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 | ||
6cc77e9c CH |
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->seq_zones_wlock) | |
61 | return false; | |
62 | ||
63 | if (blk_rq_is_passthrough(rq)) | |
64 | return false; | |
65 | ||
66 | switch (req_op(rq)) { | |
67 | case REQ_OP_WRITE_ZEROES: | |
68 | case REQ_OP_WRITE_SAME: | |
69 | case REQ_OP_WRITE: | |
70 | return blk_rq_zone_is_seq(rq); | |
71 | default: | |
72 | return false; | |
73 | } | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock); | |
76 | ||
1392d370 JT |
77 | bool blk_req_zone_write_trylock(struct request *rq) |
78 | { | |
79 | unsigned int zno = blk_rq_zone_no(rq); | |
80 | ||
81 | if (test_and_set_bit(zno, rq->q->seq_zones_wlock)) | |
82 | return false; | |
83 | ||
84 | WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); | |
85 | rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; | |
86 | ||
87 | return true; | |
88 | } | |
89 | EXPORT_SYMBOL_GPL(blk_req_zone_write_trylock); | |
90 | ||
6cc77e9c CH |
91 | void __blk_req_zone_write_lock(struct request *rq) |
92 | { | |
93 | if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq), | |
94 | rq->q->seq_zones_wlock))) | |
95 | return; | |
96 | ||
97 | WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); | |
98 | rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_lock); | |
101 | ||
102 | void __blk_req_zone_write_unlock(struct request *rq) | |
103 | { | |
104 | rq->rq_flags &= ~RQF_ZONE_WRITE_LOCKED; | |
105 | if (rq->q->seq_zones_wlock) | |
106 | WARN_ON_ONCE(!test_and_clear_bit(blk_rq_zone_no(rq), | |
107 | rq->q->seq_zones_wlock)); | |
108 | } | |
109 | EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); | |
110 | ||
a91e1380 DLM |
111 | /** |
112 | * blkdev_nr_zones - Get number of zones | |
9b38bb4b | 113 | * @disk: Target gendisk |
a91e1380 | 114 | * |
9b38bb4b CH |
115 | * Return the total number of zones of a zoned block device. For a block |
116 | * device without zone capabilities, the number of zones is always 0. | |
a91e1380 | 117 | */ |
9b38bb4b | 118 | unsigned int blkdev_nr_zones(struct gendisk *disk) |
a91e1380 | 119 | { |
9b38bb4b | 120 | sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); |
a91e1380 | 121 | |
9b38bb4b | 122 | if (!blk_queue_is_zoned(disk->queue)) |
a91e1380 | 123 | return 0; |
9b38bb4b | 124 | return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); |
a91e1380 DLM |
125 | } |
126 | EXPORT_SYMBOL_GPL(blkdev_nr_zones); | |
127 | ||
6a0cb1bc HR |
128 | /** |
129 | * blkdev_report_zones - Get zones information | |
130 | * @bdev: Target block device | |
131 | * @sector: Sector from which to report zones | |
d4100351 CH |
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 | |
6a0cb1bc HR |
135 | * |
136 | * Description: | |
d4100351 CH |
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. | |
6a0cb1bc | 146 | */ |
e76239a3 | 147 | int blkdev_report_zones(struct block_device *bdev, sector_t sector, |
d4100351 | 148 | unsigned int nr_zones, report_zones_cb cb, void *data) |
6a0cb1bc | 149 | { |
ceeb373a | 150 | struct gendisk *disk = bdev->bd_disk; |
5eac3eb3 | 151 | sector_t capacity = get_capacity(disk); |
6a0cb1bc | 152 | |
d4100351 CH |
153 | if (!blk_queue_is_zoned(bdev_get_queue(bdev)) || |
154 | WARN_ON_ONCE(!disk->fops->report_zones)) | |
e76239a3 | 155 | return -EOPNOTSUPP; |
6a0cb1bc | 156 | |
d4100351 | 157 | if (!nr_zones || sector >= capacity) |
6a0cb1bc | 158 | return 0; |
6a0cb1bc | 159 | |
d4100351 | 160 | return disk->fops->report_zones(disk, sector, nr_zones, cb, data); |
6a0cb1bc HR |
161 | } |
162 | EXPORT_SYMBOL_GPL(blkdev_report_zones); | |
163 | ||
1ee533ec DLM |
164 | static inline unsigned long *blk_alloc_zone_bitmap(int node, |
165 | unsigned int nr_zones) | |
6e33dbf2 | 166 | { |
1ee533ec DLM |
167 | return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long), |
168 | GFP_NOIO, node); | |
169 | } | |
6e33dbf2 | 170 | |
1ee533ec DLM |
171 | static int blk_zone_need_reset_cb(struct blk_zone *zone, unsigned int idx, |
172 | void *data) | |
173 | { | |
6e33dbf2 | 174 | /* |
1ee533ec DLM |
175 | * For an all-zones reset, ignore conventional, empty, read-only |
176 | * and offline zones. | |
6e33dbf2 | 177 | */ |
1ee533ec DLM |
178 | switch (zone->cond) { |
179 | case BLK_ZONE_COND_NOT_WP: | |
180 | case BLK_ZONE_COND_EMPTY: | |
181 | case BLK_ZONE_COND_READONLY: | |
182 | case BLK_ZONE_COND_OFFLINE: | |
183 | return 0; | |
184 | default: | |
185 | set_bit(idx, (unsigned long *)data); | |
186 | return 0; | |
187 | } | |
188 | } | |
189 | ||
190 | static int blkdev_zone_reset_all_emulated(struct block_device *bdev, | |
191 | gfp_t gfp_mask) | |
192 | { | |
193 | struct request_queue *q = bdev_get_queue(bdev); | |
194 | sector_t capacity = get_capacity(bdev->bd_disk); | |
195 | sector_t zone_sectors = blk_queue_zone_sectors(q); | |
196 | unsigned long *need_reset; | |
197 | struct bio *bio = NULL; | |
198 | sector_t sector = 0; | |
199 | int ret; | |
200 | ||
201 | need_reset = blk_alloc_zone_bitmap(q->node, q->nr_zones); | |
202 | if (!need_reset) | |
203 | return -ENOMEM; | |
204 | ||
205 | ret = bdev->bd_disk->fops->report_zones(bdev->bd_disk, 0, | |
206 | q->nr_zones, blk_zone_need_reset_cb, | |
207 | need_reset); | |
208 | if (ret < 0) | |
209 | goto out_free_need_reset; | |
210 | ||
211 | ret = 0; | |
212 | while (sector < capacity) { | |
213 | if (!test_bit(blk_queue_zone_no(q, sector), need_reset)) { | |
214 | sector += zone_sectors; | |
215 | continue; | |
216 | } | |
217 | ||
0a3140ea CK |
218 | bio = blk_next_bio(bio, bdev, 0, REQ_OP_ZONE_RESET | REQ_SYNC, |
219 | gfp_mask); | |
1ee533ec DLM |
220 | bio->bi_iter.bi_sector = sector; |
221 | sector += zone_sectors; | |
222 | ||
223 | /* This may take a while, so be nice to others */ | |
224 | cond_resched(); | |
225 | } | |
226 | ||
227 | if (bio) { | |
228 | ret = submit_bio_wait(bio); | |
229 | bio_put(bio); | |
230 | } | |
231 | ||
232 | out_free_need_reset: | |
233 | kfree(need_reset); | |
234 | return ret; | |
235 | } | |
236 | ||
237 | static int blkdev_zone_reset_all(struct block_device *bdev, gfp_t gfp_mask) | |
238 | { | |
239 | struct bio bio; | |
240 | ||
241 | bio_init(&bio, NULL, 0); | |
242 | bio_set_dev(&bio, bdev); | |
243 | bio.bi_opf = REQ_OP_ZONE_RESET_ALL | REQ_SYNC; | |
244 | ||
245 | return submit_bio_wait(&bio); | |
6e33dbf2 CK |
246 | } |
247 | ||
6a0cb1bc | 248 | /** |
6c1b1da5 | 249 | * blkdev_zone_mgmt - Execute a zone management operation on a range of zones |
6a0cb1bc | 250 | * @bdev: Target block device |
6c1b1da5 AJ |
251 | * @op: Operation to be performed on the zones |
252 | * @sector: Start sector of the first zone to operate on | |
253 | * @nr_sectors: Number of sectors, should be at least the length of one zone and | |
254 | * must be zone size aligned. | |
6a0cb1bc HR |
255 | * @gfp_mask: Memory allocation flags (for bio_alloc) |
256 | * | |
257 | * Description: | |
6c1b1da5 | 258 | * Perform the specified operation on the range of zones specified by |
6a0cb1bc HR |
259 | * @sector..@sector+@nr_sectors. Specifying the entire disk sector range |
260 | * is valid, but the specified range should not contain conventional zones. | |
6c1b1da5 AJ |
261 | * The operation to execute on each zone can be a zone reset, open, close |
262 | * or finish request. | |
6a0cb1bc | 263 | */ |
6c1b1da5 AJ |
264 | int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, |
265 | sector_t sector, sector_t nr_sectors, | |
266 | gfp_t gfp_mask) | |
6a0cb1bc HR |
267 | { |
268 | struct request_queue *q = bdev_get_queue(bdev); | |
6c1b1da5 | 269 | sector_t zone_sectors = blk_queue_zone_sectors(q); |
5eac3eb3 | 270 | sector_t capacity = get_capacity(bdev->bd_disk); |
6a0cb1bc | 271 | sector_t end_sector = sector + nr_sectors; |
a2d6b3a2 | 272 | struct bio *bio = NULL; |
1ee533ec | 273 | int ret = 0; |
6a0cb1bc | 274 | |
6a0cb1bc HR |
275 | if (!blk_queue_is_zoned(q)) |
276 | return -EOPNOTSUPP; | |
277 | ||
a2d6b3a2 DLM |
278 | if (bdev_read_only(bdev)) |
279 | return -EPERM; | |
280 | ||
6c1b1da5 AJ |
281 | if (!op_is_zone_mgmt(op)) |
282 | return -EOPNOTSUPP; | |
283 | ||
11bde986 | 284 | if (end_sector <= sector || end_sector > capacity) |
6a0cb1bc HR |
285 | /* Out of range */ |
286 | return -EINVAL; | |
287 | ||
288 | /* Check alignment (handle eventual smaller last zone) */ | |
6a0cb1bc HR |
289 | if (sector & (zone_sectors - 1)) |
290 | return -EINVAL; | |
291 | ||
5eac3eb3 | 292 | if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity) |
6a0cb1bc HR |
293 | return -EINVAL; |
294 | ||
1ee533ec DLM |
295 | /* |
296 | * In the case of a zone reset operation over all zones, | |
297 | * REQ_OP_ZONE_RESET_ALL can be used with devices supporting this | |
298 | * command. For other devices, we emulate this command behavior by | |
299 | * identifying the zones needing a reset. | |
300 | */ | |
301 | if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity) { | |
302 | if (!blk_queue_zone_resetall(q)) | |
303 | return blkdev_zone_reset_all_emulated(bdev, gfp_mask); | |
304 | return blkdev_zone_reset_all(bdev, gfp_mask); | |
305 | } | |
306 | ||
6a0cb1bc | 307 | while (sector < end_sector) { |
0a3140ea | 308 | bio = blk_next_bio(bio, bdev, 0, op | REQ_SYNC, gfp_mask); |
c7a1d926 | 309 | bio->bi_iter.bi_sector = sector; |
6a0cb1bc HR |
310 | sector += zone_sectors; |
311 | ||
312 | /* This may take a while, so be nice to others */ | |
313 | cond_resched(); | |
6a0cb1bc HR |
314 | } |
315 | ||
a2d6b3a2 DLM |
316 | ret = submit_bio_wait(bio); |
317 | bio_put(bio); | |
318 | ||
a2d6b3a2 | 319 | return ret; |
6a0cb1bc | 320 | } |
6c1b1da5 | 321 | EXPORT_SYMBOL_GPL(blkdev_zone_mgmt); |
3ed05a98 | 322 | |
d4100351 CH |
323 | struct zone_report_args { |
324 | struct blk_zone __user *zones; | |
325 | }; | |
326 | ||
327 | static int blkdev_copy_zone_to_user(struct blk_zone *zone, unsigned int idx, | |
328 | void *data) | |
329 | { | |
330 | struct zone_report_args *args = data; | |
331 | ||
332 | if (copy_to_user(&args->zones[idx], zone, sizeof(struct blk_zone))) | |
333 | return -EFAULT; | |
334 | return 0; | |
335 | } | |
336 | ||
56c4bddb | 337 | /* |
3ed05a98 ST |
338 | * BLKREPORTZONE ioctl processing. |
339 | * Called from blkdev_ioctl. | |
340 | */ | |
341 | int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, | |
342 | unsigned int cmd, unsigned long arg) | |
343 | { | |
344 | void __user *argp = (void __user *)arg; | |
d4100351 | 345 | struct zone_report_args args; |
3ed05a98 ST |
346 | struct request_queue *q; |
347 | struct blk_zone_report rep; | |
3ed05a98 ST |
348 | int ret; |
349 | ||
350 | if (!argp) | |
351 | return -EINVAL; | |
352 | ||
353 | q = bdev_get_queue(bdev); | |
354 | if (!q) | |
355 | return -ENXIO; | |
356 | ||
357 | if (!blk_queue_is_zoned(q)) | |
358 | return -ENOTTY; | |
359 | ||
3ed05a98 ST |
360 | if (copy_from_user(&rep, argp, sizeof(struct blk_zone_report))) |
361 | return -EFAULT; | |
362 | ||
363 | if (!rep.nr_zones) | |
364 | return -EINVAL; | |
365 | ||
d4100351 CH |
366 | args.zones = argp + sizeof(struct blk_zone_report); |
367 | ret = blkdev_report_zones(bdev, rep.sector, rep.nr_zones, | |
368 | blkdev_copy_zone_to_user, &args); | |
369 | if (ret < 0) | |
370 | return ret; | |
3ed05a98 | 371 | |
d4100351 | 372 | rep.nr_zones = ret; |
82394db7 | 373 | rep.flags = BLK_ZONE_REP_CAPACITY; |
d4100351 CH |
374 | if (copy_to_user(argp, &rep, sizeof(struct blk_zone_report))) |
375 | return -EFAULT; | |
376 | return 0; | |
3ed05a98 ST |
377 | } |
378 | ||
e5113505 SK |
379 | static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode, |
380 | const struct blk_zone_range *zrange) | |
381 | { | |
382 | loff_t start, end; | |
383 | ||
384 | if (zrange->sector + zrange->nr_sectors <= zrange->sector || | |
385 | zrange->sector + zrange->nr_sectors > get_capacity(bdev->bd_disk)) | |
386 | /* Out of range */ | |
387 | return -EINVAL; | |
388 | ||
389 | start = zrange->sector << SECTOR_SHIFT; | |
390 | end = ((zrange->sector + zrange->nr_sectors) << SECTOR_SHIFT) - 1; | |
391 | ||
392 | return truncate_bdev_range(bdev, mode, start, end); | |
393 | } | |
394 | ||
56c4bddb | 395 | /* |
e876df1f | 396 | * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing. |
3ed05a98 ST |
397 | * Called from blkdev_ioctl. |
398 | */ | |
e876df1f AJ |
399 | int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, |
400 | unsigned int cmd, unsigned long arg) | |
3ed05a98 ST |
401 | { |
402 | void __user *argp = (void __user *)arg; | |
403 | struct request_queue *q; | |
404 | struct blk_zone_range zrange; | |
e876df1f | 405 | enum req_opf op; |
e5113505 | 406 | int ret; |
3ed05a98 ST |
407 | |
408 | if (!argp) | |
409 | return -EINVAL; | |
410 | ||
411 | q = bdev_get_queue(bdev); | |
412 | if (!q) | |
413 | return -ENXIO; | |
414 | ||
415 | if (!blk_queue_is_zoned(q)) | |
416 | return -ENOTTY; | |
417 | ||
3ed05a98 ST |
418 | if (!(mode & FMODE_WRITE)) |
419 | return -EBADF; | |
420 | ||
421 | if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range))) | |
422 | return -EFAULT; | |
423 | ||
e876df1f AJ |
424 | switch (cmd) { |
425 | case BLKRESETZONE: | |
426 | op = REQ_OP_ZONE_RESET; | |
e5113505 SK |
427 | |
428 | /* Invalidate the page cache, including dirty pages. */ | |
86399ea0 | 429 | filemap_invalidate_lock(bdev->bd_inode->i_mapping); |
e5113505 SK |
430 | ret = blkdev_truncate_zone_range(bdev, mode, &zrange); |
431 | if (ret) | |
86399ea0 | 432 | goto fail; |
e876df1f AJ |
433 | break; |
434 | case BLKOPENZONE: | |
435 | op = REQ_OP_ZONE_OPEN; | |
436 | break; | |
437 | case BLKCLOSEZONE: | |
438 | op = REQ_OP_ZONE_CLOSE; | |
439 | break; | |
440 | case BLKFINISHZONE: | |
441 | op = REQ_OP_ZONE_FINISH; | |
442 | break; | |
443 | default: | |
444 | return -ENOTTY; | |
445 | } | |
446 | ||
e5113505 SK |
447 | ret = blkdev_zone_mgmt(bdev, op, zrange.sector, zrange.nr_sectors, |
448 | GFP_KERNEL); | |
449 | ||
86399ea0 SK |
450 | fail: |
451 | if (cmd == BLKRESETZONE) | |
452 | filemap_invalidate_unlock(bdev->bd_inode->i_mapping); | |
e5113505 SK |
453 | |
454 | return ret; | |
3ed05a98 | 455 | } |
bf505456 | 456 | |
bf505456 DLM |
457 | void blk_queue_free_zone_bitmaps(struct request_queue *q) |
458 | { | |
f216fdd7 CH |
459 | kfree(q->conv_zones_bitmap); |
460 | q->conv_zones_bitmap = NULL; | |
bf505456 DLM |
461 | kfree(q->seq_zones_wlock); |
462 | q->seq_zones_wlock = NULL; | |
463 | } | |
464 | ||
d4100351 CH |
465 | struct blk_revalidate_zone_args { |
466 | struct gendisk *disk; | |
f216fdd7 | 467 | unsigned long *conv_zones_bitmap; |
d4100351 | 468 | unsigned long *seq_zones_wlock; |
e94f5819 | 469 | unsigned int nr_zones; |
6c6b3549 | 470 | sector_t zone_sectors; |
d4100351 CH |
471 | sector_t sector; |
472 | }; | |
473 | ||
d9dd7308 DLM |
474 | /* |
475 | * Helper function to check the validity of zones of a zoned block device. | |
476 | */ | |
d4100351 CH |
477 | static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, |
478 | void *data) | |
d9dd7308 | 479 | { |
d4100351 CH |
480 | struct blk_revalidate_zone_args *args = data; |
481 | struct gendisk *disk = args->disk; | |
d9dd7308 | 482 | struct request_queue *q = disk->queue; |
d9dd7308 DLM |
483 | sector_t capacity = get_capacity(disk); |
484 | ||
485 | /* | |
486 | * All zones must have the same size, with the exception on an eventual | |
487 | * smaller last zone. | |
488 | */ | |
6c6b3549 CH |
489 | if (zone->start == 0) { |
490 | if (zone->len == 0 || !is_power_of_2(zone->len)) { | |
491 | pr_warn("%s: Invalid zoned device with non power of two zone size (%llu)\n", | |
492 | disk->disk_name, zone->len); | |
493 | return -ENODEV; | |
494 | } | |
d9dd7308 | 495 | |
6c6b3549 CH |
496 | args->zone_sectors = zone->len; |
497 | args->nr_zones = (capacity + zone->len - 1) >> ilog2(zone->len); | |
498 | } else if (zone->start + args->zone_sectors < capacity) { | |
499 | if (zone->len != args->zone_sectors) { | |
500 | pr_warn("%s: Invalid zoned device with non constant zone size\n", | |
501 | disk->disk_name); | |
502 | return -ENODEV; | |
503 | } | |
504 | } else { | |
505 | if (zone->len > args->zone_sectors) { | |
506 | pr_warn("%s: Invalid zoned device with larger last zone size\n", | |
507 | disk->disk_name); | |
508 | return -ENODEV; | |
509 | } | |
d9dd7308 DLM |
510 | } |
511 | ||
512 | /* Check for holes in the zone report */ | |
d4100351 | 513 | if (zone->start != args->sector) { |
d9dd7308 | 514 | pr_warn("%s: Zone gap at sectors %llu..%llu\n", |
d4100351 CH |
515 | disk->disk_name, args->sector, zone->start); |
516 | return -ENODEV; | |
d9dd7308 DLM |
517 | } |
518 | ||
519 | /* Check zone type */ | |
520 | switch (zone->type) { | |
521 | case BLK_ZONE_TYPE_CONVENTIONAL: | |
e94f5819 CH |
522 | if (!args->conv_zones_bitmap) { |
523 | args->conv_zones_bitmap = | |
524 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
525 | if (!args->conv_zones_bitmap) | |
526 | return -ENOMEM; | |
527 | } | |
528 | set_bit(idx, args->conv_zones_bitmap); | |
529 | break; | |
d9dd7308 DLM |
530 | case BLK_ZONE_TYPE_SEQWRITE_REQ: |
531 | case BLK_ZONE_TYPE_SEQWRITE_PREF: | |
e94f5819 CH |
532 | if (!args->seq_zones_wlock) { |
533 | args->seq_zones_wlock = | |
534 | blk_alloc_zone_bitmap(q->node, args->nr_zones); | |
535 | if (!args->seq_zones_wlock) | |
536 | return -ENOMEM; | |
537 | } | |
d9dd7308 DLM |
538 | break; |
539 | default: | |
540 | pr_warn("%s: Invalid zone type 0x%x at sectors %llu\n", | |
541 | disk->disk_name, (int)zone->type, zone->start); | |
d4100351 | 542 | return -ENODEV; |
d9dd7308 DLM |
543 | } |
544 | ||
d4100351 CH |
545 | args->sector += zone->len; |
546 | return 0; | |
547 | } | |
548 | ||
bf505456 DLM |
549 | /** |
550 | * blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps | |
551 | * @disk: Target disk | |
e732671a | 552 | * @update_driver_data: Callback to update driver data on the frozen disk |
bf505456 DLM |
553 | * |
554 | * Helper function for low-level device drivers to (re) allocate and initialize | |
555 | * a disk request queue zone bitmaps. This functions should normally be called | |
ae58954d CH |
556 | * within the disk ->revalidate method for blk-mq based drivers. For BIO based |
557 | * drivers only q->nr_zones needs to be updated so that the sysfs exposed value | |
558 | * is correct. | |
e732671a DLM |
559 | * If the @update_driver_data callback function is not NULL, the callback is |
560 | * executed with the device request queue frozen after all zones have been | |
561 | * checked. | |
bf505456 | 562 | */ |
e732671a DLM |
563 | int blk_revalidate_disk_zones(struct gendisk *disk, |
564 | void (*update_driver_data)(struct gendisk *disk)) | |
bf505456 DLM |
565 | { |
566 | struct request_queue *q = disk->queue; | |
e94f5819 CH |
567 | struct blk_revalidate_zone_args args = { |
568 | .disk = disk, | |
e94f5819 | 569 | }; |
6c6b3549 CH |
570 | unsigned int noio_flag; |
571 | int ret; | |
bf505456 | 572 | |
c98c3d09 CH |
573 | if (WARN_ON_ONCE(!blk_queue_is_zoned(q))) |
574 | return -EIO; | |
ae58954d CH |
575 | if (WARN_ON_ONCE(!queue_is_mq(q))) |
576 | return -EIO; | |
bf505456 | 577 | |
1a1206dc JT |
578 | if (!get_capacity(disk)) |
579 | return -EIO; | |
580 | ||
e94f5819 | 581 | /* |
6c6b3549 CH |
582 | * Ensure that all memory allocations in this context are done as if |
583 | * GFP_NOIO was specified. | |
e94f5819 | 584 | */ |
6c6b3549 CH |
585 | noio_flag = memalloc_noio_save(); |
586 | ret = disk->fops->report_zones(disk, 0, UINT_MAX, | |
587 | blk_revalidate_zone_cb, &args); | |
2afdeb23 DLM |
588 | if (!ret) { |
589 | pr_warn("%s: No zones reported\n", disk->disk_name); | |
590 | ret = -ENODEV; | |
591 | } | |
6c6b3549 | 592 | memalloc_noio_restore(noio_flag); |
bf505456 | 593 | |
2afdeb23 DLM |
594 | /* |
595 | * If zones where reported, make sure that the entire disk capacity | |
596 | * has been checked. | |
597 | */ | |
598 | if (ret > 0 && args.sector != get_capacity(disk)) { | |
599 | pr_warn("%s: Missing zones from sector %llu\n", | |
600 | disk->disk_name, args.sector); | |
601 | ret = -ENODEV; | |
602 | } | |
603 | ||
bf505456 | 604 | /* |
6c6b3549 CH |
605 | * Install the new bitmaps and update nr_zones only once the queue is |
606 | * stopped and all I/Os are completed (i.e. a scheduler is not | |
607 | * referencing the bitmaps). | |
bf505456 DLM |
608 | */ |
609 | blk_mq_freeze_queue(q); | |
2afdeb23 | 610 | if (ret > 0) { |
6c6b3549 | 611 | blk_queue_chunk_sectors(q, args.zone_sectors); |
e94f5819 | 612 | q->nr_zones = args.nr_zones; |
d4100351 | 613 | swap(q->seq_zones_wlock, args.seq_zones_wlock); |
f216fdd7 | 614 | swap(q->conv_zones_bitmap, args.conv_zones_bitmap); |
e732671a DLM |
615 | if (update_driver_data) |
616 | update_driver_data(disk); | |
d4100351 CH |
617 | ret = 0; |
618 | } else { | |
bf505456 | 619 | pr_warn("%s: failed to revalidate zones\n", disk->disk_name); |
bf505456 | 620 | blk_queue_free_zone_bitmaps(q); |
bf505456 | 621 | } |
d4100351 | 622 | blk_mq_unfreeze_queue(q); |
bf505456 | 623 | |
d4100351 | 624 | kfree(args.seq_zones_wlock); |
f216fdd7 | 625 | kfree(args.conv_zones_bitmap); |
bf505456 DLM |
626 | return ret; |
627 | } | |
628 | EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); | |
508aebb8 DLM |
629 | |
630 | void blk_queue_clear_zone_settings(struct request_queue *q) | |
631 | { | |
632 | blk_mq_freeze_queue(q); | |
633 | ||
634 | blk_queue_free_zone_bitmaps(q); | |
635 | blk_queue_flag_clear(QUEUE_FLAG_ZONE_RESETALL, q); | |
636 | q->required_elevator_features &= ~ELEVATOR_F_ZBD_SEQ_WRITE; | |
637 | q->nr_zones = 0; | |
638 | q->max_open_zones = 0; | |
639 | q->max_active_zones = 0; | |
640 | q->limits.chunk_sectors = 0; | |
641 | q->limits.zone_write_granularity = 0; | |
642 | q->limits.max_zone_append_sectors = 0; | |
643 | ||
644 | blk_mq_unfreeze_queue(q); | |
645 | } |