drivers/nvme/target/admin-cmd.c

   1 /*
   2  * NVMe admin command implementation.
   3  * Copyright (c) 2015-2016 HGST, a Western Digital Company.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15 #include <linux/module.h>
  16 #include <linux/rculist.h>
  17
  18 #include <generated/utsrelease.h>
  19 #include <asm/unaligned.h>
  20 #include "nvmet.h"
  21
  22 u32 nvmet_get_log_page_len(struct nvme_command *cmd)
  23 {
  24         u32 len = le16_to_cpu(cmd->get_log_page.numdu);
  25
  26         len <<= 16;
  27         len += le16_to_cpu(cmd->get_log_page.numdl);
  28         /* NUMD is a 0's based value */
  29         len += 1;
  30         len *= sizeof(u32);
  31
  32         return len;
  33 }
  34
  35 static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
  36 {
  37         nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->data_len));
  38 }
  39
  40 static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
  41                 struct nvme_smart_log *slog)
  42 {
  43         struct nvmet_ns *ns;
  44         u64 host_reads, host_writes, data_units_read, data_units_written;
  45
  46         ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid);
  47         if (!ns) {
  48                 pr_err("nvmet : Could not find namespace id : %d\n",
  49                                 le32_to_cpu(req->cmd->get_log_page.nsid));
  50                 return NVME_SC_INVALID_NS;
  51         }
  52
  53         /* we don't have the right data for file backed ns */
  54         if (!ns->bdev)
  55                 goto out;
  56
  57         host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]);
  58         data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]);
  59         host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]);
  60         data_units_written = part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
  61
  62         put_unaligned_le64(host_reads, &slog->host_reads[0]);
  63         put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
  64         put_unaligned_le64(host_writes, &slog->host_writes[0]);
  65         put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
  66 out:
  67         nvmet_put_namespace(ns);
  68
  69         return NVME_SC_SUCCESS;
  70 }
  71
  72 static u16 nvmet_get_smart_log_all(struct nvmet_req *req,
  73                 struct nvme_smart_log *slog)
  74 {
  75         u64 host_reads = 0, host_writes = 0;
  76         u64 data_units_read = 0, data_units_written = 0;
  77         struct nvmet_ns *ns;
  78         struct nvmet_ctrl *ctrl;
  79
  80         ctrl = req->sq->ctrl;
  81
  82         rcu_read_lock();
  83         list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) {
  84                 /* we don't have the right data for file backed ns */
  85                 if (!ns->bdev)
  86                         continue;
  87                 host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]);
  88                 data_units_read +=
  89                         part_stat_read(ns->bdev->bd_part, sectors[READ]);
  90                 host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]);
  91                 data_units_written +=
  92                         part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
  93
  94         }
  95         rcu_read_unlock();
  96
  97         put_unaligned_le64(host_reads, &slog->host_reads[0]);
  98         put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
  99         put_unaligned_le64(host_writes, &slog->host_writes[0]);
 100         put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
 101
 102         return NVME_SC_SUCCESS;
 103 }
 104
 105 static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
 106 {
 107         struct nvme_smart_log *log;
 108         u16 status = NVME_SC_INTERNAL;
 109
 110         if (req->data_len != sizeof(*log))
 111                 goto out;
 112
 113         log = kzalloc(sizeof(*log), GFP_KERNEL);
 114         if (!log)
 115                 goto out;
 116
 117         if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL))
 118                 status = nvmet_get_smart_log_all(req, log);
 119         else
 120                 status = nvmet_get_smart_log_nsid(req, log);
 121         if (status)
 122                 goto out;
 123
 124         status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
 125 out:
 126         nvmet_req_complete(req, status);
 127 }
 128
 129 static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req)
 130 {
 131         struct nvmet_ctrl *ctrl = req->sq->ctrl;
 132         u16 status = NVME_SC_INTERNAL;
 133         size_t len;
 134
 135         if (req->data_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32))
 136                 goto out;
 137
 138         mutex_lock(&ctrl->lock);
 139         if (ctrl->nr_changed_ns == U32_MAX)
 140                 len = sizeof(__le32);
 141         else
 142                 len = ctrl->nr_changed_ns * sizeof(__le32);
 143         status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len);
 144         if (!status)
 145                 status = nvmet_zero_sgl(req, len, req->data_len - len);
 146         ctrl->nr_changed_ns = 0;
 147         mutex_unlock(&ctrl->lock);
 148 out:
 149         nvmet_req_complete(req, status);
 150 }
 151
 152 static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 153 {
 154         struct nvmet_ctrl *ctrl = req->sq->ctrl;
 155         struct nvme_id_ctrl *id;
 156         u16 status = 0;
 157         const char model[] = "Linux";
 158
 159         id = kzalloc(sizeof(*id), GFP_KERNEL);
 160         if (!id) {
 161                 status = NVME_SC_INTERNAL;
 162                 goto out;
 163         }
 164
 165         /* XXX: figure out how to assign real vendors IDs. */
 166         id->vid = 0;
 167         id->ssvid = 0;
 168
 169         memset(id->sn, ' ', sizeof(id->sn));
 170         bin2hex(id->sn, &ctrl->subsys->serial,
 171                 min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
 172         memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' ');
 173         memcpy_and_pad(id->fr, sizeof(id->fr),
 174                        UTS_RELEASE, strlen(UTS_RELEASE), ' ');
 175
 176         id->rab = 6;
 177
 178         /*
 179          * XXX: figure out how we can assign a IEEE OUI, but until then
 180          * the safest is to leave it as zeroes.
 181          */
 182
 183         /* we support multiple ports and multiples hosts: */
 184         id->cmic = (1 << 0) | (1 << 1);
 185
 186         /* no limit on data transfer sizes for now */
 187         id->mdts = 0;
 188         id->cntlid = cpu_to_le16(ctrl->cntlid);
 189         id->ver = cpu_to_le32(ctrl->subsys->ver);
 190
 191         /* XXX: figure out what to do about RTD3R/RTD3 */
 192         id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL);
 193         id->ctratt = cpu_to_le32(1 << 0);
 194
 195         id->oacs = 0;
 196
 197         /*
 198          * We don't really have a practical limit on the number of abort
 199          * comands.  But we don't do anything useful for abort either, so
 200          * no point in allowing more abort commands than the spec requires.
 201          */
 202         id->acl = 3;
 203
 204         id->aerl = NVMET_ASYNC_EVENTS - 1;
 205
 206         /* first slot is read-only, only one slot supported */
 207         id->frmw = (1 << 0) | (1 << 1);
 208         id->lpa = (1 << 0) | (1 << 2);
 209         id->elpe = NVMET_ERROR_LOG_SLOTS - 1;
 210         id->npss = 0;
 211
 212         /* We support keep-alive timeout in granularity of seconds */
 213         id->kas = cpu_to_le16(NVMET_KAS);
 214
 215         id->sqes = (0x6 << 4) | 0x6;
 216         id->cqes = (0x4 << 4) | 0x4;
 217
 218         /* no enforcement soft-limit for maxcmd - pick arbitrary high value */
 219         id->maxcmd = cpu_to_le16(NVMET_MAX_CMD);
 220
 221         id->nn = cpu_to_le32(ctrl->subsys->max_nsid);
 222         id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM |
 223                         NVME_CTRL_ONCS_WRITE_ZEROES);
 224
 225         /* XXX: don't report vwc if the underlying device is write through */
 226         id->vwc = NVME_CTRL_VWC_PRESENT;
 227
 228         /*
 229          * We can't support atomic writes bigger than a LBA without support
 230          * from the backend device.
 231          */
 232         id->awun = 0;
 233         id->awupf = 0;
 234
 235         id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */
 236         if (ctrl->ops->has_keyed_sgls)
 237                 id->sgls |= cpu_to_le32(1 << 2);
 238         if (ctrl->ops->sqe_inline_size)
 239                 id->sgls |= cpu_to_le32(1 << 20);
 240
 241         strcpy(id->subnqn, ctrl->subsys->subsysnqn);
 242
 243         /* Max command capsule size is sqe + single page of in-capsule data */
 244         id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) +
 245                                   ctrl->ops->sqe_inline_size) / 16);
 246         /* Max response capsule size is cqe */
 247         id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16);
 248
 249         id->msdbd = ctrl->ops->msdbd;
 250
 251         /*
 252          * Meh, we don't really support any power state.  Fake up the same
 253          * values that qemu does.
 254          */
 255         id->psd[0].max_power = cpu_to_le16(0x9c4);
 256         id->psd[0].entry_lat = cpu_to_le32(0x10);
 257         id->psd[0].exit_lat = cpu_to_le32(0x4);
 258
 259         status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
 260
 261         kfree(id);
 262 out:
 263         nvmet_req_complete(req, status);
 264 }
 265
 266 static void nvmet_execute_identify_ns(struct nvmet_req *req)
 267 {
 268         struct nvmet_ns *ns;
 269         struct nvme_id_ns *id;
 270         u16 status = 0;
 271
 272         ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
 273         if (!ns) {
 274                 status = NVME_SC_INVALID_NS | NVME_SC_DNR;
 275                 goto out;
 276         }
 277
 278         id = kzalloc(sizeof(*id), GFP_KERNEL);
 279         if (!id) {
 280                 status = NVME_SC_INTERNAL;
 281                 goto out_put_ns;
 282         }
 283
 284         /*
 285          * nuse = ncap = nsze isn't always true, but we have no way to find
 286          * that out from the underlying device.
 287          */
 288         id->ncap = id->nuse = id->nsze =
 289                 cpu_to_le64(ns->size >> ns->blksize_shift);
 290
 291         /*
 292          * We just provide a single LBA format that matches what the
 293          * underlying device reports.
 294          */
 295         id->nlbaf = 0;
 296         id->flbas = 0;
 297
 298         /*
 299          * Our namespace might always be shared.  Not just with other
 300          * controllers, but also with any other user of the block device.
 301          */
 302         id->nmic = (1 << 0);
 303
 304         memcpy(&id->nguid, &ns->nguid, sizeof(uuid_le));
 305
 306         id->lbaf[0].ds = ns->blksize_shift;
 307
 308         status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
 309
 310         kfree(id);
 311 out_put_ns:
 312         nvmet_put_namespace(ns);
 313 out:
 314         nvmet_req_complete(req, status);
 315 }
 316
 317 static void nvmet_execute_identify_nslist(struct nvmet_req *req)
 318 {
 319         static const int buf_size = NVME_IDENTIFY_DATA_SIZE;
 320         struct nvmet_ctrl *ctrl = req->sq->ctrl;
 321         struct nvmet_ns *ns;
 322         u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid);
 323         __le32 *list;
 324         u16 status = 0;
 325         int i = 0;
 326
 327         list = kzalloc(buf_size, GFP_KERNEL);
 328         if (!list) {
 329                 status = NVME_SC_INTERNAL;
 330                 goto out;
 331         }
 332
 333         rcu_read_lock();
 334         list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) {
 335                 if (ns->nsid <= min_nsid)
 336                         continue;
 337                 list[i++] = cpu_to_le32(ns->nsid);
 338                 if (i == buf_size / sizeof(__le32))
 339                         break;
 340         }
 341         rcu_read_unlock();
 342
 343         status = nvmet_copy_to_sgl(req, 0, list, buf_size);
 344
 345         kfree(list);
 346 out:
 347         nvmet_req_complete(req, status);
 348 }
 349
 350 static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len,
 351                                     void *id, off_t *off)
 352 {
 353         struct nvme_ns_id_desc desc = {
 354                 .nidt = type,
 355                 .nidl = len,
 356         };
 357         u16 status;
 358
 359         status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc));
 360         if (status)
 361                 return status;
 362         *off += sizeof(desc);
 363
 364         status = nvmet_copy_to_sgl(req, *off, id, len);
 365         if (status)
 366                 return status;
 367         *off += len;
 368
 369         return 0;
 370 }
 371
 372 static void nvmet_execute_identify_desclist(struct nvmet_req *req)
 373 {
 374         struct nvmet_ns *ns;
 375         u16 status = 0;
 376         off_t off = 0;
 377
 378         ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
 379         if (!ns) {
 380                 status = NVME_SC_INVALID_NS | NVME_SC_DNR;
 381                 goto out;
 382         }
 383
 384         if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) {
 385                 status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID,
 386                                                   NVME_NIDT_UUID_LEN,
 387                                                   &ns->uuid, &off);
 388                 if (status)
 389                         goto out_put_ns;
 390         }
 391         if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) {
 392                 status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID,
 393                                                   NVME_NIDT_NGUID_LEN,
 394                                                   &ns->nguid, &off);
 395                 if (status)
 396                         goto out_put_ns;
 397         }
 398
 399         if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off,
 400                         off) != NVME_IDENTIFY_DATA_SIZE - off)
 401                 status = NVME_SC_INTERNAL | NVME_SC_DNR;
 402 out_put_ns:
 403         nvmet_put_namespace(ns);
 404 out:
 405         nvmet_req_complete(req, status);
 406 }
 407
 408 /*
 409  * A "minimum viable" abort implementation: the command is mandatory in the
 410  * spec, but we are not required to do any useful work.  We couldn't really
 411  * do a useful abort, so don't bother even with waiting for the command
 412  * to be exectuted and return immediately telling the command to abort
 413  * wasn't found.
 414  */
 415 static void nvmet_execute_abort(struct nvmet_req *req)
 416 {
 417         nvmet_set_result(req, 1);
 418         nvmet_req_complete(req, 0);
 419 }
 420
 421 static void nvmet_execute_set_features(struct nvmet_req *req)
 422 {
 423         struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
 424         u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
 425         u32 val32;
 426         u16 status = 0;
 427
 428         switch (cdw10 & 0xff) {
 429         case NVME_FEAT_NUM_QUEUES:
 430                 nvmet_set_result(req,
 431                         (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16));
 432                 break;
 433         case NVME_FEAT_KATO:
 434                 val32 = le32_to_cpu(req->cmd->common.cdw10[1]);
 435                 req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000);
 436                 nvmet_set_result(req, req->sq->ctrl->kato);
 437                 break;
 438         case NVME_FEAT_ASYNC_EVENT:
 439                 val32 = le32_to_cpu(req->cmd->common.cdw10[1]);
 440                 if (val32 & ~NVMET_AEN_CFG_ALL) {
 441                         status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 442                         break;
 443                 }
 444
 445                 WRITE_ONCE(req->sq->ctrl->aen_enabled, val32);
 446                 nvmet_set_result(req, val32);
 447                 break;
 448         case NVME_FEAT_HOST_ID:
 449                 status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
 450                 break;
 451         default:
 452                 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 453                 break;
 454         }
 455
 456         nvmet_req_complete(req, status);
 457 }
 458
 459 static void nvmet_execute_get_features(struct nvmet_req *req)
 460 {
 461         struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
 462         u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10[0]);
 463         u16 status = 0;
 464
 465         switch (cdw10 & 0xff) {
 466         /*
 467          * These features are mandatory in the spec, but we don't
 468          * have a useful way to implement them.  We'll eventually
 469          * need to come up with some fake values for these.
 470          */
 471 #if 0
 472         case NVME_FEAT_ARBITRATION:
 473                 break;
 474         case NVME_FEAT_POWER_MGMT:
 475                 break;
 476         case NVME_FEAT_TEMP_THRESH:
 477                 break;
 478         case NVME_FEAT_ERR_RECOVERY:
 479                 break;
 480         case NVME_FEAT_IRQ_COALESCE:
 481                 break;
 482         case NVME_FEAT_IRQ_CONFIG:
 483                 break;
 484         case NVME_FEAT_WRITE_ATOMIC:
 485                 break;
 486 #endif
 487         case NVME_FEAT_ASYNC_EVENT:
 488                 nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled));
 489                 break;
 490         case NVME_FEAT_VOLATILE_WC:
 491                 nvmet_set_result(req, 1);
 492                 break;
 493         case NVME_FEAT_NUM_QUEUES:
 494                 nvmet_set_result(req,
 495                         (subsys->max_qid-1) | ((subsys->max_qid-1) << 16));
 496                 break;
 497         case NVME_FEAT_KATO:
 498                 nvmet_set_result(req, req->sq->ctrl->kato * 1000);
 499                 break;
 500         case NVME_FEAT_HOST_ID:
 501                 /* need 128-bit host identifier flag */
 502                 if (!(req->cmd->common.cdw10[1] & cpu_to_le32(1 << 0))) {
 503                         status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 504                         break;
 505                 }
 506
 507                 status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid,
 508                                 sizeof(req->sq->ctrl->hostid));
 509                 break;
 510         default:
 511                 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 512                 break;
 513         }
 514
 515         nvmet_req_complete(req, status);
 516 }
 517
 518 static void nvmet_execute_async_event(struct nvmet_req *req)
 519 {
 520         struct nvmet_ctrl *ctrl = req->sq->ctrl;
 521
 522         mutex_lock(&ctrl->lock);
 523         if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) {
 524                 mutex_unlock(&ctrl->lock);
 525                 nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR);
 526                 return;
 527         }
 528         ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req;
 529         mutex_unlock(&ctrl->lock);
 530
 531         schedule_work(&ctrl->async_event_work);
 532 }
 533
 534 static void nvmet_execute_keep_alive(struct nvmet_req *req)
 535 {
 536         struct nvmet_ctrl *ctrl = req->sq->ctrl;
 537
 538         pr_debug("ctrl %d update keep-alive timer for %d secs\n",
 539                 ctrl->cntlid, ctrl->kato);
 540
 541         mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ);
 542         nvmet_req_complete(req, 0);
 543 }
 544
 545 u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
 546 {
 547         struct nvme_command *cmd = req->cmd;
 548         u16 ret;
 549
 550         ret = nvmet_check_ctrl_status(req, cmd);
 551         if (unlikely(ret))
 552                 return ret;
 553
 554         switch (cmd->common.opcode) {
 555         case nvme_admin_get_log_page:
 556                 req->data_len = nvmet_get_log_page_len(cmd);
 557
 558                 switch (cmd->get_log_page.lid) {
 559                 case NVME_LOG_ERROR:
 560                         /*
 561                          * We currently never set the More bit in the status
 562                          * field, so all error log entries are invalid and can
 563                          * be zeroed out.  This is called a minum viable
 564                          * implementation (TM) of this mandatory log page.
 565                          */
 566                         req->execute = nvmet_execute_get_log_page_noop;
 567                         return 0;
 568                 case NVME_LOG_SMART:
 569                         req->execute = nvmet_execute_get_log_page_smart;
 570                         return 0;
 571                 case NVME_LOG_FW_SLOT:
 572                         /*
 573                          * We only support a single firmware slot which always
 574                          * is active, so we can zero out the whole firmware slot
 575                          * log and still claim to fully implement this mandatory
 576                          * log page.
 577                          */
 578                         req->execute = nvmet_execute_get_log_page_noop;
 579                         return 0;
 580                 case NVME_LOG_CHANGED_NS:
 581                         req->execute = nvmet_execute_get_log_changed_ns;
 582                         return 0;
 583                 }
 584                 break;
 585         case nvme_admin_identify:
 586                 req->data_len = NVME_IDENTIFY_DATA_SIZE;
 587                 switch (cmd->identify.cns) {
 588                 case NVME_ID_CNS_NS:
 589                         req->execute = nvmet_execute_identify_ns;
 590                         return 0;
 591                 case NVME_ID_CNS_CTRL:
 592                         req->execute = nvmet_execute_identify_ctrl;
 593                         return 0;
 594                 case NVME_ID_CNS_NS_ACTIVE_LIST:
 595                         req->execute = nvmet_execute_identify_nslist;
 596                         return 0;
 597                 case NVME_ID_CNS_NS_DESC_LIST:
 598                         req->execute = nvmet_execute_identify_desclist;
 599                         return 0;
 600                 }
 601                 break;
 602         case nvme_admin_abort_cmd:
 603                 req->execute = nvmet_execute_abort;
 604                 req->data_len = 0;
 605                 return 0;
 606         case nvme_admin_set_features:
 607                 req->execute = nvmet_execute_set_features;
 608                 req->data_len = 0;
 609                 return 0;
 610         case nvme_admin_get_features:
 611                 req->execute = nvmet_execute_get_features;
 612                 req->data_len = 0;
 613                 return 0;
 614         case nvme_admin_async_event:
 615                 req->execute = nvmet_execute_async_event;
 616                 req->data_len = 0;
 617                 return 0;
 618         case nvme_admin_keep_alive:
 619                 req->execute = nvmet_execute_keep_alive;
 620                 req->data_len = 0;
 621                 return 0;
 622         }
 623
 624         pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
 625                req->sq->qid);
 626         return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
 627 }