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