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