1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. All rights reserved. 5 * Copyright (c) 2018-2019 Mellanox Technologies LTD. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "spdk/stdinc.h" 35 36 #include "spdk/bdev.h" 37 #include "spdk/bit_array.h" 38 #include "spdk/conf.h" 39 #include "spdk/thread.h" 40 #include "spdk/nvmf.h" 41 #include "spdk/trace.h" 42 #include "spdk/endian.h" 43 #include "spdk/string.h" 44 45 #include "spdk_internal/log.h" 46 47 #include "nvmf_internal.h" 48 #include "transport.h" 49 50 SPDK_LOG_REGISTER_COMPONENT("nvmf", SPDK_LOG_NVMF) 51 52 #define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024 53 54 static TAILQ_HEAD(, spdk_nvmf_tgt) g_nvmf_tgts = TAILQ_HEAD_INITIALIZER(g_nvmf_tgts); 55 56 typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status); 57 static void spdk_nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf); 58 59 /* supplied to a single call to nvmf_qpair_disconnect */ 60 struct nvmf_qpair_disconnect_ctx { 61 struct spdk_nvmf_qpair *qpair; 62 struct spdk_nvmf_ctrlr *ctrlr; 63 nvmf_qpair_disconnect_cb cb_fn; 64 struct spdk_thread *thread; 65 void *ctx; 66 uint16_t qid; 67 }; 68 69 /* 70 * There are several times when we need to iterate through the list of all qpairs and selectively delete them. 71 * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from 72 * to enable calling nvmf_qpair_disconnect on the next desired qpair. 73 */ 74 struct nvmf_qpair_disconnect_many_ctx { 75 struct spdk_nvmf_subsystem *subsystem; 76 struct spdk_nvmf_poll_group *group; 77 spdk_nvmf_poll_group_mod_done cpl_fn; 78 void *cpl_ctx; 79 }; 80 81 static void 82 spdk_nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair, 83 enum spdk_nvmf_qpair_state state) 84 { 85 assert(qpair != NULL); 86 assert(qpair->group->thread == spdk_get_thread()); 87 88 qpair->state = state; 89 } 90 91 static int 92 spdk_nvmf_poll_group_poll(void *ctx) 93 { 94 struct spdk_nvmf_poll_group *group = ctx; 95 int rc; 96 int count = 0; 97 struct spdk_nvmf_transport_poll_group *tgroup; 98 99 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 100 rc = spdk_nvmf_transport_poll_group_poll(tgroup); 101 if (rc < 0) { 102 return -1; 103 } 104 count += rc; 105 } 106 107 return count; 108 } 109 110 static int 111 spdk_nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf) 112 { 113 struct spdk_nvmf_tgt *tgt = io_device; 114 struct spdk_nvmf_poll_group *group = ctx_buf; 115 struct spdk_nvmf_transport *transport; 116 uint32_t sid; 117 118 TAILQ_INIT(&group->tgroups); 119 TAILQ_INIT(&group->qpairs); 120 121 TAILQ_FOREACH(transport, &tgt->transports, link) { 122 spdk_nvmf_poll_group_add_transport(group, transport); 123 } 124 125 group->num_sgroups = tgt->max_subsystems; 126 group->sgroups = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group)); 127 if (!group->sgroups) { 128 return -ENOMEM; 129 } 130 131 for (sid = 0; sid < tgt->max_subsystems; sid++) { 132 struct spdk_nvmf_subsystem *subsystem; 133 134 subsystem = tgt->subsystems[sid]; 135 if (!subsystem) { 136 continue; 137 } 138 139 if (spdk_nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) { 140 spdk_nvmf_tgt_destroy_poll_group(io_device, ctx_buf); 141 return -1; 142 } 143 } 144 145 group->poller = spdk_poller_register(spdk_nvmf_poll_group_poll, group, 0); 146 group->thread = spdk_get_thread(); 147 148 return 0; 149 } 150 151 static void 152 spdk_nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf) 153 { 154 struct spdk_nvmf_poll_group *group = ctx_buf; 155 struct spdk_nvmf_transport_poll_group *tgroup, *tmp; 156 struct spdk_nvmf_subsystem_poll_group *sgroup; 157 uint32_t sid, nsid; 158 159 TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { 160 TAILQ_REMOVE(&group->tgroups, tgroup, link); 161 spdk_nvmf_transport_poll_group_destroy(tgroup); 162 } 163 164 for (sid = 0; sid < group->num_sgroups; sid++) { 165 sgroup = &group->sgroups[sid]; 166 167 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 168 if (sgroup->ns_info[nsid].channel) { 169 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 170 sgroup->ns_info[nsid].channel = NULL; 171 } 172 } 173 174 free(sgroup->ns_info); 175 } 176 177 free(group->sgroups); 178 179 if (group->destroy_cb_fn) { 180 group->destroy_cb_fn(group->destroy_cb_arg, 0); 181 } 182 } 183 184 static void 185 _nvmf_tgt_disconnect_next_qpair(void *ctx) 186 { 187 struct spdk_nvmf_qpair *qpair; 188 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 189 struct spdk_nvmf_poll_group *group = qpair_ctx->group; 190 struct spdk_io_channel *ch; 191 int rc = 0; 192 193 qpair = TAILQ_FIRST(&group->qpairs); 194 195 if (qpair) { 196 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_tgt_disconnect_next_qpair, ctx); 197 } 198 199 if (!qpair || rc != 0) { 200 /* When the refcount from the channels reaches 0, spdk_nvmf_tgt_destroy_poll_group will be called. */ 201 ch = spdk_io_channel_from_ctx(group); 202 spdk_put_io_channel(ch); 203 free(qpair_ctx); 204 } 205 } 206 207 static void 208 spdk_nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group) 209 { 210 struct nvmf_qpair_disconnect_many_ctx *ctx; 211 212 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 213 214 if (!ctx) { 215 SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n"); 216 return; 217 } 218 219 spdk_poller_unregister(&group->poller); 220 221 ctx->group = group; 222 _nvmf_tgt_disconnect_next_qpair(ctx); 223 } 224 225 struct spdk_nvmf_tgt * 226 spdk_nvmf_tgt_create(struct spdk_nvmf_target_opts *opts) 227 { 228 struct spdk_nvmf_tgt *tgt, *tmp_tgt; 229 230 if (strnlen(opts->name, NVMF_TGT_NAME_MAX_LENGTH) == NVMF_TGT_NAME_MAX_LENGTH) { 231 SPDK_ERRLOG("Provided target name exceeds the max length of %u.\n", NVMF_TGT_NAME_MAX_LENGTH); 232 return NULL; 233 } 234 235 TAILQ_FOREACH(tmp_tgt, &g_nvmf_tgts, link) { 236 if (!strncmp(opts->name, tmp_tgt->name, NVMF_TGT_NAME_MAX_LENGTH)) { 237 SPDK_ERRLOG("Provided target name must be unique.\n"); 238 return NULL; 239 } 240 } 241 242 tgt = calloc(1, sizeof(*tgt)); 243 if (!tgt) { 244 return NULL; 245 } 246 247 snprintf(tgt->name, NVMF_TGT_NAME_MAX_LENGTH, "%s", opts->name); 248 249 if (!opts || !opts->max_subsystems) { 250 tgt->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS; 251 } else { 252 tgt->max_subsystems = opts->max_subsystems; 253 } 254 255 tgt->discovery_genctr = 0; 256 TAILQ_INIT(&tgt->transports); 257 258 tgt->subsystems = calloc(tgt->max_subsystems, sizeof(struct spdk_nvmf_subsystem *)); 259 if (!tgt->subsystems) { 260 free(tgt); 261 return NULL; 262 } 263 264 TAILQ_INSERT_HEAD(&g_nvmf_tgts, tgt, link); 265 266 spdk_io_device_register(tgt, 267 spdk_nvmf_tgt_create_poll_group, 268 spdk_nvmf_tgt_destroy_poll_group, 269 sizeof(struct spdk_nvmf_poll_group), 270 tgt->name); 271 272 return tgt; 273 } 274 275 static void 276 spdk_nvmf_tgt_destroy_cb(void *io_device) 277 { 278 struct spdk_nvmf_tgt *tgt = io_device; 279 struct spdk_nvmf_transport *transport, *transport_tmp; 280 spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn; 281 void *destroy_cb_arg; 282 uint32_t i; 283 284 if (tgt->subsystems) { 285 for (i = 0; i < tgt->max_subsystems; i++) { 286 if (tgt->subsystems[i]) { 287 spdk_nvmf_subsystem_remove_all_listeners(tgt->subsystems[i], true); 288 spdk_nvmf_subsystem_destroy(tgt->subsystems[i]); 289 } 290 } 291 free(tgt->subsystems); 292 } 293 294 TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, transport_tmp) { 295 TAILQ_REMOVE(&tgt->transports, transport, link); 296 spdk_nvmf_transport_destroy(transport); 297 } 298 299 destroy_cb_fn = tgt->destroy_cb_fn; 300 destroy_cb_arg = tgt->destroy_cb_arg; 301 302 free(tgt); 303 304 if (destroy_cb_fn) { 305 destroy_cb_fn(destroy_cb_arg, 0); 306 } 307 } 308 309 void 310 spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt, 311 spdk_nvmf_tgt_destroy_done_fn cb_fn, 312 void *cb_arg) 313 { 314 tgt->destroy_cb_fn = cb_fn; 315 tgt->destroy_cb_arg = cb_arg; 316 317 TAILQ_REMOVE(&g_nvmf_tgts, tgt, link); 318 319 spdk_io_device_unregister(tgt, spdk_nvmf_tgt_destroy_cb); 320 } 321 322 const char * 323 spdk_nvmf_tgt_get_name(struct spdk_nvmf_tgt *tgt) 324 { 325 return tgt->name; 326 } 327 328 struct spdk_nvmf_tgt * 329 spdk_nvmf_get_tgt(const char *name) 330 { 331 struct spdk_nvmf_tgt *tgt; 332 uint32_t num_targets = 0; 333 334 TAILQ_FOREACH(tgt, &g_nvmf_tgts, link) { 335 if (name) { 336 if (!strncmp(tgt->name, name, NVMF_TGT_NAME_MAX_LENGTH)) { 337 return tgt; 338 } 339 } 340 num_targets++; 341 } 342 343 /* 344 * special case. If there is only one target and 345 * no name was specified, return the only available 346 * target. If there is more than one target, name must 347 * be specified. 348 */ 349 if (!name && num_targets == 1) { 350 return TAILQ_FIRST(&g_nvmf_tgts); 351 } 352 353 return NULL; 354 } 355 356 struct spdk_nvmf_tgt * 357 spdk_nvmf_get_first_tgt(void) 358 { 359 return TAILQ_FIRST(&g_nvmf_tgts); 360 } 361 362 struct spdk_nvmf_tgt * 363 spdk_nvmf_get_next_tgt(struct spdk_nvmf_tgt *prev) 364 { 365 return TAILQ_NEXT(prev, link); 366 } 367 368 static void 369 spdk_nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w, 370 struct spdk_nvmf_subsystem *subsystem) 371 { 372 struct spdk_nvmf_host *host; 373 struct spdk_nvmf_subsystem_listener *listener; 374 const struct spdk_nvme_transport_id *trid; 375 struct spdk_nvmf_ns *ns; 376 struct spdk_nvmf_ns_opts ns_opts; 377 uint32_t max_namespaces; 378 char uuid_str[SPDK_UUID_STRING_LEN]; 379 const char *adrfam; 380 381 if (spdk_nvmf_subsystem_get_type(subsystem) != SPDK_NVMF_SUBTYPE_NVME) { 382 return; 383 } 384 385 /* { */ 386 spdk_json_write_object_begin(w); 387 spdk_json_write_named_string(w, "method", "nvmf_create_subsystem"); 388 389 /* "params" : { */ 390 spdk_json_write_named_object_begin(w, "params"); 391 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 392 spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem)); 393 spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem)); 394 spdk_json_write_named_string(w, "model_number", spdk_nvmf_subsystem_get_mn(subsystem)); 395 396 max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem); 397 if (max_namespaces != 0) { 398 spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces); 399 } 400 401 /* } "params" */ 402 spdk_json_write_object_end(w); 403 404 /* } */ 405 spdk_json_write_object_end(w); 406 407 for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL; 408 listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) { 409 trid = spdk_nvmf_subsystem_listener_get_trid(listener); 410 411 adrfam = spdk_nvme_transport_id_adrfam_str(trid->adrfam); 412 413 spdk_json_write_object_begin(w); 414 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener"); 415 416 /* "params" : { */ 417 spdk_json_write_named_object_begin(w, "params"); 418 419 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 420 421 /* "listen_address" : { */ 422 spdk_json_write_named_object_begin(w, "listen_address"); 423 424 spdk_json_write_named_string(w, "trtype", trid->trstring); 425 if (adrfam) { 426 spdk_json_write_named_string(w, "adrfam", adrfam); 427 } 428 429 spdk_json_write_named_string(w, "traddr", trid->traddr); 430 spdk_json_write_named_string(w, "trsvcid", trid->trsvcid); 431 /* } "listen_address" */ 432 spdk_json_write_object_end(w); 433 434 /* } "params" */ 435 spdk_json_write_object_end(w); 436 437 /* } */ 438 spdk_json_write_object_end(w); 439 } 440 441 for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL; 442 host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) { 443 444 spdk_json_write_object_begin(w); 445 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host"); 446 447 /* "params" : { */ 448 spdk_json_write_named_object_begin(w, "params"); 449 450 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 451 spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host)); 452 453 /* } "params" */ 454 spdk_json_write_object_end(w); 455 456 /* } */ 457 spdk_json_write_object_end(w); 458 } 459 460 for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL; 461 ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) { 462 spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts)); 463 464 spdk_json_write_object_begin(w); 465 spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns"); 466 467 /* "params" : { */ 468 spdk_json_write_named_object_begin(w, "params"); 469 470 spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); 471 472 /* "namespace" : { */ 473 spdk_json_write_named_object_begin(w, "namespace"); 474 475 spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns)); 476 spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns))); 477 478 if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) { 479 SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch"); 480 spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]), 481 from_be64(&ns_opts.nguid[8])); 482 } 483 484 if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) { 485 SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch"); 486 spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64)); 487 } 488 489 if (!spdk_mem_all_zero(&ns_opts.uuid, sizeof(ns_opts.uuid))) { 490 spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &ns_opts.uuid); 491 spdk_json_write_named_string(w, "uuid", uuid_str); 492 } 493 494 /* "namespace" */ 495 spdk_json_write_object_end(w); 496 497 /* } "params" */ 498 spdk_json_write_object_end(w); 499 500 /* } */ 501 spdk_json_write_object_end(w); 502 } 503 } 504 505 void 506 spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt) 507 { 508 struct spdk_nvmf_subsystem *subsystem; 509 struct spdk_nvmf_transport *transport; 510 511 spdk_json_write_object_begin(w); 512 spdk_json_write_named_string(w, "method", "nvmf_set_max_subsystems"); 513 514 spdk_json_write_named_object_begin(w, "params"); 515 spdk_json_write_named_uint32(w, "max_subsystems", tgt->max_subsystems); 516 spdk_json_write_object_end(w); 517 518 spdk_json_write_object_end(w); 519 520 /* write transports */ 521 TAILQ_FOREACH(transport, &tgt->transports, link) { 522 spdk_json_write_object_begin(w); 523 spdk_json_write_named_string(w, "method", "nvmf_create_transport"); 524 525 spdk_json_write_named_object_begin(w, "params"); 526 spdk_json_write_named_string(w, "trtype", spdk_nvme_transport_id_trtype_str(transport->ops->type)); 527 spdk_json_write_named_uint32(w, "max_queue_depth", transport->opts.max_queue_depth); 528 spdk_json_write_named_uint32(w, "max_qpairs_per_ctrlr", transport->opts.max_qpairs_per_ctrlr); 529 spdk_json_write_named_uint32(w, "in_capsule_data_size", transport->opts.in_capsule_data_size); 530 spdk_json_write_named_uint32(w, "max_io_size", transport->opts.max_io_size); 531 spdk_json_write_named_uint32(w, "io_unit_size", transport->opts.io_unit_size); 532 spdk_json_write_named_uint32(w, "max_aq_depth", transport->opts.max_aq_depth); 533 if (transport->ops->type == SPDK_NVME_TRANSPORT_RDMA) { 534 spdk_json_write_named_uint32(w, "max_srq_depth", transport->opts.max_srq_depth); 535 } 536 spdk_json_write_object_end(w); 537 538 spdk_json_write_object_end(w); 539 } 540 541 subsystem = spdk_nvmf_subsystem_get_first(tgt); 542 while (subsystem) { 543 spdk_nvmf_write_subsystem_config_json(w, subsystem); 544 subsystem = spdk_nvmf_subsystem_get_next(subsystem); 545 } 546 } 547 548 int 549 spdk_nvmf_tgt_listen(struct spdk_nvmf_tgt *tgt, 550 struct spdk_nvme_transport_id *trid) 551 { 552 struct spdk_nvmf_transport *transport; 553 const char *trtype; 554 int rc; 555 556 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 557 if (!transport) { 558 trtype = spdk_nvme_transport_id_trtype_str(trid->trtype); 559 if (trtype != NULL) { 560 SPDK_ERRLOG("Unable to listen on transport %s. The transport must be created first.\n", trtype); 561 } else { 562 SPDK_ERRLOG("The specified trtype %d is unknown. Please make sure that it is properly registered.\n", 563 trid->trtype); 564 } 565 566 return -EINVAL; 567 } 568 569 rc = spdk_nvmf_transport_listen(transport, trid); 570 if (rc < 0) { 571 SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr); 572 } 573 574 return rc; 575 } 576 577 int 578 spdk_nvmf_tgt_stop_listen(struct spdk_nvmf_tgt *tgt, 579 struct spdk_nvme_transport_id *trid) 580 { 581 struct spdk_nvmf_transport *transport; 582 const char *trtype; 583 int rc; 584 585 transport = spdk_nvmf_tgt_get_transport(tgt, trid->trstring); 586 if (!transport) { 587 trtype = spdk_nvme_transport_id_trtype_str(trid->trtype); 588 if (trtype != NULL) { 589 SPDK_ERRLOG("Unable to stop listen on transport %s. The transport must be created first.\n", 590 trtype); 591 } else { 592 SPDK_ERRLOG("The specified trtype %d is unknown. Please make sure that it is properly registered.\n", 593 trid->trtype); 594 } 595 return -EINVAL; 596 } 597 598 rc = spdk_nvmf_transport_stop_listen(transport, trid); 599 if (rc < 0) { 600 SPDK_ERRLOG("Failed to stop listening on address '%s'\n", trid->traddr); 601 return rc; 602 } 603 return 0; 604 } 605 606 struct spdk_nvmf_tgt_add_transport_ctx { 607 struct spdk_nvmf_tgt *tgt; 608 struct spdk_nvmf_transport *transport; 609 spdk_nvmf_tgt_add_transport_done_fn cb_fn; 610 void *cb_arg; 611 }; 612 613 static void 614 _spdk_nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status) 615 { 616 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 617 618 ctx->cb_fn(ctx->cb_arg, status); 619 620 free(ctx); 621 } 622 623 static void 624 _spdk_nvmf_tgt_add_transport(struct spdk_io_channel_iter *i) 625 { 626 struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); 627 struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); 628 struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); 629 int rc; 630 631 rc = spdk_nvmf_poll_group_add_transport(group, ctx->transport); 632 spdk_for_each_channel_continue(i, rc); 633 } 634 635 void spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt, 636 struct spdk_nvmf_transport *transport, 637 spdk_nvmf_tgt_add_transport_done_fn cb_fn, 638 void *cb_arg) 639 { 640 struct spdk_nvmf_tgt_add_transport_ctx *ctx; 641 642 if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->name)) { 643 cb_fn(cb_arg, -EEXIST); 644 return; /* transport already created */ 645 } 646 647 transport->tgt = tgt; 648 TAILQ_INSERT_TAIL(&tgt->transports, transport, link); 649 650 ctx = calloc(1, sizeof(*ctx)); 651 if (!ctx) { 652 cb_fn(cb_arg, -ENOMEM); 653 return; 654 } 655 656 ctx->tgt = tgt; 657 ctx->transport = transport; 658 ctx->cb_fn = cb_fn; 659 ctx->cb_arg = cb_arg; 660 661 spdk_for_each_channel(tgt, 662 _spdk_nvmf_tgt_add_transport, 663 ctx, 664 _spdk_nvmf_tgt_add_transport_done); 665 } 666 667 struct spdk_nvmf_subsystem * 668 spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn) 669 { 670 struct spdk_nvmf_subsystem *subsystem; 671 uint32_t sid; 672 673 if (!subnqn) { 674 return NULL; 675 } 676 677 /* Ensure that subnqn is null terminated */ 678 if (!memchr(subnqn, '\0', SPDK_NVMF_NQN_MAX_LEN + 1)) { 679 SPDK_ERRLOG("Connect SUBNQN is not null terminated\n"); 680 return NULL; 681 } 682 683 for (sid = 0; sid < tgt->max_subsystems; sid++) { 684 subsystem = tgt->subsystems[sid]; 685 if (subsystem == NULL) { 686 continue; 687 } 688 689 if (strcmp(subnqn, subsystem->subnqn) == 0) { 690 return subsystem; 691 } 692 } 693 694 return NULL; 695 } 696 697 struct spdk_nvmf_transport * 698 spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, const char *transport_name) 699 { 700 struct spdk_nvmf_transport *transport; 701 702 TAILQ_FOREACH(transport, &tgt->transports, link) { 703 if (!strncasecmp(transport->ops->name, transport_name, SPDK_NVMF_TRSTRING_MAX_LEN)) { 704 return transport; 705 } 706 } 707 return NULL; 708 } 709 710 void 711 spdk_nvmf_tgt_accept(struct spdk_nvmf_tgt *tgt, new_qpair_fn cb_fn, void *cb_arg) 712 { 713 struct spdk_nvmf_transport *transport, *tmp; 714 715 TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, tmp) { 716 spdk_nvmf_transport_accept(transport, cb_fn, cb_arg); 717 } 718 } 719 720 struct spdk_nvmf_poll_group * 721 spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt) 722 { 723 struct spdk_io_channel *ch; 724 725 ch = spdk_get_io_channel(tgt); 726 if (!ch) { 727 SPDK_ERRLOG("Unable to get I/O channel for target\n"); 728 return NULL; 729 } 730 731 return spdk_io_channel_get_ctx(ch); 732 } 733 734 void 735 spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group, 736 spdk_nvmf_poll_group_destroy_done_fn cb_fn, 737 void *cb_arg) 738 { 739 assert(group->destroy_cb_fn == NULL); 740 group->destroy_cb_fn = cb_fn; 741 group->destroy_cb_arg = cb_arg; 742 743 /* This function will put the io_channel associated with this poll group */ 744 spdk_nvmf_tgt_destroy_poll_group_qpairs(group); 745 } 746 747 int 748 spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group, 749 struct spdk_nvmf_qpair *qpair) 750 { 751 int rc = -1; 752 struct spdk_nvmf_transport_poll_group *tgroup; 753 754 TAILQ_INIT(&qpair->outstanding); 755 qpair->group = group; 756 757 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 758 if (tgroup->transport == qpair->transport) { 759 rc = spdk_nvmf_transport_poll_group_add(tgroup, qpair); 760 break; 761 } 762 } 763 764 /* We add the qpair to the group only it is succesfully added into the tgroup */ 765 if (rc == 0) { 766 TAILQ_INSERT_TAIL(&group->qpairs, qpair, link); 767 spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE); 768 } 769 770 return rc; 771 } 772 773 static 774 void _nvmf_ctrlr_destruct(void *ctx) 775 { 776 struct spdk_nvmf_ctrlr *ctrlr = ctx; 777 778 spdk_nvmf_ctrlr_destruct(ctrlr); 779 } 780 781 static void 782 _spdk_nvmf_ctrlr_free_from_qpair(void *ctx) 783 { 784 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 785 struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr; 786 uint32_t count; 787 788 spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid); 789 count = spdk_bit_array_count_set(ctrlr->qpair_mask); 790 if (count == 0) { 791 spdk_bit_array_free(&ctrlr->qpair_mask); 792 793 spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr); 794 } 795 796 if (qpair_ctx->cb_fn) { 797 spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); 798 } 799 free(qpair_ctx); 800 } 801 802 static void 803 _spdk_nvmf_qpair_destroy(void *ctx, int status) 804 { 805 struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; 806 struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair; 807 struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; 808 struct spdk_nvmf_transport_poll_group *tgroup; 809 struct spdk_nvmf_request *req, *tmp; 810 struct spdk_nvmf_subsystem_poll_group *sgroup; 811 int rc; 812 813 assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING); 814 spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ERROR); 815 qpair_ctx->qid = qpair->qid; 816 817 /* Find the tgroup and remove the qpair from the tgroup */ 818 TAILQ_FOREACH(tgroup, &qpair->group->tgroups, link) { 819 if (tgroup->transport == qpair->transport) { 820 rc = spdk_nvmf_transport_poll_group_remove(tgroup, qpair); 821 if (rc && (rc != ENOTSUP)) { 822 SPDK_ERRLOG("Cannot remove qpair=%p from transport group=%p\n", 823 qpair, tgroup); 824 } 825 break; 826 } 827 } 828 829 if (ctrlr) { 830 sgroup = &qpair->group->sgroups[ctrlr->subsys->id]; 831 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 832 if (req->qpair == qpair) { 833 TAILQ_REMOVE(&sgroup->queued, req, link); 834 if (spdk_nvmf_transport_req_free(req)) { 835 SPDK_ERRLOG("Transport request free error!\n"); 836 } 837 } 838 } 839 } 840 841 TAILQ_REMOVE(&qpair->group->qpairs, qpair, link); 842 843 spdk_nvmf_transport_qpair_fini(qpair); 844 845 if (!ctrlr || !ctrlr->thread) { 846 if (qpair_ctx->cb_fn) { 847 spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); 848 } 849 free(qpair_ctx); 850 return; 851 } 852 853 qpair_ctx->ctrlr = ctrlr; 854 spdk_thread_send_msg(ctrlr->thread, _spdk_nvmf_ctrlr_free_from_qpair, qpair_ctx); 855 856 } 857 858 int 859 spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx) 860 { 861 struct nvmf_qpair_disconnect_ctx *qpair_ctx; 862 863 /* If we get a qpair in the uninitialized state, we can just destroy it immediately */ 864 if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) { 865 spdk_nvmf_transport_qpair_fini(qpair); 866 if (cb_fn) { 867 cb_fn(ctx); 868 } 869 return 0; 870 } 871 872 /* The queue pair must be disconnected from the thread that owns it */ 873 assert(qpair->group->thread == spdk_get_thread()); 874 875 if (qpair->state != SPDK_NVMF_QPAIR_ACTIVE) { 876 /* This can occur if the connection is killed by the target, 877 * which results in a notification that the connection 878 * died. Send a message to defer the processing of this 879 * callback. This allows the stack to unwind in the case 880 * where a bunch of connections are disconnected in 881 * a loop. */ 882 if (cb_fn) { 883 spdk_thread_send_msg(qpair->group->thread, cb_fn, ctx); 884 } 885 return 0; 886 } 887 888 assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE); 889 spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING); 890 891 qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); 892 if (!qpair_ctx) { 893 SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); 894 return -ENOMEM; 895 } 896 897 qpair_ctx->qpair = qpair; 898 qpair_ctx->cb_fn = cb_fn; 899 qpair_ctx->thread = qpair->group->thread; 900 qpair_ctx->ctx = ctx; 901 902 /* Check for outstanding I/O */ 903 if (!TAILQ_EMPTY(&qpair->outstanding)) { 904 qpair->state_cb = _spdk_nvmf_qpair_destroy; 905 qpair->state_cb_arg = qpair_ctx; 906 spdk_nvmf_qpair_free_aer(qpair); 907 return 0; 908 } 909 910 _spdk_nvmf_qpair_destroy(qpair_ctx, 0); 911 912 return 0; 913 } 914 915 int 916 spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair, 917 struct spdk_nvme_transport_id *trid) 918 { 919 return spdk_nvmf_transport_qpair_get_peer_trid(qpair, trid); 920 } 921 922 int 923 spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair, 924 struct spdk_nvme_transport_id *trid) 925 { 926 return spdk_nvmf_transport_qpair_get_local_trid(qpair, trid); 927 } 928 929 int 930 spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair, 931 struct spdk_nvme_transport_id *trid) 932 { 933 return spdk_nvmf_transport_qpair_get_listen_trid(qpair, trid); 934 } 935 936 int 937 spdk_nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group, 938 struct spdk_nvmf_transport *transport) 939 { 940 struct spdk_nvmf_transport_poll_group *tgroup; 941 942 TAILQ_FOREACH(tgroup, &group->tgroups, link) { 943 if (tgroup->transport == transport) { 944 /* Transport already in the poll group */ 945 return 0; 946 } 947 } 948 949 tgroup = spdk_nvmf_transport_poll_group_create(transport); 950 if (!tgroup) { 951 SPDK_ERRLOG("Unable to create poll group for transport\n"); 952 return -1; 953 } 954 955 tgroup->group = group; 956 TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); 957 958 return 0; 959 } 960 961 static int 962 poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 963 struct spdk_nvmf_subsystem *subsystem) 964 { 965 struct spdk_nvmf_subsystem_poll_group *sgroup; 966 uint32_t new_num_ns, old_num_ns; 967 uint32_t i, j; 968 struct spdk_nvmf_ns *ns; 969 struct spdk_nvmf_registrant *reg, *tmp; 970 struct spdk_io_channel *ch; 971 struct spdk_nvmf_subsystem_pg_ns_info *ns_info; 972 struct spdk_nvmf_ctrlr *ctrlr; 973 bool ns_changed; 974 975 /* Make sure our poll group has memory for this subsystem allocated */ 976 if (subsystem->id >= group->num_sgroups) { 977 return -ENOMEM; 978 } 979 980 sgroup = &group->sgroups[subsystem->id]; 981 982 /* Make sure the array of namespace information is the correct size */ 983 new_num_ns = subsystem->max_nsid; 984 old_num_ns = sgroup->num_ns; 985 986 ns_changed = false; 987 988 if (old_num_ns == 0) { 989 if (new_num_ns > 0) { 990 /* First allocation */ 991 sgroup->ns_info = calloc(new_num_ns, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 992 if (!sgroup->ns_info) { 993 return -ENOMEM; 994 } 995 } 996 } else if (new_num_ns > old_num_ns) { 997 void *buf; 998 999 /* Make the array larger */ 1000 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1001 if (!buf) { 1002 return -ENOMEM; 1003 } 1004 1005 sgroup->ns_info = buf; 1006 1007 /* Null out the new namespace information slots */ 1008 for (i = old_num_ns; i < new_num_ns; i++) { 1009 memset(&sgroup->ns_info[i], 0, sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1010 } 1011 } else if (new_num_ns < old_num_ns) { 1012 void *buf; 1013 1014 /* Free the extra I/O channels */ 1015 for (i = new_num_ns; i < old_num_ns; i++) { 1016 ns_info = &sgroup->ns_info[i]; 1017 1018 if (ns_info->channel) { 1019 spdk_put_io_channel(ns_info->channel); 1020 ns_info->channel = NULL; 1021 } 1022 } 1023 1024 /* Make the array smaller */ 1025 if (new_num_ns > 0) { 1026 buf = realloc(sgroup->ns_info, new_num_ns * sizeof(struct spdk_nvmf_subsystem_pg_ns_info)); 1027 if (!buf) { 1028 return -ENOMEM; 1029 } 1030 sgroup->ns_info = buf; 1031 } else { 1032 free(sgroup->ns_info); 1033 sgroup->ns_info = NULL; 1034 } 1035 } 1036 1037 sgroup->num_ns = new_num_ns; 1038 1039 /* Detect bdevs that were added or removed */ 1040 for (i = 0; i < sgroup->num_ns; i++) { 1041 ns = subsystem->ns[i]; 1042 ns_info = &sgroup->ns_info[i]; 1043 ch = ns_info->channel; 1044 1045 if (ns == NULL && ch == NULL) { 1046 /* Both NULL. Leave empty */ 1047 } else if (ns == NULL && ch != NULL) { 1048 /* There was a channel here, but the namespace is gone. */ 1049 ns_changed = true; 1050 spdk_put_io_channel(ch); 1051 ns_info->channel = NULL; 1052 } else if (ns != NULL && ch == NULL) { 1053 /* A namespace appeared but there is no channel yet */ 1054 ns_changed = true; 1055 ch = spdk_bdev_get_io_channel(ns->desc); 1056 if (ch == NULL) { 1057 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1058 return -ENOMEM; 1059 } 1060 ns_info->channel = ch; 1061 } else if (spdk_uuid_compare(&ns_info->uuid, spdk_bdev_get_uuid(ns->bdev)) != 0) { 1062 /* A namespace was here before, but was replaced by a new one. */ 1063 ns_changed = true; 1064 spdk_put_io_channel(ns_info->channel); 1065 memset(ns_info, 0, sizeof(*ns_info)); 1066 1067 ch = spdk_bdev_get_io_channel(ns->desc); 1068 if (ch == NULL) { 1069 SPDK_ERRLOG("Could not allocate I/O channel.\n"); 1070 return -ENOMEM; 1071 } 1072 ns_info->channel = ch; 1073 } else if (ns_info->num_blocks != spdk_bdev_get_num_blocks(ns->bdev)) { 1074 /* Namespace is still there but size has changed */ 1075 SPDK_DEBUGLOG(SPDK_LOG_NVMF, "Namespace resized: subsystem_id %d," 1076 " nsid %u, pg %p, old %lu, new %lu\n", 1077 subsystem->id, 1078 ns->nsid, 1079 group, 1080 ns_info->num_blocks, 1081 spdk_bdev_get_num_blocks(ns->bdev)); 1082 ns_changed = true; 1083 } 1084 1085 if (ns == NULL) { 1086 memset(ns_info, 0, sizeof(*ns_info)); 1087 } else { 1088 ns_info->uuid = *spdk_bdev_get_uuid(ns->bdev); 1089 ns_info->num_blocks = spdk_bdev_get_num_blocks(ns->bdev); 1090 ns_info->crkey = ns->crkey; 1091 ns_info->rtype = ns->rtype; 1092 if (ns->holder) { 1093 ns_info->holder_id = ns->holder->hostid; 1094 } 1095 1096 memset(&ns_info->reg_hostid, 0, SPDK_NVMF_MAX_NUM_REGISTRANTS * sizeof(struct spdk_uuid)); 1097 j = 0; 1098 TAILQ_FOREACH_SAFE(reg, &ns->registrants, link, tmp) { 1099 if (j >= SPDK_NVMF_MAX_NUM_REGISTRANTS) { 1100 SPDK_ERRLOG("Maximum %u registrants can support.\n", SPDK_NVMF_MAX_NUM_REGISTRANTS); 1101 return -EINVAL; 1102 } 1103 ns_info->reg_hostid[j++] = reg->hostid; 1104 } 1105 } 1106 } 1107 1108 if (ns_changed) { 1109 TAILQ_FOREACH(ctrlr, &subsystem->ctrlrs, link) { 1110 if (ctrlr->admin_qpair->group == group) { 1111 spdk_nvmf_ctrlr_async_event_ns_notice(ctrlr); 1112 } 1113 } 1114 } 1115 1116 return 0; 1117 } 1118 1119 int 1120 spdk_nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, 1121 struct spdk_nvmf_subsystem *subsystem) 1122 { 1123 return poll_group_update_subsystem(group, subsystem); 1124 } 1125 1126 int 1127 spdk_nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group, 1128 struct spdk_nvmf_subsystem *subsystem, 1129 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1130 { 1131 int rc = 0; 1132 struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id]; 1133 1134 TAILQ_INIT(&sgroup->queued); 1135 1136 rc = poll_group_update_subsystem(group, subsystem); 1137 if (rc) { 1138 spdk_nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL); 1139 goto fini; 1140 } 1141 1142 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1143 fini: 1144 if (cb_fn) { 1145 cb_fn(cb_arg, rc); 1146 } 1147 1148 return rc; 1149 } 1150 1151 static void 1152 _nvmf_poll_group_remove_subsystem_cb(void *ctx, int status) 1153 { 1154 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1155 struct spdk_nvmf_subsystem *subsystem; 1156 struct spdk_nvmf_poll_group *group; 1157 struct spdk_nvmf_subsystem_poll_group *sgroup; 1158 spdk_nvmf_poll_group_mod_done cpl_fn = NULL; 1159 void *cpl_ctx = NULL; 1160 uint32_t nsid; 1161 1162 group = qpair_ctx->group; 1163 subsystem = qpair_ctx->subsystem; 1164 cpl_fn = qpair_ctx->cpl_fn; 1165 cpl_ctx = qpair_ctx->cpl_ctx; 1166 sgroup = &group->sgroups[subsystem->id]; 1167 1168 if (status) { 1169 goto fini; 1170 } 1171 1172 for (nsid = 0; nsid < sgroup->num_ns; nsid++) { 1173 if (sgroup->ns_info[nsid].channel) { 1174 spdk_put_io_channel(sgroup->ns_info[nsid].channel); 1175 sgroup->ns_info[nsid].channel = NULL; 1176 } 1177 } 1178 1179 sgroup->num_ns = 0; 1180 free(sgroup->ns_info); 1181 sgroup->ns_info = NULL; 1182 fini: 1183 free(qpair_ctx); 1184 if (cpl_fn) { 1185 cpl_fn(cpl_ctx, status); 1186 } 1187 } 1188 1189 static void 1190 _nvmf_subsystem_disconnect_next_qpair(void *ctx) 1191 { 1192 struct spdk_nvmf_qpair *qpair; 1193 struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; 1194 struct spdk_nvmf_subsystem *subsystem; 1195 struct spdk_nvmf_poll_group *group; 1196 int rc = 0; 1197 1198 group = qpair_ctx->group; 1199 subsystem = qpair_ctx->subsystem; 1200 1201 TAILQ_FOREACH(qpair, &group->qpairs, link) { 1202 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1203 break; 1204 } 1205 } 1206 1207 if (qpair) { 1208 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, qpair_ctx); 1209 } 1210 1211 if (!qpair || rc != 0) { 1212 _nvmf_poll_group_remove_subsystem_cb(ctx, rc); 1213 } 1214 return; 1215 } 1216 1217 void 1218 spdk_nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group, 1219 struct spdk_nvmf_subsystem *subsystem, 1220 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1221 { 1222 struct spdk_nvmf_qpair *qpair; 1223 struct spdk_nvmf_subsystem_poll_group *sgroup; 1224 struct nvmf_qpair_disconnect_many_ctx *ctx; 1225 int rc = 0; 1226 1227 ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); 1228 1229 if (!ctx) { 1230 SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n"); 1231 goto fini; 1232 } 1233 1234 ctx->group = group; 1235 ctx->subsystem = subsystem; 1236 ctx->cpl_fn = cb_fn; 1237 ctx->cpl_ctx = cb_arg; 1238 1239 sgroup = &group->sgroups[subsystem->id]; 1240 sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE; 1241 1242 TAILQ_FOREACH(qpair, &group->qpairs, link) { 1243 if ((qpair->ctrlr != NULL) && (qpair->ctrlr->subsys == subsystem)) { 1244 break; 1245 } 1246 } 1247 1248 if (qpair) { 1249 rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, ctx); 1250 } else { 1251 /* call the callback immediately. It will handle any channel iteration */ 1252 _nvmf_poll_group_remove_subsystem_cb(ctx, 0); 1253 } 1254 1255 if (rc != 0) { 1256 free(ctx); 1257 goto fini; 1258 } 1259 1260 return; 1261 fini: 1262 if (cb_fn) { 1263 cb_fn(cb_arg, rc); 1264 } 1265 } 1266 1267 void 1268 spdk_nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group, 1269 struct spdk_nvmf_subsystem *subsystem, 1270 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1271 { 1272 struct spdk_nvmf_subsystem_poll_group *sgroup; 1273 int rc = 0; 1274 1275 if (subsystem->id >= group->num_sgroups) { 1276 rc = -1; 1277 goto fini; 1278 } 1279 1280 sgroup = &group->sgroups[subsystem->id]; 1281 if (sgroup == NULL) { 1282 rc = -1; 1283 goto fini; 1284 } 1285 1286 assert(sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE); 1287 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSING; 1288 1289 if (sgroup->io_outstanding > 0) { 1290 sgroup->cb_fn = cb_fn; 1291 sgroup->cb_arg = cb_arg; 1292 return; 1293 } 1294 1295 assert(sgroup->io_outstanding == 0); 1296 sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED; 1297 fini: 1298 if (cb_fn) { 1299 cb_fn(cb_arg, rc); 1300 } 1301 } 1302 1303 void 1304 spdk_nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group, 1305 struct spdk_nvmf_subsystem *subsystem, 1306 spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) 1307 { 1308 struct spdk_nvmf_request *req, *tmp; 1309 struct spdk_nvmf_subsystem_poll_group *sgroup; 1310 int rc = 0; 1311 1312 if (subsystem->id >= group->num_sgroups) { 1313 rc = -1; 1314 goto fini; 1315 } 1316 1317 sgroup = &group->sgroups[subsystem->id]; 1318 1319 assert(sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED); 1320 1321 rc = poll_group_update_subsystem(group, subsystem); 1322 if (rc) { 1323 goto fini; 1324 } 1325 1326 sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; 1327 1328 /* Release all queued requests */ 1329 TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { 1330 TAILQ_REMOVE(&sgroup->queued, req, link); 1331 spdk_nvmf_request_exec(req); 1332 } 1333 fini: 1334 if (cb_fn) { 1335 cb_fn(cb_arg, rc); 1336 } 1337 } 1338 1339 1340 struct spdk_nvmf_poll_group * 1341 spdk_nvmf_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair) 1342 { 1343 struct spdk_nvmf_transport_poll_group *tgroup; 1344 1345 tgroup = spdk_nvmf_transport_get_optimal_poll_group(qpair->transport, qpair); 1346 1347 if (tgroup == NULL) { 1348 return NULL; 1349 } 1350 1351 return tgroup->group; 1352 } 1353 1354 int 1355 spdk_nvmf_poll_group_get_stat(struct spdk_nvmf_tgt *tgt, 1356 struct spdk_nvmf_poll_group_stat *stat) 1357 { 1358 struct spdk_io_channel *ch; 1359 struct spdk_nvmf_poll_group *group; 1360 1361 if (tgt == NULL || stat == NULL) { 1362 return -EINVAL; 1363 } 1364 1365 ch = spdk_get_io_channel(tgt); 1366 group = spdk_io_channel_get_ctx(ch); 1367 *stat = group->stat; 1368 spdk_put_io_channel(ch); 1369 return 0; 1370 } 1371