Commit | Line | Data |
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c1d7c514 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6cbd5570 CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
6cbd5570 CM |
4 | */ |
5 | ||
886322e8 | 6 | #include <linux/err.h> |
8ea05e3a | 7 | #include <linux/uuid.h> |
3768f368 | 8 | #include "ctree.h" |
5eda7b5e | 9 | #include "transaction.h" |
3768f368 CM |
10 | #include "disk-io.h" |
11 | #include "print-tree.h" | |
12 | ||
8ea05e3a AB |
13 | /* |
14 | * Read a root item from the tree. In case we detect a root item smaller then | |
15 | * sizeof(root_item), we know it's an old version of the root structure and | |
16 | * initialize all new fields to zero. The same happens if we detect mismatching | |
17 | * generation numbers as then we know the root was once mounted with an older | |
18 | * kernel that was not aware of the root item structure change. | |
19 | */ | |
171170c1 ST |
20 | static void btrfs_read_root_item(struct extent_buffer *eb, int slot, |
21 | struct btrfs_root_item *item) | |
8ea05e3a AB |
22 | { |
23 | uuid_le uuid; | |
f65e25e3 | 24 | u32 len; |
8ea05e3a AB |
25 | int need_reset = 0; |
26 | ||
27 | len = btrfs_item_size_nr(eb, slot); | |
28 | read_extent_buffer(eb, item, btrfs_item_ptr_offset(eb, slot), | |
f65e25e3 | 29 | min_t(u32, len, sizeof(*item))); |
8ea05e3a AB |
30 | if (len < sizeof(*item)) |
31 | need_reset = 1; | |
32 | if (!need_reset && btrfs_root_generation(item) | |
33 | != btrfs_root_generation_v2(item)) { | |
34 | if (btrfs_root_generation_v2(item) != 0) { | |
f14d104d | 35 | btrfs_warn(eb->fs_info, |
5d163e0e | 36 | "mismatching generation and generation_v2 found in root item. This root was probably mounted with an older kernel. Resetting all new fields."); |
8ea05e3a AB |
37 | } |
38 | need_reset = 1; | |
39 | } | |
40 | if (need_reset) { | |
41 | memset(&item->generation_v2, 0, | |
42 | sizeof(*item) - offsetof(struct btrfs_root_item, | |
43 | generation_v2)); | |
44 | ||
45 | uuid_le_gen(&uuid); | |
46 | memcpy(item->uuid, uuid.b, BTRFS_UUID_SIZE); | |
47 | } | |
48 | } | |
49 | ||
d352ac68 | 50 | /* |
cb517eab MX |
51 | * btrfs_find_root - lookup the root by the key. |
52 | * root: the root of the root tree | |
53 | * search_key: the key to search | |
54 | * path: the path we search | |
55 | * root_item: the root item of the tree we look for | |
01327610 | 56 | * root_key: the root key of the tree we look for |
cb517eab | 57 | * |
01327610 | 58 | * If ->offset of 'search_key' is -1ULL, it means we are not sure the offset |
cb517eab MX |
59 | * of the search key, just lookup the root with the highest offset for a |
60 | * given objectid. | |
61 | * | |
62 | * If we find something return 0, otherwise > 0, < 0 on error. | |
d352ac68 | 63 | */ |
310712b2 | 64 | int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, |
cb517eab MX |
65 | struct btrfs_path *path, struct btrfs_root_item *root_item, |
66 | struct btrfs_key *root_key) | |
3768f368 | 67 | { |
5f39d397 CM |
68 | struct btrfs_key found_key; |
69 | struct extent_buffer *l; | |
3768f368 CM |
70 | int ret; |
71 | int slot; | |
72 | ||
cb517eab | 73 | ret = btrfs_search_slot(NULL, root, search_key, path, 0, 0); |
3768f368 | 74 | if (ret < 0) |
cb517eab | 75 | return ret; |
5f39d397 | 76 | |
cb517eab MX |
77 | if (search_key->offset != -1ULL) { /* the search key is exact */ |
78 | if (ret > 0) | |
79 | goto out; | |
80 | } else { | |
81 | BUG_ON(ret == 0); /* Logical error */ | |
82 | if (path->slots[0] == 0) | |
83 | goto out; | |
84 | path->slots[0]--; | |
85 | ret = 0; | |
76dda93c | 86 | } |
cb517eab | 87 | |
5f39d397 | 88 | l = path->nodes[0]; |
cb517eab MX |
89 | slot = path->slots[0]; |
90 | ||
5f39d397 | 91 | btrfs_item_key_to_cpu(l, &found_key, slot); |
cb517eab | 92 | if (found_key.objectid != search_key->objectid || |
76dda93c | 93 | found_key.type != BTRFS_ROOT_ITEM_KEY) { |
3768f368 CM |
94 | ret = 1; |
95 | goto out; | |
96 | } | |
8ea05e3a | 97 | |
cb517eab MX |
98 | if (root_item) |
99 | btrfs_read_root_item(l, slot, root_item); | |
100 | if (root_key) | |
101 | memcpy(root_key, &found_key, sizeof(found_key)); | |
3768f368 | 102 | out: |
cb517eab | 103 | btrfs_release_path(path); |
3768f368 CM |
104 | return ret; |
105 | } | |
106 | ||
bf5f32ec MF |
107 | void btrfs_set_root_node(struct btrfs_root_item *item, |
108 | struct extent_buffer *node) | |
5d4f98a2 YZ |
109 | { |
110 | btrfs_set_root_bytenr(item, node->start); | |
111 | btrfs_set_root_level(item, btrfs_header_level(node)); | |
112 | btrfs_set_root_generation(item, btrfs_header_generation(node)); | |
5d4f98a2 YZ |
113 | } |
114 | ||
d352ac68 CM |
115 | /* |
116 | * copy the data in 'item' into the btree | |
117 | */ | |
e089f05c CM |
118 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
119 | *root, struct btrfs_key *key, struct btrfs_root_item | |
120 | *item) | |
3768f368 | 121 | { |
0b246afa | 122 | struct btrfs_fs_info *fs_info = root->fs_info; |
5caf2a00 | 123 | struct btrfs_path *path; |
5f39d397 | 124 | struct extent_buffer *l; |
3768f368 CM |
125 | int ret; |
126 | int slot; | |
5f39d397 | 127 | unsigned long ptr; |
0412e58c | 128 | u32 old_len; |
3768f368 | 129 | |
5caf2a00 | 130 | path = btrfs_alloc_path(); |
b45a9d8b JM |
131 | if (!path) |
132 | return -ENOMEM; | |
133 | ||
5caf2a00 | 134 | ret = btrfs_search_slot(trans, root, key, path, 0, 1); |
005d6427 | 135 | if (ret < 0) { |
66642832 | 136 | btrfs_abort_transaction(trans, ret); |
005d6427 DS |
137 | goto out; |
138 | } | |
d6667462 CM |
139 | |
140 | if (ret != 0) { | |
a4f78750 | 141 | btrfs_print_leaf(path->nodes[0]); |
0b246afa | 142 | btrfs_crit(fs_info, "unable to update root key %llu %u %llu", |
5d163e0e | 143 | key->objectid, key->type, key->offset); |
d6667462 CM |
144 | BUG_ON(1); |
145 | } | |
146 | ||
5f39d397 | 147 | l = path->nodes[0]; |
5caf2a00 | 148 | slot = path->slots[0]; |
5f39d397 | 149 | ptr = btrfs_item_ptr_offset(l, slot); |
8ea05e3a AB |
150 | old_len = btrfs_item_size_nr(l, slot); |
151 | ||
152 | /* | |
153 | * If this is the first time we update the root item which originated | |
154 | * from an older kernel, we need to enlarge the item size to make room | |
155 | * for the added fields. | |
156 | */ | |
157 | if (old_len < sizeof(*item)) { | |
158 | btrfs_release_path(path); | |
159 | ret = btrfs_search_slot(trans, root, key, path, | |
160 | -1, 1); | |
005d6427 | 161 | if (ret < 0) { |
66642832 | 162 | btrfs_abort_transaction(trans, ret); |
005d6427 DS |
163 | goto out; |
164 | } | |
165 | ||
8ea05e3a | 166 | ret = btrfs_del_item(trans, root, path); |
005d6427 | 167 | if (ret < 0) { |
66642832 | 168 | btrfs_abort_transaction(trans, ret); |
005d6427 DS |
169 | goto out; |
170 | } | |
8ea05e3a AB |
171 | btrfs_release_path(path); |
172 | ret = btrfs_insert_empty_item(trans, root, path, | |
173 | key, sizeof(*item)); | |
005d6427 | 174 | if (ret < 0) { |
66642832 | 175 | btrfs_abort_transaction(trans, ret); |
005d6427 DS |
176 | goto out; |
177 | } | |
8ea05e3a AB |
178 | l = path->nodes[0]; |
179 | slot = path->slots[0]; | |
180 | ptr = btrfs_item_ptr_offset(l, slot); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Update generation_v2 so at the next mount we know the new root | |
185 | * fields are valid. | |
186 | */ | |
187 | btrfs_set_root_generation_v2(item, btrfs_root_generation(item)); | |
188 | ||
5f39d397 | 189 | write_extent_buffer(l, item, ptr, sizeof(*item)); |
5caf2a00 | 190 | btrfs_mark_buffer_dirty(path->nodes[0]); |
3768f368 | 191 | out: |
5caf2a00 | 192 | btrfs_free_path(path); |
3768f368 CM |
193 | return ret; |
194 | } | |
195 | ||
d16cb050 | 196 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
310712b2 | 197 | const struct btrfs_key *key, struct btrfs_root_item *item) |
3768f368 | 198 | { |
8ea05e3a AB |
199 | /* |
200 | * Make sure generation v1 and v2 match. See update_root for details. | |
201 | */ | |
202 | btrfs_set_root_generation_v2(item, btrfs_root_generation(item)); | |
d16cb050 | 203 | return btrfs_insert_item(trans, root, key, item, sizeof(*item)); |
3768f368 CM |
204 | } |
205 | ||
6bccf3ab | 206 | int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info) |
76dda93c | 207 | { |
6bccf3ab | 208 | struct btrfs_root *tree_root = fs_info->tree_root; |
76dda93c YZ |
209 | struct extent_buffer *leaf; |
210 | struct btrfs_path *path; | |
211 | struct btrfs_key key; | |
d68fc57b YZ |
212 | struct btrfs_key root_key; |
213 | struct btrfs_root *root; | |
76dda93c YZ |
214 | int err = 0; |
215 | int ret; | |
216 | ||
217 | path = btrfs_alloc_path(); | |
218 | if (!path) | |
219 | return -ENOMEM; | |
220 | ||
221 | key.objectid = BTRFS_ORPHAN_OBJECTID; | |
222 | key.type = BTRFS_ORPHAN_ITEM_KEY; | |
223 | key.offset = 0; | |
224 | ||
d68fc57b YZ |
225 | root_key.type = BTRFS_ROOT_ITEM_KEY; |
226 | root_key.offset = (u64)-1; | |
227 | ||
76dda93c YZ |
228 | while (1) { |
229 | ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0); | |
230 | if (ret < 0) { | |
231 | err = ret; | |
232 | break; | |
233 | } | |
234 | ||
235 | leaf = path->nodes[0]; | |
236 | if (path->slots[0] >= btrfs_header_nritems(leaf)) { | |
237 | ret = btrfs_next_leaf(tree_root, path); | |
238 | if (ret < 0) | |
239 | err = ret; | |
240 | if (ret != 0) | |
241 | break; | |
242 | leaf = path->nodes[0]; | |
243 | } | |
244 | ||
245 | btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); | |
b3b4aa74 | 246 | btrfs_release_path(path); |
76dda93c YZ |
247 | |
248 | if (key.objectid != BTRFS_ORPHAN_OBJECTID || | |
249 | key.type != BTRFS_ORPHAN_ITEM_KEY) | |
250 | break; | |
251 | ||
d68fc57b YZ |
252 | root_key.objectid = key.offset; |
253 | key.offset++; | |
254 | ||
35bbb97f JM |
255 | /* |
256 | * The root might have been inserted already, as before we look | |
257 | * for orphan roots, log replay might have happened, which | |
258 | * triggers a transaction commit and qgroup accounting, which | |
259 | * in turn reads and inserts fs roots while doing backref | |
260 | * walking. | |
261 | */ | |
0b246afa | 262 | root = btrfs_lookup_fs_root(fs_info, root_key.objectid); |
35bbb97f JM |
263 | if (root) { |
264 | WARN_ON(!test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, | |
265 | &root->state)); | |
78c52d9e JB |
266 | if (btrfs_root_refs(&root->root_item) == 0) { |
267 | set_bit(BTRFS_ROOT_DEAD_TREE, &root->state); | |
35bbb97f | 268 | btrfs_add_dead_root(root); |
78c52d9e | 269 | } |
35bbb97f JM |
270 | continue; |
271 | } | |
272 | ||
cb517eab | 273 | root = btrfs_read_fs_root(tree_root, &root_key); |
886322e8 | 274 | err = PTR_ERR_OR_ZERO(root); |
68a7342c | 275 | if (err && err != -ENOENT) { |
cb517eab | 276 | break; |
68a7342c JB |
277 | } else if (err == -ENOENT) { |
278 | struct btrfs_trans_handle *trans; | |
279 | ||
280 | btrfs_release_path(path); | |
281 | ||
282 | trans = btrfs_join_transaction(tree_root); | |
283 | if (IS_ERR(trans)) { | |
284 | err = PTR_ERR(trans); | |
0b246afa | 285 | btrfs_handle_fs_error(fs_info, err, |
5d163e0e | 286 | "Failed to start trans to delete orphan item"); |
68a7342c JB |
287 | break; |
288 | } | |
289 | err = btrfs_del_orphan_item(trans, tree_root, | |
290 | root_key.objectid); | |
3a45bb20 | 291 | btrfs_end_transaction(trans); |
68a7342c | 292 | if (err) { |
0b246afa | 293 | btrfs_handle_fs_error(fs_info, err, |
5d163e0e | 294 | "Failed to delete root orphan item"); |
68a7342c JB |
295 | break; |
296 | } | |
297 | continue; | |
cb517eab MX |
298 | } |
299 | ||
cb517eab MX |
300 | err = btrfs_init_fs_root(root); |
301 | if (err) { | |
302 | btrfs_free_fs_root(root); | |
76dda93c YZ |
303 | break; |
304 | } | |
305 | ||
27cdeb70 | 306 | set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state); |
cb517eab | 307 | |
0b246afa | 308 | err = btrfs_insert_fs_root(fs_info, root); |
cb517eab | 309 | if (err) { |
35bbb97f | 310 | BUG_ON(err == -EEXIST); |
cb517eab | 311 | btrfs_free_fs_root(root); |
d68fc57b YZ |
312 | break; |
313 | } | |
14927d95 | 314 | |
78c52d9e JB |
315 | if (btrfs_root_refs(&root->root_item) == 0) { |
316 | set_bit(BTRFS_ROOT_DEAD_TREE, &root->state); | |
14927d95 | 317 | btrfs_add_dead_root(root); |
78c52d9e | 318 | } |
76dda93c YZ |
319 | } |
320 | ||
321 | btrfs_free_path(path); | |
322 | return err; | |
323 | } | |
324 | ||
1cd5447e JM |
325 | /* drop the root item for 'key' from the tree root */ |
326 | int btrfs_del_root(struct btrfs_trans_handle *trans, | |
ab9ce7d4 | 327 | const struct btrfs_key *key) |
3768f368 | 328 | { |
ab9ce7d4 | 329 | struct btrfs_root *root = trans->fs_info->tree_root; |
5caf2a00 | 330 | struct btrfs_path *path; |
3768f368 CM |
331 | int ret; |
332 | ||
5caf2a00 | 333 | path = btrfs_alloc_path(); |
db5b493a TI |
334 | if (!path) |
335 | return -ENOMEM; | |
5caf2a00 | 336 | ret = btrfs_search_slot(trans, root, key, path, -1, 1); |
3768f368 CM |
337 | if (ret < 0) |
338 | goto out; | |
edbd8d4e | 339 | |
3768f368 | 340 | BUG_ON(ret != 0); |
c5739bba | 341 | |
5eda7b5e | 342 | ret = btrfs_del_item(trans, root, path); |
3768f368 | 343 | out: |
5caf2a00 | 344 | btrfs_free_path(path); |
3768f368 CM |
345 | return ret; |
346 | } | |
0660b5af | 347 | |
3ee1c553 LF |
348 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, |
349 | u64 ref_id, u64 dirid, u64 *sequence, const char *name, | |
350 | int name_len) | |
4df27c4d | 351 | |
0660b5af | 352 | { |
3ee1c553 | 353 | struct btrfs_root *tree_root = trans->fs_info->tree_root; |
4df27c4d YZ |
354 | struct btrfs_path *path; |
355 | struct btrfs_root_ref *ref; | |
356 | struct extent_buffer *leaf; | |
0660b5af | 357 | struct btrfs_key key; |
4df27c4d YZ |
358 | unsigned long ptr; |
359 | int err = 0; | |
0660b5af | 360 | int ret; |
0660b5af CM |
361 | |
362 | path = btrfs_alloc_path(); | |
4df27c4d YZ |
363 | if (!path) |
364 | return -ENOMEM; | |
0660b5af CM |
365 | |
366 | key.objectid = root_id; | |
4df27c4d | 367 | key.type = BTRFS_ROOT_BACKREF_KEY; |
0660b5af | 368 | key.offset = ref_id; |
4df27c4d | 369 | again: |
0660b5af | 370 | ret = btrfs_search_slot(trans, tree_root, &key, path, -1, 1); |
4df27c4d YZ |
371 | BUG_ON(ret < 0); |
372 | if (ret == 0) { | |
373 | leaf = path->nodes[0]; | |
374 | ref = btrfs_item_ptr(leaf, path->slots[0], | |
375 | struct btrfs_root_ref); | |
376 | ||
377 | WARN_ON(btrfs_root_ref_dirid(leaf, ref) != dirid); | |
378 | WARN_ON(btrfs_root_ref_name_len(leaf, ref) != name_len); | |
379 | ptr = (unsigned long)(ref + 1); | |
380 | WARN_ON(memcmp_extent_buffer(leaf, name, ptr, name_len)); | |
381 | *sequence = btrfs_root_ref_sequence(leaf, ref); | |
382 | ||
383 | ret = btrfs_del_item(trans, tree_root, path); | |
65a246c5 TI |
384 | if (ret) { |
385 | err = ret; | |
386 | goto out; | |
387 | } | |
4df27c4d YZ |
388 | } else |
389 | err = -ENOENT; | |
390 | ||
391 | if (key.type == BTRFS_ROOT_BACKREF_KEY) { | |
b3b4aa74 | 392 | btrfs_release_path(path); |
4df27c4d YZ |
393 | key.objectid = ref_id; |
394 | key.type = BTRFS_ROOT_REF_KEY; | |
395 | key.offset = root_id; | |
396 | goto again; | |
397 | } | |
0660b5af | 398 | |
65a246c5 | 399 | out: |
0660b5af | 400 | btrfs_free_path(path); |
4df27c4d | 401 | return err; |
0660b5af CM |
402 | } |
403 | ||
404 | /* | |
405 | * add a btrfs_root_ref item. type is either BTRFS_ROOT_REF_KEY | |
406 | * or BTRFS_ROOT_BACKREF_KEY. | |
407 | * | |
408 | * The dirid, sequence, name and name_len refer to the directory entry | |
409 | * that is referencing the root. | |
410 | * | |
411 | * For a forward ref, the root_id is the id of the tree referencing | |
412 | * the root and ref_id is the id of the subvol or snapshot. | |
413 | * | |
414 | * For a back ref the root_id is the id of the subvol or snapshot and | |
415 | * ref_id is the id of the tree referencing it. | |
79787eaa JM |
416 | * |
417 | * Will return 0, -ENOMEM, or anything from the CoW path | |
0660b5af | 418 | */ |
6025c19f LF |
419 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, |
420 | u64 ref_id, u64 dirid, u64 sequence, const char *name, | |
421 | int name_len) | |
0660b5af | 422 | { |
6025c19f | 423 | struct btrfs_root *tree_root = trans->fs_info->tree_root; |
0660b5af CM |
424 | struct btrfs_key key; |
425 | int ret; | |
426 | struct btrfs_path *path; | |
427 | struct btrfs_root_ref *ref; | |
428 | struct extent_buffer *leaf; | |
429 | unsigned long ptr; | |
430 | ||
0660b5af | 431 | path = btrfs_alloc_path(); |
4df27c4d YZ |
432 | if (!path) |
433 | return -ENOMEM; | |
0660b5af CM |
434 | |
435 | key.objectid = root_id; | |
4df27c4d | 436 | key.type = BTRFS_ROOT_BACKREF_KEY; |
0660b5af | 437 | key.offset = ref_id; |
4df27c4d | 438 | again: |
0660b5af CM |
439 | ret = btrfs_insert_empty_item(trans, tree_root, path, &key, |
440 | sizeof(*ref) + name_len); | |
79787eaa | 441 | if (ret) { |
66642832 | 442 | btrfs_abort_transaction(trans, ret); |
79787eaa JM |
443 | btrfs_free_path(path); |
444 | return ret; | |
445 | } | |
0660b5af CM |
446 | |
447 | leaf = path->nodes[0]; | |
448 | ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref); | |
449 | btrfs_set_root_ref_dirid(leaf, ref, dirid); | |
450 | btrfs_set_root_ref_sequence(leaf, ref, sequence); | |
451 | btrfs_set_root_ref_name_len(leaf, ref, name_len); | |
452 | ptr = (unsigned long)(ref + 1); | |
453 | write_extent_buffer(leaf, name, ptr, name_len); | |
454 | btrfs_mark_buffer_dirty(leaf); | |
455 | ||
4df27c4d | 456 | if (key.type == BTRFS_ROOT_BACKREF_KEY) { |
b3b4aa74 | 457 | btrfs_release_path(path); |
4df27c4d YZ |
458 | key.objectid = ref_id; |
459 | key.type = BTRFS_ROOT_REF_KEY; | |
460 | key.offset = root_id; | |
461 | goto again; | |
462 | } | |
463 | ||
0660b5af | 464 | btrfs_free_path(path); |
4df27c4d | 465 | return 0; |
0660b5af | 466 | } |
08fe4db1 LZ |
467 | |
468 | /* | |
469 | * Old btrfs forgets to init root_item->flags and root_item->byte_limit | |
470 | * for subvolumes. To work around this problem, we steal a bit from | |
471 | * root_item->inode_item->flags, and use it to indicate if those fields | |
472 | * have been properly initialized. | |
473 | */ | |
474 | void btrfs_check_and_init_root_item(struct btrfs_root_item *root_item) | |
475 | { | |
3cae210f | 476 | u64 inode_flags = btrfs_stack_inode_flags(&root_item->inode); |
08fe4db1 LZ |
477 | |
478 | if (!(inode_flags & BTRFS_INODE_ROOT_ITEM_INIT)) { | |
479 | inode_flags |= BTRFS_INODE_ROOT_ITEM_INIT; | |
3cae210f QW |
480 | btrfs_set_stack_inode_flags(&root_item->inode, inode_flags); |
481 | btrfs_set_root_flags(root_item, 0); | |
482 | btrfs_set_root_limit(root_item, 0); | |
08fe4db1 LZ |
483 | } |
484 | } | |
8ea05e3a AB |
485 | |
486 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, | |
487 | struct btrfs_root *root) | |
488 | { | |
489 | struct btrfs_root_item *item = &root->root_item; | |
95582b00 | 490 | struct timespec64 ct; |
8ea05e3a | 491 | |
95582b00 | 492 | ktime_get_real_ts64(&ct); |
5f3ab90a | 493 | spin_lock(&root->root_item_lock); |
3cae210f QW |
494 | btrfs_set_root_ctransid(item, trans->transid); |
495 | btrfs_set_stack_timespec_sec(&item->ctime, ct.tv_sec); | |
496 | btrfs_set_stack_timespec_nsec(&item->ctime, ct.tv_nsec); | |
5f3ab90a | 497 | spin_unlock(&root->root_item_lock); |
8ea05e3a | 498 | } |