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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> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
784b4e29 | 30 | #include <linux/migrate.h> |
7a36ddec | 31 | #include <linux/ratelimit.h> |
6463fe58 | 32 | #include <linux/uuid.h> |
803b2f54 | 33 | #include <linux/semaphore.h> |
7e75bf3f | 34 | #include <asm/unaligned.h> |
eb60ceac CM |
35 | #include "ctree.h" |
36 | #include "disk-io.h" | |
0b947aff | 37 | #include "hash.h" |
e089f05c | 38 | #include "transaction.h" |
0f7d52f4 | 39 | #include "btrfs_inode.h" |
0b86a832 | 40 | #include "volumes.h" |
db94535d | 41 | #include "print-tree.h" |
925baedd | 42 | #include "locking.h" |
e02119d5 | 43 | #include "tree-log.h" |
fa9c0d79 | 44 | #include "free-space-cache.h" |
581bb050 | 45 | #include "inode-map.h" |
21adbd5c | 46 | #include "check-integrity.h" |
606686ee | 47 | #include "rcu-string.h" |
8dabb742 | 48 | #include "dev-replace.h" |
53b381b3 | 49 | #include "raid56.h" |
5ac1d209 | 50 | #include "sysfs.h" |
fcebe456 | 51 | #include "qgroup.h" |
eb60ceac | 52 | |
de0022b9 JB |
53 | #ifdef CONFIG_X86 |
54 | #include <asm/cpufeature.h> | |
55 | #endif | |
56 | ||
d1310b2e | 57 | static struct extent_io_ops btree_extent_io_ops; |
8b712842 | 58 | static void end_workqueue_fn(struct btrfs_work *work); |
4df27c4d | 59 | static void free_fs_root(struct btrfs_root *root); |
fcd1f065 | 60 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 61 | int read_only); |
143bede5 | 62 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root); |
acce952b | 63 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
64 | struct btrfs_root *root); | |
143bede5 | 65 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
acce952b | 66 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
67 | struct extent_io_tree *dirty_pages, | |
68 | int mark); | |
69 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, | |
70 | struct extent_io_tree *pinned_extents); | |
48a3b636 ES |
71 | static int btrfs_cleanup_transaction(struct btrfs_root *root); |
72 | static void btrfs_error_commit_super(struct btrfs_root *root); | |
ce9adaa5 | 73 | |
d352ac68 CM |
74 | /* |
75 | * end_io_wq structs are used to do processing in task context when an IO is | |
76 | * complete. This is used during reads to verify checksums, and it is used | |
77 | * by writes to insert metadata for new file extents after IO is complete. | |
78 | */ | |
ce9adaa5 CM |
79 | struct end_io_wq { |
80 | struct bio *bio; | |
81 | bio_end_io_t *end_io; | |
82 | void *private; | |
83 | struct btrfs_fs_info *info; | |
84 | int error; | |
22c59948 | 85 | int metadata; |
ce9adaa5 | 86 | struct list_head list; |
8b712842 | 87 | struct btrfs_work work; |
ce9adaa5 | 88 | }; |
0da5468f | 89 | |
d352ac68 CM |
90 | /* |
91 | * async submit bios are used to offload expensive checksumming | |
92 | * onto the worker threads. They checksum file and metadata bios | |
93 | * just before they are sent down the IO stack. | |
94 | */ | |
44b8bd7e CM |
95 | struct async_submit_bio { |
96 | struct inode *inode; | |
97 | struct bio *bio; | |
98 | struct list_head list; | |
4a69a410 CM |
99 | extent_submit_bio_hook_t *submit_bio_start; |
100 | extent_submit_bio_hook_t *submit_bio_done; | |
44b8bd7e CM |
101 | int rw; |
102 | int mirror_num; | |
c8b97818 | 103 | unsigned long bio_flags; |
eaf25d93 CM |
104 | /* |
105 | * bio_offset is optional, can be used if the pages in the bio | |
106 | * can't tell us where in the file the bio should go | |
107 | */ | |
108 | u64 bio_offset; | |
8b712842 | 109 | struct btrfs_work work; |
79787eaa | 110 | int error; |
44b8bd7e CM |
111 | }; |
112 | ||
85d4e461 CM |
113 | /* |
114 | * Lockdep class keys for extent_buffer->lock's in this root. For a given | |
115 | * eb, the lockdep key is determined by the btrfs_root it belongs to and | |
116 | * the level the eb occupies in the tree. | |
117 | * | |
118 | * Different roots are used for different purposes and may nest inside each | |
119 | * other and they require separate keysets. As lockdep keys should be | |
120 | * static, assign keysets according to the purpose of the root as indicated | |
121 | * by btrfs_root->objectid. This ensures that all special purpose roots | |
122 | * have separate keysets. | |
4008c04a | 123 | * |
85d4e461 CM |
124 | * Lock-nesting across peer nodes is always done with the immediate parent |
125 | * node locked thus preventing deadlock. As lockdep doesn't know this, use | |
126 | * subclass to avoid triggering lockdep warning in such cases. | |
4008c04a | 127 | * |
85d4e461 CM |
128 | * The key is set by the readpage_end_io_hook after the buffer has passed |
129 | * csum validation but before the pages are unlocked. It is also set by | |
130 | * btrfs_init_new_buffer on freshly allocated blocks. | |
4008c04a | 131 | * |
85d4e461 CM |
132 | * We also add a check to make sure the highest level of the tree is the |
133 | * same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this code | |
134 | * needs update as well. | |
4008c04a CM |
135 | */ |
136 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
137 | # if BTRFS_MAX_LEVEL != 8 | |
138 | # error | |
139 | # endif | |
85d4e461 CM |
140 | |
141 | static struct btrfs_lockdep_keyset { | |
142 | u64 id; /* root objectid */ | |
143 | const char *name_stem; /* lock name stem */ | |
144 | char names[BTRFS_MAX_LEVEL + 1][20]; | |
145 | struct lock_class_key keys[BTRFS_MAX_LEVEL + 1]; | |
146 | } btrfs_lockdep_keysets[] = { | |
147 | { .id = BTRFS_ROOT_TREE_OBJECTID, .name_stem = "root" }, | |
148 | { .id = BTRFS_EXTENT_TREE_OBJECTID, .name_stem = "extent" }, | |
149 | { .id = BTRFS_CHUNK_TREE_OBJECTID, .name_stem = "chunk" }, | |
150 | { .id = BTRFS_DEV_TREE_OBJECTID, .name_stem = "dev" }, | |
151 | { .id = BTRFS_FS_TREE_OBJECTID, .name_stem = "fs" }, | |
152 | { .id = BTRFS_CSUM_TREE_OBJECTID, .name_stem = "csum" }, | |
60b62978 | 153 | { .id = BTRFS_QUOTA_TREE_OBJECTID, .name_stem = "quota" }, |
85d4e461 CM |
154 | { .id = BTRFS_TREE_LOG_OBJECTID, .name_stem = "log" }, |
155 | { .id = BTRFS_TREE_RELOC_OBJECTID, .name_stem = "treloc" }, | |
156 | { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, .name_stem = "dreloc" }, | |
13fd8da9 | 157 | { .id = BTRFS_UUID_TREE_OBJECTID, .name_stem = "uuid" }, |
85d4e461 | 158 | { .id = 0, .name_stem = "tree" }, |
4008c04a | 159 | }; |
85d4e461 CM |
160 | |
161 | void __init btrfs_init_lockdep(void) | |
162 | { | |
163 | int i, j; | |
164 | ||
165 | /* initialize lockdep class names */ | |
166 | for (i = 0; i < ARRAY_SIZE(btrfs_lockdep_keysets); i++) { | |
167 | struct btrfs_lockdep_keyset *ks = &btrfs_lockdep_keysets[i]; | |
168 | ||
169 | for (j = 0; j < ARRAY_SIZE(ks->names); j++) | |
170 | snprintf(ks->names[j], sizeof(ks->names[j]), | |
171 | "btrfs-%s-%02d", ks->name_stem, j); | |
172 | } | |
173 | } | |
174 | ||
175 | void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, | |
176 | int level) | |
177 | { | |
178 | struct btrfs_lockdep_keyset *ks; | |
179 | ||
180 | BUG_ON(level >= ARRAY_SIZE(ks->keys)); | |
181 | ||
182 | /* find the matching keyset, id 0 is the default entry */ | |
183 | for (ks = btrfs_lockdep_keysets; ks->id; ks++) | |
184 | if (ks->id == objectid) | |
185 | break; | |
186 | ||
187 | lockdep_set_class_and_name(&eb->lock, | |
188 | &ks->keys[level], ks->names[level]); | |
189 | } | |
190 | ||
4008c04a CM |
191 | #endif |
192 | ||
d352ac68 CM |
193 | /* |
194 | * extents on the btree inode are pretty simple, there's one extent | |
195 | * that covers the entire device | |
196 | */ | |
b2950863 | 197 | static struct extent_map *btree_get_extent(struct inode *inode, |
306e16ce | 198 | struct page *page, size_t pg_offset, u64 start, u64 len, |
b2950863 | 199 | int create) |
7eccb903 | 200 | { |
5f39d397 CM |
201 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
202 | struct extent_map *em; | |
203 | int ret; | |
204 | ||
890871be | 205 | read_lock(&em_tree->lock); |
d1310b2e | 206 | em = lookup_extent_mapping(em_tree, start, len); |
a061fc8d CM |
207 | if (em) { |
208 | em->bdev = | |
209 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; | |
890871be | 210 | read_unlock(&em_tree->lock); |
5f39d397 | 211 | goto out; |
a061fc8d | 212 | } |
890871be | 213 | read_unlock(&em_tree->lock); |
7b13b7b1 | 214 | |
172ddd60 | 215 | em = alloc_extent_map(); |
5f39d397 CM |
216 | if (!em) { |
217 | em = ERR_PTR(-ENOMEM); | |
218 | goto out; | |
219 | } | |
220 | em->start = 0; | |
0afbaf8c | 221 | em->len = (u64)-1; |
c8b97818 | 222 | em->block_len = (u64)-1; |
5f39d397 | 223 | em->block_start = 0; |
a061fc8d | 224 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
d1310b2e | 225 | |
890871be | 226 | write_lock(&em_tree->lock); |
09a2a8f9 | 227 | ret = add_extent_mapping(em_tree, em, 0); |
5f39d397 CM |
228 | if (ret == -EEXIST) { |
229 | free_extent_map(em); | |
7b13b7b1 | 230 | em = lookup_extent_mapping(em_tree, start, len); |
b4f359ab | 231 | if (!em) |
0433f20d | 232 | em = ERR_PTR(-EIO); |
5f39d397 | 233 | } else if (ret) { |
7b13b7b1 | 234 | free_extent_map(em); |
0433f20d | 235 | em = ERR_PTR(ret); |
5f39d397 | 236 | } |
890871be | 237 | write_unlock(&em_tree->lock); |
7b13b7b1 | 238 | |
5f39d397 CM |
239 | out: |
240 | return em; | |
7eccb903 CM |
241 | } |
242 | ||
b0496686 | 243 | u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
19c00ddc | 244 | { |
0b947aff | 245 | return btrfs_crc32c(seed, data, len); |
19c00ddc CM |
246 | } |
247 | ||
248 | void btrfs_csum_final(u32 crc, char *result) | |
249 | { | |
7e75bf3f | 250 | put_unaligned_le32(~crc, result); |
19c00ddc CM |
251 | } |
252 | ||
d352ac68 CM |
253 | /* |
254 | * compute the csum for a btree block, and either verify it or write it | |
255 | * into the csum field of the block. | |
256 | */ | |
19c00ddc CM |
257 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
258 | int verify) | |
259 | { | |
6c41761f | 260 | u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy); |
607d432d | 261 | char *result = NULL; |
19c00ddc CM |
262 | unsigned long len; |
263 | unsigned long cur_len; | |
264 | unsigned long offset = BTRFS_CSUM_SIZE; | |
19c00ddc CM |
265 | char *kaddr; |
266 | unsigned long map_start; | |
267 | unsigned long map_len; | |
268 | int err; | |
269 | u32 crc = ~(u32)0; | |
607d432d | 270 | unsigned long inline_result; |
19c00ddc CM |
271 | |
272 | len = buf->len - offset; | |
d397712b | 273 | while (len > 0) { |
19c00ddc | 274 | err = map_private_extent_buffer(buf, offset, 32, |
a6591715 | 275 | &kaddr, &map_start, &map_len); |
d397712b | 276 | if (err) |
19c00ddc | 277 | return 1; |
19c00ddc | 278 | cur_len = min(len, map_len - (offset - map_start)); |
b0496686 | 279 | crc = btrfs_csum_data(kaddr + offset - map_start, |
19c00ddc CM |
280 | crc, cur_len); |
281 | len -= cur_len; | |
282 | offset += cur_len; | |
19c00ddc | 283 | } |
607d432d JB |
284 | if (csum_size > sizeof(inline_result)) { |
285 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); | |
286 | if (!result) | |
287 | return 1; | |
288 | } else { | |
289 | result = (char *)&inline_result; | |
290 | } | |
291 | ||
19c00ddc CM |
292 | btrfs_csum_final(crc, result); |
293 | ||
294 | if (verify) { | |
607d432d | 295 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
e4204ded CM |
296 | u32 val; |
297 | u32 found = 0; | |
607d432d | 298 | memcpy(&found, result, csum_size); |
e4204ded | 299 | |
607d432d | 300 | read_extent_buffer(buf, &val, 0, csum_size); |
efe120a0 FH |
301 | printk_ratelimited(KERN_INFO |
302 | "BTRFS: %s checksum verify failed on %llu wanted %X found %X " | |
303 | "level %d\n", | |
304 | root->fs_info->sb->s_id, buf->start, | |
305 | val, found, btrfs_header_level(buf)); | |
607d432d JB |
306 | if (result != (char *)&inline_result) |
307 | kfree(result); | |
19c00ddc CM |
308 | return 1; |
309 | } | |
310 | } else { | |
607d432d | 311 | write_extent_buffer(buf, result, 0, csum_size); |
19c00ddc | 312 | } |
607d432d JB |
313 | if (result != (char *)&inline_result) |
314 | kfree(result); | |
19c00ddc CM |
315 | return 0; |
316 | } | |
317 | ||
d352ac68 CM |
318 | /* |
319 | * we can't consider a given block up to date unless the transid of the | |
320 | * block matches the transid in the parent node's pointer. This is how we | |
321 | * detect blocks that either didn't get written at all or got written | |
322 | * in the wrong place. | |
323 | */ | |
1259ab75 | 324 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
b9fab919 CM |
325 | struct extent_buffer *eb, u64 parent_transid, |
326 | int atomic) | |
1259ab75 | 327 | { |
2ac55d41 | 328 | struct extent_state *cached_state = NULL; |
1259ab75 | 329 | int ret; |
a26e8c9f JB |
330 | bool need_lock = (current->journal_info == |
331 | (void *)BTRFS_SEND_TRANS_STUB); | |
1259ab75 CM |
332 | |
333 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) | |
334 | return 0; | |
335 | ||
b9fab919 CM |
336 | if (atomic) |
337 | return -EAGAIN; | |
338 | ||
a26e8c9f JB |
339 | if (need_lock) { |
340 | btrfs_tree_read_lock(eb); | |
341 | btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); | |
342 | } | |
343 | ||
2ac55d41 | 344 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
d0082371 | 345 | 0, &cached_state); |
0b32f4bb | 346 | if (extent_buffer_uptodate(eb) && |
1259ab75 CM |
347 | btrfs_header_generation(eb) == parent_transid) { |
348 | ret = 0; | |
349 | goto out; | |
350 | } | |
7a36ddec | 351 | printk_ratelimited("parent transid verify failed on %llu wanted %llu " |
193f284d | 352 | "found %llu\n", |
c1c9ff7c | 353 | eb->start, parent_transid, btrfs_header_generation(eb)); |
1259ab75 | 354 | ret = 1; |
a26e8c9f JB |
355 | |
356 | /* | |
357 | * Things reading via commit roots that don't have normal protection, | |
358 | * like send, can have a really old block in cache that may point at a | |
359 | * block that has been free'd and re-allocated. So don't clear uptodate | |
360 | * if we find an eb that is under IO (dirty/writeback) because we could | |
361 | * end up reading in the stale data and then writing it back out and | |
362 | * making everybody very sad. | |
363 | */ | |
364 | if (!extent_buffer_under_io(eb)) | |
365 | clear_extent_buffer_uptodate(eb); | |
33958dc6 | 366 | out: |
2ac55d41 JB |
367 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
368 | &cached_state, GFP_NOFS); | |
472b909f JB |
369 | if (need_lock) |
370 | btrfs_tree_read_unlock_blocking(eb); | |
1259ab75 | 371 | return ret; |
1259ab75 CM |
372 | } |
373 | ||
1104a885 DS |
374 | /* |
375 | * Return 0 if the superblock checksum type matches the checksum value of that | |
376 | * algorithm. Pass the raw disk superblock data. | |
377 | */ | |
378 | static int btrfs_check_super_csum(char *raw_disk_sb) | |
379 | { | |
380 | struct btrfs_super_block *disk_sb = | |
381 | (struct btrfs_super_block *)raw_disk_sb; | |
382 | u16 csum_type = btrfs_super_csum_type(disk_sb); | |
383 | int ret = 0; | |
384 | ||
385 | if (csum_type == BTRFS_CSUM_TYPE_CRC32) { | |
386 | u32 crc = ~(u32)0; | |
387 | const int csum_size = sizeof(crc); | |
388 | char result[csum_size]; | |
389 | ||
390 | /* | |
391 | * The super_block structure does not span the whole | |
392 | * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space | |
393 | * is filled with zeros and is included in the checkum. | |
394 | */ | |
395 | crc = btrfs_csum_data(raw_disk_sb + BTRFS_CSUM_SIZE, | |
396 | crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); | |
397 | btrfs_csum_final(crc, result); | |
398 | ||
399 | if (memcmp(raw_disk_sb, result, csum_size)) | |
400 | ret = 1; | |
667e7d94 CM |
401 | |
402 | if (ret && btrfs_super_generation(disk_sb) < 10) { | |
efe120a0 FH |
403 | printk(KERN_WARNING |
404 | "BTRFS: super block crcs don't match, older mkfs detected\n"); | |
667e7d94 CM |
405 | ret = 0; |
406 | } | |
1104a885 DS |
407 | } |
408 | ||
409 | if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { | |
efe120a0 | 410 | printk(KERN_ERR "BTRFS: unsupported checksum algorithm %u\n", |
1104a885 DS |
411 | csum_type); |
412 | ret = 1; | |
413 | } | |
414 | ||
415 | return ret; | |
416 | } | |
417 | ||
d352ac68 CM |
418 | /* |
419 | * helper to read a given tree block, doing retries as required when | |
420 | * the checksums don't match and we have alternate mirrors to try. | |
421 | */ | |
f188591e CM |
422 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
423 | struct extent_buffer *eb, | |
ca7a79ad | 424 | u64 start, u64 parent_transid) |
f188591e CM |
425 | { |
426 | struct extent_io_tree *io_tree; | |
ea466794 | 427 | int failed = 0; |
f188591e CM |
428 | int ret; |
429 | int num_copies = 0; | |
430 | int mirror_num = 0; | |
ea466794 | 431 | int failed_mirror = 0; |
f188591e | 432 | |
a826d6dc | 433 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
f188591e CM |
434 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
435 | while (1) { | |
bb82ab88 AJ |
436 | ret = read_extent_buffer_pages(io_tree, eb, start, |
437 | WAIT_COMPLETE, | |
f188591e | 438 | btree_get_extent, mirror_num); |
256dd1bb SB |
439 | if (!ret) { |
440 | if (!verify_parent_transid(io_tree, eb, | |
b9fab919 | 441 | parent_transid, 0)) |
256dd1bb SB |
442 | break; |
443 | else | |
444 | ret = -EIO; | |
445 | } | |
d397712b | 446 | |
a826d6dc JB |
447 | /* |
448 | * This buffer's crc is fine, but its contents are corrupted, so | |
449 | * there is no reason to read the other copies, they won't be | |
450 | * any less wrong. | |
451 | */ | |
452 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) | |
ea466794 JB |
453 | break; |
454 | ||
5d964051 | 455 | num_copies = btrfs_num_copies(root->fs_info, |
f188591e | 456 | eb->start, eb->len); |
4235298e | 457 | if (num_copies == 1) |
ea466794 | 458 | break; |
4235298e | 459 | |
5cf1ab56 JB |
460 | if (!failed_mirror) { |
461 | failed = 1; | |
462 | failed_mirror = eb->read_mirror; | |
463 | } | |
464 | ||
f188591e | 465 | mirror_num++; |
ea466794 JB |
466 | if (mirror_num == failed_mirror) |
467 | mirror_num++; | |
468 | ||
4235298e | 469 | if (mirror_num > num_copies) |
ea466794 | 470 | break; |
f188591e | 471 | } |
ea466794 | 472 | |
c0901581 | 473 | if (failed && !ret && failed_mirror) |
ea466794 JB |
474 | repair_eb_io_failure(root, eb, failed_mirror); |
475 | ||
476 | return ret; | |
f188591e | 477 | } |
19c00ddc | 478 | |
d352ac68 | 479 | /* |
d397712b CM |
480 | * checksum a dirty tree block before IO. This has extra checks to make sure |
481 | * we only fill in the checksum field in the first page of a multi-page block | |
d352ac68 | 482 | */ |
d397712b | 483 | |
b2950863 | 484 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
19c00ddc | 485 | { |
4eee4fa4 | 486 | u64 start = page_offset(page); |
19c00ddc | 487 | u64 found_start; |
19c00ddc | 488 | struct extent_buffer *eb; |
f188591e | 489 | |
4f2de97a JB |
490 | eb = (struct extent_buffer *)page->private; |
491 | if (page != eb->pages[0]) | |
492 | return 0; | |
19c00ddc | 493 | found_start = btrfs_header_bytenr(eb); |
fae7f21c | 494 | if (WARN_ON(found_start != start || !PageUptodate(page))) |
4f2de97a | 495 | return 0; |
19c00ddc | 496 | csum_tree_block(root, eb, 0); |
19c00ddc CM |
497 | return 0; |
498 | } | |
499 | ||
2b82032c YZ |
500 | static int check_tree_block_fsid(struct btrfs_root *root, |
501 | struct extent_buffer *eb) | |
502 | { | |
503 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; | |
504 | u8 fsid[BTRFS_UUID_SIZE]; | |
505 | int ret = 1; | |
506 | ||
0a4e5586 | 507 | read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); |
2b82032c YZ |
508 | while (fs_devices) { |
509 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { | |
510 | ret = 0; | |
511 | break; | |
512 | } | |
513 | fs_devices = fs_devices->seed; | |
514 | } | |
515 | return ret; | |
516 | } | |
517 | ||
a826d6dc | 518 | #define CORRUPT(reason, eb, root, slot) \ |
efe120a0 FH |
519 | btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu," \ |
520 | "root=%llu, slot=%d", reason, \ | |
c1c9ff7c | 521 | btrfs_header_bytenr(eb), root->objectid, slot) |
a826d6dc JB |
522 | |
523 | static noinline int check_leaf(struct btrfs_root *root, | |
524 | struct extent_buffer *leaf) | |
525 | { | |
526 | struct btrfs_key key; | |
527 | struct btrfs_key leaf_key; | |
528 | u32 nritems = btrfs_header_nritems(leaf); | |
529 | int slot; | |
530 | ||
531 | if (nritems == 0) | |
532 | return 0; | |
533 | ||
534 | /* Check the 0 item */ | |
535 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != | |
536 | BTRFS_LEAF_DATA_SIZE(root)) { | |
537 | CORRUPT("invalid item offset size pair", leaf, root, 0); | |
538 | return -EIO; | |
539 | } | |
540 | ||
541 | /* | |
542 | * Check to make sure each items keys are in the correct order and their | |
543 | * offsets make sense. We only have to loop through nritems-1 because | |
544 | * we check the current slot against the next slot, which verifies the | |
545 | * next slot's offset+size makes sense and that the current's slot | |
546 | * offset is correct. | |
547 | */ | |
548 | for (slot = 0; slot < nritems - 1; slot++) { | |
549 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); | |
550 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); | |
551 | ||
552 | /* Make sure the keys are in the right order */ | |
553 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { | |
554 | CORRUPT("bad key order", leaf, root, slot); | |
555 | return -EIO; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Make sure the offset and ends are right, remember that the | |
560 | * item data starts at the end of the leaf and grows towards the | |
561 | * front. | |
562 | */ | |
563 | if (btrfs_item_offset_nr(leaf, slot) != | |
564 | btrfs_item_end_nr(leaf, slot + 1)) { | |
565 | CORRUPT("slot offset bad", leaf, root, slot); | |
566 | return -EIO; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Check to make sure that we don't point outside of the leaf, | |
571 | * just incase all the items are consistent to eachother, but | |
572 | * all point outside of the leaf. | |
573 | */ | |
574 | if (btrfs_item_end_nr(leaf, slot) > | |
575 | BTRFS_LEAF_DATA_SIZE(root)) { | |
576 | CORRUPT("slot end outside of leaf", leaf, root, slot); | |
577 | return -EIO; | |
578 | } | |
579 | } | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
facc8a22 MX |
584 | static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, |
585 | u64 phy_offset, struct page *page, | |
586 | u64 start, u64 end, int mirror) | |
ce9adaa5 | 587 | { |
ce9adaa5 CM |
588 | u64 found_start; |
589 | int found_level; | |
ce9adaa5 CM |
590 | struct extent_buffer *eb; |
591 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
f188591e | 592 | int ret = 0; |
727011e0 | 593 | int reads_done; |
ce9adaa5 | 594 | |
ce9adaa5 CM |
595 | if (!page->private) |
596 | goto out; | |
d397712b | 597 | |
4f2de97a | 598 | eb = (struct extent_buffer *)page->private; |
d397712b | 599 | |
0b32f4bb JB |
600 | /* the pending IO might have been the only thing that kept this buffer |
601 | * in memory. Make sure we have a ref for all this other checks | |
602 | */ | |
603 | extent_buffer_get(eb); | |
604 | ||
605 | reads_done = atomic_dec_and_test(&eb->io_pages); | |
727011e0 CM |
606 | if (!reads_done) |
607 | goto err; | |
f188591e | 608 | |
5cf1ab56 | 609 | eb->read_mirror = mirror; |
ea466794 JB |
610 | if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) { |
611 | ret = -EIO; | |
612 | goto err; | |
613 | } | |
614 | ||
ce9adaa5 | 615 | found_start = btrfs_header_bytenr(eb); |
727011e0 | 616 | if (found_start != eb->start) { |
efe120a0 | 617 | printk_ratelimited(KERN_INFO "BTRFS: bad tree block start " |
193f284d | 618 | "%llu %llu\n", |
c1c9ff7c | 619 | found_start, eb->start); |
f188591e | 620 | ret = -EIO; |
ce9adaa5 CM |
621 | goto err; |
622 | } | |
2b82032c | 623 | if (check_tree_block_fsid(root, eb)) { |
efe120a0 | 624 | printk_ratelimited(KERN_INFO "BTRFS: bad fsid on block %llu\n", |
c1c9ff7c | 625 | eb->start); |
1259ab75 CM |
626 | ret = -EIO; |
627 | goto err; | |
628 | } | |
ce9adaa5 | 629 | found_level = btrfs_header_level(eb); |
1c24c3ce | 630 | if (found_level >= BTRFS_MAX_LEVEL) { |
efe120a0 | 631 | btrfs_info(root->fs_info, "bad tree block level %d", |
1c24c3ce JB |
632 | (int)btrfs_header_level(eb)); |
633 | ret = -EIO; | |
634 | goto err; | |
635 | } | |
ce9adaa5 | 636 | |
85d4e461 CM |
637 | btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), |
638 | eb, found_level); | |
4008c04a | 639 | |
ce9adaa5 | 640 | ret = csum_tree_block(root, eb, 1); |
a826d6dc | 641 | if (ret) { |
f188591e | 642 | ret = -EIO; |
a826d6dc JB |
643 | goto err; |
644 | } | |
645 | ||
646 | /* | |
647 | * If this is a leaf block and it is corrupt, set the corrupt bit so | |
648 | * that we don't try and read the other copies of this block, just | |
649 | * return -EIO. | |
650 | */ | |
651 | if (found_level == 0 && check_leaf(root, eb)) { | |
652 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); | |
653 | ret = -EIO; | |
654 | } | |
ce9adaa5 | 655 | |
0b32f4bb JB |
656 | if (!ret) |
657 | set_extent_buffer_uptodate(eb); | |
ce9adaa5 | 658 | err: |
79fb65a1 JB |
659 | if (reads_done && |
660 | test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) | |
4bb31e92 | 661 | btree_readahead_hook(root, eb, eb->start, ret); |
4bb31e92 | 662 | |
53b381b3 DW |
663 | if (ret) { |
664 | /* | |
665 | * our io error hook is going to dec the io pages | |
666 | * again, we have to make sure it has something | |
667 | * to decrement | |
668 | */ | |
669 | atomic_inc(&eb->io_pages); | |
0b32f4bb | 670 | clear_extent_buffer_uptodate(eb); |
53b381b3 | 671 | } |
0b32f4bb | 672 | free_extent_buffer(eb); |
ce9adaa5 | 673 | out: |
f188591e | 674 | return ret; |
ce9adaa5 CM |
675 | } |
676 | ||
ea466794 | 677 | static int btree_io_failed_hook(struct page *page, int failed_mirror) |
4bb31e92 | 678 | { |
4bb31e92 AJ |
679 | struct extent_buffer *eb; |
680 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; | |
681 | ||
4f2de97a | 682 | eb = (struct extent_buffer *)page->private; |
ea466794 | 683 | set_bit(EXTENT_BUFFER_IOERR, &eb->bflags); |
5cf1ab56 | 684 | eb->read_mirror = failed_mirror; |
53b381b3 | 685 | atomic_dec(&eb->io_pages); |
ea466794 | 686 | if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) |
4bb31e92 | 687 | btree_readahead_hook(root, eb, eb->start, -EIO); |
4bb31e92 AJ |
688 | return -EIO; /* we fixed nothing */ |
689 | } | |
690 | ||
ce9adaa5 | 691 | static void end_workqueue_bio(struct bio *bio, int err) |
ce9adaa5 CM |
692 | { |
693 | struct end_io_wq *end_io_wq = bio->bi_private; | |
694 | struct btrfs_fs_info *fs_info; | |
9e0af237 LB |
695 | struct btrfs_workqueue *wq; |
696 | btrfs_work_func_t func; | |
ce9adaa5 | 697 | |
ce9adaa5 | 698 | fs_info = end_io_wq->info; |
ce9adaa5 | 699 | end_io_wq->error = err; |
d20f7043 | 700 | |
7b6d91da | 701 | if (bio->bi_rw & REQ_WRITE) { |
9e0af237 LB |
702 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) { |
703 | wq = fs_info->endio_meta_write_workers; | |
704 | func = btrfs_endio_meta_write_helper; | |
705 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_FREE_SPACE) { | |
706 | wq = fs_info->endio_freespace_worker; | |
707 | func = btrfs_freespace_write_helper; | |
708 | } else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { | |
709 | wq = fs_info->endio_raid56_workers; | |
710 | func = btrfs_endio_raid56_helper; | |
711 | } else { | |
712 | wq = fs_info->endio_write_workers; | |
713 | func = btrfs_endio_write_helper; | |
714 | } | |
d20f7043 | 715 | } else { |
9e0af237 LB |
716 | if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) { |
717 | wq = fs_info->endio_raid56_workers; | |
718 | func = btrfs_endio_raid56_helper; | |
719 | } else if (end_io_wq->metadata) { | |
720 | wq = fs_info->endio_meta_workers; | |
721 | func = btrfs_endio_meta_helper; | |
722 | } else { | |
723 | wq = fs_info->endio_workers; | |
724 | func = btrfs_endio_helper; | |
725 | } | |
d20f7043 | 726 | } |
9e0af237 LB |
727 | |
728 | btrfs_init_work(&end_io_wq->work, func, end_workqueue_fn, NULL, NULL); | |
729 | btrfs_queue_work(wq, &end_io_wq->work); | |
ce9adaa5 CM |
730 | } |
731 | ||
0cb59c99 JB |
732 | /* |
733 | * For the metadata arg you want | |
734 | * | |
735 | * 0 - if data | |
736 | * 1 - if normal metadta | |
737 | * 2 - if writing to the free space cache area | |
53b381b3 | 738 | * 3 - raid parity work |
0cb59c99 | 739 | */ |
22c59948 CM |
740 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
741 | int metadata) | |
0b86a832 | 742 | { |
ce9adaa5 | 743 | struct end_io_wq *end_io_wq; |
ce9adaa5 CM |
744 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
745 | if (!end_io_wq) | |
746 | return -ENOMEM; | |
747 | ||
748 | end_io_wq->private = bio->bi_private; | |
749 | end_io_wq->end_io = bio->bi_end_io; | |
22c59948 | 750 | end_io_wq->info = info; |
ce9adaa5 CM |
751 | end_io_wq->error = 0; |
752 | end_io_wq->bio = bio; | |
22c59948 | 753 | end_io_wq->metadata = metadata; |
ce9adaa5 CM |
754 | |
755 | bio->bi_private = end_io_wq; | |
756 | bio->bi_end_io = end_workqueue_bio; | |
22c59948 CM |
757 | return 0; |
758 | } | |
759 | ||
b64a2851 | 760 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
0986fe9e | 761 | { |
4854ddd0 | 762 | unsigned long limit = min_t(unsigned long, |
5cdc7ad3 | 763 | info->thread_pool_size, |
4854ddd0 CM |
764 | info->fs_devices->open_devices); |
765 | return 256 * limit; | |
766 | } | |
0986fe9e | 767 | |
4a69a410 CM |
768 | static void run_one_async_start(struct btrfs_work *work) |
769 | { | |
4a69a410 | 770 | struct async_submit_bio *async; |
79787eaa | 771 | int ret; |
4a69a410 CM |
772 | |
773 | async = container_of(work, struct async_submit_bio, work); | |
79787eaa JM |
774 | ret = async->submit_bio_start(async->inode, async->rw, async->bio, |
775 | async->mirror_num, async->bio_flags, | |
776 | async->bio_offset); | |
777 | if (ret) | |
778 | async->error = ret; | |
4a69a410 CM |
779 | } |
780 | ||
781 | static void run_one_async_done(struct btrfs_work *work) | |
8b712842 CM |
782 | { |
783 | struct btrfs_fs_info *fs_info; | |
784 | struct async_submit_bio *async; | |
4854ddd0 | 785 | int limit; |
8b712842 CM |
786 | |
787 | async = container_of(work, struct async_submit_bio, work); | |
788 | fs_info = BTRFS_I(async->inode)->root->fs_info; | |
4854ddd0 | 789 | |
b64a2851 | 790 | limit = btrfs_async_submit_limit(fs_info); |
4854ddd0 CM |
791 | limit = limit * 2 / 3; |
792 | ||
66657b31 | 793 | if (atomic_dec_return(&fs_info->nr_async_submits) < limit && |
b64a2851 | 794 | waitqueue_active(&fs_info->async_submit_wait)) |
4854ddd0 CM |
795 | wake_up(&fs_info->async_submit_wait); |
796 | ||
79787eaa JM |
797 | /* If an error occured we just want to clean up the bio and move on */ |
798 | if (async->error) { | |
799 | bio_endio(async->bio, async->error); | |
800 | return; | |
801 | } | |
802 | ||
4a69a410 | 803 | async->submit_bio_done(async->inode, async->rw, async->bio, |
eaf25d93 CM |
804 | async->mirror_num, async->bio_flags, |
805 | async->bio_offset); | |
4a69a410 CM |
806 | } |
807 | ||
808 | static void run_one_async_free(struct btrfs_work *work) | |
809 | { | |
810 | struct async_submit_bio *async; | |
811 | ||
812 | async = container_of(work, struct async_submit_bio, work); | |
8b712842 CM |
813 | kfree(async); |
814 | } | |
815 | ||
44b8bd7e CM |
816 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
817 | int rw, struct bio *bio, int mirror_num, | |
c8b97818 | 818 | unsigned long bio_flags, |
eaf25d93 | 819 | u64 bio_offset, |
4a69a410 CM |
820 | extent_submit_bio_hook_t *submit_bio_start, |
821 | extent_submit_bio_hook_t *submit_bio_done) | |
44b8bd7e CM |
822 | { |
823 | struct async_submit_bio *async; | |
824 | ||
825 | async = kmalloc(sizeof(*async), GFP_NOFS); | |
826 | if (!async) | |
827 | return -ENOMEM; | |
828 | ||
829 | async->inode = inode; | |
830 | async->rw = rw; | |
831 | async->bio = bio; | |
832 | async->mirror_num = mirror_num; | |
4a69a410 CM |
833 | async->submit_bio_start = submit_bio_start; |
834 | async->submit_bio_done = submit_bio_done; | |
835 | ||
9e0af237 | 836 | btrfs_init_work(&async->work, btrfs_worker_helper, run_one_async_start, |
5cdc7ad3 | 837 | run_one_async_done, run_one_async_free); |
4a69a410 | 838 | |
c8b97818 | 839 | async->bio_flags = bio_flags; |
eaf25d93 | 840 | async->bio_offset = bio_offset; |
8c8bee1d | 841 | |
79787eaa JM |
842 | async->error = 0; |
843 | ||
cb03c743 | 844 | atomic_inc(&fs_info->nr_async_submits); |
d313d7a3 | 845 | |
7b6d91da | 846 | if (rw & REQ_SYNC) |
5cdc7ad3 | 847 | btrfs_set_work_high_priority(&async->work); |
d313d7a3 | 848 | |
5cdc7ad3 | 849 | btrfs_queue_work(fs_info->workers, &async->work); |
9473f16c | 850 | |
d397712b | 851 | while (atomic_read(&fs_info->async_submit_draining) && |
771ed689 CM |
852 | atomic_read(&fs_info->nr_async_submits)) { |
853 | wait_event(fs_info->async_submit_wait, | |
854 | (atomic_read(&fs_info->nr_async_submits) == 0)); | |
855 | } | |
856 | ||
44b8bd7e CM |
857 | return 0; |
858 | } | |
859 | ||
ce3ed71a CM |
860 | static int btree_csum_one_bio(struct bio *bio) |
861 | { | |
2c30c71b | 862 | struct bio_vec *bvec; |
ce3ed71a | 863 | struct btrfs_root *root; |
2c30c71b | 864 | int i, ret = 0; |
ce3ed71a | 865 | |
2c30c71b | 866 | bio_for_each_segment_all(bvec, bio, i) { |
ce3ed71a | 867 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
79787eaa JM |
868 | ret = csum_dirty_buffer(root, bvec->bv_page); |
869 | if (ret) | |
870 | break; | |
ce3ed71a | 871 | } |
2c30c71b | 872 | |
79787eaa | 873 | return ret; |
ce3ed71a CM |
874 | } |
875 | ||
4a69a410 CM |
876 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
877 | struct bio *bio, int mirror_num, | |
eaf25d93 CM |
878 | unsigned long bio_flags, |
879 | u64 bio_offset) | |
22c59948 | 880 | { |
8b712842 CM |
881 | /* |
882 | * when we're called for a write, we're already in the async | |
5443be45 | 883 | * submission context. Just jump into btrfs_map_bio |
8b712842 | 884 | */ |
79787eaa | 885 | return btree_csum_one_bio(bio); |
4a69a410 | 886 | } |
22c59948 | 887 | |
4a69a410 | 888 | static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, |
eaf25d93 CM |
889 | int mirror_num, unsigned long bio_flags, |
890 | u64 bio_offset) | |
4a69a410 | 891 | { |
61891923 SB |
892 | int ret; |
893 | ||
8b712842 | 894 | /* |
4a69a410 CM |
895 | * when we're called for a write, we're already in the async |
896 | * submission context. Just jump into btrfs_map_bio | |
8b712842 | 897 | */ |
61891923 SB |
898 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
899 | if (ret) | |
900 | bio_endio(bio, ret); | |
901 | return ret; | |
0b86a832 CM |
902 | } |
903 | ||
de0022b9 JB |
904 | static int check_async_write(struct inode *inode, unsigned long bio_flags) |
905 | { | |
906 | if (bio_flags & EXTENT_BIO_TREE_LOG) | |
907 | return 0; | |
908 | #ifdef CONFIG_X86 | |
909 | if (cpu_has_xmm4_2) | |
910 | return 0; | |
911 | #endif | |
912 | return 1; | |
913 | } | |
914 | ||
44b8bd7e | 915 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
eaf25d93 CM |
916 | int mirror_num, unsigned long bio_flags, |
917 | u64 bio_offset) | |
44b8bd7e | 918 | { |
de0022b9 | 919 | int async = check_async_write(inode, bio_flags); |
cad321ad CM |
920 | int ret; |
921 | ||
7b6d91da | 922 | if (!(rw & REQ_WRITE)) { |
4a69a410 CM |
923 | /* |
924 | * called for a read, do the setup so that checksum validation | |
925 | * can happen in the async kernel threads | |
926 | */ | |
f3f266ab CM |
927 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
928 | bio, 1); | |
1d4284bd | 929 | if (ret) |
61891923 SB |
930 | goto out_w_error; |
931 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, | |
932 | mirror_num, 0); | |
de0022b9 JB |
933 | } else if (!async) { |
934 | ret = btree_csum_one_bio(bio); | |
935 | if (ret) | |
61891923 SB |
936 | goto out_w_error; |
937 | ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, | |
938 | mirror_num, 0); | |
939 | } else { | |
940 | /* | |
941 | * kthread helpers are used to submit writes so that | |
942 | * checksumming can happen in parallel across all CPUs | |
943 | */ | |
944 | ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, | |
945 | inode, rw, bio, mirror_num, 0, | |
946 | bio_offset, | |
947 | __btree_submit_bio_start, | |
948 | __btree_submit_bio_done); | |
44b8bd7e | 949 | } |
d313d7a3 | 950 | |
61891923 SB |
951 | if (ret) { |
952 | out_w_error: | |
953 | bio_endio(bio, ret); | |
954 | } | |
955 | return ret; | |
44b8bd7e CM |
956 | } |
957 | ||
3dd1462e | 958 | #ifdef CONFIG_MIGRATION |
784b4e29 | 959 | static int btree_migratepage(struct address_space *mapping, |
a6bc32b8 MG |
960 | struct page *newpage, struct page *page, |
961 | enum migrate_mode mode) | |
784b4e29 CM |
962 | { |
963 | /* | |
964 | * we can't safely write a btree page from here, | |
965 | * we haven't done the locking hook | |
966 | */ | |
967 | if (PageDirty(page)) | |
968 | return -EAGAIN; | |
969 | /* | |
970 | * Buffers may be managed in a filesystem specific way. | |
971 | * We must have no buffers or drop them. | |
972 | */ | |
973 | if (page_has_private(page) && | |
974 | !try_to_release_page(page, GFP_KERNEL)) | |
975 | return -EAGAIN; | |
a6bc32b8 | 976 | return migrate_page(mapping, newpage, page, mode); |
784b4e29 | 977 | } |
3dd1462e | 978 | #endif |
784b4e29 | 979 | |
0da5468f CM |
980 | |
981 | static int btree_writepages(struct address_space *mapping, | |
982 | struct writeback_control *wbc) | |
983 | { | |
e2d84521 MX |
984 | struct btrfs_fs_info *fs_info; |
985 | int ret; | |
986 | ||
d8d5f3e1 | 987 | if (wbc->sync_mode == WB_SYNC_NONE) { |
448d640b CM |
988 | |
989 | if (wbc->for_kupdate) | |
990 | return 0; | |
991 | ||
e2d84521 | 992 | fs_info = BTRFS_I(mapping->host)->root->fs_info; |
b9473439 | 993 | /* this is a bit racy, but that's ok */ |
e2d84521 MX |
994 | ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes, |
995 | BTRFS_DIRTY_METADATA_THRESH); | |
996 | if (ret < 0) | |
793955bc | 997 | return 0; |
793955bc | 998 | } |
0b32f4bb | 999 | return btree_write_cache_pages(mapping, wbc); |
0da5468f CM |
1000 | } |
1001 | ||
b2950863 | 1002 | static int btree_readpage(struct file *file, struct page *page) |
5f39d397 | 1003 | { |
d1310b2e CM |
1004 | struct extent_io_tree *tree; |
1005 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
8ddc7d9c | 1006 | return extent_read_full_page(tree, page, btree_get_extent, 0); |
5f39d397 | 1007 | } |
22b0ebda | 1008 | |
70dec807 | 1009 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
5f39d397 | 1010 | { |
98509cfc | 1011 | if (PageWriteback(page) || PageDirty(page)) |
d397712b | 1012 | return 0; |
0c4e538b | 1013 | |
f7a52a40 | 1014 | return try_release_extent_buffer(page); |
d98237b3 CM |
1015 | } |
1016 | ||
d47992f8 LC |
1017 | static void btree_invalidatepage(struct page *page, unsigned int offset, |
1018 | unsigned int length) | |
d98237b3 | 1019 | { |
d1310b2e CM |
1020 | struct extent_io_tree *tree; |
1021 | tree = &BTRFS_I(page->mapping->host)->io_tree; | |
5f39d397 CM |
1022 | extent_invalidatepage(tree, page, offset); |
1023 | btree_releasepage(page, GFP_NOFS); | |
9ad6b7bc | 1024 | if (PagePrivate(page)) { |
efe120a0 FH |
1025 | btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info, |
1026 | "page private not zero on page %llu", | |
1027 | (unsigned long long)page_offset(page)); | |
9ad6b7bc CM |
1028 | ClearPagePrivate(page); |
1029 | set_page_private(page, 0); | |
1030 | page_cache_release(page); | |
1031 | } | |
d98237b3 CM |
1032 | } |
1033 | ||
0b32f4bb JB |
1034 | static int btree_set_page_dirty(struct page *page) |
1035 | { | |
bb146eb2 | 1036 | #ifdef DEBUG |
0b32f4bb JB |
1037 | struct extent_buffer *eb; |
1038 | ||
1039 | BUG_ON(!PagePrivate(page)); | |
1040 | eb = (struct extent_buffer *)page->private; | |
1041 | BUG_ON(!eb); | |
1042 | BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); | |
1043 | BUG_ON(!atomic_read(&eb->refs)); | |
1044 | btrfs_assert_tree_locked(eb); | |
bb146eb2 | 1045 | #endif |
0b32f4bb JB |
1046 | return __set_page_dirty_nobuffers(page); |
1047 | } | |
1048 | ||
7f09410b | 1049 | static const struct address_space_operations btree_aops = { |
d98237b3 | 1050 | .readpage = btree_readpage, |
0da5468f | 1051 | .writepages = btree_writepages, |
5f39d397 CM |
1052 | .releasepage = btree_releasepage, |
1053 | .invalidatepage = btree_invalidatepage, | |
5a92bc88 | 1054 | #ifdef CONFIG_MIGRATION |
784b4e29 | 1055 | .migratepage = btree_migratepage, |
5a92bc88 | 1056 | #endif |
0b32f4bb | 1057 | .set_page_dirty = btree_set_page_dirty, |
d98237b3 CM |
1058 | }; |
1059 | ||
ca7a79ad CM |
1060 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
1061 | u64 parent_transid) | |
090d1875 | 1062 | { |
5f39d397 CM |
1063 | struct extent_buffer *buf = NULL; |
1064 | struct inode *btree_inode = root->fs_info->btree_inode; | |
de428b63 | 1065 | int ret = 0; |
090d1875 | 1066 | |
db94535d | 1067 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
5f39d397 | 1068 | if (!buf) |
090d1875 | 1069 | return 0; |
d1310b2e | 1070 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
bb82ab88 | 1071 | buf, 0, WAIT_NONE, btree_get_extent, 0); |
5f39d397 | 1072 | free_extent_buffer(buf); |
de428b63 | 1073 | return ret; |
090d1875 CM |
1074 | } |
1075 | ||
ab0fff03 AJ |
1076 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
1077 | int mirror_num, struct extent_buffer **eb) | |
1078 | { | |
1079 | struct extent_buffer *buf = NULL; | |
1080 | struct inode *btree_inode = root->fs_info->btree_inode; | |
1081 | struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree; | |
1082 | int ret; | |
1083 | ||
1084 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); | |
1085 | if (!buf) | |
1086 | return 0; | |
1087 | ||
1088 | set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags); | |
1089 | ||
1090 | ret = read_extent_buffer_pages(io_tree, buf, 0, WAIT_PAGE_LOCK, | |
1091 | btree_get_extent, mirror_num); | |
1092 | if (ret) { | |
1093 | free_extent_buffer(buf); | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) { | |
1098 | free_extent_buffer(buf); | |
1099 | return -EIO; | |
0b32f4bb | 1100 | } else if (extent_buffer_uptodate(buf)) { |
ab0fff03 AJ |
1101 | *eb = buf; |
1102 | } else { | |
1103 | free_extent_buffer(buf); | |
1104 | } | |
1105 | return 0; | |
1106 | } | |
1107 | ||
0999df54 CM |
1108 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
1109 | u64 bytenr, u32 blocksize) | |
1110 | { | |
f28491e0 | 1111 | return find_extent_buffer(root->fs_info, bytenr); |
0999df54 CM |
1112 | } |
1113 | ||
1114 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, | |
1115 | u64 bytenr, u32 blocksize) | |
1116 | { | |
faa2dbf0 JB |
1117 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
1118 | if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state))) | |
1119 | return alloc_test_extent_buffer(root->fs_info, bytenr, | |
1120 | blocksize); | |
1121 | #endif | |
f28491e0 | 1122 | return alloc_extent_buffer(root->fs_info, bytenr, blocksize); |
0999df54 CM |
1123 | } |
1124 | ||
1125 | ||
e02119d5 CM |
1126 | int btrfs_write_tree_block(struct extent_buffer *buf) |
1127 | { | |
727011e0 | 1128 | return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start, |
8aa38c31 | 1129 | buf->start + buf->len - 1); |
e02119d5 CM |
1130 | } |
1131 | ||
1132 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) | |
1133 | { | |
727011e0 | 1134 | return filemap_fdatawait_range(buf->pages[0]->mapping, |
8aa38c31 | 1135 | buf->start, buf->start + buf->len - 1); |
e02119d5 CM |
1136 | } |
1137 | ||
0999df54 | 1138 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
ca7a79ad | 1139 | u32 blocksize, u64 parent_transid) |
0999df54 CM |
1140 | { |
1141 | struct extent_buffer *buf = NULL; | |
0999df54 CM |
1142 | int ret; |
1143 | ||
0999df54 CM |
1144 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
1145 | if (!buf) | |
1146 | return NULL; | |
0999df54 | 1147 | |
ca7a79ad | 1148 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
0f0fe8f7 FDBM |
1149 | if (ret) { |
1150 | free_extent_buffer(buf); | |
1151 | return NULL; | |
1152 | } | |
5f39d397 | 1153 | return buf; |
ce9adaa5 | 1154 | |
eb60ceac CM |
1155 | } |
1156 | ||
d5c13f92 JM |
1157 | void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1158 | struct extent_buffer *buf) | |
ed2ff2cb | 1159 | { |
e2d84521 MX |
1160 | struct btrfs_fs_info *fs_info = root->fs_info; |
1161 | ||
55c69072 | 1162 | if (btrfs_header_generation(buf) == |
e2d84521 | 1163 | fs_info->running_transaction->transid) { |
b9447ef8 | 1164 | btrfs_assert_tree_locked(buf); |
b4ce94de | 1165 | |
b9473439 | 1166 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
e2d84521 MX |
1167 | __percpu_counter_add(&fs_info->dirty_metadata_bytes, |
1168 | -buf->len, | |
1169 | fs_info->dirty_metadata_batch); | |
ed7b63eb JB |
1170 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
1171 | btrfs_set_lock_blocking(buf); | |
1172 | clear_extent_buffer_dirty(buf); | |
1173 | } | |
925baedd | 1174 | } |
5f39d397 CM |
1175 | } |
1176 | ||
8257b2dc MX |
1177 | static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void) |
1178 | { | |
1179 | struct btrfs_subvolume_writers *writers; | |
1180 | int ret; | |
1181 | ||
1182 | writers = kmalloc(sizeof(*writers), GFP_NOFS); | |
1183 | if (!writers) | |
1184 | return ERR_PTR(-ENOMEM); | |
1185 | ||
1186 | ret = percpu_counter_init(&writers->counter, 0); | |
1187 | if (ret < 0) { | |
1188 | kfree(writers); | |
1189 | return ERR_PTR(ret); | |
1190 | } | |
1191 | ||
1192 | init_waitqueue_head(&writers->wait); | |
1193 | return writers; | |
1194 | } | |
1195 | ||
1196 | static void | |
1197 | btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers) | |
1198 | { | |
1199 | percpu_counter_destroy(&writers->counter); | |
1200 | kfree(writers); | |
1201 | } | |
1202 | ||
143bede5 JM |
1203 | static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
1204 | u32 stripesize, struct btrfs_root *root, | |
1205 | struct btrfs_fs_info *fs_info, | |
1206 | u64 objectid) | |
d97e63b6 | 1207 | { |
cfaa7295 | 1208 | root->node = NULL; |
a28ec197 | 1209 | root->commit_root = NULL; |
db94535d CM |
1210 | root->sectorsize = sectorsize; |
1211 | root->nodesize = nodesize; | |
1212 | root->leafsize = leafsize; | |
87ee04eb | 1213 | root->stripesize = stripesize; |
27cdeb70 | 1214 | root->state = 0; |
d68fc57b | 1215 | root->orphan_cleanup_state = 0; |
0b86a832 | 1216 | |
0f7d52f4 CM |
1217 | root->objectid = objectid; |
1218 | root->last_trans = 0; | |
13a8a7c8 | 1219 | root->highest_objectid = 0; |
eb73c1b7 | 1220 | root->nr_delalloc_inodes = 0; |
199c2a9c | 1221 | root->nr_ordered_extents = 0; |
58176a96 | 1222 | root->name = NULL; |
6bef4d31 | 1223 | root->inode_tree = RB_ROOT; |
16cdcec7 | 1224 | INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC); |
f0486c68 | 1225 | root->block_rsv = NULL; |
d68fc57b | 1226 | root->orphan_block_rsv = NULL; |
0b86a832 CM |
1227 | |
1228 | INIT_LIST_HEAD(&root->dirty_list); | |
5d4f98a2 | 1229 | INIT_LIST_HEAD(&root->root_list); |
eb73c1b7 MX |
1230 | INIT_LIST_HEAD(&root->delalloc_inodes); |
1231 | INIT_LIST_HEAD(&root->delalloc_root); | |
199c2a9c MX |
1232 | INIT_LIST_HEAD(&root->ordered_extents); |
1233 | INIT_LIST_HEAD(&root->ordered_root); | |
2ab28f32 JB |
1234 | INIT_LIST_HEAD(&root->logged_list[0]); |
1235 | INIT_LIST_HEAD(&root->logged_list[1]); | |
d68fc57b | 1236 | spin_lock_init(&root->orphan_lock); |
5d4f98a2 | 1237 | spin_lock_init(&root->inode_lock); |
eb73c1b7 | 1238 | spin_lock_init(&root->delalloc_lock); |
199c2a9c | 1239 | spin_lock_init(&root->ordered_extent_lock); |
f0486c68 | 1240 | spin_lock_init(&root->accounting_lock); |
2ab28f32 JB |
1241 | spin_lock_init(&root->log_extents_lock[0]); |
1242 | spin_lock_init(&root->log_extents_lock[1]); | |
a2135011 | 1243 | mutex_init(&root->objectid_mutex); |
e02119d5 | 1244 | mutex_init(&root->log_mutex); |
31f3d255 | 1245 | mutex_init(&root->ordered_extent_mutex); |
573bfb72 | 1246 | mutex_init(&root->delalloc_mutex); |
7237f183 YZ |
1247 | init_waitqueue_head(&root->log_writer_wait); |
1248 | init_waitqueue_head(&root->log_commit_wait[0]); | |
1249 | init_waitqueue_head(&root->log_commit_wait[1]); | |
8b050d35 MX |
1250 | INIT_LIST_HEAD(&root->log_ctxs[0]); |
1251 | INIT_LIST_HEAD(&root->log_ctxs[1]); | |
7237f183 YZ |
1252 | atomic_set(&root->log_commit[0], 0); |
1253 | atomic_set(&root->log_commit[1], 0); | |
1254 | atomic_set(&root->log_writers, 0); | |
2ecb7923 | 1255 | atomic_set(&root->log_batch, 0); |
8a35d95f | 1256 | atomic_set(&root->orphan_inodes, 0); |
b0feb9d9 | 1257 | atomic_set(&root->refs, 1); |
8257b2dc | 1258 | atomic_set(&root->will_be_snapshoted, 0); |
7237f183 | 1259 | root->log_transid = 0; |
d1433deb | 1260 | root->log_transid_committed = -1; |
257c62e1 | 1261 | root->last_log_commit = 0; |
06ea65a3 JB |
1262 | if (fs_info) |
1263 | extent_io_tree_init(&root->dirty_log_pages, | |
1264 | fs_info->btree_inode->i_mapping); | |
017e5369 | 1265 | |
3768f368 CM |
1266 | memset(&root->root_key, 0, sizeof(root->root_key)); |
1267 | memset(&root->root_item, 0, sizeof(root->root_item)); | |
6702ed49 | 1268 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
58176a96 | 1269 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
06ea65a3 JB |
1270 | if (fs_info) |
1271 | root->defrag_trans_start = fs_info->generation; | |
1272 | else | |
1273 | root->defrag_trans_start = 0; | |
58176a96 | 1274 | init_completion(&root->kobj_unregister); |
4d775673 | 1275 | root->root_key.objectid = objectid; |
0ee5dc67 | 1276 | root->anon_dev = 0; |
8ea05e3a | 1277 | |
5f3ab90a | 1278 | spin_lock_init(&root->root_item_lock); |
3768f368 CM |
1279 | } |
1280 | ||
f84a8bd6 | 1281 | static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info) |
6f07e42e AV |
1282 | { |
1283 | struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS); | |
1284 | if (root) | |
1285 | root->fs_info = fs_info; | |
1286 | return root; | |
1287 | } | |
1288 | ||
06ea65a3 JB |
1289 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
1290 | /* Should only be used by the testing infrastructure */ | |
1291 | struct btrfs_root *btrfs_alloc_dummy_root(void) | |
1292 | { | |
1293 | struct btrfs_root *root; | |
1294 | ||
1295 | root = btrfs_alloc_root(NULL); | |
1296 | if (!root) | |
1297 | return ERR_PTR(-ENOMEM); | |
1298 | __setup_root(4096, 4096, 4096, 4096, root, NULL, 1); | |
27cdeb70 | 1299 | set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state); |
faa2dbf0 | 1300 | root->alloc_bytenr = 0; |
06ea65a3 JB |
1301 | |
1302 | return root; | |
1303 | } | |
1304 | #endif | |
1305 | ||
20897f5c AJ |
1306 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
1307 | struct btrfs_fs_info *fs_info, | |
1308 | u64 objectid) | |
1309 | { | |
1310 | struct extent_buffer *leaf; | |
1311 | struct btrfs_root *tree_root = fs_info->tree_root; | |
1312 | struct btrfs_root *root; | |
1313 | struct btrfs_key key; | |
1314 | int ret = 0; | |
6463fe58 | 1315 | uuid_le uuid; |
20897f5c AJ |
1316 | |
1317 | root = btrfs_alloc_root(fs_info); | |
1318 | if (!root) | |
1319 | return ERR_PTR(-ENOMEM); | |
1320 | ||
1321 | __setup_root(tree_root->nodesize, tree_root->leafsize, | |
1322 | tree_root->sectorsize, tree_root->stripesize, | |
1323 | root, fs_info, objectid); | |
1324 | root->root_key.objectid = objectid; | |
1325 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1326 | root->root_key.offset = 0; | |
1327 | ||
1328 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, | |
1329 | 0, objectid, NULL, 0, 0, 0); | |
1330 | if (IS_ERR(leaf)) { | |
1331 | ret = PTR_ERR(leaf); | |
1dd05682 | 1332 | leaf = NULL; |
20897f5c AJ |
1333 | goto fail; |
1334 | } | |
1335 | ||
20897f5c AJ |
1336 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
1337 | btrfs_set_header_bytenr(leaf, leaf->start); | |
1338 | btrfs_set_header_generation(leaf, trans->transid); | |
1339 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1340 | btrfs_set_header_owner(leaf, objectid); | |
1341 | root->node = leaf; | |
1342 | ||
0a4e5586 | 1343 | write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), |
20897f5c AJ |
1344 | BTRFS_FSID_SIZE); |
1345 | write_extent_buffer(leaf, fs_info->chunk_tree_uuid, | |
b308bc2f | 1346 | btrfs_header_chunk_tree_uuid(leaf), |
20897f5c AJ |
1347 | BTRFS_UUID_SIZE); |
1348 | btrfs_mark_buffer_dirty(leaf); | |
1349 | ||
1350 | root->commit_root = btrfs_root_node(root); | |
27cdeb70 | 1351 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); |
20897f5c AJ |
1352 | |
1353 | root->root_item.flags = 0; | |
1354 | root->root_item.byte_limit = 0; | |
1355 | btrfs_set_root_bytenr(&root->root_item, leaf->start); | |
1356 | btrfs_set_root_generation(&root->root_item, trans->transid); | |
1357 | btrfs_set_root_level(&root->root_item, 0); | |
1358 | btrfs_set_root_refs(&root->root_item, 1); | |
1359 | btrfs_set_root_used(&root->root_item, leaf->len); | |
1360 | btrfs_set_root_last_snapshot(&root->root_item, 0); | |
1361 | btrfs_set_root_dirid(&root->root_item, 0); | |
6463fe58 SB |
1362 | uuid_le_gen(&uuid); |
1363 | memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE); | |
20897f5c AJ |
1364 | root->root_item.drop_level = 0; |
1365 | ||
1366 | key.objectid = objectid; | |
1367 | key.type = BTRFS_ROOT_ITEM_KEY; | |
1368 | key.offset = 0; | |
1369 | ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item); | |
1370 | if (ret) | |
1371 | goto fail; | |
1372 | ||
1373 | btrfs_tree_unlock(leaf); | |
1374 | ||
1dd05682 TI |
1375 | return root; |
1376 | ||
20897f5c | 1377 | fail: |
1dd05682 TI |
1378 | if (leaf) { |
1379 | btrfs_tree_unlock(leaf); | |
59885b39 | 1380 | free_extent_buffer(root->commit_root); |
1dd05682 TI |
1381 | free_extent_buffer(leaf); |
1382 | } | |
1383 | kfree(root); | |
20897f5c | 1384 | |
1dd05682 | 1385 | return ERR_PTR(ret); |
20897f5c AJ |
1386 | } |
1387 | ||
7237f183 YZ |
1388 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
1389 | struct btrfs_fs_info *fs_info) | |
0f7d52f4 CM |
1390 | { |
1391 | struct btrfs_root *root; | |
1392 | struct btrfs_root *tree_root = fs_info->tree_root; | |
7237f183 | 1393 | struct extent_buffer *leaf; |
e02119d5 | 1394 | |
6f07e42e | 1395 | root = btrfs_alloc_root(fs_info); |
e02119d5 | 1396 | if (!root) |
7237f183 | 1397 | return ERR_PTR(-ENOMEM); |
e02119d5 CM |
1398 | |
1399 | __setup_root(tree_root->nodesize, tree_root->leafsize, | |
1400 | tree_root->sectorsize, tree_root->stripesize, | |
1401 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); | |
1402 | ||
1403 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; | |
1404 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; | |
1405 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; | |
27cdeb70 | 1406 | |
7237f183 | 1407 | /* |
27cdeb70 MX |
1408 | * DON'T set REF_COWS for log trees |
1409 | * | |
7237f183 YZ |
1410 | * log trees do not get reference counted because they go away |
1411 | * before a real commit is actually done. They do store pointers | |
1412 | * to file data extents, and those reference counts still get | |
1413 | * updated (along with back refs to the log tree). | |
1414 | */ | |
e02119d5 | 1415 | |
5d4f98a2 | 1416 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
66d7e7f0 | 1417 | BTRFS_TREE_LOG_OBJECTID, NULL, |
5581a51a | 1418 | 0, 0, 0); |
7237f183 YZ |
1419 | if (IS_ERR(leaf)) { |
1420 | kfree(root); | |
1421 | return ERR_CAST(leaf); | |
1422 | } | |
e02119d5 | 1423 | |
5d4f98a2 YZ |
1424 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
1425 | btrfs_set_header_bytenr(leaf, leaf->start); | |
1426 | btrfs_set_header_generation(leaf, trans->transid); | |
1427 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); | |
1428 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); | |
7237f183 | 1429 | root->node = leaf; |
e02119d5 CM |
1430 | |
1431 | write_extent_buffer(root->node, root->fs_info->fsid, | |
0a4e5586 | 1432 | btrfs_header_fsid(), BTRFS_FSID_SIZE); |
e02119d5 CM |
1433 | btrfs_mark_buffer_dirty(root->node); |
1434 | btrfs_tree_unlock(root->node); | |
7237f183 YZ |
1435 | return root; |
1436 | } | |
1437 | ||
1438 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
1439 | struct btrfs_fs_info *fs_info) | |
1440 | { | |
1441 | struct btrfs_root *log_root; | |
1442 | ||
1443 | log_root = alloc_log_tree(trans, fs_info); | |
1444 | if (IS_ERR(log_root)) | |
1445 | return PTR_ERR(log_root); | |
1446 | WARN_ON(fs_info->log_root_tree); | |
1447 | fs_info->log_root_tree = log_root; | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
1452 | struct btrfs_root *root) | |
1453 | { | |
1454 | struct btrfs_root *log_root; | |
1455 | struct btrfs_inode_item *inode_item; | |
1456 | ||
1457 | log_root = alloc_log_tree(trans, root->fs_info); | |
1458 | if (IS_ERR(log_root)) | |
1459 | return PTR_ERR(log_root); | |
1460 | ||
1461 | log_root->last_trans = trans->transid; | |
1462 | log_root->root_key.offset = root->root_key.objectid; | |
1463 | ||
1464 | inode_item = &log_root->root_item.inode; | |
3cae210f QW |
1465 | btrfs_set_stack_inode_generation(inode_item, 1); |
1466 | btrfs_set_stack_inode_size(inode_item, 3); | |
1467 | btrfs_set_stack_inode_nlink(inode_item, 1); | |
1468 | btrfs_set_stack_inode_nbytes(inode_item, root->leafsize); | |
1469 | btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755); | |
7237f183 | 1470 | |
5d4f98a2 | 1471 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
7237f183 YZ |
1472 | |
1473 | WARN_ON(root->log_root); | |
1474 | root->log_root = log_root; | |
1475 | root->log_transid = 0; | |
d1433deb | 1476 | root->log_transid_committed = -1; |
257c62e1 | 1477 | root->last_log_commit = 0; |
e02119d5 CM |
1478 | return 0; |
1479 | } | |
1480 | ||
35a3621b SB |
1481 | static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
1482 | struct btrfs_key *key) | |
e02119d5 CM |
1483 | { |
1484 | struct btrfs_root *root; | |
1485 | struct btrfs_fs_info *fs_info = tree_root->fs_info; | |
0f7d52f4 | 1486 | struct btrfs_path *path; |
84234f3a | 1487 | u64 generation; |
db94535d | 1488 | u32 blocksize; |
cb517eab | 1489 | int ret; |
0f7d52f4 | 1490 | |
cb517eab MX |
1491 | path = btrfs_alloc_path(); |
1492 | if (!path) | |
0f7d52f4 | 1493 | return ERR_PTR(-ENOMEM); |
cb517eab MX |
1494 | |
1495 | root = btrfs_alloc_root(fs_info); | |
1496 | if (!root) { | |
1497 | ret = -ENOMEM; | |
1498 | goto alloc_fail; | |
0f7d52f4 CM |
1499 | } |
1500 | ||
db94535d | 1501 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
87ee04eb | 1502 | tree_root->sectorsize, tree_root->stripesize, |
cb517eab | 1503 | root, fs_info, key->objectid); |
0f7d52f4 | 1504 | |
cb517eab MX |
1505 | ret = btrfs_find_root(tree_root, key, path, |
1506 | &root->root_item, &root->root_key); | |
0f7d52f4 | 1507 | if (ret) { |
13a8a7c8 YZ |
1508 | if (ret > 0) |
1509 | ret = -ENOENT; | |
cb517eab | 1510 | goto find_fail; |
0f7d52f4 | 1511 | } |
13a8a7c8 | 1512 | |
84234f3a | 1513 | generation = btrfs_root_generation(&root->root_item); |
db94535d CM |
1514 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
1515 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), | |
84234f3a | 1516 | blocksize, generation); |
cb517eab MX |
1517 | if (!root->node) { |
1518 | ret = -ENOMEM; | |
1519 | goto find_fail; | |
1520 | } else if (!btrfs_buffer_uptodate(root->node, generation, 0)) { | |
1521 | ret = -EIO; | |
1522 | goto read_fail; | |
416bc658 | 1523 | } |
5d4f98a2 | 1524 | root->commit_root = btrfs_root_node(root); |
13a8a7c8 | 1525 | out: |
cb517eab MX |
1526 | btrfs_free_path(path); |
1527 | return root; | |
1528 | ||
1529 | read_fail: | |
1530 | free_extent_buffer(root->node); | |
1531 | find_fail: | |
1532 | kfree(root); | |
1533 | alloc_fail: | |
1534 | root = ERR_PTR(ret); | |
1535 | goto out; | |
1536 | } | |
1537 | ||
1538 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root, | |
1539 | struct btrfs_key *location) | |
1540 | { | |
1541 | struct btrfs_root *root; | |
1542 | ||
1543 | root = btrfs_read_tree_root(tree_root, location); | |
1544 | if (IS_ERR(root)) | |
1545 | return root; | |
1546 | ||
1547 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { | |
27cdeb70 | 1548 | set_bit(BTRFS_ROOT_REF_COWS, &root->state); |
08fe4db1 LZ |
1549 | btrfs_check_and_init_root_item(&root->root_item); |
1550 | } | |
13a8a7c8 | 1551 | |
5eda7b5e CM |
1552 | return root; |
1553 | } | |
1554 | ||
cb517eab MX |
1555 | int btrfs_init_fs_root(struct btrfs_root *root) |
1556 | { | |
1557 | int ret; | |
8257b2dc | 1558 | struct btrfs_subvolume_writers *writers; |
cb517eab MX |
1559 | |
1560 | root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); | |
1561 | root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), | |
1562 | GFP_NOFS); | |
1563 | if (!root->free_ino_pinned || !root->free_ino_ctl) { | |
1564 | ret = -ENOMEM; | |
1565 | goto fail; | |
1566 | } | |
1567 | ||
8257b2dc MX |
1568 | writers = btrfs_alloc_subvolume_writers(); |
1569 | if (IS_ERR(writers)) { | |
1570 | ret = PTR_ERR(writers); | |
1571 | goto fail; | |
1572 | } | |
1573 | root->subv_writers = writers; | |
1574 | ||
cb517eab | 1575 | btrfs_init_free_ino_ctl(root); |
57cdc8db DS |
1576 | spin_lock_init(&root->ino_cache_lock); |
1577 | init_waitqueue_head(&root->ino_cache_wait); | |
cb517eab MX |
1578 | |
1579 | ret = get_anon_bdev(&root->anon_dev); | |
1580 | if (ret) | |
8257b2dc | 1581 | goto free_writers; |
cb517eab | 1582 | return 0; |
8257b2dc MX |
1583 | |
1584 | free_writers: | |
1585 | btrfs_free_subvolume_writers(root->subv_writers); | |
cb517eab MX |
1586 | fail: |
1587 | kfree(root->free_ino_ctl); | |
1588 | kfree(root->free_ino_pinned); | |
1589 | return ret; | |
1590 | } | |
1591 | ||
171170c1 ST |
1592 | static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
1593 | u64 root_id) | |
cb517eab MX |
1594 | { |
1595 | struct btrfs_root *root; | |
1596 | ||
1597 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1598 | root = radix_tree_lookup(&fs_info->fs_roots_radix, | |
1599 | (unsigned long)root_id); | |
1600 | spin_unlock(&fs_info->fs_roots_radix_lock); | |
1601 | return root; | |
1602 | } | |
1603 | ||
1604 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, | |
1605 | struct btrfs_root *root) | |
1606 | { | |
1607 | int ret; | |
1608 | ||
1609 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); | |
1610 | if (ret) | |
1611 | return ret; | |
1612 | ||
1613 | spin_lock(&fs_info->fs_roots_radix_lock); | |
1614 | ret = radix_tree_insert(&fs_info->fs_roots_radix, | |
1615 | (unsigned long)root->root_key.objectid, | |
1616 | root); | |
1617 | if (ret == 0) | |
27cdeb70 | 1618 | set_bit(BTRFS_ROOT_IN_RADIX, &root->state); |
cb517eab MX |
1619 | spin_unlock(&fs_info->fs_roots_radix_lock); |
1620 | radix_tree_preload_end(); | |
1621 | ||
1622 | return ret; | |
1623 | } | |
1624 | ||
c00869f1 MX |
1625 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
1626 | struct btrfs_key *location, | |
1627 | bool check_ref) | |
5eda7b5e CM |
1628 | { |
1629 | struct btrfs_root *root; | |
1630 | int ret; | |
1631 | ||
edbd8d4e CM |
1632 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
1633 | return fs_info->tree_root; | |
1634 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) | |
1635 | return fs_info->extent_root; | |
8f18cf13 CM |
1636 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
1637 | return fs_info->chunk_root; | |
1638 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) | |
1639 | return fs_info->dev_root; | |
0403e47e YZ |
1640 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
1641 | return fs_info->csum_root; | |
bcef60f2 AJ |
1642 | if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) |
1643 | return fs_info->quota_root ? fs_info->quota_root : | |
1644 | ERR_PTR(-ENOENT); | |
f7a81ea4 SB |
1645 | if (location->objectid == BTRFS_UUID_TREE_OBJECTID) |
1646 | return fs_info->uuid_root ? fs_info->uuid_root : | |
1647 | ERR_PTR(-ENOENT); | |
4df27c4d | 1648 | again: |
cb517eab | 1649 | root = btrfs_lookup_fs_root(fs_info, location->objectid); |
48475471 | 1650 | if (root) { |
c00869f1 | 1651 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) |
48475471 | 1652 | return ERR_PTR(-ENOENT); |
5eda7b5e | 1653 | return root; |
48475471 | 1654 | } |
5eda7b5e | 1655 | |
cb517eab | 1656 | root = btrfs_read_fs_root(fs_info->tree_root, location); |
5eda7b5e CM |
1657 | if (IS_ERR(root)) |
1658 | return root; | |
3394e160 | 1659 | |
c00869f1 | 1660 | if (check_ref && btrfs_root_refs(&root->root_item) == 0) { |
cb517eab | 1661 | ret = -ENOENT; |
581bb050 | 1662 | goto fail; |
35a30d7c | 1663 | } |
581bb050 | 1664 | |
cb517eab | 1665 | ret = btrfs_init_fs_root(root); |
ac08aedf CM |
1666 | if (ret) |
1667 | goto fail; | |
3394e160 | 1668 | |
3f870c28 KN |
1669 | ret = btrfs_find_item(fs_info->tree_root, NULL, BTRFS_ORPHAN_OBJECTID, |
1670 | location->objectid, BTRFS_ORPHAN_ITEM_KEY, NULL); | |
d68fc57b YZ |
1671 | if (ret < 0) |
1672 | goto fail; | |
1673 | if (ret == 0) | |
27cdeb70 | 1674 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
d68fc57b | 1675 | |
cb517eab | 1676 | ret = btrfs_insert_fs_root(fs_info, root); |
0f7d52f4 | 1677 | if (ret) { |
4df27c4d YZ |
1678 | if (ret == -EEXIST) { |
1679 | free_fs_root(root); | |
1680 | goto again; | |
1681 | } | |
1682 | goto fail; | |
0f7d52f4 | 1683 | } |
edbd8d4e | 1684 | return root; |
4df27c4d YZ |
1685 | fail: |
1686 | free_fs_root(root); | |
1687 | return ERR_PTR(ret); | |
edbd8d4e CM |
1688 | } |
1689 | ||
04160088 CM |
1690 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
1691 | { | |
1692 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; | |
1693 | int ret = 0; | |
04160088 CM |
1694 | struct btrfs_device *device; |
1695 | struct backing_dev_info *bdi; | |
b7967db7 | 1696 | |
1f78160c XG |
1697 | rcu_read_lock(); |
1698 | list_for_each_entry_rcu(device, &info->fs_devices->devices, dev_list) { | |
dfe25020 CM |
1699 | if (!device->bdev) |
1700 | continue; | |
04160088 CM |
1701 | bdi = blk_get_backing_dev_info(device->bdev); |
1702 | if (bdi && bdi_congested(bdi, bdi_bits)) { | |
1703 | ret = 1; | |
1704 | break; | |
1705 | } | |
1706 | } | |
1f78160c | 1707 | rcu_read_unlock(); |
04160088 CM |
1708 | return ret; |
1709 | } | |
1710 | ||
ad081f14 JA |
1711 | /* |
1712 | * If this fails, caller must call bdi_destroy() to get rid of the | |
1713 | * bdi again. | |
1714 | */ | |
04160088 CM |
1715 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
1716 | { | |
ad081f14 JA |
1717 | int err; |
1718 | ||
1719 | bdi->capabilities = BDI_CAP_MAP_COPY; | |
e6d086d8 | 1720 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
ad081f14 JA |
1721 | if (err) |
1722 | return err; | |
1723 | ||
4575c9cc | 1724 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
04160088 CM |
1725 | bdi->congested_fn = btrfs_congested_fn; |
1726 | bdi->congested_data = info; | |
1727 | return 0; | |
1728 | } | |
1729 | ||
8b712842 CM |
1730 | /* |
1731 | * called by the kthread helper functions to finally call the bio end_io | |
1732 | * functions. This is where read checksum verification actually happens | |
1733 | */ | |
1734 | static void end_workqueue_fn(struct btrfs_work *work) | |
ce9adaa5 | 1735 | { |
ce9adaa5 | 1736 | struct bio *bio; |
8b712842 | 1737 | struct end_io_wq *end_io_wq; |
ce9adaa5 | 1738 | int error; |
ce9adaa5 | 1739 | |
8b712842 CM |
1740 | end_io_wq = container_of(work, struct end_io_wq, work); |
1741 | bio = end_io_wq->bio; | |
ce9adaa5 | 1742 | |
8b712842 CM |
1743 | error = end_io_wq->error; |
1744 | bio->bi_private = end_io_wq->private; | |
1745 | bio->bi_end_io = end_io_wq->end_io; | |
1746 | kfree(end_io_wq); | |
bc1e79ac | 1747 | bio_endio_nodec(bio, error); |
44b8bd7e CM |
1748 | } |
1749 | ||
a74a4b97 CM |
1750 | static int cleaner_kthread(void *arg) |
1751 | { | |
1752 | struct btrfs_root *root = arg; | |
d0278245 | 1753 | int again; |
a74a4b97 CM |
1754 | |
1755 | do { | |
d0278245 | 1756 | again = 0; |
a74a4b97 | 1757 | |
d0278245 | 1758 | /* Make the cleaner go to sleep early. */ |
babbf170 | 1759 | if (btrfs_need_cleaner_sleep(root)) |
d0278245 MX |
1760 | goto sleep; |
1761 | ||
1762 | if (!mutex_trylock(&root->fs_info->cleaner_mutex)) | |
1763 | goto sleep; | |
1764 | ||
dc7f370c MX |
1765 | /* |
1766 | * Avoid the problem that we change the status of the fs | |
1767 | * during the above check and trylock. | |
1768 | */ | |
babbf170 | 1769 | if (btrfs_need_cleaner_sleep(root)) { |
dc7f370c MX |
1770 | mutex_unlock(&root->fs_info->cleaner_mutex); |
1771 | goto sleep; | |
76dda93c | 1772 | } |
a74a4b97 | 1773 | |
d0278245 MX |
1774 | btrfs_run_delayed_iputs(root); |
1775 | again = btrfs_clean_one_deleted_snapshot(root); | |
1776 | mutex_unlock(&root->fs_info->cleaner_mutex); | |
1777 | ||
1778 | /* | |
05323cd1 MX |
1779 | * The defragger has dealt with the R/O remount and umount, |
1780 | * needn't do anything special here. | |
d0278245 MX |
1781 | */ |
1782 | btrfs_run_defrag_inodes(root->fs_info); | |
1783 | sleep: | |
9d1a2a3a | 1784 | if (!try_to_freeze() && !again) { |
a74a4b97 | 1785 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa YZ |
1786 | if (!kthread_should_stop()) |
1787 | schedule(); | |
a74a4b97 CM |
1788 | __set_current_state(TASK_RUNNING); |
1789 | } | |
1790 | } while (!kthread_should_stop()); | |
1791 | return 0; | |
1792 | } | |
1793 | ||
1794 | static int transaction_kthread(void *arg) | |
1795 | { | |
1796 | struct btrfs_root *root = arg; | |
1797 | struct btrfs_trans_handle *trans; | |
1798 | struct btrfs_transaction *cur; | |
8929ecfa | 1799 | u64 transid; |
a74a4b97 CM |
1800 | unsigned long now; |
1801 | unsigned long delay; | |
914b2007 | 1802 | bool cannot_commit; |
a74a4b97 CM |
1803 | |
1804 | do { | |
914b2007 | 1805 | cannot_commit = false; |
8b87dc17 | 1806 | delay = HZ * root->fs_info->commit_interval; |
a74a4b97 CM |
1807 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
1808 | ||
a4abeea4 | 1809 | spin_lock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1810 | cur = root->fs_info->running_transaction; |
1811 | if (!cur) { | |
a4abeea4 | 1812 | spin_unlock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1813 | goto sleep; |
1814 | } | |
31153d81 | 1815 | |
a74a4b97 | 1816 | now = get_seconds(); |
4a9d8bde | 1817 | if (cur->state < TRANS_STATE_BLOCKED && |
8b87dc17 DS |
1818 | (now < cur->start_time || |
1819 | now - cur->start_time < root->fs_info->commit_interval)) { | |
a4abeea4 | 1820 | spin_unlock(&root->fs_info->trans_lock); |
a74a4b97 CM |
1821 | delay = HZ * 5; |
1822 | goto sleep; | |
1823 | } | |
8929ecfa | 1824 | transid = cur->transid; |
a4abeea4 | 1825 | spin_unlock(&root->fs_info->trans_lock); |
56bec294 | 1826 | |
79787eaa | 1827 | /* If the file system is aborted, this will always fail. */ |
354aa0fb | 1828 | trans = btrfs_attach_transaction(root); |
914b2007 | 1829 | if (IS_ERR(trans)) { |
354aa0fb MX |
1830 | if (PTR_ERR(trans) != -ENOENT) |
1831 | cannot_commit = true; | |
79787eaa | 1832 | goto sleep; |
914b2007 | 1833 | } |
8929ecfa | 1834 | if (transid == trans->transid) { |
79787eaa | 1835 | btrfs_commit_transaction(trans, root); |
8929ecfa YZ |
1836 | } else { |
1837 | btrfs_end_transaction(trans, root); | |
1838 | } | |
a74a4b97 CM |
1839 | sleep: |
1840 | wake_up_process(root->fs_info->cleaner_kthread); | |
1841 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); | |
1842 | ||
4e121c06 JB |
1843 | if (unlikely(test_bit(BTRFS_FS_STATE_ERROR, |
1844 | &root->fs_info->fs_state))) | |
1845 | btrfs_cleanup_transaction(root); | |
a0acae0e | 1846 | if (!try_to_freeze()) { |
a74a4b97 | 1847 | set_current_state(TASK_INTERRUPTIBLE); |
8929ecfa | 1848 | if (!kthread_should_stop() && |
914b2007 JK |
1849 | (!btrfs_transaction_blocked(root->fs_info) || |
1850 | cannot_commit)) | |
8929ecfa | 1851 | schedule_timeout(delay); |
a74a4b97 CM |
1852 | __set_current_state(TASK_RUNNING); |
1853 | } | |
1854 | } while (!kthread_should_stop()); | |
1855 | return 0; | |
1856 | } | |
1857 | ||
af31f5e5 CM |
1858 | /* |
1859 | * this will find the highest generation in the array of | |
1860 | * root backups. The index of the highest array is returned, | |
1861 | * or -1 if we can't find anything. | |
1862 | * | |
1863 | * We check to make sure the array is valid by comparing the | |
1864 | * generation of the latest root in the array with the generation | |
1865 | * in the super block. If they don't match we pitch it. | |
1866 | */ | |
1867 | static int find_newest_super_backup(struct btrfs_fs_info *info, u64 newest_gen) | |
1868 | { | |
1869 | u64 cur; | |
1870 | int newest_index = -1; | |
1871 | struct btrfs_root_backup *root_backup; | |
1872 | int i; | |
1873 | ||
1874 | for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { | |
1875 | root_backup = info->super_copy->super_roots + i; | |
1876 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1877 | if (cur == newest_gen) | |
1878 | newest_index = i; | |
1879 | } | |
1880 | ||
1881 | /* check to see if we actually wrapped around */ | |
1882 | if (newest_index == BTRFS_NUM_BACKUP_ROOTS - 1) { | |
1883 | root_backup = info->super_copy->super_roots; | |
1884 | cur = btrfs_backup_tree_root_gen(root_backup); | |
1885 | if (cur == newest_gen) | |
1886 | newest_index = 0; | |
1887 | } | |
1888 | return newest_index; | |
1889 | } | |
1890 | ||
1891 | ||
1892 | /* | |
1893 | * find the oldest backup so we know where to store new entries | |
1894 | * in the backup array. This will set the backup_root_index | |
1895 | * field in the fs_info struct | |
1896 | */ | |
1897 | static void find_oldest_super_backup(struct btrfs_fs_info *info, | |
1898 | u64 newest_gen) | |
1899 | { | |
1900 | int newest_index = -1; | |
1901 | ||
1902 | newest_index = find_newest_super_backup(info, newest_gen); | |
1903 | /* if there was garbage in there, just move along */ | |
1904 | if (newest_index == -1) { | |
1905 | info->backup_root_index = 0; | |
1906 | } else { | |
1907 | info->backup_root_index = (newest_index + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | /* | |
1912 | * copy all the root pointers into the super backup array. | |
1913 | * this will bump the backup pointer by one when it is | |
1914 | * done | |
1915 | */ | |
1916 | static void backup_super_roots(struct btrfs_fs_info *info) | |
1917 | { | |
1918 | int next_backup; | |
1919 | struct btrfs_root_backup *root_backup; | |
1920 | int last_backup; | |
1921 | ||
1922 | next_backup = info->backup_root_index; | |
1923 | last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
1924 | BTRFS_NUM_BACKUP_ROOTS; | |
1925 | ||
1926 | /* | |
1927 | * just overwrite the last backup if we're at the same generation | |
1928 | * this happens only at umount | |
1929 | */ | |
1930 | root_backup = info->super_for_commit->super_roots + last_backup; | |
1931 | if (btrfs_backup_tree_root_gen(root_backup) == | |
1932 | btrfs_header_generation(info->tree_root->node)) | |
1933 | next_backup = last_backup; | |
1934 | ||
1935 | root_backup = info->super_for_commit->super_roots + next_backup; | |
1936 | ||
1937 | /* | |
1938 | * make sure all of our padding and empty slots get zero filled | |
1939 | * regardless of which ones we use today | |
1940 | */ | |
1941 | memset(root_backup, 0, sizeof(*root_backup)); | |
1942 | ||
1943 | info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS; | |
1944 | ||
1945 | btrfs_set_backup_tree_root(root_backup, info->tree_root->node->start); | |
1946 | btrfs_set_backup_tree_root_gen(root_backup, | |
1947 | btrfs_header_generation(info->tree_root->node)); | |
1948 | ||
1949 | btrfs_set_backup_tree_root_level(root_backup, | |
1950 | btrfs_header_level(info->tree_root->node)); | |
1951 | ||
1952 | btrfs_set_backup_chunk_root(root_backup, info->chunk_root->node->start); | |
1953 | btrfs_set_backup_chunk_root_gen(root_backup, | |
1954 | btrfs_header_generation(info->chunk_root->node)); | |
1955 | btrfs_set_backup_chunk_root_level(root_backup, | |
1956 | btrfs_header_level(info->chunk_root->node)); | |
1957 | ||
1958 | btrfs_set_backup_extent_root(root_backup, info->extent_root->node->start); | |
1959 | btrfs_set_backup_extent_root_gen(root_backup, | |
1960 | btrfs_header_generation(info->extent_root->node)); | |
1961 | btrfs_set_backup_extent_root_level(root_backup, | |
1962 | btrfs_header_level(info->extent_root->node)); | |
1963 | ||
7c7e82a7 CM |
1964 | /* |
1965 | * we might commit during log recovery, which happens before we set | |
1966 | * the fs_root. Make sure it is valid before we fill it in. | |
1967 | */ | |
1968 | if (info->fs_root && info->fs_root->node) { | |
1969 | btrfs_set_backup_fs_root(root_backup, | |
1970 | info->fs_root->node->start); | |
1971 | btrfs_set_backup_fs_root_gen(root_backup, | |
af31f5e5 | 1972 | btrfs_header_generation(info->fs_root->node)); |
7c7e82a7 | 1973 | btrfs_set_backup_fs_root_level(root_backup, |
af31f5e5 | 1974 | btrfs_header_level(info->fs_root->node)); |
7c7e82a7 | 1975 | } |
af31f5e5 CM |
1976 | |
1977 | btrfs_set_backup_dev_root(root_backup, info->dev_root->node->start); | |
1978 | btrfs_set_backup_dev_root_gen(root_backup, | |
1979 | btrfs_header_generation(info->dev_root->node)); | |
1980 | btrfs_set_backup_dev_root_level(root_backup, | |
1981 | btrfs_header_level(info->dev_root->node)); | |
1982 | ||
1983 | btrfs_set_backup_csum_root(root_backup, info->csum_root->node->start); | |
1984 | btrfs_set_backup_csum_root_gen(root_backup, | |
1985 | btrfs_header_generation(info->csum_root->node)); | |
1986 | btrfs_set_backup_csum_root_level(root_backup, | |
1987 | btrfs_header_level(info->csum_root->node)); | |
1988 | ||
1989 | btrfs_set_backup_total_bytes(root_backup, | |
1990 | btrfs_super_total_bytes(info->super_copy)); | |
1991 | btrfs_set_backup_bytes_used(root_backup, | |
1992 | btrfs_super_bytes_used(info->super_copy)); | |
1993 | btrfs_set_backup_num_devices(root_backup, | |
1994 | btrfs_super_num_devices(info->super_copy)); | |
1995 | ||
1996 | /* | |
1997 | * if we don't copy this out to the super_copy, it won't get remembered | |
1998 | * for the next commit | |
1999 | */ | |
2000 | memcpy(&info->super_copy->super_roots, | |
2001 | &info->super_for_commit->super_roots, | |
2002 | sizeof(*root_backup) * BTRFS_NUM_BACKUP_ROOTS); | |
2003 | } | |
2004 | ||
2005 | /* | |
2006 | * this copies info out of the root backup array and back into | |
2007 | * the in-memory super block. It is meant to help iterate through | |
2008 | * the array, so you send it the number of backups you've already | |
2009 | * tried and the last backup index you used. | |
2010 | * | |
2011 | * this returns -1 when it has tried all the backups | |
2012 | */ | |
2013 | static noinline int next_root_backup(struct btrfs_fs_info *info, | |
2014 | struct btrfs_super_block *super, | |
2015 | int *num_backups_tried, int *backup_index) | |
2016 | { | |
2017 | struct btrfs_root_backup *root_backup; | |
2018 | int newest = *backup_index; | |
2019 | ||
2020 | if (*num_backups_tried == 0) { | |
2021 | u64 gen = btrfs_super_generation(super); | |
2022 | ||
2023 | newest = find_newest_super_backup(info, gen); | |
2024 | if (newest == -1) | |
2025 | return -1; | |
2026 | ||
2027 | *backup_index = newest; | |
2028 | *num_backups_tried = 1; | |
2029 | } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) { | |
2030 | /* we've tried all the backups, all done */ | |
2031 | return -1; | |
2032 | } else { | |
2033 | /* jump to the next oldest backup */ | |
2034 | newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) % | |
2035 | BTRFS_NUM_BACKUP_ROOTS; | |
2036 | *backup_index = newest; | |
2037 | *num_backups_tried += 1; | |
2038 | } | |
2039 | root_backup = super->super_roots + newest; | |
2040 | ||
2041 | btrfs_set_super_generation(super, | |
2042 | btrfs_backup_tree_root_gen(root_backup)); | |
2043 | btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup)); | |
2044 | btrfs_set_super_root_level(super, | |
2045 | btrfs_backup_tree_root_level(root_backup)); | |
2046 | btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup)); | |
2047 | ||
2048 | /* | |
2049 | * fixme: the total bytes and num_devices need to match or we should | |
2050 | * need a fsck | |
2051 | */ | |
2052 | btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup)); | |
2053 | btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup)); | |
2054 | return 0; | |
2055 | } | |
2056 | ||
7abadb64 LB |
2057 | /* helper to cleanup workers */ |
2058 | static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) | |
2059 | { | |
dc6e3209 | 2060 | btrfs_destroy_workqueue(fs_info->fixup_workers); |
afe3d242 | 2061 | btrfs_destroy_workqueue(fs_info->delalloc_workers); |
5cdc7ad3 | 2062 | btrfs_destroy_workqueue(fs_info->workers); |
fccb5d86 QW |
2063 | btrfs_destroy_workqueue(fs_info->endio_workers); |
2064 | btrfs_destroy_workqueue(fs_info->endio_meta_workers); | |
2065 | btrfs_destroy_workqueue(fs_info->endio_raid56_workers); | |
d05a33ac | 2066 | btrfs_destroy_workqueue(fs_info->rmw_workers); |
fccb5d86 QW |
2067 | btrfs_destroy_workqueue(fs_info->endio_meta_write_workers); |
2068 | btrfs_destroy_workqueue(fs_info->endio_write_workers); | |
2069 | btrfs_destroy_workqueue(fs_info->endio_freespace_worker); | |
a8c93d4e | 2070 | btrfs_destroy_workqueue(fs_info->submit_workers); |
5b3bc44e | 2071 | btrfs_destroy_workqueue(fs_info->delayed_workers); |
e66f0bb1 | 2072 | btrfs_destroy_workqueue(fs_info->caching_workers); |
736cfa15 | 2073 | btrfs_destroy_workqueue(fs_info->readahead_workers); |
a44903ab | 2074 | btrfs_destroy_workqueue(fs_info->flush_workers); |
fc97fab0 | 2075 | btrfs_destroy_workqueue(fs_info->qgroup_rescan_workers); |
a79b7d4b | 2076 | btrfs_destroy_workqueue(fs_info->extent_workers); |
7abadb64 LB |
2077 | } |
2078 | ||
2e9f5954 R |
2079 | static void free_root_extent_buffers(struct btrfs_root *root) |
2080 | { | |
2081 | if (root) { | |
2082 | free_extent_buffer(root->node); | |
2083 | free_extent_buffer(root->commit_root); | |
2084 | root->node = NULL; | |
2085 | root->commit_root = NULL; | |
2086 | } | |
2087 | } | |
2088 | ||
af31f5e5 CM |
2089 | /* helper to cleanup tree roots */ |
2090 | static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root) | |
2091 | { | |
2e9f5954 | 2092 | free_root_extent_buffers(info->tree_root); |
655b09fe | 2093 | |
2e9f5954 R |
2094 | free_root_extent_buffers(info->dev_root); |
2095 | free_root_extent_buffers(info->extent_root); | |
2096 | free_root_extent_buffers(info->csum_root); | |
2097 | free_root_extent_buffers(info->quota_root); | |
2098 | free_root_extent_buffers(info->uuid_root); | |
2099 | if (chunk_root) | |
2100 | free_root_extent_buffers(info->chunk_root); | |
af31f5e5 CM |
2101 | } |
2102 | ||
faa2dbf0 | 2103 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info) |
171f6537 JB |
2104 | { |
2105 | int ret; | |
2106 | struct btrfs_root *gang[8]; | |
2107 | int i; | |
2108 | ||
2109 | while (!list_empty(&fs_info->dead_roots)) { | |
2110 | gang[0] = list_entry(fs_info->dead_roots.next, | |
2111 | struct btrfs_root, root_list); | |
2112 | list_del(&gang[0]->root_list); | |
2113 | ||
27cdeb70 | 2114 | if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) { |
cb517eab | 2115 | btrfs_drop_and_free_fs_root(fs_info, gang[0]); |
171f6537 JB |
2116 | } else { |
2117 | free_extent_buffer(gang[0]->node); | |
2118 | free_extent_buffer(gang[0]->commit_root); | |
b0feb9d9 | 2119 | btrfs_put_fs_root(gang[0]); |
171f6537 JB |
2120 | } |
2121 | } | |
2122 | ||
2123 | while (1) { | |
2124 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, | |
2125 | (void **)gang, 0, | |
2126 | ARRAY_SIZE(gang)); | |
2127 | if (!ret) | |
2128 | break; | |
2129 | for (i = 0; i < ret; i++) | |
cb517eab | 2130 | btrfs_drop_and_free_fs_root(fs_info, gang[i]); |
171f6537 | 2131 | } |
1a4319cc LB |
2132 | |
2133 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) { | |
2134 | btrfs_free_log_root_tree(NULL, fs_info); | |
2135 | btrfs_destroy_pinned_extent(fs_info->tree_root, | |
2136 | fs_info->pinned_extents); | |
2137 | } | |
171f6537 | 2138 | } |
af31f5e5 | 2139 | |
ad2b2c80 AV |
2140 | int open_ctree(struct super_block *sb, |
2141 | struct btrfs_fs_devices *fs_devices, | |
2142 | char *options) | |
2e635a27 | 2143 | { |
db94535d CM |
2144 | u32 sectorsize; |
2145 | u32 nodesize; | |
2146 | u32 leafsize; | |
2147 | u32 blocksize; | |
87ee04eb | 2148 | u32 stripesize; |
84234f3a | 2149 | u64 generation; |
f2b636e8 | 2150 | u64 features; |
3de4586c | 2151 | struct btrfs_key location; |
a061fc8d | 2152 | struct buffer_head *bh; |
4d34b278 | 2153 | struct btrfs_super_block *disk_super; |
815745cf | 2154 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
f84a8bd6 | 2155 | struct btrfs_root *tree_root; |
4d34b278 ID |
2156 | struct btrfs_root *extent_root; |
2157 | struct btrfs_root *csum_root; | |
2158 | struct btrfs_root *chunk_root; | |
2159 | struct btrfs_root *dev_root; | |
bcef60f2 | 2160 | struct btrfs_root *quota_root; |
f7a81ea4 | 2161 | struct btrfs_root *uuid_root; |
e02119d5 | 2162 | struct btrfs_root *log_tree_root; |
eb60ceac | 2163 | int ret; |
e58ca020 | 2164 | int err = -EINVAL; |
af31f5e5 CM |
2165 | int num_backups_tried = 0; |
2166 | int backup_index = 0; | |
5cdc7ad3 QW |
2167 | int max_active; |
2168 | int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND; | |
70f80175 SB |
2169 | bool create_uuid_tree; |
2170 | bool check_uuid_tree; | |
4543df7e | 2171 | |
f84a8bd6 | 2172 | tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info); |
6f07e42e | 2173 | chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info); |
cb517eab | 2174 | if (!tree_root || !chunk_root) { |
39279cc3 CM |
2175 | err = -ENOMEM; |
2176 | goto fail; | |
2177 | } | |
76dda93c YZ |
2178 | |
2179 | ret = init_srcu_struct(&fs_info->subvol_srcu); | |
2180 | if (ret) { | |
2181 | err = ret; | |
2182 | goto fail; | |
2183 | } | |
2184 | ||
2185 | ret = setup_bdi(fs_info, &fs_info->bdi); | |
2186 | if (ret) { | |
2187 | err = ret; | |
2188 | goto fail_srcu; | |
2189 | } | |
2190 | ||
e2d84521 MX |
2191 | ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0); |
2192 | if (ret) { | |
2193 | err = ret; | |
2194 | goto fail_bdi; | |
2195 | } | |
2196 | fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE * | |
2197 | (1 + ilog2(nr_cpu_ids)); | |
2198 | ||
963d678b MX |
2199 | ret = percpu_counter_init(&fs_info->delalloc_bytes, 0); |
2200 | if (ret) { | |
2201 | err = ret; | |
2202 | goto fail_dirty_metadata_bytes; | |
2203 | } | |
2204 | ||
c404e0dc MX |
2205 | ret = percpu_counter_init(&fs_info->bio_counter, 0); |
2206 | if (ret) { | |
2207 | err = ret; | |
2208 | goto fail_delalloc_bytes; | |
2209 | } | |
2210 | ||
76dda93c YZ |
2211 | fs_info->btree_inode = new_inode(sb); |
2212 | if (!fs_info->btree_inode) { | |
2213 | err = -ENOMEM; | |
c404e0dc | 2214 | goto fail_bio_counter; |
76dda93c YZ |
2215 | } |
2216 | ||
a6591715 | 2217 | mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); |
1561deda | 2218 | |
76dda93c | 2219 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
f28491e0 | 2220 | INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); |
8fd17795 | 2221 | INIT_LIST_HEAD(&fs_info->trans_list); |
facda1e7 | 2222 | INIT_LIST_HEAD(&fs_info->dead_roots); |
24bbcf04 | 2223 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
eb73c1b7 | 2224 | INIT_LIST_HEAD(&fs_info->delalloc_roots); |
11833d66 | 2225 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
eb73c1b7 | 2226 | spin_lock_init(&fs_info->delalloc_root_lock); |
a4abeea4 | 2227 | spin_lock_init(&fs_info->trans_lock); |
76dda93c | 2228 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
24bbcf04 | 2229 | spin_lock_init(&fs_info->delayed_iput_lock); |
4cb5300b | 2230 | spin_lock_init(&fs_info->defrag_inodes_lock); |
2bf64758 | 2231 | spin_lock_init(&fs_info->free_chunk_lock); |
f29021b2 | 2232 | spin_lock_init(&fs_info->tree_mod_seq_lock); |
ceda0864 | 2233 | spin_lock_init(&fs_info->super_lock); |
fcebe456 | 2234 | spin_lock_init(&fs_info->qgroup_op_lock); |
f28491e0 | 2235 | spin_lock_init(&fs_info->buffer_lock); |
f29021b2 | 2236 | rwlock_init(&fs_info->tree_mod_log_lock); |
7585717f | 2237 | mutex_init(&fs_info->reloc_mutex); |
573bfb72 | 2238 | mutex_init(&fs_info->delalloc_root_mutex); |
de98ced9 | 2239 | seqlock_init(&fs_info->profiles_lock); |
19c00ddc | 2240 | |
58176a96 | 2241 | init_completion(&fs_info->kobj_unregister); |
0b86a832 | 2242 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
6324fbf3 | 2243 | INIT_LIST_HEAD(&fs_info->space_info); |
f29021b2 | 2244 | INIT_LIST_HEAD(&fs_info->tree_mod_seq_list); |
0b86a832 | 2245 | btrfs_mapping_init(&fs_info->mapping_tree); |
66d8f3dd MX |
2246 | btrfs_init_block_rsv(&fs_info->global_block_rsv, |
2247 | BTRFS_BLOCK_RSV_GLOBAL); | |
2248 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv, | |
2249 | BTRFS_BLOCK_RSV_DELALLOC); | |
2250 | btrfs_init_block_rsv(&fs_info->trans_block_rsv, BTRFS_BLOCK_RSV_TRANS); | |
2251 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv, BTRFS_BLOCK_RSV_CHUNK); | |
2252 | btrfs_init_block_rsv(&fs_info->empty_block_rsv, BTRFS_BLOCK_RSV_EMPTY); | |
2253 | btrfs_init_block_rsv(&fs_info->delayed_block_rsv, | |
2254 | BTRFS_BLOCK_RSV_DELOPS); | |
cb03c743 | 2255 | atomic_set(&fs_info->nr_async_submits, 0); |
771ed689 | 2256 | atomic_set(&fs_info->async_delalloc_pages, 0); |
8c8bee1d | 2257 | atomic_set(&fs_info->async_submit_draining, 0); |
0986fe9e | 2258 | atomic_set(&fs_info->nr_async_bios, 0); |
4cb5300b | 2259 | atomic_set(&fs_info->defrag_running, 0); |
fcebe456 | 2260 | atomic_set(&fs_info->qgroup_op_seq, 0); |
fc36ed7e | 2261 | atomic64_set(&fs_info->tree_mod_seq, 0); |
e20d96d6 | 2262 | fs_info->sb = sb; |
6f568d35 | 2263 | fs_info->max_inline = 8192 * 1024; |
9ed74f2d | 2264 | fs_info->metadata_ratio = 0; |
4cb5300b | 2265 | fs_info->defrag_inodes = RB_ROOT; |
2bf64758 | 2266 | fs_info->free_chunk_space = 0; |
f29021b2 | 2267 | fs_info->tree_mod_log = RB_ROOT; |
8b87dc17 | 2268 | fs_info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL; |
0a2b2a84 | 2269 | fs_info->avg_delayed_ref_runtime = div64_u64(NSEC_PER_SEC, 64); |
90519d66 AJ |
2270 | /* readahead state */ |
2271 | INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); | |
2272 | spin_lock_init(&fs_info->reada_lock); | |
c8b97818 | 2273 | |
b34b086c CM |
2274 | fs_info->thread_pool_size = min_t(unsigned long, |
2275 | num_online_cpus() + 2, 8); | |
0afbaf8c | 2276 | |
199c2a9c MX |
2277 | INIT_LIST_HEAD(&fs_info->ordered_roots); |
2278 | spin_lock_init(&fs_info->ordered_root_lock); | |
16cdcec7 MX |
2279 | fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root), |
2280 | GFP_NOFS); | |
2281 | if (!fs_info->delayed_root) { | |
2282 | err = -ENOMEM; | |
2283 | goto fail_iput; | |
2284 | } | |
2285 | btrfs_init_delayed_root(fs_info->delayed_root); | |
3eaa2885 | 2286 | |
a2de733c AJ |
2287 | mutex_init(&fs_info->scrub_lock); |
2288 | atomic_set(&fs_info->scrubs_running, 0); | |
2289 | atomic_set(&fs_info->scrub_pause_req, 0); | |
2290 | atomic_set(&fs_info->scrubs_paused, 0); | |
2291 | atomic_set(&fs_info->scrub_cancel_req, 0); | |
c404e0dc | 2292 | init_waitqueue_head(&fs_info->replace_wait); |
a2de733c | 2293 | init_waitqueue_head(&fs_info->scrub_pause_wait); |
a2de733c | 2294 | fs_info->scrub_workers_refcnt = 0; |
21adbd5c SB |
2295 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2296 | fs_info->check_integrity_print_mask = 0; | |
2297 | #endif | |
a2de733c | 2298 | |
c9e9f97b ID |
2299 | spin_lock_init(&fs_info->balance_lock); |
2300 | mutex_init(&fs_info->balance_mutex); | |
837d5b6e ID |
2301 | atomic_set(&fs_info->balance_running, 0); |
2302 | atomic_set(&fs_info->balance_pause_req, 0); | |
a7e99c69 | 2303 | atomic_set(&fs_info->balance_cancel_req, 0); |
c9e9f97b | 2304 | fs_info->balance_ctl = NULL; |
837d5b6e | 2305 | init_waitqueue_head(&fs_info->balance_wait_q); |
21c7e756 | 2306 | btrfs_init_async_reclaim_work(&fs_info->async_reclaim_work); |
a2de733c | 2307 | |
a061fc8d CM |
2308 | sb->s_blocksize = 4096; |
2309 | sb->s_blocksize_bits = blksize_bits(4096); | |
32a88aa1 | 2310 | sb->s_bdi = &fs_info->bdi; |
a061fc8d | 2311 | |
76dda93c | 2312 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
bfe86848 | 2313 | set_nlink(fs_info->btree_inode, 1); |
0afbaf8c CM |
2314 | /* |
2315 | * we set the i_size on the btree inode to the max possible int. | |
2316 | * the real end of the address space is determined by all of | |
2317 | * the devices in the system | |
2318 | */ | |
2319 | fs_info->btree_inode->i_size = OFFSET_MAX; | |
d98237b3 | 2320 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
04160088 CM |
2321 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
2322 | ||
5d4f98a2 | 2323 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
d1310b2e | 2324 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
f993c883 | 2325 | fs_info->btree_inode->i_mapping); |
0b32f4bb | 2326 | BTRFS_I(fs_info->btree_inode)->io_tree.track_uptodate = 0; |
a8067e02 | 2327 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree); |
d1310b2e CM |
2328 | |
2329 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; | |
0da5468f | 2330 | |
76dda93c YZ |
2331 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
2332 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, | |
2333 | sizeof(struct btrfs_key)); | |
72ac3c0d JB |
2334 | set_bit(BTRFS_INODE_DUMMY, |
2335 | &BTRFS_I(fs_info->btree_inode)->runtime_flags); | |
778ba82b | 2336 | btrfs_insert_inode_hash(fs_info->btree_inode); |
76dda93c | 2337 | |
0f9dd46c | 2338 | spin_lock_init(&fs_info->block_group_cache_lock); |
6bef4d31 | 2339 | fs_info->block_group_cache_tree = RB_ROOT; |
a1897fdd | 2340 | fs_info->first_logical_byte = (u64)-1; |
0f9dd46c | 2341 | |
11833d66 | 2342 | extent_io_tree_init(&fs_info->freed_extents[0], |
f993c883 | 2343 | fs_info->btree_inode->i_mapping); |
11833d66 | 2344 | extent_io_tree_init(&fs_info->freed_extents[1], |
f993c883 | 2345 | fs_info->btree_inode->i_mapping); |
11833d66 | 2346 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
e66f709b | 2347 | fs_info->do_barriers = 1; |
e18e4809 | 2348 | |
39279cc3 | 2349 | |
5a3f23d5 | 2350 | mutex_init(&fs_info->ordered_operations_mutex); |
9ffba8cd | 2351 | mutex_init(&fs_info->ordered_extent_flush_mutex); |
e02119d5 | 2352 | mutex_init(&fs_info->tree_log_mutex); |
925baedd | 2353 | mutex_init(&fs_info->chunk_mutex); |
a74a4b97 CM |
2354 | mutex_init(&fs_info->transaction_kthread_mutex); |
2355 | mutex_init(&fs_info->cleaner_mutex); | |
7d9eb12c | 2356 | mutex_init(&fs_info->volume_mutex); |
9e351cc8 | 2357 | init_rwsem(&fs_info->commit_root_sem); |
c71bf099 | 2358 | init_rwsem(&fs_info->cleanup_work_sem); |
76dda93c | 2359 | init_rwsem(&fs_info->subvol_sem); |
803b2f54 | 2360 | sema_init(&fs_info->uuid_tree_rescan_sem, 1); |
e922e087 SB |
2361 | fs_info->dev_replace.lock_owner = 0; |
2362 | atomic_set(&fs_info->dev_replace.nesting_level, 0); | |
2363 | mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); | |
2364 | mutex_init(&fs_info->dev_replace.lock_management_lock); | |
2365 | mutex_init(&fs_info->dev_replace.lock); | |
fa9c0d79 | 2366 | |
416ac51d | 2367 | spin_lock_init(&fs_info->qgroup_lock); |
f2f6ed3d | 2368 | mutex_init(&fs_info->qgroup_ioctl_lock); |
416ac51d | 2369 | fs_info->qgroup_tree = RB_ROOT; |
fcebe456 | 2370 | fs_info->qgroup_op_tree = RB_ROOT; |
416ac51d AJ |
2371 | INIT_LIST_HEAD(&fs_info->dirty_qgroups); |
2372 | fs_info->qgroup_seq = 1; | |
2373 | fs_info->quota_enabled = 0; | |
2374 | fs_info->pending_quota_state = 0; | |
1e8f9158 | 2375 | fs_info->qgroup_ulist = NULL; |
2f232036 | 2376 | mutex_init(&fs_info->qgroup_rescan_lock); |
416ac51d | 2377 | |
fa9c0d79 CM |
2378 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
2379 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); | |
2380 | ||
e6dcd2dc | 2381 | init_waitqueue_head(&fs_info->transaction_throttle); |
f9295749 | 2382 | init_waitqueue_head(&fs_info->transaction_wait); |
bb9c12c9 | 2383 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
4854ddd0 | 2384 | init_waitqueue_head(&fs_info->async_submit_wait); |
3768f368 | 2385 | |
53b381b3 DW |
2386 | ret = btrfs_alloc_stripe_hash_table(fs_info); |
2387 | if (ret) { | |
83c8266a | 2388 | err = ret; |
53b381b3 DW |
2389 | goto fail_alloc; |
2390 | } | |
2391 | ||
0b86a832 | 2392 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
2c90e5d6 | 2393 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
7eccb903 | 2394 | |
3c4bb26b | 2395 | invalidate_bdev(fs_devices->latest_bdev); |
1104a885 DS |
2396 | |
2397 | /* | |
2398 | * Read super block and check the signature bytes only | |
2399 | */ | |
a512bbf8 | 2400 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
20b45077 DY |
2401 | if (!bh) { |
2402 | err = -EINVAL; | |
16cdcec7 | 2403 | goto fail_alloc; |
20b45077 | 2404 | } |
39279cc3 | 2405 | |
1104a885 DS |
2406 | /* |
2407 | * We want to check superblock checksum, the type is stored inside. | |
2408 | * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). | |
2409 | */ | |
2410 | if (btrfs_check_super_csum(bh->b_data)) { | |
efe120a0 | 2411 | printk(KERN_ERR "BTRFS: superblock checksum mismatch\n"); |
1104a885 DS |
2412 | err = -EINVAL; |
2413 | goto fail_alloc; | |
2414 | } | |
2415 | ||
2416 | /* | |
2417 | * super_copy is zeroed at allocation time and we never touch the | |
2418 | * following bytes up to INFO_SIZE, the checksum is calculated from | |
2419 | * the whole block of INFO_SIZE | |
2420 | */ | |
6c41761f DS |
2421 | memcpy(fs_info->super_copy, bh->b_data, sizeof(*fs_info->super_copy)); |
2422 | memcpy(fs_info->super_for_commit, fs_info->super_copy, | |
2423 | sizeof(*fs_info->super_for_commit)); | |
a061fc8d | 2424 | brelse(bh); |
5f39d397 | 2425 | |
6c41761f | 2426 | memcpy(fs_info->fsid, fs_info->super_copy->fsid, BTRFS_FSID_SIZE); |
0b86a832 | 2427 | |
1104a885 DS |
2428 | ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
2429 | if (ret) { | |
efe120a0 | 2430 | printk(KERN_ERR "BTRFS: superblock contains fatal errors\n"); |
1104a885 DS |
2431 | err = -EINVAL; |
2432 | goto fail_alloc; | |
2433 | } | |
2434 | ||
6c41761f | 2435 | disk_super = fs_info->super_copy; |
0f7d52f4 | 2436 | if (!btrfs_super_root(disk_super)) |
16cdcec7 | 2437 | goto fail_alloc; |
0f7d52f4 | 2438 | |
acce952b | 2439 | /* check FS state, whether FS is broken. */ |
87533c47 MX |
2440 | if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_ERROR) |
2441 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); | |
acce952b | 2442 | |
af31f5e5 CM |
2443 | /* |
2444 | * run through our array of backup supers and setup | |
2445 | * our ring pointer to the oldest one | |
2446 | */ | |
2447 | generation = btrfs_super_generation(disk_super); | |
2448 | find_oldest_super_backup(fs_info, generation); | |
2449 | ||
75e7cb7f LB |
2450 | /* |
2451 | * In the long term, we'll store the compression type in the super | |
2452 | * block, and it'll be used for per file compression control. | |
2453 | */ | |
2454 | fs_info->compress_type = BTRFS_COMPRESS_ZLIB; | |
2455 | ||
2b82032c YZ |
2456 | ret = btrfs_parse_options(tree_root, options); |
2457 | if (ret) { | |
2458 | err = ret; | |
16cdcec7 | 2459 | goto fail_alloc; |
2b82032c | 2460 | } |
dfe25020 | 2461 | |
f2b636e8 JB |
2462 | features = btrfs_super_incompat_flags(disk_super) & |
2463 | ~BTRFS_FEATURE_INCOMPAT_SUPP; | |
2464 | if (features) { | |
2465 | printk(KERN_ERR "BTRFS: couldn't mount because of " | |
2466 | "unsupported optional features (%Lx).\n", | |
c1c9ff7c | 2467 | features); |
f2b636e8 | 2468 | err = -EINVAL; |
16cdcec7 | 2469 | goto fail_alloc; |
f2b636e8 JB |
2470 | } |
2471 | ||
727011e0 CM |
2472 | if (btrfs_super_leafsize(disk_super) != |
2473 | btrfs_super_nodesize(disk_super)) { | |
2474 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " | |
2475 | "blocksizes don't match. node %d leaf %d\n", | |
2476 | btrfs_super_nodesize(disk_super), | |
2477 | btrfs_super_leafsize(disk_super)); | |
2478 | err = -EINVAL; | |
2479 | goto fail_alloc; | |
2480 | } | |
2481 | if (btrfs_super_leafsize(disk_super) > BTRFS_MAX_METADATA_BLOCKSIZE) { | |
2482 | printk(KERN_ERR "BTRFS: couldn't mount because metadata " | |
2483 | "blocksize (%d) was too large\n", | |
2484 | btrfs_super_leafsize(disk_super)); | |
2485 | err = -EINVAL; | |
2486 | goto fail_alloc; | |
2487 | } | |
2488 | ||
5d4f98a2 | 2489 | features = btrfs_super_incompat_flags(disk_super); |
a6fa6fae | 2490 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
69e380d1 | 2491 | if (tree_root->fs_info->compress_type == BTRFS_COMPRESS_LZO) |
a6fa6fae | 2492 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
727011e0 | 2493 | |
3173a18f | 2494 | if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
efe120a0 | 2495 | printk(KERN_ERR "BTRFS: has skinny extents\n"); |
3173a18f | 2496 | |
727011e0 CM |
2497 | /* |
2498 | * flag our filesystem as having big metadata blocks if | |
2499 | * they are bigger than the page size | |
2500 | */ | |
2501 | if (btrfs_super_leafsize(disk_super) > PAGE_CACHE_SIZE) { | |
2502 | if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA)) | |
efe120a0 | 2503 | printk(KERN_INFO "BTRFS: flagging fs with big metadata feature\n"); |
727011e0 CM |
2504 | features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA; |
2505 | } | |
2506 | ||
bc3f116f CM |
2507 | nodesize = btrfs_super_nodesize(disk_super); |
2508 | leafsize = btrfs_super_leafsize(disk_super); | |
2509 | sectorsize = btrfs_super_sectorsize(disk_super); | |
2510 | stripesize = btrfs_super_stripesize(disk_super); | |
e2d84521 | 2511 | fs_info->dirty_metadata_batch = leafsize * (1 + ilog2(nr_cpu_ids)); |
963d678b | 2512 | fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids)); |
bc3f116f CM |
2513 | |
2514 | /* | |
2515 | * mixed block groups end up with duplicate but slightly offset | |
2516 | * extent buffers for the same range. It leads to corruptions | |
2517 | */ | |
2518 | if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) && | |
2519 | (sectorsize != leafsize)) { | |
efe120a0 | 2520 | printk(KERN_WARNING "BTRFS: unequal leaf/node/sector sizes " |
bc3f116f CM |
2521 | "are not allowed for mixed block groups on %s\n", |
2522 | sb->s_id); | |
2523 | goto fail_alloc; | |
2524 | } | |
2525 | ||
ceda0864 MX |
2526 | /* |
2527 | * Needn't use the lock because there is no other task which will | |
2528 | * update the flag. | |
2529 | */ | |
a6fa6fae | 2530 | btrfs_set_super_incompat_flags(disk_super, features); |
5d4f98a2 | 2531 | |
f2b636e8 JB |
2532 | features = btrfs_super_compat_ro_flags(disk_super) & |
2533 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; | |
2534 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
2535 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " | |
2536 | "unsupported option features (%Lx).\n", | |
c1c9ff7c | 2537 | features); |
f2b636e8 | 2538 | err = -EINVAL; |
16cdcec7 | 2539 | goto fail_alloc; |
f2b636e8 | 2540 | } |
61d92c32 | 2541 | |
5cdc7ad3 | 2542 | max_active = fs_info->thread_pool_size; |
61d92c32 | 2543 | |
5cdc7ad3 QW |
2544 | fs_info->workers = |
2545 | btrfs_alloc_workqueue("worker", flags | WQ_HIGHPRI, | |
2546 | max_active, 16); | |
c8b97818 | 2547 | |
afe3d242 QW |
2548 | fs_info->delalloc_workers = |
2549 | btrfs_alloc_workqueue("delalloc", flags, max_active, 2); | |
771ed689 | 2550 | |
a44903ab QW |
2551 | fs_info->flush_workers = |
2552 | btrfs_alloc_workqueue("flush_delalloc", flags, max_active, 0); | |
8ccf6f19 | 2553 | |
e66f0bb1 QW |
2554 | fs_info->caching_workers = |
2555 | btrfs_alloc_workqueue("cache", flags, max_active, 0); | |
61b49440 | 2556 | |
a8c93d4e QW |
2557 | /* |
2558 | * a higher idle thresh on the submit workers makes it much more | |
61b49440 CM |
2559 | * likely that bios will be send down in a sane order to the |
2560 | * devices | |
2561 | */ | |
a8c93d4e QW |
2562 | fs_info->submit_workers = |
2563 | btrfs_alloc_workqueue("submit", flags, | |
2564 | min_t(u64, fs_devices->num_devices, | |
2565 | max_active), 64); | |
53863232 | 2566 | |
dc6e3209 QW |
2567 | fs_info->fixup_workers = |
2568 | btrfs_alloc_workqueue("fixup", flags, 1, 0); | |
61b49440 CM |
2569 | |
2570 | /* | |
2571 | * endios are largely parallel and should have a very | |
2572 | * low idle thresh | |
2573 | */ | |
fccb5d86 QW |
2574 | fs_info->endio_workers = |
2575 | btrfs_alloc_workqueue("endio", flags, max_active, 4); | |
2576 | fs_info->endio_meta_workers = | |
2577 | btrfs_alloc_workqueue("endio-meta", flags, max_active, 4); | |
2578 | fs_info->endio_meta_write_workers = | |
2579 | btrfs_alloc_workqueue("endio-meta-write", flags, max_active, 2); | |
2580 | fs_info->endio_raid56_workers = | |
2581 | btrfs_alloc_workqueue("endio-raid56", flags, max_active, 4); | |
d05a33ac QW |
2582 | fs_info->rmw_workers = |
2583 | btrfs_alloc_workqueue("rmw", flags, max_active, 2); | |
fccb5d86 QW |
2584 | fs_info->endio_write_workers = |
2585 | btrfs_alloc_workqueue("endio-write", flags, max_active, 2); | |
2586 | fs_info->endio_freespace_worker = | |
2587 | btrfs_alloc_workqueue("freespace-write", flags, max_active, 0); | |
5b3bc44e QW |
2588 | fs_info->delayed_workers = |
2589 | btrfs_alloc_workqueue("delayed-meta", flags, max_active, 0); | |
736cfa15 QW |
2590 | fs_info->readahead_workers = |
2591 | btrfs_alloc_workqueue("readahead", flags, max_active, 2); | |
fc97fab0 QW |
2592 | fs_info->qgroup_rescan_workers = |
2593 | btrfs_alloc_workqueue("qgroup-rescan", flags, 1, 0); | |
a79b7d4b CM |
2594 | fs_info->extent_workers = |
2595 | btrfs_alloc_workqueue("extent-refs", flags, | |
2596 | min_t(u64, fs_devices->num_devices, | |
2597 | max_active), 8); | |
61b49440 | 2598 | |
a8c93d4e | 2599 | if (!(fs_info->workers && fs_info->delalloc_workers && |
fccb5d86 QW |
2600 | fs_info->submit_workers && fs_info->flush_workers && |
2601 | fs_info->endio_workers && fs_info->endio_meta_workers && | |
2602 | fs_info->endio_meta_write_workers && | |
2603 | fs_info->endio_write_workers && fs_info->endio_raid56_workers && | |
e66f0bb1 | 2604 | fs_info->endio_freespace_worker && fs_info->rmw_workers && |
dc6e3209 | 2605 | fs_info->caching_workers && fs_info->readahead_workers && |
fc97fab0 | 2606 | fs_info->fixup_workers && fs_info->delayed_workers && |
a79b7d4b | 2607 | fs_info->fixup_workers && fs_info->extent_workers && |
fc97fab0 | 2608 | fs_info->qgroup_rescan_workers)) { |
fed425c7 | 2609 | err = -ENOMEM; |
0dc3b84a JB |
2610 | goto fail_sb_buffer; |
2611 | } | |
4543df7e | 2612 | |
4575c9cc | 2613 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
c8b97818 CM |
2614 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
2615 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); | |
4575c9cc | 2616 | |
db94535d CM |
2617 | tree_root->nodesize = nodesize; |
2618 | tree_root->leafsize = leafsize; | |
2619 | tree_root->sectorsize = sectorsize; | |
87ee04eb | 2620 | tree_root->stripesize = stripesize; |
a061fc8d CM |
2621 | |
2622 | sb->s_blocksize = sectorsize; | |
2623 | sb->s_blocksize_bits = blksize_bits(sectorsize); | |
db94535d | 2624 | |
3cae210f | 2625 | if (btrfs_super_magic(disk_super) != BTRFS_MAGIC) { |
efe120a0 | 2626 | printk(KERN_INFO "BTRFS: valid FS not found on %s\n", sb->s_id); |
39279cc3 CM |
2627 | goto fail_sb_buffer; |
2628 | } | |
19c00ddc | 2629 | |
8d082fb7 | 2630 | if (sectorsize != PAGE_SIZE) { |
efe120a0 | 2631 | printk(KERN_WARNING "BTRFS: Incompatible sector size(%lu) " |
8d082fb7 | 2632 | "found on %s\n", (unsigned long)sectorsize, sb->s_id); |
941b2ddf KM |
2633 | goto fail_sb_buffer; |
2634 | } | |
2635 | ||
925baedd | 2636 | mutex_lock(&fs_info->chunk_mutex); |
e4404d6e | 2637 | ret = btrfs_read_sys_array(tree_root); |
925baedd | 2638 | mutex_unlock(&fs_info->chunk_mutex); |
84eed90f | 2639 | if (ret) { |
efe120a0 | 2640 | printk(KERN_WARNING "BTRFS: failed to read the system " |
d397712b | 2641 | "array on %s\n", sb->s_id); |
5d4f98a2 | 2642 | goto fail_sb_buffer; |
84eed90f | 2643 | } |
0b86a832 CM |
2644 | |
2645 | blocksize = btrfs_level_size(tree_root, | |
2646 | btrfs_super_chunk_root_level(disk_super)); | |
84234f3a | 2647 | generation = btrfs_super_chunk_root_generation(disk_super); |
0b86a832 CM |
2648 | |
2649 | __setup_root(nodesize, leafsize, sectorsize, stripesize, | |
2650 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); | |
2651 | ||
2652 | chunk_root->node = read_tree_block(chunk_root, | |
2653 | btrfs_super_chunk_root(disk_super), | |
84234f3a | 2654 | blocksize, generation); |
416bc658 JB |
2655 | if (!chunk_root->node || |
2656 | !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { | |
efe120a0 | 2657 | printk(KERN_WARNING "BTRFS: failed to read chunk root on %s\n", |
83121942 | 2658 | sb->s_id); |
af31f5e5 | 2659 | goto fail_tree_roots; |
83121942 | 2660 | } |
5d4f98a2 YZ |
2661 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
2662 | chunk_root->commit_root = btrfs_root_node(chunk_root); | |
0b86a832 | 2663 | |
e17cade2 | 2664 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
b308bc2f | 2665 | btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE); |
e17cade2 | 2666 | |
0b86a832 | 2667 | ret = btrfs_read_chunk_tree(chunk_root); |
2b82032c | 2668 | if (ret) { |
efe120a0 | 2669 | printk(KERN_WARNING "BTRFS: failed to read chunk tree on %s\n", |
d397712b | 2670 | sb->s_id); |
af31f5e5 | 2671 | goto fail_tree_roots; |
2b82032c | 2672 | } |
0b86a832 | 2673 | |
8dabb742 SB |
2674 | /* |
2675 | * keep the device that is marked to be the target device for the | |
2676 | * dev_replace procedure | |
2677 | */ | |
2678 | btrfs_close_extra_devices(fs_info, fs_devices, 0); | |
dfe25020 | 2679 | |
a6b0d5c8 | 2680 | if (!fs_devices->latest_bdev) { |
efe120a0 | 2681 | printk(KERN_CRIT "BTRFS: failed to read devices on %s\n", |
a6b0d5c8 CM |
2682 | sb->s_id); |
2683 | goto fail_tree_roots; | |
2684 | } | |
2685 | ||
af31f5e5 | 2686 | retry_root_backup: |
db94535d CM |
2687 | blocksize = btrfs_level_size(tree_root, |
2688 | btrfs_super_root_level(disk_super)); | |
84234f3a | 2689 | generation = btrfs_super_generation(disk_super); |
0b86a832 | 2690 | |
e20d96d6 | 2691 | tree_root->node = read_tree_block(tree_root, |
db94535d | 2692 | btrfs_super_root(disk_super), |
84234f3a | 2693 | blocksize, generation); |
af31f5e5 CM |
2694 | if (!tree_root->node || |
2695 | !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { | |
efe120a0 | 2696 | printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n", |
83121942 | 2697 | sb->s_id); |
af31f5e5 CM |
2698 | |
2699 | goto recovery_tree_root; | |
83121942 | 2700 | } |
af31f5e5 | 2701 | |
5d4f98a2 YZ |
2702 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
2703 | tree_root->commit_root = btrfs_root_node(tree_root); | |
69e9c6c6 | 2704 | btrfs_set_root_refs(&tree_root->root_item, 1); |
db94535d | 2705 | |
cb517eab MX |
2706 | location.objectid = BTRFS_EXTENT_TREE_OBJECTID; |
2707 | location.type = BTRFS_ROOT_ITEM_KEY; | |
2708 | location.offset = 0; | |
2709 | ||
2710 | extent_root = btrfs_read_tree_root(tree_root, &location); | |
2711 | if (IS_ERR(extent_root)) { | |
2712 | ret = PTR_ERR(extent_root); | |
af31f5e5 | 2713 | goto recovery_tree_root; |
cb517eab | 2714 | } |
27cdeb70 | 2715 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &extent_root->state); |
cb517eab | 2716 | fs_info->extent_root = extent_root; |
0b86a832 | 2717 | |
cb517eab MX |
2718 | location.objectid = BTRFS_DEV_TREE_OBJECTID; |
2719 | dev_root = btrfs_read_tree_root(tree_root, &location); | |
2720 | if (IS_ERR(dev_root)) { | |
2721 | ret = PTR_ERR(dev_root); | |
af31f5e5 | 2722 | goto recovery_tree_root; |
cb517eab | 2723 | } |
27cdeb70 | 2724 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &dev_root->state); |
cb517eab MX |
2725 | fs_info->dev_root = dev_root; |
2726 | btrfs_init_devices_late(fs_info); | |
3768f368 | 2727 | |
cb517eab MX |
2728 | location.objectid = BTRFS_CSUM_TREE_OBJECTID; |
2729 | csum_root = btrfs_read_tree_root(tree_root, &location); | |
2730 | if (IS_ERR(csum_root)) { | |
2731 | ret = PTR_ERR(csum_root); | |
af31f5e5 | 2732 | goto recovery_tree_root; |
cb517eab | 2733 | } |
27cdeb70 | 2734 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &csum_root->state); |
cb517eab | 2735 | fs_info->csum_root = csum_root; |
d20f7043 | 2736 | |
cb517eab MX |
2737 | location.objectid = BTRFS_QUOTA_TREE_OBJECTID; |
2738 | quota_root = btrfs_read_tree_root(tree_root, &location); | |
2739 | if (!IS_ERR(quota_root)) { | |
27cdeb70 | 2740 | set_bit(BTRFS_ROOT_TRACK_DIRTY, "a_root->state); |
bcef60f2 AJ |
2741 | fs_info->quota_enabled = 1; |
2742 | fs_info->pending_quota_state = 1; | |
cb517eab | 2743 | fs_info->quota_root = quota_root; |
bcef60f2 AJ |
2744 | } |
2745 | ||
f7a81ea4 SB |
2746 | location.objectid = BTRFS_UUID_TREE_OBJECTID; |
2747 | uuid_root = btrfs_read_tree_root(tree_root, &location); | |
2748 | if (IS_ERR(uuid_root)) { | |
2749 | ret = PTR_ERR(uuid_root); | |
2750 | if (ret != -ENOENT) | |
2751 | goto recovery_tree_root; | |
2752 | create_uuid_tree = true; | |
70f80175 | 2753 | check_uuid_tree = false; |
f7a81ea4 | 2754 | } else { |
27cdeb70 | 2755 | set_bit(BTRFS_ROOT_TRACK_DIRTY, &uuid_root->state); |
f7a81ea4 | 2756 | fs_info->uuid_root = uuid_root; |
70f80175 SB |
2757 | create_uuid_tree = false; |
2758 | check_uuid_tree = | |
2759 | generation != btrfs_super_uuid_tree_generation(disk_super); | |
f7a81ea4 SB |
2760 | } |
2761 | ||
8929ecfa YZ |
2762 | fs_info->generation = generation; |
2763 | fs_info->last_trans_committed = generation; | |
8929ecfa | 2764 | |
68310a5e ID |
2765 | ret = btrfs_recover_balance(fs_info); |
2766 | if (ret) { | |
efe120a0 | 2767 | printk(KERN_WARNING "BTRFS: failed to recover balance\n"); |
68310a5e ID |
2768 | goto fail_block_groups; |
2769 | } | |
2770 | ||
733f4fbb SB |
2771 | ret = btrfs_init_dev_stats(fs_info); |
2772 | if (ret) { | |
efe120a0 | 2773 | printk(KERN_ERR "BTRFS: failed to init dev_stats: %d\n", |
733f4fbb SB |
2774 | ret); |
2775 | goto fail_block_groups; | |
2776 | } | |
2777 | ||
8dabb742 SB |
2778 | ret = btrfs_init_dev_replace(fs_info); |
2779 | if (ret) { | |
efe120a0 | 2780 | pr_err("BTRFS: failed to init dev_replace: %d\n", ret); |
8dabb742 SB |
2781 | goto fail_block_groups; |
2782 | } | |
2783 | ||
2784 | btrfs_close_extra_devices(fs_info, fs_devices, 1); | |
2785 | ||
5ac1d209 | 2786 | ret = btrfs_sysfs_add_one(fs_info); |
c59021f8 | 2787 | if (ret) { |
efe120a0 | 2788 | pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); |
c59021f8 | 2789 | goto fail_block_groups; |
2790 | } | |
2791 | ||
c59021f8 | 2792 | ret = btrfs_init_space_info(fs_info); |
2793 | if (ret) { | |
efe120a0 | 2794 | printk(KERN_ERR "BTRFS: Failed to initial space info: %d\n", ret); |
2365dd3c | 2795 | goto fail_sysfs; |
c59021f8 | 2796 | } |
2797 | ||
1b1d1f66 JB |
2798 | ret = btrfs_read_block_groups(extent_root); |
2799 | if (ret) { | |
efe120a0 | 2800 | printk(KERN_ERR "BTRFS: Failed to read block groups: %d\n", ret); |
2365dd3c | 2801 | goto fail_sysfs; |
1b1d1f66 | 2802 | } |
5af3e8cc SB |
2803 | fs_info->num_tolerated_disk_barrier_failures = |
2804 | btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); | |
292fd7fc SB |
2805 | if (fs_info->fs_devices->missing_devices > |
2806 | fs_info->num_tolerated_disk_barrier_failures && | |
2807 | !(sb->s_flags & MS_RDONLY)) { | |
efe120a0 FH |
2808 | printk(KERN_WARNING "BTRFS: " |
2809 | "too many missing devices, writeable mount is not allowed\n"); | |
2365dd3c | 2810 | goto fail_sysfs; |
292fd7fc | 2811 | } |
9078a3e1 | 2812 | |
a74a4b97 CM |
2813 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
2814 | "btrfs-cleaner"); | |
57506d50 | 2815 | if (IS_ERR(fs_info->cleaner_kthread)) |
2365dd3c | 2816 | goto fail_sysfs; |
a74a4b97 CM |
2817 | |
2818 | fs_info->transaction_kthread = kthread_run(transaction_kthread, | |
2819 | tree_root, | |
2820 | "btrfs-transaction"); | |
57506d50 | 2821 | if (IS_ERR(fs_info->transaction_kthread)) |
3f157a2f | 2822 | goto fail_cleaner; |
a74a4b97 | 2823 | |
c289811c CM |
2824 | if (!btrfs_test_opt(tree_root, SSD) && |
2825 | !btrfs_test_opt(tree_root, NOSSD) && | |
2826 | !fs_info->fs_devices->rotating) { | |
efe120a0 | 2827 | printk(KERN_INFO "BTRFS: detected SSD devices, enabling SSD " |
c289811c CM |
2828 | "mode\n"); |
2829 | btrfs_set_opt(fs_info->mount_opt, SSD); | |
2830 | } | |
2831 | ||
3818aea2 QW |
2832 | /* Set the real inode map cache flag */ |
2833 | if (btrfs_test_opt(tree_root, CHANGE_INODE_CACHE)) | |
2834 | btrfs_set_opt(tree_root->fs_info->mount_opt, INODE_MAP_CACHE); | |
2835 | ||
21adbd5c SB |
2836 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2837 | if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { | |
2838 | ret = btrfsic_mount(tree_root, fs_devices, | |
2839 | btrfs_test_opt(tree_root, | |
2840 | CHECK_INTEGRITY_INCLUDING_EXTENT_DATA) ? | |
2841 | 1 : 0, | |
2842 | fs_info->check_integrity_print_mask); | |
2843 | if (ret) | |
efe120a0 | 2844 | printk(KERN_WARNING "BTRFS: failed to initialize" |
21adbd5c SB |
2845 | " integrity check module %s\n", sb->s_id); |
2846 | } | |
2847 | #endif | |
bcef60f2 AJ |
2848 | ret = btrfs_read_qgroup_config(fs_info); |
2849 | if (ret) | |
2850 | goto fail_trans_kthread; | |
21adbd5c | 2851 | |
acce952b | 2852 | /* do not make disk changes in broken FS */ |
68ce9682 | 2853 | if (btrfs_super_log_root(disk_super) != 0) { |
e02119d5 CM |
2854 | u64 bytenr = btrfs_super_log_root(disk_super); |
2855 | ||
7c2ca468 | 2856 | if (fs_devices->rw_devices == 0) { |
efe120a0 | 2857 | printk(KERN_WARNING "BTRFS: log replay required " |
d397712b | 2858 | "on RO media\n"); |
7c2ca468 | 2859 | err = -EIO; |
bcef60f2 | 2860 | goto fail_qgroup; |
7c2ca468 | 2861 | } |
e02119d5 CM |
2862 | blocksize = |
2863 | btrfs_level_size(tree_root, | |
2864 | btrfs_super_log_root_level(disk_super)); | |
d18a2c44 | 2865 | |
6f07e42e | 2866 | log_tree_root = btrfs_alloc_root(fs_info); |
676e4c86 DC |
2867 | if (!log_tree_root) { |
2868 | err = -ENOMEM; | |
bcef60f2 | 2869 | goto fail_qgroup; |
676e4c86 | 2870 | } |
e02119d5 CM |
2871 | |
2872 | __setup_root(nodesize, leafsize, sectorsize, stripesize, | |
2873 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); | |
2874 | ||
2875 | log_tree_root->node = read_tree_block(tree_root, bytenr, | |
84234f3a YZ |
2876 | blocksize, |
2877 | generation + 1); | |
416bc658 JB |
2878 | if (!log_tree_root->node || |
2879 | !extent_buffer_uptodate(log_tree_root->node)) { | |
efe120a0 | 2880 | printk(KERN_ERR "BTRFS: failed to read log tree\n"); |
416bc658 JB |
2881 | free_extent_buffer(log_tree_root->node); |
2882 | kfree(log_tree_root); | |
28c16cbb | 2883 | goto fail_qgroup; |
416bc658 | 2884 | } |
79787eaa | 2885 | /* returns with log_tree_root freed on success */ |
e02119d5 | 2886 | ret = btrfs_recover_log_trees(log_tree_root); |
79787eaa JM |
2887 | if (ret) { |
2888 | btrfs_error(tree_root->fs_info, ret, | |
2889 | "Failed to recover log tree"); | |
2890 | free_extent_buffer(log_tree_root->node); | |
2891 | kfree(log_tree_root); | |
28c16cbb | 2892 | goto fail_qgroup; |
79787eaa | 2893 | } |
e556ce2c YZ |
2894 | |
2895 | if (sb->s_flags & MS_RDONLY) { | |
79787eaa JM |
2896 | ret = btrfs_commit_super(tree_root); |
2897 | if (ret) | |
28c16cbb | 2898 | goto fail_qgroup; |
e556ce2c | 2899 | } |
e02119d5 | 2900 | } |
1a40e23b | 2901 | |
76dda93c | 2902 | ret = btrfs_find_orphan_roots(tree_root); |
79787eaa | 2903 | if (ret) |
28c16cbb | 2904 | goto fail_qgroup; |
76dda93c | 2905 | |
7c2ca468 | 2906 | if (!(sb->s_flags & MS_RDONLY)) { |
d68fc57b | 2907 | ret = btrfs_cleanup_fs_roots(fs_info); |
44c44af2 | 2908 | if (ret) |
28c16cbb | 2909 | goto fail_qgroup; |
d68fc57b | 2910 | |
5f316481 | 2911 | mutex_lock(&fs_info->cleaner_mutex); |
5d4f98a2 | 2912 | ret = btrfs_recover_relocation(tree_root); |
5f316481 | 2913 | mutex_unlock(&fs_info->cleaner_mutex); |
d7ce5843 MX |
2914 | if (ret < 0) { |
2915 | printk(KERN_WARNING | |
efe120a0 | 2916 | "BTRFS: failed to recover relocation\n"); |
d7ce5843 | 2917 | err = -EINVAL; |
bcef60f2 | 2918 | goto fail_qgroup; |
d7ce5843 | 2919 | } |
7c2ca468 | 2920 | } |
1a40e23b | 2921 | |
3de4586c CM |
2922 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
2923 | location.type = BTRFS_ROOT_ITEM_KEY; | |
cb517eab | 2924 | location.offset = 0; |
3de4586c | 2925 | |
3de4586c | 2926 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
3140c9a3 DC |
2927 | if (IS_ERR(fs_info->fs_root)) { |
2928 | err = PTR_ERR(fs_info->fs_root); | |
bcef60f2 | 2929 | goto fail_qgroup; |
3140c9a3 | 2930 | } |
c289811c | 2931 | |
2b6ba629 ID |
2932 | if (sb->s_flags & MS_RDONLY) |
2933 | return 0; | |
59641015 | 2934 | |
2b6ba629 ID |
2935 | down_read(&fs_info->cleanup_work_sem); |
2936 | if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) || | |
2937 | (ret = btrfs_orphan_cleanup(fs_info->tree_root))) { | |
e3acc2a6 | 2938 | up_read(&fs_info->cleanup_work_sem); |
2b6ba629 ID |
2939 | close_ctree(tree_root); |
2940 | return ret; | |
2941 | } | |
2942 | up_read(&fs_info->cleanup_work_sem); | |
59641015 | 2943 | |
2b6ba629 ID |
2944 | ret = btrfs_resume_balance_async(fs_info); |
2945 | if (ret) { | |
efe120a0 | 2946 | printk(KERN_WARNING "BTRFS: failed to resume balance\n"); |
2b6ba629 ID |
2947 | close_ctree(tree_root); |
2948 | return ret; | |
e3acc2a6 JB |
2949 | } |
2950 | ||
8dabb742 SB |
2951 | ret = btrfs_resume_dev_replace_async(fs_info); |
2952 | if (ret) { | |
efe120a0 | 2953 | pr_warn("BTRFS: failed to resume dev_replace\n"); |
8dabb742 SB |
2954 | close_ctree(tree_root); |
2955 | return ret; | |
2956 | } | |
2957 | ||
b382a324 JS |
2958 | btrfs_qgroup_rescan_resume(fs_info); |
2959 | ||
f7a81ea4 | 2960 | if (create_uuid_tree) { |
efe120a0 | 2961 | pr_info("BTRFS: creating UUID tree\n"); |
f7a81ea4 SB |
2962 | ret = btrfs_create_uuid_tree(fs_info); |
2963 | if (ret) { | |
efe120a0 | 2964 | pr_warn("BTRFS: failed to create the UUID tree %d\n", |
f7a81ea4 SB |
2965 | ret); |
2966 | close_ctree(tree_root); | |
2967 | return ret; | |
2968 | } | |
f420ee1e SB |
2969 | } else if (check_uuid_tree || |
2970 | btrfs_test_opt(tree_root, RESCAN_UUID_TREE)) { | |
efe120a0 | 2971 | pr_info("BTRFS: checking UUID tree\n"); |
70f80175 SB |
2972 | ret = btrfs_check_uuid_tree(fs_info); |
2973 | if (ret) { | |
efe120a0 | 2974 | pr_warn("BTRFS: failed to check the UUID tree %d\n", |
70f80175 SB |
2975 | ret); |
2976 | close_ctree(tree_root); | |
2977 | return ret; | |
2978 | } | |
2979 | } else { | |
2980 | fs_info->update_uuid_tree_gen = 1; | |
f7a81ea4 SB |
2981 | } |
2982 | ||
ad2b2c80 | 2983 | return 0; |
39279cc3 | 2984 | |
bcef60f2 AJ |
2985 | fail_qgroup: |
2986 | btrfs_free_qgroup_config(fs_info); | |
7c2ca468 CM |
2987 | fail_trans_kthread: |
2988 | kthread_stop(fs_info->transaction_kthread); | |
54067ae9 | 2989 | btrfs_cleanup_transaction(fs_info->tree_root); |
faa2dbf0 | 2990 | btrfs_free_fs_roots(fs_info); |
3f157a2f | 2991 | fail_cleaner: |
a74a4b97 | 2992 | kthread_stop(fs_info->cleaner_kthread); |
7c2ca468 CM |
2993 | |
2994 | /* | |
2995 | * make sure we're done with the btree inode before we stop our | |
2996 | * kthreads | |
2997 | */ | |
2998 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); | |
7c2ca468 | 2999 | |
2365dd3c AJ |
3000 | fail_sysfs: |
3001 | btrfs_sysfs_remove_one(fs_info); | |
3002 | ||
1b1d1f66 | 3003 | fail_block_groups: |
54067ae9 | 3004 | btrfs_put_block_group_cache(fs_info); |
1b1d1f66 | 3005 | btrfs_free_block_groups(fs_info); |
af31f5e5 CM |
3006 | |
3007 | fail_tree_roots: | |
3008 | free_root_pointers(fs_info, 1); | |
2b8195bb | 3009 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
af31f5e5 | 3010 | |
39279cc3 | 3011 | fail_sb_buffer: |
7abadb64 | 3012 | btrfs_stop_all_workers(fs_info); |
16cdcec7 | 3013 | fail_alloc: |
4543df7e | 3014 | fail_iput: |
586e46e2 ID |
3015 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
3016 | ||
4543df7e | 3017 | iput(fs_info->btree_inode); |
c404e0dc MX |
3018 | fail_bio_counter: |
3019 | percpu_counter_destroy(&fs_info->bio_counter); | |
963d678b MX |
3020 | fail_delalloc_bytes: |
3021 | percpu_counter_destroy(&fs_info->delalloc_bytes); | |
e2d84521 MX |
3022 | fail_dirty_metadata_bytes: |
3023 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); | |
ad081f14 | 3024 | fail_bdi: |
7e662854 | 3025 | bdi_destroy(&fs_info->bdi); |
76dda93c YZ |
3026 | fail_srcu: |
3027 | cleanup_srcu_struct(&fs_info->subvol_srcu); | |
7e662854 | 3028 | fail: |
53b381b3 | 3029 | btrfs_free_stripe_hash_table(fs_info); |
586e46e2 | 3030 | btrfs_close_devices(fs_info->fs_devices); |
ad2b2c80 | 3031 | return err; |
af31f5e5 CM |
3032 | |
3033 | recovery_tree_root: | |
af31f5e5 CM |
3034 | if (!btrfs_test_opt(tree_root, RECOVERY)) |
3035 | goto fail_tree_roots; | |
3036 | ||
3037 | free_root_pointers(fs_info, 0); | |
3038 | ||
3039 | /* don't use the log in recovery mode, it won't be valid */ | |
3040 | btrfs_set_super_log_root(disk_super, 0); | |
3041 | ||
3042 | /* we can't trust the free space cache either */ | |
3043 | btrfs_set_opt(fs_info->mount_opt, CLEAR_CACHE); | |
3044 | ||
3045 | ret = next_root_backup(fs_info, fs_info->super_copy, | |
3046 | &num_backups_tried, &backup_index); | |
3047 | if (ret == -1) | |
3048 | goto fail_block_groups; | |
3049 | goto retry_root_backup; | |
eb60ceac CM |
3050 | } |
3051 | ||
f2984462 CM |
3052 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
3053 | { | |
f2984462 CM |
3054 | if (uptodate) { |
3055 | set_buffer_uptodate(bh); | |
3056 | } else { | |
442a4f63 SB |
3057 | struct btrfs_device *device = (struct btrfs_device *) |
3058 | bh->b_private; | |
3059 | ||
efe120a0 | 3060 | printk_ratelimited_in_rcu(KERN_WARNING "BTRFS: lost page write due to " |
606686ee JB |
3061 | "I/O error on %s\n", |
3062 | rcu_str_deref(device->name)); | |
1259ab75 CM |
3063 | /* note, we dont' set_buffer_write_io_error because we have |
3064 | * our own ways of dealing with the IO errors | |
3065 | */ | |
f2984462 | 3066 | clear_buffer_uptodate(bh); |
442a4f63 | 3067 | btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_WRITE_ERRS); |
f2984462 CM |
3068 | } |
3069 | unlock_buffer(bh); | |
3070 | put_bh(bh); | |
3071 | } | |
3072 | ||
a512bbf8 YZ |
3073 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
3074 | { | |
3075 | struct buffer_head *bh; | |
3076 | struct buffer_head *latest = NULL; | |
3077 | struct btrfs_super_block *super; | |
3078 | int i; | |
3079 | u64 transid = 0; | |
3080 | u64 bytenr; | |
3081 | ||
3082 | /* we would like to check all the supers, but that would make | |
3083 | * a btrfs mount succeed after a mkfs from a different FS. | |
3084 | * So, we need to add a special mount option to scan for | |
3085 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead | |
3086 | */ | |
3087 | for (i = 0; i < 1; i++) { | |
3088 | bytenr = btrfs_sb_offset(i); | |
8068a47e AJ |
3089 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
3090 | i_size_read(bdev->bd_inode)) | |
a512bbf8 | 3091 | break; |
8068a47e AJ |
3092 | bh = __bread(bdev, bytenr / 4096, |
3093 | BTRFS_SUPER_INFO_SIZE); | |
a512bbf8 YZ |
3094 | if (!bh) |
3095 | continue; | |
3096 | ||
3097 | super = (struct btrfs_super_block *)bh->b_data; | |
3098 | if (btrfs_super_bytenr(super) != bytenr || | |
3cae210f | 3099 | btrfs_super_magic(super) != BTRFS_MAGIC) { |
a512bbf8 YZ |
3100 | brelse(bh); |
3101 | continue; | |
3102 | } | |
3103 | ||
3104 | if (!latest || btrfs_super_generation(super) > transid) { | |
3105 | brelse(latest); | |
3106 | latest = bh; | |
3107 | transid = btrfs_super_generation(super); | |
3108 | } else { | |
3109 | brelse(bh); | |
3110 | } | |
3111 | } | |
3112 | return latest; | |
3113 | } | |
3114 | ||
4eedeb75 HH |
3115 | /* |
3116 | * this should be called twice, once with wait == 0 and | |
3117 | * once with wait == 1. When wait == 0 is done, all the buffer heads | |
3118 | * we write are pinned. | |
3119 | * | |
3120 | * They are released when wait == 1 is done. | |
3121 | * max_mirrors must be the same for both runs, and it indicates how | |
3122 | * many supers on this one device should be written. | |
3123 | * | |
3124 | * max_mirrors == 0 means to write them all. | |
3125 | */ | |
a512bbf8 YZ |
3126 | static int write_dev_supers(struct btrfs_device *device, |
3127 | struct btrfs_super_block *sb, | |
3128 | int do_barriers, int wait, int max_mirrors) | |
3129 | { | |
3130 | struct buffer_head *bh; | |
3131 | int i; | |
3132 | int ret; | |
3133 | int errors = 0; | |
3134 | u32 crc; | |
3135 | u64 bytenr; | |
a512bbf8 YZ |
3136 | |
3137 | if (max_mirrors == 0) | |
3138 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; | |
3139 | ||
a512bbf8 YZ |
3140 | for (i = 0; i < max_mirrors; i++) { |
3141 | bytenr = btrfs_sb_offset(i); | |
3142 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) | |
3143 | break; | |
3144 | ||
3145 | if (wait) { | |
3146 | bh = __find_get_block(device->bdev, bytenr / 4096, | |
3147 | BTRFS_SUPER_INFO_SIZE); | |
634554dc JB |
3148 | if (!bh) { |
3149 | errors++; | |
3150 | continue; | |
3151 | } | |
a512bbf8 | 3152 | wait_on_buffer(bh); |
4eedeb75 HH |
3153 | if (!buffer_uptodate(bh)) |
3154 | errors++; | |
3155 | ||
3156 | /* drop our reference */ | |
3157 | brelse(bh); | |
3158 | ||
3159 | /* drop the reference from the wait == 0 run */ | |
3160 | brelse(bh); | |
3161 | continue; | |
a512bbf8 YZ |
3162 | } else { |
3163 | btrfs_set_super_bytenr(sb, bytenr); | |
3164 | ||
3165 | crc = ~(u32)0; | |
b0496686 | 3166 | crc = btrfs_csum_data((char *)sb + |
a512bbf8 YZ |
3167 | BTRFS_CSUM_SIZE, crc, |
3168 | BTRFS_SUPER_INFO_SIZE - | |
3169 | BTRFS_CSUM_SIZE); | |
3170 | btrfs_csum_final(crc, sb->csum); | |
3171 | ||
4eedeb75 HH |
3172 | /* |
3173 | * one reference for us, and we leave it for the | |
3174 | * caller | |
3175 | */ | |
a512bbf8 YZ |
3176 | bh = __getblk(device->bdev, bytenr / 4096, |
3177 | BTRFS_SUPER_INFO_SIZE); | |
634554dc | 3178 | if (!bh) { |
efe120a0 | 3179 | printk(KERN_ERR "BTRFS: couldn't get super " |
634554dc JB |
3180 | "buffer head for bytenr %Lu\n", bytenr); |
3181 | errors++; | |
3182 | continue; | |
3183 | } | |
3184 | ||
a512bbf8 YZ |
3185 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
3186 | ||
4eedeb75 | 3187 | /* one reference for submit_bh */ |
a512bbf8 | 3188 | get_bh(bh); |
4eedeb75 HH |
3189 | |
3190 | set_buffer_uptodate(bh); | |
a512bbf8 YZ |
3191 | lock_buffer(bh); |
3192 | bh->b_end_io = btrfs_end_buffer_write_sync; | |
442a4f63 | 3193 | bh->b_private = device; |
a512bbf8 YZ |
3194 | } |
3195 | ||
387125fc CM |
3196 | /* |
3197 | * we fua the first super. The others we allow | |
3198 | * to go down lazy. | |
3199 | */ | |
e8117c26 WS |
3200 | if (i == 0) |
3201 | ret = btrfsic_submit_bh(WRITE_FUA, bh); | |
3202 | else | |
3203 | ret = btrfsic_submit_bh(WRITE_SYNC, bh); | |
4eedeb75 | 3204 | if (ret) |
a512bbf8 | 3205 | errors++; |
a512bbf8 YZ |
3206 | } |
3207 | return errors < i ? 0 : -1; | |
3208 | } | |
3209 | ||
387125fc CM |
3210 | /* |
3211 | * endio for the write_dev_flush, this will wake anyone waiting | |
3212 | * for the barrier when it is done | |
3213 | */ | |
3214 | static void btrfs_end_empty_barrier(struct bio *bio, int err) | |
3215 | { | |
3216 | if (err) { | |
3217 | if (err == -EOPNOTSUPP) | |
3218 | set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); | |
3219 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
3220 | } | |
3221 | if (bio->bi_private) | |
3222 | complete(bio->bi_private); | |
3223 | bio_put(bio); | |
3224 | } | |
3225 | ||
3226 | /* | |
3227 | * trigger flushes for one the devices. If you pass wait == 0, the flushes are | |
3228 | * sent down. With wait == 1, it waits for the previous flush. | |
3229 | * | |
3230 | * any device where the flush fails with eopnotsupp are flagged as not-barrier | |
3231 | * capable | |
3232 | */ | |
3233 | static int write_dev_flush(struct btrfs_device *device, int wait) | |
3234 | { | |
3235 | struct bio *bio; | |
3236 | int ret = 0; | |
3237 | ||
3238 | if (device->nobarriers) | |
3239 | return 0; | |
3240 | ||
3241 | if (wait) { | |
3242 | bio = device->flush_bio; | |
3243 | if (!bio) | |
3244 | return 0; | |
3245 | ||
3246 | wait_for_completion(&device->flush_wait); | |
3247 | ||
3248 | if (bio_flagged(bio, BIO_EOPNOTSUPP)) { | |
efe120a0 | 3249 | printk_in_rcu("BTRFS: disabling barriers on dev %s\n", |
606686ee | 3250 | rcu_str_deref(device->name)); |
387125fc | 3251 | device->nobarriers = 1; |
5af3e8cc | 3252 | } else if (!bio_flagged(bio, BIO_UPTODATE)) { |
387125fc | 3253 | ret = -EIO; |
5af3e8cc SB |
3254 | btrfs_dev_stat_inc_and_print(device, |
3255 | BTRFS_DEV_STAT_FLUSH_ERRS); | |
387125fc CM |
3256 | } |
3257 | ||
3258 | /* drop the reference from the wait == 0 run */ | |
3259 | bio_put(bio); | |
3260 | device->flush_bio = NULL; | |
3261 | ||
3262 | return ret; | |
3263 | } | |
3264 | ||
3265 | /* | |
3266 | * one reference for us, and we leave it for the | |
3267 | * caller | |
3268 | */ | |
9c017abc | 3269 | device->flush_bio = NULL; |
9be3395b | 3270 | bio = btrfs_io_bio_alloc(GFP_NOFS, 0); |
387125fc CM |
3271 | if (!bio) |
3272 | return -ENOMEM; | |
3273 | ||
3274 | bio->bi_end_io = btrfs_end_empty_barrier; | |
3275 | bio->bi_bdev = device->bdev; | |
3276 | init_completion(&device->flush_wait); | |
3277 | bio->bi_private = &device->flush_wait; | |
3278 | device->flush_bio = bio; | |
3279 | ||
3280 | bio_get(bio); | |
21adbd5c | 3281 | btrfsic_submit_bio(WRITE_FLUSH, bio); |
387125fc CM |
3282 | |
3283 | return 0; | |
3284 | } | |
3285 | ||
3286 | /* | |
3287 | * send an empty flush down to each device in parallel, | |
3288 | * then wait for them | |
3289 | */ | |
3290 | static int barrier_all_devices(struct btrfs_fs_info *info) | |
3291 | { | |
3292 | struct list_head *head; | |
3293 | struct btrfs_device *dev; | |
5af3e8cc SB |
3294 | int errors_send = 0; |
3295 | int errors_wait = 0; | |
387125fc CM |
3296 | int ret; |
3297 | ||
3298 | /* send down all the barriers */ | |
3299 | head = &info->fs_devices->devices; | |
3300 | list_for_each_entry_rcu(dev, head, dev_list) { | |
f88ba6a2 HS |
3301 | if (dev->missing) |
3302 | continue; | |
387125fc | 3303 | if (!dev->bdev) { |
5af3e8cc | 3304 | errors_send++; |
387125fc CM |
3305 | continue; |
3306 | } | |
3307 | if (!dev->in_fs_metadata || !dev->writeable) | |
3308 | continue; | |
3309 | ||
3310 | ret = write_dev_flush(dev, 0); | |
3311 | if (ret) | |
5af3e8cc | 3312 | errors_send++; |
387125fc CM |
3313 | } |
3314 | ||
3315 | /* wait for all the barriers */ | |
3316 | list_for_each_entry_rcu(dev, head, dev_list) { | |
f88ba6a2 HS |
3317 | if (dev->missing) |
3318 | continue; | |
387125fc | 3319 | if (!dev->bdev) { |
5af3e8cc | 3320 | errors_wait++; |
387125fc CM |
3321 | continue; |
3322 | } | |
3323 | if (!dev->in_fs_metadata || !dev->writeable) | |
3324 | continue; | |
3325 | ||
3326 | ret = write_dev_flush(dev, 1); | |
3327 | if (ret) | |
5af3e8cc | 3328 | errors_wait++; |
387125fc | 3329 | } |
5af3e8cc SB |
3330 | if (errors_send > info->num_tolerated_disk_barrier_failures || |
3331 | errors_wait > info->num_tolerated_disk_barrier_failures) | |
387125fc CM |
3332 | return -EIO; |
3333 | return 0; | |
3334 | } | |
3335 | ||
5af3e8cc SB |
3336 | int btrfs_calc_num_tolerated_disk_barrier_failures( |
3337 | struct btrfs_fs_info *fs_info) | |
3338 | { | |
3339 | struct btrfs_ioctl_space_info space; | |
3340 | struct btrfs_space_info *sinfo; | |
3341 | u64 types[] = {BTRFS_BLOCK_GROUP_DATA, | |
3342 | BTRFS_BLOCK_GROUP_SYSTEM, | |
3343 | BTRFS_BLOCK_GROUP_METADATA, | |
3344 | BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; | |
3345 | int num_types = 4; | |
3346 | int i; | |
3347 | int c; | |
3348 | int num_tolerated_disk_barrier_failures = | |
3349 | (int)fs_info->fs_devices->num_devices; | |
3350 | ||
3351 | for (i = 0; i < num_types; i++) { | |
3352 | struct btrfs_space_info *tmp; | |
3353 | ||
3354 | sinfo = NULL; | |
3355 | rcu_read_lock(); | |
3356 | list_for_each_entry_rcu(tmp, &fs_info->space_info, list) { | |
3357 | if (tmp->flags == types[i]) { | |
3358 | sinfo = tmp; | |
3359 | break; | |
3360 | } | |
3361 | } | |
3362 | rcu_read_unlock(); | |
3363 | ||
3364 | if (!sinfo) | |
3365 | continue; | |
3366 | ||
3367 | down_read(&sinfo->groups_sem); | |
3368 | for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { | |
3369 | if (!list_empty(&sinfo->block_groups[c])) { | |
3370 | u64 flags; | |
3371 | ||
3372 | btrfs_get_block_group_info( | |
3373 | &sinfo->block_groups[c], &space); | |
3374 | if (space.total_bytes == 0 || | |
3375 | space.used_bytes == 0) | |
3376 | continue; | |
3377 | flags = space.flags; | |
3378 | /* | |
3379 | * return | |
3380 | * 0: if dup, single or RAID0 is configured for | |
3381 | * any of metadata, system or data, else | |
3382 | * 1: if RAID5 is configured, or if RAID1 or | |
3383 | * RAID10 is configured and only two mirrors | |
3384 | * are used, else | |
3385 | * 2: if RAID6 is configured, else | |
3386 | * num_mirrors - 1: if RAID1 or RAID10 is | |
3387 | * configured and more than | |
3388 | * 2 mirrors are used. | |
3389 | */ | |
3390 | if (num_tolerated_disk_barrier_failures > 0 && | |
3391 | ((flags & (BTRFS_BLOCK_GROUP_DUP | | |
3392 | BTRFS_BLOCK_GROUP_RAID0)) || | |
3393 | ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) | |
3394 | == 0))) | |
3395 | num_tolerated_disk_barrier_failures = 0; | |
53b381b3 DW |
3396 | else if (num_tolerated_disk_barrier_failures > 1) { |
3397 | if (flags & (BTRFS_BLOCK_GROUP_RAID1 | | |
3398 | BTRFS_BLOCK_GROUP_RAID5 | | |
3399 | BTRFS_BLOCK_GROUP_RAID10)) { | |
3400 | num_tolerated_disk_barrier_failures = 1; | |
3401 | } else if (flags & | |
15b0a89d | 3402 | BTRFS_BLOCK_GROUP_RAID6) { |
53b381b3 DW |
3403 | num_tolerated_disk_barrier_failures = 2; |
3404 | } | |
3405 | } | |
5af3e8cc SB |
3406 | } |
3407 | } | |
3408 | up_read(&sinfo->groups_sem); | |
3409 | } | |
3410 | ||
3411 | return num_tolerated_disk_barrier_failures; | |
3412 | } | |
3413 | ||
48a3b636 | 3414 | static int write_all_supers(struct btrfs_root *root, int max_mirrors) |
f2984462 | 3415 | { |
e5e9a520 | 3416 | struct list_head *head; |
f2984462 | 3417 | struct btrfs_device *dev; |
a061fc8d | 3418 | struct btrfs_super_block *sb; |
f2984462 | 3419 | struct btrfs_dev_item *dev_item; |
f2984462 CM |
3420 | int ret; |
3421 | int do_barriers; | |
a236aed1 CM |
3422 | int max_errors; |
3423 | int total_errors = 0; | |
a061fc8d | 3424 | u64 flags; |
f2984462 CM |
3425 | |
3426 | do_barriers = !btrfs_test_opt(root, NOBARRIER); | |
af31f5e5 | 3427 | backup_super_roots(root->fs_info); |
f2984462 | 3428 | |
6c41761f | 3429 | sb = root->fs_info->super_for_commit; |
a061fc8d | 3430 | dev_item = &sb->dev_item; |
e5e9a520 | 3431 | |
174ba509 | 3432 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
e5e9a520 | 3433 | head = &root->fs_info->fs_devices->devices; |
d7306801 | 3434 | max_errors = btrfs_super_num_devices(root->fs_info->super_copy) - 1; |
387125fc | 3435 | |
5af3e8cc SB |
3436 | if (do_barriers) { |
3437 | ret = barrier_all_devices(root->fs_info); | |
3438 | if (ret) { | |
3439 | mutex_unlock( | |
3440 | &root->fs_info->fs_devices->device_list_mutex); | |
3441 | btrfs_error(root->fs_info, ret, | |
3442 | "errors while submitting device barriers."); | |
3443 | return ret; | |
3444 | } | |
3445 | } | |
387125fc | 3446 | |
1f78160c | 3447 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3448 | if (!dev->bdev) { |
3449 | total_errors++; | |
3450 | continue; | |
3451 | } | |
2b82032c | 3452 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3453 | continue; |
3454 | ||
2b82032c | 3455 | btrfs_set_stack_device_generation(dev_item, 0); |
a061fc8d CM |
3456 | btrfs_set_stack_device_type(dev_item, dev->type); |
3457 | btrfs_set_stack_device_id(dev_item, dev->devid); | |
7df69d3e MX |
3458 | btrfs_set_stack_device_total_bytes(dev_item, |
3459 | dev->disk_total_bytes); | |
a061fc8d CM |
3460 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
3461 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); | |
3462 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); | |
3463 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); | |
3464 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); | |
2b82032c | 3465 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
a512bbf8 | 3466 | |
a061fc8d CM |
3467 | flags = btrfs_super_flags(sb); |
3468 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); | |
3469 | ||
a512bbf8 | 3470 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
a236aed1 CM |
3471 | if (ret) |
3472 | total_errors++; | |
f2984462 | 3473 | } |
a236aed1 | 3474 | if (total_errors > max_errors) { |
efe120a0 | 3475 | btrfs_err(root->fs_info, "%d errors while writing supers", |
d397712b | 3476 | total_errors); |
a724b436 | 3477 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
79787eaa | 3478 | |
9d565ba4 SB |
3479 | /* FUA is masked off if unsupported and can't be the reason */ |
3480 | btrfs_error(root->fs_info, -EIO, | |
3481 | "%d errors while writing supers", total_errors); | |
3482 | return -EIO; | |
a236aed1 | 3483 | } |
f2984462 | 3484 | |
a512bbf8 | 3485 | total_errors = 0; |
1f78160c | 3486 | list_for_each_entry_rcu(dev, head, dev_list) { |
dfe25020 CM |
3487 | if (!dev->bdev) |
3488 | continue; | |
2b82032c | 3489 | if (!dev->in_fs_metadata || !dev->writeable) |
dfe25020 CM |
3490 | continue; |
3491 | ||
a512bbf8 YZ |
3492 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
3493 | if (ret) | |
3494 | total_errors++; | |
f2984462 | 3495 | } |
174ba509 | 3496 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
a236aed1 | 3497 | if (total_errors > max_errors) { |
79787eaa JM |
3498 | btrfs_error(root->fs_info, -EIO, |
3499 | "%d errors while writing supers", total_errors); | |
3500 | return -EIO; | |
a236aed1 | 3501 | } |
f2984462 CM |
3502 | return 0; |
3503 | } | |
3504 | ||
a512bbf8 YZ |
3505 | int write_ctree_super(struct btrfs_trans_handle *trans, |
3506 | struct btrfs_root *root, int max_mirrors) | |
eb60ceac | 3507 | { |
f570e757 | 3508 | return write_all_supers(root, max_mirrors); |
cfaa7295 CM |
3509 | } |
3510 | ||
cb517eab MX |
3511 | /* Drop a fs root from the radix tree and free it. */ |
3512 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, | |
3513 | struct btrfs_root *root) | |
2619ba1f | 3514 | { |
4df27c4d | 3515 | spin_lock(&fs_info->fs_roots_radix_lock); |
2619ba1f CM |
3516 | radix_tree_delete(&fs_info->fs_roots_radix, |
3517 | (unsigned long)root->root_key.objectid); | |
4df27c4d | 3518 | spin_unlock(&fs_info->fs_roots_radix_lock); |
76dda93c YZ |
3519 | |
3520 | if (btrfs_root_refs(&root->root_item) == 0) | |
3521 | synchronize_srcu(&fs_info->subvol_srcu); | |
3522 | ||
1a4319cc | 3523 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
3321719e | 3524 | btrfs_free_log(NULL, root); |
3321719e | 3525 | |
faa2dbf0 JB |
3526 | if (root->free_ino_pinned) |
3527 | __btrfs_remove_free_space_cache(root->free_ino_pinned); | |
3528 | if (root->free_ino_ctl) | |
3529 | __btrfs_remove_free_space_cache(root->free_ino_ctl); | |
4df27c4d | 3530 | free_fs_root(root); |
4df27c4d YZ |
3531 | } |
3532 | ||
3533 | static void free_fs_root(struct btrfs_root *root) | |
3534 | { | |
57cdc8db | 3535 | iput(root->ino_cache_inode); |
4df27c4d | 3536 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
1cb048f5 FDBM |
3537 | btrfs_free_block_rsv(root, root->orphan_block_rsv); |
3538 | root->orphan_block_rsv = NULL; | |
0ee5dc67 AV |
3539 | if (root->anon_dev) |
3540 | free_anon_bdev(root->anon_dev); | |
8257b2dc MX |
3541 | if (root->subv_writers) |
3542 | btrfs_free_subvolume_writers(root->subv_writers); | |
4df27c4d YZ |
3543 | free_extent_buffer(root->node); |
3544 | free_extent_buffer(root->commit_root); | |
581bb050 LZ |
3545 | kfree(root->free_ino_ctl); |
3546 | kfree(root->free_ino_pinned); | |
d397712b | 3547 | kfree(root->name); |
b0feb9d9 | 3548 | btrfs_put_fs_root(root); |
2619ba1f CM |
3549 | } |
3550 | ||
cb517eab MX |
3551 | void btrfs_free_fs_root(struct btrfs_root *root) |
3552 | { | |
3553 | free_fs_root(root); | |
2619ba1f CM |
3554 | } |
3555 | ||
c146afad | 3556 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
cfaa7295 | 3557 | { |
c146afad YZ |
3558 | u64 root_objectid = 0; |
3559 | struct btrfs_root *gang[8]; | |
65d33fd7 QW |
3560 | int i = 0; |
3561 | int err = 0; | |
3562 | unsigned int ret = 0; | |
3563 | int index; | |
e089f05c | 3564 | |
c146afad | 3565 | while (1) { |
65d33fd7 | 3566 | index = srcu_read_lock(&fs_info->subvol_srcu); |
c146afad YZ |
3567 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
3568 | (void **)gang, root_objectid, | |
3569 | ARRAY_SIZE(gang)); | |
65d33fd7 QW |
3570 | if (!ret) { |
3571 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
c146afad | 3572 | break; |
65d33fd7 | 3573 | } |
5d4f98a2 | 3574 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
65d33fd7 | 3575 | |
c146afad | 3576 | for (i = 0; i < ret; i++) { |
65d33fd7 QW |
3577 | /* Avoid to grab roots in dead_roots */ |
3578 | if (btrfs_root_refs(&gang[i]->root_item) == 0) { | |
3579 | gang[i] = NULL; | |
3580 | continue; | |
3581 | } | |
3582 | /* grab all the search result for later use */ | |
3583 | gang[i] = btrfs_grab_fs_root(gang[i]); | |
3584 | } | |
3585 | srcu_read_unlock(&fs_info->subvol_srcu, index); | |
66b4ffd1 | 3586 | |
65d33fd7 QW |
3587 | for (i = 0; i < ret; i++) { |
3588 | if (!gang[i]) | |
3589 | continue; | |
c146afad | 3590 | root_objectid = gang[i]->root_key.objectid; |
66b4ffd1 JB |
3591 | err = btrfs_orphan_cleanup(gang[i]); |
3592 | if (err) | |
65d33fd7 QW |
3593 | break; |
3594 | btrfs_put_fs_root(gang[i]); | |
c146afad YZ |
3595 | } |
3596 | root_objectid++; | |
3597 | } | |
65d33fd7 QW |
3598 | |
3599 | /* release the uncleaned roots due to error */ | |
3600 | for (; i < ret; i++) { | |
3601 | if (gang[i]) | |
3602 | btrfs_put_fs_root(gang[i]); | |
3603 | } | |
3604 | return err; | |
c146afad | 3605 | } |
a2135011 | 3606 | |
c146afad YZ |
3607 | int btrfs_commit_super(struct btrfs_root *root) |
3608 | { | |
3609 | struct btrfs_trans_handle *trans; | |
a74a4b97 | 3610 | |
c146afad | 3611 | mutex_lock(&root->fs_info->cleaner_mutex); |
24bbcf04 | 3612 | btrfs_run_delayed_iputs(root); |
c146afad | 3613 | mutex_unlock(&root->fs_info->cleaner_mutex); |
9d1a2a3a | 3614 | wake_up_process(root->fs_info->cleaner_kthread); |
c71bf099 YZ |
3615 | |
3616 | /* wait until ongoing cleanup work done */ | |
3617 | down_write(&root->fs_info->cleanup_work_sem); | |
3618 | up_write(&root->fs_info->cleanup_work_sem); | |
3619 | ||
7a7eaa40 | 3620 | trans = btrfs_join_transaction(root); |
3612b495 TI |
3621 | if (IS_ERR(trans)) |
3622 | return PTR_ERR(trans); | |
d52c1bcc | 3623 | return btrfs_commit_transaction(trans, root); |
c146afad YZ |
3624 | } |
3625 | ||
3abdbd78 | 3626 | void close_ctree(struct btrfs_root *root) |
c146afad YZ |
3627 | { |
3628 | struct btrfs_fs_info *fs_info = root->fs_info; | |
3629 | int ret; | |
3630 | ||
3631 | fs_info->closing = 1; | |
3632 | smp_mb(); | |
3633 | ||
803b2f54 SB |
3634 | /* wait for the uuid_scan task to finish */ |
3635 | down(&fs_info->uuid_tree_rescan_sem); | |
3636 | /* avoid complains from lockdep et al., set sem back to initial state */ | |
3637 | up(&fs_info->uuid_tree_rescan_sem); | |
3638 | ||
837d5b6e | 3639 | /* pause restriper - we want to resume on mount */ |
aa1b8cd4 | 3640 | btrfs_pause_balance(fs_info); |
837d5b6e | 3641 | |
8dabb742 SB |
3642 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
3643 | ||
aa1b8cd4 | 3644 | btrfs_scrub_cancel(fs_info); |
4cb5300b CM |
3645 | |
3646 | /* wait for any defraggers to finish */ | |
3647 | wait_event(fs_info->transaction_wait, | |
3648 | (atomic_read(&fs_info->defrag_running) == 0)); | |
3649 | ||
3650 | /* clear out the rbtree of defraggable inodes */ | |
26176e7c | 3651 | btrfs_cleanup_defrag_inodes(fs_info); |
4cb5300b | 3652 | |
21c7e756 MX |
3653 | cancel_work_sync(&fs_info->async_reclaim_work); |
3654 | ||
c146afad | 3655 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
acce952b | 3656 | ret = btrfs_commit_super(root); |
3657 | if (ret) | |
efe120a0 | 3658 | btrfs_err(root->fs_info, "commit super ret %d", ret); |
acce952b | 3659 | } |
3660 | ||
87533c47 | 3661 | if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) |
68ce9682 | 3662 | btrfs_error_commit_super(root); |
0f7d52f4 | 3663 | |
e3029d9f AV |
3664 | kthread_stop(fs_info->transaction_kthread); |
3665 | kthread_stop(fs_info->cleaner_kthread); | |
8929ecfa | 3666 | |
f25784b3 YZ |
3667 | fs_info->closing = 2; |
3668 | smp_mb(); | |
3669 | ||
bcef60f2 AJ |
3670 | btrfs_free_qgroup_config(root->fs_info); |
3671 | ||
963d678b | 3672 | if (percpu_counter_sum(&fs_info->delalloc_bytes)) { |
efe120a0 | 3673 | btrfs_info(root->fs_info, "at unmount delalloc count %lld", |
963d678b | 3674 | percpu_counter_sum(&fs_info->delalloc_bytes)); |
b0c68f8b | 3675 | } |
bcc63abb | 3676 | |
5ac1d209 JM |
3677 | btrfs_sysfs_remove_one(fs_info); |
3678 | ||
faa2dbf0 | 3679 | btrfs_free_fs_roots(fs_info); |
d10c5f31 | 3680 | |
1a4319cc LB |
3681 | btrfs_put_block_group_cache(fs_info); |
3682 | ||
2b1360da JB |
3683 | btrfs_free_block_groups(fs_info); |
3684 | ||
de348ee0 WS |
3685 | /* |
3686 | * we must make sure there is not any read request to | |
3687 | * submit after we stopping all workers. | |
3688 | */ | |
3689 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); | |
96192499 JB |
3690 | btrfs_stop_all_workers(fs_info); |
3691 | ||
13e6c37b | 3692 | free_root_pointers(fs_info, 1); |
9ad6b7bc | 3693 | |
13e6c37b | 3694 | iput(fs_info->btree_inode); |
d6bfde87 | 3695 | |
21adbd5c SB |
3696 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
3697 | if (btrfs_test_opt(root, CHECK_INTEGRITY)) | |
3698 | btrfsic_unmount(root, fs_info->fs_devices); | |
3699 | #endif | |
3700 | ||
dfe25020 | 3701 | btrfs_close_devices(fs_info->fs_devices); |
0b86a832 | 3702 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
b248a415 | 3703 | |
e2d84521 | 3704 | percpu_counter_destroy(&fs_info->dirty_metadata_bytes); |
963d678b | 3705 | percpu_counter_destroy(&fs_info->delalloc_bytes); |
c404e0dc | 3706 | percpu_counter_destroy(&fs_info->bio_counter); |
04160088 | 3707 | bdi_destroy(&fs_info->bdi); |
76dda93c | 3708 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
0b86a832 | 3709 | |
53b381b3 DW |
3710 | btrfs_free_stripe_hash_table(fs_info); |
3711 | ||
1cb048f5 FDBM |
3712 | btrfs_free_block_rsv(root, root->orphan_block_rsv); |
3713 | root->orphan_block_rsv = NULL; | |
eb60ceac CM |
3714 | } |
3715 | ||
b9fab919 CM |
3716 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
3717 | int atomic) | |
5f39d397 | 3718 | { |
1259ab75 | 3719 | int ret; |
727011e0 | 3720 | struct inode *btree_inode = buf->pages[0]->mapping->host; |
1259ab75 | 3721 | |
0b32f4bb | 3722 | ret = extent_buffer_uptodate(buf); |
1259ab75 CM |
3723 | if (!ret) |
3724 | return ret; | |
3725 | ||
3726 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, | |
b9fab919 CM |
3727 | parent_transid, atomic); |
3728 | if (ret == -EAGAIN) | |
3729 | return ret; | |
1259ab75 | 3730 | return !ret; |
5f39d397 CM |
3731 | } |
3732 | ||
3733 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) | |
ccd467d6 | 3734 | { |
0b32f4bb | 3735 | return set_extent_buffer_uptodate(buf); |
5f39d397 | 3736 | } |
6702ed49 | 3737 | |
5f39d397 CM |
3738 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
3739 | { | |
06ea65a3 | 3740 | struct btrfs_root *root; |
5f39d397 | 3741 | u64 transid = btrfs_header_generation(buf); |
b9473439 | 3742 | int was_dirty; |
b4ce94de | 3743 | |
06ea65a3 JB |
3744 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
3745 | /* | |
3746 | * This is a fast path so only do this check if we have sanity tests | |
3747 | * enabled. Normal people shouldn't be marking dummy buffers as dirty | |
3748 | * outside of the sanity tests. | |
3749 | */ | |
3750 | if (unlikely(test_bit(EXTENT_BUFFER_DUMMY, &buf->bflags))) | |
3751 | return; | |
3752 | #endif | |
3753 | root = BTRFS_I(buf->pages[0]->mapping->host)->root; | |
b9447ef8 | 3754 | btrfs_assert_tree_locked(buf); |
31b1a2bd JL |
3755 | if (transid != root->fs_info->generation) |
3756 | WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " | |
d397712b | 3757 | "found %llu running %llu\n", |
c1c9ff7c | 3758 | buf->start, transid, root->fs_info->generation); |
0b32f4bb | 3759 | was_dirty = set_extent_buffer_dirty(buf); |
e2d84521 MX |
3760 | if (!was_dirty) |
3761 | __percpu_counter_add(&root->fs_info->dirty_metadata_bytes, | |
3762 | buf->len, | |
3763 | root->fs_info->dirty_metadata_batch); | |
1f21ef0a FM |
3764 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
3765 | if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) { | |
3766 | btrfs_print_leaf(root, buf); | |
3767 | ASSERT(0); | |
3768 | } | |
3769 | #endif | |
eb60ceac CM |
3770 | } |
3771 | ||
b53d3f5d LB |
3772 | static void __btrfs_btree_balance_dirty(struct btrfs_root *root, |
3773 | int flush_delayed) | |
16cdcec7 MX |
3774 | { |
3775 | /* | |
3776 | * looks as though older kernels can get into trouble with | |
3777 | * this code, they end up stuck in balance_dirty_pages forever | |
3778 | */ | |
e2d84521 | 3779 | int ret; |
16cdcec7 MX |
3780 | |
3781 | if (current->flags & PF_MEMALLOC) | |
3782 | return; | |
3783 | ||
b53d3f5d LB |
3784 | if (flush_delayed) |
3785 | btrfs_balance_delayed_items(root); | |
16cdcec7 | 3786 | |
e2d84521 MX |
3787 | ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes, |
3788 | BTRFS_DIRTY_METADATA_THRESH); | |
3789 | if (ret > 0) { | |
d0e1d66b NJ |
3790 | balance_dirty_pages_ratelimited( |
3791 | root->fs_info->btree_inode->i_mapping); | |
16cdcec7 MX |
3792 | } |
3793 | return; | |
3794 | } | |
3795 | ||
b53d3f5d | 3796 | void btrfs_btree_balance_dirty(struct btrfs_root *root) |
35b7e476 | 3797 | { |
b53d3f5d LB |
3798 | __btrfs_btree_balance_dirty(root, 1); |
3799 | } | |
585ad2c3 | 3800 | |
b53d3f5d LB |
3801 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) |
3802 | { | |
3803 | __btrfs_btree_balance_dirty(root, 0); | |
35b7e476 | 3804 | } |
6b80053d | 3805 | |
ca7a79ad | 3806 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
6b80053d | 3807 | { |
727011e0 | 3808 | struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; |
0b32f4bb | 3809 | return btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
6b80053d | 3810 | } |
0da5468f | 3811 | |
fcd1f065 | 3812 | static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
acce952b | 3813 | int read_only) |
3814 | { | |
1104a885 DS |
3815 | /* |
3816 | * Placeholder for checks | |
3817 | */ | |
fcd1f065 | 3818 | return 0; |
acce952b | 3819 | } |
3820 | ||
48a3b636 | 3821 | static void btrfs_error_commit_super(struct btrfs_root *root) |
acce952b | 3822 | { |
acce952b | 3823 | mutex_lock(&root->fs_info->cleaner_mutex); |
3824 | btrfs_run_delayed_iputs(root); | |
3825 | mutex_unlock(&root->fs_info->cleaner_mutex); | |
3826 | ||
3827 | down_write(&root->fs_info->cleanup_work_sem); | |
3828 | up_write(&root->fs_info->cleanup_work_sem); | |
3829 | ||
3830 | /* cleanup FS via transaction */ | |
3831 | btrfs_cleanup_transaction(root); | |
acce952b | 3832 | } |
3833 | ||
143bede5 | 3834 | static void btrfs_destroy_ordered_extents(struct btrfs_root *root) |
acce952b | 3835 | { |
acce952b | 3836 | struct btrfs_ordered_extent *ordered; |
acce952b | 3837 | |
199c2a9c | 3838 | spin_lock(&root->ordered_extent_lock); |
779880ef JB |
3839 | /* |
3840 | * This will just short circuit the ordered completion stuff which will | |
3841 | * make sure the ordered extent gets properly cleaned up. | |
3842 | */ | |
199c2a9c | 3843 | list_for_each_entry(ordered, &root->ordered_extents, |
779880ef JB |
3844 | root_extent_list) |
3845 | set_bit(BTRFS_ORDERED_IOERR, &ordered->flags); | |
199c2a9c MX |
3846 | spin_unlock(&root->ordered_extent_lock); |
3847 | } | |
3848 | ||
3849 | static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info) | |
3850 | { | |
3851 | struct btrfs_root *root; | |
3852 | struct list_head splice; | |
3853 | ||
3854 | INIT_LIST_HEAD(&splice); | |
3855 | ||
3856 | spin_lock(&fs_info->ordered_root_lock); | |
3857 | list_splice_init(&fs_info->ordered_roots, &splice); | |
3858 | while (!list_empty(&splice)) { | |
3859 | root = list_first_entry(&splice, struct btrfs_root, | |
3860 | ordered_root); | |
1de2cfde JB |
3861 | list_move_tail(&root->ordered_root, |
3862 | &fs_info->ordered_roots); | |
199c2a9c | 3863 | |
2a85d9ca | 3864 | spin_unlock(&fs_info->ordered_root_lock); |
199c2a9c MX |
3865 | btrfs_destroy_ordered_extents(root); |
3866 | ||
2a85d9ca LB |
3867 | cond_resched(); |
3868 | spin_lock(&fs_info->ordered_root_lock); | |
199c2a9c MX |
3869 | } |
3870 | spin_unlock(&fs_info->ordered_root_lock); | |
acce952b | 3871 | } |
3872 | ||
35a3621b SB |
3873 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
3874 | struct btrfs_root *root) | |
acce952b | 3875 | { |
3876 | struct rb_node *node; | |
3877 | struct btrfs_delayed_ref_root *delayed_refs; | |
3878 | struct btrfs_delayed_ref_node *ref; | |
3879 | int ret = 0; | |
3880 | ||
3881 | delayed_refs = &trans->delayed_refs; | |
3882 | ||
3883 | spin_lock(&delayed_refs->lock); | |
d7df2c79 | 3884 | if (atomic_read(&delayed_refs->num_entries) == 0) { |
cfece4db | 3885 | spin_unlock(&delayed_refs->lock); |
efe120a0 | 3886 | btrfs_info(root->fs_info, "delayed_refs has NO entry"); |
acce952b | 3887 | return ret; |
3888 | } | |
3889 | ||
d7df2c79 JB |
3890 | while ((node = rb_first(&delayed_refs->href_root)) != NULL) { |
3891 | struct btrfs_delayed_ref_head *head; | |
e78417d1 | 3892 | bool pin_bytes = false; |
acce952b | 3893 | |
d7df2c79 JB |
3894 | head = rb_entry(node, struct btrfs_delayed_ref_head, |
3895 | href_node); | |
3896 | if (!mutex_trylock(&head->mutex)) { | |
3897 | atomic_inc(&head->node.refs); | |
3898 | spin_unlock(&delayed_refs->lock); | |
eb12db69 | 3899 | |
d7df2c79 | 3900 | mutex_lock(&head->mutex); |
e78417d1 | 3901 | mutex_unlock(&head->mutex); |
d7df2c79 JB |
3902 | btrfs_put_delayed_ref(&head->node); |
3903 | spin_lock(&delayed_refs->lock); | |
3904 | continue; | |
3905 | } | |
3906 | spin_lock(&head->lock); | |
3907 | while ((node = rb_first(&head->ref_root)) != NULL) { | |
3908 | ref = rb_entry(node, struct btrfs_delayed_ref_node, | |
3909 | rb_node); | |
3910 | ref->in_tree = 0; | |
3911 | rb_erase(&ref->rb_node, &head->ref_root); | |
3912 | atomic_dec(&delayed_refs->num_entries); | |
3913 | btrfs_put_delayed_ref(ref); | |
e78417d1 | 3914 | } |
d7df2c79 JB |
3915 | if (head->must_insert_reserved) |
3916 | pin_bytes = true; | |
3917 | btrfs_free_delayed_extent_op(head->extent_op); | |
3918 | delayed_refs->num_heads--; | |
3919 | if (head->processing == 0) | |
3920 | delayed_refs->num_heads_ready--; | |
3921 | atomic_dec(&delayed_refs->num_entries); | |
3922 | head->node.in_tree = 0; | |
3923 | rb_erase(&head->href_node, &delayed_refs->href_root); | |
3924 | spin_unlock(&head->lock); | |
3925 | spin_unlock(&delayed_refs->lock); | |
3926 | mutex_unlock(&head->mutex); | |
acce952b | 3927 | |
d7df2c79 JB |
3928 | if (pin_bytes) |
3929 | btrfs_pin_extent(root, head->node.bytenr, | |
3930 | head->node.num_bytes, 1); | |
3931 | btrfs_put_delayed_ref(&head->node); | |
acce952b | 3932 | cond_resched(); |
3933 | spin_lock(&delayed_refs->lock); | |
3934 | } | |
3935 | ||
3936 | spin_unlock(&delayed_refs->lock); | |
3937 | ||
3938 | return ret; | |
3939 | } | |
3940 | ||
143bede5 | 3941 | static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
acce952b | 3942 | { |
3943 | struct btrfs_inode *btrfs_inode; | |
3944 | struct list_head splice; | |
3945 | ||
3946 | INIT_LIST_HEAD(&splice); | |
3947 | ||
eb73c1b7 MX |
3948 | spin_lock(&root->delalloc_lock); |
3949 | list_splice_init(&root->delalloc_inodes, &splice); | |
acce952b | 3950 | |
3951 | while (!list_empty(&splice)) { | |
eb73c1b7 MX |
3952 | btrfs_inode = list_first_entry(&splice, struct btrfs_inode, |
3953 | delalloc_inodes); | |
acce952b | 3954 | |
3955 | list_del_init(&btrfs_inode->delalloc_inodes); | |
df0af1a5 MX |
3956 | clear_bit(BTRFS_INODE_IN_DELALLOC_LIST, |
3957 | &btrfs_inode->runtime_flags); | |
eb73c1b7 | 3958 | spin_unlock(&root->delalloc_lock); |
acce952b | 3959 | |
3960 | btrfs_invalidate_inodes(btrfs_inode->root); | |
b216cbfb | 3961 | |
eb73c1b7 | 3962 | spin_lock(&root->delalloc_lock); |
acce952b | 3963 | } |
3964 | ||
eb73c1b7 MX |
3965 | spin_unlock(&root->delalloc_lock); |
3966 | } | |
3967 | ||
3968 | static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info) | |
3969 | { | |
3970 | struct btrfs_root *root; | |
3971 | struct list_head splice; | |
3972 | ||
3973 | INIT_LIST_HEAD(&splice); | |
3974 | ||
3975 | spin_lock(&fs_info->delalloc_root_lock); | |
3976 | list_splice_init(&fs_info->delalloc_roots, &splice); | |
3977 | while (!list_empty(&splice)) { | |
3978 | root = list_first_entry(&splice, struct btrfs_root, | |
3979 | delalloc_root); | |
3980 | list_del_init(&root->delalloc_root); | |
3981 | root = btrfs_grab_fs_root(root); | |
3982 | BUG_ON(!root); | |
3983 | spin_unlock(&fs_info->delalloc_root_lock); | |
3984 | ||
3985 | btrfs_destroy_delalloc_inodes(root); | |
3986 | btrfs_put_fs_root(root); | |
3987 | ||
3988 | spin_lock(&fs_info->delalloc_root_lock); | |
3989 | } | |
3990 | spin_unlock(&fs_info->delalloc_root_lock); | |
acce952b | 3991 | } |
3992 | ||
3993 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, | |
3994 | struct extent_io_tree *dirty_pages, | |
3995 | int mark) | |
3996 | { | |
3997 | int ret; | |
acce952b | 3998 | struct extent_buffer *eb; |
3999 | u64 start = 0; | |
4000 | u64 end; | |
acce952b | 4001 | |
4002 | while (1) { | |
4003 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, | |
e6138876 | 4004 | mark, NULL); |
acce952b | 4005 | if (ret) |
4006 | break; | |
4007 | ||
4008 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); | |
4009 | while (start <= end) { | |
fd8b2b61 JB |
4010 | eb = btrfs_find_tree_block(root, start, |
4011 | root->leafsize); | |
69a85bd8 | 4012 | start += root->leafsize; |
fd8b2b61 | 4013 | if (!eb) |
acce952b | 4014 | continue; |
fd8b2b61 | 4015 | wait_on_extent_buffer_writeback(eb); |
acce952b | 4016 | |
fd8b2b61 JB |
4017 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
4018 | &eb->bflags)) | |
4019 | clear_extent_buffer_dirty(eb); | |
4020 | free_extent_buffer_stale(eb); | |
acce952b | 4021 | } |
4022 | } | |
4023 | ||
4024 | return ret; | |
4025 | } | |
4026 | ||
4027 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, | |
4028 | struct extent_io_tree *pinned_extents) | |
4029 | { | |
4030 | struct extent_io_tree *unpin; | |
4031 | u64 start; | |
4032 | u64 end; | |
4033 | int ret; | |
ed0eaa14 | 4034 | bool loop = true; |
acce952b | 4035 | |
4036 | unpin = pinned_extents; | |
ed0eaa14 | 4037 | again: |
acce952b | 4038 | while (1) { |
4039 | ret = find_first_extent_bit(unpin, 0, &start, &end, | |
e6138876 | 4040 | EXTENT_DIRTY, NULL); |
acce952b | 4041 | if (ret) |
4042 | break; | |
4043 | ||
4044 | /* opt_discard */ | |
5378e607 LD |
4045 | if (btrfs_test_opt(root, DISCARD)) |
4046 | ret = btrfs_error_discard_extent(root, start, | |
4047 | end + 1 - start, | |
4048 | NULL); | |
acce952b | 4049 | |
4050 | clear_extent_dirty(unpin, start, end, GFP_NOFS); | |
4051 | btrfs_error_unpin_extent_range(root, start, end); | |
4052 | cond_resched(); | |
4053 | } | |
4054 | ||
ed0eaa14 LB |
4055 | if (loop) { |
4056 | if (unpin == &root->fs_info->freed_extents[0]) | |
4057 | unpin = &root->fs_info->freed_extents[1]; | |
4058 | else | |
4059 | unpin = &root->fs_info->freed_extents[0]; | |
4060 | loop = false; | |
4061 | goto again; | |
4062 | } | |
4063 | ||
acce952b | 4064 | return 0; |
4065 | } | |
4066 | ||
49b25e05 JM |
4067 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans, |
4068 | struct btrfs_root *root) | |
4069 | { | |
4070 | btrfs_destroy_delayed_refs(cur_trans, root); | |
49b25e05 | 4071 | |
4a9d8bde | 4072 | cur_trans->state = TRANS_STATE_COMMIT_START; |
d7096fc3 | 4073 | wake_up(&root->fs_info->transaction_blocked_wait); |
49b25e05 | 4074 | |
4a9d8bde | 4075 | cur_trans->state = TRANS_STATE_UNBLOCKED; |
d7096fc3 | 4076 | wake_up(&root->fs_info->transaction_wait); |
49b25e05 | 4077 | |
67cde344 MX |
4078 | btrfs_destroy_delayed_inodes(root); |
4079 | btrfs_assert_delayed_root_empty(root); | |
49b25e05 | 4080 | |
49b25e05 JM |
4081 | btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages, |
4082 | EXTENT_DIRTY); | |
6e841e32 LB |
4083 | btrfs_destroy_pinned_extent(root, |
4084 | root->fs_info->pinned_extents); | |
49b25e05 | 4085 | |
4a9d8bde MX |
4086 | cur_trans->state =TRANS_STATE_COMPLETED; |
4087 | wake_up(&cur_trans->commit_wait); | |
4088 | ||
49b25e05 JM |
4089 | /* |
4090 | memset(cur_trans, 0, sizeof(*cur_trans)); | |
4091 | kmem_cache_free(btrfs_transaction_cachep, cur_trans); | |
4092 | */ | |
4093 | } | |
4094 | ||
48a3b636 | 4095 | static int btrfs_cleanup_transaction(struct btrfs_root *root) |
acce952b | 4096 | { |
4097 | struct btrfs_transaction *t; | |
acce952b | 4098 | |
acce952b | 4099 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
4100 | ||
a4abeea4 | 4101 | spin_lock(&root->fs_info->trans_lock); |
724e2315 JB |
4102 | while (!list_empty(&root->fs_info->trans_list)) { |
4103 | t = list_first_entry(&root->fs_info->trans_list, | |
4104 | struct btrfs_transaction, list); | |
4105 | if (t->state >= TRANS_STATE_COMMIT_START) { | |
4106 | atomic_inc(&t->use_count); | |
4107 | spin_unlock(&root->fs_info->trans_lock); | |
4108 | btrfs_wait_for_commit(root, t->transid); | |
4109 | btrfs_put_transaction(t); | |
4110 | spin_lock(&root->fs_info->trans_lock); | |
4111 | continue; | |
4112 | } | |
4113 | if (t == root->fs_info->running_transaction) { | |
4114 | t->state = TRANS_STATE_COMMIT_DOING; | |
4115 | spin_unlock(&root->fs_info->trans_lock); | |
4116 | /* | |
4117 | * We wait for 0 num_writers since we don't hold a trans | |
4118 | * handle open currently for this transaction. | |
4119 | */ | |
4120 | wait_event(t->writer_wait, | |
4121 | atomic_read(&t->num_writers) == 0); | |
4122 | } else { | |
4123 | spin_unlock(&root->fs_info->trans_lock); | |
4124 | } | |
4125 | btrfs_cleanup_one_transaction(t, root); | |
4a9d8bde | 4126 | |
724e2315 JB |
4127 | spin_lock(&root->fs_info->trans_lock); |
4128 | if (t == root->fs_info->running_transaction) | |
4129 | root->fs_info->running_transaction = NULL; | |
acce952b | 4130 | list_del_init(&t->list); |
724e2315 | 4131 | spin_unlock(&root->fs_info->trans_lock); |
acce952b | 4132 | |
724e2315 JB |
4133 | btrfs_put_transaction(t); |
4134 | trace_btrfs_transaction_commit(root); | |
4135 | spin_lock(&root->fs_info->trans_lock); | |
4136 | } | |
4137 | spin_unlock(&root->fs_info->trans_lock); | |
4138 | btrfs_destroy_all_ordered_extents(root->fs_info); | |
4139 | btrfs_destroy_delayed_inodes(root); | |
4140 | btrfs_assert_delayed_root_empty(root); | |
4141 | btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents); | |
4142 | btrfs_destroy_all_delalloc_inodes(root->fs_info); | |
acce952b | 4143 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
acce952b | 4144 | |
4145 | return 0; | |
4146 | } | |
4147 | ||
d1310b2e | 4148 | static struct extent_io_ops btree_extent_io_ops = { |
ce9adaa5 | 4149 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
4bb31e92 | 4150 | .readpage_io_failed_hook = btree_io_failed_hook, |
0b86a832 | 4151 | .submit_bio_hook = btree_submit_bio_hook, |
239b14b3 CM |
4152 | /* note we're sharing with inode.c for the merge bio hook */ |
4153 | .merge_bio_hook = btrfs_merge_bio_hook, | |
0da5468f | 4154 | }; |