Commit | Line | Data |
---|---|---|
3dcf60bc | 1 | // SPDX-License-Identifier: GPL-2.0 |
6a0cb1bc HR |
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> | |
bf505456 | 16 | #include <linux/blk-mq.h> |
26202928 DLM |
17 | #include <linux/mm.h> |
18 | #include <linux/vmalloc.h> | |
bd976e52 | 19 | #include <linux/sched/mm.h> |
6a0cb1bc | 20 | |
a2d6b3a2 DLM |
21 | #include "blk.h" |
22 | ||
02694e86 CK |
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 | ||
6a0cb1bc HR |
55 | static inline sector_t blk_zone_start(struct request_queue *q, |
56 | sector_t sector) | |
57 | { | |
f99e8648 | 58 | sector_t zone_mask = blk_queue_zone_sectors(q) - 1; |
6a0cb1bc HR |
59 | |
60 | return sector & ~zone_mask; | |
61 | } | |
62 | ||
6cc77e9c CH |
63 | /* |
64 | * Return true if a request is a write requests that needs zone write locking. | |
65 | */ | |
66 | bool blk_req_needs_zone_write_lock(struct request *rq) | |
67 | { | |
68 | if (!rq->q->seq_zones_wlock) | |
69 | return false; | |
70 | ||
71 | if (blk_rq_is_passthrough(rq)) | |
72 | return false; | |
73 | ||
74 | switch (req_op(rq)) { | |
75 | case REQ_OP_WRITE_ZEROES: | |
76 | case REQ_OP_WRITE_SAME: | |
77 | case REQ_OP_WRITE: | |
78 | return blk_rq_zone_is_seq(rq); | |
79 | default: | |
80 | return false; | |
81 | } | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock); | |
84 | ||
85 | void __blk_req_zone_write_lock(struct request *rq) | |
86 | { | |
87 | if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq), | |
88 | rq->q->seq_zones_wlock))) | |
89 | return; | |
90 | ||
91 | WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); | |
92 | rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; | |
93 | } | |
94 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_lock); | |
95 | ||
96 | void __blk_req_zone_write_unlock(struct request *rq) | |
97 | { | |
98 | rq->rq_flags &= ~RQF_ZONE_WRITE_LOCKED; | |
99 | if (rq->q->seq_zones_wlock) | |
100 | WARN_ON_ONCE(!test_and_clear_bit(blk_rq_zone_no(rq), | |
101 | rq->q->seq_zones_wlock)); | |
102 | } | |
103 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); | |
104 | ||
a91e1380 DLM |
105 | /** |
106 | * blkdev_nr_zones - Get number of zones | |
9b38bb4b | 107 | * @disk: Target gendisk |
a91e1380 | 108 | * |
9b38bb4b CH |
109 | * Return the total number of zones of a zoned block device. For a block |
110 | * device without zone capabilities, the number of zones is always 0. | |
a91e1380 | 111 | */ |
9b38bb4b | 112 | unsigned int blkdev_nr_zones(struct gendisk *disk) |
a91e1380 | 113 | { |
9b38bb4b | 114 | sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); |
a91e1380 | 115 | |
9b38bb4b | 116 | if (!blk_queue_is_zoned(disk->queue)) |
a91e1380 | 117 | return 0; |
9b38bb4b | 118 | return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); |
a91e1380 DLM |
119 | } |
120 | EXPORT_SYMBOL_GPL(blkdev_nr_zones); | |
121 | ||
6a0cb1bc HR |
122 | /** |
123 | * blkdev_report_zones - Get zones information | |
124 | * @bdev: Target block device | |
125 | * @sector: Sector from which to report zones | |
d4100351 CH |
126 | * @nr_zones: Maximum number of zones to report |
127 | * @cb: Callback function called for each reported zone | |
128 | * @data: Private data for the callback | |
6a0cb1bc HR |
129 | * |
130 | * Description: | |
d4100351 CH |
131 | * Get zone information starting from the zone containing @sector for at most |
132 | * @nr_zones, and call @cb for each zone reported by the device. | |
133 | * To report all zones in a device starting from @sector, the BLK_ALL_ZONES | |
134 | * constant can be passed to @nr_zones. | |
135 | * Returns the number of zones reported by the device, or a negative errno | |
136 | * value in case of failure. | |
137 | * | |
138 | * Note: The caller must use memalloc_noXX_save/restore() calls to control | |
139 | * memory allocations done within this function. | |
6a0cb1bc | 140 | */ |
e76239a3 | 141 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, |
d4100351 | 142 | unsigned int nr_zones, report_zones_cb cb, void *data) |
6a0cb1bc | 143 | { |
ceeb373a | 144 | struct gendisk *disk = bdev->bd_disk; |
5eac3eb3 | 145 | sector_t capacity = get_capacity(disk); |
6a0cb1bc | 146 | |
d4100351 CH |
147 | if (!blk_queue_is_zoned(bdev_get_queue(bdev)) || |
148 | WARN_ON_ONCE(!disk->fops->report_zones)) | |
e76239a3 | 149 | return -EOPNOTSUPP; |
6a0cb1bc | 150 | |
d4100351 | 151 | if (!nr_zones || sector >= capacity) |
6a0cb1bc | 152 | return 0; |
6a0cb1bc | 153 | |
d4100351 | 154 | return disk->fops->report_zones(disk, sector, nr_zones, cb, data); |
6a0cb1bc HR |
155 | } |
156 | EXPORT_SYMBOL_GPL(blkdev_report_zones); | |
157 | ||
6e33dbf2 | 158 | static inline bool blkdev_allow_reset_all_zones(struct block_device *bdev, |
c7a1d926 | 159 | sector_t sector, |
6e33dbf2 CK |
160 | sector_t nr_sectors) |
161 | { | |
162 | if (!blk_queue_zone_resetall(bdev_get_queue(bdev))) | |
163 | return false; | |
164 | ||
6e33dbf2 | 165 | /* |
5eac3eb3 DLM |
166 | * REQ_OP_ZONE_RESET_ALL can be executed only if the number of sectors |
167 | * of the applicable zone range is the entire disk. | |
6e33dbf2 | 168 | */ |
5eac3eb3 | 169 | return !sector && nr_sectors == get_capacity(bdev->bd_disk); |
6e33dbf2 CK |
170 | } |
171 | ||
6a0cb1bc | 172 | /** |
6c1b1da5 | 173 | * blkdev_zone_mgmt - Execute a zone management operation on a range of zones |
6a0cb1bc | 174 | * @bdev: Target block device |
6c1b1da5 AJ |
175 | * @op: Operation to be performed on the zones |
176 | * @sector: Start sector of the first zone to operate on | |
177 | * @nr_sectors: Number of sectors, should be at least the length of one zone and | |
178 | * must be zone size aligned. | |
6a0cb1bc HR |
179 | * @gfp_mask: Memory allocation flags (for bio_alloc) |
180 | * | |
181 | * Description: | |
6c1b1da5 | 182 | * Perform the specified operation on the range of zones specified by |
6a0cb1bc HR |
183 | * @sector..@sector+@nr_sectors. Specifying the entire disk sector range |
184 | * is valid, but the specified range should not contain conventional zones. | |
6c1b1da5 AJ |
185 | * The operation to execute on each zone can be a zone reset, open, close |
186 | * or finish request. | |
6a0cb1bc | 187 | */ |
6c1b1da5 AJ |
188 | int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, |
189 | sector_t sector, sector_t nr_sectors, | |
190 | gfp_t gfp_mask) | |
6a0cb1bc HR |
191 | { |
192 | struct request_queue *q = bdev_get_queue(bdev); | |
6c1b1da5 | 193 | sector_t zone_sectors = blk_queue_zone_sectors(q); |
5eac3eb3 | 194 | sector_t capacity = get_capacity(bdev->bd_disk); |
6a0cb1bc | 195 | sector_t end_sector = sector + nr_sectors; |
a2d6b3a2 | 196 | struct bio *bio = NULL; |
6a0cb1bc HR |
197 | int ret; |
198 | ||
6a0cb1bc HR |
199 | if (!blk_queue_is_zoned(q)) |
200 | return -EOPNOTSUPP; | |
201 | ||
a2d6b3a2 DLM |
202 | if (bdev_read_only(bdev)) |
203 | return -EPERM; | |
204 | ||
6c1b1da5 AJ |
205 | if (!op_is_zone_mgmt(op)) |
206 | return -EOPNOTSUPP; | |
207 | ||
11bde986 | 208 | if (end_sector <= sector || end_sector > capacity) |
6a0cb1bc HR |
209 | /* Out of range */ |
210 | return -EINVAL; | |
211 | ||
212 | /* Check alignment (handle eventual smaller last zone) */ | |
6a0cb1bc HR |
213 | if (sector & (zone_sectors - 1)) |
214 | return -EINVAL; | |
215 | ||
5eac3eb3 | 216 | if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity) |
6a0cb1bc HR |
217 | return -EINVAL; |
218 | ||
219 | while (sector < end_sector) { | |
a2d6b3a2 | 220 | bio = blk_next_bio(bio, 0, gfp_mask); |
74d46992 | 221 | bio_set_dev(bio, bdev); |
6a0cb1bc | 222 | |
c7a1d926 DLM |
223 | /* |
224 | * Special case for the zone reset operation that reset all | |
225 | * zones, this is useful for applications like mkfs. | |
226 | */ | |
6c1b1da5 AJ |
227 | if (op == REQ_OP_ZONE_RESET && |
228 | blkdev_allow_reset_all_zones(bdev, sector, nr_sectors)) { | |
c7a1d926 DLM |
229 | bio->bi_opf = REQ_OP_ZONE_RESET_ALL; |
230 | break; | |
231 | } | |
232 | ||
8e42d239 | 233 | bio->bi_opf = op | REQ_SYNC; |
c7a1d926 | 234 | bio->bi_iter.bi_sector = sector; |
6a0cb1bc HR |
235 | sector += zone_sectors; |
236 | ||
237 | /* This may take a while, so be nice to others */ | |
238 | cond_resched(); | |
6a0cb1bc HR |
239 | } |
240 | ||
a2d6b3a2 DLM |
241 | ret = submit_bio_wait(bio); |
242 | bio_put(bio); | |
243 | ||
a2d6b3a2 | 244 | return ret; |
6a0cb1bc | 245 | } |
6c1b1da5 | 246 | EXPORT_SYMBOL_GPL(blkdev_zone_mgmt); |
3ed05a98 | 247 | |
d4100351 CH |
248 | struct zone_report_args { |
249 | struct blk_zone __user *zones; | |
250 | }; | |
251 | ||
252 | static int blkdev_copy_zone_to_user(struct blk_zone *zone, unsigned int idx, | |
253 | void *data) | |
254 | { | |
255 | struct zone_report_args *args = data; | |
256 | ||
257 | if (copy_to_user(&args->zones[idx], zone, sizeof(struct blk_zone))) | |
258 | return -EFAULT; | |
259 | return 0; | |
260 | } | |
261 | ||
56c4bddb | 262 | /* |
3ed05a98 ST |
263 | * BLKREPORTZONE ioctl processing. |
264 | * Called from blkdev_ioctl. | |
265 | */ | |
266 | int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, | |
267 | unsigned int cmd, unsigned long arg) | |
268 | { | |
269 | void __user *argp = (void __user *)arg; | |
d4100351 | 270 | struct zone_report_args args; |
3ed05a98 ST |
271 | struct request_queue *q; |
272 | struct blk_zone_report rep; | |
3ed05a98 ST |
273 | int ret; |
274 | ||
275 | if (!argp) | |
276 | return -EINVAL; | |
277 | ||
278 | q = bdev_get_queue(bdev); | |
279 | if (!q) | |
280 | return -ENXIO; | |
281 | ||
282 | if (!blk_queue_is_zoned(q)) | |
283 | return -ENOTTY; | |
284 | ||
285 | if (!capable(CAP_SYS_ADMIN)) | |
286 | return -EACCES; | |
287 | ||
288 | if (copy_from_user(&rep, argp, sizeof(struct blk_zone_report))) | |
289 | return -EFAULT; | |
290 | ||
291 | if (!rep.nr_zones) | |
292 | return -EINVAL; | |
293 | ||
d4100351 CH |
294 | args.zones = argp + sizeof(struct blk_zone_report); |
295 | ret = blkdev_report_zones(bdev, rep.sector, rep.nr_zones, | |
296 | blkdev_copy_zone_to_user, &args); | |
297 | if (ret < 0) | |
298 | return ret; | |
3ed05a98 | 299 | |
d4100351 CH |
300 | rep.nr_zones = ret; |
301 | if (copy_to_user(argp, &rep, sizeof(struct blk_zone_report))) | |
302 | return -EFAULT; | |
303 | return 0; | |
3ed05a98 ST |
304 | } |
305 | ||
56c4bddb | 306 | /* |
e876df1f | 307 | * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing. |
3ed05a98 ST |
308 | * Called from blkdev_ioctl. |
309 | */ | |
e876df1f AJ |
310 | int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, |
311 | unsigned int cmd, unsigned long arg) | |
3ed05a98 ST |
312 | { |
313 | void __user *argp = (void __user *)arg; | |
314 | struct request_queue *q; | |
315 | struct blk_zone_range zrange; | |
e876df1f | 316 | enum req_opf op; |
3ed05a98 ST |
317 | |
318 | if (!argp) | |
319 | return -EINVAL; | |
320 | ||
321 | q = bdev_get_queue(bdev); | |
322 | if (!q) | |
323 | return -ENXIO; | |
324 | ||
325 | if (!blk_queue_is_zoned(q)) | |
326 | return -ENOTTY; | |
327 | ||
328 | if (!capable(CAP_SYS_ADMIN)) | |
329 | return -EACCES; | |
330 | ||
331 | if (!(mode & FMODE_WRITE)) | |
332 | return -EBADF; | |
333 | ||
334 | if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range))) | |
335 | return -EFAULT; | |
336 | ||
e876df1f AJ |
337 | switch (cmd) { |
338 | case BLKRESETZONE: | |
339 | op = REQ_OP_ZONE_RESET; | |
340 | break; | |
341 | case BLKOPENZONE: | |
342 | op = REQ_OP_ZONE_OPEN; | |
343 | break; | |
344 | case BLKCLOSEZONE: | |
345 | op = REQ_OP_ZONE_CLOSE; | |
346 | break; | |
347 | case BLKFINISHZONE: | |
348 | op = REQ_OP_ZONE_FINISH; | |
349 | break; | |
350 | default: | |
351 | return -ENOTTY; | |
352 | } | |
353 | ||
354 | return blkdev_zone_mgmt(bdev, op, zrange.sector, zrange.nr_sectors, | |
355 | GFP_KERNEL); | |
3ed05a98 | 356 | } |
bf505456 DLM |
357 | |
358 | static inline unsigned long *blk_alloc_zone_bitmap(int node, | |
359 | unsigned int nr_zones) | |
360 | { | |
361 | return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long), | |
362 | GFP_NOIO, node); | |
363 | } | |
364 | ||
bf505456 DLM |
365 | void blk_queue_free_zone_bitmaps(struct request_queue *q) |
366 | { | |
f216fdd7 CH |
367 | kfree(q->conv_zones_bitmap); |
368 | q->conv_zones_bitmap = NULL; | |
bf505456 DLM |
369 | kfree(q->seq_zones_wlock); |
370 | q->seq_zones_wlock = NULL; | |
371 | } | |
372 | ||
d4100351 CH |
373 | struct blk_revalidate_zone_args { |
374 | struct gendisk *disk; | |
f216fdd7 | 375 | unsigned long *conv_zones_bitmap; |
d4100351 | 376 | unsigned long *seq_zones_wlock; |
e94f5819 | 377 | unsigned int nr_zones; |
6c6b3549 | 378 | sector_t zone_sectors; |
d4100351 CH |
379 | sector_t sector; |
380 | }; | |
381 | ||
d9dd7308 DLM |
382 | /* |
383 | * Helper function to check the validity of zones of a zoned block device. | |
384 | */ | |
d4100351 CH |
385 | static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, |
386 | void *data) | |
d9dd7308 | 387 | { |
d4100351 CH |
388 | struct blk_revalidate_zone_args *args = data; |
389 | struct gendisk *disk = args->disk; | |
d9dd7308 | 390 | struct request_queue *q = disk->queue; |
d9dd7308 DLM |
391 | sector_t capacity = get_capacity(disk); |
392 | ||
393 | /* | |
394 | * All zones must have the same size, with the exception on an eventual | |
395 | * smaller last zone. | |
396 | */ | |
6c6b3549 CH |
397 | if (zone->start == 0) { |
398 | if (zone->len == 0 || !is_power_of_2(zone->len)) { | |
399 | pr_warn("%s: Invalid zoned device with non power of two zone size (%llu)\n", | |
400 | disk->disk_name, zone->len); | |
401 | return -ENODEV; | |
402 | } | |
d9dd7308 | 403 | |
6c6b3549 CH |
404 | args->zone_sectors = zone->len; |
405 | args->nr_zones = (capacity + zone->len - 1) >> ilog2(zone->len); | |
406 | } else if (zone->start + args->zone_sectors < capacity) { | |
407 | if (zone->len != args->zone_sectors) { | |
408 | pr_warn("%s: Invalid zoned device with non constant zone size\n", | |
409 | disk->disk_name); | |
410 | return -ENODEV; | |
411 | } | |
412 | } else { | |
413 | if (zone->len > args->zone_sectors) { | |
414 | pr_warn("%s: Invalid zoned device with larger last zone size\n", | |
415 | disk->disk_name); | |
416 | return -ENODEV; | |
417 | } | |
d9dd7308 DLM |
418 | } |
419 | ||
420 | /* Check for holes in the zone report */ | |
d4100351 | 421 | if (zone->start != args->sector) { |
d9dd7308 | 422 | pr_warn("%s: Zone gap at sectors %llu..%llu\n", |
d4100351 CH |
423 | disk->disk_name, args->sector, zone->start); |
424 | return -ENODEV; | |
d9dd7308 DLM |
425 | } |
426 | ||
427 | /* Check zone type */ | |
428 | switch (zone->type) { | |
429 | case BLK_ZONE_TYPE_CONVENTIONAL: | |
e94f5819 CH |
430 | if (!args->conv_zones_bitmap) { |
431 | args->conv_zones_bitmap = | |
432 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
433 | if (!args->conv_zones_bitmap) | |
434 | return -ENOMEM; | |
435 | } | |
436 | set_bit(idx, args->conv_zones_bitmap); | |
437 | break; | |
d9dd7308 DLM |
438 | case BLK_ZONE_TYPE_SEQWRITE_REQ: |
439 | case BLK_ZONE_TYPE_SEQWRITE_PREF: | |
e94f5819 CH |
440 | if (!args->seq_zones_wlock) { |
441 | args->seq_zones_wlock = | |
442 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
443 | if (!args->seq_zones_wlock) | |
444 | return -ENOMEM; | |
445 | } | |
d9dd7308 DLM |
446 | break; |
447 | default: | |
448 | pr_warn("%s: Invalid zone type 0x%x at sectors %llu\n", | |
449 | disk->disk_name, (int)zone->type, zone->start); | |
d4100351 | 450 | return -ENODEV; |
d9dd7308 DLM |
451 | } |
452 | ||
d4100351 CH |
453 | args->sector += zone->len; |
454 | return 0; | |
455 | } | |
456 | ||
bf505456 DLM |
457 | /** |
458 | * blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps | |
459 | * @disk: Target disk | |
460 | * | |
461 | * Helper function for low-level device drivers to (re) allocate and initialize | |
462 | * a disk request queue zone bitmaps. This functions should normally be called | |
ae58954d CH |
463 | * within the disk ->revalidate method for blk-mq based drivers. For BIO based |
464 | * drivers only q->nr_zones needs to be updated so that the sysfs exposed value | |
465 | * is correct. | |
bf505456 DLM |
466 | */ |
467 | int blk_revalidate_disk_zones(struct gendisk *disk) | |
468 | { | |
469 | struct request_queue *q = disk->queue; | |
e94f5819 CH |
470 | struct blk_revalidate_zone_args args = { |
471 | .disk = disk, | |
e94f5819 | 472 | }; |
6c6b3549 CH |
473 | unsigned int noio_flag; |
474 | int ret; | |
bf505456 | 475 | |
c98c3d09 CH |
476 | if (WARN_ON_ONCE(!blk_queue_is_zoned(q))) |
477 | return -EIO; | |
ae58954d CH |
478 | if (WARN_ON_ONCE(!queue_is_mq(q))) |
479 | return -EIO; | |
bf505456 | 480 | |
e94f5819 | 481 | /* |
6c6b3549 CH |
482 | * Ensure that all memory allocations in this context are done as if |
483 | * GFP_NOIO was specified. | |
e94f5819 | 484 | */ |
6c6b3549 CH |
485 | noio_flag = memalloc_noio_save(); |
486 | ret = disk->fops->report_zones(disk, 0, UINT_MAX, | |
487 | blk_revalidate_zone_cb, &args); | |
488 | memalloc_noio_restore(noio_flag); | |
bf505456 | 489 | |
bf505456 | 490 | /* |
6c6b3549 CH |
491 | * Install the new bitmaps and update nr_zones only once the queue is |
492 | * stopped and all I/Os are completed (i.e. a scheduler is not | |
493 | * referencing the bitmaps). | |
bf505456 DLM |
494 | */ |
495 | blk_mq_freeze_queue(q); | |
d4100351 | 496 | if (ret >= 0) { |
6c6b3549 | 497 | blk_queue_chunk_sectors(q, args.zone_sectors); |
e94f5819 | 498 | q->nr_zones = args.nr_zones; |
d4100351 | 499 | swap(q->seq_zones_wlock, args.seq_zones_wlock); |
f216fdd7 | 500 | swap(q->conv_zones_bitmap, args.conv_zones_bitmap); |
d4100351 CH |
501 | ret = 0; |
502 | } else { | |
bf505456 | 503 | pr_warn("%s: failed to revalidate zones\n", disk->disk_name); |
bf505456 | 504 | blk_queue_free_zone_bitmaps(q); |
bf505456 | 505 | } |
d4100351 | 506 | blk_mq_unfreeze_queue(q); |
bf505456 | 507 | |
d4100351 | 508 | kfree(args.seq_zones_wlock); |
f216fdd7 | 509 | kfree(args.conv_zones_bitmap); |
bf505456 DLM |
510 | return ret; |
511 | } | |
512 | EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); |