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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
e20d96d6 | 19 | #include <linux/fs.h> |
d98237b3 | 20 | #include <linux/blkdev.h> |
87cbda5c | 21 | #include <linux/scatterlist.h> |
22b0ebda | 22 | #include <linux/swap.h> |
0f7d52f4 | 23 | #include <linux/radix-tree.h> |
35b7e476 | 24 | #include <linux/writeback.h> |
d397712b | 25 | #include <linux/buffer_head.h> |
ce9adaa5 | 26 | #include <linux/workqueue.h> |
a74a4b97 | 27 | #include <linux/kthread.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
784b4e29 | 29 | #include <linux/migrate.h> |
7a36ddec | 30 | #include <linux/ratelimit.h> |
6463fe58 | 31 | #include <linux/uuid.h> |
803b2f54 | 32 | #include <linux/semaphore.h> |
540adea3 | 33 | #include <linux/error-injection.h> |
9678c543 | 34 | #include <linux/crc32c.h> |
7e75bf3f | 35 | #include <asm/unaligned.h> |
eb60ceac CM |
36 | #include "ctree.h" |
37 | #include "disk-io.h" | |
e089f05c | 38 | #include "transaction.h" |
0f7d52f4 | 39 | #include "btrfs_inode.h" |
0b86a832 | 40 | #include "volumes.h" |
db94535d | 41 | #include "print-tree.h" |
925baedd | 42 | #include "locking.h" |
e02119d5 | 43 | #include "tree-log.h" |
fa9c0d79 | 44 | #include "free-space-cache.h" |
70f6d82e | 45 | #include "free-space-tree.h" |
581bb050 | 46 | #include "inode-map.h" |
21adbd5c | 47 | #include "check-integrity.h" |
606686ee | 48 | #include "rcu-string.h" |
8dabb742 | 49 | #include "dev-replace.h" |
53b381b3 | 50 | #include "raid56.h" |
5ac1d209 | 51 | #include "sysfs.h" |
fcebe456 | 52 | #include "qgroup.h" |
ebb8765b | 53 | #include "compression.h" |
557ea5dd | 54 | #include "tree-checker.h" |
fd708b81 | 55 | #include "ref-verify.h" |
eb60ceac | 56 | |
de0022b9 JB |
57 | #ifdef CONFIG_X86 |
58 | #include <asm/cpufeature.h> | |
59 | #endif | |
60 | ||
319e4d06 QW |
61 | #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ |
62 | BTRFS_HEADER_FLAG_RELOC |\ | |
63 | BTRFS_SUPER_FLAG_ERROR |\ | |
64 | BTRFS_SUPER_FLAG_SEEDING |\ | |
e2731e55 AJ |
65 | BTRFS_SUPER_FLAG_METADUMP |\ |
66 | BTRFS_SUPER_FLAG_METADUMP_V2) | |
319e4d06 | 67 | |
e8c9f186 | 68 | static const struct extent_io_ops btree_extent_io_ops; |
8b712842 | 69 | static void end_workqueue_fn(struct btrfs_work *work); |
4df27c4d | 70 | static void free_fs_root(struct btrfs_root *root); |
3d3a126a | 71 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info); |
143bede5 | 72 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
acce952b | 73 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
2ff7e61e | 74 | struct btrfs_fs_info *fs_info); |
143bede5 | 75 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
2ff7e61e | 76 | static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, |
acce952b | 77 | struct extent_io_tree *dirty_pages, |
78 | int mark); | |
2ff7e61e | 79 | static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, |
acce952b | 80 | struct extent_io_tree *pinned_extents); |
2ff7e61e JM |
81 | static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info); |
82 | static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info); | |
ce9adaa5 | 83 | |
d352ac68 | 84 | /* |
97eb6b69 DS |
85 | * btrfs_end_io_wq structs are used to do processing in task context when an IO |
86 | * is complete. This is used during reads to verify checksums, and it is used | |
d352ac68 CM |
87 | * by writes to insert metadata for new file extents after IO is complete. |
88 | */ | |
97eb6b69 | 89 | struct btrfs_end_io_wq { |
ce9adaa5 CM |
90 | struct bio *bio; |
91 | bio_end_io_t *end_io; | |
92 | void *private; | |
93 | struct btrfs_fs_info *info; | |
4e4cbee9 | 94 | blk_status_t status; |
bfebd8b5 | 95 | enum btrfs_wq_endio_type metadata; |
8b712842 | 96 | struct btrfs_work work; |
ce9adaa5 | 97 | }; |
0da5468f | 98 | |
97eb6b69 DS |
99 | static struct kmem_cache *btrfs_end_io_wq_cache; |
100 | ||
101 | int __init btrfs_end_io_wq_init(void) | |
102 | { | |
103 | btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", | |
104 | sizeof(struct btrfs_end_io_wq), | |
105 | 0, | |
fba4b697 | 106 | SLAB_MEM_SPREAD, |
97eb6b69 DS |
107 | NULL); |
108 | if (!btrfs_end_io_wq_cache) | |
109 | return -ENOMEM; | |
110 | return 0; | |
111 | } | |
112 | ||
e67c718b | 113 | void __cold btrfs_end_io_wq_exit(void) |
97eb6b69 | 114 | { |
5598e900 | 115 | kmem_cache_destroy(btrfs_end_io_wq_cache); |
97eb6b69 DS |
116 | } |
117 | ||
d352ac68 CM |
118 | /* |
119 | * async submit bios are used to offload expensive checksumming | |
120 | * onto the worker threads. They checksum file and metadata bios | |
121 | * just before they are sent down the IO stack. | |
122 | */ | |
44b8bd7e | 123 | struct async_submit_bio { |
c6100a4b JB |
124 | void *private_data; |
125 | struct btrfs_fs_info *fs_info; | |
44b8bd7e | 126 | struct bio *bio; |
4a69a410 CM |
127 | extent_submit_bio_hook_t *submit_bio_start; |
128 | extent_submit_bio_hook_t *submit_bio_done; | |
44b8bd7e | 129 | int mirror_num; |
c8b97818 | 130 | unsigned long bio_flags; |
eaf25d93 CM |
131 | /* |
132 | * bio_offset is optional, can be used if the pages in the bio | |
133 | * can't tell us where in the file the bio should go | |
134 | */ | |
135 | u64 bio_offset; | |
8b712842 | 136 | struct btrfs_work work; |
4e4cbee9 | 137 | blk_status_t status; |
44b8bd7e CM |
138 | }; |
139 | ||
85d4e461 CM |
140 | /* |
141 | * Lockdep class keys for extent_buffer->lock's in this root. For a given | |
142 | * eb, the lockdep key is determined by the btrfs_root it belongs to and | |
143 | * the level the eb occupies in the tree. | |
144 | * | |
145 | * Different roots are used for different purposes and may nest inside each | |
146 | * other and they require separate keysets. As lockdep keys should be | |
147 | * static, assign keysets according to the purpose of the root as indicated | |
148 | * by btrfs_root->objectid. This ensures that all special purpose roots | |
149 | * have separate keysets. | |
4008c04a | 150 | * |
85d4e461 CM |
151 | * Lock-nesting across peer nodes is always done with the immediate parent |
152 | * node locked thus preventing deadlock. As lockdep doesn't know this, use | |
153 | * subclass to avoid triggering lockdep warning in such cases. | |
4008c04a | 154 | * |
85d4e461 CM |
155 | * The key is set by the readpage_end_io_hook after the buffer has passed |
156 | * csum validation but before the pages are unlocked. It is also set by | |
157 | * btrfs_init_new_buffer on freshly allocated blocks. | |
4008c04a | 158 | * |
85d4e461 CM |
159 | * We also add a check to make sure the highest level of the tree is the |
160 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code | |
161 | * needs update as well. | |
4008c04a CM |
162 | */ |
163 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
164 | # if BTRFS_MAX_LEVEL != 8 | |
165 | # error | |
166 | # endif | |
85d4e461 CM |
167 | |
168 | static struct btrfs_lockdep_keyset { | |
169 | u64 id; /* root objectid */ | |
170 | const char *name_stem; /* lock name stem */ | |
171 | char names[BTRFS_MAX_LEVEL + 1][20]; | |
172 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; | |
173 | } btrfs_lockdep_keysets[] = { | |
174 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, | |
175 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, | |
176 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, | |
177 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, | |
178 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, | |
179 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, | |
60b62978 | 180 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
85d4e461 CM |
181 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
182 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, | |
183 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, | |
13fd8da9 | 184 | { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, |
6b20e0ad | 185 | { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, |
85d4e461 | 186 | { .id = 0, .name_stem = "tree" }, |
4008c04a | 187 | }; |
85d4e461 CM |
188 | |
189 | void __init btrfs_init_lockdep(void) | |
190 | { | |
191 | int i, j; | |
192 | ||
193 | /* initialize lockdep class names */ | |
194 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { | |
195 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; | |
196 | ||
197 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) | |
198 | snprintf(ks->names[j], sizeof(ks->names[j]), | |
199 | "btrfs-%s-%02d", ks->name_stem, j); | |
200 | } | |
201 | } | |
202 | ||
203 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, | |
204 | int level) | |
205 | { | |
206 | struct btrfs_lockdep_keyset *ks; | |
207 | ||
208 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); | |
209 | ||
210 | /* find the matching keyset, id 0 is the default entry */ | |
211 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) | |
212 | if (ks->id == objectid) | |
213 | break; | |
214 | ||
215 | lockdep_set_class_and_name(&eb->lock, | |
216 | &ks->keys[level], ks->names[level]); | |
217 | } | |
218 | ||
4008c04a CM |
219 | #endif |
220 | ||
d352ac68 CM |
221 | /* |
222 | * extents on the btree inode are pretty simple, there's one extent | |
223 | * that covers the entire device | |
224 | */ | |
6af49dbd | 225 | struct extent_map *btree_get_extent(struct btrfs_inode *inode, |
306e16ce | 226 | struct page *page, size_t pg_offset, u64 start, u64 len, |
b2950863 | 227 | int create) |
7eccb903 | 228 | { |
fc4f21b1 NB |
229 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb); |
230 | struct extent_map_tree *em_tree = &inode->extent_tree; | |
5f39d397 CM |
231 | struct extent_map *em; |
232 | int ret; | |
233 | ||
890871be | 234 | read_lock(&em_tree->lock); |
d1310b2e | 235 | em = lookup_extent_mapping(em_tree, start, len); |
a061fc8d | 236 | if (em) { |
0b246afa | 237 | em->bdev = fs_info->fs_devices->latest_bdev; |
890871be | 238 | read_unlock(&em_tree->lock); |
5f39d397 | 239 | goto out; |
a061fc8d | 240 | } |
890871be | 241 | read_unlock(&em_tree->lock); |
7b13b7b1 | 242 | |
172ddd60 | 243 | em = alloc_extent_map(); |
5f39d397 CM |
244 | if (!em) { |
245 | em = ERR_PTR(-ENOMEM); | |
246 | goto out; | |
247 | } | |
248 | em->start = 0; | |
0afbaf8c | 249 | em->len = (u64)-1; |
c8b97818 | 250 | em->block_len = (u64)-1; |
5f39d397 | 251 | em->block_start = 0; |
0b246afa | 252 | em->bdev = fs_info->fs_devices->latest_bdev; |
d1310b2e | 253 | |
890871be | 254 | write_lock(&em_tree->lock); |
09a2a8f9 | 255 | ret = add_extent_mapping(em_tree, em, 0); |
5f39d397 CM |
256 | if (ret == -EEXIST) { |
257 | free_extent_map(em); | |
7b13b7b1 | 258 | em = lookup_extent_mapping(em_tree, start, len); |
b4f359ab | 259 | if (!em) |
0433f20d | 260 | em = ERR_PTR(-EIO); |
5f39d397 | 261 | } else if (ret) { |
7b13b7b1 | 262 | free_extent_map(em); |
0433f20d | 263 | em = ERR_PTR(ret); |
5f39d397 | 264 | } |
890871be | 265 | write_unlock(&em_tree->lock); |
7b13b7b1 | 266 | |
5f39d397 CM |
267 | out: |
268 | return em; | |
7eccb903 CM |
269 | } |
270 | ||
9ed57367 | 271 | u32 btrfs_csum_data(const char *data, u32 seed, size_t len) |
19c00ddc | 272 | { |
9678c543 | 273 | return crc32c(seed, data, len); |
19c00ddc CM |
274 | } |
275 | ||
0b5e3daf | 276 | void btrfs_csum_final(u32 crc, u8 *result) |
19c00ddc | 277 | { |
7e75bf3f | 278 | put_unaligned_le32(~crc, result); |
19c00ddc CM |
279 | } |
280 | ||
d352ac68 CM |
281 | /* |
282 | * compute the csum for a btree block, and either verify it or write it | |
283 | * into the csum field of the block. | |
284 | */ | |
01d58472 DD |
285 | static int csum_tree_block(struct btrfs_fs_info *fs_info, |
286 | struct extent_buffer *buf, | |
19c00ddc CM |
287 | int verify) |
288 | { | |
01d58472 | 289 | u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); |
71a63551 | 290 | char result[BTRFS_CSUM_SIZE]; |
19c00ddc CM |
291 | unsigned long len; |
292 | unsigned long cur_len; | |
293 | unsigned long offset = BTRFS_CSUM_SIZE; | |
19c00ddc CM |
294 | char *kaddr; |
295 | unsigned long map_start; | |
296 | unsigned long map_len; | |
297 | int err; | |
298 | u32 crc = ~(u32)0; | |
299 | ||
300 | len = buf->len - offset; | |
d397712b | 301 | while (len > 0) { |
19c00ddc | 302 | err = map_private_extent_buffer(buf, offset, 32, |
a6591715 | 303 | &kaddr, &map_start, &map_len); |
d397712b | 304 | if (err) |
8bd98f0e | 305 | return err; |
19c00ddc | 306 | cur_len = min(len, map_len - (offset - map_start)); |
b0496686 | 307 | crc = btrfs_csum_data(kaddr + offset - map_start, |
19c00ddc CM |
308 | crc, cur_len); |
309 | len -= cur_len; | |
310 | offset += cur_len; | |
19c00ddc | 311 | } |
71a63551 | 312 | memset(result, 0, BTRFS_CSUM_SIZE); |
607d432d | 313 | |
19c00ddc CM |
314 | btrfs_csum_final(crc, result); |
315 | ||
316 | if (verify) { | |
607d432d | 317 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
e4204ded CM |
318 | u32 val; |
319 | u32 found = 0; | |
607d432d | 320 | memcpy(&found, result, csum_size); |
e4204ded | 321 | |
607d432d | 322 | read_extent_buffer(buf, &val, 0, csum_size); |
94647322 | 323 | btrfs_warn_rl(fs_info, |
5d163e0e | 324 | "%s checksum verify failed on %llu wanted %X found %X level %d", |
01d58472 | 325 | fs_info->sb->s_id, buf->start, |
efe120a0 | 326 | val, found, btrfs_header_level(buf)); |
8bd98f0e | 327 | return -EUCLEAN; |
19c00ddc CM |
328 | } |
329 | } else { | |
607d432d | 330 | write_extent_buffer(buf, result, 0, csum_size); |
19c00ddc | 331 | } |
71a63551 | 332 | |
19c00ddc CM |
333 | return 0; |
334 | } | |
335 | ||
d352ac68 CM |
336 | /* |
337 | * we can't consider a given block up to date unless the transid of the | |
338 | * block matches the transid in the parent node's pointer. This is how we | |
339 | * detect blocks that either didn't get written at all or got written | |
340 | * in the wrong place. | |
341 | */ | |
1259ab75 | 342 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
b9fab919 CM |
343 | struct extent_buffer *eb, u64 parent_transid, |
344 | int atomic) | |
1259ab75 | 345 | { |
2ac55d41 | 346 | struct extent_state *cached_state = NULL; |
1259ab75 | 347 | int ret; |
2755a0de | 348 | bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); |
1259ab75 CM |
349 | |
350 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) | |
351 | return 0; | |
352 | ||
b9fab919 CM |
353 | if (atomic) |
354 | return -EAGAIN; | |
355 | ||
a26e8c9f JB |
356 | if (need_lock) { |
357 | btrfs_tree_read_lock(eb); | |
358 | btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); | |
359 | } | |
360 | ||
2ac55d41 | 361 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
ff13db41 | 362 | &cached_state); |
0b32f4bb | 363 | if (extent_buffer_uptodate(eb) && |
1259ab75 CM |
364 | btrfs_header_generation(eb) == parent_transid) { |
365 | ret = 0; | |
366 | goto out; | |
367 | } | |
94647322 DS |
368 | btrfs_err_rl(eb->fs_info, |
369 | "parent transid verify failed on %llu wanted %llu found %llu", | |
370 | eb->start, | |
29549aec | 371 | parent_transid, btrfs_header_generation(eb)); |
1259ab75 | 372 | ret = 1; |
a26e8c9f JB |
373 | |
374 | /* | |
375 | * Things reading via commit roots that don't have normal protection, | |
376 | * like send, can have a really old block in cache that may point at a | |
01327610 | 377 | * block that has been freed and re-allocated. So don't clear uptodate |
a26e8c9f JB |
378 | * if we find an eb that is under IO (dirty/writeback) because we could |
379 | * end up reading in the stale data and then writing it back out and | |
380 | * making everybody very sad. | |
381 | */ | |
382 | if (!extent_buffer_under_io(eb)) | |
383 | clear_extent_buffer_uptodate(eb); | |
33958dc6 | 384 | out: |
2ac55d41 | 385 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
e43bbe5e | 386 | &cached_state); |
472b909f JB |
387 | if (need_lock) |
388 | btrfs_tree_read_unlock_blocking(eb); | |
1259ab75 | 389 | return ret; |
1259ab75 CM |
390 | } |
391 | ||
1104a885 DS |
392 | /* |
393 | * Return 0 if the superblock checksum type matches the checksum value of that | |
394 | * algorithm. Pass the raw disk superblock data. | |
395 | */ | |
ab8d0fc4 JM |
396 | static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, |
397 | char *raw_disk_sb) | |
1104a885 DS |
398 | { |
399 | struct btrfs_super_block *disk_sb = | |
400 | (struct btrfs_super_block *)raw_disk_sb; | |
401 | u16 csum_type = btrfs_super_csum_type(disk_sb); | |
402 | int ret = 0; | |
403 | ||
404 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { | |
405 | u32 crc = ~(u32)0; | |
406 | const int csum_size = sizeof(crc); | |
407 | char result[csum_size]; | |
408 | ||
409 | /* | |
410 | * The super_block structure does not span the whole | |
411 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space | |
01327610 | 412 | * is filled with zeros and is included in the checksum. |
1104a885 DS |
413 | */ |
414 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, | |
415 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); | |
416 | btrfs_csum_final(crc, result); | |
417 | ||
418 | if (memcmp(raw_disk_sb, result, csum_size)) | |
419 | ret = 1; | |
420 | } | |
421 | ||
422 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { | |
ab8d0fc4 | 423 | btrfs_err(fs_info, "unsupported checksum algorithm %u", |
1104a885 DS |
424 | csum_type); |
425 | ret = 1; | |
426 | } | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
d352ac68 CM |
431 | /* |
432 | * helper to read a given tree block, doing retries as required when | |
433 | * the checksums don't match and we have alternate mirrors to try. | |
434 | */ | |
2ff7e61e | 435 | static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info, |
f188591e | 436 | struct extent_buffer *eb, |
8436ea91 | 437 | u64 parent_transid) |
f188591e CM |
438 | { |
439 | struct extent_io_tree *io_tree; | |
ea466794 | 440 | int failed = 0; |
f188591e CM |
441 | int ret; |
442 | int num_copies = 0; | |
443 | int mirror_num = 0; | |
ea466794 | 444 | int failed_mirror = 0; |
f188591e | 445 | |
a826d6dc | 446 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
0b246afa | 447 | io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree; |
f188591e | 448 | while (1) { |
8436ea91 | 449 | ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE, |
6af49dbd | 450 | mirror_num); |
256dd1bb SB |
451 | if (!ret) { |
452 | if (!verify_parent_transid(io_tree, eb, | |
b9fab919 | 453 | parent_transid, 0)) |
256dd1bb SB |
454 | break; |
455 | else | |
456 | ret = -EIO; | |
457 | } | |
d397712b | 458 | |
a826d6dc JB |
459 | /* |
460 | * This buffer's crc is fine, but its contents are corrupted, so | |
461 | * there is no reason to read the other copies, they won't be | |
462 | * any less wrong. | |
463 | */ | |
464 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) | |
ea466794 JB |
465 | break; |
466 | ||
0b246afa | 467 | num_copies = btrfs_num_copies(fs_info, |
f188591e | 468 | eb->start, eb->len); |
4235298e | 469 | if (num_copies == 1) |
ea466794 | 470 | break; |
4235298e | 471 | |
5cf1ab56 JB |
472 | if (!failed_mirror) { |
473 | failed = 1; | |
474 | failed_mirror = eb->read_mirror; | |
475 | } | |
476 | ||
f188591e | 477 | mirror_num++; |
ea466794 JB |
478 | if (mirror_num == failed_mirror) |
479 | mirror_num++; | |
480 | ||
4235298e | 481 | if (mirror_num > num_copies) |
ea466794 | 482 | break; |
f188591e | 483 | } |
ea466794 | 484 | |
c0901581 | 485 | if (failed && !ret && failed_mirror) |
2ff7e61e | 486 | repair_eb_io_failure(fs_info, eb, failed_mirror); |
ea466794 JB |
487 | |
488 | return ret; | |
f188591e | 489 | } |
19c00ddc | 490 | |
d352ac68 | 491 | /* |
d397712b CM |
492 | * checksum a dirty tree block before IO. This has extra checks to make sure |
493 | * we only fill in the checksum field in the first page of a multi-page block | |
d352ac68 | 494 | */ |
d397712b | 495 | |
01d58472 | 496 | static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) |
19c00ddc | 497 | { |
4eee4fa4 | 498 | u64 start = page_offset(page); |
19c00ddc | 499 | u64 found_start; |
19c00ddc | 500 | struct extent_buffer *eb; |
f188591e | 501 | |
4f2de97a JB |
502 | eb = (struct extent_buffer *)page->private; |
503 | if (page != eb->pages[0]) | |
504 | return 0; | |
0f805531 | 505 | |
19c00ddc | 506 | found_start = btrfs_header_bytenr(eb); |
0f805531 AL |
507 | /* |
508 | * Please do not consolidate these warnings into a single if. | |
509 | * It is useful to know what went wrong. | |
510 | */ | |
511 | if (WARN_ON(found_start != start)) | |
512 | return -EUCLEAN; | |
513 | if (WARN_ON(!PageUptodate(page))) | |
514 | return -EUCLEAN; | |
515 | ||
516 | ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, | |
517 | btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); | |
518 | ||
8bd98f0e | 519 | return csum_tree_block(fs_info, eb, 0); |
19c00ddc CM |
520 | } |
521 | ||
01d58472 | 522 | static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, |
2b82032c YZ |
523 | struct extent_buffer *eb) |
524 | { | |
01d58472 | 525 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
44880fdc | 526 | u8 fsid[BTRFS_FSID_SIZE]; |
2b82032c YZ |
527 | int ret = 1; |
528 | ||
0a4e5586 | 529 | read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); |
2b82032c YZ |
530 | while (fs_devices) { |
531 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { | |
532 | ret = 0; | |
533 | break; | |
534 | } | |
535 | fs_devices = fs_devices->seed; | |
536 | } | |
537 | return ret; | |
538 | } | |
539 | ||
facc8a22 MX |
540 | static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, |
541 | u64 phy_offset, struct page *page, | |
542 | u64 start, u64 end, int mirror) | |
ce9adaa5 | 543 | { |
ce9adaa5 CM |
544 | u64 found_start; |
545 | int found_level; | |
ce9adaa5 CM |
546 | struct extent_buffer *eb; |
547 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
02873e43 | 548 | struct btrfs_fs_info *fs_info = root->fs_info; |
f188591e | 549 | int ret = 0; |
727011e0 | 550 | int reads_done; |
ce9adaa5 | 551 | |
ce9adaa5 CM |
552 | if (!page->private) |
553 | goto out; | |
d397712b | 554 | |
4f2de97a | 555 | eb = (struct extent_buffer *)page->private; |
d397712b | 556 | |
0b32f4bb JB |
557 | /* the pending IO might have been the only thing that kept this buffer |
558 | * in memory. Make sure we have a ref for all this other checks | |
559 | */ | |
560 | extent_buffer_get(eb); | |
561 | ||
562 | reads_done = atomic_dec_and_test(&eb->io_pages); | |
727011e0 CM |
563 | if (!reads_done) |
564 | goto err; | |
f188591e | 565 | |
5cf1ab56 | 566 | eb->read_mirror = mirror; |
656f30db | 567 | if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { |
ea466794 JB |
568 | ret = -EIO; |
569 | goto err; | |
570 | } | |
571 | ||
ce9adaa5 | 572 | found_start = btrfs_header_bytenr(eb); |
727011e0 | 573 | if (found_start != eb->start) { |
02873e43 ZL |
574 | btrfs_err_rl(fs_info, "bad tree block start %llu %llu", |
575 | found_start, eb->start); | |
f188591e | 576 | ret = -EIO; |
ce9adaa5 CM |
577 | goto err; |
578 | } | |
02873e43 ZL |
579 | if (check_tree_block_fsid(fs_info, eb)) { |
580 | btrfs_err_rl(fs_info, "bad fsid on block %llu", | |
581 | eb->start); | |
1259ab75 CM |
582 | ret = -EIO; |
583 | goto err; | |
584 | } | |
ce9adaa5 | 585 | found_level = btrfs_header_level(eb); |
1c24c3ce | 586 | if (found_level >= BTRFS_MAX_LEVEL) { |
02873e43 ZL |
587 | btrfs_err(fs_info, "bad tree block level %d", |
588 | (int)btrfs_header_level(eb)); | |
1c24c3ce JB |
589 | ret = -EIO; |
590 | goto err; | |
591 | } | |
ce9adaa5 | 592 | |
85d4e461 CM |
593 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
594 | eb, found_level); | |
4008c04a | 595 | |
02873e43 | 596 | ret = csum_tree_block(fs_info, eb, 1); |
8bd98f0e | 597 | if (ret) |
a826d6dc | 598 | goto err; |
a826d6dc JB |
599 | |
600 | /* | |
601 | * If this is a leaf block and it is corrupt, set the corrupt bit so | |
602 | * that we don't try and read the other copies of this block, just | |
603 | * return -EIO. | |
604 | */ | |
2f659546 | 605 | if (found_level == 0 && btrfs_check_leaf_full(fs_info, eb)) { |
a826d6dc JB |
606 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
607 | ret = -EIO; | |
608 | } | |
ce9adaa5 | 609 | |
2f659546 | 610 | if (found_level > 0 && btrfs_check_node(fs_info, eb)) |
053ab70f LB |
611 | ret = -EIO; |
612 | ||
0b32f4bb JB |
613 | if (!ret) |
614 | set_extent_buffer_uptodate(eb); | |
ce9adaa5 | 615 | err: |
79fb65a1 JB |
616 | if (reads_done && |
617 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) | |
d48d71aa | 618 | btree_readahead_hook(eb, ret); |
4bb31e92 | 619 | |
53b381b3 DW |
620 | if (ret) { |
621 | /* | |
622 | * our io error hook is going to dec the io pages | |
623 | * again, we have to make sure it has something | |
624 | * to decrement | |
625 | */ | |
626 | atomic_inc(&eb->io_pages); | |
0b32f4bb | 627 | clear_extent_buffer_uptodate(eb); |
53b381b3 | 628 | } |
0b32f4bb | 629 | free_extent_buffer(eb); |
ce9adaa5 | 630 | out: |
f188591e | 631 | return ret; |
ce9adaa5 CM |
632 | } |
633 | ||
ea466794 | 634 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
4bb31e92 | 635 | { |
4bb31e92 | 636 | struct extent_buffer *eb; |
4bb31e92 | 637 | |
4f2de97a | 638 | eb = (struct extent_buffer *)page->private; |
656f30db | 639 | set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); |
5cf1ab56 | 640 | eb->read_mirror = failed_mirror; |
53b381b3 | 641 | atomic_dec(&eb->io_pages); |
ea466794 | 642 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
d48d71aa | 643 | btree_readahead_hook(eb, -EIO); |
4bb31e92 AJ |
644 | return -EIO; /* we fixed nothing */ |
645 | } | |
646 | ||
4246a0b6 | 647 | static void end_workqueue_bio(struct bio *bio) |
ce9adaa5 | 648 | { |
97eb6b69 | 649 | struct btrfs_end_io_wq *end_io_wq = bio->bi_private; |
ce9adaa5 | 650 | struct btrfs_fs_info *fs_info; |
9e0af237 LB |
651 | struct btrfs_workqueue *wq; |
652 | btrfs_work_func_t func; | |
ce9adaa5 | 653 | |
ce9adaa5 | 654 | fs_info = end_io_wq->info; |
4e4cbee9 | 655 | end_io_wq->status = bio->bi_status; |
d20f7043 | 656 | |
37226b21 | 657 | if (bio_op(bio) == REQ_OP_WRITE) { |
9e0af237 LB |
658 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { |
659 | wq = fs_info->endio_meta_write_workers; | |
660 | func = btrfs_endio_meta_write_helper; | |
661 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { | |
662 | wq = fs_info->endio_freespace_worker; | |
663 | func = btrfs_freespace_write_helper; | |
664 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { | |
665 | wq = fs_info->endio_raid56_workers; | |
666 | func = btrfs_endio_raid56_helper; | |
667 | } else { | |
668 | wq = fs_info->endio_write_workers; | |
669 | func = btrfs_endio_write_helper; | |
670 | } | |
d20f7043 | 671 | } else { |
8b110e39 MX |
672 | if (unlikely(end_io_wq->metadata == |
673 | BTRFS_WQ_ENDIO_DIO_REPAIR)) { | |
674 | wq = fs_info->endio_repair_workers; | |
675 | func = btrfs_endio_repair_helper; | |
676 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { | |
9e0af237 LB |
677 | wq = fs_info->endio_raid56_workers; |
678 | func = btrfs_endio_raid56_helper; | |
679 | } else if (end_io_wq->metadata) { | |
680 | wq = fs_info->endio_meta_workers; | |
681 | func = btrfs_endio_meta_helper; | |
682 | } else { | |
683 | wq = fs_info->endio_workers; | |
684 | func = btrfs_endio_helper; | |
685 | } | |
d20f7043 | 686 | } |
9e0af237 LB |
687 | |
688 | btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); | |
689 | btrfs_queue_work(wq, &end_io_wq->work); | |
ce9adaa5 CM |
690 | } |
691 | ||
4e4cbee9 | 692 | blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
bfebd8b5 | 693 | enum btrfs_wq_endio_type metadata) |
0b86a832 | 694 | { |
97eb6b69 | 695 | struct btrfs_end_io_wq *end_io_wq; |
8b110e39 | 696 | |
97eb6b69 | 697 | end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); |
ce9adaa5 | 698 | if (!end_io_wq) |
4e4cbee9 | 699 | return BLK_STS_RESOURCE; |
ce9adaa5 CM |
700 | |
701 | end_io_wq->private = bio->bi_private; | |
702 | end_io_wq->end_io = bio->bi_end_io; | |
22c59948 | 703 | end_io_wq->info = info; |
4e4cbee9 | 704 | end_io_wq->status = 0; |
ce9adaa5 | 705 | end_io_wq->bio = bio; |
22c59948 | 706 | end_io_wq->metadata = metadata; |
ce9adaa5 CM |
707 | |
708 | bio->bi_private = end_io_wq; | |
709 | bio->bi_end_io = end_workqueue_bio; | |
22c59948 CM |
710 | return 0; |
711 | } | |
712 | ||
4a69a410 CM |
713 | static void run_one_async_start(struct btrfs_work *work) |
714 | { | |
4a69a410 | 715 | struct async_submit_bio *async; |
4e4cbee9 | 716 | blk_status_t ret; |
4a69a410 CM |
717 | |
718 | async = container_of(work, struct async_submit_bio, work); | |
c6100a4b | 719 | ret = async->submit_bio_start(async->private_data, async->bio, |
79787eaa JM |
720 | async->mirror_num, async->bio_flags, |
721 | async->bio_offset); | |
722 | if (ret) | |
4e4cbee9 | 723 | async->status = ret; |
4a69a410 CM |
724 | } |
725 | ||
726 | static void run_one_async_done(struct btrfs_work *work) | |
8b712842 | 727 | { |
8b712842 CM |
728 | struct async_submit_bio *async; |
729 | ||
730 | async = container_of(work, struct async_submit_bio, work); | |
4854ddd0 | 731 | |
bb7ab3b9 | 732 | /* If an error occurred we just want to clean up the bio and move on */ |
4e4cbee9 CH |
733 | if (async->status) { |
734 | async->bio->bi_status = async->status; | |
4246a0b6 | 735 | bio_endio(async->bio); |
79787eaa JM |
736 | return; |
737 | } | |
738 | ||
c6100a4b | 739 | async->submit_bio_done(async->private_data, async->bio, async->mirror_num, |
81a75f67 | 740 | async->bio_flags, async->bio_offset); |
4a69a410 CM |
741 | } |
742 | ||
743 | static void run_one_async_free(struct btrfs_work *work) | |
744 | { | |
745 | struct async_submit_bio *async; | |
746 | ||
747 | async = container_of(work, struct async_submit_bio, work); | |
8b712842 CM |
748 | kfree(async); |
749 | } | |
750 | ||
8c27cb35 LT |
751 | blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, |
752 | int mirror_num, unsigned long bio_flags, | |
753 | u64 bio_offset, void *private_data, | |
754 | extent_submit_bio_hook_t *submit_bio_start, | |
755 | extent_submit_bio_hook_t *submit_bio_done) | |
44b8bd7e CM |
756 | { |
757 | struct async_submit_bio *async; | |
758 | ||
759 | async = kmalloc(sizeof(*async), GFP_NOFS); | |
760 | if (!async) | |
4e4cbee9 | 761 | return BLK_STS_RESOURCE; |
44b8bd7e | 762 | |
c6100a4b JB |
763 | async->private_data = private_data; |
764 | async->fs_info = fs_info; | |
44b8bd7e CM |
765 | async->bio = bio; |
766 | async->mirror_num = mirror_num; | |
4a69a410 CM |
767 | async->submit_bio_start = submit_bio_start; |
768 | async->submit_bio_done = submit_bio_done; | |
769 | ||
9e0af237 | 770 | btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, |
5cdc7ad3 | 771 | run_one_async_done, run_one_async_free); |
4a69a410 | 772 | |
c8b97818 | 773 | async->bio_flags = bio_flags; |
eaf25d93 | 774 | async->bio_offset = bio_offset; |
8c8bee1d | 775 | |
4e4cbee9 | 776 | async->status = 0; |
79787eaa | 777 | |
67f055c7 | 778 | if (op_is_sync(bio->bi_opf)) |
5cdc7ad3 | 779 | btrfs_set_work_high_priority(&async->work); |
d313d7a3 | 780 | |
5cdc7ad3 | 781 | btrfs_queue_work(fs_info->workers, &async->work); |
44b8bd7e CM |
782 | return 0; |
783 | } | |
784 | ||
4e4cbee9 | 785 | static blk_status_t btree_csum_one_bio(struct bio *bio) |
ce3ed71a | 786 | { |
2c30c71b | 787 | struct bio_vec *bvec; |
ce3ed71a | 788 | struct btrfs_root *root; |
2c30c71b | 789 | int i, ret = 0; |
ce3ed71a | 790 | |
c09abff8 | 791 | ASSERT(!bio_flagged(bio, BIO_CLONED)); |
2c30c71b | 792 | bio_for_each_segment_all(bvec, bio, i) { |
ce3ed71a | 793 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
01d58472 | 794 | ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); |
79787eaa JM |
795 | if (ret) |
796 | break; | |
ce3ed71a | 797 | } |
2c30c71b | 798 | |
4e4cbee9 | 799 | return errno_to_blk_status(ret); |
ce3ed71a CM |
800 | } |
801 | ||
8c27cb35 LT |
802 | static blk_status_t __btree_submit_bio_start(void *private_data, struct bio *bio, |
803 | int mirror_num, unsigned long bio_flags, | |
804 | u64 bio_offset) | |
22c59948 | 805 | { |
8b712842 CM |
806 | /* |
807 | * when we're called for a write, we're already in the async | |
5443be45 | 808 | * submission context. Just jump into btrfs_map_bio |
8b712842 | 809 | */ |
79787eaa | 810 | return btree_csum_one_bio(bio); |
4a69a410 | 811 | } |
22c59948 | 812 | |
8c27cb35 LT |
813 | static blk_status_t __btree_submit_bio_done(void *private_data, struct bio *bio, |
814 | int mirror_num, unsigned long bio_flags, | |
815 | u64 bio_offset) | |
4a69a410 | 816 | { |
c6100a4b | 817 | struct inode *inode = private_data; |
4e4cbee9 | 818 | blk_status_t ret; |
61891923 | 819 | |
8b712842 | 820 | /* |
4a69a410 CM |
821 | * when we're called for a write, we're already in the async |
822 | * submission context. Just jump into btrfs_map_bio | |
8b712842 | 823 | */ |
2ff7e61e | 824 | ret = btrfs_map_bio(btrfs_sb(inode->i_sb), bio, mirror_num, 1); |
4246a0b6 | 825 | if (ret) { |
4e4cbee9 | 826 | bio->bi_status = ret; |
4246a0b6 CH |
827 | bio_endio(bio); |
828 | } | |
61891923 | 829 | return ret; |
0b86a832 CM |
830 | } |
831 | ||
18fdc679 | 832 | static int check_async_write(struct btrfs_inode *bi) |
de0022b9 | 833 | { |
6300463b LB |
834 | if (atomic_read(&bi->sync_writers)) |
835 | return 0; | |
de0022b9 | 836 | #ifdef CONFIG_X86 |
bc696ca0 | 837 | if (static_cpu_has(X86_FEATURE_XMM4_2)) |
de0022b9 JB |
838 | return 0; |
839 | #endif | |
840 | return 1; | |
841 | } | |
842 | ||
8c27cb35 LT |
843 | static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio, |
844 | int mirror_num, unsigned long bio_flags, | |
845 | u64 bio_offset) | |
44b8bd7e | 846 | { |
c6100a4b | 847 | struct inode *inode = private_data; |
0b246afa | 848 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
18fdc679 | 849 | int async = check_async_write(BTRFS_I(inode)); |
4e4cbee9 | 850 | blk_status_t ret; |
cad321ad | 851 | |
37226b21 | 852 | if (bio_op(bio) != REQ_OP_WRITE) { |
4a69a410 CM |
853 | /* |
854 | * called for a read, do the setup so that checksum validation | |
855 | * can happen in the async kernel threads | |
856 | */ | |
0b246afa JM |
857 | ret = btrfs_bio_wq_end_io(fs_info, bio, |
858 | BTRFS_WQ_ENDIO_METADATA); | |
1d4284bd | 859 | if (ret) |
61891923 | 860 | goto out_w_error; |
2ff7e61e | 861 | ret = btrfs_map_bio(fs_info, bio, mirror_num, 0); |
de0022b9 JB |
862 | } else if (!async) { |
863 | ret = btree_csum_one_bio(bio); | |
864 | if (ret) | |
61891923 | 865 | goto out_w_error; |
2ff7e61e | 866 | ret = btrfs_map_bio(fs_info, bio, mirror_num, 0); |
61891923 SB |
867 | } else { |
868 | /* | |
869 | * kthread helpers are used to submit writes so that | |
870 | * checksumming can happen in parallel across all CPUs | |
871 | */ | |
c6100a4b JB |
872 | ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0, |
873 | bio_offset, private_data, | |
61891923 SB |
874 | __btree_submit_bio_start, |
875 | __btree_submit_bio_done); | |
44b8bd7e | 876 | } |
d313d7a3 | 877 | |
4246a0b6 CH |
878 | if (ret) |
879 | goto out_w_error; | |
880 | return 0; | |
881 | ||
61891923 | 882 | out_w_error: |
4e4cbee9 | 883 | bio->bi_status = ret; |
4246a0b6 | 884 | bio_endio(bio); |
61891923 | 885 | return ret; |
44b8bd7e CM |
886 | } |
887 | ||
3dd1462e | 888 | #ifdef CONFIG_MIGRATION |
784b4e29 | 889 | static int btree_migratepage(struct address_space *mapping, |
a6bc32b8 MG |
890 | struct page *newpage, struct page *page, |
891 | enum migrate_mode mode) | |
784b4e29 CM |
892 | { |
893 | /* | |
894 | * we can't safely write a btree page from here, | |
895 | * we haven't done the locking hook | |
896 | */ | |
897 | if (PageDirty(page)) | |
898 | return -EAGAIN; | |
899 | /* | |
900 | * Buffers may be managed in a filesystem specific way. | |
901 | * We must have no buffers or drop them. | |
902 | */ | |
903 | if (page_has_private(page) && | |
904 | !try_to_release_page(page, GFP_KERNEL)) | |
905 | return -EAGAIN; | |
a6bc32b8 | 906 | return migrate_page(mapping, newpage, page, mode); |
784b4e29 | 907 | } |
3dd1462e | 908 | #endif |
784b4e29 | 909 | |
0da5468f CM |
910 | |
911 | static int btree_writepages(struct address_space *mapping, | |
912 | struct writeback_control *wbc) | |
913 | { | |
e2d84521 MX |
914 | struct btrfs_fs_info *fs_info; |
915 | int ret; | |
916 | ||
d8d5f3e1 | 917 | if (wbc->sync_mode == WB_SYNC_NONE) { |
448d640b CM |
918 | |
919 | if (wbc->for_kupdate) | |
920 | return 0; | |
921 | ||
e2d84521 | 922 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
b9473439 | 923 | /* this is a bit racy, but that's ok */ |
e2d84521 MX |
924 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
925 | BTRFS_DIRTY_METADATA_THRESH); | |
926 | if (ret < 0) | |
793955bc | 927 | return 0; |
793955bc | 928 | } |
0b32f4bb | 929 | return btree_write_cache_pages(mapping, wbc); |
0da5468f CM |
930 | } |
931 | ||
b2950863 | 932 | static int btree_readpage(struct file *file, struct page *page) |
5f39d397 | 933 | { |
d1310b2e CM |
934 | struct extent_io_tree *tree; |
935 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
8ddc7d9c | 936 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
5f39d397 | 937 | } |
22b0ebda | 938 | |
70dec807 | 939 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
5f39d397 | 940 | { |
98509cfc | 941 | if (PageWriteback(page) || PageDirty(page)) |
d397712b | 942 | return 0; |
0c4e538b | 943 | |
f7a52a40 | 944 | return try_release_extent_buffer(page); |
d98237b3 CM |
945 | } |
946 | ||
d47992f8 LC |
947 | static void btree_invalidatepage(struct page *page, unsigned int offset, |
948 | unsigned int length) | |
d98237b3 | 949 | { |
d1310b2e CM |
950 | struct extent_io_tree *tree; |
951 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
952 | extent_invalidatepage(tree, page, offset); |
953 | btree_releasepage(page, GFP_NOFS); | |
9ad6b7bc | 954 | if (PagePrivate(page)) { |
efe120a0 FH |
955 | btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, |
956 | "page private not zero on page %llu", | |
957 | (unsigned long long)page_offset(page)); | |
9ad6b7bc CM |
958 | ClearPagePrivate(page); |
959 | set_page_private(page, 0); | |
09cbfeaf | 960 | put_page(page); |
9ad6b7bc | 961 | } |
d98237b3 CM |
962 | } |
963 | ||
0b32f4bb JB |
964 | static int btree_set_page_dirty(struct page *page) |
965 | { | |
bb146eb2 | 966 | #ifdef DEBUG |
0b32f4bb JB |
967 | struct extent_buffer *eb; |
968 | ||
969 | BUG_ON(!PagePrivate(page)); | |
970 | eb = (struct extent_buffer *)page->private; | |
971 | BUG_ON(!eb); | |
972 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); | |
973 | BUG_ON(!atomic_read(&eb->refs)); | |
974 | btrfs_assert_tree_locked(eb); | |
bb146eb2 | 975 | #endif |
0b32f4bb JB |
976 | return __set_page_dirty_nobuffers(page); |
977 | } | |
978 | ||
7f09410b | 979 | static const struct address_space_operations btree_aops = { |
d98237b3 | 980 | .readpage = btree_readpage, |
0da5468f | 981 | .writepages = btree_writepages, |
5f39d397 CM |
982 | .releasepage = btree_releasepage, |
983 | .invalidatepage = btree_invalidatepage, | |
5a92bc88 | 984 | #ifdef CONFIG_MIGRATION |
784b4e29 | 985 | .migratepage = btree_migratepage, |
5a92bc88 | 986 | #endif |
0b32f4bb | 987 | .set_page_dirty = btree_set_page_dirty, |
d98237b3 CM |
988 | }; |
989 | ||
2ff7e61e | 990 | void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) |
090d1875 | 991 | { |
5f39d397 | 992 | struct extent_buffer *buf = NULL; |
2ff7e61e | 993 | struct inode *btree_inode = fs_info->btree_inode; |
090d1875 | 994 | |
2ff7e61e | 995 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 | 996 | if (IS_ERR(buf)) |
6197d86e | 997 | return; |
d1310b2e | 998 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
6af49dbd | 999 | buf, WAIT_NONE, 0); |
5f39d397 | 1000 | free_extent_buffer(buf); |
090d1875 CM |
1001 | } |
1002 | ||
2ff7e61e | 1003 | int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr, |
ab0fff03 AJ |
1004 | int mirror_num, struct extent_buffer **eb) |
1005 | { | |
1006 | struct extent_buffer *buf = NULL; | |
2ff7e61e | 1007 | struct inode *btree_inode = fs_info->btree_inode; |
ab0fff03 AJ |
1008 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
1009 | int ret; | |
1010 | ||
2ff7e61e | 1011 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 | 1012 | if (IS_ERR(buf)) |
ab0fff03 AJ |
1013 | return 0; |
1014 | ||
1015 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); | |
1016 | ||
8436ea91 | 1017 | ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK, |
6af49dbd | 1018 | mirror_num); |
ab0fff03 AJ |
1019 | if (ret) { |
1020 | free_extent_buffer(buf); | |
1021 | return ret; | |
1022 | } | |
1023 | ||
1024 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { | |
1025 | free_extent_buffer(buf); | |
1026 | return -EIO; | |
0b32f4bb | 1027 | } else if (extent_buffer_uptodate(buf)) { |
ab0fff03 AJ |
1028 | *eb = buf; |
1029 | } else { | |
1030 | free_extent_buffer(buf); | |
1031 | } | |
1032 | return 0; | |
1033 | } | |
1034 | ||
2ff7e61e JM |
1035 | struct extent_buffer *btrfs_find_create_tree_block( |
1036 | struct btrfs_fs_info *fs_info, | |
1037 | u64 bytenr) | |
0999df54 | 1038 | { |
0b246afa JM |
1039 | if (btrfs_is_testing(fs_info)) |
1040 | return alloc_test_extent_buffer(fs_info, bytenr); | |
1041 | return alloc_extent_buffer(fs_info, bytenr); | |
0999df54 CM |
1042 | } |
1043 | ||
1044 | ||
e02119d5 CM |
1045 | int btrfs_write_tree_block(struct extent_buffer *buf) |
1046 | { | |
727011e0 | 1047 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
8aa38c31 | 1048 | buf->start + buf->len - 1); |
e02119d5 CM |
1049 | } |
1050 | ||
3189ff77 | 1051 | void btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
e02119d5 | 1052 | { |
3189ff77 JL |
1053 | filemap_fdatawait_range(buf->pages[0]->mapping, |
1054 | buf->start, buf->start + buf->len - 1); | |
e02119d5 CM |
1055 | } |
1056 | ||
2ff7e61e | 1057 | struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
ce86cd59 | 1058 | u64 parent_transid) |
0999df54 CM |
1059 | { |
1060 | struct extent_buffer *buf = NULL; | |
0999df54 CM |
1061 | int ret; |
1062 | ||
2ff7e61e | 1063 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 LB |
1064 | if (IS_ERR(buf)) |
1065 | return buf; | |
0999df54 | 1066 | |
2ff7e61e | 1067 | ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid); |
0f0fe8f7 FDBM |
1068 | if (ret) { |
1069 | free_extent_buffer(buf); | |
64c043de | 1070 | return ERR_PTR(ret); |
0f0fe8f7 | 1071 | } |
5f39d397 | 1072 | return buf; |
ce9adaa5 | 1073 | |
eb60ceac CM |
1074 | } |
1075 | ||
7c302b49 | 1076 | void clean_tree_block(struct btrfs_fs_info *fs_info, |
d5c13f92 | 1077 | struct extent_buffer *buf) |
ed2ff2cb | 1078 | { |
55c69072 | 1079 | if (btrfs_header_generation(buf) == |
e2d84521 | 1080 | fs_info->running_transaction->transid) { |
b9447ef8 | 1081 | btrfs_assert_tree_locked(buf); |
b4ce94de | 1082 | |
b9473439 | 1083 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
104b4e51 NB |
1084 | percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, |
1085 | -buf->len, | |
1086 | fs_info->dirty_metadata_batch); | |
ed7b63eb JB |
1087 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
1088 | btrfs_set_lock_blocking(buf); | |
1089 | clear_extent_buffer_dirty(buf); | |
1090 | } | |
925baedd | 1091 | } |
5f39d397 CM |
1092 | } |
1093 | ||
8257b2dc MX |
1094 | static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) |
1095 | { | |
1096 | struct btrfs_subvolume_writers *writers; | |
1097 | int ret; | |
1098 | ||
1099 | writers = kmalloc(sizeof(*writers), GFP_NOFS); | |
1100 | if (!writers) | |
1101 | return ERR_PTR(-ENOMEM); | |
1102 | ||
908c7f19 | 1103 | ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); |
8257b2dc MX |
1104 | if (ret < 0) { |
1105 | kfree(writers); | |
1106 | return ERR_PTR(ret); | |
1107 | } | |
1108 | ||
1109 | init_waitqueue_head(&writers->wait); | |
1110 | return writers; | |
1111 | } | |
1112 | ||
1113 | static void | |
1114 | btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) | |
1115 | { | |
1116 | percpu_counter_destroy(&writers->counter); | |
1117 | kfree(writers); | |
1118 | } | |
1119 | ||
da17066c | 1120 | static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, |
143bede5 | 1121 | u64 objectid) |
d97e63b6 | 1122 | { |
7c0260ee | 1123 | bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); |
cfaa7295 | 1124 | root->node = NULL; |
a28ec197 | 1125 | root->commit_root = NULL; |
27cdeb70 | 1126 | root->state = 0; |
d68fc57b | 1127 | root->orphan_cleanup_state = 0; |
0b86a832 | 1128 | |
0f7d52f4 CM |
1129 | root->objectid = objectid; |
1130 | root->last_trans = 0; | |
13a8a7c8 | 1131 | root->highest_objectid = 0; |
eb73c1b7 | 1132 | root->nr_delalloc_inodes = 0; |
199c2a9c | 1133 | root->nr_ordered_extents = 0; |
58176a96 | 1134 | root->name = NULL; |
6bef4d31 | 1135 | root->inode_tree = RB_ROOT; |
16cdcec7 | 1136 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
f0486c68 | 1137 | root->block_rsv = NULL; |
d68fc57b | 1138 | root->orphan_block_rsv = NULL; |
0b86a832 CM |
1139 | |
1140 | INIT_LIST_HEAD(&root->dirty_list); | |
5d4f98a2 | 1141 | INIT_LIST_HEAD(&root->root_list); |
eb73c1b7 MX |
1142 | INIT_LIST_HEAD(&root->delalloc_inodes); |
1143 | INIT_LIST_HEAD(&root->delalloc_root); | |
199c2a9c MX |
1144 | INIT_LIST_HEAD(&root->ordered_extents); |
1145 | INIT_LIST_HEAD(&root->ordered_root); | |
2ab28f32 JB |
1146 | INIT_LIST_HEAD(&root->logged_list[0]); |
1147 | INIT_LIST_HEAD(&root->logged_list[1]); | |
d68fc57b | 1148 | spin_lock_init(&root->orphan_lock); |
5d4f98a2 | 1149 | spin_lock_init(&root->inode_lock); |
eb73c1b7 | 1150 | spin_lock_init(&root->delalloc_lock); |
199c2a9c | 1151 | spin_lock_init(&root->ordered_extent_lock); |
f0486c68 | 1152 | spin_lock_init(&root->accounting_lock); |
2ab28f32 JB |
1153 | spin_lock_init(&root->log_extents_lock[0]); |
1154 | spin_lock_init(&root->log_extents_lock[1]); | |
a2135011 | 1155 | mutex_init(&root->objectid_mutex); |
e02119d5 | 1156 | mutex_init(&root->log_mutex); |
31f3d255 | 1157 | mutex_init(&root->ordered_extent_mutex); |
573bfb72 | 1158 | mutex_init(&root->delalloc_mutex); |
7237f183 YZ |
1159 | init_waitqueue_head(&root->log_writer_wait); |
1160 | init_waitqueue_head(&root->log_commit_wait[0]); | |
1161 | init_waitqueue_head(&root->log_commit_wait[1]); | |
8b050d35 MX |
1162 | INIT_LIST_HEAD(&root->log_ctxs[0]); |
1163 | INIT_LIST_HEAD(&root->log_ctxs[1]); | |
7237f183 YZ |
1164 | atomic_set(&root->log_commit[0], 0); |
1165 | atomic_set(&root->log_commit[1], 0); | |
1166 | atomic_set(&root->log_writers, 0); | |
2ecb7923 | 1167 | atomic_set(&root->log_batch, 0); |
8a35d95f | 1168 | atomic_set(&root->orphan_inodes, 0); |
0700cea7 | 1169 | refcount_set(&root->refs, 1); |
ea14b57f | 1170 | atomic_set(&root->will_be_snapshotted, 0); |
ce0dcee6 | 1171 | atomic64_set(&root->qgroup_meta_rsv, 0); |
7237f183 | 1172 | root->log_transid = 0; |
d1433deb | 1173 | root->log_transid_committed = -1; |
257c62e1 | 1174 | root->last_log_commit = 0; |
7c0260ee | 1175 | if (!dummy) |
c6100a4b | 1176 | extent_io_tree_init(&root->dirty_log_pages, NULL); |
017e5369 | 1177 | |
3768f368 CM |
1178 | memset(&root->root_key, 0, sizeof(root->root_key)); |
1179 | memset(&root->root_item, 0, sizeof(root->root_item)); | |
6702ed49 | 1180 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
7c0260ee | 1181 | if (!dummy) |
06ea65a3 JB |
1182 | root->defrag_trans_start = fs_info->generation; |
1183 | else | |
1184 | root->defrag_trans_start = 0; | |
4d775673 | 1185 | root->root_key.objectid = objectid; |
0ee5dc67 | 1186 | root->anon_dev = 0; |
8ea05e3a | 1187 | |
5f3ab90a | 1188 | spin_lock_init(&root->root_item_lock); |
3768f368 CM |
1189 | } |
1190 | ||
74e4d827 DS |
1191 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, |
1192 | gfp_t flags) | |
6f07e42e | 1193 | { |
74e4d827 | 1194 | struct btrfs_root *root = kzalloc(sizeof(*root), flags); |
6f07e42e AV |
1195 | if (root) |
1196 | root->fs_info = fs_info; | |
1197 | return root; | |
1198 | } | |
1199 | ||
06ea65a3 JB |
1200 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
1201 | /* Should only be used by the testing infrastructure */ | |
da17066c | 1202 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) |
06ea65a3 JB |
1203 | { |
1204 | struct btrfs_root *root; | |
1205 | ||
7c0260ee JM |
1206 | if (!fs_info) |
1207 | return ERR_PTR(-EINVAL); | |
1208 | ||
1209 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); | |
06ea65a3 JB |
1210 | if (!root) |
1211 | return ERR_PTR(-ENOMEM); | |
da17066c | 1212 | |
b9ef22de | 1213 | /* We don't use the stripesize in selftest, set it as sectorsize */ |
da17066c | 1214 | __setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID); |
faa2dbf0 | 1215 | root->alloc_bytenr = 0; |
06ea65a3 JB |
1216 | |
1217 | return root; | |
1218 | } | |
1219 | #endif | |
1220 | ||
20897f5c AJ |
1221 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
1222 | struct btrfs_fs_info *fs_info, | |
1223 | u64 objectid) | |
1224 | { | |
1225 | struct extent_buffer *leaf; | |
1226 | struct btrfs_root *tree_root = fs_info->tree_root; | |
1227 | struct btrfs_root *root; | |
1228 | struct btrfs_key key; | |
1229 | int ret = 0; | |
33d85fda | 1230 | uuid_le uuid = NULL_UUID_LE; |
20897f5c | 1231 | |
74e4d827 | 1232 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
20897f5c AJ |
1233 | if (!root) |
1234 | return ERR_PTR(-ENOMEM); | |
1235 | ||
da17066c | 1236 | __setup_root(root, fs_info, objectid); |
20897f5c AJ |
1237 | root->root_key.objectid = objectid; |
1238 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1239 | root->root_key.offset = 0; | |
1240 | ||
4d75f8a9 | 1241 | leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); |
20897f5c AJ |
1242 | if (IS_ERR(leaf)) { |
1243 | ret = PTR_ERR(leaf); | |
1dd05682 | 1244 | leaf = NULL; |
20897f5c AJ |
1245 | goto fail; |
1246 | } | |
1247 | ||
b159fa28 | 1248 | memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header)); |
20897f5c AJ |
1249 | btrfs_set_header_bytenr(leaf, leaf->start); |
1250 | btrfs_set_header_generation(leaf, trans->transid); | |
1251 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1252 | btrfs_set_header_owner(leaf, objectid); | |
1253 | root->node = leaf; | |
1254 | ||
d24ee97b DS |
1255 | write_extent_buffer_fsid(leaf, fs_info->fsid); |
1256 | write_extent_buffer_chunk_tree_uuid(leaf, fs_info->chunk_tree_uuid); | |
20897f5c AJ |
1257 | btrfs_mark_buffer_dirty(leaf); |
1258 | ||
1259 | root->commit_root = btrfs_root_node(root); | |
27cdeb70 | 1260 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
20897f5c AJ |
1261 | |
1262 | root->root_item.flags = 0; | |
1263 | root->root_item.byte_limit = 0; | |
1264 | btrfs_set_root_bytenr(&root->root_item, leaf->start); | |
1265 | btrfs_set_root_generation(&root->root_item, trans->transid); | |
1266 | btrfs_set_root_level(&root->root_item, 0); | |
1267 | btrfs_set_root_refs(&root->root_item, 1); | |
1268 | btrfs_set_root_used(&root->root_item, leaf->len); | |
1269 | btrfs_set_root_last_snapshot(&root->root_item, 0); | |
1270 | btrfs_set_root_dirid(&root->root_item, 0); | |
33d85fda QW |
1271 | if (is_fstree(objectid)) |
1272 | uuid_le_gen(&uuid); | |
6463fe58 | 1273 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); |
20897f5c AJ |
1274 | root->root_item.drop_level = 0; |
1275 | ||
1276 | key.objectid = objectid; | |
1277 | key.type = BTRFS_ROOT_ITEM_KEY; | |
1278 | key.offset = 0; | |
1279 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); | |
1280 | if (ret) | |
1281 | goto fail; | |
1282 | ||
1283 | btrfs_tree_unlock(leaf); | |
1284 | ||
1dd05682 TI |
1285 | return root; |
1286 | ||
20897f5c | 1287 | fail: |
1dd05682 TI |
1288 | if (leaf) { |
1289 | btrfs_tree_unlock(leaf); | |
59885b39 | 1290 | free_extent_buffer(root->commit_root); |
1dd05682 TI |
1291 | free_extent_buffer(leaf); |
1292 | } | |
1293 | kfree(root); | |
20897f5c | 1294 | |
1dd05682 | 1295 | return ERR_PTR(ret); |
20897f5c AJ |
1296 | } |
1297 | ||
7237f183 YZ |
1298 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
1299 | struct btrfs_fs_info *fs_info) | |
0f7d52f4 CM |
1300 | { |
1301 | struct btrfs_root *root; | |
7237f183 | 1302 | struct extent_buffer *leaf; |
e02119d5 | 1303 | |
74e4d827 | 1304 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
e02119d5 | 1305 | if (!root) |
7237f183 | 1306 | return ERR_PTR(-ENOMEM); |
e02119d5 | 1307 | |
da17066c | 1308 | __setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
e02119d5 CM |
1309 | |
1310 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; | |
1311 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1312 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; | |
27cdeb70 | 1313 | |
7237f183 | 1314 | /* |
27cdeb70 MX |
1315 | * DON'T set REF_COWS for log trees |
1316 | * | |
7237f183 YZ |
1317 | * log trees do not get reference counted because they go away |
1318 | * before a real commit is actually done. They do store pointers | |
1319 | * to file data extents, and those reference counts still get | |
1320 | * updated (along with back refs to the log tree). | |
1321 | */ | |
e02119d5 | 1322 | |
4d75f8a9 DS |
1323 | leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, |
1324 | NULL, 0, 0, 0); | |
7237f183 YZ |
1325 | if (IS_ERR(leaf)) { |
1326 | kfree(root); | |
1327 | return ERR_CAST(leaf); | |
1328 | } | |
e02119d5 | 1329 | |
b159fa28 | 1330 | memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header)); |
5d4f98a2 YZ |
1331 | btrfs_set_header_bytenr(leaf, leaf->start); |
1332 | btrfs_set_header_generation(leaf, trans->transid); | |
1333 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1334 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); | |
7237f183 | 1335 | root->node = leaf; |
e02119d5 | 1336 | |
0b246afa | 1337 | write_extent_buffer_fsid(root->node, fs_info->fsid); |
e02119d5 CM |
1338 | btrfs_mark_buffer_dirty(root->node); |
1339 | btrfs_tree_unlock(root->node); | |
7237f183 YZ |
1340 | return root; |
1341 | } | |
1342 | ||
1343 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
1344 | struct btrfs_fs_info *fs_info) | |
1345 | { | |
1346 | struct btrfs_root *log_root; | |
1347 | ||
1348 | log_root = alloc_log_tree(trans, fs_info); | |
1349 | if (IS_ERR(log_root)) | |
1350 | return PTR_ERR(log_root); | |
1351 | WARN_ON(fs_info->log_root_tree); | |
1352 | fs_info->log_root_tree = log_root; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
1357 | struct btrfs_root *root) | |
1358 | { | |
0b246afa | 1359 | struct btrfs_fs_info *fs_info = root->fs_info; |
7237f183 YZ |
1360 | struct btrfs_root *log_root; |
1361 | struct btrfs_inode_item *inode_item; | |
1362 | ||
0b246afa | 1363 | log_root = alloc_log_tree(trans, fs_info); |
7237f183 YZ |
1364 | if (IS_ERR(log_root)) |
1365 | return PTR_ERR(log_root); | |
1366 | ||
1367 | log_root->last_trans = trans->transid; | |
1368 | log_root->root_key.offset = root->root_key.objectid; | |
1369 | ||
1370 | inode_item = &log_root->root_item.inode; | |
3cae210f QW |
1371 | btrfs_set_stack_inode_generation(inode_item, 1); |
1372 | btrfs_set_stack_inode_size(inode_item, 3); | |
1373 | btrfs_set_stack_inode_nlink(inode_item, 1); | |
da17066c | 1374 | btrfs_set_stack_inode_nbytes(inode_item, |
0b246afa | 1375 | fs_info->nodesize); |
3cae210f | 1376 | btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); |
7237f183 | 1377 | |
5d4f98a2 | 1378 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
7237f183 YZ |
1379 | |
1380 | WARN_ON(root->log_root); | |
1381 | root->log_root = log_root; | |
1382 | root->log_transid = 0; | |
d1433deb | 1383 | root->log_transid_committed = -1; |
257c62e1 | 1384 | root->last_log_commit = 0; |
e02119d5 CM |
1385 | return 0; |
1386 | } | |
1387 | ||
35a3621b SB |
1388 | static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
1389 | struct btrfs_key *key) | |
e02119d5 CM |
1390 | { |
1391 | struct btrfs_root *root; | |
1392 | struct btrfs_fs_info *fs_info = tree_root->fs_info; | |
0f7d52f4 | 1393 | struct btrfs_path *path; |
84234f3a | 1394 | u64 generation; |
cb517eab | 1395 | int ret; |
0f7d52f4 | 1396 | |
cb517eab MX |
1397 | path = btrfs_alloc_path(); |
1398 | if (!path) | |
0f7d52f4 | 1399 | return ERR_PTR(-ENOMEM); |
cb517eab | 1400 | |
74e4d827 | 1401 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
cb517eab MX |
1402 | if (!root) { |
1403 | ret = -ENOMEM; | |
1404 | goto alloc_fail; | |
0f7d52f4 CM |
1405 | } |
1406 | ||
da17066c | 1407 | __setup_root(root, fs_info, key->objectid); |
0f7d52f4 | 1408 | |
cb517eab MX |
1409 | ret = btrfs_find_root(tree_root, key, path, |
1410 | &root->root_item, &root->root_key); | |
0f7d52f4 | 1411 | if (ret) { |
13a8a7c8 YZ |
1412 | if (ret > 0) |
1413 | ret = -ENOENT; | |
cb517eab | 1414 | goto find_fail; |
0f7d52f4 | 1415 | } |
13a8a7c8 | 1416 | |
84234f3a | 1417 | generation = btrfs_root_generation(&root->root_item); |
2ff7e61e JM |
1418 | root->node = read_tree_block(fs_info, |
1419 | btrfs_root_bytenr(&root->root_item), | |
ce86cd59 | 1420 | generation); |
64c043de LB |
1421 | if (IS_ERR(root->node)) { |
1422 | ret = PTR_ERR(root->node); | |
cb517eab MX |
1423 | goto find_fail; |
1424 | } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { | |
1425 | ret = -EIO; | |
64c043de LB |
1426 | free_extent_buffer(root->node); |
1427 | goto find_fail; | |
416bc658 | 1428 | } |
5d4f98a2 | 1429 | root->commit_root = btrfs_root_node(root); |
13a8a7c8 | 1430 | out: |
cb517eab MX |
1431 | btrfs_free_path(path); |
1432 | return root; | |
1433 | ||
cb517eab MX |
1434 | find_fail: |
1435 | kfree(root); | |
1436 | alloc_fail: | |
1437 | root = ERR_PTR(ret); | |
1438 | goto out; | |
1439 | } | |
1440 | ||
1441 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, | |
1442 | struct btrfs_key *location) | |
1443 | { | |
1444 | struct btrfs_root *root; | |
1445 | ||
1446 | root = btrfs_read_tree_root(tree_root, location); | |
1447 | if (IS_ERR(root)) | |
1448 | return root; | |
1449 | ||
1450 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { | |
27cdeb70 | 1451 | set_bit(BTRFS_ROOT_REF_COWS, &root->state); |
08fe4db1 LZ |
1452 | btrfs_check_and_init_root_item(&root->root_item); |
1453 | } | |
13a8a7c8 | 1454 | |
5eda7b5e CM |
1455 | return root; |
1456 | } | |
1457 | ||
cb517eab MX |
1458 | int btrfs_init_fs_root(struct btrfs_root *root) |
1459 | { | |
1460 | int ret; | |
8257b2dc | 1461 | struct btrfs_subvolume_writers *writers; |
cb517eab MX |
1462 | |
1463 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); | |
1464 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), | |
1465 | GFP_NOFS); | |
1466 | if (!root->free_ino_pinned || !root->free_ino_ctl) { | |
1467 | ret = -ENOMEM; | |
1468 | goto fail; | |
1469 | } | |
1470 | ||
8257b2dc MX |
1471 | writers = btrfs_alloc_subvolume_writers(); |
1472 | if (IS_ERR(writers)) { | |
1473 | ret = PTR_ERR(writers); | |
1474 | goto fail; | |
1475 | } | |
1476 | root->subv_writers = writers; | |
1477 | ||
cb517eab | 1478 | btrfs_init_free_ino_ctl(root); |
57cdc8db DS |
1479 | spin_lock_init(&root->ino_cache_lock); |
1480 | init_waitqueue_head(&root->ino_cache_wait); | |
cb517eab MX |
1481 | |
1482 | ret = get_anon_bdev(&root->anon_dev); | |
1483 | if (ret) | |
876d2cf1 | 1484 | goto fail; |
f32e48e9 CR |
1485 | |
1486 | mutex_lock(&root->objectid_mutex); | |
1487 | ret = btrfs_find_highest_objectid(root, | |
1488 | &root->highest_objectid); | |
1489 | if (ret) { | |
1490 | mutex_unlock(&root->objectid_mutex); | |
876d2cf1 | 1491 | goto fail; |
f32e48e9 CR |
1492 | } |
1493 | ||
1494 | ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); | |
1495 | ||
1496 | mutex_unlock(&root->objectid_mutex); | |
1497 | ||
cb517eab MX |
1498 | return 0; |
1499 | fail: | |
876d2cf1 | 1500 | /* the caller is responsible to call free_fs_root */ |
cb517eab MX |
1501 | return ret; |
1502 | } | |
1503 | ||
35bbb97f JM |
1504 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
1505 | u64 root_id) | |
cb517eab MX |
1506 | { |
1507 | struct btrfs_root *root; | |
1508 | ||
1509 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1510 | root = radix_tree_lookup(&fs_info->fs_roots_radix, | |
1511 | (unsigned long)root_id); | |
1512 | spin_unlock(&fs_info->fs_roots_radix_lock); | |
1513 | return root; | |
1514 | } | |
1515 | ||
1516 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, | |
1517 | struct btrfs_root *root) | |
1518 | { | |
1519 | int ret; | |
1520 | ||
e1860a77 | 1521 | ret = radix_tree_preload(GFP_NOFS); |
cb517eab MX |
1522 | if (ret) |
1523 | return ret; | |
1524 | ||
1525 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1526 | ret = radix_tree_insert(&fs_info->fs_roots_radix, | |
1527 | (unsigned long)root->root_key.objectid, | |
1528 | root); | |
1529 | if (ret == 0) | |
27cdeb70 | 1530 | set_bit(BTRFS_ROOT_IN_RADIX, &root->state); |
cb517eab MX |
1531 | spin_unlock(&fs_info->fs_roots_radix_lock); |
1532 | radix_tree_preload_end(); | |
1533 | ||
1534 | return ret; | |
1535 | } | |
1536 | ||
c00869f1 MX |
1537 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
1538 | struct btrfs_key *location, | |
1539 | bool check_ref) | |
5eda7b5e CM |
1540 | { |
1541 | struct btrfs_root *root; | |
381cf658 | 1542 | struct btrfs_path *path; |
1d4c08e0 | 1543 | struct btrfs_key key; |
5eda7b5e CM |
1544 | int ret; |
1545 | ||
edbd8d4e CM |
1546 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
1547 | return fs_info->tree_root; | |
1548 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
1549 | return fs_info->extent_root; | |
8f18cf13 CM |
1550 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
1551 | return fs_info->chunk_root; | |
1552 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) | |
1553 | return fs_info->dev_root; | |
0403e47e YZ |
1554 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
1555 | return fs_info->csum_root; | |
bcef60f2 AJ |
1556 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
1557 | return fs_info->quota_root ? fs_info->quota_root : | |
1558 | ERR_PTR(-ENOENT); | |
f7a81ea4 SB |
1559 | if (location->objectid == BTRFS_UUID_TREE_OBJECTID) |
1560 | return fs_info->uuid_root ? fs_info->uuid_root : | |
1561 | ERR_PTR(-ENOENT); | |
70f6d82e OS |
1562 | if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) |
1563 | return fs_info->free_space_root ? fs_info->free_space_root : | |
1564 | ERR_PTR(-ENOENT); | |
4df27c4d | 1565 | again: |
cb517eab | 1566 | root = btrfs_lookup_fs_root(fs_info, location->objectid); |
48475471 | 1567 | if (root) { |
c00869f1 | 1568 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) |
48475471 | 1569 | return ERR_PTR(-ENOENT); |
5eda7b5e | 1570 | return root; |
48475471 | 1571 | } |
5eda7b5e | 1572 | |
cb517eab | 1573 | root = btrfs_read_fs_root(fs_info->tree_root, location); |
5eda7b5e CM |
1574 | if (IS_ERR(root)) |
1575 | return root; | |
3394e160 | 1576 | |
c00869f1 | 1577 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) { |
cb517eab | 1578 | ret = -ENOENT; |
581bb050 | 1579 | goto fail; |
35a30d7c | 1580 | } |
581bb050 | 1581 | |
cb517eab | 1582 | ret = btrfs_init_fs_root(root); |
ac08aedf CM |
1583 | if (ret) |
1584 | goto fail; | |
3394e160 | 1585 | |
381cf658 DS |
1586 | path = btrfs_alloc_path(); |
1587 | if (!path) { | |
1588 | ret = -ENOMEM; | |
1589 | goto fail; | |
1590 | } | |
1d4c08e0 DS |
1591 | key.objectid = BTRFS_ORPHAN_OBJECTID; |
1592 | key.type = BTRFS_ORPHAN_ITEM_KEY; | |
1593 | key.offset = location->objectid; | |
1594 | ||
1595 | ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); | |
381cf658 | 1596 | btrfs_free_path(path); |
d68fc57b YZ |
1597 | if (ret < 0) |
1598 | goto fail; | |
1599 | if (ret == 0) | |
27cdeb70 | 1600 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
d68fc57b | 1601 | |
cb517eab | 1602 | ret = btrfs_insert_fs_root(fs_info, root); |
0f7d52f4 | 1603 | if (ret) { |
4df27c4d YZ |
1604 | if (ret == -EEXIST) { |
1605 | free_fs_root(root); | |
1606 | goto again; | |
1607 | } | |
1608 | goto fail; | |
0f7d52f4 | 1609 | } |
edbd8d4e | 1610 | return root; |
4df27c4d YZ |
1611 | fail: |
1612 | free_fs_root(root); | |
1613 | return ERR_PTR(ret); | |
edbd8d4e CM |
1614 | } |
1615 | ||
04160088 CM |
1616 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
1617 | { | |
1618 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; | |
1619 | int ret = 0; | |
04160088 CM |
1620 | struct btrfs_device *device; |
1621 | struct backing_dev_info *bdi; | |
b7967db7 | 1622 | |
1f78160c XG |
1623 | rcu_read_lock(); |
1624 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { | |
dfe25020 CM |
1625 | if (!device->bdev) |
1626 | continue; | |
efa7c9f9 | 1627 | bdi = device->bdev->bd_bdi; |
ff9ea323 | 1628 | if (bdi_congested(bdi, bdi_bits)) { |
04160088 CM |
1629 | ret = 1; |
1630 | break; | |
1631 | } | |
1632 | } | |
1f78160c | 1633 | rcu_read_unlock(); |
04160088 CM |
1634 | return ret; |
1635 | } | |
1636 | ||
8b712842 CM |
1637 | /* |
1638 | * called by the kthread helper functions to finally call the bio end_io | |
1639 | * functions. This is where read checksum verification actually happens | |
1640 | */ | |
1641 | static void end_workqueue_fn(struct btrfs_work *work) | |
ce9adaa5 | 1642 | { |
ce9adaa5 | 1643 | struct bio *bio; |
97eb6b69 | 1644 | struct btrfs_end_io_wq *end_io_wq; |
ce9adaa5 | 1645 | |
97eb6b69 | 1646 | end_io_wq = container_of(work, struct btrfs_end_io_wq, work); |
8b712842 | 1647 | bio = end_io_wq->bio; |
ce9adaa5 | 1648 | |
4e4cbee9 | 1649 | bio->bi_status = end_io_wq->status; |
8b712842 CM |
1650 | bio->bi_private = end_io_wq->private; |
1651 | bio->bi_end_io = end_io_wq->end_io; | |
97eb6b69 | 1652 | kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); |
4246a0b6 | 1653 | bio_endio(bio); |
44b8bd7e CM |
1654 | } |
1655 | ||
a74a4b97 CM |
1656 | static int cleaner_kthread(void *arg) |
1657 | { | |
1658 | struct btrfs_root *root = arg; | |
0b246afa | 1659 | struct btrfs_fs_info *fs_info = root->fs_info; |
d0278245 | 1660 | int again; |
da288d28 | 1661 | struct btrfs_trans_handle *trans; |
a74a4b97 CM |
1662 | |
1663 | do { | |
d0278245 | 1664 | again = 0; |
a74a4b97 | 1665 | |
d0278245 | 1666 | /* Make the cleaner go to sleep early. */ |
2ff7e61e | 1667 | if (btrfs_need_cleaner_sleep(fs_info)) |
d0278245 MX |
1668 | goto sleep; |
1669 | ||
90c711ab ZB |
1670 | /* |
1671 | * Do not do anything if we might cause open_ctree() to block | |
1672 | * before we have finished mounting the filesystem. | |
1673 | */ | |
0b246afa | 1674 | if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) |
90c711ab ZB |
1675 | goto sleep; |
1676 | ||
0b246afa | 1677 | if (!mutex_trylock(&fs_info->cleaner_mutex)) |
d0278245 MX |
1678 | goto sleep; |
1679 | ||
dc7f370c MX |
1680 | /* |
1681 | * Avoid the problem that we change the status of the fs | |
1682 | * during the above check and trylock. | |
1683 | */ | |
2ff7e61e | 1684 | if (btrfs_need_cleaner_sleep(fs_info)) { |
0b246afa | 1685 | mutex_unlock(&fs_info->cleaner_mutex); |
dc7f370c | 1686 | goto sleep; |
76dda93c | 1687 | } |
a74a4b97 | 1688 | |
0b246afa | 1689 | mutex_lock(&fs_info->cleaner_delayed_iput_mutex); |
2ff7e61e | 1690 | btrfs_run_delayed_iputs(fs_info); |
0b246afa | 1691 | mutex_unlock(&fs_info->cleaner_delayed_iput_mutex); |
c2d6cb16 | 1692 | |
d0278245 | 1693 | again = btrfs_clean_one_deleted_snapshot(root); |
0b246afa | 1694 | mutex_unlock(&fs_info->cleaner_mutex); |
d0278245 MX |
1695 | |
1696 | /* | |
05323cd1 MX |
1697 | * The defragger has dealt with the R/O remount and umount, |
1698 | * needn't do anything special here. | |
d0278245 | 1699 | */ |
0b246afa | 1700 | btrfs_run_defrag_inodes(fs_info); |
67c5e7d4 FM |
1701 | |
1702 | /* | |
1703 | * Acquires fs_info->delete_unused_bgs_mutex to avoid racing | |
1704 | * with relocation (btrfs_relocate_chunk) and relocation | |
1705 | * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) | |
1706 | * after acquiring fs_info->delete_unused_bgs_mutex. So we | |
1707 | * can't hold, nor need to, fs_info->cleaner_mutex when deleting | |
1708 | * unused block groups. | |
1709 | */ | |
0b246afa | 1710 | btrfs_delete_unused_bgs(fs_info); |
d0278245 | 1711 | sleep: |
838fe188 | 1712 | if (!again) { |
a74a4b97 | 1713 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa YZ |
1714 | if (!kthread_should_stop()) |
1715 | schedule(); | |
a74a4b97 CM |
1716 | __set_current_state(TASK_RUNNING); |
1717 | } | |
1718 | } while (!kthread_should_stop()); | |
da288d28 FM |
1719 | |
1720 | /* | |
1721 | * Transaction kthread is stopped before us and wakes us up. | |
1722 | * However we might have started a new transaction and COWed some | |
1723 | * tree blocks when deleting unused block groups for example. So | |
1724 | * make sure we commit the transaction we started to have a clean | |
1725 | * shutdown when evicting the btree inode - if it has dirty pages | |
1726 | * when we do the final iput() on it, eviction will trigger a | |
1727 | * writeback for it which will fail with null pointer dereferences | |
1728 | * since work queues and other resources were already released and | |
1729 | * destroyed by the time the iput/eviction/writeback is made. | |
1730 | */ | |
1731 | trans = btrfs_attach_transaction(root); | |
1732 | if (IS_ERR(trans)) { | |
1733 | if (PTR_ERR(trans) != -ENOENT) | |
0b246afa | 1734 | btrfs_err(fs_info, |
da288d28 FM |
1735 | "cleaner transaction attach returned %ld", |
1736 | PTR_ERR(trans)); | |
1737 | } else { | |
1738 | int ret; | |
1739 | ||
3a45bb20 | 1740 | ret = btrfs_commit_transaction(trans); |
da288d28 | 1741 | if (ret) |
0b246afa | 1742 | btrfs_err(fs_info, |
da288d28 FM |
1743 | "cleaner open transaction commit returned %d", |
1744 | ret); | |
1745 | } | |
1746 | ||
a74a4b97 CM |
1747 | return 0; |
1748 | } | |
1749 | ||
1750 | static int transaction_kthread(void *arg) | |
1751 | { | |
1752 | struct btrfs_root *root = arg; | |
0b246afa | 1753 | struct btrfs_fs_info *fs_info = root->fs_info; |
a74a4b97 CM |
1754 | struct btrfs_trans_handle *trans; |
1755 | struct btrfs_transaction *cur; | |
8929ecfa | 1756 | u64 transid; |
a74a4b97 CM |
1757 | unsigned long now; |
1758 | unsigned long delay; | |
914b2007 | 1759 | bool cannot_commit; |
a74a4b97 CM |
1760 | |
1761 | do { | |
914b2007 | 1762 | cannot_commit = false; |
0b246afa JM |
1763 | delay = HZ * fs_info->commit_interval; |
1764 | mutex_lock(&fs_info->transaction_kthread_mutex); | |
a74a4b97 | 1765 | |
0b246afa JM |
1766 | spin_lock(&fs_info->trans_lock); |
1767 | cur = fs_info->running_transaction; | |
a74a4b97 | 1768 | if (!cur) { |
0b246afa | 1769 | spin_unlock(&fs_info->trans_lock); |
a74a4b97 CM |
1770 | goto sleep; |
1771 | } | |
31153d81 | 1772 | |
a74a4b97 | 1773 | now = get_seconds(); |
4a9d8bde | 1774 | if (cur->state < TRANS_STATE_BLOCKED && |
8b87dc17 | 1775 | (now < cur->start_time || |
0b246afa JM |
1776 | now - cur->start_time < fs_info->commit_interval)) { |
1777 | spin_unlock(&fs_info->trans_lock); | |
a74a4b97 CM |
1778 | delay = HZ * 5; |
1779 | goto sleep; | |
1780 | } | |
8929ecfa | 1781 | transid = cur->transid; |
0b246afa | 1782 | spin_unlock(&fs_info->trans_lock); |
56bec294 | 1783 | |
79787eaa | 1784 | /* If the file system is aborted, this will always fail. */ |
354aa0fb | 1785 | trans = btrfs_attach_transaction(root); |
914b2007 | 1786 | if (IS_ERR(trans)) { |
354aa0fb MX |
1787 | if (PTR_ERR(trans) != -ENOENT) |
1788 | cannot_commit = true; | |
79787eaa | 1789 | goto sleep; |
914b2007 | 1790 | } |
8929ecfa | 1791 | if (transid == trans->transid) { |
3a45bb20 | 1792 | btrfs_commit_transaction(trans); |
8929ecfa | 1793 | } else { |
3a45bb20 | 1794 | btrfs_end_transaction(trans); |
8929ecfa | 1795 | } |
a74a4b97 | 1796 | sleep: |
0b246afa JM |
1797 | wake_up_process(fs_info->cleaner_kthread); |
1798 | mutex_unlock(&fs_info->transaction_kthread_mutex); | |
a74a4b97 | 1799 | |
4e121c06 | 1800 | if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, |
0b246afa | 1801 | &fs_info->fs_state))) |
2ff7e61e | 1802 | btrfs_cleanup_transaction(fs_info); |
ce63f891 | 1803 | if (!kthread_should_stop() && |
0b246afa | 1804 | (!btrfs_transaction_blocked(fs_info) || |
ce63f891 | 1805 | cannot_commit)) |
bc5511d0 | 1806 | schedule_timeout_interruptible(delay); |
a74a4b97 CM |
1807 | } while (!kthread_should_stop()); |
1808 | return 0; | |
1809 | } | |
1810 | ||
af31f5e5 CM |
1811 | /* |
1812 | * this will find the highest generation in the array of | |
1813 | * root backups. The index of the highest array is returned, | |
1814 | * or -1 if we can't find anything. | |
1815 | * | |
1816 | * We check to make sure the array is valid by comparing the | |
1817 | * generation of the latest root in the array with the generation | |
1818 | * in the super block. If they don't match we pitch it. | |
1819 | */ | |
1820 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) | |
1821 | { | |
1822 | u64 cur; | |
1823 | int newest_index = -1; | |
1824 | struct btrfs_root_backup *root_backup; | |
1825 | int i; | |
1826 | ||
1827 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { | |
1828 | root_backup = info->super_copy->super_roots + i; | |
1829 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1830 | if (cur == newest_gen) | |
1831 | newest_index = i; | |
1832 | } | |
1833 | ||
1834 | /* check to see if we actually wrapped around */ | |
1835 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { | |
1836 | root_backup = info->super_copy->super_roots; | |
1837 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1838 | if (cur == newest_gen) | |
1839 | newest_index = 0; | |
1840 | } | |
1841 | return newest_index; | |
1842 | } | |
1843 | ||
1844 | ||
1845 | /* | |
1846 | * find the oldest backup so we know where to store new entries | |
1847 | * in the backup array. This will set the backup_root_index | |
1848 | * field in the fs_info struct | |
1849 | */ | |
1850 | static void find_oldest_super_backup(struct btrfs_fs_info *info, | |
1851 | u64 newest_gen) | |
1852 | { | |
1853 | int newest_index = -1; | |
1854 | ||
1855 | newest_index = find_newest_super_backup(info, newest_gen); | |
1856 | /* if there was garbage in there, just move along */ | |
1857 | if (newest_index == -1) { | |
1858 | info->backup_root_index = 0; | |
1859 | } else { | |
1860 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | /* | |
1865 | * copy all the root pointers into the super backup array. | |
1866 | * this will bump the backup pointer by one when it is | |
1867 | * done | |
1868 | */ | |
1869 | static void backup_super_roots(struct btrfs_fs_info *info) | |
1870 | { | |
1871 | int next_backup; | |
1872 | struct btrfs_root_backup *root_backup; | |
1873 | int last_backup; | |
1874 | ||
1875 | next_backup = info->backup_root_index; | |
1876 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
1877 | BTRFS_NUM_BACKUP_ROOTS; | |
1878 | ||
1879 | /* | |
1880 | * just overwrite the last backup if we're at the same generation | |
1881 | * this happens only at umount | |
1882 | */ | |
1883 | root_backup = info->super_for_commit->super_roots + last_backup; | |
1884 | if (btrfs_backup_tree_root_gen(root_backup) == | |
1885 | btrfs_header_generation(info->tree_root->node)) | |
1886 | next_backup = last_backup; | |
1887 | ||
1888 | root_backup = info->super_for_commit->super_roots + next_backup; | |
1889 | ||
1890 | /* | |
1891 | * make sure all of our padding and empty slots get zero filled | |
1892 | * regardless of which ones we use today | |
1893 | */ | |
1894 | memset(root_backup, 0, sizeof(*root_backup)); | |
1895 | ||
1896 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1897 | ||
1898 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); | |
1899 | btrfs_set_backup_tree_root_gen(root_backup, | |
1900 | btrfs_header_generation(info->tree_root->node)); | |
1901 | ||
1902 | btrfs_set_backup_tree_root_level(root_backup, | |
1903 | btrfs_header_level(info->tree_root->node)); | |
1904 | ||
1905 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); | |
1906 | btrfs_set_backup_chunk_root_gen(root_backup, | |
1907 | btrfs_header_generation(info->chunk_root->node)); | |
1908 | btrfs_set_backup_chunk_root_level(root_backup, | |
1909 | btrfs_header_level(info->chunk_root->node)); | |
1910 | ||
1911 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); | |
1912 | btrfs_set_backup_extent_root_gen(root_backup, | |
1913 | btrfs_header_generation(info->extent_root->node)); | |
1914 | btrfs_set_backup_extent_root_level(root_backup, | |
1915 | btrfs_header_level(info->extent_root->node)); | |
1916 | ||
7c7e82a7 CM |
1917 | /* |
1918 | * we might commit during log recovery, which happens before we set | |
1919 | * the fs_root. Make sure it is valid before we fill it in. | |
1920 | */ | |
1921 | if (info->fs_root && info->fs_root->node) { | |
1922 | btrfs_set_backup_fs_root(root_backup, | |
1923 | info->fs_root->node->start); | |
1924 | btrfs_set_backup_fs_root_gen(root_backup, | |
af31f5e5 | 1925 | btrfs_header_generation(info->fs_root->node)); |
7c7e82a7 | 1926 | btrfs_set_backup_fs_root_level(root_backup, |
af31f5e5 | 1927 | btrfs_header_level(info->fs_root->node)); |
7c7e82a7 | 1928 | } |
af31f5e5 CM |
1929 | |
1930 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); | |
1931 | btrfs_set_backup_dev_root_gen(root_backup, | |
1932 | btrfs_header_generation(info->dev_root->node)); | |
1933 | btrfs_set_backup_dev_root_level(root_backup, | |
1934 | btrfs_header_level(info->dev_root->node)); | |
1935 | ||
1936 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); | |
1937 | btrfs_set_backup_csum_root_gen(root_backup, | |
1938 | btrfs_header_generation(info->csum_root->node)); | |
1939 | btrfs_set_backup_csum_root_level(root_backup, | |
1940 | btrfs_header_level(info->csum_root->node)); | |
1941 | ||
1942 | btrfs_set_backup_total_bytes(root_backup, | |
1943 | btrfs_super_total_bytes(info->super_copy)); | |
1944 | btrfs_set_backup_bytes_used(root_backup, | |
1945 | btrfs_super_bytes_used(info->super_copy)); | |
1946 | btrfs_set_backup_num_devices(root_backup, | |
1947 | btrfs_super_num_devices(info->super_copy)); | |
1948 | ||
1949 | /* | |
1950 | * if we don't copy this out to the super_copy, it won't get remembered | |
1951 | * for the next commit | |
1952 | */ | |
1953 | memcpy(&info->super_copy->super_roots, | |
1954 | &info->super_for_commit->super_roots, | |
1955 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); | |
1956 | } | |
1957 | ||
1958 | /* | |
1959 | * this copies info out of the root backup array and back into | |
1960 | * the in-memory super block. It is meant to help iterate through | |
1961 | * the array, so you send it the number of backups you've already | |
1962 | * tried and the last backup index you used. | |
1963 | * | |
1964 | * this returns -1 when it has tried all the backups | |
1965 | */ | |
1966 | static noinline int next_root_backup(struct btrfs_fs_info *info, | |
1967 | struct btrfs_super_block *super, | |
1968 | int *num_backups_tried, int *backup_index) | |
1969 | { | |
1970 | struct btrfs_root_backup *root_backup; | |
1971 | int newest = *backup_index; | |
1972 | ||
1973 | if (*num_backups_tried == 0) { | |
1974 | u64 gen = btrfs_super_generation(super); | |
1975 | ||
1976 | newest = find_newest_super_backup(info, gen); | |
1977 | if (newest == -1) | |
1978 | return -1; | |
1979 | ||
1980 | *backup_index = newest; | |
1981 | *num_backups_tried = 1; | |
1982 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { | |
1983 | /* we've tried all the backups, all done */ | |
1984 | return -1; | |
1985 | } else { | |
1986 | /* jump to the next oldest backup */ | |
1987 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
1988 | BTRFS_NUM_BACKUP_ROOTS; | |
1989 | *backup_index = newest; | |
1990 | *num_backups_tried += 1; | |
1991 | } | |
1992 | root_backup = super->super_roots + newest; | |
1993 | ||
1994 | btrfs_set_super_generation(super, | |
1995 | btrfs_backup_tree_root_gen(root_backup)); | |
1996 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); | |
1997 | btrfs_set_super_root_level(super, | |
1998 | btrfs_backup_tree_root_level(root_backup)); | |
1999 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); | |
2000 | ||
2001 | /* | |
2002 | * fixme: the total bytes and num_devices need to match or we should | |
2003 | * need a fsck | |
2004 | */ | |
2005 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); | |
2006 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); | |
2007 | return 0; | |
2008 | } | |
2009 | ||
7abadb64 LB |
2010 | /* helper to cleanup workers */ |
2011 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) | |
2012 | { | |
dc6e3209 | 2013 | btrfs_destroy_workqueue(fs_info->fixup_workers); |
afe3d242 | 2014 | btrfs_destroy_workqueue(fs_info->delalloc_workers); |
5cdc7ad3 | 2015 | btrfs_destroy_workqueue(fs_info->workers); |
fccb5d86 | 2016 | btrfs_destroy_workqueue(fs_info->endio_workers); |
fccb5d86 | 2017 | btrfs_destroy_workqueue(fs_info->endio_raid56_workers); |
8b110e39 | 2018 | btrfs_destroy_workqueue(fs_info->endio_repair_workers); |
d05a33ac | 2019 | btrfs_destroy_workqueue(fs_info->rmw_workers); |
fccb5d86 QW |
2020 | btrfs_destroy_workqueue(fs_info->endio_write_workers); |
2021 | btrfs_destroy_workqueue(fs_info->endio_freespace_worker); | |
a8c93d4e | 2022 | btrfs_destroy_workqueue(fs_info->submit_workers); |
5b3bc44e | 2023 | btrfs_destroy_workqueue(fs_info->delayed_workers); |
e66f0bb1 | 2024 | btrfs_destroy_workqueue(fs_info->caching_workers); |
736cfa15 | 2025 | btrfs_destroy_workqueue(fs_info->readahead_workers); |
a44903ab | 2026 | btrfs_destroy_workqueue(fs_info->flush_workers); |
fc97fab0 | 2027 | btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); |
a79b7d4b | 2028 | btrfs_destroy_workqueue(fs_info->extent_workers); |
a9b9477d FM |
2029 | /* |
2030 | * Now that all other work queues are destroyed, we can safely destroy | |
2031 | * the queues used for metadata I/O, since tasks from those other work | |
2032 | * queues can do metadata I/O operations. | |
2033 | */ | |
2034 | btrfs_destroy_workqueue(fs_info->endio_meta_workers); | |
2035 | btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); | |
7abadb64 LB |
2036 | } |
2037 | ||
2e9f5954 R |
2038 | static void free_root_extent_buffers(struct btrfs_root *root) |
2039 | { | |
2040 | if (root) { | |
2041 | free_extent_buffer(root->node); | |
2042 | free_extent_buffer(root->commit_root); | |
2043 | root->node = NULL; | |
2044 | root->commit_root = NULL; | |
2045 | } | |
2046 | } | |
2047 | ||
af31f5e5 CM |
2048 | /* helper to cleanup tree roots */ |
2049 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) | |
2050 | { | |
2e9f5954 | 2051 | free_root_extent_buffers(info->tree_root); |
655b09fe | 2052 | |
2e9f5954 R |
2053 | free_root_extent_buffers(info->dev_root); |
2054 | free_root_extent_buffers(info->extent_root); | |
2055 | free_root_extent_buffers(info->csum_root); | |
2056 | free_root_extent_buffers(info->quota_root); | |
2057 | free_root_extent_buffers(info->uuid_root); | |
2058 | if (chunk_root) | |
2059 | free_root_extent_buffers(info->chunk_root); | |
70f6d82e | 2060 | free_root_extent_buffers(info->free_space_root); |
af31f5e5 CM |
2061 | } |
2062 | ||
faa2dbf0 | 2063 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) |
171f6537 JB |
2064 | { |
2065 | int ret; | |
2066 | struct btrfs_root *gang[8]; | |
2067 | int i; | |
2068 | ||
2069 | while (!list_empty(&fs_info->dead_roots)) { | |
2070 | gang[0] = list_entry(fs_info->dead_roots.next, | |
2071 | struct btrfs_root, root_list); | |
2072 | list_del(&gang[0]->root_list); | |
2073 | ||
27cdeb70 | 2074 | if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { |
cb517eab | 2075 | btrfs_drop_and_free_fs_root(fs_info, gang[0]); |
171f6537 JB |
2076 | } else { |
2077 | free_extent_buffer(gang[0]->node); | |
2078 | free_extent_buffer(gang[0]->commit_root); | |
b0feb9d9 | 2079 | btrfs_put_fs_root(gang[0]); |
171f6537 JB |
2080 | } |
2081 | } | |
2082 | ||
2083 | while (1) { | |
2084 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
2085 | (void **)gang, 0, | |
2086 | ARRAY_SIZE(gang)); | |
2087 | if (!ret) | |
2088 | break; | |
2089 | for (i = 0; i < ret; i++) | |
cb517eab | 2090 | btrfs_drop_and_free_fs_root(fs_info, gang[i]); |
171f6537 | 2091 | } |
1a4319cc LB |
2092 | |
2093 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { | |
2094 | btrfs_free_log_root_tree(NULL, fs_info); | |
2ff7e61e | 2095 | btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); |
1a4319cc | 2096 | } |
171f6537 | 2097 | } |
af31f5e5 | 2098 | |
638aa7ed ES |
2099 | static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) |
2100 | { | |
2101 | mutex_init(&fs_info->scrub_lock); | |
2102 | atomic_set(&fs_info->scrubs_running, 0); | |
2103 | atomic_set(&fs_info->scrub_pause_req, 0); | |
2104 | atomic_set(&fs_info->scrubs_paused, 0); | |
2105 | atomic_set(&fs_info->scrub_cancel_req, 0); | |
2106 | init_waitqueue_head(&fs_info->scrub_pause_wait); | |
2107 | fs_info->scrub_workers_refcnt = 0; | |
2108 | } | |
2109 | ||
779a65a4 ES |
2110 | static void btrfs_init_balance(struct btrfs_fs_info *fs_info) |
2111 | { | |
2112 | spin_lock_init(&fs_info->balance_lock); | |
2113 | mutex_init(&fs_info->balance_mutex); | |
2114 | atomic_set(&fs_info->balance_running, 0); | |
2115 | atomic_set(&fs_info->balance_pause_req, 0); | |
2116 | atomic_set(&fs_info->balance_cancel_req, 0); | |
2117 | fs_info->balance_ctl = NULL; | |
2118 | init_waitqueue_head(&fs_info->balance_wait_q); | |
2119 | } | |
2120 | ||
6bccf3ab | 2121 | static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) |
f37938e0 | 2122 | { |
2ff7e61e JM |
2123 | struct inode *inode = fs_info->btree_inode; |
2124 | ||
2125 | inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; | |
2126 | set_nlink(inode, 1); | |
f37938e0 ES |
2127 | /* |
2128 | * we set the i_size on the btree inode to the max possible int. | |
2129 | * the real end of the address space is determined by all of | |
2130 | * the devices in the system | |
2131 | */ | |
2ff7e61e JM |
2132 | inode->i_size = OFFSET_MAX; |
2133 | inode->i_mapping->a_ops = &btree_aops; | |
f37938e0 | 2134 | |
2ff7e61e | 2135 | RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); |
c6100a4b | 2136 | extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode); |
2ff7e61e JM |
2137 | BTRFS_I(inode)->io_tree.track_uptodate = 0; |
2138 | extent_map_tree_init(&BTRFS_I(inode)->extent_tree); | |
f37938e0 | 2139 | |
2ff7e61e | 2140 | BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; |
f37938e0 | 2141 | |
2ff7e61e JM |
2142 | BTRFS_I(inode)->root = fs_info->tree_root; |
2143 | memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); | |
2144 | set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); | |
2145 | btrfs_insert_inode_hash(inode); | |
f37938e0 ES |
2146 | } |
2147 | ||
ad618368 ES |
2148 | static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) |
2149 | { | |
2150 | fs_info->dev_replace.lock_owner = 0; | |
2151 | atomic_set(&fs_info->dev_replace.nesting_level, 0); | |
2152 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); | |
73beece9 LB |
2153 | rwlock_init(&fs_info->dev_replace.lock); |
2154 | atomic_set(&fs_info->dev_replace.read_locks, 0); | |
2155 | atomic_set(&fs_info->dev_replace.blocking_readers, 0); | |
ad618368 | 2156 | init_waitqueue_head(&fs_info->replace_wait); |
73beece9 | 2157 | init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); |
ad618368 ES |
2158 | } |
2159 | ||
f9e92e40 ES |
2160 | static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) |
2161 | { | |
2162 | spin_lock_init(&fs_info->qgroup_lock); | |
2163 | mutex_init(&fs_info->qgroup_ioctl_lock); | |
2164 | fs_info->qgroup_tree = RB_ROOT; | |
2165 | fs_info->qgroup_op_tree = RB_ROOT; | |
2166 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); | |
2167 | fs_info->qgroup_seq = 1; | |
f9e92e40 | 2168 | fs_info->qgroup_ulist = NULL; |
d2c609b8 | 2169 | fs_info->qgroup_rescan_running = false; |
f9e92e40 ES |
2170 | mutex_init(&fs_info->qgroup_rescan_lock); |
2171 | } | |
2172 | ||
2a458198 ES |
2173 | static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, |
2174 | struct btrfs_fs_devices *fs_devices) | |
2175 | { | |
f7b885be | 2176 | u32 max_active = fs_info->thread_pool_size; |
6f011058 | 2177 | unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; |
2a458198 ES |
2178 | |
2179 | fs_info->workers = | |
cb001095 JM |
2180 | btrfs_alloc_workqueue(fs_info, "worker", |
2181 | flags | WQ_HIGHPRI, max_active, 16); | |
2a458198 ES |
2182 | |
2183 | fs_info->delalloc_workers = | |
cb001095 JM |
2184 | btrfs_alloc_workqueue(fs_info, "delalloc", |
2185 | flags, max_active, 2); | |
2a458198 ES |
2186 | |
2187 | fs_info->flush_workers = | |
cb001095 JM |
2188 | btrfs_alloc_workqueue(fs_info, "flush_delalloc", |
2189 | flags, max_active, 0); | |
2a458198 ES |
2190 | |
2191 | fs_info->caching_workers = | |
cb001095 | 2192 | btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); |
2a458198 ES |
2193 | |
2194 | /* | |
2195 | * a higher idle thresh on the submit workers makes it much more | |
2196 | * likely that bios will be send down in a sane order to the | |
2197 | * devices | |
2198 | */ | |
2199 | fs_info->submit_workers = | |
cb001095 | 2200 | btrfs_alloc_workqueue(fs_info, "submit", flags, |
2a458198 ES |
2201 | min_t(u64, fs_devices->num_devices, |
2202 | max_active), 64); | |
2203 | ||
2204 | fs_info->fixup_workers = | |
cb001095 | 2205 | btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); |
2a458198 ES |
2206 | |
2207 | /* | |
2208 | * endios are largely parallel and should have a very | |
2209 | * low idle thresh | |
2210 | */ | |
2211 | fs_info->endio_workers = | |
cb001095 | 2212 | btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); |
2a458198 | 2213 | fs_info->endio_meta_workers = |
cb001095 JM |
2214 | btrfs_alloc_workqueue(fs_info, "endio-meta", flags, |
2215 | max_active, 4); | |
2a458198 | 2216 | fs_info->endio_meta_write_workers = |
cb001095 JM |
2217 | btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, |
2218 | max_active, 2); | |
2a458198 | 2219 | fs_info->endio_raid56_workers = |
cb001095 JM |
2220 | btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, |
2221 | max_active, 4); | |
2a458198 | 2222 | fs_info->endio_repair_workers = |
cb001095 | 2223 | btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); |
2a458198 | 2224 | fs_info->rmw_workers = |
cb001095 | 2225 | btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); |
2a458198 | 2226 | fs_info->endio_write_workers = |
cb001095 JM |
2227 | btrfs_alloc_workqueue(fs_info, "endio-write", flags, |
2228 | max_active, 2); | |
2a458198 | 2229 | fs_info->endio_freespace_worker = |
cb001095 JM |
2230 | btrfs_alloc_workqueue(fs_info, "freespace-write", flags, |
2231 | max_active, 0); | |
2a458198 | 2232 | fs_info->delayed_workers = |
cb001095 JM |
2233 | btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, |
2234 | max_active, 0); | |
2a458198 | 2235 | fs_info->readahead_workers = |
cb001095 JM |
2236 | btrfs_alloc_workqueue(fs_info, "readahead", flags, |
2237 | max_active, 2); | |
2a458198 | 2238 | fs_info->qgroup_rescan_workers = |
cb001095 | 2239 | btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); |
2a458198 | 2240 | fs_info->extent_workers = |
cb001095 | 2241 | btrfs_alloc_workqueue(fs_info, "extent-refs", flags, |
2a458198 ES |
2242 | min_t(u64, fs_devices->num_devices, |
2243 | max_active), 8); | |
2244 | ||
2245 | if (!(fs_info->workers && fs_info->delalloc_workers && | |
2246 | fs_info->submit_workers && fs_info->flush_workers && | |
2247 | fs_info->endio_workers && fs_info->endio_meta_workers && | |
2248 | fs_info->endio_meta_write_workers && | |
2249 | fs_info->endio_repair_workers && | |
2250 | fs_info->endio_write_workers && fs_info->endio_raid56_workers && | |
2251 | fs_info->endio_freespace_worker && fs_info->rmw_workers && | |
2252 | fs_info->caching_workers && fs_info->readahead_workers && | |
2253 | fs_info->fixup_workers && fs_info->delayed_workers && | |
2254 | fs_info->extent_workers && | |
2255 | fs_info->qgroup_rescan_workers)) { | |
2256 | return -ENOMEM; | |
2257 | } | |
2258 | ||
2259 | return 0; | |
2260 | } | |
2261 | ||
63443bf5 ES |
2262 | static int btrfs_replay_log(struct btrfs_fs_info *fs_info, |
2263 | struct btrfs_fs_devices *fs_devices) | |
2264 | { | |
2265 | int ret; | |
63443bf5 ES |
2266 | struct btrfs_root *log_tree_root; |
2267 | struct btrfs_super_block *disk_super = fs_info->super_copy; | |
2268 | u64 bytenr = btrfs_super_log_root(disk_super); | |
2269 | ||
2270 | if (fs_devices->rw_devices == 0) { | |
f14d104d | 2271 | btrfs_warn(fs_info, "log replay required on RO media"); |
63443bf5 ES |
2272 | return -EIO; |
2273 | } | |
2274 | ||
74e4d827 | 2275 | log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
63443bf5 ES |
2276 | if (!log_tree_root) |
2277 | return -ENOMEM; | |
2278 | ||
da17066c | 2279 | __setup_root(log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
63443bf5 | 2280 | |
2ff7e61e JM |
2281 | log_tree_root->node = read_tree_block(fs_info, bytenr, |
2282 | fs_info->generation + 1); | |
64c043de | 2283 | if (IS_ERR(log_tree_root->node)) { |
f14d104d | 2284 | btrfs_warn(fs_info, "failed to read log tree"); |
0eeff236 | 2285 | ret = PTR_ERR(log_tree_root->node); |
64c043de | 2286 | kfree(log_tree_root); |
0eeff236 | 2287 | return ret; |
64c043de | 2288 | } else if (!extent_buffer_uptodate(log_tree_root->node)) { |
f14d104d | 2289 | btrfs_err(fs_info, "failed to read log tree"); |
63443bf5 ES |
2290 | free_extent_buffer(log_tree_root->node); |
2291 | kfree(log_tree_root); | |
2292 | return -EIO; | |
2293 | } | |
2294 | /* returns with log_tree_root freed on success */ | |
2295 | ret = btrfs_recover_log_trees(log_tree_root); | |
2296 | if (ret) { | |
0b246afa JM |
2297 | btrfs_handle_fs_error(fs_info, ret, |
2298 | "Failed to recover log tree"); | |
63443bf5 ES |
2299 | free_extent_buffer(log_tree_root->node); |
2300 | kfree(log_tree_root); | |
2301 | return ret; | |
2302 | } | |
2303 | ||
bc98a42c | 2304 | if (sb_rdonly(fs_info->sb)) { |
6bccf3ab | 2305 | ret = btrfs_commit_super(fs_info); |
63443bf5 ES |
2306 | if (ret) |
2307 | return ret; | |
2308 | } | |
2309 | ||
2310 | return 0; | |
2311 | } | |
2312 | ||
6bccf3ab | 2313 | static int btrfs_read_roots(struct btrfs_fs_info *fs_info) |
4bbcaa64 | 2314 | { |
6bccf3ab | 2315 | struct btrfs_root *tree_root = fs_info->tree_root; |
a4f3d2c4 | 2316 | struct btrfs_root *root; |
4bbcaa64 ES |
2317 | struct btrfs_key location; |
2318 | int ret; | |
2319 | ||
6bccf3ab JM |
2320 | BUG_ON(!fs_info->tree_root); |
2321 | ||
4bbcaa64 ES |
2322 | location.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
2323 | location.type = BTRFS_ROOT_ITEM_KEY; | |
2324 | location.offset = 0; | |
2325 | ||
a4f3d2c4 DS |
2326 | root = btrfs_read_tree_root(tree_root, &location); |
2327 | if (IS_ERR(root)) | |
2328 | return PTR_ERR(root); | |
2329 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2330 | fs_info->extent_root = root; | |
4bbcaa64 ES |
2331 | |
2332 | location.objectid = BTRFS_DEV_TREE_OBJECTID; | |
a4f3d2c4 DS |
2333 | root = btrfs_read_tree_root(tree_root, &location); |
2334 | if (IS_ERR(root)) | |
2335 | return PTR_ERR(root); | |
2336 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2337 | fs_info->dev_root = root; | |
4bbcaa64 ES |
2338 | btrfs_init_devices_late(fs_info); |
2339 | ||
2340 | location.objectid = BTRFS_CSUM_TREE_OBJECTID; | |
a4f3d2c4 DS |
2341 | root = btrfs_read_tree_root(tree_root, &location); |
2342 | if (IS_ERR(root)) | |
2343 | return PTR_ERR(root); | |
2344 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2345 | fs_info->csum_root = root; | |
4bbcaa64 ES |
2346 | |
2347 | location.objectid = BTRFS_QUOTA_TREE_OBJECTID; | |
a4f3d2c4 DS |
2348 | root = btrfs_read_tree_root(tree_root, &location); |
2349 | if (!IS_ERR(root)) { | |
2350 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
afcdd129 | 2351 | set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
a4f3d2c4 | 2352 | fs_info->quota_root = root; |
4bbcaa64 ES |
2353 | } |
2354 | ||
2355 | location.objectid = BTRFS_UUID_TREE_OBJECTID; | |
a4f3d2c4 DS |
2356 | root = btrfs_read_tree_root(tree_root, &location); |
2357 | if (IS_ERR(root)) { | |
2358 | ret = PTR_ERR(root); | |
4bbcaa64 ES |
2359 | if (ret != -ENOENT) |
2360 | return ret; | |
2361 | } else { | |
a4f3d2c4 DS |
2362 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
2363 | fs_info->uuid_root = root; | |
4bbcaa64 ES |
2364 | } |
2365 | ||
70f6d82e OS |
2366 | if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
2367 | location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; | |
2368 | root = btrfs_read_tree_root(tree_root, &location); | |
2369 | if (IS_ERR(root)) | |
2370 | return PTR_ERR(root); | |
2371 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2372 | fs_info->free_space_root = root; | |
2373 | } | |
2374 | ||
4bbcaa64 ES |
2375 | return 0; |
2376 | } | |
2377 | ||
ad2b2c80 AV |
2378 | int open_ctree(struct super_block *sb, |
2379 | struct btrfs_fs_devices *fs_devices, | |
2380 | char *options) | |
2e635a27 | 2381 | { |
db94535d CM |
2382 | u32 sectorsize; |
2383 | u32 nodesize; | |
87ee04eb | 2384 | u32 stripesize; |
84234f3a | 2385 | u64 generation; |
f2b636e8 | 2386 | u64 features; |
3de4586c | 2387 | struct btrfs_key location; |
a061fc8d | 2388 | struct buffer_head *bh; |
4d34b278 | 2389 | struct btrfs_super_block *disk_super; |
815745cf | 2390 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
f84a8bd6 | 2391 | struct btrfs_root *tree_root; |
4d34b278 | 2392 | struct btrfs_root *chunk_root; |
eb60ceac | 2393 | int ret; |
e58ca020 | 2394 | int err = -EINVAL; |
af31f5e5 CM |
2395 | int num_backups_tried = 0; |
2396 | int backup_index = 0; | |
f7b885be | 2397 | u32 max_active; |
6675df31 | 2398 | int clear_free_space_tree = 0; |
4543df7e | 2399 | |
74e4d827 DS |
2400 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
2401 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); | |
cb517eab | 2402 | if (!tree_root || !chunk_root) { |
39279cc3 CM |
2403 | err = -ENOMEM; |
2404 | goto fail; | |
2405 | } | |
76dda93c YZ |
2406 | |
2407 | ret = init_srcu_struct(&fs_info->subvol_srcu); | |
2408 | if (ret) { | |
2409 | err = ret; | |
2410 | goto fail; | |
2411 | } | |
2412 | ||
908c7f19 | 2413 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); |
e2d84521 MX |
2414 | if (ret) { |
2415 | err = ret; | |
9e11ceee | 2416 | goto fail_srcu; |
e2d84521 | 2417 | } |
09cbfeaf | 2418 | fs_info->dirty_metadata_batch = PAGE_SIZE * |
e2d84521 MX |
2419 | (1 + ilog2(nr_cpu_ids)); |
2420 | ||
908c7f19 | 2421 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); |
963d678b MX |
2422 | if (ret) { |
2423 | err = ret; | |
2424 | goto fail_dirty_metadata_bytes; | |
2425 | } | |
2426 | ||
908c7f19 | 2427 | ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); |
c404e0dc MX |
2428 | if (ret) { |
2429 | err = ret; | |
2430 | goto fail_delalloc_bytes; | |
2431 | } | |
2432 | ||
76dda93c | 2433 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
f28491e0 | 2434 | INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); |
8fd17795 | 2435 | INIT_LIST_HEAD(&fs_info->trans_list); |
facda1e7 | 2436 | INIT_LIST_HEAD(&fs_info->dead_roots); |
24bbcf04 | 2437 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
eb73c1b7 | 2438 | INIT_LIST_HEAD(&fs_info->delalloc_roots); |
11833d66 | 2439 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
eb73c1b7 | 2440 | spin_lock_init(&fs_info->delalloc_root_lock); |
a4abeea4 | 2441 | spin_lock_init(&fs_info->trans_lock); |
76dda93c | 2442 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
24bbcf04 | 2443 | spin_lock_init(&fs_info->delayed_iput_lock); |
4cb5300b | 2444 | spin_lock_init(&fs_info->defrag_inodes_lock); |
f29021b2 | 2445 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
ceda0864 | 2446 | spin_lock_init(&fs_info->super_lock); |
fcebe456 | 2447 | spin_lock_init(&fs_info->qgroup_op_lock); |
f28491e0 | 2448 | spin_lock_init(&fs_info->buffer_lock); |
47ab2a6c | 2449 | spin_lock_init(&fs_info->unused_bgs_lock); |
f29021b2 | 2450 | rwlock_init(&fs_info->tree_mod_log_lock); |
d7c15171 | 2451 | mutex_init(&fs_info->unused_bg_unpin_mutex); |
67c5e7d4 | 2452 | mutex_init(&fs_info->delete_unused_bgs_mutex); |
7585717f | 2453 | mutex_init(&fs_info->reloc_mutex); |
573bfb72 | 2454 | mutex_init(&fs_info->delalloc_root_mutex); |
c2d6cb16 | 2455 | mutex_init(&fs_info->cleaner_delayed_iput_mutex); |
de98ced9 | 2456 | seqlock_init(&fs_info->profiles_lock); |
19c00ddc | 2457 | |
0b86a832 | 2458 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
6324fbf3 | 2459 | INIT_LIST_HEAD(&fs_info->space_info); |
f29021b2 | 2460 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
47ab2a6c | 2461 | INIT_LIST_HEAD(&fs_info->unused_bgs); |
0b86a832 | 2462 | btrfs_mapping_init(&fs_info->mapping_tree); |
66d8f3dd MX |
2463 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
2464 | BTRFS_BLOCK_RSV_GLOBAL); | |
66d8f3dd MX |
2465 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); |
2466 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); | |
2467 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); | |
2468 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, | |
2469 | BTRFS_BLOCK_RSV_DELOPS); | |
771ed689 | 2470 | atomic_set(&fs_info->async_delalloc_pages, 0); |
4cb5300b | 2471 | atomic_set(&fs_info->defrag_running, 0); |
fcebe456 | 2472 | atomic_set(&fs_info->qgroup_op_seq, 0); |
2fefd558 | 2473 | atomic_set(&fs_info->reada_works_cnt, 0); |
fc36ed7e | 2474 | atomic64_set(&fs_info->tree_mod_seq, 0); |
e20d96d6 | 2475 | fs_info->sb = sb; |
95ac567a | 2476 | fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; |
9ed74f2d | 2477 | fs_info->metadata_ratio = 0; |
4cb5300b | 2478 | fs_info->defrag_inodes = RB_ROOT; |
a5ed45f8 | 2479 | atomic64_set(&fs_info->free_chunk_space, 0); |
f29021b2 | 2480 | fs_info->tree_mod_log = RB_ROOT; |
8b87dc17 | 2481 | fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; |
f8c269d7 | 2482 | fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ |
90519d66 | 2483 | /* readahead state */ |
d0164adc | 2484 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); |
90519d66 | 2485 | spin_lock_init(&fs_info->reada_lock); |
fd708b81 | 2486 | btrfs_init_ref_verify(fs_info); |
c8b97818 | 2487 | |
b34b086c CM |
2488 | fs_info->thread_pool_size = min_t(unsigned long, |
2489 | num_online_cpus() + 2, 8); | |
0afbaf8c | 2490 | |
199c2a9c MX |
2491 | INIT_LIST_HEAD(&fs_info->ordered_roots); |
2492 | spin_lock_init(&fs_info->ordered_root_lock); | |
69fe2d75 JB |
2493 | |
2494 | fs_info->btree_inode = new_inode(sb); | |
2495 | if (!fs_info->btree_inode) { | |
2496 | err = -ENOMEM; | |
2497 | goto fail_bio_counter; | |
2498 | } | |
2499 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); | |
2500 | ||
16cdcec7 | 2501 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
74e4d827 | 2502 | GFP_KERNEL); |
16cdcec7 MX |
2503 | if (!fs_info->delayed_root) { |
2504 | err = -ENOMEM; | |
2505 | goto fail_iput; | |
2506 | } | |
2507 | btrfs_init_delayed_root(fs_info->delayed_root); | |
3eaa2885 | 2508 | |
638aa7ed | 2509 | btrfs_init_scrub(fs_info); |
21adbd5c SB |
2510 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2511 | fs_info->check_integrity_print_mask = 0; | |
2512 | #endif | |
779a65a4 | 2513 | btrfs_init_balance(fs_info); |
21c7e756 | 2514 | btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); |
a2de733c | 2515 | |
9f6d2510 DS |
2516 | sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE; |
2517 | sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE); | |
a061fc8d | 2518 | |
6bccf3ab | 2519 | btrfs_init_btree_inode(fs_info); |
76dda93c | 2520 | |
0f9dd46c | 2521 | spin_lock_init(&fs_info->block_group_cache_lock); |
6bef4d31 | 2522 | fs_info->block_group_cache_tree = RB_ROOT; |
a1897fdd | 2523 | fs_info->first_logical_byte = (u64)-1; |
0f9dd46c | 2524 | |
c6100a4b JB |
2525 | extent_io_tree_init(&fs_info->freed_extents[0], NULL); |
2526 | extent_io_tree_init(&fs_info->freed_extents[1], NULL); | |
11833d66 | 2527 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
afcdd129 | 2528 | set_bit(BTRFS_FS_BARRIER, &fs_info->flags); |
39279cc3 | 2529 | |
5a3f23d5 | 2530 | mutex_init(&fs_info->ordered_operations_mutex); |
e02119d5 | 2531 | mutex_init(&fs_info->tree_log_mutex); |
925baedd | 2532 | mutex_init(&fs_info->chunk_mutex); |
a74a4b97 CM |
2533 | mutex_init(&fs_info->transaction_kthread_mutex); |
2534 | mutex_init(&fs_info->cleaner_mutex); | |
7d9eb12c | 2535 | mutex_init(&fs_info->volume_mutex); |
1bbc621e | 2536 | mutex_init(&fs_info->ro_block_group_mutex); |
9e351cc8 | 2537 | init_rwsem(&fs_info->commit_root_sem); |
c71bf099 | 2538 | init_rwsem(&fs_info->cleanup_work_sem); |
76dda93c | 2539 | init_rwsem(&fs_info->subvol_sem); |
803b2f54 | 2540 | sema_init(&fs_info->uuid_tree_rescan_sem, 1); |
fa9c0d79 | 2541 | |
ad618368 | 2542 | btrfs_init_dev_replace_locks(fs_info); |
f9e92e40 | 2543 | btrfs_init_qgroup(fs_info); |
416ac51d | 2544 | |
fa9c0d79 CM |
2545 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
2546 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); | |
2547 | ||
e6dcd2dc | 2548 | init_waitqueue_head(&fs_info->transaction_throttle); |
f9295749 | 2549 | init_waitqueue_head(&fs_info->transaction_wait); |
bb9c12c9 | 2550 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
4854ddd0 | 2551 | init_waitqueue_head(&fs_info->async_submit_wait); |
3768f368 | 2552 | |
04216820 FM |
2553 | INIT_LIST_HEAD(&fs_info->pinned_chunks); |
2554 | ||
da17066c JM |
2555 | /* Usable values until the real ones are cached from the superblock */ |
2556 | fs_info->nodesize = 4096; | |
2557 | fs_info->sectorsize = 4096; | |
2558 | fs_info->stripesize = 4096; | |
2559 | ||
53b381b3 DW |
2560 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
2561 | if (ret) { | |
83c8266a | 2562 | err = ret; |
53b381b3 DW |
2563 | goto fail_alloc; |
2564 | } | |
2565 | ||
da17066c | 2566 | __setup_root(tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); |
7eccb903 | 2567 | |
3c4bb26b | 2568 | invalidate_bdev(fs_devices->latest_bdev); |
1104a885 DS |
2569 | |
2570 | /* | |
2571 | * Read super block and check the signature bytes only | |
2572 | */ | |
a512bbf8 | 2573 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
92fc03fb AJ |
2574 | if (IS_ERR(bh)) { |
2575 | err = PTR_ERR(bh); | |
16cdcec7 | 2576 | goto fail_alloc; |
20b45077 | 2577 | } |
39279cc3 | 2578 | |
1104a885 DS |
2579 | /* |
2580 | * We want to check superblock checksum, the type is stored inside. | |
2581 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). | |
2582 | */ | |
ab8d0fc4 | 2583 | if (btrfs_check_super_csum(fs_info, bh->b_data)) { |
05135f59 | 2584 | btrfs_err(fs_info, "superblock checksum mismatch"); |
1104a885 | 2585 | err = -EINVAL; |
b2acdddf | 2586 | brelse(bh); |
1104a885 DS |
2587 | goto fail_alloc; |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * super_copy is zeroed at allocation time and we never touch the | |
2592 | * following bytes up to INFO_SIZE, the checksum is calculated from | |
2593 | * the whole block of INFO_SIZE | |
2594 | */ | |
6c41761f DS |
2595 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
2596 | memcpy(fs_info->super_for_commit, fs_info->super_copy, | |
2597 | sizeof(*fs_info->super_for_commit)); | |
a061fc8d | 2598 | brelse(bh); |
5f39d397 | 2599 | |
6c41761f | 2600 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
0b86a832 | 2601 | |
3d3a126a | 2602 | ret = btrfs_check_super_valid(fs_info); |
1104a885 | 2603 | if (ret) { |
05135f59 | 2604 | btrfs_err(fs_info, "superblock contains fatal errors"); |
1104a885 DS |
2605 | err = -EINVAL; |
2606 | goto fail_alloc; | |
2607 | } | |
2608 | ||
6c41761f | 2609 | disk_super = fs_info->super_copy; |
0f7d52f4 | 2610 | if (!btrfs_super_root(disk_super)) |
16cdcec7 | 2611 | goto fail_alloc; |
0f7d52f4 | 2612 | |
acce952b | 2613 | /* check FS state, whether FS is broken. */ |
87533c47 MX |
2614 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
2615 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); | |
acce952b | 2616 | |
af31f5e5 CM |
2617 | /* |
2618 | * run through our array of backup supers and setup | |
2619 | * our ring pointer to the oldest one | |
2620 | */ | |
2621 | generation = btrfs_super_generation(disk_super); | |
2622 | find_oldest_super_backup(fs_info, generation); | |
2623 | ||
75e7cb7f LB |
2624 | /* |
2625 | * In the long term, we'll store the compression type in the super | |
2626 | * block, and it'll be used for per file compression control. | |
2627 | */ | |
2628 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; | |
2629 | ||
2ff7e61e | 2630 | ret = btrfs_parse_options(fs_info, options, sb->s_flags); |
2b82032c YZ |
2631 | if (ret) { |
2632 | err = ret; | |
16cdcec7 | 2633 | goto fail_alloc; |
2b82032c | 2634 | } |
dfe25020 | 2635 | |
f2b636e8 JB |
2636 | features = btrfs_super_incompat_flags(disk_super) & |
2637 | ~BTRFS_FEATURE_INCOMPAT_SUPP; | |
2638 | if (features) { | |
05135f59 DS |
2639 | btrfs_err(fs_info, |
2640 | "cannot mount because of unsupported optional features (%llx)", | |
2641 | features); | |
f2b636e8 | 2642 | err = -EINVAL; |
16cdcec7 | 2643 | goto fail_alloc; |
f2b636e8 JB |
2644 | } |
2645 | ||
5d4f98a2 | 2646 | features = btrfs_super_incompat_flags(disk_super); |
a6fa6fae | 2647 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
0b246afa | 2648 | if (fs_info->compress_type == BTRFS_COMPRESS_LZO) |
a6fa6fae | 2649 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
5c1aab1d NT |
2650 | else if (fs_info->compress_type == BTRFS_COMPRESS_ZSTD) |
2651 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD; | |
727011e0 | 2652 | |
3173a18f | 2653 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
05135f59 | 2654 | btrfs_info(fs_info, "has skinny extents"); |
3173a18f | 2655 | |
727011e0 CM |
2656 | /* |
2657 | * flag our filesystem as having big metadata blocks if | |
2658 | * they are bigger than the page size | |
2659 | */ | |
09cbfeaf | 2660 | if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { |
727011e0 | 2661 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
05135f59 DS |
2662 | btrfs_info(fs_info, |
2663 | "flagging fs with big metadata feature"); | |
727011e0 CM |
2664 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
2665 | } | |
2666 | ||
bc3f116f | 2667 | nodesize = btrfs_super_nodesize(disk_super); |
bc3f116f | 2668 | sectorsize = btrfs_super_sectorsize(disk_super); |
b7f67055 | 2669 | stripesize = sectorsize; |
707e8a07 | 2670 | fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); |
963d678b | 2671 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
bc3f116f | 2672 | |
da17066c JM |
2673 | /* Cache block sizes */ |
2674 | fs_info->nodesize = nodesize; | |
2675 | fs_info->sectorsize = sectorsize; | |
2676 | fs_info->stripesize = stripesize; | |
2677 | ||
bc3f116f CM |
2678 | /* |
2679 | * mixed block groups end up with duplicate but slightly offset | |
2680 | * extent buffers for the same range. It leads to corruptions | |
2681 | */ | |
2682 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && | |
707e8a07 | 2683 | (sectorsize != nodesize)) { |
05135f59 DS |
2684 | btrfs_err(fs_info, |
2685 | "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", | |
2686 | nodesize, sectorsize); | |
bc3f116f CM |
2687 | goto fail_alloc; |
2688 | } | |
2689 | ||
ceda0864 MX |
2690 | /* |
2691 | * Needn't use the lock because there is no other task which will | |
2692 | * update the flag. | |
2693 | */ | |
a6fa6fae | 2694 | btrfs_set_super_incompat_flags(disk_super, features); |
5d4f98a2 | 2695 | |
f2b636e8 JB |
2696 | features = btrfs_super_compat_ro_flags(disk_super) & |
2697 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; | |
bc98a42c | 2698 | if (!sb_rdonly(sb) && features) { |
05135f59 DS |
2699 | btrfs_err(fs_info, |
2700 | "cannot mount read-write because of unsupported optional features (%llx)", | |
c1c9ff7c | 2701 | features); |
f2b636e8 | 2702 | err = -EINVAL; |
16cdcec7 | 2703 | goto fail_alloc; |
f2b636e8 | 2704 | } |
61d92c32 | 2705 | |
5cdc7ad3 | 2706 | max_active = fs_info->thread_pool_size; |
61d92c32 | 2707 | |
2a458198 ES |
2708 | ret = btrfs_init_workqueues(fs_info, fs_devices); |
2709 | if (ret) { | |
2710 | err = ret; | |
0dc3b84a JB |
2711 | goto fail_sb_buffer; |
2712 | } | |
4543df7e | 2713 | |
9e11ceee JK |
2714 | sb->s_bdi->congested_fn = btrfs_congested_fn; |
2715 | sb->s_bdi->congested_data = fs_info; | |
2716 | sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; | |
d4417e22 | 2717 | sb->s_bdi->ra_pages = VM_MAX_READAHEAD * SZ_1K / PAGE_SIZE; |
9e11ceee JK |
2718 | sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); |
2719 | sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); | |
4575c9cc | 2720 | |
a061fc8d CM |
2721 | sb->s_blocksize = sectorsize; |
2722 | sb->s_blocksize_bits = blksize_bits(sectorsize); | |
ee87cf5e | 2723 | memcpy(&sb->s_uuid, fs_info->fsid, BTRFS_FSID_SIZE); |
db94535d | 2724 | |
925baedd | 2725 | mutex_lock(&fs_info->chunk_mutex); |
6bccf3ab | 2726 | ret = btrfs_read_sys_array(fs_info); |
925baedd | 2727 | mutex_unlock(&fs_info->chunk_mutex); |
84eed90f | 2728 | if (ret) { |
05135f59 | 2729 | btrfs_err(fs_info, "failed to read the system array: %d", ret); |
5d4f98a2 | 2730 | goto fail_sb_buffer; |
84eed90f | 2731 | } |
0b86a832 | 2732 | |
84234f3a | 2733 | generation = btrfs_super_chunk_root_generation(disk_super); |
0b86a832 | 2734 | |
da17066c | 2735 | __setup_root(chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
0b86a832 | 2736 | |
2ff7e61e | 2737 | chunk_root->node = read_tree_block(fs_info, |
0b86a832 | 2738 | btrfs_super_chunk_root(disk_super), |
ce86cd59 | 2739 | generation); |
64c043de LB |
2740 | if (IS_ERR(chunk_root->node) || |
2741 | !extent_buffer_uptodate(chunk_root->node)) { | |
05135f59 | 2742 | btrfs_err(fs_info, "failed to read chunk root"); |
e5fffbac | 2743 | if (!IS_ERR(chunk_root->node)) |
2744 | free_extent_buffer(chunk_root->node); | |
95ab1f64 | 2745 | chunk_root->node = NULL; |
af31f5e5 | 2746 | goto fail_tree_roots; |
83121942 | 2747 | } |
5d4f98a2 YZ |
2748 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
2749 | chunk_root->commit_root = btrfs_root_node(chunk_root); | |
0b86a832 | 2750 | |
e17cade2 | 2751 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
b308bc2f | 2752 | btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); |
e17cade2 | 2753 | |
5b4aacef | 2754 | ret = btrfs_read_chunk_tree(fs_info); |
2b82032c | 2755 | if (ret) { |
05135f59 | 2756 | btrfs_err(fs_info, "failed to read chunk tree: %d", ret); |
af31f5e5 | 2757 | goto fail_tree_roots; |
2b82032c | 2758 | } |
0b86a832 | 2759 | |
8dabb742 | 2760 | /* |
9b99b115 AJ |
2761 | * Keep the devid that is marked to be the target device for the |
2762 | * device replace procedure | |
8dabb742 | 2763 | */ |
9b99b115 | 2764 | btrfs_free_extra_devids(fs_devices, 0); |
dfe25020 | 2765 | |
a6b0d5c8 | 2766 | if (!fs_devices->latest_bdev) { |
05135f59 | 2767 | btrfs_err(fs_info, "failed to read devices"); |
a6b0d5c8 CM |
2768 | goto fail_tree_roots; |
2769 | } | |
2770 | ||
af31f5e5 | 2771 | retry_root_backup: |
84234f3a | 2772 | generation = btrfs_super_generation(disk_super); |
0b86a832 | 2773 | |
2ff7e61e | 2774 | tree_root->node = read_tree_block(fs_info, |
db94535d | 2775 | btrfs_super_root(disk_super), |
ce86cd59 | 2776 | generation); |
64c043de LB |
2777 | if (IS_ERR(tree_root->node) || |
2778 | !extent_buffer_uptodate(tree_root->node)) { | |
05135f59 | 2779 | btrfs_warn(fs_info, "failed to read tree root"); |
e5fffbac | 2780 | if (!IS_ERR(tree_root->node)) |
2781 | free_extent_buffer(tree_root->node); | |
95ab1f64 | 2782 | tree_root->node = NULL; |
af31f5e5 | 2783 | goto recovery_tree_root; |
83121942 | 2784 | } |
af31f5e5 | 2785 | |
5d4f98a2 YZ |
2786 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
2787 | tree_root->commit_root = btrfs_root_node(tree_root); | |
69e9c6c6 | 2788 | btrfs_set_root_refs(&tree_root->root_item, 1); |
db94535d | 2789 | |
f32e48e9 CR |
2790 | mutex_lock(&tree_root->objectid_mutex); |
2791 | ret = btrfs_find_highest_objectid(tree_root, | |
2792 | &tree_root->highest_objectid); | |
2793 | if (ret) { | |
2794 | mutex_unlock(&tree_root->objectid_mutex); | |
2795 | goto recovery_tree_root; | |
2796 | } | |
2797 | ||
2798 | ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); | |
2799 | ||
2800 | mutex_unlock(&tree_root->objectid_mutex); | |
2801 | ||
6bccf3ab | 2802 | ret = btrfs_read_roots(fs_info); |
4bbcaa64 | 2803 | if (ret) |
af31f5e5 | 2804 | goto recovery_tree_root; |
f7a81ea4 | 2805 | |
8929ecfa YZ |
2806 | fs_info->generation = generation; |
2807 | fs_info->last_trans_committed = generation; | |
8929ecfa | 2808 | |
68310a5e ID |
2809 | ret = btrfs_recover_balance(fs_info); |
2810 | if (ret) { | |
05135f59 | 2811 | btrfs_err(fs_info, "failed to recover balance: %d", ret); |
68310a5e ID |
2812 | goto fail_block_groups; |
2813 | } | |
2814 | ||
733f4fbb SB |
2815 | ret = btrfs_init_dev_stats(fs_info); |
2816 | if (ret) { | |
05135f59 | 2817 | btrfs_err(fs_info, "failed to init dev_stats: %d", ret); |
733f4fbb SB |
2818 | goto fail_block_groups; |
2819 | } | |
2820 | ||
8dabb742 SB |
2821 | ret = btrfs_init_dev_replace(fs_info); |
2822 | if (ret) { | |
05135f59 | 2823 | btrfs_err(fs_info, "failed to init dev_replace: %d", ret); |
8dabb742 SB |
2824 | goto fail_block_groups; |
2825 | } | |
2826 | ||
9b99b115 | 2827 | btrfs_free_extra_devids(fs_devices, 1); |
8dabb742 | 2828 | |
b7c35e81 AJ |
2829 | ret = btrfs_sysfs_add_fsid(fs_devices, NULL); |
2830 | if (ret) { | |
05135f59 DS |
2831 | btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", |
2832 | ret); | |
b7c35e81 AJ |
2833 | goto fail_block_groups; |
2834 | } | |
2835 | ||
2836 | ret = btrfs_sysfs_add_device(fs_devices); | |
2837 | if (ret) { | |
05135f59 DS |
2838 | btrfs_err(fs_info, "failed to init sysfs device interface: %d", |
2839 | ret); | |
b7c35e81 AJ |
2840 | goto fail_fsdev_sysfs; |
2841 | } | |
2842 | ||
96f3136e | 2843 | ret = btrfs_sysfs_add_mounted(fs_info); |
c59021f8 | 2844 | if (ret) { |
05135f59 | 2845 | btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); |
b7c35e81 | 2846 | goto fail_fsdev_sysfs; |
c59021f8 | 2847 | } |
2848 | ||
c59021f8 | 2849 | ret = btrfs_init_space_info(fs_info); |
2850 | if (ret) { | |
05135f59 | 2851 | btrfs_err(fs_info, "failed to initialize space info: %d", ret); |
2365dd3c | 2852 | goto fail_sysfs; |
c59021f8 | 2853 | } |
2854 | ||
5b4aacef | 2855 | ret = btrfs_read_block_groups(fs_info); |
1b1d1f66 | 2856 | if (ret) { |
05135f59 | 2857 | btrfs_err(fs_info, "failed to read block groups: %d", ret); |
2365dd3c | 2858 | goto fail_sysfs; |
1b1d1f66 | 2859 | } |
4330e183 | 2860 | |
6528b99d | 2861 | if (!sb_rdonly(sb) && !btrfs_check_rw_degradable(fs_info, NULL)) { |
05135f59 | 2862 | btrfs_warn(fs_info, |
4330e183 | 2863 | "writeable mount is not allowed due to too many missing devices"); |
2365dd3c | 2864 | goto fail_sysfs; |
292fd7fc | 2865 | } |
9078a3e1 | 2866 | |
a74a4b97 CM |
2867 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
2868 | "btrfs-cleaner"); | |
57506d50 | 2869 | if (IS_ERR(fs_info->cleaner_kthread)) |
2365dd3c | 2870 | goto fail_sysfs; |
a74a4b97 CM |
2871 | |
2872 | fs_info->transaction_kthread = kthread_run(transaction_kthread, | |
2873 | tree_root, | |
2874 | "btrfs-transaction"); | |
57506d50 | 2875 | if (IS_ERR(fs_info->transaction_kthread)) |
3f157a2f | 2876 | goto fail_cleaner; |
a74a4b97 | 2877 | |
583b7231 | 2878 | if (!btrfs_test_opt(fs_info, NOSSD) && |
c289811c | 2879 | !fs_info->fs_devices->rotating) { |
583b7231 | 2880 | btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); |
c289811c CM |
2881 | } |
2882 | ||
572d9ab7 | 2883 | /* |
01327610 | 2884 | * Mount does not set all options immediately, we can do it now and do |
572d9ab7 DS |
2885 | * not have to wait for transaction commit |
2886 | */ | |
2887 | btrfs_apply_pending_changes(fs_info); | |
3818aea2 | 2888 | |
21adbd5c | 2889 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
0b246afa | 2890 | if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { |
2ff7e61e | 2891 | ret = btrfsic_mount(fs_info, fs_devices, |
0b246afa | 2892 | btrfs_test_opt(fs_info, |
21adbd5c SB |
2893 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
2894 | 1 : 0, | |
2895 | fs_info->check_integrity_print_mask); | |
2896 | if (ret) | |
05135f59 DS |
2897 | btrfs_warn(fs_info, |
2898 | "failed to initialize integrity check module: %d", | |
2899 | ret); | |
21adbd5c SB |
2900 | } |
2901 | #endif | |
bcef60f2 AJ |
2902 | ret = btrfs_read_qgroup_config(fs_info); |
2903 | if (ret) | |
2904 | goto fail_trans_kthread; | |
21adbd5c | 2905 | |
fd708b81 JB |
2906 | if (btrfs_build_ref_tree(fs_info)) |
2907 | btrfs_err(fs_info, "couldn't build ref tree"); | |
2908 | ||
96da0919 QW |
2909 | /* do not make disk changes in broken FS or nologreplay is given */ |
2910 | if (btrfs_super_log_root(disk_super) != 0 && | |
0b246afa | 2911 | !btrfs_test_opt(fs_info, NOLOGREPLAY)) { |
63443bf5 | 2912 | ret = btrfs_replay_log(fs_info, fs_devices); |
79787eaa | 2913 | if (ret) { |
63443bf5 | 2914 | err = ret; |
28c16cbb | 2915 | goto fail_qgroup; |
79787eaa | 2916 | } |
e02119d5 | 2917 | } |
1a40e23b | 2918 | |
6bccf3ab | 2919 | ret = btrfs_find_orphan_roots(fs_info); |
79787eaa | 2920 | if (ret) |
28c16cbb | 2921 | goto fail_qgroup; |
76dda93c | 2922 | |
bc98a42c | 2923 | if (!sb_rdonly(sb)) { |
d68fc57b | 2924 | ret = btrfs_cleanup_fs_roots(fs_info); |
44c44af2 | 2925 | if (ret) |
28c16cbb | 2926 | goto fail_qgroup; |
90c711ab ZB |
2927 | |
2928 | mutex_lock(&fs_info->cleaner_mutex); | |
5d4f98a2 | 2929 | ret = btrfs_recover_relocation(tree_root); |
90c711ab | 2930 | mutex_unlock(&fs_info->cleaner_mutex); |
d7ce5843 | 2931 | if (ret < 0) { |
05135f59 DS |
2932 | btrfs_warn(fs_info, "failed to recover relocation: %d", |
2933 | ret); | |
d7ce5843 | 2934 | err = -EINVAL; |
bcef60f2 | 2935 | goto fail_qgroup; |
d7ce5843 | 2936 | } |
7c2ca468 | 2937 | } |
1a40e23b | 2938 | |
3de4586c CM |
2939 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
2940 | location.type = BTRFS_ROOT_ITEM_KEY; | |
cb517eab | 2941 | location.offset = 0; |
3de4586c | 2942 | |
3de4586c | 2943 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
3140c9a3 DC |
2944 | if (IS_ERR(fs_info->fs_root)) { |
2945 | err = PTR_ERR(fs_info->fs_root); | |
bcef60f2 | 2946 | goto fail_qgroup; |
3140c9a3 | 2947 | } |
c289811c | 2948 | |
bc98a42c | 2949 | if (sb_rdonly(sb)) |
2b6ba629 | 2950 | return 0; |
59641015 | 2951 | |
f8d468a1 OS |
2952 | if (btrfs_test_opt(fs_info, CLEAR_CACHE) && |
2953 | btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { | |
6675df31 OS |
2954 | clear_free_space_tree = 1; |
2955 | } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && | |
2956 | !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { | |
2957 | btrfs_warn(fs_info, "free space tree is invalid"); | |
2958 | clear_free_space_tree = 1; | |
2959 | } | |
2960 | ||
2961 | if (clear_free_space_tree) { | |
f8d468a1 OS |
2962 | btrfs_info(fs_info, "clearing free space tree"); |
2963 | ret = btrfs_clear_free_space_tree(fs_info); | |
2964 | if (ret) { | |
2965 | btrfs_warn(fs_info, | |
2966 | "failed to clear free space tree: %d", ret); | |
6bccf3ab | 2967 | close_ctree(fs_info); |
f8d468a1 OS |
2968 | return ret; |
2969 | } | |
2970 | } | |
2971 | ||
0b246afa | 2972 | if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && |
511711af | 2973 | !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
05135f59 | 2974 | btrfs_info(fs_info, "creating free space tree"); |
511711af CM |
2975 | ret = btrfs_create_free_space_tree(fs_info); |
2976 | if (ret) { | |
05135f59 DS |
2977 | btrfs_warn(fs_info, |
2978 | "failed to create free space tree: %d", ret); | |
6bccf3ab | 2979 | close_ctree(fs_info); |
511711af CM |
2980 | return ret; |
2981 | } | |
2982 | } | |
2983 | ||
2b6ba629 ID |
2984 | down_read(&fs_info->cleanup_work_sem); |
2985 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || | |
2986 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { | |
e3acc2a6 | 2987 | up_read(&fs_info->cleanup_work_sem); |
6bccf3ab | 2988 | close_ctree(fs_info); |
2b6ba629 ID |
2989 | return ret; |
2990 | } | |
2991 | up_read(&fs_info->cleanup_work_sem); | |
59641015 | 2992 | |
2b6ba629 ID |
2993 | ret = btrfs_resume_balance_async(fs_info); |
2994 | if (ret) { | |
05135f59 | 2995 | btrfs_warn(fs_info, "failed to resume balance: %d", ret); |
6bccf3ab | 2996 | close_ctree(fs_info); |
2b6ba629 | 2997 | return ret; |
e3acc2a6 JB |
2998 | } |
2999 | ||
8dabb742 SB |
3000 | ret = btrfs_resume_dev_replace_async(fs_info); |
3001 | if (ret) { | |
05135f59 | 3002 | btrfs_warn(fs_info, "failed to resume device replace: %d", ret); |
6bccf3ab | 3003 | close_ctree(fs_info); |
8dabb742 SB |
3004 | return ret; |
3005 | } | |
3006 | ||
b382a324 JS |
3007 | btrfs_qgroup_rescan_resume(fs_info); |
3008 | ||
4bbcaa64 | 3009 | if (!fs_info->uuid_root) { |
05135f59 | 3010 | btrfs_info(fs_info, "creating UUID tree"); |
f7a81ea4 SB |
3011 | ret = btrfs_create_uuid_tree(fs_info); |
3012 | if (ret) { | |
05135f59 DS |
3013 | btrfs_warn(fs_info, |
3014 | "failed to create the UUID tree: %d", ret); | |
6bccf3ab | 3015 | close_ctree(fs_info); |
f7a81ea4 SB |
3016 | return ret; |
3017 | } | |
0b246afa | 3018 | } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || |
4bbcaa64 ES |
3019 | fs_info->generation != |
3020 | btrfs_super_uuid_tree_generation(disk_super)) { | |
05135f59 | 3021 | btrfs_info(fs_info, "checking UUID tree"); |
70f80175 SB |
3022 | ret = btrfs_check_uuid_tree(fs_info); |
3023 | if (ret) { | |
05135f59 DS |
3024 | btrfs_warn(fs_info, |
3025 | "failed to check the UUID tree: %d", ret); | |
6bccf3ab | 3026 | close_ctree(fs_info); |
70f80175 SB |
3027 | return ret; |
3028 | } | |
3029 | } else { | |
afcdd129 | 3030 | set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); |
f7a81ea4 | 3031 | } |
afcdd129 | 3032 | set_bit(BTRFS_FS_OPEN, &fs_info->flags); |
47ab2a6c | 3033 | |
8dcddfa0 QW |
3034 | /* |
3035 | * backuproot only affect mount behavior, and if open_ctree succeeded, | |
3036 | * no need to keep the flag | |
3037 | */ | |
3038 | btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); | |
3039 | ||
ad2b2c80 | 3040 | return 0; |
39279cc3 | 3041 | |
bcef60f2 AJ |
3042 | fail_qgroup: |
3043 | btrfs_free_qgroup_config(fs_info); | |
7c2ca468 CM |
3044 | fail_trans_kthread: |
3045 | kthread_stop(fs_info->transaction_kthread); | |
2ff7e61e | 3046 | btrfs_cleanup_transaction(fs_info); |
faa2dbf0 | 3047 | btrfs_free_fs_roots(fs_info); |
3f157a2f | 3048 | fail_cleaner: |
a74a4b97 | 3049 | kthread_stop(fs_info->cleaner_kthread); |
7c2ca468 CM |
3050 | |
3051 | /* | |
3052 | * make sure we're done with the btree inode before we stop our | |
3053 | * kthreads | |
3054 | */ | |
3055 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); | |
7c2ca468 | 3056 | |
2365dd3c | 3057 | fail_sysfs: |
6618a59b | 3058 | btrfs_sysfs_remove_mounted(fs_info); |
2365dd3c | 3059 | |
b7c35e81 AJ |
3060 | fail_fsdev_sysfs: |
3061 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); | |
3062 | ||
1b1d1f66 | 3063 | fail_block_groups: |
54067ae9 | 3064 | btrfs_put_block_group_cache(fs_info); |
af31f5e5 CM |
3065 | |
3066 | fail_tree_roots: | |
3067 | free_root_pointers(fs_info, 1); | |
2b8195bb | 3068 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
af31f5e5 | 3069 | |
39279cc3 | 3070 | fail_sb_buffer: |
7abadb64 | 3071 | btrfs_stop_all_workers(fs_info); |
5cdd7db6 | 3072 | btrfs_free_block_groups(fs_info); |
16cdcec7 | 3073 | fail_alloc: |
4543df7e | 3074 | fail_iput: |
586e46e2 ID |
3075 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
3076 | ||
4543df7e | 3077 | iput(fs_info->btree_inode); |
c404e0dc MX |
3078 | fail_bio_counter: |
3079 | percpu_counter_destroy(&fs_info->bio_counter); | |
963d678b MX |
3080 | fail_delalloc_bytes: |
3081 | percpu_counter_destroy(&fs_info->delalloc_bytes); | |
e2d84521 MX |
3082 | fail_dirty_metadata_bytes: |
3083 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); | |
76dda93c YZ |
3084 | fail_srcu: |
3085 | cleanup_srcu_struct(&fs_info->subvol_srcu); | |
7e662854 | 3086 | fail: |
53b381b3 | 3087 | btrfs_free_stripe_hash_table(fs_info); |
586e46e2 | 3088 | btrfs_close_devices(fs_info->fs_devices); |
ad2b2c80 | 3089 | return err; |
af31f5e5 CM |
3090 | |
3091 | recovery_tree_root: | |
0b246afa | 3092 | if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) |
af31f5e5 CM |
3093 | goto fail_tree_roots; |
3094 | ||
3095 | free_root_pointers(fs_info, 0); | |
3096 | ||
3097 | /* don't use the log in recovery mode, it won't be valid */ | |
3098 | btrfs_set_super_log_root(disk_super, 0); | |
3099 | ||
3100 | /* we can't trust the free space cache either */ | |
3101 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); | |
3102 | ||
3103 | ret = next_root_backup(fs_info, fs_info->super_copy, | |
3104 | &num_backups_tried, &backup_index); | |
3105 | if (ret == -1) | |
3106 | goto fail_block_groups; | |
3107 | goto retry_root_backup; | |
eb60ceac | 3108 | } |
663faf9f | 3109 | ALLOW_ERROR_INJECTION(open_ctree, ERRNO); |
eb60ceac | 3110 | |
f2984462 CM |
3111 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
3112 | { | |
f2984462 CM |
3113 | if (uptodate) { |
3114 | set_buffer_uptodate(bh); | |
3115 | } else { | |
442a4f63 SB |
3116 | struct btrfs_device *device = (struct btrfs_device *) |
3117 | bh->b_private; | |
3118 | ||
fb456252 | 3119 | btrfs_warn_rl_in_rcu(device->fs_info, |
b14af3b4 | 3120 | "lost page write due to IO error on %s", |
606686ee | 3121 | rcu_str_deref(device->name)); |
01327610 | 3122 | /* note, we don't set_buffer_write_io_error because we have |
1259ab75 CM |
3123 | * our own ways of dealing with the IO errors |
3124 | */ | |
f2984462 | 3125 | clear_buffer_uptodate(bh); |
442a4f63 | 3126 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
f2984462 CM |
3127 | } |
3128 | unlock_buffer(bh); | |
3129 | put_bh(bh); | |
3130 | } | |
3131 | ||
29c36d72 AJ |
3132 | int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, |
3133 | struct buffer_head **bh_ret) | |
3134 | { | |
3135 | struct buffer_head *bh; | |
3136 | struct btrfs_super_block *super; | |
3137 | u64 bytenr; | |
3138 | ||
3139 | bytenr = btrfs_sb_offset(copy_num); | |
3140 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) | |
3141 | return -EINVAL; | |
3142 | ||
9f6d2510 | 3143 | bh = __bread(bdev, bytenr / BTRFS_BDEV_BLOCKSIZE, BTRFS_SUPER_INFO_SIZE); |
29c36d72 AJ |
3144 | /* |
3145 | * If we fail to read from the underlying devices, as of now | |
3146 | * the best option we have is to mark it EIO. | |
3147 | */ | |
3148 | if (!bh) | |
3149 | return -EIO; | |
3150 | ||
3151 | super = (struct btrfs_super_block *)bh->b_data; | |
3152 | if (btrfs_super_bytenr(super) != bytenr || | |
3153 | btrfs_super_magic(super) != BTRFS_MAGIC) { | |
3154 | brelse(bh); | |
3155 | return -EINVAL; | |
3156 | } | |
3157 | ||
3158 | *bh_ret = bh; | |
3159 | return 0; | |
3160 | } | |
3161 | ||
3162 | ||
a512bbf8 YZ |
3163 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
3164 | { | |
3165 | struct buffer_head *bh; | |
3166 | struct buffer_head *latest = NULL; | |
3167 | struct btrfs_super_block *super; | |
3168 | int i; | |
3169 | u64 transid = 0; | |
92fc03fb | 3170 | int ret = -EINVAL; |
a512bbf8 YZ |
3171 | |
3172 | /* we would like to check all the supers, but that would make | |
3173 | * a btrfs mount succeed after a mkfs from a different FS. | |
3174 | * So, we need to add a special mount option to scan for | |
3175 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead | |
3176 | */ | |
3177 | for (i = 0; i < 1; i++) { | |
29c36d72 AJ |
3178 | ret = btrfs_read_dev_one_super(bdev, i, &bh); |
3179 | if (ret) | |
a512bbf8 YZ |
3180 | continue; |
3181 | ||
3182 | super = (struct btrfs_super_block *)bh->b_data; | |
a512bbf8 YZ |
3183 | |
3184 | if (!latest || btrfs_super_generation(super) > transid) { | |
3185 | brelse(latest); | |
3186 | latest = bh; | |
3187 | transid = btrfs_super_generation(super); | |
3188 | } else { | |
3189 | brelse(bh); | |
3190 | } | |
3191 | } | |
92fc03fb AJ |
3192 | |
3193 | if (!latest) | |
3194 | return ERR_PTR(ret); | |
3195 | ||
a512bbf8 YZ |
3196 | return latest; |
3197 | } | |
3198 | ||
4eedeb75 | 3199 | /* |
abbb3b8e DS |
3200 | * Write superblock @sb to the @device. Do not wait for completion, all the |
3201 | * buffer heads we write are pinned. | |
4eedeb75 | 3202 | * |
abbb3b8e DS |
3203 | * Write @max_mirrors copies of the superblock, where 0 means default that fit |
3204 | * the expected device size at commit time. Note that max_mirrors must be | |
3205 | * same for write and wait phases. | |
4eedeb75 | 3206 | * |
abbb3b8e | 3207 | * Return number of errors when buffer head is not found or submission fails. |
4eedeb75 | 3208 | */ |
a512bbf8 | 3209 | static int write_dev_supers(struct btrfs_device *device, |
abbb3b8e | 3210 | struct btrfs_super_block *sb, int max_mirrors) |
a512bbf8 YZ |
3211 | { |
3212 | struct buffer_head *bh; | |
3213 | int i; | |
3214 | int ret; | |
3215 | int errors = 0; | |
3216 | u32 crc; | |
3217 | u64 bytenr; | |
1b9e619c | 3218 | int op_flags; |
a512bbf8 YZ |
3219 | |
3220 | if (max_mirrors == 0) | |
3221 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; | |
3222 | ||
a512bbf8 YZ |
3223 | for (i = 0; i < max_mirrors; i++) { |
3224 | bytenr = btrfs_sb_offset(i); | |
935e5cc9 MX |
3225 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
3226 | device->commit_total_bytes) | |
a512bbf8 YZ |
3227 | break; |
3228 | ||
abbb3b8e | 3229 | btrfs_set_super_bytenr(sb, bytenr); |
4eedeb75 | 3230 | |
abbb3b8e DS |
3231 | crc = ~(u32)0; |
3232 | crc = btrfs_csum_data((const char *)sb + BTRFS_CSUM_SIZE, crc, | |
3233 | BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); | |
3234 | btrfs_csum_final(crc, sb->csum); | |
4eedeb75 | 3235 | |
abbb3b8e | 3236 | /* One reference for us, and we leave it for the caller */ |
9f6d2510 | 3237 | bh = __getblk(device->bdev, bytenr / BTRFS_BDEV_BLOCKSIZE, |
abbb3b8e DS |
3238 | BTRFS_SUPER_INFO_SIZE); |
3239 | if (!bh) { | |
3240 | btrfs_err(device->fs_info, | |
3241 | "couldn't get super buffer head for bytenr %llu", | |
3242 | bytenr); | |
3243 | errors++; | |
4eedeb75 | 3244 | continue; |
abbb3b8e | 3245 | } |
634554dc | 3246 | |
abbb3b8e | 3247 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
a512bbf8 | 3248 | |
abbb3b8e DS |
3249 | /* one reference for submit_bh */ |
3250 | get_bh(bh); | |
4eedeb75 | 3251 | |
abbb3b8e DS |
3252 | set_buffer_uptodate(bh); |
3253 | lock_buffer(bh); | |
3254 | bh->b_end_io = btrfs_end_buffer_write_sync; | |
3255 | bh->b_private = device; | |
a512bbf8 | 3256 | |
387125fc CM |
3257 | /* |
3258 | * we fua the first super. The others we allow | |
3259 | * to go down lazy. | |
3260 | */ | |
1b9e619c OS |
3261 | op_flags = REQ_SYNC | REQ_META | REQ_PRIO; |
3262 | if (i == 0 && !btrfs_test_opt(device->fs_info, NOBARRIER)) | |
3263 | op_flags |= REQ_FUA; | |
3264 | ret = btrfsic_submit_bh(REQ_OP_WRITE, op_flags, bh); | |
4eedeb75 | 3265 | if (ret) |
a512bbf8 | 3266 | errors++; |
a512bbf8 YZ |
3267 | } |
3268 | return errors < i ? 0 : -1; | |
3269 | } | |
3270 | ||
abbb3b8e DS |
3271 | /* |
3272 | * Wait for write completion of superblocks done by write_dev_supers, | |
3273 | * @max_mirrors same for write and wait phases. | |
3274 | * | |
3275 | * Return number of errors when buffer head is not found or not marked up to | |
3276 | * date. | |
3277 | */ | |
3278 | static int wait_dev_supers(struct btrfs_device *device, int max_mirrors) | |
3279 | { | |
3280 | struct buffer_head *bh; | |
3281 | int i; | |
3282 | int errors = 0; | |
b6a535fa | 3283 | bool primary_failed = false; |
abbb3b8e DS |
3284 | u64 bytenr; |
3285 | ||
3286 | if (max_mirrors == 0) | |
3287 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; | |
3288 | ||
3289 | for (i = 0; i < max_mirrors; i++) { | |
3290 | bytenr = btrfs_sb_offset(i); | |
3291 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= | |
3292 | device->commit_total_bytes) | |
3293 | break; | |
3294 | ||
9f6d2510 DS |
3295 | bh = __find_get_block(device->bdev, |
3296 | bytenr / BTRFS_BDEV_BLOCKSIZE, | |
abbb3b8e DS |
3297 | BTRFS_SUPER_INFO_SIZE); |
3298 | if (!bh) { | |
3299 | errors++; | |
b6a535fa HM |
3300 | if (i == 0) |
3301 | primary_failed = true; | |
abbb3b8e DS |
3302 | continue; |
3303 | } | |
3304 | wait_on_buffer(bh); | |
b6a535fa | 3305 | if (!buffer_uptodate(bh)) { |
abbb3b8e | 3306 | errors++; |
b6a535fa HM |
3307 | if (i == 0) |
3308 | primary_failed = true; | |
3309 | } | |
abbb3b8e DS |
3310 | |
3311 | /* drop our reference */ | |
3312 | brelse(bh); | |
3313 | ||
3314 | /* drop the reference from the writing run */ | |
3315 | brelse(bh); | |
3316 | } | |
3317 | ||
b6a535fa HM |
3318 | /* log error, force error return */ |
3319 | if (primary_failed) { | |
3320 | btrfs_err(device->fs_info, "error writing primary super block to device %llu", | |
3321 | device->devid); | |
3322 | return -1; | |
3323 | } | |
3324 | ||
abbb3b8e DS |
3325 | return errors < i ? 0 : -1; |
3326 | } | |
3327 | ||
387125fc CM |
3328 | /* |
3329 | * endio for the write_dev_flush, this will wake anyone waiting | |
3330 | * for the barrier when it is done | |
3331 | */ | |
4246a0b6 | 3332 | static void btrfs_end_empty_barrier(struct bio *bio) |
387125fc | 3333 | { |
e0ae9994 | 3334 | complete(bio->bi_private); |
387125fc CM |
3335 | } |
3336 | ||
3337 | /* | |
4fc6441a AJ |
3338 | * Submit a flush request to the device if it supports it. Error handling is |
3339 | * done in the waiting counterpart. | |
387125fc | 3340 | */ |
4fc6441a | 3341 | static void write_dev_flush(struct btrfs_device *device) |
387125fc | 3342 | { |
c2a9c7ab | 3343 | struct request_queue *q = bdev_get_queue(device->bdev); |
e0ae9994 | 3344 | struct bio *bio = device->flush_bio; |
387125fc | 3345 | |
c2a9c7ab | 3346 | if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) |
4fc6441a | 3347 | return; |
387125fc | 3348 | |
e0ae9994 | 3349 | bio_reset(bio); |
387125fc | 3350 | bio->bi_end_io = btrfs_end_empty_barrier; |
74d46992 | 3351 | bio_set_dev(bio, device->bdev); |
8d910125 | 3352 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; |
387125fc CM |
3353 | init_completion(&device->flush_wait); |
3354 | bio->bi_private = &device->flush_wait; | |
387125fc | 3355 | |
43a01111 | 3356 | btrfsic_submit_bio(bio); |
1c3063b6 | 3357 | set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); |
4fc6441a | 3358 | } |
387125fc | 3359 | |
4fc6441a AJ |
3360 | /* |
3361 | * If the flush bio has been submitted by write_dev_flush, wait for it. | |
3362 | */ | |
8c27cb35 | 3363 | static blk_status_t wait_dev_flush(struct btrfs_device *device) |
4fc6441a | 3364 | { |
4fc6441a | 3365 | struct bio *bio = device->flush_bio; |
387125fc | 3366 | |
1c3063b6 | 3367 | if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state)) |
58efbc9f | 3368 | return BLK_STS_OK; |
387125fc | 3369 | |
1c3063b6 | 3370 | clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state); |
2980d574 | 3371 | wait_for_completion_io(&device->flush_wait); |
387125fc | 3372 | |
8c27cb35 | 3373 | return bio->bi_status; |
387125fc | 3374 | } |
387125fc | 3375 | |
d10b82fe | 3376 | static int check_barrier_error(struct btrfs_fs_info *fs_info) |
401b41e5 | 3377 | { |
6528b99d | 3378 | if (!btrfs_check_rw_degradable(fs_info, NULL)) |
401b41e5 | 3379 | return -EIO; |
387125fc CM |
3380 | return 0; |
3381 | } | |
3382 | ||
3383 | /* | |
3384 | * send an empty flush down to each device in parallel, | |
3385 | * then wait for them | |
3386 | */ | |
3387 | static int barrier_all_devices(struct btrfs_fs_info *info) | |
3388 | { | |
3389 | struct list_head *head; | |
3390 | struct btrfs_device *dev; | |
5af3e8cc | 3391 | int errors_wait = 0; |
4e4cbee9 | 3392 | blk_status_t ret; |
387125fc | 3393 | |
1538e6c5 | 3394 | lockdep_assert_held(&info->fs_devices->device_list_mutex); |
387125fc CM |
3395 | /* send down all the barriers */ |
3396 | head = &info->fs_devices->devices; | |
1538e6c5 | 3397 | list_for_each_entry(dev, head, dev_list) { |
e6e674bd | 3398 | if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) |
f88ba6a2 | 3399 | continue; |
cea7c8bf | 3400 | if (!dev->bdev) |
387125fc | 3401 | continue; |
e12c9621 | 3402 | if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || |
ebbede42 | 3403 | !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) |
387125fc CM |
3404 | continue; |
3405 | ||
4fc6441a | 3406 | write_dev_flush(dev); |
58efbc9f | 3407 | dev->last_flush_error = BLK_STS_OK; |
387125fc CM |
3408 | } |
3409 | ||
3410 | /* wait for all the barriers */ | |
1538e6c5 | 3411 | list_for_each_entry(dev, head, dev_list) { |
e6e674bd | 3412 | if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) |
f88ba6a2 | 3413 | continue; |
387125fc | 3414 | if (!dev->bdev) { |
5af3e8cc | 3415 | errors_wait++; |
387125fc CM |
3416 | continue; |
3417 | } | |
e12c9621 | 3418 | if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || |
ebbede42 | 3419 | !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) |
387125fc CM |
3420 | continue; |
3421 | ||
4fc6441a | 3422 | ret = wait_dev_flush(dev); |
401b41e5 AJ |
3423 | if (ret) { |
3424 | dev->last_flush_error = ret; | |
66b4993e DS |
3425 | btrfs_dev_stat_inc_and_print(dev, |
3426 | BTRFS_DEV_STAT_FLUSH_ERRS); | |
5af3e8cc | 3427 | errors_wait++; |
401b41e5 AJ |
3428 | } |
3429 | } | |
3430 | ||
cea7c8bf | 3431 | if (errors_wait) { |
401b41e5 AJ |
3432 | /* |
3433 | * At some point we need the status of all disks | |
3434 | * to arrive at the volume status. So error checking | |
3435 | * is being pushed to a separate loop. | |
3436 | */ | |
d10b82fe | 3437 | return check_barrier_error(info); |
387125fc | 3438 | } |
387125fc CM |
3439 | return 0; |
3440 | } | |
3441 | ||
943c6e99 ZL |
3442 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) |
3443 | { | |
8789f4fe ZL |
3444 | int raid_type; |
3445 | int min_tolerated = INT_MAX; | |
943c6e99 | 3446 | |
8789f4fe ZL |
3447 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || |
3448 | (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) | |
3449 | min_tolerated = min(min_tolerated, | |
3450 | btrfs_raid_array[BTRFS_RAID_SINGLE]. | |
3451 | tolerated_failures); | |
943c6e99 | 3452 | |
8789f4fe ZL |
3453 | for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { |
3454 | if (raid_type == BTRFS_RAID_SINGLE) | |
3455 | continue; | |
3456 | if (!(flags & btrfs_raid_group[raid_type])) | |
3457 | continue; | |
3458 | min_tolerated = min(min_tolerated, | |
3459 | btrfs_raid_array[raid_type]. | |
3460 | tolerated_failures); | |
3461 | } | |
943c6e99 | 3462 | |
8789f4fe | 3463 | if (min_tolerated == INT_MAX) { |
ab8d0fc4 | 3464 | pr_warn("BTRFS: unknown raid flag: %llu", flags); |
8789f4fe ZL |
3465 | min_tolerated = 0; |
3466 | } | |
3467 | ||
3468 | return min_tolerated; | |
943c6e99 ZL |
3469 | } |
3470 | ||
eece6a9c | 3471 | int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) |
f2984462 | 3472 | { |
e5e9a520 | 3473 | struct list_head *head; |
f2984462 | 3474 | struct btrfs_device *dev; |
a061fc8d | 3475 | struct btrfs_super_block *sb; |
f2984462 | 3476 | struct btrfs_dev_item *dev_item; |
f2984462 CM |
3477 | int ret; |
3478 | int do_barriers; | |
a236aed1 CM |
3479 | int max_errors; |
3480 | int total_errors = 0; | |
a061fc8d | 3481 | u64 flags; |
f2984462 | 3482 | |
0b246afa | 3483 | do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); |
fed3b381 LB |
3484 | |
3485 | /* | |
3486 | * max_mirrors == 0 indicates we're from commit_transaction, | |
3487 | * not from fsync where the tree roots in fs_info have not | |
3488 | * been consistent on disk. | |
3489 | */ | |
3490 | if (max_mirrors == 0) | |
3491 | backup_super_roots(fs_info); | |
f2984462 | 3492 | |
0b246afa | 3493 | sb = fs_info->super_for_commit; |
a061fc8d | 3494 | dev_item = &sb->dev_item; |
e5e9a520 | 3495 | |
0b246afa JM |
3496 | mutex_lock(&fs_info->fs_devices->device_list_mutex); |
3497 | head = &fs_info->fs_devices->devices; | |
3498 | max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; | |
387125fc | 3499 | |
5af3e8cc | 3500 | if (do_barriers) { |
0b246afa | 3501 | ret = barrier_all_devices(fs_info); |
5af3e8cc SB |
3502 | if (ret) { |
3503 | mutex_unlock( | |
0b246afa JM |
3504 | &fs_info->fs_devices->device_list_mutex); |
3505 | btrfs_handle_fs_error(fs_info, ret, | |
3506 | "errors while submitting device barriers."); | |
5af3e8cc SB |
3507 | return ret; |
3508 | } | |
3509 | } | |
387125fc | 3510 | |
1538e6c5 | 3511 | list_for_each_entry(dev, head, dev_list) { |
dfe25020 CM |
3512 | if (!dev->bdev) { |
3513 | total_errors++; | |
3514 | continue; | |
3515 | } | |
e12c9621 | 3516 | if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || |
ebbede42 | 3517 | !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) |
dfe25020 CM |
3518 | continue; |
3519 | ||
2b82032c | 3520 | btrfs_set_stack_device_generation(dev_item, 0); |
a061fc8d CM |
3521 | btrfs_set_stack_device_type(dev_item, dev->type); |
3522 | btrfs_set_stack_device_id(dev_item, dev->devid); | |
7df69d3e | 3523 | btrfs_set_stack_device_total_bytes(dev_item, |
935e5cc9 | 3524 | dev->commit_total_bytes); |
ce7213c7 MX |
3525 | btrfs_set_stack_device_bytes_used(dev_item, |
3526 | dev->commit_bytes_used); | |
a061fc8d CM |
3527 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
3528 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); | |
3529 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); | |
3530 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); | |
44880fdc | 3531 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_FSID_SIZE); |
a512bbf8 | 3532 | |
a061fc8d CM |
3533 | flags = btrfs_super_flags(sb); |
3534 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); | |
3535 | ||
abbb3b8e | 3536 | ret = write_dev_supers(dev, sb, max_mirrors); |
a236aed1 CM |
3537 | if (ret) |
3538 | total_errors++; | |
f2984462 | 3539 | } |
a236aed1 | 3540 | if (total_errors > max_errors) { |
0b246afa JM |
3541 | btrfs_err(fs_info, "%d errors while writing supers", |
3542 | total_errors); | |
3543 | mutex_unlock(&fs_info->fs_devices->device_list_mutex); | |
79787eaa | 3544 | |
9d565ba4 | 3545 | /* FUA is masked off if unsupported and can't be the reason */ |
0b246afa JM |
3546 | btrfs_handle_fs_error(fs_info, -EIO, |
3547 | "%d errors while writing supers", | |
3548 | total_errors); | |
9d565ba4 | 3549 | return -EIO; |
a236aed1 | 3550 | } |
f2984462 | 3551 | |
a512bbf8 | 3552 | total_errors = 0; |
1538e6c5 | 3553 | list_for_each_entry(dev, head, dev_list) { |
dfe25020 CM |
3554 | if (!dev->bdev) |
3555 | continue; | |
e12c9621 | 3556 | if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &dev->dev_state) || |
ebbede42 | 3557 | !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) |
dfe25020 CM |
3558 | continue; |
3559 | ||
abbb3b8e | 3560 | ret = wait_dev_supers(dev, max_mirrors); |
a512bbf8 YZ |
3561 | if (ret) |
3562 | total_errors++; | |
f2984462 | 3563 | } |
0b246afa | 3564 | mutex_unlock(&fs_info->fs_devices->device_list_mutex); |
a236aed1 | 3565 | if (total_errors > max_errors) { |
0b246afa JM |
3566 | btrfs_handle_fs_error(fs_info, -EIO, |
3567 | "%d errors while writing supers", | |
3568 | total_errors); | |
79787eaa | 3569 | return -EIO; |
a236aed1 | 3570 | } |
f2984462 CM |
3571 | return 0; |
3572 | } | |
3573 | ||
cb517eab MX |
3574 | /* Drop a fs root from the radix tree and free it. */ |
3575 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, | |
3576 | struct btrfs_root *root) | |
2619ba1f | 3577 | { |
4df27c4d | 3578 | spin_lock(&fs_info->fs_roots_radix_lock); |
2619ba1f CM |
3579 | radix_tree_delete(&fs_info->fs_roots_radix, |
3580 | (unsigned long)root->root_key.objectid); | |
4df27c4d | 3581 | spin_unlock(&fs_info->fs_roots_radix_lock); |
76dda93c YZ |
3582 | |
3583 | if (btrfs_root_refs(&root->root_item) == 0) | |
3584 | synchronize_srcu(&fs_info->subvol_srcu); | |
3585 | ||
1c1ea4f7 | 3586 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
3321719e | 3587 | btrfs_free_log(NULL, root); |
1c1ea4f7 LB |
3588 | if (root->reloc_root) { |
3589 | free_extent_buffer(root->reloc_root->node); | |
3590 | free_extent_buffer(root->reloc_root->commit_root); | |
3591 | btrfs_put_fs_root(root->reloc_root); | |
3592 | root->reloc_root = NULL; | |
3593 | } | |
3594 | } | |
3321719e | 3595 | |
faa2dbf0 JB |
3596 | if (root->free_ino_pinned) |
3597 | __btrfs_remove_free_space_cache(root->free_ino_pinned); | |
3598 | if (root->free_ino_ctl) | |
3599 | __btrfs_remove_free_space_cache(root->free_ino_ctl); | |
4df27c4d | 3600 | free_fs_root(root); |
4df27c4d YZ |
3601 | } |
3602 | ||
3603 | static void free_fs_root(struct btrfs_root *root) | |
3604 | { | |
57cdc8db | 3605 | iput(root->ino_cache_inode); |
4df27c4d | 3606 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
2ff7e61e | 3607 | btrfs_free_block_rsv(root->fs_info, root->orphan_block_rsv); |
1cb048f5 | 3608 | root->orphan_block_rsv = NULL; |
0ee5dc67 AV |
3609 | if (root->anon_dev) |
3610 | free_anon_bdev(root->anon_dev); | |
8257b2dc MX |
3611 | if (root->subv_writers) |
3612 | btrfs_free_subvolume_writers(root->subv_writers); | |
4df27c4d YZ |
3613 | free_extent_buffer(root->node); |
3614 | free_extent_buffer(root->commit_root); | |
581bb050 LZ |
3615 | kfree(root->free_ino_ctl); |
3616 | kfree(root->free_ino_pinned); | |
d397712b | 3617 | kfree(root->name); |
b0feb9d9 | 3618 | btrfs_put_fs_root(root); |
2619ba1f CM |
3619 | } |
3620 | ||
cb517eab MX |
3621 | void btrfs_free_fs_root(struct btrfs_root *root) |
3622 | { | |
3623 | free_fs_root(root); | |
2619ba1f CM |
3624 | } |
3625 | ||
c146afad | 3626 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
cfaa7295 | 3627 | { |
c146afad YZ |
3628 | u64 root_objectid = 0; |
3629 | struct btrfs_root *gang[8]; | |
65d33fd7 QW |
3630 | int i = 0; |
3631 | int err = 0; | |
3632 | unsigned int ret = 0; | |
3633 | int index; | |
e089f05c | 3634 | |
c146afad | 3635 | while (1) { |
65d33fd7 | 3636 | index = srcu_read_lock(&fs_info->subvol_srcu); |
c146afad YZ |
3637 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
3638 | (void **)gang, root_objectid, | |
3639 | ARRAY_SIZE(gang)); | |
65d33fd7 QW |
3640 | if (!ret) { |
3641 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
c146afad | 3642 | break; |
65d33fd7 | 3643 | } |
5d4f98a2 | 3644 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
65d33fd7 | 3645 | |
c146afad | 3646 | for (i = 0; i < ret; i++) { |
65d33fd7 QW |
3647 | /* Avoid to grab roots in dead_roots */ |
3648 | if (btrfs_root_refs(&gang[i]->root_item) == 0) { | |
3649 | gang[i] = NULL; | |
3650 | continue; | |
3651 | } | |
3652 | /* grab all the search result for later use */ | |
3653 | gang[i] = btrfs_grab_fs_root(gang[i]); | |
3654 | } | |
3655 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
66b4ffd1 | 3656 | |
65d33fd7 QW |
3657 | for (i = 0; i < ret; i++) { |
3658 | if (!gang[i]) | |
3659 | continue; | |
c146afad | 3660 | root_objectid = gang[i]->root_key.objectid; |
66b4ffd1 JB |
3661 | err = btrfs_orphan_cleanup(gang[i]); |
3662 | if (err) | |
65d33fd7 QW |
3663 | break; |
3664 | btrfs_put_fs_root(gang[i]); | |
c146afad YZ |
3665 | } |
3666 | root_objectid++; | |
3667 | } | |
65d33fd7 QW |
3668 | |
3669 | /* release the uncleaned roots due to error */ | |
3670 | for (; i < ret; i++) { | |
3671 | if (gang[i]) | |
3672 | btrfs_put_fs_root(gang[i]); | |
3673 | } | |
3674 | return err; | |
c146afad | 3675 | } |
a2135011 | 3676 | |
6bccf3ab | 3677 | int btrfs_commit_super(struct btrfs_fs_info *fs_info) |
c146afad | 3678 | { |
6bccf3ab | 3679 | struct btrfs_root *root = fs_info->tree_root; |
c146afad | 3680 | struct btrfs_trans_handle *trans; |
a74a4b97 | 3681 | |
0b246afa | 3682 | mutex_lock(&fs_info->cleaner_mutex); |
2ff7e61e | 3683 | btrfs_run_delayed_iputs(fs_info); |
0b246afa JM |
3684 | mutex_unlock(&fs_info->cleaner_mutex); |
3685 | wake_up_process(fs_info->cleaner_kthread); | |
c71bf099 YZ |
3686 | |
3687 | /* wait until ongoing cleanup work done */ | |
0b246afa JM |
3688 | down_write(&fs_info->cleanup_work_sem); |
3689 | up_write(&fs_info->cleanup_work_sem); | |
c71bf099 | 3690 | |
7a7eaa40 | 3691 | trans = btrfs_join_transaction(root); |
3612b495 TI |
3692 | if (IS_ERR(trans)) |
3693 | return PTR_ERR(trans); | |
3a45bb20 | 3694 | return btrfs_commit_transaction(trans); |
c146afad YZ |
3695 | } |
3696 | ||
6bccf3ab | 3697 | void close_ctree(struct btrfs_fs_info *fs_info) |
c146afad | 3698 | { |
6bccf3ab | 3699 | struct btrfs_root *root = fs_info->tree_root; |
c146afad YZ |
3700 | int ret; |
3701 | ||
afcdd129 | 3702 | set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); |
c146afad | 3703 | |
7343dd61 | 3704 | /* wait for the qgroup rescan worker to stop */ |
d06f23d6 | 3705 | btrfs_qgroup_wait_for_completion(fs_info, false); |
7343dd61 | 3706 | |
803b2f54 SB |
3707 | /* wait for the uuid_scan task to finish */ |
3708 | down(&fs_info->uuid_tree_rescan_sem); | |
3709 | /* avoid complains from lockdep et al., set sem back to initial state */ | |
3710 | up(&fs_info->uuid_tree_rescan_sem); | |
3711 | ||
837d5b6e | 3712 | /* pause restriper - we want to resume on mount */ |
aa1b8cd4 | 3713 | btrfs_pause_balance(fs_info); |
837d5b6e | 3714 | |
8dabb742 SB |
3715 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
3716 | ||
aa1b8cd4 | 3717 | btrfs_scrub_cancel(fs_info); |
4cb5300b CM |
3718 | |
3719 | /* wait for any defraggers to finish */ | |
3720 | wait_event(fs_info->transaction_wait, | |
3721 | (atomic_read(&fs_info->defrag_running) == 0)); | |
3722 | ||
3723 | /* clear out the rbtree of defraggable inodes */ | |
26176e7c | 3724 | btrfs_cleanup_defrag_inodes(fs_info); |
4cb5300b | 3725 | |
21c7e756 MX |
3726 | cancel_work_sync(&fs_info->async_reclaim_work); |
3727 | ||
bc98a42c | 3728 | if (!sb_rdonly(fs_info->sb)) { |
e44163e1 JM |
3729 | /* |
3730 | * If the cleaner thread is stopped and there are | |
3731 | * block groups queued for removal, the deletion will be | |
3732 | * skipped when we quit the cleaner thread. | |
3733 | */ | |
0b246afa | 3734 | btrfs_delete_unused_bgs(fs_info); |
e44163e1 | 3735 | |
6bccf3ab | 3736 | ret = btrfs_commit_super(fs_info); |
acce952b | 3737 | if (ret) |
04892340 | 3738 | btrfs_err(fs_info, "commit super ret %d", ret); |
acce952b | 3739 | } |
3740 | ||
87533c47 | 3741 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
2ff7e61e | 3742 | btrfs_error_commit_super(fs_info); |
0f7d52f4 | 3743 | |
e3029d9f AV |
3744 | kthread_stop(fs_info->transaction_kthread); |
3745 | kthread_stop(fs_info->cleaner_kthread); | |
8929ecfa | 3746 | |
afcdd129 | 3747 | set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); |
f25784b3 | 3748 | |
04892340 | 3749 | btrfs_free_qgroup_config(fs_info); |
bcef60f2 | 3750 | |
963d678b | 3751 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
04892340 | 3752 | btrfs_info(fs_info, "at unmount delalloc count %lld", |
963d678b | 3753 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
b0c68f8b | 3754 | } |
bcc63abb | 3755 | |
6618a59b | 3756 | btrfs_sysfs_remove_mounted(fs_info); |
b7c35e81 | 3757 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); |
5ac1d209 | 3758 | |
faa2dbf0 | 3759 | btrfs_free_fs_roots(fs_info); |
d10c5f31 | 3760 | |
1a4319cc LB |
3761 | btrfs_put_block_group_cache(fs_info); |
3762 | ||
de348ee0 WS |
3763 | /* |
3764 | * we must make sure there is not any read request to | |
3765 | * submit after we stopping all workers. | |
3766 | */ | |
3767 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); | |
96192499 JB |
3768 | btrfs_stop_all_workers(fs_info); |
3769 | ||
5cdd7db6 FM |
3770 | btrfs_free_block_groups(fs_info); |
3771 | ||
afcdd129 | 3772 | clear_bit(BTRFS_FS_OPEN, &fs_info->flags); |
13e6c37b | 3773 | free_root_pointers(fs_info, 1); |
9ad6b7bc | 3774 | |
13e6c37b | 3775 | iput(fs_info->btree_inode); |
d6bfde87 | 3776 | |
21adbd5c | 3777 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
0b246afa | 3778 | if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) |
2ff7e61e | 3779 | btrfsic_unmount(fs_info->fs_devices); |
21adbd5c SB |
3780 | #endif |
3781 | ||
dfe25020 | 3782 | btrfs_close_devices(fs_info->fs_devices); |
0b86a832 | 3783 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
b248a415 | 3784 | |
e2d84521 | 3785 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
963d678b | 3786 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
c404e0dc | 3787 | percpu_counter_destroy(&fs_info->bio_counter); |
76dda93c | 3788 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
0b86a832 | 3789 | |
53b381b3 | 3790 | btrfs_free_stripe_hash_table(fs_info); |
fd708b81 | 3791 | btrfs_free_ref_cache(fs_info); |
53b381b3 | 3792 | |
cdfb080e | 3793 | __btrfs_free_block_rsv(root->orphan_block_rsv); |
1cb048f5 | 3794 | root->orphan_block_rsv = NULL; |
04216820 | 3795 | |
04216820 FM |
3796 | while (!list_empty(&fs_info->pinned_chunks)) { |
3797 | struct extent_map *em; | |
3798 | ||
3799 | em = list_first_entry(&fs_info->pinned_chunks, | |
3800 | struct extent_map, list); | |
3801 | list_del_init(&em->list); | |
3802 | free_extent_map(em); | |
3803 | } | |
eb60ceac CM |
3804 | } |
3805 | ||
b9fab919 CM |
3806 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
3807 | int atomic) | |
5f39d397 | 3808 | { |
1259ab75 | 3809 | int ret; |
727011e0 | 3810 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
1259ab75 | 3811 | |
0b32f4bb | 3812 | ret = extent_buffer_uptodate(buf); |
1259ab75 CM |
3813 | if (!ret) |
3814 | return ret; | |
3815 | ||
3816 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, | |
b9fab919 CM |
3817 | parent_transid, atomic); |
3818 | if (ret == -EAGAIN) | |
3819 | return ret; | |
1259ab75 | 3820 | return !ret; |
5f39d397 CM |
3821 | } |
3822 | ||
5f39d397 CM |
3823 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
3824 | { | |
0b246afa | 3825 | struct btrfs_fs_info *fs_info; |
06ea65a3 | 3826 | struct btrfs_root *root; |
5f39d397 | 3827 | u64 transid = btrfs_header_generation(buf); |
b9473439 | 3828 | int was_dirty; |
b4ce94de | 3829 | |
06ea65a3 JB |
3830 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
3831 | /* | |
3832 | * This is a fast path so only do this check if we have sanity tests | |
3833 | * enabled. Normal people shouldn't be marking dummy buffers as dirty | |
3834 | * outside of the sanity tests. | |
3835 | */ | |
3836 | if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) | |
3837 | return; | |
3838 | #endif | |
3839 | root = BTRFS_I(buf->pages[0]->mapping->host)->root; | |
0b246afa | 3840 | fs_info = root->fs_info; |
b9447ef8 | 3841 | btrfs_assert_tree_locked(buf); |
0b246afa | 3842 | if (transid != fs_info->generation) |
5d163e0e | 3843 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", |
0b246afa | 3844 | buf->start, transid, fs_info->generation); |
0b32f4bb | 3845 | was_dirty = set_extent_buffer_dirty(buf); |
e2d84521 | 3846 | if (!was_dirty) |
104b4e51 NB |
3847 | percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, |
3848 | buf->len, | |
3849 | fs_info->dirty_metadata_batch); | |
1f21ef0a | 3850 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
69fc6cbb QW |
3851 | /* |
3852 | * Since btrfs_mark_buffer_dirty() can be called with item pointer set | |
3853 | * but item data not updated. | |
3854 | * So here we should only check item pointers, not item data. | |
3855 | */ | |
3856 | if (btrfs_header_level(buf) == 0 && | |
2f659546 | 3857 | btrfs_check_leaf_relaxed(fs_info, buf)) { |
a4f78750 | 3858 | btrfs_print_leaf(buf); |
1f21ef0a FM |
3859 | ASSERT(0); |
3860 | } | |
3861 | #endif | |
eb60ceac CM |
3862 | } |
3863 | ||
2ff7e61e | 3864 | static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, |
b53d3f5d | 3865 | int flush_delayed) |
16cdcec7 MX |
3866 | { |
3867 | /* | |
3868 | * looks as though older kernels can get into trouble with | |
3869 | * this code, they end up stuck in balance_dirty_pages forever | |
3870 | */ | |
e2d84521 | 3871 | int ret; |
16cdcec7 MX |
3872 | |
3873 | if (current->flags & PF_MEMALLOC) | |
3874 | return; | |
3875 | ||
b53d3f5d | 3876 | if (flush_delayed) |
2ff7e61e | 3877 | btrfs_balance_delayed_items(fs_info); |
16cdcec7 | 3878 | |
0b246afa | 3879 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
e2d84521 MX |
3880 | BTRFS_DIRTY_METADATA_THRESH); |
3881 | if (ret > 0) { | |
0b246afa | 3882 | balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); |
16cdcec7 | 3883 | } |
16cdcec7 MX |
3884 | } |
3885 | ||
2ff7e61e | 3886 | void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) |
35b7e476 | 3887 | { |
2ff7e61e | 3888 | __btrfs_btree_balance_dirty(fs_info, 1); |
b53d3f5d | 3889 | } |
585ad2c3 | 3890 | |
2ff7e61e | 3891 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) |
b53d3f5d | 3892 | { |
2ff7e61e | 3893 | __btrfs_btree_balance_dirty(fs_info, 0); |
35b7e476 | 3894 | } |
6b80053d | 3895 | |
ca7a79ad | 3896 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
6b80053d | 3897 | { |
727011e0 | 3898 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
2ff7e61e JM |
3899 | struct btrfs_fs_info *fs_info = root->fs_info; |
3900 | ||
3901 | return btree_read_extent_buffer_pages(fs_info, buf, parent_transid); | |
6b80053d | 3902 | } |
0da5468f | 3903 | |
3d3a126a | 3904 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info) |
acce952b | 3905 | { |
c926093e | 3906 | struct btrfs_super_block *sb = fs_info->super_copy; |
319e4d06 QW |
3907 | u64 nodesize = btrfs_super_nodesize(sb); |
3908 | u64 sectorsize = btrfs_super_sectorsize(sb); | |
c926093e DS |
3909 | int ret = 0; |
3910 | ||
319e4d06 | 3911 | if (btrfs_super_magic(sb) != BTRFS_MAGIC) { |
ab8d0fc4 | 3912 | btrfs_err(fs_info, "no valid FS found"); |
319e4d06 QW |
3913 | ret = -EINVAL; |
3914 | } | |
6f794e3c AJ |
3915 | if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) { |
3916 | btrfs_err(fs_info, "unrecognized or unsupported super flag: %llu", | |
319e4d06 | 3917 | btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); |
6f794e3c AJ |
3918 | ret = -EINVAL; |
3919 | } | |
21e7626b | 3920 | if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 3921 | btrfs_err(fs_info, "tree_root level too big: %d >= %d", |
21e7626b | 3922 | btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
3923 | ret = -EINVAL; |
3924 | } | |
21e7626b | 3925 | if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 3926 | btrfs_err(fs_info, "chunk_root level too big: %d >= %d", |
21e7626b | 3927 | btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
3928 | ret = -EINVAL; |
3929 | } | |
21e7626b | 3930 | if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 3931 | btrfs_err(fs_info, "log_root level too big: %d >= %d", |
21e7626b | 3932 | btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
3933 | ret = -EINVAL; |
3934 | } | |
3935 | ||
1104a885 | 3936 | /* |
319e4d06 QW |
3937 | * Check sectorsize and nodesize first, other check will need it. |
3938 | * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. | |
1104a885 | 3939 | */ |
319e4d06 QW |
3940 | if (!is_power_of_2(sectorsize) || sectorsize < 4096 || |
3941 | sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
ab8d0fc4 | 3942 | btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); |
319e4d06 QW |
3943 | ret = -EINVAL; |
3944 | } | |
3945 | /* Only PAGE SIZE is supported yet */ | |
09cbfeaf | 3946 | if (sectorsize != PAGE_SIZE) { |
ab8d0fc4 JM |
3947 | btrfs_err(fs_info, |
3948 | "sectorsize %llu not supported yet, only support %lu", | |
3949 | sectorsize, PAGE_SIZE); | |
319e4d06 QW |
3950 | ret = -EINVAL; |
3951 | } | |
3952 | if (!is_power_of_2(nodesize) || nodesize < sectorsize || | |
3953 | nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
ab8d0fc4 | 3954 | btrfs_err(fs_info, "invalid nodesize %llu", nodesize); |
319e4d06 QW |
3955 | ret = -EINVAL; |
3956 | } | |
3957 | if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { | |
ab8d0fc4 JM |
3958 | btrfs_err(fs_info, "invalid leafsize %u, should be %llu", |
3959 | le32_to_cpu(sb->__unused_leafsize), nodesize); | |
319e4d06 QW |
3960 | ret = -EINVAL; |
3961 | } | |
3962 | ||
3963 | /* Root alignment check */ | |
3964 | if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { | |
ab8d0fc4 JM |
3965 | btrfs_warn(fs_info, "tree_root block unaligned: %llu", |
3966 | btrfs_super_root(sb)); | |
319e4d06 QW |
3967 | ret = -EINVAL; |
3968 | } | |
3969 | if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { | |
ab8d0fc4 JM |
3970 | btrfs_warn(fs_info, "chunk_root block unaligned: %llu", |
3971 | btrfs_super_chunk_root(sb)); | |
75d6ad38 DS |
3972 | ret = -EINVAL; |
3973 | } | |
319e4d06 | 3974 | if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { |
ab8d0fc4 JM |
3975 | btrfs_warn(fs_info, "log_root block unaligned: %llu", |
3976 | btrfs_super_log_root(sb)); | |
75d6ad38 DS |
3977 | ret = -EINVAL; |
3978 | } | |
3979 | ||
44880fdc | 3980 | if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_FSID_SIZE) != 0) { |
ab8d0fc4 JM |
3981 | btrfs_err(fs_info, |
3982 | "dev_item UUID does not match fsid: %pU != %pU", | |
3983 | fs_info->fsid, sb->dev_item.fsid); | |
c926093e DS |
3984 | ret = -EINVAL; |
3985 | } | |
3986 | ||
3987 | /* | |
3988 | * Hint to catch really bogus numbers, bitflips or so, more exact checks are | |
3989 | * done later | |
3990 | */ | |
99e3ecfc LB |
3991 | if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { |
3992 | btrfs_err(fs_info, "bytes_used is too small %llu", | |
ab8d0fc4 | 3993 | btrfs_super_bytes_used(sb)); |
99e3ecfc LB |
3994 | ret = -EINVAL; |
3995 | } | |
b7f67055 | 3996 | if (!is_power_of_2(btrfs_super_stripesize(sb))) { |
99e3ecfc | 3997 | btrfs_err(fs_info, "invalid stripesize %u", |
ab8d0fc4 | 3998 | btrfs_super_stripesize(sb)); |
99e3ecfc LB |
3999 | ret = -EINVAL; |
4000 | } | |
21e7626b | 4001 | if (btrfs_super_num_devices(sb) > (1UL << 31)) |
ab8d0fc4 JM |
4002 | btrfs_warn(fs_info, "suspicious number of devices: %llu", |
4003 | btrfs_super_num_devices(sb)); | |
75d6ad38 | 4004 | if (btrfs_super_num_devices(sb) == 0) { |
ab8d0fc4 | 4005 | btrfs_err(fs_info, "number of devices is 0"); |
75d6ad38 DS |
4006 | ret = -EINVAL; |
4007 | } | |
c926093e | 4008 | |
21e7626b | 4009 | if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { |
ab8d0fc4 JM |
4010 | btrfs_err(fs_info, "super offset mismatch %llu != %u", |
4011 | btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); | |
c926093e DS |
4012 | ret = -EINVAL; |
4013 | } | |
4014 | ||
ce7fca5f DS |
4015 | /* |
4016 | * Obvious sys_chunk_array corruptions, it must hold at least one key | |
4017 | * and one chunk | |
4018 | */ | |
4019 | if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { | |
ab8d0fc4 JM |
4020 | btrfs_err(fs_info, "system chunk array too big %u > %u", |
4021 | btrfs_super_sys_array_size(sb), | |
4022 | BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); | |
ce7fca5f DS |
4023 | ret = -EINVAL; |
4024 | } | |
4025 | if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) | |
4026 | + sizeof(struct btrfs_chunk)) { | |
ab8d0fc4 JM |
4027 | btrfs_err(fs_info, "system chunk array too small %u < %zu", |
4028 | btrfs_super_sys_array_size(sb), | |
4029 | sizeof(struct btrfs_disk_key) | |
4030 | + sizeof(struct btrfs_chunk)); | |
ce7fca5f DS |
4031 | ret = -EINVAL; |
4032 | } | |
4033 | ||
c926093e DS |
4034 | /* |
4035 | * The generation is a global counter, we'll trust it more than the others | |
4036 | * but it's still possible that it's the one that's wrong. | |
4037 | */ | |
21e7626b | 4038 | if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) |
ab8d0fc4 JM |
4039 | btrfs_warn(fs_info, |
4040 | "suspicious: generation < chunk_root_generation: %llu < %llu", | |
4041 | btrfs_super_generation(sb), | |
4042 | btrfs_super_chunk_root_generation(sb)); | |
21e7626b DS |
4043 | if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) |
4044 | && btrfs_super_cache_generation(sb) != (u64)-1) | |
ab8d0fc4 JM |
4045 | btrfs_warn(fs_info, |
4046 | "suspicious: generation < cache_generation: %llu < %llu", | |
4047 | btrfs_super_generation(sb), | |
4048 | btrfs_super_cache_generation(sb)); | |
c926093e DS |
4049 | |
4050 | return ret; | |
acce952b | 4051 | } |
4052 | ||
2ff7e61e | 4053 | static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) |
acce952b | 4054 | { |
0b246afa | 4055 | mutex_lock(&fs_info->cleaner_mutex); |
2ff7e61e | 4056 | btrfs_run_delayed_iputs(fs_info); |
0b246afa | 4057 | mutex_unlock(&fs_info->cleaner_mutex); |
acce952b | 4058 | |
0b246afa JM |
4059 | down_write(&fs_info->cleanup_work_sem); |
4060 | up_write(&fs_info->cleanup_work_sem); | |
acce952b | 4061 | |
4062 | /* cleanup FS via transaction */ | |
2ff7e61e | 4063 | btrfs_cleanup_transaction(fs_info); |
acce952b | 4064 | } |
4065 | ||
143bede5 | 4066 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
acce952b | 4067 | { |
acce952b | 4068 | struct btrfs_ordered_extent *ordered; |
acce952b | 4069 | |
199c2a9c | 4070 | spin_lock(&root->ordered_extent_lock); |
779880ef JB |
4071 | /* |
4072 | * This will just short circuit the ordered completion stuff which will | |
4073 | * make sure the ordered extent gets properly cleaned up. | |
4074 | */ | |
199c2a9c | 4075 | list_for_each_entry(ordered, &root->ordered_extents, |
779880ef JB |
4076 | root_extent_list) |
4077 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); | |
199c2a9c MX |
4078 | spin_unlock(&root->ordered_extent_lock); |
4079 | } | |
4080 | ||
4081 | static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) | |
4082 | { | |
4083 | struct btrfs_root *root; | |
4084 | struct list_head splice; | |
4085 | ||
4086 | INIT_LIST_HEAD(&splice); | |
4087 | ||
4088 | spin_lock(&fs_info->ordered_root_lock); | |
4089 | list_splice_init(&fs_info->ordered_roots, &splice); | |
4090 | while (!list_empty(&splice)) { | |
4091 | root = list_first_entry(&splice, struct btrfs_root, | |
4092 | ordered_root); | |
1de2cfde JB |
4093 | list_move_tail(&root->ordered_root, |
4094 | &fs_info->ordered_roots); | |
199c2a9c | 4095 | |
2a85d9ca | 4096 | spin_unlock(&fs_info->ordered_root_lock); |
199c2a9c MX |
4097 | btrfs_destroy_ordered_extents(root); |
4098 | ||
2a85d9ca LB |
4099 | cond_resched(); |
4100 | spin_lock(&fs_info->ordered_root_lock); | |
199c2a9c MX |
4101 | } |
4102 | spin_unlock(&fs_info->ordered_root_lock); | |
acce952b | 4103 | } |
4104 | ||
35a3621b | 4105 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
2ff7e61e | 4106 | struct btrfs_fs_info *fs_info) |
acce952b | 4107 | { |
4108 | struct rb_node *node; | |
4109 | struct btrfs_delayed_ref_root *delayed_refs; | |
4110 | struct btrfs_delayed_ref_node *ref; | |
4111 | int ret = 0; | |
4112 | ||
4113 | delayed_refs = &trans->delayed_refs; | |
4114 | ||
4115 | spin_lock(&delayed_refs->lock); | |
d7df2c79 | 4116 | if (atomic_read(&delayed_refs->num_entries) == 0) { |
cfece4db | 4117 | spin_unlock(&delayed_refs->lock); |
0b246afa | 4118 | btrfs_info(fs_info, "delayed_refs has NO entry"); |
acce952b | 4119 | return ret; |
4120 | } | |
4121 | ||
d7df2c79 JB |
4122 | while ((node = rb_first(&delayed_refs->href_root)) != NULL) { |
4123 | struct btrfs_delayed_ref_head *head; | |
0e0adbcf | 4124 | struct rb_node *n; |
e78417d1 | 4125 | bool pin_bytes = false; |
acce952b | 4126 | |
d7df2c79 JB |
4127 | head = rb_entry(node, struct btrfs_delayed_ref_head, |
4128 | href_node); | |
4129 | if (!mutex_trylock(&head->mutex)) { | |
d278850e | 4130 | refcount_inc(&head->refs); |
d7df2c79 | 4131 | spin_unlock(&delayed_refs->lock); |
eb12db69 | 4132 | |
d7df2c79 | 4133 | mutex_lock(&head->mutex); |
e78417d1 | 4134 | mutex_unlock(&head->mutex); |
d278850e | 4135 | btrfs_put_delayed_ref_head(head); |
d7df2c79 JB |
4136 | spin_lock(&delayed_refs->lock); |
4137 | continue; | |
4138 | } | |
4139 | spin_lock(&head->lock); | |
0e0adbcf JB |
4140 | while ((n = rb_first(&head->ref_tree)) != NULL) { |
4141 | ref = rb_entry(n, struct btrfs_delayed_ref_node, | |
4142 | ref_node); | |
d7df2c79 | 4143 | ref->in_tree = 0; |
0e0adbcf JB |
4144 | rb_erase(&ref->ref_node, &head->ref_tree); |
4145 | RB_CLEAR_NODE(&ref->ref_node); | |
1d57ee94 WX |
4146 | if (!list_empty(&ref->add_list)) |
4147 | list_del(&ref->add_list); | |
d7df2c79 JB |
4148 | atomic_dec(&delayed_refs->num_entries); |
4149 | btrfs_put_delayed_ref(ref); | |
e78417d1 | 4150 | } |
d7df2c79 JB |
4151 | if (head->must_insert_reserved) |
4152 | pin_bytes = true; | |
4153 | btrfs_free_delayed_extent_op(head->extent_op); | |
4154 | delayed_refs->num_heads--; | |
4155 | if (head->processing == 0) | |
4156 | delayed_refs->num_heads_ready--; | |
4157 | atomic_dec(&delayed_refs->num_entries); | |
d7df2c79 | 4158 | rb_erase(&head->href_node, &delayed_refs->href_root); |
d278850e | 4159 | RB_CLEAR_NODE(&head->href_node); |
d7df2c79 JB |
4160 | spin_unlock(&head->lock); |
4161 | spin_unlock(&delayed_refs->lock); | |
4162 | mutex_unlock(&head->mutex); | |
acce952b | 4163 | |
d7df2c79 | 4164 | if (pin_bytes) |
d278850e JB |
4165 | btrfs_pin_extent(fs_info, head->bytenr, |
4166 | head->num_bytes, 1); | |
4167 | btrfs_put_delayed_ref_head(head); | |
acce952b | 4168 | cond_resched(); |
4169 | spin_lock(&delayed_refs->lock); | |
4170 | } | |
4171 | ||
4172 | spin_unlock(&delayed_refs->lock); | |
4173 | ||
4174 | return ret; | |
4175 | } | |
4176 | ||
143bede5 | 4177 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
acce952b | 4178 | { |
4179 | struct btrfs_inode *btrfs_inode; | |
4180 | struct list_head splice; | |
4181 | ||
4182 | INIT_LIST_HEAD(&splice); | |
4183 | ||
eb73c1b7 MX |
4184 | spin_lock(&root->delalloc_lock); |
4185 | list_splice_init(&root->delalloc_inodes, &splice); | |
acce952b | 4186 | |
4187 | while (!list_empty(&splice)) { | |
eb73c1b7 MX |
4188 | btrfs_inode = list_first_entry(&splice, struct btrfs_inode, |
4189 | delalloc_inodes); | |
acce952b | 4190 | |
4191 | list_del_init(&btrfs_inode->delalloc_inodes); | |
df0af1a5 MX |
4192 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
4193 | &btrfs_inode->runtime_flags); | |
eb73c1b7 | 4194 | spin_unlock(&root->delalloc_lock); |
acce952b | 4195 | |
4196 | btrfs_invalidate_inodes(btrfs_inode->root); | |
b216cbfb | 4197 | |
eb73c1b7 | 4198 | spin_lock(&root->delalloc_lock); |
acce952b | 4199 | } |
4200 | ||
eb73c1b7 MX |
4201 | spin_unlock(&root->delalloc_lock); |
4202 | } | |
4203 | ||
4204 | static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) | |
4205 | { | |
4206 | struct btrfs_root *root; | |
4207 | struct list_head splice; | |
4208 | ||
4209 | INIT_LIST_HEAD(&splice); | |
4210 | ||
4211 | spin_lock(&fs_info->delalloc_root_lock); | |
4212 | list_splice_init(&fs_info->delalloc_roots, &splice); | |
4213 | while (!list_empty(&splice)) { | |
4214 | root = list_first_entry(&splice, struct btrfs_root, | |
4215 | delalloc_root); | |
4216 | list_del_init(&root->delalloc_root); | |
4217 | root = btrfs_grab_fs_root(root); | |
4218 | BUG_ON(!root); | |
4219 | spin_unlock(&fs_info->delalloc_root_lock); | |
4220 | ||
4221 | btrfs_destroy_delalloc_inodes(root); | |
4222 | btrfs_put_fs_root(root); | |
4223 | ||
4224 | spin_lock(&fs_info->delalloc_root_lock); | |
4225 | } | |
4226 | spin_unlock(&fs_info->delalloc_root_lock); | |
acce952b | 4227 | } |
4228 | ||
2ff7e61e | 4229 | static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, |
acce952b | 4230 | struct extent_io_tree *dirty_pages, |
4231 | int mark) | |
4232 | { | |
4233 | int ret; | |
acce952b | 4234 | struct extent_buffer *eb; |
4235 | u64 start = 0; | |
4236 | u64 end; | |
acce952b | 4237 | |
4238 | while (1) { | |
4239 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, | |
e6138876 | 4240 | mark, NULL); |
acce952b | 4241 | if (ret) |
4242 | break; | |
4243 | ||
91166212 | 4244 | clear_extent_bits(dirty_pages, start, end, mark); |
acce952b | 4245 | while (start <= end) { |
0b246afa JM |
4246 | eb = find_extent_buffer(fs_info, start); |
4247 | start += fs_info->nodesize; | |
fd8b2b61 | 4248 | if (!eb) |
acce952b | 4249 | continue; |
fd8b2b61 | 4250 | wait_on_extent_buffer_writeback(eb); |
acce952b | 4251 | |
fd8b2b61 JB |
4252 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
4253 | &eb->bflags)) | |
4254 | clear_extent_buffer_dirty(eb); | |
4255 | free_extent_buffer_stale(eb); | |
acce952b | 4256 | } |
4257 | } | |
4258 | ||
4259 | return ret; | |
4260 | } | |
4261 | ||
2ff7e61e | 4262 | static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, |
acce952b | 4263 | struct extent_io_tree *pinned_extents) |
4264 | { | |
4265 | struct extent_io_tree *unpin; | |
4266 | u64 start; | |
4267 | u64 end; | |
4268 | int ret; | |
ed0eaa14 | 4269 | bool loop = true; |
acce952b | 4270 | |
4271 | unpin = pinned_extents; | |
ed0eaa14 | 4272 | again: |
acce952b | 4273 | while (1) { |
4274 | ret = find_first_extent_bit(unpin, 0, &start, &end, | |
e6138876 | 4275 | EXTENT_DIRTY, NULL); |
acce952b | 4276 | if (ret) |
4277 | break; | |
4278 | ||
af6f8f60 | 4279 | clear_extent_dirty(unpin, start, end); |
2ff7e61e | 4280 | btrfs_error_unpin_extent_range(fs_info, start, end); |
acce952b | 4281 | cond_resched(); |
4282 | } | |
4283 | ||
ed0eaa14 | 4284 | if (loop) { |
0b246afa JM |
4285 | if (unpin == &fs_info->freed_extents[0]) |
4286 | unpin = &fs_info->freed_extents[1]; | |
ed0eaa14 | 4287 | else |
0b246afa | 4288 | unpin = &fs_info->freed_extents[0]; |
ed0eaa14 LB |
4289 | loop = false; |
4290 | goto again; | |
4291 | } | |
4292 | ||
acce952b | 4293 | return 0; |
4294 | } | |
4295 | ||
c79a1751 LB |
4296 | static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache) |
4297 | { | |
4298 | struct inode *inode; | |
4299 | ||
4300 | inode = cache->io_ctl.inode; | |
4301 | if (inode) { | |
4302 | invalidate_inode_pages2(inode->i_mapping); | |
4303 | BTRFS_I(inode)->generation = 0; | |
4304 | cache->io_ctl.inode = NULL; | |
4305 | iput(inode); | |
4306 | } | |
4307 | btrfs_put_block_group(cache); | |
4308 | } | |
4309 | ||
4310 | void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, | |
2ff7e61e | 4311 | struct btrfs_fs_info *fs_info) |
c79a1751 LB |
4312 | { |
4313 | struct btrfs_block_group_cache *cache; | |
4314 | ||
4315 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4316 | while (!list_empty(&cur_trans->dirty_bgs)) { | |
4317 | cache = list_first_entry(&cur_trans->dirty_bgs, | |
4318 | struct btrfs_block_group_cache, | |
4319 | dirty_list); | |
c79a1751 LB |
4320 | |
4321 | if (!list_empty(&cache->io_list)) { | |
4322 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4323 | list_del_init(&cache->io_list); | |
4324 | btrfs_cleanup_bg_io(cache); | |
4325 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4326 | } | |
4327 | ||
4328 | list_del_init(&cache->dirty_list); | |
4329 | spin_lock(&cache->lock); | |
4330 | cache->disk_cache_state = BTRFS_DC_ERROR; | |
4331 | spin_unlock(&cache->lock); | |
4332 | ||
4333 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4334 | btrfs_put_block_group(cache); | |
4335 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4336 | } | |
4337 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4338 | ||
45ae2c18 NB |
4339 | /* |
4340 | * Refer to the definition of io_bgs member for details why it's safe | |
4341 | * to use it without any locking | |
4342 | */ | |
c79a1751 LB |
4343 | while (!list_empty(&cur_trans->io_bgs)) { |
4344 | cache = list_first_entry(&cur_trans->io_bgs, | |
4345 | struct btrfs_block_group_cache, | |
4346 | io_list); | |
c79a1751 LB |
4347 | |
4348 | list_del_init(&cache->io_list); | |
4349 | spin_lock(&cache->lock); | |
4350 | cache->disk_cache_state = BTRFS_DC_ERROR; | |
4351 | spin_unlock(&cache->lock); | |
4352 | btrfs_cleanup_bg_io(cache); | |
4353 | } | |
4354 | } | |
4355 | ||
49b25e05 | 4356 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
2ff7e61e | 4357 | struct btrfs_fs_info *fs_info) |
49b25e05 | 4358 | { |
2ff7e61e | 4359 | btrfs_cleanup_dirty_bgs(cur_trans, fs_info); |
c79a1751 LB |
4360 | ASSERT(list_empty(&cur_trans->dirty_bgs)); |
4361 | ASSERT(list_empty(&cur_trans->io_bgs)); | |
4362 | ||
2ff7e61e | 4363 | btrfs_destroy_delayed_refs(cur_trans, fs_info); |
49b25e05 | 4364 | |
4a9d8bde | 4365 | cur_trans->state = TRANS_STATE_COMMIT_START; |
0b246afa | 4366 | wake_up(&fs_info->transaction_blocked_wait); |
49b25e05 | 4367 | |
4a9d8bde | 4368 | cur_trans->state = TRANS_STATE_UNBLOCKED; |
0b246afa | 4369 | wake_up(&fs_info->transaction_wait); |
49b25e05 | 4370 | |
ccdf9b30 JM |
4371 | btrfs_destroy_delayed_inodes(fs_info); |
4372 | btrfs_assert_delayed_root_empty(fs_info); | |
49b25e05 | 4373 | |
2ff7e61e | 4374 | btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, |
49b25e05 | 4375 | EXTENT_DIRTY); |
2ff7e61e | 4376 | btrfs_destroy_pinned_extent(fs_info, |
0b246afa | 4377 | fs_info->pinned_extents); |
49b25e05 | 4378 | |
4a9d8bde MX |
4379 | cur_trans->state =TRANS_STATE_COMPLETED; |
4380 | wake_up(&cur_trans->commit_wait); | |
49b25e05 JM |
4381 | } |
4382 | ||
2ff7e61e | 4383 | static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) |
acce952b | 4384 | { |
4385 | struct btrfs_transaction *t; | |
acce952b | 4386 | |
0b246afa | 4387 | mutex_lock(&fs_info->transaction_kthread_mutex); |
acce952b | 4388 | |
0b246afa JM |
4389 | spin_lock(&fs_info->trans_lock); |
4390 | while (!list_empty(&fs_info->trans_list)) { | |
4391 | t = list_first_entry(&fs_info->trans_list, | |
724e2315 JB |
4392 | struct btrfs_transaction, list); |
4393 | if (t->state >= TRANS_STATE_COMMIT_START) { | |
9b64f57d | 4394 | refcount_inc(&t->use_count); |
0b246afa | 4395 | spin_unlock(&fs_info->trans_lock); |
2ff7e61e | 4396 | btrfs_wait_for_commit(fs_info, t->transid); |
724e2315 | 4397 | btrfs_put_transaction(t); |
0b246afa | 4398 | spin_lock(&fs_info->trans_lock); |
724e2315 JB |
4399 | continue; |
4400 | } | |
0b246afa | 4401 | if (t == fs_info->running_transaction) { |
724e2315 | 4402 | t->state = TRANS_STATE_COMMIT_DOING; |
0b246afa | 4403 | spin_unlock(&fs_info->trans_lock); |
724e2315 JB |
4404 | /* |
4405 | * We wait for 0 num_writers since we don't hold a trans | |
4406 | * handle open currently for this transaction. | |
4407 | */ | |
4408 | wait_event(t->writer_wait, | |
4409 | atomic_read(&t->num_writers) == 0); | |
4410 | } else { | |
0b246afa | 4411 | spin_unlock(&fs_info->trans_lock); |
724e2315 | 4412 | } |
2ff7e61e | 4413 | btrfs_cleanup_one_transaction(t, fs_info); |
4a9d8bde | 4414 | |
0b246afa JM |
4415 | spin_lock(&fs_info->trans_lock); |
4416 | if (t == fs_info->running_transaction) | |
4417 | fs_info->running_transaction = NULL; | |
acce952b | 4418 | list_del_init(&t->list); |
0b246afa | 4419 | spin_unlock(&fs_info->trans_lock); |
acce952b | 4420 | |
724e2315 | 4421 | btrfs_put_transaction(t); |
2ff7e61e | 4422 | trace_btrfs_transaction_commit(fs_info->tree_root); |
0b246afa | 4423 | spin_lock(&fs_info->trans_lock); |
724e2315 | 4424 | } |
0b246afa JM |
4425 | spin_unlock(&fs_info->trans_lock); |
4426 | btrfs_destroy_all_ordered_extents(fs_info); | |
ccdf9b30 JM |
4427 | btrfs_destroy_delayed_inodes(fs_info); |
4428 | btrfs_assert_delayed_root_empty(fs_info); | |
2ff7e61e | 4429 | btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); |
0b246afa JM |
4430 | btrfs_destroy_all_delalloc_inodes(fs_info); |
4431 | mutex_unlock(&fs_info->transaction_kthread_mutex); | |
acce952b | 4432 | |
4433 | return 0; | |
4434 | } | |
4435 | ||
c6100a4b JB |
4436 | static struct btrfs_fs_info *btree_fs_info(void *private_data) |
4437 | { | |
4438 | struct inode *inode = private_data; | |
4439 | return btrfs_sb(inode->i_sb); | |
4440 | } | |
4441 | ||
e8c9f186 | 4442 | static const struct extent_io_ops btree_extent_io_ops = { |
4d53dddb | 4443 | /* mandatory callbacks */ |
0b86a832 | 4444 | .submit_bio_hook = btree_submit_bio_hook, |
4d53dddb | 4445 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
239b14b3 CM |
4446 | /* note we're sharing with inode.c for the merge bio hook */ |
4447 | .merge_bio_hook = btrfs_merge_bio_hook, | |
20a7db8a | 4448 | .readpage_io_failed_hook = btree_io_failed_hook, |
c6100a4b JB |
4449 | .set_range_writeback = btrfs_set_range_writeback, |
4450 | .tree_fs_info = btree_fs_info, | |
4d53dddb DS |
4451 | |
4452 | /* optional callbacks */ | |
0da5468f | 4453 | }; |