Commit | Line | Data |
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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 | ||
1392d370 JT |
85 | bool blk_req_zone_write_trylock(struct request *rq) |
86 | { | |
87 | unsigned int zno = blk_rq_zone_no(rq); | |
88 | ||
89 | if (test_and_set_bit(zno, rq->q->seq_zones_wlock)) | |
90 | return false; | |
91 | ||
92 | WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); | |
93 | rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; | |
94 | ||
95 | return true; | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(blk_req_zone_write_trylock); | |
98 | ||
6cc77e9c CH |
99 | void __blk_req_zone_write_lock(struct request *rq) |
100 | { | |
101 | if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq), | |
102 | rq->q->seq_zones_wlock))) | |
103 | return; | |
104 | ||
105 | WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); | |
106 | rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; | |
107 | } | |
108 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_lock); | |
109 | ||
110 | void __blk_req_zone_write_unlock(struct request *rq) | |
111 | { | |
112 | rq->rq_flags &= ~RQF_ZONE_WRITE_LOCKED; | |
113 | if (rq->q->seq_zones_wlock) | |
114 | WARN_ON_ONCE(!test_and_clear_bit(blk_rq_zone_no(rq), | |
115 | rq->q->seq_zones_wlock)); | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); | |
118 | ||
a91e1380 DLM |
119 | /** |
120 | * blkdev_nr_zones - Get number of zones | |
9b38bb4b | 121 | * @disk: Target gendisk |
a91e1380 | 122 | * |
9b38bb4b CH |
123 | * Return the total number of zones of a zoned block device. For a block |
124 | * device without zone capabilities, the number of zones is always 0. | |
a91e1380 | 125 | */ |
9b38bb4b | 126 | unsigned int blkdev_nr_zones(struct gendisk *disk) |
a91e1380 | 127 | { |
9b38bb4b | 128 | sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); |
a91e1380 | 129 | |
9b38bb4b | 130 | if (!blk_queue_is_zoned(disk->queue)) |
a91e1380 | 131 | return 0; |
9b38bb4b | 132 | return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); |
a91e1380 DLM |
133 | } |
134 | EXPORT_SYMBOL_GPL(blkdev_nr_zones); | |
135 | ||
6a0cb1bc HR |
136 | /** |
137 | * blkdev_report_zones - Get zones information | |
138 | * @bdev: Target block device | |
139 | * @sector: Sector from which to report zones | |
d4100351 CH |
140 | * @nr_zones: Maximum number of zones to report |
141 | * @cb: Callback function called for each reported zone | |
142 | * @data: Private data for the callback | |
6a0cb1bc HR |
143 | * |
144 | * Description: | |
d4100351 CH |
145 | * Get zone information starting from the zone containing @sector for at most |
146 | * @nr_zones, and call @cb for each zone reported by the device. | |
147 | * To report all zones in a device starting from @sector, the BLK_ALL_ZONES | |
148 | * constant can be passed to @nr_zones. | |
149 | * Returns the number of zones reported by the device, or a negative errno | |
150 | * value in case of failure. | |
151 | * | |
152 | * Note: The caller must use memalloc_noXX_save/restore() calls to control | |
153 | * memory allocations done within this function. | |
6a0cb1bc | 154 | */ |
e76239a3 | 155 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, |
d4100351 | 156 | unsigned int nr_zones, report_zones_cb cb, void *data) |
6a0cb1bc | 157 | { |
ceeb373a | 158 | struct gendisk *disk = bdev->bd_disk; |
5eac3eb3 | 159 | sector_t capacity = get_capacity(disk); |
6a0cb1bc | 160 | |
d4100351 CH |
161 | if (!blk_queue_is_zoned(bdev_get_queue(bdev)) || |
162 | WARN_ON_ONCE(!disk->fops->report_zones)) | |
e76239a3 | 163 | return -EOPNOTSUPP; |
6a0cb1bc | 164 | |
d4100351 | 165 | if (!nr_zones || sector >= capacity) |
6a0cb1bc | 166 | return 0; |
6a0cb1bc | 167 | |
d4100351 | 168 | return disk->fops->report_zones(disk, sector, nr_zones, cb, data); |
6a0cb1bc HR |
169 | } |
170 | EXPORT_SYMBOL_GPL(blkdev_report_zones); | |
171 | ||
6e33dbf2 | 172 | static inline bool blkdev_allow_reset_all_zones(struct block_device *bdev, |
c7a1d926 | 173 | sector_t sector, |
6e33dbf2 CK |
174 | sector_t nr_sectors) |
175 | { | |
176 | if (!blk_queue_zone_resetall(bdev_get_queue(bdev))) | |
177 | return false; | |
178 | ||
6e33dbf2 | 179 | /* |
5eac3eb3 DLM |
180 | * REQ_OP_ZONE_RESET_ALL can be executed only if the number of sectors |
181 | * of the applicable zone range is the entire disk. | |
6e33dbf2 | 182 | */ |
5eac3eb3 | 183 | return !sector && nr_sectors == get_capacity(bdev->bd_disk); |
6e33dbf2 CK |
184 | } |
185 | ||
6a0cb1bc | 186 | /** |
6c1b1da5 | 187 | * blkdev_zone_mgmt - Execute a zone management operation on a range of zones |
6a0cb1bc | 188 | * @bdev: Target block device |
6c1b1da5 AJ |
189 | * @op: Operation to be performed on the zones |
190 | * @sector: Start sector of the first zone to operate on | |
191 | * @nr_sectors: Number of sectors, should be at least the length of one zone and | |
192 | * must be zone size aligned. | |
6a0cb1bc HR |
193 | * @gfp_mask: Memory allocation flags (for bio_alloc) |
194 | * | |
195 | * Description: | |
6c1b1da5 | 196 | * Perform the specified operation on the range of zones specified by |
6a0cb1bc HR |
197 | * @sector..@sector+@nr_sectors. Specifying the entire disk sector range |
198 | * is valid, but the specified range should not contain conventional zones. | |
6c1b1da5 AJ |
199 | * The operation to execute on each zone can be a zone reset, open, close |
200 | * or finish request. | |
6a0cb1bc | 201 | */ |
6c1b1da5 AJ |
202 | int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, |
203 | sector_t sector, sector_t nr_sectors, | |
204 | gfp_t gfp_mask) | |
6a0cb1bc HR |
205 | { |
206 | struct request_queue *q = bdev_get_queue(bdev); | |
6c1b1da5 | 207 | sector_t zone_sectors = blk_queue_zone_sectors(q); |
5eac3eb3 | 208 | sector_t capacity = get_capacity(bdev->bd_disk); |
6a0cb1bc | 209 | sector_t end_sector = sector + nr_sectors; |
a2d6b3a2 | 210 | struct bio *bio = NULL; |
6a0cb1bc HR |
211 | int ret; |
212 | ||
6a0cb1bc HR |
213 | if (!blk_queue_is_zoned(q)) |
214 | return -EOPNOTSUPP; | |
215 | ||
a2d6b3a2 DLM |
216 | if (bdev_read_only(bdev)) |
217 | return -EPERM; | |
218 | ||
6c1b1da5 AJ |
219 | if (!op_is_zone_mgmt(op)) |
220 | return -EOPNOTSUPP; | |
221 | ||
11bde986 | 222 | if (end_sector <= sector || end_sector > capacity) |
6a0cb1bc HR |
223 | /* Out of range */ |
224 | return -EINVAL; | |
225 | ||
226 | /* Check alignment (handle eventual smaller last zone) */ | |
6a0cb1bc HR |
227 | if (sector & (zone_sectors - 1)) |
228 | return -EINVAL; | |
229 | ||
5eac3eb3 | 230 | if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity) |
6a0cb1bc HR |
231 | return -EINVAL; |
232 | ||
233 | while (sector < end_sector) { | |
a2d6b3a2 | 234 | bio = blk_next_bio(bio, 0, gfp_mask); |
74d46992 | 235 | bio_set_dev(bio, bdev); |
6a0cb1bc | 236 | |
c7a1d926 DLM |
237 | /* |
238 | * Special case for the zone reset operation that reset all | |
239 | * zones, this is useful for applications like mkfs. | |
240 | */ | |
6c1b1da5 AJ |
241 | if (op == REQ_OP_ZONE_RESET && |
242 | blkdev_allow_reset_all_zones(bdev, sector, nr_sectors)) { | |
c7a1d926 DLM |
243 | bio->bi_opf = REQ_OP_ZONE_RESET_ALL; |
244 | break; | |
245 | } | |
246 | ||
8e42d239 | 247 | bio->bi_opf = op | REQ_SYNC; |
c7a1d926 | 248 | bio->bi_iter.bi_sector = sector; |
6a0cb1bc HR |
249 | sector += zone_sectors; |
250 | ||
251 | /* This may take a while, so be nice to others */ | |
252 | cond_resched(); | |
6a0cb1bc HR |
253 | } |
254 | ||
a2d6b3a2 DLM |
255 | ret = submit_bio_wait(bio); |
256 | bio_put(bio); | |
257 | ||
a2d6b3a2 | 258 | return ret; |
6a0cb1bc | 259 | } |
6c1b1da5 | 260 | EXPORT_SYMBOL_GPL(blkdev_zone_mgmt); |
3ed05a98 | 261 | |
d4100351 CH |
262 | struct zone_report_args { |
263 | struct blk_zone __user *zones; | |
264 | }; | |
265 | ||
266 | static int blkdev_copy_zone_to_user(struct blk_zone *zone, unsigned int idx, | |
267 | void *data) | |
268 | { | |
269 | struct zone_report_args *args = data; | |
270 | ||
271 | if (copy_to_user(&args->zones[idx], zone, sizeof(struct blk_zone))) | |
272 | return -EFAULT; | |
273 | return 0; | |
274 | } | |
275 | ||
56c4bddb | 276 | /* |
3ed05a98 ST |
277 | * BLKREPORTZONE ioctl processing. |
278 | * Called from blkdev_ioctl. | |
279 | */ | |
280 | int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, | |
281 | unsigned int cmd, unsigned long arg) | |
282 | { | |
283 | void __user *argp = (void __user *)arg; | |
d4100351 | 284 | struct zone_report_args args; |
3ed05a98 ST |
285 | struct request_queue *q; |
286 | struct blk_zone_report rep; | |
3ed05a98 ST |
287 | int ret; |
288 | ||
289 | if (!argp) | |
290 | return -EINVAL; | |
291 | ||
292 | q = bdev_get_queue(bdev); | |
293 | if (!q) | |
294 | return -ENXIO; | |
295 | ||
296 | if (!blk_queue_is_zoned(q)) | |
297 | return -ENOTTY; | |
298 | ||
299 | if (!capable(CAP_SYS_ADMIN)) | |
300 | return -EACCES; | |
301 | ||
302 | if (copy_from_user(&rep, argp, sizeof(struct blk_zone_report))) | |
303 | return -EFAULT; | |
304 | ||
305 | if (!rep.nr_zones) | |
306 | return -EINVAL; | |
307 | ||
d4100351 CH |
308 | args.zones = argp + sizeof(struct blk_zone_report); |
309 | ret = blkdev_report_zones(bdev, rep.sector, rep.nr_zones, | |
310 | blkdev_copy_zone_to_user, &args); | |
311 | if (ret < 0) | |
312 | return ret; | |
3ed05a98 | 313 | |
d4100351 CH |
314 | rep.nr_zones = ret; |
315 | if (copy_to_user(argp, &rep, sizeof(struct blk_zone_report))) | |
316 | return -EFAULT; | |
317 | return 0; | |
3ed05a98 ST |
318 | } |
319 | ||
56c4bddb | 320 | /* |
e876df1f | 321 | * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing. |
3ed05a98 ST |
322 | * Called from blkdev_ioctl. |
323 | */ | |
e876df1f AJ |
324 | int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, |
325 | unsigned int cmd, unsigned long arg) | |
3ed05a98 ST |
326 | { |
327 | void __user *argp = (void __user *)arg; | |
328 | struct request_queue *q; | |
329 | struct blk_zone_range zrange; | |
e876df1f | 330 | enum req_opf op; |
3ed05a98 ST |
331 | |
332 | if (!argp) | |
333 | return -EINVAL; | |
334 | ||
335 | q = bdev_get_queue(bdev); | |
336 | if (!q) | |
337 | return -ENXIO; | |
338 | ||
339 | if (!blk_queue_is_zoned(q)) | |
340 | return -ENOTTY; | |
341 | ||
342 | if (!capable(CAP_SYS_ADMIN)) | |
343 | return -EACCES; | |
344 | ||
345 | if (!(mode & FMODE_WRITE)) | |
346 | return -EBADF; | |
347 | ||
348 | if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range))) | |
349 | return -EFAULT; | |
350 | ||
e876df1f AJ |
351 | switch (cmd) { |
352 | case BLKRESETZONE: | |
353 | op = REQ_OP_ZONE_RESET; | |
354 | break; | |
355 | case BLKOPENZONE: | |
356 | op = REQ_OP_ZONE_OPEN; | |
357 | break; | |
358 | case BLKCLOSEZONE: | |
359 | op = REQ_OP_ZONE_CLOSE; | |
360 | break; | |
361 | case BLKFINISHZONE: | |
362 | op = REQ_OP_ZONE_FINISH; | |
363 | break; | |
364 | default: | |
365 | return -ENOTTY; | |
366 | } | |
367 | ||
368 | return blkdev_zone_mgmt(bdev, op, zrange.sector, zrange.nr_sectors, | |
369 | GFP_KERNEL); | |
3ed05a98 | 370 | } |
bf505456 DLM |
371 | |
372 | static inline unsigned long *blk_alloc_zone_bitmap(int node, | |
373 | unsigned int nr_zones) | |
374 | { | |
375 | return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long), | |
376 | GFP_NOIO, node); | |
377 | } | |
378 | ||
bf505456 DLM |
379 | void blk_queue_free_zone_bitmaps(struct request_queue *q) |
380 | { | |
f216fdd7 CH |
381 | kfree(q->conv_zones_bitmap); |
382 | q->conv_zones_bitmap = NULL; | |
bf505456 DLM |
383 | kfree(q->seq_zones_wlock); |
384 | q->seq_zones_wlock = NULL; | |
385 | } | |
386 | ||
d4100351 CH |
387 | struct blk_revalidate_zone_args { |
388 | struct gendisk *disk; | |
f216fdd7 | 389 | unsigned long *conv_zones_bitmap; |
d4100351 | 390 | unsigned long *seq_zones_wlock; |
e94f5819 | 391 | unsigned int nr_zones; |
6c6b3549 | 392 | sector_t zone_sectors; |
d4100351 CH |
393 | sector_t sector; |
394 | }; | |
395 | ||
d9dd7308 DLM |
396 | /* |
397 | * Helper function to check the validity of zones of a zoned block device. | |
398 | */ | |
d4100351 CH |
399 | static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, |
400 | void *data) | |
d9dd7308 | 401 | { |
d4100351 CH |
402 | struct blk_revalidate_zone_args *args = data; |
403 | struct gendisk *disk = args->disk; | |
d9dd7308 | 404 | struct request_queue *q = disk->queue; |
d9dd7308 DLM |
405 | sector_t capacity = get_capacity(disk); |
406 | ||
407 | /* | |
408 | * All zones must have the same size, with the exception on an eventual | |
409 | * smaller last zone. | |
410 | */ | |
6c6b3549 CH |
411 | if (zone->start == 0) { |
412 | if (zone->len == 0 || !is_power_of_2(zone->len)) { | |
413 | pr_warn("%s: Invalid zoned device with non power of two zone size (%llu)\n", | |
414 | disk->disk_name, zone->len); | |
415 | return -ENODEV; | |
416 | } | |
d9dd7308 | 417 | |
6c6b3549 CH |
418 | args->zone_sectors = zone->len; |
419 | args->nr_zones = (capacity + zone->len - 1) >> ilog2(zone->len); | |
420 | } else if (zone->start + args->zone_sectors < capacity) { | |
421 | if (zone->len != args->zone_sectors) { | |
422 | pr_warn("%s: Invalid zoned device with non constant zone size\n", | |
423 | disk->disk_name); | |
424 | return -ENODEV; | |
425 | } | |
426 | } else { | |
427 | if (zone->len > args->zone_sectors) { | |
428 | pr_warn("%s: Invalid zoned device with larger last zone size\n", | |
429 | disk->disk_name); | |
430 | return -ENODEV; | |
431 | } | |
d9dd7308 DLM |
432 | } |
433 | ||
434 | /* Check for holes in the zone report */ | |
d4100351 | 435 | if (zone->start != args->sector) { |
d9dd7308 | 436 | pr_warn("%s: Zone gap at sectors %llu..%llu\n", |
d4100351 CH |
437 | disk->disk_name, args->sector, zone->start); |
438 | return -ENODEV; | |
d9dd7308 DLM |
439 | } |
440 | ||
441 | /* Check zone type */ | |
442 | switch (zone->type) { | |
443 | case BLK_ZONE_TYPE_CONVENTIONAL: | |
e94f5819 CH |
444 | if (!args->conv_zones_bitmap) { |
445 | args->conv_zones_bitmap = | |
446 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
447 | if (!args->conv_zones_bitmap) | |
448 | return -ENOMEM; | |
449 | } | |
450 | set_bit(idx, args->conv_zones_bitmap); | |
451 | break; | |
d9dd7308 DLM |
452 | case BLK_ZONE_TYPE_SEQWRITE_REQ: |
453 | case BLK_ZONE_TYPE_SEQWRITE_PREF: | |
e94f5819 CH |
454 | if (!args->seq_zones_wlock) { |
455 | args->seq_zones_wlock = | |
456 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
457 | if (!args->seq_zones_wlock) | |
458 | return -ENOMEM; | |
459 | } | |
d9dd7308 DLM |
460 | break; |
461 | default: | |
462 | pr_warn("%s: Invalid zone type 0x%x at sectors %llu\n", | |
463 | disk->disk_name, (int)zone->type, zone->start); | |
d4100351 | 464 | return -ENODEV; |
d9dd7308 DLM |
465 | } |
466 | ||
d4100351 CH |
467 | args->sector += zone->len; |
468 | return 0; | |
469 | } | |
470 | ||
bf505456 DLM |
471 | /** |
472 | * blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps | |
473 | * @disk: Target disk | |
e732671a | 474 | * @update_driver_data: Callback to update driver data on the frozen disk |
bf505456 DLM |
475 | * |
476 | * Helper function for low-level device drivers to (re) allocate and initialize | |
477 | * a disk request queue zone bitmaps. This functions should normally be called | |
ae58954d CH |
478 | * within the disk ->revalidate method for blk-mq based drivers. For BIO based |
479 | * drivers only q->nr_zones needs to be updated so that the sysfs exposed value | |
480 | * is correct. | |
e732671a DLM |
481 | * If the @update_driver_data callback function is not NULL, the callback is |
482 | * executed with the device request queue frozen after all zones have been | |
483 | * checked. | |
bf505456 | 484 | */ |
e732671a DLM |
485 | int blk_revalidate_disk_zones(struct gendisk *disk, |
486 | void (*update_driver_data)(struct gendisk *disk)) | |
bf505456 DLM |
487 | { |
488 | struct request_queue *q = disk->queue; | |
e94f5819 CH |
489 | struct blk_revalidate_zone_args args = { |
490 | .disk = disk, | |
e94f5819 | 491 | }; |
6c6b3549 CH |
492 | unsigned int noio_flag; |
493 | int ret; | |
bf505456 | 494 | |
c98c3d09 CH |
495 | if (WARN_ON_ONCE(!blk_queue_is_zoned(q))) |
496 | return -EIO; | |
ae58954d CH |
497 | if (WARN_ON_ONCE(!queue_is_mq(q))) |
498 | return -EIO; | |
bf505456 | 499 | |
e94f5819 | 500 | /* |
6c6b3549 CH |
501 | * Ensure that all memory allocations in this context are done as if |
502 | * GFP_NOIO was specified. | |
e94f5819 | 503 | */ |
6c6b3549 CH |
504 | noio_flag = memalloc_noio_save(); |
505 | ret = disk->fops->report_zones(disk, 0, UINT_MAX, | |
506 | blk_revalidate_zone_cb, &args); | |
507 | memalloc_noio_restore(noio_flag); | |
bf505456 | 508 | |
bf505456 | 509 | /* |
6c6b3549 CH |
510 | * Install the new bitmaps and update nr_zones only once the queue is |
511 | * stopped and all I/Os are completed (i.e. a scheduler is not | |
512 | * referencing the bitmaps). | |
bf505456 DLM |
513 | */ |
514 | blk_mq_freeze_queue(q); | |
d4100351 | 515 | if (ret >= 0) { |
6c6b3549 | 516 | blk_queue_chunk_sectors(q, args.zone_sectors); |
e94f5819 | 517 | q->nr_zones = args.nr_zones; |
d4100351 | 518 | swap(q->seq_zones_wlock, args.seq_zones_wlock); |
f216fdd7 | 519 | swap(q->conv_zones_bitmap, args.conv_zones_bitmap); |
e732671a DLM |
520 | if (update_driver_data) |
521 | update_driver_data(disk); | |
d4100351 CH |
522 | ret = 0; |
523 | } else { | |
bf505456 | 524 | pr_warn("%s: failed to revalidate zones\n", disk->disk_name); |
bf505456 | 525 | blk_queue_free_zone_bitmaps(q); |
bf505456 | 526 | } |
d4100351 | 527 | blk_mq_unfreeze_queue(q); |
bf505456 | 528 | |
d4100351 | 529 | kfree(args.seq_zones_wlock); |
f216fdd7 | 530 | kfree(args.conv_zones_bitmap); |
bf505456 DLM |
531 | return ret; |
532 | } | |
533 | EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); |