block/blk-zoned.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Zoned block device handling
   4  *
   5  * Copyright (c) 2015, Hannes Reinecke
   6  * Copyright (c) 2015, SUSE Linux GmbH
   7  *
   8  * Copyright (c) 2016, Damien Le Moal
   9  * Copyright (c) 2016, Western Digital
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/rbtree.h>
  15 #include <linux/blkdev.h>
  16 #include <linux/blk-mq.h>
  17 #include <linux/mm.h>
  18 #include <linux/vmalloc.h>
  19 #include <linux/sched/mm.h>
  20
  21 #include "blk.h"
  22
  23 #define ZONE_COND_NAME(name) [BLK_ZONE_COND_##name] = #name
  24 static const char *const zone_cond_name[] = {
  25         ZONE_COND_NAME(NOT_WP),
  26         ZONE_COND_NAME(EMPTY),
  27         ZONE_COND_NAME(IMP_OPEN),
  28         ZONE_COND_NAME(EXP_OPEN),
  29         ZONE_COND_NAME(CLOSED),
  30         ZONE_COND_NAME(READONLY),
  31         ZONE_COND_NAME(FULL),
  32         ZONE_COND_NAME(OFFLINE),
  33 };
  34 #undef ZONE_COND_NAME
  35
  36 /**
  37  * blk_zone_cond_str - Return string XXX in BLK_ZONE_COND_XXX.
  38  * @zone_cond: BLK_ZONE_COND_XXX.
  39  *
  40  * Description: Centralize block layer function to convert BLK_ZONE_COND_XXX
  41  * into string format. Useful in the debugging and tracing zone conditions. For
  42  * invalid BLK_ZONE_COND_XXX it returns string "UNKNOWN".
  43  */
  44 const char *blk_zone_cond_str(enum blk_zone_cond zone_cond)
  45 {
  46         static const char *zone_cond_str = "UNKNOWN";
  47
  48         if (zone_cond < ARRAY_SIZE(zone_cond_name) && zone_cond_name[zone_cond])
  49                 zone_cond_str = zone_cond_name[zone_cond];
  50
  51         return zone_cond_str;
  52 }
  53 EXPORT_SYMBOL_GPL(blk_zone_cond_str);
  54
  55 /*
  56  * Return true if a request is a write requests that needs zone write locking.
  57  */
  58 bool blk_req_needs_zone_write_lock(struct request *rq)
  59 {
  60         if (blk_rq_is_passthrough(rq))
  61                 return false;
  62
  63         if (!rq->q->disk->seq_zones_wlock)
  64                 return false;
  65
  66         switch (req_op(rq)) {
  67         case REQ_OP_WRITE_ZEROES:
  68         case REQ_OP_WRITE:
  69                 return blk_rq_zone_is_seq(rq);
  70         default:
  71                 return false;
  72         }
  73 }
  74 EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock);
  75
  76 bool blk_req_zone_write_trylock(struct request *rq)
  77 {
  78         unsigned int zno = blk_rq_zone_no(rq);
  79
  80         if (test_and_set_bit(zno, rq->q->disk->seq_zones_wlock))
  81                 return false;
  82
  83         WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED);
  84         rq->rq_flags |= RQF_ZONE_WRITE_LOCKED;
  85
  86         return true;
  87 }
  88 EXPORT_SYMBOL_GPL(blk_req_zone_write_trylock);
  89
  90 void __blk_req_zone_write_lock(struct request *rq)
  91 {
  92         if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq),
  93                                           rq->q->disk->seq_zones_wlock)))
  94                 return;
  95
  96         WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED);
  97         rq->rq_flags |= RQF_ZONE_WRITE_LOCKED;
  98 }
  99 EXPORT_SYMBOL_GPL(__blk_req_zone_write_lock);
 100
 101 void __blk_req_zone_write_unlock(struct request *rq)
 102 {
 103         rq->rq_flags &= ~RQF_ZONE_WRITE_LOCKED;
 104         if (rq->q->disk->seq_zones_wlock)
 105                 WARN_ON_ONCE(!test_and_clear_bit(blk_rq_zone_no(rq),
 106                                                  rq->q->disk->seq_zones_wlock));
 107 }
 108 EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock);
 109
 110 /**
 111  * bdev_nr_zones - Get number of zones
 112  * @bdev:       Target device
 113  *
 114  * Return the total number of zones of a zoned block device.  For a block
 115  * device without zone capabilities, the number of zones is always 0.
 116  */
 117 unsigned int bdev_nr_zones(struct block_device *bdev)
 118 {
 119         sector_t zone_sectors = bdev_zone_sectors(bdev);
 120
 121         if (!bdev_is_zoned(bdev))
 122                 return 0;
 123         return (bdev_nr_sectors(bdev) + zone_sectors - 1) >>
 124                 ilog2(zone_sectors);
 125 }
 126 EXPORT_SYMBOL_GPL(bdev_nr_zones);
 127
 128 /**
 129  * blkdev_report_zones - Get zones information
 130  * @bdev:       Target block device
 131  * @sector:     Sector from which to report zones
 132  * @nr_zones:   Maximum number of zones to report
 133  * @cb:         Callback function called for each reported zone
 134  * @data:       Private data for the callback
 135  *
 136  * Description:
 137  *    Get zone information starting from the zone containing @sector for at most
 138  *    @nr_zones, and call @cb for each zone reported by the device.
 139  *    To report all zones in a device starting from @sector, the BLK_ALL_ZONES
 140  *    constant can be passed to @nr_zones.
 141  *    Returns the number of zones reported by the device, or a negative errno
 142  *    value in case of failure.
 143  *
 144  *    Note: The caller must use memalloc_noXX_save/restore() calls to control
 145  *    memory allocations done within this function.
 146  */
 147 int blkdev_report_zones(struct block_device *bdev, sector_t sector,
 148                         unsigned int nr_zones, report_zones_cb cb, void *data)
 149 {
 150         struct gendisk *disk = bdev->bd_disk;
 151         sector_t capacity = get_capacity(disk);
 152
 153         if (!bdev_is_zoned(bdev) || WARN_ON_ONCE(!disk->fops->report_zones))
 154                 return -EOPNOTSUPP;
 155
 156         if (!nr_zones || sector >= capacity)
 157                 return 0;
 158
 159         return disk->fops->report_zones(disk, sector, nr_zones, cb, data);
 160 }
 161 EXPORT_SYMBOL_GPL(blkdev_report_zones);
 162
 163 static inline unsigned long *blk_alloc_zone_bitmap(int node,
 164                                                    unsigned int nr_zones)
 165 {
 166         return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long),
 167                             GFP_NOIO, node);
 168 }
 169
 170 static int blk_zone_need_reset_cb(struct blk_zone *zone, unsigned int idx,
 171                                   void *data)
 172 {
 173         /*
 174          * For an all-zones reset, ignore conventional, empty, read-only
 175          * and offline zones.
 176          */
 177         switch (zone->cond) {
 178         case BLK_ZONE_COND_NOT_WP:
 179         case BLK_ZONE_COND_EMPTY:
 180         case BLK_ZONE_COND_READONLY:
 181         case BLK_ZONE_COND_OFFLINE:
 182                 return 0;
 183         default:
 184                 set_bit(idx, (unsigned long *)data);
 185                 return 0;
 186         }
 187 }
 188
 189 static int blkdev_zone_reset_all_emulated(struct block_device *bdev,
 190                                           gfp_t gfp_mask)
 191 {
 192         struct gendisk *disk = bdev->bd_disk;
 193         sector_t capacity = bdev_nr_sectors(bdev);
 194         sector_t zone_sectors = bdev_zone_sectors(bdev);
 195         unsigned long *need_reset;
 196         struct bio *bio = NULL;
 197         sector_t sector = 0;
 198         int ret;
 199
 200         need_reset = blk_alloc_zone_bitmap(disk->queue->node, disk->nr_zones);
 201         if (!need_reset)
 202                 return -ENOMEM;
 203
 204         ret = disk->fops->report_zones(disk, 0, disk->nr_zones,
 205                                        blk_zone_need_reset_cb, need_reset);
 206         if (ret < 0)
 207                 goto out_free_need_reset;
 208
 209         ret = 0;
 210         while (sector < capacity) {
 211                 if (!test_bit(disk_zone_no(disk, sector), need_reset)) {
 212                         sector += zone_sectors;
 213                         continue;
 214                 }
 215
 216                 bio = blk_next_bio(bio, bdev, 0, REQ_OP_ZONE_RESET | REQ_SYNC,
 217                                    gfp_mask);
 218                 bio->bi_iter.bi_sector = sector;
 219                 sector += zone_sectors;
 220
 221                 /* This may take a while, so be nice to others */
 222                 cond_resched();
 223         }
 224
 225         if (bio) {
 226                 ret = submit_bio_wait(bio);
 227                 bio_put(bio);
 228         }
 229
 230 out_free_need_reset:
 231         kfree(need_reset);
 232         return ret;
 233 }
 234
 235 static int blkdev_zone_reset_all(struct block_device *bdev, gfp_t gfp_mask)
 236 {
 237         struct bio bio;
 238
 239         bio_init(&bio, bdev, NULL, 0, REQ_OP_ZONE_RESET_ALL | REQ_SYNC);
 240         return submit_bio_wait(&bio);
 241 }
 242
 243 /**
 244  * blkdev_zone_mgmt - Execute a zone management operation on a range of zones
 245  * @bdev:       Target block device
 246  * @op:         Operation to be performed on the zones
 247  * @sector:     Start sector of the first zone to operate on
 248  * @nr_sectors: Number of sectors, should be at least the length of one zone and
 249  *              must be zone size aligned.
 250  * @gfp_mask:   Memory allocation flags (for bio_alloc)
 251  *
 252  * Description:
 253  *    Perform the specified operation on the range of zones specified by
 254  *    @sector..@sector+@nr_sectors. Specifying the entire disk sector range
 255  *    is valid, but the specified range should not contain conventional zones.
 256  *    The operation to execute on each zone can be a zone reset, open, close
 257  *    or finish request.
 258  */
 259 int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
 260                      sector_t sector, sector_t nr_sectors, gfp_t gfp_mask)
 261 {
 262         struct request_queue *q = bdev_get_queue(bdev);
 263         sector_t zone_sectors = bdev_zone_sectors(bdev);
 264         sector_t capacity = bdev_nr_sectors(bdev);
 265         sector_t end_sector = sector + nr_sectors;
 266         struct bio *bio = NULL;
 267         int ret = 0;
 268
 269         if (!bdev_is_zoned(bdev))
 270                 return -EOPNOTSUPP;
 271
 272         if (bdev_read_only(bdev))
 273                 return -EPERM;
 274
 275         if (!op_is_zone_mgmt(op))
 276                 return -EOPNOTSUPP;
 277
 278         if (end_sector <= sector || end_sector > capacity)
 279                 /* Out of range */
 280                 return -EINVAL;
 281
 282         /* Check alignment (handle eventual smaller last zone) */
 283         if (sector & (zone_sectors - 1))
 284                 return -EINVAL;
 285
 286         if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity)
 287                 return -EINVAL;
 288
 289         /*
 290          * In the case of a zone reset operation over all zones,
 291          * REQ_OP_ZONE_RESET_ALL can be used with devices supporting this
 292          * command. For other devices, we emulate this command behavior by
 293          * identifying the zones needing a reset.
 294          */
 295         if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity) {
 296                 if (!blk_queue_zone_resetall(q))
 297                         return blkdev_zone_reset_all_emulated(bdev, gfp_mask);
 298                 return blkdev_zone_reset_all(bdev, gfp_mask);
 299         }
 300
 301         while (sector < end_sector) {
 302                 bio = blk_next_bio(bio, bdev, 0, op | REQ_SYNC, gfp_mask);
 303                 bio->bi_iter.bi_sector = sector;
 304                 sector += zone_sectors;
 305
 306                 /* This may take a while, so be nice to others */
 307                 cond_resched();
 308         }
 309
 310         ret = submit_bio_wait(bio);
 311         bio_put(bio);
 312
 313         return ret;
 314 }
 315 EXPORT_SYMBOL_GPL(blkdev_zone_mgmt);
 316
 317 struct zone_report_args {
 318         struct blk_zone __user *zones;
 319 };
 320
 321 static int blkdev_copy_zone_to_user(struct blk_zone *zone, unsigned int idx,
 322                                     void *data)
 323 {
 324         struct zone_report_args *args = data;
 325
 326         if (copy_to_user(&args->zones[idx], zone, sizeof(struct blk_zone)))
 327                 return -EFAULT;
 328         return 0;
 329 }
 330
 331 /*
 332  * BLKREPORTZONE ioctl processing.
 333  * Called from blkdev_ioctl.
 334  */
 335 int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
 336                               unsigned int cmd, unsigned long arg)
 337 {
 338         void __user *argp = (void __user *)arg;
 339         struct zone_report_args args;
 340         struct request_queue *q;
 341         struct blk_zone_report rep;
 342         int ret;
 343
 344         if (!argp)
 345                 return -EINVAL;
 346
 347         q = bdev_get_queue(bdev);
 348         if (!q)
 349                 return -ENXIO;
 350
 351         if (!bdev_is_zoned(bdev))
 352                 return -ENOTTY;
 353
 354         if (copy_from_user(&rep, argp, sizeof(struct blk_zone_report)))
 355                 return -EFAULT;
 356
 357         if (!rep.nr_zones)
 358                 return -EINVAL;
 359
 360         args.zones = argp + sizeof(struct blk_zone_report);
 361         ret = blkdev_report_zones(bdev, rep.sector, rep.nr_zones,
 362                                   blkdev_copy_zone_to_user, &args);
 363         if (ret < 0)
 364                 return ret;
 365
 366         rep.nr_zones = ret;
 367         rep.flags = BLK_ZONE_REP_CAPACITY;
 368         if (copy_to_user(argp, &rep, sizeof(struct blk_zone_report)))
 369                 return -EFAULT;
 370         return 0;
 371 }
 372
 373 static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
 374                                       const struct blk_zone_range *zrange)
 375 {
 376         loff_t start, end;
 377
 378         if (zrange->sector + zrange->nr_sectors <= zrange->sector ||
 379             zrange->sector + zrange->nr_sectors > get_capacity(bdev->bd_disk))
 380                 /* Out of range */
 381                 return -EINVAL;
 382
 383         start = zrange->sector << SECTOR_SHIFT;
 384         end = ((zrange->sector + zrange->nr_sectors) << SECTOR_SHIFT) - 1;
 385
 386         return truncate_bdev_range(bdev, mode, start, end);
 387 }
 388
 389 /*
 390  * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing.
 391  * Called from blkdev_ioctl.
 392  */
 393 int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 394                            unsigned int cmd, unsigned long arg)
 395 {
 396         void __user *argp = (void __user *)arg;
 397         struct request_queue *q;
 398         struct blk_zone_range zrange;
 399         enum req_op op;
 400         int ret;
 401
 402         if (!argp)
 403                 return -EINVAL;
 404
 405         q = bdev_get_queue(bdev);
 406         if (!q)
 407                 return -ENXIO;
 408
 409         if (!bdev_is_zoned(bdev))
 410                 return -ENOTTY;
 411
 412         if (!(mode & FMODE_WRITE))
 413                 return -EBADF;
 414
 415         if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))
 416                 return -EFAULT;
 417
 418         switch (cmd) {
 419         case BLKRESETZONE:
 420                 op = REQ_OP_ZONE_RESET;
 421
 422                 /* Invalidate the page cache, including dirty pages. */
 423                 filemap_invalidate_lock(bdev->bd_inode->i_mapping);
 424                 ret = blkdev_truncate_zone_range(bdev, mode, &zrange);
 425                 if (ret)
 426                         goto fail;
 427                 break;
 428         case BLKOPENZONE:
 429                 op = REQ_OP_ZONE_OPEN;
 430                 break;
 431         case BLKCLOSEZONE:
 432                 op = REQ_OP_ZONE_CLOSE;
 433                 break;
 434         case BLKFINISHZONE:
 435                 op = REQ_OP_ZONE_FINISH;
 436                 break;
 437         default:
 438                 return -ENOTTY;
 439         }
 440
 441         ret = blkdev_zone_mgmt(bdev, op, zrange.sector, zrange.nr_sectors,
 442                                GFP_KERNEL);
 443
 444 fail:
 445         if (cmd == BLKRESETZONE)
 446                 filemap_invalidate_unlock(bdev->bd_inode->i_mapping);
 447
 448         return ret;
 449 }
 450
 451 void disk_free_zone_bitmaps(struct gendisk *disk)
 452 {
 453         kfree(disk->conv_zones_bitmap);
 454         disk->conv_zones_bitmap = NULL;
 455         kfree(disk->seq_zones_wlock);
 456         disk->seq_zones_wlock = NULL;
 457 }
 458
 459 struct blk_revalidate_zone_args {
 460         struct gendisk  *disk;
 461         unsigned long   *conv_zones_bitmap;
 462         unsigned long   *seq_zones_wlock;
 463         unsigned int    nr_zones;
 464         sector_t        zone_sectors;
 465         sector_t        sector;
 466 };
 467
 468 /*
 469  * Helper function to check the validity of zones of a zoned block device.
 470  */
 471 static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
 472                                   void *data)
 473 {
 474         struct blk_revalidate_zone_args *args = data;
 475         struct gendisk *disk = args->disk;
 476         struct request_queue *q = disk->queue;
 477         sector_t capacity = get_capacity(disk);
 478
 479         /*
 480          * All zones must have the same size, with the exception on an eventual
 481          * smaller last zone.
 482          */
 483         if (zone->start == 0) {
 484                 if (zone->len == 0 || !is_power_of_2(zone->len)) {
 485                         pr_warn("%s: Invalid zoned device with non power of two zone size (%llu)\n",
 486                                 disk->disk_name, zone->len);
 487                         return -ENODEV;
 488                 }
 489
 490                 args->zone_sectors = zone->len;
 491                 args->nr_zones = (capacity + zone->len - 1) >> ilog2(zone->len);
 492         } else if (zone->start + args->zone_sectors < capacity) {
 493                 if (zone->len != args->zone_sectors) {
 494                         pr_warn("%s: Invalid zoned device with non constant zone size\n",
 495                                 disk->disk_name);
 496                         return -ENODEV;
 497                 }
 498         } else {
 499                 if (zone->len > args->zone_sectors) {
 500                         pr_warn("%s: Invalid zoned device with larger last zone size\n",
 501                                 disk->disk_name);
 502                         return -ENODEV;
 503                 }
 504         }
 505
 506         /* Check for holes in the zone report */
 507         if (zone->start != args->sector) {
 508                 pr_warn("%s: Zone gap at sectors %llu..%llu\n",
 509                         disk->disk_name, args->sector, zone->start);
 510                 return -ENODEV;
 511         }
 512
 513         /* Check zone type */
 514         switch (zone->type) {
 515         case BLK_ZONE_TYPE_CONVENTIONAL:
 516                 if (!args->conv_zones_bitmap) {
 517                         args->conv_zones_bitmap =
 518                                 blk_alloc_zone_bitmap(q->node, args->nr_zones);
 519                         if (!args->conv_zones_bitmap)
 520                                 return -ENOMEM;
 521                 }
 522                 set_bit(idx, args->conv_zones_bitmap);
 523                 break;
 524         case BLK_ZONE_TYPE_SEQWRITE_REQ:
 525         case BLK_ZONE_TYPE_SEQWRITE_PREF:
 526                 if (!args->seq_zones_wlock) {
 527                         args->seq_zones_wlock =
 528                                 blk_alloc_zone_bitmap(q->node, args->nr_zones);
 529                         if (!args->seq_zones_wlock)
 530                                 return -ENOMEM;
 531                 }
 532                 break;
 533         default:
 534                 pr_warn("%s: Invalid zone type 0x%x at sectors %llu\n",
 535                         disk->disk_name, (int)zone->type, zone->start);
 536                 return -ENODEV;
 537         }
 538
 539         args->sector += zone->len;
 540         return 0;
 541 }
 542
 543 /**
 544  * blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps
 545  * @disk:       Target disk
 546  * @update_driver_data: Callback to update driver data on the frozen disk
 547  *
 548  * Helper function for low-level device drivers to (re) allocate and initialize
 549  * a disk request queue zone bitmaps. This functions should normally be called
 550  * within the disk ->revalidate method for blk-mq based drivers.  For BIO based
 551  * drivers only q->nr_zones needs to be updated so that the sysfs exposed value
 552  * is correct.
 553  * If the @update_driver_data callback function is not NULL, the callback is
 554  * executed with the device request queue frozen after all zones have been
 555  * checked.
 556  */
 557 int blk_revalidate_disk_zones(struct gendisk *disk,
 558                               void (*update_driver_data)(struct gendisk *disk))
 559 {
 560         struct request_queue *q = disk->queue;
 561         struct blk_revalidate_zone_args args = {
 562                 .disk           = disk,
 563         };
 564         unsigned int noio_flag;
 565         int ret;
 566
 567         if (WARN_ON_ONCE(!blk_queue_is_zoned(q)))
 568                 return -EIO;
 569         if (WARN_ON_ONCE(!queue_is_mq(q)))
 570                 return -EIO;
 571
 572         if (!get_capacity(disk))
 573                 return -EIO;
 574
 575         /*
 576          * Ensure that all memory allocations in this context are done as if
 577          * GFP_NOIO was specified.
 578          */
 579         noio_flag = memalloc_noio_save();
 580         ret = disk->fops->report_zones(disk, 0, UINT_MAX,
 581                                        blk_revalidate_zone_cb, &args);
 582         if (!ret) {
 583                 pr_warn("%s: No zones reported\n", disk->disk_name);
 584                 ret = -ENODEV;
 585         }
 586         memalloc_noio_restore(noio_flag);
 587
 588         /*
 589          * If zones where reported, make sure that the entire disk capacity
 590          * has been checked.
 591          */
 592         if (ret > 0 && args.sector != get_capacity(disk)) {
 593                 pr_warn("%s: Missing zones from sector %llu\n",
 594                         disk->disk_name, args.sector);
 595                 ret = -ENODEV;
 596         }
 597
 598         /*
 599          * Install the new bitmaps and update nr_zones only once the queue is
 600          * stopped and all I/Os are completed (i.e. a scheduler is not
 601          * referencing the bitmaps).
 602          */
 603         blk_mq_freeze_queue(q);
 604         if (ret > 0) {
 605                 blk_queue_chunk_sectors(q, args.zone_sectors);
 606                 disk->nr_zones = args.nr_zones;
 607                 swap(disk->seq_zones_wlock, args.seq_zones_wlock);
 608                 swap(disk->conv_zones_bitmap, args.conv_zones_bitmap);
 609                 if (update_driver_data)
 610                         update_driver_data(disk);
 611                 ret = 0;
 612         } else {
 613                 pr_warn("%s: failed to revalidate zones\n", disk->disk_name);
 614                 disk_free_zone_bitmaps(disk);
 615         }
 616         blk_mq_unfreeze_queue(q);
 617
 618         kfree(args.seq_zones_wlock);
 619         kfree(args.conv_zones_bitmap);
 620         return ret;
 621 }
 622 EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones);
 623
 624 void disk_clear_zone_settings(struct gendisk *disk)
 625 {
 626         struct request_queue *q = disk->queue;
 627
 628         blk_mq_freeze_queue(q);
 629
 630         disk_free_zone_bitmaps(disk);
 631         blk_queue_flag_clear(QUEUE_FLAG_ZONE_RESETALL, q);
 632         q->required_elevator_features &= ~ELEVATOR_F_ZBD_SEQ_WRITE;
 633         disk->nr_zones = 0;
 634         disk->max_open_zones = 0;
 635         disk->max_active_zones = 0;
 636         q->limits.chunk_sectors = 0;
 637         q->limits.zone_write_granularity = 0;
 638         q->limits.max_zone_append_sectors = 0;
 639
 640         blk_mq_unfreeze_queue(q);
 641 }