2 * Copyright (C) 2011 Fujitsu. All rights reserved.
3 * Written by Miao Xie <miaox@cn.fujitsu.com>
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.
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.
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.
20 #include <linux/slab.h>
21 #include "delayed-inode.h"
23 #include "transaction.h"
25 #define BTRFS_DELAYED_WRITEBACK 400
26 #define BTRFS_DELAYED_BACKGROUND 100
28 static struct kmem_cache *delayed_node_cache;
30 int __init btrfs_delayed_inode_init(void)
32 delayed_node_cache = kmem_cache_create("btrfs_delayed_node",
33 sizeof(struct btrfs_delayed_node),
35 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
37 if (!delayed_node_cache)
42 void btrfs_delayed_inode_exit(void)
44 if (delayed_node_cache)
45 kmem_cache_destroy(delayed_node_cache);
48 static inline void btrfs_init_delayed_node(
49 struct btrfs_delayed_node *delayed_node,
50 struct btrfs_root *root, u64 inode_id)
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 memset(&delayed_node->inode_item, 0, sizeof(delayed_node->inode_item));
68 static inline int btrfs_is_continuous_delayed_item(
69 struct btrfs_delayed_item *item1,
70 struct btrfs_delayed_item *item2)
72 if (item1->key.type == BTRFS_DIR_INDEX_KEY &&
73 item1->key.objectid == item2->key.objectid &&
74 item1->key.type == item2->key.type &&
75 item1->key.offset + 1 == item2->key.offset)
80 static inline struct btrfs_delayed_root *btrfs_get_delayed_root(
81 struct btrfs_root *root)
83 return root->fs_info->delayed_root;
86 static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode)
88 struct btrfs_inode *btrfs_inode = BTRFS_I(inode);
89 struct btrfs_root *root = btrfs_inode->root;
90 u64 ino = btrfs_ino(inode);
91 struct btrfs_delayed_node *node;
93 node = ACCESS_ONCE(btrfs_inode->delayed_node);
95 atomic_inc(&node->refs);
99 spin_lock(&root->inode_lock);
100 node = radix_tree_lookup(&root->delayed_nodes_tree, ino);
102 if (btrfs_inode->delayed_node) {
103 atomic_inc(&node->refs); /* can be accessed */
104 BUG_ON(btrfs_inode->delayed_node != node);
105 spin_unlock(&root->inode_lock);
108 btrfs_inode->delayed_node = node;
109 atomic_inc(&node->refs); /* can be accessed */
110 atomic_inc(&node->refs); /* cached in the inode */
111 spin_unlock(&root->inode_lock);
114 spin_unlock(&root->inode_lock);
119 /* Will return either the node or PTR_ERR(-ENOMEM) */
120 static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node(
123 struct btrfs_delayed_node *node;
124 struct btrfs_inode *btrfs_inode = BTRFS_I(inode);
125 struct btrfs_root *root = btrfs_inode->root;
126 u64 ino = btrfs_ino(inode);
130 node = btrfs_get_delayed_node(inode);
134 node = kmem_cache_alloc(delayed_node_cache, GFP_NOFS);
136 return ERR_PTR(-ENOMEM);
137 btrfs_init_delayed_node(node, root, ino);
139 atomic_inc(&node->refs); /* cached in the btrfs inode */
140 atomic_inc(&node->refs); /* can be accessed */
142 ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM);
144 kmem_cache_free(delayed_node_cache, node);
148 spin_lock(&root->inode_lock);
149 ret = radix_tree_insert(&root->delayed_nodes_tree, ino, node);
150 if (ret == -EEXIST) {
151 kmem_cache_free(delayed_node_cache, node);
152 spin_unlock(&root->inode_lock);
153 radix_tree_preload_end();
156 btrfs_inode->delayed_node = node;
157 spin_unlock(&root->inode_lock);
158 radix_tree_preload_end();
164 * Call it when holding delayed_node->mutex
166 * If mod = 1, add this node into the prepared list.
168 static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root,
169 struct btrfs_delayed_node *node,
172 spin_lock(&root->lock);
174 if (!list_empty(&node->p_list))
175 list_move_tail(&node->p_list, &root->prepare_list);
177 list_add_tail(&node->p_list, &root->prepare_list);
179 list_add_tail(&node->n_list, &root->node_list);
180 list_add_tail(&node->p_list, &root->prepare_list);
181 atomic_inc(&node->refs); /* inserted into list */
185 spin_unlock(&root->lock);
188 /* Call it when holding delayed_node->mutex */
189 static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root,
190 struct btrfs_delayed_node *node)
192 spin_lock(&root->lock);
195 atomic_dec(&node->refs); /* not in the list */
196 list_del_init(&node->n_list);
197 if (!list_empty(&node->p_list))
198 list_del_init(&node->p_list);
201 spin_unlock(&root->lock);
204 struct btrfs_delayed_node *btrfs_first_delayed_node(
205 struct btrfs_delayed_root *delayed_root)
208 struct btrfs_delayed_node *node = NULL;
210 spin_lock(&delayed_root->lock);
211 if (list_empty(&delayed_root->node_list))
214 p = delayed_root->node_list.next;
215 node = list_entry(p, struct btrfs_delayed_node, n_list);
216 atomic_inc(&node->refs);
218 spin_unlock(&delayed_root->lock);
223 struct btrfs_delayed_node *btrfs_next_delayed_node(
224 struct btrfs_delayed_node *node)
226 struct btrfs_delayed_root *delayed_root;
228 struct btrfs_delayed_node *next = NULL;
230 delayed_root = node->root->fs_info->delayed_root;
231 spin_lock(&delayed_root->lock);
232 if (!node->in_list) { /* not in the list */
233 if (list_empty(&delayed_root->node_list))
235 p = delayed_root->node_list.next;
236 } else if (list_is_last(&node->n_list, &delayed_root->node_list))
239 p = node->n_list.next;
241 next = list_entry(p, struct btrfs_delayed_node, n_list);
242 atomic_inc(&next->refs);
244 spin_unlock(&delayed_root->lock);
249 static void __btrfs_release_delayed_node(
250 struct btrfs_delayed_node *delayed_node,
253 struct btrfs_delayed_root *delayed_root;
258 delayed_root = delayed_node->root->fs_info->delayed_root;
260 mutex_lock(&delayed_node->mutex);
261 if (delayed_node->count)
262 btrfs_queue_delayed_node(delayed_root, delayed_node, mod);
264 btrfs_dequeue_delayed_node(delayed_root, delayed_node);
265 mutex_unlock(&delayed_node->mutex);
267 if (atomic_dec_and_test(&delayed_node->refs)) {
268 struct btrfs_root *root = delayed_node->root;
269 spin_lock(&root->inode_lock);
270 if (atomic_read(&delayed_node->refs) == 0) {
271 radix_tree_delete(&root->delayed_nodes_tree,
272 delayed_node->inode_id);
273 kmem_cache_free(delayed_node_cache, delayed_node);
275 spin_unlock(&root->inode_lock);
279 static inline void btrfs_release_delayed_node(struct btrfs_delayed_node *node)
281 __btrfs_release_delayed_node(node, 0);
284 struct btrfs_delayed_node *btrfs_first_prepared_delayed_node(
285 struct btrfs_delayed_root *delayed_root)
288 struct btrfs_delayed_node *node = NULL;
290 spin_lock(&delayed_root->lock);
291 if (list_empty(&delayed_root->prepare_list))
294 p = delayed_root->prepare_list.next;
296 node = list_entry(p, struct btrfs_delayed_node, p_list);
297 atomic_inc(&node->refs);
299 spin_unlock(&delayed_root->lock);
304 static inline void btrfs_release_prepared_delayed_node(
305 struct btrfs_delayed_node *node)
307 __btrfs_release_delayed_node(node, 1);
310 struct btrfs_delayed_item *btrfs_alloc_delayed_item(u32 data_len)
312 struct btrfs_delayed_item *item;
313 item = kmalloc(sizeof(*item) + data_len, GFP_NOFS);
315 item->data_len = data_len;
316 item->ins_or_del = 0;
317 item->bytes_reserved = 0;
318 item->delayed_node = NULL;
319 atomic_set(&item->refs, 1);
325 * __btrfs_lookup_delayed_item - look up the delayed item by key
326 * @delayed_node: pointer to the delayed node
327 * @key: the key to look up
328 * @prev: used to store the prev item if the right item isn't found
329 * @next: used to store the next item if the right item isn't found
331 * Note: if we don't find the right item, we will return the prev item and
334 static struct btrfs_delayed_item *__btrfs_lookup_delayed_item(
335 struct rb_root *root,
336 struct btrfs_key *key,
337 struct btrfs_delayed_item **prev,
338 struct btrfs_delayed_item **next)
340 struct rb_node *node, *prev_node = NULL;
341 struct btrfs_delayed_item *delayed_item = NULL;
344 node = root->rb_node;
347 delayed_item = rb_entry(node, struct btrfs_delayed_item,
350 ret = btrfs_comp_cpu_keys(&delayed_item->key, key);
352 node = node->rb_right;
354 node = node->rb_left;
363 *prev = delayed_item;
364 else if ((node = rb_prev(prev_node)) != NULL) {
365 *prev = rb_entry(node, struct btrfs_delayed_item,
375 *next = delayed_item;
376 else if ((node = rb_next(prev_node)) != NULL) {
377 *next = rb_entry(node, struct btrfs_delayed_item,
385 struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item(
386 struct btrfs_delayed_node *delayed_node,
387 struct btrfs_key *key)
389 struct btrfs_delayed_item *item;
391 item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
396 struct btrfs_delayed_item *__btrfs_lookup_delayed_deletion_item(
397 struct btrfs_delayed_node *delayed_node,
398 struct btrfs_key *key)
400 struct btrfs_delayed_item *item;
402 item = __btrfs_lookup_delayed_item(&delayed_node->del_root, key,
407 struct btrfs_delayed_item *__btrfs_search_delayed_insertion_item(
408 struct btrfs_delayed_node *delayed_node,
409 struct btrfs_key *key)
411 struct btrfs_delayed_item *item, *next;
413 item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
421 struct btrfs_delayed_item *__btrfs_search_delayed_deletion_item(
422 struct btrfs_delayed_node *delayed_node,
423 struct btrfs_key *key)
425 struct btrfs_delayed_item *item, *next;
427 item = __btrfs_lookup_delayed_item(&delayed_node->del_root, key,
435 static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node,
436 struct btrfs_delayed_item *ins,
439 struct rb_node **p, *node;
440 struct rb_node *parent_node = NULL;
441 struct rb_root *root;
442 struct btrfs_delayed_item *item;
445 if (action == BTRFS_DELAYED_INSERTION_ITEM)
446 root = &delayed_node->ins_root;
447 else if (action == BTRFS_DELAYED_DELETION_ITEM)
448 root = &delayed_node->del_root;
452 node = &ins->rb_node;
456 item = rb_entry(parent_node, struct btrfs_delayed_item,
459 cmp = btrfs_comp_cpu_keys(&item->key, &ins->key);
468 rb_link_node(node, parent_node, p);
469 rb_insert_color(node, root);
470 ins->delayed_node = delayed_node;
471 ins->ins_or_del = action;
473 if (ins->key.type == BTRFS_DIR_INDEX_KEY &&
474 action == BTRFS_DELAYED_INSERTION_ITEM &&
475 ins->key.offset >= delayed_node->index_cnt)
476 delayed_node->index_cnt = ins->key.offset + 1;
478 delayed_node->count++;
479 atomic_inc(&delayed_node->root->fs_info->delayed_root->items);
483 static int __btrfs_add_delayed_insertion_item(struct btrfs_delayed_node *node,
484 struct btrfs_delayed_item *item)
486 return __btrfs_add_delayed_item(node, item,
487 BTRFS_DELAYED_INSERTION_ITEM);
490 static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node,
491 struct btrfs_delayed_item *item)
493 return __btrfs_add_delayed_item(node, item,
494 BTRFS_DELAYED_DELETION_ITEM);
497 static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item)
499 struct rb_root *root;
500 struct btrfs_delayed_root *delayed_root;
502 delayed_root = delayed_item->delayed_node->root->fs_info->delayed_root;
504 BUG_ON(!delayed_root);
505 BUG_ON(delayed_item->ins_or_del != BTRFS_DELAYED_DELETION_ITEM &&
506 delayed_item->ins_or_del != BTRFS_DELAYED_INSERTION_ITEM);
508 if (delayed_item->ins_or_del == BTRFS_DELAYED_INSERTION_ITEM)
509 root = &delayed_item->delayed_node->ins_root;
511 root = &delayed_item->delayed_node->del_root;
513 rb_erase(&delayed_item->rb_node, root);
514 delayed_item->delayed_node->count--;
515 if (atomic_dec_return(&delayed_root->items) <
516 BTRFS_DELAYED_BACKGROUND &&
517 waitqueue_active(&delayed_root->wait))
518 wake_up(&delayed_root->wait);
521 static void btrfs_release_delayed_item(struct btrfs_delayed_item *item)
524 __btrfs_remove_delayed_item(item);
525 if (atomic_dec_and_test(&item->refs))
530 struct btrfs_delayed_item *__btrfs_first_delayed_insertion_item(
531 struct btrfs_delayed_node *delayed_node)
534 struct btrfs_delayed_item *item = NULL;
536 p = rb_first(&delayed_node->ins_root);
538 item = rb_entry(p, struct btrfs_delayed_item, rb_node);
543 struct btrfs_delayed_item *__btrfs_first_delayed_deletion_item(
544 struct btrfs_delayed_node *delayed_node)
547 struct btrfs_delayed_item *item = NULL;
549 p = rb_first(&delayed_node->del_root);
551 item = rb_entry(p, struct btrfs_delayed_item, rb_node);
556 struct btrfs_delayed_item *__btrfs_next_delayed_item(
557 struct btrfs_delayed_item *item)
560 struct btrfs_delayed_item *next = NULL;
562 p = rb_next(&item->rb_node);
564 next = rb_entry(p, struct btrfs_delayed_item, rb_node);
569 static inline struct btrfs_root *btrfs_get_fs_root(struct btrfs_root *root,
572 struct btrfs_key root_key;
574 if (root->objectid == root_id)
577 root_key.objectid = root_id;
578 root_key.type = BTRFS_ROOT_ITEM_KEY;
579 root_key.offset = (u64)-1;
580 return btrfs_read_fs_root_no_name(root->fs_info, &root_key);
583 static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans,
584 struct btrfs_root *root,
585 struct btrfs_delayed_item *item)
587 struct btrfs_block_rsv *src_rsv;
588 struct btrfs_block_rsv *dst_rsv;
592 if (!trans->bytes_reserved)
595 src_rsv = trans->block_rsv;
596 dst_rsv = &root->fs_info->delayed_block_rsv;
598 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
599 ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
601 trace_btrfs_space_reservation(root->fs_info, "delayed_item",
604 item->bytes_reserved = num_bytes;
610 static void btrfs_delayed_item_release_metadata(struct btrfs_root *root,
611 struct btrfs_delayed_item *item)
613 struct btrfs_block_rsv *rsv;
615 if (!item->bytes_reserved)
618 rsv = &root->fs_info->delayed_block_rsv;
619 trace_btrfs_space_reservation(root->fs_info, "delayed_item",
620 item->key.objectid, item->bytes_reserved,
622 btrfs_block_rsv_release(root, rsv,
623 item->bytes_reserved);
626 static int btrfs_delayed_inode_reserve_metadata(
627 struct btrfs_trans_handle *trans,
628 struct btrfs_root *root,
630 struct btrfs_delayed_node *node)
632 struct btrfs_block_rsv *src_rsv;
633 struct btrfs_block_rsv *dst_rsv;
636 bool release = false;
638 src_rsv = trans->block_rsv;
639 dst_rsv = &root->fs_info->delayed_block_rsv;
641 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
644 * btrfs_dirty_inode will update the inode under btrfs_join_transaction
645 * which doesn't reserve space for speed. This is a problem since we
646 * still need to reserve space for this update, so try to reserve the
649 * Now if src_rsv == delalloc_block_rsv we'll let it just steal since
650 * we're accounted for.
652 if (!src_rsv || (!trans->bytes_reserved &&
653 src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) {
654 ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes,
655 BTRFS_RESERVE_NO_FLUSH);
657 * Since we're under a transaction reserve_metadata_bytes could
658 * try to commit the transaction which will make it return
659 * EAGAIN to make us stop the transaction we have, so return
660 * ENOSPC instead so that btrfs_dirty_inode knows what to do.
665 node->bytes_reserved = num_bytes;
666 trace_btrfs_space_reservation(root->fs_info,
672 } else if (src_rsv->type == BTRFS_BLOCK_RSV_DELALLOC) {
673 spin_lock(&BTRFS_I(inode)->lock);
674 if (test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED,
675 &BTRFS_I(inode)->runtime_flags)) {
676 spin_unlock(&BTRFS_I(inode)->lock);
680 spin_unlock(&BTRFS_I(inode)->lock);
682 /* Ok we didn't have space pre-reserved. This shouldn't happen
683 * too often but it can happen if we do delalloc to an existing
684 * inode which gets dirtied because of the time update, and then
685 * isn't touched again until after the transaction commits and
686 * then we try to write out the data. First try to be nice and
687 * reserve something strictly for us. If not be a pain and try
688 * to steal from the delalloc block rsv.
690 ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes,
691 BTRFS_RESERVE_NO_FLUSH);
695 ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
700 * Ok this is a problem, let's just steal from the global rsv
701 * since this really shouldn't happen that often.
704 ret = btrfs_block_rsv_migrate(&root->fs_info->global_block_rsv,
710 ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
714 * Migrate only takes a reservation, it doesn't touch the size of the
715 * block_rsv. This is to simplify people who don't normally have things
716 * migrated from their block rsv. If they go to release their
717 * reservation, that will decrease the size as well, so if migrate
718 * reduced size we'd end up with a negative size. But for the
719 * delalloc_meta_reserved stuff we will only know to drop 1 reservation,
720 * but we could in fact do this reserve/migrate dance several times
721 * between the time we did the original reservation and we'd clean it
722 * up. So to take care of this, release the space for the meta
723 * reservation here. I think it may be time for a documentation page on
724 * how block rsvs. work.
727 trace_btrfs_space_reservation(root->fs_info, "delayed_inode",
728 btrfs_ino(inode), num_bytes, 1);
729 node->bytes_reserved = num_bytes;
733 trace_btrfs_space_reservation(root->fs_info, "delalloc",
734 btrfs_ino(inode), num_bytes, 0);
735 btrfs_block_rsv_release(root, src_rsv, num_bytes);
741 static void btrfs_delayed_inode_release_metadata(struct btrfs_root *root,
742 struct btrfs_delayed_node *node)
744 struct btrfs_block_rsv *rsv;
746 if (!node->bytes_reserved)
749 rsv = &root->fs_info->delayed_block_rsv;
750 trace_btrfs_space_reservation(root->fs_info, "delayed_inode",
751 node->inode_id, node->bytes_reserved, 0);
752 btrfs_block_rsv_release(root, rsv,
753 node->bytes_reserved);
754 node->bytes_reserved = 0;
758 * This helper will insert some continuous items into the same leaf according
759 * to the free space of the leaf.
761 static int btrfs_batch_insert_items(struct btrfs_trans_handle *trans,
762 struct btrfs_root *root,
763 struct btrfs_path *path,
764 struct btrfs_delayed_item *item)
766 struct btrfs_delayed_item *curr, *next;
768 int total_data_size = 0, total_size = 0;
769 struct extent_buffer *leaf;
771 struct btrfs_key *keys;
773 struct list_head head;
779 BUG_ON(!path->nodes[0]);
781 leaf = path->nodes[0];
782 free_space = btrfs_leaf_free_space(root, leaf);
783 INIT_LIST_HEAD(&head);
789 * count the number of the continuous items that we can insert in batch
791 while (total_size + next->data_len + sizeof(struct btrfs_item) <=
793 total_data_size += next->data_len;
794 total_size += next->data_len + sizeof(struct btrfs_item);
795 list_add_tail(&next->tree_list, &head);
799 next = __btrfs_next_delayed_item(curr);
803 if (!btrfs_is_continuous_delayed_item(curr, next))
813 * we need allocate some memory space, but it might cause the task
814 * to sleep, so we set all locked nodes in the path to blocking locks
817 btrfs_set_path_blocking(path);
819 keys = kmalloc(sizeof(struct btrfs_key) * nitems, GFP_NOFS);
825 data_size = kmalloc(sizeof(u32) * nitems, GFP_NOFS);
831 /* get keys of all the delayed items */
833 list_for_each_entry(next, &head, tree_list) {
835 data_size[i] = next->data_len;
839 /* reset all the locked nodes in the patch to spinning locks. */
840 btrfs_clear_path_blocking(path, NULL, 0);
842 /* insert the keys of the items */
843 setup_items_for_insert(trans, root, path, keys, data_size,
844 total_data_size, total_size, nitems);
846 /* insert the dir index items */
847 slot = path->slots[0];
848 list_for_each_entry_safe(curr, next, &head, tree_list) {
849 data_ptr = btrfs_item_ptr(leaf, slot, char);
850 write_extent_buffer(leaf, &curr->data,
851 (unsigned long)data_ptr,
855 btrfs_delayed_item_release_metadata(root, curr);
857 list_del(&curr->tree_list);
858 btrfs_release_delayed_item(curr);
869 * This helper can just do simple insertion that needn't extend item for new
870 * data, such as directory name index insertion, inode insertion.
872 static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans,
873 struct btrfs_root *root,
874 struct btrfs_path *path,
875 struct btrfs_delayed_item *delayed_item)
877 struct extent_buffer *leaf;
881 ret = btrfs_insert_empty_item(trans, root, path, &delayed_item->key,
882 delayed_item->data_len);
883 if (ret < 0 && ret != -EEXIST)
886 leaf = path->nodes[0];
888 ptr = btrfs_item_ptr(leaf, path->slots[0], char);
890 write_extent_buffer(leaf, delayed_item->data, (unsigned long)ptr,
891 delayed_item->data_len);
892 btrfs_mark_buffer_dirty(leaf);
894 btrfs_delayed_item_release_metadata(root, delayed_item);
899 * we insert an item first, then if there are some continuous items, we try
900 * to insert those items into the same leaf.
902 static int btrfs_insert_delayed_items(struct btrfs_trans_handle *trans,
903 struct btrfs_path *path,
904 struct btrfs_root *root,
905 struct btrfs_delayed_node *node)
907 struct btrfs_delayed_item *curr, *prev;
911 mutex_lock(&node->mutex);
912 curr = __btrfs_first_delayed_insertion_item(node);
916 ret = btrfs_insert_delayed_item(trans, root, path, curr);
918 btrfs_release_path(path);
923 curr = __btrfs_next_delayed_item(prev);
924 if (curr && btrfs_is_continuous_delayed_item(prev, curr)) {
925 /* insert the continuous items into the same leaf */
927 btrfs_batch_insert_items(trans, root, path, curr);
929 btrfs_release_delayed_item(prev);
930 btrfs_mark_buffer_dirty(path->nodes[0]);
932 btrfs_release_path(path);
933 mutex_unlock(&node->mutex);
937 mutex_unlock(&node->mutex);
941 static int btrfs_batch_delete_items(struct btrfs_trans_handle *trans,
942 struct btrfs_root *root,
943 struct btrfs_path *path,
944 struct btrfs_delayed_item *item)
946 struct btrfs_delayed_item *curr, *next;
947 struct extent_buffer *leaf;
948 struct btrfs_key key;
949 struct list_head head;
950 int nitems, i, last_item;
953 BUG_ON(!path->nodes[0]);
955 leaf = path->nodes[0];
958 last_item = btrfs_header_nritems(leaf) - 1;
960 return -ENOENT; /* FIXME: Is errno suitable? */
963 INIT_LIST_HEAD(&head);
964 btrfs_item_key_to_cpu(leaf, &key, i);
967 * count the number of the dir index items that we can delete in batch
969 while (btrfs_comp_cpu_keys(&next->key, &key) == 0) {
970 list_add_tail(&next->tree_list, &head);
974 next = __btrfs_next_delayed_item(curr);
978 if (!btrfs_is_continuous_delayed_item(curr, next))
984 btrfs_item_key_to_cpu(leaf, &key, i);
990 ret = btrfs_del_items(trans, root, path, path->slots[0], nitems);
994 list_for_each_entry_safe(curr, next, &head, tree_list) {
995 btrfs_delayed_item_release_metadata(root, curr);
996 list_del(&curr->tree_list);
997 btrfs_release_delayed_item(curr);
1004 static int btrfs_delete_delayed_items(struct btrfs_trans_handle *trans,
1005 struct btrfs_path *path,
1006 struct btrfs_root *root,
1007 struct btrfs_delayed_node *node)
1009 struct btrfs_delayed_item *curr, *prev;
1013 mutex_lock(&node->mutex);
1014 curr = __btrfs_first_delayed_deletion_item(node);
1018 ret = btrfs_search_slot(trans, root, &curr->key, path, -1, 1);
1023 * can't find the item which the node points to, so this node
1024 * is invalid, just drop it.
1027 curr = __btrfs_next_delayed_item(prev);
1028 btrfs_release_delayed_item(prev);
1030 btrfs_release_path(path);
1032 mutex_unlock(&node->mutex);
1038 btrfs_batch_delete_items(trans, root, path, curr);
1039 btrfs_release_path(path);
1040 mutex_unlock(&node->mutex);
1044 btrfs_release_path(path);
1045 mutex_unlock(&node->mutex);
1049 static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node)
1051 struct btrfs_delayed_root *delayed_root;
1053 if (delayed_node && delayed_node->inode_dirty) {
1054 BUG_ON(!delayed_node->root);
1055 delayed_node->inode_dirty = 0;
1056 delayed_node->count--;
1058 delayed_root = delayed_node->root->fs_info->delayed_root;
1059 if (atomic_dec_return(&delayed_root->items) <
1060 BTRFS_DELAYED_BACKGROUND &&
1061 waitqueue_active(&delayed_root->wait))
1062 wake_up(&delayed_root->wait);
1066 static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans,
1067 struct btrfs_root *root,
1068 struct btrfs_path *path,
1069 struct btrfs_delayed_node *node)
1071 struct btrfs_key key;
1072 struct btrfs_inode_item *inode_item;
1073 struct extent_buffer *leaf;
1076 key.objectid = node->inode_id;
1077 btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
1080 ret = btrfs_lookup_inode(trans, root, path, &key, 1);
1082 btrfs_release_path(path);
1084 } else if (ret < 0) {
1088 btrfs_unlock_up_safe(path, 1);
1089 leaf = path->nodes[0];
1090 inode_item = btrfs_item_ptr(leaf, path->slots[0],
1091 struct btrfs_inode_item);
1092 write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item,
1093 sizeof(struct btrfs_inode_item));
1094 btrfs_mark_buffer_dirty(leaf);
1095 btrfs_release_path(path);
1097 btrfs_delayed_inode_release_metadata(root, node);
1098 btrfs_release_delayed_inode(node);
1103 static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans,
1104 struct btrfs_root *root,
1105 struct btrfs_path *path,
1106 struct btrfs_delayed_node *node)
1110 mutex_lock(&node->mutex);
1111 if (!node->inode_dirty) {
1112 mutex_unlock(&node->mutex);
1116 ret = __btrfs_update_delayed_inode(trans, root, path, node);
1117 mutex_unlock(&node->mutex);
1122 __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
1123 struct btrfs_path *path,
1124 struct btrfs_delayed_node *node)
1128 ret = btrfs_insert_delayed_items(trans, path, node->root, node);
1132 ret = btrfs_delete_delayed_items(trans, path, node->root, node);
1136 ret = btrfs_update_delayed_inode(trans, node->root, path, node);
1141 * Called when committing the transaction.
1142 * Returns 0 on success.
1143 * Returns < 0 on error and returns with an aborted transaction with any
1144 * outstanding delayed items cleaned up.
1146 static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
1147 struct btrfs_root *root, int nr)
1149 struct btrfs_delayed_root *delayed_root;
1150 struct btrfs_delayed_node *curr_node, *prev_node;
1151 struct btrfs_path *path;
1152 struct btrfs_block_rsv *block_rsv;
1154 bool count = (nr > 0);
1159 path = btrfs_alloc_path();
1162 path->leave_spinning = 1;
1164 block_rsv = trans->block_rsv;
1165 trans->block_rsv = &root->fs_info->delayed_block_rsv;
1167 delayed_root = btrfs_get_delayed_root(root);
1169 curr_node = btrfs_first_delayed_node(delayed_root);
1170 while (curr_node && (!count || (count && nr--))) {
1171 ret = __btrfs_commit_inode_delayed_items(trans, path,
1174 btrfs_release_delayed_node(curr_node);
1176 btrfs_abort_transaction(trans, root, ret);
1180 prev_node = curr_node;
1181 curr_node = btrfs_next_delayed_node(curr_node);
1182 btrfs_release_delayed_node(prev_node);
1186 btrfs_release_delayed_node(curr_node);
1187 btrfs_free_path(path);
1188 trans->block_rsv = block_rsv;
1193 int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
1194 struct btrfs_root *root)
1196 return __btrfs_run_delayed_items(trans, root, -1);
1199 int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans,
1200 struct btrfs_root *root, int nr)
1202 return __btrfs_run_delayed_items(trans, root, nr);
1205 int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
1206 struct inode *inode)
1208 struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode);
1209 struct btrfs_path *path;
1210 struct btrfs_block_rsv *block_rsv;
1216 mutex_lock(&delayed_node->mutex);
1217 if (!delayed_node->count) {
1218 mutex_unlock(&delayed_node->mutex);
1219 btrfs_release_delayed_node(delayed_node);
1222 mutex_unlock(&delayed_node->mutex);
1224 path = btrfs_alloc_path();
1227 path->leave_spinning = 1;
1229 block_rsv = trans->block_rsv;
1230 trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv;
1232 ret = __btrfs_commit_inode_delayed_items(trans, path, delayed_node);
1234 btrfs_release_delayed_node(delayed_node);
1235 btrfs_free_path(path);
1236 trans->block_rsv = block_rsv;
1241 int btrfs_commit_inode_delayed_inode(struct inode *inode)
1243 struct btrfs_trans_handle *trans;
1244 struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode);
1245 struct btrfs_path *path;
1246 struct btrfs_block_rsv *block_rsv;
1252 mutex_lock(&delayed_node->mutex);
1253 if (!delayed_node->inode_dirty) {
1254 mutex_unlock(&delayed_node->mutex);
1255 btrfs_release_delayed_node(delayed_node);
1258 mutex_unlock(&delayed_node->mutex);
1260 trans = btrfs_join_transaction(delayed_node->root);
1261 if (IS_ERR(trans)) {
1262 ret = PTR_ERR(trans);
1266 path = btrfs_alloc_path();
1271 path->leave_spinning = 1;
1273 block_rsv = trans->block_rsv;
1274 trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv;
1276 mutex_lock(&delayed_node->mutex);
1277 if (delayed_node->inode_dirty)
1278 ret = __btrfs_update_delayed_inode(trans, delayed_node->root,
1279 path, delayed_node);
1282 mutex_unlock(&delayed_node->mutex);
1284 btrfs_free_path(path);
1285 trans->block_rsv = block_rsv;
1287 btrfs_end_transaction(trans, delayed_node->root);
1288 btrfs_btree_balance_dirty(delayed_node->root);
1290 btrfs_release_delayed_node(delayed_node);
1295 void btrfs_remove_delayed_node(struct inode *inode)
1297 struct btrfs_delayed_node *delayed_node;
1299 delayed_node = ACCESS_ONCE(BTRFS_I(inode)->delayed_node);
1303 BTRFS_I(inode)->delayed_node = NULL;
1304 btrfs_release_delayed_node(delayed_node);
1307 struct btrfs_async_delayed_node {
1308 struct btrfs_root *root;
1309 struct btrfs_delayed_node *delayed_node;
1310 struct btrfs_work work;
1313 static void btrfs_async_run_delayed_node_done(struct btrfs_work *work)
1315 struct btrfs_async_delayed_node *async_node;
1316 struct btrfs_trans_handle *trans;
1317 struct btrfs_path *path;
1318 struct btrfs_delayed_node *delayed_node = NULL;
1319 struct btrfs_root *root;
1320 struct btrfs_block_rsv *block_rsv;
1321 int need_requeue = 0;
1323 async_node = container_of(work, struct btrfs_async_delayed_node, work);
1325 path = btrfs_alloc_path();
1328 path->leave_spinning = 1;
1330 delayed_node = async_node->delayed_node;
1331 root = delayed_node->root;
1333 trans = btrfs_join_transaction(root);
1337 block_rsv = trans->block_rsv;
1338 trans->block_rsv = &root->fs_info->delayed_block_rsv;
1340 __btrfs_commit_inode_delayed_items(trans, path, delayed_node);
1342 * Maybe new delayed items have been inserted, so we need requeue
1343 * the work. Besides that, we must dequeue the empty delayed nodes
1344 * to avoid the race between delayed items balance and the worker.
1345 * The race like this:
1346 * Task1 Worker thread
1347 * count == 0, needn't requeue
1348 * also needn't insert the
1349 * delayed node into prepare
1351 * add lots of delayed items
1352 * queue the delayed node
1353 * already in the list,
1354 * and not in the prepare
1355 * list, it means the delayed
1356 * node is being dealt with
1358 * do delayed items balance
1359 * the delayed node is being
1360 * dealt with by the worker
1362 * the worker goto idle.
1363 * Task1 will sleep until the transaction is commited.
1365 mutex_lock(&delayed_node->mutex);
1366 if (delayed_node->count)
1369 btrfs_dequeue_delayed_node(root->fs_info->delayed_root,
1371 mutex_unlock(&delayed_node->mutex);
1373 trans->block_rsv = block_rsv;
1374 btrfs_end_transaction_dmeta(trans, root);
1375 btrfs_btree_balance_dirty_nodelay(root);
1377 btrfs_free_path(path);
1380 btrfs_requeue_work(&async_node->work);
1382 btrfs_release_prepared_delayed_node(delayed_node);
1387 static int btrfs_wq_run_delayed_node(struct btrfs_delayed_root *delayed_root,
1388 struct btrfs_root *root, int all)
1390 struct btrfs_async_delayed_node *async_node;
1391 struct btrfs_delayed_node *curr;
1395 curr = btrfs_first_prepared_delayed_node(delayed_root);
1399 async_node = kmalloc(sizeof(*async_node), GFP_NOFS);
1401 btrfs_release_prepared_delayed_node(curr);
1405 async_node->root = root;
1406 async_node->delayed_node = curr;
1408 async_node->work.func = btrfs_async_run_delayed_node_done;
1409 async_node->work.flags = 0;
1411 btrfs_queue_worker(&root->fs_info->delayed_workers, &async_node->work);
1414 if (all || count < 4)
1420 void btrfs_assert_delayed_root_empty(struct btrfs_root *root)
1422 struct btrfs_delayed_root *delayed_root;
1423 delayed_root = btrfs_get_delayed_root(root);
1424 WARN_ON(btrfs_first_delayed_node(delayed_root));
1427 void btrfs_balance_delayed_items(struct btrfs_root *root)
1429 struct btrfs_delayed_root *delayed_root;
1431 delayed_root = btrfs_get_delayed_root(root);
1433 if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND)
1436 if (atomic_read(&delayed_root->items) >= BTRFS_DELAYED_WRITEBACK) {
1438 ret = btrfs_wq_run_delayed_node(delayed_root, root, 1);
1442 wait_event_interruptible_timeout(
1444 (atomic_read(&delayed_root->items) <
1445 BTRFS_DELAYED_BACKGROUND),
1450 btrfs_wq_run_delayed_node(delayed_root, root, 0);
1453 /* Will return 0 or -ENOMEM */
1454 int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
1455 struct btrfs_root *root, const char *name,
1456 int name_len, struct inode *dir,
1457 struct btrfs_disk_key *disk_key, u8 type,
1460 struct btrfs_delayed_node *delayed_node;
1461 struct btrfs_delayed_item *delayed_item;
1462 struct btrfs_dir_item *dir_item;
1465 delayed_node = btrfs_get_or_create_delayed_node(dir);
1466 if (IS_ERR(delayed_node))
1467 return PTR_ERR(delayed_node);
1469 delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len);
1470 if (!delayed_item) {
1475 delayed_item->key.objectid = btrfs_ino(dir);
1476 btrfs_set_key_type(&delayed_item->key, BTRFS_DIR_INDEX_KEY);
1477 delayed_item->key.offset = index;
1479 dir_item = (struct btrfs_dir_item *)delayed_item->data;
1480 dir_item->location = *disk_key;
1481 dir_item->transid = cpu_to_le64(trans->transid);
1482 dir_item->data_len = 0;
1483 dir_item->name_len = cpu_to_le16(name_len);
1484 dir_item->type = type;
1485 memcpy((char *)(dir_item + 1), name, name_len);
1487 ret = btrfs_delayed_item_reserve_metadata(trans, root, delayed_item);
1489 * we have reserved enough space when we start a new transaction,
1490 * so reserving metadata failure is impossible
1495 mutex_lock(&delayed_node->mutex);
1496 ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item);
1497 if (unlikely(ret)) {
1498 printk(KERN_ERR "err add delayed dir index item(name: %s) into "
1499 "the insertion tree of the delayed node"
1500 "(root id: %llu, inode id: %llu, errno: %d)\n",
1502 (unsigned long long)delayed_node->root->objectid,
1503 (unsigned long long)delayed_node->inode_id,
1507 mutex_unlock(&delayed_node->mutex);
1510 btrfs_release_delayed_node(delayed_node);
1514 static int btrfs_delete_delayed_insertion_item(struct btrfs_root *root,
1515 struct btrfs_delayed_node *node,
1516 struct btrfs_key *key)
1518 struct btrfs_delayed_item *item;
1520 mutex_lock(&node->mutex);
1521 item = __btrfs_lookup_delayed_insertion_item(node, key);
1523 mutex_unlock(&node->mutex);
1527 btrfs_delayed_item_release_metadata(root, item);
1528 btrfs_release_delayed_item(item);
1529 mutex_unlock(&node->mutex);
1533 int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
1534 struct btrfs_root *root, struct inode *dir,
1537 struct btrfs_delayed_node *node;
1538 struct btrfs_delayed_item *item;
1539 struct btrfs_key item_key;
1542 node = btrfs_get_or_create_delayed_node(dir);
1544 return PTR_ERR(node);
1546 item_key.objectid = btrfs_ino(dir);
1547 btrfs_set_key_type(&item_key, BTRFS_DIR_INDEX_KEY);
1548 item_key.offset = index;
1550 ret = btrfs_delete_delayed_insertion_item(root, node, &item_key);
1554 item = btrfs_alloc_delayed_item(0);
1560 item->key = item_key;
1562 ret = btrfs_delayed_item_reserve_metadata(trans, root, item);
1564 * we have reserved enough space when we start a new transaction,
1565 * so reserving metadata failure is impossible.
1569 mutex_lock(&node->mutex);
1570 ret = __btrfs_add_delayed_deletion_item(node, item);
1571 if (unlikely(ret)) {
1572 printk(KERN_ERR "err add delayed dir index item(index: %llu) "
1573 "into the deletion tree of the delayed node"
1574 "(root id: %llu, inode id: %llu, errno: %d)\n",
1575 (unsigned long long)index,
1576 (unsigned long long)node->root->objectid,
1577 (unsigned long long)node->inode_id,
1581 mutex_unlock(&node->mutex);
1583 btrfs_release_delayed_node(node);
1587 int btrfs_inode_delayed_dir_index_count(struct inode *inode)
1589 struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode);
1595 * Since we have held i_mutex of this directory, it is impossible that
1596 * a new directory index is added into the delayed node and index_cnt
1597 * is updated now. So we needn't lock the delayed node.
1599 if (!delayed_node->index_cnt) {
1600 btrfs_release_delayed_node(delayed_node);
1604 BTRFS_I(inode)->index_cnt = delayed_node->index_cnt;
1605 btrfs_release_delayed_node(delayed_node);
1609 void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
1610 struct list_head *del_list)
1612 struct btrfs_delayed_node *delayed_node;
1613 struct btrfs_delayed_item *item;
1615 delayed_node = btrfs_get_delayed_node(inode);
1619 mutex_lock(&delayed_node->mutex);
1620 item = __btrfs_first_delayed_insertion_item(delayed_node);
1622 atomic_inc(&item->refs);
1623 list_add_tail(&item->readdir_list, ins_list);
1624 item = __btrfs_next_delayed_item(item);
1627 item = __btrfs_first_delayed_deletion_item(delayed_node);
1629 atomic_inc(&item->refs);
1630 list_add_tail(&item->readdir_list, del_list);
1631 item = __btrfs_next_delayed_item(item);
1633 mutex_unlock(&delayed_node->mutex);
1635 * This delayed node is still cached in the btrfs inode, so refs
1636 * must be > 1 now, and we needn't check it is going to be freed
1639 * Besides that, this function is used to read dir, we do not
1640 * insert/delete delayed items in this period. So we also needn't
1641 * requeue or dequeue this delayed node.
1643 atomic_dec(&delayed_node->refs);
1646 void btrfs_put_delayed_items(struct list_head *ins_list,
1647 struct list_head *del_list)
1649 struct btrfs_delayed_item *curr, *next;
1651 list_for_each_entry_safe(curr, next, ins_list, readdir_list) {
1652 list_del(&curr->readdir_list);
1653 if (atomic_dec_and_test(&curr->refs))
1657 list_for_each_entry_safe(curr, next, del_list, readdir_list) {
1658 list_del(&curr->readdir_list);
1659 if (atomic_dec_and_test(&curr->refs))
1664 int btrfs_should_delete_dir_index(struct list_head *del_list,
1667 struct btrfs_delayed_item *curr, *next;
1670 if (list_empty(del_list))
1673 list_for_each_entry_safe(curr, next, del_list, readdir_list) {
1674 if (curr->key.offset > index)
1677 list_del(&curr->readdir_list);
1678 ret = (curr->key.offset == index);
1680 if (atomic_dec_and_test(&curr->refs))
1692 * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree
1695 int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent,
1697 struct list_head *ins_list)
1699 struct btrfs_dir_item *di;
1700 struct btrfs_delayed_item *curr, *next;
1701 struct btrfs_key location;
1705 unsigned char d_type;
1707 if (list_empty(ins_list))
1711 * Changing the data of the delayed item is impossible. So
1712 * we needn't lock them. And we have held i_mutex of the
1713 * directory, nobody can delete any directory indexes now.
1715 list_for_each_entry_safe(curr, next, ins_list, readdir_list) {
1716 list_del(&curr->readdir_list);
1718 if (curr->key.offset < filp->f_pos) {
1719 if (atomic_dec_and_test(&curr->refs))
1724 filp->f_pos = curr->key.offset;
1726 di = (struct btrfs_dir_item *)curr->data;
1727 name = (char *)(di + 1);
1728 name_len = le16_to_cpu(di->name_len);
1730 d_type = btrfs_filetype_table[di->type];
1731 btrfs_disk_key_to_cpu(&location, &di->location);
1733 over = filldir(dirent, name, name_len, curr->key.offset,
1734 location.objectid, d_type);
1736 if (atomic_dec_and_test(&curr->refs))
1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1761 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1763 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1764 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1766 static void fill_stack_inode_item(struct btrfs_trans_handle *trans,
1767 struct btrfs_inode_item *inode_item,
1768 struct inode *inode)
1770 btrfs_set_stack_inode_uid(inode_item, i_uid_read(inode));
1771 btrfs_set_stack_inode_gid(inode_item, i_gid_read(inode));
1772 btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size);
1773 btrfs_set_stack_inode_mode(inode_item, inode->i_mode);
1774 btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink);
1775 btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode));
1776 btrfs_set_stack_inode_generation(inode_item,
1777 BTRFS_I(inode)->generation);
1778 btrfs_set_stack_inode_sequence(inode_item, inode->i_version);
1779 btrfs_set_stack_inode_transid(inode_item, trans->transid);
1780 btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev);
1781 btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags);
1782 btrfs_set_stack_inode_block_group(inode_item, 0);
1784 btrfs_set_stack_timespec_sec(btrfs_inode_atime(inode_item),
1785 inode->i_atime.tv_sec);
1786 btrfs_set_stack_timespec_nsec(btrfs_inode_atime(inode_item),
1787 inode->i_atime.tv_nsec);
1789 btrfs_set_stack_timespec_sec(btrfs_inode_mtime(inode_item),
1790 inode->i_mtime.tv_sec);
1791 btrfs_set_stack_timespec_nsec(btrfs_inode_mtime(inode_item),
1792 inode->i_mtime.tv_nsec);
1794 btrfs_set_stack_timespec_sec(btrfs_inode_ctime(inode_item),
1795 inode->i_ctime.tv_sec);
1796 btrfs_set_stack_timespec_nsec(btrfs_inode_ctime(inode_item),
1797 inode->i_ctime.tv_nsec);
1800 int btrfs_fill_inode(struct inode *inode, u32 *rdev)
1802 struct btrfs_delayed_node *delayed_node;
1803 struct btrfs_inode_item *inode_item;
1804 struct btrfs_timespec *tspec;
1806 delayed_node = btrfs_get_delayed_node(inode);
1810 mutex_lock(&delayed_node->mutex);
1811 if (!delayed_node->inode_dirty) {
1812 mutex_unlock(&delayed_node->mutex);
1813 btrfs_release_delayed_node(delayed_node);
1817 inode_item = &delayed_node->inode_item;
1819 i_uid_write(inode, btrfs_stack_inode_uid(inode_item));
1820 i_gid_write(inode, btrfs_stack_inode_gid(inode_item));
1821 btrfs_i_size_write(inode, btrfs_stack_inode_size(inode_item));
1822 inode->i_mode = btrfs_stack_inode_mode(inode_item);
1823 set_nlink(inode, btrfs_stack_inode_nlink(inode_item));
1824 inode_set_bytes(inode, btrfs_stack_inode_nbytes(inode_item));
1825 BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item);
1826 inode->i_version = btrfs_stack_inode_sequence(inode_item);
1828 *rdev = btrfs_stack_inode_rdev(inode_item);
1829 BTRFS_I(inode)->flags = btrfs_stack_inode_flags(inode_item);
1831 tspec = btrfs_inode_atime(inode_item);
1832 inode->i_atime.tv_sec = btrfs_stack_timespec_sec(tspec);
1833 inode->i_atime.tv_nsec = btrfs_stack_timespec_nsec(tspec);
1835 tspec = btrfs_inode_mtime(inode_item);
1836 inode->i_mtime.tv_sec = btrfs_stack_timespec_sec(tspec);
1837 inode->i_mtime.tv_nsec = btrfs_stack_timespec_nsec(tspec);
1839 tspec = btrfs_inode_ctime(inode_item);
1840 inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(tspec);
1841 inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(tspec);
1843 inode->i_generation = BTRFS_I(inode)->generation;
1844 BTRFS_I(inode)->index_cnt = (u64)-1;
1846 mutex_unlock(&delayed_node->mutex);
1847 btrfs_release_delayed_node(delayed_node);
1851 int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root, struct inode *inode)
1854 struct btrfs_delayed_node *delayed_node;
1857 delayed_node = btrfs_get_or_create_delayed_node(inode);
1858 if (IS_ERR(delayed_node))
1859 return PTR_ERR(delayed_node);
1861 mutex_lock(&delayed_node->mutex);
1862 if (delayed_node->inode_dirty) {
1863 fill_stack_inode_item(trans, &delayed_node->inode_item, inode);
1867 ret = btrfs_delayed_inode_reserve_metadata(trans, root, inode,
1872 fill_stack_inode_item(trans, &delayed_node->inode_item, inode);
1873 delayed_node->inode_dirty = 1;
1874 delayed_node->count++;
1875 atomic_inc(&root->fs_info->delayed_root->items);
1877 mutex_unlock(&delayed_node->mutex);
1878 btrfs_release_delayed_node(delayed_node);
1882 static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node)
1884 struct btrfs_root *root = delayed_node->root;
1885 struct btrfs_delayed_item *curr_item, *prev_item;
1887 mutex_lock(&delayed_node->mutex);
1888 curr_item = __btrfs_first_delayed_insertion_item(delayed_node);
1890 btrfs_delayed_item_release_metadata(root, curr_item);
1891 prev_item = curr_item;
1892 curr_item = __btrfs_next_delayed_item(prev_item);
1893 btrfs_release_delayed_item(prev_item);
1896 curr_item = __btrfs_first_delayed_deletion_item(delayed_node);
1898 btrfs_delayed_item_release_metadata(root, curr_item);
1899 prev_item = curr_item;
1900 curr_item = __btrfs_next_delayed_item(prev_item);
1901 btrfs_release_delayed_item(prev_item);
1904 if (delayed_node->inode_dirty) {
1905 btrfs_delayed_inode_release_metadata(root, delayed_node);
1906 btrfs_release_delayed_inode(delayed_node);
1908 mutex_unlock(&delayed_node->mutex);
1911 void btrfs_kill_delayed_inode_items(struct inode *inode)
1913 struct btrfs_delayed_node *delayed_node;
1915 delayed_node = btrfs_get_delayed_node(inode);
1919 __btrfs_kill_delayed_node(delayed_node);
1920 btrfs_release_delayed_node(delayed_node);
1923 void btrfs_kill_all_delayed_nodes(struct btrfs_root *root)
1926 struct btrfs_delayed_node *delayed_nodes[8];
1930 spin_lock(&root->inode_lock);
1931 n = radix_tree_gang_lookup(&root->delayed_nodes_tree,
1932 (void **)delayed_nodes, inode_id,
1933 ARRAY_SIZE(delayed_nodes));
1935 spin_unlock(&root->inode_lock);
1939 inode_id = delayed_nodes[n - 1]->inode_id + 1;
1941 for (i = 0; i < n; i++)
1942 atomic_inc(&delayed_nodes[i]->refs);
1943 spin_unlock(&root->inode_lock);
1945 for (i = 0; i < n; i++) {
1946 __btrfs_kill_delayed_node(delayed_nodes[i]);
1947 btrfs_release_delayed_node(delayed_nodes[i]);
1952 void btrfs_destroy_delayed_inodes(struct btrfs_root *root)
1954 struct btrfs_delayed_root *delayed_root;
1955 struct btrfs_delayed_node *curr_node, *prev_node;
1957 delayed_root = btrfs_get_delayed_root(root);
1959 curr_node = btrfs_first_delayed_node(delayed_root);
1961 __btrfs_kill_delayed_node(curr_node);
1963 prev_node = curr_node;
1964 curr_node = btrfs_next_delayed_node(curr_node);
1965 btrfs_release_delayed_node(prev_node);