctrlrs, nbdev_ctrlr, tailq);
    5805             :         }
    5806          60 :         nvme_ctrlr->nbdev_ctrlr = nbdev_ctrlr;
    5807          60 :         TAILQ_INSERT_TAIL(&nbdev_ctrlr->ctrlrs, nvme_ctrlr, tailq);
    5808             : exit:
    5809          61 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    5810          61 :         return rc;
    5811             : }
    5812             : 
    5813             : static int
    5814          61 : nvme_ctrlr_create(struct spdk_nvme_ctrlr *ctrlr,
    5815             :                   const char *name,
    5816             :                   const struct spdk_nvme_transport_id *trid,
    5817             :                   struct nvme_async_probe_ctx *ctx)
    5818             : {
    5819             :         struct nvme_ctrlr *nvme_ctrlr;
    5820             :         struct nvme_path_id *path_id;
    5821             :         const struct spdk_nvme_ctrlr_data *cdata;
    5822          61 :         struct spdk_event_handler_opts opts = {
    5823             :                 .opts_size = SPDK_SIZEOF(&opts, fd_type),
    5824             :         };
    5825             :         uint64_t period;
    5826             :         int fd, rc;
    5827             : 
    5828          61 :         nvme_ctrlr = calloc(1, sizeof(*nvme_ctrlr));
    5829          61 :         if (nvme_ctrlr == NULL) {
    5830           0 :                 SPDK_ERRLOG("Failed to allocate device struct\n");
    5831           0 :                 return -ENOMEM;
    5832             :         }
    5833             : 
    5834          61 :         rc = pthread_mutex_init(&nvme_ctrlr->mutex, NULL);
    5835          61 :         if (rc != 0) {
    5836           0 :                 free(nvme_ctrlr);
    5837           0 :                 return rc;
    5838             :         }
    5839             : 
    5840          61 :         TAILQ_INIT(&nvme_ctrlr->trids);
    5841          61 :         RB_INIT(&nvme_ctrlr->namespaces);
    5842             : 
    5843             :         /* Get another reference to the key, so the first one can be released from probe_ctx */
    5844          61 :         if (ctx != NULL) {
    5845          47 :                 if (ctx->drv_opts.tls_psk != NULL) {
    5846           0 :                         nvme_ctrlr->psk = spdk_keyring_get_key(
    5847           0 :                                                   spdk_key_get_name(ctx->drv_opts.tls_psk));
    5848           0 :                         if (nvme_ctrlr->psk == NULL) {
    5849             :                                 /* Could only happen if the key was removed in the meantime */
    5850           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5851             :                                             spdk_key_get_name(ctx->drv_opts.tls_psk));
    5852           0 :                                 rc = -ENOKEY;
    5853           0 :                                 goto err;
    5854             :                         }
    5855           0 :                 }
    5856             : 
    5857          47 :                 if (ctx->drv_opts.dhchap_key != NULL) {
    5858           0 :                         nvme_ctrlr->dhchap_key = spdk_keyring_get_key(
    5859           0 :                                                          spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5860           0 :                         if (nvme_ctrlr->dhchap_key == NULL) {
    5861           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5862             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_key));
    5863           0 :                                 rc = -ENOKEY;
    5864           0 :                                 goto err;
    5865             :                         }
    5866           0 :                 }
    5867             : 
    5868          47 :                 if (ctx->drv_opts.dhchap_ctrlr_key != NULL) {
    5869           0 :                         nvme_ctrlr->dhchap_ctrlr_key =
    5870           0 :                                 spdk_keyring_get_key(
    5871           0 :                                         spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5872           0 :                         if (nvme_ctrlr->dhchap_ctrlr_key == NULL) {
    5873           0 :                                 SPDK_ERRLOG("Couldn't get a reference to the key '%s'\n",
    5874             :                                             spdk_key_get_name(ctx->drv_opts.dhchap_ctrlr_key));
    5875           0 :                                 rc = -ENOKEY;
    5876           0 :                                 goto err;
    5877             :                         }
    5878           0 :                 }
    5879          47 :         }
    5880             : 
    5881             :         /* Check if we manage to enable interrupts on the controller. */
    5882          61 :         if (spdk_interrupt_mode_is_enabled() && ctx != NULL && !ctx->drv_opts.enable_interrupts) {
    5883           0 :                 SPDK_ERRLOG("Failed to enable interrupts on the controller\n");
    5884           0 :                 rc = -ENOTSUP;
    5885           0 :                 goto err;
    5886             :         }
    5887             : 
    5888          61 :         path_id = calloc(1, sizeof(*path_id));
    5889          61 :         if (path_id == NULL) {
    5890           0 :                 SPDK_ERRLOG("Failed to allocate trid entry pointer\n");
    5891           0 :                 rc = -ENOMEM;
    5892           0 :                 goto err;
    5893             :         }
    5894             : 
    5895          61 :         path_id->trid = *trid;
    5896          61 :         if (ctx != NULL) {
    5897          47 :                 memcpy(path_id->hostid.hostaddr, ctx->drv_opts.src_addr, sizeof(path_id->hostid.hostaddr));
    5898          47 :                 memcpy(path_id->hostid.hostsvcid, ctx->drv_opts.src_svcid, sizeof(path_id->hostid.hostsvcid));
    5899          47 :         }
    5900          61 :         nvme_ctrlr->active_path_id = path_id;
    5901          61 :         TAILQ_INSERT_HEAD(&nvme_ctrlr->trids, path_id, link);
    5902             : 
    5903          61 :         nvme_ctrlr->thread = spdk_get_thread();
    5904          61 :         nvme_ctrlr->ctrlr = ctrlr;
    5905          61 :         nvme_ctrlr->ref = 1;
    5906             : 
    5907          61 :         if (spdk_nvme_ctrlr_is_ocssd_supported(ctrlr)) {
    5908           0 :                 SPDK_ERRLOG("OCSSDs are not supported");
    5909           0 :                 rc = -ENOTSUP;
    5910           0 :                 goto err;
    5911             :         }
    5912             : 
    5913          61 :         if (ctx != NULL) {
    5914          47 :                 memcpy(&nvme_ctrlr->opts, &ctx->bdev_opts, sizeof(ctx->bdev_opts));
    5915          47 :         } else {
    5916          14 :                 spdk_bdev_nvme_get_default_ctrlr_opts(&nvme_ctrlr->opts);
    5917             :         }
    5918             : 
    5919          61 :         period = spdk_interrupt_mode_is_enabled() ? 0 : g_opts.nvme_adminq_poll_period_us;
    5920             : 
    5921          61 :         nvme_ctrlr->adminq_timer_poller = SPDK_POLLER_REGISTER(bdev_nvme_poll_adminq, nvme_ctrlr,
    5922             :                                           period);
    5923             : 
    5924          61 :         if (spdk_interrupt_mode_is_enabled()) {
    5925           0 :                 spdk_poller_register_interrupt(nvme_ctrlr->adminq_timer_poller, NULL, NULL);
    5926             : 
    5927           0 :                 fd = spdk_nvme_ctrlr_get_admin_qp_fd(nvme_ctrlr->ctrlr, &opts);
    5928           0 :                 if (fd < 0) {
    5929           0 :                         rc = fd;
    5930           0 :                         goto err;
    5931             :                 }
    5932             : 
    5933           0 :                 nvme_ctrlr->intr = SPDK_INTERRUPT_REGISTER_EXT(fd, bdev_nvme_poll_adminq,
    5934             :                                    nvme_ctrlr, &opts);
    5935           0 :                 if (!nvme_ctrlr->intr) {
    5936           0 :                         rc = -EINVAL;
    5937           0 :                         goto err;
    5938             :                 }
    5939           0 :         }
    5940             : 
    5941          61 :         if (g_opts.timeout_us > 0) {
    5942             :                 /* Register timeout callback. Timeout values for IO vs. admin reqs can be different. */
    5943             :                 /* If timeout_admin_us is 0 (not specified), admin uses same timeout as IO. */
    5944           0 :                 uint64_t adm_timeout_us = (g_opts.timeout_admin_us == 0) ?
    5945           0 :                                           g_opts.timeout_us : g_opts.timeout_admin_us;
    5946           0 :                 spdk_nvme_ctrlr_register_timeout_callback(ctrlr, g_opts.timeout_us,
    5947           0 :                                 adm_timeout_us, timeout_cb, nvme_ctrlr);
    5948           0 :         }
    5949             : 
    5950          61 :         spdk_nvme_ctrlr_register_aer_callback(ctrlr, aer_cb, nvme_ctrlr);
    5951          61 :         spdk_nvme_ctrlr_set_remove_cb(ctrlr, remove_cb, nvme_ctrlr);
    5952             : 
    5953          61 :         if (spdk_nvme_ctrlr_get_flags(ctrlr) &
    5954             :             SPDK_NVME_CTRLR_SECURITY_SEND_RECV_SUPPORTED) {
    5955           0 :                 nvme_ctrlr->opal_dev = spdk_opal_dev_construct(ctrlr);
    5956           0 :         }
    5957             : 
    5958          61 :         rc = nvme_bdev_ctrlr_create(name, nvme_ctrlr);
    5959          61 :         if (rc != 0) {
    5960           1 :                 goto err;
    5961             :         }
    5962             : 
    5963          60 :         cdata = spdk_nvme_ctrlr_get_data(ctrlr);
    5964             : 
    5965          60 :         if (cdata->cmic.ana_reporting) {
    5966          30 :                 rc = nvme_ctrlr_init_ana_log_page(nvme_ctrlr, ctx);
    5967          30 :                 if (rc == 0) {
    5968          30 :                         return 0;
    5969             :                 }
    5970           0 :         } else {
    5971          30 :                 nvme_ctrlr_create_done(nvme_ctrlr, ctx);
    5972          30 :                 return 0;
    5973             :         }
    5974             : 
    5975             : err:
    5976           1 :         nvme_ctrlr_delete(nvme_ctrlr);
    5977           1 :         return rc;
    5978          61 : }
    5979             : 
    5980             : void
    5981          33 : spdk_bdev_nvme_get_default_ctrlr_opts(struct spdk_bdev_nvme_ctrlr_opts *opts)
    5982             : {
    5983          33 :         opts->prchk_flags = 0;
    5984          33 :         opts->ctrlr_loss_timeout_sec = g_opts.ctrlr_loss_timeout_sec;
    5985          33 :         opts->reconnect_delay_sec = g_opts.reconnect_delay_sec;
    5986          33 :         opts->fast_io_fail_timeout_sec = g_opts.fast_io_fail_timeout_sec;
    5987          33 :         opts->multipath = true;
    5988          33 : }
    5989             : 
    5990             : static void
    5991           0 : attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    5992             :           struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *drv_opts)
    5993             : {
    5994             :         char *name;
    5995             : 
    5996           0 :         name = spdk_sprintf_alloc("HotInNvme%d", g_hot_insert_nvme_controller_index++);
    5997           0 :         if (!name) {
    5998           0 :                 SPDK_ERRLOG("Failed to assign name to NVMe device\n");
    5999           0 :                 return;
    6000             :         }
    6001             : 
    6002           0 :         if (nvme_ctrlr_create(ctrlr, name, trid, NULL) == 0) {
    6003           0 :                 SPDK_DEBUGLOG(bdev_nvme, "Attached to %s (%s)\n", trid->traddr, name);
    6004           0 :         } else {
    6005           0 :                 SPDK_ERRLOG("Failed to attach to %s (%s)\n", trid->traddr, name);
    6006             :         }
    6007             : 
    6008           0 :         free(name);
    6009           0 : }
    6010             : 
    6011             : static void
    6012          60 : _nvme_ctrlr_destruct(void *ctx)
    6013             : {
    6014          60 :         struct nvme_ctrlr *nvme_ctrlr = ctx;
    6015             : 
    6016          60 :         nvme_ctrlr_depopulate_namespaces(nvme_ctrlr);
    6017          60 :         nvme_ctrlr_release(nvme_ctrlr);
    6018          60 : }
    6019             : 
    6020             : static int
    6021          57 : bdev_nvme_delete_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    6022             : {
    6023             :         struct nvme_probe_skip_entry *entry;
    6024             : 
    6025             :         /* The controller's destruction was already started */
    6026          57 :         if (nvme_ctrlr->destruct) {
    6027           0 :                 return -EALREADY;
    6028             :         }
    6029             : 
    6030          57 :         if (!hotplug &&
    6031          57 :             nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6032           0 :                 entry = calloc(1, sizeof(*entry));
    6033           0 :                 if (!entry) {
    6034           0 :                         return -ENOMEM;
    6035             :                 }
    6036           0 :                 entry->trid = nvme_ctrlr->active_path_id->trid;
    6037           0 :                 TAILQ_INSERT_TAIL(&g_skipped_nvme_ctrlrs, entry, tailq);
    6038           0 :         }
    6039             : 
    6040          57 :         nvme_ctrlr->destruct = true;
    6041          57 :         return 0;
    6042          57 : }
    6043             : 
    6044             : static int
    6045           2 : bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
    6046             : {
    6047             :         int rc;
    6048             : 
    6049           2 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6050           2 :         rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, hotplug);
    6051           2 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6052             : 
    6053           2 :         if (rc == 0) {
    6054           2 :                 _nvme_ctrlr_destruct(nvme_ctrlr);
    6055           2 :         } else if (rc == -EALREADY) {
    6056           0 :                 rc = 0;
    6057           0 :         }
    6058             : 
    6059           2 :         return rc;
    6060             : }
    6061             : 
    6062             : static void
    6063           0 : remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
    6064             : {
    6065           0 :         struct nvme_ctrlr *nvme_ctrlr = cb_ctx;
    6066             : 
    6067           0 :         bdev_nvme_delete_ctrlr(nvme_ctrlr, true);
    6068           0 : }
    6069             : 
    6070             : static int
    6071           0 : bdev_nvme_hotplug_probe(void *arg)
    6072             : {
    6073           0 :         if (g_hotplug_probe_ctx == NULL) {
    6074           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    6075           0 :                 return SPDK_POLLER_IDLE;
    6076             :         }
    6077             : 
    6078           0 :         if (spdk_nvme_probe_poll_async(g_hotplug_probe_ctx) != -EAGAIN) {
    6079           0 :                 g_hotplug_probe_ctx = NULL;
    6080           0 :                 spdk_poller_unregister(&g_hotplug_probe_poller);
    6081           0 :         }
    6082             : 
    6083           0 :         return SPDK_POLLER_BUSY;
    6084           0 : }
    6085             : 
    6086             : static int
    6087           0 : bdev_nvme_hotplug(void *arg)
    6088             : {
    6089             :         struct spdk_nvme_transport_id trid_pcie;
    6090             : 
    6091           0 :         if (g_hotplug_probe_ctx) {
    6092           0 :                 return SPDK_POLLER_BUSY;
    6093             :         }
    6094             : 
    6095           0 :         memset(&trid_pcie, 0, sizeof(trid_pcie));
    6096           0 :         spdk_nvme_trid_populate_transport(&trid_pcie, SPDK_NVME_TRANSPORT_PCIE);
    6097             : 
    6098           0 :         g_hotplug_probe_ctx = spdk_nvme_probe_async(&trid_pcie, NULL,
    6099             :                               hotplug_probe_cb, attach_cb, NULL);
    6100             : 
    6101           0 :         if (g_hotplug_probe_ctx) {
    6102           0 :                 assert(g_hotplug_probe_poller == NULL);
    6103           0 :                 g_hotplug_probe_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug_probe, NULL, 1000);
    6104           0 :         }
    6105             : 
    6106           0 :         return SPDK_POLLER_BUSY;
    6107           0 : }
    6108             : 
    6109             : void
    6110           0 : bdev_nvme_get_opts(struct spdk_bdev_nvme_opts *opts)
    6111             : {
    6112           0 :         *opts = g_opts;
    6113           0 : }
    6114             : 
    6115             : static bool bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    6116             :                 uint32_t reconnect_delay_sec,
    6117             :                 uint32_t fast_io_fail_timeout_sec);
    6118             : 
    6119             : static int
    6120           0 : bdev_nvme_validate_opts(const struct spdk_bdev_nvme_opts *opts)
    6121             : {
    6122           0 :         if ((opts->timeout_us == 0) && (opts->timeout_admin_us != 0)) {
    6123             :                 /* Can't set timeout_admin_us without also setting timeout_us */
    6124           0 :                 SPDK_WARNLOG("Invalid options: Can't have (timeout_us == 0) with (timeout_admin_us > 0)\n");
    6125           0 :                 return -EINVAL;
    6126             :         }
    6127             : 
    6128           0 :         if (opts->bdev_retry_count < -1) {
    6129           0 :                 SPDK_WARNLOG("Invalid option: bdev_retry_count can't be less than -1.\n");
    6130           0 :                 return -EINVAL;
    6131             :         }
    6132             : 
    6133           0 :         if (!bdev_nvme_check_io_error_resiliency_params(opts->ctrlr_loss_timeout_sec,
    6134           0 :                         opts->reconnect_delay_sec,
    6135           0 :                         opts->fast_io_fail_timeout_sec)) {
    6136           0 :                 return -EINVAL;
    6137             :         }
    6138             : 
    6139           0 :         return 0;
    6140           0 : }
    6141             : 
    6142             : int
    6143           0 : bdev_nvme_set_opts(const struct spdk_bdev_nvme_opts *opts)
    6144             : {
    6145             :         int ret;
    6146             : 
    6147           0 :         ret = bdev_nvme_validate_opts(opts);
    6148           0 :         if (ret) {
    6149           0 :                 SPDK_WARNLOG("Failed to set nvme opts.\n");
    6150           0 :                 return ret;
    6151             :         }
    6152             : 
    6153           0 :         if (g_bdev_nvme_init_thread != NULL) {
    6154           0 :                 if (!TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    6155           0 :                         return -EPERM;
    6156             :                 }
    6157           0 :         }
    6158             : 
    6159           0 :         if (opts->rdma_srq_size != 0 ||
    6160           0 :             opts->rdma_max_cq_size != 0 ||
    6161           0 :             opts->rdma_cm_event_timeout_ms != 0) {
    6162             :                 struct spdk_nvme_transport_opts drv_opts;
    6163             : 
    6164           0 :                 spdk_nvme_transport_get_opts(&drv_opts, sizeof(drv_opts));
    6165           0 :                 if (opts->rdma_srq_size != 0) {
    6166           0 :                         drv_opts.rdma_srq_size = opts->rdma_srq_size;
    6167           0 :                 }
    6168           0 :                 if (opts->rdma_max_cq_size != 0) {
    6169           0 :                         drv_opts.rdma_max_cq_size = opts->rdma_max_cq_size;
    6170           0 :                 }
    6171           0 :                 if (opts->rdma_cm_event_timeout_ms != 0) {
    6172           0 :                         drv_opts.rdma_cm_event_timeout_ms = opts->rdma_cm_event_timeout_ms;
    6173           0 :                 }
    6174             : 
    6175           0 :                 ret = spdk_nvme_transport_set_opts(&drv_opts, sizeof(drv_opts));
    6176           0 :                 if (ret) {
    6177           0 :                         SPDK_ERRLOG("Failed to set NVMe transport opts.\n");
    6178           0 :                         return ret;
    6179             :                 }
    6180           0 :         }
    6181             : 
    6182           0 :         g_opts = *opts;
    6183             : 
    6184           0 :         return 0;
    6185           0 : }
    6186             : 
    6187             : struct set_nvme_hotplug_ctx {
    6188             :         uint64_t period_us;
    6189             :         bool enabled;
    6190             :         spdk_msg_fn fn;
    6191             :         void *fn_ctx;
    6192             : };
    6193             : 
    6194             : static void
    6195           0 : set_nvme_hotplug_period_cb(void *_ctx)
    6196             : {
    6197           0 :         struct set_nvme_hotplug_ctx *ctx = _ctx;
    6198             : 
    6199           0 :         spdk_poller_unregister(&g_hotplug_poller);
    6200           0 :         if (ctx->enabled) {
    6201           0 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_hotplug, NULL, ctx->period_us);
    6202           0 :         } else {
    6203           0 :                 g_hotplug_poller = SPDK_POLLER_REGISTER(bdev_nvme_remove_poller, NULL,
    6204             :                                                         NVME_HOTPLUG_POLL_PERIOD_DEFAULT);
    6205             :         }
    6206             : 
    6207           0 :         g_nvme_hotplug_poll_period_us = ctx->period_us;
    6208           0 :         g_nvme_hotplug_enabled = ctx->enabled;
    6209           0 :         if (ctx->fn) {
    6210           0 :                 ctx->fn(ctx->fn_ctx);
    6211           0 :         }
    6212             : 
    6213           0 :         free(ctx);
    6214           0 : }
    6215             : 
    6216             : int
    6217           0 : bdev_nvme_set_hotplug(bool enabled, uint64_t period_us, spdk_msg_fn cb, void *cb_ctx)
    6218             : {
    6219             :         struct set_nvme_hotplug_ctx *ctx;
    6220             : 
    6221           0 :         if (enabled == true && !spdk_process_is_primary()) {
    6222           0 :                 return -EPERM;
    6223             :         }
    6224             : 
    6225           0 :         ctx = calloc(1, sizeof(*ctx));
    6226           0 :         if (ctx == NULL) {
    6227           0 :                 return -ENOMEM;
    6228             :         }
    6229             : 
    6230           0 :         period_us = period_us == 0 ? NVME_HOTPLUG_POLL_PERIOD_DEFAULT : period_us;
    6231           0 :         ctx->period_us = spdk_min(period_us, NVME_HOTPLUG_POLL_PERIOD_MAX);
    6232           0 :         ctx->enabled = enabled;
    6233           0 :         ctx->fn = cb;
    6234           0 :         ctx->fn_ctx = cb_ctx;
    6235             : 
    6236           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, set_nvme_hotplug_period_cb, ctx);
    6237           0 :         return 0;
    6238           0 : }
    6239             : 
    6240             : static void
    6241          46 : nvme_ctrlr_populate_namespaces_done(struct nvme_ctrlr *nvme_ctrlr,
    6242             :                                     struct nvme_async_probe_ctx *ctx)
    6243             : {
    6244             :         struct nvme_ns  *nvme_ns;
    6245             :         struct nvme_bdev        *nvme_bdev;
    6246             :         size_t                  j;
    6247             : 
    6248          46 :         assert(nvme_ctrlr != NULL);
    6249             : 
    6250          46 :         if (ctx->names == NULL) {
    6251           0 :                 ctx->reported_bdevs = 0;
    6252           0 :                 populate_namespaces_cb(ctx, 0);
    6253           0 :                 return;
    6254             :         }
    6255             : 
    6256             :         /*
    6257             :          * Report the new bdevs that were created in this call.
    6258             :          * There can be more than one bdev per NVMe controller.
    6259             :          */
    6260          46 :         j = 0;
    6261          46 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    6262          94 :         while (nvme_ns != NULL) {
    6263          48 :                 nvme_bdev = nvme_ns->bdev;
    6264          48 :                 if (j < ctx->max_bdevs) {
    6265          48 :                         ctx->names[j] = nvme_bdev->disk.name;
    6266          48 :                         j++;
    6267          48 :                 } else {
    6268           0 :                         NVME_CTRLR_ERRLOG(nvme_ctrlr,
    6269             :                                           "Maximum number of namespaces supported per NVMe controller is %du. "
    6270             :                                           "Unable to return all names of created bdevs\n",
    6271             :                                           ctx->max_bdevs);
    6272           0 :                         ctx->reported_bdevs = 0;
    6273           0 :                         populate_namespaces_cb(ctx, -ERANGE);
    6274           0 :                         return;
    6275             :                 }
    6276             : 
    6277          48 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    6278             :         }
    6279             : 
    6280          46 :         ctx->reported_bdevs = j;
    6281          46 :         populate_namespaces_cb(ctx, 0);
    6282          46 : }
    6283             : 
    6284             : static int
    6285           9 : bdev_nvme_check_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6286             :                                struct spdk_nvme_ctrlr *new_ctrlr,
    6287             :                                struct spdk_nvme_transport_id *trid)
    6288             : {
    6289             :         struct nvme_path_id *tmp_trid;
    6290             : 
    6291           9 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6292           0 :                 NVME_CTRLR_ERRLOG(nvme_ctrlr, "PCIe failover is not supported.\n");
    6293           0 :                 return -ENOTSUP;
    6294             :         }
    6295             : 
    6296             :         /* Currently we only support failover to the same transport type. */
    6297           9 :         if (nvme_ctrlr->active_path_id->trid.trtype != trid->trtype) {
    6298           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr,
    6299             :                                    "Failover from trtype: %s to a different trtype: %s is not supported currently\n",
    6300             :                                    spdk_nvme_transport_id_trtype_str(nvme_ctrlr->active_path_id->trid.trtype),
    6301             :                                    spdk_nvme_transport_id_trtype_str(trid->trtype));
    6302           0 :                 return -EINVAL;
    6303             :         }
    6304             : 
    6305             : 
    6306             :         /* Currently we only support failover to the same NQN. */
    6307           9 :         if (strncmp(trid->subnqn, nvme_ctrlr->active_path_id->trid.subnqn, SPDK_NVMF_NQN_MAX_LEN)) {
    6308           0 :                 NVME_CTRLR_WARNLOG(nvme_ctrlr,
    6309             :                                    "Failover from subnqn: %s to a different subnqn: %s is not supported currently\n",
    6310             :                                    nvme_ctrlr->active_path_id->trid.subnqn, trid->subnqn);
    6311           0 :                 return -EINVAL;
    6312             :         }
    6313             : 
    6314             :         /* Skip all the other checks if we've already registered this path. */
    6315          21 :         TAILQ_FOREACH(tmp_trid, &nvme_ctrlr->trids, link) {
    6316          12 :                 if (!spdk_nvme_transport_id_compare(&tmp_trid->trid, trid)) {
    6317           0 :                         NVME_CTRLR_WARNLOG(nvme_ctrlr, "This path (traddr: %s subnqn: %s) is already registered\n",
    6318             :                                            trid->traddr, trid->subnqn);
    6319           0 :                         return -EALREADY;
    6320             :                 }
    6321          12 :         }
    6322             : 
    6323           9 :         return 0;
    6324           9 : }
    6325             : 
    6326             : static int
    6327           9 : bdev_nvme_check_secondary_namespace(struct nvme_ctrlr *nvme_ctrlr,
    6328             :                                     struct spdk_nvme_ctrlr *new_ctrlr)
    6329             : {
    6330             :         struct nvme_ns *nvme_ns;
    6331             :         struct spdk_nvme_ns *new_ns;
    6332             : 
    6333           9 :         nvme_ns = nvme_ctrlr_get_first_active_ns(nvme_ctrlr);
    6334           9 :         while (nvme_ns != NULL) {
    6335           0 :                 new_ns = spdk_nvme_ctrlr_get_ns(new_ctrlr, nvme_ns->id);
    6336           0 :                 assert(new_ns != NULL);
    6337             : 
    6338           0 :                 if (!bdev_nvme_compare_ns(nvme_ns->ns, new_ns)) {
    6339           0 :                         return -EINVAL;
    6340             :                 }
    6341             : 
    6342           0 :                 nvme_ns = nvme_ctrlr_get_next_active_ns(nvme_ctrlr, nvme_ns);
    6343             :         }
    6344             : 
    6345           9 :         return 0;
    6346           9 : }
    6347             : 
    6348             : static int
    6349           9 : _bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6350             :                               struct spdk_nvme_transport_id *trid)
    6351             : {
    6352             :         struct nvme_path_id *active_id, *new_trid, *tmp_trid;
    6353             : 
    6354           9 :         new_trid = calloc(1, sizeof(*new_trid));
    6355           9 :         if (new_trid == NULL) {
    6356           0 :                 return -ENOMEM;
    6357             :         }
    6358           9 :         new_trid->trid = *trid;
    6359             : 
    6360           9 :         active_id = nvme_ctrlr->active_path_id;
    6361           9 :         assert(active_id != NULL);
    6362           9 :         assert(active_id == TAILQ_FIRST(&nvme_ctrlr->trids));
    6363             : 
    6364             :         /* Skip the active trid not to replace it until it is failed. */
    6365           9 :         tmp_trid = TAILQ_NEXT(active_id, link);
    6366           9 :         if (tmp_trid == NULL) {
    6367           6 :                 goto add_tail;
    6368             :         }
    6369             : 
    6370             :         /* It means the trid is faled if its last failed time is non-zero.
    6371             :          * Insert the new alternate trid before any failed trid.
    6372             :          */
    6373           5 :         TAILQ_FOREACH_FROM(tmp_trid, &nvme_ctrlr->trids, link) {
    6374           3 :                 if (tmp_trid->last_failed_tsc != 0) {
    6375           1 :                         TAILQ_INSERT_BEFORE(tmp_trid, new_trid, link);
    6376           1 :                         return 0;
    6377             :                 }
    6378           4 :         }
    6379             : 
    6380             : add_tail:
    6381           8 :         TAILQ_INSERT_TAIL(&nvme_ctrlr->trids, new_trid, link);
    6382           8 :         return 0;
    6383           9 : }
    6384             : 
    6385             : /* This is the case that a secondary path is added to an existing
    6386             :  * nvme_ctrlr for failover. After checking if it can access the same
    6387             :  * namespaces as the primary path, it is disconnected until failover occurs.
    6388             :  */
    6389             : static int
    6390           9 : bdev_nvme_add_secondary_trid(struct nvme_ctrlr *nvme_ctrlr,
    6391             :                              struct spdk_nvme_ctrlr *new_ctrlr,
    6392             :                              struct spdk_nvme_transport_id *trid)
    6393             : {
    6394             :         int rc;
    6395             : 
    6396           9 :         assert(nvme_ctrlr != NULL);
    6397             : 
    6398           9 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6399             : 
    6400           9 :         rc = bdev_nvme_check_secondary_trid(nvme_ctrlr, new_ctrlr, trid);
    6401           9 :         if (rc != 0) {
    6402           0 :                 goto exit;
    6403             :         }
    6404             : 
    6405           9 :         rc = bdev_nvme_check_secondary_namespace(nvme_ctrlr, new_ctrlr);
    6406           9 :         if (rc != 0) {
    6407           0 :                 goto exit;
    6408             :         }
    6409             : 
    6410           9 :         rc = _bdev_nvme_add_secondary_trid(nvme_ctrlr, trid);
    6411             : 
    6412             : exit:
    6413           9 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6414             : 
    6415           9 :         spdk_nvme_detach(new_ctrlr);
    6416             : 
    6417           9 :         return rc;
    6418             : }
    6419             : 
    6420             : static void
    6421          47 : connect_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6422             :                   struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    6423             : {
    6424          47 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6425             :         struct nvme_async_probe_ctx *ctx;
    6426             :         int rc;
    6427             : 
    6428          47 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6429          47 :         ctx->ctrlr_attached = true;
    6430             : 
    6431          47 :         rc = nvme_ctrlr_create(ctrlr, ctx->base_name, &ctx->trid, ctx);
    6432          47 :         if (rc != 0) {
    6433           1 :                 ctx->reported_bdevs = 0;
    6434           1 :                 populate_namespaces_cb(ctx, rc);
    6435           1 :         }
    6436          47 : }
    6437             : 
    6438             : 
    6439             : static void
    6440           4 : connect_set_failover_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    6441             :                         struct spdk_nvme_ctrlr *ctrlr,
    6442             :                         const struct spdk_nvme_ctrlr_opts *opts)
    6443             : {
    6444           4 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    6445             :         struct nvme_ctrlr *nvme_ctrlr;
    6446             :         struct nvme_async_probe_ctx *ctx;
    6447             :         int rc;
    6448             : 
    6449           4 :         ctx = SPDK_CONTAINEROF(user_opts, struct nvme_async_probe_ctx, drv_opts);
    6450           4 :         ctx->ctrlr_attached = true;
    6451             : 
    6452           4 :         nvme_ctrlr = nvme_ctrlr_get_by_name(ctx->base_name);
    6453           4 :         if (nvme_ctrlr) {
    6454           4 :                 rc = bdev_nvme_add_secondary_trid(nvme_ctrlr, ctrlr, &ctx->trid);
    6455           4 :         } else {
    6456           0 :                 rc = -ENODEV;
    6457             :         }
    6458             : 
    6459           4 :         ctx->reported_bdevs = 0;
    6460           4 :         populate_namespaces_cb(ctx, rc);
    6461           4 : }
    6462             : 
    6463             : static int
    6464          52 : bdev_nvme_async_poll(void *arg)
    6465             : {
    6466          52 :         struct nvme_async_probe_ctx     *ctx = arg;
    6467             :         int                             rc;
    6468             : 
    6469          52 :         rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    6470          52 :         if (spdk_unlikely(rc != -EAGAIN)) {
    6471          52 :                 ctx->probe_done = true;
    6472          52 :                 spdk_poller_unregister(&ctx->poller);
    6473          52 :                 if (!ctx->ctrlr_attached) {
    6474             :                         /* The probe is done, but no controller was attached.
    6475             :                          * That means we had a failure, so report -EIO back to
    6476             :                          * the caller (usually the RPC). populate_namespaces_cb()
    6477             :                          * will take care of freeing the nvme_async_probe_ctx.
    6478             :                          */
    6479           1 :                         ctx->reported_bdevs = 0;
    6480           1 :                         populate_namespaces_cb(ctx, -EIO);
    6481          52 :                 } else if (ctx->namespaces_populated) {
    6482             :                         /* The namespaces for the attached controller were all
    6483             :                          * populated and the response was already sent to the
    6484             :                          * caller (usually the RPC).  So free the context here.
    6485             :                          */
    6486          21 :                         free_nvme_async_probe_ctx(ctx);
    6487          21 :                 }
    6488          52 :         }
    6489             : 
    6490          52 :         return SPDK_POLLER_BUSY;
    6491             : }
    6492             : 
    6493             : static bool
    6494          71 : bdev_nvme_check_io_error_resiliency_params(int32_t ctrlr_loss_timeout_sec,
    6495             :                 uint32_t reconnect_delay_sec,
    6496             :                 uint32_t fast_io_fail_timeout_sec)
    6497             : {
    6498          71 :         if (ctrlr_loss_timeout_sec < -1) {
    6499           1 :                 SPDK_ERRLOG("ctrlr_loss_timeout_sec can't be less than -1.\n");
    6500           1 :                 return false;
    6501          70 :         } else if (ctrlr_loss_timeout_sec == -1) {
    6502          14 :                 if (reconnect_delay_sec == 0) {
    6503           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6504           1 :                         return false;
    6505          13 :                 } else if (fast_io_fail_timeout_sec != 0 &&
    6506           3 :                            fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6507           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io-fail_timeout_sec.\n");
    6508           1 :                         return false;
    6509             :                 }
    6510          68 :         } else if (ctrlr_loss_timeout_sec != 0) {
    6511          11 :                 if (reconnect_delay_sec == 0) {
    6512           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be 0 if ctrlr_loss_timeout_sec is not 0.\n");
    6513           1 :                         return false;
    6514          10 :                 } else if (reconnect_delay_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6515           1 :                         SPDK_ERRLOG("reconnect_delay_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6516           1 :                         return false;
    6517           9 :                 } else if (fast_io_fail_timeout_sec != 0) {
    6518           6 :                         if (fast_io_fail_timeout_sec < reconnect_delay_sec) {
    6519           1 :                                 SPDK_ERRLOG("reconnect_delay_sec can't be more than fast_io_fail_timeout_sec.\n");
    6520           1 :                                 return false;
    6521           5 :                         } else if (fast_io_fail_timeout_sec > (uint32_t)ctrlr_loss_timeout_sec) {
    6522           1 :                                 SPDK_ERRLOG("fast_io_fail_timeout_sec can't be more than ctrlr_loss_timeout_sec.\n");
    6523           1 :                                 return false;
    6524             :                         }
    6525           4 :                 }
    6526          52 :         } else if (reconnect_delay_sec != 0 || fast_io_fail_timeout_sec != 0) {
    6527           2 :                 SPDK_ERRLOG("Both reconnect_delay_sec and fast_io_fail_timeout_sec must be 0 if ctrlr_loss_timeout_sec is 0.\n");
    6528           2 :                 return false;
    6529             :         }
    6530             : 
    6531          62 :         return true;
    6532          71 : }
    6533             : 
    6534             : int
    6535          52 : spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
    6536             :                       const char *base_name,
    6537             :                       const char **names,
    6538             :                       uint32_t count,
    6539             :                       spdk_bdev_nvme_create_cb cb_fn,
    6540             :                       void *cb_ctx,
    6541             :                       struct spdk_nvme_ctrlr_opts *drv_opts,
    6542             :                       struct spdk_bdev_nvme_ctrlr_opts *bdev_opts)
    6543             : {
    6544             :         struct nvme_probe_skip_entry *entry, *tmp;
    6545             :         struct nvme_async_probe_ctx *ctx;
    6546             :         spdk_nvme_attach_cb attach_cb;
    6547             :         struct nvme_ctrlr *nvme_ctrlr;
    6548             :         int len;
    6549             : 
    6550             :         /* TODO expand this check to include both the host and target TRIDs.
    6551             :          * Only if both are the same should we fail.
    6552             :          */
    6553          52 :         if (nvme_ctrlr_get(trid, drv_opts->hostnqn) != NULL) {
    6554           0 :                 SPDK_ERRLOG("A controller with the provided trid (traddr: %s, hostnqn: %s) "
    6555             :                             "already exists.\n", trid->traddr, drv_opts->hostnqn);
    6556           0 :                 return -EEXIST;
    6557             :         }
    6558             : 
    6559          52 :         len = strnlen(base_name, SPDK_CONTROLLER_NAME_MAX);
    6560             : 
    6561          52 :         if (len == 0 || len == SPDK_CONTROLLER_NAME_MAX) {
    6562           0 :                 SPDK_ERRLOG("controller name must be between 1 and %d characters\n", SPDK_CONTROLLER_NAME_MAX - 1);
    6563           0 :                 return -EINVAL;
    6564             :         }
    6565             : 
    6566          52 :         if (bdev_opts != NULL &&
    6567         104 :             !bdev_nvme_check_io_error_resiliency_params(bdev_opts->ctrlr_loss_timeout_sec,
    6568          52 :                             bdev_opts->reconnect_delay_sec,
    6569          52 :                             bdev_opts->fast_io_fail_timeout_sec)) {
    6570           0 :                 return -EINVAL;
    6571             :         }
    6572             : 
    6573          52 :         ctx = calloc(1, sizeof(*ctx));
    6574          52 :         if (!ctx) {
    6575           0 :                 return -ENOMEM;
    6576             :         }
    6577          52 :         ctx->base_name = base_name;
    6578          52 :         ctx->names = names;
    6579          52 :         ctx->max_bdevs = count;
    6580          52 :         ctx->cb_fn = cb_fn;
    6581          52 :         ctx->cb_ctx = cb_ctx;
    6582          52 :         ctx->trid = *trid;
    6583             : 
    6584          52 :         if (bdev_opts) {
    6585          52 :                 memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    6586          52 :         } else {
    6587           0 :                 spdk_bdev_nvme_get_default_ctrlr_opts(&ctx->bdev_opts);
    6588             :         }
    6589             : 
    6590          52 :         if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6591           0 :                 TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, tmp) {
    6592           0 :                         if (spdk_nvme_transport_id_compare(trid, &entry->trid) == 0) {
    6593           0 :                                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    6594           0 :                                 free(entry);
    6595           0 :                                 break;
    6596             :                         }
    6597           0 :                 }
    6598           0 :         }
    6599             : 
    6600          52 :         memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    6601          52 :         ctx->drv_opts.transport_retry_count = g_opts.transport_retry_count;
    6602          52 :         ctx->drv_opts.transport_ack_timeout = g_opts.transport_ack_timeout;
    6603          52 :         ctx->drv_opts.keep_alive_timeout_ms = g_opts.keep_alive_timeout_ms;
    6604          52 :         ctx->drv_opts.disable_read_ana_log_page = true;
    6605          52 :         ctx->drv_opts.transport_tos = g_opts.transport_tos;
    6606             : 
    6607          52 :         if (spdk_interrupt_mode_is_enabled()) {
    6608           0 :                 if (trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
    6609           0 :                         ctx->drv_opts.enable_interrupts = true;
    6610           0 :                 } else {
    6611           0 :                         SPDK_ERRLOG("Interrupt mode is only supported with PCIe transport\n");
    6612           0 :                         free_nvme_async_probe_ctx(ctx);
    6613           0 :                         return -ENOTSUP;
    6614             :                 }
    6615           0 :         }
    6616             : 
    6617          52 :         if (ctx->bdev_opts.psk != NULL) {
    6618           0 :                 ctx->drv_opts.tls_psk = spdk_keyring_get_key(ctx->bdev_opts.psk);
    6619           0 :                 if (ctx->drv_opts.tls_psk == NULL) {
    6620           0 :                         SPDK_ERRLOG("Could not load PSK: %s\n", ctx->bdev_opts.psk);
    6621           0 :                         free_nvme_async_probe_ctx(ctx);
    6622           0 :                         return -ENOKEY;
    6623             :                 }
    6624           0 :         }
    6625             : 
    6626          52 :         if (ctx->bdev_opts.dhchap_key != NULL) {
    6627           0 :                 ctx->drv_opts.dhchap_key = spdk_keyring_get_key(ctx->bdev_opts.dhchap_key);
    6628           0 :                 if (ctx->drv_opts.dhchap_key == NULL) {
    6629           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP key: %s\n",
    6630             :                                     ctx->bdev_opts.dhchap_key);
    6631           0 :                         free_nvme_async_probe_ctx(ctx);
    6632           0 :                         return -ENOKEY;
    6633             :                 }
    6634             : 
    6635           0 :                 ctx->drv_opts.dhchap_digests = g_opts.dhchap_digests;
    6636           0 :                 ctx->drv_opts.dhchap_dhgroups = g_opts.dhchap_dhgroups;
    6637           0 :         }
    6638          52 :         if (ctx->bdev_opts.dhchap_ctrlr_key != NULL) {
    6639           0 :                 ctx->drv_opts.dhchap_ctrlr_key =
    6640           0 :                         spdk_keyring_get_key(ctx->bdev_opts.dhchap_ctrlr_key);
    6641           0 :                 if (ctx->drv_opts.dhchap_ctrlr_key == NULL) {
    6642           0 :                         SPDK_ERRLOG("Could not load DH-HMAC-CHAP controller key: %s\n",
    6643             :                                     ctx->bdev_opts.dhchap_ctrlr_key);
    6644           0 :                         free_nvme_async_probe_ctx(ctx);
    6645           0 :                         return -ENOKEY;
    6646             :                 }
    6647           0 :         }
    6648             : 
    6649          52 :         if (nvme_bdev_ctrlr_get_by_name(base_name) == NULL || ctx->bdev_opts.multipath) {
    6650          48 :                 attach_cb = connect_attach_cb;
    6651          48 :         } else {
    6652           4 :                 attach_cb = connect_set_failover_cb;
    6653             :         }
    6654             : 
    6655          52 :         nvme_ctrlr = nvme_ctrlr_get_by_name(ctx->base_name);
    6656          52 :         if (nvme_ctrlr  && nvme_ctrlr->opts.multipath != ctx->bdev_opts.multipath) {
    6657             :                 /* All controllers with the same name must be configured the same
    6658             :                  * way, either for multipath or failover. If the configuration doesn't
    6659             :                  * match - report error.
    6660             :                  */
    6661           0 :                 free_nvme_async_probe_ctx(ctx);
    6662           0 :                 return -EINVAL;
    6663             :         }
    6664             : 
    6665          52 :         ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, attach_cb);
    6666          52 :         if (ctx->probe_ctx == NULL) {
    6667           0 :                 SPDK_ERRLOG("No controller was found with provided trid (traddr: %s)\n", trid->traddr);
    6668           0 :                 free_nvme_async_probe_ctx(ctx);
    6669           0 :                 return -ENODEV;
    6670             :         }
    6671          52 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_async_poll, ctx, 1000);
    6672             : 
    6673          52 :         return 0;
    6674          52 : }
    6675             : 
    6676             : struct bdev_nvme_delete_ctx {
    6677             :         char                        *name;
    6678             :         struct nvme_path_id         path_id;
    6679             :         bdev_nvme_delete_done_fn    delete_done;
    6680             :         void                        *delete_done_ctx;
    6681             :         uint64_t                    timeout_ticks;
    6682             :         struct spdk_poller          *poller;
    6683             : };
    6684             : 
    6685             : static void
    6686           2 : free_bdev_nvme_delete_ctx(struct bdev_nvme_delete_ctx *ctx)
    6687             : {
    6688           2 :         if (ctx != NULL) {
    6689           1 :                 free(ctx->name);
    6690           1 :                 free(ctx);
    6691           1 :         }
    6692           2 : }
    6693             : 
    6694             : static bool
    6695          75 : nvme_path_id_compare(struct nvme_path_id *p, const struct nvme_path_id *path_id)
    6696             : {
    6697          75 :         if (path_id->trid.trtype != 0) {
    6698          21 :                 if (path_id->trid.trtype == SPDK_NVME_TRANSPORT_CUSTOM) {
    6699           0 :                         if (strcasecmp(path_id->trid.trstring, p->trid.trstring) != 0) {
    6700           0 :                                 return false;
    6701             :                         }
    6702           0 :                 } else {
    6703          21 :                         if (path_id->trid.trtype != p->trid.trtype) {
    6704           0 :                                 return false;
    6705             :                         }
    6706             :                 }
    6707          21 :         }
    6708             : 
    6709          75 :         if (!spdk_mem_all_zero(path_id->trid.traddr, sizeof(path_id->trid.traddr))) {
    6710          21 :                 if (strcasecmp(path_id->trid.traddr, p->trid.traddr) != 0) {
    6711          11 :                         return false;
    6712             :                 }
    6713          10 :         }
    6714             : 
    6715          64 :         if (path_id->trid.adrfam != 0) {
    6716           0 :                 if (path_id->trid.adrfam != p->trid.adrfam) {
    6717           0 :                         return false;
    6718             :                 }
    6719           0 :         }
    6720             : 
    6721          64 :         if (!spdk_mem_all_zero(path_id->trid.trsvcid, sizeof(path_id->trid.trsvcid))) {
    6722          10 :                 if (strcasecmp(path_id->trid.trsvcid, p->trid.trsvcid) != 0) {
    6723           0 :                         return false;
    6724             :                 }
    6725          10 :         }
    6726             : 
    6727          64 :         if (!spdk_mem_all_zero(path_id->trid.subnqn, sizeof(path_id->trid.subnqn))) {
    6728          10 :                 if (strcmp(path_id->trid.subnqn, p->trid.subnqn) != 0) {
    6729           0 :                         return false;
    6730             :                 }
    6731          10 :         }
    6732             : 
    6733          64 :         if (!spdk_mem_all_zero(path_id->hostid.hostaddr, sizeof(path_id->hostid.hostaddr))) {
    6734           0 :                 if (strcmp(path_id->hostid.hostaddr, p->hostid.hostaddr) != 0) {
    6735           0 :                         return false;
    6736             :                 }
    6737           0 :         }
    6738             : 
    6739          64 :         if (!spdk_mem_all_zero(path_id->hostid.hostsvcid, sizeof(path_id->hostid.hostsvcid))) {
    6740           0 :                 if (strcmp(path_id->hostid.hostsvcid, p->hostid.hostsvcid) != 0) {
    6741           0 :                         return false;
    6742             :                 }
    6743           0 :         }
    6744             : 
    6745          64 :         return true;
    6746          75 : }
    6747             : 
    6748             : static bool
    6749           2 : nvme_path_id_exists(const char *name, const struct nvme_path_id *path_id)
    6750             : {
    6751             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    6752             :         struct nvme_ctrlr       *ctrlr;
    6753             :         struct nvme_path_id     *p;
    6754             : 
    6755           2 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6756           2 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6757           2 :         if (!nbdev_ctrlr) {
    6758           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6759           1 :                 return false;
    6760             :         }
    6761             : 
    6762           1 :         TAILQ_FOREACH(ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    6763           1 :                 pthread_mutex_lock(&ctrlr->mutex);
    6764           1 :                 TAILQ_FOREACH(p, &ctrlr->trids, link) {
    6765           1 :                         if (nvme_path_id_compare(p, path_id)) {
    6766           1 :                                 pthread_mutex_unlock(&ctrlr->mutex);
    6767           1 :                                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6768           1 :                                 return true;
    6769             :                         }
    6770           0 :                 }
    6771           0 :                 pthread_mutex_unlock(&ctrlr->mutex);
    6772           0 :         }
    6773           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6774             : 
    6775           0 :         return false;
    6776           2 : }
    6777             : 
    6778             : static int
    6779           2 : bdev_nvme_delete_complete_poll(void *arg)
    6780             : {
    6781           2 :         struct bdev_nvme_delete_ctx     *ctx = arg;
    6782           2 :         int                             rc = 0;
    6783             : 
    6784           2 :         if (nvme_path_id_exists(ctx->name, &ctx->path_id)) {
    6785           1 :                 if (ctx->timeout_ticks > spdk_get_ticks()) {
    6786           1 :                         return SPDK_POLLER_BUSY;
    6787             :                 }
    6788             : 
    6789           0 :                 SPDK_ERRLOG("NVMe path '%s' still exists after delete\n", ctx->name);
    6790           0 :                 rc = -ETIMEDOUT;
    6791           0 :         }
    6792             : 
    6793           1 :         spdk_poller_unregister(&ctx->poller);
    6794             : 
    6795           1 :         ctx->delete_done(ctx->delete_done_ctx, rc);
    6796           1 :         free_bdev_nvme_delete_ctx(ctx);
    6797             : 
    6798           1 :         return SPDK_POLLER_BUSY;
    6799           2 : }
    6800             : 
    6801             : static int
    6802          64 : _bdev_nvme_delete(struct nvme_ctrlr *nvme_ctrlr, const struct nvme_path_id *path_id)
    6803             : {
    6804             :         struct nvme_path_id     *p, *t;
    6805             :         spdk_msg_fn             msg_fn;
    6806          64 :         int                     rc = -ENXIO;
    6807             : 
    6808          64 :         pthread_mutex_lock(&nvme_ctrlr->mutex);
    6809             : 
    6810          74 :         TAILQ_FOREACH_REVERSE_SAFE(p, &nvme_ctrlr->trids, nvme_paths, link, t) {
    6811          74 :                 if (p == TAILQ_FIRST(&nvme_ctrlr->trids)) {
    6812          64 :                         break;
    6813             :                 }
    6814             : 
    6815          10 :                 if (!nvme_path_id_compare(p, path_id)) {
    6816           3 :                         continue;
    6817             :                 }
    6818             : 
    6819             :                 /* We are not using the specified path. */
    6820           7 :                 TAILQ_REMOVE(&nvme_ctrlr->trids, p, link);
    6821           7 :                 free(p);
    6822           7 :                 rc = 0;
    6823           7 :         }
    6824             : 
    6825          64 :         if (p == NULL || !nvme_path_id_compare(p, path_id)) {
    6826           8 :                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6827           8 :                 return rc;
    6828             :         }
    6829             : 
    6830             :         /* If we made it here, then this path is a match! Now we need to remove it. */
    6831             : 
    6832             :         /* This is the active path in use right now. The active path is always the first in the list. */
    6833          56 :         assert(p == nvme_ctrlr->active_path_id);
    6834             : 
    6835          56 :         if (!TAILQ_NEXT(p, link)) {
    6836             :                 /* The current path is the only path. */
    6837          55 :                 msg_fn = _nvme_ctrlr_destruct;
    6838          55 :                 rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, false);
    6839          55 :         } else {
    6840             :                 /* There is an alternative path. */
    6841           1 :                 msg_fn = _bdev_nvme_reset_ctrlr;
    6842           1 :                 rc = bdev_nvme_failover_ctrlr_unsafe(nvme_ctrlr, true);
    6843             :         }
    6844             : 
    6845          56 :         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    6846             : 
    6847          56 :         if (rc == 0) {
    6848          56 :                 spdk_thread_send_msg(nvme_ctrlr->thread, msg_fn, nvme_ctrlr);
    6849          56 :         } else if (rc == -EALREADY) {
    6850           0 :                 rc = 0;
    6851           0 :         }
    6852             : 
    6853          56 :         return rc;
    6854          64 : }
    6855             : 
    6856             : int
    6857          49 : bdev_nvme_delete(const char *name, const struct nvme_path_id *path_id,
    6858             :                  bdev_nvme_delete_done_fn delete_done, void *delete_done_ctx)
    6859             : {
    6860             :         struct nvme_bdev_ctrlr          *nbdev_ctrlr;
    6861             :         struct nvme_ctrlr               *nvme_ctrlr, *tmp_nvme_ctrlr;
    6862          49 :         struct bdev_nvme_delete_ctx     *ctx = NULL;
    6863          49 :         int                             rc = -ENXIO, _rc;
    6864             : 
    6865          49 :         if (name == NULL || path_id == NULL) {
    6866           0 :                 rc = -EINVAL;
    6867           0 :                 goto exit;
    6868             :         }
    6869             : 
    6870          49 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    6871             : 
    6872          49 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    6873          49 :         if (nbdev_ctrlr == NULL) {
    6874           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6875             : 
    6876           0 :                 SPDK_ERRLOG("Failed to find NVMe bdev controller\n");
    6877           0 :                 rc = -ENODEV;
    6878           0 :                 goto exit;
    6879             :         }
    6880             : 
    6881         113 :         TAILQ_FOREACH_SAFE(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq, tmp_nvme_ctrlr) {
    6882          64 :                 _rc = _bdev_nvme_delete(nvme_ctrlr, path_id);
    6883          64 :                 if (_rc < 0 && _rc != -ENXIO) {
    6884           0 :                         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6885           0 :                         rc = _rc;
    6886           0 :                         goto exit;
    6887          64 :                 } else if (_rc == 0) {
    6888             :                         /* We traverse all remaining nvme_ctrlrs even if one nvme_ctrlr
    6889             :                          * was deleted successfully. To remember the successful deletion,
    6890             :                          * overwrite rc only if _rc is zero.
    6891             :                          */
    6892          58 :                         rc = 0;
    6893          58 :                 }
    6894          64 :         }
    6895             : 
    6896          49 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    6897             : 
    6898          49 :         if (rc != 0 || delete_done == NULL) {
    6899          48 :                 goto exit;
    6900             :         }
    6901             : 
    6902           1 :         ctx = calloc(1, sizeof(*ctx));
    6903           1 :         if (ctx == NULL) {
    6904           0 :                 SPDK_ERRLOG("Failed to allocate context for bdev_nvme_delete\n");
    6905           0 :                 rc = -ENOMEM;
    6906           0 :                 goto exit;
    6907             :         }
    6908             : 
    6909           1 :         ctx->name = strdup(name);
    6910           1 :         if (ctx->name == NULL) {
    6911           0 :                 SPDK_ERRLOG("Failed to copy controller name for deletion\n");
    6912           0 :                 rc = -ENOMEM;
    6913           0 :                 goto exit;
    6914             :         }
    6915             : 
    6916           1 :         ctx->delete_done = delete_done;
    6917           1 :         ctx->delete_done_ctx = delete_done_ctx;
    6918           1 :         ctx->path_id = *path_id;
    6919           1 :         ctx->timeout_ticks = spdk_get_ticks() + 10 * spdk_get_ticks_hz();
    6920           1 :         ctx->poller = SPDK_POLLER_REGISTER(bdev_nvme_delete_complete_poll, ctx, 1000);
    6921           1 :         if (ctx->poller == NULL) {
    6922           0 :                 SPDK_ERRLOG("Failed to register bdev_nvme_delete poller\n");
    6923           0 :                 rc = -ENOMEM;
    6924           0 :                 goto exit;
    6925             :         }
    6926             : 
    6927             : exit:
    6928          49 :         if (rc != 0) {
    6929           1 :                 free_bdev_nvme_delete_ctx(ctx);
    6930           1 :         }
    6931             : 
    6932          49 :         return rc;
    6933             : }
    6934             : 
    6935             : #define DISCOVERY_INFOLOG(ctx, format, ...) \
    6936             :         SPDK_INFOLOG(bdev_nvme, "Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    6937             : 
    6938             : #define DISCOVERY_ERRLOG(ctx, format, ...) \
    6939             :         SPDK_ERRLOG("Discovery[%s:%s] " format, ctx->trid.traddr, ctx->trid.trsvcid, ##__VA_ARGS__);
    6940             : 
    6941             : struct discovery_entry_ctx {
    6942             :         char                                            name[128];
    6943             :         struct spdk_nvme_transport_id                   trid;
    6944             :         struct spdk_nvme_ctrlr_opts                     drv_opts;
    6945             :         struct spdk_nvmf_discovery_log_page_entry       entry;
    6946             :         TAILQ_ENTRY(discovery_entry_ctx)                tailq;
    6947             :         struct discovery_ctx                            *ctx;
    6948             : };
    6949             : 
    6950             : struct discovery_ctx {
    6951             :         char                                    *name;
    6952             :         spdk_bdev_nvme_start_discovery_fn       start_cb_fn;
    6953             :         spdk_bdev_nvme_stop_discovery_fn        stop_cb_fn;
    6954             :         void                                    *cb_ctx;
    6955             :         struct spdk_nvme_probe_ctx              *probe_ctx;
    6956             :         struct spdk_nvme_detach_ctx             *detach_ctx;
    6957             :         struct spdk_nvme_ctrlr                  *ctrlr;
    6958             :         struct spdk_nvme_transport_id           trid;
    6959             :         struct discovery_entry_ctx              *entry_ctx_in_use;
    6960             :         struct spdk_poller                      *poller;
    6961             :         struct spdk_nvme_ctrlr_opts             drv_opts;
    6962             :         struct spdk_bdev_nvme_ctrlr_opts        bdev_opts;
    6963             :         struct spdk_nvmf_discovery_log_page     *log_page;
    6964             :         TAILQ_ENTRY(discovery_ctx)              tailq;
    6965             :         TAILQ_HEAD(, discovery_entry_ctx)       nvm_entry_ctxs;
    6966             :         TAILQ_HEAD(, discovery_entry_ctx)       discovery_entry_ctxs;
    6967             :         int                                     rc;
    6968             :         bool                                    wait_for_attach;
    6969             :         uint64_t                                timeout_ticks;
    6970             :         /* Denotes that the discovery service is being started. We're waiting
    6971             :          * for the initial connection to the discovery controller to be
    6972             :          * established and attach discovered NVM ctrlrs.
    6973             :          */
    6974             :         bool                                    initializing;
    6975             :         /* Denotes if a discovery is currently in progress for this context.
    6976             :          * That includes connecting to newly discovered subsystems.  Used to
    6977             :          * ensure we do not start a new discovery until an existing one is
    6978             :          * complete.
    6979             :          */
    6980             :         bool                                    in_progress;
    6981             : 
    6982             :         /* Denotes if another discovery is needed after the one in progress
    6983             :          * completes.  Set when we receive an AER completion while a discovery
    6984             :          * is already in progress.
    6985             :          */
    6986             :         bool                                    pending;
    6987             : 
    6988             :         /* Signal to the discovery context poller that it should stop the
    6989             :          * discovery service, including detaching from the current discovery
    6990             :          * controller.
    6991             :          */
    6992             :         bool                                    stop;
    6993             : 
    6994             :         struct spdk_thread                      *calling_thread;
    6995             :         uint32_t                                index;
    6996             :         uint32_t                                attach_in_progress;
    6997             :         char                                    *hostnqn;
    6998             : 
    6999             :         /* Denotes if the discovery service was started by the mdns discovery.
    7000             :          */
    7001             :         bool                                    from_mdns_discovery_service;
    7002             : };
    7003             : 
    7004             : TAILQ_HEAD(discovery_ctxs, discovery_ctx);
    7005             : static struct discovery_ctxs g_discovery_ctxs = TAILQ_HEAD_INITIALIZER(g_discovery_ctxs);
    7006             : 
    7007             : static void get_discovery_log_page(struct discovery_ctx *ctx);
    7008             : 
    7009             : static void
    7010           0 : free_discovery_ctx(struct discovery_ctx *ctx)
    7011             : {
    7012           0 :         free(ctx->log_page);
    7013           0 :         free(ctx->hostnqn);
    7014           0 :         free(ctx->name);
    7015           0 :         free(ctx);
    7016           0 : }
    7017             : 
    7018             : static void
    7019           0 : discovery_complete(struct discovery_ctx *ctx)
    7020             : {
    7021           0 :         ctx->initializing = false;
    7022           0 :         ctx->in_progress = false;
    7023           0 :         if (ctx->pending) {
    7024           0 :                 ctx->pending = false;
    7025           0 :                 get_discovery_log_page(ctx);
    7026           0 :         }
    7027           0 : }
    7028             : 
    7029             : static void
    7030           0 : build_trid_from_log_page_entry(struct spdk_nvme_transport_id *trid,
    7031             :                                struct spdk_nvmf_discovery_log_page_entry *entry)
    7032             : {
    7033             :         char *space;
    7034             : 
    7035           0 :         trid->trtype = entry->trtype;
    7036           0 :         trid->adrfam = entry->adrfam;
    7037           0 :         memcpy(trid->traddr, entry->traddr, sizeof(entry->traddr));
    7038           0 :         memcpy(trid->trsvcid, entry->trsvcid, sizeof(entry->trsvcid));
    7039             :         /* Because the source buffer (entry->subnqn) is longer than trid->subnqn, and
    7040             :          * before call to this function trid->subnqn is zeroed out, we need
    7041             :          * to copy sizeof(trid->subnqn) minus one byte to make sure the last character
    7042             :          * remains 0. Then we can shorten the string (replace ' ' with 0) if required
    7043             :          */
    7044           0 :         memcpy(trid->subnqn, entry->subnqn, sizeof(trid->subnqn) - 1);
    7045             : 
    7046             :         /* We want the traddr, trsvcid and subnqn fields to be NULL-terminated.
    7047             :          * But the log page entries typically pad them with spaces, not zeroes.
    7048             :          * So add a NULL terminator to each of these fields at the appropriate
    7049             :          * location.
    7050             :          */
    7051           0 :         space = strchr(trid->traddr, ' ');
    7052           0 :         if (space) {
    7053           0 :                 *space = 0;
    7054           0 :         }
    7055           0 :         space = strchr(trid->trsvcid, ' ');
    7056           0 :         if (space) {
    7057           0 :                 *space = 0;
    7058           0 :         }
    7059           0 :         space = strchr(trid->subnqn, ' ');
    7060           0 :         if (space) {
    7061           0 :                 *space = 0;
    7062           0 :         }
    7063           0 : }
    7064             : 
    7065             : static void
    7066           0 : _stop_discovery(void *_ctx)
    7067             : {
    7068           0 :         struct discovery_ctx *ctx = _ctx;
    7069             : 
    7070           0 :         if (ctx->attach_in_progress > 0) {
    7071           0 :                 spdk_thread_send_msg(spdk_get_thread(), _stop_discovery, ctx);
    7072           0 :                 return;
    7073             :         }
    7074             : 
    7075           0 :         ctx->stop = true;
    7076             : 
    7077           0 :         while (!TAILQ_EMPTY(&ctx->nvm_entry_ctxs)) {
    7078             :                 struct discovery_entry_ctx *entry_ctx;
    7079           0 :                 struct nvme_path_id path = {};
    7080             : 
    7081           0 :                 entry_ctx = TAILQ_FIRST(&ctx->nvm_entry_ctxs);
    7082           0 :                 path.trid = entry_ctx->trid;
    7083           0 :                 bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    7084           0 :                 TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7085           0 :                 free(entry_ctx);
    7086             :         }
    7087             : 
    7088           0 :         while (!TAILQ_EMPTY(&ctx->discovery_entry_ctxs)) {
    7089             :                 struct discovery_entry_ctx *entry_ctx;
    7090             : 
    7091           0 :                 entry_ctx = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    7092           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    7093           0 :                 free(entry_ctx);
    7094             :         }
    7095             : 
    7096           0 :         free(ctx->entry_ctx_in_use);
    7097           0 :         ctx->entry_ctx_in_use = NULL;
    7098           0 : }
    7099             : 
    7100             : static void
    7101           0 : stop_discovery(struct discovery_ctx *ctx, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    7102             : {
    7103           0 :         ctx->stop_cb_fn = cb_fn;
    7104           0 :         ctx->cb_ctx = cb_ctx;
    7105             : 
    7106           0 :         if (ctx->attach_in_progress > 0) {
    7107           0 :                 DISCOVERY_INFOLOG(ctx, "stopping discovery with attach_in_progress: %"PRIu32"\n",
    7108             :                                   ctx->attach_in_progress);
    7109           0 :         }
    7110             : 
    7111           0 :         _stop_discovery(ctx);
    7112           0 : }
    7113             : 
    7114             : static void
    7115           2 : remove_discovery_entry(struct nvme_ctrlr *nvme_ctrlr)
    7116             : {
    7117             :         struct discovery_ctx *d_ctx;
    7118             :         struct nvme_path_id *path_id;
    7119           2 :         struct spdk_nvme_transport_id trid = {};
    7120             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7121             : 
    7122           2 :         path_id = TAILQ_FIRST(&nvme_ctrlr->trids);
    7123             : 
    7124           2 :         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    7125           0 :                 TAILQ_FOREACH_SAFE(entry_ctx, &d_ctx->nvm_entry_ctxs, tailq, tmp) {
    7126           0 :                         build_trid_from_log_page_entry(&trid, &entry_ctx->entry);
    7127           0 :                         if (spdk_nvme_transport_id_compare(&trid, &path_id->trid) != 0) {
    7128           0 :                                 continue;
    7129             :                         }
    7130             : 
    7131           0 :                         TAILQ_REMOVE(&d_ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7132           0 :                         free(entry_ctx);
    7133           0 :                         DISCOVERY_INFOLOG(d_ctx, "Remove discovery entry: %s:%s:%s\n",
    7134             :                                           trid.subnqn, trid.traddr, trid.trsvcid);
    7135             : 
    7136             :                         /* Fail discovery ctrlr to force reattach attempt */
    7137           0 :                         spdk_nvme_ctrlr_fail(d_ctx->ctrlr);
    7138           0 :                 }
    7139           0 :         }
    7140           2 : }
    7141             : 
    7142             : static void
    7143           0 : discovery_remove_controllers(struct discovery_ctx *ctx)
    7144             : {
    7145           0 :         struct spdk_nvmf_discovery_log_page *log_page = ctx->log_page;
    7146             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7147             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    7148           0 :         struct spdk_nvme_transport_id old_trid = {};
    7149             :         uint64_t numrec, i;
    7150             :         bool found;
    7151             : 
    7152           0 :         numrec = from_le64(&log_page->numrec);
    7153           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->nvm_entry_ctxs, tailq, tmp) {
    7154           0 :                 found = false;
    7155           0 :                 old_entry = &entry_ctx->entry;
    7156           0 :                 build_trid_from_log_page_entry(&old_trid, old_entry);
    7157           0 :                 for (i = 0; i < numrec; i++) {
    7158           0 :                         new_entry = &log_page->entries[i];
    7159           0 :                         if (!memcmp(old_entry, new_entry, sizeof(*old_entry))) {
    7160           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s found again\n",
    7161             :                                                   old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    7162           0 :                                 found = true;
    7163           0 :                                 break;
    7164             :                         }
    7165           0 :                 }
    7166           0 :                 if (!found) {
    7167           0 :                         struct nvme_path_id path = {};
    7168             : 
    7169           0 :                         DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s not found\n",
    7170             :                                           old_trid.subnqn, old_trid.traddr, old_trid.trsvcid);
    7171             : 
    7172           0 :                         path.trid = entry_ctx->trid;
    7173           0 :                         bdev_nvme_delete(entry_ctx->name, &path, NULL, NULL);
    7174           0 :                         TAILQ_REMOVE(&ctx->nvm_entry_ctxs, entry_ctx, tailq);
    7175           0 :                         free(entry_ctx);
    7176           0 :                 }
    7177           0 :         }
    7178           0 :         free(log_page);
    7179           0 :         ctx->log_page = NULL;
    7180           0 :         discovery_complete(ctx);
    7181           0 : }
    7182             : 
    7183             : static void
    7184           0 : complete_discovery_start(struct discovery_ctx *ctx, int status)
    7185             : {
    7186           0 :         ctx->timeout_ticks = 0;
    7187           0 :         ctx->rc = status;
    7188           0 :         if (ctx->start_cb_fn) {
    7189           0 :                 ctx->start_cb_fn(ctx->cb_ctx, status);
    7190           0 :                 ctx->start_cb_fn = NULL;
    7191           0 :                 ctx->cb_ctx = NULL;
    7192           0 :         }
    7193           0 : }
    7194             : 
    7195             : static void
    7196           0 : discovery_attach_controller_done(void *cb_ctx, size_t bdev_count, int rc)
    7197             : {
    7198           0 :         struct discovery_entry_ctx *entry_ctx = cb_ctx;
    7199           0 :         struct discovery_ctx *ctx = entry_ctx->ctx;
    7200             : 
    7201           0 :         DISCOVERY_INFOLOG(ctx, "attach %s done\n", entry_ctx->name);
    7202           0 :         ctx->attach_in_progress--;
    7203           0 :         if (ctx->attach_in_progress == 0) {
    7204           0 :                 complete_discovery_start(ctx, ctx->rc);
    7205           0 :                 if (ctx->initializing && ctx->rc != 0) {
    7206           0 :                         DISCOVERY_ERRLOG(ctx, "stopping discovery due to errors: %d\n", ctx->rc);
    7207           0 :                         stop_discovery(ctx, NULL, ctx->cb_ctx);
    7208           0 :                 } else {
    7209           0 :                         discovery_remove_controllers(ctx);
    7210             :                 }
    7211           0 :         }
    7212           0 : }
    7213             : 
    7214             : static struct discovery_entry_ctx *
    7215           0 : create_discovery_entry_ctx(struct discovery_ctx *ctx, struct spdk_nvme_transport_id *trid)
    7216             : {
    7217             :         struct discovery_entry_ctx *new_ctx;
    7218             : 
    7219           0 :         new_ctx = calloc(1, sizeof(*new_ctx));
    7220           0 :         if (new_ctx == NULL) {
    7221           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7222           0 :                 return NULL;
    7223             :         }
    7224             : 
    7225           0 :         new_ctx->ctx = ctx;
    7226           0 :         memcpy(&new_ctx->trid, trid, sizeof(*trid));
    7227           0 :         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    7228           0 :         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    7229           0 :         return new_ctx;
    7230           0 : }
    7231             : 
    7232             : static void
    7233           0 : discovery_log_page_cb(void *cb_arg, int rc, const struct spdk_nvme_cpl *cpl,
    7234             :                       struct spdk_nvmf_discovery_log_page *log_page)
    7235             : {
    7236           0 :         struct discovery_ctx *ctx = cb_arg;
    7237             :         struct discovery_entry_ctx *entry_ctx, *tmp;
    7238             :         struct spdk_nvmf_discovery_log_page_entry *new_entry, *old_entry;
    7239             :         uint64_t numrec, i;
    7240             :         bool found;
    7241             : 
    7242           0 :         if (rc || spdk_nvme_cpl_is_error(cpl)) {
    7243           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    7244           0 :                 return;
    7245             :         }
    7246             : 
    7247           0 :         ctx->log_page = log_page;
    7248           0 :         assert(ctx->attach_in_progress == 0);
    7249           0 :         numrec = from_le64(&log_page->numrec);
    7250           0 :         TAILQ_FOREACH_SAFE(entry_ctx, &ctx->discovery_entry_ctxs, tailq, tmp) {
    7251           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, entry_ctx, tailq);
    7252           0 :                 free(entry_ctx);
    7253           0 :         }
    7254           0 :         for (i = 0; i < numrec; i++) {
    7255           0 :                 found = false;
    7256           0 :                 new_entry = &log_page->entries[i];
    7257           0 :                 if (new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY_CURRENT ||
    7258           0 :                     new_entry->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY) {
    7259             :                         struct discovery_entry_ctx *new_ctx;
    7260           0 :                         struct spdk_nvme_transport_id trid = {};
    7261             : 
    7262           0 :                         build_trid_from_log_page_entry(&trid, new_entry);
    7263           0 :                         new_ctx = create_discovery_entry_ctx(ctx, &trid);
    7264           0 :                         if (new_ctx == NULL) {
    7265           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7266           0 :                                 break;
    7267             :                         }
    7268             : 
    7269           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, new_ctx, tailq);
    7270           0 :                         continue;
    7271             :                 }
    7272           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->nvm_entry_ctxs, tailq) {
    7273           0 :                         old_entry = &entry_ctx->entry;
    7274           0 :                         if (!memcmp(new_entry, old_entry, sizeof(*new_entry))) {
    7275           0 :                                 found = true;
    7276           0 :                                 break;
    7277             :                         }
    7278           0 :                 }
    7279           0 :                 if (!found) {
    7280           0 :                         struct discovery_entry_ctx *subnqn_ctx = NULL, *new_ctx;
    7281             :                         struct discovery_ctx *d_ctx;
    7282             : 
    7283           0 :                         TAILQ_FOREACH(d_ctx, &g_discovery_ctxs, tailq) {
    7284           0 :                                 TAILQ_FOREACH(subnqn_ctx, &d_ctx->nvm_entry_ctxs, tailq) {
    7285           0 :                                         if (!memcmp(subnqn_ctx->entry.subnqn, new_entry->subnqn,
    7286             :                                                     sizeof(new_entry->subnqn))) {
    7287           0 :                                                 break;
    7288             :                                         }
    7289           0 :                                 }
    7290           0 :                                 if (subnqn_ctx) {
    7291           0 :                                         break;
    7292             :                                 }
    7293           0 :                         }
    7294             : 
    7295           0 :                         new_ctx = calloc(1, sizeof(*new_ctx));
    7296           0 :                         if (new_ctx == NULL) {
    7297           0 :                                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7298           0 :                                 break;
    7299             :                         }
    7300             : 
    7301           0 :                         new_ctx->ctx = ctx;
    7302           0 :                         memcpy(&new_ctx->entry, new_entry, sizeof(*new_entry));
    7303           0 :                         build_trid_from_log_page_entry(&new_ctx->trid, new_entry);
    7304           0 :                         if (subnqn_ctx) {
    7305           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s", subnqn_ctx->name);
    7306           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new path for %s\n",
    7307             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    7308             :                                                   new_ctx->name);
    7309           0 :                         } else {
    7310           0 :                                 snprintf(new_ctx->name, sizeof(new_ctx->name), "%s%d", ctx->name, ctx->index++);
    7311           0 :                                 DISCOVERY_INFOLOG(ctx, "NVM %s:%s:%s new subsystem %s\n",
    7312             :                                                   new_ctx->trid.subnqn, new_ctx->trid.traddr, new_ctx->trid.trsvcid,
    7313             :                                                   new_ctx->name);
    7314             :                         }
    7315           0 :                         spdk_nvme_ctrlr_get_default_ctrlr_opts(&new_ctx->drv_opts, sizeof(new_ctx->drv_opts));
    7316           0 :                         snprintf(new_ctx->drv_opts.hostnqn, sizeof(new_ctx->drv_opts.hostnqn), "%s", ctx->hostnqn);
    7317           0 :                         rc = spdk_bdev_nvme_create(&new_ctx->trid, new_ctx->name, NULL, 0,
    7318           0 :                                                    discovery_attach_controller_done, new_ctx,
    7319           0 :                                                    &new_ctx->drv_opts, &ctx->bdev_opts);
    7320           0 :                         if (rc == 0) {
    7321           0 :                                 TAILQ_INSERT_TAIL(&ctx->nvm_entry_ctxs, new_ctx, tailq);
    7322           0 :                                 ctx->attach_in_progress++;
    7323           0 :                         } else {
    7324           0 :                                 DISCOVERY_ERRLOG(ctx, "spdk_bdev_nvme_create failed (%s)\n", spdk_strerror(-rc));
    7325             :                         }
    7326           0 :                 }
    7327           0 :         }
    7328             : 
    7329           0 :         if (ctx->attach_in_progress == 0) {
    7330           0 :                 discovery_remove_controllers(ctx);
    7331           0 :         }
    7332           0 : }
    7333             : 
    7334             : static void
    7335           0 : get_discovery_log_page(struct discovery_ctx *ctx)
    7336             : {
    7337             :         int rc;
    7338             : 
    7339           0 :         assert(ctx->in_progress == false);
    7340           0 :         ctx->in_progress = true;
    7341           0 :         rc = spdk_nvme_ctrlr_get_discovery_log_page(ctx->ctrlr, discovery_log_page_cb, ctx);
    7342           0 :         if (rc != 0) {
    7343           0 :                 DISCOVERY_ERRLOG(ctx, "could not get discovery log page\n");
    7344           0 :         }
    7345           0 :         DISCOVERY_INFOLOG(ctx, "sent discovery log page command\n");
    7346           0 : }
    7347             : 
    7348             : static void
    7349           0 : discovery_aer_cb(void *arg, const struct spdk_nvme_cpl *cpl)
    7350             : {
    7351           0 :         struct discovery_ctx *ctx = arg;
    7352           0 :         uint32_t log_page_id = (cpl->cdw0 & 0xFF0000) >> 16;
    7353             : 
    7354           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    7355           0 :                 DISCOVERY_ERRLOG(ctx, "aer failed\n");
    7356           0 :                 return;
    7357             :         }
    7358             : 
    7359           0 :         if (log_page_id != SPDK_NVME_LOG_DISCOVERY) {
    7360           0 :                 DISCOVERY_ERRLOG(ctx, "unexpected log page 0x%x\n", log_page_id);
    7361           0 :                 return;
    7362             :         }
    7363             : 
    7364           0 :         DISCOVERY_INFOLOG(ctx, "got aer\n");
    7365           0 :         if (ctx->in_progress) {
    7366           0 :                 ctx->pending = true;
    7367           0 :                 return;
    7368             :         }
    7369             : 
    7370           0 :         get_discovery_log_page(ctx);
    7371           0 : }
    7372             : 
    7373             : static void
    7374           0 : discovery_attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
    7375             :                     struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
    7376             : {
    7377           0 :         struct spdk_nvme_ctrlr_opts *user_opts = cb_ctx;
    7378             :         struct discovery_ctx *ctx;
    7379             : 
    7380           0 :         ctx = SPDK_CONTAINEROF(user_opts, struct discovery_ctx, drv_opts);
    7381             : 
    7382           0 :         DISCOVERY_INFOLOG(ctx, "discovery ctrlr attached\n");
    7383           0 :         ctx->probe_ctx = NULL;
    7384           0 :         ctx->ctrlr = ctrlr;
    7385             : 
    7386           0 :         if (ctx->rc != 0) {
    7387           0 :                 DISCOVERY_ERRLOG(ctx, "encountered error while attaching discovery ctrlr: %d\n",
    7388             :                                  ctx->rc);
    7389           0 :                 return;
    7390             :         }
    7391             : 
    7392           0 :         spdk_nvme_ctrlr_register_aer_callback(ctx->ctrlr, discovery_aer_cb, ctx);
    7393           0 : }
    7394             : 
    7395             : static int
    7396           0 : discovery_poller(void *arg)
    7397             : {
    7398           0 :         struct discovery_ctx *ctx = arg;
    7399             :         struct spdk_nvme_transport_id *trid;
    7400             :         int rc;
    7401             : 
    7402           0 :         if (ctx->detach_ctx) {
    7403           0 :                 rc = spdk_nvme_detach_poll_async(ctx->detach_ctx);
    7404           0 :                 if (rc != -EAGAIN) {
    7405           0 :                         ctx->detach_ctx = NULL;
    7406           0 :                         ctx->ctrlr = NULL;
    7407           0 :                 }
    7408           0 :         } else if (ctx->stop) {
    7409           0 :                 if (ctx->ctrlr != NULL) {
    7410           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7411           0 :                         if (rc == 0) {
    7412           0 :                                 return SPDK_POLLER_BUSY;
    7413             :                         }
    7414           0 :                         DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7415           0 :                 }
    7416           0 :                 spdk_poller_unregister(&ctx->poller);
    7417           0 :                 TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7418           0 :                 assert(ctx->start_cb_fn == NULL);
    7419           0 :                 if (ctx->stop_cb_fn != NULL) {
    7420           0 :                         ctx->stop_cb_fn(ctx->cb_ctx);
    7421           0 :                 }
    7422           0 :                 free_discovery_ctx(ctx);
    7423           0 :         } else if (ctx->probe_ctx == NULL && ctx->ctrlr == NULL) {
    7424           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7425           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7426           0 :                         assert(ctx->initializing);
    7427           0 :                         spdk_poller_unregister(&ctx->poller);
    7428           0 :                         TAILQ_REMOVE(&g_discovery_ctxs, ctx, tailq);
    7429           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7430           0 :                         stop_discovery(ctx, NULL, NULL);
    7431           0 :                         free_discovery_ctx(ctx);
    7432           0 :                         return SPDK_POLLER_BUSY;
    7433             :                 }
    7434             : 
    7435           0 :                 assert(ctx->entry_ctx_in_use == NULL);
    7436           0 :                 ctx->entry_ctx_in_use = TAILQ_FIRST(&ctx->discovery_entry_ctxs);
    7437           0 :                 TAILQ_REMOVE(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7438           0 :                 trid = &ctx->entry_ctx_in_use->trid;
    7439             : 
    7440             :                 /* All controllers must be configured explicitely either for multipath or failover.
    7441             :                  * While discovery use multipath mode, we need to set this in bdev options as well.
    7442             :                  */
    7443           0 :                 ctx->bdev_opts.multipath = true;
    7444             : 
    7445           0 :                 ctx->probe_ctx = spdk_nvme_connect_async(trid, &ctx->drv_opts, discovery_attach_cb);
    7446           0 :                 if (ctx->probe_ctx) {
    7447           0 :                         spdk_poller_unregister(&ctx->poller);
    7448           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000);
    7449           0 :                 } else {
    7450           0 :                         DISCOVERY_ERRLOG(ctx, "could not start discovery connect\n");
    7451           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7452           0 :                         ctx->entry_ctx_in_use = NULL;
    7453             :                 }
    7454           0 :         } else if (ctx->probe_ctx) {
    7455           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7456           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching discovery ctrlr\n");
    7457           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7458           0 :                         return SPDK_POLLER_BUSY;
    7459             :                 }
    7460             : 
    7461           0 :                 rc = spdk_nvme_probe_poll_async(ctx->probe_ctx);
    7462           0 :                 if (rc != -EAGAIN) {
    7463           0 :                         if (ctx->rc != 0) {
    7464           0 :                                 assert(ctx->initializing);
    7465           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7466           0 :                         } else {
    7467           0 :                                 assert(rc == 0);
    7468           0 :                                 DISCOVERY_INFOLOG(ctx, "discovery ctrlr connected\n");
    7469           0 :                                 ctx->rc = rc;
    7470           0 :                                 get_discovery_log_page(ctx);
    7471             :                         }
    7472           0 :                 }
    7473           0 :         } else {
    7474           0 :                 if (ctx->timeout_ticks != 0 && ctx->timeout_ticks < spdk_get_ticks()) {
    7475           0 :                         DISCOVERY_ERRLOG(ctx, "timed out while attaching NVM ctrlrs\n");
    7476           0 :                         complete_discovery_start(ctx, -ETIMEDOUT);
    7477             :                         /* We need to wait until all NVM ctrlrs are attached before we stop the
    7478             :                          * discovery service to make sure we don't detach a ctrlr that is still
    7479             :                          * being attached.
    7480             :                          */
    7481           0 :                         if (ctx->attach_in_progress == 0) {
    7482           0 :                                 stop_discovery(ctx, NULL, ctx->cb_ctx);
    7483           0 :                                 return SPDK_POLLER_BUSY;
    7484             :                         }
    7485           0 :                 }
    7486             : 
    7487           0 :                 rc = spdk_nvme_ctrlr_process_admin_completions(ctx->ctrlr);
    7488           0 :                 if (rc < 0) {
    7489           0 :                         spdk_poller_unregister(&ctx->poller);
    7490           0 :                         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7491           0 :                         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, ctx->entry_ctx_in_use, tailq);
    7492           0 :                         ctx->entry_ctx_in_use = NULL;
    7493             : 
    7494           0 :                         rc = spdk_nvme_detach_async(ctx->ctrlr, &ctx->detach_ctx);
    7495           0 :                         if (rc != 0) {
    7496           0 :                                 DISCOVERY_ERRLOG(ctx, "could not detach discovery ctrlr\n");
    7497           0 :                                 ctx->ctrlr = NULL;
    7498           0 :                         }
    7499           0 :                 }
    7500             :         }
    7501             : 
    7502           0 :         return SPDK_POLLER_BUSY;
    7503           0 : }
    7504             : 
    7505             : static void
    7506           0 : start_discovery_poller(void *arg)
    7507             : {
    7508           0 :         struct discovery_ctx *ctx = arg;
    7509             : 
    7510           0 :         TAILQ_INSERT_TAIL(&g_discovery_ctxs, ctx, tailq);
    7511           0 :         ctx->poller = SPDK_POLLER_REGISTER(discovery_poller, ctx, 1000 * 1000);
    7512           0 : }
    7513             : 
    7514             : int
    7515           0 : bdev_nvme_start_discovery(struct spdk_nvme_transport_id *trid,
    7516             :                           const char *base_name,
    7517             :                           struct spdk_nvme_ctrlr_opts *drv_opts,
    7518             :                           struct spdk_bdev_nvme_ctrlr_opts *bdev_opts,
    7519             :                           uint64_t attach_timeout,
    7520             :                           bool from_mdns,
    7521             :                           spdk_bdev_nvme_start_discovery_fn cb_fn, void *cb_ctx)
    7522             : {
    7523             :         struct discovery_ctx *ctx;
    7524             :         struct discovery_entry_ctx *discovery_entry_ctx;
    7525             : 
    7526           0 :         snprintf(trid->subnqn, sizeof(trid->subnqn), "%s", SPDK_NVMF_DISCOVERY_NQN);
    7527           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7528           0 :                 if (strcmp(ctx->name, base_name) == 0) {
    7529           0 :                         return -EEXIST;
    7530             :                 }
    7531             : 
    7532           0 :                 if (ctx->entry_ctx_in_use != NULL) {
    7533           0 :                         if (!spdk_nvme_transport_id_compare(trid, &ctx->entry_ctx_in_use->trid)) {
    7534           0 :                                 return -EEXIST;
    7535             :                         }
    7536           0 :                 }
    7537             : 
    7538           0 :                 TAILQ_FOREACH(discovery_entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    7539           0 :                         if (!spdk_nvme_transport_id_compare(trid, &discovery_entry_ctx->trid)) {
    7540           0 :                                 return -EEXIST;
    7541             :                         }
    7542           0 :                 }
    7543           0 :         }
    7544             : 
    7545           0 :         ctx = calloc(1, sizeof(*ctx));
    7546           0 :         if (ctx == NULL) {
    7547           0 :                 return -ENOMEM;
    7548             :         }
    7549             : 
    7550           0 :         ctx->name = strdup(base_name);
    7551           0 :         if (ctx->name == NULL) {
    7552           0 :                 free_discovery_ctx(ctx);
    7553           0 :                 return -ENOMEM;
    7554             :         }
    7555           0 :         memcpy(&ctx->drv_opts, drv_opts, sizeof(*drv_opts));
    7556           0 :         memcpy(&ctx->bdev_opts, bdev_opts, sizeof(*bdev_opts));
    7557           0 :         ctx->from_mdns_discovery_service = from_mdns;
    7558           0 :         ctx->bdev_opts.from_discovery_service = true;
    7559           0 :         ctx->calling_thread = spdk_get_thread();
    7560           0 :         ctx->start_cb_fn = cb_fn;
    7561           0 :         ctx->cb_ctx = cb_ctx;
    7562           0 :         ctx->initializing = true;
    7563           0 :         if (ctx->start_cb_fn) {
    7564             :                 /* We can use this when dumping json to denote if this RPC parameter
    7565             :                  * was specified or not.
    7566             :                  */
    7567           0 :                 ctx->wait_for_attach = true;
    7568           0 :         }
    7569           0 :         if (attach_timeout != 0) {
    7570           0 :                 ctx->timeout_ticks = spdk_get_ticks() + attach_timeout *
    7571           0 :                                      spdk_get_ticks_hz() / 1000ull;
    7572           0 :         }
    7573           0 :         TAILQ_INIT(&ctx->nvm_entry_ctxs);
    7574           0 :         TAILQ_INIT(&ctx->discovery_entry_ctxs);
    7575           0 :         memcpy(&ctx->trid, trid, sizeof(*trid));
    7576             :         /* Even if user did not specify hostnqn, we can still strdup("\0"); */
    7577           0 :         ctx->hostnqn = strdup(ctx->drv_opts.hostnqn);
    7578           0 :         if (ctx->hostnqn == NULL) {
    7579           0 :                 free_discovery_ctx(ctx);
    7580           0 :                 return -ENOMEM;
    7581             :         }
    7582           0 :         discovery_entry_ctx = create_discovery_entry_ctx(ctx, trid);
    7583           0 :         if (discovery_entry_ctx == NULL) {
    7584           0 :                 DISCOVERY_ERRLOG(ctx, "could not allocate new entry_ctx\n");
    7585           0 :                 free_discovery_ctx(ctx);
    7586           0 :                 return -ENOMEM;
    7587             :         }
    7588             : 
    7589           0 :         TAILQ_INSERT_TAIL(&ctx->discovery_entry_ctxs, discovery_entry_ctx, tailq);
    7590           0 :         spdk_thread_send_msg(g_bdev_nvme_init_thread, start_discovery_poller, ctx);
    7591           0 :         return 0;
    7592           0 : }
    7593             : 
    7594             : int
    7595           0 : bdev_nvme_stop_discovery(const char *name, spdk_bdev_nvme_stop_discovery_fn cb_fn, void *cb_ctx)
    7596             : {
    7597             :         struct discovery_ctx *ctx;
    7598             : 
    7599           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7600           0 :                 if (strcmp(name, ctx->name) == 0) {
    7601           0 :                         if (ctx->stop) {
    7602           0 :                                 return -EALREADY;
    7603             :                         }
    7604             :                         /* If we're still starting the discovery service and ->rc is non-zero, we're
    7605             :                          * going to stop it as soon as we can
    7606             :                          */
    7607           0 :                         if (ctx->initializing && ctx->rc != 0) {
    7608           0 :                                 return -EALREADY;
    7609             :                         }
    7610           0 :                         stop_discovery(ctx, cb_fn, cb_ctx);
    7611           0 :                         return 0;
    7612             :                 }
    7613           0 :         }
    7614             : 
    7615           0 :         return -ENOENT;
    7616           0 : }
    7617             : 
    7618             : static int
    7619           1 : bdev_nvme_library_init(void)
    7620             : {
    7621           1 :         g_bdev_nvme_init_thread = spdk_get_thread();
    7622             : 
    7623           1 :         spdk_io_device_register(&g_nvme_bdev_ctrlrs, bdev_nvme_create_poll_group_cb,
    7624             :                                 bdev_nvme_destroy_poll_group_cb,
    7625             :                                 sizeof(struct nvme_poll_group),  "nvme_poll_groups");
    7626             : 
    7627           1 :         return 0;
    7628             : }
    7629             : 
    7630             : static void
    7631           1 : bdev_nvme_fini_destruct_ctrlrs(void)
    7632             : {
    7633             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    7634             :         struct nvme_ctrlr *nvme_ctrlr;
    7635             : 
    7636           1 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    7637           1 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    7638           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    7639           0 :                         pthread_mutex_lock(&nvme_ctrlr->mutex);
    7640           0 :                         if (nvme_ctrlr->destruct) {
    7641             :                                 /* This controller's destruction was already started
    7642             :                                  * before the application started shutting down
    7643             :                                  */
    7644           0 :                                 pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7645           0 :                                 continue;
    7646             :                         }
    7647           0 :                         nvme_ctrlr->destruct = true;
    7648           0 :                         pthread_mutex_unlock(&nvme_ctrlr->mutex);
    7649             : 
    7650           0 :                         spdk_thread_send_msg(nvme_ctrlr->thread, _nvme_ctrlr_destruct,
    7651           0 :                                              nvme_ctrlr);
    7652           0 :                 }
    7653           0 :         }
    7654             : 
    7655           1 :         g_bdev_nvme_module_finish = true;
    7656           1 :         if (TAILQ_EMPTY(&g_nvme_bdev_ctrlrs)) {
    7657           1 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7658           1 :                 spdk_io_device_unregister(&g_nvme_bdev_ctrlrs, NULL);
    7659           1 :                 spdk_bdev_module_fini_done();
    7660           1 :                 return;
    7661             :         }
    7662             : 
    7663           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    7664           1 : }
    7665             : 
    7666             : static void
    7667           0 : check_discovery_fini(void *arg)
    7668             : {
    7669           0 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7670           0 :                 bdev_nvme_fini_destruct_ctrlrs();
    7671           0 :         }
    7672           0 : }
    7673             : 
    7674             : static void
    7675           1 : bdev_nvme_library_fini(void)
    7676             : {
    7677             :         struct nvme_probe_skip_entry *entry, *entry_tmp;
    7678             :         struct discovery_ctx *ctx;
    7679             : 
    7680           1 :         spdk_poller_unregister(&g_hotplug_poller);
    7681           1 :         free(g_hotplug_probe_ctx);
    7682           1 :         g_hotplug_probe_ctx = NULL;
    7683             : 
    7684           1 :         TAILQ_FOREACH_SAFE(entry, &g_skipped_nvme_ctrlrs, tailq, entry_tmp) {
    7685           0 :                 TAILQ_REMOVE(&g_skipped_nvme_ctrlrs, entry, tailq);
    7686           0 :                 free(entry);
    7687           0 :         }
    7688             : 
    7689           1 :         assert(spdk_get_thread() == g_bdev_nvme_init_thread);
    7690           1 :         if (TAILQ_EMPTY(&g_discovery_ctxs)) {
    7691           1 :                 bdev_nvme_fini_destruct_ctrlrs();
    7692           1 :         } else {
    7693           0 :                 TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    7694           0 :                         stop_discovery(ctx, check_discovery_fini, NULL);
    7695           0 :                 }
    7696             :         }
    7697           1 : }
    7698             : 
    7699             : static void
    7700           0 : bdev_nvme_verify_pi_error(struct nvme_bdev_io *bio)
    7701             : {
    7702           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7703           0 :         struct spdk_bdev *bdev = bdev_io->bdev;
    7704             :         struct spdk_dif_ctx dif_ctx;
    7705           0 :         struct spdk_dif_error err_blk = {};
    7706             :         int rc;
    7707             :         struct spdk_dif_ctx_init_ext_opts dif_opts;
    7708             : 
    7709           0 :         dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
    7710           0 :         dif_opts.dif_pi_format = bdev->dif_pi_format;
    7711           0 :         rc = spdk_dif_ctx_init(&dif_ctx,
    7712           0 :                                bdev->blocklen, bdev->md_len, bdev->md_interleave,
    7713           0 :                                bdev->dif_is_head_of_md, bdev->dif_type,
    7714           0 :                                bdev_io->u.bdev.dif_check_flags,
    7715           0 :                                bdev_io->u.bdev.offset_blocks, 0, 0, 0, 0, &dif_opts);
    7716           0 :         if (rc != 0) {
    7717           0 :                 SPDK_ERRLOG("Initialization of DIF context failed\n");
    7718           0 :                 return;
    7719             :         }
    7720             : 
    7721           0 :         if (bdev->md_interleave) {
    7722           0 :                 rc = spdk_dif_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7723           0 :                                      bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7724           0 :         } else {
    7725           0 :                 struct iovec md_iov = {
    7726           0 :                         .iov_base       = bdev_io->u.bdev.md_buf,
    7727           0 :                         .iov_len        = bdev_io->u.bdev.num_blocks * bdev->md_len,
    7728             :                 };
    7729             : 
    7730           0 :                 rc = spdk_dix_verify(bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt,
    7731           0 :                                      &md_iov, bdev_io->u.bdev.num_blocks, &dif_ctx, &err_blk);
    7732             :         }
    7733             : 
    7734           0 :         if (rc != 0) {
    7735           0 :                 SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
    7736             :                             err_blk.err_type, err_blk.err_offset);
    7737           0 :         } else {
    7738           0 :                 SPDK_ERRLOG("Hardware reported PI error but SPDK could not find any.\n");
    7739             :         }
    7740           0 : }
    7741             : 
    7742             : static void
    7743           0 : bdev_nvme_no_pi_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7744             : {
    7745           0 :         struct nvme_bdev_io *bio = ref;
    7746             : 
    7747           0 :         if (spdk_nvme_cpl_is_success(cpl)) {
    7748             :                 /* Run PI verification for read data buffer. */
    7749           0 :                 bdev_nvme_verify_pi_error(bio);
    7750           0 :         }
    7751             : 
    7752             :         /* Return original completion status */
    7753           0 :         bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7754           0 : }
    7755             : 
    7756             : static void
    7757           3 : bdev_nvme_readv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7758             : {
    7759           3 :         struct nvme_bdev_io *bio = ref;
    7760           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7761             :         int ret;
    7762             : 
    7763           3 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7764           0 :                 SPDK_ERRLOG("readv completed with PI error (sct=%d, sc=%d)\n",
    7765             :                             cpl->status.sct, cpl->status.sc);
    7766             : 
    7767             :                 /* Save completion status to use after verifying PI error. */
    7768           0 :                 bio->cpl = *cpl;
    7769             : 
    7770           0 :                 if (spdk_likely(nvme_io_path_is_available(bio->io_path))) {
    7771             :                         /* Read without PI checking to verify PI error. */
    7772           0 :                         ret = bdev_nvme_no_pi_readv(bio,
    7773           0 :                                                     bdev_io->u.bdev.iovs,
    7774           0 :                                                     bdev_io->u.bdev.iovcnt,
    7775           0 :                                                     bdev_io->u.bdev.md_buf,
    7776           0 :                                                     bdev_io->u.bdev.num_blocks,
    7777           0 :                                                     bdev_io->u.bdev.offset_blocks);
    7778           0 :                         if (ret == 0) {
    7779           0 :                                 return;
    7780             :                         }
    7781           0 :                 }
    7782           0 :         }
    7783             : 
    7784           3 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7785           3 : }
    7786             : 
    7787             : static void
    7788          25 : bdev_nvme_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7789             : {
    7790          25 :         struct nvme_bdev_io *bio = ref;
    7791             : 
    7792          25 :         if (spdk_unlikely(spdk_nvme_cpl_is_pi_error(cpl))) {
    7793           0 :                 SPDK_ERRLOG("writev completed with PI error (sct=%d, sc=%d)\n",
    7794             :                             cpl->status.sct, cpl->status.sc);
    7795             :                 /* Run PI verification for write data buffer if PI error is detected. */
    7796           0 :                 bdev_nvme_verify_pi_error(bio);
    7797           0 :         }
    7798             : 
    7799          25 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7800          25 : }
    7801             : 
    7802             : static void
    7803           0 : bdev_nvme_zone_appendv_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7804             : {
    7805           0 :         struct nvme_bdev_io *bio = ref;
    7806           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7807             : 
    7808             :         /* spdk_bdev_io_get_append_location() requires that the ALBA is stored in offset_blocks.
    7809             :          * Additionally, offset_blocks has to be set before calling bdev_nvme_verify_pi_error().
    7810             :          */
    7811           0 :         bdev_io->u.bdev.offset_blocks = *(uint64_t *)&cpl->cdw0;
    7812             : 
    7813           0 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7814           0 :                 SPDK_ERRLOG("zone append completed with PI error (sct=%d, sc=%d)\n",
    7815             :                             cpl->status.sct, cpl->status.sc);
    7816             :                 /* Run PI verification for zone append data buffer if PI error is detected. */
    7817           0 :                 bdev_nvme_verify_pi_error(bio);
    7818           0 :         }
    7819             : 
    7820           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7821           0 : }
    7822             : 
    7823             : static void
    7824           1 : bdev_nvme_comparev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7825             : {
    7826           1 :         struct nvme_bdev_io *bio = ref;
    7827             : 
    7828           1 :         if (spdk_nvme_cpl_is_pi_error(cpl)) {
    7829           0 :                 SPDK_ERRLOG("comparev completed with PI error (sct=%d, sc=%d)\n",
    7830             :                             cpl->status.sct, cpl->status.sc);
    7831             :                 /* Run PI verification for compare data buffer if PI error is detected. */
    7832           0 :                 bdev_nvme_verify_pi_error(bio);
    7833           0 :         }
    7834             : 
    7835           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7836           1 : }
    7837             : 
    7838             : static void
    7839           4 : bdev_nvme_comparev_and_writev_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7840             : {
    7841           4 :         struct nvme_bdev_io *bio = ref;
    7842             : 
    7843             :         /* Compare operation completion */
    7844           4 :         if (!bio->first_fused_completed) {
    7845             :                 /* Save compare result for write callback */
    7846           2 :                 bio->cpl = *cpl;
    7847           2 :                 bio->first_fused_completed = true;
    7848           2 :                 return;
    7849             :         }
    7850             : 
    7851             :         /* Write operation completion */
    7852           2 :         if (spdk_nvme_cpl_is_error(&bio->cpl)) {
    7853             :                 /* If bio->cpl is already an error, it means the compare operation failed.  In that case,
    7854             :                  * complete the IO with the compare operation's status.
    7855             :                  */
    7856           1 :                 if (!spdk_nvme_cpl_is_error(cpl)) {
    7857           1 :                         SPDK_ERRLOG("Unexpected write success after compare failure.\n");
    7858           1 :                 }
    7859             : 
    7860           1 :                 bdev_nvme_io_complete_nvme_status(bio, &bio->cpl);
    7861           1 :         } else {
    7862           1 :                 bdev_nvme_io_complete_nvme_status(bio, cpl);
    7863             :         }
    7864           4 : }
    7865             : 
    7866             : static void
    7867           1 : bdev_nvme_queued_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7868             : {
    7869           1 :         struct nvme_bdev_io *bio = ref;
    7870             : 
    7871           1 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7872           1 : }
    7873             : 
    7874             : static int
    7875           0 : fill_zone_from_report(struct spdk_bdev_zone_info *info, struct spdk_nvme_zns_zone_desc *desc)
    7876             : {
    7877           0 :         switch (desc->zt) {
    7878             :         case SPDK_NVME_ZONE_TYPE_SEQWR:
    7879           0 :                 info->type = SPDK_BDEV_ZONE_TYPE_SEQWR;
    7880           0 :                 break;
    7881             :         default:
    7882           0 :                 SPDK_ERRLOG("Invalid zone type: %#x in zone report\n", desc->zt);
    7883           0 :                 return -EIO;
    7884             :         }
    7885             : 
    7886           0 :         switch (desc->zs) {
    7887             :         case SPDK_NVME_ZONE_STATE_EMPTY:
    7888           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EMPTY;
    7889           0 :                 break;
    7890             :         case SPDK_NVME_ZONE_STATE_IOPEN:
    7891           0 :                 info->state = SPDK_BDEV_ZONE_STATE_IMP_OPEN;
    7892           0 :                 break;
    7893             :         case SPDK_NVME_ZONE_STATE_EOPEN:
    7894           0 :                 info->state = SPDK_BDEV_ZONE_STATE_EXP_OPEN;
    7895           0 :                 break;
    7896             :         case SPDK_NVME_ZONE_STATE_CLOSED:
    7897           0 :                 info->state = SPDK_BDEV_ZONE_STATE_CLOSED;
    7898           0 :                 break;
    7899             :         case SPDK_NVME_ZONE_STATE_RONLY:
    7900           0 :                 info->state = SPDK_BDEV_ZONE_STATE_READ_ONLY;
    7901           0 :                 break;
    7902             :         case SPDK_NVME_ZONE_STATE_FULL:
    7903           0 :                 info->state = SPDK_BDEV_ZONE_STATE_FULL;
    7904           0 :                 break;
    7905             :         case SPDK_NVME_ZONE_STATE_OFFLINE:
    7906           0 :                 info->state = SPDK_BDEV_ZONE_STATE_OFFLINE;
    7907           0 :                 break;
    7908             :         default:
    7909           0 :                 SPDK_ERRLOG("Invalid zone state: %#x in zone report\n", desc->zs);
    7910           0 :                 return -EIO;
    7911             :         }
    7912             : 
    7913           0 :         info->zone_id = desc->zslba;
    7914           0 :         info->write_pointer = desc->wp;
    7915           0 :         info->capacity = desc->zcap;
    7916             : 
    7917           0 :         return 0;
    7918           0 : }
    7919             : 
    7920             : static void
    7921           0 : bdev_nvme_get_zone_info_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7922             : {
    7923           0 :         struct nvme_bdev_io *bio = ref;
    7924           0 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    7925           0 :         uint64_t zone_id = bdev_io->u.zone_mgmt.zone_id;
    7926           0 :         uint32_t zones_to_copy = bdev_io->u.zone_mgmt.num_zones;
    7927           0 :         struct spdk_bdev_zone_info *info = bdev_io->u.zone_mgmt.buf;
    7928             :         uint64_t max_zones_per_buf, i;
    7929             :         uint32_t zone_report_bufsize;
    7930             :         struct spdk_nvme_ns *ns;
    7931             :         struct spdk_nvme_qpair *qpair;
    7932             :         int ret;
    7933             : 
    7934           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
    7935           0 :                 goto out_complete_io_nvme_cpl;
    7936             :         }
    7937             : 
    7938           0 :         if (spdk_unlikely(!nvme_io_path_is_available(bio->io_path))) {
    7939           0 :                 ret = -ENXIO;
    7940           0 :                 goto out_complete_io_ret;
    7941             :         }
    7942             : 
    7943           0 :         ns = bio->io_path->nvme_ns->ns;
    7944           0 :         qpair = bio->io_path->qpair->qpair;
    7945             : 
    7946           0 :         zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    7947           0 :         max_zones_per_buf = (zone_report_bufsize - sizeof(*bio->zone_report_buf)) /
    7948             :                             sizeof(bio->zone_report_buf->descs[0]);
    7949             : 
    7950           0 :         if (bio->zone_report_buf->nr_zones > max_zones_per_buf) {
    7951           0 :                 ret = -EINVAL;
    7952           0 :                 goto out_complete_io_ret;
    7953             :         }
    7954             : 
    7955           0 :         if (!bio->zone_report_buf->nr_zones) {
    7956           0 :                 ret = -EINVAL;
    7957           0 :                 goto out_complete_io_ret;
    7958             :         }
    7959             : 
    7960           0 :         for (i = 0; i < bio->zone_report_buf->nr_zones && bio->handled_zones < zones_to_copy; i++) {
    7961           0 :                 ret = fill_zone_from_report(&info[bio->handled_zones],
    7962           0 :                                             &bio->zone_report_buf->descs[i]);
    7963           0 :                 if (ret) {
    7964           0 :                         goto out_complete_io_ret;
    7965             :                 }
    7966           0 :                 bio->handled_zones++;
    7967           0 :         }
    7968             : 
    7969           0 :         if (bio->handled_zones < zones_to_copy) {
    7970           0 :                 uint64_t zone_size_lba = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    7971           0 :                 uint64_t slba = zone_id + (zone_size_lba * bio->handled_zones);
    7972             : 
    7973           0 :                 memset(bio->zone_report_buf, 0, zone_report_bufsize);
    7974           0 :                 ret = spdk_nvme_zns_report_zones(ns, qpair,
    7975           0 :                                                  bio->zone_report_buf, zone_report_bufsize,
    7976           0 :                                                  slba, SPDK_NVME_ZRA_LIST_ALL, true,
    7977           0 :                                                  bdev_nvme_get_zone_info_done, bio);
    7978           0 :                 if (!ret) {
    7979           0 :                         return;
    7980             :                 } else {
    7981           0 :                         goto out_complete_io_ret;
    7982             :                 }
    7983             :         }
    7984             : 
    7985             : out_complete_io_nvme_cpl:
    7986           0 :         free(bio->zone_report_buf);
    7987           0 :         bio->zone_report_buf = NULL;
    7988           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    7989           0 :         return;
    7990             : 
    7991             : out_complete_io_ret:
    7992           0 :         free(bio->zone_report_buf);
    7993           0 :         bio->zone_report_buf = NULL;
    7994           0 :         bdev_nvme_io_complete(bio, ret);
    7995           0 : }
    7996             : 
    7997             : static void
    7998           0 : bdev_nvme_zone_management_done(void *ref, const struct spdk_nvme_cpl *cpl)
    7999             : {
    8000           0 :         struct nvme_bdev_io *bio = ref;
    8001             : 
    8002           0 :         bdev_nvme_io_complete_nvme_status(bio, cpl);
    8003           0 : }
    8004             : 
    8005             : static void
    8006           4 : bdev_nvme_admin_passthru_complete_nvme_status(void *ctx)
    8007             : {
    8008           4 :         struct nvme_bdev_io *bio = ctx;
    8009           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8010           4 :         const struct spdk_nvme_cpl *cpl = &bio->cpl;
    8011             : 
    8012           4 :         assert(bdev_nvme_io_type_is_admin(bdev_io->type));
    8013             : 
    8014           4 :         __bdev_nvme_io_complete(bdev_io, 0, cpl);
    8015           4 : }
    8016             : 
    8017             : static void
    8018           3 : bdev_nvme_abort_complete(void *ctx)
    8019             : {
    8020           3 :         struct nvme_bdev_io *bio = ctx;
    8021           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8022             : 
    8023           3 :         if (spdk_nvme_cpl_is_abort_success(&bio->cpl)) {
    8024           3 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS, NULL);
    8025           3 :         } else {
    8026           0 :                 __bdev_nvme_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED, NULL);
    8027             :         }
    8028           3 : }
    8029             : 
    8030             : static void
    8031           3 : bdev_nvme_abort_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8032             : {
    8033           3 :         struct nvme_bdev_io *bio = ref;
    8034           3 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8035             : 
    8036           3 :         bio->cpl = *cpl;
    8037           3 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io), bdev_nvme_abort_complete, bio);
    8038           3 : }
    8039             : 
    8040             : static void
    8041           4 : bdev_nvme_admin_passthru_done(void *ref, const struct spdk_nvme_cpl *cpl)
    8042             : {
    8043           4 :         struct nvme_bdev_io *bio = ref;
    8044           4 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8045             : 
    8046           4 :         bio->cpl = *cpl;
    8047           8 :         spdk_thread_send_msg(spdk_bdev_io_get_thread(bdev_io),
    8048           4 :                              bdev_nvme_admin_passthru_complete_nvme_status, bio);
    8049           4 : }
    8050             : 
    8051             : static void
    8052           0 : bdev_nvme_queued_reset_sgl(void *ref, uint32_t sgl_offset)
    8053             : {
    8054           0 :         struct nvme_bdev_io *bio = ref;
    8055             :         struct iovec *iov;
    8056             : 
    8057           0 :         bio->iov_offset = sgl_offset;
    8058           0 :         for (bio->iovpos = 0; bio->iovpos < bio->iovcnt; bio->iovpos++) {
    8059           0 :                 iov = &bio->iovs[bio->iovpos];
    8060           0 :                 if (bio->iov_offset < iov->iov_len) {
    8061           0 :                         break;
    8062             :                 }
    8063             : 
    8064           0 :                 bio->iov_offset -= iov->iov_len;
    8065           0 :         }
    8066           0 : }
    8067             : 
    8068             : static int
    8069           0 : bdev_nvme_queued_next_sge(void *ref, void **address, uint32_t *length)
    8070             : {
    8071           0 :         struct nvme_bdev_io *bio = ref;
    8072             :         struct iovec *iov;
    8073             : 
    8074           0 :         assert(bio->iovpos < bio->iovcnt);
    8075             : 
    8076           0 :         iov = &bio->iovs[bio->iovpos];
    8077             : 
    8078           0 :         *address = iov->iov_base;
    8079           0 :         *length = iov->iov_len;
    8080             : 
    8081           0 :         if (bio->iov_offset) {
    8082           0 :                 assert(bio->iov_offset <= iov->iov_len);
    8083           0 :                 *address += bio->iov_offset;
    8084           0 :                 *length -= bio->iov_offset;
    8085           0 :         }
    8086             : 
    8087           0 :         bio->iov_offset += *length;
    8088           0 :         if (bio->iov_offset == iov->iov_len) {
    8089           0 :                 bio->iovpos++;
    8090           0 :                 bio->iov_offset = 0;
    8091           0 :         }
    8092             : 
    8093           0 :         return 0;
    8094             : }
    8095             : 
    8096             : static void
    8097           0 : bdev_nvme_queued_reset_fused_sgl(void *ref, uint32_t sgl_offset)
    8098             : {
    8099           0 :         struct nvme_bdev_io *bio = ref;
    8100             :         struct iovec *iov;
    8101             : 
    8102           0 :         bio->fused_iov_offset = sgl_offset;
    8103           0 :         for (bio->fused_iovpos = 0; bio->fused_iovpos < bio->fused_iovcnt; bio->fused_iovpos++) {
    8104           0 :                 iov = &bio->fused_iovs[bio->fused_iovpos];
    8105           0 :                 if (bio->fused_iov_offset < iov->iov_len) {
    8106           0 :                         break;
    8107             :                 }
    8108             : 
    8109           0 :                 bio->fused_iov_offset -= iov->iov_len;
    8110           0 :         }
    8111           0 : }
    8112             : 
    8113             : static int
    8114           0 : bdev_nvme_queued_next_fused_sge(void *ref, void **address, uint32_t *length)
    8115             : {
    8116           0 :         struct nvme_bdev_io *bio = ref;
    8117             :         struct iovec *iov;
    8118             : 
    8119           0 :         assert(bio->fused_iovpos < bio->fused_iovcnt);
    8120             : 
    8121           0 :         iov = &bio->fused_iovs[bio->fused_iovpos];
    8122             : 
    8123           0 :         *address = iov->iov_base;
    8124           0 :         *length = iov->iov_len;
    8125             : 
    8126           0 :         if (bio->fused_iov_offset) {
    8127           0 :                 assert(bio->fused_iov_offset <= iov->iov_len);
    8128           0 :                 *address += bio->fused_iov_offset;
    8129           0 :                 *length -= bio->fused_iov_offset;
    8130           0 :         }
    8131             : 
    8132           0 :         bio->fused_iov_offset += *length;
    8133           0 :         if (bio->fused_iov_offset == iov->iov_len) {
    8134           0 :                 bio->fused_iovpos++;
    8135           0 :                 bio->fused_iov_offset = 0;
    8136           0 :         }
    8137             : 
    8138           0 :         return 0;
    8139             : }
    8140             : 
    8141             : static int
    8142           0 : bdev_nvme_no_pi_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8143             :                       void *md, uint64_t lba_count, uint64_t lba)
    8144             : {
    8145             :         int rc;
    8146             : 
    8147           0 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 " without PI check\n",
    8148             :                       lba_count, lba);
    8149             : 
    8150           0 :         bio->iovs = iov;
    8151           0 :         bio->iovcnt = iovcnt;
    8152           0 :         bio->iovpos = 0;
    8153           0 :         bio->iov_offset = 0;
    8154             : 
    8155           0 :         rc = spdk_nvme_ns_cmd_readv_with_md(bio->io_path->nvme_ns->ns,
    8156           0 :                                             bio->io_path->qpair->qpair,
    8157           0 :                                             lba, lba_count,
    8158           0 :                                             bdev_nvme_no_pi_readv_done, bio, 0,
    8159             :                                             bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8160           0 :                                             md, 0, 0);
    8161             : 
    8162           0 :         if (rc != 0 && rc != -ENOMEM) {
    8163           0 :                 SPDK_ERRLOG("no_pi_readv failed: rc = %d\n", rc);
    8164           0 :         }
    8165           0 :         return rc;
    8166             : }
    8167             : 
    8168             : static int
    8169           3 : bdev_nvme_readv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8170             :                 void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    8171             :                 struct spdk_memory_domain *domain, void *domain_ctx,
    8172             :                 struct spdk_accel_sequence *seq)
    8173             : {
    8174           3 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8175           3 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8176             :         int rc;
    8177             : 
    8178           3 :         SPDK_DEBUGLOG(bdev_nvme, "read %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8179             :                       lba_count, lba);
    8180             : 
    8181           3 :         bio->iovs = iov;
    8182           3 :         bio->iovcnt = iovcnt;
    8183           3 :         bio->iovpos = 0;
    8184           3 :         bio->iov_offset = 0;
    8185             : 
    8186           3 :         if (domain != NULL || seq != NULL) {
    8187           1 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    8188           1 :                 bio->ext_opts.memory_domain = domain;
    8189           1 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    8190           1 :                 bio->ext_opts.io_flags = flags;
    8191           1 :                 bio->ext_opts.metadata = md;
    8192           1 :                 bio->ext_opts.accel_sequence = seq;
    8193             : 
    8194           1 :                 if (iovcnt == 1) {
    8195           2 :                         rc = spdk_nvme_ns_cmd_read_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_readv_done,
    8196           1 :                                                        bio, &bio->ext_opts);
    8197           1 :                 } else {
    8198           0 :                         rc = spdk_nvme_ns_cmd_readv_ext(ns, qpair, lba, lba_count,
    8199           0 :                                                         bdev_nvme_readv_done, bio,
    8200             :                                                         bdev_nvme_queued_reset_sgl,
    8201             :                                                         bdev_nvme_queued_next_sge,
    8202           0 :                                                         &bio->ext_opts);
    8203             :                 }
    8204           3 :         } else if (iovcnt == 1) {
    8205           4 :                 rc = spdk_nvme_ns_cmd_read_with_md(ns, qpair, iov[0].iov_base,
    8206           2 :                                                    md, lba, lba_count, bdev_nvme_readv_done,
    8207           2 :                                                    bio, flags, 0, 0);
    8208           2 :         } else {
    8209           0 :                 rc = spdk_nvme_ns_cmd_readv_with_md(ns, qpair, lba, lba_count,
    8210           0 :                                                     bdev_nvme_readv_done, bio, flags,
    8211             :                                                     bdev_nvme_queued_reset_sgl,
    8212           0 :                                                     bdev_nvme_queued_next_sge, md, 0, 0);
    8213             :         }
    8214             : 
    8215           3 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    8216           0 :                 SPDK_ERRLOG("readv failed: rc = %d\n", rc);
    8217           0 :         }
    8218           3 :         return rc;
    8219             : }
    8220             : 
    8221             : static int
    8222          25 : bdev_nvme_writev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8223             :                  void *md, uint64_t lba_count, uint64_t lba, uint32_t flags,
    8224             :                  struct spdk_memory_domain *domain, void *domain_ctx,
    8225             :                  struct spdk_accel_sequence *seq,
    8226             :                  union spdk_bdev_nvme_cdw12 cdw12, union spdk_bdev_nvme_cdw13 cdw13)
    8227             : {
    8228          25 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8229          25 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8230             :         int rc;
    8231             : 
    8232          25 :         SPDK_DEBUGLOG(bdev_nvme, "write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8233             :                       lba_count, lba);
    8234             : 
    8235          25 :         bio->iovs = iov;
    8236          25 :         bio->iovcnt = iovcnt;
    8237          25 :         bio->iovpos = 0;
    8238          25 :         bio->iov_offset = 0;
    8239             : 
    8240          25 :         if (domain != NULL || seq != NULL) {
    8241           0 :                 bio->ext_opts.size = SPDK_SIZEOF(&bio->ext_opts, accel_sequence);
    8242           0 :                 bio->ext_opts.memory_domain = domain;
    8243           0 :                 bio->ext_opts.memory_domain_ctx = domain_ctx;
    8244           0 :                 bio->ext_opts.io_flags = flags | SPDK_NVME_IO_FLAGS_DIRECTIVE(cdw12.write.dtype);
    8245           0 :                 bio->ext_opts.cdw13 = cdw13.raw;
    8246           0 :                 bio->ext_opts.metadata = md;
    8247           0 :                 bio->ext_opts.accel_sequence = seq;
    8248             : 
    8249           0 :                 if (iovcnt == 1) {
    8250           0 :                         rc = spdk_nvme_ns_cmd_write_ext(ns, qpair, iov[0].iov_base, lba, lba_count, bdev_nvme_writev_done,
    8251           0 :                                                         bio, &bio->ext_opts);
    8252           0 :                 } else {
    8253           0 :                         rc = spdk_nvme_ns_cmd_writev_ext(ns, qpair, lba, lba_count,
    8254           0 :                                                          bdev_nvme_writev_done, bio,
    8255             :                                                          bdev_nvme_queued_reset_sgl,
    8256             :                                                          bdev_nvme_queued_next_sge,
    8257           0 :                                                          &bio->ext_opts);
    8258             :                 }
    8259          25 :         } else if (iovcnt == 1) {
    8260          50 :                 rc = spdk_nvme_ns_cmd_write_with_md(ns, qpair, iov[0].iov_base,
    8261          25 :                                                     md, lba, lba_count, bdev_nvme_writev_done,
    8262          25 :                                                     bio, flags, 0, 0);
    8263          25 :         } else {
    8264           0 :                 rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    8265           0 :                                                      bdev_nvme_writev_done, bio, flags,
    8266             :                                                      bdev_nvme_queued_reset_sgl,
    8267           0 :                                                      bdev_nvme_queued_next_sge, md, 0, 0);
    8268             :         }
    8269             : 
    8270          25 :         if (spdk_unlikely(rc != 0 && rc != -ENOMEM)) {
    8271           0 :                 SPDK_ERRLOG("writev failed: rc = %d\n", rc);
    8272           0 :         }
    8273          25 :         return rc;
    8274             : }
    8275             : 
    8276             : static int
    8277           0 : bdev_nvme_zone_appendv(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8278             :                        void *md, uint64_t lba_count, uint64_t zslba,
    8279             :                        uint32_t flags)
    8280             : {
    8281           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8282           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8283             :         int rc;
    8284             : 
    8285           0 :         SPDK_DEBUGLOG(bdev_nvme, "zone append %" PRIu64 " blocks to zone start lba %#" PRIx64 "\n",
    8286             :                       lba_count, zslba);
    8287             : 
    8288           0 :         bio->iovs = iov;
    8289           0 :         bio->iovcnt = iovcnt;
    8290           0 :         bio->iovpos = 0;
    8291           0 :         bio->iov_offset = 0;
    8292             : 
    8293           0 :         if (iovcnt == 1) {
    8294           0 :                 rc = spdk_nvme_zns_zone_append_with_md(ns, qpair, iov[0].iov_base, md, zslba,
    8295           0 :                                                        lba_count,
    8296           0 :                                                        bdev_nvme_zone_appendv_done, bio,
    8297           0 :                                                        flags,
    8298             :                                                        0, 0);
    8299           0 :         } else {
    8300           0 :                 rc = spdk_nvme_zns_zone_appendv_with_md(ns, qpair, zslba, lba_count,
    8301           0 :                                                         bdev_nvme_zone_appendv_done, bio, flags,
    8302             :                                                         bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8303           0 :                                                         md, 0, 0);
    8304             :         }
    8305             : 
    8306           0 :         if (rc != 0 && rc != -ENOMEM) {
    8307           0 :                 SPDK_ERRLOG("zone append failed: rc = %d\n", rc);
    8308           0 :         }
    8309           0 :         return rc;
    8310             : }
    8311             : 
    8312             : static int
    8313           1 : bdev_nvme_comparev(struct nvme_bdev_io *bio, struct iovec *iov, int iovcnt,
    8314             :                    void *md, uint64_t lba_count, uint64_t lba,
    8315             :                    uint32_t flags)
    8316             : {
    8317             :         int rc;
    8318             : 
    8319           1 :         SPDK_DEBUGLOG(bdev_nvme, "compare %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8320             :                       lba_count, lba);
    8321             : 
    8322           1 :         bio->iovs = iov;
    8323           1 :         bio->iovcnt = iovcnt;
    8324           1 :         bio->iovpos = 0;
    8325           1 :         bio->iov_offset = 0;
    8326             : 
    8327           2 :         rc = spdk_nvme_ns_cmd_comparev_with_md(bio->io_path->nvme_ns->ns,
    8328           1 :                                                bio->io_path->qpair->qpair,
    8329           1 :                                                lba, lba_count,
    8330           1 :                                                bdev_nvme_comparev_done, bio, flags,
    8331             :                                                bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge,
    8332           1 :                                                md, 0, 0);
    8333             : 
    8334           1 :         if (rc != 0 && rc != -ENOMEM) {
    8335           0 :                 SPDK_ERRLOG("comparev failed: rc = %d\n", rc);
    8336           0 :         }
    8337           1 :         return rc;
    8338             : }
    8339             : 
    8340             : static int
    8341           2 : bdev_nvme_comparev_and_writev(struct nvme_bdev_io *bio, struct iovec *cmp_iov, int cmp_iovcnt,
    8342             :                               struct iovec *write_iov, int write_iovcnt,
    8343             :                               void *md, uint64_t lba_count, uint64_t lba, uint32_t flags)
    8344             : {
    8345           2 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8346           2 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8347           2 :         struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(bio);
    8348             :         int rc;
    8349             : 
    8350           2 :         SPDK_DEBUGLOG(bdev_nvme, "compare and write %" PRIu64 " blocks with offset %#" PRIx64 "\n",
    8351             :                       lba_count, lba);
    8352             : 
    8353           2 :         bio->iovs = cmp_iov;
    8354           2 :         bio->iovcnt = cmp_iovcnt;
    8355           2 :         bio->iovpos = 0;
    8356           2 :         bio->iov_offset = 0;
    8357           2 :         bio->fused_iovs = write_iov;
    8358           2 :         bio->fused_iovcnt = write_iovcnt;
    8359           2 :         bio->fused_iovpos = 0;
    8360           2 :         bio->fused_iov_offset = 0;
    8361             : 
    8362           2 :         if (bdev_io->num_retries == 0) {
    8363           2 :                 bio->first_fused_submitted = false;
    8364           2 :                 bio->first_fused_completed = false;
    8365           2 :         }
    8366             : 
    8367           2 :         if (!bio->first_fused_submitted) {
    8368           2 :                 flags |= SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    8369           2 :                 memset(&bio->cpl, 0, sizeof(bio->cpl));
    8370             : 
    8371           4 :                 rc = spdk_nvme_ns_cmd_comparev_with_md(ns, qpair, lba, lba_count,
    8372           2 :                                                        bdev_nvme_comparev_and_writev_done, bio, flags,
    8373           2 :                                                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge, md, 0, 0);
    8374           2 :                 if (rc == 0) {
    8375           2 :                         bio->first_fused_submitted = true;
    8376           2 :                         flags &= ~SPDK_NVME_IO_FLAGS_FUSE_FIRST;
    8377           2 :                 } else {
    8378           0 :                         if (rc != -ENOMEM) {
    8379           0 :                                 SPDK_ERRLOG("compare failed: rc = %d\n", rc);
    8380           0 :                         }
    8381           0 :                         return rc;
    8382             :                 }
    8383           2 :         }
    8384             : 
    8385           2 :         flags |= SPDK_NVME_IO_FLAGS_FUSE_SECOND;
    8386             : 
    8387           4 :         rc = spdk_nvme_ns_cmd_writev_with_md(ns, qpair, lba, lba_count,
    8388           2 :                                              bdev_nvme_comparev_and_writev_done, bio, flags,
    8389           2 :                                              bdev_nvme_queued_reset_fused_sgl, bdev_nvme_queued_next_fused_sge, md, 0, 0);
    8390           2 :         if (rc != 0 && rc != -ENOMEM) {
    8391           0 :                 SPDK_ERRLOG("write failed: rc = %d\n", rc);
    8392           0 :                 rc = 0;
    8393           0 :         }
    8394             : 
    8395           2 :         return rc;
    8396           2 : }
    8397             : 
    8398             : static int
    8399           1 : bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    8400             : {
    8401             :         struct spdk_nvme_dsm_range dsm_ranges[SPDK_NVME_DATASET_MANAGEMENT_MAX_RANGES];
    8402             :         struct spdk_nvme_dsm_range *range;
    8403             :         uint64_t offset, remaining;
    8404             :         uint64_t num_ranges_u64;
    8405             :         uint16_t num_ranges;
    8406             :         int rc;
    8407             : 
    8408           1 :         num_ranges_u64 = (num_blocks + SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS - 1) /
    8409             :                          SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8410           1 :         if (num_ranges_u64 > SPDK_COUNTOF(dsm_ranges)) {
    8411           0 :                 SPDK_ERRLOG("Unmap request for %" PRIu64 " blocks is too large\n", num_blocks);
    8412           0 :                 return -EINVAL;
    8413             :         }
    8414           1 :         num_ranges = (uint16_t)num_ranges_u64;
    8415             : 
    8416           1 :         offset = offset_blocks;
    8417           1 :         remaining = num_blocks;
    8418           1 :         range = &dsm_ranges[0];
    8419             : 
    8420             :         /* Fill max-size ranges until the remaining blocks fit into one range */
    8421           1 :         while (remaining > SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS) {
    8422           0 :                 range->attributes.raw = 0;
    8423           0 :                 range->length = SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8424           0 :                 range->starting_lba = offset;
    8425             : 
    8426           0 :                 offset += SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8427           0 :                 remaining -= SPDK_NVME_DATASET_MANAGEMENT_RANGE_MAX_BLOCKS;
    8428           0 :                 range++;
    8429             :         }
    8430             : 
    8431             :         /* Final range describes the remaining blocks */
    8432           1 :         range->attributes.raw = 0;
    8433           1 :         range->length = remaining;
    8434           1 :         range->starting_lba = offset;
    8435             : 
    8436           2 :         rc = spdk_nvme_ns_cmd_dataset_management(bio->io_path->nvme_ns->ns,
    8437           1 :                         bio->io_path->qpair->qpair,
    8438             :                         SPDK_NVME_DSM_ATTR_DEALLOCATE,
    8439           1 :                         dsm_ranges, num_ranges,
    8440           1 :                         bdev_nvme_queued_done, bio);
    8441             : 
    8442           1 :         return rc;
    8443           1 : }
    8444             : 
    8445             : static int
    8446           0 : bdev_nvme_write_zeroes(struct nvme_bdev_io *bio, uint64_t offset_blocks, uint64_t num_blocks)
    8447             : {
    8448           0 :         if (num_blocks > UINT16_MAX + 1) {
    8449           0 :                 SPDK_ERRLOG("NVMe write zeroes is limited to 16-bit block count\n");
    8450           0 :                 return -EINVAL;
    8451             :         }
    8452             : 
    8453           0 :         return spdk_nvme_ns_cmd_write_zeroes(bio->io_path->nvme_ns->ns,
    8454           0 :                                              bio->io_path->qpair->qpair,
    8455           0 :                                              offset_blocks, num_blocks,
    8456           0 :                                              bdev_nvme_queued_done, bio,
    8457             :                                              0);
    8458           0 : }
    8459             : 
    8460             : static int
    8461           0 : bdev_nvme_get_zone_info(struct nvme_bdev_io *bio, uint64_t zone_id, uint32_t num_zones,
    8462             :                         struct spdk_bdev_zone_info *info)
    8463             : {
    8464           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8465           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8466           0 :         uint32_t zone_report_bufsize = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8467           0 :         uint64_t zone_size = spdk_nvme_zns_ns_get_zone_size_sectors(ns);
    8468           0 :         uint64_t total_zones = spdk_nvme_zns_ns_get_num_zones(ns);
    8469             : 
    8470           0 :         if (zone_id % zone_size != 0) {
    8471           0 :                 return -EINVAL;
    8472             :         }
    8473             : 
    8474           0 :         if (num_zones > total_zones || !num_zones) {
    8475           0 :                 return -EINVAL;
    8476             :         }
    8477             : 
    8478           0 :         assert(!bio->zone_report_buf);
    8479           0 :         bio->zone_report_buf = calloc(1, zone_report_bufsize);
    8480           0 :         if (!bio->zone_report_buf) {
    8481           0 :                 return -ENOMEM;
    8482             :         }
    8483             : 
    8484           0 :         bio->handled_zones = 0;
    8485             : 
    8486           0 :         return spdk_nvme_zns_report_zones(ns, qpair, bio->zone_report_buf, zone_report_bufsize,
    8487           0 :                                           zone_id, SPDK_NVME_ZRA_LIST_ALL, true,
    8488           0 :                                           bdev_nvme_get_zone_info_done, bio);
    8489           0 : }
    8490             : 
    8491             : static int
    8492           0 : bdev_nvme_zone_management(struct nvme_bdev_io *bio, uint64_t zone_id,
    8493             :                           enum spdk_bdev_zone_action action)
    8494             : {
    8495           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8496           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8497             : 
    8498           0 :         switch (action) {
    8499             :         case SPDK_BDEV_ZONE_CLOSE:
    8500           0 :                 return spdk_nvme_zns_close_zone(ns, qpair, zone_id, false,
    8501           0 :                                                 bdev_nvme_zone_management_done, bio);
    8502             :         case SPDK_BDEV_ZONE_FINISH:
    8503           0 :                 return spdk_nvme_zns_finish_zone(ns, qpair, zone_id, false,
    8504           0 :                                                  bdev_nvme_zone_management_done, bio);
    8505             :         case SPDK_BDEV_ZONE_OPEN:
    8506           0 :                 return spdk_nvme_zns_open_zone(ns, qpair, zone_id, false,
    8507           0 :                                                bdev_nvme_zone_management_done, bio);
    8508             :         case SPDK_BDEV_ZONE_RESET:
    8509           0 :                 return spdk_nvme_zns_reset_zone(ns, qpair, zone_id, false,
    8510           0 :                                                 bdev_nvme_zone_management_done, bio);
    8511             :         case SPDK_BDEV_ZONE_OFFLINE:
    8512           0 :                 return spdk_nvme_zns_offline_zone(ns, qpair, zone_id, false,
    8513           0 :                                                   bdev_nvme_zone_management_done, bio);
    8514             :         default:
    8515           0 :                 return -EINVAL;
    8516             :         }
    8517           0 : }
    8518             : 
    8519             : static void
    8520           5 : bdev_nvme_admin_passthru(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8521             :                          struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes)
    8522             : {
    8523             :         struct nvme_io_path *io_path;
    8524             :         struct nvme_ctrlr *nvme_ctrlr;
    8525             :         uint32_t max_xfer_size;
    8526           5 :         int rc = -ENXIO;
    8527             : 
    8528             :         /* Choose the first ctrlr which is not failed. */
    8529           8 :         STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8530           7 :                 nvme_ctrlr = io_path->qpair->ctrlr;
    8531             : 
    8532             :                 /* We should skip any unavailable nvme_ctrlr rather than checking
    8533             :                  * if the return value of spdk_nvme_ctrlr_cmd_admin_raw() is -ENXIO.
    8534             :                  */
    8535           7 :                 if (!nvme_ctrlr_is_available(nvme_ctrlr)) {
    8536           3 :                         continue;
    8537             :                 }
    8538             : 
    8539           4 :                 max_xfer_size = spdk_nvme_ctrlr_get_max_xfer_size(nvme_ctrlr->ctrlr);
    8540             : 
    8541           4 :                 if (nbytes > max_xfer_size) {
    8542           0 :                         SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8543           0 :                         rc = -EINVAL;
    8544           0 :                         goto err;
    8545             :                 }
    8546             : 
    8547           8 :                 rc = spdk_nvme_ctrlr_cmd_admin_raw(nvme_ctrlr->ctrlr, cmd, buf, (uint32_t)nbytes,
    8548           4 :                                                    bdev_nvme_admin_passthru_done, bio);
    8549           4 :                 if (rc == 0) {
    8550           4 :                         return;
    8551             :                 }
    8552           1 :         }
    8553             : 
    8554             : err:
    8555           1 :         bdev_nvme_admin_complete(bio, rc);
    8556           5 : }
    8557             : 
    8558             : static int
    8559           0 : bdev_nvme_io_passthru(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8560             :                       void *buf, size_t nbytes)
    8561             : {
    8562           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8563           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8564           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8565           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8566             : 
    8567           0 :         if (nbytes > max_xfer_size) {
    8568           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8569           0 :                 return -EINVAL;
    8570             :         }
    8571             : 
    8572             :         /*
    8573             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8574             :          * so fill it out automatically.
    8575             :          */
    8576           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8577             : 
    8578           0 :         return spdk_nvme_ctrlr_cmd_io_raw(ctrlr, qpair, cmd, buf,
    8579           0 :                                           (uint32_t)nbytes, bdev_nvme_queued_done, bio);
    8580           0 : }
    8581             : 
    8582             : static int
    8583           0 : bdev_nvme_io_passthru_md(struct nvme_bdev_io *bio, struct spdk_nvme_cmd *cmd,
    8584             :                          void *buf, size_t nbytes, void *md_buf, size_t md_len)
    8585             : {
    8586           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8587           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8588           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8589           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8590           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8591             : 
    8592           0 :         if (nbytes > max_xfer_size) {
    8593           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8594           0 :                 return -EINVAL;
    8595             :         }
    8596             : 
    8597           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8598           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8599           0 :                 return -EINVAL;
    8600             :         }
    8601             : 
    8602             :         /*
    8603             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands require a nsid,
    8604             :          * so fill it out automatically.
    8605             :          */
    8606           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8607             : 
    8608           0 :         return spdk_nvme_ctrlr_cmd_io_raw_with_md(ctrlr, qpair, cmd, buf,
    8609           0 :                         (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio);
    8610           0 : }
    8611             : 
    8612             : static int
    8613           0 : bdev_nvme_iov_passthru_md(struct nvme_bdev_io *bio,
    8614             :                           struct spdk_nvme_cmd *cmd, struct iovec *iov, int iovcnt,
    8615             :                           size_t nbytes, void *md_buf, size_t md_len)
    8616             : {
    8617           0 :         struct spdk_nvme_ns *ns = bio->io_path->nvme_ns->ns;
    8618           0 :         struct spdk_nvme_qpair *qpair = bio->io_path->qpair->qpair;
    8619           0 :         size_t nr_sectors = nbytes / spdk_nvme_ns_get_extended_sector_size(ns);
    8620           0 :         uint32_t max_xfer_size = spdk_nvme_ns_get_max_io_xfer_size(ns);
    8621           0 :         struct spdk_nvme_ctrlr *ctrlr = spdk_nvme_ns_get_ctrlr(ns);
    8622             : 
    8623           0 :         bio->iovs = iov;
    8624           0 :         bio->iovcnt = iovcnt;
    8625           0 :         bio->iovpos = 0;
    8626           0 :         bio->iov_offset = 0;
    8627             : 
    8628           0 :         if (nbytes > max_xfer_size) {
    8629           0 :                 SPDK_ERRLOG("nbytes is greater than MDTS %" PRIu32 ".\n", max_xfer_size);
    8630           0 :                 return -EINVAL;
    8631             :         }
    8632             : 
    8633           0 :         if (md_len != nr_sectors * spdk_nvme_ns_get_md_size(ns)) {
    8634           0 :                 SPDK_ERRLOG("invalid meta data buffer size\n");
    8635           0 :                 return -EINVAL;
    8636             :         }
    8637             : 
    8638             :         /*
    8639             :          * Each NVMe bdev is a specific namespace, and all NVMe I/O commands
    8640             :          * require a nsid, so fill it out automatically.
    8641             :          */
    8642           0 :         cmd->nsid = spdk_nvme_ns_get_id(ns);
    8643             : 
    8644           0 :         return spdk_nvme_ctrlr_cmd_iov_raw_with_md(
    8645           0 :                        ctrlr, qpair, cmd, (uint32_t)nbytes, md_buf, bdev_nvme_queued_done, bio,
    8646             :                        bdev_nvme_queued_reset_sgl, bdev_nvme_queued_next_sge);
    8647           0 : }
    8648             : 
    8649             : static void
    8650           6 : bdev_nvme_abort(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio,
    8651             :                 struct nvme_bdev_io *bio_to_abort)
    8652             : {
    8653             :         struct nvme_io_path *io_path;
    8654           6 :         int rc = 0;
    8655             : 
    8656           6 :         rc = bdev_nvme_abort_retry_io(nbdev_ch, bio_to_abort);
    8657           6 :         if (rc == 0) {
    8658           1 :                 bdev_nvme_admin_complete(bio, 0);
    8659           1 :                 return;
    8660             :         }
    8661             : 
    8662           5 :         io_path = bio_to_abort->io_path;
    8663           5 :         if (io_path != NULL) {
    8664           6 :                 rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8665           3 :                                                    io_path->qpair->qpair,
    8666           3 :                                                    bio_to_abort,
    8667           3 :                                                    bdev_nvme_abort_done, bio);
    8668           3 :         } else {
    8669           3 :                 STAILQ_FOREACH(io_path, &nbdev_ch->io_path_list, stailq) {
    8670           4 :                         rc = spdk_nvme_ctrlr_cmd_abort_ext(io_path->qpair->ctrlr->ctrlr,
    8671             :                                                            NULL,
    8672           2 :                                                            bio_to_abort,
    8673           2 :                                                            bdev_nvme_abort_done, bio);
    8674             : 
    8675           2 :                         if (rc != -ENOENT) {
    8676           1 :                                 break;
    8677             :                         }
    8678           1 :                 }
    8679             :         }
    8680             : 
    8681           5 :         if (rc != 0) {
    8682             :                 /* If no command was found or there was any error, complete the abort
    8683             :                  * request with failure.
    8684             :                  */
    8685           2 :                 bdev_nvme_admin_complete(bio, rc);
    8686           2 :         }
    8687           6 : }
    8688             : 
    8689             : static int
    8690           0 : bdev_nvme_copy(struct nvme_bdev_io *bio, uint64_t dst_offset_blocks, uint64_t src_offset_blocks,
    8691             :                uint64_t num_blocks)
    8692             : {
    8693           0 :         struct spdk_nvme_scc_source_range range = {
    8694           0 :                 .slba = src_offset_blocks,
    8695           0 :                 .nlb = num_blocks - 1
    8696             :         };
    8697             : 
    8698           0 :         return spdk_nvme_ns_cmd_copy(bio->io_path->nvme_ns->ns,
    8699           0 :                                      bio->io_path->qpair->qpair,
    8700           0 :                                      &range, 1, dst_offset_blocks,
    8701           0 :                                      bdev_nvme_queued_done, bio);
    8702             : }
    8703             : 
    8704             : static void
    8705           0 : bdev_nvme_opts_config_json(struct spdk_json_write_ctx *w)
    8706             : {
    8707             :         const char *action;
    8708             :         uint32_t i;
    8709             : 
    8710           0 :         if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET) {
    8711           0 :                 action = "reset";
    8712           0 :         } else if (g_opts.action_on_timeout == SPDK_BDEV_NVME_TIMEOUT_ACTION_ABORT) {
    8713           0 :                 action = "abort";
    8714           0 :         } else {
    8715           0 :                 action = "none";
    8716             :         }
    8717             : 
    8718           0 :         spdk_json_write_object_begin(w);
    8719             : 
    8720           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_options");
    8721             : 
    8722           0 :         spdk_json_write_named_object_begin(w, "params");
    8723           0 :         spdk_json_write_named_string(w, "action_on_timeout", action);
    8724           0 :         spdk_json_write_named_uint64(w, "timeout_us", g_opts.timeout_us);
    8725           0 :         spdk_json_write_named_uint64(w, "timeout_admin_us", g_opts.timeout_admin_us);
    8726           0 :         spdk_json_write_named_uint32(w, "keep_alive_timeout_ms", g_opts.keep_alive_timeout_ms);
    8727           0 :         spdk_json_write_named_uint32(w, "arbitration_burst", g_opts.arbitration_burst);
    8728           0 :         spdk_json_write_named_uint32(w, "low_priority_weight", g_opts.low_priority_weight);
    8729           0 :         spdk_json_write_named_uint32(w, "medium_priority_weight", g_opts.medium_priority_weight);
    8730           0 :         spdk_json_write_named_uint32(w, "high_priority_weight", g_opts.high_priority_weight);
    8731           0 :         spdk_json_write_named_uint64(w, "nvme_adminq_poll_period_us", g_opts.nvme_adminq_poll_period_us);
    8732           0 :         spdk_json_write_named_uint64(w, "nvme_ioq_poll_period_us", g_opts.nvme_ioq_poll_period_us);
    8733           0 :         spdk_json_write_named_uint32(w, "io_queue_requests", g_opts.io_queue_requests);
    8734           0 :         spdk_json_write_named_bool(w, "delay_cmd_submit", g_opts.delay_cmd_submit);
    8735           0 :         spdk_json_write_named_uint32(w, "transport_retry_count", g_opts.transport_retry_count);
    8736           0 :         spdk_json_write_named_int32(w, "bdev_retry_count", g_opts.bdev_retry_count);
    8737           0 :         spdk_json_write_named_uint8(w, "transport_ack_timeout", g_opts.transport_ack_timeout);
    8738           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", g_opts.ctrlr_loss_timeout_sec);
    8739           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", g_opts.reconnect_delay_sec);
    8740           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec", g_opts.fast_io_fail_timeout_sec);
    8741           0 :         spdk_json_write_named_bool(w, "disable_auto_failback", g_opts.disable_auto_failback);
    8742           0 :         spdk_json_write_named_bool(w, "generate_uuids", g_opts.generate_uuids);
    8743           0 :         spdk_json_write_named_uint8(w, "transport_tos", g_opts.transport_tos);
    8744           0 :         spdk_json_write_named_bool(w, "nvme_error_stat", g_opts.nvme_error_stat);
    8745           0 :         spdk_json_write_named_uint32(w, "rdma_srq_size", g_opts.rdma_srq_size);
    8746           0 :         spdk_json_write_named_bool(w, "io_path_stat", g_opts.io_path_stat);
    8747           0 :         spdk_json_write_named_bool(w, "allow_accel_sequence", g_opts.allow_accel_sequence);
    8748           0 :         spdk_json_write_named_uint32(w, "rdma_max_cq_size", g_opts.rdma_max_cq_size);
    8749           0 :         spdk_json_write_named_uint16(w, "rdma_cm_event_timeout_ms", g_opts.rdma_cm_event_timeout_ms);
    8750           0 :         spdk_json_write_named_array_begin(w, "dhchap_digests");
    8751           0 :         for (i = 0; i < 32; ++i) {
    8752           0 :                 if (g_opts.dhchap_digests & SPDK_BIT(i)) {
    8753           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_digest_name(i));
    8754           0 :                 }
    8755           0 :         }
    8756           0 :         spdk_json_write_array_end(w);
    8757           0 :         spdk_json_write_named_array_begin(w, "dhchap_dhgroups");
    8758           0 :         for (i = 0; i < 32; ++i) {
    8759           0 :                 if (g_opts.dhchap_dhgroups & SPDK_BIT(i)) {
    8760           0 :                         spdk_json_write_string(w, spdk_nvme_dhchap_get_dhgroup_name(i));
    8761           0 :                 }
    8762           0 :         }
    8763             : 
    8764           0 :         spdk_json_write_array_end(w);
    8765           0 :         spdk_json_write_object_end(w);
    8766             : 
    8767           0 :         spdk_json_write_object_end(w);
    8768           0 : }
    8769             : 
    8770             : static void
    8771           0 : bdev_nvme_discovery_config_json(struct spdk_json_write_ctx *w, struct discovery_ctx *ctx)
    8772             : {
    8773             :         struct spdk_nvme_transport_id trid;
    8774             : 
    8775           0 :         spdk_json_write_object_begin(w);
    8776             : 
    8777           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_start_discovery");
    8778             : 
    8779           0 :         spdk_json_write_named_object_begin(w, "params");
    8780           0 :         spdk_json_write_named_string(w, "name", ctx->name);
    8781           0 :         spdk_json_write_named_string(w, "hostnqn", ctx->hostnqn);
    8782             : 
    8783           0 :         trid = ctx->trid;
    8784           0 :         memset(trid.subnqn, 0, sizeof(trid.subnqn));
    8785           0 :         nvme_bdev_dump_trid_json(&trid, w);
    8786             : 
    8787           0 :         spdk_json_write_named_bool(w, "wait_for_attach", ctx->wait_for_attach);
    8788           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", ctx->bdev_opts.ctrlr_loss_timeout_sec);
    8789           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", ctx->bdev_opts.reconnect_delay_sec);
    8790           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8791           0 :                                      ctx->bdev_opts.fast_io_fail_timeout_sec);
    8792           0 :         spdk_json_write_object_end(w);
    8793             : 
    8794           0 :         spdk_json_write_object_end(w);
    8795           0 : }
    8796             : 
    8797             : #ifdef SPDK_CONFIG_NVME_CUSE
    8798             : static void
    8799             : nvme_ctrlr_cuse_config_json(struct spdk_json_write_ctx *w,
    8800             :                             struct nvme_ctrlr *nvme_ctrlr)
    8801             : {
    8802             :         size_t cuse_name_size = 128;
    8803             :         char cuse_name[cuse_name_size];
    8804             : 
    8805             :         if (spdk_nvme_cuse_get_ctrlr_name(nvme_ctrlr->ctrlr,
    8806             :                                           cuse_name, &cuse_name_size) != 0) {
    8807             :                 return;
    8808             :         }
    8809             : 
    8810             :         spdk_json_write_object_begin(w);
    8811             : 
    8812             :         spdk_json_write_named_string(w, "method", "bdev_nvme_cuse_register");
    8813             : 
    8814             :         spdk_json_write_named_object_begin(w, "params");
    8815             :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8816             :         spdk_json_write_object_end(w);
    8817             : 
    8818             :         spdk_json_write_object_end(w);
    8819             : }
    8820             : #endif
    8821             : 
    8822             : static void
    8823           0 : nvme_ctrlr_config_json(struct spdk_json_write_ctx *w,
    8824             :                        struct nvme_ctrlr *nvme_ctrlr,
    8825             :                        struct nvme_path_id *path_id)
    8826             : {
    8827             :         struct spdk_nvme_transport_id   *trid;
    8828             :         const struct spdk_nvme_ctrlr_opts *opts;
    8829             : 
    8830           0 :         if (nvme_ctrlr->opts.from_discovery_service) {
    8831             :                 /* Do not emit an RPC for this - it will be implicitly
    8832             :                  * covered by a separate bdev_nvme_start_discovery or
    8833             :                  * bdev_nvme_start_mdns_discovery RPC.
    8834             :                  */
    8835           0 :                 return;
    8836             :         }
    8837             : 
    8838           0 :         trid = &path_id->trid;
    8839             : 
    8840           0 :         spdk_json_write_object_begin(w);
    8841             : 
    8842           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_attach_controller");
    8843             : 
    8844           0 :         spdk_json_write_named_object_begin(w, "params");
    8845           0 :         spdk_json_write_named_string(w, "name", nvme_ctrlr->nbdev_ctrlr->name);
    8846           0 :         nvme_bdev_dump_trid_json(trid, w);
    8847           0 :         spdk_json_write_named_bool(w, "prchk_reftag",
    8848           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_REFTAG) != 0);
    8849           0 :         spdk_json_write_named_bool(w, "prchk_guard",
    8850           0 :                                    (nvme_ctrlr->opts.prchk_flags & SPDK_NVME_IO_FLAGS_PRCHK_GUARD) != 0);
    8851           0 :         spdk_json_write_named_int32(w, "ctrlr_loss_timeout_sec", nvme_ctrlr->opts.ctrlr_loss_timeout_sec);
    8852           0 :         spdk_json_write_named_uint32(w, "reconnect_delay_sec", nvme_ctrlr->opts.reconnect_delay_sec);
    8853           0 :         spdk_json_write_named_uint32(w, "fast_io_fail_timeout_sec",
    8854           0 :                                      nvme_ctrlr->opts.fast_io_fail_timeout_sec);
    8855           0 :         if (nvme_ctrlr->psk != NULL) {
    8856           0 :                 spdk_json_write_named_string(w, "psk", spdk_key_get_name(nvme_ctrlr->psk));
    8857           0 :         }
    8858           0 :         if (nvme_ctrlr->dhchap_key != NULL) {
    8859           0 :                 spdk_json_write_named_string(w, "dhchap_key",
    8860           0 :                                              spdk_key_get_name(nvme_ctrlr->dhchap_key));
    8861           0 :         }
    8862           0 :         if (nvme_ctrlr->dhchap_ctrlr_key != NULL) {
    8863           0 :                 spdk_json_write_named_string(w, "dhchap_ctrlr_key",
    8864           0 :                                              spdk_key_get_name(nvme_ctrlr->dhchap_ctrlr_key));
    8865           0 :         }
    8866           0 :         opts = spdk_nvme_ctrlr_get_opts(nvme_ctrlr->ctrlr);
    8867           0 :         spdk_json_write_named_string(w, "hostnqn", opts->hostnqn);
    8868           0 :         spdk_json_write_named_bool(w, "hdgst", opts->header_digest);
    8869           0 :         spdk_json_write_named_bool(w, "ddgst", opts->data_digest);
    8870           0 :         if (opts->src_addr[0] != '\0') {
    8871           0 :                 spdk_json_write_named_string(w, "hostaddr", opts->src_addr);
    8872           0 :         }
    8873           0 :         if (opts->src_svcid[0] != '\0') {
    8874           0 :                 spdk_json_write_named_string(w, "hostsvcid", opts->src_svcid);
    8875           0 :         }
    8876             : 
    8877           0 :         if (nvme_ctrlr->opts.multipath) {
    8878           0 :                 spdk_json_write_named_string(w, "multipath", "multipath");
    8879           0 :         }
    8880           0 :         spdk_json_write_object_end(w);
    8881             : 
    8882           0 :         spdk_json_write_object_end(w);
    8883           0 : }
    8884             : 
    8885             : static void
    8886           0 : bdev_nvme_hotplug_config_json(struct spdk_json_write_ctx *w)
    8887             : {
    8888           0 :         spdk_json_write_object_begin(w);
    8889           0 :         spdk_json_write_named_string(w, "method", "bdev_nvme_set_hotplug");
    8890             : 
    8891           0 :         spdk_json_write_named_object_begin(w, "params");
    8892           0 :         spdk_json_write_named_uint64(w, "period_us", g_nvme_hotplug_poll_period_us);
    8893           0 :         spdk_json_write_named_bool(w, "enable", g_nvme_hotplug_enabled);
    8894           0 :         spdk_json_write_object_end(w);
    8895             : 
    8896           0 :         spdk_json_write_object_end(w);
    8897           0 : }
    8898             : 
    8899             : static int
    8900           0 : bdev_nvme_config_json(struct spdk_json_write_ctx *w)
    8901             : {
    8902             :         struct nvme_bdev_ctrlr  *nbdev_ctrlr;
    8903             :         struct nvme_ctrlr       *nvme_ctrlr;
    8904             :         struct discovery_ctx    *ctx;
    8905             :         struct nvme_path_id     *path_id;
    8906             : 
    8907           0 :         bdev_nvme_opts_config_json(w);
    8908             : 
    8909           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    8910             : 
    8911           0 :         TAILQ_FOREACH(nbdev_ctrlr, &g_nvme_bdev_ctrlrs, tailq) {
    8912           0 :                 TAILQ_FOREACH(nvme_ctrlr, &nbdev_ctrlr->ctrlrs, tailq) {
    8913           0 :                         path_id = nvme_ctrlr->active_path_id;
    8914           0 :                         assert(path_id == TAILQ_FIRST(&nvme_ctrlr->trids));
    8915           0 :                         nvme_ctrlr_config_json(w, nvme_ctrlr, path_id);
    8916             : 
    8917           0 :                         path_id = TAILQ_NEXT(path_id, link);
    8918           0 :                         while (path_id != NULL) {
    8919           0 :                                 nvme_ctrlr_config_json(w, nvme_ctrlr, path_id);
    8920           0 :                                 path_id = TAILQ_NEXT(path_id, link);
    8921             :                         }
    8922             : 
    8923             : #ifdef SPDK_CONFIG_NVME_CUSE
    8924             :                         nvme_ctrlr_cuse_config_json(w, nvme_ctrlr);
    8925             : #endif
    8926           0 :                 }
    8927           0 :         }
    8928             : 
    8929           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    8930           0 :                 if (!ctx->from_mdns_discovery_service) {
    8931           0 :                         bdev_nvme_discovery_config_json(w, ctx);
    8932           0 :                 }
    8933           0 :         }
    8934             : 
    8935           0 :         bdev_nvme_mdns_discovery_config_json(w);
    8936             : 
    8937             :         /* Dump as last parameter to give all NVMe bdevs chance to be constructed
    8938             :          * before enabling hotplug poller.
    8939             :          */
    8940           0 :         bdev_nvme_hotplug_config_json(w);
    8941             : 
    8942           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    8943           0 :         return 0;
    8944             : }
    8945             : 
    8946             : struct spdk_nvme_ctrlr *
    8947           1 : bdev_nvme_get_ctrlr(struct spdk_bdev *bdev)
    8948             : {
    8949             :         struct nvme_bdev *nbdev;
    8950             :         struct nvme_ns *nvme_ns;
    8951             : 
    8952           1 :         if (!bdev || bdev->module != &nvme_if) {
    8953           0 :                 return NULL;
    8954             :         }
    8955             : 
    8956           1 :         nbdev = SPDK_CONTAINEROF(bdev, struct nvme_bdev, disk);
    8957           1 :         nvme_ns = TAILQ_FIRST(&nbdev->nvme_ns_list);
    8958           1 :         assert(nvme_ns != NULL);
    8959             : 
    8960           1 :         return nvme_ns->ctrlr->ctrlr;
    8961           1 : }
    8962             : 
    8963             : static bool
    8964          12 : nvme_io_path_is_current(struct nvme_io_path *io_path)
    8965             : {
    8966             :         const struct nvme_bdev_channel *nbdev_ch;
    8967             :         bool current;
    8968             : 
    8969          12 :         if (!nvme_io_path_is_available(io_path)) {
    8970           4 :                 return false;
    8971             :         }
    8972             : 
    8973           8 :         nbdev_ch = io_path->nbdev_ch;
    8974           8 :         if (nbdev_ch == NULL) {
    8975           1 :                 current = false;
    8976           8 :         } else if (nbdev_ch->mp_policy == BDEV_NVME_MP_POLICY_ACTIVE_ACTIVE) {
    8977           3 :                 struct nvme_io_path *optimized_io_path = NULL;
    8978             : 
    8979           6 :                 STAILQ_FOREACH(optimized_io_path, &nbdev_ch->io_path_list, stailq) {
    8980           5 :                         if (optimized_io_path->nvme_ns->ana_state == SPDK_NVME_ANA_OPTIMIZED_STATE) {
    8981           2 :                                 break;
    8982             :                         }
    8983           3 :                 }
    8984             : 
    8985             :                 /* A non-optimized path is only current if there are no optimized paths. */
    8986           3 :                 current = (io_path->nvme_ns->ana_state == SPDK_NVME_ANA_OPTIMIZED_STATE) ||
    8987           2 :                           (optimized_io_path == NULL);
    8988           3 :         } else {
    8989           4 :                 if (nbdev_ch->current_io_path) {
    8990           1 :                         current = (io_path == nbdev_ch->current_io_path);
    8991           1 :                 } else {
    8992             :                         struct nvme_io_path *first_path;
    8993             : 
    8994             :                         /* We arrived here as there are no optimized paths for active-passive
    8995             :                          * mode. Check if this io_path is the first one available on the list.
    8996             :                          */
    8997           3 :                         current = false;
    8998           3 :                         STAILQ_FOREACH(first_path, &nbdev_ch->io_path_list, stailq) {
    8999           3 :                                 if (nvme_io_path_is_available(first_path)) {
    9000           3 :                                         current = (io_path == first_path);
    9001           3 :                                         break;
    9002             :                                 }
    9003           0 :                         }
    9004             :                 }
    9005             :         }
    9006             : 
    9007           8 :         return current;
    9008          12 : }
    9009             : 
    9010             : static struct nvme_ctrlr *
    9011           0 : bdev_nvme_next_ctrlr_unsafe(struct nvme_bdev_ctrlr *nbdev_ctrlr, struct nvme_ctrlr *prev)
    9012             : {
    9013             :         struct nvme_ctrlr *next;
    9014             : 
    9015             :         /* Must be called under g_bdev_nvme_mutex */
    9016           0 :         next = prev != NULL ? TAILQ_NEXT(prev, tailq) : TAILQ_FIRST(&nbdev_ctrlr->ctrlrs);
    9017           0 :         while (next != NULL) {
    9018             :                 /* ref can be 0 when the ctrlr was released, but hasn't been detached yet */
    9019           0 :                 pthread_mutex_lock(&next->mutex);
    9020           0 :                 if (next->ref > 0) {
    9021           0 :                         next->ref++;
    9022           0 :                         pthread_mutex_unlock(&next->mutex);
    9023           0 :                         return next;
    9024             :                 }
    9025             : 
    9026           0 :                 pthread_mutex_unlock(&next->mutex);
    9027           0 :                 next = TAILQ_NEXT(next, tailq);
    9028             :         }
    9029             : 
    9030           0 :         return NULL;
    9031           0 : }
    9032             : 
    9033             : struct bdev_nvme_set_keys_ctx {
    9034             :         struct nvme_ctrlr       *nctrlr;
    9035             :         struct spdk_key         *dhchap_key;
    9036             :         struct spdk_key         *dhchap_ctrlr_key;
    9037             :         struct spdk_thread      *thread;
    9038             :         bdev_nvme_set_keys_cb   cb_fn;
    9039             :         void                    *cb_ctx;
    9040             :         int                     status;
    9041             : };
    9042             : 
    9043             : static void
    9044           0 : bdev_nvme_free_set_keys_ctx(struct bdev_nvme_set_keys_ctx *ctx)
    9045             : {
    9046           0 :         if (ctx == NULL) {
    9047           0 :                 return;
    9048             :         }
    9049             : 
    9050           0 :         spdk_keyring_put_key(ctx->dhchap_key);
    9051           0 :         spdk_keyring_put_key(ctx->dhchap_ctrlr_key);
    9052           0 :         free(ctx);
    9053           0 : }
    9054             : 
    9055             : static void
    9056           0 : _bdev_nvme_set_keys_done(void *_ctx)
    9057             : {
    9058           0 :         struct bdev_nvme_set_keys_ctx *ctx = _ctx;
    9059             : 
    9060           0 :         ctx->cb_fn(ctx->cb_ctx, ctx->status);
    9061             : 
    9062           0 :         if (ctx->nctrlr != NULL) {
    9063           0 :                 nvme_ctrlr_release(ctx->nctrlr);
    9064           0 :         }
    9065           0 :         bdev_nvme_free_set_keys_ctx(ctx);
    9066           0 : }
    9067             : 
    9068             : static void
    9069           0 : bdev_nvme_set_keys_done(struct bdev_nvme_set_keys_ctx *ctx, int status)
    9070             : {
    9071           0 :         ctx->status = status;
    9072           0 :         spdk_thread_exec_msg(ctx->thread, _bdev_nvme_set_keys_done, ctx);
    9073           0 : }
    9074             : 
    9075             : static void bdev_nvme_authenticate_ctrlr(struct bdev_nvme_set_keys_ctx *ctx);
    9076             : 
    9077             : static void
    9078           0 : bdev_nvme_authenticate_ctrlr_continue(struct bdev_nvme_set_keys_ctx *ctx)
    9079             : {
    9080             :         struct nvme_ctrlr *next;
    9081             : 
    9082           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    9083           0 :         next = bdev_nvme_next_ctrlr_unsafe(NULL, ctx->nctrlr);
    9084           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9085             : 
    9086           0 :         nvme_ctrlr_release(ctx->nctrlr);
    9087           0 :         ctx->nctrlr = next;
    9088             : 
    9089           0 :         if (next == NULL) {
    9090           0 :                 bdev_nvme_set_keys_done(ctx, 0);
    9091           0 :         } else {
    9092           0 :                 bdev_nvme_authenticate_ctrlr(ctx);
    9093             :         }
    9094           0 : }
    9095             : 
    9096             : static void
    9097           0 : bdev_nvme_authenticate_qpairs_done(struct spdk_io_channel_iter *i, int status)
    9098             : {
    9099           0 :         struct bdev_nvme_set_keys_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
    9100             : 
    9101           0 :         if (status != 0) {
    9102           0 :                 bdev_nvme_set_keys_done(ctx, status);
    9103           0 :                 return;
    9104             :         }
    9105           0 :         bdev_nvme_authenticate_ctrlr_continue(ctx);
    9106           0 : }
    9107             : 
    9108             : static void
    9109           0 : bdev_nvme_authenticate_qpair_done(void *ctx, int status)
    9110             : {
    9111           0 :         spdk_for_each_channel_continue(ctx, status);
    9112           0 : }
    9113             : 
    9114             : static void
    9115           0 : bdev_nvme_authenticate_qpair(struct spdk_io_channel_iter *i)
    9116             : {
    9117           0 :         struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
    9118           0 :         struct nvme_ctrlr_channel *ctrlr_ch = spdk_io_channel_get_ctx(ch);
    9119           0 :         struct nvme_qpair *qpair = ctrlr_ch->qpair;
    9120             :         int rc;
    9121             : 
    9122           0 :         if (!nvme_qpair_is_connected(qpair)) {
    9123           0 :                 spdk_for_each_channel_continue(i, 0);
    9124           0 :                 return;
    9125             :         }
    9126             : 
    9127           0 :         rc = spdk_nvme_qpair_authenticate(qpair->qpair, bdev_nvme_authenticate_qpair_done, i);
    9128           0 :         if (rc != 0) {
    9129           0 :                 spdk_for_each_channel_continue(i, rc);
    9130           0 :         }
    9131           0 : }
    9132             : 
    9133             : static void
    9134           0 : bdev_nvme_authenticate_ctrlr_done(void *_ctx, int status)
    9135             : {
    9136           0 :         struct bdev_nvme_set_keys_ctx *ctx = _ctx;
    9137             : 
    9138           0 :         if (status != 0) {
    9139           0 :                 bdev_nvme_set_keys_done(ctx, status);
    9140           0 :                 return;
    9141             :         }
    9142             : 
    9143           0 :         spdk_for_each_channel(ctx->nctrlr, bdev_nvme_authenticate_qpair, ctx,
    9144             :                               bdev_nvme_authenticate_qpairs_done);
    9145           0 : }
    9146             : 
    9147             : static void
    9148           0 : bdev_nvme_authenticate_ctrlr(struct bdev_nvme_set_keys_ctx *ctx)
    9149             : {
    9150           0 :         struct spdk_nvme_ctrlr_key_opts opts = {};
    9151           0 :         struct nvme_ctrlr *nctrlr = ctx->nctrlr;
    9152             :         int rc;
    9153             : 
    9154           0 :         opts.size = SPDK_SIZEOF(&opts, dhchap_ctrlr_key);
    9155           0 :         opts.dhchap_key = ctx->dhchap_key;
    9156           0 :         opts.dhchap_ctrlr_key = ctx->dhchap_ctrlr_key;
    9157           0 :         rc = spdk_nvme_ctrlr_set_keys(nctrlr->ctrlr, &opts);
    9158           0 :         if (rc != 0) {
    9159           0 :                 bdev_nvme_set_keys_done(ctx, rc);
    9160           0 :                 return;
    9161             :         }
    9162             : 
    9163           0 :         if (ctx->dhchap_key != NULL) {
    9164           0 :                 rc = spdk_nvme_ctrlr_authenticate(nctrlr->ctrlr,
    9165           0 :                                                   bdev_nvme_authenticate_ctrlr_done, ctx);
    9166           0 :                 if (rc != 0) {
    9167           0 :                         bdev_nvme_set_keys_done(ctx, rc);
    9168           0 :                 }
    9169           0 :         } else {
    9170           0 :                 bdev_nvme_authenticate_ctrlr_continue(ctx);
    9171             :         }
    9172           0 : }
    9173             : 
    9174             : int
    9175           0 : bdev_nvme_set_keys(const char *name, const char *dhchap_key, const char *dhchap_ctrlr_key,
    9176             :                    bdev_nvme_set_keys_cb cb_fn, void *cb_ctx)
    9177             : {
    9178             :         struct bdev_nvme_set_keys_ctx *ctx;
    9179             :         struct nvme_bdev_ctrlr *nbdev_ctrlr;
    9180             :         struct nvme_ctrlr *nctrlr;
    9181             : 
    9182           0 :         ctx = calloc(1, sizeof(*ctx));
    9183           0 :         if (ctx == NULL) {
    9184           0 :                 return -ENOMEM;
    9185             :         }
    9186             : 
    9187           0 :         if (dhchap_key != NULL) {
    9188           0 :                 ctx->dhchap_key = spdk_keyring_get_key(dhchap_key);
    9189           0 :                 if (ctx->dhchap_key == NULL) {
    9190           0 :                         SPDK_ERRLOG("Could not find key %s for bdev %s\n", dhchap_key, name);
    9191           0 :                         bdev_nvme_free_set_keys_ctx(ctx);
    9192           0 :                         return -ENOKEY;
    9193             :                 }
    9194           0 :         }
    9195           0 :         if (dhchap_ctrlr_key != NULL) {
    9196           0 :                 ctx->dhchap_ctrlr_key = spdk_keyring_get_key(dhchap_ctrlr_key);
    9197           0 :                 if (ctx->dhchap_ctrlr_key == NULL) {
    9198           0 :                         SPDK_ERRLOG("Could not find key %s for bdev %s\n", dhchap_ctrlr_key, name);
    9199           0 :                         bdev_nvme_free_set_keys_ctx(ctx);
    9200           0 :                         return -ENOKEY;
    9201             :                 }
    9202           0 :         }
    9203             : 
    9204           0 :         pthread_mutex_lock(&g_bdev_nvme_mutex);
    9205           0 :         nbdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
    9206           0 :         if (nbdev_ctrlr == NULL) {
    9207           0 :                 SPDK_ERRLOG("Could not find bdev_ctrlr %s\n", name);
    9208           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9209           0 :                 bdev_nvme_free_set_keys_ctx(ctx);
    9210           0 :                 return -ENODEV;
    9211             :         }
    9212           0 :         nctrlr = bdev_nvme_next_ctrlr_unsafe(nbdev_ctrlr, NULL);
    9213           0 :         if (nctrlr == NULL) {
    9214           0 :                 SPDK_ERRLOG("Could not find any nvme_ctrlrs on bdev_ctrlr %s\n", name);
    9215           0 :                 pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9216           0 :                 bdev_nvme_free_set_keys_ctx(ctx);
    9217           0 :                 return -ENODEV;
    9218             :         }
    9219           0 :         pthread_mutex_unlock(&g_bdev_nvme_mutex);
    9220             : 
    9221           0 :         ctx->nctrlr = nctrlr;
    9222           0 :         ctx->cb_fn = cb_fn;
    9223           0 :         ctx->cb_ctx = cb_ctx;
    9224           0 :         ctx->thread = spdk_get_thread();
    9225             : 
    9226           0 :         bdev_nvme_authenticate_ctrlr(ctx);
    9227             : 
    9228           0 :         return 0;
    9229           0 : }
    9230             : 
    9231             : void
    9232           0 : nvme_io_path_info_json(struct spdk_json_write_ctx *w, struct nvme_io_path *io_path)
    9233             : {
    9234           0 :         struct nvme_ns *nvme_ns = io_path->nvme_ns;
    9235           0 :         struct nvme_ctrlr *nvme_ctrlr = io_path->qpair->ctrlr;
    9236             :         const struct spdk_nvme_ctrlr_data *cdata;
    9237             :         const struct spdk_nvme_transport_id *trid;
    9238             :         const char *adrfam_str;
    9239             : 
    9240           0 :         spdk_json_write_object_begin(w);
    9241             : 
    9242           0 :         spdk_json_write_named_string(w, "bdev_name", nvme_ns->bdev->disk.name);
    9243             : 
    9244           0 :         cdata = spdk_nvme_ctrlr_get_data(nvme_ctrlr->ctrlr);
    9245           0 :         trid = spdk_nvme_ctrlr_get_transport_id(nvme_ctrlr->ctrlr);
    9246             : 
    9247           0 :         spdk_json_write_named_uint32(w, "cntlid", cdata->cntlid);
    9248           0 :         spdk_json_write_named_bool(w, "current", nvme_io_path_is_current(io_path));
    9249           0 :         spdk_json_write_named_bool(w, "connected", nvme_qpair_is_connected(io_path->qpair));
    9250           0 :         spdk_json_write_named_bool(w, "accessible", nvme_ns_is_accessible(nvme_ns));
    9251             : 
    9252           0 :         spdk_json_write_named_object_begin(w, "transport");
    9253           0 :         spdk_json_write_named_string(w, "trtype", trid->trstring);
    9254           0 :         spdk_json_write_named_string(w, "traddr", trid->traddr);
    9255           0 :         if (trid->trsvcid[0] != '\0') {
    9256           0 :                 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid);
    9257           0 :         }
    9258           0 :         adrfam_str = spdk_nvme_transport_id_adrfam_str(trid->adrfam);
    9259           0 :         if (adrfam_str) {
    9260           0 :                 spdk_json_write_named_string(w, "adrfam", adrfam_str);
    9261           0 :         }
    9262           0 :         spdk_json_write_object_end(w);
    9263             : 
    9264           0 :         spdk_json_write_object_end(w);
    9265           0 : }
    9266             : 
    9267             : void
    9268           0 : bdev_nvme_get_discovery_info(struct spdk_json_write_ctx *w)
    9269             : {
    9270             :         struct discovery_ctx *ctx;
    9271             :         struct discovery_entry_ctx *entry_ctx;
    9272             : 
    9273           0 :         spdk_json_write_array_begin(w);
    9274           0 :         TAILQ_FOREACH(ctx, &g_discovery_ctxs, tailq) {
    9275           0 :                 spdk_json_write_object_begin(w);
    9276           0 :                 spdk_json_write_named_string(w, "name", ctx->name);
    9277             : 
    9278           0 :                 spdk_json_write_named_object_begin(w, "trid");
    9279           0 :                 nvme_bdev_dump_trid_json(&ctx->trid, w);
    9280           0 :                 spdk_json_write_object_end(w);
    9281             : 
    9282           0 :                 spdk_json_write_named_array_begin(w, "referrals");
    9283           0 :                 TAILQ_FOREACH(entry_ctx, &ctx->discovery_entry_ctxs, tailq) {
    9284           0 :                         spdk_json_write_object_begin(w);
    9285           0 :                         spdk_json_write_named_object_begin(w, "trid");
    9286           0 :                         nvme_bdev_dump_trid_json(&entry_ctx->trid, w);
    9287           0 :                         spdk_json_write_object_end(w);
    9288           0 :                         spdk_json_write_object_end(w);
    9289           0 :                 }
    9290           0 :                 spdk_json_write_array_end(w);
    9291             : 
    9292           0 :                 spdk_json_write_object_end(w);
    9293           0 :         }
    9294           0 :         spdk_json_write_array_end(w);
    9295           0 : }
    9296             : 
    9297           1 : SPDK_LOG_REGISTER_COMPONENT(bdev_nvme)
    9298             : 
    9299             : static void
    9300           0 : bdev_nvme_trace(void)
    9301             : {
    9302           0 :         struct spdk_trace_tpoint_opts opts[] = {
    9303             :                 {
    9304             :                         "BDEV_NVME_IO_START", TRACE_BDEV_NVME_IO_START,
    9305             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 1,
    9306             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    9307             :                 },
    9308             :                 {
    9309             :                         "BDEV_NVME_IO_DONE", TRACE_BDEV_NVME_IO_DONE,
    9310             :                         OWNER_TYPE_NONE, OBJECT_BDEV_NVME_IO, 0,
    9311             :                         {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
    9312             :                 }
    9313             :         };
    9314             : 
    9315             : 
    9316           0 :         spdk_trace_register_object(OBJECT_BDEV_NVME_IO, 'N');
    9317           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
    9318           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    9319           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_SUBMIT, OBJECT_BDEV_NVME_IO, 0);
    9320           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_PCIE_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    9321           0 :         spdk_trace_tpoint_register_relation(TRACE_NVME_TCP_COMPLETE, OBJECT_BDEV_NVME_IO, 0);
    9322           0 : }
    9323           1 : SPDK_TRACE_REGISTER_FN(bdev_nvme_trace, "bdev_nvme", TRACE_GROUP_BDEV_NVME)

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