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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> |
4b4e25f2 | 28 | #include <linux/freezer.h> |
163e783e | 29 | #include <linux/crc32c.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
784b4e29 | 31 | #include <linux/migrate.h> |
7a36ddec | 32 | #include <linux/ratelimit.h> |
6463fe58 | 33 | #include <linux/uuid.h> |
7e75bf3f | 34 | #include <asm/unaligned.h> |
4b4e25f2 | 35 | #include "compat.h" |
eb60ceac CM |
36 | #include "ctree.h" |
37 | #include "disk-io.h" | |
e089f05c | 38 | #include "transaction.h" |
0f7d52f4 | 39 | #include "btrfs_inode.h" |
0b86a832 | 40 | #include "volumes.h" |
db94535d | 41 | #include "print-tree.h" |
8b712842 | 42 | #include "async-thread.h" |
925baedd | 43 | #include "locking.h" |
e02119d5 | 44 | #include "tree-log.h" |
fa9c0d79 | 45 | #include "free-space-cache.h" |
581bb050 | 46 | #include "inode-map.h" |
21adbd5c | 47 | #include "check-integrity.h" |
606686ee | 48 | #include "rcu-string.h" |
8dabb742 | 49 | #include "dev-replace.h" |
53b381b3 | 50 | #include "raid56.h" |
eb60ceac | 51 | |
de0022b9 JB |
52 | #ifdef CONFIG_X86 |
53 | #include <asm/cpufeature.h> | |
54 | #endif | |
55 | ||
d1310b2e | 56 | static struct extent_io_ops btree_extent_io_ops; |
8b712842 | 57 | static void end_workqueue_fn(struct btrfs_work *work); |
4df27c4d | 58 | static void free_fs_root(struct btrfs_root *root); |
fcd1f065 | 59 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 60 | int read_only); |
569e0f35 JB |
61 | static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, |
62 | struct btrfs_root *root); | |
143bede5 | 63 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
acce952b | 64 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
65 | struct btrfs_root *root); | |
aec8030a | 66 | static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t); |
143bede5 | 67 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
acce952b | 68 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
69 | struct extent_io_tree *dirty_pages, | |
70 | int mark); | |
71 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, | |
72 | struct extent_io_tree *pinned_extents); | |
48a3b636 ES |
73 | static int btrfs_cleanup_transaction(struct btrfs_root *root); |
74 | static void btrfs_error_commit_super(struct btrfs_root *root); | |
ce9adaa5 | 75 | |
d352ac68 CM |
76 | /* |
77 | * end_io_wq structs are used to do processing in task context when an IO is | |
78 | * complete. This is used during reads to verify checksums, and it is used | |
79 | * by writes to insert metadata for new file extents after IO is complete. | |
80 | */ | |
ce9adaa5 CM |
81 | struct end_io_wq { |
82 | struct bio *bio; | |
83 | bio_end_io_t *end_io; | |
84 | void *private; | |
85 | struct btrfs_fs_info *info; | |
86 | int error; | |
22c59948 | 87 | int metadata; |
ce9adaa5 | 88 | struct list_head list; |
8b712842 | 89 | struct btrfs_work work; |
ce9adaa5 | 90 | }; |
0da5468f | 91 | |
d352ac68 CM |
92 | /* |
93 | * async submit bios are used to offload expensive checksumming | |
94 | * onto the worker threads. They checksum file and metadata bios | |
95 | * just before they are sent down the IO stack. | |
96 | */ | |
44b8bd7e CM |
97 | struct async_submit_bio { |
98 | struct inode *inode; | |
99 | struct bio *bio; | |
100 | struct list_head list; | |
4a69a410 CM |
101 | extent_submit_bio_hook_t *submit_bio_start; |
102 | extent_submit_bio_hook_t *submit_bio_done; | |
44b8bd7e CM |
103 | int rw; |
104 | int mirror_num; | |
c8b97818 | 105 | unsigned long bio_flags; |
eaf25d93 CM |
106 | /* |
107 | * bio_offset is optional, can be used if the pages in the bio | |
108 | * can't tell us where in the file the bio should go | |
109 | */ | |
110 | u64 bio_offset; | |
8b712842 | 111 | struct btrfs_work work; |
79787eaa | 112 | int error; |
44b8bd7e CM |
113 | }; |
114 | ||
85d4e461 CM |
115 | /* |
116 | * Lockdep class keys for extent_buffer->lock's in this root. For a given | |
117 | * eb, the lockdep key is determined by the btrfs_root it belongs to and | |
118 | * the level the eb occupies in the tree. | |
119 | * | |
120 | * Different roots are used for different purposes and may nest inside each | |
121 | * other and they require separate keysets. As lockdep keys should be | |
122 | * static, assign keysets according to the purpose of the root as indicated | |
123 | * by btrfs_root->objectid. This ensures that all special purpose roots | |
124 | * have separate keysets. | |
4008c04a | 125 | * |
85d4e461 CM |
126 | * Lock-nesting across peer nodes is always done with the immediate parent |
127 | * node locked thus preventing deadlock. As lockdep doesn't know this, use | |
128 | * subclass to avoid triggering lockdep warning in such cases. | |
4008c04a | 129 | * |
85d4e461 CM |
130 | * The key is set by the readpage_end_io_hook after the buffer has passed |
131 | * csum validation but before the pages are unlocked. It is also set by | |
132 | * btrfs_init_new_buffer on freshly allocated blocks. | |
4008c04a | 133 | * |
85d4e461 CM |
134 | * We also add a check to make sure the highest level of the tree is the |
135 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code | |
136 | * needs update as well. | |
4008c04a CM |
137 | */ |
138 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
139 | # if BTRFS_MAX_LEVEL != 8 | |
140 | # error | |
141 | # endif | |
85d4e461 CM |
142 | |
143 | static struct btrfs_lockdep_keyset { | |
144 | u64 id; /* root objectid */ | |
145 | const char *name_stem; /* lock name stem */ | |
146 | char names[BTRFS_MAX_LEVEL + 1][20]; | |
147 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; | |
148 | } btrfs_lockdep_keysets[] = { | |
149 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, | |
150 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, | |
151 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, | |
152 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, | |
153 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, | |
154 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, | |
60b62978 | 155 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
85d4e461 CM |
156 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
157 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, | |
158 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, | |
159 | { .id = 0, .name_stem = "tree" }, | |
4008c04a | 160 | }; |
85d4e461 CM |
161 | |
162 | void __init btrfs_init_lockdep(void) | |
163 | { | |
164 | int i, j; | |
165 | ||
166 | /* initialize lockdep class names */ | |
167 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { | |
168 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; | |
169 | ||
170 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) | |
171 | snprintf(ks->names[j], sizeof(ks->names[j]), | |
172 | "btrfs-%s-%02d", ks->name_stem, j); | |
173 | } | |
174 | } | |
175 | ||
176 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, | |
177 | int level) | |
178 | { | |
179 | struct btrfs_lockdep_keyset *ks; | |
180 | ||
181 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); | |
182 | ||
183 | /* find the matching keyset, id 0 is the default entry */ | |
184 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) | |
185 | if (ks->id == objectid) | |
186 | break; | |
187 | ||
188 | lockdep_set_class_and_name(&eb->lock, | |
189 | &ks->keys[level], ks->names[level]); | |
190 | } | |
191 | ||
4008c04a CM |
192 | #endif |
193 | ||
d352ac68 CM |
194 | /* |
195 | * extents on the btree inode are pretty simple, there's one extent | |
196 | * that covers the entire device | |
197 | */ | |
b2950863 | 198 | static struct extent_map *btree_get_extent(struct inode *inode, |
306e16ce | 199 | struct page *page, size_t pg_offset, u64 start, u64 len, |
b2950863 | 200 | int create) |
7eccb903 | 201 | { |
5f39d397 CM |
202 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
203 | struct extent_map *em; | |
204 | int ret; | |
205 | ||
890871be | 206 | read_lock(&em_tree->lock); |
d1310b2e | 207 | em = lookup_extent_mapping(em_tree, start, len); |
a061fc8d CM |
208 | if (em) { |
209 | em->bdev = | |
210 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; | |
890871be | 211 | read_unlock(&em_tree->lock); |
5f39d397 | 212 | goto out; |
a061fc8d | 213 | } |
890871be | 214 | read_unlock(&em_tree->lock); |
7b13b7b1 | 215 | |
172ddd60 | 216 | em = alloc_extent_map(); |
5f39d397 CM |
217 | if (!em) { |
218 | em = ERR_PTR(-ENOMEM); | |
219 | goto out; | |
220 | } | |
221 | em->start = 0; | |
0afbaf8c | 222 | em->len = (u64)-1; |
c8b97818 | 223 | em->block_len = (u64)-1; |
5f39d397 | 224 | em->block_start = 0; |
a061fc8d | 225 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
d1310b2e | 226 | |
890871be | 227 | write_lock(&em_tree->lock); |
09a2a8f9 | 228 | ret = add_extent_mapping(em_tree, em, 0); |
5f39d397 CM |
229 | if (ret == -EEXIST) { |
230 | free_extent_map(em); | |
7b13b7b1 | 231 | em = lookup_extent_mapping(em_tree, start, len); |
b4f359ab | 232 | if (!em) |
0433f20d | 233 | em = ERR_PTR(-EIO); |
5f39d397 | 234 | } else if (ret) { |
7b13b7b1 | 235 | free_extent_map(em); |
0433f20d | 236 | em = ERR_PTR(ret); |
5f39d397 | 237 | } |
890871be | 238 | write_unlock(&em_tree->lock); |
7b13b7b1 | 239 | |
5f39d397 CM |
240 | out: |
241 | return em; | |
7eccb903 CM |
242 | } |
243 | ||
b0496686 | 244 | u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
19c00ddc | 245 | { |
163e783e | 246 | return crc32c(seed, data, len); |
19c00ddc CM |
247 | } |
248 | ||
249 | void btrfs_csum_final(u32 crc, char *result) | |
250 | { | |
7e75bf3f | 251 | put_unaligned_le32(~crc, result); |
19c00ddc CM |
252 | } |
253 | ||
d352ac68 CM |
254 | /* |
255 | * compute the csum for a btree block, and either verify it or write it | |
256 | * into the csum field of the block. | |
257 | */ | |
19c00ddc CM |
258 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
259 | int verify) | |
260 | { | |
6c41761f | 261 | u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); |
607d432d | 262 | char *result = NULL; |
19c00ddc CM |
263 | unsigned long len; |
264 | unsigned long cur_len; | |
265 | unsigned long offset = BTRFS_CSUM_SIZE; | |
19c00ddc CM |
266 | char *kaddr; |
267 | unsigned long map_start; | |
268 | unsigned long map_len; | |
269 | int err; | |
270 | u32 crc = ~(u32)0; | |
607d432d | 271 | unsigned long inline_result; |
19c00ddc CM |
272 | |
273 | len = buf->len - offset; | |
d397712b | 274 | while (len > 0) { |
19c00ddc | 275 | err = map_private_extent_buffer(buf, offset, 32, |
a6591715 | 276 | &kaddr, &map_start, &map_len); |
d397712b | 277 | if (err) |
19c00ddc | 278 | return 1; |
19c00ddc | 279 | cur_len = min(len, map_len - (offset - map_start)); |
b0496686 | 280 | crc = btrfs_csum_data(kaddr + offset - map_start, |
19c00ddc CM |
281 | crc, cur_len); |
282 | len -= cur_len; | |
283 | offset += cur_len; | |
19c00ddc | 284 | } |
607d432d JB |
285 | if (csum_size > sizeof(inline_result)) { |
286 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); | |
287 | if (!result) | |
288 | return 1; | |
289 | } else { | |
290 | result = (char *)&inline_result; | |
291 | } | |
292 | ||
19c00ddc CM |
293 | btrfs_csum_final(crc, result); |
294 | ||
295 | if (verify) { | |
607d432d | 296 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
e4204ded CM |
297 | u32 val; |
298 | u32 found = 0; | |
607d432d | 299 | memcpy(&found, result, csum_size); |
e4204ded | 300 | |
607d432d | 301 | read_extent_buffer(buf, &val, 0, csum_size); |
7a36ddec | 302 | printk_ratelimited(KERN_INFO "btrfs: %s checksum verify " |
193f284d CM |
303 | "failed on %llu wanted %X found %X " |
304 | "level %d\n", | |
305 | root->fs_info->sb->s_id, | |
306 | (unsigned long long)buf->start, val, found, | |
307 | btrfs_header_level(buf)); | |
607d432d JB |
308 | if (result != (char *)&inline_result) |
309 | kfree(result); | |
19c00ddc CM |
310 | return 1; |
311 | } | |
312 | } else { | |
607d432d | 313 | write_extent_buffer(buf, result, 0, csum_size); |
19c00ddc | 314 | } |
607d432d JB |
315 | if (result != (char *)&inline_result) |
316 | kfree(result); | |
19c00ddc CM |
317 | return 0; |
318 | } | |
319 | ||
d352ac68 CM |
320 | /* |
321 | * we can't consider a given block up to date unless the transid of the | |
322 | * block matches the transid in the parent node's pointer. This is how we | |
323 | * detect blocks that either didn't get written at all or got written | |
324 | * in the wrong place. | |
325 | */ | |
1259ab75 | 326 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
b9fab919 CM |
327 | struct extent_buffer *eb, u64 parent_transid, |
328 | int atomic) | |
1259ab75 | 329 | { |
2ac55d41 | 330 | struct extent_state *cached_state = NULL; |
1259ab75 CM |
331 | int ret; |
332 | ||
333 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) | |
334 | return 0; | |
335 | ||
b9fab919 CM |
336 | if (atomic) |
337 | return -EAGAIN; | |
338 | ||
2ac55d41 | 339 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
d0082371 | 340 | 0, &cached_state); |
0b32f4bb | 341 | if (extent_buffer_uptodate(eb) && |
1259ab75 CM |
342 | btrfs_header_generation(eb) == parent_transid) { |
343 | ret = 0; | |
344 | goto out; | |
345 | } | |
7a36ddec | 346 | printk_ratelimited("parent transid verify failed on %llu wanted %llu " |
193f284d CM |
347 | "found %llu\n", |
348 | (unsigned long long)eb->start, | |
349 | (unsigned long long)parent_transid, | |
350 | (unsigned long long)btrfs_header_generation(eb)); | |
1259ab75 | 351 | ret = 1; |
0b32f4bb | 352 | clear_extent_buffer_uptodate(eb); |
33958dc6 | 353 | out: |
2ac55d41 JB |
354 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
355 | &cached_state, GFP_NOFS); | |
1259ab75 | 356 | return ret; |
1259ab75 CM |
357 | } |
358 | ||
1104a885 DS |
359 | /* |
360 | * Return 0 if the superblock checksum type matches the checksum value of that | |
361 | * algorithm. Pass the raw disk superblock data. | |
362 | */ | |
363 | static int btrfs_check_super_csum(char *raw_disk_sb) | |
364 | { | |
365 | struct btrfs_super_block *disk_sb = | |
366 | (struct btrfs_super_block *)raw_disk_sb; | |
367 | u16 csum_type = btrfs_super_csum_type(disk_sb); | |
368 | int ret = 0; | |
369 | ||
370 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { | |
371 | u32 crc = ~(u32)0; | |
372 | const int csum_size = sizeof(crc); | |
373 | char result[csum_size]; | |
374 | ||
375 | /* | |
376 | * The super_block structure does not span the whole | |
377 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space | |
378 | * is filled with zeros and is included in the checkum. | |
379 | */ | |
380 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, | |
381 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); | |
382 | btrfs_csum_final(crc, result); | |
383 | ||
384 | if (memcmp(raw_disk_sb, result, csum_size)) | |
385 | ret = 1; | |
667e7d94 CM |
386 | |
387 | if (ret && btrfs_super_generation(disk_sb) < 10) { | |
388 | printk(KERN_WARNING "btrfs: super block crcs don't match, older mkfs detected\n"); | |
389 | ret = 0; | |
390 | } | |
1104a885 DS |
391 | } |
392 | ||
393 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { | |
394 | printk(KERN_ERR "btrfs: unsupported checksum algorithm %u\n", | |
395 | csum_type); | |
396 | ret = 1; | |
397 | } | |
398 | ||
399 | return ret; | |
400 | } | |
401 | ||
d352ac68 CM |
402 | /* |
403 | * helper to read a given tree block, doing retries as required when | |
404 | * the checksums don't match and we have alternate mirrors to try. | |
405 | */ | |
f188591e CM |
406 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
407 | struct extent_buffer *eb, | |
ca7a79ad | 408 | u64 start, u64 parent_transid) |
f188591e CM |
409 | { |
410 | struct extent_io_tree *io_tree; | |
ea466794 | 411 | int failed = 0; |
f188591e CM |
412 | int ret; |
413 | int num_copies = 0; | |
414 | int mirror_num = 0; | |
ea466794 | 415 | int failed_mirror = 0; |
f188591e | 416 | |
a826d6dc | 417 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
f188591e CM |
418 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
419 | while (1) { | |
bb82ab88 AJ |
420 | ret = read_extent_buffer_pages(io_tree, eb, start, |
421 | WAIT_COMPLETE, | |
f188591e | 422 | btree_get_extent, mirror_num); |
256dd1bb SB |
423 | if (!ret) { |
424 | if (!verify_parent_transid(io_tree, eb, | |
b9fab919 | 425 | parent_transid, 0)) |
256dd1bb SB |
426 | break; |
427 | else | |
428 | ret = -EIO; | |
429 | } | |
d397712b | 430 | |
a826d6dc JB |
431 | /* |
432 | * This buffer's crc is fine, but its contents are corrupted, so | |
433 | * there is no reason to read the other copies, they won't be | |
434 | * any less wrong. | |
435 | */ | |
436 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) | |
ea466794 JB |
437 | break; |
438 | ||
5d964051 | 439 | num_copies = btrfs_num_copies(root->fs_info, |
f188591e | 440 | eb->start, eb->len); |
4235298e | 441 | if (num_copies == 1) |
ea466794 | 442 | break; |
4235298e | 443 | |
5cf1ab56 JB |
444 | if (!failed_mirror) { |
445 | failed = 1; | |
446 | failed_mirror = eb->read_mirror; | |
447 | } | |
448 | ||
f188591e | 449 | mirror_num++; |
ea466794 JB |
450 | if (mirror_num == failed_mirror) |
451 | mirror_num++; | |
452 | ||
4235298e | 453 | if (mirror_num > num_copies) |
ea466794 | 454 | break; |
f188591e | 455 | } |
ea466794 | 456 | |
c0901581 | 457 | if (failed && !ret && failed_mirror) |
ea466794 JB |
458 | repair_eb_io_failure(root, eb, failed_mirror); |
459 | ||
460 | return ret; | |
f188591e | 461 | } |
19c00ddc | 462 | |
d352ac68 | 463 | /* |
d397712b CM |
464 | * checksum a dirty tree block before IO. This has extra checks to make sure |
465 | * we only fill in the checksum field in the first page of a multi-page block | |
d352ac68 | 466 | */ |
d397712b | 467 | |
b2950863 | 468 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
19c00ddc | 469 | { |
d1310b2e | 470 | struct extent_io_tree *tree; |
4eee4fa4 | 471 | u64 start = page_offset(page); |
19c00ddc | 472 | u64 found_start; |
19c00ddc | 473 | struct extent_buffer *eb; |
f188591e | 474 | |
d1310b2e | 475 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
19c00ddc | 476 | |
4f2de97a JB |
477 | eb = (struct extent_buffer *)page->private; |
478 | if (page != eb->pages[0]) | |
479 | return 0; | |
19c00ddc CM |
480 | found_start = btrfs_header_bytenr(eb); |
481 | if (found_start != start) { | |
55c69072 | 482 | WARN_ON(1); |
4f2de97a | 483 | return 0; |
55c69072 | 484 | } |
55c69072 | 485 | if (!PageUptodate(page)) { |
55c69072 | 486 | WARN_ON(1); |
4f2de97a | 487 | return 0; |
19c00ddc | 488 | } |
19c00ddc | 489 | csum_tree_block(root, eb, 0); |
19c00ddc CM |
490 | return 0; |
491 | } | |
492 | ||
2b82032c YZ |
493 | static int check_tree_block_fsid(struct btrfs_root *root, |
494 | struct extent_buffer *eb) | |
495 | { | |
496 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; | |
497 | u8 fsid[BTRFS_UUID_SIZE]; | |
498 | int ret = 1; | |
499 | ||
500 | read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), | |
501 | BTRFS_FSID_SIZE); | |
502 | while (fs_devices) { | |
503 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { | |
504 | ret = 0; | |
505 | break; | |
506 | } | |
507 | fs_devices = fs_devices->seed; | |
508 | } | |
509 | return ret; | |
510 | } | |
511 | ||
a826d6dc JB |
512 | #define CORRUPT(reason, eb, root, slot) \ |
513 | printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ | |
514 | "root=%llu, slot=%d\n", reason, \ | |
515 | (unsigned long long)btrfs_header_bytenr(eb), \ | |
516 | (unsigned long long)root->objectid, slot) | |
517 | ||
518 | static noinline int check_leaf(struct btrfs_root *root, | |
519 | struct extent_buffer *leaf) | |
520 | { | |
521 | struct btrfs_key key; | |
522 | struct btrfs_key leaf_key; | |
523 | u32 nritems = btrfs_header_nritems(leaf); | |
524 | int slot; | |
525 | ||
526 | if (nritems == 0) | |
527 | return 0; | |
528 | ||
529 | /* Check the 0 item */ | |
530 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != | |
531 | BTRFS_LEAF_DATA_SIZE(root)) { | |
532 | CORRUPT("invalid item offset size pair", leaf, root, 0); | |
533 | return -EIO; | |
534 | } | |
535 | ||
536 | /* | |
537 | * Check to make sure each items keys are in the correct order and their | |
538 | * offsets make sense. We only have to loop through nritems-1 because | |
539 | * we check the current slot against the next slot, which verifies the | |
540 | * next slot's offset+size makes sense and that the current's slot | |
541 | * offset is correct. | |
542 | */ | |
543 | for (slot = 0; slot < nritems - 1; slot++) { | |
544 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); | |
545 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); | |
546 | ||
547 | /* Make sure the keys are in the right order */ | |
548 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { | |
549 | CORRUPT("bad key order", leaf, root, slot); | |
550 | return -EIO; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Make sure the offset and ends are right, remember that the | |
555 | * item data starts at the end of the leaf and grows towards the | |
556 | * front. | |
557 | */ | |
558 | if (btrfs_item_offset_nr(leaf, slot) != | |
559 | btrfs_item_end_nr(leaf, slot + 1)) { | |
560 | CORRUPT("slot offset bad", leaf, root, slot); | |
561 | return -EIO; | |
562 | } | |
563 | ||
564 | /* | |
565 | * Check to make sure that we don't point outside of the leaf, | |
566 | * just incase all the items are consistent to eachother, but | |
567 | * all point outside of the leaf. | |
568 | */ | |
569 | if (btrfs_item_end_nr(leaf, slot) > | |
570 | BTRFS_LEAF_DATA_SIZE(root)) { | |
571 | CORRUPT("slot end outside of leaf", leaf, root, slot); | |
572 | return -EIO; | |
573 | } | |
574 | } | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
b2950863 | 579 | static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
5cf1ab56 | 580 | struct extent_state *state, int mirror) |
ce9adaa5 CM |
581 | { |
582 | struct extent_io_tree *tree; | |
583 | u64 found_start; | |
584 | int found_level; | |
ce9adaa5 CM |
585 | struct extent_buffer *eb; |
586 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
f188591e | 587 | int ret = 0; |
727011e0 | 588 | int reads_done; |
ce9adaa5 | 589 | |
ce9adaa5 CM |
590 | if (!page->private) |
591 | goto out; | |
d397712b | 592 | |
727011e0 | 593 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
4f2de97a | 594 | eb = (struct extent_buffer *)page->private; |
d397712b | 595 | |
0b32f4bb JB |
596 | /* the pending IO might have been the only thing that kept this buffer |
597 | * in memory. Make sure we have a ref for all this other checks | |
598 | */ | |
599 | extent_buffer_get(eb); | |
600 | ||
601 | reads_done = atomic_dec_and_test(&eb->io_pages); | |
727011e0 CM |
602 | if (!reads_done) |
603 | goto err; | |
f188591e | 604 | |
5cf1ab56 | 605 | eb->read_mirror = mirror; |
ea466794 JB |
606 | if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { |
607 | ret = -EIO; | |
608 | goto err; | |
609 | } | |
610 | ||
ce9adaa5 | 611 | found_start = btrfs_header_bytenr(eb); |
727011e0 | 612 | if (found_start != eb->start) { |
7a36ddec | 613 | printk_ratelimited(KERN_INFO "btrfs bad tree block start " |
193f284d CM |
614 | "%llu %llu\n", |
615 | (unsigned long long)found_start, | |
616 | (unsigned long long)eb->start); | |
f188591e | 617 | ret = -EIO; |
ce9adaa5 CM |
618 | goto err; |
619 | } | |
2b82032c | 620 | if (check_tree_block_fsid(root, eb)) { |
7a36ddec | 621 | printk_ratelimited(KERN_INFO "btrfs bad fsid on block %llu\n", |
193f284d | 622 | (unsigned long long)eb->start); |
1259ab75 CM |
623 | ret = -EIO; |
624 | goto err; | |
625 | } | |
ce9adaa5 | 626 | found_level = btrfs_header_level(eb); |
1c24c3ce JB |
627 | if (found_level >= BTRFS_MAX_LEVEL) { |
628 | btrfs_info(root->fs_info, "bad tree block level %d\n", | |
629 | (int)btrfs_header_level(eb)); | |
630 | ret = -EIO; | |
631 | goto err; | |
632 | } | |
ce9adaa5 | 633 | |
85d4e461 CM |
634 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
635 | eb, found_level); | |
4008c04a | 636 | |
ce9adaa5 | 637 | ret = csum_tree_block(root, eb, 1); |
a826d6dc | 638 | if (ret) { |
f188591e | 639 | ret = -EIO; |
a826d6dc JB |
640 | goto err; |
641 | } | |
642 | ||
643 | /* | |
644 | * If this is a leaf block and it is corrupt, set the corrupt bit so | |
645 | * that we don't try and read the other copies of this block, just | |
646 | * return -EIO. | |
647 | */ | |
648 | if (found_level == 0 && check_leaf(root, eb)) { | |
649 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); | |
650 | ret = -EIO; | |
651 | } | |
ce9adaa5 | 652 | |
0b32f4bb JB |
653 | if (!ret) |
654 | set_extent_buffer_uptodate(eb); | |
ce9adaa5 | 655 | err: |
79fb65a1 JB |
656 | if (reads_done && |
657 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) | |
4bb31e92 | 658 | btree_readahead_hook(root, eb, eb->start, ret); |
4bb31e92 | 659 | |
53b381b3 DW |
660 | if (ret) { |
661 | /* | |
662 | * our io error hook is going to dec the io pages | |
663 | * again, we have to make sure it has something | |
664 | * to decrement | |
665 | */ | |
666 | atomic_inc(&eb->io_pages); | |
0b32f4bb | 667 | clear_extent_buffer_uptodate(eb); |
53b381b3 | 668 | } |
0b32f4bb | 669 | free_extent_buffer(eb); |
ce9adaa5 | 670 | out: |
f188591e | 671 | return ret; |
ce9adaa5 CM |
672 | } |
673 | ||
ea466794 | 674 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
4bb31e92 | 675 | { |
4bb31e92 AJ |
676 | struct extent_buffer *eb; |
677 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
678 | ||
4f2de97a | 679 | eb = (struct extent_buffer *)page->private; |
ea466794 | 680 | set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); |
5cf1ab56 | 681 | eb->read_mirror = failed_mirror; |
53b381b3 | 682 | atomic_dec(&eb->io_pages); |
ea466794 | 683 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
4bb31e92 | 684 | btree_readahead_hook(root, eb, eb->start, -EIO); |
4bb31e92 AJ |
685 | return -EIO; /* we fixed nothing */ |
686 | } | |
687 | ||
ce9adaa5 | 688 | static void end_workqueue_bio(struct bio *bio, int err) |
ce9adaa5 CM |
689 | { |
690 | struct end_io_wq *end_io_wq = bio->bi_private; | |
691 | struct btrfs_fs_info *fs_info; | |
ce9adaa5 | 692 | |
ce9adaa5 | 693 | fs_info = end_io_wq->info; |
ce9adaa5 | 694 | end_io_wq->error = err; |
8b712842 CM |
695 | end_io_wq->work.func = end_workqueue_fn; |
696 | end_io_wq->work.flags = 0; | |
d20f7043 | 697 | |
7b6d91da | 698 | if (bio->bi_rw & REQ_WRITE) { |
53b381b3 | 699 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) |
cad321ad CM |
700 | btrfs_queue_worker(&fs_info->endio_meta_write_workers, |
701 | &end_io_wq->work); | |
53b381b3 | 702 | else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) |
0cb59c99 JB |
703 | btrfs_queue_worker(&fs_info->endio_freespace_worker, |
704 | &end_io_wq->work); | |
53b381b3 DW |
705 | else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) |
706 | btrfs_queue_worker(&fs_info->endio_raid56_workers, | |
707 | &end_io_wq->work); | |
cad321ad CM |
708 | else |
709 | btrfs_queue_worker(&fs_info->endio_write_workers, | |
710 | &end_io_wq->work); | |
d20f7043 | 711 | } else { |
53b381b3 DW |
712 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) |
713 | btrfs_queue_worker(&fs_info->endio_raid56_workers, | |
714 | &end_io_wq->work); | |
715 | else if (end_io_wq->metadata) | |
d20f7043 CM |
716 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
717 | &end_io_wq->work); | |
718 | else | |
719 | btrfs_queue_worker(&fs_info->endio_workers, | |
720 | &end_io_wq->work); | |
721 | } | |
ce9adaa5 CM |
722 | } |
723 | ||
0cb59c99 JB |
724 | /* |
725 | * For the metadata arg you want | |
726 | * | |
727 | * 0 - if data | |
728 | * 1 - if normal metadta | |
729 | * 2 - if writing to the free space cache area | |
53b381b3 | 730 | * 3 - raid parity work |
0cb59c99 | 731 | */ |
22c59948 CM |
732 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
733 | int metadata) | |
0b86a832 | 734 | { |
ce9adaa5 | 735 | struct end_io_wq *end_io_wq; |
ce9adaa5 CM |
736 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
737 | if (!end_io_wq) | |
738 | return -ENOMEM; | |
739 | ||
740 | end_io_wq->private = bio->bi_private; | |
741 | end_io_wq->end_io = bio->bi_end_io; | |
22c59948 | 742 | end_io_wq->info = info; |
ce9adaa5 CM |
743 | end_io_wq->error = 0; |
744 | end_io_wq->bio = bio; | |
22c59948 | 745 | end_io_wq->metadata = metadata; |
ce9adaa5 CM |
746 | |
747 | bio->bi_private = end_io_wq; | |
748 | bio->bi_end_io = end_workqueue_bio; | |
22c59948 CM |
749 | return 0; |
750 | } | |
751 | ||
b64a2851 | 752 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
0986fe9e | 753 | { |
4854ddd0 CM |
754 | unsigned long limit = min_t(unsigned long, |
755 | info->workers.max_workers, | |
756 | info->fs_devices->open_devices); | |
757 | return 256 * limit; | |
758 | } | |
0986fe9e | 759 | |
4a69a410 CM |
760 | static void run_one_async_start(struct btrfs_work *work) |
761 | { | |
4a69a410 | 762 | struct async_submit_bio *async; |
79787eaa | 763 | int ret; |
4a69a410 CM |
764 | |
765 | async = container_of(work, struct async_submit_bio, work); | |
79787eaa JM |
766 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
767 | async->mirror_num, async->bio_flags, | |
768 | async->bio_offset); | |
769 | if (ret) | |
770 | async->error = ret; | |
4a69a410 CM |
771 | } |
772 | ||
773 | static void run_one_async_done(struct btrfs_work *work) | |
8b712842 CM |
774 | { |
775 | struct btrfs_fs_info *fs_info; | |
776 | struct async_submit_bio *async; | |
4854ddd0 | 777 | int limit; |
8b712842 CM |
778 | |
779 | async = container_of(work, struct async_submit_bio, work); | |
780 | fs_info = BTRFS_I(async->inode)->root->fs_info; | |
4854ddd0 | 781 | |
b64a2851 | 782 | limit = btrfs_async_submit_limit(fs_info); |
4854ddd0 CM |
783 | limit = limit * 2 / 3; |
784 | ||
66657b31 | 785 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
b64a2851 | 786 | waitqueue_active(&fs_info->async_submit_wait)) |
4854ddd0 CM |
787 | wake_up(&fs_info->async_submit_wait); |
788 | ||
79787eaa JM |
789 | /* If an error occured we just want to clean up the bio and move on */ |
790 | if (async->error) { | |
791 | bio_endio(async->bio, async->error); | |
792 | return; | |
793 | } | |
794 | ||
4a69a410 | 795 | async->submit_bio_done(async->inode, async->rw, async->bio, |
eaf25d93 CM |
796 | async->mirror_num, async->bio_flags, |
797 | async->bio_offset); | |
4a69a410 CM |
798 | } |
799 | ||
800 | static void run_one_async_free(struct btrfs_work *work) | |
801 | { | |
802 | struct async_submit_bio *async; | |
803 | ||
804 | async = container_of(work, struct async_submit_bio, work); | |
8b712842 CM |
805 | kfree(async); |
806 | } | |
807 | ||
44b8bd7e CM |
808 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
809 | int rw, struct bio *bio, int mirror_num, | |
c8b97818 | 810 | unsigned long bio_flags, |
eaf25d93 | 811 | u64 bio_offset, |
4a69a410 CM |
812 | extent_submit_bio_hook_t *submit_bio_start, |
813 | extent_submit_bio_hook_t *submit_bio_done) | |
44b8bd7e CM |
814 | { |
815 | struct async_submit_bio *async; | |
816 | ||
817 | async = kmalloc(sizeof(*async), GFP_NOFS); | |
818 | if (!async) | |
819 | return -ENOMEM; | |
820 | ||
821 | async->inode = inode; | |
822 | async->rw = rw; | |
823 | async->bio = bio; | |
824 | async->mirror_num = mirror_num; | |
4a69a410 CM |
825 | async->submit_bio_start = submit_bio_start; |
826 | async->submit_bio_done = submit_bio_done; | |
827 | ||
828 | async->work.func = run_one_async_start; | |
829 | async->work.ordered_func = run_one_async_done; | |
830 | async->work.ordered_free = run_one_async_free; | |
831 | ||
8b712842 | 832 | async->work.flags = 0; |
c8b97818 | 833 | async->bio_flags = bio_flags; |
eaf25d93 | 834 | async->bio_offset = bio_offset; |
8c8bee1d | 835 | |
79787eaa JM |
836 | async->error = 0; |
837 | ||
cb03c743 | 838 | atomic_inc(&fs_info->nr_async_submits); |
d313d7a3 | 839 | |
7b6d91da | 840 | if (rw & REQ_SYNC) |
d313d7a3 CM |
841 | btrfs_set_work_high_prio(&async->work); |
842 | ||
8b712842 | 843 | btrfs_queue_worker(&fs_info->workers, &async->work); |
9473f16c | 844 | |
d397712b | 845 | while (atomic_read(&fs_info->async_submit_draining) && |
771ed689 CM |
846 | atomic_read(&fs_info->nr_async_submits)) { |
847 | wait_event(fs_info->async_submit_wait, | |
848 | (atomic_read(&fs_info->nr_async_submits) == 0)); | |
849 | } | |
850 | ||
44b8bd7e CM |
851 | return 0; |
852 | } | |
853 | ||
ce3ed71a CM |
854 | static int btree_csum_one_bio(struct bio *bio) |
855 | { | |
856 | struct bio_vec *bvec = bio->bi_io_vec; | |
857 | int bio_index = 0; | |
858 | struct btrfs_root *root; | |
79787eaa | 859 | int ret = 0; |
ce3ed71a CM |
860 | |
861 | WARN_ON(bio->bi_vcnt <= 0); | |
d397712b | 862 | while (bio_index < bio->bi_vcnt) { |
ce3ed71a | 863 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
79787eaa JM |
864 | ret = csum_dirty_buffer(root, bvec->bv_page); |
865 | if (ret) | |
866 | break; | |
ce3ed71a CM |
867 | bio_index++; |
868 | bvec++; | |
869 | } | |
79787eaa | 870 | return ret; |
ce3ed71a CM |
871 | } |
872 | ||
4a69a410 CM |
873 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
874 | struct bio *bio, int mirror_num, | |
eaf25d93 CM |
875 | unsigned long bio_flags, |
876 | u64 bio_offset) | |
22c59948 | 877 | { |
8b712842 CM |
878 | /* |
879 | * when we're called for a write, we're already in the async | |
5443be45 | 880 | * submission context. Just jump into btrfs_map_bio |
8b712842 | 881 | */ |
79787eaa | 882 | return btree_csum_one_bio(bio); |
4a69a410 | 883 | } |
22c59948 | 884 | |
4a69a410 | 885 | static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, |
eaf25d93 CM |
886 | int mirror_num, unsigned long bio_flags, |
887 | u64 bio_offset) | |
4a69a410 | 888 | { |
61891923 SB |
889 | int ret; |
890 | ||
8b712842 | 891 | /* |
4a69a410 CM |
892 | * when we're called for a write, we're already in the async |
893 | * submission context. Just jump into btrfs_map_bio | |
8b712842 | 894 | */ |
61891923 SB |
895 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
896 | if (ret) | |
897 | bio_endio(bio, ret); | |
898 | return ret; | |
0b86a832 CM |
899 | } |
900 | ||
de0022b9 JB |
901 | static int check_async_write(struct inode *inode, unsigned long bio_flags) |
902 | { | |
903 | if (bio_flags & EXTENT_BIO_TREE_LOG) | |
904 | return 0; | |
905 | #ifdef CONFIG_X86 | |
906 | if (cpu_has_xmm4_2) | |
907 | return 0; | |
908 | #endif | |
909 | return 1; | |
910 | } | |
911 | ||
44b8bd7e | 912 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
eaf25d93 CM |
913 | int mirror_num, unsigned long bio_flags, |
914 | u64 bio_offset) | |
44b8bd7e | 915 | { |
de0022b9 | 916 | int async = check_async_write(inode, bio_flags); |
cad321ad CM |
917 | int ret; |
918 | ||
7b6d91da | 919 | if (!(rw & REQ_WRITE)) { |
4a69a410 CM |
920 | /* |
921 | * called for a read, do the setup so that checksum validation | |
922 | * can happen in the async kernel threads | |
923 | */ | |
f3f266ab CM |
924 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
925 | bio, 1); | |
1d4284bd | 926 | if (ret) |
61891923 SB |
927 | goto out_w_error; |
928 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, | |
929 | mirror_num, 0); | |
de0022b9 JB |
930 | } else if (!async) { |
931 | ret = btree_csum_one_bio(bio); | |
932 | if (ret) | |
61891923 SB |
933 | goto out_w_error; |
934 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, | |
935 | mirror_num, 0); | |
936 | } else { | |
937 | /* | |
938 | * kthread helpers are used to submit writes so that | |
939 | * checksumming can happen in parallel across all CPUs | |
940 | */ | |
941 | ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, | |
942 | inode, rw, bio, mirror_num, 0, | |
943 | bio_offset, | |
944 | __btree_submit_bio_start, | |
945 | __btree_submit_bio_done); | |
44b8bd7e | 946 | } |
d313d7a3 | 947 | |
61891923 SB |
948 | if (ret) { |
949 | out_w_error: | |
950 | bio_endio(bio, ret); | |
951 | } | |
952 | return ret; | |
44b8bd7e CM |
953 | } |
954 | ||
3dd1462e | 955 | #ifdef CONFIG_MIGRATION |
784b4e29 | 956 | static int btree_migratepage(struct address_space *mapping, |
a6bc32b8 MG |
957 | struct page *newpage, struct page *page, |
958 | enum migrate_mode mode) | |
784b4e29 CM |
959 | { |
960 | /* | |
961 | * we can't safely write a btree page from here, | |
962 | * we haven't done the locking hook | |
963 | */ | |
964 | if (PageDirty(page)) | |
965 | return -EAGAIN; | |
966 | /* | |
967 | * Buffers may be managed in a filesystem specific way. | |
968 | * We must have no buffers or drop them. | |
969 | */ | |
970 | if (page_has_private(page) && | |
971 | !try_to_release_page(page, GFP_KERNEL)) | |
972 | return -EAGAIN; | |
a6bc32b8 | 973 | return migrate_page(mapping, newpage, page, mode); |
784b4e29 | 974 | } |
3dd1462e | 975 | #endif |
784b4e29 | 976 | |
0da5468f CM |
977 | |
978 | static int btree_writepages(struct address_space *mapping, | |
979 | struct writeback_control *wbc) | |
980 | { | |
d1310b2e | 981 | struct extent_io_tree *tree; |
e2d84521 MX |
982 | struct btrfs_fs_info *fs_info; |
983 | int ret; | |
984 | ||
d1310b2e | 985 | tree = &BTRFS_I(mapping->host)->io_tree; |
d8d5f3e1 | 986 | if (wbc->sync_mode == WB_SYNC_NONE) { |
448d640b CM |
987 | |
988 | if (wbc->for_kupdate) | |
989 | return 0; | |
990 | ||
e2d84521 | 991 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
b9473439 | 992 | /* this is a bit racy, but that's ok */ |
e2d84521 MX |
993 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
994 | BTRFS_DIRTY_METADATA_THRESH); | |
995 | if (ret < 0) | |
793955bc | 996 | return 0; |
793955bc | 997 | } |
0b32f4bb | 998 | return btree_write_cache_pages(mapping, wbc); |
0da5468f CM |
999 | } |
1000 | ||
b2950863 | 1001 | static int btree_readpage(struct file *file, struct page *page) |
5f39d397 | 1002 | { |
d1310b2e CM |
1003 | struct extent_io_tree *tree; |
1004 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
8ddc7d9c | 1005 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
5f39d397 | 1006 | } |
22b0ebda | 1007 | |
70dec807 | 1008 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
5f39d397 | 1009 | { |
98509cfc | 1010 | if (PageWriteback(page) || PageDirty(page)) |
d397712b | 1011 | return 0; |
0c4e538b | 1012 | |
f7a52a40 | 1013 | return try_release_extent_buffer(page); |
d98237b3 CM |
1014 | } |
1015 | ||
5f39d397 | 1016 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
d98237b3 | 1017 | { |
d1310b2e CM |
1018 | struct extent_io_tree *tree; |
1019 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
1020 | extent_invalidatepage(tree, page, offset); |
1021 | btree_releasepage(page, GFP_NOFS); | |
9ad6b7bc | 1022 | if (PagePrivate(page)) { |
d397712b CM |
1023 | printk(KERN_WARNING "btrfs warning page private not zero " |
1024 | "on page %llu\n", (unsigned long long)page_offset(page)); | |
9ad6b7bc CM |
1025 | ClearPagePrivate(page); |
1026 | set_page_private(page, 0); | |
1027 | page_cache_release(page); | |
1028 | } | |
d98237b3 CM |
1029 | } |
1030 | ||
0b32f4bb JB |
1031 | static int btree_set_page_dirty(struct page *page) |
1032 | { | |
bb146eb2 | 1033 | #ifdef DEBUG |
0b32f4bb JB |
1034 | struct extent_buffer *eb; |
1035 | ||
1036 | BUG_ON(!PagePrivate(page)); | |
1037 | eb = (struct extent_buffer *)page->private; | |
1038 | BUG_ON(!eb); | |
1039 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); | |
1040 | BUG_ON(!atomic_read(&eb->refs)); | |
1041 | btrfs_assert_tree_locked(eb); | |
bb146eb2 | 1042 | #endif |
0b32f4bb JB |
1043 | return __set_page_dirty_nobuffers(page); |
1044 | } | |
1045 | ||
7f09410b | 1046 | static const struct address_space_operations btree_aops = { |
d98237b3 | 1047 | .readpage = btree_readpage, |
0da5468f | 1048 | .writepages = btree_writepages, |
5f39d397 CM |
1049 | .releasepage = btree_releasepage, |
1050 | .invalidatepage = btree_invalidatepage, | |
5a92bc88 | 1051 | #ifdef CONFIG_MIGRATION |
784b4e29 | 1052 | .migratepage = btree_migratepage, |
5a92bc88 | 1053 | #endif |
0b32f4bb | 1054 | .set_page_dirty = btree_set_page_dirty, |
d98237b3 CM |
1055 | }; |
1056 | ||
ca7a79ad CM |
1057 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
1058 | u64 parent_transid) | |
090d1875 | 1059 | { |
5f39d397 CM |
1060 | struct extent_buffer *buf = NULL; |
1061 | struct inode *btree_inode = root->fs_info->btree_inode; | |
de428b63 | 1062 | int ret = 0; |
090d1875 | 1063 | |
db94535d | 1064 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
5f39d397 | 1065 | if (!buf) |
090d1875 | 1066 | return 0; |
d1310b2e | 1067 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
bb82ab88 | 1068 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
5f39d397 | 1069 | free_extent_buffer(buf); |
de428b63 | 1070 | return ret; |
090d1875 CM |
1071 | } |
1072 | ||
ab0fff03 AJ |
1073 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
1074 | int mirror_num, struct extent_buffer **eb) | |
1075 | { | |
1076 | struct extent_buffer *buf = NULL; | |
1077 | struct inode *btree_inode = root->fs_info->btree_inode; | |
1078 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; | |
1079 | int ret; | |
1080 | ||
1081 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); | |
1082 | if (!buf) | |
1083 | return 0; | |
1084 | ||
1085 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); | |
1086 | ||
1087 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, | |
1088 | btree_get_extent, mirror_num); | |
1089 | if (ret) { | |
1090 | free_extent_buffer(buf); | |
1091 | return ret; | |
1092 | } | |
1093 | ||
1094 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { | |
1095 | free_extent_buffer(buf); | |
1096 | return -EIO; | |
0b32f4bb | 1097 | } else if (extent_buffer_uptodate(buf)) { |
ab0fff03 AJ |
1098 | *eb = buf; |
1099 | } else { | |
1100 | free_extent_buffer(buf); | |
1101 | } | |
1102 | return 0; | |
1103 | } | |
1104 | ||
0999df54 CM |
1105 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
1106 | u64 bytenr, u32 blocksize) | |
1107 | { | |
1108 | struct inode *btree_inode = root->fs_info->btree_inode; | |
1109 | struct extent_buffer *eb; | |
1110 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, | |
f09d1f60 | 1111 | bytenr, blocksize); |
0999df54 CM |
1112 | return eb; |
1113 | } | |
1114 | ||
1115 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, | |
1116 | u64 bytenr, u32 blocksize) | |
1117 | { | |
1118 | struct inode *btree_inode = root->fs_info->btree_inode; | |
1119 | struct extent_buffer *eb; | |
1120 | ||
1121 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, | |
727011e0 | 1122 | bytenr, blocksize); |
0999df54 CM |
1123 | return eb; |
1124 | } | |
1125 | ||
1126 | ||
e02119d5 CM |
1127 | int btrfs_write_tree_block(struct extent_buffer *buf) |
1128 | { | |
727011e0 | 1129 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
8aa38c31 | 1130 | buf->start + buf->len - 1); |
e02119d5 CM |
1131 | } |
1132 | ||
1133 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) | |
1134 | { | |
727011e0 | 1135 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
8aa38c31 | 1136 | buf->start, buf->start + buf->len - 1); |
e02119d5 CM |
1137 | } |
1138 | ||
0999df54 | 1139 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
ca7a79ad | 1140 | u32 blocksize, u64 parent_transid) |
0999df54 CM |
1141 | { |
1142 | struct extent_buffer *buf = NULL; | |
0999df54 CM |
1143 | int ret; |
1144 | ||
0999df54 CM |
1145 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
1146 | if (!buf) | |
1147 | return NULL; | |
0999df54 | 1148 | |
ca7a79ad | 1149 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
5f39d397 | 1150 | return buf; |
ce9adaa5 | 1151 | |
eb60ceac CM |
1152 | } |
1153 | ||
d5c13f92 JM |
1154 | void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1155 | struct extent_buffer *buf) | |
ed2ff2cb | 1156 | { |
e2d84521 MX |
1157 | struct btrfs_fs_info *fs_info = root->fs_info; |
1158 | ||
55c69072 | 1159 | if (btrfs_header_generation(buf) == |
e2d84521 | 1160 | fs_info->running_transaction->transid) { |
b9447ef8 | 1161 | btrfs_assert_tree_locked(buf); |
b4ce94de | 1162 | |
b9473439 | 1163 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
e2d84521 MX |
1164 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
1165 | -buf->len, | |
1166 | fs_info->dirty_metadata_batch); | |
ed7b63eb JB |
1167 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
1168 | btrfs_set_lock_blocking(buf); | |
1169 | clear_extent_buffer_dirty(buf); | |
1170 | } | |
925baedd | 1171 | } |
5f39d397 CM |
1172 | } |
1173 | ||
143bede5 JM |
1174 | static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
1175 | u32 stripesize, struct btrfs_root *root, | |
1176 | struct btrfs_fs_info *fs_info, | |
1177 | u64 objectid) | |
d97e63b6 | 1178 | { |
cfaa7295 | 1179 | root->node = NULL; |
a28ec197 | 1180 | root->commit_root = NULL; |
db94535d CM |
1181 | root->sectorsize = sectorsize; |
1182 | root->nodesize = nodesize; | |
1183 | root->leafsize = leafsize; | |
87ee04eb | 1184 | root->stripesize = stripesize; |
123abc88 | 1185 | root->ref_cows = 0; |
0b86a832 | 1186 | root->track_dirty = 0; |
c71bf099 | 1187 | root->in_radix = 0; |
d68fc57b YZ |
1188 | root->orphan_item_inserted = 0; |
1189 | root->orphan_cleanup_state = 0; | |
0b86a832 | 1190 | |
0f7d52f4 CM |
1191 | root->objectid = objectid; |
1192 | root->last_trans = 0; | |
13a8a7c8 | 1193 | root->highest_objectid = 0; |
58176a96 | 1194 | root->name = NULL; |
6bef4d31 | 1195 | root->inode_tree = RB_ROOT; |
16cdcec7 | 1196 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
f0486c68 | 1197 | root->block_rsv = NULL; |
d68fc57b | 1198 | root->orphan_block_rsv = NULL; |
0b86a832 CM |
1199 | |
1200 | INIT_LIST_HEAD(&root->dirty_list); | |
5d4f98a2 | 1201 | INIT_LIST_HEAD(&root->root_list); |
2ab28f32 JB |
1202 | INIT_LIST_HEAD(&root->logged_list[0]); |
1203 | INIT_LIST_HEAD(&root->logged_list[1]); | |
d68fc57b | 1204 | spin_lock_init(&root->orphan_lock); |
5d4f98a2 | 1205 | spin_lock_init(&root->inode_lock); |
f0486c68 | 1206 | spin_lock_init(&root->accounting_lock); |
2ab28f32 JB |
1207 | spin_lock_init(&root->log_extents_lock[0]); |
1208 | spin_lock_init(&root->log_extents_lock[1]); | |
a2135011 | 1209 | mutex_init(&root->objectid_mutex); |
e02119d5 | 1210 | mutex_init(&root->log_mutex); |
7237f183 YZ |
1211 | init_waitqueue_head(&root->log_writer_wait); |
1212 | init_waitqueue_head(&root->log_commit_wait[0]); | |
1213 | init_waitqueue_head(&root->log_commit_wait[1]); | |
1214 | atomic_set(&root->log_commit[0], 0); | |
1215 | atomic_set(&root->log_commit[1], 0); | |
1216 | atomic_set(&root->log_writers, 0); | |
2ecb7923 | 1217 | atomic_set(&root->log_batch, 0); |
8a35d95f | 1218 | atomic_set(&root->orphan_inodes, 0); |
7237f183 | 1219 | root->log_transid = 0; |
257c62e1 | 1220 | root->last_log_commit = 0; |
d0c803c4 | 1221 | extent_io_tree_init(&root->dirty_log_pages, |
f993c883 | 1222 | fs_info->btree_inode->i_mapping); |
017e5369 | 1223 | |
3768f368 CM |
1224 | memset(&root->root_key, 0, sizeof(root->root_key)); |
1225 | memset(&root->root_item, 0, sizeof(root->root_item)); | |
6702ed49 | 1226 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
58176a96 | 1227 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
3f157a2f | 1228 | root->defrag_trans_start = fs_info->generation; |
58176a96 | 1229 | init_completion(&root->kobj_unregister); |
6702ed49 | 1230 | root->defrag_running = 0; |
4d775673 | 1231 | root->root_key.objectid = objectid; |
0ee5dc67 | 1232 | root->anon_dev = 0; |
8ea05e3a | 1233 | |
5f3ab90a | 1234 | spin_lock_init(&root->root_item_lock); |
3768f368 CM |
1235 | } |
1236 | ||
200a5c17 JM |
1237 | static int __must_check find_and_setup_root(struct btrfs_root *tree_root, |
1238 | struct btrfs_fs_info *fs_info, | |
1239 | u64 objectid, | |
1240 | struct btrfs_root *root) | |
3768f368 CM |
1241 | { |
1242 | int ret; | |
db94535d | 1243 | u32 blocksize; |
84234f3a | 1244 | u64 generation; |
3768f368 | 1245 | |
db94535d | 1246 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
87ee04eb CM |
1247 | tree_root->sectorsize, tree_root->stripesize, |
1248 | root, fs_info, objectid); | |
3768f368 CM |
1249 | ret = btrfs_find_last_root(tree_root, objectid, |
1250 | &root->root_item, &root->root_key); | |
4df27c4d YZ |
1251 | if (ret > 0) |
1252 | return -ENOENT; | |
200a5c17 JM |
1253 | else if (ret < 0) |
1254 | return ret; | |
3768f368 | 1255 | |
84234f3a | 1256 | generation = btrfs_root_generation(&root->root_item); |
db94535d | 1257 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
af31f5e5 | 1258 | root->commit_root = NULL; |
db94535d | 1259 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
84234f3a | 1260 | blocksize, generation); |
b9fab919 | 1261 | if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) { |
68433b73 | 1262 | free_extent_buffer(root->node); |
af31f5e5 | 1263 | root->node = NULL; |
68433b73 CM |
1264 | return -EIO; |
1265 | } | |
4df27c4d | 1266 | root->commit_root = btrfs_root_node(root); |
d97e63b6 CM |
1267 | return 0; |
1268 | } | |
1269 | ||
f84a8bd6 | 1270 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) |
6f07e42e AV |
1271 | { |
1272 | struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); | |
1273 | if (root) | |
1274 | root->fs_info = fs_info; | |
1275 | return root; | |
1276 | } | |
1277 | ||
20897f5c AJ |
1278 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
1279 | struct btrfs_fs_info *fs_info, | |
1280 | u64 objectid) | |
1281 | { | |
1282 | struct extent_buffer *leaf; | |
1283 | struct btrfs_root *tree_root = fs_info->tree_root; | |
1284 | struct btrfs_root *root; | |
1285 | struct btrfs_key key; | |
1286 | int ret = 0; | |
1287 | u64 bytenr; | |
6463fe58 | 1288 | uuid_le uuid; |
20897f5c AJ |
1289 | |
1290 | root = btrfs_alloc_root(fs_info); | |
1291 | if (!root) | |
1292 | return ERR_PTR(-ENOMEM); | |
1293 | ||
1294 | __setup_root(tree_root->nodesize, tree_root->leafsize, | |
1295 | tree_root->sectorsize, tree_root->stripesize, | |
1296 | root, fs_info, objectid); | |
1297 | root->root_key.objectid = objectid; | |
1298 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1299 | root->root_key.offset = 0; | |
1300 | ||
1301 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, | |
1302 | 0, objectid, NULL, 0, 0, 0); | |
1303 | if (IS_ERR(leaf)) { | |
1304 | ret = PTR_ERR(leaf); | |
1dd05682 | 1305 | leaf = NULL; |
20897f5c AJ |
1306 | goto fail; |
1307 | } | |
1308 | ||
1309 | bytenr = leaf->start; | |
1310 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); | |
1311 | btrfs_set_header_bytenr(leaf, leaf->start); | |
1312 | btrfs_set_header_generation(leaf, trans->transid); | |
1313 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1314 | btrfs_set_header_owner(leaf, objectid); | |
1315 | root->node = leaf; | |
1316 | ||
1317 | write_extent_buffer(leaf, fs_info->fsid, | |
1318 | (unsigned long)btrfs_header_fsid(leaf), | |
1319 | BTRFS_FSID_SIZE); | |
1320 | write_extent_buffer(leaf, fs_info->chunk_tree_uuid, | |
1321 | (unsigned long)btrfs_header_chunk_tree_uuid(leaf), | |
1322 | BTRFS_UUID_SIZE); | |
1323 | btrfs_mark_buffer_dirty(leaf); | |
1324 | ||
1325 | root->commit_root = btrfs_root_node(root); | |
1326 | root->track_dirty = 1; | |
1327 | ||
1328 | ||
1329 | root->root_item.flags = 0; | |
1330 | root->root_item.byte_limit = 0; | |
1331 | btrfs_set_root_bytenr(&root->root_item, leaf->start); | |
1332 | btrfs_set_root_generation(&root->root_item, trans->transid); | |
1333 | btrfs_set_root_level(&root->root_item, 0); | |
1334 | btrfs_set_root_refs(&root->root_item, 1); | |
1335 | btrfs_set_root_used(&root->root_item, leaf->len); | |
1336 | btrfs_set_root_last_snapshot(&root->root_item, 0); | |
1337 | btrfs_set_root_dirid(&root->root_item, 0); | |
6463fe58 SB |
1338 | uuid_le_gen(&uuid); |
1339 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); | |
20897f5c AJ |
1340 | root->root_item.drop_level = 0; |
1341 | ||
1342 | key.objectid = objectid; | |
1343 | key.type = BTRFS_ROOT_ITEM_KEY; | |
1344 | key.offset = 0; | |
1345 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); | |
1346 | if (ret) | |
1347 | goto fail; | |
1348 | ||
1349 | btrfs_tree_unlock(leaf); | |
1350 | ||
1dd05682 TI |
1351 | return root; |
1352 | ||
20897f5c | 1353 | fail: |
1dd05682 TI |
1354 | if (leaf) { |
1355 | btrfs_tree_unlock(leaf); | |
1356 | free_extent_buffer(leaf); | |
1357 | } | |
1358 | kfree(root); | |
20897f5c | 1359 | |
1dd05682 | 1360 | return ERR_PTR(ret); |
20897f5c AJ |
1361 | } |
1362 | ||
7237f183 YZ |
1363 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
1364 | struct btrfs_fs_info *fs_info) | |
0f7d52f4 CM |
1365 | { |
1366 | struct btrfs_root *root; | |
1367 | struct btrfs_root *tree_root = fs_info->tree_root; | |
7237f183 | 1368 | struct extent_buffer *leaf; |
e02119d5 | 1369 | |
6f07e42e | 1370 | root = btrfs_alloc_root(fs_info); |
e02119d5 | 1371 | if (!root) |
7237f183 | 1372 | return ERR_PTR(-ENOMEM); |
e02119d5 CM |
1373 | |
1374 | __setup_root(tree_root->nodesize, tree_root->leafsize, | |
1375 | tree_root->sectorsize, tree_root->stripesize, | |
1376 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); | |
1377 | ||
1378 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; | |
1379 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1380 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; | |
7237f183 YZ |
1381 | /* |
1382 | * log trees do not get reference counted because they go away | |
1383 | * before a real commit is actually done. They do store pointers | |
1384 | * to file data extents, and those reference counts still get | |
1385 | * updated (along with back refs to the log tree). | |
1386 | */ | |
e02119d5 CM |
1387 | root->ref_cows = 0; |
1388 | ||
5d4f98a2 | 1389 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
66d7e7f0 | 1390 | BTRFS_TREE_LOG_OBJECTID, NULL, |
5581a51a | 1391 | 0, 0, 0); |
7237f183 YZ |
1392 | if (IS_ERR(leaf)) { |
1393 | kfree(root); | |
1394 | return ERR_CAST(leaf); | |
1395 | } | |
e02119d5 | 1396 | |
5d4f98a2 YZ |
1397 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
1398 | btrfs_set_header_bytenr(leaf, leaf->start); | |
1399 | btrfs_set_header_generation(leaf, trans->transid); | |
1400 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1401 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); | |
7237f183 | 1402 | root->node = leaf; |
e02119d5 CM |
1403 | |
1404 | write_extent_buffer(root->node, root->fs_info->fsid, | |
1405 | (unsigned long)btrfs_header_fsid(root->node), | |
1406 | BTRFS_FSID_SIZE); | |
1407 | btrfs_mark_buffer_dirty(root->node); | |
1408 | btrfs_tree_unlock(root->node); | |
7237f183 YZ |
1409 | return root; |
1410 | } | |
1411 | ||
1412 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
1413 | struct btrfs_fs_info *fs_info) | |
1414 | { | |
1415 | struct btrfs_root *log_root; | |
1416 | ||
1417 | log_root = alloc_log_tree(trans, fs_info); | |
1418 | if (IS_ERR(log_root)) | |
1419 | return PTR_ERR(log_root); | |
1420 | WARN_ON(fs_info->log_root_tree); | |
1421 | fs_info->log_root_tree = log_root; | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
1426 | struct btrfs_root *root) | |
1427 | { | |
1428 | struct btrfs_root *log_root; | |
1429 | struct btrfs_inode_item *inode_item; | |
1430 | ||
1431 | log_root = alloc_log_tree(trans, root->fs_info); | |
1432 | if (IS_ERR(log_root)) | |
1433 | return PTR_ERR(log_root); | |
1434 | ||
1435 | log_root->last_trans = trans->transid; | |
1436 | log_root->root_key.offset = root->root_key.objectid; | |
1437 | ||
1438 | inode_item = &log_root->root_item.inode; | |
1439 | inode_item->generation = cpu_to_le64(1); | |
1440 | inode_item->size = cpu_to_le64(3); | |
1441 | inode_item->nlink = cpu_to_le32(1); | |
1442 | inode_item->nbytes = cpu_to_le64(root->leafsize); | |
1443 | inode_item->mode = cpu_to_le32(S_IFDIR | 0755); | |
1444 | ||
5d4f98a2 | 1445 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
7237f183 YZ |
1446 | |
1447 | WARN_ON(root->log_root); | |
1448 | root->log_root = log_root; | |
1449 | root->log_transid = 0; | |
257c62e1 | 1450 | root->last_log_commit = 0; |
e02119d5 CM |
1451 | return 0; |
1452 | } | |
1453 | ||
1454 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, | |
1455 | struct btrfs_key *location) | |
1456 | { | |
1457 | struct btrfs_root *root; | |
1458 | struct btrfs_fs_info *fs_info = tree_root->fs_info; | |
0f7d52f4 | 1459 | struct btrfs_path *path; |
5f39d397 | 1460 | struct extent_buffer *l; |
84234f3a | 1461 | u64 generation; |
db94535d | 1462 | u32 blocksize; |
0f7d52f4 | 1463 | int ret = 0; |
8ea05e3a | 1464 | int slot; |
0f7d52f4 | 1465 | |
6f07e42e | 1466 | root = btrfs_alloc_root(fs_info); |
0cf6c620 | 1467 | if (!root) |
0f7d52f4 | 1468 | return ERR_PTR(-ENOMEM); |
0f7d52f4 | 1469 | if (location->offset == (u64)-1) { |
db94535d | 1470 | ret = find_and_setup_root(tree_root, fs_info, |
0f7d52f4 CM |
1471 | location->objectid, root); |
1472 | if (ret) { | |
0f7d52f4 CM |
1473 | kfree(root); |
1474 | return ERR_PTR(ret); | |
1475 | } | |
13a8a7c8 | 1476 | goto out; |
0f7d52f4 CM |
1477 | } |
1478 | ||
db94535d | 1479 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
87ee04eb CM |
1480 | tree_root->sectorsize, tree_root->stripesize, |
1481 | root, fs_info, location->objectid); | |
0f7d52f4 CM |
1482 | |
1483 | path = btrfs_alloc_path(); | |
db5b493a TI |
1484 | if (!path) { |
1485 | kfree(root); | |
1486 | return ERR_PTR(-ENOMEM); | |
1487 | } | |
0f7d52f4 | 1488 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
13a8a7c8 YZ |
1489 | if (ret == 0) { |
1490 | l = path->nodes[0]; | |
8ea05e3a | 1491 | slot = path->slots[0]; |
5fbf83c1 | 1492 | btrfs_read_root_item(l, slot, &root->root_item); |
13a8a7c8 | 1493 | memcpy(&root->root_key, location, sizeof(*location)); |
0f7d52f4 | 1494 | } |
0f7d52f4 CM |
1495 | btrfs_free_path(path); |
1496 | if (ret) { | |
5e540f77 | 1497 | kfree(root); |
13a8a7c8 YZ |
1498 | if (ret > 0) |
1499 | ret = -ENOENT; | |
0f7d52f4 CM |
1500 | return ERR_PTR(ret); |
1501 | } | |
13a8a7c8 | 1502 | |
84234f3a | 1503 | generation = btrfs_root_generation(&root->root_item); |
db94535d CM |
1504 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
1505 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), | |
84234f3a | 1506 | blocksize, generation); |
416bc658 JB |
1507 | if (!root->node || !extent_buffer_uptodate(root->node)) { |
1508 | ret = (!root->node) ? -ENOMEM : -EIO; | |
1509 | ||
1510 | free_extent_buffer(root->node); | |
1511 | kfree(root); | |
1512 | return ERR_PTR(ret); | |
1513 | } | |
1514 | ||
5d4f98a2 | 1515 | root->commit_root = btrfs_root_node(root); |
13a8a7c8 | 1516 | out: |
08fe4db1 | 1517 | if (location->objectid != BTRFS_TREE_LOG_OBJECTID) { |
e02119d5 | 1518 | root->ref_cows = 1; |
08fe4db1 LZ |
1519 | btrfs_check_and_init_root_item(&root->root_item); |
1520 | } | |
13a8a7c8 | 1521 | |
5eda7b5e CM |
1522 | return root; |
1523 | } | |
1524 | ||
edbd8d4e CM |
1525 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
1526 | struct btrfs_key *location) | |
5eda7b5e CM |
1527 | { |
1528 | struct btrfs_root *root; | |
1529 | int ret; | |
1530 | ||
edbd8d4e CM |
1531 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
1532 | return fs_info->tree_root; | |
1533 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
1534 | return fs_info->extent_root; | |
8f18cf13 CM |
1535 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
1536 | return fs_info->chunk_root; | |
1537 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) | |
1538 | return fs_info->dev_root; | |
0403e47e YZ |
1539 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
1540 | return fs_info->csum_root; | |
bcef60f2 AJ |
1541 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
1542 | return fs_info->quota_root ? fs_info->quota_root : | |
1543 | ERR_PTR(-ENOENT); | |
4df27c4d YZ |
1544 | again: |
1545 | spin_lock(&fs_info->fs_roots_radix_lock); | |
5eda7b5e CM |
1546 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
1547 | (unsigned long)location->objectid); | |
4df27c4d | 1548 | spin_unlock(&fs_info->fs_roots_radix_lock); |
5eda7b5e CM |
1549 | if (root) |
1550 | return root; | |
1551 | ||
e02119d5 | 1552 | root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); |
5eda7b5e CM |
1553 | if (IS_ERR(root)) |
1554 | return root; | |
3394e160 | 1555 | |
581bb050 | 1556 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); |
581bb050 LZ |
1557 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), |
1558 | GFP_NOFS); | |
35a30d7c DS |
1559 | if (!root->free_ino_pinned || !root->free_ino_ctl) { |
1560 | ret = -ENOMEM; | |
581bb050 | 1561 | goto fail; |
35a30d7c | 1562 | } |
581bb050 LZ |
1563 | |
1564 | btrfs_init_free_ino_ctl(root); | |
1565 | mutex_init(&root->fs_commit_mutex); | |
1566 | spin_lock_init(&root->cache_lock); | |
1567 | init_waitqueue_head(&root->cache_wait); | |
1568 | ||
0ee5dc67 | 1569 | ret = get_anon_bdev(&root->anon_dev); |
ac08aedf CM |
1570 | if (ret) |
1571 | goto fail; | |
3394e160 | 1572 | |
d68fc57b YZ |
1573 | if (btrfs_root_refs(&root->root_item) == 0) { |
1574 | ret = -ENOENT; | |
1575 | goto fail; | |
1576 | } | |
1577 | ||
1578 | ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); | |
1579 | if (ret < 0) | |
1580 | goto fail; | |
1581 | if (ret == 0) | |
1582 | root->orphan_item_inserted = 1; | |
1583 | ||
4df27c4d YZ |
1584 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
1585 | if (ret) | |
1586 | goto fail; | |
1587 | ||
1588 | spin_lock(&fs_info->fs_roots_radix_lock); | |
2619ba1f CM |
1589 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
1590 | (unsigned long)root->root_key.objectid, | |
0f7d52f4 | 1591 | root); |
d68fc57b | 1592 | if (ret == 0) |
4df27c4d | 1593 | root->in_radix = 1; |
d68fc57b | 1594 | |
4df27c4d YZ |
1595 | spin_unlock(&fs_info->fs_roots_radix_lock); |
1596 | radix_tree_preload_end(); | |
0f7d52f4 | 1597 | if (ret) { |
4df27c4d YZ |
1598 | if (ret == -EEXIST) { |
1599 | free_fs_root(root); | |
1600 | goto again; | |
1601 | } | |
1602 | goto fail; | |
0f7d52f4 | 1603 | } |
4df27c4d YZ |
1604 | |
1605 | ret = btrfs_find_dead_roots(fs_info->tree_root, | |
1606 | root->root_key.objectid); | |
1607 | WARN_ON(ret); | |
edbd8d4e | 1608 | return root; |
4df27c4d YZ |
1609 | fail: |
1610 | free_fs_root(root); | |
1611 | return ERR_PTR(ret); | |
edbd8d4e CM |
1612 | } |
1613 | ||
04160088 CM |
1614 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
1615 | { | |
1616 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; | |
1617 | int ret = 0; | |
04160088 CM |
1618 | struct btrfs_device *device; |
1619 | struct backing_dev_info *bdi; | |
b7967db7 | 1620 | |
1f78160c XG |
1621 | rcu_read_lock(); |
1622 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { | |
dfe25020 CM |
1623 | if (!device->bdev) |
1624 | continue; | |
04160088 CM |
1625 | bdi = blk_get_backing_dev_info(device->bdev); |
1626 | if (bdi && bdi_congested(bdi, bdi_bits)) { | |
1627 | ret = 1; | |
1628 | break; | |
1629 | } | |
1630 | } | |
1f78160c | 1631 | rcu_read_unlock(); |
04160088 CM |
1632 | return ret; |
1633 | } | |
1634 | ||
ad081f14 JA |
1635 | /* |
1636 | * If this fails, caller must call bdi_destroy() to get rid of the | |
1637 | * bdi again. | |
1638 | */ | |
04160088 CM |
1639 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
1640 | { | |
ad081f14 JA |
1641 | int err; |
1642 | ||
1643 | bdi->capabilities = BDI_CAP_MAP_COPY; | |
e6d086d8 | 1644 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
ad081f14 JA |
1645 | if (err) |
1646 | return err; | |
1647 | ||
4575c9cc | 1648 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
04160088 CM |
1649 | bdi->congested_fn = btrfs_congested_fn; |
1650 | bdi->congested_data = info; | |
1651 | return 0; | |
1652 | } | |
1653 | ||
8b712842 CM |
1654 | /* |
1655 | * called by the kthread helper functions to finally call the bio end_io | |
1656 | * functions. This is where read checksum verification actually happens | |
1657 | */ | |
1658 | static void end_workqueue_fn(struct btrfs_work *work) | |
ce9adaa5 | 1659 | { |
ce9adaa5 | 1660 | struct bio *bio; |
8b712842 CM |
1661 | struct end_io_wq *end_io_wq; |
1662 | struct btrfs_fs_info *fs_info; | |
ce9adaa5 | 1663 | int error; |
ce9adaa5 | 1664 | |
8b712842 CM |
1665 | end_io_wq = container_of(work, struct end_io_wq, work); |
1666 | bio = end_io_wq->bio; | |
1667 | fs_info = end_io_wq->info; | |
ce9adaa5 | 1668 | |
8b712842 CM |
1669 | error = end_io_wq->error; |
1670 | bio->bi_private = end_io_wq->private; | |
1671 | bio->bi_end_io = end_io_wq->end_io; | |
1672 | kfree(end_io_wq); | |
8b712842 | 1673 | bio_endio(bio, error); |
44b8bd7e CM |
1674 | } |
1675 | ||
a74a4b97 CM |
1676 | static int cleaner_kthread(void *arg) |
1677 | { | |
1678 | struct btrfs_root *root = arg; | |
d0278245 | 1679 | int again; |
a74a4b97 CM |
1680 | |
1681 | do { | |
d0278245 | 1682 | again = 0; |
a74a4b97 | 1683 | |
d0278245 | 1684 | /* Make the cleaner go to sleep early. */ |
babbf170 | 1685 | if (btrfs_need_cleaner_sleep(root)) |
d0278245 MX |
1686 | goto sleep; |
1687 | ||
1688 | if (!mutex_trylock(&root->fs_info->cleaner_mutex)) | |
1689 | goto sleep; | |
1690 | ||
dc7f370c MX |
1691 | /* |
1692 | * Avoid the problem that we change the status of the fs | |
1693 | * during the above check and trylock. | |
1694 | */ | |
babbf170 | 1695 | if (btrfs_need_cleaner_sleep(root)) { |
dc7f370c MX |
1696 | mutex_unlock(&root->fs_info->cleaner_mutex); |
1697 | goto sleep; | |
1698 | } | |
1699 | ||
d0278245 MX |
1700 | btrfs_run_delayed_iputs(root); |
1701 | again = btrfs_clean_one_deleted_snapshot(root); | |
1702 | mutex_unlock(&root->fs_info->cleaner_mutex); | |
1703 | ||
1704 | /* | |
05323cd1 MX |
1705 | * The defragger has dealt with the R/O remount and umount, |
1706 | * needn't do anything special here. | |
d0278245 MX |
1707 | */ |
1708 | btrfs_run_defrag_inodes(root->fs_info); | |
1709 | sleep: | |
9d1a2a3a | 1710 | if (!try_to_freeze() && !again) { |
a74a4b97 | 1711 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa YZ |
1712 | if (!kthread_should_stop()) |
1713 | schedule(); | |
a74a4b97 CM |
1714 | __set_current_state(TASK_RUNNING); |
1715 | } | |
1716 | } while (!kthread_should_stop()); | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | static int transaction_kthread(void *arg) | |
1721 | { | |
1722 | struct btrfs_root *root = arg; | |
1723 | struct btrfs_trans_handle *trans; | |
1724 | struct btrfs_transaction *cur; | |
8929ecfa | 1725 | u64 transid; |
a74a4b97 CM |
1726 | unsigned long now; |
1727 | unsigned long delay; | |
914b2007 | 1728 | bool cannot_commit; |
a74a4b97 CM |
1729 | |
1730 | do { | |
914b2007 | 1731 | cannot_commit = false; |
a74a4b97 | 1732 | delay = HZ * 30; |
a74a4b97 CM |
1733 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
1734 | ||
a4abeea4 | 1735 | spin_lock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1736 | cur = root->fs_info->running_transaction; |
1737 | if (!cur) { | |
a4abeea4 | 1738 | spin_unlock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1739 | goto sleep; |
1740 | } | |
31153d81 | 1741 | |
a74a4b97 | 1742 | now = get_seconds(); |
8929ecfa YZ |
1743 | if (!cur->blocked && |
1744 | (now < cur->start_time || now - cur->start_time < 30)) { | |
a4abeea4 | 1745 | spin_unlock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1746 | delay = HZ * 5; |
1747 | goto sleep; | |
1748 | } | |
8929ecfa | 1749 | transid = cur->transid; |
a4abeea4 | 1750 | spin_unlock(&root->fs_info->trans_lock); |
56bec294 | 1751 | |
79787eaa | 1752 | /* If the file system is aborted, this will always fail. */ |
354aa0fb | 1753 | trans = btrfs_attach_transaction(root); |
914b2007 | 1754 | if (IS_ERR(trans)) { |
354aa0fb MX |
1755 | if (PTR_ERR(trans) != -ENOENT) |
1756 | cannot_commit = true; | |
79787eaa | 1757 | goto sleep; |
914b2007 | 1758 | } |
8929ecfa | 1759 | if (transid == trans->transid) { |
79787eaa | 1760 | btrfs_commit_transaction(trans, root); |
8929ecfa YZ |
1761 | } else { |
1762 | btrfs_end_transaction(trans, root); | |
1763 | } | |
a74a4b97 CM |
1764 | sleep: |
1765 | wake_up_process(root->fs_info->cleaner_kthread); | |
1766 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); | |
1767 | ||
a0acae0e | 1768 | if (!try_to_freeze()) { |
a74a4b97 | 1769 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa | 1770 | if (!kthread_should_stop() && |
914b2007 JK |
1771 | (!btrfs_transaction_blocked(root->fs_info) || |
1772 | cannot_commit)) | |
8929ecfa | 1773 | schedule_timeout(delay); |
a74a4b97 CM |
1774 | __set_current_state(TASK_RUNNING); |
1775 | } | |
1776 | } while (!kthread_should_stop()); | |
1777 | return 0; | |
1778 | } | |
1779 | ||
af31f5e5 CM |
1780 | /* |
1781 | * this will find the highest generation in the array of | |
1782 | * root backups. The index of the highest array is returned, | |
1783 | * or -1 if we can't find anything. | |
1784 | * | |
1785 | * We check to make sure the array is valid by comparing the | |
1786 | * generation of the latest root in the array with the generation | |
1787 | * in the super block. If they don't match we pitch it. | |
1788 | */ | |
1789 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) | |
1790 | { | |
1791 | u64 cur; | |
1792 | int newest_index = -1; | |
1793 | struct btrfs_root_backup *root_backup; | |
1794 | int i; | |
1795 | ||
1796 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { | |
1797 | root_backup = info->super_copy->super_roots + i; | |
1798 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1799 | if (cur == newest_gen) | |
1800 | newest_index = i; | |
1801 | } | |
1802 | ||
1803 | /* check to see if we actually wrapped around */ | |
1804 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { | |
1805 | root_backup = info->super_copy->super_roots; | |
1806 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1807 | if (cur == newest_gen) | |
1808 | newest_index = 0; | |
1809 | } | |
1810 | return newest_index; | |
1811 | } | |
1812 | ||
1813 | ||
1814 | /* | |
1815 | * find the oldest backup so we know where to store new entries | |
1816 | * in the backup array. This will set the backup_root_index | |
1817 | * field in the fs_info struct | |
1818 | */ | |
1819 | static void find_oldest_super_backup(struct btrfs_fs_info *info, | |
1820 | u64 newest_gen) | |
1821 | { | |
1822 | int newest_index = -1; | |
1823 | ||
1824 | newest_index = find_newest_super_backup(info, newest_gen); | |
1825 | /* if there was garbage in there, just move along */ | |
1826 | if (newest_index == -1) { | |
1827 | info->backup_root_index = 0; | |
1828 | } else { | |
1829 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * copy all the root pointers into the super backup array. | |
1835 | * this will bump the backup pointer by one when it is | |
1836 | * done | |
1837 | */ | |
1838 | static void backup_super_roots(struct btrfs_fs_info *info) | |
1839 | { | |
1840 | int next_backup; | |
1841 | struct btrfs_root_backup *root_backup; | |
1842 | int last_backup; | |
1843 | ||
1844 | next_backup = info->backup_root_index; | |
1845 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
1846 | BTRFS_NUM_BACKUP_ROOTS; | |
1847 | ||
1848 | /* | |
1849 | * just overwrite the last backup if we're at the same generation | |
1850 | * this happens only at umount | |
1851 | */ | |
1852 | root_backup = info->super_for_commit->super_roots + last_backup; | |
1853 | if (btrfs_backup_tree_root_gen(root_backup) == | |
1854 | btrfs_header_generation(info->tree_root->node)) | |
1855 | next_backup = last_backup; | |
1856 | ||
1857 | root_backup = info->super_for_commit->super_roots + next_backup; | |
1858 | ||
1859 | /* | |
1860 | * make sure all of our padding and empty slots get zero filled | |
1861 | * regardless of which ones we use today | |
1862 | */ | |
1863 | memset(root_backup, 0, sizeof(*root_backup)); | |
1864 | ||
1865 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1866 | ||
1867 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); | |
1868 | btrfs_set_backup_tree_root_gen(root_backup, | |
1869 | btrfs_header_generation(info->tree_root->node)); | |
1870 | ||
1871 | btrfs_set_backup_tree_root_level(root_backup, | |
1872 | btrfs_header_level(info->tree_root->node)); | |
1873 | ||
1874 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); | |
1875 | btrfs_set_backup_chunk_root_gen(root_backup, | |
1876 | btrfs_header_generation(info->chunk_root->node)); | |
1877 | btrfs_set_backup_chunk_root_level(root_backup, | |
1878 | btrfs_header_level(info->chunk_root->node)); | |
1879 | ||
1880 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); | |
1881 | btrfs_set_backup_extent_root_gen(root_backup, | |
1882 | btrfs_header_generation(info->extent_root->node)); | |
1883 | btrfs_set_backup_extent_root_level(root_backup, | |
1884 | btrfs_header_level(info->extent_root->node)); | |
1885 | ||
7c7e82a7 CM |
1886 | /* |
1887 | * we might commit during log recovery, which happens before we set | |
1888 | * the fs_root. Make sure it is valid before we fill it in. | |
1889 | */ | |
1890 | if (info->fs_root && info->fs_root->node) { | |
1891 | btrfs_set_backup_fs_root(root_backup, | |
1892 | info->fs_root->node->start); | |
1893 | btrfs_set_backup_fs_root_gen(root_backup, | |
af31f5e5 | 1894 | btrfs_header_generation(info->fs_root->node)); |
7c7e82a7 | 1895 | btrfs_set_backup_fs_root_level(root_backup, |
af31f5e5 | 1896 | btrfs_header_level(info->fs_root->node)); |
7c7e82a7 | 1897 | } |
af31f5e5 CM |
1898 | |
1899 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); | |
1900 | btrfs_set_backup_dev_root_gen(root_backup, | |
1901 | btrfs_header_generation(info->dev_root->node)); | |
1902 | btrfs_set_backup_dev_root_level(root_backup, | |
1903 | btrfs_header_level(info->dev_root->node)); | |
1904 | ||
1905 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); | |
1906 | btrfs_set_backup_csum_root_gen(root_backup, | |
1907 | btrfs_header_generation(info->csum_root->node)); | |
1908 | btrfs_set_backup_csum_root_level(root_backup, | |
1909 | btrfs_header_level(info->csum_root->node)); | |
1910 | ||
1911 | btrfs_set_backup_total_bytes(root_backup, | |
1912 | btrfs_super_total_bytes(info->super_copy)); | |
1913 | btrfs_set_backup_bytes_used(root_backup, | |
1914 | btrfs_super_bytes_used(info->super_copy)); | |
1915 | btrfs_set_backup_num_devices(root_backup, | |
1916 | btrfs_super_num_devices(info->super_copy)); | |
1917 | ||
1918 | /* | |
1919 | * if we don't copy this out to the super_copy, it won't get remembered | |
1920 | * for the next commit | |
1921 | */ | |
1922 | memcpy(&info->super_copy->super_roots, | |
1923 | &info->super_for_commit->super_roots, | |
1924 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); | |
1925 | } | |
1926 | ||
1927 | /* | |
1928 | * this copies info out of the root backup array and back into | |
1929 | * the in-memory super block. It is meant to help iterate through | |
1930 | * the array, so you send it the number of backups you've already | |
1931 | * tried and the last backup index you used. | |
1932 | * | |
1933 | * this returns -1 when it has tried all the backups | |
1934 | */ | |
1935 | static noinline int next_root_backup(struct btrfs_fs_info *info, | |
1936 | struct btrfs_super_block *super, | |
1937 | int *num_backups_tried, int *backup_index) | |
1938 | { | |
1939 | struct btrfs_root_backup *root_backup; | |
1940 | int newest = *backup_index; | |
1941 | ||
1942 | if (*num_backups_tried == 0) { | |
1943 | u64 gen = btrfs_super_generation(super); | |
1944 | ||
1945 | newest = find_newest_super_backup(info, gen); | |
1946 | if (newest == -1) | |
1947 | return -1; | |
1948 | ||
1949 | *backup_index = newest; | |
1950 | *num_backups_tried = 1; | |
1951 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { | |
1952 | /* we've tried all the backups, all done */ | |
1953 | return -1; | |
1954 | } else { | |
1955 | /* jump to the next oldest backup */ | |
1956 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
1957 | BTRFS_NUM_BACKUP_ROOTS; | |
1958 | *backup_index = newest; | |
1959 | *num_backups_tried += 1; | |
1960 | } | |
1961 | root_backup = super->super_roots + newest; | |
1962 | ||
1963 | btrfs_set_super_generation(super, | |
1964 | btrfs_backup_tree_root_gen(root_backup)); | |
1965 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); | |
1966 | btrfs_set_super_root_level(super, | |
1967 | btrfs_backup_tree_root_level(root_backup)); | |
1968 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); | |
1969 | ||
1970 | /* | |
1971 | * fixme: the total bytes and num_devices need to match or we should | |
1972 | * need a fsck | |
1973 | */ | |
1974 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); | |
1975 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); | |
1976 | return 0; | |
1977 | } | |
1978 | ||
7abadb64 LB |
1979 | /* helper to cleanup workers */ |
1980 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) | |
1981 | { | |
1982 | btrfs_stop_workers(&fs_info->generic_worker); | |
1983 | btrfs_stop_workers(&fs_info->fixup_workers); | |
1984 | btrfs_stop_workers(&fs_info->delalloc_workers); | |
1985 | btrfs_stop_workers(&fs_info->workers); | |
1986 | btrfs_stop_workers(&fs_info->endio_workers); | |
1987 | btrfs_stop_workers(&fs_info->endio_meta_workers); | |
1988 | btrfs_stop_workers(&fs_info->endio_raid56_workers); | |
1989 | btrfs_stop_workers(&fs_info->rmw_workers); | |
1990 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); | |
1991 | btrfs_stop_workers(&fs_info->endio_write_workers); | |
1992 | btrfs_stop_workers(&fs_info->endio_freespace_worker); | |
1993 | btrfs_stop_workers(&fs_info->submit_workers); | |
1994 | btrfs_stop_workers(&fs_info->delayed_workers); | |
1995 | btrfs_stop_workers(&fs_info->caching_workers); | |
1996 | btrfs_stop_workers(&fs_info->readahead_workers); | |
1997 | btrfs_stop_workers(&fs_info->flush_workers); | |
2f232036 | 1998 | btrfs_stop_workers(&fs_info->qgroup_rescan_workers); |
7abadb64 LB |
1999 | } |
2000 | ||
af31f5e5 CM |
2001 | /* helper to cleanup tree roots */ |
2002 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) | |
2003 | { | |
2004 | free_extent_buffer(info->tree_root->node); | |
2005 | free_extent_buffer(info->tree_root->commit_root); | |
af31f5e5 CM |
2006 | info->tree_root->node = NULL; |
2007 | info->tree_root->commit_root = NULL; | |
655b09fe JB |
2008 | |
2009 | if (info->dev_root) { | |
2010 | free_extent_buffer(info->dev_root->node); | |
2011 | free_extent_buffer(info->dev_root->commit_root); | |
2012 | info->dev_root->node = NULL; | |
2013 | info->dev_root->commit_root = NULL; | |
2014 | } | |
2015 | if (info->extent_root) { | |
2016 | free_extent_buffer(info->extent_root->node); | |
2017 | free_extent_buffer(info->extent_root->commit_root); | |
2018 | info->extent_root->node = NULL; | |
2019 | info->extent_root->commit_root = NULL; | |
2020 | } | |
2021 | if (info->csum_root) { | |
2022 | free_extent_buffer(info->csum_root->node); | |
2023 | free_extent_buffer(info->csum_root->commit_root); | |
2024 | info->csum_root->node = NULL; | |
2025 | info->csum_root->commit_root = NULL; | |
2026 | } | |
bcef60f2 | 2027 | if (info->quota_root) { |
655b09fe JB |
2028 | free_extent_buffer(info->quota_root->node); |
2029 | free_extent_buffer(info->quota_root->commit_root); | |
bcef60f2 AJ |
2030 | info->quota_root->node = NULL; |
2031 | info->quota_root->commit_root = NULL; | |
2032 | } | |
af31f5e5 CM |
2033 | if (chunk_root) { |
2034 | free_extent_buffer(info->chunk_root->node); | |
2035 | free_extent_buffer(info->chunk_root->commit_root); | |
2036 | info->chunk_root->node = NULL; | |
2037 | info->chunk_root->commit_root = NULL; | |
2038 | } | |
2039 | } | |
2040 | ||
171f6537 JB |
2041 | static void del_fs_roots(struct btrfs_fs_info *fs_info) |
2042 | { | |
2043 | int ret; | |
2044 | struct btrfs_root *gang[8]; | |
2045 | int i; | |
2046 | ||
2047 | while (!list_empty(&fs_info->dead_roots)) { | |
2048 | gang[0] = list_entry(fs_info->dead_roots.next, | |
2049 | struct btrfs_root, root_list); | |
2050 | list_del(&gang[0]->root_list); | |
2051 | ||
2052 | if (gang[0]->in_radix) { | |
2053 | btrfs_free_fs_root(fs_info, gang[0]); | |
2054 | } else { | |
2055 | free_extent_buffer(gang[0]->node); | |
2056 | free_extent_buffer(gang[0]->commit_root); | |
2057 | kfree(gang[0]); | |
2058 | } | |
2059 | } | |
2060 | ||
2061 | while (1) { | |
2062 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
2063 | (void **)gang, 0, | |
2064 | ARRAY_SIZE(gang)); | |
2065 | if (!ret) | |
2066 | break; | |
2067 | for (i = 0; i < ret; i++) | |
2068 | btrfs_free_fs_root(fs_info, gang[i]); | |
2069 | } | |
2070 | } | |
af31f5e5 | 2071 | |
ad2b2c80 AV |
2072 | int open_ctree(struct super_block *sb, |
2073 | struct btrfs_fs_devices *fs_devices, | |
2074 | char *options) | |
2e635a27 | 2075 | { |
db94535d CM |
2076 | u32 sectorsize; |
2077 | u32 nodesize; | |
2078 | u32 leafsize; | |
2079 | u32 blocksize; | |
87ee04eb | 2080 | u32 stripesize; |
84234f3a | 2081 | u64 generation; |
f2b636e8 | 2082 | u64 features; |
3de4586c | 2083 | struct btrfs_key location; |
a061fc8d | 2084 | struct buffer_head *bh; |
4d34b278 | 2085 | struct btrfs_super_block *disk_super; |
815745cf | 2086 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
f84a8bd6 | 2087 | struct btrfs_root *tree_root; |
4d34b278 ID |
2088 | struct btrfs_root *extent_root; |
2089 | struct btrfs_root *csum_root; | |
2090 | struct btrfs_root *chunk_root; | |
2091 | struct btrfs_root *dev_root; | |
bcef60f2 | 2092 | struct btrfs_root *quota_root; |
e02119d5 | 2093 | struct btrfs_root *log_tree_root; |
eb60ceac | 2094 | int ret; |
e58ca020 | 2095 | int err = -EINVAL; |
af31f5e5 CM |
2096 | int num_backups_tried = 0; |
2097 | int backup_index = 0; | |
4543df7e | 2098 | |
f84a8bd6 | 2099 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); |
6f07e42e AV |
2100 | extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info); |
2101 | csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info); | |
2102 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); | |
2103 | dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info); | |
bcef60f2 | 2104 | quota_root = fs_info->quota_root = btrfs_alloc_root(fs_info); |
8790d502 | 2105 | |
f84a8bd6 | 2106 | if (!tree_root || !extent_root || !csum_root || |
bcef60f2 | 2107 | !chunk_root || !dev_root || !quota_root) { |
39279cc3 CM |
2108 | err = -ENOMEM; |
2109 | goto fail; | |
2110 | } | |
76dda93c YZ |
2111 | |
2112 | ret = init_srcu_struct(&fs_info->subvol_srcu); | |
2113 | if (ret) { | |
2114 | err = ret; | |
2115 | goto fail; | |
2116 | } | |
2117 | ||
2118 | ret = setup_bdi(fs_info, &fs_info->bdi); | |
2119 | if (ret) { | |
2120 | err = ret; | |
2121 | goto fail_srcu; | |
2122 | } | |
2123 | ||
e2d84521 MX |
2124 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); |
2125 | if (ret) { | |
2126 | err = ret; | |
2127 | goto fail_bdi; | |
2128 | } | |
2129 | fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * | |
2130 | (1 + ilog2(nr_cpu_ids)); | |
2131 | ||
963d678b MX |
2132 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); |
2133 | if (ret) { | |
2134 | err = ret; | |
2135 | goto fail_dirty_metadata_bytes; | |
2136 | } | |
2137 | ||
76dda93c YZ |
2138 | fs_info->btree_inode = new_inode(sb); |
2139 | if (!fs_info->btree_inode) { | |
2140 | err = -ENOMEM; | |
963d678b | 2141 | goto fail_delalloc_bytes; |
76dda93c YZ |
2142 | } |
2143 | ||
a6591715 | 2144 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
1561deda | 2145 | |
76dda93c | 2146 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
8fd17795 | 2147 | INIT_LIST_HEAD(&fs_info->trans_list); |
facda1e7 | 2148 | INIT_LIST_HEAD(&fs_info->dead_roots); |
24bbcf04 | 2149 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
ea8c2819 | 2150 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
11833d66 | 2151 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
1832a6d5 | 2152 | spin_lock_init(&fs_info->delalloc_lock); |
a4abeea4 | 2153 | spin_lock_init(&fs_info->trans_lock); |
76dda93c | 2154 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
24bbcf04 | 2155 | spin_lock_init(&fs_info->delayed_iput_lock); |
4cb5300b | 2156 | spin_lock_init(&fs_info->defrag_inodes_lock); |
2bf64758 | 2157 | spin_lock_init(&fs_info->free_chunk_lock); |
f29021b2 | 2158 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
ceda0864 | 2159 | spin_lock_init(&fs_info->super_lock); |
f29021b2 | 2160 | rwlock_init(&fs_info->tree_mod_log_lock); |
7585717f | 2161 | mutex_init(&fs_info->reloc_mutex); |
de98ced9 | 2162 | seqlock_init(&fs_info->profiles_lock); |
19c00ddc | 2163 | |
58176a96 | 2164 | init_completion(&fs_info->kobj_unregister); |
0b86a832 | 2165 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
6324fbf3 | 2166 | INIT_LIST_HEAD(&fs_info->space_info); |
f29021b2 | 2167 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
0b86a832 | 2168 | btrfs_mapping_init(&fs_info->mapping_tree); |
66d8f3dd MX |
2169 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
2170 | BTRFS_BLOCK_RSV_GLOBAL); | |
2171 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, | |
2172 | BTRFS_BLOCK_RSV_DELALLOC); | |
2173 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); | |
2174 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); | |
2175 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); | |
2176 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, | |
2177 | BTRFS_BLOCK_RSV_DELOPS); | |
cb03c743 | 2178 | atomic_set(&fs_info->nr_async_submits, 0); |
771ed689 | 2179 | atomic_set(&fs_info->async_delalloc_pages, 0); |
8c8bee1d | 2180 | atomic_set(&fs_info->async_submit_draining, 0); |
0986fe9e | 2181 | atomic_set(&fs_info->nr_async_bios, 0); |
4cb5300b | 2182 | atomic_set(&fs_info->defrag_running, 0); |
fc36ed7e | 2183 | atomic64_set(&fs_info->tree_mod_seq, 0); |
e20d96d6 | 2184 | fs_info->sb = sb; |
6f568d35 | 2185 | fs_info->max_inline = 8192 * 1024; |
9ed74f2d | 2186 | fs_info->metadata_ratio = 0; |
4cb5300b | 2187 | fs_info->defrag_inodes = RB_ROOT; |
a4abeea4 | 2188 | fs_info->trans_no_join = 0; |
2bf64758 | 2189 | fs_info->free_chunk_space = 0; |
f29021b2 | 2190 | fs_info->tree_mod_log = RB_ROOT; |
c8b97818 | 2191 | |
90519d66 AJ |
2192 | /* readahead state */ |
2193 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); | |
2194 | spin_lock_init(&fs_info->reada_lock); | |
c8b97818 | 2195 | |
b34b086c CM |
2196 | fs_info->thread_pool_size = min_t(unsigned long, |
2197 | num_online_cpus() + 2, 8); | |
0afbaf8c | 2198 | |
3eaa2885 CM |
2199 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
2200 | spin_lock_init(&fs_info->ordered_extent_lock); | |
16cdcec7 MX |
2201 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
2202 | GFP_NOFS); | |
2203 | if (!fs_info->delayed_root) { | |
2204 | err = -ENOMEM; | |
2205 | goto fail_iput; | |
2206 | } | |
2207 | btrfs_init_delayed_root(fs_info->delayed_root); | |
3eaa2885 | 2208 | |
a2de733c AJ |
2209 | mutex_init(&fs_info->scrub_lock); |
2210 | atomic_set(&fs_info->scrubs_running, 0); | |
2211 | atomic_set(&fs_info->scrub_pause_req, 0); | |
2212 | atomic_set(&fs_info->scrubs_paused, 0); | |
2213 | atomic_set(&fs_info->scrub_cancel_req, 0); | |
2214 | init_waitqueue_head(&fs_info->scrub_pause_wait); | |
2215 | init_rwsem(&fs_info->scrub_super_lock); | |
2216 | fs_info->scrub_workers_refcnt = 0; | |
21adbd5c SB |
2217 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2218 | fs_info->check_integrity_print_mask = 0; | |
2219 | #endif | |
a2de733c | 2220 | |
c9e9f97b ID |
2221 | spin_lock_init(&fs_info->balance_lock); |
2222 | mutex_init(&fs_info->balance_mutex); | |
837d5b6e ID |
2223 | atomic_set(&fs_info->balance_running, 0); |
2224 | atomic_set(&fs_info->balance_pause_req, 0); | |
a7e99c69 | 2225 | atomic_set(&fs_info->balance_cancel_req, 0); |
c9e9f97b | 2226 | fs_info->balance_ctl = NULL; |
837d5b6e | 2227 | init_waitqueue_head(&fs_info->balance_wait_q); |
a2de733c | 2228 | |
a061fc8d CM |
2229 | sb->s_blocksize = 4096; |
2230 | sb->s_blocksize_bits = blksize_bits(4096); | |
32a88aa1 | 2231 | sb->s_bdi = &fs_info->bdi; |
a061fc8d | 2232 | |
76dda93c | 2233 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
bfe86848 | 2234 | set_nlink(fs_info->btree_inode, 1); |
0afbaf8c CM |
2235 | /* |
2236 | * we set the i_size on the btree inode to the max possible int. | |
2237 | * the real end of the address space is determined by all of | |
2238 | * the devices in the system | |
2239 | */ | |
2240 | fs_info->btree_inode->i_size = OFFSET_MAX; | |
d98237b3 | 2241 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
04160088 CM |
2242 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
2243 | ||
5d4f98a2 | 2244 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
d1310b2e | 2245 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
f993c883 | 2246 | fs_info->btree_inode->i_mapping); |
0b32f4bb | 2247 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
a8067e02 | 2248 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
d1310b2e CM |
2249 | |
2250 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; | |
0da5468f | 2251 | |
76dda93c YZ |
2252 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
2253 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, | |
2254 | sizeof(struct btrfs_key)); | |
72ac3c0d JB |
2255 | set_bit(BTRFS_INODE_DUMMY, |
2256 | &BTRFS_I(fs_info->btree_inode)->runtime_flags); | |
c65ddb52 | 2257 | insert_inode_hash(fs_info->btree_inode); |
76dda93c | 2258 | |
0f9dd46c | 2259 | spin_lock_init(&fs_info->block_group_cache_lock); |
6bef4d31 | 2260 | fs_info->block_group_cache_tree = RB_ROOT; |
a1897fdd | 2261 | fs_info->first_logical_byte = (u64)-1; |
0f9dd46c | 2262 | |
11833d66 | 2263 | extent_io_tree_init(&fs_info->freed_extents[0], |
f993c883 | 2264 | fs_info->btree_inode->i_mapping); |
11833d66 | 2265 | extent_io_tree_init(&fs_info->freed_extents[1], |
f993c883 | 2266 | fs_info->btree_inode->i_mapping); |
11833d66 | 2267 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
e66f709b | 2268 | fs_info->do_barriers = 1; |
e18e4809 | 2269 | |
39279cc3 | 2270 | |
5a3f23d5 | 2271 | mutex_init(&fs_info->ordered_operations_mutex); |
e02119d5 | 2272 | mutex_init(&fs_info->tree_log_mutex); |
925baedd | 2273 | mutex_init(&fs_info->chunk_mutex); |
a74a4b97 CM |
2274 | mutex_init(&fs_info->transaction_kthread_mutex); |
2275 | mutex_init(&fs_info->cleaner_mutex); | |
7d9eb12c | 2276 | mutex_init(&fs_info->volume_mutex); |
276e680d | 2277 | init_rwsem(&fs_info->extent_commit_sem); |
c71bf099 | 2278 | init_rwsem(&fs_info->cleanup_work_sem); |
76dda93c | 2279 | init_rwsem(&fs_info->subvol_sem); |
e922e087 SB |
2280 | fs_info->dev_replace.lock_owner = 0; |
2281 | atomic_set(&fs_info->dev_replace.nesting_level, 0); | |
2282 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); | |
2283 | mutex_init(&fs_info->dev_replace.lock_management_lock); | |
2284 | mutex_init(&fs_info->dev_replace.lock); | |
fa9c0d79 | 2285 | |
416ac51d | 2286 | spin_lock_init(&fs_info->qgroup_lock); |
f2f6ed3d | 2287 | mutex_init(&fs_info->qgroup_ioctl_lock); |
416ac51d AJ |
2288 | fs_info->qgroup_tree = RB_ROOT; |
2289 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); | |
2290 | fs_info->qgroup_seq = 1; | |
2291 | fs_info->quota_enabled = 0; | |
2292 | fs_info->pending_quota_state = 0; | |
1e8f9158 | 2293 | fs_info->qgroup_ulist = NULL; |
2f232036 | 2294 | mutex_init(&fs_info->qgroup_rescan_lock); |
416ac51d | 2295 | |
fa9c0d79 CM |
2296 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
2297 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); | |
2298 | ||
e6dcd2dc | 2299 | init_waitqueue_head(&fs_info->transaction_throttle); |
f9295749 | 2300 | init_waitqueue_head(&fs_info->transaction_wait); |
bb9c12c9 | 2301 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
4854ddd0 | 2302 | init_waitqueue_head(&fs_info->async_submit_wait); |
3768f368 | 2303 | |
53b381b3 DW |
2304 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
2305 | if (ret) { | |
83c8266a | 2306 | err = ret; |
53b381b3 DW |
2307 | goto fail_alloc; |
2308 | } | |
2309 | ||
0b86a832 | 2310 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
2c90e5d6 | 2311 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
7eccb903 | 2312 | |
3c4bb26b | 2313 | invalidate_bdev(fs_devices->latest_bdev); |
1104a885 DS |
2314 | |
2315 | /* | |
2316 | * Read super block and check the signature bytes only | |
2317 | */ | |
a512bbf8 | 2318 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
20b45077 DY |
2319 | if (!bh) { |
2320 | err = -EINVAL; | |
16cdcec7 | 2321 | goto fail_alloc; |
20b45077 | 2322 | } |
39279cc3 | 2323 | |
1104a885 DS |
2324 | /* |
2325 | * We want to check superblock checksum, the type is stored inside. | |
2326 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). | |
2327 | */ | |
2328 | if (btrfs_check_super_csum(bh->b_data)) { | |
2329 | printk(KERN_ERR "btrfs: superblock checksum mismatch\n"); | |
2330 | err = -EINVAL; | |
2331 | goto fail_alloc; | |
2332 | } | |
2333 | ||
2334 | /* | |
2335 | * super_copy is zeroed at allocation time and we never touch the | |
2336 | * following bytes up to INFO_SIZE, the checksum is calculated from | |
2337 | * the whole block of INFO_SIZE | |
2338 | */ | |
6c41761f DS |
2339 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
2340 | memcpy(fs_info->super_for_commit, fs_info->super_copy, | |
2341 | sizeof(*fs_info->super_for_commit)); | |
a061fc8d | 2342 | brelse(bh); |
5f39d397 | 2343 | |
6c41761f | 2344 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
0b86a832 | 2345 | |
1104a885 DS |
2346 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
2347 | if (ret) { | |
2348 | printk(KERN_ERR "btrfs: superblock contains fatal errors\n"); | |
2349 | err = -EINVAL; | |
2350 | goto fail_alloc; | |
2351 | } | |
2352 | ||
6c41761f | 2353 | disk_super = fs_info->super_copy; |
0f7d52f4 | 2354 | if (!btrfs_super_root(disk_super)) |
16cdcec7 | 2355 | goto fail_alloc; |
0f7d52f4 | 2356 | |
acce952b | 2357 | /* check FS state, whether FS is broken. */ |
87533c47 MX |
2358 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
2359 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); | |
acce952b | 2360 | |
af31f5e5 CM |
2361 | /* |
2362 | * run through our array of backup supers and setup | |
2363 | * our ring pointer to the oldest one | |
2364 | */ | |
2365 | generation = btrfs_super_generation(disk_super); | |
2366 | find_oldest_super_backup(fs_info, generation); | |
2367 | ||
75e7cb7f LB |
2368 | /* |
2369 | * In the long term, we'll store the compression type in the super | |
2370 | * block, and it'll be used for per file compression control. | |
2371 | */ | |
2372 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; | |
2373 | ||
2b82032c YZ |
2374 | ret = btrfs_parse_options(tree_root, options); |
2375 | if (ret) { | |
2376 | err = ret; | |
16cdcec7 | 2377 | goto fail_alloc; |
2b82032c | 2378 | } |
dfe25020 | 2379 | |
f2b636e8 JB |
2380 | features = btrfs_super_incompat_flags(disk_super) & |
2381 | ~BTRFS_FEATURE_INCOMPAT_SUPP; | |
2382 | if (features) { | |
2383 | printk(KERN_ERR "BTRFS: couldn't mount because of " | |
2384 | "unsupported optional features (%Lx).\n", | |
21380931 | 2385 | (unsigned long long)features); |
f2b636e8 | 2386 | err = -EINVAL; |
16cdcec7 | 2387 | goto fail_alloc; |
f2b636e8 JB |
2388 | } |
2389 | ||
727011e0 CM |
2390 | if (btrfs_super_leafsize(disk_super) != |
2391 | btrfs_super_nodesize(disk_super)) { | |
2392 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " | |
2393 | "blocksizes don't match. node %d leaf %d\n", | |
2394 | btrfs_super_nodesize(disk_super), | |
2395 | btrfs_super_leafsize(disk_super)); | |
2396 | err = -EINVAL; | |
2397 | goto fail_alloc; | |
2398 | } | |
2399 | if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
2400 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " | |
2401 | "blocksize (%d) was too large\n", | |
2402 | btrfs_super_leafsize(disk_super)); | |
2403 | err = -EINVAL; | |
2404 | goto fail_alloc; | |
2405 | } | |
2406 | ||
5d4f98a2 | 2407 | features = btrfs_super_incompat_flags(disk_super); |
a6fa6fae | 2408 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
69e380d1 | 2409 | if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) |
a6fa6fae | 2410 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
727011e0 | 2411 | |
3173a18f JB |
2412 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
2413 | printk(KERN_ERR "btrfs: has skinny extents\n"); | |
2414 | ||
727011e0 CM |
2415 | /* |
2416 | * flag our filesystem as having big metadata blocks if | |
2417 | * they are bigger than the page size | |
2418 | */ | |
2419 | if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { | |
2420 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) | |
2421 | printk(KERN_INFO "btrfs flagging fs with big metadata feature\n"); | |
2422 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; | |
2423 | } | |
2424 | ||
bc3f116f CM |
2425 | nodesize = btrfs_super_nodesize(disk_super); |
2426 | leafsize = btrfs_super_leafsize(disk_super); | |
2427 | sectorsize = btrfs_super_sectorsize(disk_super); | |
2428 | stripesize = btrfs_super_stripesize(disk_super); | |
e2d84521 | 2429 | fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); |
963d678b | 2430 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
bc3f116f CM |
2431 | |
2432 | /* | |
2433 | * mixed block groups end up with duplicate but slightly offset | |
2434 | * extent buffers for the same range. It leads to corruptions | |
2435 | */ | |
2436 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && | |
2437 | (sectorsize != leafsize)) { | |
2438 | printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes " | |
2439 | "are not allowed for mixed block groups on %s\n", | |
2440 | sb->s_id); | |
2441 | goto fail_alloc; | |
2442 | } | |
2443 | ||
ceda0864 MX |
2444 | /* |
2445 | * Needn't use the lock because there is no other task which will | |
2446 | * update the flag. | |
2447 | */ | |
a6fa6fae | 2448 | btrfs_set_super_incompat_flags(disk_super, features); |
5d4f98a2 | 2449 | |
f2b636e8 JB |
2450 | features = btrfs_super_compat_ro_flags(disk_super) & |
2451 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; | |
2452 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
2453 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " | |
2454 | "unsupported option features (%Lx).\n", | |
21380931 | 2455 | (unsigned long long)features); |
f2b636e8 | 2456 | err = -EINVAL; |
16cdcec7 | 2457 | goto fail_alloc; |
f2b636e8 | 2458 | } |
61d92c32 CM |
2459 | |
2460 | btrfs_init_workers(&fs_info->generic_worker, | |
2461 | "genwork", 1, NULL); | |
2462 | ||
5443be45 | 2463 | btrfs_init_workers(&fs_info->workers, "worker", |
61d92c32 CM |
2464 | fs_info->thread_pool_size, |
2465 | &fs_info->generic_worker); | |
c8b97818 | 2466 | |
771ed689 | 2467 | btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", |
61d92c32 CM |
2468 | fs_info->thread_pool_size, |
2469 | &fs_info->generic_worker); | |
771ed689 | 2470 | |
8ccf6f19 MX |
2471 | btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", |
2472 | fs_info->thread_pool_size, | |
2473 | &fs_info->generic_worker); | |
2474 | ||
5443be45 | 2475 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
b720d209 | 2476 | min_t(u64, fs_devices->num_devices, |
61d92c32 CM |
2477 | fs_info->thread_pool_size), |
2478 | &fs_info->generic_worker); | |
61b49440 | 2479 | |
bab39bf9 JB |
2480 | btrfs_init_workers(&fs_info->caching_workers, "cache", |
2481 | 2, &fs_info->generic_worker); | |
2482 | ||
61b49440 CM |
2483 | /* a higher idle thresh on the submit workers makes it much more |
2484 | * likely that bios will be send down in a sane order to the | |
2485 | * devices | |
2486 | */ | |
2487 | fs_info->submit_workers.idle_thresh = 64; | |
53863232 | 2488 | |
771ed689 | 2489 | fs_info->workers.idle_thresh = 16; |
4a69a410 | 2490 | fs_info->workers.ordered = 1; |
61b49440 | 2491 | |
771ed689 CM |
2492 | fs_info->delalloc_workers.idle_thresh = 2; |
2493 | fs_info->delalloc_workers.ordered = 1; | |
2494 | ||
61d92c32 CM |
2495 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, |
2496 | &fs_info->generic_worker); | |
5443be45 | 2497 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
61d92c32 CM |
2498 | fs_info->thread_pool_size, |
2499 | &fs_info->generic_worker); | |
d20f7043 | 2500 | btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", |
61d92c32 CM |
2501 | fs_info->thread_pool_size, |
2502 | &fs_info->generic_worker); | |
cad321ad | 2503 | btrfs_init_workers(&fs_info->endio_meta_write_workers, |
61d92c32 CM |
2504 | "endio-meta-write", fs_info->thread_pool_size, |
2505 | &fs_info->generic_worker); | |
53b381b3 DW |
2506 | btrfs_init_workers(&fs_info->endio_raid56_workers, |
2507 | "endio-raid56", fs_info->thread_pool_size, | |
2508 | &fs_info->generic_worker); | |
2509 | btrfs_init_workers(&fs_info->rmw_workers, | |
2510 | "rmw", fs_info->thread_pool_size, | |
2511 | &fs_info->generic_worker); | |
5443be45 | 2512 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
61d92c32 CM |
2513 | fs_info->thread_pool_size, |
2514 | &fs_info->generic_worker); | |
0cb59c99 JB |
2515 | btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", |
2516 | 1, &fs_info->generic_worker); | |
16cdcec7 MX |
2517 | btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", |
2518 | fs_info->thread_pool_size, | |
2519 | &fs_info->generic_worker); | |
90519d66 AJ |
2520 | btrfs_init_workers(&fs_info->readahead_workers, "readahead", |
2521 | fs_info->thread_pool_size, | |
2522 | &fs_info->generic_worker); | |
2f232036 JS |
2523 | btrfs_init_workers(&fs_info->qgroup_rescan_workers, "qgroup-rescan", 1, |
2524 | &fs_info->generic_worker); | |
61b49440 CM |
2525 | |
2526 | /* | |
2527 | * endios are largely parallel and should have a very | |
2528 | * low idle thresh | |
2529 | */ | |
2530 | fs_info->endio_workers.idle_thresh = 4; | |
b51912c9 | 2531 | fs_info->endio_meta_workers.idle_thresh = 4; |
53b381b3 DW |
2532 | fs_info->endio_raid56_workers.idle_thresh = 4; |
2533 | fs_info->rmw_workers.idle_thresh = 2; | |
b51912c9 | 2534 | |
9042846b CM |
2535 | fs_info->endio_write_workers.idle_thresh = 2; |
2536 | fs_info->endio_meta_write_workers.idle_thresh = 2; | |
90519d66 | 2537 | fs_info->readahead_workers.idle_thresh = 2; |
9042846b | 2538 | |
0dc3b84a JB |
2539 | /* |
2540 | * btrfs_start_workers can really only fail because of ENOMEM so just | |
2541 | * return -ENOMEM if any of these fail. | |
2542 | */ | |
2543 | ret = btrfs_start_workers(&fs_info->workers); | |
2544 | ret |= btrfs_start_workers(&fs_info->generic_worker); | |
2545 | ret |= btrfs_start_workers(&fs_info->submit_workers); | |
2546 | ret |= btrfs_start_workers(&fs_info->delalloc_workers); | |
2547 | ret |= btrfs_start_workers(&fs_info->fixup_workers); | |
2548 | ret |= btrfs_start_workers(&fs_info->endio_workers); | |
2549 | ret |= btrfs_start_workers(&fs_info->endio_meta_workers); | |
53b381b3 DW |
2550 | ret |= btrfs_start_workers(&fs_info->rmw_workers); |
2551 | ret |= btrfs_start_workers(&fs_info->endio_raid56_workers); | |
0dc3b84a JB |
2552 | ret |= btrfs_start_workers(&fs_info->endio_meta_write_workers); |
2553 | ret |= btrfs_start_workers(&fs_info->endio_write_workers); | |
2554 | ret |= btrfs_start_workers(&fs_info->endio_freespace_worker); | |
2555 | ret |= btrfs_start_workers(&fs_info->delayed_workers); | |
2556 | ret |= btrfs_start_workers(&fs_info->caching_workers); | |
2557 | ret |= btrfs_start_workers(&fs_info->readahead_workers); | |
8ccf6f19 | 2558 | ret |= btrfs_start_workers(&fs_info->flush_workers); |
2f232036 | 2559 | ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers); |
0dc3b84a | 2560 | if (ret) { |
fed425c7 | 2561 | err = -ENOMEM; |
0dc3b84a JB |
2562 | goto fail_sb_buffer; |
2563 | } | |
4543df7e | 2564 | |
4575c9cc | 2565 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
c8b97818 CM |
2566 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
2567 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); | |
4575c9cc | 2568 | |
db94535d CM |
2569 | tree_root->nodesize = nodesize; |
2570 | tree_root->leafsize = leafsize; | |
2571 | tree_root->sectorsize = sectorsize; | |
87ee04eb | 2572 | tree_root->stripesize = stripesize; |
a061fc8d CM |
2573 | |
2574 | sb->s_blocksize = sectorsize; | |
2575 | sb->s_blocksize_bits = blksize_bits(sectorsize); | |
db94535d | 2576 | |
cdb4c574 | 2577 | if (disk_super->magic != cpu_to_le64(BTRFS_MAGIC)) { |
d397712b | 2578 | printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); |
39279cc3 CM |
2579 | goto fail_sb_buffer; |
2580 | } | |
19c00ddc | 2581 | |
8d082fb7 LB |
2582 | if (sectorsize != PAGE_SIZE) { |
2583 | printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) " | |
2584 | "found on %s\n", (unsigned long)sectorsize, sb->s_id); | |
941b2ddf KM |
2585 | goto fail_sb_buffer; |
2586 | } | |
2587 | ||
925baedd | 2588 | mutex_lock(&fs_info->chunk_mutex); |
e4404d6e | 2589 | ret = btrfs_read_sys_array(tree_root); |
925baedd | 2590 | mutex_unlock(&fs_info->chunk_mutex); |
84eed90f | 2591 | if (ret) { |
d397712b CM |
2592 | printk(KERN_WARNING "btrfs: failed to read the system " |
2593 | "array on %s\n", sb->s_id); | |
5d4f98a2 | 2594 | goto fail_sb_buffer; |
84eed90f | 2595 | } |
0b86a832 CM |
2596 | |
2597 | blocksize = btrfs_level_size(tree_root, | |
2598 | btrfs_super_chunk_root_level(disk_super)); | |
84234f3a | 2599 | generation = btrfs_super_chunk_root_generation(disk_super); |
0b86a832 CM |
2600 | |
2601 | __setup_root(nodesize, leafsize, sectorsize, stripesize, | |
2602 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); | |
2603 | ||
2604 | chunk_root->node = read_tree_block(chunk_root, | |
2605 | btrfs_super_chunk_root(disk_super), | |
84234f3a | 2606 | blocksize, generation); |
416bc658 JB |
2607 | if (!chunk_root->node || |
2608 | !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { | |
83121942 DW |
2609 | printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", |
2610 | sb->s_id); | |
af31f5e5 | 2611 | goto fail_tree_roots; |
83121942 | 2612 | } |
5d4f98a2 YZ |
2613 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
2614 | chunk_root->commit_root = btrfs_root_node(chunk_root); | |
0b86a832 | 2615 | |
e17cade2 | 2616 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
d397712b CM |
2617 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
2618 | BTRFS_UUID_SIZE); | |
e17cade2 | 2619 | |
0b86a832 | 2620 | ret = btrfs_read_chunk_tree(chunk_root); |
2b82032c | 2621 | if (ret) { |
d397712b CM |
2622 | printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", |
2623 | sb->s_id); | |
af31f5e5 | 2624 | goto fail_tree_roots; |
2b82032c | 2625 | } |
0b86a832 | 2626 | |
8dabb742 SB |
2627 | /* |
2628 | * keep the device that is marked to be the target device for the | |
2629 | * dev_replace procedure | |
2630 | */ | |
2631 | btrfs_close_extra_devices(fs_info, fs_devices, 0); | |
dfe25020 | 2632 | |
a6b0d5c8 CM |
2633 | if (!fs_devices->latest_bdev) { |
2634 | printk(KERN_CRIT "btrfs: failed to read devices on %s\n", | |
2635 | sb->s_id); | |
2636 | goto fail_tree_roots; | |
2637 | } | |
2638 | ||
af31f5e5 | 2639 | retry_root_backup: |
db94535d CM |
2640 | blocksize = btrfs_level_size(tree_root, |
2641 | btrfs_super_root_level(disk_super)); | |
84234f3a | 2642 | generation = btrfs_super_generation(disk_super); |
0b86a832 | 2643 | |
e20d96d6 | 2644 | tree_root->node = read_tree_block(tree_root, |
db94535d | 2645 | btrfs_super_root(disk_super), |
84234f3a | 2646 | blocksize, generation); |
af31f5e5 CM |
2647 | if (!tree_root->node || |
2648 | !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { | |
83121942 DW |
2649 | printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", |
2650 | sb->s_id); | |
af31f5e5 CM |
2651 | |
2652 | goto recovery_tree_root; | |
83121942 | 2653 | } |
af31f5e5 | 2654 | |
5d4f98a2 YZ |
2655 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
2656 | tree_root->commit_root = btrfs_root_node(tree_root); | |
db94535d CM |
2657 | |
2658 | ret = find_and_setup_root(tree_root, fs_info, | |
e20d96d6 | 2659 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
0b86a832 | 2660 | if (ret) |
af31f5e5 | 2661 | goto recovery_tree_root; |
0b86a832 CM |
2662 | extent_root->track_dirty = 1; |
2663 | ||
2664 | ret = find_and_setup_root(tree_root, fs_info, | |
2665 | BTRFS_DEV_TREE_OBJECTID, dev_root); | |
0b86a832 | 2666 | if (ret) |
af31f5e5 | 2667 | goto recovery_tree_root; |
5d4f98a2 | 2668 | dev_root->track_dirty = 1; |
3768f368 | 2669 | |
d20f7043 CM |
2670 | ret = find_and_setup_root(tree_root, fs_info, |
2671 | BTRFS_CSUM_TREE_OBJECTID, csum_root); | |
2672 | if (ret) | |
af31f5e5 | 2673 | goto recovery_tree_root; |
d20f7043 CM |
2674 | csum_root->track_dirty = 1; |
2675 | ||
bcef60f2 AJ |
2676 | ret = find_and_setup_root(tree_root, fs_info, |
2677 | BTRFS_QUOTA_TREE_OBJECTID, quota_root); | |
2678 | if (ret) { | |
2679 | kfree(quota_root); | |
2680 | quota_root = fs_info->quota_root = NULL; | |
2681 | } else { | |
2682 | quota_root->track_dirty = 1; | |
2683 | fs_info->quota_enabled = 1; | |
2684 | fs_info->pending_quota_state = 1; | |
2685 | } | |
2686 | ||
8929ecfa YZ |
2687 | fs_info->generation = generation; |
2688 | fs_info->last_trans_committed = generation; | |
8929ecfa | 2689 | |
68310a5e ID |
2690 | ret = btrfs_recover_balance(fs_info); |
2691 | if (ret) { | |
2692 | printk(KERN_WARNING "btrfs: failed to recover balance\n"); | |
2693 | goto fail_block_groups; | |
2694 | } | |
2695 | ||
733f4fbb SB |
2696 | ret = btrfs_init_dev_stats(fs_info); |
2697 | if (ret) { | |
2698 | printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n", | |
2699 | ret); | |
2700 | goto fail_block_groups; | |
2701 | } | |
2702 | ||
8dabb742 SB |
2703 | ret = btrfs_init_dev_replace(fs_info); |
2704 | if (ret) { | |
2705 | pr_err("btrfs: failed to init dev_replace: %d\n", ret); | |
2706 | goto fail_block_groups; | |
2707 | } | |
2708 | ||
2709 | btrfs_close_extra_devices(fs_info, fs_devices, 1); | |
2710 | ||
c59021f8 | 2711 | ret = btrfs_init_space_info(fs_info); |
2712 | if (ret) { | |
2713 | printk(KERN_ERR "Failed to initial space info: %d\n", ret); | |
2714 | goto fail_block_groups; | |
2715 | } | |
2716 | ||
1b1d1f66 JB |
2717 | ret = btrfs_read_block_groups(extent_root); |
2718 | if (ret) { | |
2719 | printk(KERN_ERR "Failed to read block groups: %d\n", ret); | |
2720 | goto fail_block_groups; | |
2721 | } | |
5af3e8cc SB |
2722 | fs_info->num_tolerated_disk_barrier_failures = |
2723 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); | |
292fd7fc SB |
2724 | if (fs_info->fs_devices->missing_devices > |
2725 | fs_info->num_tolerated_disk_barrier_failures && | |
2726 | !(sb->s_flags & MS_RDONLY)) { | |
2727 | printk(KERN_WARNING | |
2728 | "Btrfs: too many missing devices, writeable mount is not allowed\n"); | |
2729 | goto fail_block_groups; | |
2730 | } | |
9078a3e1 | 2731 | |
a74a4b97 CM |
2732 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
2733 | "btrfs-cleaner"); | |
57506d50 | 2734 | if (IS_ERR(fs_info->cleaner_kthread)) |
1b1d1f66 | 2735 | goto fail_block_groups; |
a74a4b97 CM |
2736 | |
2737 | fs_info->transaction_kthread = kthread_run(transaction_kthread, | |
2738 | tree_root, | |
2739 | "btrfs-transaction"); | |
57506d50 | 2740 | if (IS_ERR(fs_info->transaction_kthread)) |
3f157a2f | 2741 | goto fail_cleaner; |
a74a4b97 | 2742 | |
c289811c CM |
2743 | if (!btrfs_test_opt(tree_root, SSD) && |
2744 | !btrfs_test_opt(tree_root, NOSSD) && | |
2745 | !fs_info->fs_devices->rotating) { | |
2746 | printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " | |
2747 | "mode\n"); | |
2748 | btrfs_set_opt(fs_info->mount_opt, SSD); | |
2749 | } | |
2750 | ||
21adbd5c SB |
2751 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2752 | if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { | |
2753 | ret = btrfsic_mount(tree_root, fs_devices, | |
2754 | btrfs_test_opt(tree_root, | |
2755 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? | |
2756 | 1 : 0, | |
2757 | fs_info->check_integrity_print_mask); | |
2758 | if (ret) | |
2759 | printk(KERN_WARNING "btrfs: failed to initialize" | |
2760 | " integrity check module %s\n", sb->s_id); | |
2761 | } | |
2762 | #endif | |
bcef60f2 AJ |
2763 | ret = btrfs_read_qgroup_config(fs_info); |
2764 | if (ret) | |
2765 | goto fail_trans_kthread; | |
21adbd5c | 2766 | |
acce952b | 2767 | /* do not make disk changes in broken FS */ |
68ce9682 | 2768 | if (btrfs_super_log_root(disk_super) != 0) { |
e02119d5 CM |
2769 | u64 bytenr = btrfs_super_log_root(disk_super); |
2770 | ||
7c2ca468 | 2771 | if (fs_devices->rw_devices == 0) { |
d397712b CM |
2772 | printk(KERN_WARNING "Btrfs log replay required " |
2773 | "on RO media\n"); | |
7c2ca468 | 2774 | err = -EIO; |
bcef60f2 | 2775 | goto fail_qgroup; |
7c2ca468 | 2776 | } |
e02119d5 CM |
2777 | blocksize = |
2778 | btrfs_level_size(tree_root, | |
2779 | btrfs_super_log_root_level(disk_super)); | |
d18a2c44 | 2780 | |
6f07e42e | 2781 | log_tree_root = btrfs_alloc_root(fs_info); |
676e4c86 DC |
2782 | if (!log_tree_root) { |
2783 | err = -ENOMEM; | |
bcef60f2 | 2784 | goto fail_qgroup; |
676e4c86 | 2785 | } |
e02119d5 CM |
2786 | |
2787 | __setup_root(nodesize, leafsize, sectorsize, stripesize, | |
2788 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); | |
2789 | ||
2790 | log_tree_root->node = read_tree_block(tree_root, bytenr, | |
84234f3a YZ |
2791 | blocksize, |
2792 | generation + 1); | |
416bc658 JB |
2793 | if (!log_tree_root->node || |
2794 | !extent_buffer_uptodate(log_tree_root->node)) { | |
2795 | printk(KERN_ERR "btrfs: failed to read log tree\n"); | |
2796 | free_extent_buffer(log_tree_root->node); | |
2797 | kfree(log_tree_root); | |
2798 | goto fail_trans_kthread; | |
2799 | } | |
79787eaa | 2800 | /* returns with log_tree_root freed on success */ |
e02119d5 | 2801 | ret = btrfs_recover_log_trees(log_tree_root); |
79787eaa JM |
2802 | if (ret) { |
2803 | btrfs_error(tree_root->fs_info, ret, | |
2804 | "Failed to recover log tree"); | |
2805 | free_extent_buffer(log_tree_root->node); | |
2806 | kfree(log_tree_root); | |
2807 | goto fail_trans_kthread; | |
2808 | } | |
e556ce2c YZ |
2809 | |
2810 | if (sb->s_flags & MS_RDONLY) { | |
79787eaa JM |
2811 | ret = btrfs_commit_super(tree_root); |
2812 | if (ret) | |
2813 | goto fail_trans_kthread; | |
e556ce2c | 2814 | } |
e02119d5 | 2815 | } |
1a40e23b | 2816 | |
76dda93c | 2817 | ret = btrfs_find_orphan_roots(tree_root); |
79787eaa JM |
2818 | if (ret) |
2819 | goto fail_trans_kthread; | |
76dda93c | 2820 | |
7c2ca468 | 2821 | if (!(sb->s_flags & MS_RDONLY)) { |
d68fc57b | 2822 | ret = btrfs_cleanup_fs_roots(fs_info); |
44c44af2 ID |
2823 | if (ret) |
2824 | goto fail_trans_kthread; | |
d68fc57b | 2825 | |
5d4f98a2 | 2826 | ret = btrfs_recover_relocation(tree_root); |
d7ce5843 MX |
2827 | if (ret < 0) { |
2828 | printk(KERN_WARNING | |
2829 | "btrfs: failed to recover relocation\n"); | |
2830 | err = -EINVAL; | |
bcef60f2 | 2831 | goto fail_qgroup; |
d7ce5843 | 2832 | } |
7c2ca468 | 2833 | } |
1a40e23b | 2834 | |
3de4586c CM |
2835 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
2836 | location.type = BTRFS_ROOT_ITEM_KEY; | |
2837 | location.offset = (u64)-1; | |
2838 | ||
3de4586c | 2839 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
3140c9a3 DC |
2840 | if (IS_ERR(fs_info->fs_root)) { |
2841 | err = PTR_ERR(fs_info->fs_root); | |
bcef60f2 | 2842 | goto fail_qgroup; |
3140c9a3 | 2843 | } |
c289811c | 2844 | |
2b6ba629 ID |
2845 | if (sb->s_flags & MS_RDONLY) |
2846 | return 0; | |
59641015 | 2847 | |
2b6ba629 ID |
2848 | down_read(&fs_info->cleanup_work_sem); |
2849 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || | |
2850 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { | |
e3acc2a6 | 2851 | up_read(&fs_info->cleanup_work_sem); |
2b6ba629 ID |
2852 | close_ctree(tree_root); |
2853 | return ret; | |
2854 | } | |
2855 | up_read(&fs_info->cleanup_work_sem); | |
59641015 | 2856 | |
2b6ba629 ID |
2857 | ret = btrfs_resume_balance_async(fs_info); |
2858 | if (ret) { | |
2859 | printk(KERN_WARNING "btrfs: failed to resume balance\n"); | |
2860 | close_ctree(tree_root); | |
2861 | return ret; | |
e3acc2a6 JB |
2862 | } |
2863 | ||
8dabb742 SB |
2864 | ret = btrfs_resume_dev_replace_async(fs_info); |
2865 | if (ret) { | |
2866 | pr_warn("btrfs: failed to resume dev_replace\n"); | |
2867 | close_ctree(tree_root); | |
2868 | return ret; | |
2869 | } | |
2870 | ||
ad2b2c80 | 2871 | return 0; |
39279cc3 | 2872 | |
bcef60f2 AJ |
2873 | fail_qgroup: |
2874 | btrfs_free_qgroup_config(fs_info); | |
7c2ca468 CM |
2875 | fail_trans_kthread: |
2876 | kthread_stop(fs_info->transaction_kthread); | |
54067ae9 | 2877 | btrfs_cleanup_transaction(fs_info->tree_root); |
7b5ff90e | 2878 | del_fs_roots(fs_info); |
3f157a2f | 2879 | fail_cleaner: |
a74a4b97 | 2880 | kthread_stop(fs_info->cleaner_kthread); |
7c2ca468 CM |
2881 | |
2882 | /* | |
2883 | * make sure we're done with the btree inode before we stop our | |
2884 | * kthreads | |
2885 | */ | |
2886 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); | |
7c2ca468 | 2887 | |
1b1d1f66 | 2888 | fail_block_groups: |
54067ae9 | 2889 | btrfs_put_block_group_cache(fs_info); |
1b1d1f66 | 2890 | btrfs_free_block_groups(fs_info); |
af31f5e5 CM |
2891 | |
2892 | fail_tree_roots: | |
2893 | free_root_pointers(fs_info, 1); | |
2b8195bb | 2894 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
af31f5e5 | 2895 | |
39279cc3 | 2896 | fail_sb_buffer: |
7abadb64 | 2897 | btrfs_stop_all_workers(fs_info); |
16cdcec7 | 2898 | fail_alloc: |
4543df7e | 2899 | fail_iput: |
586e46e2 ID |
2900 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
2901 | ||
4543df7e | 2902 | iput(fs_info->btree_inode); |
963d678b MX |
2903 | fail_delalloc_bytes: |
2904 | percpu_counter_destroy(&fs_info->delalloc_bytes); | |
e2d84521 MX |
2905 | fail_dirty_metadata_bytes: |
2906 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); | |
ad081f14 | 2907 | fail_bdi: |
7e662854 | 2908 | bdi_destroy(&fs_info->bdi); |
76dda93c YZ |
2909 | fail_srcu: |
2910 | cleanup_srcu_struct(&fs_info->subvol_srcu); | |
7e662854 | 2911 | fail: |
53b381b3 | 2912 | btrfs_free_stripe_hash_table(fs_info); |
586e46e2 | 2913 | btrfs_close_devices(fs_info->fs_devices); |
ad2b2c80 | 2914 | return err; |
af31f5e5 CM |
2915 | |
2916 | recovery_tree_root: | |
af31f5e5 CM |
2917 | if (!btrfs_test_opt(tree_root, RECOVERY)) |
2918 | goto fail_tree_roots; | |
2919 | ||
2920 | free_root_pointers(fs_info, 0); | |
2921 | ||
2922 | /* don't use the log in recovery mode, it won't be valid */ | |
2923 | btrfs_set_super_log_root(disk_super, 0); | |
2924 | ||
2925 | /* we can't trust the free space cache either */ | |
2926 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); | |
2927 | ||
2928 | ret = next_root_backup(fs_info, fs_info->super_copy, | |
2929 | &num_backups_tried, &backup_index); | |
2930 | if (ret == -1) | |
2931 | goto fail_block_groups; | |
2932 | goto retry_root_backup; | |
eb60ceac CM |
2933 | } |
2934 | ||
f2984462 CM |
2935 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
2936 | { | |
f2984462 CM |
2937 | if (uptodate) { |
2938 | set_buffer_uptodate(bh); | |
2939 | } else { | |
442a4f63 SB |
2940 | struct btrfs_device *device = (struct btrfs_device *) |
2941 | bh->b_private; | |
2942 | ||
606686ee JB |
2943 | printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to " |
2944 | "I/O error on %s\n", | |
2945 | rcu_str_deref(device->name)); | |
1259ab75 CM |
2946 | /* note, we dont' set_buffer_write_io_error because we have |
2947 | * our own ways of dealing with the IO errors | |
2948 | */ | |
f2984462 | 2949 | clear_buffer_uptodate(bh); |
442a4f63 | 2950 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
f2984462 CM |
2951 | } |
2952 | unlock_buffer(bh); | |
2953 | put_bh(bh); | |
2954 | } | |
2955 | ||
a512bbf8 YZ |
2956 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
2957 | { | |
2958 | struct buffer_head *bh; | |
2959 | struct buffer_head *latest = NULL; | |
2960 | struct btrfs_super_block *super; | |
2961 | int i; | |
2962 | u64 transid = 0; | |
2963 | u64 bytenr; | |
2964 | ||
2965 | /* we would like to check all the supers, but that would make | |
2966 | * a btrfs mount succeed after a mkfs from a different FS. | |
2967 | * So, we need to add a special mount option to scan for | |
2968 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead | |
2969 | */ | |
2970 | for (i = 0; i < 1; i++) { | |
2971 | bytenr = btrfs_sb_offset(i); | |
2972 | if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) | |
2973 | break; | |
2974 | bh = __bread(bdev, bytenr / 4096, 4096); | |
2975 | if (!bh) | |
2976 | continue; | |
2977 | ||
2978 | super = (struct btrfs_super_block *)bh->b_data; | |
2979 | if (btrfs_super_bytenr(super) != bytenr || | |
cdb4c574 | 2980 | super->magic != cpu_to_le64(BTRFS_MAGIC)) { |
a512bbf8 YZ |
2981 | brelse(bh); |
2982 | continue; | |
2983 | } | |
2984 | ||
2985 | if (!latest || btrfs_super_generation(super) > transid) { | |
2986 | brelse(latest); | |
2987 | latest = bh; | |
2988 | transid = btrfs_super_generation(super); | |
2989 | } else { | |
2990 | brelse(bh); | |
2991 | } | |
2992 | } | |
2993 | return latest; | |
2994 | } | |
2995 | ||
4eedeb75 HH |
2996 | /* |
2997 | * this should be called twice, once with wait == 0 and | |
2998 | * once with wait == 1. When wait == 0 is done, all the buffer heads | |
2999 | * we write are pinned. | |
3000 | * | |
3001 | * They are released when wait == 1 is done. | |
3002 | * max_mirrors must be the same for both runs, and it indicates how | |
3003 | * many supers on this one device should be written. | |
3004 | * | |
3005 | * max_mirrors == 0 means to write them all. | |
3006 | */ | |
a512bbf8 YZ |
3007 | static int write_dev_supers(struct btrfs_device *device, |
3008 | struct btrfs_super_block *sb, | |
3009 | int do_barriers, int wait, int max_mirrors) | |
3010 | { | |
3011 | struct buffer_head *bh; | |
3012 | int i; | |
3013 | int ret; | |
3014 | int errors = 0; | |
3015 | u32 crc; | |
3016 | u64 bytenr; | |
a512bbf8 YZ |
3017 | |
3018 | if (max_mirrors == 0) | |
3019 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; | |
3020 | ||
a512bbf8 YZ |
3021 | for (i = 0; i < max_mirrors; i++) { |
3022 | bytenr = btrfs_sb_offset(i); | |
3023 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) | |
3024 | break; | |
3025 | ||
3026 | if (wait) { | |
3027 | bh = __find_get_block(device->bdev, bytenr / 4096, | |
3028 | BTRFS_SUPER_INFO_SIZE); | |
634554dc JB |
3029 | if (!bh) { |
3030 | errors++; | |
3031 | continue; | |
3032 | } | |
a512bbf8 | 3033 | wait_on_buffer(bh); |
4eedeb75 HH |
3034 | if (!buffer_uptodate(bh)) |
3035 | errors++; | |
3036 | ||
3037 | /* drop our reference */ | |
3038 | brelse(bh); | |
3039 | ||
3040 | /* drop the reference from the wait == 0 run */ | |
3041 | brelse(bh); | |
3042 | continue; | |
a512bbf8 YZ |
3043 | } else { |
3044 | btrfs_set_super_bytenr(sb, bytenr); | |
3045 | ||
3046 | crc = ~(u32)0; | |
b0496686 | 3047 | crc = btrfs_csum_data((char *)sb + |
a512bbf8 YZ |
3048 | BTRFS_CSUM_SIZE, crc, |
3049 | BTRFS_SUPER_INFO_SIZE - | |
3050 | BTRFS_CSUM_SIZE); | |
3051 | btrfs_csum_final(crc, sb->csum); | |
3052 | ||
4eedeb75 HH |
3053 | /* |
3054 | * one reference for us, and we leave it for the | |
3055 | * caller | |
3056 | */ | |
a512bbf8 YZ |
3057 | bh = __getblk(device->bdev, bytenr / 4096, |
3058 | BTRFS_SUPER_INFO_SIZE); | |
634554dc JB |
3059 | if (!bh) { |
3060 | printk(KERN_ERR "btrfs: couldn't get super " | |
3061 | "buffer head for bytenr %Lu\n", bytenr); | |
3062 | errors++; | |
3063 | continue; | |
3064 | } | |
3065 | ||
a512bbf8 YZ |
3066 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
3067 | ||
4eedeb75 | 3068 | /* one reference for submit_bh */ |
a512bbf8 | 3069 | get_bh(bh); |
4eedeb75 HH |
3070 | |
3071 | set_buffer_uptodate(bh); | |
a512bbf8 YZ |
3072 | lock_buffer(bh); |
3073 | bh->b_end_io = btrfs_end_buffer_write_sync; | |
442a4f63 | 3074 | bh->b_private = device; |
a512bbf8 YZ |
3075 | } |
3076 | ||
387125fc CM |
3077 | /* |
3078 | * we fua the first super. The others we allow | |
3079 | * to go down lazy. | |
3080 | */ | |
21adbd5c | 3081 | ret = btrfsic_submit_bh(WRITE_FUA, bh); |
4eedeb75 | 3082 | if (ret) |
a512bbf8 | 3083 | errors++; |
a512bbf8 YZ |
3084 | } |
3085 | return errors < i ? 0 : -1; | |
3086 | } | |
3087 | ||
387125fc CM |
3088 | /* |
3089 | * endio for the write_dev_flush, this will wake anyone waiting | |
3090 | * for the barrier when it is done | |
3091 | */ | |
3092 | static void btrfs_end_empty_barrier(struct bio *bio, int err) | |
3093 | { | |
3094 | if (err) { | |
3095 | if (err == -EOPNOTSUPP) | |
3096 | set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); | |
3097 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
3098 | } | |
3099 | if (bio->bi_private) | |
3100 | complete(bio->bi_private); | |
3101 | bio_put(bio); | |
3102 | } | |
3103 | ||
3104 | /* | |
3105 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are | |
3106 | * sent down. With wait == 1, it waits for the previous flush. | |
3107 | * | |
3108 | * any device where the flush fails with eopnotsupp are flagged as not-barrier | |
3109 | * capable | |
3110 | */ | |
3111 | static int write_dev_flush(struct btrfs_device *device, int wait) | |
3112 | { | |
3113 | struct bio *bio; | |
3114 | int ret = 0; | |
3115 | ||
3116 | if (device->nobarriers) | |
3117 | return 0; | |
3118 | ||
3119 | if (wait) { | |
3120 | bio = device->flush_bio; | |
3121 | if (!bio) | |
3122 | return 0; | |
3123 | ||
3124 | wait_for_completion(&device->flush_wait); | |
3125 | ||
3126 | if (bio_flagged(bio, BIO_EOPNOTSUPP)) { | |
606686ee JB |
3127 | printk_in_rcu("btrfs: disabling barriers on dev %s\n", |
3128 | rcu_str_deref(device->name)); | |
387125fc | 3129 | device->nobarriers = 1; |
5af3e8cc | 3130 | } else if (!bio_flagged(bio, BIO_UPTODATE)) { |
387125fc | 3131 | ret = -EIO; |
5af3e8cc SB |
3132 | btrfs_dev_stat_inc_and_print(device, |
3133 | BTRFS_DEV_STAT_FLUSH_ERRS); | |
387125fc CM |
3134 | } |
3135 | ||
3136 | /* drop the reference from the wait == 0 run */ | |
3137 | bio_put(bio); | |
3138 | device->flush_bio = NULL; | |
3139 | ||
3140 | return ret; | |
3141 | } | |
3142 | ||
3143 | /* | |
3144 | * one reference for us, and we leave it for the | |
3145 | * caller | |
3146 | */ | |
9c017abc | 3147 | device->flush_bio = NULL; |
9be3395b | 3148 | bio = btrfs_io_bio_alloc(GFP_NOFS, 0); |
387125fc CM |
3149 | if (!bio) |
3150 | return -ENOMEM; | |
3151 | ||
3152 | bio->bi_end_io = btrfs_end_empty_barrier; | |
3153 | bio->bi_bdev = device->bdev; | |
3154 | init_completion(&device->flush_wait); | |
3155 | bio->bi_private = &device->flush_wait; | |
3156 | device->flush_bio = bio; | |
3157 | ||
3158 | bio_get(bio); | |
21adbd5c | 3159 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
387125fc CM |
3160 | |
3161 | return 0; | |
3162 | } | |
3163 | ||
3164 | /* | |
3165 | * send an empty flush down to each device in parallel, | |
3166 | * then wait for them | |
3167 | */ | |
3168 | static int barrier_all_devices(struct btrfs_fs_info *info) | |
3169 | { | |
3170 | struct list_head *head; | |
3171 | struct btrfs_device *dev; | |
5af3e8cc SB |
3172 | int errors_send = 0; |
3173 | int errors_wait = 0; | |
387125fc CM |
3174 | int ret; |
3175 | ||
3176 | /* send down all the barriers */ | |
3177 | head = &info->fs_devices->devices; | |
3178 | list_for_each_entry_rcu(dev, head, dev_list) { | |
3179 | if (!dev->bdev) { | |
5af3e8cc | 3180 | errors_send++; |
387125fc CM |
3181 | continue; |
3182 | } | |
3183 | if (!dev->in_fs_metadata || !dev->writeable) | |
3184 | continue; | |
3185 | ||
3186 | ret = write_dev_flush(dev, 0); | |
3187 | if (ret) | |
5af3e8cc | 3188 | errors_send++; |
387125fc CM |
3189 | } |
3190 | ||
3191 | /* wait for all the barriers */ | |
3192 | list_for_each_entry_rcu(dev, head, dev_list) { | |
3193 | if (!dev->bdev) { | |
5af3e8cc | 3194 | errors_wait++; |
387125fc CM |
3195 | continue; |
3196 | } | |
3197 | if (!dev->in_fs_metadata || !dev->writeable) | |
3198 | continue; | |
3199 | ||
3200 | ret = write_dev_flush(dev, 1); | |
3201 | if (ret) | |
5af3e8cc | 3202 | errors_wait++; |
387125fc | 3203 | } |
5af3e8cc SB |
3204 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
3205 | errors_wait > info->num_tolerated_disk_barrier_failures) | |
387125fc CM |
3206 | return -EIO; |
3207 | return 0; | |
3208 | } | |
3209 | ||
5af3e8cc SB |
3210 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
3211 | struct btrfs_fs_info *fs_info) | |
3212 | { | |
3213 | struct btrfs_ioctl_space_info space; | |
3214 | struct btrfs_space_info *sinfo; | |
3215 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, | |
3216 | BTRFS_BLOCK_GROUP_SYSTEM, | |
3217 | BTRFS_BLOCK_GROUP_METADATA, | |
3218 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; | |
3219 | int num_types = 4; | |
3220 | int i; | |
3221 | int c; | |
3222 | int num_tolerated_disk_barrier_failures = | |
3223 | (int)fs_info->fs_devices->num_devices; | |
3224 | ||
3225 | for (i = 0; i < num_types; i++) { | |
3226 | struct btrfs_space_info *tmp; | |
3227 | ||
3228 | sinfo = NULL; | |
3229 | rcu_read_lock(); | |
3230 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { | |
3231 | if (tmp->flags == types[i]) { | |
3232 | sinfo = tmp; | |
3233 | break; | |
3234 | } | |
3235 | } | |
3236 | rcu_read_unlock(); | |
3237 | ||
3238 | if (!sinfo) | |
3239 | continue; | |
3240 | ||
3241 | down_read(&sinfo->groups_sem); | |
3242 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { | |
3243 | if (!list_empty(&sinfo->block_groups[c])) { | |
3244 | u64 flags; | |
3245 | ||
3246 | btrfs_get_block_group_info( | |
3247 | &sinfo->block_groups[c], &space); | |
3248 | if (space.total_bytes == 0 || | |
3249 | space.used_bytes == 0) | |
3250 | continue; | |
3251 | flags = space.flags; | |
3252 | /* | |
3253 | * return | |
3254 | * 0: if dup, single or RAID0 is configured for | |
3255 | * any of metadata, system or data, else | |
3256 | * 1: if RAID5 is configured, or if RAID1 or | |
3257 | * RAID10 is configured and only two mirrors | |
3258 | * are used, else | |
3259 | * 2: if RAID6 is configured, else | |
3260 | * num_mirrors - 1: if RAID1 or RAID10 is | |
3261 | * configured and more than | |
3262 | * 2 mirrors are used. | |
3263 | */ | |
3264 | if (num_tolerated_disk_barrier_failures > 0 && | |
3265 | ((flags & (BTRFS_BLOCK_GROUP_DUP | | |
3266 | BTRFS_BLOCK_GROUP_RAID0)) || | |
3267 | ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) | |
3268 | == 0))) | |
3269 | num_tolerated_disk_barrier_failures = 0; | |
53b381b3 DW |
3270 | else if (num_tolerated_disk_barrier_failures > 1) { |
3271 | if (flags & (BTRFS_BLOCK_GROUP_RAID1 | | |
3272 | BTRFS_BLOCK_GROUP_RAID5 | | |
3273 | BTRFS_BLOCK_GROUP_RAID10)) { | |
3274 | num_tolerated_disk_barrier_failures = 1; | |
3275 | } else if (flags & | |
15b0a89d | 3276 | BTRFS_BLOCK_GROUP_RAID6) { |
53b381b3 DW |
3277 | num_tolerated_disk_barrier_failures = 2; |
3278 | } | |
3279 | } | |
5af3e8cc SB |
3280 | } |
3281 | } | |
3282 | up_read(&sinfo->groups_sem); | |
3283 | } | |
3284 | ||
3285 | return num_tolerated_disk_barrier_failures; | |
3286 | } | |
3287 | ||
48a3b636 | 3288 | static int write_all_supers(struct btrfs_root *root, int max_mirrors) |
f2984462 | 3289 | { |
e5e9a520 | 3290 | struct list_head *head; |
f2984462 | 3291 | struct btrfs_device *dev; |
a061fc8d | 3292 | struct btrfs_super_block *sb; |
f2984462 | 3293 | struct btrfs_dev_item *dev_item; |
f2984462 CM |
3294 | int ret; |
3295 | int do_barriers; | |
a236aed1 CM |
3296 | int max_errors; |
3297 | int total_errors = 0; | |
a061fc8d | 3298 | u64 flags; |
f2984462 | 3299 | |
6c41761f | 3300 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
f2984462 | 3301 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
af31f5e5 | 3302 | backup_super_roots(root->fs_info); |
f2984462 | 3303 | |
6c41761f | 3304 | sb = root->fs_info->super_for_commit; |
a061fc8d | 3305 | dev_item = &sb->dev_item; |
e5e9a520 | 3306 | |
174ba509 | 3307 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
e5e9a520 | 3308 | head = &root->fs_info->fs_devices->devices; |
387125fc | 3309 | |
5af3e8cc SB |
3310 | if (do_barriers) { |
3311 | ret = barrier_all_devices(root->fs_info); | |
3312 | if (ret) { | |
3313 | mutex_unlock( | |
3314 | &root->fs_info->fs_devices->device_list_mutex); | |
3315 | btrfs_error(root->fs_info, ret, | |
3316 | "errors while submitting device barriers."); | |
3317 | return ret; | |
3318 | } | |
3319 | } | |
387125fc | 3320 | |
1f78160c | 3321 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3322 | if (!dev->bdev) { |
3323 | total_errors++; | |
3324 | continue; | |
3325 | } | |
2b82032c | 3326 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3327 | continue; |
3328 | ||
2b82032c | 3329 | btrfs_set_stack_device_generation(dev_item, 0); |
a061fc8d CM |
3330 | btrfs_set_stack_device_type(dev_item, dev->type); |
3331 | btrfs_set_stack_device_id(dev_item, dev->devid); | |
3332 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); | |
3333 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); | |
3334 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); | |
3335 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); | |
3336 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); | |
3337 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); | |
2b82032c | 3338 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
a512bbf8 | 3339 | |
a061fc8d CM |
3340 | flags = btrfs_super_flags(sb); |
3341 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); | |
3342 | ||
a512bbf8 | 3343 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
a236aed1 CM |
3344 | if (ret) |
3345 | total_errors++; | |
f2984462 | 3346 | } |
a236aed1 | 3347 | if (total_errors > max_errors) { |
d397712b CM |
3348 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
3349 | total_errors); | |
79787eaa JM |
3350 | |
3351 | /* This shouldn't happen. FUA is masked off if unsupported */ | |
a236aed1 CM |
3352 | BUG(); |
3353 | } | |
f2984462 | 3354 | |
a512bbf8 | 3355 | total_errors = 0; |
1f78160c | 3356 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3357 | if (!dev->bdev) |
3358 | continue; | |
2b82032c | 3359 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3360 | continue; |
3361 | ||
a512bbf8 YZ |
3362 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
3363 | if (ret) | |
3364 | total_errors++; | |
f2984462 | 3365 | } |
174ba509 | 3366 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
a236aed1 | 3367 | if (total_errors > max_errors) { |
79787eaa JM |
3368 | btrfs_error(root->fs_info, -EIO, |
3369 | "%d errors while writing supers", total_errors); | |
3370 | return -EIO; | |
a236aed1 | 3371 | } |
f2984462 CM |
3372 | return 0; |
3373 | } | |
3374 | ||
a512bbf8 YZ |
3375 | int write_ctree_super(struct btrfs_trans_handle *trans, |
3376 | struct btrfs_root *root, int max_mirrors) | |
eb60ceac | 3377 | { |
e66f709b | 3378 | int ret; |
5f39d397 | 3379 | |
a512bbf8 | 3380 | ret = write_all_supers(root, max_mirrors); |
5f39d397 | 3381 | return ret; |
cfaa7295 CM |
3382 | } |
3383 | ||
143bede5 | 3384 | void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) |
2619ba1f | 3385 | { |
4df27c4d | 3386 | spin_lock(&fs_info->fs_roots_radix_lock); |
2619ba1f CM |
3387 | radix_tree_delete(&fs_info->fs_roots_radix, |
3388 | (unsigned long)root->root_key.objectid); | |
4df27c4d | 3389 | spin_unlock(&fs_info->fs_roots_radix_lock); |
76dda93c YZ |
3390 | |
3391 | if (btrfs_root_refs(&root->root_item) == 0) | |
3392 | synchronize_srcu(&fs_info->subvol_srcu); | |
3393 | ||
d7634482 | 3394 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { |
3321719e LB |
3395 | btrfs_free_log(NULL, root); |
3396 | btrfs_free_log_root_tree(NULL, fs_info); | |
3397 | } | |
3398 | ||
581bb050 LZ |
3399 | __btrfs_remove_free_space_cache(root->free_ino_pinned); |
3400 | __btrfs_remove_free_space_cache(root->free_ino_ctl); | |
4df27c4d | 3401 | free_fs_root(root); |
4df27c4d YZ |
3402 | } |
3403 | ||
3404 | static void free_fs_root(struct btrfs_root *root) | |
3405 | { | |
82d5902d | 3406 | iput(root->cache_inode); |
4df27c4d | 3407 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
0ee5dc67 AV |
3408 | if (root->anon_dev) |
3409 | free_anon_bdev(root->anon_dev); | |
4df27c4d YZ |
3410 | free_extent_buffer(root->node); |
3411 | free_extent_buffer(root->commit_root); | |
581bb050 LZ |
3412 | kfree(root->free_ino_ctl); |
3413 | kfree(root->free_ino_pinned); | |
d397712b | 3414 | kfree(root->name); |
2619ba1f | 3415 | kfree(root); |
2619ba1f CM |
3416 | } |
3417 | ||
c146afad | 3418 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
cfaa7295 | 3419 | { |
c146afad YZ |
3420 | u64 root_objectid = 0; |
3421 | struct btrfs_root *gang[8]; | |
3422 | int i; | |
3768f368 | 3423 | int ret; |
e089f05c | 3424 | |
c146afad YZ |
3425 | while (1) { |
3426 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
3427 | (void **)gang, root_objectid, | |
3428 | ARRAY_SIZE(gang)); | |
3429 | if (!ret) | |
3430 | break; | |
5d4f98a2 YZ |
3431 | |
3432 | root_objectid = gang[ret - 1]->root_key.objectid + 1; | |
c146afad | 3433 | for (i = 0; i < ret; i++) { |
66b4ffd1 JB |
3434 | int err; |
3435 | ||
c146afad | 3436 | root_objectid = gang[i]->root_key.objectid; |
66b4ffd1 JB |
3437 | err = btrfs_orphan_cleanup(gang[i]); |
3438 | if (err) | |
3439 | return err; | |
c146afad YZ |
3440 | } |
3441 | root_objectid++; | |
3442 | } | |
3443 | return 0; | |
3444 | } | |
a2135011 | 3445 | |
c146afad YZ |
3446 | int btrfs_commit_super(struct btrfs_root *root) |
3447 | { | |
3448 | struct btrfs_trans_handle *trans; | |
3449 | int ret; | |
a74a4b97 | 3450 | |
c146afad | 3451 | mutex_lock(&root->fs_info->cleaner_mutex); |
24bbcf04 | 3452 | btrfs_run_delayed_iputs(root); |
c146afad | 3453 | mutex_unlock(&root->fs_info->cleaner_mutex); |
9d1a2a3a | 3454 | wake_up_process(root->fs_info->cleaner_kthread); |
c71bf099 YZ |
3455 | |
3456 | /* wait until ongoing cleanup work done */ | |
3457 | down_write(&root->fs_info->cleanup_work_sem); | |
3458 | up_write(&root->fs_info->cleanup_work_sem); | |
3459 | ||
7a7eaa40 | 3460 | trans = btrfs_join_transaction(root); |
3612b495 TI |
3461 | if (IS_ERR(trans)) |
3462 | return PTR_ERR(trans); | |
54aa1f4d | 3463 | ret = btrfs_commit_transaction(trans, root); |
79787eaa JM |
3464 | if (ret) |
3465 | return ret; | |
c146afad | 3466 | /* run commit again to drop the original snapshot */ |
7a7eaa40 | 3467 | trans = btrfs_join_transaction(root); |
3612b495 TI |
3468 | if (IS_ERR(trans)) |
3469 | return PTR_ERR(trans); | |
79787eaa JM |
3470 | ret = btrfs_commit_transaction(trans, root); |
3471 | if (ret) | |
3472 | return ret; | |
79154b1b | 3473 | ret = btrfs_write_and_wait_transaction(NULL, root); |
79787eaa JM |
3474 | if (ret) { |
3475 | btrfs_error(root->fs_info, ret, | |
3476 | "Failed to sync btree inode to disk."); | |
3477 | return ret; | |
3478 | } | |
d6bfde87 | 3479 | |
a512bbf8 | 3480 | ret = write_ctree_super(NULL, root, 0); |
c146afad YZ |
3481 | return ret; |
3482 | } | |
3483 | ||
3484 | int close_ctree(struct btrfs_root *root) | |
3485 | { | |
3486 | struct btrfs_fs_info *fs_info = root->fs_info; | |
3487 | int ret; | |
3488 | ||
3489 | fs_info->closing = 1; | |
3490 | smp_mb(); | |
3491 | ||
837d5b6e | 3492 | /* pause restriper - we want to resume on mount */ |
aa1b8cd4 | 3493 | btrfs_pause_balance(fs_info); |
837d5b6e | 3494 | |
8dabb742 SB |
3495 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
3496 | ||
aa1b8cd4 | 3497 | btrfs_scrub_cancel(fs_info); |
4cb5300b CM |
3498 | |
3499 | /* wait for any defraggers to finish */ | |
3500 | wait_event(fs_info->transaction_wait, | |
3501 | (atomic_read(&fs_info->defrag_running) == 0)); | |
3502 | ||
3503 | /* clear out the rbtree of defraggable inodes */ | |
26176e7c | 3504 | btrfs_cleanup_defrag_inodes(fs_info); |
4cb5300b | 3505 | |
c146afad | 3506 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
acce952b | 3507 | ret = btrfs_commit_super(root); |
3508 | if (ret) | |
3509 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); | |
3510 | } | |
3511 | ||
87533c47 | 3512 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
68ce9682 | 3513 | btrfs_error_commit_super(root); |
0f7d52f4 | 3514 | |
300e4f8a JB |
3515 | btrfs_put_block_group_cache(fs_info); |
3516 | ||
e3029d9f AV |
3517 | kthread_stop(fs_info->transaction_kthread); |
3518 | kthread_stop(fs_info->cleaner_kthread); | |
8929ecfa | 3519 | |
f25784b3 YZ |
3520 | fs_info->closing = 2; |
3521 | smp_mb(); | |
3522 | ||
bcef60f2 AJ |
3523 | btrfs_free_qgroup_config(root->fs_info); |
3524 | ||
963d678b MX |
3525 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
3526 | printk(KERN_INFO "btrfs: at unmount delalloc count %lld\n", | |
3527 | percpu_counter_sum(&fs_info->delalloc_bytes)); | |
b0c68f8b | 3528 | } |
bcc63abb | 3529 | |
e3029d9f | 3530 | btrfs_free_block_groups(fs_info); |
d10c5f31 | 3531 | |
13e6c37b | 3532 | btrfs_stop_all_workers(fs_info); |
2932505a | 3533 | |
c146afad | 3534 | del_fs_roots(fs_info); |
d10c5f31 | 3535 | |
13e6c37b | 3536 | free_root_pointers(fs_info, 1); |
9ad6b7bc | 3537 | |
13e6c37b | 3538 | iput(fs_info->btree_inode); |
d6bfde87 | 3539 | |
21adbd5c SB |
3540 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
3541 | if (btrfs_test_opt(root, CHECK_INTEGRITY)) | |
3542 | btrfsic_unmount(root, fs_info->fs_devices); | |
3543 | #endif | |
3544 | ||
dfe25020 | 3545 | btrfs_close_devices(fs_info->fs_devices); |
0b86a832 | 3546 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
b248a415 | 3547 | |
e2d84521 | 3548 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
963d678b | 3549 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
04160088 | 3550 | bdi_destroy(&fs_info->bdi); |
76dda93c | 3551 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
0b86a832 | 3552 | |
53b381b3 DW |
3553 | btrfs_free_stripe_hash_table(fs_info); |
3554 | ||
eb60ceac CM |
3555 | return 0; |
3556 | } | |
3557 | ||
b9fab919 CM |
3558 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
3559 | int atomic) | |
5f39d397 | 3560 | { |
1259ab75 | 3561 | int ret; |
727011e0 | 3562 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
1259ab75 | 3563 | |
0b32f4bb | 3564 | ret = extent_buffer_uptodate(buf); |
1259ab75 CM |
3565 | if (!ret) |
3566 | return ret; | |
3567 | ||
3568 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, | |
b9fab919 CM |
3569 | parent_transid, atomic); |
3570 | if (ret == -EAGAIN) | |
3571 | return ret; | |
1259ab75 | 3572 | return !ret; |
5f39d397 CM |
3573 | } |
3574 | ||
3575 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) | |
ccd467d6 | 3576 | { |
0b32f4bb | 3577 | return set_extent_buffer_uptodate(buf); |
5f39d397 | 3578 | } |
6702ed49 | 3579 | |
5f39d397 CM |
3580 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
3581 | { | |
727011e0 | 3582 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
5f39d397 | 3583 | u64 transid = btrfs_header_generation(buf); |
b9473439 | 3584 | int was_dirty; |
b4ce94de | 3585 | |
b9447ef8 | 3586 | btrfs_assert_tree_locked(buf); |
31b1a2bd JL |
3587 | if (transid != root->fs_info->generation) |
3588 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " | |
d397712b | 3589 | "found %llu running %llu\n", |
db94535d | 3590 | (unsigned long long)buf->start, |
d397712b CM |
3591 | (unsigned long long)transid, |
3592 | (unsigned long long)root->fs_info->generation); | |
0b32f4bb | 3593 | was_dirty = set_extent_buffer_dirty(buf); |
e2d84521 MX |
3594 | if (!was_dirty) |
3595 | __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, | |
3596 | buf->len, | |
3597 | root->fs_info->dirty_metadata_batch); | |
eb60ceac CM |
3598 | } |
3599 | ||
b53d3f5d LB |
3600 | static void __btrfs_btree_balance_dirty(struct btrfs_root *root, |
3601 | int flush_delayed) | |
16cdcec7 MX |
3602 | { |
3603 | /* | |
3604 | * looks as though older kernels can get into trouble with | |
3605 | * this code, they end up stuck in balance_dirty_pages forever | |
3606 | */ | |
e2d84521 | 3607 | int ret; |
16cdcec7 MX |
3608 | |
3609 | if (current->flags & PF_MEMALLOC) | |
3610 | return; | |
3611 | ||
b53d3f5d LB |
3612 | if (flush_delayed) |
3613 | btrfs_balance_delayed_items(root); | |
16cdcec7 | 3614 | |
e2d84521 MX |
3615 | ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, |
3616 | BTRFS_DIRTY_METADATA_THRESH); | |
3617 | if (ret > 0) { | |
d0e1d66b NJ |
3618 | balance_dirty_pages_ratelimited( |
3619 | root->fs_info->btree_inode->i_mapping); | |
16cdcec7 MX |
3620 | } |
3621 | return; | |
3622 | } | |
3623 | ||
b53d3f5d | 3624 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
35b7e476 | 3625 | { |
b53d3f5d LB |
3626 | __btrfs_btree_balance_dirty(root, 1); |
3627 | } | |
585ad2c3 | 3628 | |
b53d3f5d LB |
3629 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) |
3630 | { | |
3631 | __btrfs_btree_balance_dirty(root, 0); | |
35b7e476 | 3632 | } |
6b80053d | 3633 | |
ca7a79ad | 3634 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
6b80053d | 3635 | { |
727011e0 | 3636 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
0b32f4bb | 3637 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
6b80053d | 3638 | } |
0da5468f | 3639 | |
fcd1f065 | 3640 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 3641 | int read_only) |
3642 | { | |
1104a885 DS |
3643 | /* |
3644 | * Placeholder for checks | |
3645 | */ | |
fcd1f065 | 3646 | return 0; |
acce952b | 3647 | } |
3648 | ||
48a3b636 | 3649 | static void btrfs_error_commit_super(struct btrfs_root *root) |
acce952b | 3650 | { |
acce952b | 3651 | mutex_lock(&root->fs_info->cleaner_mutex); |
3652 | btrfs_run_delayed_iputs(root); | |
3653 | mutex_unlock(&root->fs_info->cleaner_mutex); | |
3654 | ||
3655 | down_write(&root->fs_info->cleanup_work_sem); | |
3656 | up_write(&root->fs_info->cleanup_work_sem); | |
3657 | ||
3658 | /* cleanup FS via transaction */ | |
3659 | btrfs_cleanup_transaction(root); | |
acce952b | 3660 | } |
3661 | ||
569e0f35 JB |
3662 | static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t, |
3663 | struct btrfs_root *root) | |
acce952b | 3664 | { |
3665 | struct btrfs_inode *btrfs_inode; | |
3666 | struct list_head splice; | |
3667 | ||
3668 | INIT_LIST_HEAD(&splice); | |
3669 | ||
3670 | mutex_lock(&root->fs_info->ordered_operations_mutex); | |
3671 | spin_lock(&root->fs_info->ordered_extent_lock); | |
3672 | ||
569e0f35 | 3673 | list_splice_init(&t->ordered_operations, &splice); |
acce952b | 3674 | while (!list_empty(&splice)) { |
3675 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, | |
3676 | ordered_operations); | |
3677 | ||
3678 | list_del_init(&btrfs_inode->ordered_operations); | |
b216cbfb | 3679 | spin_unlock(&root->fs_info->ordered_extent_lock); |
acce952b | 3680 | |
3681 | btrfs_invalidate_inodes(btrfs_inode->root); | |
b216cbfb MX |
3682 | |
3683 | spin_lock(&root->fs_info->ordered_extent_lock); | |
acce952b | 3684 | } |
3685 | ||
3686 | spin_unlock(&root->fs_info->ordered_extent_lock); | |
3687 | mutex_unlock(&root->fs_info->ordered_operations_mutex); | |
acce952b | 3688 | } |
3689 | ||
143bede5 | 3690 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
acce952b | 3691 | { |
acce952b | 3692 | struct btrfs_ordered_extent *ordered; |
acce952b | 3693 | |
3694 | spin_lock(&root->fs_info->ordered_extent_lock); | |
779880ef JB |
3695 | /* |
3696 | * This will just short circuit the ordered completion stuff which will | |
3697 | * make sure the ordered extent gets properly cleaned up. | |
3698 | */ | |
3699 | list_for_each_entry(ordered, &root->fs_info->ordered_extents, | |
3700 | root_extent_list) | |
3701 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); | |
acce952b | 3702 | spin_unlock(&root->fs_info->ordered_extent_lock); |
acce952b | 3703 | } |
3704 | ||
79787eaa JM |
3705 | int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
3706 | struct btrfs_root *root) | |
acce952b | 3707 | { |
3708 | struct rb_node *node; | |
3709 | struct btrfs_delayed_ref_root *delayed_refs; | |
3710 | struct btrfs_delayed_ref_node *ref; | |
3711 | int ret = 0; | |
3712 | ||
3713 | delayed_refs = &trans->delayed_refs; | |
3714 | ||
3715 | spin_lock(&delayed_refs->lock); | |
3716 | if (delayed_refs->num_entries == 0) { | |
cfece4db | 3717 | spin_unlock(&delayed_refs->lock); |
acce952b | 3718 | printk(KERN_INFO "delayed_refs has NO entry\n"); |
3719 | return ret; | |
3720 | } | |
3721 | ||
b939d1ab | 3722 | while ((node = rb_first(&delayed_refs->root)) != NULL) { |
eb12db69 | 3723 | struct btrfs_delayed_ref_head *head = NULL; |
acce952b | 3724 | |
eb12db69 | 3725 | ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); |
acce952b | 3726 | atomic_set(&ref->refs, 1); |
3727 | if (btrfs_delayed_ref_is_head(ref)) { | |
acce952b | 3728 | |
3729 | head = btrfs_delayed_node_to_head(ref); | |
b939d1ab JB |
3730 | if (!mutex_trylock(&head->mutex)) { |
3731 | atomic_inc(&ref->refs); | |
3732 | spin_unlock(&delayed_refs->lock); | |
3733 | ||
3734 | /* Need to wait for the delayed ref to run */ | |
3735 | mutex_lock(&head->mutex); | |
3736 | mutex_unlock(&head->mutex); | |
3737 | btrfs_put_delayed_ref(ref); | |
3738 | ||
e18fca73 | 3739 | spin_lock(&delayed_refs->lock); |
b939d1ab JB |
3740 | continue; |
3741 | } | |
3742 | ||
54067ae9 JB |
3743 | if (head->must_insert_reserved) |
3744 | btrfs_pin_extent(root, ref->bytenr, | |
3745 | ref->num_bytes, 1); | |
78a6184a | 3746 | btrfs_free_delayed_extent_op(head->extent_op); |
acce952b | 3747 | delayed_refs->num_heads--; |
3748 | if (list_empty(&head->cluster)) | |
3749 | delayed_refs->num_heads_ready--; | |
3750 | list_del_init(&head->cluster); | |
acce952b | 3751 | } |
eb12db69 | 3752 | |
b939d1ab JB |
3753 | ref->in_tree = 0; |
3754 | rb_erase(&ref->rb_node, &delayed_refs->root); | |
3755 | delayed_refs->num_entries--; | |
eb12db69 JB |
3756 | if (head) |
3757 | mutex_unlock(&head->mutex); | |
acce952b | 3758 | spin_unlock(&delayed_refs->lock); |
3759 | btrfs_put_delayed_ref(ref); | |
3760 | ||
3761 | cond_resched(); | |
3762 | spin_lock(&delayed_refs->lock); | |
3763 | } | |
3764 | ||
3765 | spin_unlock(&delayed_refs->lock); | |
3766 | ||
3767 | return ret; | |
3768 | } | |
3769 | ||
aec8030a | 3770 | static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t) |
acce952b | 3771 | { |
3772 | struct btrfs_pending_snapshot *snapshot; | |
3773 | struct list_head splice; | |
3774 | ||
3775 | INIT_LIST_HEAD(&splice); | |
3776 | ||
3777 | list_splice_init(&t->pending_snapshots, &splice); | |
3778 | ||
3779 | while (!list_empty(&splice)) { | |
3780 | snapshot = list_entry(splice.next, | |
3781 | struct btrfs_pending_snapshot, | |
3782 | list); | |
aec8030a | 3783 | snapshot->error = -ECANCELED; |
acce952b | 3784 | list_del_init(&snapshot->list); |
acce952b | 3785 | } |
acce952b | 3786 | } |
3787 | ||
143bede5 | 3788 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
acce952b | 3789 | { |
3790 | struct btrfs_inode *btrfs_inode; | |
3791 | struct list_head splice; | |
3792 | ||
3793 | INIT_LIST_HEAD(&splice); | |
3794 | ||
acce952b | 3795 | spin_lock(&root->fs_info->delalloc_lock); |
5be76758 | 3796 | list_splice_init(&root->fs_info->delalloc_inodes, &splice); |
acce952b | 3797 | |
3798 | while (!list_empty(&splice)) { | |
3799 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, | |
3800 | delalloc_inodes); | |
3801 | ||
3802 | list_del_init(&btrfs_inode->delalloc_inodes); | |
df0af1a5 MX |
3803 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
3804 | &btrfs_inode->runtime_flags); | |
b216cbfb | 3805 | spin_unlock(&root->fs_info->delalloc_lock); |
acce952b | 3806 | |
3807 | btrfs_invalidate_inodes(btrfs_inode->root); | |
b216cbfb MX |
3808 | |
3809 | spin_lock(&root->fs_info->delalloc_lock); | |
acce952b | 3810 | } |
3811 | ||
3812 | spin_unlock(&root->fs_info->delalloc_lock); | |
acce952b | 3813 | } |
3814 | ||
3815 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, | |
3816 | struct extent_io_tree *dirty_pages, | |
3817 | int mark) | |
3818 | { | |
3819 | int ret; | |
acce952b | 3820 | struct extent_buffer *eb; |
3821 | u64 start = 0; | |
3822 | u64 end; | |
acce952b | 3823 | |
3824 | while (1) { | |
3825 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, | |
e6138876 | 3826 | mark, NULL); |
acce952b | 3827 | if (ret) |
3828 | break; | |
3829 | ||
3830 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); | |
3831 | while (start <= end) { | |
fd8b2b61 JB |
3832 | eb = btrfs_find_tree_block(root, start, |
3833 | root->leafsize); | |
69a85bd8 | 3834 | start += root->leafsize; |
fd8b2b61 | 3835 | if (!eb) |
acce952b | 3836 | continue; |
fd8b2b61 | 3837 | wait_on_extent_buffer_writeback(eb); |
acce952b | 3838 | |
fd8b2b61 JB |
3839 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
3840 | &eb->bflags)) | |
3841 | clear_extent_buffer_dirty(eb); | |
3842 | free_extent_buffer_stale(eb); | |
acce952b | 3843 | } |
3844 | } | |
3845 | ||
3846 | return ret; | |
3847 | } | |
3848 | ||
3849 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, | |
3850 | struct extent_io_tree *pinned_extents) | |
3851 | { | |
3852 | struct extent_io_tree *unpin; | |
3853 | u64 start; | |
3854 | u64 end; | |
3855 | int ret; | |
ed0eaa14 | 3856 | bool loop = true; |
acce952b | 3857 | |
3858 | unpin = pinned_extents; | |
ed0eaa14 | 3859 | again: |
acce952b | 3860 | while (1) { |
3861 | ret = find_first_extent_bit(unpin, 0, &start, &end, | |
e6138876 | 3862 | EXTENT_DIRTY, NULL); |
acce952b | 3863 | if (ret) |
3864 | break; | |
3865 | ||
3866 | /* opt_discard */ | |
5378e607 LD |
3867 | if (btrfs_test_opt(root, DISCARD)) |
3868 | ret = btrfs_error_discard_extent(root, start, | |
3869 | end + 1 - start, | |
3870 | NULL); | |
acce952b | 3871 | |
3872 | clear_extent_dirty(unpin, start, end, GFP_NOFS); | |
3873 | btrfs_error_unpin_extent_range(root, start, end); | |
3874 | cond_resched(); | |
3875 | } | |
3876 | ||
ed0eaa14 LB |
3877 | if (loop) { |
3878 | if (unpin == &root->fs_info->freed_extents[0]) | |
3879 | unpin = &root->fs_info->freed_extents[1]; | |
3880 | else | |
3881 | unpin = &root->fs_info->freed_extents[0]; | |
3882 | loop = false; | |
3883 | goto again; | |
3884 | } | |
3885 | ||
acce952b | 3886 | return 0; |
3887 | } | |
3888 | ||
49b25e05 JM |
3889 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
3890 | struct btrfs_root *root) | |
3891 | { | |
3892 | btrfs_destroy_delayed_refs(cur_trans, root); | |
3893 | btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv, | |
3894 | cur_trans->dirty_pages.dirty_bytes); | |
3895 | ||
3896 | /* FIXME: cleanup wait for commit */ | |
3897 | cur_trans->in_commit = 1; | |
3898 | cur_trans->blocked = 1; | |
d7096fc3 | 3899 | wake_up(&root->fs_info->transaction_blocked_wait); |
49b25e05 | 3900 | |
aec8030a MX |
3901 | btrfs_evict_pending_snapshots(cur_trans); |
3902 | ||
49b25e05 | 3903 | cur_trans->blocked = 0; |
d7096fc3 | 3904 | wake_up(&root->fs_info->transaction_wait); |
49b25e05 JM |
3905 | |
3906 | cur_trans->commit_done = 1; | |
d7096fc3 | 3907 | wake_up(&cur_trans->commit_wait); |
49b25e05 | 3908 | |
67cde344 MX |
3909 | btrfs_destroy_delayed_inodes(root); |
3910 | btrfs_assert_delayed_root_empty(root); | |
49b25e05 | 3911 | |
49b25e05 JM |
3912 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
3913 | EXTENT_DIRTY); | |
6e841e32 LB |
3914 | btrfs_destroy_pinned_extent(root, |
3915 | root->fs_info->pinned_extents); | |
49b25e05 JM |
3916 | |
3917 | /* | |
3918 | memset(cur_trans, 0, sizeof(*cur_trans)); | |
3919 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); | |
3920 | */ | |
3921 | } | |
3922 | ||
48a3b636 | 3923 | static int btrfs_cleanup_transaction(struct btrfs_root *root) |
acce952b | 3924 | { |
3925 | struct btrfs_transaction *t; | |
3926 | LIST_HEAD(list); | |
3927 | ||
acce952b | 3928 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
3929 | ||
a4abeea4 | 3930 | spin_lock(&root->fs_info->trans_lock); |
acce952b | 3931 | list_splice_init(&root->fs_info->trans_list, &list); |
a4abeea4 JB |
3932 | root->fs_info->trans_no_join = 1; |
3933 | spin_unlock(&root->fs_info->trans_lock); | |
3934 | ||
acce952b | 3935 | while (!list_empty(&list)) { |
3936 | t = list_entry(list.next, struct btrfs_transaction, list); | |
acce952b | 3937 | |
569e0f35 | 3938 | btrfs_destroy_ordered_operations(t, root); |
acce952b | 3939 | |
3940 | btrfs_destroy_ordered_extents(root); | |
3941 | ||
3942 | btrfs_destroy_delayed_refs(t, root); | |
3943 | ||
acce952b | 3944 | /* FIXME: cleanup wait for commit */ |
3945 | t->in_commit = 1; | |
3946 | t->blocked = 1; | |
66657b31 | 3947 | smp_mb(); |
acce952b | 3948 | if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) |
3949 | wake_up(&root->fs_info->transaction_blocked_wait); | |
3950 | ||
aec8030a MX |
3951 | btrfs_evict_pending_snapshots(t); |
3952 | ||
acce952b | 3953 | t->blocked = 0; |
66657b31 | 3954 | smp_mb(); |
acce952b | 3955 | if (waitqueue_active(&root->fs_info->transaction_wait)) |
3956 | wake_up(&root->fs_info->transaction_wait); | |
acce952b | 3957 | |
acce952b | 3958 | t->commit_done = 1; |
66657b31 | 3959 | smp_mb(); |
acce952b | 3960 | if (waitqueue_active(&t->commit_wait)) |
3961 | wake_up(&t->commit_wait); | |
acce952b | 3962 | |
67cde344 MX |
3963 | btrfs_destroy_delayed_inodes(root); |
3964 | btrfs_assert_delayed_root_empty(root); | |
3965 | ||
acce952b | 3966 | btrfs_destroy_delalloc_inodes(root); |
3967 | ||
a4abeea4 | 3968 | spin_lock(&root->fs_info->trans_lock); |
acce952b | 3969 | root->fs_info->running_transaction = NULL; |
a4abeea4 | 3970 | spin_unlock(&root->fs_info->trans_lock); |
acce952b | 3971 | |
3972 | btrfs_destroy_marked_extents(root, &t->dirty_pages, | |
3973 | EXTENT_DIRTY); | |
3974 | ||
3975 | btrfs_destroy_pinned_extent(root, | |
3976 | root->fs_info->pinned_extents); | |
3977 | ||
13c5a93e | 3978 | atomic_set(&t->use_count, 0); |
acce952b | 3979 | list_del_init(&t->list); |
3980 | memset(t, 0, sizeof(*t)); | |
3981 | kmem_cache_free(btrfs_transaction_cachep, t); | |
3982 | } | |
3983 | ||
a4abeea4 JB |
3984 | spin_lock(&root->fs_info->trans_lock); |
3985 | root->fs_info->trans_no_join = 0; | |
3986 | spin_unlock(&root->fs_info->trans_lock); | |
acce952b | 3987 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
acce952b | 3988 | |
3989 | return 0; | |
3990 | } | |
3991 | ||
d1310b2e | 3992 | static struct extent_io_ops btree_extent_io_ops = { |
ce9adaa5 | 3993 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
4bb31e92 | 3994 | .readpage_io_failed_hook = btree_io_failed_hook, |
0b86a832 | 3995 | .submit_bio_hook = btree_submit_bio_hook, |
239b14b3 CM |
3996 | /* note we're sharing with inode.c for the merge bio hook */ |
3997 | .merge_bio_hook = btrfs_merge_bio_hook, | |
0da5468f | 3998 | }; |