1// SPDX-License-Identifier: GPL-2.0 2/* 3 * NVMe admin command implementation. 4 * Copyright (c) 2015-2016 HGST, a Western Digital Company. 5 */ 6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7#include <linux/module.h> 8#include <linux/rculist.h> 9#include <linux/part_stat.h> 10 11#include <generated/utsrelease.h> 12#include <asm/unaligned.h> 13#include "nvmet.h" 14 15u32 nvmet_get_log_page_len(struct nvme_command *cmd) 16{ 17 u32 len = le16_to_cpu(cmd->get_log_page.numdu); 18 19 len <<= 16; 20 len += le16_to_cpu(cmd->get_log_page.numdl); 21 /* NUMD is a 0's based value */ 22 len += 1; 23 len *= sizeof(u32); 24 25 return len; 26} 27 28static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10) 29{ 30 switch (cdw10 & 0xff) { 31 case NVME_FEAT_HOST_ID: 32 return sizeof(req->sq->ctrl->hostid); 33 default: 34 return 0; 35 } 36} 37 38u64 nvmet_get_log_page_offset(struct nvme_command *cmd) 39{ 40 return le64_to_cpu(cmd->get_log_page.lpo); 41} 42 43static void nvmet_execute_get_log_page_noop(struct nvmet_req *req) 44{ 45 nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->transfer_len)); 46} 47 48static void nvmet_execute_get_log_page_error(struct nvmet_req *req) 49{ 50 struct nvmet_ctrl *ctrl = req->sq->ctrl; 51 unsigned long flags; 52 off_t offset = 0; 53 u64 slot; 54 u64 i; 55 56 spin_lock_irqsave(&ctrl->error_lock, flags); 57 slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS; 58 59 for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) { 60 if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot], 61 sizeof(struct nvme_error_slot))) 62 break; 63 64 if (slot == 0) 65 slot = NVMET_ERROR_LOG_SLOTS - 1; 66 else 67 slot--; 68 offset += sizeof(struct nvme_error_slot); 69 } 70 spin_unlock_irqrestore(&ctrl->error_lock, flags); 71 nvmet_req_complete(req, 0); 72} 73 74static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, 75 struct nvme_smart_log *slog) 76{ 77 struct nvmet_ns *ns; 78 u64 host_reads, host_writes, data_units_read, data_units_written; 79 80 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid); 81 if (!ns) { 82 pr_err("Could not find namespace id : %d\n", 83 le32_to_cpu(req->cmd->get_log_page.nsid)); 84 req->error_loc = offsetof(struct nvme_rw_command, nsid); 85 return NVME_SC_INVALID_NS; 86 } 87 88 /* we don't have the right data for file backed ns */ 89 if (!ns->bdev) 90 goto out; 91 92 host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); 93 data_units_read = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part, 94 sectors[READ]), 1000); 95 host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); 96 data_units_written = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part, 97 sectors[WRITE]), 1000); 98 99 put_unaligned_le64(host_reads, &slog->host_reads[0]); 100 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 101 put_unaligned_le64(host_writes, &slog->host_writes[0]); 102 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 103out: 104 nvmet_put_namespace(ns); 105 106 return NVME_SC_SUCCESS; 107} 108 109static u16 nvmet_get_smart_log_all(struct nvmet_req *req, 110 struct nvme_smart_log *slog) 111{ 112 u64 host_reads = 0, host_writes = 0; 113 u64 data_units_read = 0, data_units_written = 0; 114 struct nvmet_ns *ns; 115 struct nvmet_ctrl *ctrl; 116 unsigned long idx; 117 118 ctrl = req->sq->ctrl; 119 xa_for_each(&ctrl->subsys->namespaces, idx, ns) { 120 /* we don't have the right data for file backed ns */ 121 if (!ns->bdev) 122 continue; 123 host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); 124 data_units_read += DIV_ROUND_UP( 125 part_stat_read(ns->bdev->bd_part, sectors[READ]), 1000); 126 host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]); 127 data_units_written += DIV_ROUND_UP( 128 part_stat_read(ns->bdev->bd_part, sectors[WRITE]), 1000); 129 } 130 131 put_unaligned_le64(host_reads, &slog->host_reads[0]); 132 put_unaligned_le64(data_units_read, &slog->data_units_read[0]); 133 put_unaligned_le64(host_writes, &slog->host_writes[0]); 134 put_unaligned_le64(data_units_written, &slog->data_units_written[0]); 135 136 return NVME_SC_SUCCESS; 137} 138 139static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) 140{ 141 struct nvme_smart_log *log; 142 u16 status = NVME_SC_INTERNAL; 143 unsigned long flags; 144 145 if (req->transfer_len != sizeof(*log)) 146 goto out; 147 148 log = kzalloc(sizeof(*log), GFP_KERNEL); 149 if (!log) 150 goto out; 151 152 if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL)) 153 status = nvmet_get_smart_log_all(req, log); 154 else 155 status = nvmet_get_smart_log_nsid(req, log); 156 if (status) 157 goto out_free_log; 158 159 spin_lock_irqsave(&req->sq->ctrl->error_lock, flags); 160 put_unaligned_le64(req->sq->ctrl->err_counter, 161 &log->num_err_log_entries); 162 spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags); 163 164 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 165out_free_log: 166 kfree(log); 167out: 168 nvmet_req_complete(req, status); 169} 170 171static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) 172{ 173 u16 status = NVME_SC_INTERNAL; 174 struct nvme_effects_log *log; 175 176 log = kzalloc(sizeof(*log), GFP_KERNEL); 177 if (!log) 178 goto out; 179 180 log->acs[nvme_admin_get_log_page] = cpu_to_le32(1 << 0); 181 log->acs[nvme_admin_identify] = cpu_to_le32(1 << 0); 182 log->acs[nvme_admin_abort_cmd] = cpu_to_le32(1 << 0); 183 log->acs[nvme_admin_set_features] = cpu_to_le32(1 << 0); 184 log->acs[nvme_admin_get_features] = cpu_to_le32(1 << 0); 185 log->acs[nvme_admin_async_event] = cpu_to_le32(1 << 0); 186 log->acs[nvme_admin_keep_alive] = cpu_to_le32(1 << 0); 187 188 log->iocs[nvme_cmd_read] = cpu_to_le32(1 << 0); 189 log->iocs[nvme_cmd_write] = cpu_to_le32(1 << 0); 190 log->iocs[nvme_cmd_flush] = cpu_to_le32(1 << 0); 191 log->iocs[nvme_cmd_dsm] = cpu_to_le32(1 << 0); 192 log->iocs[nvme_cmd_write_zeroes] = cpu_to_le32(1 << 0); 193 194 status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); 195 196 kfree(log); 197out: 198 nvmet_req_complete(req, status); 199} 200 201static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req) 202{ 203 struct nvmet_ctrl *ctrl = req->sq->ctrl; 204 u16 status = NVME_SC_INTERNAL; 205 size_t len; 206 207 if (req->transfer_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32)) 208 goto out; 209 210 mutex_lock(&ctrl->lock); 211 if (ctrl->nr_changed_ns == U32_MAX) 212 len = sizeof(__le32); 213 else 214 len = ctrl->nr_changed_ns * sizeof(__le32); 215 status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len); 216 if (!status) 217 status = nvmet_zero_sgl(req, len, req->transfer_len - len); 218 ctrl->nr_changed_ns = 0; 219 nvmet_clear_aen_bit(req, NVME_AEN_BIT_NS_ATTR); 220 mutex_unlock(&ctrl->lock); 221out: 222 nvmet_req_complete(req, status); 223} 224 225static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid, 226 struct nvme_ana_group_desc *desc) 227{ 228 struct nvmet_ctrl *ctrl = req->sq->ctrl; 229 struct nvmet_ns *ns; 230 unsigned long idx; 231 u32 count = 0; 232 233 if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) { 234 xa_for_each(&ctrl->subsys->namespaces, idx, ns) 235 if (ns->anagrpid == grpid) 236 desc->nsids[count++] = cpu_to_le32(ns->nsid); 237 } 238 239 desc->grpid = cpu_to_le32(grpid); 240 desc->nnsids = cpu_to_le32(count); 241 desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 242 desc->state = req->port->ana_state[grpid]; 243 memset(desc->rsvd17, 0, sizeof(desc->rsvd17)); 244 return sizeof(struct nvme_ana_group_desc) + count * sizeof(__le32); 245} 246 247static void nvmet_execute_get_log_page_ana(struct nvmet_req *req) 248{ 249 struct nvme_ana_rsp_hdr hdr = { 0, }; 250 struct nvme_ana_group_desc *desc; 251 size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */ 252 size_t len; 253 u32 grpid; 254 u16 ngrps = 0; 255 u16 status; 256 257 status = NVME_SC_INTERNAL; 258 desc = kmalloc(sizeof(struct nvme_ana_group_desc) + 259 NVMET_MAX_NAMESPACES * sizeof(__le32), GFP_KERNEL); 260 if (!desc) 261 goto out; 262 263 down_read(&nvmet_ana_sem); 264 for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 265 if (!nvmet_ana_group_enabled[grpid]) 266 continue; 267 len = nvmet_format_ana_group(req, grpid, desc); 268 status = nvmet_copy_to_sgl(req, offset, desc, len); 269 if (status) 270 break; 271 offset += len; 272 ngrps++; 273 } 274 for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) { 275 if (nvmet_ana_group_enabled[grpid]) 276 ngrps++; 277 } 278 279 hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt); 280 hdr.ngrps = cpu_to_le16(ngrps); 281 nvmet_clear_aen_bit(req, NVME_AEN_BIT_ANA_CHANGE); 282 up_read(&nvmet_ana_sem); 283 284 kfree(desc); 285 286 /* copy the header last once we know the number of groups */ 287 status = nvmet_copy_to_sgl(req, 0, &hdr, sizeof(hdr)); 288out: 289 nvmet_req_complete(req, status); 290} 291 292static void nvmet_execute_get_log_page(struct nvmet_req *req) 293{ 294 if (!nvmet_check_transfer_len(req, nvmet_get_log_page_len(req->cmd))) 295 return; 296 297 switch (req->cmd->get_log_page.lid) { 298 case NVME_LOG_ERROR: 299 return nvmet_execute_get_log_page_error(req); 300 case NVME_LOG_SMART: 301 return nvmet_execute_get_log_page_smart(req); 302 case NVME_LOG_FW_SLOT: 303 /* 304 * We only support a single firmware slot which always is 305 * active, so we can zero out the whole firmware slot log and 306 * still claim to fully implement this mandatory log page. 307 */ 308 return nvmet_execute_get_log_page_noop(req); 309 case NVME_LOG_CHANGED_NS: 310 return nvmet_execute_get_log_changed_ns(req); 311 case NVME_LOG_CMD_EFFECTS: 312 return nvmet_execute_get_log_cmd_effects_ns(req); 313 case NVME_LOG_ANA: 314 return nvmet_execute_get_log_page_ana(req); 315 } 316 pr_debug("unhandled lid %d on qid %d\n", 317 req->cmd->get_log_page.lid, req->sq->qid); 318 req->error_loc = offsetof(struct nvme_get_log_page_command, lid); 319 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR); 320} 321 322static void nvmet_id_set_model_number(struct nvme_id_ctrl *id, 323 struct nvmet_subsys *subsys) 324{ 325 const char *model = NVMET_DEFAULT_CTRL_MODEL; 326 struct nvmet_subsys_model *subsys_model; 327 328 rcu_read_lock(); 329 subsys_model = rcu_dereference(subsys->model); 330 if (subsys_model) 331 model = subsys_model->number; 332 memcpy_and_pad(id->mn, sizeof(id->mn), model, strlen(model), ' '); 333 rcu_read_unlock(); 334} 335 336static void nvmet_execute_identify_ctrl(struct nvmet_req *req) 337{ 338 struct nvmet_ctrl *ctrl = req->sq->ctrl; 339 struct nvme_id_ctrl *id; 340 u32 cmd_capsule_size; 341 u16 status = 0; 342 343 id = kzalloc(sizeof(*id), GFP_KERNEL); 344 if (!id) { 345 status = NVME_SC_INTERNAL; 346 goto out; 347 } 348 349 /* XXX: figure out how to assign real vendors IDs. */ 350 id->vid = 0; 351 id->ssvid = 0; 352 353 memset(id->sn, ' ', sizeof(id->sn)); 354 bin2hex(id->sn, &ctrl->subsys->serial, 355 min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2)); 356 nvmet_id_set_model_number(id, ctrl->subsys); 357 memcpy_and_pad(id->fr, sizeof(id->fr), 358 UTS_RELEASE, strlen(UTS_RELEASE), ' '); 359 360 id->rab = 6; 361 362 /* 363 * XXX: figure out how we can assign a IEEE OUI, but until then 364 * the safest is to leave it as zeroes. 365 */ 366 367 /* we support multiple ports, multiples hosts and ANA: */ 368 id->cmic = (1 << 0) | (1 << 1) | (1 << 3); 369 370 /* Limit MDTS according to transport capability */ 371 if (ctrl->ops->get_mdts) 372 id->mdts = ctrl->ops->get_mdts(ctrl); 373 else 374 id->mdts = 0; 375 376 id->cntlid = cpu_to_le16(ctrl->cntlid); 377 id->ver = cpu_to_le32(ctrl->subsys->ver); 378 379 /* XXX: figure out what to do about RTD3R/RTD3 */ 380 id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL); 381 id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT | 382 NVME_CTRL_ATTR_TBKAS); 383 384 id->oacs = 0; 385 386 /* 387 * We don't really have a practical limit on the number of abort 388 * comands. But we don't do anything useful for abort either, so 389 * no point in allowing more abort commands than the spec requires. 390 */ 391 id->acl = 3; 392 393 id->aerl = NVMET_ASYNC_EVENTS - 1; 394 395 /* first slot is read-only, only one slot supported */ 396 id->frmw = (1 << 0) | (1 << 1); 397 id->lpa = (1 << 0) | (1 << 1) | (1 << 2); 398 id->elpe = NVMET_ERROR_LOG_SLOTS - 1; 399 id->npss = 0; 400 401 /* We support keep-alive timeout in granularity of seconds */ 402 id->kas = cpu_to_le16(NVMET_KAS); 403 404 id->sqes = (0x6 << 4) | 0x6; 405 id->cqes = (0x4 << 4) | 0x4; 406 407 /* no enforcement soft-limit for maxcmd - pick arbitrary high value */ 408 id->maxcmd = cpu_to_le16(NVMET_MAX_CMD); 409 410 id->nn = cpu_to_le32(ctrl->subsys->max_nsid); 411 id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES); 412 id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | 413 NVME_CTRL_ONCS_WRITE_ZEROES); 414 415 /* XXX: don't report vwc if the underlying device is write through */ 416 id->vwc = NVME_CTRL_VWC_PRESENT; 417 418 /* 419 * We can't support atomic writes bigger than a LBA without support 420 * from the backend device. 421 */ 422 id->awun = 0; 423 id->awupf = 0; 424 425 id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */ 426 if (ctrl->ops->flags & NVMF_KEYED_SGLS) 427 id->sgls |= cpu_to_le32(1 << 2); 428 if (req->port->inline_data_size) 429 id->sgls |= cpu_to_le32(1 << 20); 430 431 strlcpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn)); 432 433 /* 434 * Max command capsule size is sqe + in-capsule data size. 435 * Disable in-capsule data for Metadata capable controllers. 436 */ 437 cmd_capsule_size = sizeof(struct nvme_command); 438 if (!ctrl->pi_support) 439 cmd_capsule_size += req->port->inline_data_size; 440 id->ioccsz = cpu_to_le32(cmd_capsule_size / 16); 441 442 /* Max response capsule size is cqe */ 443 id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16); 444 445 id->msdbd = ctrl->ops->msdbd; 446 447 id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4); 448 id->anatt = 10; /* random value */ 449 id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS); 450 id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS); 451 452 /* 453 * Meh, we don't really support any power state. Fake up the same 454 * values that qemu does. 455 */ 456 id->psd[0].max_power = cpu_to_le16(0x9c4); 457 id->psd[0].entry_lat = cpu_to_le32(0x10); 458 id->psd[0].exit_lat = cpu_to_le32(0x4); 459 460 id->nwpc = 1 << 0; /* write protect and no write protect */ 461 462 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 463 464 kfree(id); 465out: 466 nvmet_req_complete(req, status); 467} 468 469static void nvmet_execute_identify_ns(struct nvmet_req *req) 470{ 471 struct nvmet_ctrl *ctrl = req->sq->ctrl; 472 struct nvme_id_ns *id; 473 u16 status = 0; 474 475 if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) { 476 req->error_loc = offsetof(struct nvme_identify, nsid); 477 status = NVME_SC_INVALID_NS | NVME_SC_DNR; 478 goto out; 479 } 480 481 id = kzalloc(sizeof(*id), GFP_KERNEL); 482 if (!id) { 483 status = NVME_SC_INTERNAL; 484 goto out; 485 } 486 487 /* return an all zeroed buffer if we can't find an active namespace */ 488 req->ns = nvmet_find_namespace(ctrl, req->cmd->identify.nsid); 489 if (!req->ns) { 490 status = 0; 491 goto done; 492 } 493 494 nvmet_ns_revalidate(req->ns); 495 496 /* 497 * nuse = ncap = nsze isn't always true, but we have no way to find 498 * that out from the underlying device. 499 */ 500 id->ncap = id->nsze = 501 cpu_to_le64(req->ns->size >> req->ns->blksize_shift); 502 switch (req->port->ana_state[req->ns->anagrpid]) { 503 case NVME_ANA_INACCESSIBLE: 504 case NVME_ANA_PERSISTENT_LOSS: 505 break; 506 default: 507 id->nuse = id->nsze; 508 break; 509 } 510 511 if (req->ns->bdev) 512 nvmet_bdev_set_limits(req->ns->bdev, id); 513 514 /* 515 * We just provide a single LBA format that matches what the 516 * underlying device reports. 517 */ 518 id->nlbaf = 0; 519 id->flbas = 0; 520 521 /* 522 * Our namespace might always be shared. Not just with other 523 * controllers, but also with any other user of the block device. 524 */ 525 id->nmic = (1 << 0); 526 id->anagrpid = cpu_to_le32(req->ns->anagrpid); 527 528 memcpy(&id->nguid, &req->ns->nguid, sizeof(id->nguid)); 529 530 id->lbaf[0].ds = req->ns->blksize_shift; 531 532 if (ctrl->pi_support && nvmet_ns_has_pi(req->ns)) { 533 id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST | 534 NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 | 535 NVME_NS_DPC_PI_TYPE3; 536 id->mc = NVME_MC_EXTENDED_LBA; 537 id->dps = req->ns->pi_type; 538 id->flbas = NVME_NS_FLBAS_META_EXT; 539 id->lbaf[0].ms = cpu_to_le16(req->ns->metadata_size); 540 } 541 542 if (req->ns->readonly) 543 id->nsattr |= (1 << 0); 544done: 545 if (!status) 546 status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); 547 548 kfree(id); 549out: 550 nvmet_req_complete(req, status); 551} 552 553static void nvmet_execute_identify_nslist(struct nvmet_req *req) 554{ 555 static const int buf_size = NVME_IDENTIFY_DATA_SIZE; 556 struct nvmet_ctrl *ctrl = req->sq->ctrl; 557 struct nvmet_ns *ns; 558 unsigned long idx; 559 u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid); 560 __le32 *list; 561 u16 status = 0; 562 int i = 0; 563 564 list = kzalloc(buf_size, GFP_KERNEL); 565 if (!list) { 566 status = NVME_SC_INTERNAL; 567 goto out; 568 } 569 570 xa_for_each(&ctrl->subsys->namespaces, idx, ns) { 571 if (ns->nsid <= min_nsid) 572 continue; 573 list[i++] = cpu_to_le32(ns->nsid); 574 if (i == buf_size / sizeof(__le32)) 575 break; 576 } 577 578 status = nvmet_copy_to_sgl(req, 0, list, buf_size); 579 580 kfree(list); 581out: 582 nvmet_req_complete(req, status); 583} 584 585static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len, 586 void *id, off_t *off) 587{ 588 struct nvme_ns_id_desc desc = { 589 .nidt = type, 590 .nidl = len, 591 }; 592 u16 status; 593 594 status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc)); 595 if (status) 596 return status; 597 *off += sizeof(desc); 598 599 status = nvmet_copy_to_sgl(req, *off, id, len); 600 if (status) 601 return status; 602 *off += len; 603 604 return 0; 605} 606 607static void nvmet_execute_identify_desclist(struct nvmet_req *req) 608{ 609 struct nvmet_ns *ns; 610 u16 status = 0; 611 off_t off = 0; 612 613 ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid); 614 if (!ns) { 615 req->error_loc = offsetof(struct nvme_identify, nsid); 616 status = NVME_SC_INVALID_NS | NVME_SC_DNR; 617 goto out; 618 } 619 620 if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) { 621 status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID, 622 NVME_NIDT_UUID_LEN, 623 &ns->uuid, &off); 624 if (status) 625 goto out_put_ns; 626 } 627 if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) { 628 status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID, 629 NVME_NIDT_NGUID_LEN, 630 &ns->nguid, &off); 631 if (status) 632 goto out_put_ns; 633 } 634 635 if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off, 636 off) != NVME_IDENTIFY_DATA_SIZE - off) 637 status = NVME_SC_INTERNAL | NVME_SC_DNR; 638out_put_ns: 639 nvmet_put_namespace(ns); 640out: 641 nvmet_req_complete(req, status); 642} 643 644static void nvmet_execute_identify(struct nvmet_req *req) 645{ 646 if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE)) 647 return; 648 649 switch (req->cmd->identify.cns) { 650 case NVME_ID_CNS_NS: 651 return nvmet_execute_identify_ns(req); 652 case NVME_ID_CNS_CTRL: 653 return nvmet_execute_identify_ctrl(req); 654 case NVME_ID_CNS_NS_ACTIVE_LIST: 655 return nvmet_execute_identify_nslist(req); 656 case NVME_ID_CNS_NS_DESC_LIST: 657 return nvmet_execute_identify_desclist(req); 658 } 659 660 pr_debug("unhandled identify cns %d on qid %d\n", 661 req->cmd->identify.cns, req->sq->qid); 662 req->error_loc = offsetof(struct nvme_identify, cns); 663 nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR); 664} 665 666/* 667 * A "minimum viable" abort implementation: the command is mandatory in the 668 * spec, but we are not required to do any useful work. We couldn't really 669 * do a useful abort, so don't bother even with waiting for the command 670 * to be exectuted and return immediately telling the command to abort 671 * wasn't found. 672 */ 673static void nvmet_execute_abort(struct nvmet_req *req) 674{ 675 if (!nvmet_check_transfer_len(req, 0)) 676 return; 677 nvmet_set_result(req, 1); 678 nvmet_req_complete(req, 0); 679} 680 681static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req) 682{ 683 u16 status; 684 685 if (req->ns->file) 686 status = nvmet_file_flush(req); 687 else 688 status = nvmet_bdev_flush(req); 689 690 if (status) 691 pr_err("write protect flush failed nsid: %u\n", req->ns->nsid); 692 return status; 693} 694 695static u16 nvmet_set_feat_write_protect(struct nvmet_req *req) 696{ 697 u32 write_protect = le32_to_cpu(req->cmd->common.cdw11); 698 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 699 u16 status = NVME_SC_FEATURE_NOT_CHANGEABLE; 700 701 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->rw.nsid); 702 if (unlikely(!req->ns)) { 703 req->error_loc = offsetof(struct nvme_common_command, nsid); 704 return status; 705 } 706 707 mutex_lock(&subsys->lock); 708 switch (write_protect) { 709 case NVME_NS_WRITE_PROTECT: 710 req->ns->readonly = true; 711 status = nvmet_write_protect_flush_sync(req); 712 if (status) 713 req->ns->readonly = false; 714 break; 715 case NVME_NS_NO_WRITE_PROTECT: 716 req->ns->readonly = false; 717 status = 0; 718 break; 719 default: 720 break; 721 } 722 723 if (!status) 724 nvmet_ns_changed(subsys, req->ns->nsid); 725 mutex_unlock(&subsys->lock); 726 return status; 727} 728 729u16 nvmet_set_feat_kato(struct nvmet_req *req) 730{ 731 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 732 733 nvmet_stop_keep_alive_timer(req->sq->ctrl); 734 req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); 735 nvmet_start_keep_alive_timer(req->sq->ctrl); 736 737 nvmet_set_result(req, req->sq->ctrl->kato); 738 739 return 0; 740} 741 742u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask) 743{ 744 u32 val32 = le32_to_cpu(req->cmd->common.cdw11); 745 746 if (val32 & ~mask) { 747 req->error_loc = offsetof(struct nvme_common_command, cdw11); 748 return NVME_SC_INVALID_FIELD | NVME_SC_DNR; 749 } 750 751 WRITE_ONCE(req->sq->ctrl->aen_enabled, val32); 752 nvmet_set_result(req, val32); 753 754 return 0; 755} 756 757void nvmet_execute_set_features(struct nvmet_req *req) 758{ 759 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 760 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 761 u32 cdw11 = le32_to_cpu(req->cmd->common.cdw11); 762 u16 status = 0; 763 u16 nsqr; 764 u16 ncqr; 765 766 if (!nvmet_check_transfer_len(req, 0)) 767 return; 768 769 switch (cdw10 & 0xff) { 770 case NVME_FEAT_NUM_QUEUES: 771 ncqr = (cdw11 >> 16) & 0xffff; 772 nsqr = cdw11 & 0xffff; 773 if (ncqr == 0xffff || nsqr == 0xffff) { 774 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 775 break; 776 } 777 nvmet_set_result(req, 778 (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16)); 779 break; 780 case NVME_FEAT_KATO: 781 status = nvmet_set_feat_kato(req); 782 break; 783 case NVME_FEAT_ASYNC_EVENT: 784 status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL); 785 break; 786 case NVME_FEAT_HOST_ID: 787 status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; 788 break; 789 case NVME_FEAT_WRITE_PROTECT: 790 status = nvmet_set_feat_write_protect(req); 791 break; 792 default: 793 req->error_loc = offsetof(struct nvme_common_command, cdw10); 794 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 795 break; 796 } 797 798 nvmet_req_complete(req, status); 799} 800 801static u16 nvmet_get_feat_write_protect(struct nvmet_req *req) 802{ 803 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 804 u32 result; 805 806 req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->common.nsid); 807 if (!req->ns) { 808 req->error_loc = offsetof(struct nvme_common_command, nsid); 809 return NVME_SC_INVALID_NS | NVME_SC_DNR; 810 } 811 mutex_lock(&subsys->lock); 812 if (req->ns->readonly == true) 813 result = NVME_NS_WRITE_PROTECT; 814 else 815 result = NVME_NS_NO_WRITE_PROTECT; 816 nvmet_set_result(req, result); 817 mutex_unlock(&subsys->lock); 818 819 return 0; 820} 821 822void nvmet_get_feat_kato(struct nvmet_req *req) 823{ 824 nvmet_set_result(req, req->sq->ctrl->kato * 1000); 825} 826 827void nvmet_get_feat_async_event(struct nvmet_req *req) 828{ 829 nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled)); 830} 831 832void nvmet_execute_get_features(struct nvmet_req *req) 833{ 834 struct nvmet_subsys *subsys = req->sq->ctrl->subsys; 835 u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10); 836 u16 status = 0; 837 838 if (!nvmet_check_transfer_len(req, nvmet_feat_data_len(req, cdw10))) 839 return; 840 841 switch (cdw10 & 0xff) { 842 /* 843 * These features are mandatory in the spec, but we don't 844 * have a useful way to implement them. We'll eventually 845 * need to come up with some fake values for these. 846 */ 847#if 0 848 case NVME_FEAT_ARBITRATION: 849 break; 850 case NVME_FEAT_POWER_MGMT: 851 break; 852 case NVME_FEAT_TEMP_THRESH: 853 break; 854 case NVME_FEAT_ERR_RECOVERY: 855 break; 856 case NVME_FEAT_IRQ_COALESCE: 857 break; 858 case NVME_FEAT_IRQ_CONFIG: 859 break; 860 case NVME_FEAT_WRITE_ATOMIC: 861 break; 862#endif 863 case NVME_FEAT_ASYNC_EVENT: 864 nvmet_get_feat_async_event(req); 865 break; 866 case NVME_FEAT_VOLATILE_WC: 867 nvmet_set_result(req, 1); 868 break; 869 case NVME_FEAT_NUM_QUEUES: 870 nvmet_set_result(req, 871 (subsys->max_qid-1) | ((subsys->max_qid-1) << 16)); 872 break; 873 case NVME_FEAT_KATO: 874 nvmet_get_feat_kato(req); 875 break; 876 case NVME_FEAT_HOST_ID: 877 /* need 128-bit host identifier flag */ 878 if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) { 879 req->error_loc = 880 offsetof(struct nvme_common_command, cdw11); 881 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 882 break; 883 } 884 885 status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid, 886 sizeof(req->sq->ctrl->hostid)); 887 break; 888 case NVME_FEAT_WRITE_PROTECT: 889 status = nvmet_get_feat_write_protect(req); 890 break; 891 default: 892 req->error_loc = 893 offsetof(struct nvme_common_command, cdw10); 894 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; 895 break; 896 } 897 898 nvmet_req_complete(req, status); 899} 900 901void nvmet_execute_async_event(struct nvmet_req *req) 902{ 903 struct nvmet_ctrl *ctrl = req->sq->ctrl; 904 905 if (!nvmet_check_transfer_len(req, 0)) 906 return; 907 908 mutex_lock(&ctrl->lock); 909 if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) { 910 mutex_unlock(&ctrl->lock); 911 nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR); 912 return; 913 } 914 ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req; 915 mutex_unlock(&ctrl->lock); 916 917 schedule_work(&ctrl->async_event_work); 918} 919 920void nvmet_execute_keep_alive(struct nvmet_req *req) 921{ 922 struct nvmet_ctrl *ctrl = req->sq->ctrl; 923 924 if (!nvmet_check_transfer_len(req, 0)) 925 return; 926 927 pr_debug("ctrl %d update keep-alive timer for %d secs\n", 928 ctrl->cntlid, ctrl->kato); 929 930 mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ); 931 nvmet_req_complete(req, 0); 932} 933 934u16 nvmet_parse_admin_cmd(struct nvmet_req *req) 935{ 936 struct nvme_command *cmd = req->cmd; 937 u16 ret; 938 939 if (nvme_is_fabrics(cmd)) 940 return nvmet_parse_fabrics_cmd(req); 941 if (req->sq->ctrl->subsys->type == NVME_NQN_DISC) 942 return nvmet_parse_discovery_cmd(req); 943 944 ret = nvmet_check_ctrl_status(req, cmd); 945 if (unlikely(ret)) 946 return ret; 947 948 if (nvmet_req_passthru_ctrl(req)) 949 return nvmet_parse_passthru_admin_cmd(req); 950 951 switch (cmd->common.opcode) { 952 case nvme_admin_get_log_page: 953 req->execute = nvmet_execute_get_log_page; 954 return 0; 955 case nvme_admin_identify: 956 req->execute = nvmet_execute_identify; 957 return 0; 958 case nvme_admin_abort_cmd: 959 req->execute = nvmet_execute_abort; 960 return 0; 961 case nvme_admin_set_features: 962 req->execute = nvmet_execute_set_features; 963 return 0; 964 case nvme_admin_get_features: 965 req->execute = nvmet_execute_get_features; 966 return 0; 967 case nvme_admin_async_event: 968 req->execute = nvmet_execute_async_event; 969 return 0; 970 case nvme_admin_keep_alive: 971 req->execute = nvmet_execute_keep_alive; 972 return 0; 973 } 974 975 pr_debug("unhandled cmd %d on qid %d\n", cmd->common.opcode, 976 req->sq->qid); 977 req->error_loc = offsetof(struct nvme_common_command, opcode); 978 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; 979} 980