Commit | Line | Data |
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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> |
7e75bf3f | 33 | #include <asm/unaligned.h> |
eb60ceac CM |
34 | #include "ctree.h" |
35 | #include "disk-io.h" | |
0b947aff | 36 | #include "hash.h" |
e089f05c | 37 | #include "transaction.h" |
0f7d52f4 | 38 | #include "btrfs_inode.h" |
0b86a832 | 39 | #include "volumes.h" |
db94535d | 40 | #include "print-tree.h" |
925baedd | 41 | #include "locking.h" |
e02119d5 | 42 | #include "tree-log.h" |
fa9c0d79 | 43 | #include "free-space-cache.h" |
70f6d82e | 44 | #include "free-space-tree.h" |
581bb050 | 45 | #include "inode-map.h" |
21adbd5c | 46 | #include "check-integrity.h" |
606686ee | 47 | #include "rcu-string.h" |
8dabb742 | 48 | #include "dev-replace.h" |
53b381b3 | 49 | #include "raid56.h" |
5ac1d209 | 50 | #include "sysfs.h" |
fcebe456 | 51 | #include "qgroup.h" |
ebb8765b | 52 | #include "compression.h" |
eb60ceac | 53 | |
de0022b9 JB |
54 | #ifdef CONFIG_X86 |
55 | #include <asm/cpufeature.h> | |
56 | #endif | |
57 | ||
319e4d06 QW |
58 | #define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ |
59 | BTRFS_HEADER_FLAG_RELOC |\ | |
60 | BTRFS_SUPER_FLAG_ERROR |\ | |
61 | BTRFS_SUPER_FLAG_SEEDING |\ | |
62 | BTRFS_SUPER_FLAG_METADUMP) | |
63 | ||
e8c9f186 | 64 | static const struct extent_io_ops btree_extent_io_ops; |
8b712842 | 65 | static void end_workqueue_fn(struct btrfs_work *work); |
4df27c4d | 66 | static void free_fs_root(struct btrfs_root *root); |
fcd1f065 | 67 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 68 | int read_only); |
143bede5 | 69 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
acce952b | 70 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
2ff7e61e | 71 | struct btrfs_fs_info *fs_info); |
143bede5 | 72 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
2ff7e61e | 73 | static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, |
acce952b | 74 | struct extent_io_tree *dirty_pages, |
75 | int mark); | |
2ff7e61e | 76 | static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, |
acce952b | 77 | struct extent_io_tree *pinned_extents); |
2ff7e61e JM |
78 | static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info); |
79 | static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info); | |
ce9adaa5 | 80 | |
d352ac68 | 81 | /* |
97eb6b69 DS |
82 | * btrfs_end_io_wq structs are used to do processing in task context when an IO |
83 | * is complete. This is used during reads to verify checksums, and it is used | |
d352ac68 CM |
84 | * by writes to insert metadata for new file extents after IO is complete. |
85 | */ | |
97eb6b69 | 86 | struct btrfs_end_io_wq { |
ce9adaa5 CM |
87 | struct bio *bio; |
88 | bio_end_io_t *end_io; | |
89 | void *private; | |
90 | struct btrfs_fs_info *info; | |
91 | int error; | |
bfebd8b5 | 92 | enum btrfs_wq_endio_type metadata; |
ce9adaa5 | 93 | struct list_head list; |
8b712842 | 94 | struct btrfs_work work; |
ce9adaa5 | 95 | }; |
0da5468f | 96 | |
97eb6b69 DS |
97 | static struct kmem_cache *btrfs_end_io_wq_cache; |
98 | ||
99 | int __init btrfs_end_io_wq_init(void) | |
100 | { | |
101 | btrfs_end_io_wq_cache = kmem_cache_create("btrfs_end_io_wq", | |
102 | sizeof(struct btrfs_end_io_wq), | |
103 | 0, | |
fba4b697 | 104 | SLAB_MEM_SPREAD, |
97eb6b69 DS |
105 | NULL); |
106 | if (!btrfs_end_io_wq_cache) | |
107 | return -ENOMEM; | |
108 | return 0; | |
109 | } | |
110 | ||
111 | void btrfs_end_io_wq_exit(void) | |
112 | { | |
5598e900 | 113 | kmem_cache_destroy(btrfs_end_io_wq_cache); |
97eb6b69 DS |
114 | } |
115 | ||
d352ac68 CM |
116 | /* |
117 | * async submit bios are used to offload expensive checksumming | |
118 | * onto the worker threads. They checksum file and metadata bios | |
119 | * just before they are sent down the IO stack. | |
120 | */ | |
44b8bd7e CM |
121 | struct async_submit_bio { |
122 | struct inode *inode; | |
123 | struct bio *bio; | |
124 | struct list_head list; | |
4a69a410 CM |
125 | extent_submit_bio_hook_t *submit_bio_start; |
126 | extent_submit_bio_hook_t *submit_bio_done; | |
44b8bd7e | 127 | int mirror_num; |
c8b97818 | 128 | unsigned long bio_flags; |
eaf25d93 CM |
129 | /* |
130 | * bio_offset is optional, can be used if the pages in the bio | |
131 | * can't tell us where in the file the bio should go | |
132 | */ | |
133 | u64 bio_offset; | |
8b712842 | 134 | struct btrfs_work work; |
79787eaa | 135 | int error; |
44b8bd7e CM |
136 | }; |
137 | ||
85d4e461 CM |
138 | /* |
139 | * Lockdep class keys for extent_buffer->lock's in this root. For a given | |
140 | * eb, the lockdep key is determined by the btrfs_root it belongs to and | |
141 | * the level the eb occupies in the tree. | |
142 | * | |
143 | * Different roots are used for different purposes and may nest inside each | |
144 | * other and they require separate keysets. As lockdep keys should be | |
145 | * static, assign keysets according to the purpose of the root as indicated | |
146 | * by btrfs_root->objectid. This ensures that all special purpose roots | |
147 | * have separate keysets. | |
4008c04a | 148 | * |
85d4e461 CM |
149 | * Lock-nesting across peer nodes is always done with the immediate parent |
150 | * node locked thus preventing deadlock. As lockdep doesn't know this, use | |
151 | * subclass to avoid triggering lockdep warning in such cases. | |
4008c04a | 152 | * |
85d4e461 CM |
153 | * The key is set by the readpage_end_io_hook after the buffer has passed |
154 | * csum validation but before the pages are unlocked. It is also set by | |
155 | * btrfs_init_new_buffer on freshly allocated blocks. | |
4008c04a | 156 | * |
85d4e461 CM |
157 | * We also add a check to make sure the highest level of the tree is the |
158 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code | |
159 | * needs update as well. | |
4008c04a CM |
160 | */ |
161 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
162 | # if BTRFS_MAX_LEVEL != 8 | |
163 | # error | |
164 | # endif | |
85d4e461 CM |
165 | |
166 | static struct btrfs_lockdep_keyset { | |
167 | u64 id; /* root objectid */ | |
168 | const char *name_stem; /* lock name stem */ | |
169 | char names[BTRFS_MAX_LEVEL + 1][20]; | |
170 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; | |
171 | } btrfs_lockdep_keysets[] = { | |
172 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, | |
173 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, | |
174 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, | |
175 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, | |
176 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, | |
177 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, | |
60b62978 | 178 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
85d4e461 CM |
179 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
180 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, | |
181 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, | |
13fd8da9 | 182 | { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, |
6b20e0ad | 183 | { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, .name_stem = "free-space" }, |
85d4e461 | 184 | { .id = 0, .name_stem = "tree" }, |
4008c04a | 185 | }; |
85d4e461 CM |
186 | |
187 | void __init btrfs_init_lockdep(void) | |
188 | { | |
189 | int i, j; | |
190 | ||
191 | /* initialize lockdep class names */ | |
192 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { | |
193 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; | |
194 | ||
195 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) | |
196 | snprintf(ks->names[j], sizeof(ks->names[j]), | |
197 | "btrfs-%s-%02d", ks->name_stem, j); | |
198 | } | |
199 | } | |
200 | ||
201 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, | |
202 | int level) | |
203 | { | |
204 | struct btrfs_lockdep_keyset *ks; | |
205 | ||
206 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); | |
207 | ||
208 | /* find the matching keyset, id 0 is the default entry */ | |
209 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) | |
210 | if (ks->id == objectid) | |
211 | break; | |
212 | ||
213 | lockdep_set_class_and_name(&eb->lock, | |
214 | &ks->keys[level], ks->names[level]); | |
215 | } | |
216 | ||
4008c04a CM |
217 | #endif |
218 | ||
d352ac68 CM |
219 | /* |
220 | * extents on the btree inode are pretty simple, there's one extent | |
221 | * that covers the entire device | |
222 | */ | |
b2950863 | 223 | static struct extent_map *btree_get_extent(struct inode *inode, |
306e16ce | 224 | struct page *page, size_t pg_offset, u64 start, u64 len, |
b2950863 | 225 | int create) |
7eccb903 | 226 | { |
0b246afa | 227 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
5f39d397 CM |
228 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
229 | struct extent_map *em; | |
230 | int ret; | |
231 | ||
890871be | 232 | read_lock(&em_tree->lock); |
d1310b2e | 233 | em = lookup_extent_mapping(em_tree, start, len); |
a061fc8d | 234 | if (em) { |
0b246afa | 235 | em->bdev = fs_info->fs_devices->latest_bdev; |
890871be | 236 | read_unlock(&em_tree->lock); |
5f39d397 | 237 | goto out; |
a061fc8d | 238 | } |
890871be | 239 | read_unlock(&em_tree->lock); |
7b13b7b1 | 240 | |
172ddd60 | 241 | em = alloc_extent_map(); |
5f39d397 CM |
242 | if (!em) { |
243 | em = ERR_PTR(-ENOMEM); | |
244 | goto out; | |
245 | } | |
246 | em->start = 0; | |
0afbaf8c | 247 | em->len = (u64)-1; |
c8b97818 | 248 | em->block_len = (u64)-1; |
5f39d397 | 249 | em->block_start = 0; |
0b246afa | 250 | em->bdev = fs_info->fs_devices->latest_bdev; |
d1310b2e | 251 | |
890871be | 252 | write_lock(&em_tree->lock); |
09a2a8f9 | 253 | ret = add_extent_mapping(em_tree, em, 0); |
5f39d397 CM |
254 | if (ret == -EEXIST) { |
255 | free_extent_map(em); | |
7b13b7b1 | 256 | em = lookup_extent_mapping(em_tree, start, len); |
b4f359ab | 257 | if (!em) |
0433f20d | 258 | em = ERR_PTR(-EIO); |
5f39d397 | 259 | } else if (ret) { |
7b13b7b1 | 260 | free_extent_map(em); |
0433f20d | 261 | em = ERR_PTR(ret); |
5f39d397 | 262 | } |
890871be | 263 | write_unlock(&em_tree->lock); |
7b13b7b1 | 264 | |
5f39d397 CM |
265 | out: |
266 | return em; | |
7eccb903 CM |
267 | } |
268 | ||
b0496686 | 269 | u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
19c00ddc | 270 | { |
0b947aff | 271 | return btrfs_crc32c(seed, data, len); |
19c00ddc CM |
272 | } |
273 | ||
0b5e3daf | 274 | void btrfs_csum_final(u32 crc, u8 *result) |
19c00ddc | 275 | { |
7e75bf3f | 276 | put_unaligned_le32(~crc, result); |
19c00ddc CM |
277 | } |
278 | ||
d352ac68 CM |
279 | /* |
280 | * compute the csum for a btree block, and either verify it or write it | |
281 | * into the csum field of the block. | |
282 | */ | |
01d58472 DD |
283 | static int csum_tree_block(struct btrfs_fs_info *fs_info, |
284 | struct extent_buffer *buf, | |
19c00ddc CM |
285 | int verify) |
286 | { | |
01d58472 | 287 | u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); |
607d432d | 288 | char *result = NULL; |
19c00ddc CM |
289 | unsigned long len; |
290 | unsigned long cur_len; | |
291 | unsigned long offset = BTRFS_CSUM_SIZE; | |
19c00ddc CM |
292 | char *kaddr; |
293 | unsigned long map_start; | |
294 | unsigned long map_len; | |
295 | int err; | |
296 | u32 crc = ~(u32)0; | |
607d432d | 297 | unsigned long inline_result; |
19c00ddc CM |
298 | |
299 | len = buf->len - offset; | |
d397712b | 300 | while (len > 0) { |
19c00ddc | 301 | err = map_private_extent_buffer(buf, offset, 32, |
a6591715 | 302 | &kaddr, &map_start, &map_len); |
d397712b | 303 | if (err) |
8bd98f0e | 304 | return err; |
19c00ddc | 305 | cur_len = min(len, map_len - (offset - map_start)); |
b0496686 | 306 | crc = btrfs_csum_data(kaddr + offset - map_start, |
19c00ddc CM |
307 | crc, cur_len); |
308 | len -= cur_len; | |
309 | offset += cur_len; | |
19c00ddc | 310 | } |
607d432d | 311 | if (csum_size > sizeof(inline_result)) { |
31e818fe | 312 | result = kzalloc(csum_size, GFP_NOFS); |
607d432d | 313 | if (!result) |
8bd98f0e | 314 | return -ENOMEM; |
607d432d JB |
315 | } else { |
316 | result = (char *)&inline_result; | |
317 | } | |
318 | ||
19c00ddc CM |
319 | btrfs_csum_final(crc, result); |
320 | ||
321 | if (verify) { | |
607d432d | 322 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
e4204ded CM |
323 | u32 val; |
324 | u32 found = 0; | |
607d432d | 325 | memcpy(&found, result, csum_size); |
e4204ded | 326 | |
607d432d | 327 | read_extent_buffer(buf, &val, 0, csum_size); |
94647322 | 328 | btrfs_warn_rl(fs_info, |
5d163e0e | 329 | "%s checksum verify failed on %llu wanted %X found %X level %d", |
01d58472 | 330 | fs_info->sb->s_id, buf->start, |
efe120a0 | 331 | val, found, btrfs_header_level(buf)); |
607d432d JB |
332 | if (result != (char *)&inline_result) |
333 | kfree(result); | |
8bd98f0e | 334 | return -EUCLEAN; |
19c00ddc CM |
335 | } |
336 | } else { | |
607d432d | 337 | write_extent_buffer(buf, result, 0, csum_size); |
19c00ddc | 338 | } |
607d432d JB |
339 | if (result != (char *)&inline_result) |
340 | kfree(result); | |
19c00ddc CM |
341 | return 0; |
342 | } | |
343 | ||
d352ac68 CM |
344 | /* |
345 | * we can't consider a given block up to date unless the transid of the | |
346 | * block matches the transid in the parent node's pointer. This is how we | |
347 | * detect blocks that either didn't get written at all or got written | |
348 | * in the wrong place. | |
349 | */ | |
1259ab75 | 350 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
b9fab919 CM |
351 | struct extent_buffer *eb, u64 parent_transid, |
352 | int atomic) | |
1259ab75 | 353 | { |
2ac55d41 | 354 | struct extent_state *cached_state = NULL; |
1259ab75 | 355 | int ret; |
2755a0de | 356 | bool need_lock = (current->journal_info == BTRFS_SEND_TRANS_STUB); |
1259ab75 CM |
357 | |
358 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) | |
359 | return 0; | |
360 | ||
b9fab919 CM |
361 | if (atomic) |
362 | return -EAGAIN; | |
363 | ||
a26e8c9f JB |
364 | if (need_lock) { |
365 | btrfs_tree_read_lock(eb); | |
366 | btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); | |
367 | } | |
368 | ||
2ac55d41 | 369 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
ff13db41 | 370 | &cached_state); |
0b32f4bb | 371 | if (extent_buffer_uptodate(eb) && |
1259ab75 CM |
372 | btrfs_header_generation(eb) == parent_transid) { |
373 | ret = 0; | |
374 | goto out; | |
375 | } | |
94647322 DS |
376 | btrfs_err_rl(eb->fs_info, |
377 | "parent transid verify failed on %llu wanted %llu found %llu", | |
378 | eb->start, | |
29549aec | 379 | parent_transid, btrfs_header_generation(eb)); |
1259ab75 | 380 | ret = 1; |
a26e8c9f JB |
381 | |
382 | /* | |
383 | * Things reading via commit roots that don't have normal protection, | |
384 | * like send, can have a really old block in cache that may point at a | |
01327610 | 385 | * block that has been freed and re-allocated. So don't clear uptodate |
a26e8c9f JB |
386 | * if we find an eb that is under IO (dirty/writeback) because we could |
387 | * end up reading in the stale data and then writing it back out and | |
388 | * making everybody very sad. | |
389 | */ | |
390 | if (!extent_buffer_under_io(eb)) | |
391 | clear_extent_buffer_uptodate(eb); | |
33958dc6 | 392 | out: |
2ac55d41 JB |
393 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
394 | &cached_state, GFP_NOFS); | |
472b909f JB |
395 | if (need_lock) |
396 | btrfs_tree_read_unlock_blocking(eb); | |
1259ab75 | 397 | return ret; |
1259ab75 CM |
398 | } |
399 | ||
1104a885 DS |
400 | /* |
401 | * Return 0 if the superblock checksum type matches the checksum value of that | |
402 | * algorithm. Pass the raw disk superblock data. | |
403 | */ | |
ab8d0fc4 JM |
404 | static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, |
405 | char *raw_disk_sb) | |
1104a885 DS |
406 | { |
407 | struct btrfs_super_block *disk_sb = | |
408 | (struct btrfs_super_block *)raw_disk_sb; | |
409 | u16 csum_type = btrfs_super_csum_type(disk_sb); | |
410 | int ret = 0; | |
411 | ||
412 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { | |
413 | u32 crc = ~(u32)0; | |
414 | const int csum_size = sizeof(crc); | |
415 | char result[csum_size]; | |
416 | ||
417 | /* | |
418 | * The super_block structure does not span the whole | |
419 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space | |
01327610 | 420 | * is filled with zeros and is included in the checksum. |
1104a885 DS |
421 | */ |
422 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, | |
423 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); | |
424 | btrfs_csum_final(crc, result); | |
425 | ||
426 | if (memcmp(raw_disk_sb, result, csum_size)) | |
427 | ret = 1; | |
428 | } | |
429 | ||
430 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { | |
ab8d0fc4 | 431 | btrfs_err(fs_info, "unsupported checksum algorithm %u", |
1104a885 DS |
432 | csum_type); |
433 | ret = 1; | |
434 | } | |
435 | ||
436 | return ret; | |
437 | } | |
438 | ||
d352ac68 CM |
439 | /* |
440 | * helper to read a given tree block, doing retries as required when | |
441 | * the checksums don't match and we have alternate mirrors to try. | |
442 | */ | |
2ff7e61e | 443 | static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info, |
f188591e | 444 | struct extent_buffer *eb, |
8436ea91 | 445 | u64 parent_transid) |
f188591e CM |
446 | { |
447 | struct extent_io_tree *io_tree; | |
ea466794 | 448 | int failed = 0; |
f188591e CM |
449 | int ret; |
450 | int num_copies = 0; | |
451 | int mirror_num = 0; | |
ea466794 | 452 | int failed_mirror = 0; |
f188591e | 453 | |
a826d6dc | 454 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
0b246afa | 455 | io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree; |
f188591e | 456 | while (1) { |
8436ea91 | 457 | ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE, |
f188591e | 458 | btree_get_extent, mirror_num); |
256dd1bb SB |
459 | if (!ret) { |
460 | if (!verify_parent_transid(io_tree, eb, | |
b9fab919 | 461 | parent_transid, 0)) |
256dd1bb SB |
462 | break; |
463 | else | |
464 | ret = -EIO; | |
465 | } | |
d397712b | 466 | |
a826d6dc JB |
467 | /* |
468 | * This buffer's crc is fine, but its contents are corrupted, so | |
469 | * there is no reason to read the other copies, they won't be | |
470 | * any less wrong. | |
471 | */ | |
472 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) | |
ea466794 JB |
473 | break; |
474 | ||
0b246afa | 475 | num_copies = btrfs_num_copies(fs_info, |
f188591e | 476 | eb->start, eb->len); |
4235298e | 477 | if (num_copies == 1) |
ea466794 | 478 | break; |
4235298e | 479 | |
5cf1ab56 JB |
480 | if (!failed_mirror) { |
481 | failed = 1; | |
482 | failed_mirror = eb->read_mirror; | |
483 | } | |
484 | ||
f188591e | 485 | mirror_num++; |
ea466794 JB |
486 | if (mirror_num == failed_mirror) |
487 | mirror_num++; | |
488 | ||
4235298e | 489 | if (mirror_num > num_copies) |
ea466794 | 490 | break; |
f188591e | 491 | } |
ea466794 | 492 | |
c0901581 | 493 | if (failed && !ret && failed_mirror) |
2ff7e61e | 494 | repair_eb_io_failure(fs_info, eb, failed_mirror); |
ea466794 JB |
495 | |
496 | return ret; | |
f188591e | 497 | } |
19c00ddc | 498 | |
d352ac68 | 499 | /* |
d397712b CM |
500 | * checksum a dirty tree block before IO. This has extra checks to make sure |
501 | * we only fill in the checksum field in the first page of a multi-page block | |
d352ac68 | 502 | */ |
d397712b | 503 | |
01d58472 | 504 | static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) |
19c00ddc | 505 | { |
4eee4fa4 | 506 | u64 start = page_offset(page); |
19c00ddc | 507 | u64 found_start; |
19c00ddc | 508 | struct extent_buffer *eb; |
f188591e | 509 | |
4f2de97a JB |
510 | eb = (struct extent_buffer *)page->private; |
511 | if (page != eb->pages[0]) | |
512 | return 0; | |
0f805531 | 513 | |
19c00ddc | 514 | found_start = btrfs_header_bytenr(eb); |
0f805531 AL |
515 | /* |
516 | * Please do not consolidate these warnings into a single if. | |
517 | * It is useful to know what went wrong. | |
518 | */ | |
519 | if (WARN_ON(found_start != start)) | |
520 | return -EUCLEAN; | |
521 | if (WARN_ON(!PageUptodate(page))) | |
522 | return -EUCLEAN; | |
523 | ||
524 | ASSERT(memcmp_extent_buffer(eb, fs_info->fsid, | |
525 | btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0); | |
526 | ||
8bd98f0e | 527 | return csum_tree_block(fs_info, eb, 0); |
19c00ddc CM |
528 | } |
529 | ||
01d58472 | 530 | static int check_tree_block_fsid(struct btrfs_fs_info *fs_info, |
2b82032c YZ |
531 | struct extent_buffer *eb) |
532 | { | |
01d58472 | 533 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
2b82032c YZ |
534 | u8 fsid[BTRFS_UUID_SIZE]; |
535 | int ret = 1; | |
536 | ||
0a4e5586 | 537 | read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); |
2b82032c YZ |
538 | while (fs_devices) { |
539 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { | |
540 | ret = 0; | |
541 | break; | |
542 | } | |
543 | fs_devices = fs_devices->seed; | |
544 | } | |
545 | return ret; | |
546 | } | |
547 | ||
0b246afa JM |
548 | #define CORRUPT(reason, eb, root, slot) \ |
549 | btrfs_crit(root->fs_info, \ | |
550 | "corrupt %s, %s: block=%llu, root=%llu, slot=%d", \ | |
551 | btrfs_header_level(eb) == 0 ? "leaf" : "node", \ | |
6b722c17 | 552 | reason, btrfs_header_bytenr(eb), root->objectid, slot) |
a826d6dc JB |
553 | |
554 | static noinline int check_leaf(struct btrfs_root *root, | |
555 | struct extent_buffer *leaf) | |
556 | { | |
0b246afa | 557 | struct btrfs_fs_info *fs_info = root->fs_info; |
a826d6dc JB |
558 | struct btrfs_key key; |
559 | struct btrfs_key leaf_key; | |
560 | u32 nritems = btrfs_header_nritems(leaf); | |
561 | int slot; | |
562 | ||
f177d739 FM |
563 | /* |
564 | * Extent buffers from a relocation tree have a owner field that | |
565 | * corresponds to the subvolume tree they are based on. So just from an | |
566 | * extent buffer alone we can not find out what is the id of the | |
567 | * corresponding subvolume tree, so we can not figure out if the extent | |
568 | * buffer corresponds to the root of the relocation tree or not. So skip | |
569 | * this check for relocation trees. | |
570 | */ | |
571 | if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) { | |
1ba98d08 LB |
572 | struct btrfs_root *check_root; |
573 | ||
574 | key.objectid = btrfs_header_owner(leaf); | |
575 | key.type = BTRFS_ROOT_ITEM_KEY; | |
576 | key.offset = (u64)-1; | |
577 | ||
0b246afa | 578 | check_root = btrfs_get_fs_root(fs_info, &key, false); |
1ba98d08 LB |
579 | /* |
580 | * The only reason we also check NULL here is that during | |
581 | * open_ctree() some roots has not yet been set up. | |
582 | */ | |
583 | if (!IS_ERR_OR_NULL(check_root)) { | |
ef85b25e LB |
584 | struct extent_buffer *eb; |
585 | ||
586 | eb = btrfs_root_node(check_root); | |
1ba98d08 | 587 | /* if leaf is the root, then it's fine */ |
ef85b25e | 588 | if (leaf != eb) { |
1ba98d08 | 589 | CORRUPT("non-root leaf's nritems is 0", |
ef85b25e LB |
590 | leaf, check_root, 0); |
591 | free_extent_buffer(eb); | |
1ba98d08 LB |
592 | return -EIO; |
593 | } | |
ef85b25e | 594 | free_extent_buffer(eb); |
1ba98d08 | 595 | } |
a826d6dc | 596 | return 0; |
1ba98d08 | 597 | } |
a826d6dc | 598 | |
f177d739 FM |
599 | if (nritems == 0) |
600 | return 0; | |
601 | ||
a826d6dc JB |
602 | /* Check the 0 item */ |
603 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != | |
0b246afa | 604 | BTRFS_LEAF_DATA_SIZE(fs_info)) { |
a826d6dc JB |
605 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
606 | return -EIO; | |
607 | } | |
608 | ||
609 | /* | |
610 | * Check to make sure each items keys are in the correct order and their | |
611 | * offsets make sense. We only have to loop through nritems-1 because | |
612 | * we check the current slot against the next slot, which verifies the | |
613 | * next slot's offset+size makes sense and that the current's slot | |
614 | * offset is correct. | |
615 | */ | |
616 | for (slot = 0; slot < nritems - 1; slot++) { | |
617 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); | |
618 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); | |
619 | ||
620 | /* Make sure the keys are in the right order */ | |
621 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { | |
622 | CORRUPT("bad key order", leaf, root, slot); | |
623 | return -EIO; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Make sure the offset and ends are right, remember that the | |
628 | * item data starts at the end of the leaf and grows towards the | |
629 | * front. | |
630 | */ | |
631 | if (btrfs_item_offset_nr(leaf, slot) != | |
632 | btrfs_item_end_nr(leaf, slot + 1)) { | |
633 | CORRUPT("slot offset bad", leaf, root, slot); | |
634 | return -EIO; | |
635 | } | |
636 | ||
637 | /* | |
638 | * Check to make sure that we don't point outside of the leaf, | |
01327610 | 639 | * just in case all the items are consistent to each other, but |
a826d6dc JB |
640 | * all point outside of the leaf. |
641 | */ | |
642 | if (btrfs_item_end_nr(leaf, slot) > | |
0b246afa | 643 | BTRFS_LEAF_DATA_SIZE(fs_info)) { |
a826d6dc JB |
644 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
645 | return -EIO; | |
646 | } | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
053ab70f LB |
652 | static int check_node(struct btrfs_root *root, struct extent_buffer *node) |
653 | { | |
654 | unsigned long nr = btrfs_header_nritems(node); | |
6b722c17 LB |
655 | struct btrfs_key key, next_key; |
656 | int slot; | |
657 | u64 bytenr; | |
658 | int ret = 0; | |
053ab70f | 659 | |
da17066c | 660 | if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root->fs_info)) { |
053ab70f LB |
661 | btrfs_crit(root->fs_info, |
662 | "corrupt node: block %llu root %llu nritems %lu", | |
663 | node->start, root->objectid, nr); | |
664 | return -EIO; | |
665 | } | |
6b722c17 LB |
666 | |
667 | for (slot = 0; slot < nr - 1; slot++) { | |
668 | bytenr = btrfs_node_blockptr(node, slot); | |
669 | btrfs_node_key_to_cpu(node, &key, slot); | |
670 | btrfs_node_key_to_cpu(node, &next_key, slot + 1); | |
671 | ||
672 | if (!bytenr) { | |
673 | CORRUPT("invalid item slot", node, root, slot); | |
674 | ret = -EIO; | |
675 | goto out; | |
676 | } | |
677 | ||
678 | if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) { | |
679 | CORRUPT("bad key order", node, root, slot); | |
680 | ret = -EIO; | |
681 | goto out; | |
682 | } | |
683 | } | |
684 | out: | |
685 | return ret; | |
053ab70f LB |
686 | } |
687 | ||
facc8a22 MX |
688 | static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, |
689 | u64 phy_offset, struct page *page, | |
690 | u64 start, u64 end, int mirror) | |
ce9adaa5 | 691 | { |
ce9adaa5 CM |
692 | u64 found_start; |
693 | int found_level; | |
ce9adaa5 CM |
694 | struct extent_buffer *eb; |
695 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
02873e43 | 696 | struct btrfs_fs_info *fs_info = root->fs_info; |
f188591e | 697 | int ret = 0; |
727011e0 | 698 | int reads_done; |
ce9adaa5 | 699 | |
ce9adaa5 CM |
700 | if (!page->private) |
701 | goto out; | |
d397712b | 702 | |
4f2de97a | 703 | eb = (struct extent_buffer *)page->private; |
d397712b | 704 | |
0b32f4bb JB |
705 | /* the pending IO might have been the only thing that kept this buffer |
706 | * in memory. Make sure we have a ref for all this other checks | |
707 | */ | |
708 | extent_buffer_get(eb); | |
709 | ||
710 | reads_done = atomic_dec_and_test(&eb->io_pages); | |
727011e0 CM |
711 | if (!reads_done) |
712 | goto err; | |
f188591e | 713 | |
5cf1ab56 | 714 | eb->read_mirror = mirror; |
656f30db | 715 | if (test_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags)) { |
ea466794 JB |
716 | ret = -EIO; |
717 | goto err; | |
718 | } | |
719 | ||
ce9adaa5 | 720 | found_start = btrfs_header_bytenr(eb); |
727011e0 | 721 | if (found_start != eb->start) { |
02873e43 ZL |
722 | btrfs_err_rl(fs_info, "bad tree block start %llu %llu", |
723 | found_start, eb->start); | |
f188591e | 724 | ret = -EIO; |
ce9adaa5 CM |
725 | goto err; |
726 | } | |
02873e43 ZL |
727 | if (check_tree_block_fsid(fs_info, eb)) { |
728 | btrfs_err_rl(fs_info, "bad fsid on block %llu", | |
729 | eb->start); | |
1259ab75 CM |
730 | ret = -EIO; |
731 | goto err; | |
732 | } | |
ce9adaa5 | 733 | found_level = btrfs_header_level(eb); |
1c24c3ce | 734 | if (found_level >= BTRFS_MAX_LEVEL) { |
02873e43 ZL |
735 | btrfs_err(fs_info, "bad tree block level %d", |
736 | (int)btrfs_header_level(eb)); | |
1c24c3ce JB |
737 | ret = -EIO; |
738 | goto err; | |
739 | } | |
ce9adaa5 | 740 | |
85d4e461 CM |
741 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
742 | eb, found_level); | |
4008c04a | 743 | |
02873e43 | 744 | ret = csum_tree_block(fs_info, eb, 1); |
8bd98f0e | 745 | if (ret) |
a826d6dc | 746 | goto err; |
a826d6dc JB |
747 | |
748 | /* | |
749 | * If this is a leaf block and it is corrupt, set the corrupt bit so | |
750 | * that we don't try and read the other copies of this block, just | |
751 | * return -EIO. | |
752 | */ | |
753 | if (found_level == 0 && check_leaf(root, eb)) { | |
754 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); | |
755 | ret = -EIO; | |
756 | } | |
ce9adaa5 | 757 | |
053ab70f LB |
758 | if (found_level > 0 && check_node(root, eb)) |
759 | ret = -EIO; | |
760 | ||
0b32f4bb JB |
761 | if (!ret) |
762 | set_extent_buffer_uptodate(eb); | |
ce9adaa5 | 763 | err: |
79fb65a1 JB |
764 | if (reads_done && |
765 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) | |
fc2e901f | 766 | btree_readahead_hook(fs_info, eb, ret); |
4bb31e92 | 767 | |
53b381b3 DW |
768 | if (ret) { |
769 | /* | |
770 | * our io error hook is going to dec the io pages | |
771 | * again, we have to make sure it has something | |
772 | * to decrement | |
773 | */ | |
774 | atomic_inc(&eb->io_pages); | |
0b32f4bb | 775 | clear_extent_buffer_uptodate(eb); |
53b381b3 | 776 | } |
0b32f4bb | 777 | free_extent_buffer(eb); |
ce9adaa5 | 778 | out: |
f188591e | 779 | return ret; |
ce9adaa5 CM |
780 | } |
781 | ||
ea466794 | 782 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
4bb31e92 | 783 | { |
4bb31e92 | 784 | struct extent_buffer *eb; |
4bb31e92 | 785 | |
4f2de97a | 786 | eb = (struct extent_buffer *)page->private; |
656f30db | 787 | set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); |
5cf1ab56 | 788 | eb->read_mirror = failed_mirror; |
53b381b3 | 789 | atomic_dec(&eb->io_pages); |
ea466794 | 790 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
fc2e901f | 791 | btree_readahead_hook(eb->fs_info, eb, -EIO); |
4bb31e92 AJ |
792 | return -EIO; /* we fixed nothing */ |
793 | } | |
794 | ||
4246a0b6 | 795 | static void end_workqueue_bio(struct bio *bio) |
ce9adaa5 | 796 | { |
97eb6b69 | 797 | struct btrfs_end_io_wq *end_io_wq = bio->bi_private; |
ce9adaa5 | 798 | struct btrfs_fs_info *fs_info; |
9e0af237 LB |
799 | struct btrfs_workqueue *wq; |
800 | btrfs_work_func_t func; | |
ce9adaa5 | 801 | |
ce9adaa5 | 802 | fs_info = end_io_wq->info; |
4246a0b6 | 803 | end_io_wq->error = bio->bi_error; |
d20f7043 | 804 | |
37226b21 | 805 | if (bio_op(bio) == REQ_OP_WRITE) { |
9e0af237 LB |
806 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { |
807 | wq = fs_info->endio_meta_write_workers; | |
808 | func = btrfs_endio_meta_write_helper; | |
809 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { | |
810 | wq = fs_info->endio_freespace_worker; | |
811 | func = btrfs_freespace_write_helper; | |
812 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { | |
813 | wq = fs_info->endio_raid56_workers; | |
814 | func = btrfs_endio_raid56_helper; | |
815 | } else { | |
816 | wq = fs_info->endio_write_workers; | |
817 | func = btrfs_endio_write_helper; | |
818 | } | |
d20f7043 | 819 | } else { |
8b110e39 MX |
820 | if (unlikely(end_io_wq->metadata == |
821 | BTRFS_WQ_ENDIO_DIO_REPAIR)) { | |
822 | wq = fs_info->endio_repair_workers; | |
823 | func = btrfs_endio_repair_helper; | |
824 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { | |
9e0af237 LB |
825 | wq = fs_info->endio_raid56_workers; |
826 | func = btrfs_endio_raid56_helper; | |
827 | } else if (end_io_wq->metadata) { | |
828 | wq = fs_info->endio_meta_workers; | |
829 | func = btrfs_endio_meta_helper; | |
830 | } else { | |
831 | wq = fs_info->endio_workers; | |
832 | func = btrfs_endio_helper; | |
833 | } | |
d20f7043 | 834 | } |
9e0af237 LB |
835 | |
836 | btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); | |
837 | btrfs_queue_work(wq, &end_io_wq->work); | |
ce9adaa5 CM |
838 | } |
839 | ||
22c59948 | 840 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
bfebd8b5 | 841 | enum btrfs_wq_endio_type metadata) |
0b86a832 | 842 | { |
97eb6b69 | 843 | struct btrfs_end_io_wq *end_io_wq; |
8b110e39 | 844 | |
97eb6b69 | 845 | end_io_wq = kmem_cache_alloc(btrfs_end_io_wq_cache, GFP_NOFS); |
ce9adaa5 CM |
846 | if (!end_io_wq) |
847 | return -ENOMEM; | |
848 | ||
849 | end_io_wq->private = bio->bi_private; | |
850 | end_io_wq->end_io = bio->bi_end_io; | |
22c59948 | 851 | end_io_wq->info = info; |
ce9adaa5 CM |
852 | end_io_wq->error = 0; |
853 | end_io_wq->bio = bio; | |
22c59948 | 854 | end_io_wq->metadata = metadata; |
ce9adaa5 CM |
855 | |
856 | bio->bi_private = end_io_wq; | |
857 | bio->bi_end_io = end_workqueue_bio; | |
22c59948 CM |
858 | return 0; |
859 | } | |
860 | ||
b64a2851 | 861 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
0986fe9e | 862 | { |
4854ddd0 | 863 | unsigned long limit = min_t(unsigned long, |
5cdc7ad3 | 864 | info->thread_pool_size, |
4854ddd0 CM |
865 | info->fs_devices->open_devices); |
866 | return 256 * limit; | |
867 | } | |
0986fe9e | 868 | |
4a69a410 CM |
869 | static void run_one_async_start(struct btrfs_work *work) |
870 | { | |
4a69a410 | 871 | struct async_submit_bio *async; |
79787eaa | 872 | int ret; |
4a69a410 CM |
873 | |
874 | async = container_of(work, struct async_submit_bio, work); | |
81a75f67 | 875 | ret = async->submit_bio_start(async->inode, async->bio, |
79787eaa JM |
876 | async->mirror_num, async->bio_flags, |
877 | async->bio_offset); | |
878 | if (ret) | |
879 | async->error = ret; | |
4a69a410 CM |
880 | } |
881 | ||
882 | static void run_one_async_done(struct btrfs_work *work) | |
8b712842 CM |
883 | { |
884 | struct btrfs_fs_info *fs_info; | |
885 | struct async_submit_bio *async; | |
4854ddd0 | 886 | int limit; |
8b712842 CM |
887 | |
888 | async = container_of(work, struct async_submit_bio, work); | |
889 | fs_info = BTRFS_I(async->inode)->root->fs_info; | |
4854ddd0 | 890 | |
b64a2851 | 891 | limit = btrfs_async_submit_limit(fs_info); |
4854ddd0 CM |
892 | limit = limit * 2 / 3; |
893 | ||
ee863954 DS |
894 | /* |
895 | * atomic_dec_return implies a barrier for waitqueue_active | |
896 | */ | |
66657b31 | 897 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
b64a2851 | 898 | waitqueue_active(&fs_info->async_submit_wait)) |
4854ddd0 CM |
899 | wake_up(&fs_info->async_submit_wait); |
900 | ||
bb7ab3b9 | 901 | /* If an error occurred we just want to clean up the bio and move on */ |
79787eaa | 902 | if (async->error) { |
4246a0b6 CH |
903 | async->bio->bi_error = async->error; |
904 | bio_endio(async->bio); | |
79787eaa JM |
905 | return; |
906 | } | |
907 | ||
81a75f67 MC |
908 | async->submit_bio_done(async->inode, async->bio, async->mirror_num, |
909 | async->bio_flags, async->bio_offset); | |
4a69a410 CM |
910 | } |
911 | ||
912 | static void run_one_async_free(struct btrfs_work *work) | |
913 | { | |
914 | struct async_submit_bio *async; | |
915 | ||
916 | async = container_of(work, struct async_submit_bio, work); | |
8b712842 CM |
917 | kfree(async); |
918 | } | |
919 | ||
44b8bd7e | 920 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
81a75f67 | 921 | struct bio *bio, int mirror_num, |
c8b97818 | 922 | unsigned long bio_flags, |
eaf25d93 | 923 | u64 bio_offset, |
4a69a410 CM |
924 | extent_submit_bio_hook_t *submit_bio_start, |
925 | extent_submit_bio_hook_t *submit_bio_done) | |
44b8bd7e CM |
926 | { |
927 | struct async_submit_bio *async; | |
928 | ||
929 | async = kmalloc(sizeof(*async), GFP_NOFS); | |
930 | if (!async) | |
931 | return -ENOMEM; | |
932 | ||
933 | async->inode = inode; | |
44b8bd7e CM |
934 | async->bio = bio; |
935 | async->mirror_num = mirror_num; | |
4a69a410 CM |
936 | async->submit_bio_start = submit_bio_start; |
937 | async->submit_bio_done = submit_bio_done; | |
938 | ||
9e0af237 | 939 | btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, |
5cdc7ad3 | 940 | run_one_async_done, run_one_async_free); |
4a69a410 | 941 | |
c8b97818 | 942 | async->bio_flags = bio_flags; |
eaf25d93 | 943 | async->bio_offset = bio_offset; |
8c8bee1d | 944 | |
79787eaa JM |
945 | async->error = 0; |
946 | ||
cb03c743 | 947 | atomic_inc(&fs_info->nr_async_submits); |
d313d7a3 | 948 | |
67f055c7 | 949 | if (op_is_sync(bio->bi_opf)) |
5cdc7ad3 | 950 | btrfs_set_work_high_priority(&async->work); |
d313d7a3 | 951 | |
5cdc7ad3 | 952 | btrfs_queue_work(fs_info->workers, &async->work); |
9473f16c | 953 | |
d397712b | 954 | while (atomic_read(&fs_info->async_submit_draining) && |
771ed689 CM |
955 | atomic_read(&fs_info->nr_async_submits)) { |
956 | wait_event(fs_info->async_submit_wait, | |
957 | (atomic_read(&fs_info->nr_async_submits) == 0)); | |
958 | } | |
959 | ||
44b8bd7e CM |
960 | return 0; |
961 | } | |
962 | ||
ce3ed71a CM |
963 | static int btree_csum_one_bio(struct bio *bio) |
964 | { | |
2c30c71b | 965 | struct bio_vec *bvec; |
ce3ed71a | 966 | struct btrfs_root *root; |
2c30c71b | 967 | int i, ret = 0; |
ce3ed71a | 968 | |
2c30c71b | 969 | bio_for_each_segment_all(bvec, bio, i) { |
ce3ed71a | 970 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
01d58472 | 971 | ret = csum_dirty_buffer(root->fs_info, bvec->bv_page); |
79787eaa JM |
972 | if (ret) |
973 | break; | |
ce3ed71a | 974 | } |
2c30c71b | 975 | |
79787eaa | 976 | return ret; |
ce3ed71a CM |
977 | } |
978 | ||
81a75f67 MC |
979 | static int __btree_submit_bio_start(struct inode *inode, struct bio *bio, |
980 | int mirror_num, unsigned long bio_flags, | |
eaf25d93 | 981 | u64 bio_offset) |
22c59948 | 982 | { |
8b712842 CM |
983 | /* |
984 | * when we're called for a write, we're already in the async | |
5443be45 | 985 | * submission context. Just jump into btrfs_map_bio |
8b712842 | 986 | */ |
79787eaa | 987 | return btree_csum_one_bio(bio); |
4a69a410 | 988 | } |
22c59948 | 989 | |
81a75f67 | 990 | static int __btree_submit_bio_done(struct inode *inode, struct bio *bio, |
eaf25d93 CM |
991 | int mirror_num, unsigned long bio_flags, |
992 | u64 bio_offset) | |
4a69a410 | 993 | { |
61891923 SB |
994 | int ret; |
995 | ||
8b712842 | 996 | /* |
4a69a410 CM |
997 | * when we're called for a write, we're already in the async |
998 | * submission context. Just jump into btrfs_map_bio | |
8b712842 | 999 | */ |
2ff7e61e | 1000 | ret = btrfs_map_bio(btrfs_sb(inode->i_sb), bio, mirror_num, 1); |
4246a0b6 CH |
1001 | if (ret) { |
1002 | bio->bi_error = ret; | |
1003 | bio_endio(bio); | |
1004 | } | |
61891923 | 1005 | return ret; |
0b86a832 CM |
1006 | } |
1007 | ||
e27f6265 | 1008 | static int check_async_write(unsigned long bio_flags) |
de0022b9 JB |
1009 | { |
1010 | if (bio_flags & EXTENT_BIO_TREE_LOG) | |
1011 | return 0; | |
1012 | #ifdef CONFIG_X86 | |
bc696ca0 | 1013 | if (static_cpu_has(X86_FEATURE_XMM4_2)) |
de0022b9 JB |
1014 | return 0; |
1015 | #endif | |
1016 | return 1; | |
1017 | } | |
1018 | ||
81a75f67 | 1019 | static int btree_submit_bio_hook(struct inode *inode, struct bio *bio, |
eaf25d93 CM |
1020 | int mirror_num, unsigned long bio_flags, |
1021 | u64 bio_offset) | |
44b8bd7e | 1022 | { |
0b246afa | 1023 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
e27f6265 | 1024 | int async = check_async_write(bio_flags); |
cad321ad CM |
1025 | int ret; |
1026 | ||
37226b21 | 1027 | if (bio_op(bio) != REQ_OP_WRITE) { |
4a69a410 CM |
1028 | /* |
1029 | * called for a read, do the setup so that checksum validation | |
1030 | * can happen in the async kernel threads | |
1031 | */ | |
0b246afa JM |
1032 | ret = btrfs_bio_wq_end_io(fs_info, bio, |
1033 | BTRFS_WQ_ENDIO_METADATA); | |
1d4284bd | 1034 | if (ret) |
61891923 | 1035 | goto out_w_error; |
2ff7e61e | 1036 | ret = btrfs_map_bio(fs_info, bio, mirror_num, 0); |
de0022b9 JB |
1037 | } else if (!async) { |
1038 | ret = btree_csum_one_bio(bio); | |
1039 | if (ret) | |
61891923 | 1040 | goto out_w_error; |
2ff7e61e | 1041 | ret = btrfs_map_bio(fs_info, bio, mirror_num, 0); |
61891923 SB |
1042 | } else { |
1043 | /* | |
1044 | * kthread helpers are used to submit writes so that | |
1045 | * checksumming can happen in parallel across all CPUs | |
1046 | */ | |
0b246afa | 1047 | ret = btrfs_wq_submit_bio(fs_info, inode, bio, mirror_num, 0, |
61891923 SB |
1048 | bio_offset, |
1049 | __btree_submit_bio_start, | |
1050 | __btree_submit_bio_done); | |
44b8bd7e | 1051 | } |
d313d7a3 | 1052 | |
4246a0b6 CH |
1053 | if (ret) |
1054 | goto out_w_error; | |
1055 | return 0; | |
1056 | ||
61891923 | 1057 | out_w_error: |
4246a0b6 CH |
1058 | bio->bi_error = ret; |
1059 | bio_endio(bio); | |
61891923 | 1060 | return ret; |
44b8bd7e CM |
1061 | } |
1062 | ||
3dd1462e | 1063 | #ifdef CONFIG_MIGRATION |
784b4e29 | 1064 | static int btree_migratepage(struct address_space *mapping, |
a6bc32b8 MG |
1065 | struct page *newpage, struct page *page, |
1066 | enum migrate_mode mode) | |
784b4e29 CM |
1067 | { |
1068 | /* | |
1069 | * we can't safely write a btree page from here, | |
1070 | * we haven't done the locking hook | |
1071 | */ | |
1072 | if (PageDirty(page)) | |
1073 | return -EAGAIN; | |
1074 | /* | |
1075 | * Buffers may be managed in a filesystem specific way. | |
1076 | * We must have no buffers or drop them. | |
1077 | */ | |
1078 | if (page_has_private(page) && | |
1079 | !try_to_release_page(page, GFP_KERNEL)) | |
1080 | return -EAGAIN; | |
a6bc32b8 | 1081 | return migrate_page(mapping, newpage, page, mode); |
784b4e29 | 1082 | } |
3dd1462e | 1083 | #endif |
784b4e29 | 1084 | |
0da5468f CM |
1085 | |
1086 | static int btree_writepages(struct address_space *mapping, | |
1087 | struct writeback_control *wbc) | |
1088 | { | |
e2d84521 MX |
1089 | struct btrfs_fs_info *fs_info; |
1090 | int ret; | |
1091 | ||
d8d5f3e1 | 1092 | if (wbc->sync_mode == WB_SYNC_NONE) { |
448d640b CM |
1093 | |
1094 | if (wbc->for_kupdate) | |
1095 | return 0; | |
1096 | ||
e2d84521 | 1097 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
b9473439 | 1098 | /* this is a bit racy, but that's ok */ |
e2d84521 MX |
1099 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
1100 | BTRFS_DIRTY_METADATA_THRESH); | |
1101 | if (ret < 0) | |
793955bc | 1102 | return 0; |
793955bc | 1103 | } |
0b32f4bb | 1104 | return btree_write_cache_pages(mapping, wbc); |
0da5468f CM |
1105 | } |
1106 | ||
b2950863 | 1107 | static int btree_readpage(struct file *file, struct page *page) |
5f39d397 | 1108 | { |
d1310b2e CM |
1109 | struct extent_io_tree *tree; |
1110 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
8ddc7d9c | 1111 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
5f39d397 | 1112 | } |
22b0ebda | 1113 | |
70dec807 | 1114 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
5f39d397 | 1115 | { |
98509cfc | 1116 | if (PageWriteback(page) || PageDirty(page)) |
d397712b | 1117 | return 0; |
0c4e538b | 1118 | |
f7a52a40 | 1119 | return try_release_extent_buffer(page); |
d98237b3 CM |
1120 | } |
1121 | ||
d47992f8 LC |
1122 | static void btree_invalidatepage(struct page *page, unsigned int offset, |
1123 | unsigned int length) | |
d98237b3 | 1124 | { |
d1310b2e CM |
1125 | struct extent_io_tree *tree; |
1126 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
1127 | extent_invalidatepage(tree, page, offset); |
1128 | btree_releasepage(page, GFP_NOFS); | |
9ad6b7bc | 1129 | if (PagePrivate(page)) { |
efe120a0 FH |
1130 | btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, |
1131 | "page private not zero on page %llu", | |
1132 | (unsigned long long)page_offset(page)); | |
9ad6b7bc CM |
1133 | ClearPagePrivate(page); |
1134 | set_page_private(page, 0); | |
09cbfeaf | 1135 | put_page(page); |
9ad6b7bc | 1136 | } |
d98237b3 CM |
1137 | } |
1138 | ||
0b32f4bb JB |
1139 | static int btree_set_page_dirty(struct page *page) |
1140 | { | |
bb146eb2 | 1141 | #ifdef DEBUG |
0b32f4bb JB |
1142 | struct extent_buffer *eb; |
1143 | ||
1144 | BUG_ON(!PagePrivate(page)); | |
1145 | eb = (struct extent_buffer *)page->private; | |
1146 | BUG_ON(!eb); | |
1147 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); | |
1148 | BUG_ON(!atomic_read(&eb->refs)); | |
1149 | btrfs_assert_tree_locked(eb); | |
bb146eb2 | 1150 | #endif |
0b32f4bb JB |
1151 | return __set_page_dirty_nobuffers(page); |
1152 | } | |
1153 | ||
7f09410b | 1154 | static const struct address_space_operations btree_aops = { |
d98237b3 | 1155 | .readpage = btree_readpage, |
0da5468f | 1156 | .writepages = btree_writepages, |
5f39d397 CM |
1157 | .releasepage = btree_releasepage, |
1158 | .invalidatepage = btree_invalidatepage, | |
5a92bc88 | 1159 | #ifdef CONFIG_MIGRATION |
784b4e29 | 1160 | .migratepage = btree_migratepage, |
5a92bc88 | 1161 | #endif |
0b32f4bb | 1162 | .set_page_dirty = btree_set_page_dirty, |
d98237b3 CM |
1163 | }; |
1164 | ||
2ff7e61e | 1165 | void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr) |
090d1875 | 1166 | { |
5f39d397 | 1167 | struct extent_buffer *buf = NULL; |
2ff7e61e | 1168 | struct inode *btree_inode = fs_info->btree_inode; |
090d1875 | 1169 | |
2ff7e61e | 1170 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 | 1171 | if (IS_ERR(buf)) |
6197d86e | 1172 | return; |
d1310b2e | 1173 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
8436ea91 | 1174 | buf, WAIT_NONE, btree_get_extent, 0); |
5f39d397 | 1175 | free_extent_buffer(buf); |
090d1875 CM |
1176 | } |
1177 | ||
2ff7e61e | 1178 | int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr, |
ab0fff03 AJ |
1179 | int mirror_num, struct extent_buffer **eb) |
1180 | { | |
1181 | struct extent_buffer *buf = NULL; | |
2ff7e61e | 1182 | struct inode *btree_inode = fs_info->btree_inode; |
ab0fff03 AJ |
1183 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; |
1184 | int ret; | |
1185 | ||
2ff7e61e | 1186 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 | 1187 | if (IS_ERR(buf)) |
ab0fff03 AJ |
1188 | return 0; |
1189 | ||
1190 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); | |
1191 | ||
8436ea91 | 1192 | ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK, |
ab0fff03 AJ |
1193 | btree_get_extent, mirror_num); |
1194 | if (ret) { | |
1195 | free_extent_buffer(buf); | |
1196 | return ret; | |
1197 | } | |
1198 | ||
1199 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { | |
1200 | free_extent_buffer(buf); | |
1201 | return -EIO; | |
0b32f4bb | 1202 | } else if (extent_buffer_uptodate(buf)) { |
ab0fff03 AJ |
1203 | *eb = buf; |
1204 | } else { | |
1205 | free_extent_buffer(buf); | |
1206 | } | |
1207 | return 0; | |
1208 | } | |
1209 | ||
2ff7e61e JM |
1210 | struct extent_buffer *btrfs_find_create_tree_block( |
1211 | struct btrfs_fs_info *fs_info, | |
1212 | u64 bytenr) | |
0999df54 | 1213 | { |
0b246afa JM |
1214 | if (btrfs_is_testing(fs_info)) |
1215 | return alloc_test_extent_buffer(fs_info, bytenr); | |
1216 | return alloc_extent_buffer(fs_info, bytenr); | |
0999df54 CM |
1217 | } |
1218 | ||
1219 | ||
e02119d5 CM |
1220 | int btrfs_write_tree_block(struct extent_buffer *buf) |
1221 | { | |
727011e0 | 1222 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
8aa38c31 | 1223 | buf->start + buf->len - 1); |
e02119d5 CM |
1224 | } |
1225 | ||
1226 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) | |
1227 | { | |
727011e0 | 1228 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
8aa38c31 | 1229 | buf->start, buf->start + buf->len - 1); |
e02119d5 CM |
1230 | } |
1231 | ||
2ff7e61e | 1232 | struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
ce86cd59 | 1233 | u64 parent_transid) |
0999df54 CM |
1234 | { |
1235 | struct extent_buffer *buf = NULL; | |
0999df54 CM |
1236 | int ret; |
1237 | ||
2ff7e61e | 1238 | buf = btrfs_find_create_tree_block(fs_info, bytenr); |
c871b0f2 LB |
1239 | if (IS_ERR(buf)) |
1240 | return buf; | |
0999df54 | 1241 | |
2ff7e61e | 1242 | ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid); |
0f0fe8f7 FDBM |
1243 | if (ret) { |
1244 | free_extent_buffer(buf); | |
64c043de | 1245 | return ERR_PTR(ret); |
0f0fe8f7 | 1246 | } |
5f39d397 | 1247 | return buf; |
ce9adaa5 | 1248 | |
eb60ceac CM |
1249 | } |
1250 | ||
01d58472 DD |
1251 | void clean_tree_block(struct btrfs_trans_handle *trans, |
1252 | struct btrfs_fs_info *fs_info, | |
d5c13f92 | 1253 | struct extent_buffer *buf) |
ed2ff2cb | 1254 | { |
55c69072 | 1255 | if (btrfs_header_generation(buf) == |
e2d84521 | 1256 | fs_info->running_transaction->transid) { |
b9447ef8 | 1257 | btrfs_assert_tree_locked(buf); |
b4ce94de | 1258 | |
b9473439 | 1259 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
e2d84521 MX |
1260 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
1261 | -buf->len, | |
1262 | fs_info->dirty_metadata_batch); | |
ed7b63eb JB |
1263 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
1264 | btrfs_set_lock_blocking(buf); | |
1265 | clear_extent_buffer_dirty(buf); | |
1266 | } | |
925baedd | 1267 | } |
5f39d397 CM |
1268 | } |
1269 | ||
8257b2dc MX |
1270 | static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) |
1271 | { | |
1272 | struct btrfs_subvolume_writers *writers; | |
1273 | int ret; | |
1274 | ||
1275 | writers = kmalloc(sizeof(*writers), GFP_NOFS); | |
1276 | if (!writers) | |
1277 | return ERR_PTR(-ENOMEM); | |
1278 | ||
908c7f19 | 1279 | ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL); |
8257b2dc MX |
1280 | if (ret < 0) { |
1281 | kfree(writers); | |
1282 | return ERR_PTR(ret); | |
1283 | } | |
1284 | ||
1285 | init_waitqueue_head(&writers->wait); | |
1286 | return writers; | |
1287 | } | |
1288 | ||
1289 | static void | |
1290 | btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) | |
1291 | { | |
1292 | percpu_counter_destroy(&writers->counter); | |
1293 | kfree(writers); | |
1294 | } | |
1295 | ||
da17066c | 1296 | static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, |
143bede5 | 1297 | u64 objectid) |
d97e63b6 | 1298 | { |
7c0260ee | 1299 | bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); |
cfaa7295 | 1300 | root->node = NULL; |
a28ec197 | 1301 | root->commit_root = NULL; |
27cdeb70 | 1302 | root->state = 0; |
d68fc57b | 1303 | root->orphan_cleanup_state = 0; |
0b86a832 | 1304 | |
0f7d52f4 CM |
1305 | root->objectid = objectid; |
1306 | root->last_trans = 0; | |
13a8a7c8 | 1307 | root->highest_objectid = 0; |
eb73c1b7 | 1308 | root->nr_delalloc_inodes = 0; |
199c2a9c | 1309 | root->nr_ordered_extents = 0; |
58176a96 | 1310 | root->name = NULL; |
6bef4d31 | 1311 | root->inode_tree = RB_ROOT; |
16cdcec7 | 1312 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
f0486c68 | 1313 | root->block_rsv = NULL; |
d68fc57b | 1314 | root->orphan_block_rsv = NULL; |
0b86a832 CM |
1315 | |
1316 | INIT_LIST_HEAD(&root->dirty_list); | |
5d4f98a2 | 1317 | INIT_LIST_HEAD(&root->root_list); |
eb73c1b7 MX |
1318 | INIT_LIST_HEAD(&root->delalloc_inodes); |
1319 | INIT_LIST_HEAD(&root->delalloc_root); | |
199c2a9c MX |
1320 | INIT_LIST_HEAD(&root->ordered_extents); |
1321 | INIT_LIST_HEAD(&root->ordered_root); | |
2ab28f32 JB |
1322 | INIT_LIST_HEAD(&root->logged_list[0]); |
1323 | INIT_LIST_HEAD(&root->logged_list[1]); | |
d68fc57b | 1324 | spin_lock_init(&root->orphan_lock); |
5d4f98a2 | 1325 | spin_lock_init(&root->inode_lock); |
eb73c1b7 | 1326 | spin_lock_init(&root->delalloc_lock); |
199c2a9c | 1327 | spin_lock_init(&root->ordered_extent_lock); |
f0486c68 | 1328 | spin_lock_init(&root->accounting_lock); |
2ab28f32 JB |
1329 | spin_lock_init(&root->log_extents_lock[0]); |
1330 | spin_lock_init(&root->log_extents_lock[1]); | |
a2135011 | 1331 | mutex_init(&root->objectid_mutex); |
e02119d5 | 1332 | mutex_init(&root->log_mutex); |
31f3d255 | 1333 | mutex_init(&root->ordered_extent_mutex); |
573bfb72 | 1334 | mutex_init(&root->delalloc_mutex); |
7237f183 YZ |
1335 | init_waitqueue_head(&root->log_writer_wait); |
1336 | init_waitqueue_head(&root->log_commit_wait[0]); | |
1337 | init_waitqueue_head(&root->log_commit_wait[1]); | |
8b050d35 MX |
1338 | INIT_LIST_HEAD(&root->log_ctxs[0]); |
1339 | INIT_LIST_HEAD(&root->log_ctxs[1]); | |
7237f183 YZ |
1340 | atomic_set(&root->log_commit[0], 0); |
1341 | atomic_set(&root->log_commit[1], 0); | |
1342 | atomic_set(&root->log_writers, 0); | |
2ecb7923 | 1343 | atomic_set(&root->log_batch, 0); |
8a35d95f | 1344 | atomic_set(&root->orphan_inodes, 0); |
b0feb9d9 | 1345 | atomic_set(&root->refs, 1); |
8257b2dc | 1346 | atomic_set(&root->will_be_snapshoted, 0); |
55eeaf05 | 1347 | atomic_set(&root->qgroup_meta_rsv, 0); |
7237f183 | 1348 | root->log_transid = 0; |
d1433deb | 1349 | root->log_transid_committed = -1; |
257c62e1 | 1350 | root->last_log_commit = 0; |
7c0260ee | 1351 | if (!dummy) |
06ea65a3 JB |
1352 | extent_io_tree_init(&root->dirty_log_pages, |
1353 | fs_info->btree_inode->i_mapping); | |
017e5369 | 1354 | |
3768f368 CM |
1355 | memset(&root->root_key, 0, sizeof(root->root_key)); |
1356 | memset(&root->root_item, 0, sizeof(root->root_item)); | |
6702ed49 | 1357 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
7c0260ee | 1358 | if (!dummy) |
06ea65a3 JB |
1359 | root->defrag_trans_start = fs_info->generation; |
1360 | else | |
1361 | root->defrag_trans_start = 0; | |
4d775673 | 1362 | root->root_key.objectid = objectid; |
0ee5dc67 | 1363 | root->anon_dev = 0; |
8ea05e3a | 1364 | |
5f3ab90a | 1365 | spin_lock_init(&root->root_item_lock); |
3768f368 CM |
1366 | } |
1367 | ||
74e4d827 DS |
1368 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info, |
1369 | gfp_t flags) | |
6f07e42e | 1370 | { |
74e4d827 | 1371 | struct btrfs_root *root = kzalloc(sizeof(*root), flags); |
6f07e42e AV |
1372 | if (root) |
1373 | root->fs_info = fs_info; | |
1374 | return root; | |
1375 | } | |
1376 | ||
06ea65a3 JB |
1377 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
1378 | /* Should only be used by the testing infrastructure */ | |
da17066c | 1379 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info) |
06ea65a3 JB |
1380 | { |
1381 | struct btrfs_root *root; | |
1382 | ||
7c0260ee JM |
1383 | if (!fs_info) |
1384 | return ERR_PTR(-EINVAL); | |
1385 | ||
1386 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); | |
06ea65a3 JB |
1387 | if (!root) |
1388 | return ERR_PTR(-ENOMEM); | |
da17066c | 1389 | |
b9ef22de | 1390 | /* We don't use the stripesize in selftest, set it as sectorsize */ |
da17066c | 1391 | __setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID); |
faa2dbf0 | 1392 | root->alloc_bytenr = 0; |
06ea65a3 JB |
1393 | |
1394 | return root; | |
1395 | } | |
1396 | #endif | |
1397 | ||
20897f5c AJ |
1398 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
1399 | struct btrfs_fs_info *fs_info, | |
1400 | u64 objectid) | |
1401 | { | |
1402 | struct extent_buffer *leaf; | |
1403 | struct btrfs_root *tree_root = fs_info->tree_root; | |
1404 | struct btrfs_root *root; | |
1405 | struct btrfs_key key; | |
1406 | int ret = 0; | |
6463fe58 | 1407 | uuid_le uuid; |
20897f5c | 1408 | |
74e4d827 | 1409 | root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
20897f5c AJ |
1410 | if (!root) |
1411 | return ERR_PTR(-ENOMEM); | |
1412 | ||
da17066c | 1413 | __setup_root(root, fs_info, objectid); |
20897f5c AJ |
1414 | root->root_key.objectid = objectid; |
1415 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1416 | root->root_key.offset = 0; | |
1417 | ||
4d75f8a9 | 1418 | leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0); |
20897f5c AJ |
1419 | if (IS_ERR(leaf)) { |
1420 | ret = PTR_ERR(leaf); | |
1dd05682 | 1421 | leaf = NULL; |
20897f5c AJ |
1422 | goto fail; |
1423 | } | |
1424 | ||
b159fa28 | 1425 | memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header)); |
20897f5c AJ |
1426 | btrfs_set_header_bytenr(leaf, leaf->start); |
1427 | btrfs_set_header_generation(leaf, trans->transid); | |
1428 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1429 | btrfs_set_header_owner(leaf, objectid); | |
1430 | root->node = leaf; | |
1431 | ||
d24ee97b DS |
1432 | write_extent_buffer_fsid(leaf, fs_info->fsid); |
1433 | write_extent_buffer_chunk_tree_uuid(leaf, fs_info->chunk_tree_uuid); | |
20897f5c AJ |
1434 | btrfs_mark_buffer_dirty(leaf); |
1435 | ||
1436 | root->commit_root = btrfs_root_node(root); | |
27cdeb70 | 1437 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
20897f5c AJ |
1438 | |
1439 | root->root_item.flags = 0; | |
1440 | root->root_item.byte_limit = 0; | |
1441 | btrfs_set_root_bytenr(&root->root_item, leaf->start); | |
1442 | btrfs_set_root_generation(&root->root_item, trans->transid); | |
1443 | btrfs_set_root_level(&root->root_item, 0); | |
1444 | btrfs_set_root_refs(&root->root_item, 1); | |
1445 | btrfs_set_root_used(&root->root_item, leaf->len); | |
1446 | btrfs_set_root_last_snapshot(&root->root_item, 0); | |
1447 | btrfs_set_root_dirid(&root->root_item, 0); | |
6463fe58 SB |
1448 | uuid_le_gen(&uuid); |
1449 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); | |
20897f5c AJ |
1450 | root->root_item.drop_level = 0; |
1451 | ||
1452 | key.objectid = objectid; | |
1453 | key.type = BTRFS_ROOT_ITEM_KEY; | |
1454 | key.offset = 0; | |
1455 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); | |
1456 | if (ret) | |
1457 | goto fail; | |
1458 | ||
1459 | btrfs_tree_unlock(leaf); | |
1460 | ||
1dd05682 TI |
1461 | return root; |
1462 | ||
20897f5c | 1463 | fail: |
1dd05682 TI |
1464 | if (leaf) { |
1465 | btrfs_tree_unlock(leaf); | |
59885b39 | 1466 | free_extent_buffer(root->commit_root); |
1dd05682 TI |
1467 | free_extent_buffer(leaf); |
1468 | } | |
1469 | kfree(root); | |
20897f5c | 1470 | |
1dd05682 | 1471 | return ERR_PTR(ret); |
20897f5c AJ |
1472 | } |
1473 | ||
7237f183 YZ |
1474 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
1475 | struct btrfs_fs_info *fs_info) | |
0f7d52f4 CM |
1476 | { |
1477 | struct btrfs_root *root; | |
7237f183 | 1478 | struct extent_buffer *leaf; |
e02119d5 | 1479 | |
74e4d827 | 1480 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
e02119d5 | 1481 | if (!root) |
7237f183 | 1482 | return ERR_PTR(-ENOMEM); |
e02119d5 | 1483 | |
da17066c | 1484 | __setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
e02119d5 CM |
1485 | |
1486 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; | |
1487 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1488 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; | |
27cdeb70 | 1489 | |
7237f183 | 1490 | /* |
27cdeb70 MX |
1491 | * DON'T set REF_COWS for log trees |
1492 | * | |
7237f183 YZ |
1493 | * log trees do not get reference counted because they go away |
1494 | * before a real commit is actually done. They do store pointers | |
1495 | * to file data extents, and those reference counts still get | |
1496 | * updated (along with back refs to the log tree). | |
1497 | */ | |
e02119d5 | 1498 | |
4d75f8a9 DS |
1499 | leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, |
1500 | NULL, 0, 0, 0); | |
7237f183 YZ |
1501 | if (IS_ERR(leaf)) { |
1502 | kfree(root); | |
1503 | return ERR_CAST(leaf); | |
1504 | } | |
e02119d5 | 1505 | |
b159fa28 | 1506 | memzero_extent_buffer(leaf, 0, sizeof(struct btrfs_header)); |
5d4f98a2 YZ |
1507 | btrfs_set_header_bytenr(leaf, leaf->start); |
1508 | btrfs_set_header_generation(leaf, trans->transid); | |
1509 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1510 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); | |
7237f183 | 1511 | root->node = leaf; |
e02119d5 | 1512 | |
0b246afa | 1513 | write_extent_buffer_fsid(root->node, fs_info->fsid); |
e02119d5 CM |
1514 | btrfs_mark_buffer_dirty(root->node); |
1515 | btrfs_tree_unlock(root->node); | |
7237f183 YZ |
1516 | return root; |
1517 | } | |
1518 | ||
1519 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
1520 | struct btrfs_fs_info *fs_info) | |
1521 | { | |
1522 | struct btrfs_root *log_root; | |
1523 | ||
1524 | log_root = alloc_log_tree(trans, fs_info); | |
1525 | if (IS_ERR(log_root)) | |
1526 | return PTR_ERR(log_root); | |
1527 | WARN_ON(fs_info->log_root_tree); | |
1528 | fs_info->log_root_tree = log_root; | |
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
1533 | struct btrfs_root *root) | |
1534 | { | |
0b246afa | 1535 | struct btrfs_fs_info *fs_info = root->fs_info; |
7237f183 YZ |
1536 | struct btrfs_root *log_root; |
1537 | struct btrfs_inode_item *inode_item; | |
1538 | ||
0b246afa | 1539 | log_root = alloc_log_tree(trans, fs_info); |
7237f183 YZ |
1540 | if (IS_ERR(log_root)) |
1541 | return PTR_ERR(log_root); | |
1542 | ||
1543 | log_root->last_trans = trans->transid; | |
1544 | log_root->root_key.offset = root->root_key.objectid; | |
1545 | ||
1546 | inode_item = &log_root->root_item.inode; | |
3cae210f QW |
1547 | btrfs_set_stack_inode_generation(inode_item, 1); |
1548 | btrfs_set_stack_inode_size(inode_item, 3); | |
1549 | btrfs_set_stack_inode_nlink(inode_item, 1); | |
da17066c | 1550 | btrfs_set_stack_inode_nbytes(inode_item, |
0b246afa | 1551 | fs_info->nodesize); |
3cae210f | 1552 | btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); |
7237f183 | 1553 | |
5d4f98a2 | 1554 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
7237f183 YZ |
1555 | |
1556 | WARN_ON(root->log_root); | |
1557 | root->log_root = log_root; | |
1558 | root->log_transid = 0; | |
d1433deb | 1559 | root->log_transid_committed = -1; |
257c62e1 | 1560 | root->last_log_commit = 0; |
e02119d5 CM |
1561 | return 0; |
1562 | } | |
1563 | ||
35a3621b SB |
1564 | static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
1565 | struct btrfs_key *key) | |
e02119d5 CM |
1566 | { |
1567 | struct btrfs_root *root; | |
1568 | struct btrfs_fs_info *fs_info = tree_root->fs_info; | |
0f7d52f4 | 1569 | struct btrfs_path *path; |
84234f3a | 1570 | u64 generation; |
cb517eab | 1571 | int ret; |
0f7d52f4 | 1572 | |
cb517eab MX |
1573 | path = btrfs_alloc_path(); |
1574 | if (!path) | |
0f7d52f4 | 1575 | return ERR_PTR(-ENOMEM); |
cb517eab | 1576 | |
74e4d827 | 1577 | root = btrfs_alloc_root(fs_info, GFP_NOFS); |
cb517eab MX |
1578 | if (!root) { |
1579 | ret = -ENOMEM; | |
1580 | goto alloc_fail; | |
0f7d52f4 CM |
1581 | } |
1582 | ||
da17066c | 1583 | __setup_root(root, fs_info, key->objectid); |
0f7d52f4 | 1584 | |
cb517eab MX |
1585 | ret = btrfs_find_root(tree_root, key, path, |
1586 | &root->root_item, &root->root_key); | |
0f7d52f4 | 1587 | if (ret) { |
13a8a7c8 YZ |
1588 | if (ret > 0) |
1589 | ret = -ENOENT; | |
cb517eab | 1590 | goto find_fail; |
0f7d52f4 | 1591 | } |
13a8a7c8 | 1592 | |
84234f3a | 1593 | generation = btrfs_root_generation(&root->root_item); |
2ff7e61e JM |
1594 | root->node = read_tree_block(fs_info, |
1595 | btrfs_root_bytenr(&root->root_item), | |
ce86cd59 | 1596 | generation); |
64c043de LB |
1597 | if (IS_ERR(root->node)) { |
1598 | ret = PTR_ERR(root->node); | |
cb517eab MX |
1599 | goto find_fail; |
1600 | } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { | |
1601 | ret = -EIO; | |
64c043de LB |
1602 | free_extent_buffer(root->node); |
1603 | goto find_fail; | |
416bc658 | 1604 | } |
5d4f98a2 | 1605 | root->commit_root = btrfs_root_node(root); |
13a8a7c8 | 1606 | out: |
cb517eab MX |
1607 | btrfs_free_path(path); |
1608 | return root; | |
1609 | ||
cb517eab MX |
1610 | find_fail: |
1611 | kfree(root); | |
1612 | alloc_fail: | |
1613 | root = ERR_PTR(ret); | |
1614 | goto out; | |
1615 | } | |
1616 | ||
1617 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, | |
1618 | struct btrfs_key *location) | |
1619 | { | |
1620 | struct btrfs_root *root; | |
1621 | ||
1622 | root = btrfs_read_tree_root(tree_root, location); | |
1623 | if (IS_ERR(root)) | |
1624 | return root; | |
1625 | ||
1626 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { | |
27cdeb70 | 1627 | set_bit(BTRFS_ROOT_REF_COWS, &root->state); |
08fe4db1 LZ |
1628 | btrfs_check_and_init_root_item(&root->root_item); |
1629 | } | |
13a8a7c8 | 1630 | |
5eda7b5e CM |
1631 | return root; |
1632 | } | |
1633 | ||
cb517eab MX |
1634 | int btrfs_init_fs_root(struct btrfs_root *root) |
1635 | { | |
1636 | int ret; | |
8257b2dc | 1637 | struct btrfs_subvolume_writers *writers; |
cb517eab MX |
1638 | |
1639 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); | |
1640 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), | |
1641 | GFP_NOFS); | |
1642 | if (!root->free_ino_pinned || !root->free_ino_ctl) { | |
1643 | ret = -ENOMEM; | |
1644 | goto fail; | |
1645 | } | |
1646 | ||
8257b2dc MX |
1647 | writers = btrfs_alloc_subvolume_writers(); |
1648 | if (IS_ERR(writers)) { | |
1649 | ret = PTR_ERR(writers); | |
1650 | goto fail; | |
1651 | } | |
1652 | root->subv_writers = writers; | |
1653 | ||
cb517eab | 1654 | btrfs_init_free_ino_ctl(root); |
57cdc8db DS |
1655 | spin_lock_init(&root->ino_cache_lock); |
1656 | init_waitqueue_head(&root->ino_cache_wait); | |
cb517eab MX |
1657 | |
1658 | ret = get_anon_bdev(&root->anon_dev); | |
1659 | if (ret) | |
876d2cf1 | 1660 | goto fail; |
f32e48e9 CR |
1661 | |
1662 | mutex_lock(&root->objectid_mutex); | |
1663 | ret = btrfs_find_highest_objectid(root, | |
1664 | &root->highest_objectid); | |
1665 | if (ret) { | |
1666 | mutex_unlock(&root->objectid_mutex); | |
876d2cf1 | 1667 | goto fail; |
f32e48e9 CR |
1668 | } |
1669 | ||
1670 | ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); | |
1671 | ||
1672 | mutex_unlock(&root->objectid_mutex); | |
1673 | ||
cb517eab MX |
1674 | return 0; |
1675 | fail: | |
876d2cf1 | 1676 | /* the caller is responsible to call free_fs_root */ |
cb517eab MX |
1677 | return ret; |
1678 | } | |
1679 | ||
35bbb97f JM |
1680 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
1681 | u64 root_id) | |
cb517eab MX |
1682 | { |
1683 | struct btrfs_root *root; | |
1684 | ||
1685 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1686 | root = radix_tree_lookup(&fs_info->fs_roots_radix, | |
1687 | (unsigned long)root_id); | |
1688 | spin_unlock(&fs_info->fs_roots_radix_lock); | |
1689 | return root; | |
1690 | } | |
1691 | ||
1692 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, | |
1693 | struct btrfs_root *root) | |
1694 | { | |
1695 | int ret; | |
1696 | ||
e1860a77 | 1697 | ret = radix_tree_preload(GFP_NOFS); |
cb517eab MX |
1698 | if (ret) |
1699 | return ret; | |
1700 | ||
1701 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1702 | ret = radix_tree_insert(&fs_info->fs_roots_radix, | |
1703 | (unsigned long)root->root_key.objectid, | |
1704 | root); | |
1705 | if (ret == 0) | |
27cdeb70 | 1706 | set_bit(BTRFS_ROOT_IN_RADIX, &root->state); |
cb517eab MX |
1707 | spin_unlock(&fs_info->fs_roots_radix_lock); |
1708 | radix_tree_preload_end(); | |
1709 | ||
1710 | return ret; | |
1711 | } | |
1712 | ||
c00869f1 MX |
1713 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
1714 | struct btrfs_key *location, | |
1715 | bool check_ref) | |
5eda7b5e CM |
1716 | { |
1717 | struct btrfs_root *root; | |
381cf658 | 1718 | struct btrfs_path *path; |
1d4c08e0 | 1719 | struct btrfs_key key; |
5eda7b5e CM |
1720 | int ret; |
1721 | ||
edbd8d4e CM |
1722 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
1723 | return fs_info->tree_root; | |
1724 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
1725 | return fs_info->extent_root; | |
8f18cf13 CM |
1726 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
1727 | return fs_info->chunk_root; | |
1728 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) | |
1729 | return fs_info->dev_root; | |
0403e47e YZ |
1730 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
1731 | return fs_info->csum_root; | |
bcef60f2 AJ |
1732 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
1733 | return fs_info->quota_root ? fs_info->quota_root : | |
1734 | ERR_PTR(-ENOENT); | |
f7a81ea4 SB |
1735 | if (location->objectid == BTRFS_UUID_TREE_OBJECTID) |
1736 | return fs_info->uuid_root ? fs_info->uuid_root : | |
1737 | ERR_PTR(-ENOENT); | |
70f6d82e OS |
1738 | if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) |
1739 | return fs_info->free_space_root ? fs_info->free_space_root : | |
1740 | ERR_PTR(-ENOENT); | |
4df27c4d | 1741 | again: |
cb517eab | 1742 | root = btrfs_lookup_fs_root(fs_info, location->objectid); |
48475471 | 1743 | if (root) { |
c00869f1 | 1744 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) |
48475471 | 1745 | return ERR_PTR(-ENOENT); |
5eda7b5e | 1746 | return root; |
48475471 | 1747 | } |
5eda7b5e | 1748 | |
cb517eab | 1749 | root = btrfs_read_fs_root(fs_info->tree_root, location); |
5eda7b5e CM |
1750 | if (IS_ERR(root)) |
1751 | return root; | |
3394e160 | 1752 | |
c00869f1 | 1753 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) { |
cb517eab | 1754 | ret = -ENOENT; |
581bb050 | 1755 | goto fail; |
35a30d7c | 1756 | } |
581bb050 | 1757 | |
cb517eab | 1758 | ret = btrfs_init_fs_root(root); |
ac08aedf CM |
1759 | if (ret) |
1760 | goto fail; | |
3394e160 | 1761 | |
381cf658 DS |
1762 | path = btrfs_alloc_path(); |
1763 | if (!path) { | |
1764 | ret = -ENOMEM; | |
1765 | goto fail; | |
1766 | } | |
1d4c08e0 DS |
1767 | key.objectid = BTRFS_ORPHAN_OBJECTID; |
1768 | key.type = BTRFS_ORPHAN_ITEM_KEY; | |
1769 | key.offset = location->objectid; | |
1770 | ||
1771 | ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); | |
381cf658 | 1772 | btrfs_free_path(path); |
d68fc57b YZ |
1773 | if (ret < 0) |
1774 | goto fail; | |
1775 | if (ret == 0) | |
27cdeb70 | 1776 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
d68fc57b | 1777 | |
cb517eab | 1778 | ret = btrfs_insert_fs_root(fs_info, root); |
0f7d52f4 | 1779 | if (ret) { |
4df27c4d YZ |
1780 | if (ret == -EEXIST) { |
1781 | free_fs_root(root); | |
1782 | goto again; | |
1783 | } | |
1784 | goto fail; | |
0f7d52f4 | 1785 | } |
edbd8d4e | 1786 | return root; |
4df27c4d YZ |
1787 | fail: |
1788 | free_fs_root(root); | |
1789 | return ERR_PTR(ret); | |
edbd8d4e CM |
1790 | } |
1791 | ||
04160088 CM |
1792 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
1793 | { | |
1794 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; | |
1795 | int ret = 0; | |
04160088 CM |
1796 | struct btrfs_device *device; |
1797 | struct backing_dev_info *bdi; | |
b7967db7 | 1798 | |
1f78160c XG |
1799 | rcu_read_lock(); |
1800 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { | |
dfe25020 CM |
1801 | if (!device->bdev) |
1802 | continue; | |
04160088 | 1803 | bdi = blk_get_backing_dev_info(device->bdev); |
ff9ea323 | 1804 | if (bdi_congested(bdi, bdi_bits)) { |
04160088 CM |
1805 | ret = 1; |
1806 | break; | |
1807 | } | |
1808 | } | |
1f78160c | 1809 | rcu_read_unlock(); |
04160088 CM |
1810 | return ret; |
1811 | } | |
1812 | ||
04160088 CM |
1813 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
1814 | { | |
ad081f14 JA |
1815 | int err; |
1816 | ||
b4caecd4 | 1817 | err = bdi_setup_and_register(bdi, "btrfs"); |
ad081f14 JA |
1818 | if (err) |
1819 | return err; | |
1820 | ||
09cbfeaf | 1821 | bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; |
04160088 CM |
1822 | bdi->congested_fn = btrfs_congested_fn; |
1823 | bdi->congested_data = info; | |
da2f0f74 | 1824 | bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; |
04160088 CM |
1825 | return 0; |
1826 | } | |
1827 | ||
8b712842 CM |
1828 | /* |
1829 | * called by the kthread helper functions to finally call the bio end_io | |
1830 | * functions. This is where read checksum verification actually happens | |
1831 | */ | |
1832 | static void end_workqueue_fn(struct btrfs_work *work) | |
ce9adaa5 | 1833 | { |
ce9adaa5 | 1834 | struct bio *bio; |
97eb6b69 | 1835 | struct btrfs_end_io_wq *end_io_wq; |
ce9adaa5 | 1836 | |
97eb6b69 | 1837 | end_io_wq = container_of(work, struct btrfs_end_io_wq, work); |
8b712842 | 1838 | bio = end_io_wq->bio; |
ce9adaa5 | 1839 | |
4246a0b6 | 1840 | bio->bi_error = end_io_wq->error; |
8b712842 CM |
1841 | bio->bi_private = end_io_wq->private; |
1842 | bio->bi_end_io = end_io_wq->end_io; | |
97eb6b69 | 1843 | kmem_cache_free(btrfs_end_io_wq_cache, end_io_wq); |
4246a0b6 | 1844 | bio_endio(bio); |
44b8bd7e CM |
1845 | } |
1846 | ||
a74a4b97 CM |
1847 | static int cleaner_kthread(void *arg) |
1848 | { | |
1849 | struct btrfs_root *root = arg; | |
0b246afa | 1850 | struct btrfs_fs_info *fs_info = root->fs_info; |
d0278245 | 1851 | int again; |
da288d28 | 1852 | struct btrfs_trans_handle *trans; |
a74a4b97 CM |
1853 | |
1854 | do { | |
d0278245 | 1855 | again = 0; |
a74a4b97 | 1856 | |
d0278245 | 1857 | /* Make the cleaner go to sleep early. */ |
2ff7e61e | 1858 | if (btrfs_need_cleaner_sleep(fs_info)) |
d0278245 MX |
1859 | goto sleep; |
1860 | ||
90c711ab ZB |
1861 | /* |
1862 | * Do not do anything if we might cause open_ctree() to block | |
1863 | * before we have finished mounting the filesystem. | |
1864 | */ | |
0b246afa | 1865 | if (!test_bit(BTRFS_FS_OPEN, &fs_info->flags)) |
90c711ab ZB |
1866 | goto sleep; |
1867 | ||
0b246afa | 1868 | if (!mutex_trylock(&fs_info->cleaner_mutex)) |
d0278245 MX |
1869 | goto sleep; |
1870 | ||
dc7f370c MX |
1871 | /* |
1872 | * Avoid the problem that we change the status of the fs | |
1873 | * during the above check and trylock. | |
1874 | */ | |
2ff7e61e | 1875 | if (btrfs_need_cleaner_sleep(fs_info)) { |
0b246afa | 1876 | mutex_unlock(&fs_info->cleaner_mutex); |
dc7f370c | 1877 | goto sleep; |
76dda93c | 1878 | } |
a74a4b97 | 1879 | |
0b246afa | 1880 | mutex_lock(&fs_info->cleaner_delayed_iput_mutex); |
2ff7e61e | 1881 | btrfs_run_delayed_iputs(fs_info); |
0b246afa | 1882 | mutex_unlock(&fs_info->cleaner_delayed_iput_mutex); |
c2d6cb16 | 1883 | |
d0278245 | 1884 | again = btrfs_clean_one_deleted_snapshot(root); |
0b246afa | 1885 | mutex_unlock(&fs_info->cleaner_mutex); |
d0278245 MX |
1886 | |
1887 | /* | |
05323cd1 MX |
1888 | * The defragger has dealt with the R/O remount and umount, |
1889 | * needn't do anything special here. | |
d0278245 | 1890 | */ |
0b246afa | 1891 | btrfs_run_defrag_inodes(fs_info); |
67c5e7d4 FM |
1892 | |
1893 | /* | |
1894 | * Acquires fs_info->delete_unused_bgs_mutex to avoid racing | |
1895 | * with relocation (btrfs_relocate_chunk) and relocation | |
1896 | * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group) | |
1897 | * after acquiring fs_info->delete_unused_bgs_mutex. So we | |
1898 | * can't hold, nor need to, fs_info->cleaner_mutex when deleting | |
1899 | * unused block groups. | |
1900 | */ | |
0b246afa | 1901 | btrfs_delete_unused_bgs(fs_info); |
d0278245 | 1902 | sleep: |
838fe188 | 1903 | if (!again) { |
a74a4b97 | 1904 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa YZ |
1905 | if (!kthread_should_stop()) |
1906 | schedule(); | |
a74a4b97 CM |
1907 | __set_current_state(TASK_RUNNING); |
1908 | } | |
1909 | } while (!kthread_should_stop()); | |
da288d28 FM |
1910 | |
1911 | /* | |
1912 | * Transaction kthread is stopped before us and wakes us up. | |
1913 | * However we might have started a new transaction and COWed some | |
1914 | * tree blocks when deleting unused block groups for example. So | |
1915 | * make sure we commit the transaction we started to have a clean | |
1916 | * shutdown when evicting the btree inode - if it has dirty pages | |
1917 | * when we do the final iput() on it, eviction will trigger a | |
1918 | * writeback for it which will fail with null pointer dereferences | |
1919 | * since work queues and other resources were already released and | |
1920 | * destroyed by the time the iput/eviction/writeback is made. | |
1921 | */ | |
1922 | trans = btrfs_attach_transaction(root); | |
1923 | if (IS_ERR(trans)) { | |
1924 | if (PTR_ERR(trans) != -ENOENT) | |
0b246afa | 1925 | btrfs_err(fs_info, |
da288d28 FM |
1926 | "cleaner transaction attach returned %ld", |
1927 | PTR_ERR(trans)); | |
1928 | } else { | |
1929 | int ret; | |
1930 | ||
3a45bb20 | 1931 | ret = btrfs_commit_transaction(trans); |
da288d28 | 1932 | if (ret) |
0b246afa | 1933 | btrfs_err(fs_info, |
da288d28 FM |
1934 | "cleaner open transaction commit returned %d", |
1935 | ret); | |
1936 | } | |
1937 | ||
a74a4b97 CM |
1938 | return 0; |
1939 | } | |
1940 | ||
1941 | static int transaction_kthread(void *arg) | |
1942 | { | |
1943 | struct btrfs_root *root = arg; | |
0b246afa | 1944 | struct btrfs_fs_info *fs_info = root->fs_info; |
a74a4b97 CM |
1945 | struct btrfs_trans_handle *trans; |
1946 | struct btrfs_transaction *cur; | |
8929ecfa | 1947 | u64 transid; |
a74a4b97 CM |
1948 | unsigned long now; |
1949 | unsigned long delay; | |
914b2007 | 1950 | bool cannot_commit; |
a74a4b97 CM |
1951 | |
1952 | do { | |
914b2007 | 1953 | cannot_commit = false; |
0b246afa JM |
1954 | delay = HZ * fs_info->commit_interval; |
1955 | mutex_lock(&fs_info->transaction_kthread_mutex); | |
a74a4b97 | 1956 | |
0b246afa JM |
1957 | spin_lock(&fs_info->trans_lock); |
1958 | cur = fs_info->running_transaction; | |
a74a4b97 | 1959 | if (!cur) { |
0b246afa | 1960 | spin_unlock(&fs_info->trans_lock); |
a74a4b97 CM |
1961 | goto sleep; |
1962 | } | |
31153d81 | 1963 | |
a74a4b97 | 1964 | now = get_seconds(); |
4a9d8bde | 1965 | if (cur->state < TRANS_STATE_BLOCKED && |
8b87dc17 | 1966 | (now < cur->start_time || |
0b246afa JM |
1967 | now - cur->start_time < fs_info->commit_interval)) { |
1968 | spin_unlock(&fs_info->trans_lock); | |
a74a4b97 CM |
1969 | delay = HZ * 5; |
1970 | goto sleep; | |
1971 | } | |
8929ecfa | 1972 | transid = cur->transid; |
0b246afa | 1973 | spin_unlock(&fs_info->trans_lock); |
56bec294 | 1974 | |
79787eaa | 1975 | /* If the file system is aborted, this will always fail. */ |
354aa0fb | 1976 | trans = btrfs_attach_transaction(root); |
914b2007 | 1977 | if (IS_ERR(trans)) { |
354aa0fb MX |
1978 | if (PTR_ERR(trans) != -ENOENT) |
1979 | cannot_commit = true; | |
79787eaa | 1980 | goto sleep; |
914b2007 | 1981 | } |
8929ecfa | 1982 | if (transid == trans->transid) { |
3a45bb20 | 1983 | btrfs_commit_transaction(trans); |
8929ecfa | 1984 | } else { |
3a45bb20 | 1985 | btrfs_end_transaction(trans); |
8929ecfa | 1986 | } |
a74a4b97 | 1987 | sleep: |
0b246afa JM |
1988 | wake_up_process(fs_info->cleaner_kthread); |
1989 | mutex_unlock(&fs_info->transaction_kthread_mutex); | |
a74a4b97 | 1990 | |
4e121c06 | 1991 | if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, |
0b246afa | 1992 | &fs_info->fs_state))) |
2ff7e61e | 1993 | btrfs_cleanup_transaction(fs_info); |
ce63f891 JK |
1994 | set_current_state(TASK_INTERRUPTIBLE); |
1995 | if (!kthread_should_stop() && | |
0b246afa | 1996 | (!btrfs_transaction_blocked(fs_info) || |
ce63f891 JK |
1997 | cannot_commit)) |
1998 | schedule_timeout(delay); | |
1999 | __set_current_state(TASK_RUNNING); | |
a74a4b97 CM |
2000 | } while (!kthread_should_stop()); |
2001 | return 0; | |
2002 | } | |
2003 | ||
af31f5e5 CM |
2004 | /* |
2005 | * this will find the highest generation in the array of | |
2006 | * root backups. The index of the highest array is returned, | |
2007 | * or -1 if we can't find anything. | |
2008 | * | |
2009 | * We check to make sure the array is valid by comparing the | |
2010 | * generation of the latest root in the array with the generation | |
2011 | * in the super block. If they don't match we pitch it. | |
2012 | */ | |
2013 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) | |
2014 | { | |
2015 | u64 cur; | |
2016 | int newest_index = -1; | |
2017 | struct btrfs_root_backup *root_backup; | |
2018 | int i; | |
2019 | ||
2020 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { | |
2021 | root_backup = info->super_copy->super_roots + i; | |
2022 | cur = btrfs_backup_tree_root_gen(root_backup); | |
2023 | if (cur == newest_gen) | |
2024 | newest_index = i; | |
2025 | } | |
2026 | ||
2027 | /* check to see if we actually wrapped around */ | |
2028 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { | |
2029 | root_backup = info->super_copy->super_roots; | |
2030 | cur = btrfs_backup_tree_root_gen(root_backup); | |
2031 | if (cur == newest_gen) | |
2032 | newest_index = 0; | |
2033 | } | |
2034 | return newest_index; | |
2035 | } | |
2036 | ||
2037 | ||
2038 | /* | |
2039 | * find the oldest backup so we know where to store new entries | |
2040 | * in the backup array. This will set the backup_root_index | |
2041 | * field in the fs_info struct | |
2042 | */ | |
2043 | static void find_oldest_super_backup(struct btrfs_fs_info *info, | |
2044 | u64 newest_gen) | |
2045 | { | |
2046 | int newest_index = -1; | |
2047 | ||
2048 | newest_index = find_newest_super_backup(info, newest_gen); | |
2049 | /* if there was garbage in there, just move along */ | |
2050 | if (newest_index == -1) { | |
2051 | info->backup_root_index = 0; | |
2052 | } else { | |
2053 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | /* | |
2058 | * copy all the root pointers into the super backup array. | |
2059 | * this will bump the backup pointer by one when it is | |
2060 | * done | |
2061 | */ | |
2062 | static void backup_super_roots(struct btrfs_fs_info *info) | |
2063 | { | |
2064 | int next_backup; | |
2065 | struct btrfs_root_backup *root_backup; | |
2066 | int last_backup; | |
2067 | ||
2068 | next_backup = info->backup_root_index; | |
2069 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
2070 | BTRFS_NUM_BACKUP_ROOTS; | |
2071 | ||
2072 | /* | |
2073 | * just overwrite the last backup if we're at the same generation | |
2074 | * this happens only at umount | |
2075 | */ | |
2076 | root_backup = info->super_for_commit->super_roots + last_backup; | |
2077 | if (btrfs_backup_tree_root_gen(root_backup) == | |
2078 | btrfs_header_generation(info->tree_root->node)) | |
2079 | next_backup = last_backup; | |
2080 | ||
2081 | root_backup = info->super_for_commit->super_roots + next_backup; | |
2082 | ||
2083 | /* | |
2084 | * make sure all of our padding and empty slots get zero filled | |
2085 | * regardless of which ones we use today | |
2086 | */ | |
2087 | memset(root_backup, 0, sizeof(*root_backup)); | |
2088 | ||
2089 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
2090 | ||
2091 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); | |
2092 | btrfs_set_backup_tree_root_gen(root_backup, | |
2093 | btrfs_header_generation(info->tree_root->node)); | |
2094 | ||
2095 | btrfs_set_backup_tree_root_level(root_backup, | |
2096 | btrfs_header_level(info->tree_root->node)); | |
2097 | ||
2098 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); | |
2099 | btrfs_set_backup_chunk_root_gen(root_backup, | |
2100 | btrfs_header_generation(info->chunk_root->node)); | |
2101 | btrfs_set_backup_chunk_root_level(root_backup, | |
2102 | btrfs_header_level(info->chunk_root->node)); | |
2103 | ||
2104 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); | |
2105 | btrfs_set_backup_extent_root_gen(root_backup, | |
2106 | btrfs_header_generation(info->extent_root->node)); | |
2107 | btrfs_set_backup_extent_root_level(root_backup, | |
2108 | btrfs_header_level(info->extent_root->node)); | |
2109 | ||
7c7e82a7 CM |
2110 | /* |
2111 | * we might commit during log recovery, which happens before we set | |
2112 | * the fs_root. Make sure it is valid before we fill it in. | |
2113 | */ | |
2114 | if (info->fs_root && info->fs_root->node) { | |
2115 | btrfs_set_backup_fs_root(root_backup, | |
2116 | info->fs_root->node->start); | |
2117 | btrfs_set_backup_fs_root_gen(root_backup, | |
af31f5e5 | 2118 | btrfs_header_generation(info->fs_root->node)); |
7c7e82a7 | 2119 | btrfs_set_backup_fs_root_level(root_backup, |
af31f5e5 | 2120 | btrfs_header_level(info->fs_root->node)); |
7c7e82a7 | 2121 | } |
af31f5e5 CM |
2122 | |
2123 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); | |
2124 | btrfs_set_backup_dev_root_gen(root_backup, | |
2125 | btrfs_header_generation(info->dev_root->node)); | |
2126 | btrfs_set_backup_dev_root_level(root_backup, | |
2127 | btrfs_header_level(info->dev_root->node)); | |
2128 | ||
2129 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); | |
2130 | btrfs_set_backup_csum_root_gen(root_backup, | |
2131 | btrfs_header_generation(info->csum_root->node)); | |
2132 | btrfs_set_backup_csum_root_level(root_backup, | |
2133 | btrfs_header_level(info->csum_root->node)); | |
2134 | ||
2135 | btrfs_set_backup_total_bytes(root_backup, | |
2136 | btrfs_super_total_bytes(info->super_copy)); | |
2137 | btrfs_set_backup_bytes_used(root_backup, | |
2138 | btrfs_super_bytes_used(info->super_copy)); | |
2139 | btrfs_set_backup_num_devices(root_backup, | |
2140 | btrfs_super_num_devices(info->super_copy)); | |
2141 | ||
2142 | /* | |
2143 | * if we don't copy this out to the super_copy, it won't get remembered | |
2144 | * for the next commit | |
2145 | */ | |
2146 | memcpy(&info->super_copy->super_roots, | |
2147 | &info->super_for_commit->super_roots, | |
2148 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | * this copies info out of the root backup array and back into | |
2153 | * the in-memory super block. It is meant to help iterate through | |
2154 | * the array, so you send it the number of backups you've already | |
2155 | * tried and the last backup index you used. | |
2156 | * | |
2157 | * this returns -1 when it has tried all the backups | |
2158 | */ | |
2159 | static noinline int next_root_backup(struct btrfs_fs_info *info, | |
2160 | struct btrfs_super_block *super, | |
2161 | int *num_backups_tried, int *backup_index) | |
2162 | { | |
2163 | struct btrfs_root_backup *root_backup; | |
2164 | int newest = *backup_index; | |
2165 | ||
2166 | if (*num_backups_tried == 0) { | |
2167 | u64 gen = btrfs_super_generation(super); | |
2168 | ||
2169 | newest = find_newest_super_backup(info, gen); | |
2170 | if (newest == -1) | |
2171 | return -1; | |
2172 | ||
2173 | *backup_index = newest; | |
2174 | *num_backups_tried = 1; | |
2175 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { | |
2176 | /* we've tried all the backups, all done */ | |
2177 | return -1; | |
2178 | } else { | |
2179 | /* jump to the next oldest backup */ | |
2180 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
2181 | BTRFS_NUM_BACKUP_ROOTS; | |
2182 | *backup_index = newest; | |
2183 | *num_backups_tried += 1; | |
2184 | } | |
2185 | root_backup = super->super_roots + newest; | |
2186 | ||
2187 | btrfs_set_super_generation(super, | |
2188 | btrfs_backup_tree_root_gen(root_backup)); | |
2189 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); | |
2190 | btrfs_set_super_root_level(super, | |
2191 | btrfs_backup_tree_root_level(root_backup)); | |
2192 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); | |
2193 | ||
2194 | /* | |
2195 | * fixme: the total bytes and num_devices need to match or we should | |
2196 | * need a fsck | |
2197 | */ | |
2198 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); | |
2199 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); | |
2200 | return 0; | |
2201 | } | |
2202 | ||
7abadb64 LB |
2203 | /* helper to cleanup workers */ |
2204 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) | |
2205 | { | |
dc6e3209 | 2206 | btrfs_destroy_workqueue(fs_info->fixup_workers); |
afe3d242 | 2207 | btrfs_destroy_workqueue(fs_info->delalloc_workers); |
5cdc7ad3 | 2208 | btrfs_destroy_workqueue(fs_info->workers); |
fccb5d86 QW |
2209 | btrfs_destroy_workqueue(fs_info->endio_workers); |
2210 | btrfs_destroy_workqueue(fs_info->endio_meta_workers); | |
2211 | btrfs_destroy_workqueue(fs_info->endio_raid56_workers); | |
8b110e39 | 2212 | btrfs_destroy_workqueue(fs_info->endio_repair_workers); |
d05a33ac | 2213 | btrfs_destroy_workqueue(fs_info->rmw_workers); |
fccb5d86 QW |
2214 | btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); |
2215 | btrfs_destroy_workqueue(fs_info->endio_write_workers); | |
2216 | btrfs_destroy_workqueue(fs_info->endio_freespace_worker); | |
a8c93d4e | 2217 | btrfs_destroy_workqueue(fs_info->submit_workers); |
5b3bc44e | 2218 | btrfs_destroy_workqueue(fs_info->delayed_workers); |
e66f0bb1 | 2219 | btrfs_destroy_workqueue(fs_info->caching_workers); |
736cfa15 | 2220 | btrfs_destroy_workqueue(fs_info->readahead_workers); |
a44903ab | 2221 | btrfs_destroy_workqueue(fs_info->flush_workers); |
fc97fab0 | 2222 | btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); |
a79b7d4b | 2223 | btrfs_destroy_workqueue(fs_info->extent_workers); |
7abadb64 LB |
2224 | } |
2225 | ||
2e9f5954 R |
2226 | static void free_root_extent_buffers(struct btrfs_root *root) |
2227 | { | |
2228 | if (root) { | |
2229 | free_extent_buffer(root->node); | |
2230 | free_extent_buffer(root->commit_root); | |
2231 | root->node = NULL; | |
2232 | root->commit_root = NULL; | |
2233 | } | |
2234 | } | |
2235 | ||
af31f5e5 CM |
2236 | /* helper to cleanup tree roots */ |
2237 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) | |
2238 | { | |
2e9f5954 | 2239 | free_root_extent_buffers(info->tree_root); |
655b09fe | 2240 | |
2e9f5954 R |
2241 | free_root_extent_buffers(info->dev_root); |
2242 | free_root_extent_buffers(info->extent_root); | |
2243 | free_root_extent_buffers(info->csum_root); | |
2244 | free_root_extent_buffers(info->quota_root); | |
2245 | free_root_extent_buffers(info->uuid_root); | |
2246 | if (chunk_root) | |
2247 | free_root_extent_buffers(info->chunk_root); | |
70f6d82e | 2248 | free_root_extent_buffers(info->free_space_root); |
af31f5e5 CM |
2249 | } |
2250 | ||
faa2dbf0 | 2251 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) |
171f6537 JB |
2252 | { |
2253 | int ret; | |
2254 | struct btrfs_root *gang[8]; | |
2255 | int i; | |
2256 | ||
2257 | while (!list_empty(&fs_info->dead_roots)) { | |
2258 | gang[0] = list_entry(fs_info->dead_roots.next, | |
2259 | struct btrfs_root, root_list); | |
2260 | list_del(&gang[0]->root_list); | |
2261 | ||
27cdeb70 | 2262 | if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { |
cb517eab | 2263 | btrfs_drop_and_free_fs_root(fs_info, gang[0]); |
171f6537 JB |
2264 | } else { |
2265 | free_extent_buffer(gang[0]->node); | |
2266 | free_extent_buffer(gang[0]->commit_root); | |
b0feb9d9 | 2267 | btrfs_put_fs_root(gang[0]); |
171f6537 JB |
2268 | } |
2269 | } | |
2270 | ||
2271 | while (1) { | |
2272 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
2273 | (void **)gang, 0, | |
2274 | ARRAY_SIZE(gang)); | |
2275 | if (!ret) | |
2276 | break; | |
2277 | for (i = 0; i < ret; i++) | |
cb517eab | 2278 | btrfs_drop_and_free_fs_root(fs_info, gang[i]); |
171f6537 | 2279 | } |
1a4319cc LB |
2280 | |
2281 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { | |
2282 | btrfs_free_log_root_tree(NULL, fs_info); | |
2ff7e61e | 2283 | btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); |
1a4319cc | 2284 | } |
171f6537 | 2285 | } |
af31f5e5 | 2286 | |
638aa7ed ES |
2287 | static void btrfs_init_scrub(struct btrfs_fs_info *fs_info) |
2288 | { | |
2289 | mutex_init(&fs_info->scrub_lock); | |
2290 | atomic_set(&fs_info->scrubs_running, 0); | |
2291 | atomic_set(&fs_info->scrub_pause_req, 0); | |
2292 | atomic_set(&fs_info->scrubs_paused, 0); | |
2293 | atomic_set(&fs_info->scrub_cancel_req, 0); | |
2294 | init_waitqueue_head(&fs_info->scrub_pause_wait); | |
2295 | fs_info->scrub_workers_refcnt = 0; | |
2296 | } | |
2297 | ||
779a65a4 ES |
2298 | static void btrfs_init_balance(struct btrfs_fs_info *fs_info) |
2299 | { | |
2300 | spin_lock_init(&fs_info->balance_lock); | |
2301 | mutex_init(&fs_info->balance_mutex); | |
2302 | atomic_set(&fs_info->balance_running, 0); | |
2303 | atomic_set(&fs_info->balance_pause_req, 0); | |
2304 | atomic_set(&fs_info->balance_cancel_req, 0); | |
2305 | fs_info->balance_ctl = NULL; | |
2306 | init_waitqueue_head(&fs_info->balance_wait_q); | |
2307 | } | |
2308 | ||
6bccf3ab | 2309 | static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info) |
f37938e0 | 2310 | { |
2ff7e61e JM |
2311 | struct inode *inode = fs_info->btree_inode; |
2312 | ||
2313 | inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; | |
2314 | set_nlink(inode, 1); | |
f37938e0 ES |
2315 | /* |
2316 | * we set the i_size on the btree inode to the max possible int. | |
2317 | * the real end of the address space is determined by all of | |
2318 | * the devices in the system | |
2319 | */ | |
2ff7e61e JM |
2320 | inode->i_size = OFFSET_MAX; |
2321 | inode->i_mapping->a_ops = &btree_aops; | |
f37938e0 | 2322 | |
2ff7e61e JM |
2323 | RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node); |
2324 | extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode->i_mapping); | |
2325 | BTRFS_I(inode)->io_tree.track_uptodate = 0; | |
2326 | extent_map_tree_init(&BTRFS_I(inode)->extent_tree); | |
f37938e0 | 2327 | |
2ff7e61e | 2328 | BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops; |
f37938e0 | 2329 | |
2ff7e61e JM |
2330 | BTRFS_I(inode)->root = fs_info->tree_root; |
2331 | memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key)); | |
2332 | set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags); | |
2333 | btrfs_insert_inode_hash(inode); | |
f37938e0 ES |
2334 | } |
2335 | ||
ad618368 ES |
2336 | static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) |
2337 | { | |
2338 | fs_info->dev_replace.lock_owner = 0; | |
2339 | atomic_set(&fs_info->dev_replace.nesting_level, 0); | |
2340 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); | |
73beece9 LB |
2341 | rwlock_init(&fs_info->dev_replace.lock); |
2342 | atomic_set(&fs_info->dev_replace.read_locks, 0); | |
2343 | atomic_set(&fs_info->dev_replace.blocking_readers, 0); | |
ad618368 | 2344 | init_waitqueue_head(&fs_info->replace_wait); |
73beece9 | 2345 | init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); |
ad618368 ES |
2346 | } |
2347 | ||
f9e92e40 ES |
2348 | static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) |
2349 | { | |
2350 | spin_lock_init(&fs_info->qgroup_lock); | |
2351 | mutex_init(&fs_info->qgroup_ioctl_lock); | |
2352 | fs_info->qgroup_tree = RB_ROOT; | |
2353 | fs_info->qgroup_op_tree = RB_ROOT; | |
2354 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); | |
2355 | fs_info->qgroup_seq = 1; | |
f9e92e40 | 2356 | fs_info->qgroup_ulist = NULL; |
d2c609b8 | 2357 | fs_info->qgroup_rescan_running = false; |
f9e92e40 ES |
2358 | mutex_init(&fs_info->qgroup_rescan_lock); |
2359 | } | |
2360 | ||
2a458198 ES |
2361 | static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, |
2362 | struct btrfs_fs_devices *fs_devices) | |
2363 | { | |
2364 | int max_active = fs_info->thread_pool_size; | |
6f011058 | 2365 | unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; |
2a458198 ES |
2366 | |
2367 | fs_info->workers = | |
cb001095 JM |
2368 | btrfs_alloc_workqueue(fs_info, "worker", |
2369 | flags | WQ_HIGHPRI, max_active, 16); | |
2a458198 ES |
2370 | |
2371 | fs_info->delalloc_workers = | |
cb001095 JM |
2372 | btrfs_alloc_workqueue(fs_info, "delalloc", |
2373 | flags, max_active, 2); | |
2a458198 ES |
2374 | |
2375 | fs_info->flush_workers = | |
cb001095 JM |
2376 | btrfs_alloc_workqueue(fs_info, "flush_delalloc", |
2377 | flags, max_active, 0); | |
2a458198 ES |
2378 | |
2379 | fs_info->caching_workers = | |
cb001095 | 2380 | btrfs_alloc_workqueue(fs_info, "cache", flags, max_active, 0); |
2a458198 ES |
2381 | |
2382 | /* | |
2383 | * a higher idle thresh on the submit workers makes it much more | |
2384 | * likely that bios will be send down in a sane order to the | |
2385 | * devices | |
2386 | */ | |
2387 | fs_info->submit_workers = | |
cb001095 | 2388 | btrfs_alloc_workqueue(fs_info, "submit", flags, |
2a458198 ES |
2389 | min_t(u64, fs_devices->num_devices, |
2390 | max_active), 64); | |
2391 | ||
2392 | fs_info->fixup_workers = | |
cb001095 | 2393 | btrfs_alloc_workqueue(fs_info, "fixup", flags, 1, 0); |
2a458198 ES |
2394 | |
2395 | /* | |
2396 | * endios are largely parallel and should have a very | |
2397 | * low idle thresh | |
2398 | */ | |
2399 | fs_info->endio_workers = | |
cb001095 | 2400 | btrfs_alloc_workqueue(fs_info, "endio", flags, max_active, 4); |
2a458198 | 2401 | fs_info->endio_meta_workers = |
cb001095 JM |
2402 | btrfs_alloc_workqueue(fs_info, "endio-meta", flags, |
2403 | max_active, 4); | |
2a458198 | 2404 | fs_info->endio_meta_write_workers = |
cb001095 JM |
2405 | btrfs_alloc_workqueue(fs_info, "endio-meta-write", flags, |
2406 | max_active, 2); | |
2a458198 | 2407 | fs_info->endio_raid56_workers = |
cb001095 JM |
2408 | btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, |
2409 | max_active, 4); | |
2a458198 | 2410 | fs_info->endio_repair_workers = |
cb001095 | 2411 | btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); |
2a458198 | 2412 | fs_info->rmw_workers = |
cb001095 | 2413 | btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); |
2a458198 | 2414 | fs_info->endio_write_workers = |
cb001095 JM |
2415 | btrfs_alloc_workqueue(fs_info, "endio-write", flags, |
2416 | max_active, 2); | |
2a458198 | 2417 | fs_info->endio_freespace_worker = |
cb001095 JM |
2418 | btrfs_alloc_workqueue(fs_info, "freespace-write", flags, |
2419 | max_active, 0); | |
2a458198 | 2420 | fs_info->delayed_workers = |
cb001095 JM |
2421 | btrfs_alloc_workqueue(fs_info, "delayed-meta", flags, |
2422 | max_active, 0); | |
2a458198 | 2423 | fs_info->readahead_workers = |
cb001095 JM |
2424 | btrfs_alloc_workqueue(fs_info, "readahead", flags, |
2425 | max_active, 2); | |
2a458198 | 2426 | fs_info->qgroup_rescan_workers = |
cb001095 | 2427 | btrfs_alloc_workqueue(fs_info, "qgroup-rescan", flags, 1, 0); |
2a458198 | 2428 | fs_info->extent_workers = |
cb001095 | 2429 | btrfs_alloc_workqueue(fs_info, "extent-refs", flags, |
2a458198 ES |
2430 | min_t(u64, fs_devices->num_devices, |
2431 | max_active), 8); | |
2432 | ||
2433 | if (!(fs_info->workers && fs_info->delalloc_workers && | |
2434 | fs_info->submit_workers && fs_info->flush_workers && | |
2435 | fs_info->endio_workers && fs_info->endio_meta_workers && | |
2436 | fs_info->endio_meta_write_workers && | |
2437 | fs_info->endio_repair_workers && | |
2438 | fs_info->endio_write_workers && fs_info->endio_raid56_workers && | |
2439 | fs_info->endio_freespace_worker && fs_info->rmw_workers && | |
2440 | fs_info->caching_workers && fs_info->readahead_workers && | |
2441 | fs_info->fixup_workers && fs_info->delayed_workers && | |
2442 | fs_info->extent_workers && | |
2443 | fs_info->qgroup_rescan_workers)) { | |
2444 | return -ENOMEM; | |
2445 | } | |
2446 | ||
2447 | return 0; | |
2448 | } | |
2449 | ||
63443bf5 ES |
2450 | static int btrfs_replay_log(struct btrfs_fs_info *fs_info, |
2451 | struct btrfs_fs_devices *fs_devices) | |
2452 | { | |
2453 | int ret; | |
63443bf5 ES |
2454 | struct btrfs_root *log_tree_root; |
2455 | struct btrfs_super_block *disk_super = fs_info->super_copy; | |
2456 | u64 bytenr = btrfs_super_log_root(disk_super); | |
2457 | ||
2458 | if (fs_devices->rw_devices == 0) { | |
f14d104d | 2459 | btrfs_warn(fs_info, "log replay required on RO media"); |
63443bf5 ES |
2460 | return -EIO; |
2461 | } | |
2462 | ||
74e4d827 | 2463 | log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
63443bf5 ES |
2464 | if (!log_tree_root) |
2465 | return -ENOMEM; | |
2466 | ||
da17066c | 2467 | __setup_root(log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
63443bf5 | 2468 | |
2ff7e61e JM |
2469 | log_tree_root->node = read_tree_block(fs_info, bytenr, |
2470 | fs_info->generation + 1); | |
64c043de | 2471 | if (IS_ERR(log_tree_root->node)) { |
f14d104d | 2472 | btrfs_warn(fs_info, "failed to read log tree"); |
0eeff236 | 2473 | ret = PTR_ERR(log_tree_root->node); |
64c043de | 2474 | kfree(log_tree_root); |
0eeff236 | 2475 | return ret; |
64c043de | 2476 | } else if (!extent_buffer_uptodate(log_tree_root->node)) { |
f14d104d | 2477 | btrfs_err(fs_info, "failed to read log tree"); |
63443bf5 ES |
2478 | free_extent_buffer(log_tree_root->node); |
2479 | kfree(log_tree_root); | |
2480 | return -EIO; | |
2481 | } | |
2482 | /* returns with log_tree_root freed on success */ | |
2483 | ret = btrfs_recover_log_trees(log_tree_root); | |
2484 | if (ret) { | |
0b246afa JM |
2485 | btrfs_handle_fs_error(fs_info, ret, |
2486 | "Failed to recover log tree"); | |
63443bf5 ES |
2487 | free_extent_buffer(log_tree_root->node); |
2488 | kfree(log_tree_root); | |
2489 | return ret; | |
2490 | } | |
2491 | ||
2492 | if (fs_info->sb->s_flags & MS_RDONLY) { | |
6bccf3ab | 2493 | ret = btrfs_commit_super(fs_info); |
63443bf5 ES |
2494 | if (ret) |
2495 | return ret; | |
2496 | } | |
2497 | ||
2498 | return 0; | |
2499 | } | |
2500 | ||
6bccf3ab | 2501 | static int btrfs_read_roots(struct btrfs_fs_info *fs_info) |
4bbcaa64 | 2502 | { |
6bccf3ab | 2503 | struct btrfs_root *tree_root = fs_info->tree_root; |
a4f3d2c4 | 2504 | struct btrfs_root *root; |
4bbcaa64 ES |
2505 | struct btrfs_key location; |
2506 | int ret; | |
2507 | ||
6bccf3ab JM |
2508 | BUG_ON(!fs_info->tree_root); |
2509 | ||
4bbcaa64 ES |
2510 | location.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
2511 | location.type = BTRFS_ROOT_ITEM_KEY; | |
2512 | location.offset = 0; | |
2513 | ||
a4f3d2c4 DS |
2514 | root = btrfs_read_tree_root(tree_root, &location); |
2515 | if (IS_ERR(root)) | |
2516 | return PTR_ERR(root); | |
2517 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2518 | fs_info->extent_root = root; | |
4bbcaa64 ES |
2519 | |
2520 | location.objectid = BTRFS_DEV_TREE_OBJECTID; | |
a4f3d2c4 DS |
2521 | root = btrfs_read_tree_root(tree_root, &location); |
2522 | if (IS_ERR(root)) | |
2523 | return PTR_ERR(root); | |
2524 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2525 | fs_info->dev_root = root; | |
4bbcaa64 ES |
2526 | btrfs_init_devices_late(fs_info); |
2527 | ||
2528 | location.objectid = BTRFS_CSUM_TREE_OBJECTID; | |
a4f3d2c4 DS |
2529 | root = btrfs_read_tree_root(tree_root, &location); |
2530 | if (IS_ERR(root)) | |
2531 | return PTR_ERR(root); | |
2532 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2533 | fs_info->csum_root = root; | |
4bbcaa64 ES |
2534 | |
2535 | location.objectid = BTRFS_QUOTA_TREE_OBJECTID; | |
a4f3d2c4 DS |
2536 | root = btrfs_read_tree_root(tree_root, &location); |
2537 | if (!IS_ERR(root)) { | |
2538 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
afcdd129 | 2539 | set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
a4f3d2c4 | 2540 | fs_info->quota_root = root; |
4bbcaa64 ES |
2541 | } |
2542 | ||
2543 | location.objectid = BTRFS_UUID_TREE_OBJECTID; | |
a4f3d2c4 DS |
2544 | root = btrfs_read_tree_root(tree_root, &location); |
2545 | if (IS_ERR(root)) { | |
2546 | ret = PTR_ERR(root); | |
4bbcaa64 ES |
2547 | if (ret != -ENOENT) |
2548 | return ret; | |
2549 | } else { | |
a4f3d2c4 DS |
2550 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
2551 | fs_info->uuid_root = root; | |
4bbcaa64 ES |
2552 | } |
2553 | ||
70f6d82e OS |
2554 | if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
2555 | location.objectid = BTRFS_FREE_SPACE_TREE_OBJECTID; | |
2556 | root = btrfs_read_tree_root(tree_root, &location); | |
2557 | if (IS_ERR(root)) | |
2558 | return PTR_ERR(root); | |
2559 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); | |
2560 | fs_info->free_space_root = root; | |
2561 | } | |
2562 | ||
4bbcaa64 ES |
2563 | return 0; |
2564 | } | |
2565 | ||
ad2b2c80 AV |
2566 | int open_ctree(struct super_block *sb, |
2567 | struct btrfs_fs_devices *fs_devices, | |
2568 | char *options) | |
2e635a27 | 2569 | { |
db94535d CM |
2570 | u32 sectorsize; |
2571 | u32 nodesize; | |
87ee04eb | 2572 | u32 stripesize; |
84234f3a | 2573 | u64 generation; |
f2b636e8 | 2574 | u64 features; |
3de4586c | 2575 | struct btrfs_key location; |
a061fc8d | 2576 | struct buffer_head *bh; |
4d34b278 | 2577 | struct btrfs_super_block *disk_super; |
815745cf | 2578 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
f84a8bd6 | 2579 | struct btrfs_root *tree_root; |
4d34b278 | 2580 | struct btrfs_root *chunk_root; |
eb60ceac | 2581 | int ret; |
e58ca020 | 2582 | int err = -EINVAL; |
af31f5e5 CM |
2583 | int num_backups_tried = 0; |
2584 | int backup_index = 0; | |
5cdc7ad3 | 2585 | int max_active; |
6675df31 | 2586 | int clear_free_space_tree = 0; |
4543df7e | 2587 | |
74e4d827 DS |
2588 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); |
2589 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); | |
cb517eab | 2590 | if (!tree_root || !chunk_root) { |
39279cc3 CM |
2591 | err = -ENOMEM; |
2592 | goto fail; | |
2593 | } | |
76dda93c YZ |
2594 | |
2595 | ret = init_srcu_struct(&fs_info->subvol_srcu); | |
2596 | if (ret) { | |
2597 | err = ret; | |
2598 | goto fail; | |
2599 | } | |
2600 | ||
2601 | ret = setup_bdi(fs_info, &fs_info->bdi); | |
2602 | if (ret) { | |
2603 | err = ret; | |
2604 | goto fail_srcu; | |
2605 | } | |
2606 | ||
908c7f19 | 2607 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL); |
e2d84521 MX |
2608 | if (ret) { |
2609 | err = ret; | |
2610 | goto fail_bdi; | |
2611 | } | |
09cbfeaf | 2612 | fs_info->dirty_metadata_batch = PAGE_SIZE * |
e2d84521 MX |
2613 | (1 + ilog2(nr_cpu_ids)); |
2614 | ||
908c7f19 | 2615 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL); |
963d678b MX |
2616 | if (ret) { |
2617 | err = ret; | |
2618 | goto fail_dirty_metadata_bytes; | |
2619 | } | |
2620 | ||
908c7f19 | 2621 | ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL); |
c404e0dc MX |
2622 | if (ret) { |
2623 | err = ret; | |
2624 | goto fail_delalloc_bytes; | |
2625 | } | |
2626 | ||
76dda93c YZ |
2627 | fs_info->btree_inode = new_inode(sb); |
2628 | if (!fs_info->btree_inode) { | |
2629 | err = -ENOMEM; | |
c404e0dc | 2630 | goto fail_bio_counter; |
76dda93c YZ |
2631 | } |
2632 | ||
a6591715 | 2633 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
1561deda | 2634 | |
76dda93c | 2635 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
f28491e0 | 2636 | INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); |
8fd17795 | 2637 | INIT_LIST_HEAD(&fs_info->trans_list); |
facda1e7 | 2638 | INIT_LIST_HEAD(&fs_info->dead_roots); |
24bbcf04 | 2639 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
eb73c1b7 | 2640 | INIT_LIST_HEAD(&fs_info->delalloc_roots); |
11833d66 | 2641 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
eb73c1b7 | 2642 | spin_lock_init(&fs_info->delalloc_root_lock); |
a4abeea4 | 2643 | spin_lock_init(&fs_info->trans_lock); |
76dda93c | 2644 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
24bbcf04 | 2645 | spin_lock_init(&fs_info->delayed_iput_lock); |
4cb5300b | 2646 | spin_lock_init(&fs_info->defrag_inodes_lock); |
2bf64758 | 2647 | spin_lock_init(&fs_info->free_chunk_lock); |
f29021b2 | 2648 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
ceda0864 | 2649 | spin_lock_init(&fs_info->super_lock); |
fcebe456 | 2650 | spin_lock_init(&fs_info->qgroup_op_lock); |
f28491e0 | 2651 | spin_lock_init(&fs_info->buffer_lock); |
47ab2a6c | 2652 | spin_lock_init(&fs_info->unused_bgs_lock); |
f29021b2 | 2653 | rwlock_init(&fs_info->tree_mod_log_lock); |
d7c15171 | 2654 | mutex_init(&fs_info->unused_bg_unpin_mutex); |
67c5e7d4 | 2655 | mutex_init(&fs_info->delete_unused_bgs_mutex); |
7585717f | 2656 | mutex_init(&fs_info->reloc_mutex); |
573bfb72 | 2657 | mutex_init(&fs_info->delalloc_root_mutex); |
c2d6cb16 | 2658 | mutex_init(&fs_info->cleaner_delayed_iput_mutex); |
de98ced9 | 2659 | seqlock_init(&fs_info->profiles_lock); |
19c00ddc | 2660 | |
0b86a832 | 2661 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
6324fbf3 | 2662 | INIT_LIST_HEAD(&fs_info->space_info); |
f29021b2 | 2663 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
47ab2a6c | 2664 | INIT_LIST_HEAD(&fs_info->unused_bgs); |
0b86a832 | 2665 | btrfs_mapping_init(&fs_info->mapping_tree); |
66d8f3dd MX |
2666 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
2667 | BTRFS_BLOCK_RSV_GLOBAL); | |
2668 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, | |
2669 | BTRFS_BLOCK_RSV_DELALLOC); | |
2670 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); | |
2671 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); | |
2672 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); | |
2673 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, | |
2674 | BTRFS_BLOCK_RSV_DELOPS); | |
cb03c743 | 2675 | atomic_set(&fs_info->nr_async_submits, 0); |
771ed689 | 2676 | atomic_set(&fs_info->async_delalloc_pages, 0); |
8c8bee1d | 2677 | atomic_set(&fs_info->async_submit_draining, 0); |
0986fe9e | 2678 | atomic_set(&fs_info->nr_async_bios, 0); |
4cb5300b | 2679 | atomic_set(&fs_info->defrag_running, 0); |
fcebe456 | 2680 | atomic_set(&fs_info->qgroup_op_seq, 0); |
2fefd558 | 2681 | atomic_set(&fs_info->reada_works_cnt, 0); |
fc36ed7e | 2682 | atomic64_set(&fs_info->tree_mod_seq, 0); |
9e7cc91a | 2683 | fs_info->fs_frozen = 0; |
e20d96d6 | 2684 | fs_info->sb = sb; |
95ac567a | 2685 | fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE; |
9ed74f2d | 2686 | fs_info->metadata_ratio = 0; |
4cb5300b | 2687 | fs_info->defrag_inodes = RB_ROOT; |
2bf64758 | 2688 | fs_info->free_chunk_space = 0; |
f29021b2 | 2689 | fs_info->tree_mod_log = RB_ROOT; |
8b87dc17 | 2690 | fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; |
f8c269d7 | 2691 | fs_info->avg_delayed_ref_runtime = NSEC_PER_SEC >> 6; /* div by 64 */ |
90519d66 | 2692 | /* readahead state */ |
d0164adc | 2693 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); |
90519d66 | 2694 | spin_lock_init(&fs_info->reada_lock); |
c8b97818 | 2695 | |
b34b086c CM |
2696 | fs_info->thread_pool_size = min_t(unsigned long, |
2697 | num_online_cpus() + 2, 8); | |
0afbaf8c | 2698 | |
199c2a9c MX |
2699 | INIT_LIST_HEAD(&fs_info->ordered_roots); |
2700 | spin_lock_init(&fs_info->ordered_root_lock); | |
16cdcec7 | 2701 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
74e4d827 | 2702 | GFP_KERNEL); |
16cdcec7 MX |
2703 | if (!fs_info->delayed_root) { |
2704 | err = -ENOMEM; | |
2705 | goto fail_iput; | |
2706 | } | |
2707 | btrfs_init_delayed_root(fs_info->delayed_root); | |
3eaa2885 | 2708 | |
638aa7ed | 2709 | btrfs_init_scrub(fs_info); |
21adbd5c SB |
2710 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2711 | fs_info->check_integrity_print_mask = 0; | |
2712 | #endif | |
779a65a4 | 2713 | btrfs_init_balance(fs_info); |
21c7e756 | 2714 | btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); |
a2de733c | 2715 | |
a061fc8d CM |
2716 | sb->s_blocksize = 4096; |
2717 | sb->s_blocksize_bits = blksize_bits(4096); | |
32a88aa1 | 2718 | sb->s_bdi = &fs_info->bdi; |
a061fc8d | 2719 | |
6bccf3ab | 2720 | btrfs_init_btree_inode(fs_info); |
76dda93c | 2721 | |
0f9dd46c | 2722 | spin_lock_init(&fs_info->block_group_cache_lock); |
6bef4d31 | 2723 | fs_info->block_group_cache_tree = RB_ROOT; |
a1897fdd | 2724 | fs_info->first_logical_byte = (u64)-1; |
0f9dd46c | 2725 | |
11833d66 | 2726 | extent_io_tree_init(&fs_info->freed_extents[0], |
f993c883 | 2727 | fs_info->btree_inode->i_mapping); |
11833d66 | 2728 | extent_io_tree_init(&fs_info->freed_extents[1], |
f993c883 | 2729 | fs_info->btree_inode->i_mapping); |
11833d66 | 2730 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
afcdd129 | 2731 | set_bit(BTRFS_FS_BARRIER, &fs_info->flags); |
39279cc3 | 2732 | |
5a3f23d5 | 2733 | mutex_init(&fs_info->ordered_operations_mutex); |
e02119d5 | 2734 | mutex_init(&fs_info->tree_log_mutex); |
925baedd | 2735 | mutex_init(&fs_info->chunk_mutex); |
a74a4b97 CM |
2736 | mutex_init(&fs_info->transaction_kthread_mutex); |
2737 | mutex_init(&fs_info->cleaner_mutex); | |
7d9eb12c | 2738 | mutex_init(&fs_info->volume_mutex); |
1bbc621e | 2739 | mutex_init(&fs_info->ro_block_group_mutex); |
9e351cc8 | 2740 | init_rwsem(&fs_info->commit_root_sem); |
c71bf099 | 2741 | init_rwsem(&fs_info->cleanup_work_sem); |
76dda93c | 2742 | init_rwsem(&fs_info->subvol_sem); |
803b2f54 | 2743 | sema_init(&fs_info->uuid_tree_rescan_sem, 1); |
fa9c0d79 | 2744 | |
ad618368 | 2745 | btrfs_init_dev_replace_locks(fs_info); |
f9e92e40 | 2746 | btrfs_init_qgroup(fs_info); |
416ac51d | 2747 | |
fa9c0d79 CM |
2748 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
2749 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); | |
2750 | ||
e6dcd2dc | 2751 | init_waitqueue_head(&fs_info->transaction_throttle); |
f9295749 | 2752 | init_waitqueue_head(&fs_info->transaction_wait); |
bb9c12c9 | 2753 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
4854ddd0 | 2754 | init_waitqueue_head(&fs_info->async_submit_wait); |
3768f368 | 2755 | |
04216820 FM |
2756 | INIT_LIST_HEAD(&fs_info->pinned_chunks); |
2757 | ||
da17066c JM |
2758 | /* Usable values until the real ones are cached from the superblock */ |
2759 | fs_info->nodesize = 4096; | |
2760 | fs_info->sectorsize = 4096; | |
2761 | fs_info->stripesize = 4096; | |
2762 | ||
53b381b3 DW |
2763 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
2764 | if (ret) { | |
83c8266a | 2765 | err = ret; |
53b381b3 DW |
2766 | goto fail_alloc; |
2767 | } | |
2768 | ||
da17066c | 2769 | __setup_root(tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); |
7eccb903 | 2770 | |
3c4bb26b | 2771 | invalidate_bdev(fs_devices->latest_bdev); |
1104a885 DS |
2772 | |
2773 | /* | |
2774 | * Read super block and check the signature bytes only | |
2775 | */ | |
a512bbf8 | 2776 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
92fc03fb AJ |
2777 | if (IS_ERR(bh)) { |
2778 | err = PTR_ERR(bh); | |
16cdcec7 | 2779 | goto fail_alloc; |
20b45077 | 2780 | } |
39279cc3 | 2781 | |
1104a885 DS |
2782 | /* |
2783 | * We want to check superblock checksum, the type is stored inside. | |
2784 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). | |
2785 | */ | |
ab8d0fc4 | 2786 | if (btrfs_check_super_csum(fs_info, bh->b_data)) { |
05135f59 | 2787 | btrfs_err(fs_info, "superblock checksum mismatch"); |
1104a885 | 2788 | err = -EINVAL; |
b2acdddf | 2789 | brelse(bh); |
1104a885 DS |
2790 | goto fail_alloc; |
2791 | } | |
2792 | ||
2793 | /* | |
2794 | * super_copy is zeroed at allocation time and we never touch the | |
2795 | * following bytes up to INFO_SIZE, the checksum is calculated from | |
2796 | * the whole block of INFO_SIZE | |
2797 | */ | |
6c41761f DS |
2798 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
2799 | memcpy(fs_info->super_for_commit, fs_info->super_copy, | |
2800 | sizeof(*fs_info->super_for_commit)); | |
a061fc8d | 2801 | brelse(bh); |
5f39d397 | 2802 | |
6c41761f | 2803 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
0b86a832 | 2804 | |
1104a885 DS |
2805 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
2806 | if (ret) { | |
05135f59 | 2807 | btrfs_err(fs_info, "superblock contains fatal errors"); |
1104a885 DS |
2808 | err = -EINVAL; |
2809 | goto fail_alloc; | |
2810 | } | |
2811 | ||
6c41761f | 2812 | disk_super = fs_info->super_copy; |
0f7d52f4 | 2813 | if (!btrfs_super_root(disk_super)) |
16cdcec7 | 2814 | goto fail_alloc; |
0f7d52f4 | 2815 | |
acce952b | 2816 | /* check FS state, whether FS is broken. */ |
87533c47 MX |
2817 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
2818 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); | |
acce952b | 2819 | |
af31f5e5 CM |
2820 | /* |
2821 | * run through our array of backup supers and setup | |
2822 | * our ring pointer to the oldest one | |
2823 | */ | |
2824 | generation = btrfs_super_generation(disk_super); | |
2825 | find_oldest_super_backup(fs_info, generation); | |
2826 | ||
75e7cb7f LB |
2827 | /* |
2828 | * In the long term, we'll store the compression type in the super | |
2829 | * block, and it'll be used for per file compression control. | |
2830 | */ | |
2831 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; | |
2832 | ||
2ff7e61e | 2833 | ret = btrfs_parse_options(fs_info, options, sb->s_flags); |
2b82032c YZ |
2834 | if (ret) { |
2835 | err = ret; | |
16cdcec7 | 2836 | goto fail_alloc; |
2b82032c | 2837 | } |
dfe25020 | 2838 | |
f2b636e8 JB |
2839 | features = btrfs_super_incompat_flags(disk_super) & |
2840 | ~BTRFS_FEATURE_INCOMPAT_SUPP; | |
2841 | if (features) { | |
05135f59 DS |
2842 | btrfs_err(fs_info, |
2843 | "cannot mount because of unsupported optional features (%llx)", | |
2844 | features); | |
f2b636e8 | 2845 | err = -EINVAL; |
16cdcec7 | 2846 | goto fail_alloc; |
f2b636e8 JB |
2847 | } |
2848 | ||
5d4f98a2 | 2849 | features = btrfs_super_incompat_flags(disk_super); |
a6fa6fae | 2850 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
0b246afa | 2851 | if (fs_info->compress_type == BTRFS_COMPRESS_LZO) |
a6fa6fae | 2852 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
727011e0 | 2853 | |
3173a18f | 2854 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
05135f59 | 2855 | btrfs_info(fs_info, "has skinny extents"); |
3173a18f | 2856 | |
727011e0 CM |
2857 | /* |
2858 | * flag our filesystem as having big metadata blocks if | |
2859 | * they are bigger than the page size | |
2860 | */ | |
09cbfeaf | 2861 | if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) { |
727011e0 | 2862 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) |
05135f59 DS |
2863 | btrfs_info(fs_info, |
2864 | "flagging fs with big metadata feature"); | |
727011e0 CM |
2865 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
2866 | } | |
2867 | ||
bc3f116f | 2868 | nodesize = btrfs_super_nodesize(disk_super); |
bc3f116f | 2869 | sectorsize = btrfs_super_sectorsize(disk_super); |
b7f67055 | 2870 | stripesize = sectorsize; |
707e8a07 | 2871 | fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids)); |
963d678b | 2872 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
bc3f116f | 2873 | |
da17066c JM |
2874 | /* Cache block sizes */ |
2875 | fs_info->nodesize = nodesize; | |
2876 | fs_info->sectorsize = sectorsize; | |
2877 | fs_info->stripesize = stripesize; | |
2878 | ||
bc3f116f CM |
2879 | /* |
2880 | * mixed block groups end up with duplicate but slightly offset | |
2881 | * extent buffers for the same range. It leads to corruptions | |
2882 | */ | |
2883 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && | |
707e8a07 | 2884 | (sectorsize != nodesize)) { |
05135f59 DS |
2885 | btrfs_err(fs_info, |
2886 | "unequal nodesize/sectorsize (%u != %u) are not allowed for mixed block groups", | |
2887 | nodesize, sectorsize); | |
bc3f116f CM |
2888 | goto fail_alloc; |
2889 | } | |
2890 | ||
ceda0864 MX |
2891 | /* |
2892 | * Needn't use the lock because there is no other task which will | |
2893 | * update the flag. | |
2894 | */ | |
a6fa6fae | 2895 | btrfs_set_super_incompat_flags(disk_super, features); |
5d4f98a2 | 2896 | |
f2b636e8 JB |
2897 | features = btrfs_super_compat_ro_flags(disk_super) & |
2898 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; | |
2899 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
05135f59 DS |
2900 | btrfs_err(fs_info, |
2901 | "cannot mount read-write because of unsupported optional features (%llx)", | |
c1c9ff7c | 2902 | features); |
f2b636e8 | 2903 | err = -EINVAL; |
16cdcec7 | 2904 | goto fail_alloc; |
f2b636e8 | 2905 | } |
61d92c32 | 2906 | |
5cdc7ad3 | 2907 | max_active = fs_info->thread_pool_size; |
61d92c32 | 2908 | |
2a458198 ES |
2909 | ret = btrfs_init_workqueues(fs_info, fs_devices); |
2910 | if (ret) { | |
2911 | err = ret; | |
0dc3b84a JB |
2912 | goto fail_sb_buffer; |
2913 | } | |
4543df7e | 2914 | |
4575c9cc | 2915 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
c8b97818 | 2916 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
09cbfeaf | 2917 | SZ_4M / PAGE_SIZE); |
4575c9cc | 2918 | |
a061fc8d CM |
2919 | sb->s_blocksize = sectorsize; |
2920 | sb->s_blocksize_bits = blksize_bits(sectorsize); | |
db94535d | 2921 | |
925baedd | 2922 | mutex_lock(&fs_info->chunk_mutex); |
6bccf3ab | 2923 | ret = btrfs_read_sys_array(fs_info); |
925baedd | 2924 | mutex_unlock(&fs_info->chunk_mutex); |
84eed90f | 2925 | if (ret) { |
05135f59 | 2926 | btrfs_err(fs_info, "failed to read the system array: %d", ret); |
5d4f98a2 | 2927 | goto fail_sb_buffer; |
84eed90f | 2928 | } |
0b86a832 | 2929 | |
84234f3a | 2930 | generation = btrfs_super_chunk_root_generation(disk_super); |
0b86a832 | 2931 | |
da17066c | 2932 | __setup_root(chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
0b86a832 | 2933 | |
2ff7e61e | 2934 | chunk_root->node = read_tree_block(fs_info, |
0b86a832 | 2935 | btrfs_super_chunk_root(disk_super), |
ce86cd59 | 2936 | generation); |
64c043de LB |
2937 | if (IS_ERR(chunk_root->node) || |
2938 | !extent_buffer_uptodate(chunk_root->node)) { | |
05135f59 | 2939 | btrfs_err(fs_info, "failed to read chunk root"); |
e5fffbac | 2940 | if (!IS_ERR(chunk_root->node)) |
2941 | free_extent_buffer(chunk_root->node); | |
95ab1f64 | 2942 | chunk_root->node = NULL; |
af31f5e5 | 2943 | goto fail_tree_roots; |
83121942 | 2944 | } |
5d4f98a2 YZ |
2945 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
2946 | chunk_root->commit_root = btrfs_root_node(chunk_root); | |
0b86a832 | 2947 | |
e17cade2 | 2948 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
b308bc2f | 2949 | btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); |
e17cade2 | 2950 | |
5b4aacef | 2951 | ret = btrfs_read_chunk_tree(fs_info); |
2b82032c | 2952 | if (ret) { |
05135f59 | 2953 | btrfs_err(fs_info, "failed to read chunk tree: %d", ret); |
af31f5e5 | 2954 | goto fail_tree_roots; |
2b82032c | 2955 | } |
0b86a832 | 2956 | |
8dabb742 SB |
2957 | /* |
2958 | * keep the device that is marked to be the target device for the | |
2959 | * dev_replace procedure | |
2960 | */ | |
9eaed21e | 2961 | btrfs_close_extra_devices(fs_devices, 0); |
dfe25020 | 2962 | |
a6b0d5c8 | 2963 | if (!fs_devices->latest_bdev) { |
05135f59 | 2964 | btrfs_err(fs_info, "failed to read devices"); |
a6b0d5c8 CM |
2965 | goto fail_tree_roots; |
2966 | } | |
2967 | ||
af31f5e5 | 2968 | retry_root_backup: |
84234f3a | 2969 | generation = btrfs_super_generation(disk_super); |
0b86a832 | 2970 | |
2ff7e61e | 2971 | tree_root->node = read_tree_block(fs_info, |
db94535d | 2972 | btrfs_super_root(disk_super), |
ce86cd59 | 2973 | generation); |
64c043de LB |
2974 | if (IS_ERR(tree_root->node) || |
2975 | !extent_buffer_uptodate(tree_root->node)) { | |
05135f59 | 2976 | btrfs_warn(fs_info, "failed to read tree root"); |
e5fffbac | 2977 | if (!IS_ERR(tree_root->node)) |
2978 | free_extent_buffer(tree_root->node); | |
95ab1f64 | 2979 | tree_root->node = NULL; |
af31f5e5 | 2980 | goto recovery_tree_root; |
83121942 | 2981 | } |
af31f5e5 | 2982 | |
5d4f98a2 YZ |
2983 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
2984 | tree_root->commit_root = btrfs_root_node(tree_root); | |
69e9c6c6 | 2985 | btrfs_set_root_refs(&tree_root->root_item, 1); |
db94535d | 2986 | |
f32e48e9 CR |
2987 | mutex_lock(&tree_root->objectid_mutex); |
2988 | ret = btrfs_find_highest_objectid(tree_root, | |
2989 | &tree_root->highest_objectid); | |
2990 | if (ret) { | |
2991 | mutex_unlock(&tree_root->objectid_mutex); | |
2992 | goto recovery_tree_root; | |
2993 | } | |
2994 | ||
2995 | ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID); | |
2996 | ||
2997 | mutex_unlock(&tree_root->objectid_mutex); | |
2998 | ||
6bccf3ab | 2999 | ret = btrfs_read_roots(fs_info); |
4bbcaa64 | 3000 | if (ret) |
af31f5e5 | 3001 | goto recovery_tree_root; |
f7a81ea4 | 3002 | |
8929ecfa YZ |
3003 | fs_info->generation = generation; |
3004 | fs_info->last_trans_committed = generation; | |
8929ecfa | 3005 | |
68310a5e ID |
3006 | ret = btrfs_recover_balance(fs_info); |
3007 | if (ret) { | |
05135f59 | 3008 | btrfs_err(fs_info, "failed to recover balance: %d", ret); |
68310a5e ID |
3009 | goto fail_block_groups; |
3010 | } | |
3011 | ||
733f4fbb SB |
3012 | ret = btrfs_init_dev_stats(fs_info); |
3013 | if (ret) { | |
05135f59 | 3014 | btrfs_err(fs_info, "failed to init dev_stats: %d", ret); |
733f4fbb SB |
3015 | goto fail_block_groups; |
3016 | } | |
3017 | ||
8dabb742 SB |
3018 | ret = btrfs_init_dev_replace(fs_info); |
3019 | if (ret) { | |
05135f59 | 3020 | btrfs_err(fs_info, "failed to init dev_replace: %d", ret); |
8dabb742 SB |
3021 | goto fail_block_groups; |
3022 | } | |
3023 | ||
9eaed21e | 3024 | btrfs_close_extra_devices(fs_devices, 1); |
8dabb742 | 3025 | |
b7c35e81 AJ |
3026 | ret = btrfs_sysfs_add_fsid(fs_devices, NULL); |
3027 | if (ret) { | |
05135f59 DS |
3028 | btrfs_err(fs_info, "failed to init sysfs fsid interface: %d", |
3029 | ret); | |
b7c35e81 AJ |
3030 | goto fail_block_groups; |
3031 | } | |
3032 | ||
3033 | ret = btrfs_sysfs_add_device(fs_devices); | |
3034 | if (ret) { | |
05135f59 DS |
3035 | btrfs_err(fs_info, "failed to init sysfs device interface: %d", |
3036 | ret); | |
b7c35e81 AJ |
3037 | goto fail_fsdev_sysfs; |
3038 | } | |
3039 | ||
96f3136e | 3040 | ret = btrfs_sysfs_add_mounted(fs_info); |
c59021f8 | 3041 | if (ret) { |
05135f59 | 3042 | btrfs_err(fs_info, "failed to init sysfs interface: %d", ret); |
b7c35e81 | 3043 | goto fail_fsdev_sysfs; |
c59021f8 | 3044 | } |
3045 | ||
c59021f8 | 3046 | ret = btrfs_init_space_info(fs_info); |
3047 | if (ret) { | |
05135f59 | 3048 | btrfs_err(fs_info, "failed to initialize space info: %d", ret); |
2365dd3c | 3049 | goto fail_sysfs; |
c59021f8 | 3050 | } |
3051 | ||
5b4aacef | 3052 | ret = btrfs_read_block_groups(fs_info); |
1b1d1f66 | 3053 | if (ret) { |
05135f59 | 3054 | btrfs_err(fs_info, "failed to read block groups: %d", ret); |
2365dd3c | 3055 | goto fail_sysfs; |
1b1d1f66 | 3056 | } |
5af3e8cc SB |
3057 | fs_info->num_tolerated_disk_barrier_failures = |
3058 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); | |
292fd7fc SB |
3059 | if (fs_info->fs_devices->missing_devices > |
3060 | fs_info->num_tolerated_disk_barrier_failures && | |
3061 | !(sb->s_flags & MS_RDONLY)) { | |
05135f59 DS |
3062 | btrfs_warn(fs_info, |
3063 | "missing devices (%llu) exceeds the limit (%d), writeable mount is not allowed", | |
78fa1770 ZL |
3064 | fs_info->fs_devices->missing_devices, |
3065 | fs_info->num_tolerated_disk_barrier_failures); | |
2365dd3c | 3066 | goto fail_sysfs; |
292fd7fc | 3067 | } |
9078a3e1 | 3068 | |
a74a4b97 CM |
3069 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
3070 | "btrfs-cleaner"); | |
57506d50 | 3071 | if (IS_ERR(fs_info->cleaner_kthread)) |
2365dd3c | 3072 | goto fail_sysfs; |
a74a4b97 CM |
3073 | |
3074 | fs_info->transaction_kthread = kthread_run(transaction_kthread, | |
3075 | tree_root, | |
3076 | "btrfs-transaction"); | |
57506d50 | 3077 | if (IS_ERR(fs_info->transaction_kthread)) |
3f157a2f | 3078 | goto fail_cleaner; |
a74a4b97 | 3079 | |
0b246afa JM |
3080 | if (!btrfs_test_opt(fs_info, SSD) && |
3081 | !btrfs_test_opt(fs_info, NOSSD) && | |
c289811c | 3082 | !fs_info->fs_devices->rotating) { |
05135f59 | 3083 | btrfs_info(fs_info, "detected SSD devices, enabling SSD mode"); |
c289811c CM |
3084 | btrfs_set_opt(fs_info->mount_opt, SSD); |
3085 | } | |
3086 | ||
572d9ab7 | 3087 | /* |
01327610 | 3088 | * Mount does not set all options immediately, we can do it now and do |
572d9ab7 DS |
3089 | * not have to wait for transaction commit |
3090 | */ | |
3091 | btrfs_apply_pending_changes(fs_info); | |
3818aea2 | 3092 | |
21adbd5c | 3093 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
0b246afa | 3094 | if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) { |
2ff7e61e | 3095 | ret = btrfsic_mount(fs_info, fs_devices, |
0b246afa | 3096 | btrfs_test_opt(fs_info, |
21adbd5c SB |
3097 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? |
3098 | 1 : 0, | |
3099 | fs_info->check_integrity_print_mask); | |
3100 | if (ret) | |
05135f59 DS |
3101 | btrfs_warn(fs_info, |
3102 | "failed to initialize integrity check module: %d", | |
3103 | ret); | |
21adbd5c SB |
3104 | } |
3105 | #endif | |
bcef60f2 AJ |
3106 | ret = btrfs_read_qgroup_config(fs_info); |
3107 | if (ret) | |
3108 | goto fail_trans_kthread; | |
21adbd5c | 3109 | |
96da0919 QW |
3110 | /* do not make disk changes in broken FS or nologreplay is given */ |
3111 | if (btrfs_super_log_root(disk_super) != 0 && | |
0b246afa | 3112 | !btrfs_test_opt(fs_info, NOLOGREPLAY)) { |
63443bf5 | 3113 | ret = btrfs_replay_log(fs_info, fs_devices); |
79787eaa | 3114 | if (ret) { |
63443bf5 | 3115 | err = ret; |
28c16cbb | 3116 | goto fail_qgroup; |
79787eaa | 3117 | } |
e02119d5 | 3118 | } |
1a40e23b | 3119 | |
6bccf3ab | 3120 | ret = btrfs_find_orphan_roots(fs_info); |
79787eaa | 3121 | if (ret) |
28c16cbb | 3122 | goto fail_qgroup; |
76dda93c | 3123 | |
7c2ca468 | 3124 | if (!(sb->s_flags & MS_RDONLY)) { |
d68fc57b | 3125 | ret = btrfs_cleanup_fs_roots(fs_info); |
44c44af2 | 3126 | if (ret) |
28c16cbb | 3127 | goto fail_qgroup; |
90c711ab ZB |
3128 | |
3129 | mutex_lock(&fs_info->cleaner_mutex); | |
5d4f98a2 | 3130 | ret = btrfs_recover_relocation(tree_root); |
90c711ab | 3131 | mutex_unlock(&fs_info->cleaner_mutex); |
d7ce5843 | 3132 | if (ret < 0) { |
05135f59 DS |
3133 | btrfs_warn(fs_info, "failed to recover relocation: %d", |
3134 | ret); | |
d7ce5843 | 3135 | err = -EINVAL; |
bcef60f2 | 3136 | goto fail_qgroup; |
d7ce5843 | 3137 | } |
7c2ca468 | 3138 | } |
1a40e23b | 3139 | |
3de4586c CM |
3140 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
3141 | location.type = BTRFS_ROOT_ITEM_KEY; | |
cb517eab | 3142 | location.offset = 0; |
3de4586c | 3143 | |
3de4586c | 3144 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
3140c9a3 DC |
3145 | if (IS_ERR(fs_info->fs_root)) { |
3146 | err = PTR_ERR(fs_info->fs_root); | |
bcef60f2 | 3147 | goto fail_qgroup; |
3140c9a3 | 3148 | } |
c289811c | 3149 | |
2b6ba629 ID |
3150 | if (sb->s_flags & MS_RDONLY) |
3151 | return 0; | |
59641015 | 3152 | |
f8d468a1 OS |
3153 | if (btrfs_test_opt(fs_info, CLEAR_CACHE) && |
3154 | btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { | |
6675df31 OS |
3155 | clear_free_space_tree = 1; |
3156 | } else if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && | |
3157 | !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE_VALID)) { | |
3158 | btrfs_warn(fs_info, "free space tree is invalid"); | |
3159 | clear_free_space_tree = 1; | |
3160 | } | |
3161 | ||
3162 | if (clear_free_space_tree) { | |
f8d468a1 OS |
3163 | btrfs_info(fs_info, "clearing free space tree"); |
3164 | ret = btrfs_clear_free_space_tree(fs_info); | |
3165 | if (ret) { | |
3166 | btrfs_warn(fs_info, | |
3167 | "failed to clear free space tree: %d", ret); | |
6bccf3ab | 3168 | close_ctree(fs_info); |
f8d468a1 OS |
3169 | return ret; |
3170 | } | |
3171 | } | |
3172 | ||
0b246afa | 3173 | if (btrfs_test_opt(fs_info, FREE_SPACE_TREE) && |
511711af | 3174 | !btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { |
05135f59 | 3175 | btrfs_info(fs_info, "creating free space tree"); |
511711af CM |
3176 | ret = btrfs_create_free_space_tree(fs_info); |
3177 | if (ret) { | |
05135f59 DS |
3178 | btrfs_warn(fs_info, |
3179 | "failed to create free space tree: %d", ret); | |
6bccf3ab | 3180 | close_ctree(fs_info); |
511711af CM |
3181 | return ret; |
3182 | } | |
3183 | } | |
3184 | ||
2b6ba629 ID |
3185 | down_read(&fs_info->cleanup_work_sem); |
3186 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || | |
3187 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { | |
e3acc2a6 | 3188 | up_read(&fs_info->cleanup_work_sem); |
6bccf3ab | 3189 | close_ctree(fs_info); |
2b6ba629 ID |
3190 | return ret; |
3191 | } | |
3192 | up_read(&fs_info->cleanup_work_sem); | |
59641015 | 3193 | |
2b6ba629 ID |
3194 | ret = btrfs_resume_balance_async(fs_info); |
3195 | if (ret) { | |
05135f59 | 3196 | btrfs_warn(fs_info, "failed to resume balance: %d", ret); |
6bccf3ab | 3197 | close_ctree(fs_info); |
2b6ba629 | 3198 | return ret; |
e3acc2a6 JB |
3199 | } |
3200 | ||
8dabb742 SB |
3201 | ret = btrfs_resume_dev_replace_async(fs_info); |
3202 | if (ret) { | |
05135f59 | 3203 | btrfs_warn(fs_info, "failed to resume device replace: %d", ret); |
6bccf3ab | 3204 | close_ctree(fs_info); |
8dabb742 SB |
3205 | return ret; |
3206 | } | |
3207 | ||
b382a324 JS |
3208 | btrfs_qgroup_rescan_resume(fs_info); |
3209 | ||
4bbcaa64 | 3210 | if (!fs_info->uuid_root) { |
05135f59 | 3211 | btrfs_info(fs_info, "creating UUID tree"); |
f7a81ea4 SB |
3212 | ret = btrfs_create_uuid_tree(fs_info); |
3213 | if (ret) { | |
05135f59 DS |
3214 | btrfs_warn(fs_info, |
3215 | "failed to create the UUID tree: %d", ret); | |
6bccf3ab | 3216 | close_ctree(fs_info); |
f7a81ea4 SB |
3217 | return ret; |
3218 | } | |
0b246afa | 3219 | } else if (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || |
4bbcaa64 ES |
3220 | fs_info->generation != |
3221 | btrfs_super_uuid_tree_generation(disk_super)) { | |
05135f59 | 3222 | btrfs_info(fs_info, "checking UUID tree"); |
70f80175 SB |
3223 | ret = btrfs_check_uuid_tree(fs_info); |
3224 | if (ret) { | |
05135f59 DS |
3225 | btrfs_warn(fs_info, |
3226 | "failed to check the UUID tree: %d", ret); | |
6bccf3ab | 3227 | close_ctree(fs_info); |
70f80175 SB |
3228 | return ret; |
3229 | } | |
3230 | } else { | |
afcdd129 | 3231 | set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags); |
f7a81ea4 | 3232 | } |
afcdd129 | 3233 | set_bit(BTRFS_FS_OPEN, &fs_info->flags); |
47ab2a6c | 3234 | |
8dcddfa0 QW |
3235 | /* |
3236 | * backuproot only affect mount behavior, and if open_ctree succeeded, | |
3237 | * no need to keep the flag | |
3238 | */ | |
3239 | btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); | |
3240 | ||
ad2b2c80 | 3241 | return 0; |
39279cc3 | 3242 | |
bcef60f2 AJ |
3243 | fail_qgroup: |
3244 | btrfs_free_qgroup_config(fs_info); | |
7c2ca468 CM |
3245 | fail_trans_kthread: |
3246 | kthread_stop(fs_info->transaction_kthread); | |
2ff7e61e | 3247 | btrfs_cleanup_transaction(fs_info); |
faa2dbf0 | 3248 | btrfs_free_fs_roots(fs_info); |
3f157a2f | 3249 | fail_cleaner: |
a74a4b97 | 3250 | kthread_stop(fs_info->cleaner_kthread); |
7c2ca468 CM |
3251 | |
3252 | /* | |
3253 | * make sure we're done with the btree inode before we stop our | |
3254 | * kthreads | |
3255 | */ | |
3256 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); | |
7c2ca468 | 3257 | |
2365dd3c | 3258 | fail_sysfs: |
6618a59b | 3259 | btrfs_sysfs_remove_mounted(fs_info); |
2365dd3c | 3260 | |
b7c35e81 AJ |
3261 | fail_fsdev_sysfs: |
3262 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); | |
3263 | ||
1b1d1f66 | 3264 | fail_block_groups: |
54067ae9 | 3265 | btrfs_put_block_group_cache(fs_info); |
1b1d1f66 | 3266 | btrfs_free_block_groups(fs_info); |
af31f5e5 CM |
3267 | |
3268 | fail_tree_roots: | |
3269 | free_root_pointers(fs_info, 1); | |
2b8195bb | 3270 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
af31f5e5 | 3271 | |
39279cc3 | 3272 | fail_sb_buffer: |
7abadb64 | 3273 | btrfs_stop_all_workers(fs_info); |
16cdcec7 | 3274 | fail_alloc: |
4543df7e | 3275 | fail_iput: |
586e46e2 ID |
3276 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
3277 | ||
4543df7e | 3278 | iput(fs_info->btree_inode); |
c404e0dc MX |
3279 | fail_bio_counter: |
3280 | percpu_counter_destroy(&fs_info->bio_counter); | |
963d678b MX |
3281 | fail_delalloc_bytes: |
3282 | percpu_counter_destroy(&fs_info->delalloc_bytes); | |
e2d84521 MX |
3283 | fail_dirty_metadata_bytes: |
3284 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); | |
ad081f14 | 3285 | fail_bdi: |
7e662854 | 3286 | bdi_destroy(&fs_info->bdi); |
76dda93c YZ |
3287 | fail_srcu: |
3288 | cleanup_srcu_struct(&fs_info->subvol_srcu); | |
7e662854 | 3289 | fail: |
53b381b3 | 3290 | btrfs_free_stripe_hash_table(fs_info); |
586e46e2 | 3291 | btrfs_close_devices(fs_info->fs_devices); |
ad2b2c80 | 3292 | return err; |
af31f5e5 CM |
3293 | |
3294 | recovery_tree_root: | |
0b246afa | 3295 | if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) |
af31f5e5 CM |
3296 | goto fail_tree_roots; |
3297 | ||
3298 | free_root_pointers(fs_info, 0); | |
3299 | ||
3300 | /* don't use the log in recovery mode, it won't be valid */ | |
3301 | btrfs_set_super_log_root(disk_super, 0); | |
3302 | ||
3303 | /* we can't trust the free space cache either */ | |
3304 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); | |
3305 | ||
3306 | ret = next_root_backup(fs_info, fs_info->super_copy, | |
3307 | &num_backups_tried, &backup_index); | |
3308 | if (ret == -1) | |
3309 | goto fail_block_groups; | |
3310 | goto retry_root_backup; | |
eb60ceac CM |
3311 | } |
3312 | ||
f2984462 CM |
3313 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
3314 | { | |
f2984462 CM |
3315 | if (uptodate) { |
3316 | set_buffer_uptodate(bh); | |
3317 | } else { | |
442a4f63 SB |
3318 | struct btrfs_device *device = (struct btrfs_device *) |
3319 | bh->b_private; | |
3320 | ||
fb456252 | 3321 | btrfs_warn_rl_in_rcu(device->fs_info, |
b14af3b4 | 3322 | "lost page write due to IO error on %s", |
606686ee | 3323 | rcu_str_deref(device->name)); |
01327610 | 3324 | /* note, we don't set_buffer_write_io_error because we have |
1259ab75 CM |
3325 | * our own ways of dealing with the IO errors |
3326 | */ | |
f2984462 | 3327 | clear_buffer_uptodate(bh); |
442a4f63 | 3328 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
f2984462 CM |
3329 | } |
3330 | unlock_buffer(bh); | |
3331 | put_bh(bh); | |
3332 | } | |
3333 | ||
29c36d72 AJ |
3334 | int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, |
3335 | struct buffer_head **bh_ret) | |
3336 | { | |
3337 | struct buffer_head *bh; | |
3338 | struct btrfs_super_block *super; | |
3339 | u64 bytenr; | |
3340 | ||
3341 | bytenr = btrfs_sb_offset(copy_num); | |
3342 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode)) | |
3343 | return -EINVAL; | |
3344 | ||
3345 | bh = __bread(bdev, bytenr / 4096, BTRFS_SUPER_INFO_SIZE); | |
3346 | /* | |
3347 | * If we fail to read from the underlying devices, as of now | |
3348 | * the best option we have is to mark it EIO. | |
3349 | */ | |
3350 | if (!bh) | |
3351 | return -EIO; | |
3352 | ||
3353 | super = (struct btrfs_super_block *)bh->b_data; | |
3354 | if (btrfs_super_bytenr(super) != bytenr || | |
3355 | btrfs_super_magic(super) != BTRFS_MAGIC) { | |
3356 | brelse(bh); | |
3357 | return -EINVAL; | |
3358 | } | |
3359 | ||
3360 | *bh_ret = bh; | |
3361 | return 0; | |
3362 | } | |
3363 | ||
3364 | ||
a512bbf8 YZ |
3365 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
3366 | { | |
3367 | struct buffer_head *bh; | |
3368 | struct buffer_head *latest = NULL; | |
3369 | struct btrfs_super_block *super; | |
3370 | int i; | |
3371 | u64 transid = 0; | |
92fc03fb | 3372 | int ret = -EINVAL; |
a512bbf8 YZ |
3373 | |
3374 | /* we would like to check all the supers, but that would make | |
3375 | * a btrfs mount succeed after a mkfs from a different FS. | |
3376 | * So, we need to add a special mount option to scan for | |
3377 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead | |
3378 | */ | |
3379 | for (i = 0; i < 1; i++) { | |
29c36d72 AJ |
3380 | ret = btrfs_read_dev_one_super(bdev, i, &bh); |
3381 | if (ret) | |
a512bbf8 YZ |
3382 | continue; |
3383 | ||
3384 | super = (struct btrfs_super_block *)bh->b_data; | |
a512bbf8 YZ |
3385 | |
3386 | if (!latest || btrfs_super_generation(super) > transid) { | |
3387 | brelse(latest); | |
3388 | latest = bh; | |
3389 | transid = btrfs_super_generation(super); | |
3390 | } else { | |
3391 | brelse(bh); | |
3392 | } | |
3393 | } | |
92fc03fb AJ |
3394 | |
3395 | if (!latest) | |
3396 | return ERR_PTR(ret); | |
3397 | ||
a512bbf8 YZ |
3398 | return latest; |
3399 | } | |
3400 | ||
4eedeb75 HH |
3401 | /* |
3402 | * this should be called twice, once with wait == 0 and | |
3403 | * once with wait == 1. When wait == 0 is done, all the buffer heads | |
3404 | * we write are pinned. | |
3405 | * | |
3406 | * They are released when wait == 1 is done. | |
3407 | * max_mirrors must be the same for both runs, and it indicates how | |
3408 | * many supers on this one device should be written. | |
3409 | * | |
3410 | * max_mirrors == 0 means to write them all. | |
3411 | */ | |
a512bbf8 YZ |
3412 | static int write_dev_supers(struct btrfs_device *device, |
3413 | struct btrfs_super_block *sb, | |
3414 | int do_barriers, int wait, int max_mirrors) | |
3415 | { | |
3416 | struct buffer_head *bh; | |
3417 | int i; | |
3418 | int ret; | |
3419 | int errors = 0; | |
3420 | u32 crc; | |
3421 | u64 bytenr; | |
a512bbf8 YZ |
3422 | |
3423 | if (max_mirrors == 0) | |
3424 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; | |
3425 | ||
a512bbf8 YZ |
3426 | for (i = 0; i < max_mirrors; i++) { |
3427 | bytenr = btrfs_sb_offset(i); | |
935e5cc9 MX |
3428 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
3429 | device->commit_total_bytes) | |
a512bbf8 YZ |
3430 | break; |
3431 | ||
3432 | if (wait) { | |
3433 | bh = __find_get_block(device->bdev, bytenr / 4096, | |
3434 | BTRFS_SUPER_INFO_SIZE); | |
634554dc JB |
3435 | if (!bh) { |
3436 | errors++; | |
3437 | continue; | |
3438 | } | |
a512bbf8 | 3439 | wait_on_buffer(bh); |
4eedeb75 HH |
3440 | if (!buffer_uptodate(bh)) |
3441 | errors++; | |
3442 | ||
3443 | /* drop our reference */ | |
3444 | brelse(bh); | |
3445 | ||
3446 | /* drop the reference from the wait == 0 run */ | |
3447 | brelse(bh); | |
3448 | continue; | |
a512bbf8 YZ |
3449 | } else { |
3450 | btrfs_set_super_bytenr(sb, bytenr); | |
3451 | ||
3452 | crc = ~(u32)0; | |
b0496686 | 3453 | crc = btrfs_csum_data((char *)sb + |
a512bbf8 YZ |
3454 | BTRFS_CSUM_SIZE, crc, |
3455 | BTRFS_SUPER_INFO_SIZE - | |
3456 | BTRFS_CSUM_SIZE); | |
3457 | btrfs_csum_final(crc, sb->csum); | |
3458 | ||
4eedeb75 HH |
3459 | /* |
3460 | * one reference for us, and we leave it for the | |
3461 | * caller | |
3462 | */ | |
a512bbf8 YZ |
3463 | bh = __getblk(device->bdev, bytenr / 4096, |
3464 | BTRFS_SUPER_INFO_SIZE); | |
634554dc | 3465 | if (!bh) { |
fb456252 | 3466 | btrfs_err(device->fs_info, |
f14d104d DS |
3467 | "couldn't get super buffer head for bytenr %llu", |
3468 | bytenr); | |
634554dc JB |
3469 | errors++; |
3470 | continue; | |
3471 | } | |
3472 | ||
a512bbf8 YZ |
3473 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
3474 | ||
4eedeb75 | 3475 | /* one reference for submit_bh */ |
a512bbf8 | 3476 | get_bh(bh); |
4eedeb75 HH |
3477 | |
3478 | set_buffer_uptodate(bh); | |
a512bbf8 YZ |
3479 | lock_buffer(bh); |
3480 | bh->b_end_io = btrfs_end_buffer_write_sync; | |
442a4f63 | 3481 | bh->b_private = device; |
a512bbf8 YZ |
3482 | } |
3483 | ||
387125fc CM |
3484 | /* |
3485 | * we fua the first super. The others we allow | |
3486 | * to go down lazy. | |
3487 | */ | |
e8117c26 | 3488 | if (i == 0) |
70fd7614 | 3489 | ret = btrfsic_submit_bh(REQ_OP_WRITE, REQ_FUA, bh); |
e8117c26 | 3490 | else |
70fd7614 | 3491 | ret = btrfsic_submit_bh(REQ_OP_WRITE, REQ_SYNC, bh); |
4eedeb75 | 3492 | if (ret) |
a512bbf8 | 3493 | errors++; |
a512bbf8 YZ |
3494 | } |
3495 | return errors < i ? 0 : -1; | |
3496 | } | |
3497 | ||
387125fc CM |
3498 | /* |
3499 | * endio for the write_dev_flush, this will wake anyone waiting | |
3500 | * for the barrier when it is done | |
3501 | */ | |
4246a0b6 | 3502 | static void btrfs_end_empty_barrier(struct bio *bio) |
387125fc | 3503 | { |
387125fc CM |
3504 | if (bio->bi_private) |
3505 | complete(bio->bi_private); | |
3506 | bio_put(bio); | |
3507 | } | |
3508 | ||
3509 | /* | |
3510 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are | |
3511 | * sent down. With wait == 1, it waits for the previous flush. | |
3512 | * | |
3513 | * any device where the flush fails with eopnotsupp are flagged as not-barrier | |
3514 | * capable | |
3515 | */ | |
3516 | static int write_dev_flush(struct btrfs_device *device, int wait) | |
3517 | { | |
3518 | struct bio *bio; | |
3519 | int ret = 0; | |
3520 | ||
3521 | if (device->nobarriers) | |
3522 | return 0; | |
3523 | ||
3524 | if (wait) { | |
3525 | bio = device->flush_bio; | |
3526 | if (!bio) | |
3527 | return 0; | |
3528 | ||
3529 | wait_for_completion(&device->flush_wait); | |
3530 | ||
4246a0b6 CH |
3531 | if (bio->bi_error) { |
3532 | ret = bio->bi_error; | |
5af3e8cc SB |
3533 | btrfs_dev_stat_inc_and_print(device, |
3534 | BTRFS_DEV_STAT_FLUSH_ERRS); | |
387125fc CM |
3535 | } |
3536 | ||
3537 | /* drop the reference from the wait == 0 run */ | |
3538 | bio_put(bio); | |
3539 | device->flush_bio = NULL; | |
3540 | ||
3541 | return ret; | |
3542 | } | |
3543 | ||
3544 | /* | |
3545 | * one reference for us, and we leave it for the | |
3546 | * caller | |
3547 | */ | |
9c017abc | 3548 | device->flush_bio = NULL; |
9be3395b | 3549 | bio = btrfs_io_bio_alloc(GFP_NOFS, 0); |
387125fc CM |
3550 | if (!bio) |
3551 | return -ENOMEM; | |
3552 | ||
3553 | bio->bi_end_io = btrfs_end_empty_barrier; | |
3554 | bio->bi_bdev = device->bdev; | |
70fd7614 | 3555 | bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
387125fc CM |
3556 | init_completion(&device->flush_wait); |
3557 | bio->bi_private = &device->flush_wait; | |
3558 | device->flush_bio = bio; | |
3559 | ||
3560 | bio_get(bio); | |
4e49ea4a | 3561 | btrfsic_submit_bio(bio); |
387125fc CM |
3562 | |
3563 | return 0; | |
3564 | } | |
3565 | ||
3566 | /* | |
3567 | * send an empty flush down to each device in parallel, | |
3568 | * then wait for them | |
3569 | */ | |
3570 | static int barrier_all_devices(struct btrfs_fs_info *info) | |
3571 | { | |
3572 | struct list_head *head; | |
3573 | struct btrfs_device *dev; | |
5af3e8cc SB |
3574 | int errors_send = 0; |
3575 | int errors_wait = 0; | |
387125fc CM |
3576 | int ret; |
3577 | ||
3578 | /* send down all the barriers */ | |
3579 | head = &info->fs_devices->devices; | |
3580 | list_for_each_entry_rcu(dev, head, dev_list) { | |
f88ba6a2 HS |
3581 | if (dev->missing) |
3582 | continue; | |
387125fc | 3583 | if (!dev->bdev) { |
5af3e8cc | 3584 | errors_send++; |
387125fc CM |
3585 | continue; |
3586 | } | |
3587 | if (!dev->in_fs_metadata || !dev->writeable) | |
3588 | continue; | |
3589 | ||
3590 | ret = write_dev_flush(dev, 0); | |
3591 | if (ret) | |
5af3e8cc | 3592 | errors_send++; |
387125fc CM |
3593 | } |
3594 | ||
3595 | /* wait for all the barriers */ | |
3596 | list_for_each_entry_rcu(dev, head, dev_list) { | |
f88ba6a2 HS |
3597 | if (dev->missing) |
3598 | continue; | |
387125fc | 3599 | if (!dev->bdev) { |
5af3e8cc | 3600 | errors_wait++; |
387125fc CM |
3601 | continue; |
3602 | } | |
3603 | if (!dev->in_fs_metadata || !dev->writeable) | |
3604 | continue; | |
3605 | ||
3606 | ret = write_dev_flush(dev, 1); | |
3607 | if (ret) | |
5af3e8cc | 3608 | errors_wait++; |
387125fc | 3609 | } |
5af3e8cc SB |
3610 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
3611 | errors_wait > info->num_tolerated_disk_barrier_failures) | |
387125fc CM |
3612 | return -EIO; |
3613 | return 0; | |
3614 | } | |
3615 | ||
943c6e99 ZL |
3616 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags) |
3617 | { | |
8789f4fe ZL |
3618 | int raid_type; |
3619 | int min_tolerated = INT_MAX; | |
943c6e99 | 3620 | |
8789f4fe ZL |
3621 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 || |
3622 | (flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE)) | |
3623 | min_tolerated = min(min_tolerated, | |
3624 | btrfs_raid_array[BTRFS_RAID_SINGLE]. | |
3625 | tolerated_failures); | |
943c6e99 | 3626 | |
8789f4fe ZL |
3627 | for (raid_type = 0; raid_type < BTRFS_NR_RAID_TYPES; raid_type++) { |
3628 | if (raid_type == BTRFS_RAID_SINGLE) | |
3629 | continue; | |
3630 | if (!(flags & btrfs_raid_group[raid_type])) | |
3631 | continue; | |
3632 | min_tolerated = min(min_tolerated, | |
3633 | btrfs_raid_array[raid_type]. | |
3634 | tolerated_failures); | |
3635 | } | |
943c6e99 | 3636 | |
8789f4fe | 3637 | if (min_tolerated == INT_MAX) { |
ab8d0fc4 | 3638 | pr_warn("BTRFS: unknown raid flag: %llu", flags); |
8789f4fe ZL |
3639 | min_tolerated = 0; |
3640 | } | |
3641 | ||
3642 | return min_tolerated; | |
943c6e99 ZL |
3643 | } |
3644 | ||
5af3e8cc SB |
3645 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
3646 | struct btrfs_fs_info *fs_info) | |
3647 | { | |
3648 | struct btrfs_ioctl_space_info space; | |
3649 | struct btrfs_space_info *sinfo; | |
3650 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, | |
3651 | BTRFS_BLOCK_GROUP_SYSTEM, | |
3652 | BTRFS_BLOCK_GROUP_METADATA, | |
3653 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; | |
5af3e8cc SB |
3654 | int i; |
3655 | int c; | |
3656 | int num_tolerated_disk_barrier_failures = | |
3657 | (int)fs_info->fs_devices->num_devices; | |
3658 | ||
2c458045 | 3659 | for (i = 0; i < ARRAY_SIZE(types); i++) { |
5af3e8cc SB |
3660 | struct btrfs_space_info *tmp; |
3661 | ||
3662 | sinfo = NULL; | |
3663 | rcu_read_lock(); | |
3664 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { | |
3665 | if (tmp->flags == types[i]) { | |
3666 | sinfo = tmp; | |
3667 | break; | |
3668 | } | |
3669 | } | |
3670 | rcu_read_unlock(); | |
3671 | ||
3672 | if (!sinfo) | |
3673 | continue; | |
3674 | ||
3675 | down_read(&sinfo->groups_sem); | |
3676 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { | |
2c458045 ZL |
3677 | u64 flags; |
3678 | ||
3679 | if (list_empty(&sinfo->block_groups[c])) | |
3680 | continue; | |
3681 | ||
3682 | btrfs_get_block_group_info(&sinfo->block_groups[c], | |
3683 | &space); | |
3684 | if (space.total_bytes == 0 || space.used_bytes == 0) | |
3685 | continue; | |
3686 | flags = space.flags; | |
943c6e99 ZL |
3687 | |
3688 | num_tolerated_disk_barrier_failures = min( | |
3689 | num_tolerated_disk_barrier_failures, | |
3690 | btrfs_get_num_tolerated_disk_barrier_failures( | |
3691 | flags)); | |
5af3e8cc SB |
3692 | } |
3693 | up_read(&sinfo->groups_sem); | |
3694 | } | |
3695 | ||
3696 | return num_tolerated_disk_barrier_failures; | |
3697 | } | |
3698 | ||
2ff7e61e | 3699 | static int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors) |
f2984462 | 3700 | { |
e5e9a520 | 3701 | struct list_head *head; |
f2984462 | 3702 | struct btrfs_device *dev; |
a061fc8d | 3703 | struct btrfs_super_block *sb; |
f2984462 | 3704 | struct btrfs_dev_item *dev_item; |
f2984462 CM |
3705 | int ret; |
3706 | int do_barriers; | |
a236aed1 CM |
3707 | int max_errors; |
3708 | int total_errors = 0; | |
a061fc8d | 3709 | u64 flags; |
f2984462 | 3710 | |
0b246afa JM |
3711 | do_barriers = !btrfs_test_opt(fs_info, NOBARRIER); |
3712 | backup_super_roots(fs_info); | |
f2984462 | 3713 | |
0b246afa | 3714 | sb = fs_info->super_for_commit; |
a061fc8d | 3715 | dev_item = &sb->dev_item; |
e5e9a520 | 3716 | |
0b246afa JM |
3717 | mutex_lock(&fs_info->fs_devices->device_list_mutex); |
3718 | head = &fs_info->fs_devices->devices; | |
3719 | max_errors = btrfs_super_num_devices(fs_info->super_copy) - 1; | |
387125fc | 3720 | |
5af3e8cc | 3721 | if (do_barriers) { |
0b246afa | 3722 | ret = barrier_all_devices(fs_info); |
5af3e8cc SB |
3723 | if (ret) { |
3724 | mutex_unlock( | |
0b246afa JM |
3725 | &fs_info->fs_devices->device_list_mutex); |
3726 | btrfs_handle_fs_error(fs_info, ret, | |
3727 | "errors while submitting device barriers."); | |
5af3e8cc SB |
3728 | return ret; |
3729 | } | |
3730 | } | |
387125fc | 3731 | |
1f78160c | 3732 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3733 | if (!dev->bdev) { |
3734 | total_errors++; | |
3735 | continue; | |
3736 | } | |
2b82032c | 3737 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3738 | continue; |
3739 | ||
2b82032c | 3740 | btrfs_set_stack_device_generation(dev_item, 0); |
a061fc8d CM |
3741 | btrfs_set_stack_device_type(dev_item, dev->type); |
3742 | btrfs_set_stack_device_id(dev_item, dev->devid); | |
7df69d3e | 3743 | btrfs_set_stack_device_total_bytes(dev_item, |
935e5cc9 | 3744 | dev->commit_total_bytes); |
ce7213c7 MX |
3745 | btrfs_set_stack_device_bytes_used(dev_item, |
3746 | dev->commit_bytes_used); | |
a061fc8d CM |
3747 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
3748 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); | |
3749 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); | |
3750 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); | |
2b82032c | 3751 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
a512bbf8 | 3752 | |
a061fc8d CM |
3753 | flags = btrfs_super_flags(sb); |
3754 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); | |
3755 | ||
a512bbf8 | 3756 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
a236aed1 CM |
3757 | if (ret) |
3758 | total_errors++; | |
f2984462 | 3759 | } |
a236aed1 | 3760 | if (total_errors > max_errors) { |
0b246afa JM |
3761 | btrfs_err(fs_info, "%d errors while writing supers", |
3762 | total_errors); | |
3763 | mutex_unlock(&fs_info->fs_devices->device_list_mutex); | |
79787eaa | 3764 | |
9d565ba4 | 3765 | /* FUA is masked off if unsupported and can't be the reason */ |
0b246afa JM |
3766 | btrfs_handle_fs_error(fs_info, -EIO, |
3767 | "%d errors while writing supers", | |
3768 | total_errors); | |
9d565ba4 | 3769 | return -EIO; |
a236aed1 | 3770 | } |
f2984462 | 3771 | |
a512bbf8 | 3772 | total_errors = 0; |
1f78160c | 3773 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3774 | if (!dev->bdev) |
3775 | continue; | |
2b82032c | 3776 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3777 | continue; |
3778 | ||
a512bbf8 YZ |
3779 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
3780 | if (ret) | |
3781 | total_errors++; | |
f2984462 | 3782 | } |
0b246afa | 3783 | mutex_unlock(&fs_info->fs_devices->device_list_mutex); |
a236aed1 | 3784 | if (total_errors > max_errors) { |
0b246afa JM |
3785 | btrfs_handle_fs_error(fs_info, -EIO, |
3786 | "%d errors while writing supers", | |
3787 | total_errors); | |
79787eaa | 3788 | return -EIO; |
a236aed1 | 3789 | } |
f2984462 CM |
3790 | return 0; |
3791 | } | |
3792 | ||
a512bbf8 | 3793 | int write_ctree_super(struct btrfs_trans_handle *trans, |
2ff7e61e | 3794 | struct btrfs_fs_info *fs_info, int max_mirrors) |
eb60ceac | 3795 | { |
2ff7e61e | 3796 | return write_all_supers(fs_info, max_mirrors); |
cfaa7295 CM |
3797 | } |
3798 | ||
cb517eab MX |
3799 | /* Drop a fs root from the radix tree and free it. */ |
3800 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, | |
3801 | struct btrfs_root *root) | |
2619ba1f | 3802 | { |
4df27c4d | 3803 | spin_lock(&fs_info->fs_roots_radix_lock); |
2619ba1f CM |
3804 | radix_tree_delete(&fs_info->fs_roots_radix, |
3805 | (unsigned long)root->root_key.objectid); | |
4df27c4d | 3806 | spin_unlock(&fs_info->fs_roots_radix_lock); |
76dda93c YZ |
3807 | |
3808 | if (btrfs_root_refs(&root->root_item) == 0) | |
3809 | synchronize_srcu(&fs_info->subvol_srcu); | |
3810 | ||
1c1ea4f7 | 3811 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
3321719e | 3812 | btrfs_free_log(NULL, root); |
1c1ea4f7 LB |
3813 | if (root->reloc_root) { |
3814 | free_extent_buffer(root->reloc_root->node); | |
3815 | free_extent_buffer(root->reloc_root->commit_root); | |
3816 | btrfs_put_fs_root(root->reloc_root); | |
3817 | root->reloc_root = NULL; | |
3818 | } | |
3819 | } | |
3321719e | 3820 | |
faa2dbf0 JB |
3821 | if (root->free_ino_pinned) |
3822 | __btrfs_remove_free_space_cache(root->free_ino_pinned); | |
3823 | if (root->free_ino_ctl) | |
3824 | __btrfs_remove_free_space_cache(root->free_ino_ctl); | |
4df27c4d | 3825 | free_fs_root(root); |
4df27c4d YZ |
3826 | } |
3827 | ||
3828 | static void free_fs_root(struct btrfs_root *root) | |
3829 | { | |
57cdc8db | 3830 | iput(root->ino_cache_inode); |
4df27c4d | 3831 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
2ff7e61e | 3832 | btrfs_free_block_rsv(root->fs_info, root->orphan_block_rsv); |
1cb048f5 | 3833 | root->orphan_block_rsv = NULL; |
0ee5dc67 AV |
3834 | if (root->anon_dev) |
3835 | free_anon_bdev(root->anon_dev); | |
8257b2dc MX |
3836 | if (root->subv_writers) |
3837 | btrfs_free_subvolume_writers(root->subv_writers); | |
4df27c4d YZ |
3838 | free_extent_buffer(root->node); |
3839 | free_extent_buffer(root->commit_root); | |
581bb050 LZ |
3840 | kfree(root->free_ino_ctl); |
3841 | kfree(root->free_ino_pinned); | |
d397712b | 3842 | kfree(root->name); |
b0feb9d9 | 3843 | btrfs_put_fs_root(root); |
2619ba1f CM |
3844 | } |
3845 | ||
cb517eab MX |
3846 | void btrfs_free_fs_root(struct btrfs_root *root) |
3847 | { | |
3848 | free_fs_root(root); | |
2619ba1f CM |
3849 | } |
3850 | ||
c146afad | 3851 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
cfaa7295 | 3852 | { |
c146afad YZ |
3853 | u64 root_objectid = 0; |
3854 | struct btrfs_root *gang[8]; | |
65d33fd7 QW |
3855 | int i = 0; |
3856 | int err = 0; | |
3857 | unsigned int ret = 0; | |
3858 | int index; | |
e089f05c | 3859 | |
c146afad | 3860 | while (1) { |
65d33fd7 | 3861 | index = srcu_read_lock(&fs_info->subvol_srcu); |
c146afad YZ |
3862 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
3863 | (void **)gang, root_objectid, | |
3864 | ARRAY_SIZE(gang)); | |
65d33fd7 QW |
3865 | if (!ret) { |
3866 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
c146afad | 3867 | break; |
65d33fd7 | 3868 | } |
5d4f98a2 | 3869 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
65d33fd7 | 3870 | |
c146afad | 3871 | for (i = 0; i < ret; i++) { |
65d33fd7 QW |
3872 | /* Avoid to grab roots in dead_roots */ |
3873 | if (btrfs_root_refs(&gang[i]->root_item) == 0) { | |
3874 | gang[i] = NULL; | |
3875 | continue; | |
3876 | } | |
3877 | /* grab all the search result for later use */ | |
3878 | gang[i] = btrfs_grab_fs_root(gang[i]); | |
3879 | } | |
3880 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
66b4ffd1 | 3881 | |
65d33fd7 QW |
3882 | for (i = 0; i < ret; i++) { |
3883 | if (!gang[i]) | |
3884 | continue; | |
c146afad | 3885 | root_objectid = gang[i]->root_key.objectid; |
66b4ffd1 JB |
3886 | err = btrfs_orphan_cleanup(gang[i]); |
3887 | if (err) | |
65d33fd7 QW |
3888 | break; |
3889 | btrfs_put_fs_root(gang[i]); | |
c146afad YZ |
3890 | } |
3891 | root_objectid++; | |
3892 | } | |
65d33fd7 QW |
3893 | |
3894 | /* release the uncleaned roots due to error */ | |
3895 | for (; i < ret; i++) { | |
3896 | if (gang[i]) | |
3897 | btrfs_put_fs_root(gang[i]); | |
3898 | } | |
3899 | return err; | |
c146afad | 3900 | } |
a2135011 | 3901 | |
6bccf3ab | 3902 | int btrfs_commit_super(struct btrfs_fs_info *fs_info) |
c146afad | 3903 | { |
6bccf3ab | 3904 | struct btrfs_root *root = fs_info->tree_root; |
c146afad | 3905 | struct btrfs_trans_handle *trans; |
a74a4b97 | 3906 | |
0b246afa | 3907 | mutex_lock(&fs_info->cleaner_mutex); |
2ff7e61e | 3908 | btrfs_run_delayed_iputs(fs_info); |
0b246afa JM |
3909 | mutex_unlock(&fs_info->cleaner_mutex); |
3910 | wake_up_process(fs_info->cleaner_kthread); | |
c71bf099 YZ |
3911 | |
3912 | /* wait until ongoing cleanup work done */ | |
0b246afa JM |
3913 | down_write(&fs_info->cleanup_work_sem); |
3914 | up_write(&fs_info->cleanup_work_sem); | |
c71bf099 | 3915 | |
7a7eaa40 | 3916 | trans = btrfs_join_transaction(root); |
3612b495 TI |
3917 | if (IS_ERR(trans)) |
3918 | return PTR_ERR(trans); | |
3a45bb20 | 3919 | return btrfs_commit_transaction(trans); |
c146afad YZ |
3920 | } |
3921 | ||
6bccf3ab | 3922 | void close_ctree(struct btrfs_fs_info *fs_info) |
c146afad | 3923 | { |
6bccf3ab | 3924 | struct btrfs_root *root = fs_info->tree_root; |
c146afad YZ |
3925 | int ret; |
3926 | ||
afcdd129 | 3927 | set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags); |
c146afad | 3928 | |
7343dd61 | 3929 | /* wait for the qgroup rescan worker to stop */ |
d06f23d6 | 3930 | btrfs_qgroup_wait_for_completion(fs_info, false); |
7343dd61 | 3931 | |
803b2f54 SB |
3932 | /* wait for the uuid_scan task to finish */ |
3933 | down(&fs_info->uuid_tree_rescan_sem); | |
3934 | /* avoid complains from lockdep et al., set sem back to initial state */ | |
3935 | up(&fs_info->uuid_tree_rescan_sem); | |
3936 | ||
837d5b6e | 3937 | /* pause restriper - we want to resume on mount */ |
aa1b8cd4 | 3938 | btrfs_pause_balance(fs_info); |
837d5b6e | 3939 | |
8dabb742 SB |
3940 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
3941 | ||
aa1b8cd4 | 3942 | btrfs_scrub_cancel(fs_info); |
4cb5300b CM |
3943 | |
3944 | /* wait for any defraggers to finish */ | |
3945 | wait_event(fs_info->transaction_wait, | |
3946 | (atomic_read(&fs_info->defrag_running) == 0)); | |
3947 | ||
3948 | /* clear out the rbtree of defraggable inodes */ | |
26176e7c | 3949 | btrfs_cleanup_defrag_inodes(fs_info); |
4cb5300b | 3950 | |
21c7e756 MX |
3951 | cancel_work_sync(&fs_info->async_reclaim_work); |
3952 | ||
c146afad | 3953 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
e44163e1 JM |
3954 | /* |
3955 | * If the cleaner thread is stopped and there are | |
3956 | * block groups queued for removal, the deletion will be | |
3957 | * skipped when we quit the cleaner thread. | |
3958 | */ | |
0b246afa | 3959 | btrfs_delete_unused_bgs(fs_info); |
e44163e1 | 3960 | |
6bccf3ab | 3961 | ret = btrfs_commit_super(fs_info); |
acce952b | 3962 | if (ret) |
04892340 | 3963 | btrfs_err(fs_info, "commit super ret %d", ret); |
acce952b | 3964 | } |
3965 | ||
87533c47 | 3966 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
2ff7e61e | 3967 | btrfs_error_commit_super(fs_info); |
0f7d52f4 | 3968 | |
e3029d9f AV |
3969 | kthread_stop(fs_info->transaction_kthread); |
3970 | kthread_stop(fs_info->cleaner_kthread); | |
8929ecfa | 3971 | |
afcdd129 | 3972 | set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags); |
f25784b3 | 3973 | |
04892340 | 3974 | btrfs_free_qgroup_config(fs_info); |
bcef60f2 | 3975 | |
963d678b | 3976 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
04892340 | 3977 | btrfs_info(fs_info, "at unmount delalloc count %lld", |
963d678b | 3978 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
b0c68f8b | 3979 | } |
bcc63abb | 3980 | |
6618a59b | 3981 | btrfs_sysfs_remove_mounted(fs_info); |
b7c35e81 | 3982 | btrfs_sysfs_remove_fsid(fs_info->fs_devices); |
5ac1d209 | 3983 | |
faa2dbf0 | 3984 | btrfs_free_fs_roots(fs_info); |
d10c5f31 | 3985 | |
1a4319cc LB |
3986 | btrfs_put_block_group_cache(fs_info); |
3987 | ||
2b1360da JB |
3988 | btrfs_free_block_groups(fs_info); |
3989 | ||
de348ee0 WS |
3990 | /* |
3991 | * we must make sure there is not any read request to | |
3992 | * submit after we stopping all workers. | |
3993 | */ | |
3994 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); | |
96192499 JB |
3995 | btrfs_stop_all_workers(fs_info); |
3996 | ||
afcdd129 | 3997 | clear_bit(BTRFS_FS_OPEN, &fs_info->flags); |
13e6c37b | 3998 | free_root_pointers(fs_info, 1); |
9ad6b7bc | 3999 | |
13e6c37b | 4000 | iput(fs_info->btree_inode); |
d6bfde87 | 4001 | |
21adbd5c | 4002 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
0b246afa | 4003 | if (btrfs_test_opt(fs_info, CHECK_INTEGRITY)) |
2ff7e61e | 4004 | btrfsic_unmount(fs_info->fs_devices); |
21adbd5c SB |
4005 | #endif |
4006 | ||
dfe25020 | 4007 | btrfs_close_devices(fs_info->fs_devices); |
0b86a832 | 4008 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
b248a415 | 4009 | |
e2d84521 | 4010 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
963d678b | 4011 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
c404e0dc | 4012 | percpu_counter_destroy(&fs_info->bio_counter); |
04160088 | 4013 | bdi_destroy(&fs_info->bdi); |
76dda93c | 4014 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
0b86a832 | 4015 | |
53b381b3 DW |
4016 | btrfs_free_stripe_hash_table(fs_info); |
4017 | ||
cdfb080e | 4018 | __btrfs_free_block_rsv(root->orphan_block_rsv); |
1cb048f5 | 4019 | root->orphan_block_rsv = NULL; |
04216820 | 4020 | |
34441361 | 4021 | mutex_lock(&fs_info->chunk_mutex); |
04216820 FM |
4022 | while (!list_empty(&fs_info->pinned_chunks)) { |
4023 | struct extent_map *em; | |
4024 | ||
4025 | em = list_first_entry(&fs_info->pinned_chunks, | |
4026 | struct extent_map, list); | |
4027 | list_del_init(&em->list); | |
4028 | free_extent_map(em); | |
4029 | } | |
34441361 | 4030 | mutex_unlock(&fs_info->chunk_mutex); |
eb60ceac CM |
4031 | } |
4032 | ||
b9fab919 CM |
4033 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
4034 | int atomic) | |
5f39d397 | 4035 | { |
1259ab75 | 4036 | int ret; |
727011e0 | 4037 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
1259ab75 | 4038 | |
0b32f4bb | 4039 | ret = extent_buffer_uptodate(buf); |
1259ab75 CM |
4040 | if (!ret) |
4041 | return ret; | |
4042 | ||
4043 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, | |
b9fab919 CM |
4044 | parent_transid, atomic); |
4045 | if (ret == -EAGAIN) | |
4046 | return ret; | |
1259ab75 | 4047 | return !ret; |
5f39d397 CM |
4048 | } |
4049 | ||
5f39d397 CM |
4050 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
4051 | { | |
0b246afa | 4052 | struct btrfs_fs_info *fs_info; |
06ea65a3 | 4053 | struct btrfs_root *root; |
5f39d397 | 4054 | u64 transid = btrfs_header_generation(buf); |
b9473439 | 4055 | int was_dirty; |
b4ce94de | 4056 | |
06ea65a3 JB |
4057 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
4058 | /* | |
4059 | * This is a fast path so only do this check if we have sanity tests | |
4060 | * enabled. Normal people shouldn't be marking dummy buffers as dirty | |
4061 | * outside of the sanity tests. | |
4062 | */ | |
4063 | if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) | |
4064 | return; | |
4065 | #endif | |
4066 | root = BTRFS_I(buf->pages[0]->mapping->host)->root; | |
0b246afa | 4067 | fs_info = root->fs_info; |
b9447ef8 | 4068 | btrfs_assert_tree_locked(buf); |
0b246afa | 4069 | if (transid != fs_info->generation) |
5d163e0e | 4070 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n", |
0b246afa | 4071 | buf->start, transid, fs_info->generation); |
0b32f4bb | 4072 | was_dirty = set_extent_buffer_dirty(buf); |
e2d84521 | 4073 | if (!was_dirty) |
0b246afa | 4074 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
e2d84521 | 4075 | buf->len, |
0b246afa | 4076 | fs_info->dirty_metadata_batch); |
1f21ef0a FM |
4077 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
4078 | if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { | |
2ff7e61e | 4079 | btrfs_print_leaf(fs_info, buf); |
1f21ef0a FM |
4080 | ASSERT(0); |
4081 | } | |
4082 | #endif | |
eb60ceac CM |
4083 | } |
4084 | ||
2ff7e61e | 4085 | static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info, |
b53d3f5d | 4086 | int flush_delayed) |
16cdcec7 MX |
4087 | { |
4088 | /* | |
4089 | * looks as though older kernels can get into trouble with | |
4090 | * this code, they end up stuck in balance_dirty_pages forever | |
4091 | */ | |
e2d84521 | 4092 | int ret; |
16cdcec7 MX |
4093 | |
4094 | if (current->flags & PF_MEMALLOC) | |
4095 | return; | |
4096 | ||
b53d3f5d | 4097 | if (flush_delayed) |
2ff7e61e | 4098 | btrfs_balance_delayed_items(fs_info); |
16cdcec7 | 4099 | |
0b246afa | 4100 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
e2d84521 MX |
4101 | BTRFS_DIRTY_METADATA_THRESH); |
4102 | if (ret > 0) { | |
0b246afa | 4103 | balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping); |
16cdcec7 | 4104 | } |
16cdcec7 MX |
4105 | } |
4106 | ||
2ff7e61e | 4107 | void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info) |
35b7e476 | 4108 | { |
2ff7e61e | 4109 | __btrfs_btree_balance_dirty(fs_info, 1); |
b53d3f5d | 4110 | } |
585ad2c3 | 4111 | |
2ff7e61e | 4112 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info) |
b53d3f5d | 4113 | { |
2ff7e61e | 4114 | __btrfs_btree_balance_dirty(fs_info, 0); |
35b7e476 | 4115 | } |
6b80053d | 4116 | |
ca7a79ad | 4117 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
6b80053d | 4118 | { |
727011e0 | 4119 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
2ff7e61e JM |
4120 | struct btrfs_fs_info *fs_info = root->fs_info; |
4121 | ||
4122 | return btree_read_extent_buffer_pages(fs_info, buf, parent_transid); | |
6b80053d | 4123 | } |
0da5468f | 4124 | |
fcd1f065 | 4125 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 4126 | int read_only) |
4127 | { | |
c926093e | 4128 | struct btrfs_super_block *sb = fs_info->super_copy; |
319e4d06 QW |
4129 | u64 nodesize = btrfs_super_nodesize(sb); |
4130 | u64 sectorsize = btrfs_super_sectorsize(sb); | |
c926093e DS |
4131 | int ret = 0; |
4132 | ||
319e4d06 | 4133 | if (btrfs_super_magic(sb) != BTRFS_MAGIC) { |
ab8d0fc4 | 4134 | btrfs_err(fs_info, "no valid FS found"); |
319e4d06 QW |
4135 | ret = -EINVAL; |
4136 | } | |
4137 | if (btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP) | |
ab8d0fc4 | 4138 | btrfs_warn(fs_info, "unrecognized super flag: %llu", |
319e4d06 | 4139 | btrfs_super_flags(sb) & ~BTRFS_SUPER_FLAG_SUPP); |
21e7626b | 4140 | if (btrfs_super_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 4141 | btrfs_err(fs_info, "tree_root level too big: %d >= %d", |
21e7626b | 4142 | btrfs_super_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
4143 | ret = -EINVAL; |
4144 | } | |
21e7626b | 4145 | if (btrfs_super_chunk_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 4146 | btrfs_err(fs_info, "chunk_root level too big: %d >= %d", |
21e7626b | 4147 | btrfs_super_chunk_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
4148 | ret = -EINVAL; |
4149 | } | |
21e7626b | 4150 | if (btrfs_super_log_root_level(sb) >= BTRFS_MAX_LEVEL) { |
ab8d0fc4 | 4151 | btrfs_err(fs_info, "log_root level too big: %d >= %d", |
21e7626b | 4152 | btrfs_super_log_root_level(sb), BTRFS_MAX_LEVEL); |
c926093e DS |
4153 | ret = -EINVAL; |
4154 | } | |
4155 | ||
1104a885 | 4156 | /* |
319e4d06 QW |
4157 | * Check sectorsize and nodesize first, other check will need it. |
4158 | * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. | |
1104a885 | 4159 | */ |
319e4d06 QW |
4160 | if (!is_power_of_2(sectorsize) || sectorsize < 4096 || |
4161 | sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
ab8d0fc4 | 4162 | btrfs_err(fs_info, "invalid sectorsize %llu", sectorsize); |
319e4d06 QW |
4163 | ret = -EINVAL; |
4164 | } | |
4165 | /* Only PAGE SIZE is supported yet */ | |
09cbfeaf | 4166 | if (sectorsize != PAGE_SIZE) { |
ab8d0fc4 JM |
4167 | btrfs_err(fs_info, |
4168 | "sectorsize %llu not supported yet, only support %lu", | |
4169 | sectorsize, PAGE_SIZE); | |
319e4d06 QW |
4170 | ret = -EINVAL; |
4171 | } | |
4172 | if (!is_power_of_2(nodesize) || nodesize < sectorsize || | |
4173 | nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
ab8d0fc4 | 4174 | btrfs_err(fs_info, "invalid nodesize %llu", nodesize); |
319e4d06 QW |
4175 | ret = -EINVAL; |
4176 | } | |
4177 | if (nodesize != le32_to_cpu(sb->__unused_leafsize)) { | |
ab8d0fc4 JM |
4178 | btrfs_err(fs_info, "invalid leafsize %u, should be %llu", |
4179 | le32_to_cpu(sb->__unused_leafsize), nodesize); | |
319e4d06 QW |
4180 | ret = -EINVAL; |
4181 | } | |
4182 | ||
4183 | /* Root alignment check */ | |
4184 | if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) { | |
ab8d0fc4 JM |
4185 | btrfs_warn(fs_info, "tree_root block unaligned: %llu", |
4186 | btrfs_super_root(sb)); | |
319e4d06 QW |
4187 | ret = -EINVAL; |
4188 | } | |
4189 | if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) { | |
ab8d0fc4 JM |
4190 | btrfs_warn(fs_info, "chunk_root block unaligned: %llu", |
4191 | btrfs_super_chunk_root(sb)); | |
75d6ad38 DS |
4192 | ret = -EINVAL; |
4193 | } | |
319e4d06 | 4194 | if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { |
ab8d0fc4 JM |
4195 | btrfs_warn(fs_info, "log_root block unaligned: %llu", |
4196 | btrfs_super_log_root(sb)); | |
75d6ad38 DS |
4197 | ret = -EINVAL; |
4198 | } | |
4199 | ||
c926093e | 4200 | if (memcmp(fs_info->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { |
ab8d0fc4 JM |
4201 | btrfs_err(fs_info, |
4202 | "dev_item UUID does not match fsid: %pU != %pU", | |
4203 | fs_info->fsid, sb->dev_item.fsid); | |
c926093e DS |
4204 | ret = -EINVAL; |
4205 | } | |
4206 | ||
4207 | /* | |
4208 | * Hint to catch really bogus numbers, bitflips or so, more exact checks are | |
4209 | * done later | |
4210 | */ | |
99e3ecfc LB |
4211 | if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) { |
4212 | btrfs_err(fs_info, "bytes_used is too small %llu", | |
ab8d0fc4 | 4213 | btrfs_super_bytes_used(sb)); |
99e3ecfc LB |
4214 | ret = -EINVAL; |
4215 | } | |
b7f67055 | 4216 | if (!is_power_of_2(btrfs_super_stripesize(sb))) { |
99e3ecfc | 4217 | btrfs_err(fs_info, "invalid stripesize %u", |
ab8d0fc4 | 4218 | btrfs_super_stripesize(sb)); |
99e3ecfc LB |
4219 | ret = -EINVAL; |
4220 | } | |
21e7626b | 4221 | if (btrfs_super_num_devices(sb) > (1UL << 31)) |
ab8d0fc4 JM |
4222 | btrfs_warn(fs_info, "suspicious number of devices: %llu", |
4223 | btrfs_super_num_devices(sb)); | |
75d6ad38 | 4224 | if (btrfs_super_num_devices(sb) == 0) { |
ab8d0fc4 | 4225 | btrfs_err(fs_info, "number of devices is 0"); |
75d6ad38 DS |
4226 | ret = -EINVAL; |
4227 | } | |
c926093e | 4228 | |
21e7626b | 4229 | if (btrfs_super_bytenr(sb) != BTRFS_SUPER_INFO_OFFSET) { |
ab8d0fc4 JM |
4230 | btrfs_err(fs_info, "super offset mismatch %llu != %u", |
4231 | btrfs_super_bytenr(sb), BTRFS_SUPER_INFO_OFFSET); | |
c926093e DS |
4232 | ret = -EINVAL; |
4233 | } | |
4234 | ||
ce7fca5f DS |
4235 | /* |
4236 | * Obvious sys_chunk_array corruptions, it must hold at least one key | |
4237 | * and one chunk | |
4238 | */ | |
4239 | if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) { | |
ab8d0fc4 JM |
4240 | btrfs_err(fs_info, "system chunk array too big %u > %u", |
4241 | btrfs_super_sys_array_size(sb), | |
4242 | BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); | |
ce7fca5f DS |
4243 | ret = -EINVAL; |
4244 | } | |
4245 | if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key) | |
4246 | + sizeof(struct btrfs_chunk)) { | |
ab8d0fc4 JM |
4247 | btrfs_err(fs_info, "system chunk array too small %u < %zu", |
4248 | btrfs_super_sys_array_size(sb), | |
4249 | sizeof(struct btrfs_disk_key) | |
4250 | + sizeof(struct btrfs_chunk)); | |
ce7fca5f DS |
4251 | ret = -EINVAL; |
4252 | } | |
4253 | ||
c926093e DS |
4254 | /* |
4255 | * The generation is a global counter, we'll trust it more than the others | |
4256 | * but it's still possible that it's the one that's wrong. | |
4257 | */ | |
21e7626b | 4258 | if (btrfs_super_generation(sb) < btrfs_super_chunk_root_generation(sb)) |
ab8d0fc4 JM |
4259 | btrfs_warn(fs_info, |
4260 | "suspicious: generation < chunk_root_generation: %llu < %llu", | |
4261 | btrfs_super_generation(sb), | |
4262 | btrfs_super_chunk_root_generation(sb)); | |
21e7626b DS |
4263 | if (btrfs_super_generation(sb) < btrfs_super_cache_generation(sb) |
4264 | && btrfs_super_cache_generation(sb) != (u64)-1) | |
ab8d0fc4 JM |
4265 | btrfs_warn(fs_info, |
4266 | "suspicious: generation < cache_generation: %llu < %llu", | |
4267 | btrfs_super_generation(sb), | |
4268 | btrfs_super_cache_generation(sb)); | |
c926093e DS |
4269 | |
4270 | return ret; | |
acce952b | 4271 | } |
4272 | ||
2ff7e61e | 4273 | static void btrfs_error_commit_super(struct btrfs_fs_info *fs_info) |
acce952b | 4274 | { |
0b246afa | 4275 | mutex_lock(&fs_info->cleaner_mutex); |
2ff7e61e | 4276 | btrfs_run_delayed_iputs(fs_info); |
0b246afa | 4277 | mutex_unlock(&fs_info->cleaner_mutex); |
acce952b | 4278 | |
0b246afa JM |
4279 | down_write(&fs_info->cleanup_work_sem); |
4280 | up_write(&fs_info->cleanup_work_sem); | |
acce952b | 4281 | |
4282 | /* cleanup FS via transaction */ | |
2ff7e61e | 4283 | btrfs_cleanup_transaction(fs_info); |
acce952b | 4284 | } |
4285 | ||
143bede5 | 4286 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
acce952b | 4287 | { |
acce952b | 4288 | struct btrfs_ordered_extent *ordered; |
acce952b | 4289 | |
199c2a9c | 4290 | spin_lock(&root->ordered_extent_lock); |
779880ef JB |
4291 | /* |
4292 | * This will just short circuit the ordered completion stuff which will | |
4293 | * make sure the ordered extent gets properly cleaned up. | |
4294 | */ | |
199c2a9c | 4295 | list_for_each_entry(ordered, &root->ordered_extents, |
779880ef JB |
4296 | root_extent_list) |
4297 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); | |
199c2a9c MX |
4298 | spin_unlock(&root->ordered_extent_lock); |
4299 | } | |
4300 | ||
4301 | static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) | |
4302 | { | |
4303 | struct btrfs_root *root; | |
4304 | struct list_head splice; | |
4305 | ||
4306 | INIT_LIST_HEAD(&splice); | |
4307 | ||
4308 | spin_lock(&fs_info->ordered_root_lock); | |
4309 | list_splice_init(&fs_info->ordered_roots, &splice); | |
4310 | while (!list_empty(&splice)) { | |
4311 | root = list_first_entry(&splice, struct btrfs_root, | |
4312 | ordered_root); | |
1de2cfde JB |
4313 | list_move_tail(&root->ordered_root, |
4314 | &fs_info->ordered_roots); | |
199c2a9c | 4315 | |
2a85d9ca | 4316 | spin_unlock(&fs_info->ordered_root_lock); |
199c2a9c MX |
4317 | btrfs_destroy_ordered_extents(root); |
4318 | ||
2a85d9ca LB |
4319 | cond_resched(); |
4320 | spin_lock(&fs_info->ordered_root_lock); | |
199c2a9c MX |
4321 | } |
4322 | spin_unlock(&fs_info->ordered_root_lock); | |
acce952b | 4323 | } |
4324 | ||
35a3621b | 4325 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
2ff7e61e | 4326 | struct btrfs_fs_info *fs_info) |
acce952b | 4327 | { |
4328 | struct rb_node *node; | |
4329 | struct btrfs_delayed_ref_root *delayed_refs; | |
4330 | struct btrfs_delayed_ref_node *ref; | |
4331 | int ret = 0; | |
4332 | ||
4333 | delayed_refs = &trans->delayed_refs; | |
4334 | ||
4335 | spin_lock(&delayed_refs->lock); | |
d7df2c79 | 4336 | if (atomic_read(&delayed_refs->num_entries) == 0) { |
cfece4db | 4337 | spin_unlock(&delayed_refs->lock); |
0b246afa | 4338 | btrfs_info(fs_info, "delayed_refs has NO entry"); |
acce952b | 4339 | return ret; |
4340 | } | |
4341 | ||
d7df2c79 JB |
4342 | while ((node = rb_first(&delayed_refs->href_root)) != NULL) { |
4343 | struct btrfs_delayed_ref_head *head; | |
c6fc2454 | 4344 | struct btrfs_delayed_ref_node *tmp; |
e78417d1 | 4345 | bool pin_bytes = false; |
acce952b | 4346 | |
d7df2c79 JB |
4347 | head = rb_entry(node, struct btrfs_delayed_ref_head, |
4348 | href_node); | |
4349 | if (!mutex_trylock(&head->mutex)) { | |
4350 | atomic_inc(&head->node.refs); | |
4351 | spin_unlock(&delayed_refs->lock); | |
eb12db69 | 4352 | |
d7df2c79 | 4353 | mutex_lock(&head->mutex); |
e78417d1 | 4354 | mutex_unlock(&head->mutex); |
d7df2c79 JB |
4355 | btrfs_put_delayed_ref(&head->node); |
4356 | spin_lock(&delayed_refs->lock); | |
4357 | continue; | |
4358 | } | |
4359 | spin_lock(&head->lock); | |
c6fc2454 QW |
4360 | list_for_each_entry_safe_reverse(ref, tmp, &head->ref_list, |
4361 | list) { | |
d7df2c79 | 4362 | ref->in_tree = 0; |
c6fc2454 | 4363 | list_del(&ref->list); |
1d57ee94 WX |
4364 | if (!list_empty(&ref->add_list)) |
4365 | list_del(&ref->add_list); | |
d7df2c79 JB |
4366 | atomic_dec(&delayed_refs->num_entries); |
4367 | btrfs_put_delayed_ref(ref); | |
e78417d1 | 4368 | } |
d7df2c79 JB |
4369 | if (head->must_insert_reserved) |
4370 | pin_bytes = true; | |
4371 | btrfs_free_delayed_extent_op(head->extent_op); | |
4372 | delayed_refs->num_heads--; | |
4373 | if (head->processing == 0) | |
4374 | delayed_refs->num_heads_ready--; | |
4375 | atomic_dec(&delayed_refs->num_entries); | |
4376 | head->node.in_tree = 0; | |
4377 | rb_erase(&head->href_node, &delayed_refs->href_root); | |
4378 | spin_unlock(&head->lock); | |
4379 | spin_unlock(&delayed_refs->lock); | |
4380 | mutex_unlock(&head->mutex); | |
acce952b | 4381 | |
d7df2c79 | 4382 | if (pin_bytes) |
2ff7e61e | 4383 | btrfs_pin_extent(fs_info, head->node.bytenr, |
d7df2c79 JB |
4384 | head->node.num_bytes, 1); |
4385 | btrfs_put_delayed_ref(&head->node); | |
acce952b | 4386 | cond_resched(); |
4387 | spin_lock(&delayed_refs->lock); | |
4388 | } | |
4389 | ||
4390 | spin_unlock(&delayed_refs->lock); | |
4391 | ||
4392 | return ret; | |
4393 | } | |
4394 | ||
143bede5 | 4395 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
acce952b | 4396 | { |
4397 | struct btrfs_inode *btrfs_inode; | |
4398 | struct list_head splice; | |
4399 | ||
4400 | INIT_LIST_HEAD(&splice); | |
4401 | ||
eb73c1b7 MX |
4402 | spin_lock(&root->delalloc_lock); |
4403 | list_splice_init(&root->delalloc_inodes, &splice); | |
acce952b | 4404 | |
4405 | while (!list_empty(&splice)) { | |
eb73c1b7 MX |
4406 | btrfs_inode = list_first_entry(&splice, struct btrfs_inode, |
4407 | delalloc_inodes); | |
acce952b | 4408 | |
4409 | list_del_init(&btrfs_inode->delalloc_inodes); | |
df0af1a5 MX |
4410 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
4411 | &btrfs_inode->runtime_flags); | |
eb73c1b7 | 4412 | spin_unlock(&root->delalloc_lock); |
acce952b | 4413 | |
4414 | btrfs_invalidate_inodes(btrfs_inode->root); | |
b216cbfb | 4415 | |
eb73c1b7 | 4416 | spin_lock(&root->delalloc_lock); |
acce952b | 4417 | } |
4418 | ||
eb73c1b7 MX |
4419 | spin_unlock(&root->delalloc_lock); |
4420 | } | |
4421 | ||
4422 | static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) | |
4423 | { | |
4424 | struct btrfs_root *root; | |
4425 | struct list_head splice; | |
4426 | ||
4427 | INIT_LIST_HEAD(&splice); | |
4428 | ||
4429 | spin_lock(&fs_info->delalloc_root_lock); | |
4430 | list_splice_init(&fs_info->delalloc_roots, &splice); | |
4431 | while (!list_empty(&splice)) { | |
4432 | root = list_first_entry(&splice, struct btrfs_root, | |
4433 | delalloc_root); | |
4434 | list_del_init(&root->delalloc_root); | |
4435 | root = btrfs_grab_fs_root(root); | |
4436 | BUG_ON(!root); | |
4437 | spin_unlock(&fs_info->delalloc_root_lock); | |
4438 | ||
4439 | btrfs_destroy_delalloc_inodes(root); | |
4440 | btrfs_put_fs_root(root); | |
4441 | ||
4442 | spin_lock(&fs_info->delalloc_root_lock); | |
4443 | } | |
4444 | spin_unlock(&fs_info->delalloc_root_lock); | |
acce952b | 4445 | } |
4446 | ||
2ff7e61e | 4447 | static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info, |
acce952b | 4448 | struct extent_io_tree *dirty_pages, |
4449 | int mark) | |
4450 | { | |
4451 | int ret; | |
acce952b | 4452 | struct extent_buffer *eb; |
4453 | u64 start = 0; | |
4454 | u64 end; | |
acce952b | 4455 | |
4456 | while (1) { | |
4457 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, | |
e6138876 | 4458 | mark, NULL); |
acce952b | 4459 | if (ret) |
4460 | break; | |
4461 | ||
91166212 | 4462 | clear_extent_bits(dirty_pages, start, end, mark); |
acce952b | 4463 | while (start <= end) { |
0b246afa JM |
4464 | eb = find_extent_buffer(fs_info, start); |
4465 | start += fs_info->nodesize; | |
fd8b2b61 | 4466 | if (!eb) |
acce952b | 4467 | continue; |
fd8b2b61 | 4468 | wait_on_extent_buffer_writeback(eb); |
acce952b | 4469 | |
fd8b2b61 JB |
4470 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
4471 | &eb->bflags)) | |
4472 | clear_extent_buffer_dirty(eb); | |
4473 | free_extent_buffer_stale(eb); | |
acce952b | 4474 | } |
4475 | } | |
4476 | ||
4477 | return ret; | |
4478 | } | |
4479 | ||
2ff7e61e | 4480 | static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info, |
acce952b | 4481 | struct extent_io_tree *pinned_extents) |
4482 | { | |
4483 | struct extent_io_tree *unpin; | |
4484 | u64 start; | |
4485 | u64 end; | |
4486 | int ret; | |
ed0eaa14 | 4487 | bool loop = true; |
acce952b | 4488 | |
4489 | unpin = pinned_extents; | |
ed0eaa14 | 4490 | again: |
acce952b | 4491 | while (1) { |
4492 | ret = find_first_extent_bit(unpin, 0, &start, &end, | |
e6138876 | 4493 | EXTENT_DIRTY, NULL); |
acce952b | 4494 | if (ret) |
4495 | break; | |
4496 | ||
af6f8f60 | 4497 | clear_extent_dirty(unpin, start, end); |
2ff7e61e | 4498 | btrfs_error_unpin_extent_range(fs_info, start, end); |
acce952b | 4499 | cond_resched(); |
4500 | } | |
4501 | ||
ed0eaa14 | 4502 | if (loop) { |
0b246afa JM |
4503 | if (unpin == &fs_info->freed_extents[0]) |
4504 | unpin = &fs_info->freed_extents[1]; | |
ed0eaa14 | 4505 | else |
0b246afa | 4506 | unpin = &fs_info->freed_extents[0]; |
ed0eaa14 LB |
4507 | loop = false; |
4508 | goto again; | |
4509 | } | |
4510 | ||
acce952b | 4511 | return 0; |
4512 | } | |
4513 | ||
c79a1751 LB |
4514 | static void btrfs_cleanup_bg_io(struct btrfs_block_group_cache *cache) |
4515 | { | |
4516 | struct inode *inode; | |
4517 | ||
4518 | inode = cache->io_ctl.inode; | |
4519 | if (inode) { | |
4520 | invalidate_inode_pages2(inode->i_mapping); | |
4521 | BTRFS_I(inode)->generation = 0; | |
4522 | cache->io_ctl.inode = NULL; | |
4523 | iput(inode); | |
4524 | } | |
4525 | btrfs_put_block_group(cache); | |
4526 | } | |
4527 | ||
4528 | void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans, | |
2ff7e61e | 4529 | struct btrfs_fs_info *fs_info) |
c79a1751 LB |
4530 | { |
4531 | struct btrfs_block_group_cache *cache; | |
4532 | ||
4533 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4534 | while (!list_empty(&cur_trans->dirty_bgs)) { | |
4535 | cache = list_first_entry(&cur_trans->dirty_bgs, | |
4536 | struct btrfs_block_group_cache, | |
4537 | dirty_list); | |
4538 | if (!cache) { | |
0b246afa | 4539 | btrfs_err(fs_info, "orphan block group dirty_bgs list"); |
c79a1751 LB |
4540 | spin_unlock(&cur_trans->dirty_bgs_lock); |
4541 | return; | |
4542 | } | |
4543 | ||
4544 | if (!list_empty(&cache->io_list)) { | |
4545 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4546 | list_del_init(&cache->io_list); | |
4547 | btrfs_cleanup_bg_io(cache); | |
4548 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4549 | } | |
4550 | ||
4551 | list_del_init(&cache->dirty_list); | |
4552 | spin_lock(&cache->lock); | |
4553 | cache->disk_cache_state = BTRFS_DC_ERROR; | |
4554 | spin_unlock(&cache->lock); | |
4555 | ||
4556 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4557 | btrfs_put_block_group(cache); | |
4558 | spin_lock(&cur_trans->dirty_bgs_lock); | |
4559 | } | |
4560 | spin_unlock(&cur_trans->dirty_bgs_lock); | |
4561 | ||
4562 | while (!list_empty(&cur_trans->io_bgs)) { | |
4563 | cache = list_first_entry(&cur_trans->io_bgs, | |
4564 | struct btrfs_block_group_cache, | |
4565 | io_list); | |
4566 | if (!cache) { | |
0b246afa | 4567 | btrfs_err(fs_info, "orphan block group on io_bgs list"); |
c79a1751 LB |
4568 | return; |
4569 | } | |
4570 | ||
4571 | list_del_init(&cache->io_list); | |
4572 | spin_lock(&cache->lock); | |
4573 | cache->disk_cache_state = BTRFS_DC_ERROR; | |
4574 | spin_unlock(&cache->lock); | |
4575 | btrfs_cleanup_bg_io(cache); | |
4576 | } | |
4577 | } | |
4578 | ||
49b25e05 | 4579 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
2ff7e61e | 4580 | struct btrfs_fs_info *fs_info) |
49b25e05 | 4581 | { |
2ff7e61e | 4582 | btrfs_cleanup_dirty_bgs(cur_trans, fs_info); |
c79a1751 LB |
4583 | ASSERT(list_empty(&cur_trans->dirty_bgs)); |
4584 | ASSERT(list_empty(&cur_trans->io_bgs)); | |
4585 | ||
2ff7e61e | 4586 | btrfs_destroy_delayed_refs(cur_trans, fs_info); |
49b25e05 | 4587 | |
4a9d8bde | 4588 | cur_trans->state = TRANS_STATE_COMMIT_START; |
0b246afa | 4589 | wake_up(&fs_info->transaction_blocked_wait); |
49b25e05 | 4590 | |
4a9d8bde | 4591 | cur_trans->state = TRANS_STATE_UNBLOCKED; |
0b246afa | 4592 | wake_up(&fs_info->transaction_wait); |
49b25e05 | 4593 | |
ccdf9b30 JM |
4594 | btrfs_destroy_delayed_inodes(fs_info); |
4595 | btrfs_assert_delayed_root_empty(fs_info); | |
49b25e05 | 4596 | |
2ff7e61e | 4597 | btrfs_destroy_marked_extents(fs_info, &cur_trans->dirty_pages, |
49b25e05 | 4598 | EXTENT_DIRTY); |
2ff7e61e | 4599 | btrfs_destroy_pinned_extent(fs_info, |
0b246afa | 4600 | fs_info->pinned_extents); |
49b25e05 | 4601 | |
4a9d8bde MX |
4602 | cur_trans->state =TRANS_STATE_COMPLETED; |
4603 | wake_up(&cur_trans->commit_wait); | |
4604 | ||
49b25e05 JM |
4605 | /* |
4606 | memset(cur_trans, 0, sizeof(*cur_trans)); | |
4607 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); | |
4608 | */ | |
4609 | } | |
4610 | ||
2ff7e61e | 4611 | static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info) |
acce952b | 4612 | { |
4613 | struct btrfs_transaction *t; | |
acce952b | 4614 | |
0b246afa | 4615 | mutex_lock(&fs_info->transaction_kthread_mutex); |
acce952b | 4616 | |
0b246afa JM |
4617 | spin_lock(&fs_info->trans_lock); |
4618 | while (!list_empty(&fs_info->trans_list)) { | |
4619 | t = list_first_entry(&fs_info->trans_list, | |
724e2315 JB |
4620 | struct btrfs_transaction, list); |
4621 | if (t->state >= TRANS_STATE_COMMIT_START) { | |
4622 | atomic_inc(&t->use_count); | |
0b246afa | 4623 | spin_unlock(&fs_info->trans_lock); |
2ff7e61e | 4624 | btrfs_wait_for_commit(fs_info, t->transid); |
724e2315 | 4625 | btrfs_put_transaction(t); |
0b246afa | 4626 | spin_lock(&fs_info->trans_lock); |
724e2315 JB |
4627 | continue; |
4628 | } | |
0b246afa | 4629 | if (t == fs_info->running_transaction) { |
724e2315 | 4630 | t->state = TRANS_STATE_COMMIT_DOING; |
0b246afa | 4631 | spin_unlock(&fs_info->trans_lock); |
724e2315 JB |
4632 | /* |
4633 | * We wait for 0 num_writers since we don't hold a trans | |
4634 | * handle open currently for this transaction. | |
4635 | */ | |
4636 | wait_event(t->writer_wait, | |
4637 | atomic_read(&t->num_writers) == 0); | |
4638 | } else { | |
0b246afa | 4639 | spin_unlock(&fs_info->trans_lock); |
724e2315 | 4640 | } |
2ff7e61e | 4641 | btrfs_cleanup_one_transaction(t, fs_info); |
4a9d8bde | 4642 | |
0b246afa JM |
4643 | spin_lock(&fs_info->trans_lock); |
4644 | if (t == fs_info->running_transaction) | |
4645 | fs_info->running_transaction = NULL; | |
acce952b | 4646 | list_del_init(&t->list); |
0b246afa | 4647 | spin_unlock(&fs_info->trans_lock); |
acce952b | 4648 | |
724e2315 | 4649 | btrfs_put_transaction(t); |
2ff7e61e | 4650 | trace_btrfs_transaction_commit(fs_info->tree_root); |
0b246afa | 4651 | spin_lock(&fs_info->trans_lock); |
724e2315 | 4652 | } |
0b246afa JM |
4653 | spin_unlock(&fs_info->trans_lock); |
4654 | btrfs_destroy_all_ordered_extents(fs_info); | |
ccdf9b30 JM |
4655 | btrfs_destroy_delayed_inodes(fs_info); |
4656 | btrfs_assert_delayed_root_empty(fs_info); | |
2ff7e61e | 4657 | btrfs_destroy_pinned_extent(fs_info, fs_info->pinned_extents); |
0b246afa JM |
4658 | btrfs_destroy_all_delalloc_inodes(fs_info); |
4659 | mutex_unlock(&fs_info->transaction_kthread_mutex); | |
acce952b | 4660 | |
4661 | return 0; | |
4662 | } | |
4663 | ||
e8c9f186 | 4664 | static const struct extent_io_ops btree_extent_io_ops = { |
ce9adaa5 | 4665 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
4bb31e92 | 4666 | .readpage_io_failed_hook = btree_io_failed_hook, |
0b86a832 | 4667 | .submit_bio_hook = btree_submit_bio_hook, |
239b14b3 CM |
4668 | /* note we're sharing with inode.c for the merge bio hook */ |
4669 | .merge_bio_hook = btrfs_merge_bio_hook, | |
0da5468f | 4670 | }; |