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c1d7c514 | 1 | // SPDX-License-Identifier: GPL-2.0 |
16cdcec7 MX |
2 | /* |
3 | * Copyright (C) 2011 Fujitsu. All rights reserved. | |
4 | * Written by Miao Xie <miaox@cn.fujitsu.com> | |
16cdcec7 MX |
5 | */ |
6 | ||
7 | #include <linux/slab.h> | |
c7f88c4e | 8 | #include <linux/iversion.h> |
602cbe91 | 9 | #include "misc.h" |
16cdcec7 MX |
10 | #include "delayed-inode.h" |
11 | #include "disk-io.h" | |
12 | #include "transaction.h" | |
3cae210f | 13 | #include "ctree.h" |
4f5427cc | 14 | #include "qgroup.h" |
1f95ec01 | 15 | #include "locking.h" |
16cdcec7 | 16 | |
de3cb945 CM |
17 | #define BTRFS_DELAYED_WRITEBACK 512 |
18 | #define BTRFS_DELAYED_BACKGROUND 128 | |
19 | #define BTRFS_DELAYED_BATCH 16 | |
16cdcec7 MX |
20 | |
21 | static struct kmem_cache *delayed_node_cache; | |
22 | ||
23 | int __init btrfs_delayed_inode_init(void) | |
24 | { | |
837e1972 | 25 | delayed_node_cache = kmem_cache_create("btrfs_delayed_node", |
16cdcec7 MX |
26 | sizeof(struct btrfs_delayed_node), |
27 | 0, | |
fba4b697 | 28 | SLAB_MEM_SPREAD, |
16cdcec7 MX |
29 | NULL); |
30 | if (!delayed_node_cache) | |
31 | return -ENOMEM; | |
32 | return 0; | |
33 | } | |
34 | ||
e67c718b | 35 | void __cold btrfs_delayed_inode_exit(void) |
16cdcec7 | 36 | { |
5598e900 | 37 | kmem_cache_destroy(delayed_node_cache); |
16cdcec7 MX |
38 | } |
39 | ||
40 | static inline void btrfs_init_delayed_node( | |
41 | struct btrfs_delayed_node *delayed_node, | |
42 | struct btrfs_root *root, u64 inode_id) | |
43 | { | |
44 | delayed_node->root = root; | |
45 | delayed_node->inode_id = inode_id; | |
6de5f18e | 46 | refcount_set(&delayed_node->refs, 0); |
03a1d4c8 LB |
47 | delayed_node->ins_root = RB_ROOT_CACHED; |
48 | delayed_node->del_root = RB_ROOT_CACHED; | |
16cdcec7 | 49 | mutex_init(&delayed_node->mutex); |
16cdcec7 MX |
50 | INIT_LIST_HEAD(&delayed_node->n_list); |
51 | INIT_LIST_HEAD(&delayed_node->p_list); | |
16cdcec7 MX |
52 | } |
53 | ||
54 | static inline int btrfs_is_continuous_delayed_item( | |
55 | struct btrfs_delayed_item *item1, | |
56 | struct btrfs_delayed_item *item2) | |
57 | { | |
58 | if (item1->key.type == BTRFS_DIR_INDEX_KEY && | |
59 | item1->key.objectid == item2->key.objectid && | |
60 | item1->key.type == item2->key.type && | |
61 | item1->key.offset + 1 == item2->key.offset) | |
62 | return 1; | |
63 | return 0; | |
64 | } | |
65 | ||
f85b7379 DS |
66 | static struct btrfs_delayed_node *btrfs_get_delayed_node( |
67 | struct btrfs_inode *btrfs_inode) | |
16cdcec7 | 68 | { |
16cdcec7 | 69 | struct btrfs_root *root = btrfs_inode->root; |
4a0cc7ca | 70 | u64 ino = btrfs_ino(btrfs_inode); |
2f7e33d4 | 71 | struct btrfs_delayed_node *node; |
16cdcec7 | 72 | |
20c7bcec | 73 | node = READ_ONCE(btrfs_inode->delayed_node); |
16cdcec7 | 74 | if (node) { |
6de5f18e | 75 | refcount_inc(&node->refs); |
16cdcec7 MX |
76 | return node; |
77 | } | |
78 | ||
79 | spin_lock(&root->inode_lock); | |
0d0ca30f | 80 | node = radix_tree_lookup(&root->delayed_nodes_tree, ino); |
ec35e48b | 81 | |
16cdcec7 MX |
82 | if (node) { |
83 | if (btrfs_inode->delayed_node) { | |
6de5f18e | 84 | refcount_inc(&node->refs); /* can be accessed */ |
2f7e33d4 | 85 | BUG_ON(btrfs_inode->delayed_node != node); |
16cdcec7 | 86 | spin_unlock(&root->inode_lock); |
2f7e33d4 | 87 | return node; |
16cdcec7 | 88 | } |
ec35e48b CM |
89 | |
90 | /* | |
91 | * It's possible that we're racing into the middle of removing | |
92 | * this node from the radix tree. In this case, the refcount | |
93 | * was zero and it should never go back to one. Just return | |
94 | * NULL like it was never in the radix at all; our release | |
95 | * function is in the process of removing it. | |
96 | * | |
97 | * Some implementations of refcount_inc refuse to bump the | |
98 | * refcount once it has hit zero. If we don't do this dance | |
99 | * here, refcount_inc() may decide to just WARN_ONCE() instead | |
100 | * of actually bumping the refcount. | |
101 | * | |
102 | * If this node is properly in the radix, we want to bump the | |
103 | * refcount twice, once for the inode and once for this get | |
104 | * operation. | |
105 | */ | |
106 | if (refcount_inc_not_zero(&node->refs)) { | |
107 | refcount_inc(&node->refs); | |
108 | btrfs_inode->delayed_node = node; | |
109 | } else { | |
110 | node = NULL; | |
111 | } | |
112 | ||
16cdcec7 MX |
113 | spin_unlock(&root->inode_lock); |
114 | return node; | |
115 | } | |
116 | spin_unlock(&root->inode_lock); | |
117 | ||
2f7e33d4 MX |
118 | return NULL; |
119 | } | |
120 | ||
79787eaa | 121 | /* Will return either the node or PTR_ERR(-ENOMEM) */ |
2f7e33d4 | 122 | static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node( |
f85b7379 | 123 | struct btrfs_inode *btrfs_inode) |
2f7e33d4 MX |
124 | { |
125 | struct btrfs_delayed_node *node; | |
2f7e33d4 | 126 | struct btrfs_root *root = btrfs_inode->root; |
4a0cc7ca | 127 | u64 ino = btrfs_ino(btrfs_inode); |
2f7e33d4 MX |
128 | int ret; |
129 | ||
130 | again: | |
340c6ca9 | 131 | node = btrfs_get_delayed_node(btrfs_inode); |
2f7e33d4 MX |
132 | if (node) |
133 | return node; | |
134 | ||
352dd9c8 | 135 | node = kmem_cache_zalloc(delayed_node_cache, GFP_NOFS); |
16cdcec7 MX |
136 | if (!node) |
137 | return ERR_PTR(-ENOMEM); | |
0d0ca30f | 138 | btrfs_init_delayed_node(node, root, ino); |
16cdcec7 | 139 | |
95e94d14 | 140 | /* cached in the btrfs inode and can be accessed */ |
6de5f18e | 141 | refcount_set(&node->refs, 2); |
16cdcec7 | 142 | |
e1860a77 | 143 | ret = radix_tree_preload(GFP_NOFS); |
16cdcec7 MX |
144 | if (ret) { |
145 | kmem_cache_free(delayed_node_cache, node); | |
146 | return ERR_PTR(ret); | |
147 | } | |
148 | ||
149 | spin_lock(&root->inode_lock); | |
0d0ca30f | 150 | ret = radix_tree_insert(&root->delayed_nodes_tree, ino, node); |
16cdcec7 | 151 | if (ret == -EEXIST) { |
16cdcec7 | 152 | spin_unlock(&root->inode_lock); |
96493031 | 153 | kmem_cache_free(delayed_node_cache, node); |
16cdcec7 MX |
154 | radix_tree_preload_end(); |
155 | goto again; | |
156 | } | |
157 | btrfs_inode->delayed_node = node; | |
158 | spin_unlock(&root->inode_lock); | |
159 | radix_tree_preload_end(); | |
160 | ||
161 | return node; | |
162 | } | |
163 | ||
164 | /* | |
165 | * Call it when holding delayed_node->mutex | |
166 | * | |
167 | * If mod = 1, add this node into the prepared list. | |
168 | */ | |
169 | static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root, | |
170 | struct btrfs_delayed_node *node, | |
171 | int mod) | |
172 | { | |
173 | spin_lock(&root->lock); | |
7cf35d91 | 174 | if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
16cdcec7 MX |
175 | if (!list_empty(&node->p_list)) |
176 | list_move_tail(&node->p_list, &root->prepare_list); | |
177 | else if (mod) | |
178 | list_add_tail(&node->p_list, &root->prepare_list); | |
179 | } else { | |
180 | list_add_tail(&node->n_list, &root->node_list); | |
181 | list_add_tail(&node->p_list, &root->prepare_list); | |
6de5f18e | 182 | refcount_inc(&node->refs); /* inserted into list */ |
16cdcec7 | 183 | root->nodes++; |
7cf35d91 | 184 | set_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); |
16cdcec7 MX |
185 | } |
186 | spin_unlock(&root->lock); | |
187 | } | |
188 | ||
189 | /* Call it when holding delayed_node->mutex */ | |
190 | static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root, | |
191 | struct btrfs_delayed_node *node) | |
192 | { | |
193 | spin_lock(&root->lock); | |
7cf35d91 | 194 | if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
16cdcec7 | 195 | root->nodes--; |
6de5f18e | 196 | refcount_dec(&node->refs); /* not in the list */ |
16cdcec7 MX |
197 | list_del_init(&node->n_list); |
198 | if (!list_empty(&node->p_list)) | |
199 | list_del_init(&node->p_list); | |
7cf35d91 | 200 | clear_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); |
16cdcec7 MX |
201 | } |
202 | spin_unlock(&root->lock); | |
203 | } | |
204 | ||
48a3b636 | 205 | static struct btrfs_delayed_node *btrfs_first_delayed_node( |
16cdcec7 MX |
206 | struct btrfs_delayed_root *delayed_root) |
207 | { | |
208 | struct list_head *p; | |
209 | struct btrfs_delayed_node *node = NULL; | |
210 | ||
211 | spin_lock(&delayed_root->lock); | |
212 | if (list_empty(&delayed_root->node_list)) | |
213 | goto out; | |
214 | ||
215 | p = delayed_root->node_list.next; | |
216 | node = list_entry(p, struct btrfs_delayed_node, n_list); | |
6de5f18e | 217 | refcount_inc(&node->refs); |
16cdcec7 MX |
218 | out: |
219 | spin_unlock(&delayed_root->lock); | |
220 | ||
221 | return node; | |
222 | } | |
223 | ||
48a3b636 | 224 | static struct btrfs_delayed_node *btrfs_next_delayed_node( |
16cdcec7 MX |
225 | struct btrfs_delayed_node *node) |
226 | { | |
227 | struct btrfs_delayed_root *delayed_root; | |
228 | struct list_head *p; | |
229 | struct btrfs_delayed_node *next = NULL; | |
230 | ||
231 | delayed_root = node->root->fs_info->delayed_root; | |
232 | spin_lock(&delayed_root->lock); | |
7cf35d91 MX |
233 | if (!test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
234 | /* not in the list */ | |
16cdcec7 MX |
235 | if (list_empty(&delayed_root->node_list)) |
236 | goto out; | |
237 | p = delayed_root->node_list.next; | |
238 | } else if (list_is_last(&node->n_list, &delayed_root->node_list)) | |
239 | goto out; | |
240 | else | |
241 | p = node->n_list.next; | |
242 | ||
243 | next = list_entry(p, struct btrfs_delayed_node, n_list); | |
6de5f18e | 244 | refcount_inc(&next->refs); |
16cdcec7 MX |
245 | out: |
246 | spin_unlock(&delayed_root->lock); | |
247 | ||
248 | return next; | |
249 | } | |
250 | ||
251 | static void __btrfs_release_delayed_node( | |
252 | struct btrfs_delayed_node *delayed_node, | |
253 | int mod) | |
254 | { | |
255 | struct btrfs_delayed_root *delayed_root; | |
256 | ||
257 | if (!delayed_node) | |
258 | return; | |
259 | ||
260 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
261 | ||
262 | mutex_lock(&delayed_node->mutex); | |
263 | if (delayed_node->count) | |
264 | btrfs_queue_delayed_node(delayed_root, delayed_node, mod); | |
265 | else | |
266 | btrfs_dequeue_delayed_node(delayed_root, delayed_node); | |
267 | mutex_unlock(&delayed_node->mutex); | |
268 | ||
6de5f18e | 269 | if (refcount_dec_and_test(&delayed_node->refs)) { |
16cdcec7 | 270 | struct btrfs_root *root = delayed_node->root; |
ec35e48b | 271 | |
16cdcec7 | 272 | spin_lock(&root->inode_lock); |
ec35e48b CM |
273 | /* |
274 | * Once our refcount goes to zero, nobody is allowed to bump it | |
275 | * back up. We can delete it now. | |
276 | */ | |
277 | ASSERT(refcount_read(&delayed_node->refs) == 0); | |
278 | radix_tree_delete(&root->delayed_nodes_tree, | |
279 | delayed_node->inode_id); | |
16cdcec7 | 280 | spin_unlock(&root->inode_lock); |
ec35e48b | 281 | kmem_cache_free(delayed_node_cache, delayed_node); |
16cdcec7 MX |
282 | } |
283 | } | |
284 | ||
285 | static inline void btrfs_release_delayed_node(struct btrfs_delayed_node *node) | |
286 | { | |
287 | __btrfs_release_delayed_node(node, 0); | |
288 | } | |
289 | ||
48a3b636 | 290 | static struct btrfs_delayed_node *btrfs_first_prepared_delayed_node( |
16cdcec7 MX |
291 | struct btrfs_delayed_root *delayed_root) |
292 | { | |
293 | struct list_head *p; | |
294 | struct btrfs_delayed_node *node = NULL; | |
295 | ||
296 | spin_lock(&delayed_root->lock); | |
297 | if (list_empty(&delayed_root->prepare_list)) | |
298 | goto out; | |
299 | ||
300 | p = delayed_root->prepare_list.next; | |
301 | list_del_init(p); | |
302 | node = list_entry(p, struct btrfs_delayed_node, p_list); | |
6de5f18e | 303 | refcount_inc(&node->refs); |
16cdcec7 MX |
304 | out: |
305 | spin_unlock(&delayed_root->lock); | |
306 | ||
307 | return node; | |
308 | } | |
309 | ||
310 | static inline void btrfs_release_prepared_delayed_node( | |
311 | struct btrfs_delayed_node *node) | |
312 | { | |
313 | __btrfs_release_delayed_node(node, 1); | |
314 | } | |
315 | ||
48a3b636 | 316 | static struct btrfs_delayed_item *btrfs_alloc_delayed_item(u32 data_len) |
16cdcec7 MX |
317 | { |
318 | struct btrfs_delayed_item *item; | |
319 | item = kmalloc(sizeof(*item) + data_len, GFP_NOFS); | |
320 | if (item) { | |
321 | item->data_len = data_len; | |
322 | item->ins_or_del = 0; | |
323 | item->bytes_reserved = 0; | |
16cdcec7 | 324 | item->delayed_node = NULL; |
089e77e1 | 325 | refcount_set(&item->refs, 1); |
16cdcec7 MX |
326 | } |
327 | return item; | |
328 | } | |
329 | ||
330 | /* | |
331 | * __btrfs_lookup_delayed_item - look up the delayed item by key | |
332 | * @delayed_node: pointer to the delayed node | |
333 | * @key: the key to look up | |
334 | * @prev: used to store the prev item if the right item isn't found | |
335 | * @next: used to store the next item if the right item isn't found | |
336 | * | |
337 | * Note: if we don't find the right item, we will return the prev item and | |
338 | * the next item. | |
339 | */ | |
340 | static struct btrfs_delayed_item *__btrfs_lookup_delayed_item( | |
341 | struct rb_root *root, | |
342 | struct btrfs_key *key, | |
343 | struct btrfs_delayed_item **prev, | |
344 | struct btrfs_delayed_item **next) | |
345 | { | |
346 | struct rb_node *node, *prev_node = NULL; | |
347 | struct btrfs_delayed_item *delayed_item = NULL; | |
348 | int ret = 0; | |
349 | ||
350 | node = root->rb_node; | |
351 | ||
352 | while (node) { | |
353 | delayed_item = rb_entry(node, struct btrfs_delayed_item, | |
354 | rb_node); | |
355 | prev_node = node; | |
356 | ret = btrfs_comp_cpu_keys(&delayed_item->key, key); | |
357 | if (ret < 0) | |
358 | node = node->rb_right; | |
359 | else if (ret > 0) | |
360 | node = node->rb_left; | |
361 | else | |
362 | return delayed_item; | |
363 | } | |
364 | ||
365 | if (prev) { | |
366 | if (!prev_node) | |
367 | *prev = NULL; | |
368 | else if (ret < 0) | |
369 | *prev = delayed_item; | |
370 | else if ((node = rb_prev(prev_node)) != NULL) { | |
371 | *prev = rb_entry(node, struct btrfs_delayed_item, | |
372 | rb_node); | |
373 | } else | |
374 | *prev = NULL; | |
375 | } | |
376 | ||
377 | if (next) { | |
378 | if (!prev_node) | |
379 | *next = NULL; | |
380 | else if (ret > 0) | |
381 | *next = delayed_item; | |
382 | else if ((node = rb_next(prev_node)) != NULL) { | |
383 | *next = rb_entry(node, struct btrfs_delayed_item, | |
384 | rb_node); | |
385 | } else | |
386 | *next = NULL; | |
387 | } | |
388 | return NULL; | |
389 | } | |
390 | ||
48a3b636 | 391 | static struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item( |
16cdcec7 MX |
392 | struct btrfs_delayed_node *delayed_node, |
393 | struct btrfs_key *key) | |
394 | { | |
03a1d4c8 | 395 | return __btrfs_lookup_delayed_item(&delayed_node->ins_root.rb_root, key, |
16cdcec7 | 396 | NULL, NULL); |
16cdcec7 MX |
397 | } |
398 | ||
16cdcec7 MX |
399 | static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node, |
400 | struct btrfs_delayed_item *ins, | |
401 | int action) | |
402 | { | |
403 | struct rb_node **p, *node; | |
404 | struct rb_node *parent_node = NULL; | |
03a1d4c8 | 405 | struct rb_root_cached *root; |
16cdcec7 MX |
406 | struct btrfs_delayed_item *item; |
407 | int cmp; | |
03a1d4c8 | 408 | bool leftmost = true; |
16cdcec7 MX |
409 | |
410 | if (action == BTRFS_DELAYED_INSERTION_ITEM) | |
411 | root = &delayed_node->ins_root; | |
412 | else if (action == BTRFS_DELAYED_DELETION_ITEM) | |
413 | root = &delayed_node->del_root; | |
414 | else | |
415 | BUG(); | |
03a1d4c8 | 416 | p = &root->rb_root.rb_node; |
16cdcec7 MX |
417 | node = &ins->rb_node; |
418 | ||
419 | while (*p) { | |
420 | parent_node = *p; | |
421 | item = rb_entry(parent_node, struct btrfs_delayed_item, | |
422 | rb_node); | |
423 | ||
424 | cmp = btrfs_comp_cpu_keys(&item->key, &ins->key); | |
03a1d4c8 | 425 | if (cmp < 0) { |
16cdcec7 | 426 | p = &(*p)->rb_right; |
03a1d4c8 LB |
427 | leftmost = false; |
428 | } else if (cmp > 0) { | |
16cdcec7 | 429 | p = &(*p)->rb_left; |
03a1d4c8 | 430 | } else { |
16cdcec7 | 431 | return -EEXIST; |
03a1d4c8 | 432 | } |
16cdcec7 MX |
433 | } |
434 | ||
435 | rb_link_node(node, parent_node, p); | |
03a1d4c8 | 436 | rb_insert_color_cached(node, root, leftmost); |
16cdcec7 MX |
437 | ins->delayed_node = delayed_node; |
438 | ins->ins_or_del = action; | |
439 | ||
440 | if (ins->key.type == BTRFS_DIR_INDEX_KEY && | |
441 | action == BTRFS_DELAYED_INSERTION_ITEM && | |
442 | ins->key.offset >= delayed_node->index_cnt) | |
443 | delayed_node->index_cnt = ins->key.offset + 1; | |
444 | ||
445 | delayed_node->count++; | |
446 | atomic_inc(&delayed_node->root->fs_info->delayed_root->items); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int __btrfs_add_delayed_insertion_item(struct btrfs_delayed_node *node, | |
451 | struct btrfs_delayed_item *item) | |
452 | { | |
453 | return __btrfs_add_delayed_item(node, item, | |
454 | BTRFS_DELAYED_INSERTION_ITEM); | |
455 | } | |
456 | ||
457 | static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node, | |
458 | struct btrfs_delayed_item *item) | |
459 | { | |
460 | return __btrfs_add_delayed_item(node, item, | |
461 | BTRFS_DELAYED_DELETION_ITEM); | |
462 | } | |
463 | ||
de3cb945 CM |
464 | static void finish_one_item(struct btrfs_delayed_root *delayed_root) |
465 | { | |
466 | int seq = atomic_inc_return(&delayed_root->items_seq); | |
ee863954 | 467 | |
093258e6 | 468 | /* atomic_dec_return implies a barrier */ |
de3cb945 | 469 | if ((atomic_dec_return(&delayed_root->items) < |
093258e6 DS |
470 | BTRFS_DELAYED_BACKGROUND || seq % BTRFS_DELAYED_BATCH == 0)) |
471 | cond_wake_up_nomb(&delayed_root->wait); | |
de3cb945 CM |
472 | } |
473 | ||
16cdcec7 MX |
474 | static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item) |
475 | { | |
03a1d4c8 | 476 | struct rb_root_cached *root; |
16cdcec7 MX |
477 | struct btrfs_delayed_root *delayed_root; |
478 | ||
933c22a7 QW |
479 | /* Not associated with any delayed_node */ |
480 | if (!delayed_item->delayed_node) | |
481 | return; | |
16cdcec7 MX |
482 | delayed_root = delayed_item->delayed_node->root->fs_info->delayed_root; |
483 | ||
484 | BUG_ON(!delayed_root); | |
485 | BUG_ON(delayed_item->ins_or_del != BTRFS_DELAYED_DELETION_ITEM && | |
486 | delayed_item->ins_or_del != BTRFS_DELAYED_INSERTION_ITEM); | |
487 | ||
488 | if (delayed_item->ins_or_del == BTRFS_DELAYED_INSERTION_ITEM) | |
489 | root = &delayed_item->delayed_node->ins_root; | |
490 | else | |
491 | root = &delayed_item->delayed_node->del_root; | |
492 | ||
03a1d4c8 | 493 | rb_erase_cached(&delayed_item->rb_node, root); |
16cdcec7 | 494 | delayed_item->delayed_node->count--; |
de3cb945 CM |
495 | |
496 | finish_one_item(delayed_root); | |
16cdcec7 MX |
497 | } |
498 | ||
499 | static void btrfs_release_delayed_item(struct btrfs_delayed_item *item) | |
500 | { | |
501 | if (item) { | |
502 | __btrfs_remove_delayed_item(item); | |
089e77e1 | 503 | if (refcount_dec_and_test(&item->refs)) |
16cdcec7 MX |
504 | kfree(item); |
505 | } | |
506 | } | |
507 | ||
48a3b636 | 508 | static struct btrfs_delayed_item *__btrfs_first_delayed_insertion_item( |
16cdcec7 MX |
509 | struct btrfs_delayed_node *delayed_node) |
510 | { | |
511 | struct rb_node *p; | |
512 | struct btrfs_delayed_item *item = NULL; | |
513 | ||
03a1d4c8 | 514 | p = rb_first_cached(&delayed_node->ins_root); |
16cdcec7 MX |
515 | if (p) |
516 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
517 | ||
518 | return item; | |
519 | } | |
520 | ||
48a3b636 | 521 | static struct btrfs_delayed_item *__btrfs_first_delayed_deletion_item( |
16cdcec7 MX |
522 | struct btrfs_delayed_node *delayed_node) |
523 | { | |
524 | struct rb_node *p; | |
525 | struct btrfs_delayed_item *item = NULL; | |
526 | ||
03a1d4c8 | 527 | p = rb_first_cached(&delayed_node->del_root); |
16cdcec7 MX |
528 | if (p) |
529 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
530 | ||
531 | return item; | |
532 | } | |
533 | ||
48a3b636 | 534 | static struct btrfs_delayed_item *__btrfs_next_delayed_item( |
16cdcec7 MX |
535 | struct btrfs_delayed_item *item) |
536 | { | |
537 | struct rb_node *p; | |
538 | struct btrfs_delayed_item *next = NULL; | |
539 | ||
540 | p = rb_next(&item->rb_node); | |
541 | if (p) | |
542 | next = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
543 | ||
544 | return next; | |
545 | } | |
546 | ||
16cdcec7 | 547 | static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans, |
4f5427cc | 548 | struct btrfs_root *root, |
16cdcec7 MX |
549 | struct btrfs_delayed_item *item) |
550 | { | |
551 | struct btrfs_block_rsv *src_rsv; | |
552 | struct btrfs_block_rsv *dst_rsv; | |
4f5427cc | 553 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
554 | u64 num_bytes; |
555 | int ret; | |
556 | ||
557 | if (!trans->bytes_reserved) | |
558 | return 0; | |
559 | ||
560 | src_rsv = trans->block_rsv; | |
0b246afa | 561 | dst_rsv = &fs_info->delayed_block_rsv; |
16cdcec7 | 562 | |
2bd36e7b | 563 | num_bytes = btrfs_calc_insert_metadata_size(fs_info, 1); |
f218ea6c QW |
564 | |
565 | /* | |
566 | * Here we migrate space rsv from transaction rsv, since have already | |
567 | * reserved space when starting a transaction. So no need to reserve | |
568 | * qgroup space here. | |
569 | */ | |
3a584174 | 570 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, true); |
8c2a3ca2 | 571 | if (!ret) { |
0b246afa | 572 | trace_btrfs_space_reservation(fs_info, "delayed_item", |
8c2a3ca2 JB |
573 | item->key.objectid, |
574 | num_bytes, 1); | |
16cdcec7 | 575 | item->bytes_reserved = num_bytes; |
8c2a3ca2 | 576 | } |
16cdcec7 MX |
577 | |
578 | return ret; | |
579 | } | |
580 | ||
4f5427cc | 581 | static void btrfs_delayed_item_release_metadata(struct btrfs_root *root, |
16cdcec7 MX |
582 | struct btrfs_delayed_item *item) |
583 | { | |
19fd2949 | 584 | struct btrfs_block_rsv *rsv; |
4f5427cc | 585 | struct btrfs_fs_info *fs_info = root->fs_info; |
19fd2949 | 586 | |
16cdcec7 MX |
587 | if (!item->bytes_reserved) |
588 | return; | |
589 | ||
0b246afa | 590 | rsv = &fs_info->delayed_block_rsv; |
f218ea6c QW |
591 | /* |
592 | * Check btrfs_delayed_item_reserve_metadata() to see why we don't need | |
593 | * to release/reserve qgroup space. | |
594 | */ | |
0b246afa | 595 | trace_btrfs_space_reservation(fs_info, "delayed_item", |
8c2a3ca2 JB |
596 | item->key.objectid, item->bytes_reserved, |
597 | 0); | |
63f018be | 598 | btrfs_block_rsv_release(fs_info, rsv, item->bytes_reserved, NULL); |
16cdcec7 MX |
599 | } |
600 | ||
601 | static int btrfs_delayed_inode_reserve_metadata( | |
602 | struct btrfs_trans_handle *trans, | |
603 | struct btrfs_root *root, | |
604 | struct btrfs_delayed_node *node) | |
605 | { | |
0b246afa | 606 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
607 | struct btrfs_block_rsv *src_rsv; |
608 | struct btrfs_block_rsv *dst_rsv; | |
609 | u64 num_bytes; | |
610 | int ret; | |
611 | ||
16cdcec7 | 612 | src_rsv = trans->block_rsv; |
0b246afa | 613 | dst_rsv = &fs_info->delayed_block_rsv; |
16cdcec7 | 614 | |
bcacf5f3 | 615 | num_bytes = btrfs_calc_metadata_size(fs_info, 1); |
c06a0e12 JB |
616 | |
617 | /* | |
618 | * btrfs_dirty_inode will update the inode under btrfs_join_transaction | |
619 | * which doesn't reserve space for speed. This is a problem since we | |
620 | * still need to reserve space for this update, so try to reserve the | |
621 | * space. | |
622 | * | |
623 | * Now if src_rsv == delalloc_block_rsv we'll let it just steal since | |
69fe2d75 | 624 | * we always reserve enough to update the inode item. |
c06a0e12 | 625 | */ |
e755d9ab | 626 | if (!src_rsv || (!trans->bytes_reserved && |
66d8f3dd | 627 | src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) { |
4d14c5cd NB |
628 | ret = btrfs_qgroup_reserve_meta(root, num_bytes, |
629 | BTRFS_QGROUP_RSV_META_PREALLOC, true); | |
f218ea6c QW |
630 | if (ret < 0) |
631 | return ret; | |
08e007d2 MX |
632 | ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes, |
633 | BTRFS_RESERVE_NO_FLUSH); | |
98686ffc NB |
634 | /* NO_FLUSH could only fail with -ENOSPC */ |
635 | ASSERT(ret == 0 || ret == -ENOSPC); | |
636 | if (ret) | |
0f9c03d8 | 637 | btrfs_qgroup_free_meta_prealloc(root, num_bytes); |
98686ffc NB |
638 | } else { |
639 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, true); | |
c06a0e12 JB |
640 | } |
641 | ||
8c2a3ca2 | 642 | if (!ret) { |
0b246afa | 643 | trace_btrfs_space_reservation(fs_info, "delayed_inode", |
8e3c9d3c | 644 | node->inode_id, num_bytes, 1); |
16cdcec7 | 645 | node->bytes_reserved = num_bytes; |
8c2a3ca2 | 646 | } |
16cdcec7 MX |
647 | |
648 | return ret; | |
649 | } | |
650 | ||
2ff7e61e | 651 | static void btrfs_delayed_inode_release_metadata(struct btrfs_fs_info *fs_info, |
4f5427cc QW |
652 | struct btrfs_delayed_node *node, |
653 | bool qgroup_free) | |
16cdcec7 MX |
654 | { |
655 | struct btrfs_block_rsv *rsv; | |
656 | ||
657 | if (!node->bytes_reserved) | |
658 | return; | |
659 | ||
0b246afa JM |
660 | rsv = &fs_info->delayed_block_rsv; |
661 | trace_btrfs_space_reservation(fs_info, "delayed_inode", | |
8c2a3ca2 | 662 | node->inode_id, node->bytes_reserved, 0); |
63f018be | 663 | btrfs_block_rsv_release(fs_info, rsv, node->bytes_reserved, NULL); |
4f5427cc QW |
664 | if (qgroup_free) |
665 | btrfs_qgroup_free_meta_prealloc(node->root, | |
666 | node->bytes_reserved); | |
667 | else | |
668 | btrfs_qgroup_convert_reserved_meta(node->root, | |
669 | node->bytes_reserved); | |
16cdcec7 MX |
670 | node->bytes_reserved = 0; |
671 | } | |
672 | ||
673 | /* | |
506650dc FM |
674 | * Insert a single delayed item or a batch of delayed items that have consecutive |
675 | * keys if they exist. | |
16cdcec7 | 676 | */ |
506650dc FM |
677 | static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, |
678 | struct btrfs_root *root, | |
679 | struct btrfs_path *path, | |
680 | struct btrfs_delayed_item *first_item) | |
16cdcec7 | 681 | { |
b7ef5f3a | 682 | LIST_HEAD(item_list); |
506650dc FM |
683 | struct btrfs_delayed_item *curr; |
684 | struct btrfs_delayed_item *next; | |
685 | const int max_size = BTRFS_LEAF_DATA_SIZE(root->fs_info); | |
b7ef5f3a | 686 | struct btrfs_item_batch batch; |
506650dc | 687 | int total_size; |
506650dc | 688 | char *ins_data = NULL; |
506650dc | 689 | int ret; |
16cdcec7 | 690 | |
b7ef5f3a FM |
691 | list_add_tail(&first_item->tree_list, &item_list); |
692 | batch.total_data_size = first_item->data_len; | |
693 | batch.nr = 1; | |
506650dc FM |
694 | total_size = first_item->data_len + sizeof(struct btrfs_item); |
695 | curr = first_item; | |
16cdcec7 | 696 | |
506650dc FM |
697 | while (true) { |
698 | int next_size; | |
16cdcec7 | 699 | |
16cdcec7 | 700 | next = __btrfs_next_delayed_item(curr); |
506650dc | 701 | if (!next || !btrfs_is_continuous_delayed_item(curr, next)) |
16cdcec7 MX |
702 | break; |
703 | ||
506650dc FM |
704 | next_size = next->data_len + sizeof(struct btrfs_item); |
705 | if (total_size + next_size > max_size) | |
16cdcec7 | 706 | break; |
16cdcec7 | 707 | |
b7ef5f3a FM |
708 | list_add_tail(&next->tree_list, &item_list); |
709 | batch.nr++; | |
506650dc | 710 | total_size += next_size; |
b7ef5f3a | 711 | batch.total_data_size += next->data_len; |
506650dc | 712 | curr = next; |
16cdcec7 MX |
713 | } |
714 | ||
b7ef5f3a FM |
715 | if (batch.nr == 1) { |
716 | batch.keys = &first_item->key; | |
717 | batch.data_sizes = &first_item->data_len; | |
506650dc | 718 | } else { |
b7ef5f3a FM |
719 | struct btrfs_key *ins_keys; |
720 | u32 *ins_sizes; | |
506650dc | 721 | int i = 0; |
16cdcec7 | 722 | |
b7ef5f3a FM |
723 | ins_data = kmalloc(batch.nr * sizeof(u32) + |
724 | batch.nr * sizeof(struct btrfs_key), GFP_NOFS); | |
506650dc FM |
725 | if (!ins_data) { |
726 | ret = -ENOMEM; | |
727 | goto out; | |
728 | } | |
729 | ins_sizes = (u32 *)ins_data; | |
b7ef5f3a FM |
730 | ins_keys = (struct btrfs_key *)(ins_data + batch.nr * sizeof(u32)); |
731 | batch.keys = ins_keys; | |
732 | batch.data_sizes = ins_sizes; | |
733 | list_for_each_entry(curr, &item_list, tree_list) { | |
506650dc FM |
734 | ins_keys[i] = curr->key; |
735 | ins_sizes[i] = curr->data_len; | |
736 | i++; | |
737 | } | |
16cdcec7 MX |
738 | } |
739 | ||
b7ef5f3a | 740 | ret = btrfs_insert_empty_items(trans, root, path, &batch); |
506650dc FM |
741 | if (ret) |
742 | goto out; | |
16cdcec7 | 743 | |
b7ef5f3a | 744 | list_for_each_entry(curr, &item_list, tree_list) { |
506650dc | 745 | char *data_ptr; |
16cdcec7 | 746 | |
506650dc FM |
747 | data_ptr = btrfs_item_ptr(path->nodes[0], path->slots[0], char); |
748 | write_extent_buffer(path->nodes[0], &curr->data, | |
749 | (unsigned long)data_ptr, curr->data_len); | |
750 | path->slots[0]++; | |
751 | } | |
16cdcec7 | 752 | |
506650dc FM |
753 | /* |
754 | * Now release our path before releasing the delayed items and their | |
755 | * metadata reservations, so that we don't block other tasks for more | |
756 | * time than needed. | |
757 | */ | |
758 | btrfs_release_path(path); | |
16cdcec7 | 759 | |
b7ef5f3a | 760 | list_for_each_entry_safe(curr, next, &item_list, tree_list) { |
16cdcec7 | 761 | list_del(&curr->tree_list); |
506650dc | 762 | btrfs_delayed_item_release_metadata(root, curr); |
16cdcec7 MX |
763 | btrfs_release_delayed_item(curr); |
764 | } | |
16cdcec7 | 765 | out: |
506650dc | 766 | kfree(ins_data); |
16cdcec7 MX |
767 | return ret; |
768 | } | |
769 | ||
16cdcec7 MX |
770 | static int btrfs_insert_delayed_items(struct btrfs_trans_handle *trans, |
771 | struct btrfs_path *path, | |
772 | struct btrfs_root *root, | |
773 | struct btrfs_delayed_node *node) | |
774 | { | |
16cdcec7 MX |
775 | int ret = 0; |
776 | ||
506650dc FM |
777 | while (ret == 0) { |
778 | struct btrfs_delayed_item *curr; | |
16cdcec7 | 779 | |
506650dc FM |
780 | mutex_lock(&node->mutex); |
781 | curr = __btrfs_first_delayed_insertion_item(node); | |
782 | if (!curr) { | |
783 | mutex_unlock(&node->mutex); | |
784 | break; | |
785 | } | |
786 | ret = btrfs_insert_delayed_item(trans, root, path, curr); | |
787 | mutex_unlock(&node->mutex); | |
16cdcec7 | 788 | } |
16cdcec7 | 789 | |
16cdcec7 MX |
790 | return ret; |
791 | } | |
792 | ||
793 | static int btrfs_batch_delete_items(struct btrfs_trans_handle *trans, | |
794 | struct btrfs_root *root, | |
795 | struct btrfs_path *path, | |
796 | struct btrfs_delayed_item *item) | |
797 | { | |
798 | struct btrfs_delayed_item *curr, *next; | |
799 | struct extent_buffer *leaf; | |
800 | struct btrfs_key key; | |
801 | struct list_head head; | |
802 | int nitems, i, last_item; | |
803 | int ret = 0; | |
804 | ||
805 | BUG_ON(!path->nodes[0]); | |
806 | ||
807 | leaf = path->nodes[0]; | |
808 | ||
809 | i = path->slots[0]; | |
810 | last_item = btrfs_header_nritems(leaf) - 1; | |
811 | if (i > last_item) | |
812 | return -ENOENT; /* FIXME: Is errno suitable? */ | |
813 | ||
814 | next = item; | |
815 | INIT_LIST_HEAD(&head); | |
816 | btrfs_item_key_to_cpu(leaf, &key, i); | |
817 | nitems = 0; | |
818 | /* | |
819 | * count the number of the dir index items that we can delete in batch | |
820 | */ | |
821 | while (btrfs_comp_cpu_keys(&next->key, &key) == 0) { | |
822 | list_add_tail(&next->tree_list, &head); | |
823 | nitems++; | |
824 | ||
825 | curr = next; | |
826 | next = __btrfs_next_delayed_item(curr); | |
827 | if (!next) | |
828 | break; | |
829 | ||
830 | if (!btrfs_is_continuous_delayed_item(curr, next)) | |
831 | break; | |
832 | ||
833 | i++; | |
834 | if (i > last_item) | |
835 | break; | |
836 | btrfs_item_key_to_cpu(leaf, &key, i); | |
837 | } | |
838 | ||
839 | if (!nitems) | |
840 | return 0; | |
841 | ||
842 | ret = btrfs_del_items(trans, root, path, path->slots[0], nitems); | |
843 | if (ret) | |
844 | goto out; | |
845 | ||
846 | list_for_each_entry_safe(curr, next, &head, tree_list) { | |
4f5427cc | 847 | btrfs_delayed_item_release_metadata(root, curr); |
16cdcec7 MX |
848 | list_del(&curr->tree_list); |
849 | btrfs_release_delayed_item(curr); | |
850 | } | |
851 | ||
852 | out: | |
853 | return ret; | |
854 | } | |
855 | ||
856 | static int btrfs_delete_delayed_items(struct btrfs_trans_handle *trans, | |
857 | struct btrfs_path *path, | |
858 | struct btrfs_root *root, | |
859 | struct btrfs_delayed_node *node) | |
860 | { | |
861 | struct btrfs_delayed_item *curr, *prev; | |
862 | int ret = 0; | |
863 | ||
864 | do_again: | |
865 | mutex_lock(&node->mutex); | |
866 | curr = __btrfs_first_delayed_deletion_item(node); | |
867 | if (!curr) | |
868 | goto delete_fail; | |
869 | ||
870 | ret = btrfs_search_slot(trans, root, &curr->key, path, -1, 1); | |
871 | if (ret < 0) | |
872 | goto delete_fail; | |
873 | else if (ret > 0) { | |
874 | /* | |
875 | * can't find the item which the node points to, so this node | |
876 | * is invalid, just drop it. | |
877 | */ | |
878 | prev = curr; | |
879 | curr = __btrfs_next_delayed_item(prev); | |
880 | btrfs_release_delayed_item(prev); | |
881 | ret = 0; | |
945d8962 | 882 | btrfs_release_path(path); |
62095265 FW |
883 | if (curr) { |
884 | mutex_unlock(&node->mutex); | |
16cdcec7 | 885 | goto do_again; |
62095265 | 886 | } else |
16cdcec7 MX |
887 | goto delete_fail; |
888 | } | |
889 | ||
890 | btrfs_batch_delete_items(trans, root, path, curr); | |
945d8962 | 891 | btrfs_release_path(path); |
16cdcec7 MX |
892 | mutex_unlock(&node->mutex); |
893 | goto do_again; | |
894 | ||
895 | delete_fail: | |
945d8962 | 896 | btrfs_release_path(path); |
16cdcec7 MX |
897 | mutex_unlock(&node->mutex); |
898 | return ret; | |
899 | } | |
900 | ||
901 | static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) | |
902 | { | |
903 | struct btrfs_delayed_root *delayed_root; | |
904 | ||
7cf35d91 MX |
905 | if (delayed_node && |
906 | test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { | |
16cdcec7 | 907 | BUG_ON(!delayed_node->root); |
7cf35d91 | 908 | clear_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); |
16cdcec7 MX |
909 | delayed_node->count--; |
910 | ||
911 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
de3cb945 | 912 | finish_one_item(delayed_root); |
16cdcec7 MX |
913 | } |
914 | } | |
915 | ||
67de1176 MX |
916 | static void btrfs_release_delayed_iref(struct btrfs_delayed_node *delayed_node) |
917 | { | |
67de1176 | 918 | |
a4cb90dc JB |
919 | if (test_and_clear_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) { |
920 | struct btrfs_delayed_root *delayed_root; | |
67de1176 | 921 | |
a4cb90dc JB |
922 | ASSERT(delayed_node->root); |
923 | delayed_node->count--; | |
924 | ||
925 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
926 | finish_one_item(delayed_root); | |
927 | } | |
67de1176 MX |
928 | } |
929 | ||
0e8c36a9 MX |
930 | static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, |
931 | struct btrfs_root *root, | |
932 | struct btrfs_path *path, | |
933 | struct btrfs_delayed_node *node) | |
16cdcec7 | 934 | { |
2ff7e61e | 935 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
936 | struct btrfs_key key; |
937 | struct btrfs_inode_item *inode_item; | |
938 | struct extent_buffer *leaf; | |
67de1176 | 939 | int mod; |
16cdcec7 MX |
940 | int ret; |
941 | ||
16cdcec7 | 942 | key.objectid = node->inode_id; |
962a298f | 943 | key.type = BTRFS_INODE_ITEM_KEY; |
16cdcec7 | 944 | key.offset = 0; |
0e8c36a9 | 945 | |
67de1176 MX |
946 | if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) |
947 | mod = -1; | |
948 | else | |
949 | mod = 1; | |
950 | ||
951 | ret = btrfs_lookup_inode(trans, root, path, &key, mod); | |
bb385bed JB |
952 | if (ret > 0) |
953 | ret = -ENOENT; | |
954 | if (ret < 0) | |
955 | goto out; | |
16cdcec7 | 956 | |
16cdcec7 MX |
957 | leaf = path->nodes[0]; |
958 | inode_item = btrfs_item_ptr(leaf, path->slots[0], | |
959 | struct btrfs_inode_item); | |
960 | write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item, | |
961 | sizeof(struct btrfs_inode_item)); | |
962 | btrfs_mark_buffer_dirty(leaf); | |
16cdcec7 | 963 | |
67de1176 | 964 | if (!test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) |
a4cb90dc | 965 | goto out; |
67de1176 MX |
966 | |
967 | path->slots[0]++; | |
968 | if (path->slots[0] >= btrfs_header_nritems(leaf)) | |
969 | goto search; | |
970 | again: | |
971 | btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); | |
972 | if (key.objectid != node->inode_id) | |
973 | goto out; | |
974 | ||
975 | if (key.type != BTRFS_INODE_REF_KEY && | |
976 | key.type != BTRFS_INODE_EXTREF_KEY) | |
977 | goto out; | |
978 | ||
979 | /* | |
980 | * Delayed iref deletion is for the inode who has only one link, | |
981 | * so there is only one iref. The case that several irefs are | |
982 | * in the same item doesn't exist. | |
983 | */ | |
984 | btrfs_del_item(trans, root, path); | |
985 | out: | |
986 | btrfs_release_delayed_iref(node); | |
67de1176 MX |
987 | btrfs_release_path(path); |
988 | err_out: | |
4f5427cc | 989 | btrfs_delayed_inode_release_metadata(fs_info, node, (ret < 0)); |
16cdcec7 | 990 | btrfs_release_delayed_inode(node); |
16cdcec7 | 991 | |
04587ad9 JB |
992 | /* |
993 | * If we fail to update the delayed inode we need to abort the | |
994 | * transaction, because we could leave the inode with the improper | |
995 | * counts behind. | |
996 | */ | |
997 | if (ret && ret != -ENOENT) | |
998 | btrfs_abort_transaction(trans, ret); | |
999 | ||
67de1176 MX |
1000 | return ret; |
1001 | ||
1002 | search: | |
1003 | btrfs_release_path(path); | |
1004 | ||
962a298f | 1005 | key.type = BTRFS_INODE_EXTREF_KEY; |
67de1176 | 1006 | key.offset = -1; |
351cbf6e | 1007 | |
67de1176 MX |
1008 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
1009 | if (ret < 0) | |
1010 | goto err_out; | |
1011 | ASSERT(ret); | |
1012 | ||
1013 | ret = 0; | |
1014 | leaf = path->nodes[0]; | |
1015 | path->slots[0]--; | |
1016 | goto again; | |
16cdcec7 MX |
1017 | } |
1018 | ||
0e8c36a9 MX |
1019 | static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, |
1020 | struct btrfs_root *root, | |
1021 | struct btrfs_path *path, | |
1022 | struct btrfs_delayed_node *node) | |
1023 | { | |
1024 | int ret; | |
1025 | ||
1026 | mutex_lock(&node->mutex); | |
7cf35d91 | 1027 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &node->flags)) { |
0e8c36a9 MX |
1028 | mutex_unlock(&node->mutex); |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | ret = __btrfs_update_delayed_inode(trans, root, path, node); | |
1033 | mutex_unlock(&node->mutex); | |
1034 | return ret; | |
1035 | } | |
1036 | ||
4ea41ce0 MX |
1037 | static inline int |
1038 | __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, | |
1039 | struct btrfs_path *path, | |
1040 | struct btrfs_delayed_node *node) | |
1041 | { | |
1042 | int ret; | |
1043 | ||
1044 | ret = btrfs_insert_delayed_items(trans, path, node->root, node); | |
1045 | if (ret) | |
1046 | return ret; | |
1047 | ||
1048 | ret = btrfs_delete_delayed_items(trans, path, node->root, node); | |
1049 | if (ret) | |
1050 | return ret; | |
1051 | ||
1052 | ret = btrfs_update_delayed_inode(trans, node->root, path, node); | |
1053 | return ret; | |
1054 | } | |
1055 | ||
79787eaa JM |
1056 | /* |
1057 | * Called when committing the transaction. | |
1058 | * Returns 0 on success. | |
1059 | * Returns < 0 on error and returns with an aborted transaction with any | |
1060 | * outstanding delayed items cleaned up. | |
1061 | */ | |
b84acab3 | 1062 | static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans, int nr) |
16cdcec7 | 1063 | { |
b84acab3 | 1064 | struct btrfs_fs_info *fs_info = trans->fs_info; |
16cdcec7 MX |
1065 | struct btrfs_delayed_root *delayed_root; |
1066 | struct btrfs_delayed_node *curr_node, *prev_node; | |
1067 | struct btrfs_path *path; | |
19fd2949 | 1068 | struct btrfs_block_rsv *block_rsv; |
16cdcec7 | 1069 | int ret = 0; |
96c3f433 | 1070 | bool count = (nr > 0); |
16cdcec7 | 1071 | |
bf31f87f | 1072 | if (TRANS_ABORTED(trans)) |
79787eaa JM |
1073 | return -EIO; |
1074 | ||
16cdcec7 MX |
1075 | path = btrfs_alloc_path(); |
1076 | if (!path) | |
1077 | return -ENOMEM; | |
16cdcec7 | 1078 | |
19fd2949 | 1079 | block_rsv = trans->block_rsv; |
0b246afa | 1080 | trans->block_rsv = &fs_info->delayed_block_rsv; |
19fd2949 | 1081 | |
ccdf9b30 | 1082 | delayed_root = fs_info->delayed_root; |
16cdcec7 MX |
1083 | |
1084 | curr_node = btrfs_first_delayed_node(delayed_root); | |
a4559e6f | 1085 | while (curr_node && (!count || nr--)) { |
4ea41ce0 MX |
1086 | ret = __btrfs_commit_inode_delayed_items(trans, path, |
1087 | curr_node); | |
16cdcec7 MX |
1088 | if (ret) { |
1089 | btrfs_release_delayed_node(curr_node); | |
96c3f433 | 1090 | curr_node = NULL; |
66642832 | 1091 | btrfs_abort_transaction(trans, ret); |
16cdcec7 MX |
1092 | break; |
1093 | } | |
1094 | ||
1095 | prev_node = curr_node; | |
1096 | curr_node = btrfs_next_delayed_node(curr_node); | |
1097 | btrfs_release_delayed_node(prev_node); | |
1098 | } | |
1099 | ||
96c3f433 JB |
1100 | if (curr_node) |
1101 | btrfs_release_delayed_node(curr_node); | |
16cdcec7 | 1102 | btrfs_free_path(path); |
19fd2949 | 1103 | trans->block_rsv = block_rsv; |
79787eaa | 1104 | |
16cdcec7 MX |
1105 | return ret; |
1106 | } | |
1107 | ||
e5c304e6 | 1108 | int btrfs_run_delayed_items(struct btrfs_trans_handle *trans) |
96c3f433 | 1109 | { |
b84acab3 | 1110 | return __btrfs_run_delayed_items(trans, -1); |
96c3f433 JB |
1111 | } |
1112 | ||
e5c304e6 | 1113 | int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, int nr) |
96c3f433 | 1114 | { |
b84acab3 | 1115 | return __btrfs_run_delayed_items(trans, nr); |
96c3f433 JB |
1116 | } |
1117 | ||
16cdcec7 | 1118 | int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, |
5f4b32e9 | 1119 | struct btrfs_inode *inode) |
16cdcec7 | 1120 | { |
5f4b32e9 | 1121 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); |
4ea41ce0 MX |
1122 | struct btrfs_path *path; |
1123 | struct btrfs_block_rsv *block_rsv; | |
16cdcec7 MX |
1124 | int ret; |
1125 | ||
1126 | if (!delayed_node) | |
1127 | return 0; | |
1128 | ||
1129 | mutex_lock(&delayed_node->mutex); | |
1130 | if (!delayed_node->count) { | |
1131 | mutex_unlock(&delayed_node->mutex); | |
1132 | btrfs_release_delayed_node(delayed_node); | |
1133 | return 0; | |
1134 | } | |
1135 | mutex_unlock(&delayed_node->mutex); | |
1136 | ||
4ea41ce0 | 1137 | path = btrfs_alloc_path(); |
3c77bd94 FDBM |
1138 | if (!path) { |
1139 | btrfs_release_delayed_node(delayed_node); | |
4ea41ce0 | 1140 | return -ENOMEM; |
3c77bd94 | 1141 | } |
4ea41ce0 MX |
1142 | |
1143 | block_rsv = trans->block_rsv; | |
1144 | trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; | |
1145 | ||
1146 | ret = __btrfs_commit_inode_delayed_items(trans, path, delayed_node); | |
1147 | ||
16cdcec7 | 1148 | btrfs_release_delayed_node(delayed_node); |
4ea41ce0 MX |
1149 | btrfs_free_path(path); |
1150 | trans->block_rsv = block_rsv; | |
1151 | ||
16cdcec7 MX |
1152 | return ret; |
1153 | } | |
1154 | ||
aa79021f | 1155 | int btrfs_commit_inode_delayed_inode(struct btrfs_inode *inode) |
0e8c36a9 | 1156 | { |
3ffbd68c | 1157 | struct btrfs_fs_info *fs_info = inode->root->fs_info; |
0e8c36a9 | 1158 | struct btrfs_trans_handle *trans; |
aa79021f | 1159 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); |
0e8c36a9 MX |
1160 | struct btrfs_path *path; |
1161 | struct btrfs_block_rsv *block_rsv; | |
1162 | int ret; | |
1163 | ||
1164 | if (!delayed_node) | |
1165 | return 0; | |
1166 | ||
1167 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1168 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
0e8c36a9 MX |
1169 | mutex_unlock(&delayed_node->mutex); |
1170 | btrfs_release_delayed_node(delayed_node); | |
1171 | return 0; | |
1172 | } | |
1173 | mutex_unlock(&delayed_node->mutex); | |
1174 | ||
1175 | trans = btrfs_join_transaction(delayed_node->root); | |
1176 | if (IS_ERR(trans)) { | |
1177 | ret = PTR_ERR(trans); | |
1178 | goto out; | |
1179 | } | |
1180 | ||
1181 | path = btrfs_alloc_path(); | |
1182 | if (!path) { | |
1183 | ret = -ENOMEM; | |
1184 | goto trans_out; | |
1185 | } | |
0e8c36a9 MX |
1186 | |
1187 | block_rsv = trans->block_rsv; | |
2ff7e61e | 1188 | trans->block_rsv = &fs_info->delayed_block_rsv; |
0e8c36a9 MX |
1189 | |
1190 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1191 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) |
0e8c36a9 MX |
1192 | ret = __btrfs_update_delayed_inode(trans, delayed_node->root, |
1193 | path, delayed_node); | |
1194 | else | |
1195 | ret = 0; | |
1196 | mutex_unlock(&delayed_node->mutex); | |
1197 | ||
1198 | btrfs_free_path(path); | |
1199 | trans->block_rsv = block_rsv; | |
1200 | trans_out: | |
3a45bb20 | 1201 | btrfs_end_transaction(trans); |
2ff7e61e | 1202 | btrfs_btree_balance_dirty(fs_info); |
0e8c36a9 MX |
1203 | out: |
1204 | btrfs_release_delayed_node(delayed_node); | |
1205 | ||
1206 | return ret; | |
1207 | } | |
1208 | ||
f48d1cf5 | 1209 | void btrfs_remove_delayed_node(struct btrfs_inode *inode) |
16cdcec7 MX |
1210 | { |
1211 | struct btrfs_delayed_node *delayed_node; | |
1212 | ||
f48d1cf5 | 1213 | delayed_node = READ_ONCE(inode->delayed_node); |
16cdcec7 MX |
1214 | if (!delayed_node) |
1215 | return; | |
1216 | ||
f48d1cf5 | 1217 | inode->delayed_node = NULL; |
16cdcec7 MX |
1218 | btrfs_release_delayed_node(delayed_node); |
1219 | } | |
1220 | ||
de3cb945 CM |
1221 | struct btrfs_async_delayed_work { |
1222 | struct btrfs_delayed_root *delayed_root; | |
1223 | int nr; | |
d458b054 | 1224 | struct btrfs_work work; |
16cdcec7 MX |
1225 | }; |
1226 | ||
d458b054 | 1227 | static void btrfs_async_run_delayed_root(struct btrfs_work *work) |
16cdcec7 | 1228 | { |
de3cb945 CM |
1229 | struct btrfs_async_delayed_work *async_work; |
1230 | struct btrfs_delayed_root *delayed_root; | |
16cdcec7 MX |
1231 | struct btrfs_trans_handle *trans; |
1232 | struct btrfs_path *path; | |
1233 | struct btrfs_delayed_node *delayed_node = NULL; | |
1234 | struct btrfs_root *root; | |
19fd2949 | 1235 | struct btrfs_block_rsv *block_rsv; |
de3cb945 | 1236 | int total_done = 0; |
16cdcec7 | 1237 | |
de3cb945 CM |
1238 | async_work = container_of(work, struct btrfs_async_delayed_work, work); |
1239 | delayed_root = async_work->delayed_root; | |
16cdcec7 MX |
1240 | |
1241 | path = btrfs_alloc_path(); | |
1242 | if (!path) | |
1243 | goto out; | |
16cdcec7 | 1244 | |
617c54a8 NB |
1245 | do { |
1246 | if (atomic_read(&delayed_root->items) < | |
1247 | BTRFS_DELAYED_BACKGROUND / 2) | |
1248 | break; | |
de3cb945 | 1249 | |
617c54a8 NB |
1250 | delayed_node = btrfs_first_prepared_delayed_node(delayed_root); |
1251 | if (!delayed_node) | |
1252 | break; | |
de3cb945 | 1253 | |
617c54a8 | 1254 | root = delayed_node->root; |
16cdcec7 | 1255 | |
617c54a8 NB |
1256 | trans = btrfs_join_transaction(root); |
1257 | if (IS_ERR(trans)) { | |
1258 | btrfs_release_path(path); | |
1259 | btrfs_release_prepared_delayed_node(delayed_node); | |
1260 | total_done++; | |
1261 | continue; | |
1262 | } | |
16cdcec7 | 1263 | |
617c54a8 NB |
1264 | block_rsv = trans->block_rsv; |
1265 | trans->block_rsv = &root->fs_info->delayed_block_rsv; | |
19fd2949 | 1266 | |
617c54a8 | 1267 | __btrfs_commit_inode_delayed_items(trans, path, delayed_node); |
16cdcec7 | 1268 | |
617c54a8 NB |
1269 | trans->block_rsv = block_rsv; |
1270 | btrfs_end_transaction(trans); | |
1271 | btrfs_btree_balance_dirty_nodelay(root->fs_info); | |
de3cb945 | 1272 | |
617c54a8 NB |
1273 | btrfs_release_path(path); |
1274 | btrfs_release_prepared_delayed_node(delayed_node); | |
1275 | total_done++; | |
de3cb945 | 1276 | |
617c54a8 NB |
1277 | } while ((async_work->nr == 0 && total_done < BTRFS_DELAYED_WRITEBACK) |
1278 | || total_done < async_work->nr); | |
de3cb945 | 1279 | |
16cdcec7 MX |
1280 | btrfs_free_path(path); |
1281 | out: | |
de3cb945 CM |
1282 | wake_up(&delayed_root->wait); |
1283 | kfree(async_work); | |
16cdcec7 MX |
1284 | } |
1285 | ||
de3cb945 | 1286 | |
16cdcec7 | 1287 | static int btrfs_wq_run_delayed_node(struct btrfs_delayed_root *delayed_root, |
a585e948 | 1288 | struct btrfs_fs_info *fs_info, int nr) |
16cdcec7 | 1289 | { |
de3cb945 | 1290 | struct btrfs_async_delayed_work *async_work; |
16cdcec7 | 1291 | |
de3cb945 CM |
1292 | async_work = kmalloc(sizeof(*async_work), GFP_NOFS); |
1293 | if (!async_work) | |
16cdcec7 | 1294 | return -ENOMEM; |
16cdcec7 | 1295 | |
de3cb945 | 1296 | async_work->delayed_root = delayed_root; |
a0cac0ec OS |
1297 | btrfs_init_work(&async_work->work, btrfs_async_run_delayed_root, NULL, |
1298 | NULL); | |
de3cb945 | 1299 | async_work->nr = nr; |
16cdcec7 | 1300 | |
a585e948 | 1301 | btrfs_queue_work(fs_info->delayed_workers, &async_work->work); |
16cdcec7 MX |
1302 | return 0; |
1303 | } | |
1304 | ||
ccdf9b30 | 1305 | void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info) |
e999376f | 1306 | { |
ccdf9b30 | 1307 | WARN_ON(btrfs_first_delayed_node(fs_info->delayed_root)); |
e999376f CM |
1308 | } |
1309 | ||
0353808c | 1310 | static int could_end_wait(struct btrfs_delayed_root *delayed_root, int seq) |
de3cb945 CM |
1311 | { |
1312 | int val = atomic_read(&delayed_root->items_seq); | |
1313 | ||
0353808c | 1314 | if (val < seq || val >= seq + BTRFS_DELAYED_BATCH) |
de3cb945 | 1315 | return 1; |
0353808c MX |
1316 | |
1317 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) | |
1318 | return 1; | |
1319 | ||
de3cb945 CM |
1320 | return 0; |
1321 | } | |
1322 | ||
2ff7e61e | 1323 | void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info) |
16cdcec7 | 1324 | { |
2ff7e61e | 1325 | struct btrfs_delayed_root *delayed_root = fs_info->delayed_root; |
16cdcec7 | 1326 | |
8577787f NB |
1327 | if ((atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) || |
1328 | btrfs_workqueue_normal_congested(fs_info->delayed_workers)) | |
16cdcec7 MX |
1329 | return; |
1330 | ||
1331 | if (atomic_read(&delayed_root->items) >= BTRFS_DELAYED_WRITEBACK) { | |
0353808c | 1332 | int seq; |
16cdcec7 | 1333 | int ret; |
0353808c MX |
1334 | |
1335 | seq = atomic_read(&delayed_root->items_seq); | |
de3cb945 | 1336 | |
a585e948 | 1337 | ret = btrfs_wq_run_delayed_node(delayed_root, fs_info, 0); |
16cdcec7 MX |
1338 | if (ret) |
1339 | return; | |
1340 | ||
0353808c MX |
1341 | wait_event_interruptible(delayed_root->wait, |
1342 | could_end_wait(delayed_root, seq)); | |
4dd466d3 | 1343 | return; |
16cdcec7 MX |
1344 | } |
1345 | ||
a585e948 | 1346 | btrfs_wq_run_delayed_node(delayed_root, fs_info, BTRFS_DELAYED_BATCH); |
16cdcec7 MX |
1347 | } |
1348 | ||
79787eaa | 1349 | /* Will return 0 or -ENOMEM */ |
16cdcec7 | 1350 | int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, |
2ff7e61e | 1351 | const char *name, int name_len, |
6f45d185 | 1352 | struct btrfs_inode *dir, |
16cdcec7 MX |
1353 | struct btrfs_disk_key *disk_key, u8 type, |
1354 | u64 index) | |
1355 | { | |
1356 | struct btrfs_delayed_node *delayed_node; | |
1357 | struct btrfs_delayed_item *delayed_item; | |
1358 | struct btrfs_dir_item *dir_item; | |
1359 | int ret; | |
1360 | ||
6f45d185 | 1361 | delayed_node = btrfs_get_or_create_delayed_node(dir); |
16cdcec7 MX |
1362 | if (IS_ERR(delayed_node)) |
1363 | return PTR_ERR(delayed_node); | |
1364 | ||
1365 | delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len); | |
1366 | if (!delayed_item) { | |
1367 | ret = -ENOMEM; | |
1368 | goto release_node; | |
1369 | } | |
1370 | ||
6f45d185 | 1371 | delayed_item->key.objectid = btrfs_ino(dir); |
962a298f | 1372 | delayed_item->key.type = BTRFS_DIR_INDEX_KEY; |
16cdcec7 MX |
1373 | delayed_item->key.offset = index; |
1374 | ||
1375 | dir_item = (struct btrfs_dir_item *)delayed_item->data; | |
1376 | dir_item->location = *disk_key; | |
3cae210f QW |
1377 | btrfs_set_stack_dir_transid(dir_item, trans->transid); |
1378 | btrfs_set_stack_dir_data_len(dir_item, 0); | |
1379 | btrfs_set_stack_dir_name_len(dir_item, name_len); | |
1380 | btrfs_set_stack_dir_type(dir_item, type); | |
16cdcec7 MX |
1381 | memcpy((char *)(dir_item + 1), name, name_len); |
1382 | ||
4f5427cc | 1383 | ret = btrfs_delayed_item_reserve_metadata(trans, dir->root, delayed_item); |
8c2a3ca2 JB |
1384 | /* |
1385 | * we have reserved enough space when we start a new transaction, | |
1386 | * so reserving metadata failure is impossible | |
1387 | */ | |
1388 | BUG_ON(ret); | |
1389 | ||
16cdcec7 MX |
1390 | mutex_lock(&delayed_node->mutex); |
1391 | ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item); | |
1392 | if (unlikely(ret)) { | |
4465c8b4 | 1393 | btrfs_err(trans->fs_info, |
5d163e0e | 1394 | "err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", |
4fd786e6 | 1395 | name_len, name, delayed_node->root->root_key.objectid, |
5d163e0e | 1396 | delayed_node->inode_id, ret); |
16cdcec7 MX |
1397 | BUG(); |
1398 | } | |
1399 | mutex_unlock(&delayed_node->mutex); | |
1400 | ||
1401 | release_node: | |
1402 | btrfs_release_delayed_node(delayed_node); | |
1403 | return ret; | |
1404 | } | |
1405 | ||
2ff7e61e | 1406 | static int btrfs_delete_delayed_insertion_item(struct btrfs_fs_info *fs_info, |
16cdcec7 MX |
1407 | struct btrfs_delayed_node *node, |
1408 | struct btrfs_key *key) | |
1409 | { | |
1410 | struct btrfs_delayed_item *item; | |
1411 | ||
1412 | mutex_lock(&node->mutex); | |
1413 | item = __btrfs_lookup_delayed_insertion_item(node, key); | |
1414 | if (!item) { | |
1415 | mutex_unlock(&node->mutex); | |
1416 | return 1; | |
1417 | } | |
1418 | ||
4f5427cc | 1419 | btrfs_delayed_item_release_metadata(node->root, item); |
16cdcec7 MX |
1420 | btrfs_release_delayed_item(item); |
1421 | mutex_unlock(&node->mutex); | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, | |
e67bbbb9 | 1426 | struct btrfs_inode *dir, u64 index) |
16cdcec7 MX |
1427 | { |
1428 | struct btrfs_delayed_node *node; | |
1429 | struct btrfs_delayed_item *item; | |
1430 | struct btrfs_key item_key; | |
1431 | int ret; | |
1432 | ||
e67bbbb9 | 1433 | node = btrfs_get_or_create_delayed_node(dir); |
16cdcec7 MX |
1434 | if (IS_ERR(node)) |
1435 | return PTR_ERR(node); | |
1436 | ||
e67bbbb9 | 1437 | item_key.objectid = btrfs_ino(dir); |
962a298f | 1438 | item_key.type = BTRFS_DIR_INDEX_KEY; |
16cdcec7 MX |
1439 | item_key.offset = index; |
1440 | ||
9add2945 LF |
1441 | ret = btrfs_delete_delayed_insertion_item(trans->fs_info, node, |
1442 | &item_key); | |
16cdcec7 MX |
1443 | if (!ret) |
1444 | goto end; | |
1445 | ||
1446 | item = btrfs_alloc_delayed_item(0); | |
1447 | if (!item) { | |
1448 | ret = -ENOMEM; | |
1449 | goto end; | |
1450 | } | |
1451 | ||
1452 | item->key = item_key; | |
1453 | ||
4f5427cc | 1454 | ret = btrfs_delayed_item_reserve_metadata(trans, dir->root, item); |
16cdcec7 MX |
1455 | /* |
1456 | * we have reserved enough space when we start a new transaction, | |
1457 | * so reserving metadata failure is impossible. | |
1458 | */ | |
933c22a7 QW |
1459 | if (ret < 0) { |
1460 | btrfs_err(trans->fs_info, | |
1461 | "metadata reservation failed for delayed dir item deltiona, should have been reserved"); | |
1462 | btrfs_release_delayed_item(item); | |
1463 | goto end; | |
1464 | } | |
16cdcec7 MX |
1465 | |
1466 | mutex_lock(&node->mutex); | |
1467 | ret = __btrfs_add_delayed_deletion_item(node, item); | |
1468 | if (unlikely(ret)) { | |
9add2945 | 1469 | btrfs_err(trans->fs_info, |
5d163e0e | 1470 | "err add delayed dir index item(index: %llu) into the deletion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", |
4fd786e6 MT |
1471 | index, node->root->root_key.objectid, |
1472 | node->inode_id, ret); | |
933c22a7 QW |
1473 | btrfs_delayed_item_release_metadata(dir->root, item); |
1474 | btrfs_release_delayed_item(item); | |
16cdcec7 MX |
1475 | } |
1476 | mutex_unlock(&node->mutex); | |
1477 | end: | |
1478 | btrfs_release_delayed_node(node); | |
1479 | return ret; | |
1480 | } | |
1481 | ||
f5cc7b80 | 1482 | int btrfs_inode_delayed_dir_index_count(struct btrfs_inode *inode) |
16cdcec7 | 1483 | { |
f5cc7b80 | 1484 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); |
16cdcec7 MX |
1485 | |
1486 | if (!delayed_node) | |
1487 | return -ENOENT; | |
1488 | ||
1489 | /* | |
1490 | * Since we have held i_mutex of this directory, it is impossible that | |
1491 | * a new directory index is added into the delayed node and index_cnt | |
1492 | * is updated now. So we needn't lock the delayed node. | |
1493 | */ | |
2f7e33d4 MX |
1494 | if (!delayed_node->index_cnt) { |
1495 | btrfs_release_delayed_node(delayed_node); | |
16cdcec7 | 1496 | return -EINVAL; |
2f7e33d4 | 1497 | } |
16cdcec7 | 1498 | |
f5cc7b80 | 1499 | inode->index_cnt = delayed_node->index_cnt; |
2f7e33d4 MX |
1500 | btrfs_release_delayed_node(delayed_node); |
1501 | return 0; | |
16cdcec7 MX |
1502 | } |
1503 | ||
02dbfc99 OS |
1504 | bool btrfs_readdir_get_delayed_items(struct inode *inode, |
1505 | struct list_head *ins_list, | |
1506 | struct list_head *del_list) | |
16cdcec7 MX |
1507 | { |
1508 | struct btrfs_delayed_node *delayed_node; | |
1509 | struct btrfs_delayed_item *item; | |
1510 | ||
340c6ca9 | 1511 | delayed_node = btrfs_get_delayed_node(BTRFS_I(inode)); |
16cdcec7 | 1512 | if (!delayed_node) |
02dbfc99 OS |
1513 | return false; |
1514 | ||
1515 | /* | |
1516 | * We can only do one readdir with delayed items at a time because of | |
1517 | * item->readdir_list. | |
1518 | */ | |
64708539 JB |
1519 | btrfs_inode_unlock(inode, BTRFS_ILOCK_SHARED); |
1520 | btrfs_inode_lock(inode, 0); | |
16cdcec7 MX |
1521 | |
1522 | mutex_lock(&delayed_node->mutex); | |
1523 | item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1524 | while (item) { | |
089e77e1 | 1525 | refcount_inc(&item->refs); |
16cdcec7 MX |
1526 | list_add_tail(&item->readdir_list, ins_list); |
1527 | item = __btrfs_next_delayed_item(item); | |
1528 | } | |
1529 | ||
1530 | item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1531 | while (item) { | |
089e77e1 | 1532 | refcount_inc(&item->refs); |
16cdcec7 MX |
1533 | list_add_tail(&item->readdir_list, del_list); |
1534 | item = __btrfs_next_delayed_item(item); | |
1535 | } | |
1536 | mutex_unlock(&delayed_node->mutex); | |
1537 | /* | |
1538 | * This delayed node is still cached in the btrfs inode, so refs | |
1539 | * must be > 1 now, and we needn't check it is going to be freed | |
1540 | * or not. | |
1541 | * | |
1542 | * Besides that, this function is used to read dir, we do not | |
1543 | * insert/delete delayed items in this period. So we also needn't | |
1544 | * requeue or dequeue this delayed node. | |
1545 | */ | |
6de5f18e | 1546 | refcount_dec(&delayed_node->refs); |
02dbfc99 OS |
1547 | |
1548 | return true; | |
16cdcec7 MX |
1549 | } |
1550 | ||
02dbfc99 OS |
1551 | void btrfs_readdir_put_delayed_items(struct inode *inode, |
1552 | struct list_head *ins_list, | |
1553 | struct list_head *del_list) | |
16cdcec7 MX |
1554 | { |
1555 | struct btrfs_delayed_item *curr, *next; | |
1556 | ||
1557 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1558 | list_del(&curr->readdir_list); | |
089e77e1 | 1559 | if (refcount_dec_and_test(&curr->refs)) |
16cdcec7 MX |
1560 | kfree(curr); |
1561 | } | |
1562 | ||
1563 | list_for_each_entry_safe(curr, next, del_list, readdir_list) { | |
1564 | list_del(&curr->readdir_list); | |
089e77e1 | 1565 | if (refcount_dec_and_test(&curr->refs)) |
16cdcec7 MX |
1566 | kfree(curr); |
1567 | } | |
02dbfc99 OS |
1568 | |
1569 | /* | |
1570 | * The VFS is going to do up_read(), so we need to downgrade back to a | |
1571 | * read lock. | |
1572 | */ | |
1573 | downgrade_write(&inode->i_rwsem); | |
16cdcec7 MX |
1574 | } |
1575 | ||
1576 | int btrfs_should_delete_dir_index(struct list_head *del_list, | |
1577 | u64 index) | |
1578 | { | |
e4fd493c JB |
1579 | struct btrfs_delayed_item *curr; |
1580 | int ret = 0; | |
16cdcec7 | 1581 | |
e4fd493c | 1582 | list_for_each_entry(curr, del_list, readdir_list) { |
16cdcec7 MX |
1583 | if (curr->key.offset > index) |
1584 | break; | |
e4fd493c JB |
1585 | if (curr->key.offset == index) { |
1586 | ret = 1; | |
1587 | break; | |
1588 | } | |
16cdcec7 | 1589 | } |
e4fd493c | 1590 | return ret; |
16cdcec7 MX |
1591 | } |
1592 | ||
1593 | /* | |
1594 | * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree | |
1595 | * | |
1596 | */ | |
9cdda8d3 | 1597 | int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, |
d2fbb2b5 | 1598 | struct list_head *ins_list) |
16cdcec7 MX |
1599 | { |
1600 | struct btrfs_dir_item *di; | |
1601 | struct btrfs_delayed_item *curr, *next; | |
1602 | struct btrfs_key location; | |
1603 | char *name; | |
1604 | int name_len; | |
1605 | int over = 0; | |
1606 | unsigned char d_type; | |
1607 | ||
1608 | if (list_empty(ins_list)) | |
1609 | return 0; | |
1610 | ||
1611 | /* | |
1612 | * Changing the data of the delayed item is impossible. So | |
1613 | * we needn't lock them. And we have held i_mutex of the | |
1614 | * directory, nobody can delete any directory indexes now. | |
1615 | */ | |
1616 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1617 | list_del(&curr->readdir_list); | |
1618 | ||
9cdda8d3 | 1619 | if (curr->key.offset < ctx->pos) { |
089e77e1 | 1620 | if (refcount_dec_and_test(&curr->refs)) |
16cdcec7 MX |
1621 | kfree(curr); |
1622 | continue; | |
1623 | } | |
1624 | ||
9cdda8d3 | 1625 | ctx->pos = curr->key.offset; |
16cdcec7 MX |
1626 | |
1627 | di = (struct btrfs_dir_item *)curr->data; | |
1628 | name = (char *)(di + 1); | |
3cae210f | 1629 | name_len = btrfs_stack_dir_name_len(di); |
16cdcec7 | 1630 | |
7d157c3d | 1631 | d_type = fs_ftype_to_dtype(di->type); |
16cdcec7 MX |
1632 | btrfs_disk_key_to_cpu(&location, &di->location); |
1633 | ||
9cdda8d3 | 1634 | over = !dir_emit(ctx, name, name_len, |
16cdcec7 MX |
1635 | location.objectid, d_type); |
1636 | ||
089e77e1 | 1637 | if (refcount_dec_and_test(&curr->refs)) |
16cdcec7 MX |
1638 | kfree(curr); |
1639 | ||
1640 | if (over) | |
1641 | return 1; | |
42e9cc46 | 1642 | ctx->pos++; |
16cdcec7 MX |
1643 | } |
1644 | return 0; | |
1645 | } | |
1646 | ||
16cdcec7 MX |
1647 | static void fill_stack_inode_item(struct btrfs_trans_handle *trans, |
1648 | struct btrfs_inode_item *inode_item, | |
1649 | struct inode *inode) | |
1650 | { | |
77eea05e BB |
1651 | u64 flags; |
1652 | ||
2f2f43d3 EB |
1653 | btrfs_set_stack_inode_uid(inode_item, i_uid_read(inode)); |
1654 | btrfs_set_stack_inode_gid(inode_item, i_gid_read(inode)); | |
16cdcec7 MX |
1655 | btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size); |
1656 | btrfs_set_stack_inode_mode(inode_item, inode->i_mode); | |
1657 | btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink); | |
1658 | btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode)); | |
1659 | btrfs_set_stack_inode_generation(inode_item, | |
1660 | BTRFS_I(inode)->generation); | |
c7f88c4e JL |
1661 | btrfs_set_stack_inode_sequence(inode_item, |
1662 | inode_peek_iversion(inode)); | |
16cdcec7 MX |
1663 | btrfs_set_stack_inode_transid(inode_item, trans->transid); |
1664 | btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev); | |
77eea05e BB |
1665 | flags = btrfs_inode_combine_flags(BTRFS_I(inode)->flags, |
1666 | BTRFS_I(inode)->ro_flags); | |
1667 | btrfs_set_stack_inode_flags(inode_item, flags); | |
ff5714cc | 1668 | btrfs_set_stack_inode_block_group(inode_item, 0); |
16cdcec7 | 1669 | |
a937b979 | 1670 | btrfs_set_stack_timespec_sec(&inode_item->atime, |
16cdcec7 | 1671 | inode->i_atime.tv_sec); |
a937b979 | 1672 | btrfs_set_stack_timespec_nsec(&inode_item->atime, |
16cdcec7 MX |
1673 | inode->i_atime.tv_nsec); |
1674 | ||
a937b979 | 1675 | btrfs_set_stack_timespec_sec(&inode_item->mtime, |
16cdcec7 | 1676 | inode->i_mtime.tv_sec); |
a937b979 | 1677 | btrfs_set_stack_timespec_nsec(&inode_item->mtime, |
16cdcec7 MX |
1678 | inode->i_mtime.tv_nsec); |
1679 | ||
a937b979 | 1680 | btrfs_set_stack_timespec_sec(&inode_item->ctime, |
16cdcec7 | 1681 | inode->i_ctime.tv_sec); |
a937b979 | 1682 | btrfs_set_stack_timespec_nsec(&inode_item->ctime, |
16cdcec7 | 1683 | inode->i_ctime.tv_nsec); |
9cc97d64 | 1684 | |
1685 | btrfs_set_stack_timespec_sec(&inode_item->otime, | |
1686 | BTRFS_I(inode)->i_otime.tv_sec); | |
1687 | btrfs_set_stack_timespec_nsec(&inode_item->otime, | |
1688 | BTRFS_I(inode)->i_otime.tv_nsec); | |
16cdcec7 MX |
1689 | } |
1690 | ||
2f7e33d4 MX |
1691 | int btrfs_fill_inode(struct inode *inode, u32 *rdev) |
1692 | { | |
9ddc959e | 1693 | struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info; |
2f7e33d4 MX |
1694 | struct btrfs_delayed_node *delayed_node; |
1695 | struct btrfs_inode_item *inode_item; | |
2f7e33d4 | 1696 | |
340c6ca9 | 1697 | delayed_node = btrfs_get_delayed_node(BTRFS_I(inode)); |
2f7e33d4 MX |
1698 | if (!delayed_node) |
1699 | return -ENOENT; | |
1700 | ||
1701 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1702 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
2f7e33d4 MX |
1703 | mutex_unlock(&delayed_node->mutex); |
1704 | btrfs_release_delayed_node(delayed_node); | |
1705 | return -ENOENT; | |
1706 | } | |
1707 | ||
1708 | inode_item = &delayed_node->inode_item; | |
1709 | ||
2f2f43d3 EB |
1710 | i_uid_write(inode, btrfs_stack_inode_uid(inode_item)); |
1711 | i_gid_write(inode, btrfs_stack_inode_gid(inode_item)); | |
6ef06d27 | 1712 | btrfs_i_size_write(BTRFS_I(inode), btrfs_stack_inode_size(inode_item)); |
9ddc959e JB |
1713 | btrfs_inode_set_file_extent_range(BTRFS_I(inode), 0, |
1714 | round_up(i_size_read(inode), fs_info->sectorsize)); | |
2f7e33d4 | 1715 | inode->i_mode = btrfs_stack_inode_mode(inode_item); |
bfe86848 | 1716 | set_nlink(inode, btrfs_stack_inode_nlink(inode_item)); |
2f7e33d4 MX |
1717 | inode_set_bytes(inode, btrfs_stack_inode_nbytes(inode_item)); |
1718 | BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item); | |
6e17d30b YD |
1719 | BTRFS_I(inode)->last_trans = btrfs_stack_inode_transid(inode_item); |
1720 | ||
c7f88c4e JL |
1721 | inode_set_iversion_queried(inode, |
1722 | btrfs_stack_inode_sequence(inode_item)); | |
2f7e33d4 MX |
1723 | inode->i_rdev = 0; |
1724 | *rdev = btrfs_stack_inode_rdev(inode_item); | |
77eea05e BB |
1725 | btrfs_inode_split_flags(btrfs_stack_inode_flags(inode_item), |
1726 | &BTRFS_I(inode)->flags, &BTRFS_I(inode)->ro_flags); | |
2f7e33d4 | 1727 | |
a937b979 DS |
1728 | inode->i_atime.tv_sec = btrfs_stack_timespec_sec(&inode_item->atime); |
1729 | inode->i_atime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->atime); | |
2f7e33d4 | 1730 | |
a937b979 DS |
1731 | inode->i_mtime.tv_sec = btrfs_stack_timespec_sec(&inode_item->mtime); |
1732 | inode->i_mtime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->mtime); | |
2f7e33d4 | 1733 | |
a937b979 DS |
1734 | inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(&inode_item->ctime); |
1735 | inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->ctime); | |
2f7e33d4 | 1736 | |
9cc97d64 | 1737 | BTRFS_I(inode)->i_otime.tv_sec = |
1738 | btrfs_stack_timespec_sec(&inode_item->otime); | |
1739 | BTRFS_I(inode)->i_otime.tv_nsec = | |
1740 | btrfs_stack_timespec_nsec(&inode_item->otime); | |
1741 | ||
2f7e33d4 MX |
1742 | inode->i_generation = BTRFS_I(inode)->generation; |
1743 | BTRFS_I(inode)->index_cnt = (u64)-1; | |
1744 | ||
1745 | mutex_unlock(&delayed_node->mutex); | |
1746 | btrfs_release_delayed_node(delayed_node); | |
1747 | return 0; | |
1748 | } | |
1749 | ||
16cdcec7 | 1750 | int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, |
f3fbcaef NB |
1751 | struct btrfs_root *root, |
1752 | struct btrfs_inode *inode) | |
16cdcec7 MX |
1753 | { |
1754 | struct btrfs_delayed_node *delayed_node; | |
aa0467d8 | 1755 | int ret = 0; |
16cdcec7 | 1756 | |
f3fbcaef | 1757 | delayed_node = btrfs_get_or_create_delayed_node(inode); |
16cdcec7 MX |
1758 | if (IS_ERR(delayed_node)) |
1759 | return PTR_ERR(delayed_node); | |
1760 | ||
1761 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1762 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
f3fbcaef NB |
1763 | fill_stack_inode_item(trans, &delayed_node->inode_item, |
1764 | &inode->vfs_inode); | |
16cdcec7 MX |
1765 | goto release_node; |
1766 | } | |
1767 | ||
8e3c9d3c | 1768 | ret = btrfs_delayed_inode_reserve_metadata(trans, root, delayed_node); |
c06a0e12 JB |
1769 | if (ret) |
1770 | goto release_node; | |
16cdcec7 | 1771 | |
f3fbcaef | 1772 | fill_stack_inode_item(trans, &delayed_node->inode_item, &inode->vfs_inode); |
7cf35d91 | 1773 | set_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); |
16cdcec7 MX |
1774 | delayed_node->count++; |
1775 | atomic_inc(&root->fs_info->delayed_root->items); | |
1776 | release_node: | |
1777 | mutex_unlock(&delayed_node->mutex); | |
1778 | btrfs_release_delayed_node(delayed_node); | |
1779 | return ret; | |
1780 | } | |
1781 | ||
e07222c7 | 1782 | int btrfs_delayed_delete_inode_ref(struct btrfs_inode *inode) |
67de1176 | 1783 | { |
3ffbd68c | 1784 | struct btrfs_fs_info *fs_info = inode->root->fs_info; |
67de1176 MX |
1785 | struct btrfs_delayed_node *delayed_node; |
1786 | ||
6f896054 CM |
1787 | /* |
1788 | * we don't do delayed inode updates during log recovery because it | |
1789 | * leads to enospc problems. This means we also can't do | |
1790 | * delayed inode refs | |
1791 | */ | |
0b246afa | 1792 | if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) |
6f896054 CM |
1793 | return -EAGAIN; |
1794 | ||
e07222c7 | 1795 | delayed_node = btrfs_get_or_create_delayed_node(inode); |
67de1176 MX |
1796 | if (IS_ERR(delayed_node)) |
1797 | return PTR_ERR(delayed_node); | |
1798 | ||
1799 | /* | |
1800 | * We don't reserve space for inode ref deletion is because: | |
1801 | * - We ONLY do async inode ref deletion for the inode who has only | |
1802 | * one link(i_nlink == 1), it means there is only one inode ref. | |
1803 | * And in most case, the inode ref and the inode item are in the | |
1804 | * same leaf, and we will deal with them at the same time. | |
1805 | * Since we are sure we will reserve the space for the inode item, | |
1806 | * it is unnecessary to reserve space for inode ref deletion. | |
1807 | * - If the inode ref and the inode item are not in the same leaf, | |
1808 | * We also needn't worry about enospc problem, because we reserve | |
1809 | * much more space for the inode update than it needs. | |
1810 | * - At the worst, we can steal some space from the global reservation. | |
1811 | * It is very rare. | |
1812 | */ | |
1813 | mutex_lock(&delayed_node->mutex); | |
1814 | if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) | |
1815 | goto release_node; | |
1816 | ||
1817 | set_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); | |
1818 | delayed_node->count++; | |
0b246afa | 1819 | atomic_inc(&fs_info->delayed_root->items); |
67de1176 MX |
1820 | release_node: |
1821 | mutex_unlock(&delayed_node->mutex); | |
1822 | btrfs_release_delayed_node(delayed_node); | |
1823 | return 0; | |
1824 | } | |
1825 | ||
16cdcec7 MX |
1826 | static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) |
1827 | { | |
1828 | struct btrfs_root *root = delayed_node->root; | |
2ff7e61e | 1829 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
1830 | struct btrfs_delayed_item *curr_item, *prev_item; |
1831 | ||
1832 | mutex_lock(&delayed_node->mutex); | |
1833 | curr_item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1834 | while (curr_item) { | |
4f5427cc | 1835 | btrfs_delayed_item_release_metadata(root, curr_item); |
16cdcec7 MX |
1836 | prev_item = curr_item; |
1837 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1838 | btrfs_release_delayed_item(prev_item); | |
1839 | } | |
1840 | ||
1841 | curr_item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1842 | while (curr_item) { | |
4f5427cc | 1843 | btrfs_delayed_item_release_metadata(root, curr_item); |
16cdcec7 MX |
1844 | prev_item = curr_item; |
1845 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1846 | btrfs_release_delayed_item(prev_item); | |
1847 | } | |
1848 | ||
a4cb90dc | 1849 | btrfs_release_delayed_iref(delayed_node); |
67de1176 | 1850 | |
7cf35d91 | 1851 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
4f5427cc | 1852 | btrfs_delayed_inode_release_metadata(fs_info, delayed_node, false); |
16cdcec7 MX |
1853 | btrfs_release_delayed_inode(delayed_node); |
1854 | } | |
1855 | mutex_unlock(&delayed_node->mutex); | |
1856 | } | |
1857 | ||
4ccb5c72 | 1858 | void btrfs_kill_delayed_inode_items(struct btrfs_inode *inode) |
16cdcec7 MX |
1859 | { |
1860 | struct btrfs_delayed_node *delayed_node; | |
1861 | ||
4ccb5c72 | 1862 | delayed_node = btrfs_get_delayed_node(inode); |
16cdcec7 MX |
1863 | if (!delayed_node) |
1864 | return; | |
1865 | ||
1866 | __btrfs_kill_delayed_node(delayed_node); | |
1867 | btrfs_release_delayed_node(delayed_node); | |
1868 | } | |
1869 | ||
1870 | void btrfs_kill_all_delayed_nodes(struct btrfs_root *root) | |
1871 | { | |
1872 | u64 inode_id = 0; | |
1873 | struct btrfs_delayed_node *delayed_nodes[8]; | |
1874 | int i, n; | |
1875 | ||
1876 | while (1) { | |
1877 | spin_lock(&root->inode_lock); | |
1878 | n = radix_tree_gang_lookup(&root->delayed_nodes_tree, | |
1879 | (void **)delayed_nodes, inode_id, | |
1880 | ARRAY_SIZE(delayed_nodes)); | |
1881 | if (!n) { | |
1882 | spin_unlock(&root->inode_lock); | |
1883 | break; | |
1884 | } | |
1885 | ||
1886 | inode_id = delayed_nodes[n - 1]->inode_id + 1; | |
baf320b9 JB |
1887 | for (i = 0; i < n; i++) { |
1888 | /* | |
1889 | * Don't increase refs in case the node is dead and | |
1890 | * about to be removed from the tree in the loop below | |
1891 | */ | |
1892 | if (!refcount_inc_not_zero(&delayed_nodes[i]->refs)) | |
1893 | delayed_nodes[i] = NULL; | |
1894 | } | |
16cdcec7 MX |
1895 | spin_unlock(&root->inode_lock); |
1896 | ||
1897 | for (i = 0; i < n; i++) { | |
baf320b9 JB |
1898 | if (!delayed_nodes[i]) |
1899 | continue; | |
16cdcec7 MX |
1900 | __btrfs_kill_delayed_node(delayed_nodes[i]); |
1901 | btrfs_release_delayed_node(delayed_nodes[i]); | |
1902 | } | |
1903 | } | |
1904 | } | |
67cde344 | 1905 | |
ccdf9b30 | 1906 | void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info) |
67cde344 | 1907 | { |
67cde344 MX |
1908 | struct btrfs_delayed_node *curr_node, *prev_node; |
1909 | ||
ccdf9b30 | 1910 | curr_node = btrfs_first_delayed_node(fs_info->delayed_root); |
67cde344 MX |
1911 | while (curr_node) { |
1912 | __btrfs_kill_delayed_node(curr_node); | |
1913 | ||
1914 | prev_node = curr_node; | |
1915 | curr_node = btrfs_next_delayed_node(curr_node); | |
1916 | btrfs_release_delayed_node(prev_node); | |
1917 | } | |
1918 | } | |
1919 |