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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" | |
24 | ||
25 | #define BTRFS_DELAYED_WRITEBACK 400 | |
26 | #define BTRFS_DELAYED_BACKGROUND 100 | |
27 | ||
28 | static struct kmem_cache *delayed_node_cache; | |
29 | ||
30 | int __init btrfs_delayed_inode_init(void) | |
31 | { | |
32 | delayed_node_cache = kmem_cache_create("delayed_node", | |
33 | sizeof(struct btrfs_delayed_node), | |
34 | 0, | |
35 | SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, | |
36 | NULL); | |
37 | if (!delayed_node_cache) | |
38 | return -ENOMEM; | |
39 | return 0; | |
40 | } | |
41 | ||
42 | void btrfs_delayed_inode_exit(void) | |
43 | { | |
44 | if (delayed_node_cache) | |
45 | kmem_cache_destroy(delayed_node_cache); | |
46 | } | |
47 | ||
48 | static inline void btrfs_init_delayed_node( | |
49 | struct btrfs_delayed_node *delayed_node, | |
50 | struct btrfs_root *root, u64 inode_id) | |
51 | { | |
52 | delayed_node->root = root; | |
53 | delayed_node->inode_id = inode_id; | |
54 | atomic_set(&delayed_node->refs, 0); | |
55 | delayed_node->count = 0; | |
56 | delayed_node->in_list = 0; | |
57 | delayed_node->inode_dirty = 0; | |
58 | delayed_node->ins_root = RB_ROOT; | |
59 | delayed_node->del_root = RB_ROOT; | |
60 | mutex_init(&delayed_node->mutex); | |
61 | delayed_node->index_cnt = 0; | |
62 | INIT_LIST_HEAD(&delayed_node->n_list); | |
63 | INIT_LIST_HEAD(&delayed_node->p_list); | |
64 | delayed_node->bytes_reserved = 0; | |
65 | } | |
66 | ||
67 | static inline int btrfs_is_continuous_delayed_item( | |
68 | struct btrfs_delayed_item *item1, | |
69 | struct btrfs_delayed_item *item2) | |
70 | { | |
71 | if (item1->key.type == BTRFS_DIR_INDEX_KEY && | |
72 | item1->key.objectid == item2->key.objectid && | |
73 | item1->key.type == item2->key.type && | |
74 | item1->key.offset + 1 == item2->key.offset) | |
75 | return 1; | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static inline struct btrfs_delayed_root *btrfs_get_delayed_root( | |
80 | struct btrfs_root *root) | |
81 | { | |
82 | return root->fs_info->delayed_root; | |
83 | } | |
84 | ||
2f7e33d4 | 85 | static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode) |
16cdcec7 | 86 | { |
16cdcec7 MX |
87 | struct btrfs_inode *btrfs_inode = BTRFS_I(inode); |
88 | struct btrfs_root *root = btrfs_inode->root; | |
0d0ca30f | 89 | u64 ino = btrfs_ino(inode); |
2f7e33d4 | 90 | struct btrfs_delayed_node *node; |
16cdcec7 | 91 | |
16cdcec7 MX |
92 | node = ACCESS_ONCE(btrfs_inode->delayed_node); |
93 | if (node) { | |
2f7e33d4 | 94 | atomic_inc(&node->refs); |
16cdcec7 MX |
95 | return node; |
96 | } | |
97 | ||
98 | spin_lock(&root->inode_lock); | |
0d0ca30f | 99 | node = radix_tree_lookup(&root->delayed_nodes_tree, ino); |
16cdcec7 MX |
100 | if (node) { |
101 | if (btrfs_inode->delayed_node) { | |
2f7e33d4 MX |
102 | atomic_inc(&node->refs); /* can be accessed */ |
103 | BUG_ON(btrfs_inode->delayed_node != node); | |
16cdcec7 | 104 | spin_unlock(&root->inode_lock); |
2f7e33d4 | 105 | return node; |
16cdcec7 MX |
106 | } |
107 | btrfs_inode->delayed_node = node; | |
108 | atomic_inc(&node->refs); /* can be accessed */ | |
109 | atomic_inc(&node->refs); /* cached in the inode */ | |
110 | spin_unlock(&root->inode_lock); | |
111 | return node; | |
112 | } | |
113 | spin_unlock(&root->inode_lock); | |
114 | ||
2f7e33d4 MX |
115 | return NULL; |
116 | } | |
117 | ||
118 | static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node( | |
119 | struct inode *inode) | |
120 | { | |
121 | struct btrfs_delayed_node *node; | |
122 | struct btrfs_inode *btrfs_inode = BTRFS_I(inode); | |
123 | struct btrfs_root *root = btrfs_inode->root; | |
124 | u64 ino = btrfs_ino(inode); | |
125 | int ret; | |
126 | ||
127 | again: | |
128 | node = btrfs_get_delayed_node(inode); | |
129 | if (node) | |
130 | return node; | |
131 | ||
16cdcec7 MX |
132 | node = kmem_cache_alloc(delayed_node_cache, GFP_NOFS); |
133 | if (!node) | |
134 | return ERR_PTR(-ENOMEM); | |
0d0ca30f | 135 | btrfs_init_delayed_node(node, root, ino); |
16cdcec7 MX |
136 | |
137 | atomic_inc(&node->refs); /* cached in the btrfs inode */ | |
138 | atomic_inc(&node->refs); /* can be accessed */ | |
139 | ||
140 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); | |
141 | if (ret) { | |
142 | kmem_cache_free(delayed_node_cache, node); | |
143 | return ERR_PTR(ret); | |
144 | } | |
145 | ||
146 | spin_lock(&root->inode_lock); | |
0d0ca30f | 147 | ret = radix_tree_insert(&root->delayed_nodes_tree, ino, node); |
16cdcec7 MX |
148 | if (ret == -EEXIST) { |
149 | kmem_cache_free(delayed_node_cache, node); | |
150 | spin_unlock(&root->inode_lock); | |
151 | radix_tree_preload_end(); | |
152 | goto again; | |
153 | } | |
154 | btrfs_inode->delayed_node = node; | |
155 | spin_unlock(&root->inode_lock); | |
156 | radix_tree_preload_end(); | |
157 | ||
158 | return node; | |
159 | } | |
160 | ||
161 | /* | |
162 | * Call it when holding delayed_node->mutex | |
163 | * | |
164 | * If mod = 1, add this node into the prepared list. | |
165 | */ | |
166 | static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root, | |
167 | struct btrfs_delayed_node *node, | |
168 | int mod) | |
169 | { | |
170 | spin_lock(&root->lock); | |
171 | if (node->in_list) { | |
172 | if (!list_empty(&node->p_list)) | |
173 | list_move_tail(&node->p_list, &root->prepare_list); | |
174 | else if (mod) | |
175 | list_add_tail(&node->p_list, &root->prepare_list); | |
176 | } else { | |
177 | list_add_tail(&node->n_list, &root->node_list); | |
178 | list_add_tail(&node->p_list, &root->prepare_list); | |
179 | atomic_inc(&node->refs); /* inserted into list */ | |
180 | root->nodes++; | |
181 | node->in_list = 1; | |
182 | } | |
183 | spin_unlock(&root->lock); | |
184 | } | |
185 | ||
186 | /* Call it when holding delayed_node->mutex */ | |
187 | static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root, | |
188 | struct btrfs_delayed_node *node) | |
189 | { | |
190 | spin_lock(&root->lock); | |
191 | if (node->in_list) { | |
192 | root->nodes--; | |
193 | atomic_dec(&node->refs); /* not in the list */ | |
194 | list_del_init(&node->n_list); | |
195 | if (!list_empty(&node->p_list)) | |
196 | list_del_init(&node->p_list); | |
197 | node->in_list = 0; | |
198 | } | |
199 | spin_unlock(&root->lock); | |
200 | } | |
201 | ||
202 | struct btrfs_delayed_node *btrfs_first_delayed_node( | |
203 | struct btrfs_delayed_root *delayed_root) | |
204 | { | |
205 | struct list_head *p; | |
206 | struct btrfs_delayed_node *node = NULL; | |
207 | ||
208 | spin_lock(&delayed_root->lock); | |
209 | if (list_empty(&delayed_root->node_list)) | |
210 | goto out; | |
211 | ||
212 | p = delayed_root->node_list.next; | |
213 | node = list_entry(p, struct btrfs_delayed_node, n_list); | |
214 | atomic_inc(&node->refs); | |
215 | out: | |
216 | spin_unlock(&delayed_root->lock); | |
217 | ||
218 | return node; | |
219 | } | |
220 | ||
221 | struct btrfs_delayed_node *btrfs_next_delayed_node( | |
222 | struct btrfs_delayed_node *node) | |
223 | { | |
224 | struct btrfs_delayed_root *delayed_root; | |
225 | struct list_head *p; | |
226 | struct btrfs_delayed_node *next = NULL; | |
227 | ||
228 | delayed_root = node->root->fs_info->delayed_root; | |
229 | spin_lock(&delayed_root->lock); | |
230 | if (!node->in_list) { /* not in the list */ | |
231 | if (list_empty(&delayed_root->node_list)) | |
232 | goto out; | |
233 | p = delayed_root->node_list.next; | |
234 | } else if (list_is_last(&node->n_list, &delayed_root->node_list)) | |
235 | goto out; | |
236 | else | |
237 | p = node->n_list.next; | |
238 | ||
239 | next = list_entry(p, struct btrfs_delayed_node, n_list); | |
240 | atomic_inc(&next->refs); | |
241 | out: | |
242 | spin_unlock(&delayed_root->lock); | |
243 | ||
244 | return next; | |
245 | } | |
246 | ||
247 | static void __btrfs_release_delayed_node( | |
248 | struct btrfs_delayed_node *delayed_node, | |
249 | int mod) | |
250 | { | |
251 | struct btrfs_delayed_root *delayed_root; | |
252 | ||
253 | if (!delayed_node) | |
254 | return; | |
255 | ||
256 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
257 | ||
258 | mutex_lock(&delayed_node->mutex); | |
259 | if (delayed_node->count) | |
260 | btrfs_queue_delayed_node(delayed_root, delayed_node, mod); | |
261 | else | |
262 | btrfs_dequeue_delayed_node(delayed_root, delayed_node); | |
263 | mutex_unlock(&delayed_node->mutex); | |
264 | ||
265 | if (atomic_dec_and_test(&delayed_node->refs)) { | |
266 | struct btrfs_root *root = delayed_node->root; | |
267 | spin_lock(&root->inode_lock); | |
268 | if (atomic_read(&delayed_node->refs) == 0) { | |
269 | radix_tree_delete(&root->delayed_nodes_tree, | |
270 | delayed_node->inode_id); | |
271 | kmem_cache_free(delayed_node_cache, delayed_node); | |
272 | } | |
273 | spin_unlock(&root->inode_lock); | |
274 | } | |
275 | } | |
276 | ||
277 | static inline void btrfs_release_delayed_node(struct btrfs_delayed_node *node) | |
278 | { | |
279 | __btrfs_release_delayed_node(node, 0); | |
280 | } | |
281 | ||
282 | struct btrfs_delayed_node *btrfs_first_prepared_delayed_node( | |
283 | struct btrfs_delayed_root *delayed_root) | |
284 | { | |
285 | struct list_head *p; | |
286 | struct btrfs_delayed_node *node = NULL; | |
287 | ||
288 | spin_lock(&delayed_root->lock); | |
289 | if (list_empty(&delayed_root->prepare_list)) | |
290 | goto out; | |
291 | ||
292 | p = delayed_root->prepare_list.next; | |
293 | list_del_init(p); | |
294 | node = list_entry(p, struct btrfs_delayed_node, p_list); | |
295 | atomic_inc(&node->refs); | |
296 | out: | |
297 | spin_unlock(&delayed_root->lock); | |
298 | ||
299 | return node; | |
300 | } | |
301 | ||
302 | static inline void btrfs_release_prepared_delayed_node( | |
303 | struct btrfs_delayed_node *node) | |
304 | { | |
305 | __btrfs_release_delayed_node(node, 1); | |
306 | } | |
307 | ||
308 | struct btrfs_delayed_item *btrfs_alloc_delayed_item(u32 data_len) | |
309 | { | |
310 | struct btrfs_delayed_item *item; | |
311 | item = kmalloc(sizeof(*item) + data_len, GFP_NOFS); | |
312 | if (item) { | |
313 | item->data_len = data_len; | |
314 | item->ins_or_del = 0; | |
315 | item->bytes_reserved = 0; | |
16cdcec7 MX |
316 | item->delayed_node = NULL; |
317 | atomic_set(&item->refs, 1); | |
318 | } | |
319 | return item; | |
320 | } | |
321 | ||
322 | /* | |
323 | * __btrfs_lookup_delayed_item - look up the delayed item by key | |
324 | * @delayed_node: pointer to the delayed node | |
325 | * @key: the key to look up | |
326 | * @prev: used to store the prev item if the right item isn't found | |
327 | * @next: used to store the next item if the right item isn't found | |
328 | * | |
329 | * Note: if we don't find the right item, we will return the prev item and | |
330 | * the next item. | |
331 | */ | |
332 | static struct btrfs_delayed_item *__btrfs_lookup_delayed_item( | |
333 | struct rb_root *root, | |
334 | struct btrfs_key *key, | |
335 | struct btrfs_delayed_item **prev, | |
336 | struct btrfs_delayed_item **next) | |
337 | { | |
338 | struct rb_node *node, *prev_node = NULL; | |
339 | struct btrfs_delayed_item *delayed_item = NULL; | |
340 | int ret = 0; | |
341 | ||
342 | node = root->rb_node; | |
343 | ||
344 | while (node) { | |
345 | delayed_item = rb_entry(node, struct btrfs_delayed_item, | |
346 | rb_node); | |
347 | prev_node = node; | |
348 | ret = btrfs_comp_cpu_keys(&delayed_item->key, key); | |
349 | if (ret < 0) | |
350 | node = node->rb_right; | |
351 | else if (ret > 0) | |
352 | node = node->rb_left; | |
353 | else | |
354 | return delayed_item; | |
355 | } | |
356 | ||
357 | if (prev) { | |
358 | if (!prev_node) | |
359 | *prev = NULL; | |
360 | else if (ret < 0) | |
361 | *prev = delayed_item; | |
362 | else if ((node = rb_prev(prev_node)) != NULL) { | |
363 | *prev = rb_entry(node, struct btrfs_delayed_item, | |
364 | rb_node); | |
365 | } else | |
366 | *prev = NULL; | |
367 | } | |
368 | ||
369 | if (next) { | |
370 | if (!prev_node) | |
371 | *next = NULL; | |
372 | else if (ret > 0) | |
373 | *next = delayed_item; | |
374 | else if ((node = rb_next(prev_node)) != NULL) { | |
375 | *next = rb_entry(node, struct btrfs_delayed_item, | |
376 | rb_node); | |
377 | } else | |
378 | *next = NULL; | |
379 | } | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item( | |
384 | struct btrfs_delayed_node *delayed_node, | |
385 | struct btrfs_key *key) | |
386 | { | |
387 | struct btrfs_delayed_item *item; | |
388 | ||
389 | item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key, | |
390 | NULL, NULL); | |
391 | return item; | |
392 | } | |
393 | ||
394 | struct btrfs_delayed_item *__btrfs_lookup_delayed_deletion_item( | |
395 | struct btrfs_delayed_node *delayed_node, | |
396 | struct btrfs_key *key) | |
397 | { | |
398 | struct btrfs_delayed_item *item; | |
399 | ||
400 | item = __btrfs_lookup_delayed_item(&delayed_node->del_root, key, | |
401 | NULL, NULL); | |
402 | return item; | |
403 | } | |
404 | ||
405 | struct btrfs_delayed_item *__btrfs_search_delayed_insertion_item( | |
406 | struct btrfs_delayed_node *delayed_node, | |
407 | struct btrfs_key *key) | |
408 | { | |
409 | struct btrfs_delayed_item *item, *next; | |
410 | ||
411 | item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key, | |
412 | NULL, &next); | |
413 | if (!item) | |
414 | item = next; | |
415 | ||
416 | return item; | |
417 | } | |
418 | ||
419 | struct btrfs_delayed_item *__btrfs_search_delayed_deletion_item( | |
420 | struct btrfs_delayed_node *delayed_node, | |
421 | struct btrfs_key *key) | |
422 | { | |
423 | struct btrfs_delayed_item *item, *next; | |
424 | ||
425 | item = __btrfs_lookup_delayed_item(&delayed_node->del_root, key, | |
426 | NULL, &next); | |
427 | if (!item) | |
428 | item = next; | |
429 | ||
430 | return item; | |
431 | } | |
432 | ||
433 | static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node, | |
434 | struct btrfs_delayed_item *ins, | |
435 | int action) | |
436 | { | |
437 | struct rb_node **p, *node; | |
438 | struct rb_node *parent_node = NULL; | |
439 | struct rb_root *root; | |
440 | struct btrfs_delayed_item *item; | |
441 | int cmp; | |
442 | ||
443 | if (action == BTRFS_DELAYED_INSERTION_ITEM) | |
444 | root = &delayed_node->ins_root; | |
445 | else if (action == BTRFS_DELAYED_DELETION_ITEM) | |
446 | root = &delayed_node->del_root; | |
447 | else | |
448 | BUG(); | |
449 | p = &root->rb_node; | |
450 | node = &ins->rb_node; | |
451 | ||
452 | while (*p) { | |
453 | parent_node = *p; | |
454 | item = rb_entry(parent_node, struct btrfs_delayed_item, | |
455 | rb_node); | |
456 | ||
457 | cmp = btrfs_comp_cpu_keys(&item->key, &ins->key); | |
458 | if (cmp < 0) | |
459 | p = &(*p)->rb_right; | |
460 | else if (cmp > 0) | |
461 | p = &(*p)->rb_left; | |
462 | else | |
463 | return -EEXIST; | |
464 | } | |
465 | ||
466 | rb_link_node(node, parent_node, p); | |
467 | rb_insert_color(node, root); | |
468 | ins->delayed_node = delayed_node; | |
469 | ins->ins_or_del = action; | |
470 | ||
471 | if (ins->key.type == BTRFS_DIR_INDEX_KEY && | |
472 | action == BTRFS_DELAYED_INSERTION_ITEM && | |
473 | ins->key.offset >= delayed_node->index_cnt) | |
474 | delayed_node->index_cnt = ins->key.offset + 1; | |
475 | ||
476 | delayed_node->count++; | |
477 | atomic_inc(&delayed_node->root->fs_info->delayed_root->items); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int __btrfs_add_delayed_insertion_item(struct btrfs_delayed_node *node, | |
482 | struct btrfs_delayed_item *item) | |
483 | { | |
484 | return __btrfs_add_delayed_item(node, item, | |
485 | BTRFS_DELAYED_INSERTION_ITEM); | |
486 | } | |
487 | ||
488 | static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node, | |
489 | struct btrfs_delayed_item *item) | |
490 | { | |
491 | return __btrfs_add_delayed_item(node, item, | |
492 | BTRFS_DELAYED_DELETION_ITEM); | |
493 | } | |
494 | ||
495 | static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item) | |
496 | { | |
497 | struct rb_root *root; | |
498 | struct btrfs_delayed_root *delayed_root; | |
499 | ||
500 | delayed_root = delayed_item->delayed_node->root->fs_info->delayed_root; | |
501 | ||
502 | BUG_ON(!delayed_root); | |
503 | BUG_ON(delayed_item->ins_or_del != BTRFS_DELAYED_DELETION_ITEM && | |
504 | delayed_item->ins_or_del != BTRFS_DELAYED_INSERTION_ITEM); | |
505 | ||
506 | if (delayed_item->ins_or_del == BTRFS_DELAYED_INSERTION_ITEM) | |
507 | root = &delayed_item->delayed_node->ins_root; | |
508 | else | |
509 | root = &delayed_item->delayed_node->del_root; | |
510 | ||
511 | rb_erase(&delayed_item->rb_node, root); | |
512 | delayed_item->delayed_node->count--; | |
513 | atomic_dec(&delayed_root->items); | |
514 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND && | |
515 | waitqueue_active(&delayed_root->wait)) | |
516 | wake_up(&delayed_root->wait); | |
517 | } | |
518 | ||
519 | static void btrfs_release_delayed_item(struct btrfs_delayed_item *item) | |
520 | { | |
521 | if (item) { | |
522 | __btrfs_remove_delayed_item(item); | |
523 | if (atomic_dec_and_test(&item->refs)) | |
524 | kfree(item); | |
525 | } | |
526 | } | |
527 | ||
528 | struct btrfs_delayed_item *__btrfs_first_delayed_insertion_item( | |
529 | struct btrfs_delayed_node *delayed_node) | |
530 | { | |
531 | struct rb_node *p; | |
532 | struct btrfs_delayed_item *item = NULL; | |
533 | ||
534 | p = rb_first(&delayed_node->ins_root); | |
535 | if (p) | |
536 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
537 | ||
538 | return item; | |
539 | } | |
540 | ||
541 | struct btrfs_delayed_item *__btrfs_first_delayed_deletion_item( | |
542 | struct btrfs_delayed_node *delayed_node) | |
543 | { | |
544 | struct rb_node *p; | |
545 | struct btrfs_delayed_item *item = NULL; | |
546 | ||
547 | p = rb_first(&delayed_node->del_root); | |
548 | if (p) | |
549 | item = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
550 | ||
551 | return item; | |
552 | } | |
553 | ||
554 | struct btrfs_delayed_item *__btrfs_next_delayed_item( | |
555 | struct btrfs_delayed_item *item) | |
556 | { | |
557 | struct rb_node *p; | |
558 | struct btrfs_delayed_item *next = NULL; | |
559 | ||
560 | p = rb_next(&item->rb_node); | |
561 | if (p) | |
562 | next = rb_entry(p, struct btrfs_delayed_item, rb_node); | |
563 | ||
564 | return next; | |
565 | } | |
566 | ||
16cdcec7 MX |
567 | static inline struct btrfs_root *btrfs_get_fs_root(struct btrfs_root *root, |
568 | u64 root_id) | |
569 | { | |
570 | struct btrfs_key root_key; | |
571 | ||
572 | if (root->objectid == root_id) | |
573 | return root; | |
574 | ||
575 | root_key.objectid = root_id; | |
576 | root_key.type = BTRFS_ROOT_ITEM_KEY; | |
577 | root_key.offset = (u64)-1; | |
578 | return btrfs_read_fs_root_no_name(root->fs_info, &root_key); | |
579 | } | |
580 | ||
581 | static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans, | |
582 | struct btrfs_root *root, | |
583 | struct btrfs_delayed_item *item) | |
584 | { | |
585 | struct btrfs_block_rsv *src_rsv; | |
586 | struct btrfs_block_rsv *dst_rsv; | |
587 | u64 num_bytes; | |
588 | int ret; | |
589 | ||
590 | if (!trans->bytes_reserved) | |
591 | return 0; | |
592 | ||
593 | src_rsv = trans->block_rsv; | |
6d668dda | 594 | dst_rsv = &root->fs_info->delayed_block_rsv; |
16cdcec7 MX |
595 | |
596 | num_bytes = btrfs_calc_trans_metadata_size(root, 1); | |
597 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes); | |
8c2a3ca2 JB |
598 | if (!ret) { |
599 | trace_btrfs_space_reservation(root->fs_info, "delayed_item", | |
600 | item->key.objectid, | |
601 | num_bytes, 1); | |
16cdcec7 | 602 | item->bytes_reserved = num_bytes; |
8c2a3ca2 | 603 | } |
16cdcec7 MX |
604 | |
605 | return ret; | |
606 | } | |
607 | ||
608 | static void btrfs_delayed_item_release_metadata(struct btrfs_root *root, | |
609 | struct btrfs_delayed_item *item) | |
610 | { | |
19fd2949 MX |
611 | struct btrfs_block_rsv *rsv; |
612 | ||
16cdcec7 MX |
613 | if (!item->bytes_reserved) |
614 | return; | |
615 | ||
6d668dda | 616 | rsv = &root->fs_info->delayed_block_rsv; |
8c2a3ca2 JB |
617 | trace_btrfs_space_reservation(root->fs_info, "delayed_item", |
618 | item->key.objectid, item->bytes_reserved, | |
619 | 0); | |
19fd2949 | 620 | btrfs_block_rsv_release(root, rsv, |
16cdcec7 MX |
621 | item->bytes_reserved); |
622 | } | |
623 | ||
624 | static int btrfs_delayed_inode_reserve_metadata( | |
625 | struct btrfs_trans_handle *trans, | |
626 | struct btrfs_root *root, | |
7fd2ae21 | 627 | struct inode *inode, |
16cdcec7 MX |
628 | struct btrfs_delayed_node *node) |
629 | { | |
630 | struct btrfs_block_rsv *src_rsv; | |
631 | struct btrfs_block_rsv *dst_rsv; | |
632 | u64 num_bytes; | |
633 | int ret; | |
8c2a3ca2 | 634 | bool release = false; |
16cdcec7 | 635 | |
16cdcec7 | 636 | src_rsv = trans->block_rsv; |
6d668dda | 637 | dst_rsv = &root->fs_info->delayed_block_rsv; |
16cdcec7 MX |
638 | |
639 | num_bytes = btrfs_calc_trans_metadata_size(root, 1); | |
c06a0e12 JB |
640 | |
641 | /* | |
642 | * btrfs_dirty_inode will update the inode under btrfs_join_transaction | |
643 | * which doesn't reserve space for speed. This is a problem since we | |
644 | * still need to reserve space for this update, so try to reserve the | |
645 | * space. | |
646 | * | |
647 | * Now if src_rsv == delalloc_block_rsv we'll let it just steal since | |
648 | * we're accounted for. | |
649 | */ | |
e755d9ab CM |
650 | if (!src_rsv || (!trans->bytes_reserved && |
651 | src_rsv != &root->fs_info->delalloc_block_rsv)) { | |
c06a0e12 JB |
652 | ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes); |
653 | /* | |
654 | * Since we're under a transaction reserve_metadata_bytes could | |
655 | * try to commit the transaction which will make it return | |
656 | * EAGAIN to make us stop the transaction we have, so return | |
657 | * ENOSPC instead so that btrfs_dirty_inode knows what to do. | |
658 | */ | |
659 | if (ret == -EAGAIN) | |
660 | ret = -ENOSPC; | |
8c2a3ca2 | 661 | if (!ret) { |
c06a0e12 | 662 | node->bytes_reserved = num_bytes; |
8c2a3ca2 JB |
663 | trace_btrfs_space_reservation(root->fs_info, |
664 | "delayed_inode", | |
665 | btrfs_ino(inode), | |
666 | num_bytes, 1); | |
667 | } | |
c06a0e12 | 668 | return ret; |
7fd2ae21 JB |
669 | } else if (src_rsv == &root->fs_info->delalloc_block_rsv) { |
670 | spin_lock(&BTRFS_I(inode)->lock); | |
671 | if (BTRFS_I(inode)->delalloc_meta_reserved) { | |
672 | BTRFS_I(inode)->delalloc_meta_reserved = 0; | |
673 | spin_unlock(&BTRFS_I(inode)->lock); | |
674 | release = true; | |
675 | goto migrate; | |
676 | } | |
677 | spin_unlock(&BTRFS_I(inode)->lock); | |
678 | ||
679 | /* Ok we didn't have space pre-reserved. This shouldn't happen | |
680 | * too often but it can happen if we do delalloc to an existing | |
681 | * inode which gets dirtied because of the time update, and then | |
682 | * isn't touched again until after the transaction commits and | |
683 | * then we try to write out the data. First try to be nice and | |
684 | * reserve something strictly for us. If not be a pain and try | |
685 | * to steal from the delalloc block rsv. | |
686 | */ | |
687 | ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes); | |
688 | if (!ret) | |
689 | goto out; | |
690 | ||
691 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes); | |
692 | if (!ret) | |
693 | goto out; | |
694 | ||
695 | /* | |
696 | * Ok this is a problem, let's just steal from the global rsv | |
697 | * since this really shouldn't happen that often. | |
698 | */ | |
699 | WARN_ON(1); | |
700 | ret = btrfs_block_rsv_migrate(&root->fs_info->global_block_rsv, | |
701 | dst_rsv, num_bytes); | |
702 | goto out; | |
c06a0e12 JB |
703 | } |
704 | ||
7fd2ae21 | 705 | migrate: |
16cdcec7 | 706 | ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes); |
7fd2ae21 JB |
707 | |
708 | out: | |
709 | /* | |
710 | * Migrate only takes a reservation, it doesn't touch the size of the | |
711 | * block_rsv. This is to simplify people who don't normally have things | |
712 | * migrated from their block rsv. If they go to release their | |
713 | * reservation, that will decrease the size as well, so if migrate | |
714 | * reduced size we'd end up with a negative size. But for the | |
715 | * delalloc_meta_reserved stuff we will only know to drop 1 reservation, | |
716 | * but we could in fact do this reserve/migrate dance several times | |
717 | * between the time we did the original reservation and we'd clean it | |
718 | * up. So to take care of this, release the space for the meta | |
719 | * reservation here. I think it may be time for a documentation page on | |
720 | * how block rsvs. work. | |
721 | */ | |
8c2a3ca2 JB |
722 | if (!ret) { |
723 | trace_btrfs_space_reservation(root->fs_info, "delayed_inode", | |
724 | btrfs_ino(inode), num_bytes, 1); | |
16cdcec7 | 725 | node->bytes_reserved = num_bytes; |
8c2a3ca2 | 726 | } |
16cdcec7 | 727 | |
8c2a3ca2 JB |
728 | if (release) { |
729 | trace_btrfs_space_reservation(root->fs_info, "delalloc", | |
730 | btrfs_ino(inode), num_bytes, 0); | |
7fd2ae21 | 731 | btrfs_block_rsv_release(root, src_rsv, num_bytes); |
8c2a3ca2 | 732 | } |
16cdcec7 MX |
733 | |
734 | return ret; | |
735 | } | |
736 | ||
737 | static void btrfs_delayed_inode_release_metadata(struct btrfs_root *root, | |
738 | struct btrfs_delayed_node *node) | |
739 | { | |
740 | struct btrfs_block_rsv *rsv; | |
741 | ||
742 | if (!node->bytes_reserved) | |
743 | return; | |
744 | ||
6d668dda | 745 | rsv = &root->fs_info->delayed_block_rsv; |
8c2a3ca2 JB |
746 | trace_btrfs_space_reservation(root->fs_info, "delayed_inode", |
747 | node->inode_id, node->bytes_reserved, 0); | |
16cdcec7 MX |
748 | btrfs_block_rsv_release(root, rsv, |
749 | node->bytes_reserved); | |
750 | node->bytes_reserved = 0; | |
751 | } | |
752 | ||
753 | /* | |
754 | * This helper will insert some continuous items into the same leaf according | |
755 | * to the free space of the leaf. | |
756 | */ | |
757 | static int btrfs_batch_insert_items(struct btrfs_trans_handle *trans, | |
758 | struct btrfs_root *root, | |
759 | struct btrfs_path *path, | |
760 | struct btrfs_delayed_item *item) | |
761 | { | |
762 | struct btrfs_delayed_item *curr, *next; | |
763 | int free_space; | |
764 | int total_data_size = 0, total_size = 0; | |
765 | struct extent_buffer *leaf; | |
766 | char *data_ptr; | |
767 | struct btrfs_key *keys; | |
768 | u32 *data_size; | |
769 | struct list_head head; | |
770 | int slot; | |
771 | int nitems; | |
772 | int i; | |
773 | int ret = 0; | |
774 | ||
775 | BUG_ON(!path->nodes[0]); | |
776 | ||
777 | leaf = path->nodes[0]; | |
778 | free_space = btrfs_leaf_free_space(root, leaf); | |
779 | INIT_LIST_HEAD(&head); | |
780 | ||
781 | next = item; | |
17aca1c9 | 782 | nitems = 0; |
16cdcec7 MX |
783 | |
784 | /* | |
785 | * count the number of the continuous items that we can insert in batch | |
786 | */ | |
787 | while (total_size + next->data_len + sizeof(struct btrfs_item) <= | |
788 | free_space) { | |
789 | total_data_size += next->data_len; | |
790 | total_size += next->data_len + sizeof(struct btrfs_item); | |
791 | list_add_tail(&next->tree_list, &head); | |
792 | nitems++; | |
793 | ||
794 | curr = next; | |
795 | next = __btrfs_next_delayed_item(curr); | |
796 | if (!next) | |
797 | break; | |
798 | ||
799 | if (!btrfs_is_continuous_delayed_item(curr, next)) | |
800 | break; | |
801 | } | |
802 | ||
803 | if (!nitems) { | |
804 | ret = 0; | |
805 | goto out; | |
806 | } | |
807 | ||
808 | /* | |
809 | * we need allocate some memory space, but it might cause the task | |
810 | * to sleep, so we set all locked nodes in the path to blocking locks | |
811 | * first. | |
812 | */ | |
813 | btrfs_set_path_blocking(path); | |
814 | ||
815 | keys = kmalloc(sizeof(struct btrfs_key) * nitems, GFP_NOFS); | |
816 | if (!keys) { | |
817 | ret = -ENOMEM; | |
818 | goto out; | |
819 | } | |
820 | ||
821 | data_size = kmalloc(sizeof(u32) * nitems, GFP_NOFS); | |
822 | if (!data_size) { | |
823 | ret = -ENOMEM; | |
824 | goto error; | |
825 | } | |
826 | ||
827 | /* get keys of all the delayed items */ | |
828 | i = 0; | |
829 | list_for_each_entry(next, &head, tree_list) { | |
830 | keys[i] = next->key; | |
831 | data_size[i] = next->data_len; | |
832 | i++; | |
833 | } | |
834 | ||
835 | /* reset all the locked nodes in the patch to spinning locks. */ | |
bd681513 | 836 | btrfs_clear_path_blocking(path, NULL, 0); |
16cdcec7 MX |
837 | |
838 | /* insert the keys of the items */ | |
143bede5 JM |
839 | setup_items_for_insert(trans, root, path, keys, data_size, |
840 | total_data_size, total_size, nitems); | |
16cdcec7 MX |
841 | |
842 | /* insert the dir index items */ | |
843 | slot = path->slots[0]; | |
844 | list_for_each_entry_safe(curr, next, &head, tree_list) { | |
845 | data_ptr = btrfs_item_ptr(leaf, slot, char); | |
846 | write_extent_buffer(leaf, &curr->data, | |
847 | (unsigned long)data_ptr, | |
848 | curr->data_len); | |
849 | slot++; | |
850 | ||
851 | btrfs_delayed_item_release_metadata(root, curr); | |
852 | ||
853 | list_del(&curr->tree_list); | |
854 | btrfs_release_delayed_item(curr); | |
855 | } | |
856 | ||
857 | error: | |
858 | kfree(data_size); | |
859 | kfree(keys); | |
860 | out: | |
861 | return ret; | |
862 | } | |
863 | ||
864 | /* | |
865 | * This helper can just do simple insertion that needn't extend item for new | |
866 | * data, such as directory name index insertion, inode insertion. | |
867 | */ | |
868 | static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, | |
869 | struct btrfs_root *root, | |
870 | struct btrfs_path *path, | |
871 | struct btrfs_delayed_item *delayed_item) | |
872 | { | |
873 | struct extent_buffer *leaf; | |
874 | struct btrfs_item *item; | |
875 | char *ptr; | |
876 | int ret; | |
877 | ||
878 | ret = btrfs_insert_empty_item(trans, root, path, &delayed_item->key, | |
879 | delayed_item->data_len); | |
880 | if (ret < 0 && ret != -EEXIST) | |
881 | return ret; | |
882 | ||
883 | leaf = path->nodes[0]; | |
884 | ||
885 | item = btrfs_item_nr(leaf, path->slots[0]); | |
886 | ptr = btrfs_item_ptr(leaf, path->slots[0], char); | |
887 | ||
888 | write_extent_buffer(leaf, delayed_item->data, (unsigned long)ptr, | |
889 | delayed_item->data_len); | |
890 | btrfs_mark_buffer_dirty(leaf); | |
891 | ||
892 | btrfs_delayed_item_release_metadata(root, delayed_item); | |
893 | return 0; | |
894 | } | |
895 | ||
896 | /* | |
897 | * we insert an item first, then if there are some continuous items, we try | |
898 | * to insert those items into the same leaf. | |
899 | */ | |
900 | static int btrfs_insert_delayed_items(struct btrfs_trans_handle *trans, | |
901 | struct btrfs_path *path, | |
902 | struct btrfs_root *root, | |
903 | struct btrfs_delayed_node *node) | |
904 | { | |
905 | struct btrfs_delayed_item *curr, *prev; | |
906 | int ret = 0; | |
907 | ||
908 | do_again: | |
909 | mutex_lock(&node->mutex); | |
910 | curr = __btrfs_first_delayed_insertion_item(node); | |
911 | if (!curr) | |
912 | goto insert_end; | |
913 | ||
914 | ret = btrfs_insert_delayed_item(trans, root, path, curr); | |
915 | if (ret < 0) { | |
945d8962 | 916 | btrfs_release_path(path); |
16cdcec7 MX |
917 | goto insert_end; |
918 | } | |
919 | ||
920 | prev = curr; | |
921 | curr = __btrfs_next_delayed_item(prev); | |
922 | if (curr && btrfs_is_continuous_delayed_item(prev, curr)) { | |
923 | /* insert the continuous items into the same leaf */ | |
924 | path->slots[0]++; | |
925 | btrfs_batch_insert_items(trans, root, path, curr); | |
926 | } | |
927 | btrfs_release_delayed_item(prev); | |
928 | btrfs_mark_buffer_dirty(path->nodes[0]); | |
929 | ||
945d8962 | 930 | btrfs_release_path(path); |
16cdcec7 MX |
931 | mutex_unlock(&node->mutex); |
932 | goto do_again; | |
933 | ||
934 | insert_end: | |
935 | mutex_unlock(&node->mutex); | |
936 | return ret; | |
937 | } | |
938 | ||
939 | static int btrfs_batch_delete_items(struct btrfs_trans_handle *trans, | |
940 | struct btrfs_root *root, | |
941 | struct btrfs_path *path, | |
942 | struct btrfs_delayed_item *item) | |
943 | { | |
944 | struct btrfs_delayed_item *curr, *next; | |
945 | struct extent_buffer *leaf; | |
946 | struct btrfs_key key; | |
947 | struct list_head head; | |
948 | int nitems, i, last_item; | |
949 | int ret = 0; | |
950 | ||
951 | BUG_ON(!path->nodes[0]); | |
952 | ||
953 | leaf = path->nodes[0]; | |
954 | ||
955 | i = path->slots[0]; | |
956 | last_item = btrfs_header_nritems(leaf) - 1; | |
957 | if (i > last_item) | |
958 | return -ENOENT; /* FIXME: Is errno suitable? */ | |
959 | ||
960 | next = item; | |
961 | INIT_LIST_HEAD(&head); | |
962 | btrfs_item_key_to_cpu(leaf, &key, i); | |
963 | nitems = 0; | |
964 | /* | |
965 | * count the number of the dir index items that we can delete in batch | |
966 | */ | |
967 | while (btrfs_comp_cpu_keys(&next->key, &key) == 0) { | |
968 | list_add_tail(&next->tree_list, &head); | |
969 | nitems++; | |
970 | ||
971 | curr = next; | |
972 | next = __btrfs_next_delayed_item(curr); | |
973 | if (!next) | |
974 | break; | |
975 | ||
976 | if (!btrfs_is_continuous_delayed_item(curr, next)) | |
977 | break; | |
978 | ||
979 | i++; | |
980 | if (i > last_item) | |
981 | break; | |
982 | btrfs_item_key_to_cpu(leaf, &key, i); | |
983 | } | |
984 | ||
985 | if (!nitems) | |
986 | return 0; | |
987 | ||
988 | ret = btrfs_del_items(trans, root, path, path->slots[0], nitems); | |
989 | if (ret) | |
990 | goto out; | |
991 | ||
992 | list_for_each_entry_safe(curr, next, &head, tree_list) { | |
993 | btrfs_delayed_item_release_metadata(root, curr); | |
994 | list_del(&curr->tree_list); | |
995 | btrfs_release_delayed_item(curr); | |
996 | } | |
997 | ||
998 | out: | |
999 | return ret; | |
1000 | } | |
1001 | ||
1002 | static int btrfs_delete_delayed_items(struct btrfs_trans_handle *trans, | |
1003 | struct btrfs_path *path, | |
1004 | struct btrfs_root *root, | |
1005 | struct btrfs_delayed_node *node) | |
1006 | { | |
1007 | struct btrfs_delayed_item *curr, *prev; | |
1008 | int ret = 0; | |
1009 | ||
1010 | do_again: | |
1011 | mutex_lock(&node->mutex); | |
1012 | curr = __btrfs_first_delayed_deletion_item(node); | |
1013 | if (!curr) | |
1014 | goto delete_fail; | |
1015 | ||
1016 | ret = btrfs_search_slot(trans, root, &curr->key, path, -1, 1); | |
1017 | if (ret < 0) | |
1018 | goto delete_fail; | |
1019 | else if (ret > 0) { | |
1020 | /* | |
1021 | * can't find the item which the node points to, so this node | |
1022 | * is invalid, just drop it. | |
1023 | */ | |
1024 | prev = curr; | |
1025 | curr = __btrfs_next_delayed_item(prev); | |
1026 | btrfs_release_delayed_item(prev); | |
1027 | ret = 0; | |
945d8962 | 1028 | btrfs_release_path(path); |
16cdcec7 MX |
1029 | if (curr) |
1030 | goto do_again; | |
1031 | else | |
1032 | goto delete_fail; | |
1033 | } | |
1034 | ||
1035 | btrfs_batch_delete_items(trans, root, path, curr); | |
945d8962 | 1036 | btrfs_release_path(path); |
16cdcec7 MX |
1037 | mutex_unlock(&node->mutex); |
1038 | goto do_again; | |
1039 | ||
1040 | delete_fail: | |
945d8962 | 1041 | btrfs_release_path(path); |
16cdcec7 MX |
1042 | mutex_unlock(&node->mutex); |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) | |
1047 | { | |
1048 | struct btrfs_delayed_root *delayed_root; | |
1049 | ||
1050 | if (delayed_node && delayed_node->inode_dirty) { | |
1051 | BUG_ON(!delayed_node->root); | |
1052 | delayed_node->inode_dirty = 0; | |
1053 | delayed_node->count--; | |
1054 | ||
1055 | delayed_root = delayed_node->root->fs_info->delayed_root; | |
1056 | atomic_dec(&delayed_root->items); | |
1057 | if (atomic_read(&delayed_root->items) < | |
1058 | BTRFS_DELAYED_BACKGROUND && | |
1059 | waitqueue_active(&delayed_root->wait)) | |
1060 | wake_up(&delayed_root->wait); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, | |
1065 | struct btrfs_root *root, | |
1066 | struct btrfs_path *path, | |
1067 | struct btrfs_delayed_node *node) | |
1068 | { | |
1069 | struct btrfs_key key; | |
1070 | struct btrfs_inode_item *inode_item; | |
1071 | struct extent_buffer *leaf; | |
1072 | int ret; | |
1073 | ||
1074 | mutex_lock(&node->mutex); | |
1075 | if (!node->inode_dirty) { | |
1076 | mutex_unlock(&node->mutex); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | key.objectid = node->inode_id; | |
1081 | btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); | |
1082 | key.offset = 0; | |
1083 | ret = btrfs_lookup_inode(trans, root, path, &key, 1); | |
1084 | if (ret > 0) { | |
945d8962 | 1085 | btrfs_release_path(path); |
16cdcec7 MX |
1086 | mutex_unlock(&node->mutex); |
1087 | return -ENOENT; | |
1088 | } else if (ret < 0) { | |
1089 | mutex_unlock(&node->mutex); | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | btrfs_unlock_up_safe(path, 1); | |
1094 | leaf = path->nodes[0]; | |
1095 | inode_item = btrfs_item_ptr(leaf, path->slots[0], | |
1096 | struct btrfs_inode_item); | |
1097 | write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item, | |
1098 | sizeof(struct btrfs_inode_item)); | |
1099 | btrfs_mark_buffer_dirty(leaf); | |
945d8962 | 1100 | btrfs_release_path(path); |
16cdcec7 MX |
1101 | |
1102 | btrfs_delayed_inode_release_metadata(root, node); | |
1103 | btrfs_release_delayed_inode(node); | |
1104 | mutex_unlock(&node->mutex); | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | /* Called when committing the transaction. */ | |
1110 | int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, | |
1111 | struct btrfs_root *root) | |
1112 | { | |
1113 | struct btrfs_delayed_root *delayed_root; | |
1114 | struct btrfs_delayed_node *curr_node, *prev_node; | |
1115 | struct btrfs_path *path; | |
19fd2949 | 1116 | struct btrfs_block_rsv *block_rsv; |
16cdcec7 MX |
1117 | int ret = 0; |
1118 | ||
1119 | path = btrfs_alloc_path(); | |
1120 | if (!path) | |
1121 | return -ENOMEM; | |
1122 | path->leave_spinning = 1; | |
1123 | ||
19fd2949 | 1124 | block_rsv = trans->block_rsv; |
6d668dda | 1125 | trans->block_rsv = &root->fs_info->delayed_block_rsv; |
19fd2949 | 1126 | |
16cdcec7 MX |
1127 | delayed_root = btrfs_get_delayed_root(root); |
1128 | ||
1129 | curr_node = btrfs_first_delayed_node(delayed_root); | |
1130 | while (curr_node) { | |
1131 | root = curr_node->root; | |
1132 | ret = btrfs_insert_delayed_items(trans, path, root, | |
1133 | curr_node); | |
1134 | if (!ret) | |
1135 | ret = btrfs_delete_delayed_items(trans, path, root, | |
1136 | curr_node); | |
1137 | if (!ret) | |
1138 | ret = btrfs_update_delayed_inode(trans, root, path, | |
1139 | curr_node); | |
1140 | if (ret) { | |
1141 | btrfs_release_delayed_node(curr_node); | |
1142 | break; | |
1143 | } | |
1144 | ||
1145 | prev_node = curr_node; | |
1146 | curr_node = btrfs_next_delayed_node(curr_node); | |
1147 | btrfs_release_delayed_node(prev_node); | |
1148 | } | |
1149 | ||
1150 | btrfs_free_path(path); | |
19fd2949 | 1151 | trans->block_rsv = block_rsv; |
16cdcec7 MX |
1152 | return ret; |
1153 | } | |
1154 | ||
1155 | static int __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, | |
1156 | struct btrfs_delayed_node *node) | |
1157 | { | |
1158 | struct btrfs_path *path; | |
19fd2949 | 1159 | struct btrfs_block_rsv *block_rsv; |
16cdcec7 MX |
1160 | int ret; |
1161 | ||
1162 | path = btrfs_alloc_path(); | |
1163 | if (!path) | |
1164 | return -ENOMEM; | |
1165 | path->leave_spinning = 1; | |
1166 | ||
19fd2949 | 1167 | block_rsv = trans->block_rsv; |
6d668dda | 1168 | trans->block_rsv = &node->root->fs_info->delayed_block_rsv; |
19fd2949 | 1169 | |
16cdcec7 MX |
1170 | ret = btrfs_insert_delayed_items(trans, path, node->root, node); |
1171 | if (!ret) | |
1172 | ret = btrfs_delete_delayed_items(trans, path, node->root, node); | |
1173 | if (!ret) | |
1174 | ret = btrfs_update_delayed_inode(trans, node->root, path, node); | |
1175 | btrfs_free_path(path); | |
1176 | ||
19fd2949 | 1177 | trans->block_rsv = block_rsv; |
16cdcec7 MX |
1178 | return ret; |
1179 | } | |
1180 | ||
1181 | int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, | |
1182 | struct inode *inode) | |
1183 | { | |
1184 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); | |
1185 | int ret; | |
1186 | ||
1187 | if (!delayed_node) | |
1188 | return 0; | |
1189 | ||
1190 | mutex_lock(&delayed_node->mutex); | |
1191 | if (!delayed_node->count) { | |
1192 | mutex_unlock(&delayed_node->mutex); | |
1193 | btrfs_release_delayed_node(delayed_node); | |
1194 | return 0; | |
1195 | } | |
1196 | mutex_unlock(&delayed_node->mutex); | |
1197 | ||
1198 | ret = __btrfs_commit_inode_delayed_items(trans, delayed_node); | |
1199 | btrfs_release_delayed_node(delayed_node); | |
1200 | return ret; | |
1201 | } | |
1202 | ||
1203 | void btrfs_remove_delayed_node(struct inode *inode) | |
1204 | { | |
1205 | struct btrfs_delayed_node *delayed_node; | |
1206 | ||
1207 | delayed_node = ACCESS_ONCE(BTRFS_I(inode)->delayed_node); | |
1208 | if (!delayed_node) | |
1209 | return; | |
1210 | ||
1211 | BTRFS_I(inode)->delayed_node = NULL; | |
1212 | btrfs_release_delayed_node(delayed_node); | |
1213 | } | |
1214 | ||
1215 | struct btrfs_async_delayed_node { | |
1216 | struct btrfs_root *root; | |
1217 | struct btrfs_delayed_node *delayed_node; | |
1218 | struct btrfs_work work; | |
1219 | }; | |
1220 | ||
1221 | static void btrfs_async_run_delayed_node_done(struct btrfs_work *work) | |
1222 | { | |
1223 | struct btrfs_async_delayed_node *async_node; | |
1224 | struct btrfs_trans_handle *trans; | |
1225 | struct btrfs_path *path; | |
1226 | struct btrfs_delayed_node *delayed_node = NULL; | |
1227 | struct btrfs_root *root; | |
19fd2949 | 1228 | struct btrfs_block_rsv *block_rsv; |
16cdcec7 MX |
1229 | unsigned long nr = 0; |
1230 | int need_requeue = 0; | |
1231 | int ret; | |
1232 | ||
1233 | async_node = container_of(work, struct btrfs_async_delayed_node, work); | |
1234 | ||
1235 | path = btrfs_alloc_path(); | |
1236 | if (!path) | |
1237 | goto out; | |
1238 | path->leave_spinning = 1; | |
1239 | ||
1240 | delayed_node = async_node->delayed_node; | |
1241 | root = delayed_node->root; | |
1242 | ||
ff5714cc | 1243 | trans = btrfs_join_transaction(root); |
16cdcec7 MX |
1244 | if (IS_ERR(trans)) |
1245 | goto free_path; | |
1246 | ||
19fd2949 | 1247 | block_rsv = trans->block_rsv; |
6d668dda | 1248 | trans->block_rsv = &root->fs_info->delayed_block_rsv; |
19fd2949 | 1249 | |
16cdcec7 MX |
1250 | ret = btrfs_insert_delayed_items(trans, path, root, delayed_node); |
1251 | if (!ret) | |
1252 | ret = btrfs_delete_delayed_items(trans, path, root, | |
1253 | delayed_node); | |
1254 | ||
1255 | if (!ret) | |
1256 | btrfs_update_delayed_inode(trans, root, path, delayed_node); | |
1257 | ||
1258 | /* | |
1259 | * Maybe new delayed items have been inserted, so we need requeue | |
1260 | * the work. Besides that, we must dequeue the empty delayed nodes | |
1261 | * to avoid the race between delayed items balance and the worker. | |
1262 | * The race like this: | |
1263 | * Task1 Worker thread | |
1264 | * count == 0, needn't requeue | |
1265 | * also needn't insert the | |
1266 | * delayed node into prepare | |
1267 | * list again. | |
1268 | * add lots of delayed items | |
1269 | * queue the delayed node | |
1270 | * already in the list, | |
1271 | * and not in the prepare | |
1272 | * list, it means the delayed | |
1273 | * node is being dealt with | |
1274 | * by the worker. | |
1275 | * do delayed items balance | |
1276 | * the delayed node is being | |
1277 | * dealt with by the worker | |
1278 | * now, just wait. | |
1279 | * the worker goto idle. | |
1280 | * Task1 will sleep until the transaction is commited. | |
1281 | */ | |
1282 | mutex_lock(&delayed_node->mutex); | |
1283 | if (delayed_node->count) | |
1284 | need_requeue = 1; | |
1285 | else | |
1286 | btrfs_dequeue_delayed_node(root->fs_info->delayed_root, | |
1287 | delayed_node); | |
1288 | mutex_unlock(&delayed_node->mutex); | |
1289 | ||
1290 | nr = trans->blocks_used; | |
1291 | ||
19fd2949 | 1292 | trans->block_rsv = block_rsv; |
16cdcec7 MX |
1293 | btrfs_end_transaction_dmeta(trans, root); |
1294 | __btrfs_btree_balance_dirty(root, nr); | |
1295 | free_path: | |
1296 | btrfs_free_path(path); | |
1297 | out: | |
1298 | if (need_requeue) | |
1299 | btrfs_requeue_work(&async_node->work); | |
1300 | else { | |
1301 | btrfs_release_prepared_delayed_node(delayed_node); | |
1302 | kfree(async_node); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | static int btrfs_wq_run_delayed_node(struct btrfs_delayed_root *delayed_root, | |
1307 | struct btrfs_root *root, int all) | |
1308 | { | |
1309 | struct btrfs_async_delayed_node *async_node; | |
1310 | struct btrfs_delayed_node *curr; | |
1311 | int count = 0; | |
1312 | ||
1313 | again: | |
1314 | curr = btrfs_first_prepared_delayed_node(delayed_root); | |
1315 | if (!curr) | |
1316 | return 0; | |
1317 | ||
1318 | async_node = kmalloc(sizeof(*async_node), GFP_NOFS); | |
1319 | if (!async_node) { | |
1320 | btrfs_release_prepared_delayed_node(curr); | |
1321 | return -ENOMEM; | |
1322 | } | |
1323 | ||
1324 | async_node->root = root; | |
1325 | async_node->delayed_node = curr; | |
1326 | ||
1327 | async_node->work.func = btrfs_async_run_delayed_node_done; | |
1328 | async_node->work.flags = 0; | |
1329 | ||
1330 | btrfs_queue_worker(&root->fs_info->delayed_workers, &async_node->work); | |
1331 | count++; | |
1332 | ||
1333 | if (all || count < 4) | |
1334 | goto again; | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 | ||
e999376f CM |
1339 | void btrfs_assert_delayed_root_empty(struct btrfs_root *root) |
1340 | { | |
1341 | struct btrfs_delayed_root *delayed_root; | |
1342 | delayed_root = btrfs_get_delayed_root(root); | |
1343 | WARN_ON(btrfs_first_delayed_node(delayed_root)); | |
1344 | } | |
1345 | ||
16cdcec7 MX |
1346 | void btrfs_balance_delayed_items(struct btrfs_root *root) |
1347 | { | |
1348 | struct btrfs_delayed_root *delayed_root; | |
1349 | ||
1350 | delayed_root = btrfs_get_delayed_root(root); | |
1351 | ||
1352 | if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) | |
1353 | return; | |
1354 | ||
1355 | if (atomic_read(&delayed_root->items) >= BTRFS_DELAYED_WRITEBACK) { | |
1356 | int ret; | |
1357 | ret = btrfs_wq_run_delayed_node(delayed_root, root, 1); | |
1358 | if (ret) | |
1359 | return; | |
1360 | ||
1361 | wait_event_interruptible_timeout( | |
1362 | delayed_root->wait, | |
1363 | (atomic_read(&delayed_root->items) < | |
1364 | BTRFS_DELAYED_BACKGROUND), | |
1365 | HZ); | |
1366 | return; | |
1367 | } | |
1368 | ||
1369 | btrfs_wq_run_delayed_node(delayed_root, root, 0); | |
1370 | } | |
1371 | ||
1372 | int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, | |
1373 | struct btrfs_root *root, const char *name, | |
1374 | int name_len, struct inode *dir, | |
1375 | struct btrfs_disk_key *disk_key, u8 type, | |
1376 | u64 index) | |
1377 | { | |
1378 | struct btrfs_delayed_node *delayed_node; | |
1379 | struct btrfs_delayed_item *delayed_item; | |
1380 | struct btrfs_dir_item *dir_item; | |
1381 | int ret; | |
1382 | ||
1383 | delayed_node = btrfs_get_or_create_delayed_node(dir); | |
1384 | if (IS_ERR(delayed_node)) | |
1385 | return PTR_ERR(delayed_node); | |
1386 | ||
1387 | delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len); | |
1388 | if (!delayed_item) { | |
1389 | ret = -ENOMEM; | |
1390 | goto release_node; | |
1391 | } | |
1392 | ||
0d0ca30f | 1393 | delayed_item->key.objectid = btrfs_ino(dir); |
16cdcec7 MX |
1394 | btrfs_set_key_type(&delayed_item->key, BTRFS_DIR_INDEX_KEY); |
1395 | delayed_item->key.offset = index; | |
1396 | ||
1397 | dir_item = (struct btrfs_dir_item *)delayed_item->data; | |
1398 | dir_item->location = *disk_key; | |
1399 | dir_item->transid = cpu_to_le64(trans->transid); | |
1400 | dir_item->data_len = 0; | |
1401 | dir_item->name_len = cpu_to_le16(name_len); | |
1402 | dir_item->type = type; | |
1403 | memcpy((char *)(dir_item + 1), name, name_len); | |
1404 | ||
8c2a3ca2 JB |
1405 | ret = btrfs_delayed_item_reserve_metadata(trans, root, delayed_item); |
1406 | /* | |
1407 | * we have reserved enough space when we start a new transaction, | |
1408 | * so reserving metadata failure is impossible | |
1409 | */ | |
1410 | BUG_ON(ret); | |
1411 | ||
1412 | ||
16cdcec7 MX |
1413 | mutex_lock(&delayed_node->mutex); |
1414 | ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item); | |
1415 | if (unlikely(ret)) { | |
1416 | printk(KERN_ERR "err add delayed dir index item(name: %s) into " | |
1417 | "the insertion tree of the delayed node" | |
1418 | "(root id: %llu, inode id: %llu, errno: %d)\n", | |
1419 | name, | |
1420 | (unsigned long long)delayed_node->root->objectid, | |
1421 | (unsigned long long)delayed_node->inode_id, | |
1422 | ret); | |
1423 | BUG(); | |
1424 | } | |
1425 | mutex_unlock(&delayed_node->mutex); | |
1426 | ||
1427 | release_node: | |
1428 | btrfs_release_delayed_node(delayed_node); | |
1429 | return ret; | |
1430 | } | |
1431 | ||
1432 | static int btrfs_delete_delayed_insertion_item(struct btrfs_root *root, | |
1433 | struct btrfs_delayed_node *node, | |
1434 | struct btrfs_key *key) | |
1435 | { | |
1436 | struct btrfs_delayed_item *item; | |
1437 | ||
1438 | mutex_lock(&node->mutex); | |
1439 | item = __btrfs_lookup_delayed_insertion_item(node, key); | |
1440 | if (!item) { | |
1441 | mutex_unlock(&node->mutex); | |
1442 | return 1; | |
1443 | } | |
1444 | ||
1445 | btrfs_delayed_item_release_metadata(root, item); | |
1446 | btrfs_release_delayed_item(item); | |
1447 | mutex_unlock(&node->mutex); | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, | |
1452 | struct btrfs_root *root, struct inode *dir, | |
1453 | u64 index) | |
1454 | { | |
1455 | struct btrfs_delayed_node *node; | |
1456 | struct btrfs_delayed_item *item; | |
1457 | struct btrfs_key item_key; | |
1458 | int ret; | |
1459 | ||
1460 | node = btrfs_get_or_create_delayed_node(dir); | |
1461 | if (IS_ERR(node)) | |
1462 | return PTR_ERR(node); | |
1463 | ||
0d0ca30f | 1464 | item_key.objectid = btrfs_ino(dir); |
16cdcec7 MX |
1465 | btrfs_set_key_type(&item_key, BTRFS_DIR_INDEX_KEY); |
1466 | item_key.offset = index; | |
1467 | ||
1468 | ret = btrfs_delete_delayed_insertion_item(root, node, &item_key); | |
1469 | if (!ret) | |
1470 | goto end; | |
1471 | ||
1472 | item = btrfs_alloc_delayed_item(0); | |
1473 | if (!item) { | |
1474 | ret = -ENOMEM; | |
1475 | goto end; | |
1476 | } | |
1477 | ||
1478 | item->key = item_key; | |
1479 | ||
1480 | ret = btrfs_delayed_item_reserve_metadata(trans, root, item); | |
1481 | /* | |
1482 | * we have reserved enough space when we start a new transaction, | |
1483 | * so reserving metadata failure is impossible. | |
1484 | */ | |
1485 | BUG_ON(ret); | |
1486 | ||
1487 | mutex_lock(&node->mutex); | |
1488 | ret = __btrfs_add_delayed_deletion_item(node, item); | |
1489 | if (unlikely(ret)) { | |
1490 | printk(KERN_ERR "err add delayed dir index item(index: %llu) " | |
1491 | "into the deletion tree of the delayed node" | |
1492 | "(root id: %llu, inode id: %llu, errno: %d)\n", | |
1493 | (unsigned long long)index, | |
1494 | (unsigned long long)node->root->objectid, | |
1495 | (unsigned long long)node->inode_id, | |
1496 | ret); | |
1497 | BUG(); | |
1498 | } | |
1499 | mutex_unlock(&node->mutex); | |
1500 | end: | |
1501 | btrfs_release_delayed_node(node); | |
1502 | return ret; | |
1503 | } | |
1504 | ||
1505 | int btrfs_inode_delayed_dir_index_count(struct inode *inode) | |
1506 | { | |
2f7e33d4 | 1507 | struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); |
16cdcec7 MX |
1508 | |
1509 | if (!delayed_node) | |
1510 | return -ENOENT; | |
1511 | ||
1512 | /* | |
1513 | * Since we have held i_mutex of this directory, it is impossible that | |
1514 | * a new directory index is added into the delayed node and index_cnt | |
1515 | * is updated now. So we needn't lock the delayed node. | |
1516 | */ | |
2f7e33d4 MX |
1517 | if (!delayed_node->index_cnt) { |
1518 | btrfs_release_delayed_node(delayed_node); | |
16cdcec7 | 1519 | return -EINVAL; |
2f7e33d4 | 1520 | } |
16cdcec7 MX |
1521 | |
1522 | BTRFS_I(inode)->index_cnt = delayed_node->index_cnt; | |
2f7e33d4 MX |
1523 | btrfs_release_delayed_node(delayed_node); |
1524 | return 0; | |
16cdcec7 MX |
1525 | } |
1526 | ||
1527 | void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list, | |
1528 | struct list_head *del_list) | |
1529 | { | |
1530 | struct btrfs_delayed_node *delayed_node; | |
1531 | struct btrfs_delayed_item *item; | |
1532 | ||
1533 | delayed_node = btrfs_get_delayed_node(inode); | |
1534 | if (!delayed_node) | |
1535 | return; | |
1536 | ||
1537 | mutex_lock(&delayed_node->mutex); | |
1538 | item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1539 | while (item) { | |
1540 | atomic_inc(&item->refs); | |
1541 | list_add_tail(&item->readdir_list, ins_list); | |
1542 | item = __btrfs_next_delayed_item(item); | |
1543 | } | |
1544 | ||
1545 | item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1546 | while (item) { | |
1547 | atomic_inc(&item->refs); | |
1548 | list_add_tail(&item->readdir_list, del_list); | |
1549 | item = __btrfs_next_delayed_item(item); | |
1550 | } | |
1551 | mutex_unlock(&delayed_node->mutex); | |
1552 | /* | |
1553 | * This delayed node is still cached in the btrfs inode, so refs | |
1554 | * must be > 1 now, and we needn't check it is going to be freed | |
1555 | * or not. | |
1556 | * | |
1557 | * Besides that, this function is used to read dir, we do not | |
1558 | * insert/delete delayed items in this period. So we also needn't | |
1559 | * requeue or dequeue this delayed node. | |
1560 | */ | |
1561 | atomic_dec(&delayed_node->refs); | |
1562 | } | |
1563 | ||
1564 | void btrfs_put_delayed_items(struct list_head *ins_list, | |
1565 | struct list_head *del_list) | |
1566 | { | |
1567 | struct btrfs_delayed_item *curr, *next; | |
1568 | ||
1569 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1570 | list_del(&curr->readdir_list); | |
1571 | if (atomic_dec_and_test(&curr->refs)) | |
1572 | kfree(curr); | |
1573 | } | |
1574 | ||
1575 | list_for_each_entry_safe(curr, next, del_list, readdir_list) { | |
1576 | list_del(&curr->readdir_list); | |
1577 | if (atomic_dec_and_test(&curr->refs)) | |
1578 | kfree(curr); | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | int btrfs_should_delete_dir_index(struct list_head *del_list, | |
1583 | u64 index) | |
1584 | { | |
1585 | struct btrfs_delayed_item *curr, *next; | |
1586 | int ret; | |
1587 | ||
1588 | if (list_empty(del_list)) | |
1589 | return 0; | |
1590 | ||
1591 | list_for_each_entry_safe(curr, next, del_list, readdir_list) { | |
1592 | if (curr->key.offset > index) | |
1593 | break; | |
1594 | ||
1595 | list_del(&curr->readdir_list); | |
1596 | ret = (curr->key.offset == index); | |
1597 | ||
1598 | if (atomic_dec_and_test(&curr->refs)) | |
1599 | kfree(curr); | |
1600 | ||
1601 | if (ret) | |
1602 | return 1; | |
1603 | else | |
1604 | continue; | |
1605 | } | |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree | |
1611 | * | |
1612 | */ | |
1613 | int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent, | |
1614 | filldir_t filldir, | |
1615 | struct list_head *ins_list) | |
1616 | { | |
1617 | struct btrfs_dir_item *di; | |
1618 | struct btrfs_delayed_item *curr, *next; | |
1619 | struct btrfs_key location; | |
1620 | char *name; | |
1621 | int name_len; | |
1622 | int over = 0; | |
1623 | unsigned char d_type; | |
1624 | ||
1625 | if (list_empty(ins_list)) | |
1626 | return 0; | |
1627 | ||
1628 | /* | |
1629 | * Changing the data of the delayed item is impossible. So | |
1630 | * we needn't lock them. And we have held i_mutex of the | |
1631 | * directory, nobody can delete any directory indexes now. | |
1632 | */ | |
1633 | list_for_each_entry_safe(curr, next, ins_list, readdir_list) { | |
1634 | list_del(&curr->readdir_list); | |
1635 | ||
1636 | if (curr->key.offset < filp->f_pos) { | |
1637 | if (atomic_dec_and_test(&curr->refs)) | |
1638 | kfree(curr); | |
1639 | continue; | |
1640 | } | |
1641 | ||
1642 | filp->f_pos = curr->key.offset; | |
1643 | ||
1644 | di = (struct btrfs_dir_item *)curr->data; | |
1645 | name = (char *)(di + 1); | |
1646 | name_len = le16_to_cpu(di->name_len); | |
1647 | ||
1648 | d_type = btrfs_filetype_table[di->type]; | |
1649 | btrfs_disk_key_to_cpu(&location, &di->location); | |
1650 | ||
1651 | over = filldir(dirent, name, name_len, curr->key.offset, | |
1652 | location.objectid, d_type); | |
1653 | ||
1654 | if (atomic_dec_and_test(&curr->refs)) | |
1655 | kfree(curr); | |
1656 | ||
1657 | if (over) | |
1658 | return 1; | |
1659 | } | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, | |
1664 | generation, 64); | |
1665 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, | |
1666 | sequence, 64); | |
1667 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, | |
1668 | transid, 64); | |
1669 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); | |
1670 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, | |
1671 | nbytes, 64); | |
1672 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, | |
1673 | block_group, 64); | |
1674 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1675 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); | |
1676 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); | |
1677 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); | |
1678 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); | |
1679 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); | |
1680 | ||
1681 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); | |
1682 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); | |
1683 | ||
1684 | static void fill_stack_inode_item(struct btrfs_trans_handle *trans, | |
1685 | struct btrfs_inode_item *inode_item, | |
1686 | struct inode *inode) | |
1687 | { | |
1688 | btrfs_set_stack_inode_uid(inode_item, inode->i_uid); | |
1689 | btrfs_set_stack_inode_gid(inode_item, inode->i_gid); | |
1690 | btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size); | |
1691 | btrfs_set_stack_inode_mode(inode_item, inode->i_mode); | |
1692 | btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink); | |
1693 | btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode)); | |
1694 | btrfs_set_stack_inode_generation(inode_item, | |
1695 | BTRFS_I(inode)->generation); | |
1696 | btrfs_set_stack_inode_sequence(inode_item, BTRFS_I(inode)->sequence); | |
1697 | btrfs_set_stack_inode_transid(inode_item, trans->transid); | |
1698 | btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev); | |
1699 | btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags); | |
ff5714cc | 1700 | btrfs_set_stack_inode_block_group(inode_item, 0); |
16cdcec7 MX |
1701 | |
1702 | btrfs_set_stack_timespec_sec(btrfs_inode_atime(inode_item), | |
1703 | inode->i_atime.tv_sec); | |
1704 | btrfs_set_stack_timespec_nsec(btrfs_inode_atime(inode_item), | |
1705 | inode->i_atime.tv_nsec); | |
1706 | ||
1707 | btrfs_set_stack_timespec_sec(btrfs_inode_mtime(inode_item), | |
1708 | inode->i_mtime.tv_sec); | |
1709 | btrfs_set_stack_timespec_nsec(btrfs_inode_mtime(inode_item), | |
1710 | inode->i_mtime.tv_nsec); | |
1711 | ||
1712 | btrfs_set_stack_timespec_sec(btrfs_inode_ctime(inode_item), | |
1713 | inode->i_ctime.tv_sec); | |
1714 | btrfs_set_stack_timespec_nsec(btrfs_inode_ctime(inode_item), | |
1715 | inode->i_ctime.tv_nsec); | |
1716 | } | |
1717 | ||
2f7e33d4 MX |
1718 | int btrfs_fill_inode(struct inode *inode, u32 *rdev) |
1719 | { | |
1720 | struct btrfs_delayed_node *delayed_node; | |
1721 | struct btrfs_inode_item *inode_item; | |
1722 | struct btrfs_timespec *tspec; | |
1723 | ||
1724 | delayed_node = btrfs_get_delayed_node(inode); | |
1725 | if (!delayed_node) | |
1726 | return -ENOENT; | |
1727 | ||
1728 | mutex_lock(&delayed_node->mutex); | |
1729 | if (!delayed_node->inode_dirty) { | |
1730 | mutex_unlock(&delayed_node->mutex); | |
1731 | btrfs_release_delayed_node(delayed_node); | |
1732 | return -ENOENT; | |
1733 | } | |
1734 | ||
1735 | inode_item = &delayed_node->inode_item; | |
1736 | ||
1737 | inode->i_uid = btrfs_stack_inode_uid(inode_item); | |
1738 | inode->i_gid = btrfs_stack_inode_gid(inode_item); | |
1739 | btrfs_i_size_write(inode, btrfs_stack_inode_size(inode_item)); | |
1740 | inode->i_mode = btrfs_stack_inode_mode(inode_item); | |
bfe86848 | 1741 | set_nlink(inode, btrfs_stack_inode_nlink(inode_item)); |
2f7e33d4 MX |
1742 | inode_set_bytes(inode, btrfs_stack_inode_nbytes(inode_item)); |
1743 | BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item); | |
1744 | BTRFS_I(inode)->sequence = btrfs_stack_inode_sequence(inode_item); | |
1745 | inode->i_rdev = 0; | |
1746 | *rdev = btrfs_stack_inode_rdev(inode_item); | |
1747 | BTRFS_I(inode)->flags = btrfs_stack_inode_flags(inode_item); | |
1748 | ||
1749 | tspec = btrfs_inode_atime(inode_item); | |
1750 | inode->i_atime.tv_sec = btrfs_stack_timespec_sec(tspec); | |
1751 | inode->i_atime.tv_nsec = btrfs_stack_timespec_nsec(tspec); | |
1752 | ||
1753 | tspec = btrfs_inode_mtime(inode_item); | |
1754 | inode->i_mtime.tv_sec = btrfs_stack_timespec_sec(tspec); | |
1755 | inode->i_mtime.tv_nsec = btrfs_stack_timespec_nsec(tspec); | |
1756 | ||
1757 | tspec = btrfs_inode_ctime(inode_item); | |
1758 | inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(tspec); | |
1759 | inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(tspec); | |
1760 | ||
1761 | inode->i_generation = BTRFS_I(inode)->generation; | |
1762 | BTRFS_I(inode)->index_cnt = (u64)-1; | |
1763 | ||
1764 | mutex_unlock(&delayed_node->mutex); | |
1765 | btrfs_release_delayed_node(delayed_node); | |
1766 | return 0; | |
1767 | } | |
1768 | ||
16cdcec7 MX |
1769 | int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, |
1770 | struct btrfs_root *root, struct inode *inode) | |
1771 | { | |
1772 | struct btrfs_delayed_node *delayed_node; | |
aa0467d8 | 1773 | int ret = 0; |
16cdcec7 MX |
1774 | |
1775 | delayed_node = btrfs_get_or_create_delayed_node(inode); | |
1776 | if (IS_ERR(delayed_node)) | |
1777 | return PTR_ERR(delayed_node); | |
1778 | ||
1779 | mutex_lock(&delayed_node->mutex); | |
1780 | if (delayed_node->inode_dirty) { | |
1781 | fill_stack_inode_item(trans, &delayed_node->inode_item, inode); | |
1782 | goto release_node; | |
1783 | } | |
1784 | ||
7fd2ae21 JB |
1785 | ret = btrfs_delayed_inode_reserve_metadata(trans, root, inode, |
1786 | delayed_node); | |
c06a0e12 JB |
1787 | if (ret) |
1788 | goto release_node; | |
16cdcec7 MX |
1789 | |
1790 | fill_stack_inode_item(trans, &delayed_node->inode_item, inode); | |
1791 | delayed_node->inode_dirty = 1; | |
1792 | delayed_node->count++; | |
1793 | atomic_inc(&root->fs_info->delayed_root->items); | |
1794 | release_node: | |
1795 | mutex_unlock(&delayed_node->mutex); | |
1796 | btrfs_release_delayed_node(delayed_node); | |
1797 | return ret; | |
1798 | } | |
1799 | ||
1800 | static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) | |
1801 | { | |
1802 | struct btrfs_root *root = delayed_node->root; | |
1803 | struct btrfs_delayed_item *curr_item, *prev_item; | |
1804 | ||
1805 | mutex_lock(&delayed_node->mutex); | |
1806 | curr_item = __btrfs_first_delayed_insertion_item(delayed_node); | |
1807 | while (curr_item) { | |
1808 | btrfs_delayed_item_release_metadata(root, curr_item); | |
1809 | prev_item = curr_item; | |
1810 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1811 | btrfs_release_delayed_item(prev_item); | |
1812 | } | |
1813 | ||
1814 | curr_item = __btrfs_first_delayed_deletion_item(delayed_node); | |
1815 | while (curr_item) { | |
1816 | btrfs_delayed_item_release_metadata(root, curr_item); | |
1817 | prev_item = curr_item; | |
1818 | curr_item = __btrfs_next_delayed_item(prev_item); | |
1819 | btrfs_release_delayed_item(prev_item); | |
1820 | } | |
1821 | ||
1822 | if (delayed_node->inode_dirty) { | |
1823 | btrfs_delayed_inode_release_metadata(root, delayed_node); | |
1824 | btrfs_release_delayed_inode(delayed_node); | |
1825 | } | |
1826 | mutex_unlock(&delayed_node->mutex); | |
1827 | } | |
1828 | ||
1829 | void btrfs_kill_delayed_inode_items(struct inode *inode) | |
1830 | { | |
1831 | struct btrfs_delayed_node *delayed_node; | |
1832 | ||
1833 | delayed_node = btrfs_get_delayed_node(inode); | |
1834 | if (!delayed_node) | |
1835 | return; | |
1836 | ||
1837 | __btrfs_kill_delayed_node(delayed_node); | |
1838 | btrfs_release_delayed_node(delayed_node); | |
1839 | } | |
1840 | ||
1841 | void btrfs_kill_all_delayed_nodes(struct btrfs_root *root) | |
1842 | { | |
1843 | u64 inode_id = 0; | |
1844 | struct btrfs_delayed_node *delayed_nodes[8]; | |
1845 | int i, n; | |
1846 | ||
1847 | while (1) { | |
1848 | spin_lock(&root->inode_lock); | |
1849 | n = radix_tree_gang_lookup(&root->delayed_nodes_tree, | |
1850 | (void **)delayed_nodes, inode_id, | |
1851 | ARRAY_SIZE(delayed_nodes)); | |
1852 | if (!n) { | |
1853 | spin_unlock(&root->inode_lock); | |
1854 | break; | |
1855 | } | |
1856 | ||
1857 | inode_id = delayed_nodes[n - 1]->inode_id + 1; | |
1858 | ||
1859 | for (i = 0; i < n; i++) | |
1860 | atomic_inc(&delayed_nodes[i]->refs); | |
1861 | spin_unlock(&root->inode_lock); | |
1862 | ||
1863 | for (i = 0; i < n; i++) { | |
1864 | __btrfs_kill_delayed_node(delayed_nodes[i]); | |
1865 | btrfs_release_delayed_node(delayed_nodes[i]); | |
1866 | } | |
1867 | } | |
1868 | } |