1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2018 Intel Corporation. 3 * All rights reserved. 4 * Copyright (c) 2022-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved. 5 */ 6 7 #include "spdk/bdev.h" 8 9 #include "spdk/env.h" 10 #include "spdk/rpc.h" 11 #include "spdk/util.h" 12 #include "spdk/string.h" 13 #include "spdk/base64.h" 14 #include "spdk/bdev_module.h" 15 #include "spdk/dma.h" 16 17 #include "spdk/log.h" 18 19 #include "bdev_internal.h" 20 21 static void 22 dummy_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *ctx) 23 { 24 } 25 26 struct spdk_rpc_set_bdev_opts { 27 uint32_t bdev_io_pool_size; 28 uint32_t bdev_io_cache_size; 29 bool bdev_auto_examine; 30 }; 31 32 static const struct spdk_json_object_decoder rpc_set_bdev_opts_decoders[] = { 33 {"bdev_io_pool_size", offsetof(struct spdk_rpc_set_bdev_opts, bdev_io_pool_size), spdk_json_decode_uint32, true}, 34 {"bdev_io_cache_size", offsetof(struct spdk_rpc_set_bdev_opts, bdev_io_cache_size), spdk_json_decode_uint32, true}, 35 {"bdev_auto_examine", offsetof(struct spdk_rpc_set_bdev_opts, bdev_auto_examine), spdk_json_decode_bool, true}, 36 }; 37 38 static void 39 rpc_bdev_set_options(struct spdk_jsonrpc_request *request, const struct spdk_json_val *params) 40 { 41 struct spdk_rpc_set_bdev_opts rpc_opts; 42 struct spdk_bdev_opts bdev_opts; 43 int rc; 44 45 rpc_opts.bdev_io_pool_size = UINT32_MAX; 46 rpc_opts.bdev_io_cache_size = UINT32_MAX; 47 rpc_opts.bdev_auto_examine = true; 48 49 if (params != NULL) { 50 if (spdk_json_decode_object(params, rpc_set_bdev_opts_decoders, 51 SPDK_COUNTOF(rpc_set_bdev_opts_decoders), &rpc_opts)) { 52 SPDK_ERRLOG("spdk_json_decode_object() failed\n"); 53 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, 54 "Invalid parameters"); 55 return; 56 } 57 } 58 59 spdk_bdev_get_opts(&bdev_opts, sizeof(bdev_opts)); 60 if (rpc_opts.bdev_io_pool_size != UINT32_MAX) { 61 bdev_opts.bdev_io_pool_size = rpc_opts.bdev_io_pool_size; 62 } 63 if (rpc_opts.bdev_io_cache_size != UINT32_MAX) { 64 bdev_opts.bdev_io_cache_size = rpc_opts.bdev_io_cache_size; 65 } 66 bdev_opts.bdev_auto_examine = rpc_opts.bdev_auto_examine; 67 68 rc = spdk_bdev_set_opts(&bdev_opts); 69 70 if (rc != 0) { 71 spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, 72 "Pool size %" PRIu32 " too small for cache size %" PRIu32, 73 bdev_opts.bdev_io_pool_size, bdev_opts.bdev_io_cache_size); 74 return; 75 } 76 77 spdk_jsonrpc_send_bool_response(request, true); 78 } 79 SPDK_RPC_REGISTER("bdev_set_options", rpc_bdev_set_options, SPDK_RPC_STARTUP) 80 81 static void 82 rpc_bdev_wait_for_examine_cpl(void *arg) 83 { 84 struct spdk_jsonrpc_request *request = arg; 85 86 spdk_jsonrpc_send_bool_response(request, true); 87 } 88 89 static void 90 rpc_bdev_wait_for_examine(struct spdk_jsonrpc_request *request, 91 const struct spdk_json_val *params) 92 { 93 int rc; 94 95 if (params != NULL) { 96 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, 97 "bdev_wait_for_examine requires no parameters"); 98 return; 99 } 100 101 rc = spdk_bdev_wait_for_examine(rpc_bdev_wait_for_examine_cpl, request); 102 if (rc != 0) { 103 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 104 } 105 } 106 SPDK_RPC_REGISTER("bdev_wait_for_examine", rpc_bdev_wait_for_examine, SPDK_RPC_RUNTIME) 107 108 struct rpc_bdev_examine { 109 char *name; 110 }; 111 112 static void 113 free_rpc_bdev_examine(struct rpc_bdev_examine *r) 114 { 115 free(r->name); 116 } 117 118 static const struct spdk_json_object_decoder rpc_examine_bdev_decoders[] = { 119 {"name", offsetof(struct rpc_bdev_examine, name), spdk_json_decode_string}, 120 }; 121 122 static void 123 rpc_bdev_examine_bdev(struct spdk_jsonrpc_request *request, 124 const struct spdk_json_val *params) 125 { 126 struct rpc_bdev_examine req = {NULL}; 127 int rc; 128 129 if (spdk_json_decode_object(params, rpc_examine_bdev_decoders, 130 SPDK_COUNTOF(rpc_examine_bdev_decoders), 131 &req)) { 132 SPDK_ERRLOG("spdk_json_decode_object() failed\n"); 133 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, 134 "spdk_json_decode_object failed"); 135 goto cleanup; 136 } 137 138 rc = spdk_bdev_examine(req.name); 139 if (rc != 0) { 140 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 141 goto cleanup; 142 } 143 144 spdk_jsonrpc_send_bool_response(request, true); 145 146 cleanup: 147 free_rpc_bdev_examine(&req); 148 } 149 SPDK_RPC_REGISTER("bdev_examine", rpc_bdev_examine_bdev, SPDK_RPC_RUNTIME) 150 151 struct rpc_get_iostat_ctx { 152 int bdev_count; 153 int rc; 154 struct spdk_jsonrpc_request *request; 155 struct spdk_json_write_ctx *w; 156 bool per_channel; 157 }; 158 159 struct bdev_get_iostat_ctx { 160 struct spdk_bdev_io_stat *stat; 161 struct rpc_get_iostat_ctx *rpc_ctx; 162 struct spdk_bdev_desc *desc; 163 }; 164 165 static void 166 rpc_get_iostat_started(struct rpc_get_iostat_ctx *rpc_ctx) 167 { 168 rpc_ctx->w = spdk_jsonrpc_begin_result(rpc_ctx->request); 169 170 spdk_json_write_object_begin(rpc_ctx->w); 171 spdk_json_write_named_uint64(rpc_ctx->w, "tick_rate", spdk_get_ticks_hz()); 172 spdk_json_write_named_uint64(rpc_ctx->w, "ticks", spdk_get_ticks()); 173 } 174 175 static void 176 rpc_get_iostat_done(struct rpc_get_iostat_ctx *rpc_ctx) 177 { 178 if (--rpc_ctx->bdev_count != 0) { 179 return; 180 } 181 182 if (rpc_ctx->rc == 0) { 183 spdk_json_write_array_end(rpc_ctx->w); 184 spdk_json_write_object_end(rpc_ctx->w); 185 spdk_jsonrpc_end_result(rpc_ctx->request, rpc_ctx->w); 186 } else { 187 /* Return error response after processing all specified bdevs 188 * completed or failed. 189 */ 190 spdk_jsonrpc_send_error_response(rpc_ctx->request, rpc_ctx->rc, 191 spdk_strerror(-rpc_ctx->rc)); 192 } 193 194 free(rpc_ctx); 195 } 196 197 static struct bdev_get_iostat_ctx * 198 bdev_iostat_ctx_alloc(bool iostat_ext) 199 { 200 struct bdev_get_iostat_ctx *ctx; 201 202 ctx = calloc(1, sizeof(struct bdev_get_iostat_ctx)); 203 if (ctx == NULL) { 204 return NULL; 205 } 206 207 ctx->stat = bdev_alloc_io_stat(iostat_ext); 208 if (ctx->stat == NULL) { 209 free(ctx); 210 return NULL; 211 } 212 213 return ctx; 214 } 215 216 static void 217 bdev_iostat_ctx_free(struct bdev_get_iostat_ctx *ctx) 218 { 219 bdev_free_io_stat(ctx->stat); 220 free(ctx); 221 } 222 223 static void 224 bdev_get_iostat_done(struct spdk_bdev *bdev, struct spdk_bdev_io_stat *stat, 225 void *cb_arg, int rc) 226 { 227 struct bdev_get_iostat_ctx *bdev_ctx = cb_arg; 228 struct rpc_get_iostat_ctx *rpc_ctx = bdev_ctx->rpc_ctx; 229 struct spdk_json_write_ctx *w = rpc_ctx->w; 230 231 if (rc != 0 || rpc_ctx->rc != 0) { 232 if (rpc_ctx->rc == 0) { 233 rpc_ctx->rc = rc; 234 } 235 goto done; 236 } 237 238 assert(stat == bdev_ctx->stat); 239 240 spdk_json_write_object_begin(w); 241 242 spdk_json_write_named_string(w, "name", spdk_bdev_get_name(bdev)); 243 244 spdk_bdev_dump_io_stat_json(stat, w); 245 246 if (spdk_bdev_get_qd_sampling_period(bdev)) { 247 spdk_json_write_named_uint64(w, "queue_depth_polling_period", 248 spdk_bdev_get_qd_sampling_period(bdev)); 249 250 spdk_json_write_named_uint64(w, "queue_depth", spdk_bdev_get_qd(bdev)); 251 252 spdk_json_write_named_uint64(w, "io_time", spdk_bdev_get_io_time(bdev)); 253 254 spdk_json_write_named_uint64(w, "weighted_io_time", 255 spdk_bdev_get_weighted_io_time(bdev)); 256 } 257 258 if (bdev->fn_table->dump_device_stat_json) { 259 spdk_json_write_named_object_begin(w, "driver_specific"); 260 bdev->fn_table->dump_device_stat_json(bdev->ctxt, w); 261 spdk_json_write_object_end(w); 262 } 263 264 spdk_json_write_object_end(w); 265 266 done: 267 rpc_get_iostat_done(rpc_ctx); 268 269 spdk_bdev_close(bdev_ctx->desc); 270 bdev_iostat_ctx_free(bdev_ctx); 271 } 272 273 static int 274 bdev_get_iostat(void *ctx, struct spdk_bdev *bdev) 275 { 276 struct rpc_get_iostat_ctx *rpc_ctx = ctx; 277 struct bdev_get_iostat_ctx *bdev_ctx; 278 int rc; 279 280 bdev_ctx = bdev_iostat_ctx_alloc(true); 281 if (bdev_ctx == NULL) { 282 SPDK_ERRLOG("Failed to allocate bdev_iostat_ctx struct\n"); 283 return -ENOMEM; 284 } 285 286 rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false, dummy_bdev_event_cb, NULL, 287 &bdev_ctx->desc); 288 if (rc != 0) { 289 bdev_iostat_ctx_free(bdev_ctx); 290 SPDK_ERRLOG("Failed to open bdev\n"); 291 return rc; 292 } 293 294 rpc_ctx->bdev_count++; 295 bdev_ctx->rpc_ctx = rpc_ctx; 296 spdk_bdev_get_device_stat(bdev, bdev_ctx->stat, bdev_get_iostat_done, bdev_ctx); 297 298 return 0; 299 } 300 301 static void 302 bdev_get_per_channel_stat_done(struct spdk_bdev *bdev, void *ctx, int status) 303 { 304 struct bdev_get_iostat_ctx *bdev_ctx = ctx; 305 306 rpc_get_iostat_done(bdev_ctx->rpc_ctx); 307 308 spdk_bdev_close(bdev_ctx->desc); 309 310 bdev_iostat_ctx_free(bdev_ctx); 311 } 312 313 static void 314 bdev_get_per_channel_stat(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev, 315 struct spdk_io_channel *ch, void *ctx) 316 { 317 struct bdev_get_iostat_ctx *bdev_ctx = ctx; 318 struct spdk_json_write_ctx *w = bdev_ctx->rpc_ctx->w; 319 320 spdk_bdev_get_io_stat(bdev, ch, bdev_ctx->stat); 321 322 spdk_json_write_object_begin(w); 323 spdk_json_write_named_uint64(w, "thread_id", spdk_thread_get_id(spdk_get_thread())); 324 spdk_bdev_dump_io_stat_json(bdev_ctx->stat, w); 325 spdk_json_write_object_end(w); 326 327 spdk_bdev_for_each_channel_continue(i, 0); 328 } 329 330 struct rpc_bdev_get_iostat { 331 char *name; 332 bool per_channel; 333 }; 334 335 static void 336 free_rpc_bdev_get_iostat(struct rpc_bdev_get_iostat *r) 337 { 338 free(r->name); 339 } 340 341 static const struct spdk_json_object_decoder rpc_bdev_get_iostat_decoders[] = { 342 {"name", offsetof(struct rpc_bdev_get_iostat, name), spdk_json_decode_string, true}, 343 {"per_channel", offsetof(struct rpc_bdev_get_iostat, per_channel), spdk_json_decode_bool, true}, 344 }; 345 346 static void 347 rpc_bdev_get_iostat(struct spdk_jsonrpc_request *request, 348 const struct spdk_json_val *params) 349 { 350 struct rpc_bdev_get_iostat req = {}; 351 struct spdk_bdev_desc *desc = NULL; 352 struct rpc_get_iostat_ctx *rpc_ctx; 353 struct bdev_get_iostat_ctx *bdev_ctx; 354 struct spdk_bdev *bdev; 355 int rc; 356 357 if (params != NULL) { 358 if (spdk_json_decode_object(params, rpc_bdev_get_iostat_decoders, 359 SPDK_COUNTOF(rpc_bdev_get_iostat_decoders), 360 &req)) { 361 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 362 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 363 "spdk_json_decode_object failed"); 364 free_rpc_bdev_get_iostat(&req); 365 return; 366 } 367 368 if (req.per_channel == true && !req.name) { 369 SPDK_ERRLOG("Bdev name is required for per channel IO statistics\n"); 370 spdk_jsonrpc_send_error_response(request, -EINVAL, spdk_strerror(EINVAL)); 371 free_rpc_bdev_get_iostat(&req); 372 return; 373 } 374 375 if (req.name) { 376 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 377 if (rc != 0) { 378 SPDK_ERRLOG("Failed to open bdev '%s': %d\n", req.name, rc); 379 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 380 free_rpc_bdev_get_iostat(&req); 381 return; 382 } 383 } 384 } 385 386 free_rpc_bdev_get_iostat(&req); 387 388 rpc_ctx = calloc(1, sizeof(struct rpc_get_iostat_ctx)); 389 if (rpc_ctx == NULL) { 390 SPDK_ERRLOG("Failed to allocate rpc_iostat_ctx struct\n"); 391 spdk_jsonrpc_send_error_response(request, -ENOMEM, spdk_strerror(ENOMEM)); 392 return; 393 } 394 395 /* 396 * Increment initial bdev_count so that it will never reach 0 in the middle 397 * of iterating. 398 */ 399 rpc_ctx->bdev_count++; 400 rpc_ctx->request = request; 401 rpc_ctx->per_channel = req.per_channel; 402 403 if (desc != NULL) { 404 bdev = spdk_bdev_desc_get_bdev(desc); 405 406 bdev_ctx = bdev_iostat_ctx_alloc(req.per_channel == false); 407 if (bdev_ctx == NULL) { 408 SPDK_ERRLOG("Failed to allocate bdev_iostat_ctx struct\n"); 409 rpc_ctx->rc = -ENOMEM; 410 411 spdk_bdev_close(desc); 412 } else { 413 bdev_ctx->desc = desc; 414 415 rpc_ctx->bdev_count++; 416 bdev_ctx->rpc_ctx = rpc_ctx; 417 if (req.per_channel == false) { 418 spdk_bdev_get_device_stat(bdev, bdev_ctx->stat, bdev_get_iostat_done, 419 bdev_ctx); 420 } else { 421 /* If per_channel is true, there is no failure after here and 422 * we have to start RPC response before executing 423 * spdk_bdev_for_each_channel(). 424 */ 425 rpc_get_iostat_started(rpc_ctx); 426 spdk_json_write_named_string(rpc_ctx->w, "name", spdk_bdev_get_name(bdev)); 427 spdk_json_write_named_array_begin(rpc_ctx->w, "channels"); 428 429 spdk_bdev_for_each_channel(bdev, 430 bdev_get_per_channel_stat, 431 bdev_ctx, 432 bdev_get_per_channel_stat_done); 433 434 rpc_get_iostat_done(rpc_ctx); 435 return; 436 } 437 } 438 } else { 439 rc = spdk_for_each_bdev(rpc_ctx, bdev_get_iostat); 440 if (rc != 0 && rpc_ctx->rc == 0) { 441 rpc_ctx->rc = rc; 442 } 443 } 444 445 if (rpc_ctx->rc == 0) { 446 /* We want to fail the RPC for all failures. If per_channel is false, 447 * it is enough to defer starting RPC response until it is ensured that 448 * all spdk_bdev_for_each_channel() calls will succeed or there is no bdev. 449 */ 450 rpc_get_iostat_started(rpc_ctx); 451 spdk_json_write_named_array_begin(rpc_ctx->w, "bdevs"); 452 } 453 454 rpc_get_iostat_done(rpc_ctx); 455 } 456 SPDK_RPC_REGISTER("bdev_get_iostat", rpc_bdev_get_iostat, SPDK_RPC_RUNTIME) 457 458 struct rpc_reset_iostat_ctx { 459 int bdev_count; 460 int rc; 461 struct spdk_jsonrpc_request *request; 462 struct spdk_json_write_ctx *w; 463 enum spdk_bdev_reset_stat_mode mode; 464 }; 465 466 struct bdev_reset_iostat_ctx { 467 struct rpc_reset_iostat_ctx *rpc_ctx; 468 struct spdk_bdev_desc *desc; 469 }; 470 471 static void 472 rpc_reset_iostat_done(struct rpc_reset_iostat_ctx *rpc_ctx) 473 { 474 if (--rpc_ctx->bdev_count != 0) { 475 return; 476 } 477 478 if (rpc_ctx->rc == 0) { 479 spdk_jsonrpc_send_bool_response(rpc_ctx->request, true); 480 } else { 481 spdk_jsonrpc_send_error_response(rpc_ctx->request, rpc_ctx->rc, 482 spdk_strerror(-rpc_ctx->rc)); 483 } 484 485 free(rpc_ctx); 486 } 487 488 static void 489 bdev_reset_iostat_done(struct spdk_bdev *bdev, void *cb_arg, int rc) 490 { 491 struct bdev_reset_iostat_ctx *bdev_ctx = cb_arg; 492 struct rpc_reset_iostat_ctx *rpc_ctx = bdev_ctx->rpc_ctx; 493 494 if (rc != 0 || rpc_ctx->rc != 0) { 495 if (rpc_ctx->rc == 0) { 496 rpc_ctx->rc = rc; 497 } 498 } 499 500 rpc_reset_iostat_done(rpc_ctx); 501 502 spdk_bdev_close(bdev_ctx->desc); 503 free(bdev_ctx); 504 } 505 506 static int 507 bdev_reset_iostat(void *ctx, struct spdk_bdev *bdev) 508 { 509 struct rpc_reset_iostat_ctx *rpc_ctx = ctx; 510 struct bdev_reset_iostat_ctx *bdev_ctx; 511 int rc; 512 513 bdev_ctx = calloc(1, sizeof(struct bdev_reset_iostat_ctx)); 514 if (bdev_ctx == NULL) { 515 SPDK_ERRLOG("Failed to allocate bdev_iostat_ctx struct\n"); 516 return -ENOMEM; 517 } 518 519 rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false, dummy_bdev_event_cb, NULL, 520 &bdev_ctx->desc); 521 if (rc != 0) { 522 free(bdev_ctx); 523 SPDK_ERRLOG("Failed to open bdev\n"); 524 return rc; 525 } 526 527 if (bdev->fn_table->reset_device_stat) { 528 bdev->fn_table->reset_device_stat(bdev->ctxt); 529 } 530 531 rpc_ctx->bdev_count++; 532 bdev_ctx->rpc_ctx = rpc_ctx; 533 bdev_reset_device_stat(bdev, rpc_ctx->mode, bdev_reset_iostat_done, bdev_ctx); 534 535 return 0; 536 } 537 538 struct rpc_bdev_reset_iostat { 539 char *name; 540 enum spdk_bdev_reset_stat_mode mode; 541 }; 542 543 static void 544 free_rpc_bdev_reset_iostat(struct rpc_bdev_reset_iostat *r) 545 { 546 free(r->name); 547 } 548 549 static int 550 rpc_decode_reset_iostat_mode(const struct spdk_json_val *val, void *out) 551 { 552 enum spdk_bdev_reset_stat_mode *mode = out; 553 554 if (spdk_json_strequal(val, "all") == true) { 555 *mode = SPDK_BDEV_RESET_STAT_ALL; 556 } else if (spdk_json_strequal(val, "maxmin") == true) { 557 *mode = SPDK_BDEV_RESET_STAT_MAXMIN; 558 } else { 559 SPDK_NOTICELOG("Invalid parameter value: mode\n"); 560 return -EINVAL; 561 } 562 563 return 0; 564 } 565 566 static const struct spdk_json_object_decoder rpc_bdev_reset_iostat_decoders[] = { 567 {"name", offsetof(struct rpc_bdev_reset_iostat, name), spdk_json_decode_string, true}, 568 {"mode", offsetof(struct rpc_bdev_reset_iostat, mode), rpc_decode_reset_iostat_mode, true}, 569 }; 570 571 static void 572 rpc_bdev_reset_iostat(struct spdk_jsonrpc_request *request, const struct spdk_json_val *params) 573 { 574 struct rpc_bdev_reset_iostat req = { .mode = SPDK_BDEV_RESET_STAT_ALL, }; 575 struct spdk_bdev_desc *desc = NULL; 576 struct rpc_reset_iostat_ctx *rpc_ctx; 577 struct bdev_reset_iostat_ctx *bdev_ctx; 578 int rc; 579 580 if (params != NULL) { 581 if (spdk_json_decode_object(params, rpc_bdev_reset_iostat_decoders, 582 SPDK_COUNTOF(rpc_bdev_reset_iostat_decoders), 583 &req)) { 584 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 585 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 586 "spdk_json_decode_object failed"); 587 free_rpc_bdev_reset_iostat(&req); 588 return; 589 } 590 591 if (req.name) { 592 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 593 if (rc != 0) { 594 SPDK_ERRLOG("Failed to open bdev '%s': %d\n", req.name, rc); 595 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 596 free_rpc_bdev_reset_iostat(&req); 597 return; 598 } 599 } 600 } 601 602 603 rpc_ctx = calloc(1, sizeof(struct rpc_reset_iostat_ctx)); 604 if (rpc_ctx == NULL) { 605 SPDK_ERRLOG("Failed to allocate rpc_iostat_ctx struct\n"); 606 spdk_jsonrpc_send_error_response(request, -ENOMEM, spdk_strerror(ENOMEM)); 607 free_rpc_bdev_reset_iostat(&req); 608 return; 609 } 610 611 /* 612 * Increment initial bdev_count so that it will never reach 0 in the middle 613 * of iterating. 614 */ 615 rpc_ctx->bdev_count++; 616 rpc_ctx->request = request; 617 rpc_ctx->mode = req.mode; 618 619 free_rpc_bdev_reset_iostat(&req); 620 621 if (desc != NULL) { 622 bdev_ctx = calloc(1, sizeof(struct bdev_reset_iostat_ctx)); 623 if (bdev_ctx == NULL) { 624 SPDK_ERRLOG("Failed to allocate bdev_iostat_ctx struct\n"); 625 rpc_ctx->rc = -ENOMEM; 626 627 spdk_bdev_close(desc); 628 } else { 629 bdev_ctx->desc = desc; 630 631 rpc_ctx->bdev_count++; 632 bdev_ctx->rpc_ctx = rpc_ctx; 633 bdev_reset_device_stat(spdk_bdev_desc_get_bdev(desc), rpc_ctx->mode, 634 bdev_reset_iostat_done, bdev_ctx); 635 } 636 } else { 637 rc = spdk_for_each_bdev(rpc_ctx, bdev_reset_iostat); 638 if (rc != 0 && rpc_ctx->rc == 0) { 639 rpc_ctx->rc = rc; 640 } 641 } 642 643 rpc_reset_iostat_done(rpc_ctx); 644 } 645 SPDK_RPC_REGISTER("bdev_reset_iostat", rpc_bdev_reset_iostat, SPDK_RPC_RUNTIME) 646 647 static int 648 rpc_dump_bdev_info(void *ctx, struct spdk_bdev *bdev) 649 { 650 struct spdk_json_write_ctx *w = ctx; 651 struct spdk_bdev_alias *tmp; 652 uint64_t qos_limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES]; 653 struct spdk_memory_domain **domains; 654 int i, rc; 655 656 spdk_json_write_object_begin(w); 657 658 spdk_json_write_named_string(w, "name", spdk_bdev_get_name(bdev)); 659 660 spdk_json_write_named_array_begin(w, "aliases"); 661 662 TAILQ_FOREACH(tmp, spdk_bdev_get_aliases(bdev), tailq) { 663 spdk_json_write_string(w, tmp->alias.name); 664 } 665 666 spdk_json_write_array_end(w); 667 668 spdk_json_write_named_string(w, "product_name", spdk_bdev_get_product_name(bdev)); 669 spdk_json_write_named_uint32(w, "block_size", spdk_bdev_get_block_size(bdev)); 670 spdk_json_write_named_uint64(w, "num_blocks", spdk_bdev_get_num_blocks(bdev)); 671 spdk_json_write_named_uuid(w, "uuid", &bdev->uuid); 672 673 if (spdk_bdev_get_md_size(bdev) != 0) { 674 spdk_json_write_named_uint32(w, "md_size", spdk_bdev_get_md_size(bdev)); 675 spdk_json_write_named_bool(w, "md_interleave", spdk_bdev_is_md_interleaved(bdev)); 676 spdk_json_write_named_uint32(w, "dif_type", spdk_bdev_get_dif_type(bdev)); 677 if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) { 678 spdk_json_write_named_bool(w, "dif_is_head_of_md", spdk_bdev_is_dif_head_of_md(bdev)); 679 spdk_json_write_named_object_begin(w, "enabled_dif_check_types"); 680 spdk_json_write_named_bool(w, "reftag", 681 spdk_bdev_is_dif_check_enabled(bdev, SPDK_DIF_CHECK_TYPE_REFTAG)); 682 spdk_json_write_named_bool(w, "apptag", 683 spdk_bdev_is_dif_check_enabled(bdev, SPDK_DIF_CHECK_TYPE_APPTAG)); 684 spdk_json_write_named_bool(w, "guard", 685 spdk_bdev_is_dif_check_enabled(bdev, SPDK_DIF_CHECK_TYPE_GUARD)); 686 spdk_json_write_object_end(w); 687 } 688 } 689 690 spdk_json_write_named_object_begin(w, "assigned_rate_limits"); 691 spdk_bdev_get_qos_rate_limits(bdev, qos_limits); 692 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) { 693 spdk_json_write_named_uint64(w, spdk_bdev_get_qos_rpc_type(i), qos_limits[i]); 694 } 695 spdk_json_write_object_end(w); 696 697 spdk_json_write_named_bool(w, "claimed", 698 (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE)); 699 if (bdev->internal.claim_type != SPDK_BDEV_CLAIM_NONE) { 700 spdk_json_write_named_string(w, "claim_type", 701 spdk_bdev_claim_get_name(bdev->internal.claim_type)); 702 } 703 704 spdk_json_write_named_bool(w, "zoned", bdev->zoned); 705 if (bdev->zoned) { 706 spdk_json_write_named_uint64(w, "zone_size", bdev->zone_size); 707 spdk_json_write_named_uint64(w, "max_open_zones", bdev->max_open_zones); 708 spdk_json_write_named_uint64(w, "optimal_open_zones", bdev->optimal_open_zones); 709 } 710 711 spdk_json_write_named_object_begin(w, "supported_io_types"); 712 spdk_json_write_named_bool(w, "read", 713 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_READ)); 714 spdk_json_write_named_bool(w, "write", 715 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE)); 716 spdk_json_write_named_bool(w, "unmap", 717 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_UNMAP)); 718 spdk_json_write_named_bool(w, "write_zeroes", 719 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)); 720 spdk_json_write_named_bool(w, "flush", 721 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_FLUSH)); 722 spdk_json_write_named_bool(w, "reset", 723 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_RESET)); 724 spdk_json_write_named_bool(w, "compare", 725 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE)); 726 spdk_json_write_named_bool(w, "compare_and_write", 727 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_COMPARE_AND_WRITE)); 728 spdk_json_write_named_bool(w, "abort", 729 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_ABORT)); 730 spdk_json_write_named_bool(w, "nvme_admin", 731 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_ADMIN)); 732 spdk_json_write_named_bool(w, "nvme_io", 733 spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_NVME_IO)); 734 spdk_json_write_object_end(w); 735 736 rc = spdk_bdev_get_memory_domains(bdev, NULL, 0); 737 if (rc > 0) { 738 domains = calloc(rc, sizeof(struct spdk_memory_domain *)); 739 if (domains) { 740 i = spdk_bdev_get_memory_domains(bdev, domains, rc); 741 if (i == rc) { 742 spdk_json_write_named_array_begin(w, "memory_domains"); 743 for (i = 0; i < rc; i++) { 744 spdk_json_write_object_begin(w); 745 spdk_json_write_named_string(w, "dma_device_id", spdk_memory_domain_get_dma_device_id(domains[i])); 746 spdk_json_write_named_int32(w, "dma_device_type", 747 spdk_memory_domain_get_dma_device_type(domains[i])); 748 spdk_json_write_object_end(w); 749 } 750 spdk_json_write_array_end(w); 751 } else { 752 SPDK_ERRLOG("Unexpected number of memory domains %d (should be %d)\n", i, rc); 753 } 754 755 free(domains); 756 } else { 757 SPDK_ERRLOG("Memory allocation failed\n"); 758 } 759 } 760 761 spdk_json_write_named_object_begin(w, "driver_specific"); 762 spdk_bdev_dump_info_json(bdev, w); 763 spdk_json_write_object_end(w); 764 765 spdk_json_write_object_end(w); 766 767 return 0; 768 } 769 770 struct rpc_bdev_get_bdevs { 771 char *name; 772 uint64_t timeout; 773 }; 774 775 struct rpc_bdev_get_bdevs_ctx { 776 struct rpc_bdev_get_bdevs rpc; 777 struct spdk_jsonrpc_request *request; 778 struct spdk_poller *poller; 779 uint64_t timeout_ticks; 780 }; 781 782 static void 783 free_rpc_bdev_get_bdevs(struct rpc_bdev_get_bdevs *r) 784 { 785 free(r->name); 786 } 787 788 static const struct spdk_json_object_decoder rpc_bdev_get_bdevs_decoders[] = { 789 {"name", offsetof(struct rpc_bdev_get_bdevs, name), spdk_json_decode_string, true}, 790 {"timeout", offsetof(struct rpc_bdev_get_bdevs, timeout), spdk_json_decode_uint64, true}, 791 }; 792 793 static void 794 rpc_bdev_get_bdev_cb(struct spdk_bdev_desc *desc, int rc, void *cb_arg) 795 { 796 struct spdk_jsonrpc_request *request = cb_arg; 797 struct spdk_json_write_ctx *w; 798 799 if (rc == 0) { 800 w = spdk_jsonrpc_begin_result(request); 801 802 spdk_json_write_array_begin(w); 803 rpc_dump_bdev_info(w, spdk_bdev_desc_get_bdev(desc)); 804 spdk_json_write_array_end(w); 805 spdk_jsonrpc_end_result(request, w); 806 807 spdk_bdev_close(desc); 808 } else { 809 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 810 } 811 } 812 813 static void 814 rpc_bdev_get_bdevs(struct spdk_jsonrpc_request *request, 815 const struct spdk_json_val *params) 816 { 817 struct rpc_bdev_get_bdevs req = {}; 818 struct spdk_bdev_open_async_opts opts = {}; 819 struct spdk_json_write_ctx *w; 820 int rc; 821 822 if (params && spdk_json_decode_object(params, rpc_bdev_get_bdevs_decoders, 823 SPDK_COUNTOF(rpc_bdev_get_bdevs_decoders), 824 &req)) { 825 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 826 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 827 "spdk_json_decode_object failed"); 828 free_rpc_bdev_get_bdevs(&req); 829 return; 830 } 831 832 if (req.name) { 833 opts.size = sizeof(opts); 834 opts.timeout_ms = req.timeout; 835 836 rc = spdk_bdev_open_async(req.name, false, dummy_bdev_event_cb, NULL, &opts, 837 rpc_bdev_get_bdev_cb, request); 838 if (rc != 0) { 839 SPDK_ERRLOG("spdk_bdev_open_async failed for '%s': rc=%d\n", req.name, rc); 840 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 841 } 842 843 free_rpc_bdev_get_bdevs(&req); 844 return; 845 } 846 847 free_rpc_bdev_get_bdevs(&req); 848 849 w = spdk_jsonrpc_begin_result(request); 850 spdk_json_write_array_begin(w); 851 852 spdk_for_each_bdev(w, rpc_dump_bdev_info); 853 854 spdk_json_write_array_end(w); 855 856 spdk_jsonrpc_end_result(request, w); 857 } 858 SPDK_RPC_REGISTER("bdev_get_bdevs", rpc_bdev_get_bdevs, SPDK_RPC_RUNTIME) 859 860 struct rpc_bdev_set_qd_sampling_period { 861 char *name; 862 uint64_t period; 863 }; 864 865 static void 866 free_rpc_bdev_set_qd_sampling_period(struct rpc_bdev_set_qd_sampling_period *r) 867 { 868 free(r->name); 869 } 870 871 static const struct spdk_json_object_decoder 872 rpc_bdev_set_qd_sampling_period_decoders[] = { 873 {"name", offsetof(struct rpc_bdev_set_qd_sampling_period, name), spdk_json_decode_string}, 874 {"period", offsetof(struct rpc_bdev_set_qd_sampling_period, period), spdk_json_decode_uint64}, 875 }; 876 877 static void 878 rpc_bdev_set_qd_sampling_period(struct spdk_jsonrpc_request *request, 879 const struct spdk_json_val *params) 880 { 881 struct rpc_bdev_set_qd_sampling_period req = {0}; 882 struct spdk_bdev_desc *desc; 883 int rc; 884 885 if (spdk_json_decode_object(params, rpc_bdev_set_qd_sampling_period_decoders, 886 SPDK_COUNTOF(rpc_bdev_set_qd_sampling_period_decoders), 887 &req)) { 888 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 889 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 890 "spdk_json_decode_object failed"); 891 goto cleanup; 892 } 893 894 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 895 if (rc != 0) { 896 SPDK_ERRLOG("Failed to open bdev '%s': %d\n", req.name, rc); 897 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 898 goto cleanup; 899 } 900 901 spdk_bdev_set_qd_sampling_period(spdk_bdev_desc_get_bdev(desc), req.period); 902 spdk_jsonrpc_send_bool_response(request, true); 903 904 spdk_bdev_close(desc); 905 906 cleanup: 907 free_rpc_bdev_set_qd_sampling_period(&req); 908 } 909 SPDK_RPC_REGISTER("bdev_set_qd_sampling_period", 910 rpc_bdev_set_qd_sampling_period, 911 SPDK_RPC_RUNTIME) 912 913 struct rpc_bdev_set_qos_limit { 914 char *name; 915 uint64_t limits[SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES]; 916 }; 917 918 static void 919 free_rpc_bdev_set_qos_limit(struct rpc_bdev_set_qos_limit *r) 920 { 921 free(r->name); 922 } 923 924 static const struct spdk_json_object_decoder rpc_bdev_set_qos_limit_decoders[] = { 925 {"name", offsetof(struct rpc_bdev_set_qos_limit, name), spdk_json_decode_string}, 926 { 927 "rw_ios_per_sec", offsetof(struct rpc_bdev_set_qos_limit, 928 limits[SPDK_BDEV_QOS_RW_IOPS_RATE_LIMIT]), 929 spdk_json_decode_uint64, true 930 }, 931 { 932 "rw_mbytes_per_sec", offsetof(struct rpc_bdev_set_qos_limit, 933 limits[SPDK_BDEV_QOS_RW_BPS_RATE_LIMIT]), 934 spdk_json_decode_uint64, true 935 }, 936 { 937 "r_mbytes_per_sec", offsetof(struct rpc_bdev_set_qos_limit, 938 limits[SPDK_BDEV_QOS_R_BPS_RATE_LIMIT]), 939 spdk_json_decode_uint64, true 940 }, 941 { 942 "w_mbytes_per_sec", offsetof(struct rpc_bdev_set_qos_limit, 943 limits[SPDK_BDEV_QOS_W_BPS_RATE_LIMIT]), 944 spdk_json_decode_uint64, true 945 }, 946 }; 947 948 static void 949 rpc_bdev_set_qos_limit_complete(void *cb_arg, int status) 950 { 951 struct spdk_jsonrpc_request *request = cb_arg; 952 953 if (status != 0) { 954 spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, 955 "Failed to configure rate limit: %s", 956 spdk_strerror(-status)); 957 return; 958 } 959 960 spdk_jsonrpc_send_bool_response(request, true); 961 } 962 963 static void 964 rpc_bdev_set_qos_limit(struct spdk_jsonrpc_request *request, 965 const struct spdk_json_val *params) 966 { 967 struct rpc_bdev_set_qos_limit req = {NULL, {UINT64_MAX, UINT64_MAX, UINT64_MAX, UINT64_MAX}}; 968 struct spdk_bdev_desc *desc; 969 int i, rc; 970 971 if (spdk_json_decode_object(params, rpc_bdev_set_qos_limit_decoders, 972 SPDK_COUNTOF(rpc_bdev_set_qos_limit_decoders), 973 &req)) { 974 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 975 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 976 "spdk_json_decode_object failed"); 977 goto cleanup; 978 } 979 980 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 981 if (rc != 0) { 982 SPDK_ERRLOG("Failed to open bdev '%s': %d\n", req.name, rc); 983 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 984 goto cleanup; 985 } 986 987 for (i = 0; i < SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES; i++) { 988 if (req.limits[i] != UINT64_MAX) { 989 break; 990 } 991 } 992 if (i == SPDK_BDEV_QOS_NUM_RATE_LIMIT_TYPES) { 993 SPDK_ERRLOG("no rate limits specified\n"); 994 spdk_bdev_close(desc); 995 spdk_jsonrpc_send_error_response(request, -EINVAL, "No rate limits specified"); 996 goto cleanup; 997 } 998 999 spdk_bdev_set_qos_rate_limits(spdk_bdev_desc_get_bdev(desc), req.limits, 1000 rpc_bdev_set_qos_limit_complete, request); 1001 1002 spdk_bdev_close(desc); 1003 1004 cleanup: 1005 free_rpc_bdev_set_qos_limit(&req); 1006 } 1007 1008 SPDK_RPC_REGISTER("bdev_set_qos_limit", rpc_bdev_set_qos_limit, SPDK_RPC_RUNTIME) 1009 1010 /* SPDK_RPC_ENABLE_BDEV_HISTOGRAM */ 1011 1012 struct rpc_bdev_enable_histogram_request { 1013 char *name; 1014 bool enable; 1015 }; 1016 1017 static void 1018 free_rpc_bdev_enable_histogram_request(struct rpc_bdev_enable_histogram_request *r) 1019 { 1020 free(r->name); 1021 } 1022 1023 static const struct spdk_json_object_decoder rpc_bdev_enable_histogram_request_decoders[] = { 1024 {"name", offsetof(struct rpc_bdev_enable_histogram_request, name), spdk_json_decode_string}, 1025 {"enable", offsetof(struct rpc_bdev_enable_histogram_request, enable), spdk_json_decode_bool}, 1026 }; 1027 1028 static void 1029 bdev_histogram_status_cb(void *cb_arg, int status) 1030 { 1031 struct spdk_jsonrpc_request *request = cb_arg; 1032 1033 if (status == 0) { 1034 spdk_jsonrpc_send_bool_response(request, true); 1035 } else { 1036 spdk_jsonrpc_send_error_response(request, status, spdk_strerror(-status)); 1037 } 1038 } 1039 1040 static void 1041 rpc_bdev_enable_histogram(struct spdk_jsonrpc_request *request, 1042 const struct spdk_json_val *params) 1043 { 1044 struct rpc_bdev_enable_histogram_request req = {NULL}; 1045 struct spdk_bdev_desc *desc; 1046 int rc; 1047 1048 if (spdk_json_decode_object(params, rpc_bdev_enable_histogram_request_decoders, 1049 SPDK_COUNTOF(rpc_bdev_enable_histogram_request_decoders), 1050 &req)) { 1051 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 1052 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 1053 "spdk_json_decode_object failed"); 1054 goto cleanup; 1055 } 1056 1057 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 1058 if (rc != 0) { 1059 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 1060 goto cleanup; 1061 } 1062 1063 spdk_bdev_histogram_enable(spdk_bdev_desc_get_bdev(desc), bdev_histogram_status_cb, 1064 request, req.enable); 1065 1066 spdk_bdev_close(desc); 1067 1068 cleanup: 1069 free_rpc_bdev_enable_histogram_request(&req); 1070 } 1071 1072 SPDK_RPC_REGISTER("bdev_enable_histogram", rpc_bdev_enable_histogram, SPDK_RPC_RUNTIME) 1073 1074 /* SPDK_RPC_GET_BDEV_HISTOGRAM */ 1075 1076 struct rpc_bdev_get_histogram_request { 1077 char *name; 1078 }; 1079 1080 static const struct spdk_json_object_decoder rpc_bdev_get_histogram_request_decoders[] = { 1081 {"name", offsetof(struct rpc_bdev_get_histogram_request, name), spdk_json_decode_string} 1082 }; 1083 1084 static void 1085 free_rpc_bdev_get_histogram_request(struct rpc_bdev_get_histogram_request *r) 1086 { 1087 free(r->name); 1088 } 1089 1090 static void 1091 _rpc_bdev_histogram_data_cb(void *cb_arg, int status, struct spdk_histogram_data *histogram) 1092 { 1093 struct spdk_jsonrpc_request *request = cb_arg; 1094 struct spdk_json_write_ctx *w; 1095 int rc; 1096 char *encoded_histogram; 1097 size_t src_len, dst_len; 1098 1099 1100 if (status != 0) { 1101 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 1102 spdk_strerror(-status)); 1103 goto invalid; 1104 } 1105 1106 src_len = SPDK_HISTOGRAM_NUM_BUCKETS(histogram) * sizeof(uint64_t); 1107 dst_len = spdk_base64_get_encoded_strlen(src_len) + 1; 1108 1109 encoded_histogram = malloc(dst_len); 1110 if (encoded_histogram == NULL) { 1111 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 1112 spdk_strerror(ENOMEM)); 1113 goto invalid; 1114 } 1115 1116 rc = spdk_base64_encode(encoded_histogram, histogram->bucket, src_len); 1117 if (rc != 0) { 1118 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 1119 spdk_strerror(-rc)); 1120 goto free_encoded_histogram; 1121 } 1122 1123 w = spdk_jsonrpc_begin_result(request); 1124 spdk_json_write_object_begin(w); 1125 spdk_json_write_named_string(w, "histogram", encoded_histogram); 1126 spdk_json_write_named_int64(w, "bucket_shift", histogram->bucket_shift); 1127 spdk_json_write_named_int64(w, "tsc_rate", spdk_get_ticks_hz()); 1128 spdk_json_write_object_end(w); 1129 spdk_jsonrpc_end_result(request, w); 1130 1131 free_encoded_histogram: 1132 free(encoded_histogram); 1133 invalid: 1134 spdk_histogram_data_free(histogram); 1135 } 1136 1137 static void 1138 rpc_bdev_get_histogram(struct spdk_jsonrpc_request *request, 1139 const struct spdk_json_val *params) 1140 { 1141 struct rpc_bdev_get_histogram_request req = {NULL}; 1142 struct spdk_histogram_data *histogram; 1143 struct spdk_bdev_desc *desc; 1144 int rc; 1145 1146 if (spdk_json_decode_object(params, rpc_bdev_get_histogram_request_decoders, 1147 SPDK_COUNTOF(rpc_bdev_get_histogram_request_decoders), 1148 &req)) { 1149 SPDK_ERRLOG("spdk_json_decode_object failed\n"); 1150 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, 1151 "spdk_json_decode_object failed"); 1152 goto cleanup; 1153 } 1154 1155 rc = spdk_bdev_open_ext(req.name, false, dummy_bdev_event_cb, NULL, &desc); 1156 if (rc != 0) { 1157 spdk_jsonrpc_send_error_response(request, rc, spdk_strerror(-rc)); 1158 goto cleanup; 1159 } 1160 1161 histogram = spdk_histogram_data_alloc(); 1162 if (histogram == NULL) { 1163 spdk_bdev_close(desc); 1164 spdk_jsonrpc_send_error_response(request, -ENOMEM, spdk_strerror(ENOMEM)); 1165 goto cleanup; 1166 } 1167 1168 spdk_bdev_histogram_get(spdk_bdev_desc_get_bdev(desc), histogram, 1169 _rpc_bdev_histogram_data_cb, request); 1170 1171 spdk_bdev_close(desc); 1172 1173 cleanup: 1174 free_rpc_bdev_get_histogram_request(&req); 1175 } 1176 1177 SPDK_RPC_REGISTER("bdev_get_histogram", rpc_bdev_get_histogram, SPDK_RPC_RUNTIME) 1178