Commit | Line | Data |
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5b316468 NA |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
1cd6121f | 3 | #include <linux/bitops.h> |
5b316468 NA |
4 | #include <linux/slab.h> |
5 | #include <linux/blkdev.h> | |
08e11a3d | 6 | #include <linux/sched/mm.h> |
ea6f8ddc | 7 | #include <linux/atomic.h> |
16beac87 | 8 | #include <linux/vmalloc.h> |
5b316468 NA |
9 | #include "ctree.h" |
10 | #include "volumes.h" | |
11 | #include "zoned.h" | |
12 | #include "rcu-string.h" | |
1cd6121f | 13 | #include "disk-io.h" |
08e11a3d | 14 | #include "block-group.h" |
d3575156 | 15 | #include "transaction.h" |
6143c23c | 16 | #include "dev-replace.h" |
7db1c5d1 | 17 | #include "space-info.h" |
5b316468 NA |
18 | |
19 | /* Maximum number of zones to report per blkdev_report_zones() call */ | |
20 | #define BTRFS_REPORT_NR_ZONES 4096 | |
08e11a3d NA |
21 | /* Invalid allocation pointer value for missing devices */ |
22 | #define WP_MISSING_DEV ((u64)-1) | |
23 | /* Pseudo write pointer value for conventional zone */ | |
24 | #define WP_CONVENTIONAL ((u64)-2) | |
5b316468 | 25 | |
53b74fa9 NA |
26 | /* |
27 | * Location of the first zone of superblock logging zone pairs. | |
28 | * | |
29 | * - primary superblock: 0B (zone 0) | |
30 | * - first copy: 512G (zone starting at that offset) | |
31 | * - second copy: 4T (zone starting at that offset) | |
32 | */ | |
33 | #define BTRFS_SB_LOG_PRIMARY_OFFSET (0ULL) | |
34 | #define BTRFS_SB_LOG_FIRST_OFFSET (512ULL * SZ_1G) | |
35 | #define BTRFS_SB_LOG_SECOND_OFFSET (4096ULL * SZ_1G) | |
36 | ||
37 | #define BTRFS_SB_LOG_FIRST_SHIFT const_ilog2(BTRFS_SB_LOG_FIRST_OFFSET) | |
38 | #define BTRFS_SB_LOG_SECOND_SHIFT const_ilog2(BTRFS_SB_LOG_SECOND_OFFSET) | |
39 | ||
12659251 NA |
40 | /* Number of superblock log zones */ |
41 | #define BTRFS_NR_SB_LOG_ZONES 2 | |
42 | ||
ea6f8ddc NA |
43 | /* |
44 | * Minimum of active zones we need: | |
45 | * | |
46 | * - BTRFS_SUPER_MIRROR_MAX zones for superblock mirrors | |
47 | * - 3 zones to ensure at least one zone per SYSTEM, META and DATA block group | |
48 | * - 1 zone for tree-log dedicated block group | |
49 | * - 1 zone for relocation | |
50 | */ | |
51 | #define BTRFS_MIN_ACTIVE_ZONES (BTRFS_SUPER_MIRROR_MAX + 5) | |
52 | ||
53b74fa9 | 53 | /* |
0a05fafe JT |
54 | * Minimum / maximum supported zone size. Currently, SMR disks have a zone |
55 | * size of 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range. | |
56 | * We do not expect the zone size to become larger than 8GiB or smaller than | |
57 | * 4MiB in the near future. | |
53b74fa9 NA |
58 | */ |
59 | #define BTRFS_MAX_ZONE_SIZE SZ_8G | |
0a05fafe | 60 | #define BTRFS_MIN_ZONE_SIZE SZ_4M |
53b74fa9 | 61 | |
5daaf552 NA |
62 | #define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT) |
63 | ||
64 | static inline bool sb_zone_is_full(const struct blk_zone *zone) | |
65 | { | |
66 | return (zone->cond == BLK_ZONE_COND_FULL) || | |
67 | (zone->wp + SUPER_INFO_SECTORS > zone->start + zone->capacity); | |
68 | } | |
69 | ||
5b316468 NA |
70 | static int copy_zone_info_cb(struct blk_zone *zone, unsigned int idx, void *data) |
71 | { | |
72 | struct blk_zone *zones = data; | |
73 | ||
74 | memcpy(&zones[idx], zone, sizeof(*zone)); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
12659251 NA |
79 | static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones, |
80 | u64 *wp_ret) | |
81 | { | |
82 | bool empty[BTRFS_NR_SB_LOG_ZONES]; | |
83 | bool full[BTRFS_NR_SB_LOG_ZONES]; | |
84 | sector_t sector; | |
5daaf552 | 85 | int i; |
12659251 | 86 | |
5daaf552 NA |
87 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
88 | ASSERT(zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL); | |
89 | empty[i] = (zones[i].cond == BLK_ZONE_COND_EMPTY); | |
90 | full[i] = sb_zone_is_full(&zones[i]); | |
91 | } | |
12659251 NA |
92 | |
93 | /* | |
94 | * Possible states of log buffer zones | |
95 | * | |
96 | * Empty[0] In use[0] Full[0] | |
31f37269 PR |
97 | * Empty[1] * 0 1 |
98 | * In use[1] x x 1 | |
99 | * Full[1] 0 0 C | |
12659251 NA |
100 | * |
101 | * Log position: | |
102 | * *: Special case, no superblock is written | |
103 | * 0: Use write pointer of zones[0] | |
104 | * 1: Use write pointer of zones[1] | |
1a9fd417 | 105 | * C: Compare super blocks from zones[0] and zones[1], use the latest |
12659251 NA |
106 | * one determined by generation |
107 | * x: Invalid state | |
108 | */ | |
109 | ||
110 | if (empty[0] && empty[1]) { | |
111 | /* Special case to distinguish no superblock to read */ | |
112 | *wp_ret = zones[0].start << SECTOR_SHIFT; | |
113 | return -ENOENT; | |
114 | } else if (full[0] && full[1]) { | |
115 | /* Compare two super blocks */ | |
116 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
117 | struct page *page[BTRFS_NR_SB_LOG_ZONES]; | |
118 | struct btrfs_super_block *super[BTRFS_NR_SB_LOG_ZONES]; | |
119 | int i; | |
120 | ||
121 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { | |
122 | u64 bytenr; | |
123 | ||
124 | bytenr = ((zones[i].start + zones[i].len) | |
125 | << SECTOR_SHIFT) - BTRFS_SUPER_INFO_SIZE; | |
126 | ||
127 | page[i] = read_cache_page_gfp(mapping, | |
128 | bytenr >> PAGE_SHIFT, GFP_NOFS); | |
129 | if (IS_ERR(page[i])) { | |
130 | if (i == 1) | |
131 | btrfs_release_disk_super(super[0]); | |
132 | return PTR_ERR(page[i]); | |
133 | } | |
134 | super[i] = page_address(page[i]); | |
135 | } | |
136 | ||
137 | if (super[0]->generation > super[1]->generation) | |
138 | sector = zones[1].start; | |
139 | else | |
140 | sector = zones[0].start; | |
141 | ||
142 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) | |
143 | btrfs_release_disk_super(super[i]); | |
144 | } else if (!full[0] && (empty[1] || full[1])) { | |
145 | sector = zones[0].wp; | |
146 | } else if (full[0]) { | |
147 | sector = zones[1].wp; | |
148 | } else { | |
149 | return -EUCLEAN; | |
150 | } | |
151 | *wp_ret = sector << SECTOR_SHIFT; | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* | |
53b74fa9 | 156 | * Get the first zone number of the superblock mirror |
12659251 NA |
157 | */ |
158 | static inline u32 sb_zone_number(int shift, int mirror) | |
159 | { | |
53b74fa9 | 160 | u64 zone; |
12659251 | 161 | |
53b74fa9 | 162 | ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX); |
12659251 | 163 | switch (mirror) { |
53b74fa9 NA |
164 | case 0: zone = 0; break; |
165 | case 1: zone = 1ULL << (BTRFS_SB_LOG_FIRST_SHIFT - shift); break; | |
166 | case 2: zone = 1ULL << (BTRFS_SB_LOG_SECOND_SHIFT - shift); break; | |
12659251 NA |
167 | } |
168 | ||
53b74fa9 NA |
169 | ASSERT(zone <= U32_MAX); |
170 | ||
171 | return (u32)zone; | |
12659251 NA |
172 | } |
173 | ||
5b434df8 NA |
174 | static inline sector_t zone_start_sector(u32 zone_number, |
175 | struct block_device *bdev) | |
176 | { | |
177 | return (sector_t)zone_number << ilog2(bdev_zone_sectors(bdev)); | |
178 | } | |
179 | ||
180 | static inline u64 zone_start_physical(u32 zone_number, | |
181 | struct btrfs_zoned_device_info *zone_info) | |
182 | { | |
183 | return (u64)zone_number << zone_info->zone_size_shift; | |
184 | } | |
185 | ||
3c9daa09 JT |
186 | /* |
187 | * Emulate blkdev_report_zones() for a non-zoned device. It slices up the block | |
188 | * device into static sized chunks and fake a conventional zone on each of | |
189 | * them. | |
190 | */ | |
191 | static int emulate_report_zones(struct btrfs_device *device, u64 pos, | |
192 | struct blk_zone *zones, unsigned int nr_zones) | |
193 | { | |
194 | const sector_t zone_sectors = device->fs_info->zone_size >> SECTOR_SHIFT; | |
195 | sector_t bdev_size = bdev_nr_sectors(device->bdev); | |
196 | unsigned int i; | |
197 | ||
198 | pos >>= SECTOR_SHIFT; | |
199 | for (i = 0; i < nr_zones; i++) { | |
200 | zones[i].start = i * zone_sectors + pos; | |
201 | zones[i].len = zone_sectors; | |
202 | zones[i].capacity = zone_sectors; | |
203 | zones[i].wp = zones[i].start + zone_sectors; | |
204 | zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL; | |
205 | zones[i].cond = BLK_ZONE_COND_NOT_WP; | |
206 | ||
207 | if (zones[i].wp >= bdev_size) { | |
208 | i++; | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
213 | return i; | |
214 | } | |
215 | ||
5b316468 NA |
216 | static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos, |
217 | struct blk_zone *zones, unsigned int *nr_zones) | |
218 | { | |
16beac87 NA |
219 | struct btrfs_zoned_device_info *zinfo = device->zone_info; |
220 | u32 zno; | |
5b316468 NA |
221 | int ret; |
222 | ||
223 | if (!*nr_zones) | |
224 | return 0; | |
225 | ||
3c9daa09 JT |
226 | if (!bdev_is_zoned(device->bdev)) { |
227 | ret = emulate_report_zones(device, pos, zones, *nr_zones); | |
228 | *nr_zones = ret; | |
229 | return 0; | |
230 | } | |
231 | ||
16beac87 NA |
232 | /* Check cache */ |
233 | if (zinfo->zone_cache) { | |
234 | unsigned int i; | |
235 | ||
236 | ASSERT(IS_ALIGNED(pos, zinfo->zone_size)); | |
237 | zno = pos >> zinfo->zone_size_shift; | |
238 | /* | |
239 | * We cannot report zones beyond the zone end. So, it is OK to | |
240 | * cap *nr_zones to at the end. | |
241 | */ | |
242 | *nr_zones = min_t(u32, *nr_zones, zinfo->nr_zones - zno); | |
243 | ||
244 | for (i = 0; i < *nr_zones; i++) { | |
245 | struct blk_zone *zone_info; | |
246 | ||
247 | zone_info = &zinfo->zone_cache[zno + i]; | |
248 | if (!zone_info->len) | |
249 | break; | |
250 | } | |
251 | ||
252 | if (i == *nr_zones) { | |
253 | /* Cache hit on all the zones */ | |
254 | memcpy(zones, zinfo->zone_cache + zno, | |
255 | sizeof(*zinfo->zone_cache) * *nr_zones); | |
256 | return 0; | |
257 | } | |
258 | } | |
259 | ||
5b316468 NA |
260 | ret = blkdev_report_zones(device->bdev, pos >> SECTOR_SHIFT, *nr_zones, |
261 | copy_zone_info_cb, zones); | |
262 | if (ret < 0) { | |
263 | btrfs_err_in_rcu(device->fs_info, | |
264 | "zoned: failed to read zone %llu on %s (devid %llu)", | |
265 | pos, rcu_str_deref(device->name), | |
266 | device->devid); | |
267 | return ret; | |
268 | } | |
269 | *nr_zones = ret; | |
270 | if (!ret) | |
271 | return -EIO; | |
272 | ||
16beac87 NA |
273 | /* Populate cache */ |
274 | if (zinfo->zone_cache) | |
275 | memcpy(zinfo->zone_cache + zno, zones, | |
276 | sizeof(*zinfo->zone_cache) * *nr_zones); | |
277 | ||
5b316468 NA |
278 | return 0; |
279 | } | |
280 | ||
3c9daa09 JT |
281 | /* The emulated zone size is determined from the size of device extent */ |
282 | static int calculate_emulated_zone_size(struct btrfs_fs_info *fs_info) | |
283 | { | |
284 | struct btrfs_path *path; | |
285 | struct btrfs_root *root = fs_info->dev_root; | |
286 | struct btrfs_key key; | |
287 | struct extent_buffer *leaf; | |
288 | struct btrfs_dev_extent *dext; | |
289 | int ret = 0; | |
290 | ||
291 | key.objectid = 1; | |
292 | key.type = BTRFS_DEV_EXTENT_KEY; | |
293 | key.offset = 0; | |
294 | ||
295 | path = btrfs_alloc_path(); | |
296 | if (!path) | |
297 | return -ENOMEM; | |
298 | ||
299 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); | |
300 | if (ret < 0) | |
301 | goto out; | |
302 | ||
303 | if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) { | |
ad9a9378 | 304 | ret = btrfs_next_leaf(root, path); |
3c9daa09 JT |
305 | if (ret < 0) |
306 | goto out; | |
307 | /* No dev extents at all? Not good */ | |
308 | if (ret > 0) { | |
309 | ret = -EUCLEAN; | |
310 | goto out; | |
311 | } | |
312 | } | |
313 | ||
314 | leaf = path->nodes[0]; | |
315 | dext = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent); | |
316 | fs_info->zone_size = btrfs_dev_extent_length(leaf, dext); | |
317 | ret = 0; | |
318 | ||
319 | out: | |
320 | btrfs_free_path(path); | |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
73651042 NA |
325 | int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) |
326 | { | |
327 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
328 | struct btrfs_device *device; | |
329 | int ret = 0; | |
330 | ||
331 | /* fs_info->zone_size might not set yet. Use the incomapt flag here. */ | |
332 | if (!btrfs_fs_incompat(fs_info, ZONED)) | |
333 | return 0; | |
334 | ||
335 | mutex_lock(&fs_devices->device_list_mutex); | |
336 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
337 | /* We can skip reading of zone info for missing devices */ | |
338 | if (!device->bdev) | |
339 | continue; | |
340 | ||
16beac87 | 341 | ret = btrfs_get_dev_zone_info(device, true); |
73651042 NA |
342 | if (ret) |
343 | break; | |
344 | } | |
345 | mutex_unlock(&fs_devices->device_list_mutex); | |
346 | ||
347 | return ret; | |
348 | } | |
349 | ||
16beac87 | 350 | int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache) |
5b316468 | 351 | { |
3c9daa09 | 352 | struct btrfs_fs_info *fs_info = device->fs_info; |
5b316468 NA |
353 | struct btrfs_zoned_device_info *zone_info = NULL; |
354 | struct block_device *bdev = device->bdev; | |
ea6f8ddc NA |
355 | unsigned int max_active_zones; |
356 | unsigned int nactive; | |
5b316468 NA |
357 | sector_t nr_sectors; |
358 | sector_t sector = 0; | |
359 | struct blk_zone *zones = NULL; | |
360 | unsigned int i, nreported = 0, nr_zones; | |
d734492a | 361 | sector_t zone_sectors; |
3c9daa09 | 362 | char *model, *emulated; |
5b316468 NA |
363 | int ret; |
364 | ||
3c9daa09 JT |
365 | /* |
366 | * Cannot use btrfs_is_zoned here, since fs_info::zone_size might not | |
367 | * yet be set. | |
368 | */ | |
369 | if (!btrfs_fs_incompat(fs_info, ZONED)) | |
5b316468 NA |
370 | return 0; |
371 | ||
372 | if (device->zone_info) | |
373 | return 0; | |
374 | ||
375 | zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL); | |
376 | if (!zone_info) | |
377 | return -ENOMEM; | |
378 | ||
16beac87 NA |
379 | device->zone_info = zone_info; |
380 | ||
3c9daa09 JT |
381 | if (!bdev_is_zoned(bdev)) { |
382 | if (!fs_info->zone_size) { | |
383 | ret = calculate_emulated_zone_size(fs_info); | |
384 | if (ret) | |
385 | goto out; | |
386 | } | |
387 | ||
388 | ASSERT(fs_info->zone_size); | |
389 | zone_sectors = fs_info->zone_size >> SECTOR_SHIFT; | |
390 | } else { | |
391 | zone_sectors = bdev_zone_sectors(bdev); | |
392 | } | |
393 | ||
5b316468 NA |
394 | /* Check if it's power of 2 (see is_power_of_2) */ |
395 | ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0); | |
396 | zone_info->zone_size = zone_sectors << SECTOR_SHIFT; | |
53b74fa9 NA |
397 | |
398 | /* We reject devices with a zone size larger than 8GB */ | |
399 | if (zone_info->zone_size > BTRFS_MAX_ZONE_SIZE) { | |
400 | btrfs_err_in_rcu(fs_info, | |
401 | "zoned: %s: zone size %llu larger than supported maximum %llu", | |
402 | rcu_str_deref(device->name), | |
403 | zone_info->zone_size, BTRFS_MAX_ZONE_SIZE); | |
404 | ret = -EINVAL; | |
405 | goto out; | |
0a05fafe JT |
406 | } else if (zone_info->zone_size < BTRFS_MIN_ZONE_SIZE) { |
407 | btrfs_err_in_rcu(fs_info, | |
408 | "zoned: %s: zone size %llu smaller than supported minimum %u", | |
409 | rcu_str_deref(device->name), | |
410 | zone_info->zone_size, BTRFS_MIN_ZONE_SIZE); | |
411 | ret = -EINVAL; | |
412 | goto out; | |
53b74fa9 NA |
413 | } |
414 | ||
415 | nr_sectors = bdev_nr_sectors(bdev); | |
5b316468 NA |
416 | zone_info->zone_size_shift = ilog2(zone_info->zone_size); |
417 | zone_info->nr_zones = nr_sectors >> ilog2(zone_sectors); | |
c2ae7b77 NA |
418 | /* |
419 | * We limit max_zone_append_size also by max_segments * | |
420 | * PAGE_SIZE. Technically, we can have multiple pages per segment. But, | |
421 | * since btrfs adds the pages one by one to a bio, and btrfs cannot | |
422 | * increase the metadata reservation even if it increases the number of | |
423 | * extents, it is safe to stick with the limit. | |
cac5c44c SK |
424 | * |
425 | * With the zoned emulation, we can have non-zoned device on the zoned | |
426 | * mode. In this case, we don't have a valid max zone append size. So, | |
427 | * use max_segments * PAGE_SIZE as the pseudo max_zone_append_size. | |
c2ae7b77 | 428 | */ |
cac5c44c SK |
429 | if (bdev_is_zoned(bdev)) { |
430 | zone_info->max_zone_append_size = min_t(u64, | |
431 | (u64)bdev_max_zone_append_sectors(bdev) << SECTOR_SHIFT, | |
432 | (u64)bdev_max_segments(bdev) << PAGE_SHIFT); | |
433 | } else { | |
434 | zone_info->max_zone_append_size = | |
435 | (u64)bdev_max_segments(bdev) << PAGE_SHIFT; | |
436 | } | |
5b316468 NA |
437 | if (!IS_ALIGNED(nr_sectors, zone_sectors)) |
438 | zone_info->nr_zones++; | |
439 | ||
c1e7b244 | 440 | max_active_zones = bdev_max_active_zones(bdev); |
ea6f8ddc NA |
441 | if (max_active_zones && max_active_zones < BTRFS_MIN_ACTIVE_ZONES) { |
442 | btrfs_err_in_rcu(fs_info, | |
443 | "zoned: %s: max active zones %u is too small, need at least %u active zones", | |
444 | rcu_str_deref(device->name), max_active_zones, | |
445 | BTRFS_MIN_ACTIVE_ZONES); | |
446 | ret = -EINVAL; | |
447 | goto out; | |
448 | } | |
449 | zone_info->max_active_zones = max_active_zones; | |
450 | ||
5b316468 NA |
451 | zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
452 | if (!zone_info->seq_zones) { | |
453 | ret = -ENOMEM; | |
454 | goto out; | |
455 | } | |
456 | ||
457 | zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); | |
458 | if (!zone_info->empty_zones) { | |
459 | ret = -ENOMEM; | |
460 | goto out; | |
461 | } | |
462 | ||
ea6f8ddc NA |
463 | zone_info->active_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
464 | if (!zone_info->active_zones) { | |
465 | ret = -ENOMEM; | |
466 | goto out; | |
467 | } | |
468 | ||
5b316468 NA |
469 | zones = kcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL); |
470 | if (!zones) { | |
471 | ret = -ENOMEM; | |
472 | goto out; | |
473 | } | |
474 | ||
16beac87 NA |
475 | /* |
476 | * Enable zone cache only for a zoned device. On a non-zoned device, we | |
477 | * fill the zone info with emulated CONVENTIONAL zones, so no need to | |
478 | * use the cache. | |
479 | */ | |
480 | if (populate_cache && bdev_is_zoned(device->bdev)) { | |
481 | zone_info->zone_cache = vzalloc(sizeof(struct blk_zone) * | |
482 | zone_info->nr_zones); | |
483 | if (!zone_info->zone_cache) { | |
484 | btrfs_err_in_rcu(device->fs_info, | |
485 | "zoned: failed to allocate zone cache for %s", | |
486 | rcu_str_deref(device->name)); | |
487 | ret = -ENOMEM; | |
488 | goto out; | |
489 | } | |
490 | } | |
491 | ||
5b316468 | 492 | /* Get zones type */ |
ea6f8ddc | 493 | nactive = 0; |
5b316468 NA |
494 | while (sector < nr_sectors) { |
495 | nr_zones = BTRFS_REPORT_NR_ZONES; | |
496 | ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones, | |
497 | &nr_zones); | |
498 | if (ret) | |
499 | goto out; | |
500 | ||
501 | for (i = 0; i < nr_zones; i++) { | |
502 | if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ) | |
503 | __set_bit(nreported, zone_info->seq_zones); | |
ea6f8ddc NA |
504 | switch (zones[i].cond) { |
505 | case BLK_ZONE_COND_EMPTY: | |
5b316468 | 506 | __set_bit(nreported, zone_info->empty_zones); |
ea6f8ddc NA |
507 | break; |
508 | case BLK_ZONE_COND_IMP_OPEN: | |
509 | case BLK_ZONE_COND_EXP_OPEN: | |
510 | case BLK_ZONE_COND_CLOSED: | |
511 | __set_bit(nreported, zone_info->active_zones); | |
512 | nactive++; | |
513 | break; | |
514 | } | |
5b316468 NA |
515 | nreported++; |
516 | } | |
517 | sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len; | |
518 | } | |
519 | ||
520 | if (nreported != zone_info->nr_zones) { | |
521 | btrfs_err_in_rcu(device->fs_info, | |
522 | "inconsistent number of zones on %s (%u/%u)", | |
523 | rcu_str_deref(device->name), nreported, | |
524 | zone_info->nr_zones); | |
525 | ret = -EIO; | |
526 | goto out; | |
527 | } | |
528 | ||
ea6f8ddc NA |
529 | if (max_active_zones) { |
530 | if (nactive > max_active_zones) { | |
531 | btrfs_err_in_rcu(device->fs_info, | |
532 | "zoned: %u active zones on %s exceeds max_active_zones %u", | |
533 | nactive, rcu_str_deref(device->name), | |
534 | max_active_zones); | |
535 | ret = -EIO; | |
536 | goto out; | |
537 | } | |
538 | atomic_set(&zone_info->active_zones_left, | |
539 | max_active_zones - nactive); | |
540 | } | |
541 | ||
12659251 NA |
542 | /* Validate superblock log */ |
543 | nr_zones = BTRFS_NR_SB_LOG_ZONES; | |
544 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { | |
545 | u32 sb_zone; | |
546 | u64 sb_wp; | |
547 | int sb_pos = BTRFS_NR_SB_LOG_ZONES * i; | |
548 | ||
549 | sb_zone = sb_zone_number(zone_info->zone_size_shift, i); | |
550 | if (sb_zone + 1 >= zone_info->nr_zones) | |
551 | continue; | |
552 | ||
5b434df8 NA |
553 | ret = btrfs_get_dev_zones(device, |
554 | zone_start_physical(sb_zone, zone_info), | |
12659251 NA |
555 | &zone_info->sb_zones[sb_pos], |
556 | &nr_zones); | |
557 | if (ret) | |
558 | goto out; | |
559 | ||
560 | if (nr_zones != BTRFS_NR_SB_LOG_ZONES) { | |
561 | btrfs_err_in_rcu(device->fs_info, | |
562 | "zoned: failed to read super block log zone info at devid %llu zone %u", | |
563 | device->devid, sb_zone); | |
564 | ret = -EUCLEAN; | |
565 | goto out; | |
566 | } | |
567 | ||
568 | /* | |
1a9fd417 | 569 | * If zones[0] is conventional, always use the beginning of the |
12659251 NA |
570 | * zone to record superblock. No need to validate in that case. |
571 | */ | |
572 | if (zone_info->sb_zones[BTRFS_NR_SB_LOG_ZONES * i].type == | |
573 | BLK_ZONE_TYPE_CONVENTIONAL) | |
574 | continue; | |
575 | ||
576 | ret = sb_write_pointer(device->bdev, | |
577 | &zone_info->sb_zones[sb_pos], &sb_wp); | |
578 | if (ret != -ENOENT && ret) { | |
579 | btrfs_err_in_rcu(device->fs_info, | |
580 | "zoned: super block log zone corrupted devid %llu zone %u", | |
581 | device->devid, sb_zone); | |
582 | ret = -EUCLEAN; | |
583 | goto out; | |
584 | } | |
585 | } | |
586 | ||
587 | ||
5b316468 NA |
588 | kfree(zones); |
589 | ||
3c9daa09 JT |
590 | switch (bdev_zoned_model(bdev)) { |
591 | case BLK_ZONED_HM: | |
592 | model = "host-managed zoned"; | |
593 | emulated = ""; | |
594 | break; | |
595 | case BLK_ZONED_HA: | |
596 | model = "host-aware zoned"; | |
597 | emulated = ""; | |
598 | break; | |
599 | case BLK_ZONED_NONE: | |
600 | model = "regular"; | |
601 | emulated = "emulated "; | |
602 | break; | |
603 | default: | |
604 | /* Just in case */ | |
605 | btrfs_err_in_rcu(fs_info, "zoned: unsupported model %d on %s", | |
606 | bdev_zoned_model(bdev), | |
607 | rcu_str_deref(device->name)); | |
608 | ret = -EOPNOTSUPP; | |
609 | goto out_free_zone_info; | |
610 | } | |
611 | ||
612 | btrfs_info_in_rcu(fs_info, | |
613 | "%s block device %s, %u %szones of %llu bytes", | |
614 | model, rcu_str_deref(device->name), zone_info->nr_zones, | |
615 | emulated, zone_info->zone_size); | |
5b316468 NA |
616 | |
617 | return 0; | |
618 | ||
619 | out: | |
620 | kfree(zones); | |
3c9daa09 | 621 | out_free_zone_info: |
16beac87 | 622 | btrfs_destroy_dev_zone_info(device); |
5b316468 NA |
623 | |
624 | return ret; | |
625 | } | |
626 | ||
627 | void btrfs_destroy_dev_zone_info(struct btrfs_device *device) | |
628 | { | |
629 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
630 | ||
631 | if (!zone_info) | |
632 | return; | |
633 | ||
ea6f8ddc | 634 | bitmap_free(zone_info->active_zones); |
5b316468 NA |
635 | bitmap_free(zone_info->seq_zones); |
636 | bitmap_free(zone_info->empty_zones); | |
16beac87 | 637 | vfree(zone_info->zone_cache); |
5b316468 NA |
638 | kfree(zone_info); |
639 | device->zone_info = NULL; | |
640 | } | |
641 | ||
642 | int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, | |
643 | struct blk_zone *zone) | |
644 | { | |
645 | unsigned int nr_zones = 1; | |
646 | int ret; | |
647 | ||
648 | ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones); | |
649 | if (ret != 0 || !nr_zones) | |
650 | return ret ? ret : -EIO; | |
651 | ||
652 | return 0; | |
653 | } | |
b70f5097 NA |
654 | |
655 | int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) | |
656 | { | |
657 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
658 | struct btrfs_device *device; | |
659 | u64 zoned_devices = 0; | |
660 | u64 nr_devices = 0; | |
661 | u64 zone_size = 0; | |
c2ae7b77 | 662 | u64 max_zone_append_size = 0; |
3c9daa09 | 663 | const bool incompat_zoned = btrfs_fs_incompat(fs_info, ZONED); |
b70f5097 NA |
664 | int ret = 0; |
665 | ||
666 | /* Count zoned devices */ | |
667 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
668 | enum blk_zoned_model model; | |
669 | ||
670 | if (!device->bdev) | |
671 | continue; | |
672 | ||
673 | model = bdev_zoned_model(device->bdev); | |
3c9daa09 JT |
674 | /* |
675 | * A Host-Managed zoned device must be used as a zoned device. | |
676 | * A Host-Aware zoned device and a non-zoned devices can be | |
677 | * treated as a zoned device, if ZONED flag is enabled in the | |
678 | * superblock. | |
679 | */ | |
b70f5097 | 680 | if (model == BLK_ZONED_HM || |
3c9daa09 JT |
681 | (model == BLK_ZONED_HA && incompat_zoned) || |
682 | (model == BLK_ZONED_NONE && incompat_zoned)) { | |
f716fa47 | 683 | struct btrfs_zoned_device_info *zone_info; |
862931c7 NA |
684 | |
685 | zone_info = device->zone_info; | |
b70f5097 NA |
686 | zoned_devices++; |
687 | if (!zone_size) { | |
862931c7 NA |
688 | zone_size = zone_info->zone_size; |
689 | } else if (zone_info->zone_size != zone_size) { | |
b70f5097 NA |
690 | btrfs_err(fs_info, |
691 | "zoned: unequal block device zone sizes: have %llu found %llu", | |
692 | device->zone_info->zone_size, | |
693 | zone_size); | |
694 | ret = -EINVAL; | |
695 | goto out; | |
696 | } | |
c2ae7b77 NA |
697 | if (!max_zone_append_size || |
698 | (zone_info->max_zone_append_size && | |
699 | zone_info->max_zone_append_size < max_zone_append_size)) | |
700 | max_zone_append_size = | |
701 | zone_info->max_zone_append_size; | |
b70f5097 NA |
702 | } |
703 | nr_devices++; | |
704 | } | |
705 | ||
706 | if (!zoned_devices && !incompat_zoned) | |
707 | goto out; | |
708 | ||
709 | if (!zoned_devices && incompat_zoned) { | |
710 | /* No zoned block device found on ZONED filesystem */ | |
711 | btrfs_err(fs_info, | |
712 | "zoned: no zoned devices found on a zoned filesystem"); | |
713 | ret = -EINVAL; | |
714 | goto out; | |
715 | } | |
716 | ||
717 | if (zoned_devices && !incompat_zoned) { | |
718 | btrfs_err(fs_info, | |
719 | "zoned: mode not enabled but zoned device found"); | |
720 | ret = -EINVAL; | |
721 | goto out; | |
722 | } | |
723 | ||
724 | if (zoned_devices != nr_devices) { | |
725 | btrfs_err(fs_info, | |
726 | "zoned: cannot mix zoned and regular devices"); | |
727 | ret = -EINVAL; | |
728 | goto out; | |
729 | } | |
730 | ||
731 | /* | |
732 | * stripe_size is always aligned to BTRFS_STRIPE_LEN in | |
f6f39f7a | 733 | * btrfs_create_chunk(). Since we want stripe_len == zone_size, |
b70f5097 NA |
734 | * check the alignment here. |
735 | */ | |
736 | if (!IS_ALIGNED(zone_size, BTRFS_STRIPE_LEN)) { | |
737 | btrfs_err(fs_info, | |
738 | "zoned: zone size %llu not aligned to stripe %u", | |
739 | zone_size, BTRFS_STRIPE_LEN); | |
740 | ret = -EINVAL; | |
741 | goto out; | |
742 | } | |
743 | ||
a589dde0 NA |
744 | if (btrfs_fs_incompat(fs_info, MIXED_GROUPS)) { |
745 | btrfs_err(fs_info, "zoned: mixed block groups not supported"); | |
746 | ret = -EINVAL; | |
747 | goto out; | |
748 | } | |
749 | ||
b70f5097 | 750 | fs_info->zone_size = zone_size; |
f7b12a62 NA |
751 | fs_info->max_zone_append_size = ALIGN_DOWN(max_zone_append_size, |
752 | fs_info->sectorsize); | |
1cd6121f | 753 | fs_info->fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_ZONED; |
f7b12a62 NA |
754 | if (fs_info->max_zone_append_size < fs_info->max_extent_size) |
755 | fs_info->max_extent_size = fs_info->max_zone_append_size; | |
b70f5097 | 756 | |
b53429ba JT |
757 | /* |
758 | * Check mount options here, because we might change fs_info->zoned | |
759 | * from fs_info->zone_size. | |
760 | */ | |
761 | ret = btrfs_check_mountopts_zoned(fs_info); | |
762 | if (ret) | |
763 | goto out; | |
764 | ||
b70f5097 NA |
765 | btrfs_info(fs_info, "zoned mode enabled with zone size %llu", zone_size); |
766 | out: | |
767 | return ret; | |
768 | } | |
5d1ab66c NA |
769 | |
770 | int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) | |
771 | { | |
772 | if (!btrfs_is_zoned(info)) | |
773 | return 0; | |
774 | ||
775 | /* | |
776 | * Space cache writing is not COWed. Disable that to avoid write errors | |
777 | * in sequential zones. | |
778 | */ | |
779 | if (btrfs_test_opt(info, SPACE_CACHE)) { | |
780 | btrfs_err(info, "zoned: space cache v1 is not supported"); | |
781 | return -EINVAL; | |
782 | } | |
783 | ||
d206e9c9 NA |
784 | if (btrfs_test_opt(info, NODATACOW)) { |
785 | btrfs_err(info, "zoned: NODATACOW not supported"); | |
786 | return -EINVAL; | |
787 | } | |
788 | ||
5d1ab66c NA |
789 | return 0; |
790 | } | |
12659251 NA |
791 | |
792 | static int sb_log_location(struct block_device *bdev, struct blk_zone *zones, | |
793 | int rw, u64 *bytenr_ret) | |
794 | { | |
795 | u64 wp; | |
796 | int ret; | |
797 | ||
798 | if (zones[0].type == BLK_ZONE_TYPE_CONVENTIONAL) { | |
799 | *bytenr_ret = zones[0].start << SECTOR_SHIFT; | |
800 | return 0; | |
801 | } | |
802 | ||
803 | ret = sb_write_pointer(bdev, zones, &wp); | |
804 | if (ret != -ENOENT && ret < 0) | |
805 | return ret; | |
806 | ||
807 | if (rw == WRITE) { | |
808 | struct blk_zone *reset = NULL; | |
809 | ||
810 | if (wp == zones[0].start << SECTOR_SHIFT) | |
811 | reset = &zones[0]; | |
812 | else if (wp == zones[1].start << SECTOR_SHIFT) | |
813 | reset = &zones[1]; | |
814 | ||
815 | if (reset && reset->cond != BLK_ZONE_COND_EMPTY) { | |
5daaf552 | 816 | ASSERT(sb_zone_is_full(reset)); |
12659251 NA |
817 | |
818 | ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, | |
819 | reset->start, reset->len, | |
820 | GFP_NOFS); | |
821 | if (ret) | |
822 | return ret; | |
823 | ||
824 | reset->cond = BLK_ZONE_COND_EMPTY; | |
825 | reset->wp = reset->start; | |
826 | } | |
827 | } else if (ret != -ENOENT) { | |
9658b72e NA |
828 | /* |
829 | * For READ, we want the previous one. Move write pointer to | |
830 | * the end of a zone, if it is at the head of a zone. | |
831 | */ | |
832 | u64 zone_end = 0; | |
833 | ||
12659251 | 834 | if (wp == zones[0].start << SECTOR_SHIFT) |
9658b72e NA |
835 | zone_end = zones[1].start + zones[1].capacity; |
836 | else if (wp == zones[1].start << SECTOR_SHIFT) | |
837 | zone_end = zones[0].start + zones[0].capacity; | |
838 | if (zone_end) | |
839 | wp = ALIGN_DOWN(zone_end << SECTOR_SHIFT, | |
840 | BTRFS_SUPER_INFO_SIZE); | |
841 | ||
12659251 NA |
842 | wp -= BTRFS_SUPER_INFO_SIZE; |
843 | } | |
844 | ||
845 | *bytenr_ret = wp; | |
846 | return 0; | |
847 | ||
848 | } | |
849 | ||
850 | int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, | |
851 | u64 *bytenr_ret) | |
852 | { | |
853 | struct blk_zone zones[BTRFS_NR_SB_LOG_ZONES]; | |
d734492a | 854 | sector_t zone_sectors; |
12659251 NA |
855 | u32 sb_zone; |
856 | int ret; | |
12659251 NA |
857 | u8 zone_sectors_shift; |
858 | sector_t nr_sectors; | |
859 | u32 nr_zones; | |
860 | ||
861 | if (!bdev_is_zoned(bdev)) { | |
862 | *bytenr_ret = btrfs_sb_offset(mirror); | |
863 | return 0; | |
864 | } | |
865 | ||
866 | ASSERT(rw == READ || rw == WRITE); | |
867 | ||
868 | zone_sectors = bdev_zone_sectors(bdev); | |
869 | if (!is_power_of_2(zone_sectors)) | |
870 | return -EINVAL; | |
12659251 | 871 | zone_sectors_shift = ilog2(zone_sectors); |
ac7ac461 | 872 | nr_sectors = bdev_nr_sectors(bdev); |
12659251 NA |
873 | nr_zones = nr_sectors >> zone_sectors_shift; |
874 | ||
875 | sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); | |
876 | if (sb_zone + 1 >= nr_zones) | |
877 | return -ENOENT; | |
878 | ||
5b434df8 | 879 | ret = blkdev_report_zones(bdev, zone_start_sector(sb_zone, bdev), |
12659251 NA |
880 | BTRFS_NR_SB_LOG_ZONES, copy_zone_info_cb, |
881 | zones); | |
882 | if (ret < 0) | |
883 | return ret; | |
884 | if (ret != BTRFS_NR_SB_LOG_ZONES) | |
885 | return -EIO; | |
886 | ||
887 | return sb_log_location(bdev, zones, rw, bytenr_ret); | |
888 | } | |
889 | ||
890 | int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, | |
891 | u64 *bytenr_ret) | |
892 | { | |
893 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
894 | u32 zone_num; | |
895 | ||
d6639b35 NA |
896 | /* |
897 | * For a zoned filesystem on a non-zoned block device, use the same | |
898 | * super block locations as regular filesystem. Doing so, the super | |
899 | * block can always be retrieved and the zoned flag of the volume | |
900 | * detected from the super block information. | |
901 | */ | |
902 | if (!bdev_is_zoned(device->bdev)) { | |
12659251 NA |
903 | *bytenr_ret = btrfs_sb_offset(mirror); |
904 | return 0; | |
905 | } | |
906 | ||
907 | zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); | |
908 | if (zone_num + 1 >= zinfo->nr_zones) | |
909 | return -ENOENT; | |
910 | ||
911 | return sb_log_location(device->bdev, | |
912 | &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror], | |
913 | rw, bytenr_ret); | |
914 | } | |
915 | ||
916 | static inline bool is_sb_log_zone(struct btrfs_zoned_device_info *zinfo, | |
917 | int mirror) | |
918 | { | |
919 | u32 zone_num; | |
920 | ||
921 | if (!zinfo) | |
922 | return false; | |
923 | ||
924 | zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); | |
925 | if (zone_num + 1 >= zinfo->nr_zones) | |
926 | return false; | |
927 | ||
928 | if (!test_bit(zone_num, zinfo->seq_zones)) | |
929 | return false; | |
930 | ||
931 | return true; | |
932 | } | |
933 | ||
8376d9e1 | 934 | int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) |
12659251 NA |
935 | { |
936 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
937 | struct blk_zone *zone; | |
8376d9e1 | 938 | int i; |
12659251 NA |
939 | |
940 | if (!is_sb_log_zone(zinfo, mirror)) | |
8376d9e1 | 941 | return 0; |
12659251 NA |
942 | |
943 | zone = &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror]; | |
8376d9e1 NA |
944 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
945 | /* Advance the next zone */ | |
946 | if (zone->cond == BLK_ZONE_COND_FULL) { | |
947 | zone++; | |
948 | continue; | |
949 | } | |
950 | ||
12659251 NA |
951 | if (zone->cond == BLK_ZONE_COND_EMPTY) |
952 | zone->cond = BLK_ZONE_COND_IMP_OPEN; | |
953 | ||
8376d9e1 NA |
954 | zone->wp += SUPER_INFO_SECTORS; |
955 | ||
956 | if (sb_zone_is_full(zone)) { | |
957 | /* | |
958 | * No room left to write new superblock. Since | |
959 | * superblock is written with REQ_SYNC, it is safe to | |
960 | * finish the zone now. | |
961 | * | |
962 | * If the write pointer is exactly at the capacity, | |
963 | * explicit ZONE_FINISH is not necessary. | |
964 | */ | |
965 | if (zone->wp != zone->start + zone->capacity) { | |
966 | int ret; | |
967 | ||
968 | ret = blkdev_zone_mgmt(device->bdev, | |
969 | REQ_OP_ZONE_FINISH, zone->start, | |
970 | zone->len, GFP_NOFS); | |
971 | if (ret) | |
972 | return ret; | |
973 | } | |
12659251 | 974 | |
8376d9e1 | 975 | zone->wp = zone->start + zone->len; |
12659251 | 976 | zone->cond = BLK_ZONE_COND_FULL; |
8376d9e1 NA |
977 | } |
978 | return 0; | |
12659251 NA |
979 | } |
980 | ||
8376d9e1 NA |
981 | /* All the zones are FULL. Should not reach here. */ |
982 | ASSERT(0); | |
983 | return -EIO; | |
12659251 NA |
984 | } |
985 | ||
986 | int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) | |
987 | { | |
988 | sector_t zone_sectors; | |
989 | sector_t nr_sectors; | |
990 | u8 zone_sectors_shift; | |
991 | u32 sb_zone; | |
992 | u32 nr_zones; | |
993 | ||
994 | zone_sectors = bdev_zone_sectors(bdev); | |
995 | zone_sectors_shift = ilog2(zone_sectors); | |
ac7ac461 | 996 | nr_sectors = bdev_nr_sectors(bdev); |
12659251 NA |
997 | nr_zones = nr_sectors >> zone_sectors_shift; |
998 | ||
999 | sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); | |
1000 | if (sb_zone + 1 >= nr_zones) | |
1001 | return -ENOENT; | |
1002 | ||
1003 | return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, | |
5b434df8 | 1004 | zone_start_sector(sb_zone, bdev), |
12659251 NA |
1005 | zone_sectors * BTRFS_NR_SB_LOG_ZONES, GFP_NOFS); |
1006 | } | |
1cd6121f NA |
1007 | |
1008 | /** | |
1009 | * btrfs_find_allocatable_zones - find allocatable zones within a given region | |
1010 | * | |
1011 | * @device: the device to allocate a region on | |
1012 | * @hole_start: the position of the hole to allocate the region | |
1013 | * @num_bytes: size of wanted region | |
1014 | * @hole_end: the end of the hole | |
1015 | * @return: position of allocatable zones | |
1016 | * | |
1017 | * Allocatable region should not contain any superblock locations. | |
1018 | */ | |
1019 | u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, | |
1020 | u64 hole_end, u64 num_bytes) | |
1021 | { | |
1022 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
1023 | const u8 shift = zinfo->zone_size_shift; | |
1024 | u64 nzones = num_bytes >> shift; | |
1025 | u64 pos = hole_start; | |
1026 | u64 begin, end; | |
1027 | bool have_sb; | |
1028 | int i; | |
1029 | ||
1030 | ASSERT(IS_ALIGNED(hole_start, zinfo->zone_size)); | |
1031 | ASSERT(IS_ALIGNED(num_bytes, zinfo->zone_size)); | |
1032 | ||
1033 | while (pos < hole_end) { | |
1034 | begin = pos >> shift; | |
1035 | end = begin + nzones; | |
1036 | ||
1037 | if (end > zinfo->nr_zones) | |
1038 | return hole_end; | |
1039 | ||
1040 | /* Check if zones in the region are all empty */ | |
1041 | if (btrfs_dev_is_sequential(device, pos) && | |
1042 | find_next_zero_bit(zinfo->empty_zones, end, begin) != end) { | |
1043 | pos += zinfo->zone_size; | |
1044 | continue; | |
1045 | } | |
1046 | ||
1047 | have_sb = false; | |
1048 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { | |
1049 | u32 sb_zone; | |
1050 | u64 sb_pos; | |
1051 | ||
1052 | sb_zone = sb_zone_number(shift, i); | |
1053 | if (!(end <= sb_zone || | |
1054 | sb_zone + BTRFS_NR_SB_LOG_ZONES <= begin)) { | |
1055 | have_sb = true; | |
5b434df8 NA |
1056 | pos = zone_start_physical( |
1057 | sb_zone + BTRFS_NR_SB_LOG_ZONES, zinfo); | |
1cd6121f NA |
1058 | break; |
1059 | } | |
1060 | ||
1061 | /* We also need to exclude regular superblock positions */ | |
1062 | sb_pos = btrfs_sb_offset(i); | |
1063 | if (!(pos + num_bytes <= sb_pos || | |
1064 | sb_pos + BTRFS_SUPER_INFO_SIZE <= pos)) { | |
1065 | have_sb = true; | |
1066 | pos = ALIGN(sb_pos + BTRFS_SUPER_INFO_SIZE, | |
1067 | zinfo->zone_size); | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | if (!have_sb) | |
1072 | break; | |
1073 | } | |
1074 | ||
1075 | return pos; | |
1076 | } | |
1077 | ||
afba2bc0 NA |
1078 | static bool btrfs_dev_set_active_zone(struct btrfs_device *device, u64 pos) |
1079 | { | |
1080 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
1081 | unsigned int zno = (pos >> zone_info->zone_size_shift); | |
1082 | ||
1083 | /* We can use any number of zones */ | |
1084 | if (zone_info->max_active_zones == 0) | |
1085 | return true; | |
1086 | ||
1087 | if (!test_bit(zno, zone_info->active_zones)) { | |
1088 | /* Active zone left? */ | |
1089 | if (atomic_dec_if_positive(&zone_info->active_zones_left) < 0) | |
1090 | return false; | |
1091 | if (test_and_set_bit(zno, zone_info->active_zones)) { | |
1092 | /* Someone already set the bit */ | |
1093 | atomic_inc(&zone_info->active_zones_left); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return true; | |
1098 | } | |
1099 | ||
1100 | static void btrfs_dev_clear_active_zone(struct btrfs_device *device, u64 pos) | |
1101 | { | |
1102 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
1103 | unsigned int zno = (pos >> zone_info->zone_size_shift); | |
1104 | ||
1105 | /* We can use any number of zones */ | |
1106 | if (zone_info->max_active_zones == 0) | |
1107 | return; | |
1108 | ||
1109 | if (test_and_clear_bit(zno, zone_info->active_zones)) | |
1110 | atomic_inc(&zone_info->active_zones_left); | |
1111 | } | |
1112 | ||
1cd6121f NA |
1113 | int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, |
1114 | u64 length, u64 *bytes) | |
1115 | { | |
1116 | int ret; | |
1117 | ||
1118 | *bytes = 0; | |
1119 | ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_RESET, | |
1120 | physical >> SECTOR_SHIFT, length >> SECTOR_SHIFT, | |
1121 | GFP_NOFS); | |
1122 | if (ret) | |
1123 | return ret; | |
1124 | ||
1125 | *bytes = length; | |
1126 | while (length) { | |
1127 | btrfs_dev_set_zone_empty(device, physical); | |
afba2bc0 | 1128 | btrfs_dev_clear_active_zone(device, physical); |
1cd6121f NA |
1129 | physical += device->zone_info->zone_size; |
1130 | length -= device->zone_info->zone_size; | |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size) | |
1137 | { | |
1138 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
1139 | const u8 shift = zinfo->zone_size_shift; | |
1140 | unsigned long begin = start >> shift; | |
1141 | unsigned long end = (start + size) >> shift; | |
1142 | u64 pos; | |
1143 | int ret; | |
1144 | ||
1145 | ASSERT(IS_ALIGNED(start, zinfo->zone_size)); | |
1146 | ASSERT(IS_ALIGNED(size, zinfo->zone_size)); | |
1147 | ||
1148 | if (end > zinfo->nr_zones) | |
1149 | return -ERANGE; | |
1150 | ||
1151 | /* All the zones are conventional */ | |
1152 | if (find_next_bit(zinfo->seq_zones, begin, end) == end) | |
1153 | return 0; | |
1154 | ||
1155 | /* All the zones are sequential and empty */ | |
1156 | if (find_next_zero_bit(zinfo->seq_zones, begin, end) == end && | |
1157 | find_next_zero_bit(zinfo->empty_zones, begin, end) == end) | |
1158 | return 0; | |
1159 | ||
1160 | for (pos = start; pos < start + size; pos += zinfo->zone_size) { | |
1161 | u64 reset_bytes; | |
1162 | ||
1163 | if (!btrfs_dev_is_sequential(device, pos) || | |
1164 | btrfs_dev_is_empty_zone(device, pos)) | |
1165 | continue; | |
1166 | ||
1167 | /* Free regions should be empty */ | |
1168 | btrfs_warn_in_rcu( | |
1169 | device->fs_info, | |
1170 | "zoned: resetting device %s (devid %llu) zone %llu for allocation", | |
1171 | rcu_str_deref(device->name), device->devid, pos >> shift); | |
1172 | WARN_ON_ONCE(1); | |
1173 | ||
1174 | ret = btrfs_reset_device_zone(device, pos, zinfo->zone_size, | |
1175 | &reset_bytes); | |
1176 | if (ret) | |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | return 0; | |
1181 | } | |
08e11a3d | 1182 | |
a94794d5 NA |
1183 | /* |
1184 | * Calculate an allocation pointer from the extent allocation information | |
1185 | * for a block group consist of conventional zones. It is pointed to the | |
1186 | * end of the highest addressed extent in the block group as an allocation | |
1187 | * offset. | |
1188 | */ | |
1189 | static int calculate_alloc_pointer(struct btrfs_block_group *cache, | |
6ca64ac2 | 1190 | u64 *offset_ret, bool new) |
a94794d5 NA |
1191 | { |
1192 | struct btrfs_fs_info *fs_info = cache->fs_info; | |
29cbcf40 | 1193 | struct btrfs_root *root; |
a94794d5 NA |
1194 | struct btrfs_path *path; |
1195 | struct btrfs_key key; | |
1196 | struct btrfs_key found_key; | |
1197 | int ret; | |
1198 | u64 length; | |
1199 | ||
6ca64ac2 JT |
1200 | /* |
1201 | * Avoid tree lookups for a new block group, there's no use for it. | |
1202 | * It must always be 0. | |
1203 | * | |
1204 | * Also, we have a lock chain of extent buffer lock -> chunk mutex. | |
1205 | * For new a block group, this function is called from | |
1206 | * btrfs_make_block_group() which is already taking the chunk mutex. | |
1207 | * Thus, we cannot call calculate_alloc_pointer() which takes extent | |
1208 | * buffer locks to avoid deadlock. | |
1209 | */ | |
1210 | if (new) { | |
1211 | *offset_ret = 0; | |
1212 | return 0; | |
1213 | } | |
1214 | ||
a94794d5 NA |
1215 | path = btrfs_alloc_path(); |
1216 | if (!path) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | key.objectid = cache->start + cache->length; | |
1220 | key.type = 0; | |
1221 | key.offset = 0; | |
1222 | ||
29cbcf40 | 1223 | root = btrfs_extent_root(fs_info, key.objectid); |
a94794d5 NA |
1224 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
1225 | /* We should not find the exact match */ | |
1226 | if (!ret) | |
1227 | ret = -EUCLEAN; | |
1228 | if (ret < 0) | |
1229 | goto out; | |
1230 | ||
1231 | ret = btrfs_previous_extent_item(root, path, cache->start); | |
1232 | if (ret) { | |
1233 | if (ret == 1) { | |
1234 | ret = 0; | |
1235 | *offset_ret = 0; | |
1236 | } | |
1237 | goto out; | |
1238 | } | |
1239 | ||
1240 | btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]); | |
1241 | ||
1242 | if (found_key.type == BTRFS_EXTENT_ITEM_KEY) | |
1243 | length = found_key.offset; | |
1244 | else | |
1245 | length = fs_info->nodesize; | |
1246 | ||
1247 | if (!(found_key.objectid >= cache->start && | |
1248 | found_key.objectid + length <= cache->start + cache->length)) { | |
1249 | ret = -EUCLEAN; | |
1250 | goto out; | |
1251 | } | |
1252 | *offset_ret = found_key.objectid + length - cache->start; | |
1253 | ret = 0; | |
1254 | ||
1255 | out: | |
1256 | btrfs_free_path(path); | |
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new) | |
08e11a3d NA |
1261 | { |
1262 | struct btrfs_fs_info *fs_info = cache->fs_info; | |
1263 | struct extent_map_tree *em_tree = &fs_info->mapping_tree; | |
1264 | struct extent_map *em; | |
1265 | struct map_lookup *map; | |
1266 | struct btrfs_device *device; | |
1267 | u64 logical = cache->start; | |
1268 | u64 length = cache->length; | |
08e11a3d NA |
1269 | int ret; |
1270 | int i; | |
1271 | unsigned int nofs_flag; | |
1272 | u64 *alloc_offsets = NULL; | |
8eae532b | 1273 | u64 *caps = NULL; |
dbfcc18f | 1274 | u64 *physical = NULL; |
68a384b5 | 1275 | unsigned long *active = NULL; |
a94794d5 | 1276 | u64 last_alloc = 0; |
08e11a3d NA |
1277 | u32 num_sequential = 0, num_conventional = 0; |
1278 | ||
1279 | if (!btrfs_is_zoned(fs_info)) | |
1280 | return 0; | |
1281 | ||
1282 | /* Sanity check */ | |
1283 | if (!IS_ALIGNED(length, fs_info->zone_size)) { | |
1284 | btrfs_err(fs_info, | |
1285 | "zoned: block group %llu len %llu unaligned to zone size %llu", | |
1286 | logical, length, fs_info->zone_size); | |
1287 | return -EIO; | |
1288 | } | |
1289 | ||
1290 | /* Get the chunk mapping */ | |
1291 | read_lock(&em_tree->lock); | |
1292 | em = lookup_extent_mapping(em_tree, logical, length); | |
1293 | read_unlock(&em_tree->lock); | |
1294 | ||
1295 | if (!em) | |
1296 | return -EINVAL; | |
1297 | ||
1298 | map = em->map_lookup; | |
1299 | ||
64259baa | 1300 | cache->physical_map = kmemdup(map, map_lookup_size(map->num_stripes), GFP_NOFS); |
dafc340d NA |
1301 | if (!cache->physical_map) { |
1302 | ret = -ENOMEM; | |
1303 | goto out; | |
1304 | } | |
1305 | ||
08e11a3d NA |
1306 | alloc_offsets = kcalloc(map->num_stripes, sizeof(*alloc_offsets), GFP_NOFS); |
1307 | if (!alloc_offsets) { | |
dafc340d NA |
1308 | ret = -ENOMEM; |
1309 | goto out; | |
08e11a3d NA |
1310 | } |
1311 | ||
8eae532b NA |
1312 | caps = kcalloc(map->num_stripes, sizeof(*caps), GFP_NOFS); |
1313 | if (!caps) { | |
1314 | ret = -ENOMEM; | |
1315 | goto out; | |
1316 | } | |
1317 | ||
dbfcc18f JT |
1318 | physical = kcalloc(map->num_stripes, sizeof(*physical), GFP_NOFS); |
1319 | if (!physical) { | |
1320 | ret = -ENOMEM; | |
1321 | goto out; | |
1322 | } | |
1323 | ||
68a384b5 NA |
1324 | active = bitmap_zalloc(map->num_stripes, GFP_NOFS); |
1325 | if (!active) { | |
1326 | ret = -ENOMEM; | |
1327 | goto out; | |
1328 | } | |
1329 | ||
08e11a3d NA |
1330 | for (i = 0; i < map->num_stripes; i++) { |
1331 | bool is_sequential; | |
1332 | struct blk_zone zone; | |
6143c23c NA |
1333 | struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; |
1334 | int dev_replace_is_ongoing = 0; | |
08e11a3d NA |
1335 | |
1336 | device = map->stripes[i].dev; | |
dbfcc18f | 1337 | physical[i] = map->stripes[i].physical; |
08e11a3d NA |
1338 | |
1339 | if (device->bdev == NULL) { | |
1340 | alloc_offsets[i] = WP_MISSING_DEV; | |
1341 | continue; | |
1342 | } | |
1343 | ||
dbfcc18f | 1344 | is_sequential = btrfs_dev_is_sequential(device, physical[i]); |
08e11a3d NA |
1345 | if (is_sequential) |
1346 | num_sequential++; | |
1347 | else | |
1348 | num_conventional++; | |
1349 | ||
6ca64ac2 JT |
1350 | /* |
1351 | * Consider a zone as active if we can allow any number of | |
1352 | * active zones. | |
1353 | */ | |
1354 | if (!device->zone_info->max_active_zones) | |
1355 | __set_bit(i, active); | |
1356 | ||
08e11a3d NA |
1357 | if (!is_sequential) { |
1358 | alloc_offsets[i] = WP_CONVENTIONAL; | |
1359 | continue; | |
1360 | } | |
1361 | ||
1362 | /* | |
1363 | * This zone will be used for allocation, so mark this zone | |
1364 | * non-empty. | |
1365 | */ | |
dbfcc18f | 1366 | btrfs_dev_clear_zone_empty(device, physical[i]); |
08e11a3d | 1367 | |
6143c23c NA |
1368 | down_read(&dev_replace->rwsem); |
1369 | dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace); | |
1370 | if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL) | |
dbfcc18f | 1371 | btrfs_dev_clear_zone_empty(dev_replace->tgtdev, physical[i]); |
6143c23c NA |
1372 | up_read(&dev_replace->rwsem); |
1373 | ||
08e11a3d NA |
1374 | /* |
1375 | * The group is mapped to a sequential zone. Get the zone write | |
1376 | * pointer to determine the allocation offset within the zone. | |
1377 | */ | |
dbfcc18f | 1378 | WARN_ON(!IS_ALIGNED(physical[i], fs_info->zone_size)); |
08e11a3d | 1379 | nofs_flag = memalloc_nofs_save(); |
dbfcc18f | 1380 | ret = btrfs_get_dev_zone(device, physical[i], &zone); |
08e11a3d NA |
1381 | memalloc_nofs_restore(nofs_flag); |
1382 | if (ret == -EIO || ret == -EOPNOTSUPP) { | |
1383 | ret = 0; | |
1384 | alloc_offsets[i] = WP_MISSING_DEV; | |
1385 | continue; | |
1386 | } else if (ret) { | |
1387 | goto out; | |
1388 | } | |
1389 | ||
784daf2b | 1390 | if (zone.type == BLK_ZONE_TYPE_CONVENTIONAL) { |
47cdfb5e NA |
1391 | btrfs_err_in_rcu(fs_info, |
1392 | "zoned: unexpected conventional zone %llu on device %s (devid %llu)", | |
1393 | zone.start << SECTOR_SHIFT, | |
1394 | rcu_str_deref(device->name), device->devid); | |
784daf2b NA |
1395 | ret = -EIO; |
1396 | goto out; | |
1397 | } | |
1398 | ||
8eae532b NA |
1399 | caps[i] = (zone.capacity << SECTOR_SHIFT); |
1400 | ||
08e11a3d NA |
1401 | switch (zone.cond) { |
1402 | case BLK_ZONE_COND_OFFLINE: | |
1403 | case BLK_ZONE_COND_READONLY: | |
1404 | btrfs_err(fs_info, | |
1405 | "zoned: offline/readonly zone %llu on device %s (devid %llu)", | |
dbfcc18f | 1406 | physical[i] >> device->zone_info->zone_size_shift, |
08e11a3d NA |
1407 | rcu_str_deref(device->name), device->devid); |
1408 | alloc_offsets[i] = WP_MISSING_DEV; | |
1409 | break; | |
1410 | case BLK_ZONE_COND_EMPTY: | |
1411 | alloc_offsets[i] = 0; | |
1412 | break; | |
1413 | case BLK_ZONE_COND_FULL: | |
8eae532b | 1414 | alloc_offsets[i] = caps[i]; |
08e11a3d NA |
1415 | break; |
1416 | default: | |
1417 | /* Partially used zone */ | |
1418 | alloc_offsets[i] = | |
1419 | ((zone.wp - zone.start) << SECTOR_SHIFT); | |
68a384b5 | 1420 | __set_bit(i, active); |
08e11a3d NA |
1421 | break; |
1422 | } | |
1423 | } | |
1424 | ||
08f45559 JT |
1425 | if (num_sequential > 0) |
1426 | cache->seq_zone = true; | |
1427 | ||
08e11a3d | 1428 | if (num_conventional > 0) { |
8eae532b NA |
1429 | /* Zone capacity is always zone size in emulation */ |
1430 | cache->zone_capacity = cache->length; | |
6ca64ac2 JT |
1431 | ret = calculate_alloc_pointer(cache, &last_alloc, new); |
1432 | if (ret) { | |
1433 | btrfs_err(fs_info, | |
a94794d5 | 1434 | "zoned: failed to determine allocation offset of bg %llu", |
6ca64ac2 JT |
1435 | cache->start); |
1436 | goto out; | |
1437 | } else if (map->num_stripes == num_conventional) { | |
1438 | cache->alloc_offset = last_alloc; | |
3349b57f | 1439 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags); |
a94794d5 NA |
1440 | goto out; |
1441 | } | |
08e11a3d NA |
1442 | } |
1443 | ||
1444 | switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) { | |
1445 | case 0: /* single */ | |
06e1e7f4 JT |
1446 | if (alloc_offsets[0] == WP_MISSING_DEV) { |
1447 | btrfs_err(fs_info, | |
1448 | "zoned: cannot recover write pointer for zone %llu", | |
dbfcc18f | 1449 | physical[0]); |
06e1e7f4 JT |
1450 | ret = -EIO; |
1451 | goto out; | |
1452 | } | |
08e11a3d | 1453 | cache->alloc_offset = alloc_offsets[0]; |
8eae532b | 1454 | cache->zone_capacity = caps[0]; |
3349b57f JB |
1455 | if (test_bit(0, active)) |
1456 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags); | |
08e11a3d NA |
1457 | break; |
1458 | case BTRFS_BLOCK_GROUP_DUP: | |
265f7237 JT |
1459 | if (map->type & BTRFS_BLOCK_GROUP_DATA) { |
1460 | btrfs_err(fs_info, "zoned: profile DUP not yet supported on data bg"); | |
1461 | ret = -EINVAL; | |
1462 | goto out; | |
1463 | } | |
1464 | if (alloc_offsets[0] == WP_MISSING_DEV) { | |
1465 | btrfs_err(fs_info, | |
1466 | "zoned: cannot recover write pointer for zone %llu", | |
1467 | physical[0]); | |
1468 | ret = -EIO; | |
1469 | goto out; | |
1470 | } | |
1471 | if (alloc_offsets[1] == WP_MISSING_DEV) { | |
1472 | btrfs_err(fs_info, | |
1473 | "zoned: cannot recover write pointer for zone %llu", | |
1474 | physical[1]); | |
1475 | ret = -EIO; | |
1476 | goto out; | |
1477 | } | |
1478 | if (alloc_offsets[0] != alloc_offsets[1]) { | |
1479 | btrfs_err(fs_info, | |
1480 | "zoned: write pointer offset mismatch of zones in DUP profile"); | |
1481 | ret = -EIO; | |
1482 | goto out; | |
1483 | } | |
1484 | if (test_bit(0, active) != test_bit(1, active)) { | |
1485 | if (!btrfs_zone_activate(cache)) { | |
1486 | ret = -EIO; | |
1487 | goto out; | |
1488 | } | |
1489 | } else { | |
3349b57f JB |
1490 | if (test_bit(0, active)) |
1491 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, | |
1492 | &cache->runtime_flags); | |
265f7237 JT |
1493 | } |
1494 | cache->alloc_offset = alloc_offsets[0]; | |
1495 | cache->zone_capacity = min(caps[0], caps[1]); | |
1496 | break; | |
08e11a3d NA |
1497 | case BTRFS_BLOCK_GROUP_RAID1: |
1498 | case BTRFS_BLOCK_GROUP_RAID0: | |
1499 | case BTRFS_BLOCK_GROUP_RAID10: | |
1500 | case BTRFS_BLOCK_GROUP_RAID5: | |
1501 | case BTRFS_BLOCK_GROUP_RAID6: | |
1502 | /* non-single profiles are not supported yet */ | |
1503 | default: | |
1504 | btrfs_err(fs_info, "zoned: profile %s not yet supported", | |
1505 | btrfs_bg_type_to_raid_name(map->type)); | |
1506 | ret = -EINVAL; | |
1507 | goto out; | |
1508 | } | |
1509 | ||
1510 | out: | |
06e1e7f4 JT |
1511 | if (cache->alloc_offset > fs_info->zone_size) { |
1512 | btrfs_err(fs_info, | |
1513 | "zoned: invalid write pointer %llu in block group %llu", | |
1514 | cache->alloc_offset, cache->start); | |
1515 | ret = -EIO; | |
1516 | } | |
1517 | ||
8eae532b NA |
1518 | if (cache->alloc_offset > cache->zone_capacity) { |
1519 | btrfs_err(fs_info, | |
1520 | "zoned: invalid write pointer %llu (larger than zone capacity %llu) in block group %llu", | |
1521 | cache->alloc_offset, cache->zone_capacity, | |
1522 | cache->start); | |
1523 | ret = -EIO; | |
1524 | } | |
1525 | ||
a94794d5 NA |
1526 | /* An extent is allocated after the write pointer */ |
1527 | if (!ret && num_conventional && last_alloc > cache->alloc_offset) { | |
1528 | btrfs_err(fs_info, | |
1529 | "zoned: got wrong write pointer in BG %llu: %llu > %llu", | |
1530 | logical, last_alloc, cache->alloc_offset); | |
1531 | ret = -EIO; | |
1532 | } | |
1533 | ||
6ca64ac2 | 1534 | if (!ret) { |
0bc09ca1 | 1535 | cache->meta_write_pointer = cache->alloc_offset + cache->start; |
3349b57f | 1536 | if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags)) { |
6ca64ac2 JT |
1537 | btrfs_get_block_group(cache); |
1538 | spin_lock(&fs_info->zone_active_bgs_lock); | |
1539 | list_add_tail(&cache->active_bg_list, | |
1540 | &fs_info->zone_active_bgs); | |
1541 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
1542 | } | |
1543 | } else { | |
dafc340d NA |
1544 | kfree(cache->physical_map); |
1545 | cache->physical_map = NULL; | |
1546 | } | |
68a384b5 | 1547 | bitmap_free(active); |
dbfcc18f | 1548 | kfree(physical); |
8eae532b | 1549 | kfree(caps); |
08e11a3d NA |
1550 | kfree(alloc_offsets); |
1551 | free_extent_map(em); | |
1552 | ||
1553 | return ret; | |
1554 | } | |
169e0da9 NA |
1555 | |
1556 | void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) | |
1557 | { | |
1558 | u64 unusable, free; | |
1559 | ||
1560 | if (!btrfs_is_zoned(cache->fs_info)) | |
1561 | return; | |
1562 | ||
1563 | WARN_ON(cache->bytes_super != 0); | |
98173255 NA |
1564 | unusable = (cache->alloc_offset - cache->used) + |
1565 | (cache->length - cache->zone_capacity); | |
1566 | free = cache->zone_capacity - cache->alloc_offset; | |
169e0da9 NA |
1567 | |
1568 | /* We only need ->free_space in ALLOC_SEQ block groups */ | |
169e0da9 NA |
1569 | cache->cached = BTRFS_CACHE_FINISHED; |
1570 | cache->free_space_ctl->free_space = free; | |
1571 | cache->zone_unusable = unusable; | |
169e0da9 | 1572 | } |
d3575156 NA |
1573 | |
1574 | void btrfs_redirty_list_add(struct btrfs_transaction *trans, | |
1575 | struct extent_buffer *eb) | |
1576 | { | |
1577 | struct btrfs_fs_info *fs_info = eb->fs_info; | |
1578 | ||
1579 | if (!btrfs_is_zoned(fs_info) || | |
1580 | btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN) || | |
1581 | !list_empty(&eb->release_list)) | |
1582 | return; | |
1583 | ||
1584 | set_extent_buffer_dirty(eb); | |
1585 | set_extent_bits_nowait(&trans->dirty_pages, eb->start, | |
1586 | eb->start + eb->len - 1, EXTENT_DIRTY); | |
1587 | memzero_extent_buffer(eb, 0, eb->len); | |
1588 | set_bit(EXTENT_BUFFER_NO_CHECK, &eb->bflags); | |
1589 | ||
1590 | spin_lock(&trans->releasing_ebs_lock); | |
1591 | list_add_tail(&eb->release_list, &trans->releasing_ebs); | |
1592 | spin_unlock(&trans->releasing_ebs_lock); | |
1593 | atomic_inc(&eb->refs); | |
1594 | } | |
1595 | ||
1596 | void btrfs_free_redirty_list(struct btrfs_transaction *trans) | |
1597 | { | |
1598 | spin_lock(&trans->releasing_ebs_lock); | |
1599 | while (!list_empty(&trans->releasing_ebs)) { | |
1600 | struct extent_buffer *eb; | |
1601 | ||
1602 | eb = list_first_entry(&trans->releasing_ebs, | |
1603 | struct extent_buffer, release_list); | |
1604 | list_del_init(&eb->release_list); | |
1605 | free_extent_buffer(eb); | |
1606 | } | |
1607 | spin_unlock(&trans->releasing_ebs_lock); | |
1608 | } | |
08f45559 | 1609 | |
e380adfc | 1610 | bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) |
08f45559 JT |
1611 | { |
1612 | struct btrfs_fs_info *fs_info = inode->root->fs_info; | |
1613 | struct btrfs_block_group *cache; | |
1614 | bool ret = false; | |
1615 | ||
1616 | if (!btrfs_is_zoned(fs_info)) | |
1617 | return false; | |
1618 | ||
08f45559 JT |
1619 | if (!is_data_inode(&inode->vfs_inode)) |
1620 | return false; | |
1621 | ||
e6d261e3 JT |
1622 | /* |
1623 | * Using REQ_OP_ZONE_APPNED for relocation can break assumptions on the | |
1624 | * extent layout the relocation code has. | |
1625 | * Furthermore we have set aside own block-group from which only the | |
1626 | * relocation "process" can allocate and make sure only one process at a | |
1627 | * time can add pages to an extent that gets relocated, so it's safe to | |
1628 | * use regular REQ_OP_WRITE for this special case. | |
1629 | */ | |
1630 | if (btrfs_is_data_reloc_root(inode->root)) | |
1631 | return false; | |
1632 | ||
e380adfc | 1633 | cache = btrfs_lookup_block_group(fs_info, start); |
08f45559 JT |
1634 | ASSERT(cache); |
1635 | if (!cache) | |
1636 | return false; | |
1637 | ||
1638 | ret = cache->seq_zone; | |
1639 | btrfs_put_block_group(cache); | |
1640 | ||
1641 | return ret; | |
1642 | } | |
d8e3fb10 NA |
1643 | |
1644 | void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, | |
1645 | struct bio *bio) | |
1646 | { | |
1647 | struct btrfs_ordered_extent *ordered; | |
1648 | const u64 physical = bio->bi_iter.bi_sector << SECTOR_SHIFT; | |
1649 | ||
1650 | if (bio_op(bio) != REQ_OP_ZONE_APPEND) | |
1651 | return; | |
1652 | ||
1653 | ordered = btrfs_lookup_ordered_extent(BTRFS_I(inode), file_offset); | |
1654 | if (WARN_ON(!ordered)) | |
1655 | return; | |
1656 | ||
1657 | ordered->physical = physical; | |
c7c3a6dc | 1658 | ordered->bdev = bio->bi_bdev; |
d8e3fb10 NA |
1659 | |
1660 | btrfs_put_ordered_extent(ordered); | |
1661 | } | |
1662 | ||
1663 | void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered) | |
1664 | { | |
1665 | struct btrfs_inode *inode = BTRFS_I(ordered->inode); | |
1666 | struct btrfs_fs_info *fs_info = inode->root->fs_info; | |
1667 | struct extent_map_tree *em_tree; | |
1668 | struct extent_map *em; | |
1669 | struct btrfs_ordered_sum *sum; | |
d8e3fb10 NA |
1670 | u64 orig_logical = ordered->disk_bytenr; |
1671 | u64 *logical = NULL; | |
1672 | int nr, stripe_len; | |
1673 | ||
1674 | /* Zoned devices should not have partitions. So, we can assume it is 0 */ | |
c7c3a6dc CH |
1675 | ASSERT(!bdev_is_partition(ordered->bdev)); |
1676 | if (WARN_ON(!ordered->bdev)) | |
d8e3fb10 NA |
1677 | return; |
1678 | ||
c7c3a6dc | 1679 | if (WARN_ON(btrfs_rmap_block(fs_info, orig_logical, ordered->bdev, |
d8e3fb10 NA |
1680 | ordered->physical, &logical, &nr, |
1681 | &stripe_len))) | |
1682 | goto out; | |
1683 | ||
1684 | WARN_ON(nr != 1); | |
1685 | ||
1686 | if (orig_logical == *logical) | |
1687 | goto out; | |
1688 | ||
1689 | ordered->disk_bytenr = *logical; | |
1690 | ||
1691 | em_tree = &inode->extent_tree; | |
1692 | write_lock(&em_tree->lock); | |
1693 | em = search_extent_mapping(em_tree, ordered->file_offset, | |
1694 | ordered->num_bytes); | |
1695 | em->block_start = *logical; | |
1696 | free_extent_map(em); | |
1697 | write_unlock(&em_tree->lock); | |
1698 | ||
1699 | list_for_each_entry(sum, &ordered->list, list) { | |
1700 | if (*logical < orig_logical) | |
1701 | sum->bytenr -= orig_logical - *logical; | |
1702 | else | |
1703 | sum->bytenr += *logical - orig_logical; | |
1704 | } | |
1705 | ||
1706 | out: | |
1707 | kfree(logical); | |
d8e3fb10 | 1708 | } |
0bc09ca1 NA |
1709 | |
1710 | bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, | |
1711 | struct extent_buffer *eb, | |
1712 | struct btrfs_block_group **cache_ret) | |
1713 | { | |
1714 | struct btrfs_block_group *cache; | |
1715 | bool ret = true; | |
1716 | ||
1717 | if (!btrfs_is_zoned(fs_info)) | |
1718 | return true; | |
1719 | ||
8fdf54fe JT |
1720 | cache = btrfs_lookup_block_group(fs_info, eb->start); |
1721 | if (!cache) | |
1722 | return true; | |
0bc09ca1 | 1723 | |
8fdf54fe | 1724 | if (cache->meta_write_pointer != eb->start) { |
0bc09ca1 NA |
1725 | btrfs_put_block_group(cache); |
1726 | cache = NULL; | |
8fdf54fe JT |
1727 | ret = false; |
1728 | } else { | |
1729 | cache->meta_write_pointer = eb->start + eb->len; | |
0bc09ca1 NA |
1730 | } |
1731 | ||
8fdf54fe | 1732 | *cache_ret = cache; |
0bc09ca1 NA |
1733 | |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, | |
1738 | struct extent_buffer *eb) | |
1739 | { | |
1740 | if (!btrfs_is_zoned(eb->fs_info) || !cache) | |
1741 | return; | |
1742 | ||
1743 | ASSERT(cache->meta_write_pointer == eb->start + eb->len); | |
1744 | cache->meta_write_pointer = eb->start; | |
1745 | } | |
de17addc NA |
1746 | |
1747 | int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length) | |
1748 | { | |
1749 | if (!btrfs_dev_is_sequential(device, physical)) | |
1750 | return -EOPNOTSUPP; | |
1751 | ||
1752 | return blkdev_issue_zeroout(device->bdev, physical >> SECTOR_SHIFT, | |
1753 | length >> SECTOR_SHIFT, GFP_NOFS, 0); | |
1754 | } | |
7db1c5d1 NA |
1755 | |
1756 | static int read_zone_info(struct btrfs_fs_info *fs_info, u64 logical, | |
1757 | struct blk_zone *zone) | |
1758 | { | |
4c664611 | 1759 | struct btrfs_io_context *bioc = NULL; |
7db1c5d1 NA |
1760 | u64 mapped_length = PAGE_SIZE; |
1761 | unsigned int nofs_flag; | |
1762 | int nmirrors; | |
1763 | int i, ret; | |
1764 | ||
1765 | ret = btrfs_map_sblock(fs_info, BTRFS_MAP_GET_READ_MIRRORS, logical, | |
4c664611 QW |
1766 | &mapped_length, &bioc); |
1767 | if (ret || !bioc || mapped_length < PAGE_SIZE) { | |
29634578 CH |
1768 | ret = -EIO; |
1769 | goto out_put_bioc; | |
7db1c5d1 NA |
1770 | } |
1771 | ||
29634578 CH |
1772 | if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) { |
1773 | ret = -EINVAL; | |
1774 | goto out_put_bioc; | |
1775 | } | |
7db1c5d1 NA |
1776 | |
1777 | nofs_flag = memalloc_nofs_save(); | |
4c664611 | 1778 | nmirrors = (int)bioc->num_stripes; |
7db1c5d1 | 1779 | for (i = 0; i < nmirrors; i++) { |
4c664611 QW |
1780 | u64 physical = bioc->stripes[i].physical; |
1781 | struct btrfs_device *dev = bioc->stripes[i].dev; | |
7db1c5d1 NA |
1782 | |
1783 | /* Missing device */ | |
1784 | if (!dev->bdev) | |
1785 | continue; | |
1786 | ||
1787 | ret = btrfs_get_dev_zone(dev, physical, zone); | |
1788 | /* Failing device */ | |
1789 | if (ret == -EIO || ret == -EOPNOTSUPP) | |
1790 | continue; | |
1791 | break; | |
1792 | } | |
1793 | memalloc_nofs_restore(nofs_flag); | |
29634578 CH |
1794 | out_put_bioc: |
1795 | btrfs_put_bioc(bioc); | |
7db1c5d1 NA |
1796 | return ret; |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Synchronize write pointer in a zone at @physical_start on @tgt_dev, by | |
1801 | * filling zeros between @physical_pos to a write pointer of dev-replace | |
1802 | * source device. | |
1803 | */ | |
1804 | int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, | |
1805 | u64 physical_start, u64 physical_pos) | |
1806 | { | |
1807 | struct btrfs_fs_info *fs_info = tgt_dev->fs_info; | |
1808 | struct blk_zone zone; | |
1809 | u64 length; | |
1810 | u64 wp; | |
1811 | int ret; | |
1812 | ||
1813 | if (!btrfs_dev_is_sequential(tgt_dev, physical_pos)) | |
1814 | return 0; | |
1815 | ||
1816 | ret = read_zone_info(fs_info, logical, &zone); | |
1817 | if (ret) | |
1818 | return ret; | |
1819 | ||
1820 | wp = physical_start + ((zone.wp - zone.start) << SECTOR_SHIFT); | |
1821 | ||
1822 | if (physical_pos == wp) | |
1823 | return 0; | |
1824 | ||
1825 | if (physical_pos > wp) | |
1826 | return -EUCLEAN; | |
1827 | ||
1828 | length = wp - physical_pos; | |
1829 | return btrfs_zoned_issue_zeroout(tgt_dev, physical_pos, length); | |
1830 | } | |
e7ff9e6b JT |
1831 | |
1832 | struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, | |
1833 | u64 logical, u64 length) | |
1834 | { | |
1835 | struct btrfs_device *device; | |
1836 | struct extent_map *em; | |
1837 | struct map_lookup *map; | |
1838 | ||
1839 | em = btrfs_get_chunk_map(fs_info, logical, length); | |
1840 | if (IS_ERR(em)) | |
1841 | return ERR_CAST(em); | |
1842 | ||
1843 | map = em->map_lookup; | |
1844 | /* We only support single profile for now */ | |
e7ff9e6b JT |
1845 | device = map->stripes[0].dev; |
1846 | ||
1847 | free_extent_map(em); | |
1848 | ||
1849 | return device; | |
1850 | } | |
afba2bc0 NA |
1851 | |
1852 | /** | |
1853 | * Activate block group and underlying device zones | |
1854 | * | |
1855 | * @block_group: the block group to activate | |
1856 | * | |
1857 | * Return: true on success, false otherwise | |
1858 | */ | |
1859 | bool btrfs_zone_activate(struct btrfs_block_group *block_group) | |
1860 | { | |
1861 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
6a921de5 | 1862 | struct btrfs_space_info *space_info = block_group->space_info; |
afba2bc0 NA |
1863 | struct map_lookup *map; |
1864 | struct btrfs_device *device; | |
1865 | u64 physical; | |
1866 | bool ret; | |
f9a912a3 | 1867 | int i; |
afba2bc0 NA |
1868 | |
1869 | if (!btrfs_is_zoned(block_group->fs_info)) | |
1870 | return true; | |
1871 | ||
1872 | map = block_group->physical_map; | |
afba2bc0 | 1873 | |
6a921de5 | 1874 | spin_lock(&space_info->lock); |
afba2bc0 | 1875 | spin_lock(&block_group->lock); |
3349b57f | 1876 | if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) { |
afba2bc0 NA |
1877 | ret = true; |
1878 | goto out_unlock; | |
1879 | } | |
1880 | ||
54957712 | 1881 | /* No space left */ |
1bfd4767 | 1882 | if (btrfs_zoned_bg_is_full(block_group)) { |
54957712 NA |
1883 | ret = false; |
1884 | goto out_unlock; | |
1885 | } | |
1886 | ||
f9a912a3 JT |
1887 | for (i = 0; i < map->num_stripes; i++) { |
1888 | device = map->stripes[i].dev; | |
1889 | physical = map->stripes[i].physical; | |
afba2bc0 | 1890 | |
f9a912a3 JT |
1891 | if (device->zone_info->max_active_zones == 0) |
1892 | continue; | |
1893 | ||
f9a912a3 JT |
1894 | if (!btrfs_dev_set_active_zone(device, physical)) { |
1895 | /* Cannot activate the zone */ | |
1896 | ret = false; | |
1897 | goto out_unlock; | |
1898 | } | |
f9a912a3 | 1899 | } |
ceb4f608 NA |
1900 | |
1901 | /* Successfully activated all the zones */ | |
3349b57f | 1902 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags); |
6a921de5 | 1903 | space_info->active_total_bytes += block_group->length; |
afba2bc0 | 1904 | spin_unlock(&block_group->lock); |
6a921de5 NA |
1905 | btrfs_try_granting_tickets(fs_info, space_info); |
1906 | spin_unlock(&space_info->lock); | |
afba2bc0 | 1907 | |
ceb4f608 NA |
1908 | /* For the active block group list */ |
1909 | btrfs_get_block_group(block_group); | |
afba2bc0 | 1910 | |
ceb4f608 NA |
1911 | spin_lock(&fs_info->zone_active_bgs_lock); |
1912 | list_add_tail(&block_group->active_bg_list, &fs_info->zone_active_bgs); | |
1913 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
afba2bc0 NA |
1914 | |
1915 | return true; | |
1916 | ||
1917 | out_unlock: | |
1918 | spin_unlock(&block_group->lock); | |
6a921de5 | 1919 | spin_unlock(&space_info->lock); |
afba2bc0 NA |
1920 | return ret; |
1921 | } | |
1922 | ||
2dd7e7bc NA |
1923 | static void wait_eb_writebacks(struct btrfs_block_group *block_group) |
1924 | { | |
1925 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
1926 | const u64 end = block_group->start + block_group->length; | |
1927 | struct radix_tree_iter iter; | |
1928 | struct extent_buffer *eb; | |
1929 | void __rcu **slot; | |
1930 | ||
1931 | rcu_read_lock(); | |
1932 | radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, | |
1933 | block_group->start >> fs_info->sectorsize_bits) { | |
1934 | eb = radix_tree_deref_slot(slot); | |
1935 | if (!eb) | |
1936 | continue; | |
1937 | if (radix_tree_deref_retry(eb)) { | |
1938 | slot = radix_tree_iter_retry(&iter); | |
1939 | continue; | |
1940 | } | |
1941 | ||
1942 | if (eb->start < block_group->start) | |
1943 | continue; | |
1944 | if (eb->start >= end) | |
1945 | break; | |
1946 | ||
1947 | slot = radix_tree_iter_resume(slot, &iter); | |
1948 | rcu_read_unlock(); | |
1949 | wait_on_extent_buffer_writeback(eb); | |
1950 | rcu_read_lock(); | |
1951 | } | |
1952 | rcu_read_unlock(); | |
1953 | } | |
1954 | ||
d70cbdda | 1955 | static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_written) |
afba2bc0 NA |
1956 | { |
1957 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
1958 | struct map_lookup *map; | |
2dd7e7bc NA |
1959 | const bool is_metadata = (block_group->flags & |
1960 | (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM)); | |
afba2bc0 | 1961 | int ret = 0; |
4dcbb8ab | 1962 | int i; |
afba2bc0 | 1963 | |
afba2bc0 | 1964 | spin_lock(&block_group->lock); |
3349b57f | 1965 | if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) { |
afba2bc0 NA |
1966 | spin_unlock(&block_group->lock); |
1967 | return 0; | |
1968 | } | |
1969 | ||
1970 | /* Check if we have unwritten allocated space */ | |
2dd7e7bc | 1971 | if (is_metadata && |
aa9ffadf | 1972 | block_group->start + block_group->alloc_offset > block_group->meta_write_pointer) { |
afba2bc0 NA |
1973 | spin_unlock(&block_group->lock); |
1974 | return -EAGAIN; | |
1975 | } | |
afba2bc0 NA |
1976 | |
1977 | /* | |
d70cbdda NA |
1978 | * If we are sure that the block group is full (= no more room left for |
1979 | * new allocation) and the IO for the last usable block is completed, we | |
1980 | * don't need to wait for the other IOs. This holds because we ensure | |
1981 | * the sequential IO submissions using the ZONE_APPEND command for data | |
1982 | * and block_group->meta_write_pointer for metadata. | |
afba2bc0 | 1983 | */ |
d70cbdda | 1984 | if (!fully_written) { |
afba2bc0 | 1985 | spin_unlock(&block_group->lock); |
afba2bc0 | 1986 | |
d70cbdda NA |
1987 | ret = btrfs_inc_block_group_ro(block_group, false); |
1988 | if (ret) | |
1989 | return ret; | |
1990 | ||
1991 | /* Ensure all writes in this block group finish */ | |
1992 | btrfs_wait_block_group_reservations(block_group); | |
1993 | /* No need to wait for NOCOW writers. Zoned mode does not allow that */ | |
1994 | btrfs_wait_ordered_roots(fs_info, U64_MAX, block_group->start, | |
1995 | block_group->length); | |
2dd7e7bc NA |
1996 | /* Wait for extent buffers to be written. */ |
1997 | if (is_metadata) | |
1998 | wait_eb_writebacks(block_group); | |
d70cbdda NA |
1999 | |
2000 | spin_lock(&block_group->lock); | |
2001 | ||
2002 | /* | |
2003 | * Bail out if someone already deactivated the block group, or | |
2004 | * allocated space is left in the block group. | |
2005 | */ | |
3349b57f JB |
2006 | if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, |
2007 | &block_group->runtime_flags)) { | |
d70cbdda NA |
2008 | spin_unlock(&block_group->lock); |
2009 | btrfs_dec_block_group_ro(block_group); | |
2010 | return 0; | |
2011 | } | |
2012 | ||
2013 | if (block_group->reserved) { | |
2014 | spin_unlock(&block_group->lock); | |
2015 | btrfs_dec_block_group_ro(block_group); | |
2016 | return -EAGAIN; | |
2017 | } | |
afba2bc0 NA |
2018 | } |
2019 | ||
3349b57f | 2020 | clear_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags); |
afba2bc0 NA |
2021 | block_group->alloc_offset = block_group->zone_capacity; |
2022 | block_group->free_space_ctl->free_space = 0; | |
2023 | btrfs_clear_treelog_bg(block_group); | |
5911f538 | 2024 | btrfs_clear_data_reloc_bg(block_group); |
afba2bc0 NA |
2025 | spin_unlock(&block_group->lock); |
2026 | ||
d70cbdda | 2027 | map = block_group->physical_map; |
4dcbb8ab | 2028 | for (i = 0; i < map->num_stripes; i++) { |
d70cbdda NA |
2029 | struct btrfs_device *device = map->stripes[i].dev; |
2030 | const u64 physical = map->stripes[i].physical; | |
afba2bc0 | 2031 | |
4dcbb8ab JT |
2032 | if (device->zone_info->max_active_zones == 0) |
2033 | continue; | |
afba2bc0 | 2034 | |
b3a3b025 NA |
2035 | ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH, |
2036 | physical >> SECTOR_SHIFT, | |
2037 | device->zone_info->zone_size >> SECTOR_SHIFT, | |
2038 | GFP_NOFS); | |
4dcbb8ab | 2039 | |
b3a3b025 NA |
2040 | if (ret) |
2041 | return ret; | |
afba2bc0 | 2042 | |
4dcbb8ab | 2043 | btrfs_dev_clear_active_zone(device, physical); |
afba2bc0 | 2044 | } |
d70cbdda NA |
2045 | |
2046 | if (!fully_written) | |
2047 | btrfs_dec_block_group_ro(block_group); | |
afba2bc0 | 2048 | |
4dcbb8ab JT |
2049 | spin_lock(&fs_info->zone_active_bgs_lock); |
2050 | ASSERT(!list_empty(&block_group->active_bg_list)); | |
2051 | list_del_init(&block_group->active_bg_list); | |
2052 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2053 | ||
2054 | /* For active_bg_list */ | |
2055 | btrfs_put_block_group(block_group); | |
2056 | ||
d5b81ced | 2057 | clear_and_wake_up_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags); |
2ce543f4 | 2058 | |
4dcbb8ab | 2059 | return 0; |
afba2bc0 | 2060 | } |
a85f05e5 | 2061 | |
d70cbdda NA |
2062 | int btrfs_zone_finish(struct btrfs_block_group *block_group) |
2063 | { | |
2064 | if (!btrfs_is_zoned(block_group->fs_info)) | |
2065 | return 0; | |
2066 | ||
2067 | return do_zone_finish(block_group, false); | |
2068 | } | |
2069 | ||
82187d2e | 2070 | bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) |
a85f05e5 | 2071 | { |
0b9e6676 | 2072 | struct btrfs_fs_info *fs_info = fs_devices->fs_info; |
a85f05e5 NA |
2073 | struct btrfs_device *device; |
2074 | bool ret = false; | |
2075 | ||
0b9e6676 | 2076 | if (!btrfs_is_zoned(fs_info)) |
a85f05e5 NA |
2077 | return true; |
2078 | ||
a85f05e5 | 2079 | /* Check if there is a device with active zones left */ |
0b9e6676 JT |
2080 | mutex_lock(&fs_info->chunk_mutex); |
2081 | list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) { | |
a85f05e5 NA |
2082 | struct btrfs_zoned_device_info *zinfo = device->zone_info; |
2083 | ||
2084 | if (!device->bdev) | |
2085 | continue; | |
2086 | ||
2087 | if (!zinfo->max_active_zones || | |
2088 | atomic_read(&zinfo->active_zones_left)) { | |
2089 | ret = true; | |
2090 | break; | |
2091 | } | |
2092 | } | |
0b9e6676 | 2093 | mutex_unlock(&fs_info->chunk_mutex); |
a85f05e5 | 2094 | |
2ce543f4 NA |
2095 | if (!ret) |
2096 | set_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags); | |
2097 | ||
a85f05e5 NA |
2098 | return ret; |
2099 | } | |
be1a1d7a NA |
2100 | |
2101 | void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length) | |
2102 | { | |
2103 | struct btrfs_block_group *block_group; | |
8b8a5399 | 2104 | u64 min_alloc_bytes; |
be1a1d7a NA |
2105 | |
2106 | if (!btrfs_is_zoned(fs_info)) | |
2107 | return; | |
2108 | ||
2109 | block_group = btrfs_lookup_block_group(fs_info, logical); | |
2110 | ASSERT(block_group); | |
2111 | ||
8b8a5399 NA |
2112 | /* No MIXED_BG on zoned btrfs. */ |
2113 | if (block_group->flags & BTRFS_BLOCK_GROUP_DATA) | |
2114 | min_alloc_bytes = fs_info->sectorsize; | |
2115 | else | |
2116 | min_alloc_bytes = fs_info->nodesize; | |
be1a1d7a | 2117 | |
8b8a5399 NA |
2118 | /* Bail out if we can allocate more data from this block group. */ |
2119 | if (logical + length + min_alloc_bytes <= | |
2120 | block_group->start + block_group->zone_capacity) | |
be1a1d7a | 2121 | goto out; |
be1a1d7a | 2122 | |
d70cbdda | 2123 | do_zone_finish(block_group, true); |
be1a1d7a | 2124 | |
be1a1d7a NA |
2125 | out: |
2126 | btrfs_put_block_group(block_group); | |
2127 | } | |
be1a1d7a | 2128 | |
56fbb0a4 NA |
2129 | static void btrfs_zone_finish_endio_workfn(struct work_struct *work) |
2130 | { | |
2131 | struct btrfs_block_group *bg = | |
2132 | container_of(work, struct btrfs_block_group, zone_finish_work); | |
be1a1d7a | 2133 | |
56fbb0a4 NA |
2134 | wait_on_extent_buffer_writeback(bg->last_eb); |
2135 | free_extent_buffer(bg->last_eb); | |
2136 | btrfs_zone_finish_endio(bg->fs_info, bg->start, bg->length); | |
2137 | btrfs_put_block_group(bg); | |
2138 | } | |
be1a1d7a | 2139 | |
56fbb0a4 NA |
2140 | void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, |
2141 | struct extent_buffer *eb) | |
2142 | { | |
2143 | if (!bg->seq_zone || eb->start + eb->len * 2 <= bg->start + bg->zone_capacity) | |
2144 | return; | |
be1a1d7a | 2145 | |
56fbb0a4 NA |
2146 | if (WARN_ON(bg->zone_finish_work.func == btrfs_zone_finish_endio_workfn)) { |
2147 | btrfs_err(bg->fs_info, "double scheduling of bg %llu zone finishing", | |
2148 | bg->start); | |
2149 | return; | |
2150 | } | |
be1a1d7a | 2151 | |
56fbb0a4 NA |
2152 | /* For the work */ |
2153 | btrfs_get_block_group(bg); | |
2154 | atomic_inc(&eb->refs); | |
2155 | bg->last_eb = eb; | |
2156 | INIT_WORK(&bg->zone_finish_work, btrfs_zone_finish_endio_workfn); | |
2157 | queue_work(system_unbound_wq, &bg->zone_finish_work); | |
be1a1d7a | 2158 | } |
c2707a25 JT |
2159 | |
2160 | void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) | |
2161 | { | |
2162 | struct btrfs_fs_info *fs_info = bg->fs_info; | |
2163 | ||
2164 | spin_lock(&fs_info->relocation_bg_lock); | |
2165 | if (fs_info->data_reloc_bg == bg->start) | |
2166 | fs_info->data_reloc_bg = 0; | |
2167 | spin_unlock(&fs_info->relocation_bg_lock); | |
2168 | } | |
16beac87 NA |
2169 | |
2170 | void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) | |
2171 | { | |
2172 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2173 | struct btrfs_device *device; | |
2174 | ||
2175 | if (!btrfs_is_zoned(fs_info)) | |
2176 | return; | |
2177 | ||
2178 | mutex_lock(&fs_devices->device_list_mutex); | |
2179 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
2180 | if (device->zone_info) { | |
2181 | vfree(device->zone_info->zone_cache); | |
2182 | device->zone_info->zone_cache = NULL; | |
2183 | } | |
2184 | } | |
2185 | mutex_unlock(&fs_devices->device_list_mutex); | |
2186 | } | |
3687fcb0 JT |
2187 | |
2188 | bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) | |
2189 | { | |
2190 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2191 | struct btrfs_device *device; | |
2192 | u64 used = 0; | |
2193 | u64 total = 0; | |
2194 | u64 factor; | |
2195 | ||
2196 | ASSERT(btrfs_is_zoned(fs_info)); | |
2197 | ||
2198 | if (fs_info->bg_reclaim_threshold == 0) | |
2199 | return false; | |
2200 | ||
2201 | mutex_lock(&fs_devices->device_list_mutex); | |
2202 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
2203 | if (!device->bdev) | |
2204 | continue; | |
2205 | ||
2206 | total += device->disk_total_bytes; | |
2207 | used += device->bytes_used; | |
2208 | } | |
2209 | mutex_unlock(&fs_devices->device_list_mutex); | |
2210 | ||
2211 | factor = div64_u64(used * 100, total); | |
2212 | return factor >= fs_info->bg_reclaim_threshold; | |
2213 | } | |
343d8a30 NA |
2214 | |
2215 | void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, | |
2216 | u64 length) | |
2217 | { | |
2218 | struct btrfs_block_group *block_group; | |
2219 | ||
2220 | if (!btrfs_is_zoned(fs_info)) | |
2221 | return; | |
2222 | ||
2223 | block_group = btrfs_lookup_block_group(fs_info, logical); | |
2224 | /* It should be called on a previous data relocation block group. */ | |
2225 | ASSERT(block_group && (block_group->flags & BTRFS_BLOCK_GROUP_DATA)); | |
2226 | ||
2227 | spin_lock(&block_group->lock); | |
3349b57f | 2228 | if (!test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, &block_group->runtime_flags)) |
343d8a30 NA |
2229 | goto out; |
2230 | ||
2231 | /* All relocation extents are written. */ | |
2232 | if (block_group->start + block_group->alloc_offset == logical + length) { | |
2233 | /* Now, release this block group for further allocations. */ | |
3349b57f JB |
2234 | clear_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, |
2235 | &block_group->runtime_flags); | |
343d8a30 NA |
2236 | } |
2237 | ||
2238 | out: | |
2239 | spin_unlock(&block_group->lock); | |
2240 | btrfs_put_block_group(block_group); | |
2241 | } | |
393f646e NA |
2242 | |
2243 | int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) | |
2244 | { | |
2245 | struct btrfs_block_group *block_group; | |
2246 | struct btrfs_block_group *min_bg = NULL; | |
2247 | u64 min_avail = U64_MAX; | |
2248 | int ret; | |
2249 | ||
2250 | spin_lock(&fs_info->zone_active_bgs_lock); | |
2251 | list_for_each_entry(block_group, &fs_info->zone_active_bgs, | |
2252 | active_bg_list) { | |
2253 | u64 avail; | |
2254 | ||
2255 | spin_lock(&block_group->lock); | |
2256 | if (block_group->reserved || | |
2257 | (block_group->flags & BTRFS_BLOCK_GROUP_SYSTEM)) { | |
2258 | spin_unlock(&block_group->lock); | |
2259 | continue; | |
2260 | } | |
2261 | ||
2262 | avail = block_group->zone_capacity - block_group->alloc_offset; | |
2263 | if (min_avail > avail) { | |
2264 | if (min_bg) | |
2265 | btrfs_put_block_group(min_bg); | |
2266 | min_bg = block_group; | |
2267 | min_avail = avail; | |
2268 | btrfs_get_block_group(min_bg); | |
2269 | } | |
2270 | spin_unlock(&block_group->lock); | |
2271 | } | |
2272 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2273 | ||
2274 | if (!min_bg) | |
2275 | return 0; | |
2276 | ||
2277 | ret = btrfs_zone_finish(min_bg); | |
2278 | btrfs_put_block_group(min_bg); | |
2279 | ||
2280 | return ret < 0 ? ret : 1; | |
2281 | } | |
b0931513 NA |
2282 | |
2283 | int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, | |
2284 | struct btrfs_space_info *space_info, | |
2285 | bool do_finish) | |
2286 | { | |
2287 | struct btrfs_block_group *bg; | |
2288 | int index; | |
2289 | ||
2290 | if (!btrfs_is_zoned(fs_info) || (space_info->flags & BTRFS_BLOCK_GROUP_DATA)) | |
2291 | return 0; | |
2292 | ||
2293 | /* No more block groups to activate */ | |
2294 | if (space_info->active_total_bytes == space_info->total_bytes) | |
2295 | return 0; | |
2296 | ||
2297 | for (;;) { | |
2298 | int ret; | |
2299 | bool need_finish = false; | |
2300 | ||
2301 | down_read(&space_info->groups_sem); | |
2302 | for (index = 0; index < BTRFS_NR_RAID_TYPES; index++) { | |
2303 | list_for_each_entry(bg, &space_info->block_groups[index], | |
2304 | list) { | |
2305 | if (!spin_trylock(&bg->lock)) | |
2306 | continue; | |
3349b57f JB |
2307 | if (btrfs_zoned_bg_is_full(bg) || |
2308 | test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, | |
2309 | &bg->runtime_flags)) { | |
b0931513 NA |
2310 | spin_unlock(&bg->lock); |
2311 | continue; | |
2312 | } | |
2313 | spin_unlock(&bg->lock); | |
2314 | ||
2315 | if (btrfs_zone_activate(bg)) { | |
2316 | up_read(&space_info->groups_sem); | |
2317 | return 1; | |
2318 | } | |
2319 | ||
2320 | need_finish = true; | |
2321 | } | |
2322 | } | |
2323 | up_read(&space_info->groups_sem); | |
2324 | ||
2325 | if (!do_finish || !need_finish) | |
2326 | break; | |
2327 | ||
2328 | ret = btrfs_zone_finish_one_bg(fs_info); | |
2329 | if (ret == 0) | |
2330 | break; | |
2331 | if (ret < 0) | |
2332 | return ret; | |
2333 | } | |
2334 | ||
2335 | return 0; | |
2336 | } |