Commit | Line | Data |
---|---|---|
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" |
71df088c | 18 | #include "super.h" |
c7f13d42 | 19 | #include "fs.h" |
07e81dc9 | 20 | #include "accessors.h" |
69ccf3f4 | 21 | #include "bio.h" |
5b316468 NA |
22 | |
23 | /* Maximum number of zones to report per blkdev_report_zones() call */ | |
24 | #define BTRFS_REPORT_NR_ZONES 4096 | |
08e11a3d NA |
25 | /* Invalid allocation pointer value for missing devices */ |
26 | #define WP_MISSING_DEV ((u64)-1) | |
27 | /* Pseudo write pointer value for conventional zone */ | |
28 | #define WP_CONVENTIONAL ((u64)-2) | |
5b316468 | 29 | |
53b74fa9 NA |
30 | /* |
31 | * Location of the first zone of superblock logging zone pairs. | |
32 | * | |
33 | * - primary superblock: 0B (zone 0) | |
34 | * - first copy: 512G (zone starting at that offset) | |
35 | * - second copy: 4T (zone starting at that offset) | |
36 | */ | |
37 | #define BTRFS_SB_LOG_PRIMARY_OFFSET (0ULL) | |
38 | #define BTRFS_SB_LOG_FIRST_OFFSET (512ULL * SZ_1G) | |
39 | #define BTRFS_SB_LOG_SECOND_OFFSET (4096ULL * SZ_1G) | |
40 | ||
41 | #define BTRFS_SB_LOG_FIRST_SHIFT const_ilog2(BTRFS_SB_LOG_FIRST_OFFSET) | |
42 | #define BTRFS_SB_LOG_SECOND_SHIFT const_ilog2(BTRFS_SB_LOG_SECOND_OFFSET) | |
43 | ||
12659251 NA |
44 | /* Number of superblock log zones */ |
45 | #define BTRFS_NR_SB_LOG_ZONES 2 | |
46 | ||
ea6f8ddc NA |
47 | /* |
48 | * Minimum of active zones we need: | |
49 | * | |
50 | * - BTRFS_SUPER_MIRROR_MAX zones for superblock mirrors | |
51 | * - 3 zones to ensure at least one zone per SYSTEM, META and DATA block group | |
52 | * - 1 zone for tree-log dedicated block group | |
53 | * - 1 zone for relocation | |
54 | */ | |
55 | #define BTRFS_MIN_ACTIVE_ZONES (BTRFS_SUPER_MIRROR_MAX + 5) | |
56 | ||
53b74fa9 | 57 | /* |
0a05fafe JT |
58 | * Minimum / maximum supported zone size. Currently, SMR disks have a zone |
59 | * size of 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range. | |
60 | * We do not expect the zone size to become larger than 8GiB or smaller than | |
61 | * 4MiB in the near future. | |
53b74fa9 NA |
62 | */ |
63 | #define BTRFS_MAX_ZONE_SIZE SZ_8G | |
0a05fafe | 64 | #define BTRFS_MIN_ZONE_SIZE SZ_4M |
53b74fa9 | 65 | |
5daaf552 NA |
66 | #define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT) |
67 | ||
13bb483d NA |
68 | static void wait_eb_writebacks(struct btrfs_block_group *block_group); |
69 | static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_written); | |
70 | ||
5daaf552 NA |
71 | static inline bool sb_zone_is_full(const struct blk_zone *zone) |
72 | { | |
73 | return (zone->cond == BLK_ZONE_COND_FULL) || | |
74 | (zone->wp + SUPER_INFO_SECTORS > zone->start + zone->capacity); | |
75 | } | |
76 | ||
5b316468 NA |
77 | static int copy_zone_info_cb(struct blk_zone *zone, unsigned int idx, void *data) |
78 | { | |
79 | struct blk_zone *zones = data; | |
80 | ||
81 | memcpy(&zones[idx], zone, sizeof(*zone)); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
12659251 NA |
86 | static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones, |
87 | u64 *wp_ret) | |
88 | { | |
89 | bool empty[BTRFS_NR_SB_LOG_ZONES]; | |
90 | bool full[BTRFS_NR_SB_LOG_ZONES]; | |
91 | sector_t sector; | |
5daaf552 | 92 | int i; |
12659251 | 93 | |
5daaf552 NA |
94 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
95 | ASSERT(zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL); | |
96 | empty[i] = (zones[i].cond == BLK_ZONE_COND_EMPTY); | |
97 | full[i] = sb_zone_is_full(&zones[i]); | |
98 | } | |
12659251 NA |
99 | |
100 | /* | |
101 | * Possible states of log buffer zones | |
102 | * | |
103 | * Empty[0] In use[0] Full[0] | |
31f37269 PR |
104 | * Empty[1] * 0 1 |
105 | * In use[1] x x 1 | |
106 | * Full[1] 0 0 C | |
12659251 NA |
107 | * |
108 | * Log position: | |
109 | * *: Special case, no superblock is written | |
110 | * 0: Use write pointer of zones[0] | |
111 | * 1: Use write pointer of zones[1] | |
1a9fd417 | 112 | * C: Compare super blocks from zones[0] and zones[1], use the latest |
12659251 NA |
113 | * one determined by generation |
114 | * x: Invalid state | |
115 | */ | |
116 | ||
117 | if (empty[0] && empty[1]) { | |
118 | /* Special case to distinguish no superblock to read */ | |
119 | *wp_ret = zones[0].start << SECTOR_SHIFT; | |
120 | return -ENOENT; | |
121 | } else if (full[0] && full[1]) { | |
122 | /* Compare two super blocks */ | |
123 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
124 | struct page *page[BTRFS_NR_SB_LOG_ZONES]; | |
125 | struct btrfs_super_block *super[BTRFS_NR_SB_LOG_ZONES]; | |
126 | int i; | |
127 | ||
128 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { | |
02ca9e6f NA |
129 | u64 zone_end = (zones[i].start + zones[i].capacity) << SECTOR_SHIFT; |
130 | u64 bytenr = ALIGN_DOWN(zone_end, BTRFS_SUPER_INFO_SIZE) - | |
131 | BTRFS_SUPER_INFO_SIZE; | |
12659251 NA |
132 | |
133 | page[i] = read_cache_page_gfp(mapping, | |
134 | bytenr >> PAGE_SHIFT, GFP_NOFS); | |
135 | if (IS_ERR(page[i])) { | |
136 | if (i == 1) | |
137 | btrfs_release_disk_super(super[0]); | |
138 | return PTR_ERR(page[i]); | |
139 | } | |
140 | super[i] = page_address(page[i]); | |
141 | } | |
142 | ||
c51f0e6a CH |
143 | if (btrfs_super_generation(super[0]) > |
144 | btrfs_super_generation(super[1])) | |
12659251 NA |
145 | sector = zones[1].start; |
146 | else | |
147 | sector = zones[0].start; | |
148 | ||
149 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) | |
150 | btrfs_release_disk_super(super[i]); | |
151 | } else if (!full[0] && (empty[1] || full[1])) { | |
152 | sector = zones[0].wp; | |
153 | } else if (full[0]) { | |
154 | sector = zones[1].wp; | |
155 | } else { | |
156 | return -EUCLEAN; | |
157 | } | |
158 | *wp_ret = sector << SECTOR_SHIFT; | |
159 | return 0; | |
160 | } | |
161 | ||
162 | /* | |
53b74fa9 | 163 | * Get the first zone number of the superblock mirror |
12659251 NA |
164 | */ |
165 | static inline u32 sb_zone_number(int shift, int mirror) | |
166 | { | |
12adffe6 | 167 | u64 zone = U64_MAX; |
12659251 | 168 | |
53b74fa9 | 169 | ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX); |
12659251 | 170 | switch (mirror) { |
53b74fa9 NA |
171 | case 0: zone = 0; break; |
172 | case 1: zone = 1ULL << (BTRFS_SB_LOG_FIRST_SHIFT - shift); break; | |
173 | case 2: zone = 1ULL << (BTRFS_SB_LOG_SECOND_SHIFT - shift); break; | |
12659251 NA |
174 | } |
175 | ||
53b74fa9 NA |
176 | ASSERT(zone <= U32_MAX); |
177 | ||
178 | return (u32)zone; | |
12659251 NA |
179 | } |
180 | ||
5b434df8 NA |
181 | static inline sector_t zone_start_sector(u32 zone_number, |
182 | struct block_device *bdev) | |
183 | { | |
184 | return (sector_t)zone_number << ilog2(bdev_zone_sectors(bdev)); | |
185 | } | |
186 | ||
187 | static inline u64 zone_start_physical(u32 zone_number, | |
188 | struct btrfs_zoned_device_info *zone_info) | |
189 | { | |
190 | return (u64)zone_number << zone_info->zone_size_shift; | |
191 | } | |
192 | ||
3c9daa09 JT |
193 | /* |
194 | * Emulate blkdev_report_zones() for a non-zoned device. It slices up the block | |
195 | * device into static sized chunks and fake a conventional zone on each of | |
196 | * them. | |
197 | */ | |
198 | static int emulate_report_zones(struct btrfs_device *device, u64 pos, | |
199 | struct blk_zone *zones, unsigned int nr_zones) | |
200 | { | |
201 | const sector_t zone_sectors = device->fs_info->zone_size >> SECTOR_SHIFT; | |
202 | sector_t bdev_size = bdev_nr_sectors(device->bdev); | |
203 | unsigned int i; | |
204 | ||
205 | pos >>= SECTOR_SHIFT; | |
206 | for (i = 0; i < nr_zones; i++) { | |
207 | zones[i].start = i * zone_sectors + pos; | |
208 | zones[i].len = zone_sectors; | |
209 | zones[i].capacity = zone_sectors; | |
210 | zones[i].wp = zones[i].start + zone_sectors; | |
211 | zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL; | |
212 | zones[i].cond = BLK_ZONE_COND_NOT_WP; | |
213 | ||
214 | if (zones[i].wp >= bdev_size) { | |
215 | i++; | |
216 | break; | |
217 | } | |
218 | } | |
219 | ||
220 | return i; | |
221 | } | |
222 | ||
5b316468 NA |
223 | static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos, |
224 | struct blk_zone *zones, unsigned int *nr_zones) | |
225 | { | |
16beac87 | 226 | struct btrfs_zoned_device_info *zinfo = device->zone_info; |
5b316468 NA |
227 | int ret; |
228 | ||
229 | if (!*nr_zones) | |
230 | return 0; | |
231 | ||
3c9daa09 JT |
232 | if (!bdev_is_zoned(device->bdev)) { |
233 | ret = emulate_report_zones(device, pos, zones, *nr_zones); | |
234 | *nr_zones = ret; | |
235 | return 0; | |
236 | } | |
237 | ||
16beac87 NA |
238 | /* Check cache */ |
239 | if (zinfo->zone_cache) { | |
240 | unsigned int i; | |
cd30d3bc | 241 | u32 zno; |
16beac87 NA |
242 | |
243 | ASSERT(IS_ALIGNED(pos, zinfo->zone_size)); | |
244 | zno = pos >> zinfo->zone_size_shift; | |
245 | /* | |
246 | * We cannot report zones beyond the zone end. So, it is OK to | |
247 | * cap *nr_zones to at the end. | |
248 | */ | |
249 | *nr_zones = min_t(u32, *nr_zones, zinfo->nr_zones - zno); | |
250 | ||
251 | for (i = 0; i < *nr_zones; i++) { | |
252 | struct blk_zone *zone_info; | |
253 | ||
254 | zone_info = &zinfo->zone_cache[zno + i]; | |
255 | if (!zone_info->len) | |
256 | break; | |
257 | } | |
258 | ||
259 | if (i == *nr_zones) { | |
260 | /* Cache hit on all the zones */ | |
261 | memcpy(zones, zinfo->zone_cache + zno, | |
262 | sizeof(*zinfo->zone_cache) * *nr_zones); | |
263 | return 0; | |
264 | } | |
265 | } | |
266 | ||
5b316468 NA |
267 | ret = blkdev_report_zones(device->bdev, pos >> SECTOR_SHIFT, *nr_zones, |
268 | copy_zone_info_cb, zones); | |
269 | if (ret < 0) { | |
270 | btrfs_err_in_rcu(device->fs_info, | |
271 | "zoned: failed to read zone %llu on %s (devid %llu)", | |
272 | pos, rcu_str_deref(device->name), | |
273 | device->devid); | |
274 | return ret; | |
275 | } | |
276 | *nr_zones = ret; | |
277 | if (!ret) | |
278 | return -EIO; | |
279 | ||
16beac87 | 280 | /* Populate cache */ |
cd30d3bc NA |
281 | if (zinfo->zone_cache) { |
282 | u32 zno = pos >> zinfo->zone_size_shift; | |
283 | ||
16beac87 NA |
284 | memcpy(zinfo->zone_cache + zno, zones, |
285 | sizeof(*zinfo->zone_cache) * *nr_zones); | |
cd30d3bc | 286 | } |
16beac87 | 287 | |
5b316468 NA |
288 | return 0; |
289 | } | |
290 | ||
3c9daa09 JT |
291 | /* The emulated zone size is determined from the size of device extent */ |
292 | static int calculate_emulated_zone_size(struct btrfs_fs_info *fs_info) | |
293 | { | |
294 | struct btrfs_path *path; | |
295 | struct btrfs_root *root = fs_info->dev_root; | |
296 | struct btrfs_key key; | |
297 | struct extent_buffer *leaf; | |
298 | struct btrfs_dev_extent *dext; | |
299 | int ret = 0; | |
300 | ||
301 | key.objectid = 1; | |
302 | key.type = BTRFS_DEV_EXTENT_KEY; | |
303 | key.offset = 0; | |
304 | ||
305 | path = btrfs_alloc_path(); | |
306 | if (!path) | |
307 | return -ENOMEM; | |
308 | ||
309 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); | |
310 | if (ret < 0) | |
311 | goto out; | |
312 | ||
313 | if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) { | |
ad9a9378 | 314 | ret = btrfs_next_leaf(root, path); |
3c9daa09 JT |
315 | if (ret < 0) |
316 | goto out; | |
317 | /* No dev extents at all? Not good */ | |
318 | if (ret > 0) { | |
319 | ret = -EUCLEAN; | |
320 | goto out; | |
321 | } | |
322 | } | |
323 | ||
324 | leaf = path->nodes[0]; | |
325 | dext = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent); | |
326 | fs_info->zone_size = btrfs_dev_extent_length(leaf, dext); | |
327 | ret = 0; | |
328 | ||
329 | out: | |
330 | btrfs_free_path(path); | |
331 | ||
332 | return ret; | |
333 | } | |
334 | ||
73651042 NA |
335 | int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) |
336 | { | |
337 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
338 | struct btrfs_device *device; | |
339 | int ret = 0; | |
340 | ||
341 | /* fs_info->zone_size might not set yet. Use the incomapt flag here. */ | |
342 | if (!btrfs_fs_incompat(fs_info, ZONED)) | |
343 | return 0; | |
344 | ||
345 | mutex_lock(&fs_devices->device_list_mutex); | |
346 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
347 | /* We can skip reading of zone info for missing devices */ | |
348 | if (!device->bdev) | |
349 | continue; | |
350 | ||
16beac87 | 351 | ret = btrfs_get_dev_zone_info(device, true); |
73651042 NA |
352 | if (ret) |
353 | break; | |
354 | } | |
355 | mutex_unlock(&fs_devices->device_list_mutex); | |
356 | ||
357 | return ret; | |
358 | } | |
359 | ||
16beac87 | 360 | int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache) |
5b316468 | 361 | { |
3c9daa09 | 362 | struct btrfs_fs_info *fs_info = device->fs_info; |
5b316468 NA |
363 | struct btrfs_zoned_device_info *zone_info = NULL; |
364 | struct block_device *bdev = device->bdev; | |
ea6f8ddc NA |
365 | unsigned int max_active_zones; |
366 | unsigned int nactive; | |
5b316468 NA |
367 | sector_t nr_sectors; |
368 | sector_t sector = 0; | |
369 | struct blk_zone *zones = NULL; | |
370 | unsigned int i, nreported = 0, nr_zones; | |
d734492a | 371 | sector_t zone_sectors; |
3c9daa09 | 372 | char *model, *emulated; |
5b316468 NA |
373 | int ret; |
374 | ||
3c9daa09 JT |
375 | /* |
376 | * Cannot use btrfs_is_zoned here, since fs_info::zone_size might not | |
377 | * yet be set. | |
378 | */ | |
379 | if (!btrfs_fs_incompat(fs_info, ZONED)) | |
5b316468 NA |
380 | return 0; |
381 | ||
382 | if (device->zone_info) | |
383 | return 0; | |
384 | ||
385 | zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL); | |
386 | if (!zone_info) | |
387 | return -ENOMEM; | |
388 | ||
16beac87 NA |
389 | device->zone_info = zone_info; |
390 | ||
3c9daa09 JT |
391 | if (!bdev_is_zoned(bdev)) { |
392 | if (!fs_info->zone_size) { | |
393 | ret = calculate_emulated_zone_size(fs_info); | |
394 | if (ret) | |
395 | goto out; | |
396 | } | |
397 | ||
398 | ASSERT(fs_info->zone_size); | |
399 | zone_sectors = fs_info->zone_size >> SECTOR_SHIFT; | |
400 | } else { | |
401 | zone_sectors = bdev_zone_sectors(bdev); | |
402 | } | |
403 | ||
fd463ac4 | 404 | ASSERT(is_power_of_two_u64(zone_sectors)); |
5b316468 | 405 | zone_info->zone_size = zone_sectors << SECTOR_SHIFT; |
53b74fa9 NA |
406 | |
407 | /* We reject devices with a zone size larger than 8GB */ | |
408 | if (zone_info->zone_size > BTRFS_MAX_ZONE_SIZE) { | |
409 | btrfs_err_in_rcu(fs_info, | |
410 | "zoned: %s: zone size %llu larger than supported maximum %llu", | |
411 | rcu_str_deref(device->name), | |
412 | zone_info->zone_size, BTRFS_MAX_ZONE_SIZE); | |
413 | ret = -EINVAL; | |
414 | goto out; | |
0a05fafe JT |
415 | } else if (zone_info->zone_size < BTRFS_MIN_ZONE_SIZE) { |
416 | btrfs_err_in_rcu(fs_info, | |
417 | "zoned: %s: zone size %llu smaller than supported minimum %u", | |
418 | rcu_str_deref(device->name), | |
419 | zone_info->zone_size, BTRFS_MIN_ZONE_SIZE); | |
420 | ret = -EINVAL; | |
421 | goto out; | |
53b74fa9 NA |
422 | } |
423 | ||
424 | nr_sectors = bdev_nr_sectors(bdev); | |
5b316468 NA |
425 | zone_info->zone_size_shift = ilog2(zone_info->zone_size); |
426 | zone_info->nr_zones = nr_sectors >> ilog2(zone_sectors); | |
427 | if (!IS_ALIGNED(nr_sectors, zone_sectors)) | |
428 | zone_info->nr_zones++; | |
429 | ||
c1e7b244 | 430 | max_active_zones = bdev_max_active_zones(bdev); |
ea6f8ddc NA |
431 | if (max_active_zones && max_active_zones < BTRFS_MIN_ACTIVE_ZONES) { |
432 | btrfs_err_in_rcu(fs_info, | |
433 | "zoned: %s: max active zones %u is too small, need at least %u active zones", | |
434 | rcu_str_deref(device->name), max_active_zones, | |
435 | BTRFS_MIN_ACTIVE_ZONES); | |
436 | ret = -EINVAL; | |
437 | goto out; | |
438 | } | |
439 | zone_info->max_active_zones = max_active_zones; | |
440 | ||
5b316468 NA |
441 | zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
442 | if (!zone_info->seq_zones) { | |
443 | ret = -ENOMEM; | |
444 | goto out; | |
445 | } | |
446 | ||
447 | zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); | |
448 | if (!zone_info->empty_zones) { | |
449 | ret = -ENOMEM; | |
450 | goto out; | |
451 | } | |
452 | ||
ea6f8ddc NA |
453 | zone_info->active_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
454 | if (!zone_info->active_zones) { | |
455 | ret = -ENOMEM; | |
456 | goto out; | |
457 | } | |
458 | ||
8fe97d47 | 459 | zones = kvcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL); |
5b316468 NA |
460 | if (!zones) { |
461 | ret = -ENOMEM; | |
462 | goto out; | |
463 | } | |
464 | ||
16beac87 NA |
465 | /* |
466 | * Enable zone cache only for a zoned device. On a non-zoned device, we | |
467 | * fill the zone info with emulated CONVENTIONAL zones, so no need to | |
468 | * use the cache. | |
469 | */ | |
470 | if (populate_cache && bdev_is_zoned(device->bdev)) { | |
07a3bb95 JL |
471 | zone_info->zone_cache = vcalloc(zone_info->nr_zones, |
472 | sizeof(struct blk_zone)); | |
16beac87 NA |
473 | if (!zone_info->zone_cache) { |
474 | btrfs_err_in_rcu(device->fs_info, | |
475 | "zoned: failed to allocate zone cache for %s", | |
476 | rcu_str_deref(device->name)); | |
477 | ret = -ENOMEM; | |
478 | goto out; | |
479 | } | |
480 | } | |
481 | ||
5b316468 | 482 | /* Get zones type */ |
ea6f8ddc | 483 | nactive = 0; |
5b316468 NA |
484 | while (sector < nr_sectors) { |
485 | nr_zones = BTRFS_REPORT_NR_ZONES; | |
486 | ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones, | |
487 | &nr_zones); | |
488 | if (ret) | |
489 | goto out; | |
490 | ||
491 | for (i = 0; i < nr_zones; i++) { | |
492 | if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ) | |
493 | __set_bit(nreported, zone_info->seq_zones); | |
ea6f8ddc NA |
494 | switch (zones[i].cond) { |
495 | case BLK_ZONE_COND_EMPTY: | |
5b316468 | 496 | __set_bit(nreported, zone_info->empty_zones); |
ea6f8ddc NA |
497 | break; |
498 | case BLK_ZONE_COND_IMP_OPEN: | |
499 | case BLK_ZONE_COND_EXP_OPEN: | |
500 | case BLK_ZONE_COND_CLOSED: | |
501 | __set_bit(nreported, zone_info->active_zones); | |
502 | nactive++; | |
503 | break; | |
504 | } | |
5b316468 NA |
505 | nreported++; |
506 | } | |
507 | sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len; | |
508 | } | |
509 | ||
510 | if (nreported != zone_info->nr_zones) { | |
511 | btrfs_err_in_rcu(device->fs_info, | |
512 | "inconsistent number of zones on %s (%u/%u)", | |
513 | rcu_str_deref(device->name), nreported, | |
514 | zone_info->nr_zones); | |
515 | ret = -EIO; | |
516 | goto out; | |
517 | } | |
518 | ||
ea6f8ddc NA |
519 | if (max_active_zones) { |
520 | if (nactive > max_active_zones) { | |
521 | btrfs_err_in_rcu(device->fs_info, | |
522 | "zoned: %u active zones on %s exceeds max_active_zones %u", | |
523 | nactive, rcu_str_deref(device->name), | |
524 | max_active_zones); | |
525 | ret = -EIO; | |
526 | goto out; | |
527 | } | |
528 | atomic_set(&zone_info->active_zones_left, | |
529 | max_active_zones - nactive); | |
bf1f1fec | 530 | set_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags); |
ea6f8ddc NA |
531 | } |
532 | ||
12659251 NA |
533 | /* Validate superblock log */ |
534 | nr_zones = BTRFS_NR_SB_LOG_ZONES; | |
535 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { | |
536 | u32 sb_zone; | |
537 | u64 sb_wp; | |
538 | int sb_pos = BTRFS_NR_SB_LOG_ZONES * i; | |
539 | ||
540 | sb_zone = sb_zone_number(zone_info->zone_size_shift, i); | |
541 | if (sb_zone + 1 >= zone_info->nr_zones) | |
542 | continue; | |
543 | ||
5b434df8 NA |
544 | ret = btrfs_get_dev_zones(device, |
545 | zone_start_physical(sb_zone, zone_info), | |
12659251 NA |
546 | &zone_info->sb_zones[sb_pos], |
547 | &nr_zones); | |
548 | if (ret) | |
549 | goto out; | |
550 | ||
551 | if (nr_zones != BTRFS_NR_SB_LOG_ZONES) { | |
552 | btrfs_err_in_rcu(device->fs_info, | |
553 | "zoned: failed to read super block log zone info at devid %llu zone %u", | |
554 | device->devid, sb_zone); | |
555 | ret = -EUCLEAN; | |
556 | goto out; | |
557 | } | |
558 | ||
559 | /* | |
1a9fd417 | 560 | * If zones[0] is conventional, always use the beginning of the |
12659251 NA |
561 | * zone to record superblock. No need to validate in that case. |
562 | */ | |
563 | if (zone_info->sb_zones[BTRFS_NR_SB_LOG_ZONES * i].type == | |
564 | BLK_ZONE_TYPE_CONVENTIONAL) | |
565 | continue; | |
566 | ||
567 | ret = sb_write_pointer(device->bdev, | |
568 | &zone_info->sb_zones[sb_pos], &sb_wp); | |
569 | if (ret != -ENOENT && ret) { | |
570 | btrfs_err_in_rcu(device->fs_info, | |
571 | "zoned: super block log zone corrupted devid %llu zone %u", | |
572 | device->devid, sb_zone); | |
573 | ret = -EUCLEAN; | |
574 | goto out; | |
575 | } | |
576 | } | |
577 | ||
578 | ||
8fe97d47 | 579 | kvfree(zones); |
5b316468 | 580 | |
3c9daa09 JT |
581 | switch (bdev_zoned_model(bdev)) { |
582 | case BLK_ZONED_HM: | |
583 | model = "host-managed zoned"; | |
584 | emulated = ""; | |
585 | break; | |
586 | case BLK_ZONED_HA: | |
587 | model = "host-aware zoned"; | |
588 | emulated = ""; | |
589 | break; | |
590 | case BLK_ZONED_NONE: | |
591 | model = "regular"; | |
592 | emulated = "emulated "; | |
593 | break; | |
594 | default: | |
595 | /* Just in case */ | |
596 | btrfs_err_in_rcu(fs_info, "zoned: unsupported model %d on %s", | |
597 | bdev_zoned_model(bdev), | |
598 | rcu_str_deref(device->name)); | |
599 | ret = -EOPNOTSUPP; | |
600 | goto out_free_zone_info; | |
601 | } | |
602 | ||
603 | btrfs_info_in_rcu(fs_info, | |
604 | "%s block device %s, %u %szones of %llu bytes", | |
605 | model, rcu_str_deref(device->name), zone_info->nr_zones, | |
606 | emulated, zone_info->zone_size); | |
5b316468 NA |
607 | |
608 | return 0; | |
609 | ||
610 | out: | |
8fe97d47 | 611 | kvfree(zones); |
3c9daa09 | 612 | out_free_zone_info: |
16beac87 | 613 | btrfs_destroy_dev_zone_info(device); |
5b316468 NA |
614 | |
615 | return ret; | |
616 | } | |
617 | ||
618 | void btrfs_destroy_dev_zone_info(struct btrfs_device *device) | |
619 | { | |
620 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
621 | ||
622 | if (!zone_info) | |
623 | return; | |
624 | ||
ea6f8ddc | 625 | bitmap_free(zone_info->active_zones); |
5b316468 NA |
626 | bitmap_free(zone_info->seq_zones); |
627 | bitmap_free(zone_info->empty_zones); | |
16beac87 | 628 | vfree(zone_info->zone_cache); |
5b316468 NA |
629 | kfree(zone_info); |
630 | device->zone_info = NULL; | |
631 | } | |
632 | ||
21e61ec6 JT |
633 | struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev) |
634 | { | |
635 | struct btrfs_zoned_device_info *zone_info; | |
636 | ||
637 | zone_info = kmemdup(orig_dev->zone_info, sizeof(*zone_info), GFP_KERNEL); | |
638 | if (!zone_info) | |
639 | return NULL; | |
640 | ||
641 | zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); | |
642 | if (!zone_info->seq_zones) | |
643 | goto out; | |
644 | ||
645 | bitmap_copy(zone_info->seq_zones, orig_dev->zone_info->seq_zones, | |
646 | zone_info->nr_zones); | |
647 | ||
648 | zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); | |
649 | if (!zone_info->empty_zones) | |
650 | goto out; | |
651 | ||
652 | bitmap_copy(zone_info->empty_zones, orig_dev->zone_info->empty_zones, | |
653 | zone_info->nr_zones); | |
654 | ||
655 | zone_info->active_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); | |
656 | if (!zone_info->active_zones) | |
657 | goto out; | |
658 | ||
659 | bitmap_copy(zone_info->active_zones, orig_dev->zone_info->active_zones, | |
660 | zone_info->nr_zones); | |
661 | zone_info->zone_cache = NULL; | |
662 | ||
663 | return zone_info; | |
664 | ||
665 | out: | |
666 | bitmap_free(zone_info->seq_zones); | |
667 | bitmap_free(zone_info->empty_zones); | |
668 | bitmap_free(zone_info->active_zones); | |
669 | kfree(zone_info); | |
670 | return NULL; | |
671 | } | |
672 | ||
5b316468 NA |
673 | int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, |
674 | struct blk_zone *zone) | |
675 | { | |
676 | unsigned int nr_zones = 1; | |
677 | int ret; | |
678 | ||
679 | ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones); | |
680 | if (ret != 0 || !nr_zones) | |
681 | return ret ? ret : -EIO; | |
682 | ||
683 | return 0; | |
684 | } | |
b70f5097 | 685 | |
650c8a9c CH |
686 | static int btrfs_check_for_zoned_device(struct btrfs_fs_info *fs_info) |
687 | { | |
688 | struct btrfs_device *device; | |
689 | ||
690 | list_for_each_entry(device, &fs_info->fs_devices->devices, dev_list) { | |
691 | if (device->bdev && | |
692 | bdev_zoned_model(device->bdev) == BLK_ZONED_HM) { | |
693 | btrfs_err(fs_info, | |
694 | "zoned: mode not enabled but zoned device found: %pg", | |
695 | device->bdev); | |
696 | return -EINVAL; | |
697 | } | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
b70f5097 NA |
703 | int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) |
704 | { | |
243cf8d1 | 705 | struct queue_limits *lim = &fs_info->limits; |
b70f5097 | 706 | struct btrfs_device *device; |
b70f5097 | 707 | u64 zone_size = 0; |
650c8a9c | 708 | int ret; |
b70f5097 | 709 | |
650c8a9c CH |
710 | /* |
711 | * Host-Managed devices can't be used without the ZONED flag. With the | |
712 | * ZONED all devices can be used, using zone emulation if required. | |
713 | */ | |
714 | if (!btrfs_fs_incompat(fs_info, ZONED)) | |
715 | return btrfs_check_for_zoned_device(fs_info); | |
716 | ||
243cf8d1 CH |
717 | blk_set_stacking_limits(lim); |
718 | ||
650c8a9c CH |
719 | list_for_each_entry(device, &fs_info->fs_devices->devices, dev_list) { |
720 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
b70f5097 NA |
721 | |
722 | if (!device->bdev) | |
723 | continue; | |
724 | ||
650c8a9c CH |
725 | if (!zone_size) { |
726 | zone_size = zone_info->zone_size; | |
727 | } else if (zone_info->zone_size != zone_size) { | |
728 | btrfs_err(fs_info, | |
b70f5097 | 729 | "zoned: unequal block device zone sizes: have %llu found %llu", |
650c8a9c CH |
730 | zone_info->zone_size, zone_size); |
731 | return -EINVAL; | |
b70f5097 | 732 | } |
243cf8d1 CH |
733 | |
734 | /* | |
735 | * With the zoned emulation, we can have non-zoned device on the | |
736 | * zoned mode. In this case, we don't have a valid max zone | |
737 | * append size. | |
738 | */ | |
739 | if (bdev_is_zoned(device->bdev)) { | |
740 | blk_stack_limits(lim, | |
741 | &bdev_get_queue(device->bdev)->limits, | |
742 | 0); | |
743 | } | |
b70f5097 NA |
744 | } |
745 | ||
746 | /* | |
747 | * stripe_size is always aligned to BTRFS_STRIPE_LEN in | |
f6f39f7a | 748 | * btrfs_create_chunk(). Since we want stripe_len == zone_size, |
b70f5097 NA |
749 | * check the alignment here. |
750 | */ | |
751 | if (!IS_ALIGNED(zone_size, BTRFS_STRIPE_LEN)) { | |
752 | btrfs_err(fs_info, | |
753 | "zoned: zone size %llu not aligned to stripe %u", | |
754 | zone_size, BTRFS_STRIPE_LEN); | |
650c8a9c | 755 | return -EINVAL; |
b70f5097 NA |
756 | } |
757 | ||
a589dde0 NA |
758 | if (btrfs_fs_incompat(fs_info, MIXED_GROUPS)) { |
759 | btrfs_err(fs_info, "zoned: mixed block groups not supported"); | |
650c8a9c | 760 | return -EINVAL; |
a589dde0 NA |
761 | } |
762 | ||
b70f5097 | 763 | fs_info->zone_size = zone_size; |
243cf8d1 CH |
764 | /* |
765 | * Also limit max_zone_append_size by max_segments * PAGE_SIZE. | |
766 | * Technically, we can have multiple pages per segment. But, since | |
767 | * we add the pages one by one to a bio, and cannot increase the | |
768 | * metadata reservation even if it increases the number of extents, it | |
769 | * is safe to stick with the limit. | |
770 | */ | |
771 | fs_info->max_zone_append_size = ALIGN_DOWN( | |
772 | min3((u64)lim->max_zone_append_sectors << SECTOR_SHIFT, | |
773 | (u64)lim->max_sectors << SECTOR_SHIFT, | |
774 | (u64)lim->max_segments << PAGE_SHIFT), | |
775 | fs_info->sectorsize); | |
1cd6121f | 776 | fs_info->fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_ZONED; |
f7b12a62 NA |
777 | if (fs_info->max_zone_append_size < fs_info->max_extent_size) |
778 | fs_info->max_extent_size = fs_info->max_zone_append_size; | |
b70f5097 | 779 | |
b53429ba JT |
780 | /* |
781 | * Check mount options here, because we might change fs_info->zoned | |
782 | * from fs_info->zone_size. | |
783 | */ | |
784 | ret = btrfs_check_mountopts_zoned(fs_info); | |
785 | if (ret) | |
650c8a9c | 786 | return ret; |
b53429ba | 787 | |
b70f5097 | 788 | btrfs_info(fs_info, "zoned mode enabled with zone size %llu", zone_size); |
650c8a9c | 789 | return 0; |
b70f5097 | 790 | } |
5d1ab66c NA |
791 | |
792 | int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) | |
793 | { | |
794 | if (!btrfs_is_zoned(info)) | |
795 | return 0; | |
796 | ||
797 | /* | |
798 | * Space cache writing is not COWed. Disable that to avoid write errors | |
799 | * in sequential zones. | |
800 | */ | |
801 | if (btrfs_test_opt(info, SPACE_CACHE)) { | |
802 | btrfs_err(info, "zoned: space cache v1 is not supported"); | |
803 | return -EINVAL; | |
804 | } | |
805 | ||
d206e9c9 NA |
806 | if (btrfs_test_opt(info, NODATACOW)) { |
807 | btrfs_err(info, "zoned: NODATACOW not supported"); | |
808 | return -EINVAL; | |
809 | } | |
810 | ||
95ca6599 NA |
811 | btrfs_clear_and_info(info, DISCARD_ASYNC, |
812 | "zoned: async discard ignored and disabled for zoned mode"); | |
813 | ||
5d1ab66c NA |
814 | return 0; |
815 | } | |
12659251 NA |
816 | |
817 | static int sb_log_location(struct block_device *bdev, struct blk_zone *zones, | |
818 | int rw, u64 *bytenr_ret) | |
819 | { | |
820 | u64 wp; | |
821 | int ret; | |
822 | ||
823 | if (zones[0].type == BLK_ZONE_TYPE_CONVENTIONAL) { | |
824 | *bytenr_ret = zones[0].start << SECTOR_SHIFT; | |
825 | return 0; | |
826 | } | |
827 | ||
828 | ret = sb_write_pointer(bdev, zones, &wp); | |
829 | if (ret != -ENOENT && ret < 0) | |
830 | return ret; | |
831 | ||
832 | if (rw == WRITE) { | |
833 | struct blk_zone *reset = NULL; | |
834 | ||
835 | if (wp == zones[0].start << SECTOR_SHIFT) | |
836 | reset = &zones[0]; | |
837 | else if (wp == zones[1].start << SECTOR_SHIFT) | |
838 | reset = &zones[1]; | |
839 | ||
840 | if (reset && reset->cond != BLK_ZONE_COND_EMPTY) { | |
5daaf552 | 841 | ASSERT(sb_zone_is_full(reset)); |
12659251 NA |
842 | |
843 | ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, | |
844 | reset->start, reset->len, | |
845 | GFP_NOFS); | |
846 | if (ret) | |
847 | return ret; | |
848 | ||
849 | reset->cond = BLK_ZONE_COND_EMPTY; | |
850 | reset->wp = reset->start; | |
851 | } | |
852 | } else if (ret != -ENOENT) { | |
9658b72e NA |
853 | /* |
854 | * For READ, we want the previous one. Move write pointer to | |
855 | * the end of a zone, if it is at the head of a zone. | |
856 | */ | |
857 | u64 zone_end = 0; | |
858 | ||
12659251 | 859 | if (wp == zones[0].start << SECTOR_SHIFT) |
9658b72e NA |
860 | zone_end = zones[1].start + zones[1].capacity; |
861 | else if (wp == zones[1].start << SECTOR_SHIFT) | |
862 | zone_end = zones[0].start + zones[0].capacity; | |
863 | if (zone_end) | |
864 | wp = ALIGN_DOWN(zone_end << SECTOR_SHIFT, | |
865 | BTRFS_SUPER_INFO_SIZE); | |
866 | ||
12659251 NA |
867 | wp -= BTRFS_SUPER_INFO_SIZE; |
868 | } | |
869 | ||
870 | *bytenr_ret = wp; | |
871 | return 0; | |
872 | ||
873 | } | |
874 | ||
875 | int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, | |
876 | u64 *bytenr_ret) | |
877 | { | |
878 | struct blk_zone zones[BTRFS_NR_SB_LOG_ZONES]; | |
d734492a | 879 | sector_t zone_sectors; |
12659251 NA |
880 | u32 sb_zone; |
881 | int ret; | |
12659251 NA |
882 | u8 zone_sectors_shift; |
883 | sector_t nr_sectors; | |
884 | u32 nr_zones; | |
885 | ||
886 | if (!bdev_is_zoned(bdev)) { | |
887 | *bytenr_ret = btrfs_sb_offset(mirror); | |
888 | return 0; | |
889 | } | |
890 | ||
891 | ASSERT(rw == READ || rw == WRITE); | |
892 | ||
893 | zone_sectors = bdev_zone_sectors(bdev); | |
894 | if (!is_power_of_2(zone_sectors)) | |
895 | return -EINVAL; | |
12659251 | 896 | zone_sectors_shift = ilog2(zone_sectors); |
ac7ac461 | 897 | nr_sectors = bdev_nr_sectors(bdev); |
12659251 NA |
898 | nr_zones = nr_sectors >> zone_sectors_shift; |
899 | ||
900 | sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); | |
901 | if (sb_zone + 1 >= nr_zones) | |
902 | return -ENOENT; | |
903 | ||
5b434df8 | 904 | ret = blkdev_report_zones(bdev, zone_start_sector(sb_zone, bdev), |
12659251 NA |
905 | BTRFS_NR_SB_LOG_ZONES, copy_zone_info_cb, |
906 | zones); | |
907 | if (ret < 0) | |
908 | return ret; | |
909 | if (ret != BTRFS_NR_SB_LOG_ZONES) | |
910 | return -EIO; | |
911 | ||
912 | return sb_log_location(bdev, zones, rw, bytenr_ret); | |
913 | } | |
914 | ||
915 | int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, | |
916 | u64 *bytenr_ret) | |
917 | { | |
918 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
919 | u32 zone_num; | |
920 | ||
d6639b35 NA |
921 | /* |
922 | * For a zoned filesystem on a non-zoned block device, use the same | |
923 | * super block locations as regular filesystem. Doing so, the super | |
924 | * block can always be retrieved and the zoned flag of the volume | |
925 | * detected from the super block information. | |
926 | */ | |
927 | if (!bdev_is_zoned(device->bdev)) { | |
12659251 NA |
928 | *bytenr_ret = btrfs_sb_offset(mirror); |
929 | return 0; | |
930 | } | |
931 | ||
932 | zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); | |
933 | if (zone_num + 1 >= zinfo->nr_zones) | |
934 | return -ENOENT; | |
935 | ||
936 | return sb_log_location(device->bdev, | |
937 | &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror], | |
938 | rw, bytenr_ret); | |
939 | } | |
940 | ||
941 | static inline bool is_sb_log_zone(struct btrfs_zoned_device_info *zinfo, | |
942 | int mirror) | |
943 | { | |
944 | u32 zone_num; | |
945 | ||
946 | if (!zinfo) | |
947 | return false; | |
948 | ||
949 | zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); | |
950 | if (zone_num + 1 >= zinfo->nr_zones) | |
951 | return false; | |
952 | ||
953 | if (!test_bit(zone_num, zinfo->seq_zones)) | |
954 | return false; | |
955 | ||
956 | return true; | |
957 | } | |
958 | ||
8376d9e1 | 959 | int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) |
12659251 NA |
960 | { |
961 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
962 | struct blk_zone *zone; | |
8376d9e1 | 963 | int i; |
12659251 NA |
964 | |
965 | if (!is_sb_log_zone(zinfo, mirror)) | |
8376d9e1 | 966 | return 0; |
12659251 NA |
967 | |
968 | zone = &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror]; | |
8376d9e1 NA |
969 | for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
970 | /* Advance the next zone */ | |
971 | if (zone->cond == BLK_ZONE_COND_FULL) { | |
972 | zone++; | |
973 | continue; | |
974 | } | |
975 | ||
12659251 NA |
976 | if (zone->cond == BLK_ZONE_COND_EMPTY) |
977 | zone->cond = BLK_ZONE_COND_IMP_OPEN; | |
978 | ||
8376d9e1 NA |
979 | zone->wp += SUPER_INFO_SECTORS; |
980 | ||
981 | if (sb_zone_is_full(zone)) { | |
982 | /* | |
983 | * No room left to write new superblock. Since | |
984 | * superblock is written with REQ_SYNC, it is safe to | |
985 | * finish the zone now. | |
986 | * | |
987 | * If the write pointer is exactly at the capacity, | |
988 | * explicit ZONE_FINISH is not necessary. | |
989 | */ | |
990 | if (zone->wp != zone->start + zone->capacity) { | |
991 | int ret; | |
992 | ||
993 | ret = blkdev_zone_mgmt(device->bdev, | |
994 | REQ_OP_ZONE_FINISH, zone->start, | |
995 | zone->len, GFP_NOFS); | |
996 | if (ret) | |
997 | return ret; | |
998 | } | |
12659251 | 999 | |
8376d9e1 | 1000 | zone->wp = zone->start + zone->len; |
12659251 | 1001 | zone->cond = BLK_ZONE_COND_FULL; |
8376d9e1 NA |
1002 | } |
1003 | return 0; | |
12659251 NA |
1004 | } |
1005 | ||
8376d9e1 NA |
1006 | /* All the zones are FULL. Should not reach here. */ |
1007 | ASSERT(0); | |
1008 | return -EIO; | |
12659251 NA |
1009 | } |
1010 | ||
1011 | int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) | |
1012 | { | |
1013 | sector_t zone_sectors; | |
1014 | sector_t nr_sectors; | |
1015 | u8 zone_sectors_shift; | |
1016 | u32 sb_zone; | |
1017 | u32 nr_zones; | |
1018 | ||
1019 | zone_sectors = bdev_zone_sectors(bdev); | |
1020 | zone_sectors_shift = ilog2(zone_sectors); | |
ac7ac461 | 1021 | nr_sectors = bdev_nr_sectors(bdev); |
12659251 NA |
1022 | nr_zones = nr_sectors >> zone_sectors_shift; |
1023 | ||
1024 | sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); | |
1025 | if (sb_zone + 1 >= nr_zones) | |
1026 | return -ENOENT; | |
1027 | ||
1028 | return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, | |
5b434df8 | 1029 | zone_start_sector(sb_zone, bdev), |
12659251 NA |
1030 | zone_sectors * BTRFS_NR_SB_LOG_ZONES, GFP_NOFS); |
1031 | } | |
1cd6121f | 1032 | |
43dd529a DS |
1033 | /* |
1034 | * Find allocatable zones within a given region. | |
1cd6121f NA |
1035 | * |
1036 | * @device: the device to allocate a region on | |
1037 | * @hole_start: the position of the hole to allocate the region | |
1038 | * @num_bytes: size of wanted region | |
1039 | * @hole_end: the end of the hole | |
1040 | * @return: position of allocatable zones | |
1041 | * | |
1042 | * Allocatable region should not contain any superblock locations. | |
1043 | */ | |
1044 | u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, | |
1045 | u64 hole_end, u64 num_bytes) | |
1046 | { | |
1047 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
1048 | const u8 shift = zinfo->zone_size_shift; | |
1049 | u64 nzones = num_bytes >> shift; | |
1050 | u64 pos = hole_start; | |
1051 | u64 begin, end; | |
1052 | bool have_sb; | |
1053 | int i; | |
1054 | ||
1055 | ASSERT(IS_ALIGNED(hole_start, zinfo->zone_size)); | |
1056 | ASSERT(IS_ALIGNED(num_bytes, zinfo->zone_size)); | |
1057 | ||
1058 | while (pos < hole_end) { | |
1059 | begin = pos >> shift; | |
1060 | end = begin + nzones; | |
1061 | ||
1062 | if (end > zinfo->nr_zones) | |
1063 | return hole_end; | |
1064 | ||
1065 | /* Check if zones in the region are all empty */ | |
1066 | if (btrfs_dev_is_sequential(device, pos) && | |
b5345d6c | 1067 | !bitmap_test_range_all_set(zinfo->empty_zones, begin, nzones)) { |
1cd6121f NA |
1068 | pos += zinfo->zone_size; |
1069 | continue; | |
1070 | } | |
1071 | ||
1072 | have_sb = false; | |
1073 | for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { | |
1074 | u32 sb_zone; | |
1075 | u64 sb_pos; | |
1076 | ||
1077 | sb_zone = sb_zone_number(shift, i); | |
1078 | if (!(end <= sb_zone || | |
1079 | sb_zone + BTRFS_NR_SB_LOG_ZONES <= begin)) { | |
1080 | have_sb = true; | |
5b434df8 NA |
1081 | pos = zone_start_physical( |
1082 | sb_zone + BTRFS_NR_SB_LOG_ZONES, zinfo); | |
1cd6121f NA |
1083 | break; |
1084 | } | |
1085 | ||
1086 | /* We also need to exclude regular superblock positions */ | |
1087 | sb_pos = btrfs_sb_offset(i); | |
1088 | if (!(pos + num_bytes <= sb_pos || | |
1089 | sb_pos + BTRFS_SUPER_INFO_SIZE <= pos)) { | |
1090 | have_sb = true; | |
1091 | pos = ALIGN(sb_pos + BTRFS_SUPER_INFO_SIZE, | |
1092 | zinfo->zone_size); | |
1093 | break; | |
1094 | } | |
1095 | } | |
1096 | if (!have_sb) | |
1097 | break; | |
1098 | } | |
1099 | ||
1100 | return pos; | |
1101 | } | |
1102 | ||
afba2bc0 NA |
1103 | static bool btrfs_dev_set_active_zone(struct btrfs_device *device, u64 pos) |
1104 | { | |
1105 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
1106 | unsigned int zno = (pos >> zone_info->zone_size_shift); | |
1107 | ||
1108 | /* We can use any number of zones */ | |
1109 | if (zone_info->max_active_zones == 0) | |
1110 | return true; | |
1111 | ||
1112 | if (!test_bit(zno, zone_info->active_zones)) { | |
1113 | /* Active zone left? */ | |
1114 | if (atomic_dec_if_positive(&zone_info->active_zones_left) < 0) | |
1115 | return false; | |
1116 | if (test_and_set_bit(zno, zone_info->active_zones)) { | |
1117 | /* Someone already set the bit */ | |
1118 | atomic_inc(&zone_info->active_zones_left); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | return true; | |
1123 | } | |
1124 | ||
1125 | static void btrfs_dev_clear_active_zone(struct btrfs_device *device, u64 pos) | |
1126 | { | |
1127 | struct btrfs_zoned_device_info *zone_info = device->zone_info; | |
1128 | unsigned int zno = (pos >> zone_info->zone_size_shift); | |
1129 | ||
1130 | /* We can use any number of zones */ | |
1131 | if (zone_info->max_active_zones == 0) | |
1132 | return; | |
1133 | ||
1134 | if (test_and_clear_bit(zno, zone_info->active_zones)) | |
1135 | atomic_inc(&zone_info->active_zones_left); | |
1136 | } | |
1137 | ||
1cd6121f NA |
1138 | int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, |
1139 | u64 length, u64 *bytes) | |
1140 | { | |
1141 | int ret; | |
1142 | ||
1143 | *bytes = 0; | |
1144 | ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_RESET, | |
1145 | physical >> SECTOR_SHIFT, length >> SECTOR_SHIFT, | |
1146 | GFP_NOFS); | |
1147 | if (ret) | |
1148 | return ret; | |
1149 | ||
1150 | *bytes = length; | |
1151 | while (length) { | |
1152 | btrfs_dev_set_zone_empty(device, physical); | |
afba2bc0 | 1153 | btrfs_dev_clear_active_zone(device, physical); |
1cd6121f NA |
1154 | physical += device->zone_info->zone_size; |
1155 | length -= device->zone_info->zone_size; | |
1156 | } | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size) | |
1162 | { | |
1163 | struct btrfs_zoned_device_info *zinfo = device->zone_info; | |
1164 | const u8 shift = zinfo->zone_size_shift; | |
1165 | unsigned long begin = start >> shift; | |
b5345d6c | 1166 | unsigned long nbits = size >> shift; |
1cd6121f NA |
1167 | u64 pos; |
1168 | int ret; | |
1169 | ||
1170 | ASSERT(IS_ALIGNED(start, zinfo->zone_size)); | |
1171 | ASSERT(IS_ALIGNED(size, zinfo->zone_size)); | |
1172 | ||
b5345d6c | 1173 | if (begin + nbits > zinfo->nr_zones) |
1cd6121f NA |
1174 | return -ERANGE; |
1175 | ||
1176 | /* All the zones are conventional */ | |
b5345d6c | 1177 | if (bitmap_test_range_all_zero(zinfo->seq_zones, begin, nbits)) |
1cd6121f NA |
1178 | return 0; |
1179 | ||
1180 | /* All the zones are sequential and empty */ | |
b5345d6c NA |
1181 | if (bitmap_test_range_all_set(zinfo->seq_zones, begin, nbits) && |
1182 | bitmap_test_range_all_set(zinfo->empty_zones, begin, nbits)) | |
1cd6121f NA |
1183 | return 0; |
1184 | ||
1185 | for (pos = start; pos < start + size; pos += zinfo->zone_size) { | |
1186 | u64 reset_bytes; | |
1187 | ||
1188 | if (!btrfs_dev_is_sequential(device, pos) || | |
1189 | btrfs_dev_is_empty_zone(device, pos)) | |
1190 | continue; | |
1191 | ||
1192 | /* Free regions should be empty */ | |
1193 | btrfs_warn_in_rcu( | |
1194 | device->fs_info, | |
1195 | "zoned: resetting device %s (devid %llu) zone %llu for allocation", | |
1196 | rcu_str_deref(device->name), device->devid, pos >> shift); | |
1197 | WARN_ON_ONCE(1); | |
1198 | ||
1199 | ret = btrfs_reset_device_zone(device, pos, zinfo->zone_size, | |
1200 | &reset_bytes); | |
1201 | if (ret) | |
1202 | return ret; | |
1203 | } | |
1204 | ||
1205 | return 0; | |
1206 | } | |
08e11a3d | 1207 | |
a94794d5 NA |
1208 | /* |
1209 | * Calculate an allocation pointer from the extent allocation information | |
1210 | * for a block group consist of conventional zones. It is pointed to the | |
1211 | * end of the highest addressed extent in the block group as an allocation | |
1212 | * offset. | |
1213 | */ | |
1214 | static int calculate_alloc_pointer(struct btrfs_block_group *cache, | |
6ca64ac2 | 1215 | u64 *offset_ret, bool new) |
a94794d5 NA |
1216 | { |
1217 | struct btrfs_fs_info *fs_info = cache->fs_info; | |
29cbcf40 | 1218 | struct btrfs_root *root; |
a94794d5 NA |
1219 | struct btrfs_path *path; |
1220 | struct btrfs_key key; | |
1221 | struct btrfs_key found_key; | |
1222 | int ret; | |
1223 | u64 length; | |
1224 | ||
6ca64ac2 JT |
1225 | /* |
1226 | * Avoid tree lookups for a new block group, there's no use for it. | |
1227 | * It must always be 0. | |
1228 | * | |
1229 | * Also, we have a lock chain of extent buffer lock -> chunk mutex. | |
1230 | * For new a block group, this function is called from | |
1231 | * btrfs_make_block_group() which is already taking the chunk mutex. | |
1232 | * Thus, we cannot call calculate_alloc_pointer() which takes extent | |
1233 | * buffer locks to avoid deadlock. | |
1234 | */ | |
1235 | if (new) { | |
1236 | *offset_ret = 0; | |
1237 | return 0; | |
1238 | } | |
1239 | ||
a94794d5 NA |
1240 | path = btrfs_alloc_path(); |
1241 | if (!path) | |
1242 | return -ENOMEM; | |
1243 | ||
1244 | key.objectid = cache->start + cache->length; | |
1245 | key.type = 0; | |
1246 | key.offset = 0; | |
1247 | ||
29cbcf40 | 1248 | root = btrfs_extent_root(fs_info, key.objectid); |
a94794d5 NA |
1249 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
1250 | /* We should not find the exact match */ | |
1251 | if (!ret) | |
1252 | ret = -EUCLEAN; | |
1253 | if (ret < 0) | |
1254 | goto out; | |
1255 | ||
1256 | ret = btrfs_previous_extent_item(root, path, cache->start); | |
1257 | if (ret) { | |
1258 | if (ret == 1) { | |
1259 | ret = 0; | |
1260 | *offset_ret = 0; | |
1261 | } | |
1262 | goto out; | |
1263 | } | |
1264 | ||
1265 | btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]); | |
1266 | ||
1267 | if (found_key.type == BTRFS_EXTENT_ITEM_KEY) | |
1268 | length = found_key.offset; | |
1269 | else | |
1270 | length = fs_info->nodesize; | |
1271 | ||
1272 | if (!(found_key.objectid >= cache->start && | |
1273 | found_key.objectid + length <= cache->start + cache->length)) { | |
1274 | ret = -EUCLEAN; | |
1275 | goto out; | |
1276 | } | |
1277 | *offset_ret = found_key.objectid + length - cache->start; | |
1278 | ret = 0; | |
1279 | ||
1280 | out: | |
1281 | btrfs_free_path(path); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
15c12fcc CH |
1285 | struct zone_info { |
1286 | u64 physical; | |
1287 | u64 capacity; | |
1288 | u64 alloc_offset; | |
1289 | }; | |
1290 | ||
09a46725 CH |
1291 | static int btrfs_load_zone_info(struct btrfs_fs_info *fs_info, int zone_idx, |
1292 | struct zone_info *info, unsigned long *active, | |
1293 | struct map_lookup *map) | |
1294 | { | |
1295 | struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; | |
1296 | struct btrfs_device *device = map->stripes[zone_idx].dev; | |
1297 | int dev_replace_is_ongoing = 0; | |
1298 | unsigned int nofs_flag; | |
1299 | struct blk_zone zone; | |
1300 | int ret; | |
1301 | ||
1302 | info->physical = map->stripes[zone_idx].physical; | |
1303 | ||
1304 | if (!device->bdev) { | |
1305 | info->alloc_offset = WP_MISSING_DEV; | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | /* Consider a zone as active if we can allow any number of active zones. */ | |
1310 | if (!device->zone_info->max_active_zones) | |
1311 | __set_bit(zone_idx, active); | |
1312 | ||
1313 | if (!btrfs_dev_is_sequential(device, info->physical)) { | |
1314 | info->alloc_offset = WP_CONVENTIONAL; | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | /* This zone will be used for allocation, so mark this zone non-empty. */ | |
1319 | btrfs_dev_clear_zone_empty(device, info->physical); | |
1320 | ||
1321 | down_read(&dev_replace->rwsem); | |
1322 | dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace); | |
1323 | if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL) | |
1324 | btrfs_dev_clear_zone_empty(dev_replace->tgtdev, info->physical); | |
1325 | up_read(&dev_replace->rwsem); | |
1326 | ||
1327 | /* | |
1328 | * The group is mapped to a sequential zone. Get the zone write pointer | |
1329 | * to determine the allocation offset within the zone. | |
1330 | */ | |
1331 | WARN_ON(!IS_ALIGNED(info->physical, fs_info->zone_size)); | |
1332 | nofs_flag = memalloc_nofs_save(); | |
1333 | ret = btrfs_get_dev_zone(device, info->physical, &zone); | |
1334 | memalloc_nofs_restore(nofs_flag); | |
1335 | if (ret) { | |
1336 | if (ret != -EIO && ret != -EOPNOTSUPP) | |
1337 | return ret; | |
1338 | info->alloc_offset = WP_MISSING_DEV; | |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | if (zone.type == BLK_ZONE_TYPE_CONVENTIONAL) { | |
1343 | btrfs_err_in_rcu(fs_info, | |
1344 | "zoned: unexpected conventional zone %llu on device %s (devid %llu)", | |
1345 | zone.start << SECTOR_SHIFT, rcu_str_deref(device->name), | |
1346 | device->devid); | |
1347 | return -EIO; | |
1348 | } | |
1349 | ||
1350 | info->capacity = (zone.capacity << SECTOR_SHIFT); | |
1351 | ||
1352 | switch (zone.cond) { | |
1353 | case BLK_ZONE_COND_OFFLINE: | |
1354 | case BLK_ZONE_COND_READONLY: | |
1355 | btrfs_err(fs_info, | |
1356 | "zoned: offline/readonly zone %llu on device %s (devid %llu)", | |
1357 | (info->physical >> device->zone_info->zone_size_shift), | |
1358 | rcu_str_deref(device->name), device->devid); | |
1359 | info->alloc_offset = WP_MISSING_DEV; | |
1360 | break; | |
1361 | case BLK_ZONE_COND_EMPTY: | |
1362 | info->alloc_offset = 0; | |
1363 | break; | |
1364 | case BLK_ZONE_COND_FULL: | |
1365 | info->alloc_offset = info->capacity; | |
1366 | break; | |
1367 | default: | |
1368 | /* Partially used zone. */ | |
1369 | info->alloc_offset = ((zone.wp - zone.start) << SECTOR_SHIFT); | |
1370 | __set_bit(zone_idx, active); | |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
9e0e3e74 CH |
1377 | static int btrfs_load_block_group_single(struct btrfs_block_group *bg, |
1378 | struct zone_info *info, | |
1379 | unsigned long *active) | |
1380 | { | |
1381 | if (info->alloc_offset == WP_MISSING_DEV) { | |
1382 | btrfs_err(bg->fs_info, | |
1383 | "zoned: cannot recover write pointer for zone %llu", | |
1384 | info->physical); | |
1385 | return -EIO; | |
1386 | } | |
1387 | ||
1388 | bg->alloc_offset = info->alloc_offset; | |
1389 | bg->zone_capacity = info->capacity; | |
1390 | if (test_bit(0, active)) | |
1391 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &bg->runtime_flags); | |
1392 | return 0; | |
1393 | } | |
1394 | ||
87463f7e CH |
1395 | static int btrfs_load_block_group_dup(struct btrfs_block_group *bg, |
1396 | struct map_lookup *map, | |
1397 | struct zone_info *zone_info, | |
1398 | unsigned long *active) | |
1399 | { | |
568220fa JT |
1400 | struct btrfs_fs_info *fs_info = bg->fs_info; |
1401 | ||
1402 | if ((map->type & BTRFS_BLOCK_GROUP_DATA) && !fs_info->stripe_root) { | |
1403 | btrfs_err(fs_info, "zoned: data DUP profile needs raid-stripe-tree"); | |
87463f7e CH |
1404 | return -EINVAL; |
1405 | } | |
1406 | ||
1407 | if (zone_info[0].alloc_offset == WP_MISSING_DEV) { | |
1408 | btrfs_err(bg->fs_info, | |
1409 | "zoned: cannot recover write pointer for zone %llu", | |
1410 | zone_info[0].physical); | |
1411 | return -EIO; | |
1412 | } | |
1413 | if (zone_info[1].alloc_offset == WP_MISSING_DEV) { | |
1414 | btrfs_err(bg->fs_info, | |
1415 | "zoned: cannot recover write pointer for zone %llu", | |
1416 | zone_info[1].physical); | |
1417 | return -EIO; | |
1418 | } | |
1419 | if (zone_info[0].alloc_offset != zone_info[1].alloc_offset) { | |
1420 | btrfs_err(bg->fs_info, | |
1421 | "zoned: write pointer offset mismatch of zones in DUP profile"); | |
1422 | return -EIO; | |
1423 | } | |
1424 | ||
1425 | if (test_bit(0, active) != test_bit(1, active)) { | |
1426 | if (!btrfs_zone_activate(bg)) | |
1427 | return -EIO; | |
1428 | } else if (test_bit(0, active)) { | |
1429 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &bg->runtime_flags); | |
1430 | } | |
1431 | ||
1432 | bg->alloc_offset = zone_info[0].alloc_offset; | |
1433 | bg->zone_capacity = min(zone_info[0].capacity, zone_info[1].capacity); | |
1434 | return 0; | |
1435 | } | |
1436 | ||
568220fa JT |
1437 | static int btrfs_load_block_group_raid1(struct btrfs_block_group *bg, |
1438 | struct map_lookup *map, | |
1439 | struct zone_info *zone_info, | |
1440 | unsigned long *active) | |
1441 | { | |
1442 | struct btrfs_fs_info *fs_info = bg->fs_info; | |
1443 | int i; | |
1444 | ||
1445 | if ((map->type & BTRFS_BLOCK_GROUP_DATA) && !fs_info->stripe_root) { | |
1446 | btrfs_err(fs_info, "zoned: data %s needs raid-stripe-tree", | |
1447 | btrfs_bg_type_to_raid_name(map->type)); | |
1448 | return -EINVAL; | |
1449 | } | |
1450 | ||
1451 | for (i = 0; i < map->num_stripes; i++) { | |
1452 | if (zone_info[i].alloc_offset == WP_MISSING_DEV || | |
1453 | zone_info[i].alloc_offset == WP_CONVENTIONAL) | |
1454 | continue; | |
1455 | ||
1456 | if ((zone_info[0].alloc_offset != zone_info[i].alloc_offset) && | |
1457 | !btrfs_test_opt(fs_info, DEGRADED)) { | |
1458 | btrfs_err(fs_info, | |
1459 | "zoned: write pointer offset mismatch of zones in %s profile", | |
1460 | btrfs_bg_type_to_raid_name(map->type)); | |
1461 | return -EIO; | |
1462 | } | |
1463 | if (test_bit(0, active) != test_bit(i, active)) { | |
1464 | if (!btrfs_test_opt(fs_info, DEGRADED) && | |
1465 | !btrfs_zone_activate(bg)) { | |
1466 | return -EIO; | |
1467 | } | |
1468 | } else { | |
1469 | if (test_bit(0, active)) | |
1470 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &bg->runtime_flags); | |
1471 | } | |
1472 | /* In case a device is missing we have a cap of 0, so don't use it. */ | |
1473 | bg->zone_capacity = min_not_zero(zone_info[0].capacity, | |
1474 | zone_info[1].capacity); | |
1475 | } | |
1476 | ||
1477 | if (zone_info[0].alloc_offset != WP_MISSING_DEV) | |
1478 | bg->alloc_offset = zone_info[0].alloc_offset; | |
1479 | else | |
1480 | bg->alloc_offset = zone_info[i - 1].alloc_offset; | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | static int btrfs_load_block_group_raid0(struct btrfs_block_group *bg, | |
1486 | struct map_lookup *map, | |
1487 | struct zone_info *zone_info, | |
1488 | unsigned long *active) | |
1489 | { | |
1490 | struct btrfs_fs_info *fs_info = bg->fs_info; | |
1491 | ||
1492 | if ((map->type & BTRFS_BLOCK_GROUP_DATA) && !fs_info->stripe_root) { | |
1493 | btrfs_err(fs_info, "zoned: data %s needs raid-stripe-tree", | |
1494 | btrfs_bg_type_to_raid_name(map->type)); | |
1495 | return -EINVAL; | |
1496 | } | |
1497 | ||
1498 | for (int i = 0; i < map->num_stripes; i++) { | |
1499 | if (zone_info[i].alloc_offset == WP_MISSING_DEV || | |
1500 | zone_info[i].alloc_offset == WP_CONVENTIONAL) | |
1501 | continue; | |
1502 | ||
1503 | if (test_bit(0, active) != test_bit(i, active)) { | |
1504 | if (!btrfs_zone_activate(bg)) | |
1505 | return -EIO; | |
1506 | } else { | |
1507 | if (test_bit(0, active)) | |
1508 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &bg->runtime_flags); | |
1509 | } | |
1510 | bg->zone_capacity += zone_info[i].capacity; | |
1511 | bg->alloc_offset += zone_info[i].alloc_offset; | |
1512 | } | |
1513 | ||
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | static int btrfs_load_block_group_raid10(struct btrfs_block_group *bg, | |
1518 | struct map_lookup *map, | |
1519 | struct zone_info *zone_info, | |
1520 | unsigned long *active) | |
1521 | { | |
1522 | struct btrfs_fs_info *fs_info = bg->fs_info; | |
1523 | ||
1524 | if ((map->type & BTRFS_BLOCK_GROUP_DATA) && !fs_info->stripe_root) { | |
1525 | btrfs_err(fs_info, "zoned: data %s needs raid-stripe-tree", | |
1526 | btrfs_bg_type_to_raid_name(map->type)); | |
1527 | return -EINVAL; | |
1528 | } | |
1529 | ||
1530 | for (int i = 0; i < map->num_stripes; i++) { | |
1531 | if (zone_info[i].alloc_offset == WP_MISSING_DEV || | |
1532 | zone_info[i].alloc_offset == WP_CONVENTIONAL) | |
1533 | continue; | |
1534 | ||
1535 | if (test_bit(0, active) != test_bit(i, active)) { | |
1536 | if (!btrfs_zone_activate(bg)) | |
1537 | return -EIO; | |
1538 | } else { | |
1539 | if (test_bit(0, active)) | |
1540 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &bg->runtime_flags); | |
1541 | } | |
1542 | ||
1543 | if ((i % map->sub_stripes) == 0) { | |
1544 | bg->zone_capacity += zone_info[i].capacity; | |
1545 | bg->alloc_offset += zone_info[i].alloc_offset; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | return 0; | |
1550 | } | |
1551 | ||
a94794d5 | 1552 | int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new) |
08e11a3d NA |
1553 | { |
1554 | struct btrfs_fs_info *fs_info = cache->fs_info; | |
1555 | struct extent_map_tree *em_tree = &fs_info->mapping_tree; | |
1556 | struct extent_map *em; | |
1557 | struct map_lookup *map; | |
08e11a3d NA |
1558 | u64 logical = cache->start; |
1559 | u64 length = cache->length; | |
15c12fcc | 1560 | struct zone_info *zone_info = NULL; |
08e11a3d NA |
1561 | int ret; |
1562 | int i; | |
68a384b5 | 1563 | unsigned long *active = NULL; |
a94794d5 | 1564 | u64 last_alloc = 0; |
08e11a3d NA |
1565 | u32 num_sequential = 0, num_conventional = 0; |
1566 | ||
1567 | if (!btrfs_is_zoned(fs_info)) | |
1568 | return 0; | |
1569 | ||
1570 | /* Sanity check */ | |
1571 | if (!IS_ALIGNED(length, fs_info->zone_size)) { | |
1572 | btrfs_err(fs_info, | |
1573 | "zoned: block group %llu len %llu unaligned to zone size %llu", | |
1574 | logical, length, fs_info->zone_size); | |
1575 | return -EIO; | |
1576 | } | |
1577 | ||
1578 | /* Get the chunk mapping */ | |
1579 | read_lock(&em_tree->lock); | |
1580 | em = lookup_extent_mapping(em_tree, logical, length); | |
1581 | read_unlock(&em_tree->lock); | |
1582 | ||
1583 | if (!em) | |
1584 | return -EINVAL; | |
1585 | ||
1586 | map = em->map_lookup; | |
1587 | ||
64259baa | 1588 | cache->physical_map = kmemdup(map, map_lookup_size(map->num_stripes), GFP_NOFS); |
dafc340d NA |
1589 | if (!cache->physical_map) { |
1590 | ret = -ENOMEM; | |
1591 | goto out; | |
1592 | } | |
1593 | ||
15c12fcc CH |
1594 | zone_info = kcalloc(map->num_stripes, sizeof(*zone_info), GFP_NOFS); |
1595 | if (!zone_info) { | |
dbfcc18f JT |
1596 | ret = -ENOMEM; |
1597 | goto out; | |
1598 | } | |
1599 | ||
68a384b5 NA |
1600 | active = bitmap_zalloc(map->num_stripes, GFP_NOFS); |
1601 | if (!active) { | |
1602 | ret = -ENOMEM; | |
1603 | goto out; | |
1604 | } | |
1605 | ||
08e11a3d | 1606 | for (i = 0; i < map->num_stripes; i++) { |
09a46725 CH |
1607 | ret = btrfs_load_zone_info(fs_info, i, &zone_info[i], active, map); |
1608 | if (ret) | |
784daf2b | 1609 | goto out; |
8eae532b | 1610 | |
09a46725 CH |
1611 | if (zone_info[i].alloc_offset == WP_CONVENTIONAL) |
1612 | num_conventional++; | |
1613 | else | |
1614 | num_sequential++; | |
08e11a3d NA |
1615 | } |
1616 | ||
08f45559 | 1617 | if (num_sequential > 0) |
961f5b8b | 1618 | set_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags); |
08f45559 | 1619 | |
08e11a3d | 1620 | if (num_conventional > 0) { |
8eae532b NA |
1621 | /* Zone capacity is always zone size in emulation */ |
1622 | cache->zone_capacity = cache->length; | |
6ca64ac2 JT |
1623 | ret = calculate_alloc_pointer(cache, &last_alloc, new); |
1624 | if (ret) { | |
1625 | btrfs_err(fs_info, | |
a94794d5 | 1626 | "zoned: failed to determine allocation offset of bg %llu", |
6ca64ac2 JT |
1627 | cache->start); |
1628 | goto out; | |
1629 | } else if (map->num_stripes == num_conventional) { | |
1630 | cache->alloc_offset = last_alloc; | |
3349b57f | 1631 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags); |
a94794d5 NA |
1632 | goto out; |
1633 | } | |
08e11a3d NA |
1634 | } |
1635 | ||
1636 | switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) { | |
1637 | case 0: /* single */ | |
9e0e3e74 | 1638 | ret = btrfs_load_block_group_single(cache, &zone_info[0], active); |
08e11a3d NA |
1639 | break; |
1640 | case BTRFS_BLOCK_GROUP_DUP: | |
87463f7e | 1641 | ret = btrfs_load_block_group_dup(cache, map, zone_info, active); |
265f7237 | 1642 | break; |
08e11a3d | 1643 | case BTRFS_BLOCK_GROUP_RAID1: |
568220fa JT |
1644 | case BTRFS_BLOCK_GROUP_RAID1C3: |
1645 | case BTRFS_BLOCK_GROUP_RAID1C4: | |
1646 | ret = btrfs_load_block_group_raid1(cache, map, zone_info, active); | |
1647 | break; | |
08e11a3d | 1648 | case BTRFS_BLOCK_GROUP_RAID0: |
568220fa JT |
1649 | ret = btrfs_load_block_group_raid0(cache, map, zone_info, active); |
1650 | break; | |
08e11a3d | 1651 | case BTRFS_BLOCK_GROUP_RAID10: |
568220fa JT |
1652 | ret = btrfs_load_block_group_raid10(cache, map, zone_info, active); |
1653 | break; | |
08e11a3d NA |
1654 | case BTRFS_BLOCK_GROUP_RAID5: |
1655 | case BTRFS_BLOCK_GROUP_RAID6: | |
08e11a3d NA |
1656 | default: |
1657 | btrfs_err(fs_info, "zoned: profile %s not yet supported", | |
1658 | btrfs_bg_type_to_raid_name(map->type)); | |
1659 | ret = -EINVAL; | |
1660 | goto out; | |
1661 | } | |
1662 | ||
1663 | out: | |
8eae532b NA |
1664 | if (cache->alloc_offset > cache->zone_capacity) { |
1665 | btrfs_err(fs_info, | |
1666 | "zoned: invalid write pointer %llu (larger than zone capacity %llu) in block group %llu", | |
1667 | cache->alloc_offset, cache->zone_capacity, | |
1668 | cache->start); | |
1669 | ret = -EIO; | |
1670 | } | |
1671 | ||
a94794d5 NA |
1672 | /* An extent is allocated after the write pointer */ |
1673 | if (!ret && num_conventional && last_alloc > cache->alloc_offset) { | |
1674 | btrfs_err(fs_info, | |
1675 | "zoned: got wrong write pointer in BG %llu: %llu > %llu", | |
1676 | logical, last_alloc, cache->alloc_offset); | |
1677 | ret = -EIO; | |
1678 | } | |
1679 | ||
6ca64ac2 | 1680 | if (!ret) { |
0bc09ca1 | 1681 | cache->meta_write_pointer = cache->alloc_offset + cache->start; |
3349b57f | 1682 | if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags)) { |
6ca64ac2 JT |
1683 | btrfs_get_block_group(cache); |
1684 | spin_lock(&fs_info->zone_active_bgs_lock); | |
1685 | list_add_tail(&cache->active_bg_list, | |
1686 | &fs_info->zone_active_bgs); | |
1687 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
1688 | } | |
1689 | } else { | |
dafc340d NA |
1690 | kfree(cache->physical_map); |
1691 | cache->physical_map = NULL; | |
1692 | } | |
68a384b5 | 1693 | bitmap_free(active); |
15c12fcc | 1694 | kfree(zone_info); |
08e11a3d NA |
1695 | free_extent_map(em); |
1696 | ||
1697 | return ret; | |
1698 | } | |
169e0da9 NA |
1699 | |
1700 | void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) | |
1701 | { | |
1702 | u64 unusable, free; | |
1703 | ||
1704 | if (!btrfs_is_zoned(cache->fs_info)) | |
1705 | return; | |
1706 | ||
1707 | WARN_ON(cache->bytes_super != 0); | |
6a8ebc77 NA |
1708 | unusable = (cache->alloc_offset - cache->used) + |
1709 | (cache->length - cache->zone_capacity); | |
1710 | free = cache->zone_capacity - cache->alloc_offset; | |
169e0da9 NA |
1711 | |
1712 | /* We only need ->free_space in ALLOC_SEQ block groups */ | |
169e0da9 NA |
1713 | cache->cached = BTRFS_CACHE_FINISHED; |
1714 | cache->free_space_ctl->free_space = free; | |
1715 | cache->zone_unusable = unusable; | |
169e0da9 | 1716 | } |
d3575156 NA |
1717 | |
1718 | void btrfs_redirty_list_add(struct btrfs_transaction *trans, | |
1719 | struct extent_buffer *eb) | |
1720 | { | |
f880fe6e CH |
1721 | if (!btrfs_is_zoned(eb->fs_info) || |
1722 | btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)) | |
d3575156 NA |
1723 | return; |
1724 | ||
f880fe6e CH |
1725 | ASSERT(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); |
1726 | ||
c83b56d1 CH |
1727 | memzero_extent_buffer(eb, 0, eb->len); |
1728 | set_bit(EXTENT_BUFFER_NO_CHECK, &eb->bflags); | |
d3575156 | 1729 | set_extent_buffer_dirty(eb); |
e85de967 | 1730 | set_extent_bit(&trans->dirty_pages, eb->start, eb->start + eb->len - 1, |
1c94674b | 1731 | EXTENT_DIRTY, NULL); |
d3575156 | 1732 | } |
08f45559 | 1733 | |
921603c7 | 1734 | bool btrfs_use_zone_append(struct btrfs_bio *bbio) |
08f45559 | 1735 | { |
921603c7 CH |
1736 | u64 start = (bbio->bio.bi_iter.bi_sector << SECTOR_SHIFT); |
1737 | struct btrfs_inode *inode = bbio->inode; | |
4317ff00 | 1738 | struct btrfs_fs_info *fs_info = bbio->fs_info; |
08f45559 JT |
1739 | struct btrfs_block_group *cache; |
1740 | bool ret = false; | |
1741 | ||
1742 | if (!btrfs_is_zoned(fs_info)) | |
1743 | return false; | |
1744 | ||
4317ff00 | 1745 | if (!inode || !is_data_inode(&inode->vfs_inode)) |
08f45559 JT |
1746 | return false; |
1747 | ||
fdf9a37d CH |
1748 | if (btrfs_op(&bbio->bio) != BTRFS_MAP_WRITE) |
1749 | return false; | |
1750 | ||
e6d261e3 JT |
1751 | /* |
1752 | * Using REQ_OP_ZONE_APPNED for relocation can break assumptions on the | |
1753 | * extent layout the relocation code has. | |
1754 | * Furthermore we have set aside own block-group from which only the | |
1755 | * relocation "process" can allocate and make sure only one process at a | |
1756 | * time can add pages to an extent that gets relocated, so it's safe to | |
1757 | * use regular REQ_OP_WRITE for this special case. | |
1758 | */ | |
1759 | if (btrfs_is_data_reloc_root(inode->root)) | |
1760 | return false; | |
1761 | ||
e380adfc | 1762 | cache = btrfs_lookup_block_group(fs_info, start); |
08f45559 JT |
1763 | ASSERT(cache); |
1764 | if (!cache) | |
1765 | return false; | |
1766 | ||
961f5b8b | 1767 | ret = !!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags); |
08f45559 JT |
1768 | btrfs_put_block_group(cache); |
1769 | ||
1770 | return ret; | |
1771 | } | |
d8e3fb10 | 1772 | |
69ccf3f4 | 1773 | void btrfs_record_physical_zoned(struct btrfs_bio *bbio) |
d8e3fb10 | 1774 | { |
69ccf3f4 | 1775 | const u64 physical = bbio->bio.bi_iter.bi_sector << SECTOR_SHIFT; |
cbfce4c7 | 1776 | struct btrfs_ordered_sum *sum = bbio->sums; |
d8e3fb10 | 1777 | |
cbfce4c7 CH |
1778 | if (physical < bbio->orig_physical) |
1779 | sum->logical -= bbio->orig_physical - physical; | |
1780 | else | |
1781 | sum->logical += physical - bbio->orig_physical; | |
d8e3fb10 NA |
1782 | } |
1783 | ||
71df088c CH |
1784 | static void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered, |
1785 | u64 logical) | |
d8e3fb10 | 1786 | { |
71df088c | 1787 | struct extent_map_tree *em_tree = &BTRFS_I(ordered->inode)->extent_tree; |
d8e3fb10 | 1788 | struct extent_map *em; |
d8e3fb10 | 1789 | |
04f0847c | 1790 | ordered->disk_bytenr = logical; |
d8e3fb10 | 1791 | |
d8e3fb10 NA |
1792 | write_lock(&em_tree->lock); |
1793 | em = search_extent_mapping(em_tree, ordered->file_offset, | |
1794 | ordered->num_bytes); | |
04f0847c | 1795 | em->block_start = logical; |
d8e3fb10 NA |
1796 | free_extent_map(em); |
1797 | write_unlock(&em_tree->lock); | |
71df088c CH |
1798 | } |
1799 | ||
1800 | static bool btrfs_zoned_split_ordered(struct btrfs_ordered_extent *ordered, | |
1801 | u64 logical, u64 len) | |
1802 | { | |
1803 | struct btrfs_ordered_extent *new; | |
1804 | ||
1805 | if (!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) && | |
1806 | split_extent_map(BTRFS_I(ordered->inode), ordered->file_offset, | |
f000bc6f | 1807 | ordered->num_bytes, len, logical)) |
71df088c CH |
1808 | return false; |
1809 | ||
1810 | new = btrfs_split_ordered_extent(ordered, len); | |
1811 | if (IS_ERR(new)) | |
1812 | return false; | |
f000bc6f | 1813 | new->disk_bytenr = logical; |
71df088c CH |
1814 | btrfs_finish_one_ordered(new); |
1815 | return true; | |
1816 | } | |
1817 | ||
1818 | void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered) | |
1819 | { | |
1820 | struct btrfs_inode *inode = BTRFS_I(ordered->inode); | |
1821 | struct btrfs_fs_info *fs_info = inode->root->fs_info; | |
c02d35d8 NA |
1822 | struct btrfs_ordered_sum *sum; |
1823 | u64 logical, len; | |
1824 | ||
1825 | /* | |
1826 | * Write to pre-allocated region is for the data relocation, and so | |
1827 | * it should use WRITE operation. No split/rewrite are necessary. | |
1828 | */ | |
1829 | if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags)) | |
1830 | return; | |
1831 | ||
1832 | ASSERT(!list_empty(&ordered->list)); | |
1833 | /* The ordered->list can be empty in the above pre-alloc case. */ | |
1834 | sum = list_first_entry(&ordered->list, struct btrfs_ordered_sum, list); | |
1835 | logical = sum->logical; | |
1836 | len = sum->len; | |
71df088c CH |
1837 | |
1838 | while (len < ordered->disk_num_bytes) { | |
1839 | sum = list_next_entry(sum, list); | |
1840 | if (sum->logical == logical + len) { | |
1841 | len += sum->len; | |
1842 | continue; | |
1843 | } | |
1844 | if (!btrfs_zoned_split_ordered(ordered, logical, len)) { | |
1845 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); | |
1846 | btrfs_err(fs_info, "failed to split ordered extent"); | |
1847 | goto out; | |
1848 | } | |
1849 | logical = sum->logical; | |
1850 | len = sum->len; | |
1851 | } | |
1852 | ||
1853 | if (ordered->disk_bytenr != logical) | |
1854 | btrfs_rewrite_logical_zoned(ordered, logical); | |
d8e3fb10 | 1855 | |
cbfce4c7 CH |
1856 | out: |
1857 | /* | |
1858 | * If we end up here for nodatasum I/O, the btrfs_ordered_sum structures | |
1859 | * were allocated by btrfs_alloc_dummy_sum only to record the logical | |
1860 | * addresses and don't contain actual checksums. We thus must free them | |
1861 | * here so that we don't attempt to log the csums later. | |
1862 | */ | |
1863 | if ((inode->flags & BTRFS_INODE_NODATASUM) || | |
71df088c CH |
1864 | test_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state)) { |
1865 | while ((sum = list_first_entry_or_null(&ordered->list, | |
1866 | typeof(*sum), list))) { | |
1867 | list_del(&sum->list); | |
1868 | kfree(sum); | |
1869 | } | |
d8e3fb10 | 1870 | } |
d8e3fb10 | 1871 | } |
0bc09ca1 | 1872 | |
13bb483d NA |
1873 | static bool check_bg_is_active(struct btrfs_eb_write_context *ctx, |
1874 | struct btrfs_block_group **active_bg) | |
1875 | { | |
1876 | const struct writeback_control *wbc = ctx->wbc; | |
1877 | struct btrfs_block_group *block_group = ctx->zoned_bg; | |
1878 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
1879 | ||
1880 | if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) | |
1881 | return true; | |
1882 | ||
1883 | if (fs_info->treelog_bg == block_group->start) { | |
1884 | if (!btrfs_zone_activate(block_group)) { | |
1885 | int ret_fin = btrfs_zone_finish_one_bg(fs_info); | |
1886 | ||
1887 | if (ret_fin != 1 || !btrfs_zone_activate(block_group)) | |
1888 | return false; | |
1889 | } | |
1890 | } else if (*active_bg != block_group) { | |
1891 | struct btrfs_block_group *tgt = *active_bg; | |
1892 | ||
1893 | /* zoned_meta_io_lock protects fs_info->active_{meta,system}_bg. */ | |
1894 | lockdep_assert_held(&fs_info->zoned_meta_io_lock); | |
1895 | ||
1896 | if (tgt) { | |
1897 | /* | |
1898 | * If there is an unsent IO left in the allocated area, | |
1899 | * we cannot wait for them as it may cause a deadlock. | |
1900 | */ | |
1901 | if (tgt->meta_write_pointer < tgt->start + tgt->alloc_offset) { | |
1902 | if (wbc->sync_mode == WB_SYNC_NONE || | |
1903 | (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)) | |
1904 | return false; | |
1905 | } | |
1906 | ||
1907 | /* Pivot active metadata/system block group. */ | |
1908 | btrfs_zoned_meta_io_unlock(fs_info); | |
1909 | wait_eb_writebacks(tgt); | |
1910 | do_zone_finish(tgt, true); | |
1911 | btrfs_zoned_meta_io_lock(fs_info); | |
1912 | if (*active_bg == tgt) { | |
1913 | btrfs_put_block_group(tgt); | |
1914 | *active_bg = NULL; | |
1915 | } | |
1916 | } | |
1917 | if (!btrfs_zone_activate(block_group)) | |
1918 | return false; | |
1919 | if (*active_bg != block_group) { | |
1920 | ASSERT(*active_bg == NULL); | |
1921 | *active_bg = block_group; | |
1922 | btrfs_get_block_group(block_group); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | return true; | |
1927 | } | |
1928 | ||
2ad8c051 NA |
1929 | /* |
1930 | * Check if @ctx->eb is aligned to the write pointer. | |
1931 | * | |
1932 | * Return: | |
1933 | * 0: @ctx->eb is at the write pointer. You can write it. | |
1934 | * -EAGAIN: There is a hole. The caller should handle the case. | |
1935 | * -EBUSY: There is a hole, but the caller can just bail out. | |
1936 | */ | |
1937 | int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, | |
1938 | struct btrfs_eb_write_context *ctx) | |
0bc09ca1 | 1939 | { |
2ad8c051 | 1940 | const struct writeback_control *wbc = ctx->wbc; |
7db94301 NA |
1941 | const struct extent_buffer *eb = ctx->eb; |
1942 | struct btrfs_block_group *block_group = ctx->zoned_bg; | |
0bc09ca1 NA |
1943 | |
1944 | if (!btrfs_is_zoned(fs_info)) | |
2ad8c051 | 1945 | return 0; |
0bc09ca1 | 1946 | |
7db94301 NA |
1947 | if (block_group) { |
1948 | if (block_group->start > eb->start || | |
1949 | block_group->start + block_group->length <= eb->start) { | |
1950 | btrfs_put_block_group(block_group); | |
1951 | block_group = NULL; | |
1952 | ctx->zoned_bg = NULL; | |
1953 | } | |
1954 | } | |
0bc09ca1 | 1955 | |
7db94301 NA |
1956 | if (!block_group) { |
1957 | block_group = btrfs_lookup_block_group(fs_info, eb->start); | |
1958 | if (!block_group) | |
2ad8c051 | 1959 | return 0; |
7db94301 | 1960 | ctx->zoned_bg = block_group; |
0bc09ca1 NA |
1961 | } |
1962 | ||
13bb483d NA |
1963 | if (block_group->meta_write_pointer == eb->start) { |
1964 | struct btrfs_block_group **tgt; | |
1965 | ||
1966 | if (!test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags)) | |
1967 | return 0; | |
1968 | ||
1969 | if (block_group->flags & BTRFS_BLOCK_GROUP_SYSTEM) | |
1970 | tgt = &fs_info->active_system_bg; | |
1971 | else | |
1972 | tgt = &fs_info->active_meta_bg; | |
1973 | if (check_bg_is_active(ctx, tgt)) | |
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | * Since we may release fs_info->zoned_meta_io_lock, someone can already | |
1979 | * start writing this eb. In that case, we can just bail out. | |
1980 | */ | |
1981 | if (block_group->meta_write_pointer > eb->start) | |
1982 | return -EBUSY; | |
2ad8c051 NA |
1983 | |
1984 | /* If for_sync, this hole will be filled with trasnsaction commit. */ | |
1985 | if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync) | |
1986 | return -EAGAIN; | |
1987 | return -EBUSY; | |
0bc09ca1 NA |
1988 | } |
1989 | ||
de17addc NA |
1990 | int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length) |
1991 | { | |
1992 | if (!btrfs_dev_is_sequential(device, physical)) | |
1993 | return -EOPNOTSUPP; | |
1994 | ||
1995 | return blkdev_issue_zeroout(device->bdev, physical >> SECTOR_SHIFT, | |
1996 | length >> SECTOR_SHIFT, GFP_NOFS, 0); | |
1997 | } | |
7db1c5d1 NA |
1998 | |
1999 | static int read_zone_info(struct btrfs_fs_info *fs_info, u64 logical, | |
2000 | struct blk_zone *zone) | |
2001 | { | |
4c664611 | 2002 | struct btrfs_io_context *bioc = NULL; |
7db1c5d1 NA |
2003 | u64 mapped_length = PAGE_SIZE; |
2004 | unsigned int nofs_flag; | |
2005 | int nmirrors; | |
2006 | int i, ret; | |
2007 | ||
723b8bb1 | 2008 | ret = btrfs_map_block(fs_info, BTRFS_MAP_GET_READ_MIRRORS, logical, |
9fb2acc2 | 2009 | &mapped_length, &bioc, NULL, NULL); |
4c664611 | 2010 | if (ret || !bioc || mapped_length < PAGE_SIZE) { |
29634578 CH |
2011 | ret = -EIO; |
2012 | goto out_put_bioc; | |
7db1c5d1 NA |
2013 | } |
2014 | ||
29634578 CH |
2015 | if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) { |
2016 | ret = -EINVAL; | |
2017 | goto out_put_bioc; | |
2018 | } | |
7db1c5d1 NA |
2019 | |
2020 | nofs_flag = memalloc_nofs_save(); | |
4c664611 | 2021 | nmirrors = (int)bioc->num_stripes; |
7db1c5d1 | 2022 | for (i = 0; i < nmirrors; i++) { |
4c664611 QW |
2023 | u64 physical = bioc->stripes[i].physical; |
2024 | struct btrfs_device *dev = bioc->stripes[i].dev; | |
7db1c5d1 NA |
2025 | |
2026 | /* Missing device */ | |
2027 | if (!dev->bdev) | |
2028 | continue; | |
2029 | ||
2030 | ret = btrfs_get_dev_zone(dev, physical, zone); | |
2031 | /* Failing device */ | |
2032 | if (ret == -EIO || ret == -EOPNOTSUPP) | |
2033 | continue; | |
2034 | break; | |
2035 | } | |
2036 | memalloc_nofs_restore(nofs_flag); | |
29634578 CH |
2037 | out_put_bioc: |
2038 | btrfs_put_bioc(bioc); | |
7db1c5d1 NA |
2039 | return ret; |
2040 | } | |
2041 | ||
2042 | /* | |
2043 | * Synchronize write pointer in a zone at @physical_start on @tgt_dev, by | |
2044 | * filling zeros between @physical_pos to a write pointer of dev-replace | |
2045 | * source device. | |
2046 | */ | |
2047 | int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, | |
2048 | u64 physical_start, u64 physical_pos) | |
2049 | { | |
2050 | struct btrfs_fs_info *fs_info = tgt_dev->fs_info; | |
2051 | struct blk_zone zone; | |
2052 | u64 length; | |
2053 | u64 wp; | |
2054 | int ret; | |
2055 | ||
2056 | if (!btrfs_dev_is_sequential(tgt_dev, physical_pos)) | |
2057 | return 0; | |
2058 | ||
2059 | ret = read_zone_info(fs_info, logical, &zone); | |
2060 | if (ret) | |
2061 | return ret; | |
2062 | ||
2063 | wp = physical_start + ((zone.wp - zone.start) << SECTOR_SHIFT); | |
2064 | ||
2065 | if (physical_pos == wp) | |
2066 | return 0; | |
2067 | ||
2068 | if (physical_pos > wp) | |
2069 | return -EUCLEAN; | |
2070 | ||
2071 | length = wp - physical_pos; | |
2072 | return btrfs_zoned_issue_zeroout(tgt_dev, physical_pos, length); | |
2073 | } | |
e7ff9e6b | 2074 | |
43dd529a | 2075 | /* |
afba2bc0 NA |
2076 | * Activate block group and underlying device zones |
2077 | * | |
2078 | * @block_group: the block group to activate | |
2079 | * | |
2080 | * Return: true on success, false otherwise | |
2081 | */ | |
2082 | bool btrfs_zone_activate(struct btrfs_block_group *block_group) | |
2083 | { | |
2084 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
2085 | struct map_lookup *map; | |
2086 | struct btrfs_device *device; | |
2087 | u64 physical; | |
a7e1ac7b | 2088 | const bool is_data = (block_group->flags & BTRFS_BLOCK_GROUP_DATA); |
afba2bc0 | 2089 | bool ret; |
f9a912a3 | 2090 | int i; |
afba2bc0 NA |
2091 | |
2092 | if (!btrfs_is_zoned(block_group->fs_info)) | |
2093 | return true; | |
2094 | ||
2095 | map = block_group->physical_map; | |
afba2bc0 NA |
2096 | |
2097 | spin_lock(&block_group->lock); | |
3349b57f | 2098 | if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) { |
afba2bc0 NA |
2099 | ret = true; |
2100 | goto out_unlock; | |
2101 | } | |
2102 | ||
54957712 | 2103 | /* No space left */ |
1bfd4767 | 2104 | if (btrfs_zoned_bg_is_full(block_group)) { |
54957712 NA |
2105 | ret = false; |
2106 | goto out_unlock; | |
2107 | } | |
2108 | ||
a7e1ac7b | 2109 | spin_lock(&fs_info->zone_active_bgs_lock); |
f9a912a3 | 2110 | for (i = 0; i < map->num_stripes; i++) { |
a7e1ac7b NA |
2111 | struct btrfs_zoned_device_info *zinfo; |
2112 | int reserved = 0; | |
2113 | ||
f9a912a3 JT |
2114 | device = map->stripes[i].dev; |
2115 | physical = map->stripes[i].physical; | |
a7e1ac7b | 2116 | zinfo = device->zone_info; |
afba2bc0 | 2117 | |
a7e1ac7b | 2118 | if (zinfo->max_active_zones == 0) |
f9a912a3 JT |
2119 | continue; |
2120 | ||
a7e1ac7b NA |
2121 | if (is_data) |
2122 | reserved = zinfo->reserved_active_zones; | |
2123 | /* | |
2124 | * For the data block group, leave active zones for one | |
2125 | * metadata block group and one system block group. | |
2126 | */ | |
2127 | if (atomic_read(&zinfo->active_zones_left) <= reserved) { | |
2128 | ret = false; | |
2129 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2130 | goto out_unlock; | |
2131 | } | |
2132 | ||
f9a912a3 JT |
2133 | if (!btrfs_dev_set_active_zone(device, physical)) { |
2134 | /* Cannot activate the zone */ | |
2135 | ret = false; | |
a7e1ac7b | 2136 | spin_unlock(&fs_info->zone_active_bgs_lock); |
f9a912a3 JT |
2137 | goto out_unlock; |
2138 | } | |
a7e1ac7b NA |
2139 | if (!is_data) |
2140 | zinfo->reserved_active_zones--; | |
f9a912a3 | 2141 | } |
a7e1ac7b | 2142 | spin_unlock(&fs_info->zone_active_bgs_lock); |
ceb4f608 NA |
2143 | |
2144 | /* Successfully activated all the zones */ | |
3349b57f | 2145 | set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags); |
afba2bc0 NA |
2146 | spin_unlock(&block_group->lock); |
2147 | ||
ceb4f608 NA |
2148 | /* For the active block group list */ |
2149 | btrfs_get_block_group(block_group); | |
afba2bc0 | 2150 | |
ceb4f608 NA |
2151 | spin_lock(&fs_info->zone_active_bgs_lock); |
2152 | list_add_tail(&block_group->active_bg_list, &fs_info->zone_active_bgs); | |
2153 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
afba2bc0 NA |
2154 | |
2155 | return true; | |
2156 | ||
2157 | out_unlock: | |
2158 | spin_unlock(&block_group->lock); | |
2159 | return ret; | |
2160 | } | |
2161 | ||
2dd7e7bc NA |
2162 | static void wait_eb_writebacks(struct btrfs_block_group *block_group) |
2163 | { | |
2164 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
2165 | const u64 end = block_group->start + block_group->length; | |
2166 | struct radix_tree_iter iter; | |
2167 | struct extent_buffer *eb; | |
2168 | void __rcu **slot; | |
2169 | ||
2170 | rcu_read_lock(); | |
2171 | radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, | |
2172 | block_group->start >> fs_info->sectorsize_bits) { | |
2173 | eb = radix_tree_deref_slot(slot); | |
2174 | if (!eb) | |
2175 | continue; | |
2176 | if (radix_tree_deref_retry(eb)) { | |
2177 | slot = radix_tree_iter_retry(&iter); | |
2178 | continue; | |
2179 | } | |
2180 | ||
2181 | if (eb->start < block_group->start) | |
2182 | continue; | |
2183 | if (eb->start >= end) | |
2184 | break; | |
2185 | ||
2186 | slot = radix_tree_iter_resume(slot, &iter); | |
2187 | rcu_read_unlock(); | |
2188 | wait_on_extent_buffer_writeback(eb); | |
2189 | rcu_read_lock(); | |
2190 | } | |
2191 | rcu_read_unlock(); | |
2192 | } | |
2193 | ||
d70cbdda | 2194 | static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_written) |
afba2bc0 NA |
2195 | { |
2196 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
2197 | struct map_lookup *map; | |
2dd7e7bc NA |
2198 | const bool is_metadata = (block_group->flags & |
2199 | (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM)); | |
afba2bc0 | 2200 | int ret = 0; |
4dcbb8ab | 2201 | int i; |
afba2bc0 | 2202 | |
afba2bc0 | 2203 | spin_lock(&block_group->lock); |
3349b57f | 2204 | if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) { |
afba2bc0 NA |
2205 | spin_unlock(&block_group->lock); |
2206 | return 0; | |
2207 | } | |
2208 | ||
2209 | /* Check if we have unwritten allocated space */ | |
2dd7e7bc | 2210 | if (is_metadata && |
aa9ffadf | 2211 | block_group->start + block_group->alloc_offset > block_group->meta_write_pointer) { |
afba2bc0 NA |
2212 | spin_unlock(&block_group->lock); |
2213 | return -EAGAIN; | |
2214 | } | |
afba2bc0 NA |
2215 | |
2216 | /* | |
d70cbdda NA |
2217 | * If we are sure that the block group is full (= no more room left for |
2218 | * new allocation) and the IO for the last usable block is completed, we | |
2219 | * don't need to wait for the other IOs. This holds because we ensure | |
2220 | * the sequential IO submissions using the ZONE_APPEND command for data | |
2221 | * and block_group->meta_write_pointer for metadata. | |
afba2bc0 | 2222 | */ |
d70cbdda | 2223 | if (!fully_written) { |
332581bd NA |
2224 | if (test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, &block_group->runtime_flags)) { |
2225 | spin_unlock(&block_group->lock); | |
2226 | return -EAGAIN; | |
2227 | } | |
afba2bc0 | 2228 | spin_unlock(&block_group->lock); |
afba2bc0 | 2229 | |
d70cbdda NA |
2230 | ret = btrfs_inc_block_group_ro(block_group, false); |
2231 | if (ret) | |
2232 | return ret; | |
2233 | ||
2234 | /* Ensure all writes in this block group finish */ | |
2235 | btrfs_wait_block_group_reservations(block_group); | |
2236 | /* No need to wait for NOCOW writers. Zoned mode does not allow that */ | |
2237 | btrfs_wait_ordered_roots(fs_info, U64_MAX, block_group->start, | |
2238 | block_group->length); | |
2dd7e7bc NA |
2239 | /* Wait for extent buffers to be written. */ |
2240 | if (is_metadata) | |
2241 | wait_eb_writebacks(block_group); | |
d70cbdda NA |
2242 | |
2243 | spin_lock(&block_group->lock); | |
2244 | ||
2245 | /* | |
2246 | * Bail out if someone already deactivated the block group, or | |
2247 | * allocated space is left in the block group. | |
2248 | */ | |
3349b57f JB |
2249 | if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, |
2250 | &block_group->runtime_flags)) { | |
d70cbdda NA |
2251 | spin_unlock(&block_group->lock); |
2252 | btrfs_dec_block_group_ro(block_group); | |
2253 | return 0; | |
2254 | } | |
2255 | ||
332581bd NA |
2256 | if (block_group->reserved || |
2257 | test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, | |
2258 | &block_group->runtime_flags)) { | |
d70cbdda NA |
2259 | spin_unlock(&block_group->lock); |
2260 | btrfs_dec_block_group_ro(block_group); | |
2261 | return -EAGAIN; | |
2262 | } | |
afba2bc0 NA |
2263 | } |
2264 | ||
3349b57f | 2265 | clear_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags); |
afba2bc0 | 2266 | block_group->alloc_offset = block_group->zone_capacity; |
c1c3c2bc NA |
2267 | if (block_group->flags & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM)) |
2268 | block_group->meta_write_pointer = block_group->start + | |
2269 | block_group->zone_capacity; | |
afba2bc0 NA |
2270 | block_group->free_space_ctl->free_space = 0; |
2271 | btrfs_clear_treelog_bg(block_group); | |
5911f538 | 2272 | btrfs_clear_data_reloc_bg(block_group); |
afba2bc0 NA |
2273 | spin_unlock(&block_group->lock); |
2274 | ||
d70cbdda | 2275 | map = block_group->physical_map; |
4dcbb8ab | 2276 | for (i = 0; i < map->num_stripes; i++) { |
d70cbdda NA |
2277 | struct btrfs_device *device = map->stripes[i].dev; |
2278 | const u64 physical = map->stripes[i].physical; | |
a7e1ac7b | 2279 | struct btrfs_zoned_device_info *zinfo = device->zone_info; |
afba2bc0 | 2280 | |
a7e1ac7b | 2281 | if (zinfo->max_active_zones == 0) |
4dcbb8ab | 2282 | continue; |
afba2bc0 | 2283 | |
b3a3b025 NA |
2284 | ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH, |
2285 | physical >> SECTOR_SHIFT, | |
a7e1ac7b | 2286 | zinfo->zone_size >> SECTOR_SHIFT, |
b3a3b025 | 2287 | GFP_NOFS); |
4dcbb8ab | 2288 | |
b3a3b025 NA |
2289 | if (ret) |
2290 | return ret; | |
afba2bc0 | 2291 | |
a7e1ac7b NA |
2292 | if (!(block_group->flags & BTRFS_BLOCK_GROUP_DATA)) |
2293 | zinfo->reserved_active_zones++; | |
4dcbb8ab | 2294 | btrfs_dev_clear_active_zone(device, physical); |
afba2bc0 | 2295 | } |
d70cbdda NA |
2296 | |
2297 | if (!fully_written) | |
2298 | btrfs_dec_block_group_ro(block_group); | |
afba2bc0 | 2299 | |
4dcbb8ab JT |
2300 | spin_lock(&fs_info->zone_active_bgs_lock); |
2301 | ASSERT(!list_empty(&block_group->active_bg_list)); | |
2302 | list_del_init(&block_group->active_bg_list); | |
2303 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2304 | ||
2305 | /* For active_bg_list */ | |
2306 | btrfs_put_block_group(block_group); | |
2307 | ||
d5b81ced | 2308 | clear_and_wake_up_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags); |
2ce543f4 | 2309 | |
4dcbb8ab | 2310 | return 0; |
afba2bc0 | 2311 | } |
a85f05e5 | 2312 | |
d70cbdda NA |
2313 | int btrfs_zone_finish(struct btrfs_block_group *block_group) |
2314 | { | |
2315 | if (!btrfs_is_zoned(block_group->fs_info)) | |
2316 | return 0; | |
2317 | ||
2318 | return do_zone_finish(block_group, false); | |
2319 | } | |
2320 | ||
82187d2e | 2321 | bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) |
a85f05e5 | 2322 | { |
0b9e6676 | 2323 | struct btrfs_fs_info *fs_info = fs_devices->fs_info; |
a85f05e5 NA |
2324 | struct btrfs_device *device; |
2325 | bool ret = false; | |
2326 | ||
0b9e6676 | 2327 | if (!btrfs_is_zoned(fs_info)) |
a85f05e5 NA |
2328 | return true; |
2329 | ||
a85f05e5 | 2330 | /* Check if there is a device with active zones left */ |
0b9e6676 | 2331 | mutex_lock(&fs_info->chunk_mutex); |
a7e1ac7b | 2332 | spin_lock(&fs_info->zone_active_bgs_lock); |
0b9e6676 | 2333 | list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) { |
a85f05e5 | 2334 | struct btrfs_zoned_device_info *zinfo = device->zone_info; |
a7e1ac7b | 2335 | int reserved = 0; |
a85f05e5 NA |
2336 | |
2337 | if (!device->bdev) | |
2338 | continue; | |
2339 | ||
9e1cdf0c | 2340 | if (!zinfo->max_active_zones) { |
a85f05e5 NA |
2341 | ret = true; |
2342 | break; | |
2343 | } | |
9e1cdf0c | 2344 | |
a7e1ac7b NA |
2345 | if (flags & BTRFS_BLOCK_GROUP_DATA) |
2346 | reserved = zinfo->reserved_active_zones; | |
2347 | ||
9e1cdf0c NA |
2348 | switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) { |
2349 | case 0: /* single */ | |
a7e1ac7b | 2350 | ret = (atomic_read(&zinfo->active_zones_left) >= (1 + reserved)); |
9e1cdf0c NA |
2351 | break; |
2352 | case BTRFS_BLOCK_GROUP_DUP: | |
a7e1ac7b | 2353 | ret = (atomic_read(&zinfo->active_zones_left) >= (2 + reserved)); |
9e1cdf0c NA |
2354 | break; |
2355 | } | |
2356 | if (ret) | |
2357 | break; | |
a85f05e5 | 2358 | } |
a7e1ac7b | 2359 | spin_unlock(&fs_info->zone_active_bgs_lock); |
0b9e6676 | 2360 | mutex_unlock(&fs_info->chunk_mutex); |
a85f05e5 | 2361 | |
2ce543f4 NA |
2362 | if (!ret) |
2363 | set_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags); | |
2364 | ||
a85f05e5 NA |
2365 | return ret; |
2366 | } | |
be1a1d7a NA |
2367 | |
2368 | void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length) | |
2369 | { | |
2370 | struct btrfs_block_group *block_group; | |
8b8a5399 | 2371 | u64 min_alloc_bytes; |
be1a1d7a NA |
2372 | |
2373 | if (!btrfs_is_zoned(fs_info)) | |
2374 | return; | |
2375 | ||
2376 | block_group = btrfs_lookup_block_group(fs_info, logical); | |
2377 | ASSERT(block_group); | |
2378 | ||
8b8a5399 NA |
2379 | /* No MIXED_BG on zoned btrfs. */ |
2380 | if (block_group->flags & BTRFS_BLOCK_GROUP_DATA) | |
2381 | min_alloc_bytes = fs_info->sectorsize; | |
2382 | else | |
2383 | min_alloc_bytes = fs_info->nodesize; | |
be1a1d7a | 2384 | |
8b8a5399 NA |
2385 | /* Bail out if we can allocate more data from this block group. */ |
2386 | if (logical + length + min_alloc_bytes <= | |
2387 | block_group->start + block_group->zone_capacity) | |
be1a1d7a | 2388 | goto out; |
be1a1d7a | 2389 | |
d70cbdda | 2390 | do_zone_finish(block_group, true); |
be1a1d7a | 2391 | |
be1a1d7a NA |
2392 | out: |
2393 | btrfs_put_block_group(block_group); | |
2394 | } | |
be1a1d7a | 2395 | |
56fbb0a4 NA |
2396 | static void btrfs_zone_finish_endio_workfn(struct work_struct *work) |
2397 | { | |
2398 | struct btrfs_block_group *bg = | |
2399 | container_of(work, struct btrfs_block_group, zone_finish_work); | |
be1a1d7a | 2400 | |
56fbb0a4 NA |
2401 | wait_on_extent_buffer_writeback(bg->last_eb); |
2402 | free_extent_buffer(bg->last_eb); | |
2403 | btrfs_zone_finish_endio(bg->fs_info, bg->start, bg->length); | |
2404 | btrfs_put_block_group(bg); | |
2405 | } | |
be1a1d7a | 2406 | |
56fbb0a4 NA |
2407 | void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, |
2408 | struct extent_buffer *eb) | |
2409 | { | |
961f5b8b DS |
2410 | if (!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &bg->runtime_flags) || |
2411 | eb->start + eb->len * 2 <= bg->start + bg->zone_capacity) | |
56fbb0a4 | 2412 | return; |
be1a1d7a | 2413 | |
56fbb0a4 NA |
2414 | if (WARN_ON(bg->zone_finish_work.func == btrfs_zone_finish_endio_workfn)) { |
2415 | btrfs_err(bg->fs_info, "double scheduling of bg %llu zone finishing", | |
2416 | bg->start); | |
2417 | return; | |
2418 | } | |
be1a1d7a | 2419 | |
56fbb0a4 NA |
2420 | /* For the work */ |
2421 | btrfs_get_block_group(bg); | |
2422 | atomic_inc(&eb->refs); | |
2423 | bg->last_eb = eb; | |
2424 | INIT_WORK(&bg->zone_finish_work, btrfs_zone_finish_endio_workfn); | |
2425 | queue_work(system_unbound_wq, &bg->zone_finish_work); | |
be1a1d7a | 2426 | } |
c2707a25 JT |
2427 | |
2428 | void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) | |
2429 | { | |
2430 | struct btrfs_fs_info *fs_info = bg->fs_info; | |
2431 | ||
2432 | spin_lock(&fs_info->relocation_bg_lock); | |
2433 | if (fs_info->data_reloc_bg == bg->start) | |
2434 | fs_info->data_reloc_bg = 0; | |
2435 | spin_unlock(&fs_info->relocation_bg_lock); | |
2436 | } | |
16beac87 NA |
2437 | |
2438 | void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) | |
2439 | { | |
2440 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2441 | struct btrfs_device *device; | |
2442 | ||
2443 | if (!btrfs_is_zoned(fs_info)) | |
2444 | return; | |
2445 | ||
2446 | mutex_lock(&fs_devices->device_list_mutex); | |
2447 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
2448 | if (device->zone_info) { | |
2449 | vfree(device->zone_info->zone_cache); | |
2450 | device->zone_info->zone_cache = NULL; | |
2451 | } | |
2452 | } | |
2453 | mutex_unlock(&fs_devices->device_list_mutex); | |
2454 | } | |
3687fcb0 JT |
2455 | |
2456 | bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) | |
2457 | { | |
2458 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2459 | struct btrfs_device *device; | |
2460 | u64 used = 0; | |
2461 | u64 total = 0; | |
2462 | u64 factor; | |
2463 | ||
2464 | ASSERT(btrfs_is_zoned(fs_info)); | |
2465 | ||
2466 | if (fs_info->bg_reclaim_threshold == 0) | |
2467 | return false; | |
2468 | ||
2469 | mutex_lock(&fs_devices->device_list_mutex); | |
2470 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
2471 | if (!device->bdev) | |
2472 | continue; | |
2473 | ||
2474 | total += device->disk_total_bytes; | |
2475 | used += device->bytes_used; | |
2476 | } | |
2477 | mutex_unlock(&fs_devices->device_list_mutex); | |
2478 | ||
2479 | factor = div64_u64(used * 100, total); | |
2480 | return factor >= fs_info->bg_reclaim_threshold; | |
2481 | } | |
343d8a30 NA |
2482 | |
2483 | void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, | |
2484 | u64 length) | |
2485 | { | |
2486 | struct btrfs_block_group *block_group; | |
2487 | ||
2488 | if (!btrfs_is_zoned(fs_info)) | |
2489 | return; | |
2490 | ||
2491 | block_group = btrfs_lookup_block_group(fs_info, logical); | |
2492 | /* It should be called on a previous data relocation block group. */ | |
2493 | ASSERT(block_group && (block_group->flags & BTRFS_BLOCK_GROUP_DATA)); | |
2494 | ||
2495 | spin_lock(&block_group->lock); | |
3349b57f | 2496 | if (!test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, &block_group->runtime_flags)) |
343d8a30 NA |
2497 | goto out; |
2498 | ||
2499 | /* All relocation extents are written. */ | |
2500 | if (block_group->start + block_group->alloc_offset == logical + length) { | |
332581bd NA |
2501 | /* |
2502 | * Now, release this block group for further allocations and | |
2503 | * zone finish. | |
2504 | */ | |
3349b57f JB |
2505 | clear_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, |
2506 | &block_group->runtime_flags); | |
343d8a30 NA |
2507 | } |
2508 | ||
2509 | out: | |
2510 | spin_unlock(&block_group->lock); | |
2511 | btrfs_put_block_group(block_group); | |
2512 | } | |
393f646e NA |
2513 | |
2514 | int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) | |
2515 | { | |
2516 | struct btrfs_block_group *block_group; | |
2517 | struct btrfs_block_group *min_bg = NULL; | |
2518 | u64 min_avail = U64_MAX; | |
2519 | int ret; | |
2520 | ||
2521 | spin_lock(&fs_info->zone_active_bgs_lock); | |
2522 | list_for_each_entry(block_group, &fs_info->zone_active_bgs, | |
2523 | active_bg_list) { | |
2524 | u64 avail; | |
2525 | ||
2526 | spin_lock(&block_group->lock); | |
fa2068d7 | 2527 | if (block_group->reserved || block_group->alloc_offset == 0 || |
332581bd NA |
2528 | (block_group->flags & BTRFS_BLOCK_GROUP_SYSTEM) || |
2529 | test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, &block_group->runtime_flags)) { | |
393f646e NA |
2530 | spin_unlock(&block_group->lock); |
2531 | continue; | |
2532 | } | |
2533 | ||
2534 | avail = block_group->zone_capacity - block_group->alloc_offset; | |
2535 | if (min_avail > avail) { | |
2536 | if (min_bg) | |
2537 | btrfs_put_block_group(min_bg); | |
2538 | min_bg = block_group; | |
2539 | min_avail = avail; | |
2540 | btrfs_get_block_group(min_bg); | |
2541 | } | |
2542 | spin_unlock(&block_group->lock); | |
2543 | } | |
2544 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2545 | ||
2546 | if (!min_bg) | |
2547 | return 0; | |
2548 | ||
2549 | ret = btrfs_zone_finish(min_bg); | |
2550 | btrfs_put_block_group(min_bg); | |
2551 | ||
2552 | return ret < 0 ? ret : 1; | |
2553 | } | |
b0931513 NA |
2554 | |
2555 | int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, | |
2556 | struct btrfs_space_info *space_info, | |
2557 | bool do_finish) | |
2558 | { | |
2559 | struct btrfs_block_group *bg; | |
2560 | int index; | |
2561 | ||
2562 | if (!btrfs_is_zoned(fs_info) || (space_info->flags & BTRFS_BLOCK_GROUP_DATA)) | |
2563 | return 0; | |
2564 | ||
b0931513 NA |
2565 | for (;;) { |
2566 | int ret; | |
2567 | bool need_finish = false; | |
2568 | ||
2569 | down_read(&space_info->groups_sem); | |
2570 | for (index = 0; index < BTRFS_NR_RAID_TYPES; index++) { | |
2571 | list_for_each_entry(bg, &space_info->block_groups[index], | |
2572 | list) { | |
2573 | if (!spin_trylock(&bg->lock)) | |
2574 | continue; | |
3349b57f JB |
2575 | if (btrfs_zoned_bg_is_full(bg) || |
2576 | test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, | |
2577 | &bg->runtime_flags)) { | |
b0931513 NA |
2578 | spin_unlock(&bg->lock); |
2579 | continue; | |
2580 | } | |
2581 | spin_unlock(&bg->lock); | |
2582 | ||
2583 | if (btrfs_zone_activate(bg)) { | |
2584 | up_read(&space_info->groups_sem); | |
2585 | return 1; | |
2586 | } | |
2587 | ||
2588 | need_finish = true; | |
2589 | } | |
2590 | } | |
2591 | up_read(&space_info->groups_sem); | |
2592 | ||
2593 | if (!do_finish || !need_finish) | |
2594 | break; | |
2595 | ||
2596 | ret = btrfs_zone_finish_one_bg(fs_info); | |
2597 | if (ret == 0) | |
2598 | break; | |
2599 | if (ret < 0) | |
2600 | return ret; | |
2601 | } | |
2602 | ||
2603 | return 0; | |
2604 | } | |
a7e1ac7b NA |
2605 | |
2606 | /* | |
2607 | * Reserve zones for one metadata block group, one tree-log block group, and one | |
2608 | * system block group. | |
2609 | */ | |
2610 | void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) | |
2611 | { | |
2612 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2613 | struct btrfs_block_group *block_group; | |
2614 | struct btrfs_device *device; | |
2615 | /* Reserve zones for normal SINGLE metadata and tree-log block group. */ | |
2616 | unsigned int metadata_reserve = 2; | |
2617 | /* Reserve a zone for SINGLE system block group. */ | |
2618 | unsigned int system_reserve = 1; | |
2619 | ||
2620 | if (!test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags)) | |
2621 | return; | |
2622 | ||
2623 | /* | |
2624 | * This function is called from the mount context. So, there is no | |
2625 | * parallel process touching the bits. No need for read_seqretry(). | |
2626 | */ | |
2627 | if (fs_info->avail_metadata_alloc_bits & BTRFS_BLOCK_GROUP_DUP) | |
2628 | metadata_reserve = 4; | |
2629 | if (fs_info->avail_system_alloc_bits & BTRFS_BLOCK_GROUP_DUP) | |
2630 | system_reserve = 2; | |
2631 | ||
2632 | /* Apply the reservation on all the devices. */ | |
2633 | mutex_lock(&fs_devices->device_list_mutex); | |
2634 | list_for_each_entry(device, &fs_devices->devices, dev_list) { | |
2635 | if (!device->bdev) | |
2636 | continue; | |
2637 | ||
2638 | device->zone_info->reserved_active_zones = | |
2639 | metadata_reserve + system_reserve; | |
2640 | } | |
2641 | mutex_unlock(&fs_devices->device_list_mutex); | |
2642 | ||
2643 | /* Release reservation for currently active block groups. */ | |
2644 | spin_lock(&fs_info->zone_active_bgs_lock); | |
2645 | list_for_each_entry(block_group, &fs_info->zone_active_bgs, active_bg_list) { | |
2646 | struct map_lookup *map = block_group->physical_map; | |
2647 | ||
2648 | if (!(block_group->flags & | |
2649 | (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM))) | |
2650 | continue; | |
2651 | ||
2652 | for (int i = 0; i < map->num_stripes; i++) | |
2653 | map->stripes[i].dev->zone_info->reserved_active_zones--; | |
2654 | } | |
2655 | spin_unlock(&fs_info->zone_active_bgs_lock); | |
2656 | } |