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16cdcec7 MX |
1 | /* |
2 | * Copyright (C) 2011 Fujitsu. All rights reserved. | |
3 | * Written by Miao Xie <miaox@cn.fujitsu.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public | |
7 | * License v2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public | |
15 | * License along with this program; if not, write to the | |
16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | * Boston, MA 021110-1307, USA. | |
18 | */ | |
19 | ||
20 | #include <linux/slab.h> | |
21 | #include "delayed-inode.h" | |
22 | #include "disk-io.h" | |
23 | #include "transaction.h" | |
3cae210f | 24 | #include "ctree.h" |
16cdcec7 | 25 | |
de3cb945 CM |
26 | #define BTRFS_DELAYED_WRITEBACK 512 |
27 | #define BTRFS_DELAYED_BACKGROUND 128 | |
28 | #define BTRFS_DELAYED_BATCH 16 | |
16cdcec7 MX |
29 | |
30 | static struct kmem_cache *delayed_node_cache; | |
31 | ||
32 | int __init btrfs_delayed_inode_init(void) | |
33 | { | |
837e1972 | 34 | delayed_node_cache = kmem_cache_create("btrfs_delayed_node", |
16cdcec7 MX |
35 | sizeof(struct btrfs_delayed_node), |
36 | 0, | |
fba4b697 | 37 | SLAB_MEM_SPREAD, |
16cdcec7 MX |
38 | NULL); |
39 | if (!delayed_node_cache) | |
40 | return -ENOMEM; | |
41 | return 0; | |
42 | } | |
43 | ||
44 | void btrfs_delayed_inode_exit(void) | |
45 | { | |
5598e900 | 46 | kmem_cache_destroy(delayed_node_cache); |
16cdcec7 MX |
47 | } |
48 | ||
49 | static inline void btrfs_init_delayed_node( | |
50 | struct btrfs_delayed_node *delayed_node, | |
51 | struct btrfs_root *root, u64 inode_id) | |
52 | { | |
53 | delayed_node->root = root; | |
54 | delayed_node->inode_id = inode_id; | |
55 | atomic_set(&delayed_node->refs, 0); | |
16cdcec7 MX |
56 | delayed_node->ins_root = RB_ROOT; |
57 | delayed_node->del_root = RB_ROOT; | |
58 | mutex_init(&delayed_node->mutex); | |
16cdcec7 MX |
59 | INIT_LIST_HEAD(&delayed_node->n_list); |
60 | INIT_LIST_HEAD(&delayed_node->p_list); | |
16cdcec7 MX |
61 | } |
62 | ||
63 | static inline int btrfs_is_continuous_delayed_item( | |
64 | struct btrfs_delayed_item *item1, | |
65 | struct btrfs_delayed_item *item2) | |
66 | { | |
67 | if (item1->key.type == BTRFS_DIR_INDEX_KEY && | |
68 | item1->key.objectid == item2->key.objectid && | |
69 | item1->key.type == item2->key.type && | |
70 | item1->key.offset + 1 == item2->key.offset) | |
71 | return 1; | |
72 | return 0; | |
73 | } | |
74 | ||
2f7e33d4 | 75 | static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode) |
16cdcec7 | 76 | { |
16cdcec7 MX |
77 | struct btrfs_inode *btrfs_inode = BTRFS_I(inode); |
78 | struct btrfs_root *root = btrfs_inode->root; | |
0d0ca30f | 79 | u64 ino = btrfs_ino(inode); |
2f7e33d4 | 80 | struct btrfs_delayed_node *node; |
16cdcec7 | 81 | |
16cdcec7 MX |
82 | node = ACCESS_ONCE(btrfs_inode->delayed_node); |
83 | if (node) { | |
2f7e33d4 | 84 | atomic_inc(&node->refs); |
16cdcec7 MX |
85 | return node; |
86 | } | |
87 | ||
88 | spin_lock(&root->inode_lock); | |
0d0ca30f | 89 | node = radix_tree_lookup(&root->delayed_nodes_tree, ino); |
16cdcec7 MX |
90 | if (node) { |
91 | if (btrfs_inode->delayed_node) { | |
2f7e33d4 MX |
92 | atomic_inc(&node->refs); /* can be accessed */ |
93 | BUG_ON(btrfs_inode->delayed_node != node); | |
16cdcec7 | 94 | spin_unlock(&root->inode_lock); |
2f7e33d4 | 95 | return node; |
16cdcec7 MX |
96 | } |
97 | btrfs_inode->delayed_node = node; | |
95e94d14 R |
98 | /* can be accessed and cached in the inode */ |
99 | atomic_add(2, &node->refs); | |
16cdcec7 MX |
100 | spin_unlock(&root->inode_lock); |
101 | return node; | |
102 | } | |
103 | spin_unlock(&root->inode_lock); | |
104 | ||
2f7e33d4 MX |
105 | return NULL; |
106 | } | |
107 | ||
79787eaa | 108 | /* Will return either the node or PTR_ERR(-ENOMEM) */ |
2f7e33d4 MX |
109 | static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node( |
110 | struct inode *inode) | |
111 | { | |
112 | struct btrfs_delayed_node *node; | |
113 | struct btrfs_inode *btrfs_inode = BTRFS_I(inode); | |
114 | struct btrfs_root *root = btrfs_inode->root; | |
115 | u64 ino = btrfs_ino(inode); | |
116 | int ret; | |
117 | ||
118 | again: | |
119 | node = btrfs_get_delayed_node(inode); | |
120 | if (node) | |
121 | return node; | |
122 | ||
352dd9c8 | 123 | node = kmem_cache_zalloc(delayed_node_cache, GFP_NOFS); |
16cdcec7 MX |
124 | if (!node) |
125 | return ERR_PTR(-ENOMEM); | |
0d0ca30f | 126 | btrfs_init_delayed_node(node, root, ino); |
16cdcec7 | 127 | |
95e94d14 R |
128 | /* cached in the btrfs inode and can be accessed */ |
129 | atomic_add(2, &node->refs); | |
16cdcec7 | 130 | |
e1860a77 | 131 | ret = radix_tree_preload(GFP_NOFS); |
16cdcec7 MX |
132 | if (ret) { |
133 | kmem_cache_free(delayed_node_cache, node); | |
134 | return ERR_PTR(ret); | |
135 | } | |
136 | ||
137 | spin_lock(&root->inode_lock); | |
0d0ca30f | 138 | ret = radix_tree_insert(&root->delayed_nodes_tree, ino, node); |
16cdcec7 | 139 | if (ret == -EEXIST) { |
16cdcec7 | 140 | spin_unlock(&root->inode_lock); |
96493031 | 141 | kmem_cache_free(delayed_node_cache, node); |
16cdcec7 MX |
142 | radix_tree_preload_end(); |
143 | goto again; | |
144 | } | |
145 | btrfs_inode->delayed_node = node; | |
146 | spin_unlock(&root->inode_lock); | |
147 | radix_tree_preload_end(); | |
148 | ||
149 | return node; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Call it when holding delayed_node->mutex | |
154 | * | |
155 | * If mod = 1, add this node into the prepared list. | |
156 | */ | |
157 | static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root, | |
158 | struct btrfs_delayed_node *node, | |
159 | int mod) | |
160 | { | |
161 | spin_lock(&root->lock); | |
7cf35d91 | 162 | if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
16cdcec7 MX |
163 | if (!list_empty(&node->p_list)) |
164 | list_move_tail(&node->p_list, &root->prepare_list); | |
165 | else if (mod) | |
166 | list_add_tail(&node->p_list, &root->prepare_list); | |
167 | } else { | |
168 | list_add_tail(&node->n_list, &root->node_list); | |
169 | list_add_tail(&node->p_list, &root->prepare_list); | |
170 | atomic_inc(&node->refs); /* inserted into list */ | |
171 | root->nodes++; | |
7cf35d91 | 172 | set_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); |
16cdcec7 MX |
173 | } |
174 | spin_unlock(&root->lock); | |
175 | } | |
176 | ||
177 | /* Call it when holding delayed_node->mutex */ | |
178 | static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root, | |
179 | struct btrfs_delayed_node *node) | |
180 | { | |
181 | spin_lock(&root->lock); | |
7cf35d91 | 182 | if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
16cdcec7 MX |
183 | root->nodes--; |
184 | atomic_dec(&node->refs); /* not in the list */ | |
185 | list_del_init(&node->n_list); | |
186 | if (!list_empty(&node->p_list)) | |
187 | list_del_init(&node->p_list); | |
7cf35d91 | 188 | clear_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); |
16cdcec7 MX |
189 | } |
190 | spin_unlock(&root->lock); | |
191 | } | |
192 | ||
48a3b636 | 193 | static struct btrfs_delayed_node *btrfs_first_delayed_node( |
16cdcec7 MX |
194 | struct btrfs_delayed_root *delayed_root) |
195 | { | |
196 | struct list_head *p; | |
197 | struct btrfs_delayed_node *node = NULL; | |
198 | ||
199 | spin_lock(&delayed_root->lock); | |
200 | if (list_empty(&delayed_root->node_list)) | |
201 | goto out; | |
202 | ||
203 | p = delayed_root->node_list.next; | |
204 | node = list_entry(p, struct btrfs_delayed_node, n_list); | |
205 | atomic_inc(&node->refs); | |
206 | out: | |
207 | spin_unlock(&delayed_root->lock); | |
208 | ||
209 | return node; | |
210 | } | |
211 | ||
48a3b636 | 212 | static struct btrfs_delayed_node *btrfs_next_delayed_node( |
16cdcec7 MX |
213 | struct btrfs_delayed_node *node) |
214 | { | |
215 | struct btrfs_delayed_root *delayed_root; | |
216 | struct list_head *p; | |
217 | struct btrfs_delayed_node *next = NULL; | |
218 | ||
219 | delayed_root = node->root->fs_info->delayed_root; | |
220 | spin_lock(&delayed_root->lock); | |
7cf35d91 MX |
221 | if (!test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { |
222 | /* not in the list */ | |
16cdcec7 MX |
223 | if (list_empty(&delayed_root->node_list)) |
224 | goto out; | |
225 | p = delayed_root->node_list.next; | |
226 | } else if (list_is_last(&node->n_list, &delayed_root->node_list)) | |
227 | goto out; | |
228 | else | |
229 | p = node->n_list.next; | |
230 | ||
231 | next = list_entry(p, struct btrfs_delayed_node, n_list); | |
232 | atomic_inc(&next->refs); | |
233 | out: | |
234 | spin_unlock(&delayed_root->lock); | |
235 | ||
236 | return next; | |
237 | } | |
238 | ||
239 | static void __btrfs_release_delayed_node( | |
240 | struct btrfs_delayed_node *delayed_node, | |
241 | int mod) | |
242 | { | |
243 | struct btrfs_delayed_root *delayed_root; | |
244 | ||
245 | if (!delayed_node) | |
246 | return; | |
247 | ||
248 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
249 | ||
250 | mutex_lock(&delayed_node->mutex); | |
251 | if (delayed_node->count) | |
252 | btrfs_queue_delayed_node(delayed_root, delayed_node, mod); | |
253 | else | |
254 | btrfs_dequeue_delayed_node(delayed_root, delayed_node); | |
255 | mutex_unlock(&delayed_node->mutex); | |
256 | ||
257 | if (atomic_dec_and_test(&delayed_node->refs)) { | |
96493031 | 258 | bool free = false; |
16cdcec7 MX |
259 | struct btrfs_root *root = delayed_node->root; |
260 | spin_lock(&root->inode_lock); | |
261 | if (atomic_read(&delayed_node->refs) == 0) { | |
262 | radix_tree_delete(&root->delayed_nodes_tree, | |
263 | delayed_node->inode_id); | |
96493031 | 264 | free = true; |
16cdcec7 MX |
265 | } |
266 | spin_unlock(&root->inode_lock); | |
96493031 JM |
267 | if (free) |
268 | kmem_cache_free(delayed_node_cache, delayed_node); | |
16cdcec7 MX |
269 | } |
270 | } | |
271 | ||
272 | static inline void btrfs_release_delayed_node(struct btrfs_delayed_node *node) | |
273 | { | |
274 | __btrfs_release_delayed_node(node, 0); | |
275 | } | |
276 | ||
48a3b636 | 277 | static struct btrfs_delayed_node *btrfs_first_prepared_delayed_node( |
16cdcec7 MX |
278 | struct btrfs_delayed_root *delayed_root) |
279 | { | |
280 | struct list_head *p; | |
281 | struct btrfs_delayed_node *node = NULL; | |
282 | ||
283 | spin_lock(&delayed_root->lock); | |
284 | if (list_empty(&delayed_root->prepare_list)) | |
285 | goto out; | |
286 | ||
287 | p = delayed_root->prepare_list.next; | |
288 | list_del_init(p); | |
289 | node = list_entry(p, struct btrfs_delayed_node, p_list); | |
290 | atomic_inc(&node->refs); | |
291 | out: | |
292 | spin_unlock(&delayed_root->lock); | |
293 | ||
294 | return node; | |
295 | } | |
296 | ||
297 | static inline void btrfs_release_prepared_delayed_node( | |
298 | struct btrfs_delayed_node *node) | |
299 | { | |
300 | __btrfs_release_delayed_node(node, 1); | |
301 | } | |
302 | ||
48a3b636 | 303 | static struct btrfs_delayed_item *btrfs_alloc_delayed_item(u32 data_len) |
16cdcec7 MX |
304 | { |
305 | struct btrfs_delayed_item *item; | |
306 | item = kmalloc(sizeof(*item) + data_len, GFP_NOFS); | |
307 | if (item) { | |
308 | item->data_len = data_len; | |
309 | item->ins_or_del = 0; | |
310 | item->bytes_reserved = 0; | |
16cdcec7 MX |
311 | item->delayed_node = NULL; |
312 | atomic_set(&item->refs, 1); | |
313 | } | |
314 | return item; | |
315 | } | |
316 | ||
317 | /* | |
318 | * __btrfs_lookup_delayed_item - look up the delayed item by key | |
319 | * @delayed_node: pointer to the delayed node | |
320 | * @key: the key to look up | |
321 | * @prev: used to store the prev item if the right item isn't found | |
322 | * @next: used to store the next item if the right item isn't found | |
323 | * | |
324 | * Note: if we don't find the right item, we will return the prev item and | |
325 | * the next item. | |
326 | */ | |
327 | static struct btrfs_delayed_item *__btrfs_lookup_delayed_item( | |
328 | struct rb_root *root, | |
329 | struct btrfs_key *key, | |
330 | struct btrfs_delayed_item **prev, | |
331 | struct btrfs_delayed_item **next) | |
332 | { | |
333 | struct rb_node *node, *prev_node = NULL; | |
334 | struct btrfs_delayed_item *delayed_item = NULL; | |
335 | int ret = 0; | |
336 | ||
337 | node = root->rb_node; | |
338 | ||
339 | while (node) { | |
340 | delayed_item = rb_entry(node, struct btrfs_delayed_item, | |
341 | rb_node); | |
342 | prev_node = node; | |
343 | ret = btrfs_comp_cpu_keys(&delayed_item->key, key); | |
344 | if (ret < 0) | |
345 | node = node->rb_right; | |
346 | else if (ret > 0) | |
347 | node = node->rb_left; | |
348 | else | |
349 | return delayed_item; | |
350 | } | |
351 | ||
352 | if (prev) { | |
353 | if (!prev_node) | |
354 | *prev = NULL; | |
355 | else if (ret < 0) | |
356 | *prev = delayed_item; | |
357 | else if ((node = rb_prev(prev_node)) != NULL) { | |
358 | *prev = rb_entry(node, struct btrfs_delayed_item, | |
359 | rb_node); | |
360 | } else | |
361 | *prev = NULL; | |
362 | } | |
363 | ||
364 | if (next) { | |
365 | if (!prev_node) | |
366 | *next = NULL; | |
367 | else if (ret > 0) | |
368 | *next = delayed_item; | |
369 | else if ((node = rb_next(prev_node)) != NULL) { | |
370 | *next = rb_entry(node, struct btrfs_delayed_item, | |
371 | rb_node); | |
372 | } else | |
373 | *next = NULL; | |
374 | } | |
375 | return NULL; | |
376 | } | |
377 | ||
48a3b636 | 378 | static struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item( |
16cdcec7 MX |
379 | struct btrfs_delayed_node *delayed_node, |
380 | struct btrfs_key *key) | |
381 | { | |
e2c89907 | 382 | return __btrfs_lookup_delayed_item(&delayed_node->ins_root, key, |
16cdcec7 | 383 | NULL, NULL); |
16cdcec7 MX |
384 | } |
385 | ||
16cdcec7 MX |
386 | static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node, |
387 | struct btrfs_delayed_item *ins, | |
388 | int action) | |
389 | { | |
390 | struct rb_node **p, *node; | |
391 | struct rb_node *parent_node = NULL; | |
392 | struct rb_root *root; | |
393 | struct btrfs_delayed_item *item; | |
394 | int cmp; | |
395 | ||
396 | if (action == BTRFS_DELAYED_INSERTION_ITEM) | |
397 | root = &delayed_node->ins_root; | |
398 | else if (action == BTRFS_DELAYED_DELETION_ITEM) | |
399 | root = &delayed_node->del_root; | |
400 | else | |
401 | BUG(); | |
402 | p = &root->rb_node; | |
403 | node = &ins->rb_node; | |
404 | ||
405 | while (*p) { | |
406 | parent_node = *p; | |
407 | item = rb_entry(parent_node, struct btrfs_delayed_item, | |
408 | rb_node); | |
409 | ||
410 | cmp = btrfs_comp_cpu_keys(&item->key, &ins->key); | |
411 | if (cmp < 0) | |
412 | p = &(*p)->rb_right; | |
413 | else if (cmp > 0) | |
414 | p = &(*p)->rb_left; | |
415 | else | |
416 | return -EEXIST; | |
417 | } | |
418 | ||
419 | rb_link_node(node, parent_node, p); | |
420 | rb_insert_color(node, root); | |
421 | ins->delayed_node = delayed_node; | |
422 | ins->ins_or_del = action; | |
423 | ||
424 | if (ins->key.type == BTRFS_DIR_INDEX_KEY && | |
425 | action == BTRFS_DELAYED_INSERTION_ITEM && | |
426 | ins->key.offset >= delayed_node->index_cnt) | |
427 | delayed_node->index_cnt = ins->key.offset + 1; | |
428 | ||
429 | delayed_node->count++; | |
430 | atomic_inc(&delayed_node->root->fs_info->delayed_root->items); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static int __btrfs_add_delayed_insertion_item(struct btrfs_delayed_node *node, | |
435 | struct btrfs_delayed_item *item) | |
436 | { | |
437 | return __btrfs_add_delayed_item(node, item, | |
438 | BTRFS_DELAYED_INSERTION_ITEM); | |
439 | } | |
440 | ||
441 | static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node, | |
442 | struct btrfs_delayed_item *item) | |
443 | { | |
444 | return __btrfs_add_delayed_item(node, item, | |
445 | BTRFS_DELAYED_DELETION_ITEM); | |
446 | } | |
447 | ||
de3cb945 CM |
448 | static void finish_one_item(struct btrfs_delayed_root *delayed_root) |
449 | { | |
450 | int seq = atomic_inc_return(&delayed_root->items_seq); | |
ee863954 DS |
451 | |
452 | /* | |
453 | * atomic_dec_return implies a barrier for waitqueue_active | |
454 | */ | |
de3cb945 CM |
455 | if ((atomic_dec_return(&delayed_root->items) < |
456 | BTRFS_DELAYED_BACKGROUND || seq % BTRFS_DELAYED_BATCH == 0) && | |
457 | waitqueue_active(&delayed_root->wait)) | |
458 | wake_up(&delayed_root->wait); | |
459 | } | |
460 | ||
16cdcec7 MX |
461 | static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item) |
462 | { | |
463 | struct rb_root *root; | |
464 | struct btrfs_delayed_root *delayed_root; | |
465 | ||
466 | delayed_root = delayed_item->delayed_node->root->fs_info->delayed_root; | |
467 | ||
468 | BUG_ON(!delayed_root); | |
469 | BUG_ON(delayed_item->ins_or_del != BTRFS_DELAYED_DELETION_ITEM && | |
470 | delayed_item->ins_or_del != BTRFS_DELAYED_INSERTION_ITEM); | |
471 | ||
472 | if (delayed_item->ins_or_del == BTRFS_DELAYED_INSERTION_ITEM) | |
473 | root = &delayed_item->delayed_node->ins_root; | |
474 | else | |
475 | root = &delayed_item->delayed_node->del_root; | |
476 | ||
477 | rb_erase(&delayed_item->rb_node, root); | |
478 | delayed_item->delayed_node->count--; | |
de3cb945 CM |
479 | |
480 | finish_one_item(delayed_root); | |
16cdcec7 MX |
481 | } |
482 | ||
483 | static void btrfs_release_delayed_item(struct btrfs_delayed_item *item) | |
484 | { | |
485 | if (item) { | |
486 | __btrfs_remove_delayed_item(item); | |
487 | if (atomic_dec_and_test(&item->refs)) | |
488 | kfree(item); | |
489 | } | |
490 | } | |
491 | ||
48a3b636 | 492 | static struct btrfs_delayed_item *__btrfs_first_delayed_insertion_item( |
16cdcec7 MX |
493 | struct btrfs_delayed_node *delayed_node) |
494 | { | |
495 | struct rb_node *p; | |
496 | struct btrfs_delayed_item *item = NULL; | |
497 | ||
498 | p = rb_first(&delayed_node->ins_root); | |
499 | if (p) | |
500 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
501 | ||
502 | return item; | |
503 | } | |
504 | ||
48a3b636 | 505 | static struct btrfs_delayed_item *__btrfs_first_delayed_deletion_item( |
16cdcec7 MX |
506 | struct btrfs_delayed_node *delayed_node) |
507 | { | |
508 | struct rb_node *p; | |
509 | struct btrfs_delayed_item *item = NULL; | |
510 | ||
511 | p = rb_first(&delayed_node->del_root); | |
512 | if (p) | |
513 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
514 | ||
515 | return item; | |
516 | } | |
517 | ||
48a3b636 | 518 | static struct btrfs_delayed_item *__btrfs_next_delayed_item( |
16cdcec7 MX |
519 | struct btrfs_delayed_item *item) |
520 | { | |
521 | struct rb_node *p; | |
522 | struct btrfs_delayed_item *next = NULL; | |
523 | ||
524 | p = rb_next(&item->rb_node); | |
525 | if (p) | |
526 | next = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
527 | ||
528 | return next; | |
529 | } | |
530 | ||
16cdcec7 | 531 | static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans, |
2ff7e61e | 532 | struct btrfs_fs_info *fs_info, |
16cdcec7 MX |
533 | struct btrfs_delayed_item *item) |
534 | { | |
535 | struct btrfs_block_rsv *src_rsv; | |
536 | struct btrfs_block_rsv *dst_rsv; | |
537 | u64 num_bytes; | |
538 | int ret; | |
539 | ||
540 | if (!trans->bytes_reserved) | |
541 | return 0; | |
542 | ||
543 | src_rsv = trans->block_rsv; | |
0b246afa | 544 | dst_rsv = &fs_info->delayed_block_rsv; |
16cdcec7 | 545 | |
0b246afa | 546 | num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1); |
25d609f8 | 547 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, 1); |
8c2a3ca2 | 548 | if (!ret) { |
0b246afa | 549 | trace_btrfs_space_reservation(fs_info, "delayed_item", |
8c2a3ca2 JB |
550 | item->key.objectid, |
551 | num_bytes, 1); | |
16cdcec7 | 552 | item->bytes_reserved = num_bytes; |
8c2a3ca2 | 553 | } |
16cdcec7 MX |
554 | |
555 | return ret; | |
556 | } | |
557 | ||
2ff7e61e | 558 | static void btrfs_delayed_item_release_metadata(struct btrfs_fs_info *fs_info, |
16cdcec7 MX |
559 | struct btrfs_delayed_item *item) |
560 | { | |
19fd2949 MX |
561 | struct btrfs_block_rsv *rsv; |
562 | ||
16cdcec7 MX |
563 | if (!item->bytes_reserved) |
564 | return; | |
565 | ||
0b246afa JM |
566 | rsv = &fs_info->delayed_block_rsv; |
567 | trace_btrfs_space_reservation(fs_info, "delayed_item", | |
8c2a3ca2 JB |
568 | item->key.objectid, item->bytes_reserved, |
569 | 0); | |
2ff7e61e | 570 | btrfs_block_rsv_release(fs_info, rsv, |
16cdcec7 MX |
571 | item->bytes_reserved); |
572 | } | |
573 | ||
574 | static int btrfs_delayed_inode_reserve_metadata( | |
575 | struct btrfs_trans_handle *trans, | |
576 | struct btrfs_root *root, | |
7fd2ae21 | 577 | struct inode *inode, |
16cdcec7 MX |
578 | struct btrfs_delayed_node *node) |
579 | { | |
0b246afa | 580 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
581 | struct btrfs_block_rsv *src_rsv; |
582 | struct btrfs_block_rsv *dst_rsv; | |
583 | u64 num_bytes; | |
584 | int ret; | |
8c2a3ca2 | 585 | bool release = false; |
16cdcec7 | 586 | |
16cdcec7 | 587 | src_rsv = trans->block_rsv; |
0b246afa | 588 | dst_rsv = &fs_info->delayed_block_rsv; |
16cdcec7 | 589 | |
0b246afa | 590 | num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1); |
c06a0e12 | 591 | |
c48f49d6 JB |
592 | /* |
593 | * If our block_rsv is the delalloc block reserve then check and see if | |
594 | * we have our extra reservation for updating the inode. If not fall | |
595 | * through and try to reserve space quickly. | |
596 | * | |
597 | * We used to try and steal from the delalloc block rsv or the global | |
598 | * reserve, but we'd steal a full reservation, which isn't kind. We are | |
599 | * here through delalloc which means we've likely just cowed down close | |
600 | * to the leaf that contains the inode, so we would steal less just | |
601 | * doing the fallback inode update, so if we do end up having to steal | |
602 | * from the global block rsv we hopefully only steal one or two blocks | |
603 | * worth which is less likely to hurt us. | |
604 | */ | |
605 | if (src_rsv && src_rsv->type == BTRFS_BLOCK_RSV_DELALLOC) { | |
606 | spin_lock(&BTRFS_I(inode)->lock); | |
607 | if (test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED, | |
608 | &BTRFS_I(inode)->runtime_flags)) | |
609 | release = true; | |
610 | else | |
611 | src_rsv = NULL; | |
612 | spin_unlock(&BTRFS_I(inode)->lock); | |
613 | } | |
614 | ||
c06a0e12 JB |
615 | /* |
616 | * btrfs_dirty_inode will update the inode under btrfs_join_transaction | |
617 | * which doesn't reserve space for speed. This is a problem since we | |
618 | * still need to reserve space for this update, so try to reserve the | |
619 | * space. | |
620 | * | |
621 | * Now if src_rsv == delalloc_block_rsv we'll let it just steal since | |
622 | * we're accounted for. | |
623 | */ | |
e755d9ab | 624 | if (!src_rsv || (!trans->bytes_reserved && |
66d8f3dd | 625 | src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) { |
08e007d2 MX |
626 | ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes, |
627 | BTRFS_RESERVE_NO_FLUSH); | |
c06a0e12 JB |
628 | /* |
629 | * Since we're under a transaction reserve_metadata_bytes could | |
630 | * try to commit the transaction which will make it return | |
631 | * EAGAIN to make us stop the transaction we have, so return | |
632 | * ENOSPC instead so that btrfs_dirty_inode knows what to do. | |
633 | */ | |
634 | if (ret == -EAGAIN) | |
635 | ret = -ENOSPC; | |
8c2a3ca2 | 636 | if (!ret) { |
c06a0e12 | 637 | node->bytes_reserved = num_bytes; |
0b246afa | 638 | trace_btrfs_space_reservation(fs_info, |
8c2a3ca2 JB |
639 | "delayed_inode", |
640 | btrfs_ino(inode), | |
641 | num_bytes, 1); | |
642 | } | |
c06a0e12 JB |
643 | return ret; |
644 | } | |
645 | ||
25d609f8 | 646 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, 1); |
7fd2ae21 | 647 | |
7fd2ae21 JB |
648 | /* |
649 | * Migrate only takes a reservation, it doesn't touch the size of the | |
650 | * block_rsv. This is to simplify people who don't normally have things | |
651 | * migrated from their block rsv. If they go to release their | |
652 | * reservation, that will decrease the size as well, so if migrate | |
653 | * reduced size we'd end up with a negative size. But for the | |
654 | * delalloc_meta_reserved stuff we will only know to drop 1 reservation, | |
655 | * but we could in fact do this reserve/migrate dance several times | |
656 | * between the time we did the original reservation and we'd clean it | |
657 | * up. So to take care of this, release the space for the meta | |
658 | * reservation here. I think it may be time for a documentation page on | |
659 | * how block rsvs. work. | |
660 | */ | |
8c2a3ca2 | 661 | if (!ret) { |
0b246afa | 662 | trace_btrfs_space_reservation(fs_info, "delayed_inode", |
8c2a3ca2 | 663 | btrfs_ino(inode), num_bytes, 1); |
16cdcec7 | 664 | node->bytes_reserved = num_bytes; |
8c2a3ca2 | 665 | } |
16cdcec7 | 666 | |
8c2a3ca2 | 667 | if (release) { |
0b246afa | 668 | trace_btrfs_space_reservation(fs_info, "delalloc", |
8c2a3ca2 | 669 | btrfs_ino(inode), num_bytes, 0); |
2ff7e61e | 670 | btrfs_block_rsv_release(fs_info, src_rsv, num_bytes); |
8c2a3ca2 | 671 | } |
16cdcec7 MX |
672 | |
673 | return ret; | |
674 | } | |
675 | ||
2ff7e61e | 676 | static void btrfs_delayed_inode_release_metadata(struct btrfs_fs_info *fs_info, |
16cdcec7 MX |
677 | struct btrfs_delayed_node *node) |
678 | { | |
679 | struct btrfs_block_rsv *rsv; | |
680 | ||
681 | if (!node->bytes_reserved) | |
682 | return; | |
683 | ||
0b246afa JM |
684 | rsv = &fs_info->delayed_block_rsv; |
685 | trace_btrfs_space_reservation(fs_info, "delayed_inode", | |
8c2a3ca2 | 686 | node->inode_id, node->bytes_reserved, 0); |
2ff7e61e | 687 | btrfs_block_rsv_release(fs_info, rsv, |
16cdcec7 MX |
688 | node->bytes_reserved); |
689 | node->bytes_reserved = 0; | |
690 | } | |
691 | ||
692 | /* | |
693 | * This helper will insert some continuous items into the same leaf according | |
694 | * to the free space of the leaf. | |
695 | */ | |
afe5fea7 TI |
696 | static int btrfs_batch_insert_items(struct btrfs_root *root, |
697 | struct btrfs_path *path, | |
698 | struct btrfs_delayed_item *item) | |
16cdcec7 | 699 | { |
2ff7e61e | 700 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
701 | struct btrfs_delayed_item *curr, *next; |
702 | int free_space; | |
703 | int total_data_size = 0, total_size = 0; | |
704 | struct extent_buffer *leaf; | |
705 | char *data_ptr; | |
706 | struct btrfs_key *keys; | |
707 | u32 *data_size; | |
708 | struct list_head head; | |
709 | int slot; | |
710 | int nitems; | |
711 | int i; | |
712 | int ret = 0; | |
713 | ||
714 | BUG_ON(!path->nodes[0]); | |
715 | ||
716 | leaf = path->nodes[0]; | |
2ff7e61e | 717 | free_space = btrfs_leaf_free_space(fs_info, leaf); |
16cdcec7 MX |
718 | INIT_LIST_HEAD(&head); |
719 | ||
720 | next = item; | |
17aca1c9 | 721 | nitems = 0; |
16cdcec7 MX |
722 | |
723 | /* | |
724 | * count the number of the continuous items that we can insert in batch | |
725 | */ | |
726 | while (total_size + next->data_len + sizeof(struct btrfs_item) <= | |
727 | free_space) { | |
728 | total_data_size += next->data_len; | |
729 | total_size += next->data_len + sizeof(struct btrfs_item); | |
730 | list_add_tail(&next->tree_list, &head); | |
731 | nitems++; | |
732 | ||
733 | curr = next; | |
734 | next = __btrfs_next_delayed_item(curr); | |
735 | if (!next) | |
736 | break; | |
737 | ||
738 | if (!btrfs_is_continuous_delayed_item(curr, next)) | |
739 | break; | |
740 | } | |
741 | ||
742 | if (!nitems) { | |
743 | ret = 0; | |
744 | goto out; | |
745 | } | |
746 | ||
747 | /* | |
748 | * we need allocate some memory space, but it might cause the task | |
749 | * to sleep, so we set all locked nodes in the path to blocking locks | |
750 | * first. | |
751 | */ | |
752 | btrfs_set_path_blocking(path); | |
753 | ||
d9b0d9ba | 754 | keys = kmalloc_array(nitems, sizeof(struct btrfs_key), GFP_NOFS); |
16cdcec7 MX |
755 | if (!keys) { |
756 | ret = -ENOMEM; | |
757 | goto out; | |
758 | } | |
759 | ||
d9b0d9ba | 760 | data_size = kmalloc_array(nitems, sizeof(u32), GFP_NOFS); |
16cdcec7 MX |
761 | if (!data_size) { |
762 | ret = -ENOMEM; | |
763 | goto error; | |
764 | } | |
765 | ||
766 | /* get keys of all the delayed items */ | |
767 | i = 0; | |
768 | list_for_each_entry(next, &head, tree_list) { | |
769 | keys[i] = next->key; | |
770 | data_size[i] = next->data_len; | |
771 | i++; | |
772 | } | |
773 | ||
774 | /* reset all the locked nodes in the patch to spinning locks. */ | |
bd681513 | 775 | btrfs_clear_path_blocking(path, NULL, 0); |
16cdcec7 MX |
776 | |
777 | /* insert the keys of the items */ | |
afe5fea7 | 778 | setup_items_for_insert(root, path, keys, data_size, |
143bede5 | 779 | total_data_size, total_size, nitems); |
16cdcec7 MX |
780 | |
781 | /* insert the dir index items */ | |
782 | slot = path->slots[0]; | |
783 | list_for_each_entry_safe(curr, next, &head, tree_list) { | |
784 | data_ptr = btrfs_item_ptr(leaf, slot, char); | |
785 | write_extent_buffer(leaf, &curr->data, | |
786 | (unsigned long)data_ptr, | |
787 | curr->data_len); | |
788 | slot++; | |
789 | ||
2ff7e61e | 790 | btrfs_delayed_item_release_metadata(fs_info, curr); |
16cdcec7 MX |
791 | |
792 | list_del(&curr->tree_list); | |
793 | btrfs_release_delayed_item(curr); | |
794 | } | |
795 | ||
796 | error: | |
797 | kfree(data_size); | |
798 | kfree(keys); | |
799 | out: | |
800 | return ret; | |
801 | } | |
802 | ||
803 | /* | |
804 | * This helper can just do simple insertion that needn't extend item for new | |
805 | * data, such as directory name index insertion, inode insertion. | |
806 | */ | |
807 | static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, | |
808 | struct btrfs_root *root, | |
809 | struct btrfs_path *path, | |
810 | struct btrfs_delayed_item *delayed_item) | |
811 | { | |
2ff7e61e | 812 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 | 813 | struct extent_buffer *leaf; |
16cdcec7 MX |
814 | char *ptr; |
815 | int ret; | |
816 | ||
817 | ret = btrfs_insert_empty_item(trans, root, path, &delayed_item->key, | |
818 | delayed_item->data_len); | |
819 | if (ret < 0 && ret != -EEXIST) | |
820 | return ret; | |
821 | ||
822 | leaf = path->nodes[0]; | |
823 | ||
16cdcec7 MX |
824 | ptr = btrfs_item_ptr(leaf, path->slots[0], char); |
825 | ||
826 | write_extent_buffer(leaf, delayed_item->data, (unsigned long)ptr, | |
827 | delayed_item->data_len); | |
828 | btrfs_mark_buffer_dirty(leaf); | |
829 | ||
2ff7e61e | 830 | btrfs_delayed_item_release_metadata(fs_info, delayed_item); |
16cdcec7 MX |
831 | return 0; |
832 | } | |
833 | ||
834 | /* | |
835 | * we insert an item first, then if there are some continuous items, we try | |
836 | * to insert those items into the same leaf. | |
837 | */ | |
838 | static int btrfs_insert_delayed_items(struct btrfs_trans_handle *trans, | |
839 | struct btrfs_path *path, | |
840 | struct btrfs_root *root, | |
841 | struct btrfs_delayed_node *node) | |
842 | { | |
843 | struct btrfs_delayed_item *curr, *prev; | |
844 | int ret = 0; | |
845 | ||
846 | do_again: | |
847 | mutex_lock(&node->mutex); | |
848 | curr = __btrfs_first_delayed_insertion_item(node); | |
849 | if (!curr) | |
850 | goto insert_end; | |
851 | ||
852 | ret = btrfs_insert_delayed_item(trans, root, path, curr); | |
853 | if (ret < 0) { | |
945d8962 | 854 | btrfs_release_path(path); |
16cdcec7 MX |
855 | goto insert_end; |
856 | } | |
857 | ||
858 | prev = curr; | |
859 | curr = __btrfs_next_delayed_item(prev); | |
860 | if (curr && btrfs_is_continuous_delayed_item(prev, curr)) { | |
861 | /* insert the continuous items into the same leaf */ | |
862 | path->slots[0]++; | |
afe5fea7 | 863 | btrfs_batch_insert_items(root, path, curr); |
16cdcec7 MX |
864 | } |
865 | btrfs_release_delayed_item(prev); | |
866 | btrfs_mark_buffer_dirty(path->nodes[0]); | |
867 | ||
945d8962 | 868 | btrfs_release_path(path); |
16cdcec7 MX |
869 | mutex_unlock(&node->mutex); |
870 | goto do_again; | |
871 | ||
872 | insert_end: | |
873 | mutex_unlock(&node->mutex); | |
874 | return ret; | |
875 | } | |
876 | ||
877 | static int btrfs_batch_delete_items(struct btrfs_trans_handle *trans, | |
878 | struct btrfs_root *root, | |
879 | struct btrfs_path *path, | |
880 | struct btrfs_delayed_item *item) | |
881 | { | |
2ff7e61e | 882 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
883 | struct btrfs_delayed_item *curr, *next; |
884 | struct extent_buffer *leaf; | |
885 | struct btrfs_key key; | |
886 | struct list_head head; | |
887 | int nitems, i, last_item; | |
888 | int ret = 0; | |
889 | ||
890 | BUG_ON(!path->nodes[0]); | |
891 | ||
892 | leaf = path->nodes[0]; | |
893 | ||
894 | i = path->slots[0]; | |
895 | last_item = btrfs_header_nritems(leaf) - 1; | |
896 | if (i > last_item) | |
897 | return -ENOENT; /* FIXME: Is errno suitable? */ | |
898 | ||
899 | next = item; | |
900 | INIT_LIST_HEAD(&head); | |
901 | btrfs_item_key_to_cpu(leaf, &key, i); | |
902 | nitems = 0; | |
903 | /* | |
904 | * count the number of the dir index items that we can delete in batch | |
905 | */ | |
906 | while (btrfs_comp_cpu_keys(&next->key, &key) == 0) { | |
907 | list_add_tail(&next->tree_list, &head); | |
908 | nitems++; | |
909 | ||
910 | curr = next; | |
911 | next = __btrfs_next_delayed_item(curr); | |
912 | if (!next) | |
913 | break; | |
914 | ||
915 | if (!btrfs_is_continuous_delayed_item(curr, next)) | |
916 | break; | |
917 | ||
918 | i++; | |
919 | if (i > last_item) | |
920 | break; | |
921 | btrfs_item_key_to_cpu(leaf, &key, i); | |
922 | } | |
923 | ||
924 | if (!nitems) | |
925 | return 0; | |
926 | ||
927 | ret = btrfs_del_items(trans, root, path, path->slots[0], nitems); | |
928 | if (ret) | |
929 | goto out; | |
930 | ||
931 | list_for_each_entry_safe(curr, next, &head, tree_list) { | |
2ff7e61e | 932 | btrfs_delayed_item_release_metadata(fs_info, curr); |
16cdcec7 MX |
933 | list_del(&curr->tree_list); |
934 | btrfs_release_delayed_item(curr); | |
935 | } | |
936 | ||
937 | out: | |
938 | return ret; | |
939 | } | |
940 | ||
941 | static int btrfs_delete_delayed_items(struct btrfs_trans_handle *trans, | |
942 | struct btrfs_path *path, | |
943 | struct btrfs_root *root, | |
944 | struct btrfs_delayed_node *node) | |
945 | { | |
946 | struct btrfs_delayed_item *curr, *prev; | |
947 | int ret = 0; | |
948 | ||
949 | do_again: | |
950 | mutex_lock(&node->mutex); | |
951 | curr = __btrfs_first_delayed_deletion_item(node); | |
952 | if (!curr) | |
953 | goto delete_fail; | |
954 | ||
955 | ret = btrfs_search_slot(trans, root, &curr->key, path, -1, 1); | |
956 | if (ret < 0) | |
957 | goto delete_fail; | |
958 | else if (ret > 0) { | |
959 | /* | |
960 | * can't find the item which the node points to, so this node | |
961 | * is invalid, just drop it. | |
962 | */ | |
963 | prev = curr; | |
964 | curr = __btrfs_next_delayed_item(prev); | |
965 | btrfs_release_delayed_item(prev); | |
966 | ret = 0; | |
945d8962 | 967 | btrfs_release_path(path); |
62095265 FW |
968 | if (curr) { |
969 | mutex_unlock(&node->mutex); | |
16cdcec7 | 970 | goto do_again; |
62095265 | 971 | } else |
16cdcec7 MX |
972 | goto delete_fail; |
973 | } | |
974 | ||
975 | btrfs_batch_delete_items(trans, root, path, curr); | |
945d8962 | 976 | btrfs_release_path(path); |
16cdcec7 MX |
977 | mutex_unlock(&node->mutex); |
978 | goto do_again; | |
979 | ||
980 | delete_fail: | |
945d8962 | 981 | btrfs_release_path(path); |
16cdcec7 MX |
982 | mutex_unlock(&node->mutex); |
983 | return ret; | |
984 | } | |
985 | ||
986 | static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) | |
987 | { | |
988 | struct btrfs_delayed_root *delayed_root; | |
989 | ||
7cf35d91 MX |
990 | if (delayed_node && |
991 | test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { | |
16cdcec7 | 992 | BUG_ON(!delayed_node->root); |
7cf35d91 | 993 | clear_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); |
16cdcec7 MX |
994 | delayed_node->count--; |
995 | ||
996 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
de3cb945 | 997 | finish_one_item(delayed_root); |
16cdcec7 MX |
998 | } |
999 | } | |
1000 | ||
67de1176 MX |
1001 | static void btrfs_release_delayed_iref(struct btrfs_delayed_node *delayed_node) |
1002 | { | |
1003 | struct btrfs_delayed_root *delayed_root; | |
1004 | ||
1005 | ASSERT(delayed_node->root); | |
1006 | clear_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); | |
1007 | delayed_node->count--; | |
1008 | ||
1009 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
1010 | finish_one_item(delayed_root); | |
1011 | } | |
1012 | ||
0e8c36a9 MX |
1013 | static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, |
1014 | struct btrfs_root *root, | |
1015 | struct btrfs_path *path, | |
1016 | struct btrfs_delayed_node *node) | |
16cdcec7 | 1017 | { |
2ff7e61e | 1018 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
1019 | struct btrfs_key key; |
1020 | struct btrfs_inode_item *inode_item; | |
1021 | struct extent_buffer *leaf; | |
67de1176 | 1022 | int mod; |
16cdcec7 MX |
1023 | int ret; |
1024 | ||
16cdcec7 | 1025 | key.objectid = node->inode_id; |
962a298f | 1026 | key.type = BTRFS_INODE_ITEM_KEY; |
16cdcec7 | 1027 | key.offset = 0; |
0e8c36a9 | 1028 | |
67de1176 MX |
1029 | if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) |
1030 | mod = -1; | |
1031 | else | |
1032 | mod = 1; | |
1033 | ||
1034 | ret = btrfs_lookup_inode(trans, root, path, &key, mod); | |
16cdcec7 | 1035 | if (ret > 0) { |
945d8962 | 1036 | btrfs_release_path(path); |
16cdcec7 MX |
1037 | return -ENOENT; |
1038 | } else if (ret < 0) { | |
16cdcec7 MX |
1039 | return ret; |
1040 | } | |
1041 | ||
16cdcec7 MX |
1042 | leaf = path->nodes[0]; |
1043 | inode_item = btrfs_item_ptr(leaf, path->slots[0], | |
1044 | struct btrfs_inode_item); | |
1045 | write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item, | |
1046 | sizeof(struct btrfs_inode_item)); | |
1047 | btrfs_mark_buffer_dirty(leaf); | |
16cdcec7 | 1048 | |
67de1176 MX |
1049 | if (!test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) |
1050 | goto no_iref; | |
1051 | ||
1052 | path->slots[0]++; | |
1053 | if (path->slots[0] >= btrfs_header_nritems(leaf)) | |
1054 | goto search; | |
1055 | again: | |
1056 | btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); | |
1057 | if (key.objectid != node->inode_id) | |
1058 | goto out; | |
1059 | ||
1060 | if (key.type != BTRFS_INODE_REF_KEY && | |
1061 | key.type != BTRFS_INODE_EXTREF_KEY) | |
1062 | goto out; | |
1063 | ||
1064 | /* | |
1065 | * Delayed iref deletion is for the inode who has only one link, | |
1066 | * so there is only one iref. The case that several irefs are | |
1067 | * in the same item doesn't exist. | |
1068 | */ | |
1069 | btrfs_del_item(trans, root, path); | |
1070 | out: | |
1071 | btrfs_release_delayed_iref(node); | |
1072 | no_iref: | |
1073 | btrfs_release_path(path); | |
1074 | err_out: | |
2ff7e61e | 1075 | btrfs_delayed_inode_release_metadata(fs_info, node); |
16cdcec7 | 1076 | btrfs_release_delayed_inode(node); |
16cdcec7 | 1077 | |
67de1176 MX |
1078 | return ret; |
1079 | ||
1080 | search: | |
1081 | btrfs_release_path(path); | |
1082 | ||
962a298f | 1083 | key.type = BTRFS_INODE_EXTREF_KEY; |
67de1176 MX |
1084 | key.offset = -1; |
1085 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); | |
1086 | if (ret < 0) | |
1087 | goto err_out; | |
1088 | ASSERT(ret); | |
1089 | ||
1090 | ret = 0; | |
1091 | leaf = path->nodes[0]; | |
1092 | path->slots[0]--; | |
1093 | goto again; | |
16cdcec7 MX |
1094 | } |
1095 | ||
0e8c36a9 MX |
1096 | static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, |
1097 | struct btrfs_root *root, | |
1098 | struct btrfs_path *path, | |
1099 | struct btrfs_delayed_node *node) | |
1100 | { | |
1101 | int ret; | |
1102 | ||
1103 | mutex_lock(&node->mutex); | |
7cf35d91 | 1104 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &node->flags)) { |
0e8c36a9 MX |
1105 | mutex_unlock(&node->mutex); |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | ret = __btrfs_update_delayed_inode(trans, root, path, node); | |
1110 | mutex_unlock(&node->mutex); | |
1111 | return ret; | |
1112 | } | |
1113 | ||
4ea41ce0 MX |
1114 | static inline int |
1115 | __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, | |
1116 | struct btrfs_path *path, | |
1117 | struct btrfs_delayed_node *node) | |
1118 | { | |
1119 | int ret; | |
1120 | ||
1121 | ret = btrfs_insert_delayed_items(trans, path, node->root, node); | |
1122 | if (ret) | |
1123 | return ret; | |
1124 | ||
1125 | ret = btrfs_delete_delayed_items(trans, path, node->root, node); | |
1126 | if (ret) | |
1127 | return ret; | |
1128 | ||
1129 | ret = btrfs_update_delayed_inode(trans, node->root, path, node); | |
1130 | return ret; | |
1131 | } | |
1132 | ||
79787eaa JM |
1133 | /* |
1134 | * Called when committing the transaction. | |
1135 | * Returns 0 on success. | |
1136 | * Returns < 0 on error and returns with an aborted transaction with any | |
1137 | * outstanding delayed items cleaned up. | |
1138 | */ | |
96c3f433 | 1139 | static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans, |
2ff7e61e | 1140 | struct btrfs_fs_info *fs_info, int nr) |
16cdcec7 MX |
1141 | { |
1142 | struct btrfs_delayed_root *delayed_root; | |
1143 | struct btrfs_delayed_node *curr_node, *prev_node; | |
1144 | struct btrfs_path *path; | |
19fd2949 | 1145 | struct btrfs_block_rsv *block_rsv; |
16cdcec7 | 1146 | int ret = 0; |
96c3f433 | 1147 | bool count = (nr > 0); |
16cdcec7 | 1148 | |
79787eaa JM |
1149 | if (trans->aborted) |
1150 | return -EIO; | |
1151 | ||
16cdcec7 MX |
1152 | path = btrfs_alloc_path(); |
1153 | if (!path) | |
1154 | return -ENOMEM; | |
1155 | path->leave_spinning = 1; | |
1156 | ||
19fd2949 | 1157 | block_rsv = trans->block_rsv; |
0b246afa | 1158 | trans->block_rsv = &fs_info->delayed_block_rsv; |
19fd2949 | 1159 | |
ccdf9b30 | 1160 | delayed_root = fs_info->delayed_root; |
16cdcec7 MX |
1161 | |
1162 | curr_node = btrfs_first_delayed_node(delayed_root); | |
96c3f433 | 1163 | while (curr_node && (!count || (count && nr--))) { |
4ea41ce0 MX |
1164 | ret = __btrfs_commit_inode_delayed_items(trans, path, |
1165 | curr_node); | |
16cdcec7 MX |
1166 | if (ret) { |
1167 | btrfs_release_delayed_node(curr_node); | |
96c3f433 | 1168 | curr_node = NULL; |
66642832 | 1169 | btrfs_abort_transaction(trans, ret); |
16cdcec7 MX |
1170 | break; |
1171 | } | |
1172 | ||
1173 | prev_node = curr_node; | |
1174 | curr_node = btrfs_next_delayed_node(curr_node); | |
1175 | btrfs_release_delayed_node(prev_node); | |
1176 | } | |
1177 | ||
96c3f433 JB |
1178 | if (curr_node) |
1179 | btrfs_release_delayed_node(curr_node); | |
16cdcec7 | 1180 | btrfs_free_path(path); |
19fd2949 | 1181 | trans->block_rsv = block_rsv; |
79787eaa | 1182 | |
16cdcec7 MX |
1183 | return ret; |
1184 | } | |
1185 | ||
96c3f433 | 1186 | int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, |
2ff7e61e | 1187 | struct btrfs_fs_info *fs_info) |
96c3f433 | 1188 | { |
2ff7e61e | 1189 | return __btrfs_run_delayed_items(trans, fs_info, -1); |
96c3f433 JB |
1190 | } |
1191 | ||
1192 | int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, | |
2ff7e61e | 1193 | struct btrfs_fs_info *fs_info, int nr) |
96c3f433 | 1194 | { |
2ff7e61e | 1195 | return __btrfs_run_delayed_items(trans, fs_info, nr); |
96c3f433 JB |
1196 | } |
1197 | ||
16cdcec7 MX |
1198 | int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, |
1199 | struct inode *inode) | |
1200 | { | |
1201 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); | |
4ea41ce0 MX |
1202 | struct btrfs_path *path; |
1203 | struct btrfs_block_rsv *block_rsv; | |
16cdcec7 MX |
1204 | int ret; |
1205 | ||
1206 | if (!delayed_node) | |
1207 | return 0; | |
1208 | ||
1209 | mutex_lock(&delayed_node->mutex); | |
1210 | if (!delayed_node->count) { | |
1211 | mutex_unlock(&delayed_node->mutex); | |
1212 | btrfs_release_delayed_node(delayed_node); | |
1213 | return 0; | |
1214 | } | |
1215 | mutex_unlock(&delayed_node->mutex); | |
1216 | ||
4ea41ce0 | 1217 | path = btrfs_alloc_path(); |
3c77bd94 FDBM |
1218 | if (!path) { |
1219 | btrfs_release_delayed_node(delayed_node); | |
4ea41ce0 | 1220 | return -ENOMEM; |
3c77bd94 | 1221 | } |
4ea41ce0 MX |
1222 | path->leave_spinning = 1; |
1223 | ||
1224 | block_rsv = trans->block_rsv; | |
1225 | trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; | |
1226 | ||
1227 | ret = __btrfs_commit_inode_delayed_items(trans, path, delayed_node); | |
1228 | ||
16cdcec7 | 1229 | btrfs_release_delayed_node(delayed_node); |
4ea41ce0 MX |
1230 | btrfs_free_path(path); |
1231 | trans->block_rsv = block_rsv; | |
1232 | ||
16cdcec7 MX |
1233 | return ret; |
1234 | } | |
1235 | ||
0e8c36a9 MX |
1236 | int btrfs_commit_inode_delayed_inode(struct inode *inode) |
1237 | { | |
2ff7e61e | 1238 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
0e8c36a9 MX |
1239 | struct btrfs_trans_handle *trans; |
1240 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); | |
1241 | struct btrfs_path *path; | |
1242 | struct btrfs_block_rsv *block_rsv; | |
1243 | int ret; | |
1244 | ||
1245 | if (!delayed_node) | |
1246 | return 0; | |
1247 | ||
1248 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1249 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
0e8c36a9 MX |
1250 | mutex_unlock(&delayed_node->mutex); |
1251 | btrfs_release_delayed_node(delayed_node); | |
1252 | return 0; | |
1253 | } | |
1254 | mutex_unlock(&delayed_node->mutex); | |
1255 | ||
1256 | trans = btrfs_join_transaction(delayed_node->root); | |
1257 | if (IS_ERR(trans)) { | |
1258 | ret = PTR_ERR(trans); | |
1259 | goto out; | |
1260 | } | |
1261 | ||
1262 | path = btrfs_alloc_path(); | |
1263 | if (!path) { | |
1264 | ret = -ENOMEM; | |
1265 | goto trans_out; | |
1266 | } | |
1267 | path->leave_spinning = 1; | |
1268 | ||
1269 | block_rsv = trans->block_rsv; | |
2ff7e61e | 1270 | trans->block_rsv = &fs_info->delayed_block_rsv; |
0e8c36a9 MX |
1271 | |
1272 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1273 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) |
0e8c36a9 MX |
1274 | ret = __btrfs_update_delayed_inode(trans, delayed_node->root, |
1275 | path, delayed_node); | |
1276 | else | |
1277 | ret = 0; | |
1278 | mutex_unlock(&delayed_node->mutex); | |
1279 | ||
1280 | btrfs_free_path(path); | |
1281 | trans->block_rsv = block_rsv; | |
1282 | trans_out: | |
3a45bb20 | 1283 | btrfs_end_transaction(trans); |
2ff7e61e | 1284 | btrfs_btree_balance_dirty(fs_info); |
0e8c36a9 MX |
1285 | out: |
1286 | btrfs_release_delayed_node(delayed_node); | |
1287 | ||
1288 | return ret; | |
1289 | } | |
1290 | ||
16cdcec7 MX |
1291 | void btrfs_remove_delayed_node(struct inode *inode) |
1292 | { | |
1293 | struct btrfs_delayed_node *delayed_node; | |
1294 | ||
1295 | delayed_node = ACCESS_ONCE(BTRFS_I(inode)->delayed_node); | |
1296 | if (!delayed_node) | |
1297 | return; | |
1298 | ||
1299 | BTRFS_I(inode)->delayed_node = NULL; | |
1300 | btrfs_release_delayed_node(delayed_node); | |
1301 | } | |
1302 | ||
de3cb945 CM |
1303 | struct btrfs_async_delayed_work { |
1304 | struct btrfs_delayed_root *delayed_root; | |
1305 | int nr; | |
d458b054 | 1306 | struct btrfs_work work; |
16cdcec7 MX |
1307 | }; |
1308 | ||
d458b054 | 1309 | static void btrfs_async_run_delayed_root(struct btrfs_work *work) |
16cdcec7 | 1310 | { |
de3cb945 CM |
1311 | struct btrfs_async_delayed_work *async_work; |
1312 | struct btrfs_delayed_root *delayed_root; | |
16cdcec7 MX |
1313 | struct btrfs_trans_handle *trans; |
1314 | struct btrfs_path *path; | |
1315 | struct btrfs_delayed_node *delayed_node = NULL; | |
1316 | struct btrfs_root *root; | |
19fd2949 | 1317 | struct btrfs_block_rsv *block_rsv; |
de3cb945 | 1318 | int total_done = 0; |
16cdcec7 | 1319 | |
de3cb945 CM |
1320 | async_work = container_of(work, struct btrfs_async_delayed_work, work); |
1321 | delayed_root = async_work->delayed_root; | |
16cdcec7 MX |
1322 | |
1323 | path = btrfs_alloc_path(); | |
1324 | if (!path) | |
1325 | goto out; | |
16cdcec7 | 1326 | |
de3cb945 CM |
1327 | again: |
1328 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND / 2) | |
1329 | goto free_path; | |
1330 | ||
1331 | delayed_node = btrfs_first_prepared_delayed_node(delayed_root); | |
1332 | if (!delayed_node) | |
1333 | goto free_path; | |
1334 | ||
1335 | path->leave_spinning = 1; | |
16cdcec7 MX |
1336 | root = delayed_node->root; |
1337 | ||
ff5714cc | 1338 | trans = btrfs_join_transaction(root); |
16cdcec7 | 1339 | if (IS_ERR(trans)) |
de3cb945 | 1340 | goto release_path; |
16cdcec7 | 1341 | |
19fd2949 | 1342 | block_rsv = trans->block_rsv; |
6d668dda | 1343 | trans->block_rsv = &root->fs_info->delayed_block_rsv; |
19fd2949 | 1344 | |
4ea41ce0 | 1345 | __btrfs_commit_inode_delayed_items(trans, path, delayed_node); |
16cdcec7 | 1346 | |
19fd2949 | 1347 | trans->block_rsv = block_rsv; |
3a45bb20 | 1348 | btrfs_end_transaction(trans); |
2ff7e61e | 1349 | btrfs_btree_balance_dirty_nodelay(root->fs_info); |
de3cb945 CM |
1350 | |
1351 | release_path: | |
1352 | btrfs_release_path(path); | |
1353 | total_done++; | |
1354 | ||
1355 | btrfs_release_prepared_delayed_node(delayed_node); | |
2939e1a8 MP |
1356 | if ((async_work->nr == 0 && total_done < BTRFS_DELAYED_WRITEBACK) || |
1357 | total_done < async_work->nr) | |
de3cb945 CM |
1358 | goto again; |
1359 | ||
16cdcec7 MX |
1360 | free_path: |
1361 | btrfs_free_path(path); | |
1362 | out: | |
de3cb945 CM |
1363 | wake_up(&delayed_root->wait); |
1364 | kfree(async_work); | |
16cdcec7 MX |
1365 | } |
1366 | ||
de3cb945 | 1367 | |
16cdcec7 | 1368 | static int btrfs_wq_run_delayed_node(struct btrfs_delayed_root *delayed_root, |
a585e948 | 1369 | struct btrfs_fs_info *fs_info, int nr) |
16cdcec7 | 1370 | { |
de3cb945 | 1371 | struct btrfs_async_delayed_work *async_work; |
16cdcec7 | 1372 | |
2939e1a8 MP |
1373 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND || |
1374 | btrfs_workqueue_normal_congested(fs_info->delayed_workers)) | |
16cdcec7 MX |
1375 | return 0; |
1376 | ||
de3cb945 CM |
1377 | async_work = kmalloc(sizeof(*async_work), GFP_NOFS); |
1378 | if (!async_work) | |
16cdcec7 | 1379 | return -ENOMEM; |
16cdcec7 | 1380 | |
de3cb945 | 1381 | async_work->delayed_root = delayed_root; |
9e0af237 LB |
1382 | btrfs_init_work(&async_work->work, btrfs_delayed_meta_helper, |
1383 | btrfs_async_run_delayed_root, NULL, NULL); | |
de3cb945 | 1384 | async_work->nr = nr; |
16cdcec7 | 1385 | |
a585e948 | 1386 | btrfs_queue_work(fs_info->delayed_workers, &async_work->work); |
16cdcec7 MX |
1387 | return 0; |
1388 | } | |
1389 | ||
ccdf9b30 | 1390 | void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info) |
e999376f | 1391 | { |
ccdf9b30 | 1392 | WARN_ON(btrfs_first_delayed_node(fs_info->delayed_root)); |
e999376f CM |
1393 | } |
1394 | ||
0353808c | 1395 | static int could_end_wait(struct btrfs_delayed_root *delayed_root, int seq) |
de3cb945 CM |
1396 | { |
1397 | int val = atomic_read(&delayed_root->items_seq); | |
1398 | ||
0353808c | 1399 | if (val < seq || val >= seq + BTRFS_DELAYED_BATCH) |
de3cb945 | 1400 | return 1; |
0353808c MX |
1401 | |
1402 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) | |
1403 | return 1; | |
1404 | ||
de3cb945 CM |
1405 | return 0; |
1406 | } | |
1407 | ||
2ff7e61e | 1408 | void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info) |
16cdcec7 | 1409 | { |
2ff7e61e | 1410 | struct btrfs_delayed_root *delayed_root = fs_info->delayed_root; |
16cdcec7 MX |
1411 | |
1412 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) | |
1413 | return; | |
1414 | ||
1415 | if (atomic_read(&delayed_root->items) >= BTRFS_DELAYED_WRITEBACK) { | |
0353808c | 1416 | int seq; |
16cdcec7 | 1417 | int ret; |
0353808c MX |
1418 | |
1419 | seq = atomic_read(&delayed_root->items_seq); | |
de3cb945 | 1420 | |
a585e948 | 1421 | ret = btrfs_wq_run_delayed_node(delayed_root, fs_info, 0); |
16cdcec7 MX |
1422 | if (ret) |
1423 | return; | |
1424 | ||
0353808c MX |
1425 | wait_event_interruptible(delayed_root->wait, |
1426 | could_end_wait(delayed_root, seq)); | |
4dd466d3 | 1427 | return; |
16cdcec7 MX |
1428 | } |
1429 | ||
a585e948 | 1430 | btrfs_wq_run_delayed_node(delayed_root, fs_info, BTRFS_DELAYED_BATCH); |
16cdcec7 MX |
1431 | } |
1432 | ||
79787eaa | 1433 | /* Will return 0 or -ENOMEM */ |
16cdcec7 | 1434 | int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, |
2ff7e61e JM |
1435 | struct btrfs_fs_info *fs_info, |
1436 | const char *name, int name_len, | |
1437 | struct inode *dir, | |
16cdcec7 MX |
1438 | struct btrfs_disk_key *disk_key, u8 type, |
1439 | u64 index) | |
1440 | { | |
1441 | struct btrfs_delayed_node *delayed_node; | |
1442 | struct btrfs_delayed_item *delayed_item; | |
1443 | struct btrfs_dir_item *dir_item; | |
1444 | int ret; | |
1445 | ||
1446 | delayed_node = btrfs_get_or_create_delayed_node(dir); | |
1447 | if (IS_ERR(delayed_node)) | |
1448 | return PTR_ERR(delayed_node); | |
1449 | ||
1450 | delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len); | |
1451 | if (!delayed_item) { | |
1452 | ret = -ENOMEM; | |
1453 | goto release_node; | |
1454 | } | |
1455 | ||
0d0ca30f | 1456 | delayed_item->key.objectid = btrfs_ino(dir); |
962a298f | 1457 | delayed_item->key.type = BTRFS_DIR_INDEX_KEY; |
16cdcec7 MX |
1458 | delayed_item->key.offset = index; |
1459 | ||
1460 | dir_item = (struct btrfs_dir_item *)delayed_item->data; | |
1461 | dir_item->location = *disk_key; | |
3cae210f QW |
1462 | btrfs_set_stack_dir_transid(dir_item, trans->transid); |
1463 | btrfs_set_stack_dir_data_len(dir_item, 0); | |
1464 | btrfs_set_stack_dir_name_len(dir_item, name_len); | |
1465 | btrfs_set_stack_dir_type(dir_item, type); | |
16cdcec7 MX |
1466 | memcpy((char *)(dir_item + 1), name, name_len); |
1467 | ||
2ff7e61e | 1468 | ret = btrfs_delayed_item_reserve_metadata(trans, fs_info, delayed_item); |
8c2a3ca2 JB |
1469 | /* |
1470 | * we have reserved enough space when we start a new transaction, | |
1471 | * so reserving metadata failure is impossible | |
1472 | */ | |
1473 | BUG_ON(ret); | |
1474 | ||
1475 | ||
16cdcec7 MX |
1476 | mutex_lock(&delayed_node->mutex); |
1477 | ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item); | |
1478 | if (unlikely(ret)) { | |
2ff7e61e | 1479 | btrfs_err(fs_info, |
5d163e0e JM |
1480 | "err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", |
1481 | name_len, name, delayed_node->root->objectid, | |
1482 | delayed_node->inode_id, ret); | |
16cdcec7 MX |
1483 | BUG(); |
1484 | } | |
1485 | mutex_unlock(&delayed_node->mutex); | |
1486 | ||
1487 | release_node: | |
1488 | btrfs_release_delayed_node(delayed_node); | |
1489 | return ret; | |
1490 | } | |
1491 | ||
2ff7e61e | 1492 | static int btrfs_delete_delayed_insertion_item(struct btrfs_fs_info *fs_info, |
16cdcec7 MX |
1493 | struct btrfs_delayed_node *node, |
1494 | struct btrfs_key *key) | |
1495 | { | |
1496 | struct btrfs_delayed_item *item; | |
1497 | ||
1498 | mutex_lock(&node->mutex); | |
1499 | item = __btrfs_lookup_delayed_insertion_item(node, key); | |
1500 | if (!item) { | |
1501 | mutex_unlock(&node->mutex); | |
1502 | return 1; | |
1503 | } | |
1504 | ||
2ff7e61e | 1505 | btrfs_delayed_item_release_metadata(fs_info, item); |
16cdcec7 MX |
1506 | btrfs_release_delayed_item(item); |
1507 | mutex_unlock(&node->mutex); | |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, | |
2ff7e61e JM |
1512 | struct btrfs_fs_info *fs_info, |
1513 | struct inode *dir, u64 index) | |
16cdcec7 MX |
1514 | { |
1515 | struct btrfs_delayed_node *node; | |
1516 | struct btrfs_delayed_item *item; | |
1517 | struct btrfs_key item_key; | |
1518 | int ret; | |
1519 | ||
1520 | node = btrfs_get_or_create_delayed_node(dir); | |
1521 | if (IS_ERR(node)) | |
1522 | return PTR_ERR(node); | |
1523 | ||
0d0ca30f | 1524 | item_key.objectid = btrfs_ino(dir); |
962a298f | 1525 | item_key.type = BTRFS_DIR_INDEX_KEY; |
16cdcec7 MX |
1526 | item_key.offset = index; |
1527 | ||
2ff7e61e | 1528 | ret = btrfs_delete_delayed_insertion_item(fs_info, node, &item_key); |
16cdcec7 MX |
1529 | if (!ret) |
1530 | goto end; | |
1531 | ||
1532 | item = btrfs_alloc_delayed_item(0); | |
1533 | if (!item) { | |
1534 | ret = -ENOMEM; | |
1535 | goto end; | |
1536 | } | |
1537 | ||
1538 | item->key = item_key; | |
1539 | ||
2ff7e61e | 1540 | ret = btrfs_delayed_item_reserve_metadata(trans, fs_info, item); |
16cdcec7 MX |
1541 | /* |
1542 | * we have reserved enough space when we start a new transaction, | |
1543 | * so reserving metadata failure is impossible. | |
1544 | */ | |
1545 | BUG_ON(ret); | |
1546 | ||
1547 | mutex_lock(&node->mutex); | |
1548 | ret = __btrfs_add_delayed_deletion_item(node, item); | |
1549 | if (unlikely(ret)) { | |
2ff7e61e | 1550 | btrfs_err(fs_info, |
5d163e0e JM |
1551 | "err add delayed dir index item(index: %llu) into the deletion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", |
1552 | index, node->root->objectid, node->inode_id, ret); | |
16cdcec7 MX |
1553 | BUG(); |
1554 | } | |
1555 | mutex_unlock(&node->mutex); | |
1556 | end: | |
1557 | btrfs_release_delayed_node(node); | |
1558 | return ret; | |
1559 | } | |
1560 | ||
1561 | int btrfs_inode_delayed_dir_index_count(struct inode *inode) | |
1562 | { | |
2f7e33d4 | 1563 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); |
16cdcec7 MX |
1564 | |
1565 | if (!delayed_node) | |
1566 | return -ENOENT; | |
1567 | ||
1568 | /* | |
1569 | * Since we have held i_mutex of this directory, it is impossible that | |
1570 | * a new directory index is added into the delayed node and index_cnt | |
1571 | * is updated now. So we needn't lock the delayed node. | |
1572 | */ | |
2f7e33d4 MX |
1573 | if (!delayed_node->index_cnt) { |
1574 | btrfs_release_delayed_node(delayed_node); | |
16cdcec7 | 1575 | return -EINVAL; |
2f7e33d4 | 1576 | } |
16cdcec7 MX |
1577 | |
1578 | BTRFS_I(inode)->index_cnt = delayed_node->index_cnt; | |
2f7e33d4 MX |
1579 | btrfs_release_delayed_node(delayed_node); |
1580 | return 0; | |
16cdcec7 MX |
1581 | } |
1582 | ||
02dbfc99 OS |
1583 | bool btrfs_readdir_get_delayed_items(struct inode *inode, |
1584 | struct list_head *ins_list, | |
1585 | struct list_head *del_list) | |
16cdcec7 MX |
1586 | { |
1587 | struct btrfs_delayed_node *delayed_node; | |
1588 | struct btrfs_delayed_item *item; | |
1589 | ||
1590 | delayed_node = btrfs_get_delayed_node(inode); | |
1591 | if (!delayed_node) | |
02dbfc99 OS |
1592 | return false; |
1593 | ||
1594 | /* | |
1595 | * We can only do one readdir with delayed items at a time because of | |
1596 | * item->readdir_list. | |
1597 | */ | |
1598 | inode_unlock_shared(inode); | |
1599 | inode_lock(inode); | |
16cdcec7 MX |
1600 | |
1601 | mutex_lock(&delayed_node->mutex); | |
1602 | item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1603 | while (item) { | |
1604 | atomic_inc(&item->refs); | |
1605 | list_add_tail(&item->readdir_list, ins_list); | |
1606 | item = __btrfs_next_delayed_item(item); | |
1607 | } | |
1608 | ||
1609 | item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1610 | while (item) { | |
1611 | atomic_inc(&item->refs); | |
1612 | list_add_tail(&item->readdir_list, del_list); | |
1613 | item = __btrfs_next_delayed_item(item); | |
1614 | } | |
1615 | mutex_unlock(&delayed_node->mutex); | |
1616 | /* | |
1617 | * This delayed node is still cached in the btrfs inode, so refs | |
1618 | * must be > 1 now, and we needn't check it is going to be freed | |
1619 | * or not. | |
1620 | * | |
1621 | * Besides that, this function is used to read dir, we do not | |
1622 | * insert/delete delayed items in this period. So we also needn't | |
1623 | * requeue or dequeue this delayed node. | |
1624 | */ | |
1625 | atomic_dec(&delayed_node->refs); | |
02dbfc99 OS |
1626 | |
1627 | return true; | |
16cdcec7 MX |
1628 | } |
1629 | ||
02dbfc99 OS |
1630 | void btrfs_readdir_put_delayed_items(struct inode *inode, |
1631 | struct list_head *ins_list, | |
1632 | struct list_head *del_list) | |
16cdcec7 MX |
1633 | { |
1634 | struct btrfs_delayed_item *curr, *next; | |
1635 | ||
1636 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1637 | list_del(&curr->readdir_list); | |
1638 | if (atomic_dec_and_test(&curr->refs)) | |
1639 | kfree(curr); | |
1640 | } | |
1641 | ||
1642 | list_for_each_entry_safe(curr, next, del_list, readdir_list) { | |
1643 | list_del(&curr->readdir_list); | |
1644 | if (atomic_dec_and_test(&curr->refs)) | |
1645 | kfree(curr); | |
1646 | } | |
02dbfc99 OS |
1647 | |
1648 | /* | |
1649 | * The VFS is going to do up_read(), so we need to downgrade back to a | |
1650 | * read lock. | |
1651 | */ | |
1652 | downgrade_write(&inode->i_rwsem); | |
16cdcec7 MX |
1653 | } |
1654 | ||
1655 | int btrfs_should_delete_dir_index(struct list_head *del_list, | |
1656 | u64 index) | |
1657 | { | |
1658 | struct btrfs_delayed_item *curr, *next; | |
1659 | int ret; | |
1660 | ||
1661 | if (list_empty(del_list)) | |
1662 | return 0; | |
1663 | ||
1664 | list_for_each_entry_safe(curr, next, del_list, readdir_list) { | |
1665 | if (curr->key.offset > index) | |
1666 | break; | |
1667 | ||
1668 | list_del(&curr->readdir_list); | |
1669 | ret = (curr->key.offset == index); | |
1670 | ||
1671 | if (atomic_dec_and_test(&curr->refs)) | |
1672 | kfree(curr); | |
1673 | ||
1674 | if (ret) | |
1675 | return 1; | |
1676 | else | |
1677 | continue; | |
1678 | } | |
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree | |
1684 | * | |
1685 | */ | |
9cdda8d3 | 1686 | int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, |
d2fbb2b5 | 1687 | struct list_head *ins_list) |
16cdcec7 MX |
1688 | { |
1689 | struct btrfs_dir_item *di; | |
1690 | struct btrfs_delayed_item *curr, *next; | |
1691 | struct btrfs_key location; | |
1692 | char *name; | |
1693 | int name_len; | |
1694 | int over = 0; | |
1695 | unsigned char d_type; | |
1696 | ||
1697 | if (list_empty(ins_list)) | |
1698 | return 0; | |
1699 | ||
1700 | /* | |
1701 | * Changing the data of the delayed item is impossible. So | |
1702 | * we needn't lock them. And we have held i_mutex of the | |
1703 | * directory, nobody can delete any directory indexes now. | |
1704 | */ | |
1705 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1706 | list_del(&curr->readdir_list); | |
1707 | ||
9cdda8d3 | 1708 | if (curr->key.offset < ctx->pos) { |
16cdcec7 MX |
1709 | if (atomic_dec_and_test(&curr->refs)) |
1710 | kfree(curr); | |
1711 | continue; | |
1712 | } | |
1713 | ||
9cdda8d3 | 1714 | ctx->pos = curr->key.offset; |
16cdcec7 MX |
1715 | |
1716 | di = (struct btrfs_dir_item *)curr->data; | |
1717 | name = (char *)(di + 1); | |
3cae210f | 1718 | name_len = btrfs_stack_dir_name_len(di); |
16cdcec7 MX |
1719 | |
1720 | d_type = btrfs_filetype_table[di->type]; | |
1721 | btrfs_disk_key_to_cpu(&location, &di->location); | |
1722 | ||
9cdda8d3 | 1723 | over = !dir_emit(ctx, name, name_len, |
16cdcec7 MX |
1724 | location.objectid, d_type); |
1725 | ||
1726 | if (atomic_dec_and_test(&curr->refs)) | |
1727 | kfree(curr); | |
1728 | ||
1729 | if (over) | |
1730 | return 1; | |
1731 | } | |
1732 | return 0; | |
1733 | } | |
1734 | ||
16cdcec7 MX |
1735 | static void fill_stack_inode_item(struct btrfs_trans_handle *trans, |
1736 | struct btrfs_inode_item *inode_item, | |
1737 | struct inode *inode) | |
1738 | { | |
2f2f43d3 EB |
1739 | btrfs_set_stack_inode_uid(inode_item, i_uid_read(inode)); |
1740 | btrfs_set_stack_inode_gid(inode_item, i_gid_read(inode)); | |
16cdcec7 MX |
1741 | btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size); |
1742 | btrfs_set_stack_inode_mode(inode_item, inode->i_mode); | |
1743 | btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink); | |
1744 | btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode)); | |
1745 | btrfs_set_stack_inode_generation(inode_item, | |
1746 | BTRFS_I(inode)->generation); | |
0c4d2d95 | 1747 | btrfs_set_stack_inode_sequence(inode_item, inode->i_version); |
16cdcec7 MX |
1748 | btrfs_set_stack_inode_transid(inode_item, trans->transid); |
1749 | btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev); | |
1750 | btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags); | |
ff5714cc | 1751 | btrfs_set_stack_inode_block_group(inode_item, 0); |
16cdcec7 | 1752 | |
a937b979 | 1753 | btrfs_set_stack_timespec_sec(&inode_item->atime, |
16cdcec7 | 1754 | inode->i_atime.tv_sec); |
a937b979 | 1755 | btrfs_set_stack_timespec_nsec(&inode_item->atime, |
16cdcec7 MX |
1756 | inode->i_atime.tv_nsec); |
1757 | ||
a937b979 | 1758 | btrfs_set_stack_timespec_sec(&inode_item->mtime, |
16cdcec7 | 1759 | inode->i_mtime.tv_sec); |
a937b979 | 1760 | btrfs_set_stack_timespec_nsec(&inode_item->mtime, |
16cdcec7 MX |
1761 | inode->i_mtime.tv_nsec); |
1762 | ||
a937b979 | 1763 | btrfs_set_stack_timespec_sec(&inode_item->ctime, |
16cdcec7 | 1764 | inode->i_ctime.tv_sec); |
a937b979 | 1765 | btrfs_set_stack_timespec_nsec(&inode_item->ctime, |
16cdcec7 | 1766 | inode->i_ctime.tv_nsec); |
9cc97d64 | 1767 | |
1768 | btrfs_set_stack_timespec_sec(&inode_item->otime, | |
1769 | BTRFS_I(inode)->i_otime.tv_sec); | |
1770 | btrfs_set_stack_timespec_nsec(&inode_item->otime, | |
1771 | BTRFS_I(inode)->i_otime.tv_nsec); | |
16cdcec7 MX |
1772 | } |
1773 | ||
2f7e33d4 MX |
1774 | int btrfs_fill_inode(struct inode *inode, u32 *rdev) |
1775 | { | |
1776 | struct btrfs_delayed_node *delayed_node; | |
1777 | struct btrfs_inode_item *inode_item; | |
2f7e33d4 MX |
1778 | |
1779 | delayed_node = btrfs_get_delayed_node(inode); | |
1780 | if (!delayed_node) | |
1781 | return -ENOENT; | |
1782 | ||
1783 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1784 | if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
2f7e33d4 MX |
1785 | mutex_unlock(&delayed_node->mutex); |
1786 | btrfs_release_delayed_node(delayed_node); | |
1787 | return -ENOENT; | |
1788 | } | |
1789 | ||
1790 | inode_item = &delayed_node->inode_item; | |
1791 | ||
2f2f43d3 EB |
1792 | i_uid_write(inode, btrfs_stack_inode_uid(inode_item)); |
1793 | i_gid_write(inode, btrfs_stack_inode_gid(inode_item)); | |
2f7e33d4 MX |
1794 | btrfs_i_size_write(inode, btrfs_stack_inode_size(inode_item)); |
1795 | inode->i_mode = btrfs_stack_inode_mode(inode_item); | |
bfe86848 | 1796 | set_nlink(inode, btrfs_stack_inode_nlink(inode_item)); |
2f7e33d4 MX |
1797 | inode_set_bytes(inode, btrfs_stack_inode_nbytes(inode_item)); |
1798 | BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item); | |
6e17d30b YD |
1799 | BTRFS_I(inode)->last_trans = btrfs_stack_inode_transid(inode_item); |
1800 | ||
0c4d2d95 | 1801 | inode->i_version = btrfs_stack_inode_sequence(inode_item); |
2f7e33d4 MX |
1802 | inode->i_rdev = 0; |
1803 | *rdev = btrfs_stack_inode_rdev(inode_item); | |
1804 | BTRFS_I(inode)->flags = btrfs_stack_inode_flags(inode_item); | |
1805 | ||
a937b979 DS |
1806 | inode->i_atime.tv_sec = btrfs_stack_timespec_sec(&inode_item->atime); |
1807 | inode->i_atime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->atime); | |
2f7e33d4 | 1808 | |
a937b979 DS |
1809 | inode->i_mtime.tv_sec = btrfs_stack_timespec_sec(&inode_item->mtime); |
1810 | inode->i_mtime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->mtime); | |
2f7e33d4 | 1811 | |
a937b979 DS |
1812 | inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(&inode_item->ctime); |
1813 | inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->ctime); | |
2f7e33d4 | 1814 | |
9cc97d64 | 1815 | BTRFS_I(inode)->i_otime.tv_sec = |
1816 | btrfs_stack_timespec_sec(&inode_item->otime); | |
1817 | BTRFS_I(inode)->i_otime.tv_nsec = | |
1818 | btrfs_stack_timespec_nsec(&inode_item->otime); | |
1819 | ||
2f7e33d4 MX |
1820 | inode->i_generation = BTRFS_I(inode)->generation; |
1821 | BTRFS_I(inode)->index_cnt = (u64)-1; | |
1822 | ||
1823 | mutex_unlock(&delayed_node->mutex); | |
1824 | btrfs_release_delayed_node(delayed_node); | |
1825 | return 0; | |
1826 | } | |
1827 | ||
16cdcec7 MX |
1828 | int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, |
1829 | struct btrfs_root *root, struct inode *inode) | |
1830 | { | |
1831 | struct btrfs_delayed_node *delayed_node; | |
aa0467d8 | 1832 | int ret = 0; |
16cdcec7 MX |
1833 | |
1834 | delayed_node = btrfs_get_or_create_delayed_node(inode); | |
1835 | if (IS_ERR(delayed_node)) | |
1836 | return PTR_ERR(delayed_node); | |
1837 | ||
1838 | mutex_lock(&delayed_node->mutex); | |
7cf35d91 | 1839 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
16cdcec7 MX |
1840 | fill_stack_inode_item(trans, &delayed_node->inode_item, inode); |
1841 | goto release_node; | |
1842 | } | |
1843 | ||
7fd2ae21 JB |
1844 | ret = btrfs_delayed_inode_reserve_metadata(trans, root, inode, |
1845 | delayed_node); | |
c06a0e12 JB |
1846 | if (ret) |
1847 | goto release_node; | |
16cdcec7 MX |
1848 | |
1849 | fill_stack_inode_item(trans, &delayed_node->inode_item, inode); | |
7cf35d91 | 1850 | set_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); |
16cdcec7 MX |
1851 | delayed_node->count++; |
1852 | atomic_inc(&root->fs_info->delayed_root->items); | |
1853 | release_node: | |
1854 | mutex_unlock(&delayed_node->mutex); | |
1855 | btrfs_release_delayed_node(delayed_node); | |
1856 | return ret; | |
1857 | } | |
1858 | ||
67de1176 MX |
1859 | int btrfs_delayed_delete_inode_ref(struct inode *inode) |
1860 | { | |
0b246afa | 1861 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
67de1176 MX |
1862 | struct btrfs_delayed_node *delayed_node; |
1863 | ||
6f896054 CM |
1864 | /* |
1865 | * we don't do delayed inode updates during log recovery because it | |
1866 | * leads to enospc problems. This means we also can't do | |
1867 | * delayed inode refs | |
1868 | */ | |
0b246afa | 1869 | if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) |
6f896054 CM |
1870 | return -EAGAIN; |
1871 | ||
67de1176 MX |
1872 | delayed_node = btrfs_get_or_create_delayed_node(inode); |
1873 | if (IS_ERR(delayed_node)) | |
1874 | return PTR_ERR(delayed_node); | |
1875 | ||
1876 | /* | |
1877 | * We don't reserve space for inode ref deletion is because: | |
1878 | * - We ONLY do async inode ref deletion for the inode who has only | |
1879 | * one link(i_nlink == 1), it means there is only one inode ref. | |
1880 | * And in most case, the inode ref and the inode item are in the | |
1881 | * same leaf, and we will deal with them at the same time. | |
1882 | * Since we are sure we will reserve the space for the inode item, | |
1883 | * it is unnecessary to reserve space for inode ref deletion. | |
1884 | * - If the inode ref and the inode item are not in the same leaf, | |
1885 | * We also needn't worry about enospc problem, because we reserve | |
1886 | * much more space for the inode update than it needs. | |
1887 | * - At the worst, we can steal some space from the global reservation. | |
1888 | * It is very rare. | |
1889 | */ | |
1890 | mutex_lock(&delayed_node->mutex); | |
1891 | if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) | |
1892 | goto release_node; | |
1893 | ||
1894 | set_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); | |
1895 | delayed_node->count++; | |
0b246afa | 1896 | atomic_inc(&fs_info->delayed_root->items); |
67de1176 MX |
1897 | release_node: |
1898 | mutex_unlock(&delayed_node->mutex); | |
1899 | btrfs_release_delayed_node(delayed_node); | |
1900 | return 0; | |
1901 | } | |
1902 | ||
16cdcec7 MX |
1903 | static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) |
1904 | { | |
1905 | struct btrfs_root *root = delayed_node->root; | |
2ff7e61e | 1906 | struct btrfs_fs_info *fs_info = root->fs_info; |
16cdcec7 MX |
1907 | struct btrfs_delayed_item *curr_item, *prev_item; |
1908 | ||
1909 | mutex_lock(&delayed_node->mutex); | |
1910 | curr_item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1911 | while (curr_item) { | |
2ff7e61e | 1912 | btrfs_delayed_item_release_metadata(fs_info, curr_item); |
16cdcec7 MX |
1913 | prev_item = curr_item; |
1914 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1915 | btrfs_release_delayed_item(prev_item); | |
1916 | } | |
1917 | ||
1918 | curr_item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1919 | while (curr_item) { | |
2ff7e61e | 1920 | btrfs_delayed_item_release_metadata(fs_info, curr_item); |
16cdcec7 MX |
1921 | prev_item = curr_item; |
1922 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1923 | btrfs_release_delayed_item(prev_item); | |
1924 | } | |
1925 | ||
67de1176 MX |
1926 | if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) |
1927 | btrfs_release_delayed_iref(delayed_node); | |
1928 | ||
7cf35d91 | 1929 | if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { |
2ff7e61e | 1930 | btrfs_delayed_inode_release_metadata(fs_info, delayed_node); |
16cdcec7 MX |
1931 | btrfs_release_delayed_inode(delayed_node); |
1932 | } | |
1933 | mutex_unlock(&delayed_node->mutex); | |
1934 | } | |
1935 | ||
1936 | void btrfs_kill_delayed_inode_items(struct inode *inode) | |
1937 | { | |
1938 | struct btrfs_delayed_node *delayed_node; | |
1939 | ||
1940 | delayed_node = btrfs_get_delayed_node(inode); | |
1941 | if (!delayed_node) | |
1942 | return; | |
1943 | ||
1944 | __btrfs_kill_delayed_node(delayed_node); | |
1945 | btrfs_release_delayed_node(delayed_node); | |
1946 | } | |
1947 | ||
1948 | void btrfs_kill_all_delayed_nodes(struct btrfs_root *root) | |
1949 | { | |
1950 | u64 inode_id = 0; | |
1951 | struct btrfs_delayed_node *delayed_nodes[8]; | |
1952 | int i, n; | |
1953 | ||
1954 | while (1) { | |
1955 | spin_lock(&root->inode_lock); | |
1956 | n = radix_tree_gang_lookup(&root->delayed_nodes_tree, | |
1957 | (void **)delayed_nodes, inode_id, | |
1958 | ARRAY_SIZE(delayed_nodes)); | |
1959 | if (!n) { | |
1960 | spin_unlock(&root->inode_lock); | |
1961 | break; | |
1962 | } | |
1963 | ||
1964 | inode_id = delayed_nodes[n - 1]->inode_id + 1; | |
1965 | ||
1966 | for (i = 0; i < n; i++) | |
1967 | atomic_inc(&delayed_nodes[i]->refs); | |
1968 | spin_unlock(&root->inode_lock); | |
1969 | ||
1970 | for (i = 0; i < n; i++) { | |
1971 | __btrfs_kill_delayed_node(delayed_nodes[i]); | |
1972 | btrfs_release_delayed_node(delayed_nodes[i]); | |
1973 | } | |
1974 | } | |
1975 | } | |
67cde344 | 1976 | |
ccdf9b30 | 1977 | void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info) |
67cde344 | 1978 | { |
67cde344 MX |
1979 | struct btrfs_delayed_node *curr_node, *prev_node; |
1980 | ||
ccdf9b30 | 1981 | curr_node = btrfs_first_delayed_node(fs_info->delayed_root); |
67cde344 MX |
1982 | while (curr_node) { |
1983 | __btrfs_kill_delayed_node(curr_node); | |
1984 | ||
1985 | prev_node = curr_node; | |
1986 | curr_node = btrfs_next_delayed_node(curr_node); | |
1987 | btrfs_release_delayed_node(prev_node); | |
1988 | } | |
1989 | } | |
1990 |