1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2016 Intel Corporation. All rights reserved. 3 * Copyright (c) 2018-2019, 2021 Mellanox Technologies LTD. All rights reserved. 4 * Copyright (c) 2021, 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved. 5 */ 6 7 #include "spdk/stdinc.h" 8 9 #include "spdk/bdev.h" 10 #include "spdk/bit_array.h" 11 #include "spdk/thread.h" 12 #include "spdk/nvmf.h" 13 #include "spdk/endian.h" 14 #include "spdk/string.h" 15 #include "spdk/log.h" 16 #include "spdk_internal/usdt.h" 17 18 #include "nvmf_internal.h" 19 #include "transport.h" 20 21 SPDK_LOG_REGISTER_COMPONENT(nvmf) 22 23 #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024 24 25 static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts); 26 27 typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status); 28 29 /* supplied to a single call to nvmf_qpair_disconnect */ 30 struct nvmf_qpair_disconnect_ctx { 31 struct spdk_nvmf_qpair *qpair; 32 struct spdk_nvmf_ctrlr *ctrlr; 33 nvmf_qpair_disconnect_cb cb_fn; 34 struct spdk_thread *thread; 35 void *ctx; 36 uint16_t qid; 37 }; 38 39 /* 40 * There are several times when we need to iterate through the list of all qpairs and selectively delete them. 41 * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from 42 * to enable calling nvmf_qpair_disconnect on the next desired qpair. 43 */ 44 struct nvmf_qpair_disconnect_many_ctx { 45 struct spdk_nvmf_subsystem *subsystem; 46 struct spdk_nvmf_poll_group *group; 47 spdk_nvmf_poll_group_mod_done cpl_fn; 48 void *cpl_ctx; 49 }; 50 51 static void 52 nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair, 53 enum spdk_nvmf_qpair_state state) 54 { 55 assert(qpair != NULL); 56 assert(qpair->group->thread == spdk_get_thread()); 57 58 qpair->state = state; 59 } 60 61 static int 62 nvmf_poll_group_poll(void *ctx) 63 { 64 struct spdk_nvmf_poll_group *group = ctx; 65 int rc; 66 int count = 0; 67 struct spdk_nvmf_transport_poll_group *tgroup; 68 69 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 70 rc = nvmf_transport_poll_group_poll(tgroup); 71 if (rc < 0) { 72 return SPDK_POLLER_BUSY; 73 } 74 count += rc; 75 } 76 77 return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE; 78 } 79 80 /* 81 * Reset and clean up the poll group (I/O channel code will actually free the 82 * group). 83 */ 84 static void 85 nvmf_tgt_cleanup_poll_group(struct spdk_nvmf_poll_group *group) 86 { 87 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 88 struct spdk_nvmf_subsystem_poll_group *sgroup; 89 uint32_t sid, nsid; 90 91 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 92 TAILQ_REMOVE(&group->tgroups, tgroup, link); 93 nvmf_transport_poll_group_destroy(tgroup); 94 } 95 96 for (sid = 0; sid < group->num_sgroups; sid++) { 97 sgroup = &group->sgroups[sid]; 98 99 assert(sgroup != NULL); 100 101 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 102 if (sgroup->ns_info[nsid].channel) { 103 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 104 sgroup->ns_info[nsid].channel = NULL; 105 } 106 } 107 108 free(sgroup->ns_info); 109 } 110 111 free(group->sgroups); 112 113 spdk_poller_unregister(&group->poller); 114 115 if (group->destroy_cb_fn) { 116 group->destroy_cb_fn(group->destroy_cb_arg, 0); 117 } 118 } 119 120 /* 121 * Callback to unregister a poll group from the target, and clean up its state. 122 */ 123 static void 124 nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf) 125 { 126 struct spdk_nvmf_tgt *tgt = io_device; 127 struct spdk_nvmf_poll_group *group = ctx_buf; 128 129 SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group, spdk_thread_get_id(group->thread)); 130 131 pthread_mutex_lock(&tgt->mutex); 132 TAILQ_REMOVE(&tgt->poll_groups, group, link); 133 tgt->num_poll_groups--; 134 pthread_mutex_unlock(&tgt->mutex); 135 136 assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING)); 137 nvmf_tgt_cleanup_poll_group(group); 138 } 139 140 static int 141 nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group, 142 struct spdk_nvmf_transport *transport) 143 { 144 struct spdk_nvmf_transport_poll_group *tgroup; 145 146 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 147 if (tgroup->transport == transport) { 148 /* Transport already in the poll group */ 149 return 0; 150 } 151 } 152 153 tgroup = nvmf_transport_poll_group_create(transport, group); 154 if (!tgroup) { 155 SPDK_ERRLOG("Unable to create poll group for transport\n"); 156 return -1; 157 } 158 SPDK_DTRACE_PROBE2_TICKS(nvmf_transport_poll_group_create, transport, 159 spdk_thread_get_id(group->thread)); 160 161 tgroup->group = group; 162 TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); 163 164 return 0; 165 } 166 167 static int 168 nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf) 169 { 170 struct spdk_nvmf_tgt *tgt = io_device; 171 struct spdk_nvmf_poll_group *group = ctx_buf; 172 struct spdk_nvmf_transport *transport; 173 struct spdk_nvmf_subsystem *subsystem; 174 struct spdk_thread *thread = spdk_get_thread(); 175 int rc; 176 177 group->tgt = tgt; 178 TAILQ_INIT(&group->tgroups); 179 TAILQ_INIT(&group->qpairs); 180 group->thread = thread; 181 pthread_mutex_init(&group->mutex, NULL); 182 183 group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0); 184 185 SPDK_DTRACE_PROBE1_TICKS(nvmf_create_poll_group, spdk_thread_get_id(thread)); 186 187 TAILQ_FOREACH(transport, &tgt->transports, link) { 188 rc = nvmf_poll_group_add_transport(group, transport); 189 if (rc != 0) { 190 nvmf_tgt_cleanup_poll_group(group); 191 return rc; 192 } 193 } 194 195 group->num_sgroups = tgt->max_subsystems; 196 group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group)); 197 if (!group->sgroups) { 198 nvmf_tgt_cleanup_poll_group(group); 199 return -ENOMEM; 200 } 201 202 for (subsystem = spdk_nvmf_subsystem_get_first(tgt); 203 subsystem != NULL; 204 subsystem = spdk_nvmf_subsystem_get_next(subsystem)) { 205 if (nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) { 206 nvmf_tgt_cleanup_poll_group(group); 207 return -1; 208 } 209 } 210 211 pthread_mutex_lock(&tgt->mutex); 212 tgt->num_poll_groups++; 213 TAILQ_INSERT_TAIL(&tgt->poll_groups, group, link); 214 pthread_mutex_unlock(&tgt->mutex); 215 216 return 0; 217 } 218 219 static void 220 _nvmf_tgt_disconnect_qpairs(void *ctx) 221 { 222 struct spdk_nvmf_qpair *qpair, *qpair_tmp; 223 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 224 struct spdk_nvmf_poll_group *group = qpair_ctx->group; 225 struct spdk_io_channel *ch; 226 int rc; 227 228 TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) { 229 rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 230 if (rc && rc != -EINPROGRESS) { 231 break; 232 } 233 } 234 235 if (TAILQ_EMPTY(&group->qpairs)) { 236 /* When the refcount from the channels reaches 0, nvmf_tgt_destroy_poll_group will be called. */ 237 ch = spdk_io_channel_from_ctx(group); 238 spdk_put_io_channel(ch); 239 free(qpair_ctx); 240 return; 241 } 242 243 /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */ 244 spdk_thread_send_msg(spdk_get_thread(), _nvmf_tgt_disconnect_qpairs, ctx); 245 } 246 247 static void 248 nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group) 249 { 250 struct nvmf_qpair_disconnect_many_ctx *ctx; 251 252 SPDK_DTRACE_PROBE1_TICKS(nvmf_destroy_poll_group_qpairs, spdk_thread_get_id(group->thread)); 253 254 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 255 if (!ctx) { 256 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n"); 257 return; 258 } 259 260 ctx->group = group; 261 _nvmf_tgt_disconnect_qpairs(ctx); 262 } 263 264 struct spdk_nvmf_tgt * 265 spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *opts) 266 { 267 struct spdk_nvmf_tgt *tgt, *tmp_tgt; 268 269 if (strnlen(opts->name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) { 270 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH); 271 return NULL; 272 } 273 274 TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) { 275 if (!strncmp(opts->name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) { 276 SPDK_ERRLOG("Provided target name must be unique.\n"); 277 return NULL; 278 } 279 } 280 281 tgt = calloc(1, sizeof(*tgt)); 282 if (!tgt) { 283 return NULL; 284 } 285 286 snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts->name); 287 288 if (!opts || !opts->max_subsystems) { 289 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS; 290 } else { 291 tgt->max_subsystems = opts->max_subsystems; 292 } 293 294 if (!opts) { 295 tgt->crdt[0] = 0; 296 tgt->crdt[1] = 0; 297 tgt->crdt[2] = 0; 298 } else { 299 tgt->crdt[0] = opts->crdt[0]; 300 tgt->crdt[1] = opts->crdt[1]; 301 tgt->crdt[2] = opts->crdt[2]; 302 } 303 304 if (!opts) { 305 tgt->discovery_filter = SPDK_NVMF_TGT_DISCOVERY_MATCH_ANY; 306 } else { 307 tgt->discovery_filter = opts->discovery_filter; 308 } 309 310 tgt->discovery_genctr = 0; 311 TAILQ_INIT(&tgt->transports); 312 TAILQ_INIT(&tgt->poll_groups); 313 tgt->num_poll_groups = 0; 314 315 tgt->subsystem_ids = spdk_bit_array_create(tgt->max_subsystems); 316 if (tgt->subsystem_ids == NULL) { 317 free(tgt); 318 return NULL; 319 } 320 321 RB_INIT(&tgt->subsystems); 322 323 pthread_mutex_init(&tgt->mutex, NULL); 324 325 spdk_io_device_register(tgt, 326 nvmf_tgt_create_poll_group, 327 nvmf_tgt_destroy_poll_group, 328 sizeof(struct spdk_nvmf_poll_group), 329 tgt->name); 330 331 tgt->state = NVMF_TGT_RUNNING; 332 333 TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link); 334 335 return tgt; 336 } 337 338 static void 339 _nvmf_tgt_destroy_next_transport(void *ctx) 340 { 341 struct spdk_nvmf_tgt *tgt = ctx; 342 struct spdk_nvmf_transport *transport; 343 344 if (!TAILQ_EMPTY(&tgt->transports)) { 345 transport = TAILQ_FIRST(&tgt->transports); 346 TAILQ_REMOVE(&tgt->transports, transport, link); 347 spdk_nvmf_transport_destroy(transport, _nvmf_tgt_destroy_next_transport, tgt); 348 } else { 349 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn = tgt->destroy_cb_fn; 350 void *destroy_cb_arg = tgt->destroy_cb_arg; 351 352 pthread_mutex_destroy(&tgt->mutex); 353 free(tgt); 354 355 if (destroy_cb_fn) { 356 destroy_cb_fn(destroy_cb_arg, 0); 357 } 358 } 359 } 360 361 static void 362 nvmf_tgt_destroy_cb(void *io_device) 363 { 364 struct spdk_nvmf_tgt *tgt = io_device; 365 struct spdk_nvmf_subsystem *subsystem, *subsystem_next; 366 int rc; 367 368 /* We will be freeing subsystems in this loop, so we always need to get the next one 369 * ahead of time, since we can't call get_next() on a subsystem that's been freed. 370 */ 371 for (subsystem = spdk_nvmf_subsystem_get_first(tgt), 372 subsystem_next = spdk_nvmf_subsystem_get_next(subsystem); 373 subsystem != NULL; 374 subsystem = subsystem_next, 375 subsystem_next = spdk_nvmf_subsystem_get_next(subsystem_next)) { 376 nvmf_subsystem_remove_all_listeners(subsystem, true); 377 378 rc = spdk_nvmf_subsystem_destroy(subsystem, nvmf_tgt_destroy_cb, tgt); 379 if (rc) { 380 if (rc == -EINPROGRESS) { 381 /* If rc is -EINPROGRESS, nvmf_tgt_destroy_cb will be called again when subsystem #i 382 * is destroyed, nvmf_tgt_destroy_cb will continue to destroy other subsystems if any */ 383 return; 384 } else { 385 SPDK_ERRLOG("Failed to destroy subsystem %s, rc %d\n", subsystem->subnqn, rc); 386 } 387 } 388 } 389 spdk_bit_array_free(&tgt->subsystem_ids); 390 _nvmf_tgt_destroy_next_transport(tgt); 391 } 392 393 void 394 spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt, 395 spdk_nvmf_tgt_destroy_done_fn cb_fn, 396 void *cb_arg) 397 { 398 assert(!(tgt->state == NVMF_TGT_PAUSING || tgt->state == NVMF_TGT_RESUMING)); 399 400 tgt->destroy_cb_fn = cb_fn; 401 tgt->destroy_cb_arg = cb_arg; 402 403 TAILQ_REMOVE(&g_nvmf_tgts, tgt, link); 404 405 spdk_io_device_unregister(tgt, nvmf_tgt_destroy_cb); 406 } 407 408 const char * 409 spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt) 410 { 411 return tgt->name; 412 } 413 414 struct spdk_nvmf_tgt * 415 spdk_nvmf_get_tgt(const char *name) 416 { 417 struct spdk_nvmf_tgt *tgt; 418 uint32_t num_targets = 0; 419 420 TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) { 421 if (name) { 422 if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) { 423 return tgt; 424 } 425 } 426 num_targets++; 427 } 428 429 /* 430 * special case. If there is only one target and 431 * no name was specified, return the only available 432 * target. If there is more than one target, name must 433 * be specified. 434 */ 435 if (!name && num_targets == 1) { 436 return TAILQ_FIRST(&g_nvmf_tgts); 437 } 438 439 return NULL; 440 } 441 442 struct spdk_nvmf_tgt * 443 spdk_nvmf_get_first_tgt(void) 444 { 445 return TAILQ_FIRST(&g_nvmf_tgts); 446 } 447 448 struct spdk_nvmf_tgt * 449 spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev) 450 { 451 return TAILQ_NEXT(prev, link); 452 } 453 454 static void 455 nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w, 456 struct spdk_nvmf_subsystem *subsystem) 457 { 458 struct spdk_nvmf_host *host; 459 struct spdk_nvmf_subsystem_listener *listener; 460 const struct spdk_nvme_transport_id *trid; 461 struct spdk_nvmf_ns *ns; 462 struct spdk_nvmf_ns_opts ns_opts; 463 uint32_t max_namespaces; 464 char uuid_str[SPDK_UUID_STRING_LEN]; 465 466 if (spdk_nvmf_subsystem_get_type(subsystem) != SPDK_NVMF_SUBTYPE_NVME) { 467 return; 468 } 469 470 /* { */ 471 spdk_json_write_object_begin(w); 472 spdk_json_write_named_string(w, "method", "nvmf_create_subsystem"); 473 474 /* "params" : { */ 475 spdk_json_write_named_object_begin(w, "params"); 476 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 477 spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem)); 478 spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem)); 479 spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem)); 480 481 max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem); 482 if (max_namespaces != 0) { 483 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces); 484 } 485 486 spdk_json_write_named_uint32(w, "min_cntlid", spdk_nvmf_subsystem_get_min_cntlid(subsystem)); 487 spdk_json_write_named_uint32(w, "max_cntlid", spdk_nvmf_subsystem_get_max_cntlid(subsystem)); 488 spdk_json_write_named_bool(w, "ana_reporting", nvmf_subsystem_get_ana_reporting(subsystem)); 489 490 /* } "params" */ 491 spdk_json_write_object_end(w); 492 493 /* } */ 494 spdk_json_write_object_end(w); 495 496 for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL; 497 host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) { 498 499 spdk_json_write_object_begin(w); 500 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host"); 501 502 /* "params" : { */ 503 spdk_json_write_named_object_begin(w, "params"); 504 505 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 506 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host)); 507 508 /* } "params" */ 509 spdk_json_write_object_end(w); 510 511 /* } */ 512 spdk_json_write_object_end(w); 513 } 514 515 for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL; 516 ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) { 517 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts)); 518 519 spdk_json_write_object_begin(w); 520 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns"); 521 522 /* "params" : { */ 523 spdk_json_write_named_object_begin(w, "params"); 524 525 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 526 527 /* "namespace" : { */ 528 spdk_json_write_named_object_begin(w, "namespace"); 529 530 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns)); 531 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns))); 532 533 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) { 534 SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch"); 535 spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]), 536 from_be64(&ns_opts.nguid[8])); 537 } 538 539 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) { 540 SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch"); 541 spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64)); 542 } 543 544 if (!spdk_uuid_is_null(&ns_opts.uuid)) { 545 spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &ns_opts.uuid); 546 spdk_json_write_named_string(w, "uuid", uuid_str); 547 } 548 549 if (nvmf_subsystem_get_ana_reporting(subsystem)) { 550 spdk_json_write_named_uint32(w, "anagrpid", ns_opts.anagrpid); 551 } 552 553 /* "namespace" */ 554 spdk_json_write_object_end(w); 555 556 /* } "params" */ 557 spdk_json_write_object_end(w); 558 559 /* } */ 560 spdk_json_write_object_end(w); 561 } 562 563 for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL; 564 listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) { 565 trid = spdk_nvmf_subsystem_listener_get_trid(listener); 566 567 spdk_json_write_object_begin(w); 568 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener"); 569 570 /* "params" : { */ 571 spdk_json_write_named_object_begin(w, "params"); 572 573 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 574 nvmf_transport_listen_dump_opts(listener->transport, trid, w); 575 spdk_json_write_named_bool(w, "secure_channel", listener->opts.secure_channel); 576 577 /* } "params" */ 578 spdk_json_write_object_end(w); 579 580 /* } */ 581 spdk_json_write_object_end(w); 582 } 583 584 } 585 586 void 587 spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt) 588 { 589 struct spdk_nvmf_subsystem *subsystem; 590 struct spdk_nvmf_transport *transport; 591 592 spdk_json_write_object_begin(w); 593 spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems"); 594 595 spdk_json_write_named_object_begin(w, "params"); 596 spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems); 597 spdk_json_write_object_end(w); 598 599 spdk_json_write_object_end(w); 600 601 spdk_json_write_object_begin(w); 602 spdk_json_write_named_string(w, "method", "nvmf_set_crdt"); 603 spdk_json_write_named_object_begin(w, "params"); 604 spdk_json_write_named_uint32(w, "crdt1", tgt->crdt[0]); 605 spdk_json_write_named_uint32(w, "crdt2", tgt->crdt[1]); 606 spdk_json_write_named_uint32(w, "crdt3", tgt->crdt[2]); 607 spdk_json_write_object_end(w); 608 spdk_json_write_object_end(w); 609 610 /* write transports */ 611 TAILQ_FOREACH(transport, &tgt->transports, link) { 612 spdk_json_write_object_begin(w); 613 spdk_json_write_named_string(w, "method", "nvmf_create_transport"); 614 nvmf_transport_dump_opts(transport, w, true); 615 spdk_json_write_object_end(w); 616 } 617 618 subsystem = spdk_nvmf_subsystem_get_first(tgt); 619 while (subsystem) { 620 nvmf_write_subsystem_config_json(w, subsystem); 621 subsystem = spdk_nvmf_subsystem_get_next(subsystem); 622 } 623 } 624 625 static void 626 nvmf_listen_opts_copy(struct spdk_nvmf_listen_opts *opts, 627 const struct spdk_nvmf_listen_opts *opts_src, size_t opts_size) 628 { 629 assert(opts); 630 assert(opts_src); 631 632 opts->opts_size = opts_size; 633 634 #define SET_FIELD(field) \ 635 if (offsetof(struct spdk_nvmf_listen_opts, field) + sizeof(opts->field) <= opts_size) { \ 636 opts->field = opts_src->field; \ 637 } \ 638 639 SET_FIELD(transport_specific); 640 SET_FIELD(secure_channel); 641 #undef SET_FIELD 642 643 /* Do not remove this statement, you should always update this statement when you adding a new field, 644 * and do not forget to add the SET_FIELD statement for your added field. */ 645 SPDK_STATIC_ASSERT(sizeof(struct spdk_nvmf_listen_opts) == 17, "Incorrect size"); 646 } 647 648 void 649 spdk_nvmf_listen_opts_init(struct spdk_nvmf_listen_opts *opts, size_t opts_size) 650 { 651 struct spdk_nvmf_listen_opts opts_local = {}; 652 653 /* local version of opts should have defaults set here */ 654 655 nvmf_listen_opts_copy(opts, &opts_local, opts_size); 656 } 657 658 int 659 spdk_nvmf_tgt_listen_ext(struct spdk_nvmf_tgt *tgt, const struct spdk_nvme_transport_id *trid, 660 struct spdk_nvmf_listen_opts *opts) 661 { 662 struct spdk_nvmf_transport *transport; 663 int rc; 664 struct spdk_nvmf_listen_opts opts_local = {}; 665 666 if (!opts) { 667 SPDK_ERRLOG("opts should not be NULL\n"); 668 return -EINVAL; 669 } 670 671 if (!opts->opts_size) { 672 SPDK_ERRLOG("The opts_size in opts structure should not be zero\n"); 673 return -EINVAL; 674 } 675 676 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 677 if (!transport) { 678 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n", 679 trid->trstring); 680 return -EINVAL; 681 } 682 683 nvmf_listen_opts_copy(&opts_local, opts, opts->opts_size); 684 rc = spdk_nvmf_transport_listen(transport, trid, &opts_local); 685 if (rc < 0) { 686 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr); 687 } 688 689 return rc; 690 } 691 692 int 693 spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt, 694 struct spdk_nvme_transport_id *trid) 695 { 696 struct spdk_nvmf_transport *transport; 697 int rc; 698 699 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 700 if (!transport) { 701 SPDK_ERRLOG("Unable to find %s transport. The transport must be created first also make sure it is properly registered.\n", 702 trid->trstring); 703 return -EINVAL; 704 } 705 706 rc = spdk_nvmf_transport_stop_listen(transport, trid); 707 if (rc < 0) { 708 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr); 709 return rc; 710 } 711 return 0; 712 } 713 714 struct spdk_nvmf_tgt_add_transport_ctx { 715 struct spdk_nvmf_tgt *tgt; 716 struct spdk_nvmf_transport *transport; 717 spdk_nvmf_tgt_add_transport_done_fn cb_fn; 718 void *cb_arg; 719 int status; 720 }; 721 722 static void 723 _nvmf_tgt_remove_transport_done(struct spdk_io_channel_iter *i, int status) 724 { 725 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 726 727 ctx->cb_fn(ctx->cb_arg, ctx->status); 728 free(ctx); 729 } 730 731 static void 732 _nvmf_tgt_remove_transport(struct spdk_io_channel_iter *i) 733 { 734 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 735 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 736 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 737 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 738 739 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 740 if (tgroup->transport == ctx->transport) { 741 TAILQ_REMOVE(&group->tgroups, tgroup, link); 742 nvmf_transport_poll_group_destroy(tgroup); 743 } 744 } 745 746 spdk_for_each_channel_continue(i, 0); 747 } 748 749 static void 750 _nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status) 751 { 752 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 753 754 if (status) { 755 ctx->status = status; 756 spdk_for_each_channel(ctx->tgt, 757 _nvmf_tgt_remove_transport, 758 ctx, 759 _nvmf_tgt_remove_transport_done); 760 return; 761 } 762 763 ctx->transport->tgt = ctx->tgt; 764 TAILQ_INSERT_TAIL(&ctx->tgt->transports, ctx->transport, link); 765 ctx->cb_fn(ctx->cb_arg, status); 766 free(ctx); 767 } 768 769 static void 770 _nvmf_tgt_add_transport(struct spdk_io_channel_iter *i) 771 { 772 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 773 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 774 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 775 int rc; 776 777 rc = nvmf_poll_group_add_transport(group, ctx->transport); 778 spdk_for_each_channel_continue(i, rc); 779 } 780 781 void 782 spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt, 783 struct spdk_nvmf_transport *transport, 784 spdk_nvmf_tgt_add_transport_done_fn cb_fn, 785 void *cb_arg) 786 { 787 struct spdk_nvmf_tgt_add_transport_ctx *ctx; 788 789 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_add_transport, transport, tgt->name); 790 791 if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) { 792 cb_fn(cb_arg, -EEXIST); 793 return; /* transport already created */ 794 } 795 796 ctx = calloc(1, sizeof(*ctx)); 797 if (!ctx) { 798 cb_fn(cb_arg, -ENOMEM); 799 return; 800 } 801 802 ctx->tgt = tgt; 803 ctx->transport = transport; 804 ctx->cb_fn = cb_fn; 805 ctx->cb_arg = cb_arg; 806 807 spdk_for_each_channel(tgt, 808 _nvmf_tgt_add_transport, 809 ctx, 810 _nvmf_tgt_add_transport_done); 811 } 812 813 struct nvmf_tgt_pause_ctx { 814 struct spdk_nvmf_tgt *tgt; 815 spdk_nvmf_tgt_pause_polling_cb_fn cb_fn; 816 void *cb_arg; 817 }; 818 819 static void 820 _nvmf_tgt_pause_polling_done(struct spdk_io_channel_iter *i, int status) 821 { 822 struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 823 824 ctx->tgt->state = NVMF_TGT_PAUSED; 825 826 ctx->cb_fn(ctx->cb_arg, status); 827 free(ctx); 828 } 829 830 static void 831 _nvmf_tgt_pause_polling(struct spdk_io_channel_iter *i) 832 { 833 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 834 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 835 836 spdk_poller_unregister(&group->poller); 837 838 spdk_for_each_channel_continue(i, 0); 839 } 840 841 int 842 spdk_nvmf_tgt_pause_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_pause_polling_cb_fn cb_fn, 843 void *cb_arg) 844 { 845 struct nvmf_tgt_pause_ctx *ctx; 846 847 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_pause_polling, tgt, tgt->name); 848 849 switch (tgt->state) { 850 case NVMF_TGT_PAUSING: 851 case NVMF_TGT_RESUMING: 852 return -EBUSY; 853 case NVMF_TGT_RUNNING: 854 break; 855 default: 856 return -EINVAL; 857 } 858 859 ctx = calloc(1, sizeof(*ctx)); 860 if (!ctx) { 861 return -ENOMEM; 862 } 863 864 865 tgt->state = NVMF_TGT_PAUSING; 866 867 ctx->tgt = tgt; 868 ctx->cb_fn = cb_fn; 869 ctx->cb_arg = cb_arg; 870 871 spdk_for_each_channel(tgt, 872 _nvmf_tgt_pause_polling, 873 ctx, 874 _nvmf_tgt_pause_polling_done); 875 return 0; 876 } 877 878 static void 879 _nvmf_tgt_resume_polling_done(struct spdk_io_channel_iter *i, int status) 880 { 881 struct nvmf_tgt_pause_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 882 883 ctx->tgt->state = NVMF_TGT_RUNNING; 884 885 ctx->cb_fn(ctx->cb_arg, status); 886 free(ctx); 887 } 888 889 static void 890 _nvmf_tgt_resume_polling(struct spdk_io_channel_iter *i) 891 { 892 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 893 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 894 895 assert(group->poller == NULL); 896 group->poller = SPDK_POLLER_REGISTER(nvmf_poll_group_poll, group, 0); 897 898 spdk_for_each_channel_continue(i, 0); 899 } 900 901 int 902 spdk_nvmf_tgt_resume_polling(struct spdk_nvmf_tgt *tgt, spdk_nvmf_tgt_resume_polling_cb_fn cb_fn, 903 void *cb_arg) 904 { 905 struct nvmf_tgt_pause_ctx *ctx; 906 907 SPDK_DTRACE_PROBE2_TICKS(nvmf_tgt_resume_polling, tgt, tgt->name); 908 909 switch (tgt->state) { 910 case NVMF_TGT_PAUSING: 911 case NVMF_TGT_RESUMING: 912 return -EBUSY; 913 case NVMF_TGT_PAUSED: 914 break; 915 default: 916 return -EINVAL; 917 } 918 919 ctx = calloc(1, sizeof(*ctx)); 920 if (!ctx) { 921 return -ENOMEM; 922 } 923 924 tgt->state = NVMF_TGT_RESUMING; 925 926 ctx->tgt = tgt; 927 ctx->cb_fn = cb_fn; 928 ctx->cb_arg = cb_arg; 929 930 spdk_for_each_channel(tgt, 931 _nvmf_tgt_resume_polling, 932 ctx, 933 _nvmf_tgt_resume_polling_done); 934 return 0; 935 } 936 937 struct spdk_nvmf_subsystem * 938 spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn) 939 { 940 struct spdk_nvmf_subsystem subsystem; 941 942 if (!subnqn) { 943 return NULL; 944 } 945 946 /* Ensure that subnqn is null terminated */ 947 if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) { 948 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n"); 949 return NULL; 950 } 951 952 snprintf(subsystem.subnqn, sizeof(subsystem.subnqn), "%s", subnqn); 953 return RB_FIND(subsystem_tree, &tgt->subsystems, &subsystem); 954 } 955 956 struct spdk_nvmf_transport * 957 spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name) 958 { 959 struct spdk_nvmf_transport *transport; 960 961 TAILQ_FOREACH(transport, &tgt->transports, link) { 962 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) { 963 return transport; 964 } 965 } 966 return NULL; 967 } 968 969 struct nvmf_new_qpair_ctx { 970 struct spdk_nvmf_qpair *qpair; 971 struct spdk_nvmf_poll_group *group; 972 }; 973 974 static void 975 _nvmf_poll_group_add(void *_ctx) 976 { 977 struct nvmf_new_qpair_ctx *ctx = _ctx; 978 struct spdk_nvmf_qpair *qpair = ctx->qpair; 979 struct spdk_nvmf_poll_group *group = ctx->group; 980 981 free(_ctx); 982 983 if (spdk_nvmf_poll_group_add(group, qpair) != 0) { 984 SPDK_ERRLOG("Unable to add the qpair to a poll group.\n"); 985 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 986 } 987 } 988 989 void 990 spdk_nvmf_tgt_new_qpair(struct spdk_nvmf_tgt *tgt, struct spdk_nvmf_qpair *qpair) 991 { 992 struct spdk_nvmf_poll_group *group; 993 struct nvmf_new_qpair_ctx *ctx; 994 995 group = spdk_nvmf_get_optimal_poll_group(qpair); 996 if (group == NULL) { 997 if (tgt->next_poll_group == NULL) { 998 tgt->next_poll_group = TAILQ_FIRST(&tgt->poll_groups); 999 if (tgt->next_poll_group == NULL) { 1000 SPDK_ERRLOG("No poll groups exist.\n"); 1001 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1002 return; 1003 } 1004 } 1005 group = tgt->next_poll_group; 1006 tgt->next_poll_group = TAILQ_NEXT(group, link); 1007 } 1008 1009 ctx = calloc(1, sizeof(*ctx)); 1010 if (!ctx) { 1011 SPDK_ERRLOG("Unable to send message to poll group.\n"); 1012 spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1013 return; 1014 } 1015 1016 ctx->qpair = qpair; 1017 ctx->group = group; 1018 1019 pthread_mutex_lock(&group->mutex); 1020 group->current_unassociated_qpairs++; 1021 pthread_mutex_unlock(&group->mutex); 1022 1023 spdk_thread_send_msg(group->thread, _nvmf_poll_group_add, ctx); 1024 } 1025 1026 struct spdk_nvmf_poll_group * 1027 spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt) 1028 { 1029 struct spdk_io_channel *ch; 1030 1031 ch = spdk_get_io_channel(tgt); 1032 if (!ch) { 1033 SPDK_ERRLOG("Unable to get I/O channel for target\n"); 1034 return NULL; 1035 } 1036 1037 return spdk_io_channel_get_ctx(ch); 1038 } 1039 1040 void 1041 spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group, 1042 spdk_nvmf_poll_group_destroy_done_fn cb_fn, 1043 void *cb_arg) 1044 { 1045 assert(group->destroy_cb_fn == NULL); 1046 group->destroy_cb_fn = cb_fn; 1047 group->destroy_cb_arg = cb_arg; 1048 1049 /* This function will put the io_channel associated with this poll group */ 1050 nvmf_tgt_destroy_poll_group_qpairs(group); 1051 } 1052 1053 int 1054 spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group, 1055 struct spdk_nvmf_qpair *qpair) 1056 { 1057 int rc = -1; 1058 struct spdk_nvmf_transport_poll_group *tgroup; 1059 1060 TAILQ_INIT(&qpair->outstanding); 1061 qpair->group = group; 1062 qpair->ctrlr = NULL; 1063 qpair->disconnect_started = false; 1064 1065 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 1066 if (tgroup->transport == qpair->transport) { 1067 rc = nvmf_transport_poll_group_add(tgroup, qpair); 1068 break; 1069 } 1070 } 1071 1072 /* We add the qpair to the group only it is successfully added into the tgroup */ 1073 if (rc == 0) { 1074 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_qpair, qpair, spdk_thread_get_id(group->thread)); 1075 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link); 1076 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE); 1077 } 1078 1079 return rc; 1080 } 1081 1082 static void 1083 _nvmf_ctrlr_destruct(void *ctx) 1084 { 1085 struct spdk_nvmf_ctrlr *ctrlr = ctx; 1086 1087 nvmf_ctrlr_destruct(ctrlr); 1088 } 1089 1090 static void 1091 _nvmf_ctrlr_free_from_qpair(void *ctx) 1092 { 1093 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1094 struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr; 1095 uint32_t count; 1096 1097 spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid); 1098 count = spdk_bit_array_count_set(ctrlr->qpair_mask); 1099 if (count == 0) { 1100 assert(!ctrlr->in_destruct); 1101 SPDK_DEBUGLOG(nvmf, "Last qpair %u, destroy ctrlr 0x%hx\n", qpair_ctx->qid, ctrlr->cntlid); 1102 ctrlr->in_destruct = true; 1103 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr); 1104 } 1105 free(qpair_ctx); 1106 } 1107 1108 static void 1109 _nvmf_transport_qpair_fini_complete(void *cb_ctx) 1110 { 1111 struct nvmf_qpair_disconnect_ctx *qpair_ctx = cb_ctx; 1112 struct spdk_nvmf_ctrlr *ctrlr; 1113 /* Store cb args since cb_ctx can be freed in _nvmf_ctrlr_free_from_qpair */ 1114 nvmf_qpair_disconnect_cb cb_fn = qpair_ctx->cb_fn; 1115 void *cb_arg = qpair_ctx->ctx; 1116 struct spdk_thread *cb_thread = qpair_ctx->thread; 1117 1118 ctrlr = qpair_ctx->ctrlr; 1119 SPDK_DEBUGLOG(nvmf, "Finish destroying qid %u\n", qpair_ctx->qid); 1120 1121 if (ctrlr) { 1122 if (qpair_ctx->qid == 0) { 1123 /* Admin qpair is removed, so set the pointer to NULL. 1124 * This operation is safe since we are on ctrlr thread now, admin qpair's thread is the same 1125 * as controller's thread */ 1126 assert(ctrlr->thread == spdk_get_thread()); 1127 ctrlr->admin_qpair = NULL; 1128 } 1129 /* Free qpair id from controller's bit mask and destroy the controller if it is the last qpair */ 1130 if (ctrlr->thread) { 1131 spdk_thread_send_msg(ctrlr->thread, _nvmf_ctrlr_free_from_qpair, qpair_ctx); 1132 } else { 1133 _nvmf_ctrlr_free_from_qpair(qpair_ctx); 1134 } 1135 } else { 1136 free(qpair_ctx); 1137 } 1138 1139 if (cb_fn) { 1140 spdk_thread_send_msg(cb_thread, cb_fn, cb_arg); 1141 } 1142 } 1143 1144 void 1145 spdk_nvmf_poll_group_remove(struct spdk_nvmf_qpair *qpair) 1146 { 1147 struct spdk_nvmf_transport_poll_group *tgroup; 1148 int rc; 1149 1150 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_remove_qpair, qpair, 1151 spdk_thread_get_id(qpair->group->thread)); 1152 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR); 1153 1154 /* Find the tgroup and remove the qpair from the tgroup */ 1155 TAILQ_FOREACH(tgroup, &qpair->group->tgroups, link) { 1156 if (tgroup->transport == qpair->transport) { 1157 rc = nvmf_transport_poll_group_remove(tgroup, qpair); 1158 if (rc && (rc != ENOTSUP)) { 1159 SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n", 1160 qpair, tgroup); 1161 } 1162 break; 1163 } 1164 } 1165 1166 TAILQ_REMOVE(&qpair->group->qpairs, qpair, link); 1167 qpair->group = NULL; 1168 } 1169 1170 static void 1171 _nvmf_qpair_sgroup_req_clean(struct spdk_nvmf_subsystem_poll_group *sgroup, 1172 const struct spdk_nvmf_qpair *qpair) 1173 { 1174 struct spdk_nvmf_request *req, *tmp; 1175 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1176 if (req->qpair == qpair) { 1177 TAILQ_REMOVE(&sgroup->queued, req, link); 1178 if (nvmf_transport_req_free(req)) { 1179 SPDK_ERRLOG("Transport request free error!\n"); 1180 } 1181 } 1182 } 1183 } 1184 1185 static void 1186 _nvmf_qpair_destroy(void *ctx, int status) 1187 { 1188 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1189 struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair; 1190 struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; 1191 struct spdk_nvmf_subsystem_poll_group *sgroup; 1192 uint32_t sid; 1193 1194 assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING); 1195 qpair_ctx->qid = qpair->qid; 1196 1197 if (qpair->connect_received) { 1198 if (0 == qpair->qid) { 1199 assert(qpair->group->stat.current_admin_qpairs > 0); 1200 qpair->group->stat.current_admin_qpairs--; 1201 } else { 1202 assert(qpair->group->stat.current_io_qpairs > 0); 1203 qpair->group->stat.current_io_qpairs--; 1204 } 1205 } else { 1206 pthread_mutex_lock(&qpair->group->mutex); 1207 qpair->group->current_unassociated_qpairs--; 1208 pthread_mutex_unlock(&qpair->group->mutex); 1209 } 1210 1211 if (ctrlr) { 1212 sgroup = &qpair->group->sgroups[ctrlr->subsys->id]; 1213 _nvmf_qpair_sgroup_req_clean(sgroup, qpair); 1214 } else { 1215 for (sid = 0; sid < qpair->group->num_sgroups; sid++) { 1216 sgroup = &qpair->group->sgroups[sid]; 1217 assert(sgroup != NULL); 1218 _nvmf_qpair_sgroup_req_clean(sgroup, qpair); 1219 } 1220 } 1221 1222 qpair_ctx->ctrlr = ctrlr; 1223 spdk_nvmf_poll_group_remove(qpair); 1224 nvmf_transport_qpair_fini(qpair, _nvmf_transport_qpair_fini_complete, qpair_ctx); 1225 } 1226 1227 static void 1228 _nvmf_qpair_disconnect_msg(void *ctx) 1229 { 1230 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 1231 1232 spdk_nvmf_qpair_disconnect(qpair_ctx->qpair, qpair_ctx->cb_fn, qpair_ctx->ctx); 1233 free(ctx); 1234 } 1235 1236 SPDK_LOG_DEPRECATION_REGISTER(spdk_nvmf_qpair_disconnect, "cb_fn and ctx are deprecated", "v23.09", 1237 0); 1238 1239 int 1240 spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx) 1241 { 1242 struct spdk_nvmf_poll_group *group = qpair->group; 1243 struct nvmf_qpair_disconnect_ctx *qpair_ctx; 1244 1245 if (__atomic_test_and_set(&qpair->disconnect_started, __ATOMIC_RELAXED)) { 1246 return -EINPROGRESS; 1247 } 1248 1249 if (cb_fn || ctx) { 1250 SPDK_LOG_DEPRECATED(spdk_nvmf_qpair_disconnect); 1251 } 1252 1253 /* If we get a qpair in the uninitialized state, we can just destroy it immediately */ 1254 if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) { 1255 nvmf_transport_qpair_fini(qpair, NULL, NULL); 1256 if (cb_fn) { 1257 cb_fn(ctx); 1258 } 1259 return 0; 1260 } 1261 1262 assert(group != NULL); 1263 if (spdk_get_thread() != group->thread) { 1264 /* clear the atomic so we can set it on the next call on the proper thread. */ 1265 __atomic_clear(&qpair->disconnect_started, __ATOMIC_RELAXED); 1266 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 1267 if (!qpair_ctx) { 1268 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1269 return -ENOMEM; 1270 } 1271 qpair_ctx->qpair = qpair; 1272 qpair_ctx->cb_fn = cb_fn; 1273 qpair_ctx->thread = group->thread; 1274 qpair_ctx->ctx = ctx; 1275 spdk_thread_send_msg(group->thread, _nvmf_qpair_disconnect_msg, qpair_ctx); 1276 return 0; 1277 } 1278 1279 SPDK_DTRACE_PROBE2_TICKS(nvmf_qpair_disconnect, qpair, spdk_thread_get_id(group->thread)); 1280 assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE); 1281 nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING); 1282 1283 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 1284 if (!qpair_ctx) { 1285 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 1286 return -ENOMEM; 1287 } 1288 1289 qpair_ctx->qpair = qpair; 1290 qpair_ctx->cb_fn = cb_fn; 1291 qpair_ctx->thread = group->thread; 1292 qpair_ctx->ctx = ctx; 1293 1294 /* Check for outstanding I/O */ 1295 if (!TAILQ_EMPTY(&qpair->outstanding)) { 1296 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_drain_qpair, qpair, spdk_thread_get_id(group->thread)); 1297 qpair->state_cb = _nvmf_qpair_destroy; 1298 qpair->state_cb_arg = qpair_ctx; 1299 nvmf_qpair_abort_pending_zcopy_reqs(qpair); 1300 nvmf_qpair_free_aer(qpair); 1301 return 0; 1302 } 1303 1304 _nvmf_qpair_destroy(qpair_ctx, 0); 1305 1306 return 0; 1307 } 1308 1309 int 1310 spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair, 1311 struct spdk_nvme_transport_id *trid) 1312 { 1313 memset(trid, 0, sizeof(*trid)); 1314 return nvmf_transport_qpair_get_peer_trid(qpair, trid); 1315 } 1316 1317 int 1318 spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair, 1319 struct spdk_nvme_transport_id *trid) 1320 { 1321 memset(trid, 0, sizeof(*trid)); 1322 return nvmf_transport_qpair_get_local_trid(qpair, trid); 1323 } 1324 1325 int 1326 spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair, 1327 struct spdk_nvme_transport_id *trid) 1328 { 1329 memset(trid, 0, sizeof(*trid)); 1330 return nvmf_transport_qpair_get_listen_trid(qpair, trid); 1331 } 1332 1333 static int 1334 poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1335 struct spdk_nvmf_subsystem *subsystem) 1336 { 1337 struct spdk_nvmf_subsystem_poll_group *sgroup; 1338 uint32_t new_num_ns, old_num_ns; 1339 uint32_t i, j; 1340 struct spdk_nvmf_ns *ns; 1341 struct spdk_nvmf_registrant *reg, *tmp; 1342 struct spdk_io_channel *ch; 1343 struct spdk_nvmf_subsystem_pg_ns_info *ns_info; 1344 struct spdk_nvmf_ctrlr *ctrlr; 1345 bool ns_changed; 1346 1347 /* Make sure our poll group has memory for this subsystem allocated */ 1348 if (subsystem->id >= group->num_sgroups) { 1349 return -ENOMEM; 1350 } 1351 1352 sgroup = &group->sgroups[subsystem->id]; 1353 1354 /* Make sure the array of namespace information is the correct size */ 1355 new_num_ns = subsystem->max_nsid; 1356 old_num_ns = sgroup->num_ns; 1357 1358 ns_changed = false; 1359 1360 if (old_num_ns == 0) { 1361 if (new_num_ns > 0) { 1362 /* First allocation */ 1363 sgroup->ns_info = calloc(new_num_ns, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1364 if (!sgroup->ns_info) { 1365 return -ENOMEM; 1366 } 1367 } 1368 } else if (new_num_ns > old_num_ns) { 1369 void *buf; 1370 1371 /* Make the array larger */ 1372 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1373 if (!buf) { 1374 return -ENOMEM; 1375 } 1376 1377 sgroup->ns_info = buf; 1378 1379 /* Null out the new namespace information slots */ 1380 for (i = old_num_ns; i < new_num_ns; i++) { 1381 memset(&sgroup->ns_info[i], 0, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1382 } 1383 } else if (new_num_ns < old_num_ns) { 1384 void *buf; 1385 1386 /* Free the extra I/O channels */ 1387 for (i = new_num_ns; i < old_num_ns; i++) { 1388 ns_info = &sgroup->ns_info[i]; 1389 1390 if (ns_info->channel) { 1391 spdk_put_io_channel(ns_info->channel); 1392 ns_info->channel = NULL; 1393 } 1394 } 1395 1396 /* Make the array smaller */ 1397 if (new_num_ns > 0) { 1398 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1399 if (!buf) { 1400 return -ENOMEM; 1401 } 1402 sgroup->ns_info = buf; 1403 } else { 1404 free(sgroup->ns_info); 1405 sgroup->ns_info = NULL; 1406 } 1407 } 1408 1409 sgroup->num_ns = new_num_ns; 1410 1411 /* Detect bdevs that were added or removed */ 1412 for (i = 0; i < sgroup->num_ns; i++) { 1413 ns = subsystem->ns[i]; 1414 ns_info = &sgroup->ns_info[i]; 1415 ch = ns_info->channel; 1416 1417 if (ns == NULL && ch == NULL) { 1418 /* Both NULL. Leave empty */ 1419 } else if (ns == NULL && ch != NULL) { 1420 /* There was a channel here, but the namespace is gone. */ 1421 ns_changed = true; 1422 spdk_put_io_channel(ch); 1423 ns_info->channel = NULL; 1424 } else if (ns != NULL && ch == NULL) { 1425 /* A namespace appeared but there is no channel yet */ 1426 ns_changed = true; 1427 ch = spdk_bdev_get_io_channel(ns->desc); 1428 if (ch == NULL) { 1429 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1430 return -ENOMEM; 1431 } 1432 ns_info->channel = ch; 1433 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) { 1434 /* A namespace was here before, but was replaced by a new one. */ 1435 ns_changed = true; 1436 spdk_put_io_channel(ns_info->channel); 1437 memset(ns_info, 0, sizeof(*ns_info)); 1438 1439 ch = spdk_bdev_get_io_channel(ns->desc); 1440 if (ch == NULL) { 1441 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1442 return -ENOMEM; 1443 } 1444 ns_info->channel = ch; 1445 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) { 1446 /* Namespace is still there but size has changed */ 1447 SPDK_DEBUGLOG(nvmf, "Namespace resized: subsystem_id %u," 1448 " nsid %u, pg %p, old %" PRIu64 ", new %" PRIu64 "\n", 1449 subsystem->id, 1450 ns->nsid, 1451 group, 1452 ns_info->num_blocks, 1453 spdk_bdev_get_num_blocks(ns->bdev)); 1454 ns_changed = true; 1455 } 1456 1457 if (ns == NULL) { 1458 memset(ns_info, 0, sizeof(*ns_info)); 1459 } else { 1460 ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev); 1461 ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev); 1462 ns_info->crkey = ns->crkey; 1463 ns_info->rtype = ns->rtype; 1464 if (ns->holder) { 1465 ns_info->holder_id = ns->holder->hostid; 1466 } 1467 1468 memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid)); 1469 j = 0; 1470 TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) { 1471 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) { 1472 SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS); 1473 return -EINVAL; 1474 } 1475 ns_info->reg_hostid[j++] = reg->hostid; 1476 } 1477 } 1478 } 1479 1480 if (ns_changed) { 1481 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) { 1482 if (ctrlr->thread != spdk_get_thread()) { 1483 continue; 1484 } 1485 /* It is possible that a ctrlr was added but the admin_qpair hasn't been 1486 * assigned yet. 1487 */ 1488 if (!ctrlr->admin_qpair) { 1489 continue; 1490 } 1491 if (ctrlr->admin_qpair->group == group) { 1492 nvmf_ctrlr_async_event_ns_notice(ctrlr); 1493 nvmf_ctrlr_async_event_ana_change_notice(ctrlr); 1494 } 1495 } 1496 } 1497 1498 return 0; 1499 } 1500 1501 int 1502 nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1503 struct spdk_nvmf_subsystem *subsystem) 1504 { 1505 return poll_group_update_subsystem(group, subsystem); 1506 } 1507 1508 int 1509 nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group, 1510 struct spdk_nvmf_subsystem *subsystem, 1511 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1512 { 1513 int rc = 0; 1514 struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id]; 1515 uint32_t i; 1516 1517 TAILQ_INIT(&sgroup->queued); 1518 1519 rc = poll_group_update_subsystem(group, subsystem); 1520 if (rc) { 1521 nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL); 1522 goto fini; 1523 } 1524 1525 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1526 1527 for (i = 0; i < sgroup->num_ns; i++) { 1528 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1529 } 1530 1531 fini: 1532 if (cb_fn) { 1533 cb_fn(cb_arg, rc); 1534 } 1535 1536 SPDK_DTRACE_PROBE2_TICKS(nvmf_poll_group_add_subsystem, spdk_thread_get_id(group->thread), 1537 subsystem->subnqn); 1538 1539 return rc; 1540 } 1541 1542 static void 1543 _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status) 1544 { 1545 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1546 struct spdk_nvmf_subsystem *subsystem; 1547 struct spdk_nvmf_poll_group *group; 1548 struct spdk_nvmf_subsystem_poll_group *sgroup; 1549 spdk_nvmf_poll_group_mod_done cpl_fn = NULL; 1550 void *cpl_ctx = NULL; 1551 uint32_t nsid; 1552 1553 group = qpair_ctx->group; 1554 subsystem = qpair_ctx->subsystem; 1555 cpl_fn = qpair_ctx->cpl_fn; 1556 cpl_ctx = qpair_ctx->cpl_ctx; 1557 sgroup = &group->sgroups[subsystem->id]; 1558 1559 if (status) { 1560 goto fini; 1561 } 1562 1563 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 1564 if (sgroup->ns_info[nsid].channel) { 1565 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 1566 sgroup->ns_info[nsid].channel = NULL; 1567 } 1568 } 1569 1570 sgroup->num_ns = 0; 1571 free(sgroup->ns_info); 1572 sgroup->ns_info = NULL; 1573 fini: 1574 free(qpair_ctx); 1575 if (cpl_fn) { 1576 cpl_fn(cpl_ctx, status); 1577 } 1578 } 1579 1580 static void nvmf_poll_group_remove_subsystem_msg(void *ctx); 1581 1582 static void 1583 nvmf_poll_group_remove_subsystem_msg(void *ctx) 1584 { 1585 struct spdk_nvmf_qpair *qpair, *qpair_tmp; 1586 struct spdk_nvmf_subsystem *subsystem; 1587 struct spdk_nvmf_poll_group *group; 1588 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1589 bool qpairs_found = false; 1590 int rc = 0; 1591 1592 group = qpair_ctx->group; 1593 subsystem = qpair_ctx->subsystem; 1594 1595 TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, qpair_tmp) { 1596 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1597 qpairs_found = true; 1598 rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL); 1599 if (rc && rc != -EINPROGRESS) { 1600 break; 1601 } 1602 } 1603 } 1604 1605 if (!qpairs_found) { 1606 _nvmf_poll_group_remove_subsystem_cb(ctx, 0); 1607 return; 1608 } 1609 1610 /* Some qpairs are in process of being disconnected. Send a message and try to remove them again */ 1611 spdk_thread_send_msg(spdk_get_thread(), nvmf_poll_group_remove_subsystem_msg, ctx); 1612 } 1613 1614 void 1615 nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group, 1616 struct spdk_nvmf_subsystem *subsystem, 1617 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1618 { 1619 struct spdk_nvmf_subsystem_poll_group *sgroup; 1620 struct nvmf_qpair_disconnect_many_ctx *ctx; 1621 uint32_t i; 1622 1623 SPDK_DTRACE_PROBE3_TICKS(nvmf_poll_group_remove_subsystem, group, spdk_thread_get_id(group->thread), 1624 subsystem->subnqn); 1625 1626 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 1627 if (!ctx) { 1628 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n"); 1629 if (cb_fn) { 1630 cb_fn(cb_arg, -1); 1631 } 1632 return; 1633 } 1634 1635 ctx->group = group; 1636 ctx->subsystem = subsystem; 1637 ctx->cpl_fn = cb_fn; 1638 ctx->cpl_ctx = cb_arg; 1639 1640 sgroup = &group->sgroups[subsystem->id]; 1641 sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1642 1643 for (i = 0; i < sgroup->num_ns; i++) { 1644 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1645 } 1646 1647 nvmf_poll_group_remove_subsystem_msg(ctx); 1648 } 1649 1650 void 1651 nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group, 1652 struct spdk_nvmf_subsystem *subsystem, 1653 uint32_t nsid, 1654 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1655 { 1656 struct spdk_nvmf_subsystem_poll_group *sgroup; 1657 struct spdk_nvmf_subsystem_pg_ns_info *ns_info = NULL; 1658 int rc = 0; 1659 uint32_t i; 1660 1661 if (subsystem->id >= group->num_sgroups) { 1662 rc = -1; 1663 goto fini; 1664 } 1665 1666 sgroup = &group->sgroups[subsystem->id]; 1667 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED) { 1668 goto fini; 1669 } 1670 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1671 1672 if (nsid == SPDK_NVME_GLOBAL_NS_TAG) { 1673 for (i = 0; i < sgroup->num_ns; i++) { 1674 ns_info = &sgroup->ns_info[i]; 1675 ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1676 } 1677 } else { 1678 /* NOTE: This implicitly also checks for 0, since 0 - 1 wraps around to UINT32_MAX. */ 1679 if (nsid - 1 < sgroup->num_ns) { 1680 ns_info = &sgroup->ns_info[nsid - 1]; 1681 ns_info->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1682 } 1683 } 1684 1685 if (sgroup->mgmt_io_outstanding > 0) { 1686 assert(sgroup->cb_fn == NULL); 1687 sgroup->cb_fn = cb_fn; 1688 assert(sgroup->cb_arg == NULL); 1689 sgroup->cb_arg = cb_arg; 1690 return; 1691 } 1692 1693 if (nsid == SPDK_NVME_GLOBAL_NS_TAG) { 1694 for (i = 0; i < sgroup->num_ns; i++) { 1695 ns_info = &sgroup->ns_info[i]; 1696 1697 if (ns_info->io_outstanding > 0) { 1698 assert(sgroup->cb_fn == NULL); 1699 sgroup->cb_fn = cb_fn; 1700 assert(sgroup->cb_arg == NULL); 1701 sgroup->cb_arg = cb_arg; 1702 return; 1703 } 1704 } 1705 } else { 1706 if (ns_info != NULL && ns_info->io_outstanding > 0) { 1707 assert(sgroup->cb_fn == NULL); 1708 sgroup->cb_fn = cb_fn; 1709 assert(sgroup->cb_arg == NULL); 1710 sgroup->cb_arg = cb_arg; 1711 return; 1712 } 1713 } 1714 1715 assert(sgroup->mgmt_io_outstanding == 0); 1716 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED; 1717 fini: 1718 if (cb_fn) { 1719 cb_fn(cb_arg, rc); 1720 } 1721 } 1722 1723 void 1724 nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group, 1725 struct spdk_nvmf_subsystem *subsystem, 1726 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1727 { 1728 struct spdk_nvmf_request *req, *tmp; 1729 struct spdk_nvmf_subsystem_poll_group *sgroup; 1730 int rc = 0; 1731 uint32_t i; 1732 1733 if (subsystem->id >= group->num_sgroups) { 1734 rc = -1; 1735 goto fini; 1736 } 1737 1738 sgroup = &group->sgroups[subsystem->id]; 1739 1740 if (sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE) { 1741 goto fini; 1742 } 1743 1744 rc = poll_group_update_subsystem(group, subsystem); 1745 if (rc) { 1746 goto fini; 1747 } 1748 1749 for (i = 0; i < sgroup->num_ns; i++) { 1750 sgroup->ns_info[i].state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1751 } 1752 1753 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1754 1755 /* Release all queued requests */ 1756 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1757 TAILQ_REMOVE(&sgroup->queued, req, link); 1758 if (spdk_nvmf_request_using_zcopy(req)) { 1759 spdk_nvmf_request_zcopy_start(req); 1760 } else { 1761 spdk_nvmf_request_exec(req); 1762 } 1763 1764 } 1765 fini: 1766 if (cb_fn) { 1767 cb_fn(cb_arg, rc); 1768 } 1769 } 1770 1771 1772 struct spdk_nvmf_poll_group * 1773 spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair) 1774 { 1775 struct spdk_nvmf_transport_poll_group *tgroup; 1776 1777 tgroup = nvmf_transport_get_optimal_poll_group(qpair->transport, qpair); 1778 1779 if (tgroup == NULL) { 1780 return NULL; 1781 } 1782 1783 return tgroup->group; 1784 } 1785 1786 void 1787 spdk_nvmf_poll_group_dump_stat(struct spdk_nvmf_poll_group *group, struct spdk_json_write_ctx *w) 1788 { 1789 struct spdk_nvmf_transport_poll_group *tgroup; 1790 1791 spdk_json_write_object_begin(w); 1792 1793 spdk_json_write_named_string(w, "name", spdk_thread_get_name(spdk_get_thread())); 1794 spdk_json_write_named_uint32(w, "admin_qpairs", group->stat.admin_qpairs); 1795 spdk_json_write_named_uint32(w, "io_qpairs", group->stat.io_qpairs); 1796 spdk_json_write_named_uint32(w, "current_admin_qpairs", group->stat.current_admin_qpairs); 1797 spdk_json_write_named_uint32(w, "current_io_qpairs", group->stat.current_io_qpairs); 1798 spdk_json_write_named_uint64(w, "pending_bdev_io", group->stat.pending_bdev_io); 1799 spdk_json_write_named_uint64(w, "completed_nvme_io", group->stat.completed_nvme_io); 1800 1801 spdk_json_write_named_array_begin(w, "transports"); 1802 1803 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 1804 spdk_json_write_object_begin(w); 1805 /* 1806 * The trtype field intentionally contains a transport name as this is more informative. 1807 * The field has not been renamed for backward compatibility. 1808 */ 1809 spdk_json_write_named_string(w, "trtype", spdk_nvmf_get_transport_name(tgroup->transport)); 1810 1811 if (tgroup->transport->ops->poll_group_dump_stat) { 1812 tgroup->transport->ops->poll_group_dump_stat(tgroup, w); 1813 } 1814 1815 spdk_json_write_object_end(w); 1816 } 1817 1818 spdk_json_write_array_end(w); 1819 spdk_json_write_object_end(w); 1820 } 1821