LCOV - code coverage report
Current view: top level - module/bdev/error - vbdev_error.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 249 0.0 %
Date: 2024-07-15 02:08:34 Functions: 0 23 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2017 Intel Corporation.
       3             :  *   All rights reserved.
       4             :  */
       5             : 
       6             : /*
       7             :  * This is a module for test purpose which will simulate error cases for bdev.
       8             :  */
       9             : 
      10             : #include "spdk/stdinc.h"
      11             : #include "spdk/rpc.h"
      12             : #include "spdk/util.h"
      13             : #include "spdk/endian.h"
      14             : #include "spdk/nvme_spec.h"
      15             : #include "spdk/string.h"
      16             : 
      17             : #include "spdk/bdev_module.h"
      18             : #include "spdk/log.h"
      19             : 
      20             : #include "vbdev_error.h"
      21             : 
      22             : struct spdk_vbdev_error_config {
      23             :         char *base_bdev;
      24             :         struct spdk_uuid uuid;
      25             :         TAILQ_ENTRY(spdk_vbdev_error_config) tailq;
      26             : };
      27             : 
      28             : static TAILQ_HEAD(, spdk_vbdev_error_config) g_error_config
      29             :         = TAILQ_HEAD_INITIALIZER(g_error_config);
      30             : 
      31             : struct vbdev_error_info {
      32             :         uint32_t                        error_type;
      33             :         uint32_t                        error_num;
      34             :         uint64_t                        error_qd;
      35             :         uint64_t                        corrupt_offset;
      36             :         uint8_t                         corrupt_value;
      37             : };
      38             : 
      39             : /* Context for each error bdev */
      40             : struct error_disk {
      41             :         struct spdk_bdev_part           part;
      42             :         struct vbdev_error_info         error_vector[SPDK_BDEV_IO_TYPE_RESET];
      43             :         TAILQ_HEAD(, spdk_bdev_io)      pending_ios;
      44             : };
      45             : 
      46             : struct error_channel {
      47             :         struct spdk_bdev_part_channel   part_ch;
      48             :         uint64_t                        io_inflight;
      49             : };
      50             : 
      51             : static pthread_mutex_t g_vbdev_error_mutex = PTHREAD_MUTEX_INITIALIZER;
      52             : static SPDK_BDEV_PART_TAILQ g_error_disks = TAILQ_HEAD_INITIALIZER(g_error_disks);
      53             : 
      54             : static int vbdev_error_init(void);
      55             : static void vbdev_error_fini(void);
      56             : 
      57             : static void vbdev_error_examine(struct spdk_bdev *bdev);
      58             : static int vbdev_error_config_json(struct spdk_json_write_ctx *w);
      59             : 
      60             : static int vbdev_error_config_add(const char *base_bdev_name, const struct spdk_uuid *uuid);
      61             : static int vbdev_error_config_remove(const char *base_bdev_name);
      62             : 
      63             : static struct spdk_bdev_module error_if = {
      64             :         .name = "error",
      65             :         .module_init = vbdev_error_init,
      66             :         .module_fini = vbdev_error_fini,
      67             :         .examine_config = vbdev_error_examine,
      68             :         .config_json = vbdev_error_config_json,
      69             : 
      70             : };
      71             : 
      72           0 : SPDK_BDEV_MODULE_REGISTER(error, &error_if)
      73             : 
      74             : static void
      75           0 : dummy_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx)
      76             : {
      77           0 : }
      78             : 
      79             : int
      80           0 : vbdev_error_inject_error(char *name, const struct vbdev_error_inject_opts *opts)
      81             : {
      82           0 :         struct spdk_bdev_desc *desc;
      83             :         struct spdk_bdev *bdev;
      84             :         struct spdk_bdev_part *part;
      85           0 :         struct error_disk *error_disk = NULL;
      86             :         uint32_t i;
      87           0 :         int rc = 0;
      88             : 
      89           0 :         if (opts->error_type == VBDEV_IO_CORRUPT_DATA) {
      90           0 :                 if (opts->corrupt_value == 0) {
      91             :                         /* If corrupt_value is 0, XOR cannot cause data corruption. */
      92           0 :                         SPDK_ERRLOG("corrupt_value should be non-zero.\n");
      93           0 :                         return -EINVAL;
      94             :                 }
      95             :         }
      96             : 
      97           0 :         pthread_mutex_lock(&g_vbdev_error_mutex);
      98             : 
      99           0 :         rc = spdk_bdev_open_ext(name, false, dummy_bdev_event_cb, NULL, &desc);
     100           0 :         if (rc != 0) {
     101           0 :                 SPDK_ERRLOG("Could not open ErrorInjection bdev %s\n", name);
     102           0 :                 pthread_mutex_unlock(&g_vbdev_error_mutex);
     103           0 :                 return rc;
     104             :         }
     105             : 
     106           0 :         bdev = spdk_bdev_desc_get_bdev(desc);
     107             : 
     108           0 :         TAILQ_FOREACH(part, &g_error_disks, tailq) {
     109           0 :                 if (bdev == spdk_bdev_part_get_bdev(part)) {
     110           0 :                         error_disk = (struct error_disk *)part;
     111           0 :                         break;
     112             :                 }
     113             :         }
     114             : 
     115           0 :         if (error_disk == NULL) {
     116           0 :                 SPDK_ERRLOG("Could not find ErrorInjection bdev %s\n", name);
     117           0 :                 rc = -ENODEV;
     118           0 :                 goto exit;
     119             :         }
     120             : 
     121           0 :         if (0xffffffff == opts->io_type) {
     122           0 :                 for (i = 0; i < SPDK_COUNTOF(error_disk->error_vector); i++) {
     123           0 :                         error_disk->error_vector[i].error_type = opts->error_type;
     124           0 :                         error_disk->error_vector[i].error_num = opts->error_num;
     125           0 :                         error_disk->error_vector[i].error_qd = opts->error_qd;
     126           0 :                         error_disk->error_vector[i].corrupt_offset = opts->corrupt_offset;
     127           0 :                         error_disk->error_vector[i].corrupt_value = opts->corrupt_value;
     128             :                 }
     129           0 :         } else if (0 == opts->io_type) {
     130           0 :                 for (i = 0; i < SPDK_COUNTOF(error_disk->error_vector); i++) {
     131           0 :                         error_disk->error_vector[i].error_num = 0;
     132             :                 }
     133             :         } else {
     134           0 :                 error_disk->error_vector[opts->io_type].error_type = opts->error_type;
     135           0 :                 error_disk->error_vector[opts->io_type].error_num = opts->error_num;
     136           0 :                 error_disk->error_vector[opts->io_type].error_qd = opts->error_qd;
     137           0 :                 error_disk->error_vector[opts->io_type].corrupt_offset = opts->corrupt_offset;
     138           0 :                 error_disk->error_vector[opts->io_type].corrupt_value = opts->corrupt_value;
     139             :         }
     140             : 
     141           0 : exit:
     142           0 :         spdk_bdev_close(desc);
     143           0 :         pthread_mutex_unlock(&g_vbdev_error_mutex);
     144           0 :         return rc;
     145             : }
     146             : 
     147             : static void
     148           0 : vbdev_error_reset(struct error_disk *error_disk, struct spdk_bdev_io *bdev_io)
     149             : {
     150             :         struct spdk_bdev_io *pending_io, *tmp;
     151             : 
     152           0 :         TAILQ_FOREACH_SAFE(pending_io, &error_disk->pending_ios, module_link, tmp) {
     153           0 :                 TAILQ_REMOVE(&error_disk->pending_ios, pending_io, module_link);
     154           0 :                 spdk_bdev_io_complete(pending_io, SPDK_BDEV_IO_STATUS_FAILED);
     155             :         }
     156           0 :         spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_SUCCESS);
     157           0 : }
     158             : 
     159             : static uint32_t
     160           0 : vbdev_error_get_error_type(struct error_disk *error_disk, uint32_t io_type)
     161             : {
     162           0 :         switch (io_type) {
     163           0 :         case SPDK_BDEV_IO_TYPE_READ:
     164             :         case SPDK_BDEV_IO_TYPE_WRITE:
     165             :         case SPDK_BDEV_IO_TYPE_UNMAP:
     166             :         case SPDK_BDEV_IO_TYPE_FLUSH:
     167           0 :                 break;
     168           0 :         default:
     169           0 :                 return 0;
     170             :         }
     171             : 
     172           0 :         if (error_disk->error_vector[io_type].error_num) {
     173           0 :                 return error_disk->error_vector[io_type].error_type;
     174             :         }
     175           0 :         return 0;
     176             : }
     177             : 
     178             : static void
     179           0 : vbdev_error_corrupt_io_data(struct spdk_bdev_io *bdev_io, uint64_t corrupt_offset,
     180             :                             uint8_t corrupt_value)
     181             : {
     182             :         uint8_t *buf;
     183             :         int i;
     184             : 
     185           0 :         if (bdev_io->u.bdev.iovs == NULL || bdev_io->u.bdev.iovs[0].iov_base == NULL) {
     186           0 :                 return;
     187             :         }
     188             : 
     189           0 :         for (i = 0; i < bdev_io->u.bdev.iovcnt; i++) {
     190           0 :                 if (bdev_io->u.bdev.iovs[i].iov_len > corrupt_offset) {
     191           0 :                         buf = (uint8_t *)bdev_io->u.bdev.iovs[i].iov_base;
     192             : 
     193           0 :                         buf[corrupt_offset] ^= corrupt_value;
     194           0 :                         break;
     195             :                 }
     196             : 
     197           0 :                 corrupt_offset -= bdev_io->u.bdev.iovs[i].iov_len;
     198             :         }
     199             : }
     200             : 
     201             : static void
     202           0 : vbdev_error_complete_request(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
     203             : {
     204           0 :         int status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
     205           0 :         struct error_disk *error_disk = bdev_io->bdev->ctxt;
     206           0 :         struct error_channel *ch = spdk_io_channel_get_ctx(spdk_bdev_io_get_io_channel(bdev_io));
     207             :         uint32_t error_type;
     208             : 
     209           0 :         assert(ch->io_inflight > 0);
     210           0 :         ch->io_inflight--;
     211             : 
     212           0 :         if (success && bdev_io->type == SPDK_BDEV_IO_TYPE_READ) {
     213           0 :                 error_type = vbdev_error_get_error_type(error_disk, bdev_io->type);
     214           0 :                 if (error_type == VBDEV_IO_CORRUPT_DATA) {
     215           0 :                         error_disk->error_vector[bdev_io->type].error_num--;
     216             : 
     217           0 :                         vbdev_error_corrupt_io_data(bdev_io,
     218           0 :                                                     error_disk->error_vector[bdev_io->type].corrupt_offset,
     219           0 :                                                     error_disk->error_vector[bdev_io->type].corrupt_value);
     220             :                 }
     221             :         }
     222             : 
     223           0 :         spdk_bdev_io_complete(bdev_io, status);
     224           0 : }
     225             : 
     226             : static void
     227           0 : vbdev_error_submit_request(struct spdk_io_channel *_ch, struct spdk_bdev_io *bdev_io)
     228             : {
     229           0 :         struct error_channel *ch = spdk_io_channel_get_ctx(_ch);
     230           0 :         struct error_disk *error_disk = bdev_io->bdev->ctxt;
     231             :         uint32_t error_type;
     232             :         int rc;
     233             : 
     234           0 :         if (bdev_io->type == SPDK_BDEV_IO_TYPE_RESET) {
     235           0 :                 vbdev_error_reset(error_disk, bdev_io);
     236           0 :                 return;
     237             :         }
     238             : 
     239           0 :         error_type = vbdev_error_get_error_type(error_disk, bdev_io->type);
     240             : 
     241           0 :         if (ch->io_inflight < error_disk->error_vector[bdev_io->type].error_qd) {
     242           0 :                 error_type = 0;
     243             :         }
     244             : 
     245           0 :         switch (error_type) {
     246           0 :         case VBDEV_IO_FAILURE:
     247           0 :                 error_disk->error_vector[bdev_io->type].error_num--;
     248           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
     249           0 :                 break;
     250           0 :         case VBDEV_IO_NOMEM:
     251           0 :                 error_disk->error_vector[bdev_io->type].error_num--;
     252           0 :                 spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_NOMEM);
     253           0 :                 break;
     254           0 :         case VBDEV_IO_PENDING:
     255           0 :                 TAILQ_INSERT_TAIL(&error_disk->pending_ios, bdev_io, module_link);
     256           0 :                 error_disk->error_vector[bdev_io->type].error_num--;
     257           0 :                 break;
     258           0 :         case VBDEV_IO_CORRUPT_DATA:
     259           0 :                 if (bdev_io->type == SPDK_BDEV_IO_TYPE_WRITE) {
     260           0 :                         error_disk->error_vector[bdev_io->type].error_num--;
     261             : 
     262           0 :                         vbdev_error_corrupt_io_data(bdev_io,
     263           0 :                                                     error_disk->error_vector[bdev_io->type].corrupt_offset,
     264           0 :                                                     error_disk->error_vector[bdev_io->type].corrupt_value);
     265             :                 }
     266             :         /* fallthrough */
     267             :         case 0:
     268           0 :                 rc = spdk_bdev_part_submit_request_ext(&ch->part_ch, bdev_io,
     269             :                                                        vbdev_error_complete_request);
     270             : 
     271           0 :                 if (rc) {
     272           0 :                         SPDK_ERRLOG("bdev_error: submit request failed, rc=%d\n", rc);
     273           0 :                         spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
     274             :                 }
     275           0 :                 ch->io_inflight++;
     276           0 :                 break;
     277           0 :         default:
     278           0 :                 assert(false);
     279             :                 break;
     280             :         }
     281             : }
     282             : 
     283             : static int
     284           0 : vbdev_error_destruct(void *ctx)
     285             : {
     286           0 :         struct error_disk *error_disk = ctx;
     287           0 :         struct spdk_bdev *base_bdev = spdk_bdev_part_get_base_bdev(&error_disk->part);
     288             :         int rc;
     289             : 
     290           0 :         rc = vbdev_error_config_remove(base_bdev->name);
     291           0 :         if (rc != 0) {
     292           0 :                 SPDK_ERRLOG("vbdev_error_config_remove() failed\n");
     293             :         }
     294             : 
     295           0 :         return spdk_bdev_part_free(&error_disk->part);
     296             : }
     297             : 
     298             : static int
     299           0 : vbdev_error_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
     300             : {
     301           0 :         struct error_disk *error_disk = ctx;
     302           0 :         struct spdk_bdev *base_bdev = spdk_bdev_part_get_base_bdev(&error_disk->part);
     303             : 
     304           0 :         spdk_json_write_named_object_begin(w, "error_disk");
     305             : 
     306           0 :         spdk_json_write_named_string(w, "base_bdev", base_bdev->name);
     307             : 
     308           0 :         spdk_json_write_object_end(w);
     309             : 
     310           0 :         return 0;
     311             : }
     312             : 
     313             : static void
     314           0 : vbdev_error_write_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
     315             : {
     316             :         /* No config per bdev. */
     317           0 : }
     318             : 
     319             : 
     320             : static struct spdk_bdev_fn_table vbdev_error_fn_table = {
     321             :         .destruct               = vbdev_error_destruct,
     322             :         .submit_request         = vbdev_error_submit_request,
     323             :         .dump_info_json         = vbdev_error_dump_info_json,
     324             :         .write_config_json      = vbdev_error_write_config_json
     325             : };
     326             : 
     327             : static void
     328           0 : vbdev_error_base_bdev_hotremove_cb(void *_part_base)
     329             : {
     330           0 :         struct spdk_bdev_part_base *part_base = _part_base;
     331             : 
     332           0 :         spdk_bdev_part_base_hotremove(part_base, &g_error_disks);
     333           0 : }
     334             : 
     335             : static int
     336           0 : _vbdev_error_create(const char *base_bdev_name, const struct spdk_uuid *uuid)
     337             : {
     338           0 :         struct spdk_bdev_part_base *base = NULL;
     339           0 :         struct error_disk *disk = NULL;
     340             :         struct spdk_bdev *base_bdev, *bdev;
     341             :         char *name;
     342             :         int rc;
     343             : 
     344           0 :         rc = spdk_bdev_part_base_construct_ext(base_bdev_name,
     345             :                                                vbdev_error_base_bdev_hotremove_cb,
     346             :                                                &error_if, &vbdev_error_fn_table, &g_error_disks,
     347             :                                                NULL, NULL, sizeof(struct error_channel),
     348             :                                                NULL, NULL, &base);
     349           0 :         if (rc != 0) {
     350           0 :                 if (rc != -ENODEV) {
     351           0 :                         SPDK_ERRLOG("could not construct part base for bdev %s\n", base_bdev_name);
     352             :                 }
     353           0 :                 return rc;
     354             :         }
     355             : 
     356           0 :         base_bdev = spdk_bdev_part_base_get_bdev(base);
     357             : 
     358           0 :         disk = calloc(1, sizeof(*disk));
     359           0 :         if (!disk) {
     360           0 :                 SPDK_ERRLOG("Memory allocation failure\n");
     361           0 :                 spdk_bdev_part_base_free(base);
     362           0 :                 return -ENOMEM;
     363             :         }
     364             : 
     365           0 :         name = spdk_sprintf_alloc("EE_%s", base_bdev_name);
     366           0 :         if (!name) {
     367           0 :                 SPDK_ERRLOG("name allocation failure\n");
     368           0 :                 spdk_bdev_part_base_free(base);
     369           0 :                 free(disk);
     370           0 :                 return -ENOMEM;
     371             :         }
     372             : 
     373           0 :         if (!spdk_uuid_is_null(uuid)) {
     374           0 :                 bdev = spdk_bdev_part_get_bdev(&disk->part);
     375           0 :                 spdk_uuid_copy(&bdev->uuid, uuid);
     376             :         }
     377             : 
     378           0 :         rc = spdk_bdev_part_construct(&disk->part, base, name, 0, base_bdev->blockcnt,
     379             :                                       "Error Injection Disk");
     380           0 :         free(name);
     381           0 :         if (rc) {
     382           0 :                 SPDK_ERRLOG("could not construct part for bdev %s\n", base_bdev_name);
     383             :                 /* spdk_bdev_part_construct will free name on failure */
     384           0 :                 spdk_bdev_part_base_free(base);
     385           0 :                 free(disk);
     386           0 :                 return rc;
     387             :         }
     388             : 
     389           0 :         TAILQ_INIT(&disk->pending_ios);
     390             : 
     391           0 :         return 0;
     392             : }
     393             : 
     394             : int
     395           0 : vbdev_error_create(const char *base_bdev_name, const struct spdk_uuid *uuid)
     396             : {
     397             :         int rc;
     398             : 
     399           0 :         rc = vbdev_error_config_add(base_bdev_name, uuid);
     400           0 :         if (rc != 0) {
     401           0 :                 SPDK_ERRLOG("Adding config for ErrorInjection bdev %s failed (rc=%d)\n",
     402             :                             base_bdev_name, rc);
     403           0 :                 return rc;
     404             :         }
     405             : 
     406           0 :         rc = _vbdev_error_create(base_bdev_name, uuid);
     407           0 :         if (rc == -ENODEV) {
     408           0 :                 rc = 0;
     409           0 :         } else if (rc != 0) {
     410           0 :                 vbdev_error_config_remove(base_bdev_name);
     411           0 :                 SPDK_ERRLOG("Could not create ErrorInjection bdev %s (rc=%d)\n",
     412             :                             base_bdev_name, rc);
     413             :         }
     414             : 
     415           0 :         return rc;
     416             : }
     417             : 
     418             : void
     419           0 : vbdev_error_delete(const char *error_vbdev_name, spdk_delete_error_complete cb_fn, void *cb_arg)
     420             : {
     421             :         int rc;
     422             : 
     423           0 :         rc = spdk_bdev_unregister_by_name(error_vbdev_name, &error_if, cb_fn, cb_arg);
     424           0 :         if (rc != 0) {
     425           0 :                 cb_fn(cb_arg, rc);
     426             :         }
     427           0 : }
     428             : 
     429             : static void
     430           0 : vbdev_error_clear_config(void)
     431             : {
     432             :         struct spdk_vbdev_error_config *cfg;
     433             : 
     434           0 :         while ((cfg = TAILQ_FIRST(&g_error_config))) {
     435           0 :                 TAILQ_REMOVE(&g_error_config, cfg, tailq);
     436           0 :                 free(cfg->base_bdev);
     437           0 :                 free(cfg);
     438             :         }
     439           0 : }
     440             : 
     441             : static struct spdk_vbdev_error_config *
     442           0 : vbdev_error_config_find_by_base_name(const char *base_bdev_name)
     443             : {
     444             :         struct spdk_vbdev_error_config *cfg;
     445             : 
     446           0 :         TAILQ_FOREACH(cfg, &g_error_config, tailq) {
     447           0 :                 if (strcmp(cfg->base_bdev, base_bdev_name) == 0) {
     448           0 :                         return cfg;
     449             :                 }
     450             :         }
     451             : 
     452           0 :         return NULL;
     453             : }
     454             : 
     455             : static int
     456           0 : vbdev_error_config_add(const char *base_bdev_name, const struct spdk_uuid *uuid)
     457             : {
     458             :         struct spdk_vbdev_error_config *cfg;
     459             : 
     460           0 :         cfg = vbdev_error_config_find_by_base_name(base_bdev_name);
     461           0 :         if (cfg) {
     462           0 :                 SPDK_ERRLOG("vbdev_error_config for bdev %s already exists\n",
     463             :                             base_bdev_name);
     464           0 :                 return -EEXIST;
     465             :         }
     466             : 
     467           0 :         cfg = calloc(1, sizeof(*cfg));
     468           0 :         if (!cfg) {
     469           0 :                 SPDK_ERRLOG("calloc() failed for vbdev_error_config\n");
     470           0 :                 return -ENOMEM;
     471             :         }
     472             : 
     473           0 :         cfg->base_bdev = strdup(base_bdev_name);
     474           0 :         if (!cfg->base_bdev) {
     475           0 :                 free(cfg);
     476           0 :                 SPDK_ERRLOG("strdup() failed for base_bdev_name\n");
     477           0 :                 return -ENOMEM;
     478             :         }
     479             : 
     480           0 :         spdk_uuid_copy(&cfg->uuid, uuid);
     481           0 :         TAILQ_INSERT_TAIL(&g_error_config, cfg, tailq);
     482             : 
     483           0 :         return 0;
     484             : }
     485             : 
     486             : static int
     487           0 : vbdev_error_config_remove(const char *base_bdev_name)
     488             : {
     489             :         struct spdk_vbdev_error_config *cfg;
     490             : 
     491           0 :         cfg = vbdev_error_config_find_by_base_name(base_bdev_name);
     492           0 :         if (!cfg) {
     493           0 :                 return -ENOENT;
     494             :         }
     495             : 
     496           0 :         TAILQ_REMOVE(&g_error_config, cfg, tailq);
     497           0 :         free(cfg->base_bdev);
     498           0 :         free(cfg);
     499           0 :         return 0;
     500             : }
     501             : 
     502             : static int
     503           0 : vbdev_error_init(void)
     504             : {
     505           0 :         return 0;
     506             : }
     507             : 
     508             : static void
     509           0 : vbdev_error_fini(void)
     510             : {
     511           0 :         vbdev_error_clear_config();
     512           0 : }
     513             : 
     514             : static void
     515           0 : vbdev_error_examine(struct spdk_bdev *bdev)
     516             : {
     517             :         struct spdk_vbdev_error_config *cfg;
     518             :         int rc;
     519             : 
     520           0 :         cfg = vbdev_error_config_find_by_base_name(bdev->name);
     521           0 :         if (cfg != NULL) {
     522           0 :                 rc = _vbdev_error_create(bdev->name, &cfg->uuid);
     523           0 :                 if (rc != 0) {
     524           0 :                         SPDK_ERRLOG("could not create error vbdev for bdev %s at examine\n",
     525             :                                     bdev->name);
     526             :                 }
     527             :         }
     528             : 
     529           0 :         spdk_bdev_module_examine_done(&error_if);
     530           0 : }
     531             : 
     532             : static int
     533           0 : vbdev_error_config_json(struct spdk_json_write_ctx *w)
     534             : {
     535             :         struct spdk_vbdev_error_config *cfg;
     536             : 
     537           0 :         TAILQ_FOREACH(cfg, &g_error_config, tailq) {
     538           0 :                 spdk_json_write_object_begin(w);
     539             : 
     540           0 :                 spdk_json_write_named_string(w, "method", "bdev_error_create");
     541           0 :                 spdk_json_write_named_object_begin(w, "params");
     542           0 :                 spdk_json_write_named_string(w, "base_name", cfg->base_bdev);
     543           0 :                 if (!spdk_uuid_is_null(&cfg->uuid)) {
     544           0 :                         spdk_json_write_named_uuid(w, "uuid", &cfg->uuid);
     545             :                 }
     546           0 :                 spdk_json_write_object_end(w);
     547             : 
     548           0 :                 spdk_json_write_object_end(w);
     549             :         }
     550             : 
     551           0 :         return 0;
     552             : }

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