116cdcec7SMiao Xie /* 216cdcec7SMiao Xie * Copyright (C) 2011 Fujitsu. All rights reserved. 316cdcec7SMiao Xie * Written by Miao Xie <miaox@cn.fujitsu.com> 416cdcec7SMiao Xie * 516cdcec7SMiao Xie * This program is free software; you can redistribute it and/or 616cdcec7SMiao Xie * modify it under the terms of the GNU General Public 716cdcec7SMiao Xie * License v2 as published by the Free Software Foundation. 816cdcec7SMiao Xie * 916cdcec7SMiao Xie * This program is distributed in the hope that it will be useful, 1016cdcec7SMiao Xie * but WITHOUT ANY WARRANTY; without even the implied warranty of 1116cdcec7SMiao Xie * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1216cdcec7SMiao Xie * General Public License for more details. 1316cdcec7SMiao Xie * 1416cdcec7SMiao Xie * You should have received a copy of the GNU General Public 1516cdcec7SMiao Xie * License along with this program; if not, write to the 1616cdcec7SMiao Xie * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 1716cdcec7SMiao Xie * Boston, MA 021110-1307, USA. 1816cdcec7SMiao Xie */ 1916cdcec7SMiao Xie 2016cdcec7SMiao Xie #include <linux/slab.h> 2116cdcec7SMiao Xie #include "delayed-inode.h" 2216cdcec7SMiao Xie #include "disk-io.h" 2316cdcec7SMiao Xie #include "transaction.h" 243cae210fSQu Wenruo #include "ctree.h" 2516cdcec7SMiao Xie 26de3cb945SChris Mason #define BTRFS_DELAYED_WRITEBACK 512 27de3cb945SChris Mason #define BTRFS_DELAYED_BACKGROUND 128 28de3cb945SChris Mason #define BTRFS_DELAYED_BATCH 16 2916cdcec7SMiao Xie 3016cdcec7SMiao Xie static struct kmem_cache *delayed_node_cache; 3116cdcec7SMiao Xie 3216cdcec7SMiao Xie int __init btrfs_delayed_inode_init(void) 3316cdcec7SMiao Xie { 34837e1972SDavid Sterba delayed_node_cache = kmem_cache_create("btrfs_delayed_node", 3516cdcec7SMiao Xie sizeof(struct btrfs_delayed_node), 3616cdcec7SMiao Xie 0, 37fba4b697SNikolay Borisov SLAB_MEM_SPREAD, 3816cdcec7SMiao Xie NULL); 3916cdcec7SMiao Xie if (!delayed_node_cache) 4016cdcec7SMiao Xie return -ENOMEM; 4116cdcec7SMiao Xie return 0; 4216cdcec7SMiao Xie } 4316cdcec7SMiao Xie 4416cdcec7SMiao Xie void btrfs_delayed_inode_exit(void) 4516cdcec7SMiao Xie { 4616cdcec7SMiao Xie kmem_cache_destroy(delayed_node_cache); 4716cdcec7SMiao Xie } 4816cdcec7SMiao Xie 4916cdcec7SMiao Xie static inline void btrfs_init_delayed_node( 5016cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node, 5116cdcec7SMiao Xie struct btrfs_root *root, u64 inode_id) 5216cdcec7SMiao Xie { 5316cdcec7SMiao Xie delayed_node->root = root; 5416cdcec7SMiao Xie delayed_node->inode_id = inode_id; 5516cdcec7SMiao Xie atomic_set(&delayed_node->refs, 0); 5616cdcec7SMiao Xie delayed_node->ins_root = RB_ROOT; 5716cdcec7SMiao Xie delayed_node->del_root = RB_ROOT; 5816cdcec7SMiao Xie mutex_init(&delayed_node->mutex); 5916cdcec7SMiao Xie INIT_LIST_HEAD(&delayed_node->n_list); 6016cdcec7SMiao Xie INIT_LIST_HEAD(&delayed_node->p_list); 6116cdcec7SMiao Xie } 6216cdcec7SMiao Xie 6316cdcec7SMiao Xie static inline int btrfs_is_continuous_delayed_item( 6416cdcec7SMiao Xie struct btrfs_delayed_item *item1, 6516cdcec7SMiao Xie struct btrfs_delayed_item *item2) 6616cdcec7SMiao Xie { 6716cdcec7SMiao Xie if (item1->key.type == BTRFS_DIR_INDEX_KEY && 6816cdcec7SMiao Xie item1->key.objectid == item2->key.objectid && 6916cdcec7SMiao Xie item1->key.type == item2->key.type && 7016cdcec7SMiao Xie item1->key.offset + 1 == item2->key.offset) 7116cdcec7SMiao Xie return 1; 7216cdcec7SMiao Xie return 0; 7316cdcec7SMiao Xie } 7416cdcec7SMiao Xie 7516cdcec7SMiao Xie static inline struct btrfs_delayed_root *btrfs_get_delayed_root( 7616cdcec7SMiao Xie struct btrfs_root *root) 7716cdcec7SMiao Xie { 7816cdcec7SMiao Xie return root->fs_info->delayed_root; 7916cdcec7SMiao Xie } 8016cdcec7SMiao Xie 812f7e33d4SMiao Xie static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode) 822f7e33d4SMiao Xie { 832f7e33d4SMiao Xie struct btrfs_inode *btrfs_inode = BTRFS_I(inode); 842f7e33d4SMiao Xie struct btrfs_root *root = btrfs_inode->root; 852f7e33d4SMiao Xie u64 ino = btrfs_ino(inode); 862f7e33d4SMiao Xie struct btrfs_delayed_node *node; 872f7e33d4SMiao Xie 882f7e33d4SMiao Xie node = ACCESS_ONCE(btrfs_inode->delayed_node); 892f7e33d4SMiao Xie if (node) { 902f7e33d4SMiao Xie atomic_inc(&node->refs); 912f7e33d4SMiao Xie return node; 922f7e33d4SMiao Xie } 932f7e33d4SMiao Xie 942f7e33d4SMiao Xie spin_lock(&root->inode_lock); 952f7e33d4SMiao Xie node = radix_tree_lookup(&root->delayed_nodes_tree, ino); 962f7e33d4SMiao Xie if (node) { 972f7e33d4SMiao Xie if (btrfs_inode->delayed_node) { 982f7e33d4SMiao Xie atomic_inc(&node->refs); /* can be accessed */ 992f7e33d4SMiao Xie BUG_ON(btrfs_inode->delayed_node != node); 1002f7e33d4SMiao Xie spin_unlock(&root->inode_lock); 1012f7e33d4SMiao Xie return node; 1022f7e33d4SMiao Xie } 1032f7e33d4SMiao Xie btrfs_inode->delayed_node = node; 10495e94d14SRashika /* can be accessed and cached in the inode */ 10595e94d14SRashika atomic_add(2, &node->refs); 1062f7e33d4SMiao Xie spin_unlock(&root->inode_lock); 1072f7e33d4SMiao Xie return node; 1082f7e33d4SMiao Xie } 1092f7e33d4SMiao Xie spin_unlock(&root->inode_lock); 1102f7e33d4SMiao Xie 1112f7e33d4SMiao Xie return NULL; 1122f7e33d4SMiao Xie } 1132f7e33d4SMiao Xie 11479787eaaSJeff Mahoney /* Will return either the node or PTR_ERR(-ENOMEM) */ 11516cdcec7SMiao Xie static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node( 11616cdcec7SMiao Xie struct inode *inode) 11716cdcec7SMiao Xie { 11816cdcec7SMiao Xie struct btrfs_delayed_node *node; 11916cdcec7SMiao Xie struct btrfs_inode *btrfs_inode = BTRFS_I(inode); 12016cdcec7SMiao Xie struct btrfs_root *root = btrfs_inode->root; 1210d0ca30fSChris Mason u64 ino = btrfs_ino(inode); 12216cdcec7SMiao Xie int ret; 12316cdcec7SMiao Xie 12416cdcec7SMiao Xie again: 1252f7e33d4SMiao Xie node = btrfs_get_delayed_node(inode); 1262f7e33d4SMiao Xie if (node) 12716cdcec7SMiao Xie return node; 12816cdcec7SMiao Xie 129352dd9c8SAlexandru Moise node = kmem_cache_zalloc(delayed_node_cache, GFP_NOFS); 13016cdcec7SMiao Xie if (!node) 13116cdcec7SMiao Xie return ERR_PTR(-ENOMEM); 1320d0ca30fSChris Mason btrfs_init_delayed_node(node, root, ino); 13316cdcec7SMiao Xie 13495e94d14SRashika /* cached in the btrfs inode and can be accessed */ 13595e94d14SRashika atomic_add(2, &node->refs); 13616cdcec7SMiao Xie 137e1860a77SDavid Sterba ret = radix_tree_preload(GFP_NOFS); 13816cdcec7SMiao Xie if (ret) { 13916cdcec7SMiao Xie kmem_cache_free(delayed_node_cache, node); 14016cdcec7SMiao Xie return ERR_PTR(ret); 14116cdcec7SMiao Xie } 14216cdcec7SMiao Xie 14316cdcec7SMiao Xie spin_lock(&root->inode_lock); 1440d0ca30fSChris Mason ret = radix_tree_insert(&root->delayed_nodes_tree, ino, node); 14516cdcec7SMiao Xie if (ret == -EEXIST) { 14616cdcec7SMiao Xie spin_unlock(&root->inode_lock); 14796493031SJeff Mahoney kmem_cache_free(delayed_node_cache, node); 14816cdcec7SMiao Xie radix_tree_preload_end(); 14916cdcec7SMiao Xie goto again; 15016cdcec7SMiao Xie } 15116cdcec7SMiao Xie btrfs_inode->delayed_node = node; 15216cdcec7SMiao Xie spin_unlock(&root->inode_lock); 15316cdcec7SMiao Xie radix_tree_preload_end(); 15416cdcec7SMiao Xie 15516cdcec7SMiao Xie return node; 15616cdcec7SMiao Xie } 15716cdcec7SMiao Xie 15816cdcec7SMiao Xie /* 15916cdcec7SMiao Xie * Call it when holding delayed_node->mutex 16016cdcec7SMiao Xie * 16116cdcec7SMiao Xie * If mod = 1, add this node into the prepared list. 16216cdcec7SMiao Xie */ 16316cdcec7SMiao Xie static void btrfs_queue_delayed_node(struct btrfs_delayed_root *root, 16416cdcec7SMiao Xie struct btrfs_delayed_node *node, 16516cdcec7SMiao Xie int mod) 16616cdcec7SMiao Xie { 16716cdcec7SMiao Xie spin_lock(&root->lock); 1687cf35d91SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { 16916cdcec7SMiao Xie if (!list_empty(&node->p_list)) 17016cdcec7SMiao Xie list_move_tail(&node->p_list, &root->prepare_list); 17116cdcec7SMiao Xie else if (mod) 17216cdcec7SMiao Xie list_add_tail(&node->p_list, &root->prepare_list); 17316cdcec7SMiao Xie } else { 17416cdcec7SMiao Xie list_add_tail(&node->n_list, &root->node_list); 17516cdcec7SMiao Xie list_add_tail(&node->p_list, &root->prepare_list); 17616cdcec7SMiao Xie atomic_inc(&node->refs); /* inserted into list */ 17716cdcec7SMiao Xie root->nodes++; 1787cf35d91SMiao Xie set_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); 17916cdcec7SMiao Xie } 18016cdcec7SMiao Xie spin_unlock(&root->lock); 18116cdcec7SMiao Xie } 18216cdcec7SMiao Xie 18316cdcec7SMiao Xie /* Call it when holding delayed_node->mutex */ 18416cdcec7SMiao Xie static void btrfs_dequeue_delayed_node(struct btrfs_delayed_root *root, 18516cdcec7SMiao Xie struct btrfs_delayed_node *node) 18616cdcec7SMiao Xie { 18716cdcec7SMiao Xie spin_lock(&root->lock); 1887cf35d91SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { 18916cdcec7SMiao Xie root->nodes--; 19016cdcec7SMiao Xie atomic_dec(&node->refs); /* not in the list */ 19116cdcec7SMiao Xie list_del_init(&node->n_list); 19216cdcec7SMiao Xie if (!list_empty(&node->p_list)) 19316cdcec7SMiao Xie list_del_init(&node->p_list); 1947cf35d91SMiao Xie clear_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags); 19516cdcec7SMiao Xie } 19616cdcec7SMiao Xie spin_unlock(&root->lock); 19716cdcec7SMiao Xie } 19816cdcec7SMiao Xie 19948a3b636SEric Sandeen static struct btrfs_delayed_node *btrfs_first_delayed_node( 20016cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root) 20116cdcec7SMiao Xie { 20216cdcec7SMiao Xie struct list_head *p; 20316cdcec7SMiao Xie struct btrfs_delayed_node *node = NULL; 20416cdcec7SMiao Xie 20516cdcec7SMiao Xie spin_lock(&delayed_root->lock); 20616cdcec7SMiao Xie if (list_empty(&delayed_root->node_list)) 20716cdcec7SMiao Xie goto out; 20816cdcec7SMiao Xie 20916cdcec7SMiao Xie p = delayed_root->node_list.next; 21016cdcec7SMiao Xie node = list_entry(p, struct btrfs_delayed_node, n_list); 21116cdcec7SMiao Xie atomic_inc(&node->refs); 21216cdcec7SMiao Xie out: 21316cdcec7SMiao Xie spin_unlock(&delayed_root->lock); 21416cdcec7SMiao Xie 21516cdcec7SMiao Xie return node; 21616cdcec7SMiao Xie } 21716cdcec7SMiao Xie 21848a3b636SEric Sandeen static struct btrfs_delayed_node *btrfs_next_delayed_node( 21916cdcec7SMiao Xie struct btrfs_delayed_node *node) 22016cdcec7SMiao Xie { 22116cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 22216cdcec7SMiao Xie struct list_head *p; 22316cdcec7SMiao Xie struct btrfs_delayed_node *next = NULL; 22416cdcec7SMiao Xie 22516cdcec7SMiao Xie delayed_root = node->root->fs_info->delayed_root; 22616cdcec7SMiao Xie spin_lock(&delayed_root->lock); 2277cf35d91SMiao Xie if (!test_bit(BTRFS_DELAYED_NODE_IN_LIST, &node->flags)) { 2287cf35d91SMiao Xie /* not in the list */ 22916cdcec7SMiao Xie if (list_empty(&delayed_root->node_list)) 23016cdcec7SMiao Xie goto out; 23116cdcec7SMiao Xie p = delayed_root->node_list.next; 23216cdcec7SMiao Xie } else if (list_is_last(&node->n_list, &delayed_root->node_list)) 23316cdcec7SMiao Xie goto out; 23416cdcec7SMiao Xie else 23516cdcec7SMiao Xie p = node->n_list.next; 23616cdcec7SMiao Xie 23716cdcec7SMiao Xie next = list_entry(p, struct btrfs_delayed_node, n_list); 23816cdcec7SMiao Xie atomic_inc(&next->refs); 23916cdcec7SMiao Xie out: 24016cdcec7SMiao Xie spin_unlock(&delayed_root->lock); 24116cdcec7SMiao Xie 24216cdcec7SMiao Xie return next; 24316cdcec7SMiao Xie } 24416cdcec7SMiao Xie 24516cdcec7SMiao Xie static void __btrfs_release_delayed_node( 24616cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node, 24716cdcec7SMiao Xie int mod) 24816cdcec7SMiao Xie { 24916cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 25016cdcec7SMiao Xie 25116cdcec7SMiao Xie if (!delayed_node) 25216cdcec7SMiao Xie return; 25316cdcec7SMiao Xie 25416cdcec7SMiao Xie delayed_root = delayed_node->root->fs_info->delayed_root; 25516cdcec7SMiao Xie 25616cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 25716cdcec7SMiao Xie if (delayed_node->count) 25816cdcec7SMiao Xie btrfs_queue_delayed_node(delayed_root, delayed_node, mod); 25916cdcec7SMiao Xie else 26016cdcec7SMiao Xie btrfs_dequeue_delayed_node(delayed_root, delayed_node); 26116cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 26216cdcec7SMiao Xie 26316cdcec7SMiao Xie if (atomic_dec_and_test(&delayed_node->refs)) { 26496493031SJeff Mahoney bool free = false; 26516cdcec7SMiao Xie struct btrfs_root *root = delayed_node->root; 26616cdcec7SMiao Xie spin_lock(&root->inode_lock); 26716cdcec7SMiao Xie if (atomic_read(&delayed_node->refs) == 0) { 26816cdcec7SMiao Xie radix_tree_delete(&root->delayed_nodes_tree, 26916cdcec7SMiao Xie delayed_node->inode_id); 27096493031SJeff Mahoney free = true; 27116cdcec7SMiao Xie } 27216cdcec7SMiao Xie spin_unlock(&root->inode_lock); 27396493031SJeff Mahoney if (free) 27496493031SJeff Mahoney kmem_cache_free(delayed_node_cache, delayed_node); 27516cdcec7SMiao Xie } 27616cdcec7SMiao Xie } 27716cdcec7SMiao Xie 27816cdcec7SMiao Xie static inline void btrfs_release_delayed_node(struct btrfs_delayed_node *node) 27916cdcec7SMiao Xie { 28016cdcec7SMiao Xie __btrfs_release_delayed_node(node, 0); 28116cdcec7SMiao Xie } 28216cdcec7SMiao Xie 28348a3b636SEric Sandeen static struct btrfs_delayed_node *btrfs_first_prepared_delayed_node( 28416cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root) 28516cdcec7SMiao Xie { 28616cdcec7SMiao Xie struct list_head *p; 28716cdcec7SMiao Xie struct btrfs_delayed_node *node = NULL; 28816cdcec7SMiao Xie 28916cdcec7SMiao Xie spin_lock(&delayed_root->lock); 29016cdcec7SMiao Xie if (list_empty(&delayed_root->prepare_list)) 29116cdcec7SMiao Xie goto out; 29216cdcec7SMiao Xie 29316cdcec7SMiao Xie p = delayed_root->prepare_list.next; 29416cdcec7SMiao Xie list_del_init(p); 29516cdcec7SMiao Xie node = list_entry(p, struct btrfs_delayed_node, p_list); 29616cdcec7SMiao Xie atomic_inc(&node->refs); 29716cdcec7SMiao Xie out: 29816cdcec7SMiao Xie spin_unlock(&delayed_root->lock); 29916cdcec7SMiao Xie 30016cdcec7SMiao Xie return node; 30116cdcec7SMiao Xie } 30216cdcec7SMiao Xie 30316cdcec7SMiao Xie static inline void btrfs_release_prepared_delayed_node( 30416cdcec7SMiao Xie struct btrfs_delayed_node *node) 30516cdcec7SMiao Xie { 30616cdcec7SMiao Xie __btrfs_release_delayed_node(node, 1); 30716cdcec7SMiao Xie } 30816cdcec7SMiao Xie 30948a3b636SEric Sandeen static struct btrfs_delayed_item *btrfs_alloc_delayed_item(u32 data_len) 31016cdcec7SMiao Xie { 31116cdcec7SMiao Xie struct btrfs_delayed_item *item; 31216cdcec7SMiao Xie item = kmalloc(sizeof(*item) + data_len, GFP_NOFS); 31316cdcec7SMiao Xie if (item) { 31416cdcec7SMiao Xie item->data_len = data_len; 31516cdcec7SMiao Xie item->ins_or_del = 0; 31616cdcec7SMiao Xie item->bytes_reserved = 0; 31716cdcec7SMiao Xie item->delayed_node = NULL; 31816cdcec7SMiao Xie atomic_set(&item->refs, 1); 31916cdcec7SMiao Xie } 32016cdcec7SMiao Xie return item; 32116cdcec7SMiao Xie } 32216cdcec7SMiao Xie 32316cdcec7SMiao Xie /* 32416cdcec7SMiao Xie * __btrfs_lookup_delayed_item - look up the delayed item by key 32516cdcec7SMiao Xie * @delayed_node: pointer to the delayed node 32616cdcec7SMiao Xie * @key: the key to look up 32716cdcec7SMiao Xie * @prev: used to store the prev item if the right item isn't found 32816cdcec7SMiao Xie * @next: used to store the next item if the right item isn't found 32916cdcec7SMiao Xie * 33016cdcec7SMiao Xie * Note: if we don't find the right item, we will return the prev item and 33116cdcec7SMiao Xie * the next item. 33216cdcec7SMiao Xie */ 33316cdcec7SMiao Xie static struct btrfs_delayed_item *__btrfs_lookup_delayed_item( 33416cdcec7SMiao Xie struct rb_root *root, 33516cdcec7SMiao Xie struct btrfs_key *key, 33616cdcec7SMiao Xie struct btrfs_delayed_item **prev, 33716cdcec7SMiao Xie struct btrfs_delayed_item **next) 33816cdcec7SMiao Xie { 33916cdcec7SMiao Xie struct rb_node *node, *prev_node = NULL; 34016cdcec7SMiao Xie struct btrfs_delayed_item *delayed_item = NULL; 34116cdcec7SMiao Xie int ret = 0; 34216cdcec7SMiao Xie 34316cdcec7SMiao Xie node = root->rb_node; 34416cdcec7SMiao Xie 34516cdcec7SMiao Xie while (node) { 34616cdcec7SMiao Xie delayed_item = rb_entry(node, struct btrfs_delayed_item, 34716cdcec7SMiao Xie rb_node); 34816cdcec7SMiao Xie prev_node = node; 34916cdcec7SMiao Xie ret = btrfs_comp_cpu_keys(&delayed_item->key, key); 35016cdcec7SMiao Xie if (ret < 0) 35116cdcec7SMiao Xie node = node->rb_right; 35216cdcec7SMiao Xie else if (ret > 0) 35316cdcec7SMiao Xie node = node->rb_left; 35416cdcec7SMiao Xie else 35516cdcec7SMiao Xie return delayed_item; 35616cdcec7SMiao Xie } 35716cdcec7SMiao Xie 35816cdcec7SMiao Xie if (prev) { 35916cdcec7SMiao Xie if (!prev_node) 36016cdcec7SMiao Xie *prev = NULL; 36116cdcec7SMiao Xie else if (ret < 0) 36216cdcec7SMiao Xie *prev = delayed_item; 36316cdcec7SMiao Xie else if ((node = rb_prev(prev_node)) != NULL) { 36416cdcec7SMiao Xie *prev = rb_entry(node, struct btrfs_delayed_item, 36516cdcec7SMiao Xie rb_node); 36616cdcec7SMiao Xie } else 36716cdcec7SMiao Xie *prev = NULL; 36816cdcec7SMiao Xie } 36916cdcec7SMiao Xie 37016cdcec7SMiao Xie if (next) { 37116cdcec7SMiao Xie if (!prev_node) 37216cdcec7SMiao Xie *next = NULL; 37316cdcec7SMiao Xie else if (ret > 0) 37416cdcec7SMiao Xie *next = delayed_item; 37516cdcec7SMiao Xie else if ((node = rb_next(prev_node)) != NULL) { 37616cdcec7SMiao Xie *next = rb_entry(node, struct btrfs_delayed_item, 37716cdcec7SMiao Xie rb_node); 37816cdcec7SMiao Xie } else 37916cdcec7SMiao Xie *next = NULL; 38016cdcec7SMiao Xie } 38116cdcec7SMiao Xie return NULL; 38216cdcec7SMiao Xie } 38316cdcec7SMiao Xie 38448a3b636SEric Sandeen static struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item( 38516cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node, 38616cdcec7SMiao Xie struct btrfs_key *key) 38716cdcec7SMiao Xie { 388e2c89907SMasahiro Yamada return __btrfs_lookup_delayed_item(&delayed_node->ins_root, key, 38916cdcec7SMiao Xie NULL, NULL); 39016cdcec7SMiao Xie } 39116cdcec7SMiao Xie 39216cdcec7SMiao Xie static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node, 39316cdcec7SMiao Xie struct btrfs_delayed_item *ins, 39416cdcec7SMiao Xie int action) 39516cdcec7SMiao Xie { 39616cdcec7SMiao Xie struct rb_node **p, *node; 39716cdcec7SMiao Xie struct rb_node *parent_node = NULL; 39816cdcec7SMiao Xie struct rb_root *root; 39916cdcec7SMiao Xie struct btrfs_delayed_item *item; 40016cdcec7SMiao Xie int cmp; 40116cdcec7SMiao Xie 40216cdcec7SMiao Xie if (action == BTRFS_DELAYED_INSERTION_ITEM) 40316cdcec7SMiao Xie root = &delayed_node->ins_root; 40416cdcec7SMiao Xie else if (action == BTRFS_DELAYED_DELETION_ITEM) 40516cdcec7SMiao Xie root = &delayed_node->del_root; 40616cdcec7SMiao Xie else 40716cdcec7SMiao Xie BUG(); 40816cdcec7SMiao Xie p = &root->rb_node; 40916cdcec7SMiao Xie node = &ins->rb_node; 41016cdcec7SMiao Xie 41116cdcec7SMiao Xie while (*p) { 41216cdcec7SMiao Xie parent_node = *p; 41316cdcec7SMiao Xie item = rb_entry(parent_node, struct btrfs_delayed_item, 41416cdcec7SMiao Xie rb_node); 41516cdcec7SMiao Xie 41616cdcec7SMiao Xie cmp = btrfs_comp_cpu_keys(&item->key, &ins->key); 41716cdcec7SMiao Xie if (cmp < 0) 41816cdcec7SMiao Xie p = &(*p)->rb_right; 41916cdcec7SMiao Xie else if (cmp > 0) 42016cdcec7SMiao Xie p = &(*p)->rb_left; 42116cdcec7SMiao Xie else 42216cdcec7SMiao Xie return -EEXIST; 42316cdcec7SMiao Xie } 42416cdcec7SMiao Xie 42516cdcec7SMiao Xie rb_link_node(node, parent_node, p); 42616cdcec7SMiao Xie rb_insert_color(node, root); 42716cdcec7SMiao Xie ins->delayed_node = delayed_node; 42816cdcec7SMiao Xie ins->ins_or_del = action; 42916cdcec7SMiao Xie 43016cdcec7SMiao Xie if (ins->key.type == BTRFS_DIR_INDEX_KEY && 43116cdcec7SMiao Xie action == BTRFS_DELAYED_INSERTION_ITEM && 43216cdcec7SMiao Xie ins->key.offset >= delayed_node->index_cnt) 43316cdcec7SMiao Xie delayed_node->index_cnt = ins->key.offset + 1; 43416cdcec7SMiao Xie 43516cdcec7SMiao Xie delayed_node->count++; 43616cdcec7SMiao Xie atomic_inc(&delayed_node->root->fs_info->delayed_root->items); 43716cdcec7SMiao Xie return 0; 43816cdcec7SMiao Xie } 43916cdcec7SMiao Xie 44016cdcec7SMiao Xie static int __btrfs_add_delayed_insertion_item(struct btrfs_delayed_node *node, 44116cdcec7SMiao Xie struct btrfs_delayed_item *item) 44216cdcec7SMiao Xie { 44316cdcec7SMiao Xie return __btrfs_add_delayed_item(node, item, 44416cdcec7SMiao Xie BTRFS_DELAYED_INSERTION_ITEM); 44516cdcec7SMiao Xie } 44616cdcec7SMiao Xie 44716cdcec7SMiao Xie static int __btrfs_add_delayed_deletion_item(struct btrfs_delayed_node *node, 44816cdcec7SMiao Xie struct btrfs_delayed_item *item) 44916cdcec7SMiao Xie { 45016cdcec7SMiao Xie return __btrfs_add_delayed_item(node, item, 45116cdcec7SMiao Xie BTRFS_DELAYED_DELETION_ITEM); 45216cdcec7SMiao Xie } 45316cdcec7SMiao Xie 454de3cb945SChris Mason static void finish_one_item(struct btrfs_delayed_root *delayed_root) 455de3cb945SChris Mason { 456de3cb945SChris Mason int seq = atomic_inc_return(&delayed_root->items_seq); 457ee863954SDavid Sterba 458ee863954SDavid Sterba /* 459ee863954SDavid Sterba * atomic_dec_return implies a barrier for waitqueue_active 460ee863954SDavid Sterba */ 461de3cb945SChris Mason if ((atomic_dec_return(&delayed_root->items) < 462de3cb945SChris Mason BTRFS_DELAYED_BACKGROUND || seq % BTRFS_DELAYED_BATCH == 0) && 463de3cb945SChris Mason waitqueue_active(&delayed_root->wait)) 464de3cb945SChris Mason wake_up(&delayed_root->wait); 465de3cb945SChris Mason } 466de3cb945SChris Mason 46716cdcec7SMiao Xie static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item) 46816cdcec7SMiao Xie { 46916cdcec7SMiao Xie struct rb_root *root; 47016cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 47116cdcec7SMiao Xie 47216cdcec7SMiao Xie delayed_root = delayed_item->delayed_node->root->fs_info->delayed_root; 47316cdcec7SMiao Xie 47416cdcec7SMiao Xie BUG_ON(!delayed_root); 47516cdcec7SMiao Xie BUG_ON(delayed_item->ins_or_del != BTRFS_DELAYED_DELETION_ITEM && 47616cdcec7SMiao Xie delayed_item->ins_or_del != BTRFS_DELAYED_INSERTION_ITEM); 47716cdcec7SMiao Xie 47816cdcec7SMiao Xie if (delayed_item->ins_or_del == BTRFS_DELAYED_INSERTION_ITEM) 47916cdcec7SMiao Xie root = &delayed_item->delayed_node->ins_root; 48016cdcec7SMiao Xie else 48116cdcec7SMiao Xie root = &delayed_item->delayed_node->del_root; 48216cdcec7SMiao Xie 48316cdcec7SMiao Xie rb_erase(&delayed_item->rb_node, root); 48416cdcec7SMiao Xie delayed_item->delayed_node->count--; 485de3cb945SChris Mason 486de3cb945SChris Mason finish_one_item(delayed_root); 48716cdcec7SMiao Xie } 48816cdcec7SMiao Xie 48916cdcec7SMiao Xie static void btrfs_release_delayed_item(struct btrfs_delayed_item *item) 49016cdcec7SMiao Xie { 49116cdcec7SMiao Xie if (item) { 49216cdcec7SMiao Xie __btrfs_remove_delayed_item(item); 49316cdcec7SMiao Xie if (atomic_dec_and_test(&item->refs)) 49416cdcec7SMiao Xie kfree(item); 49516cdcec7SMiao Xie } 49616cdcec7SMiao Xie } 49716cdcec7SMiao Xie 49848a3b636SEric Sandeen static struct btrfs_delayed_item *__btrfs_first_delayed_insertion_item( 49916cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node) 50016cdcec7SMiao Xie { 50116cdcec7SMiao Xie struct rb_node *p; 50216cdcec7SMiao Xie struct btrfs_delayed_item *item = NULL; 50316cdcec7SMiao Xie 50416cdcec7SMiao Xie p = rb_first(&delayed_node->ins_root); 50516cdcec7SMiao Xie if (p) 50616cdcec7SMiao Xie item = rb_entry(p, struct btrfs_delayed_item, rb_node); 50716cdcec7SMiao Xie 50816cdcec7SMiao Xie return item; 50916cdcec7SMiao Xie } 51016cdcec7SMiao Xie 51148a3b636SEric Sandeen static struct btrfs_delayed_item *__btrfs_first_delayed_deletion_item( 51216cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node) 51316cdcec7SMiao Xie { 51416cdcec7SMiao Xie struct rb_node *p; 51516cdcec7SMiao Xie struct btrfs_delayed_item *item = NULL; 51616cdcec7SMiao Xie 51716cdcec7SMiao Xie p = rb_first(&delayed_node->del_root); 51816cdcec7SMiao Xie if (p) 51916cdcec7SMiao Xie item = rb_entry(p, struct btrfs_delayed_item, rb_node); 52016cdcec7SMiao Xie 52116cdcec7SMiao Xie return item; 52216cdcec7SMiao Xie } 52316cdcec7SMiao Xie 52448a3b636SEric Sandeen static struct btrfs_delayed_item *__btrfs_next_delayed_item( 52516cdcec7SMiao Xie struct btrfs_delayed_item *item) 52616cdcec7SMiao Xie { 52716cdcec7SMiao Xie struct rb_node *p; 52816cdcec7SMiao Xie struct btrfs_delayed_item *next = NULL; 52916cdcec7SMiao Xie 53016cdcec7SMiao Xie p = rb_next(&item->rb_node); 53116cdcec7SMiao Xie if (p) 53216cdcec7SMiao Xie next = rb_entry(p, struct btrfs_delayed_item, rb_node); 53316cdcec7SMiao Xie 53416cdcec7SMiao Xie return next; 53516cdcec7SMiao Xie } 53616cdcec7SMiao Xie 53716cdcec7SMiao Xie static int btrfs_delayed_item_reserve_metadata(struct btrfs_trans_handle *trans, 53816cdcec7SMiao Xie struct btrfs_root *root, 53916cdcec7SMiao Xie struct btrfs_delayed_item *item) 54016cdcec7SMiao Xie { 54116cdcec7SMiao Xie struct btrfs_block_rsv *src_rsv; 54216cdcec7SMiao Xie struct btrfs_block_rsv *dst_rsv; 54316cdcec7SMiao Xie u64 num_bytes; 54416cdcec7SMiao Xie int ret; 54516cdcec7SMiao Xie 54616cdcec7SMiao Xie if (!trans->bytes_reserved) 54716cdcec7SMiao Xie return 0; 54816cdcec7SMiao Xie 54916cdcec7SMiao Xie src_rsv = trans->block_rsv; 5506d668ddaSJosef Bacik dst_rsv = &root->fs_info->delayed_block_rsv; 55116cdcec7SMiao Xie 55216cdcec7SMiao Xie num_bytes = btrfs_calc_trans_metadata_size(root, 1); 55325d609f8SJosef Bacik ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, 1); 5548c2a3ca2SJosef Bacik if (!ret) { 5558c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delayed_item", 5568c2a3ca2SJosef Bacik item->key.objectid, 5578c2a3ca2SJosef Bacik num_bytes, 1); 55816cdcec7SMiao Xie item->bytes_reserved = num_bytes; 5598c2a3ca2SJosef Bacik } 56016cdcec7SMiao Xie 56116cdcec7SMiao Xie return ret; 56216cdcec7SMiao Xie } 56316cdcec7SMiao Xie 56416cdcec7SMiao Xie static void btrfs_delayed_item_release_metadata(struct btrfs_root *root, 56516cdcec7SMiao Xie struct btrfs_delayed_item *item) 56616cdcec7SMiao Xie { 56719fd2949SMiao Xie struct btrfs_block_rsv *rsv; 56819fd2949SMiao Xie 56916cdcec7SMiao Xie if (!item->bytes_reserved) 57016cdcec7SMiao Xie return; 57116cdcec7SMiao Xie 5726d668ddaSJosef Bacik rsv = &root->fs_info->delayed_block_rsv; 5738c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delayed_item", 5748c2a3ca2SJosef Bacik item->key.objectid, item->bytes_reserved, 5758c2a3ca2SJosef Bacik 0); 57619fd2949SMiao Xie btrfs_block_rsv_release(root, rsv, 57716cdcec7SMiao Xie item->bytes_reserved); 57816cdcec7SMiao Xie } 57916cdcec7SMiao Xie 58016cdcec7SMiao Xie static int btrfs_delayed_inode_reserve_metadata( 58116cdcec7SMiao Xie struct btrfs_trans_handle *trans, 58216cdcec7SMiao Xie struct btrfs_root *root, 5837fd2ae21SJosef Bacik struct inode *inode, 58416cdcec7SMiao Xie struct btrfs_delayed_node *node) 58516cdcec7SMiao Xie { 58616cdcec7SMiao Xie struct btrfs_block_rsv *src_rsv; 58716cdcec7SMiao Xie struct btrfs_block_rsv *dst_rsv; 58816cdcec7SMiao Xie u64 num_bytes; 58916cdcec7SMiao Xie int ret; 5908c2a3ca2SJosef Bacik bool release = false; 59116cdcec7SMiao Xie 59216cdcec7SMiao Xie src_rsv = trans->block_rsv; 5936d668ddaSJosef Bacik dst_rsv = &root->fs_info->delayed_block_rsv; 59416cdcec7SMiao Xie 59516cdcec7SMiao Xie num_bytes = btrfs_calc_trans_metadata_size(root, 1); 596c06a0e12SJosef Bacik 597c06a0e12SJosef Bacik /* 598c48f49d6SJosef Bacik * If our block_rsv is the delalloc block reserve then check and see if 599c48f49d6SJosef Bacik * we have our extra reservation for updating the inode. If not fall 600c48f49d6SJosef Bacik * through and try to reserve space quickly. 601c48f49d6SJosef Bacik * 602c48f49d6SJosef Bacik * We used to try and steal from the delalloc block rsv or the global 603c48f49d6SJosef Bacik * reserve, but we'd steal a full reservation, which isn't kind. We are 604c48f49d6SJosef Bacik * here through delalloc which means we've likely just cowed down close 605c48f49d6SJosef Bacik * to the leaf that contains the inode, so we would steal less just 606c48f49d6SJosef Bacik * doing the fallback inode update, so if we do end up having to steal 607c48f49d6SJosef Bacik * from the global block rsv we hopefully only steal one or two blocks 608c48f49d6SJosef Bacik * worth which is less likely to hurt us. 609c48f49d6SJosef Bacik */ 610c48f49d6SJosef Bacik if (src_rsv && src_rsv->type == BTRFS_BLOCK_RSV_DELALLOC) { 611c48f49d6SJosef Bacik spin_lock(&BTRFS_I(inode)->lock); 612c48f49d6SJosef Bacik if (test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED, 613c48f49d6SJosef Bacik &BTRFS_I(inode)->runtime_flags)) 614c48f49d6SJosef Bacik release = true; 615c48f49d6SJosef Bacik else 616c48f49d6SJosef Bacik src_rsv = NULL; 617c48f49d6SJosef Bacik spin_unlock(&BTRFS_I(inode)->lock); 618c48f49d6SJosef Bacik } 619c48f49d6SJosef Bacik 620c48f49d6SJosef Bacik /* 621c06a0e12SJosef Bacik * btrfs_dirty_inode will update the inode under btrfs_join_transaction 622c06a0e12SJosef Bacik * which doesn't reserve space for speed. This is a problem since we 623c06a0e12SJosef Bacik * still need to reserve space for this update, so try to reserve the 624c06a0e12SJosef Bacik * space. 625c06a0e12SJosef Bacik * 626c06a0e12SJosef Bacik * Now if src_rsv == delalloc_block_rsv we'll let it just steal since 627c06a0e12SJosef Bacik * we're accounted for. 628c06a0e12SJosef Bacik */ 629e755d9abSChris Mason if (!src_rsv || (!trans->bytes_reserved && 63066d8f3ddSMiao Xie src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) { 63108e007d2SMiao Xie ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes, 63208e007d2SMiao Xie BTRFS_RESERVE_NO_FLUSH); 633c06a0e12SJosef Bacik /* 634c06a0e12SJosef Bacik * Since we're under a transaction reserve_metadata_bytes could 635c06a0e12SJosef Bacik * try to commit the transaction which will make it return 636c06a0e12SJosef Bacik * EAGAIN to make us stop the transaction we have, so return 637c06a0e12SJosef Bacik * ENOSPC instead so that btrfs_dirty_inode knows what to do. 638c06a0e12SJosef Bacik */ 639c06a0e12SJosef Bacik if (ret == -EAGAIN) 640c06a0e12SJosef Bacik ret = -ENOSPC; 6418c2a3ca2SJosef Bacik if (!ret) { 642c06a0e12SJosef Bacik node->bytes_reserved = num_bytes; 6438c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, 6448c2a3ca2SJosef Bacik "delayed_inode", 6458c2a3ca2SJosef Bacik btrfs_ino(inode), 6468c2a3ca2SJosef Bacik num_bytes, 1); 6478c2a3ca2SJosef Bacik } 648c06a0e12SJosef Bacik return ret; 649c06a0e12SJosef Bacik } 650c06a0e12SJosef Bacik 65125d609f8SJosef Bacik ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, 1); 6527fd2ae21SJosef Bacik 6537fd2ae21SJosef Bacik /* 6547fd2ae21SJosef Bacik * Migrate only takes a reservation, it doesn't touch the size of the 6557fd2ae21SJosef Bacik * block_rsv. This is to simplify people who don't normally have things 6567fd2ae21SJosef Bacik * migrated from their block rsv. If they go to release their 6577fd2ae21SJosef Bacik * reservation, that will decrease the size as well, so if migrate 6587fd2ae21SJosef Bacik * reduced size we'd end up with a negative size. But for the 6597fd2ae21SJosef Bacik * delalloc_meta_reserved stuff we will only know to drop 1 reservation, 6607fd2ae21SJosef Bacik * but we could in fact do this reserve/migrate dance several times 6617fd2ae21SJosef Bacik * between the time we did the original reservation and we'd clean it 6627fd2ae21SJosef Bacik * up. So to take care of this, release the space for the meta 6637fd2ae21SJosef Bacik * reservation here. I think it may be time for a documentation page on 6647fd2ae21SJosef Bacik * how block rsvs. work. 6657fd2ae21SJosef Bacik */ 6668c2a3ca2SJosef Bacik if (!ret) { 6678c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delayed_inode", 6688c2a3ca2SJosef Bacik btrfs_ino(inode), num_bytes, 1); 66916cdcec7SMiao Xie node->bytes_reserved = num_bytes; 6708c2a3ca2SJosef Bacik } 67116cdcec7SMiao Xie 6728c2a3ca2SJosef Bacik if (release) { 6738c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delalloc", 6748c2a3ca2SJosef Bacik btrfs_ino(inode), num_bytes, 0); 6757fd2ae21SJosef Bacik btrfs_block_rsv_release(root, src_rsv, num_bytes); 6768c2a3ca2SJosef Bacik } 67716cdcec7SMiao Xie 67816cdcec7SMiao Xie return ret; 67916cdcec7SMiao Xie } 68016cdcec7SMiao Xie 68116cdcec7SMiao Xie static void btrfs_delayed_inode_release_metadata(struct btrfs_root *root, 68216cdcec7SMiao Xie struct btrfs_delayed_node *node) 68316cdcec7SMiao Xie { 68416cdcec7SMiao Xie struct btrfs_block_rsv *rsv; 68516cdcec7SMiao Xie 68616cdcec7SMiao Xie if (!node->bytes_reserved) 68716cdcec7SMiao Xie return; 68816cdcec7SMiao Xie 6896d668ddaSJosef Bacik rsv = &root->fs_info->delayed_block_rsv; 6908c2a3ca2SJosef Bacik trace_btrfs_space_reservation(root->fs_info, "delayed_inode", 6918c2a3ca2SJosef Bacik node->inode_id, node->bytes_reserved, 0); 69216cdcec7SMiao Xie btrfs_block_rsv_release(root, rsv, 69316cdcec7SMiao Xie node->bytes_reserved); 69416cdcec7SMiao Xie node->bytes_reserved = 0; 69516cdcec7SMiao Xie } 69616cdcec7SMiao Xie 69716cdcec7SMiao Xie /* 69816cdcec7SMiao Xie * This helper will insert some continuous items into the same leaf according 69916cdcec7SMiao Xie * to the free space of the leaf. 70016cdcec7SMiao Xie */ 701afe5fea7STsutomu Itoh static int btrfs_batch_insert_items(struct btrfs_root *root, 70216cdcec7SMiao Xie struct btrfs_path *path, 70316cdcec7SMiao Xie struct btrfs_delayed_item *item) 70416cdcec7SMiao Xie { 70516cdcec7SMiao Xie struct btrfs_delayed_item *curr, *next; 70616cdcec7SMiao Xie int free_space; 70716cdcec7SMiao Xie int total_data_size = 0, total_size = 0; 70816cdcec7SMiao Xie struct extent_buffer *leaf; 70916cdcec7SMiao Xie char *data_ptr; 71016cdcec7SMiao Xie struct btrfs_key *keys; 71116cdcec7SMiao Xie u32 *data_size; 71216cdcec7SMiao Xie struct list_head head; 71316cdcec7SMiao Xie int slot; 71416cdcec7SMiao Xie int nitems; 71516cdcec7SMiao Xie int i; 71616cdcec7SMiao Xie int ret = 0; 71716cdcec7SMiao Xie 71816cdcec7SMiao Xie BUG_ON(!path->nodes[0]); 71916cdcec7SMiao Xie 72016cdcec7SMiao Xie leaf = path->nodes[0]; 72116cdcec7SMiao Xie free_space = btrfs_leaf_free_space(root, leaf); 72216cdcec7SMiao Xie INIT_LIST_HEAD(&head); 72316cdcec7SMiao Xie 72416cdcec7SMiao Xie next = item; 72517aca1c9SChris Mason nitems = 0; 72616cdcec7SMiao Xie 72716cdcec7SMiao Xie /* 72816cdcec7SMiao Xie * count the number of the continuous items that we can insert in batch 72916cdcec7SMiao Xie */ 73016cdcec7SMiao Xie while (total_size + next->data_len + sizeof(struct btrfs_item) <= 73116cdcec7SMiao Xie free_space) { 73216cdcec7SMiao Xie total_data_size += next->data_len; 73316cdcec7SMiao Xie total_size += next->data_len + sizeof(struct btrfs_item); 73416cdcec7SMiao Xie list_add_tail(&next->tree_list, &head); 73516cdcec7SMiao Xie nitems++; 73616cdcec7SMiao Xie 73716cdcec7SMiao Xie curr = next; 73816cdcec7SMiao Xie next = __btrfs_next_delayed_item(curr); 73916cdcec7SMiao Xie if (!next) 74016cdcec7SMiao Xie break; 74116cdcec7SMiao Xie 74216cdcec7SMiao Xie if (!btrfs_is_continuous_delayed_item(curr, next)) 74316cdcec7SMiao Xie break; 74416cdcec7SMiao Xie } 74516cdcec7SMiao Xie 74616cdcec7SMiao Xie if (!nitems) { 74716cdcec7SMiao Xie ret = 0; 74816cdcec7SMiao Xie goto out; 74916cdcec7SMiao Xie } 75016cdcec7SMiao Xie 75116cdcec7SMiao Xie /* 75216cdcec7SMiao Xie * we need allocate some memory space, but it might cause the task 75316cdcec7SMiao Xie * to sleep, so we set all locked nodes in the path to blocking locks 75416cdcec7SMiao Xie * first. 75516cdcec7SMiao Xie */ 75616cdcec7SMiao Xie btrfs_set_path_blocking(path); 75716cdcec7SMiao Xie 758d9b0d9baSDulshani Gunawardhana keys = kmalloc_array(nitems, sizeof(struct btrfs_key), GFP_NOFS); 75916cdcec7SMiao Xie if (!keys) { 76016cdcec7SMiao Xie ret = -ENOMEM; 76116cdcec7SMiao Xie goto out; 76216cdcec7SMiao Xie } 76316cdcec7SMiao Xie 764d9b0d9baSDulshani Gunawardhana data_size = kmalloc_array(nitems, sizeof(u32), GFP_NOFS); 76516cdcec7SMiao Xie if (!data_size) { 76616cdcec7SMiao Xie ret = -ENOMEM; 76716cdcec7SMiao Xie goto error; 76816cdcec7SMiao Xie } 76916cdcec7SMiao Xie 77016cdcec7SMiao Xie /* get keys of all the delayed items */ 77116cdcec7SMiao Xie i = 0; 77216cdcec7SMiao Xie list_for_each_entry(next, &head, tree_list) { 77316cdcec7SMiao Xie keys[i] = next->key; 77416cdcec7SMiao Xie data_size[i] = next->data_len; 77516cdcec7SMiao Xie i++; 77616cdcec7SMiao Xie } 77716cdcec7SMiao Xie 77816cdcec7SMiao Xie /* reset all the locked nodes in the patch to spinning locks. */ 779bd681513SChris Mason btrfs_clear_path_blocking(path, NULL, 0); 78016cdcec7SMiao Xie 78116cdcec7SMiao Xie /* insert the keys of the items */ 782afe5fea7STsutomu Itoh setup_items_for_insert(root, path, keys, data_size, 78316cdcec7SMiao Xie total_data_size, total_size, nitems); 78416cdcec7SMiao Xie 78516cdcec7SMiao Xie /* insert the dir index items */ 78616cdcec7SMiao Xie slot = path->slots[0]; 78716cdcec7SMiao Xie list_for_each_entry_safe(curr, next, &head, tree_list) { 78816cdcec7SMiao Xie data_ptr = btrfs_item_ptr(leaf, slot, char); 78916cdcec7SMiao Xie write_extent_buffer(leaf, &curr->data, 79016cdcec7SMiao Xie (unsigned long)data_ptr, 79116cdcec7SMiao Xie curr->data_len); 79216cdcec7SMiao Xie slot++; 79316cdcec7SMiao Xie 79416cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, curr); 79516cdcec7SMiao Xie 79616cdcec7SMiao Xie list_del(&curr->tree_list); 79716cdcec7SMiao Xie btrfs_release_delayed_item(curr); 79816cdcec7SMiao Xie } 79916cdcec7SMiao Xie 80016cdcec7SMiao Xie error: 80116cdcec7SMiao Xie kfree(data_size); 80216cdcec7SMiao Xie kfree(keys); 80316cdcec7SMiao Xie out: 80416cdcec7SMiao Xie return ret; 80516cdcec7SMiao Xie } 80616cdcec7SMiao Xie 80716cdcec7SMiao Xie /* 80816cdcec7SMiao Xie * This helper can just do simple insertion that needn't extend item for new 80916cdcec7SMiao Xie * data, such as directory name index insertion, inode insertion. 81016cdcec7SMiao Xie */ 81116cdcec7SMiao Xie static int btrfs_insert_delayed_item(struct btrfs_trans_handle *trans, 81216cdcec7SMiao Xie struct btrfs_root *root, 81316cdcec7SMiao Xie struct btrfs_path *path, 81416cdcec7SMiao Xie struct btrfs_delayed_item *delayed_item) 81516cdcec7SMiao Xie { 81616cdcec7SMiao Xie struct extent_buffer *leaf; 81716cdcec7SMiao Xie char *ptr; 81816cdcec7SMiao Xie int ret; 81916cdcec7SMiao Xie 82016cdcec7SMiao Xie ret = btrfs_insert_empty_item(trans, root, path, &delayed_item->key, 82116cdcec7SMiao Xie delayed_item->data_len); 82216cdcec7SMiao Xie if (ret < 0 && ret != -EEXIST) 82316cdcec7SMiao Xie return ret; 82416cdcec7SMiao Xie 82516cdcec7SMiao Xie leaf = path->nodes[0]; 82616cdcec7SMiao Xie 82716cdcec7SMiao Xie ptr = btrfs_item_ptr(leaf, path->slots[0], char); 82816cdcec7SMiao Xie 82916cdcec7SMiao Xie write_extent_buffer(leaf, delayed_item->data, (unsigned long)ptr, 83016cdcec7SMiao Xie delayed_item->data_len); 83116cdcec7SMiao Xie btrfs_mark_buffer_dirty(leaf); 83216cdcec7SMiao Xie 83316cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, delayed_item); 83416cdcec7SMiao Xie return 0; 83516cdcec7SMiao Xie } 83616cdcec7SMiao Xie 83716cdcec7SMiao Xie /* 83816cdcec7SMiao Xie * we insert an item first, then if there are some continuous items, we try 83916cdcec7SMiao Xie * to insert those items into the same leaf. 84016cdcec7SMiao Xie */ 84116cdcec7SMiao Xie static int btrfs_insert_delayed_items(struct btrfs_trans_handle *trans, 84216cdcec7SMiao Xie struct btrfs_path *path, 84316cdcec7SMiao Xie struct btrfs_root *root, 84416cdcec7SMiao Xie struct btrfs_delayed_node *node) 84516cdcec7SMiao Xie { 84616cdcec7SMiao Xie struct btrfs_delayed_item *curr, *prev; 84716cdcec7SMiao Xie int ret = 0; 84816cdcec7SMiao Xie 84916cdcec7SMiao Xie do_again: 85016cdcec7SMiao Xie mutex_lock(&node->mutex); 85116cdcec7SMiao Xie curr = __btrfs_first_delayed_insertion_item(node); 85216cdcec7SMiao Xie if (!curr) 85316cdcec7SMiao Xie goto insert_end; 85416cdcec7SMiao Xie 85516cdcec7SMiao Xie ret = btrfs_insert_delayed_item(trans, root, path, curr); 85616cdcec7SMiao Xie if (ret < 0) { 857945d8962SChris Mason btrfs_release_path(path); 85816cdcec7SMiao Xie goto insert_end; 85916cdcec7SMiao Xie } 86016cdcec7SMiao Xie 86116cdcec7SMiao Xie prev = curr; 86216cdcec7SMiao Xie curr = __btrfs_next_delayed_item(prev); 86316cdcec7SMiao Xie if (curr && btrfs_is_continuous_delayed_item(prev, curr)) { 86416cdcec7SMiao Xie /* insert the continuous items into the same leaf */ 86516cdcec7SMiao Xie path->slots[0]++; 866afe5fea7STsutomu Itoh btrfs_batch_insert_items(root, path, curr); 86716cdcec7SMiao Xie } 86816cdcec7SMiao Xie btrfs_release_delayed_item(prev); 86916cdcec7SMiao Xie btrfs_mark_buffer_dirty(path->nodes[0]); 87016cdcec7SMiao Xie 871945d8962SChris Mason btrfs_release_path(path); 87216cdcec7SMiao Xie mutex_unlock(&node->mutex); 87316cdcec7SMiao Xie goto do_again; 87416cdcec7SMiao Xie 87516cdcec7SMiao Xie insert_end: 87616cdcec7SMiao Xie mutex_unlock(&node->mutex); 87716cdcec7SMiao Xie return ret; 87816cdcec7SMiao Xie } 87916cdcec7SMiao Xie 88016cdcec7SMiao Xie static int btrfs_batch_delete_items(struct btrfs_trans_handle *trans, 88116cdcec7SMiao Xie struct btrfs_root *root, 88216cdcec7SMiao Xie struct btrfs_path *path, 88316cdcec7SMiao Xie struct btrfs_delayed_item *item) 88416cdcec7SMiao Xie { 88516cdcec7SMiao Xie struct btrfs_delayed_item *curr, *next; 88616cdcec7SMiao Xie struct extent_buffer *leaf; 88716cdcec7SMiao Xie struct btrfs_key key; 88816cdcec7SMiao Xie struct list_head head; 88916cdcec7SMiao Xie int nitems, i, last_item; 89016cdcec7SMiao Xie int ret = 0; 89116cdcec7SMiao Xie 89216cdcec7SMiao Xie BUG_ON(!path->nodes[0]); 89316cdcec7SMiao Xie 89416cdcec7SMiao Xie leaf = path->nodes[0]; 89516cdcec7SMiao Xie 89616cdcec7SMiao Xie i = path->slots[0]; 89716cdcec7SMiao Xie last_item = btrfs_header_nritems(leaf) - 1; 89816cdcec7SMiao Xie if (i > last_item) 89916cdcec7SMiao Xie return -ENOENT; /* FIXME: Is errno suitable? */ 90016cdcec7SMiao Xie 90116cdcec7SMiao Xie next = item; 90216cdcec7SMiao Xie INIT_LIST_HEAD(&head); 90316cdcec7SMiao Xie btrfs_item_key_to_cpu(leaf, &key, i); 90416cdcec7SMiao Xie nitems = 0; 90516cdcec7SMiao Xie /* 90616cdcec7SMiao Xie * count the number of the dir index items that we can delete in batch 90716cdcec7SMiao Xie */ 90816cdcec7SMiao Xie while (btrfs_comp_cpu_keys(&next->key, &key) == 0) { 90916cdcec7SMiao Xie list_add_tail(&next->tree_list, &head); 91016cdcec7SMiao Xie nitems++; 91116cdcec7SMiao Xie 91216cdcec7SMiao Xie curr = next; 91316cdcec7SMiao Xie next = __btrfs_next_delayed_item(curr); 91416cdcec7SMiao Xie if (!next) 91516cdcec7SMiao Xie break; 91616cdcec7SMiao Xie 91716cdcec7SMiao Xie if (!btrfs_is_continuous_delayed_item(curr, next)) 91816cdcec7SMiao Xie break; 91916cdcec7SMiao Xie 92016cdcec7SMiao Xie i++; 92116cdcec7SMiao Xie if (i > last_item) 92216cdcec7SMiao Xie break; 92316cdcec7SMiao Xie btrfs_item_key_to_cpu(leaf, &key, i); 92416cdcec7SMiao Xie } 92516cdcec7SMiao Xie 92616cdcec7SMiao Xie if (!nitems) 92716cdcec7SMiao Xie return 0; 92816cdcec7SMiao Xie 92916cdcec7SMiao Xie ret = btrfs_del_items(trans, root, path, path->slots[0], nitems); 93016cdcec7SMiao Xie if (ret) 93116cdcec7SMiao Xie goto out; 93216cdcec7SMiao Xie 93316cdcec7SMiao Xie list_for_each_entry_safe(curr, next, &head, tree_list) { 93416cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, curr); 93516cdcec7SMiao Xie list_del(&curr->tree_list); 93616cdcec7SMiao Xie btrfs_release_delayed_item(curr); 93716cdcec7SMiao Xie } 93816cdcec7SMiao Xie 93916cdcec7SMiao Xie out: 94016cdcec7SMiao Xie return ret; 94116cdcec7SMiao Xie } 94216cdcec7SMiao Xie 94316cdcec7SMiao Xie static int btrfs_delete_delayed_items(struct btrfs_trans_handle *trans, 94416cdcec7SMiao Xie struct btrfs_path *path, 94516cdcec7SMiao Xie struct btrfs_root *root, 94616cdcec7SMiao Xie struct btrfs_delayed_node *node) 94716cdcec7SMiao Xie { 94816cdcec7SMiao Xie struct btrfs_delayed_item *curr, *prev; 94916cdcec7SMiao Xie int ret = 0; 95016cdcec7SMiao Xie 95116cdcec7SMiao Xie do_again: 95216cdcec7SMiao Xie mutex_lock(&node->mutex); 95316cdcec7SMiao Xie curr = __btrfs_first_delayed_deletion_item(node); 95416cdcec7SMiao Xie if (!curr) 95516cdcec7SMiao Xie goto delete_fail; 95616cdcec7SMiao Xie 95716cdcec7SMiao Xie ret = btrfs_search_slot(trans, root, &curr->key, path, -1, 1); 95816cdcec7SMiao Xie if (ret < 0) 95916cdcec7SMiao Xie goto delete_fail; 96016cdcec7SMiao Xie else if (ret > 0) { 96116cdcec7SMiao Xie /* 96216cdcec7SMiao Xie * can't find the item which the node points to, so this node 96316cdcec7SMiao Xie * is invalid, just drop it. 96416cdcec7SMiao Xie */ 96516cdcec7SMiao Xie prev = curr; 96616cdcec7SMiao Xie curr = __btrfs_next_delayed_item(prev); 96716cdcec7SMiao Xie btrfs_release_delayed_item(prev); 96816cdcec7SMiao Xie ret = 0; 969945d8962SChris Mason btrfs_release_path(path); 97062095265SFengguang Wu if (curr) { 97162095265SFengguang Wu mutex_unlock(&node->mutex); 97216cdcec7SMiao Xie goto do_again; 97362095265SFengguang Wu } else 97416cdcec7SMiao Xie goto delete_fail; 97516cdcec7SMiao Xie } 97616cdcec7SMiao Xie 97716cdcec7SMiao Xie btrfs_batch_delete_items(trans, root, path, curr); 978945d8962SChris Mason btrfs_release_path(path); 97916cdcec7SMiao Xie mutex_unlock(&node->mutex); 98016cdcec7SMiao Xie goto do_again; 98116cdcec7SMiao Xie 98216cdcec7SMiao Xie delete_fail: 983945d8962SChris Mason btrfs_release_path(path); 98416cdcec7SMiao Xie mutex_unlock(&node->mutex); 98516cdcec7SMiao Xie return ret; 98616cdcec7SMiao Xie } 98716cdcec7SMiao Xie 98816cdcec7SMiao Xie static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) 98916cdcec7SMiao Xie { 99016cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 99116cdcec7SMiao Xie 9927cf35d91SMiao Xie if (delayed_node && 9937cf35d91SMiao Xie test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { 99416cdcec7SMiao Xie BUG_ON(!delayed_node->root); 9957cf35d91SMiao Xie clear_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); 99616cdcec7SMiao Xie delayed_node->count--; 99716cdcec7SMiao Xie 99816cdcec7SMiao Xie delayed_root = delayed_node->root->fs_info->delayed_root; 999de3cb945SChris Mason finish_one_item(delayed_root); 100016cdcec7SMiao Xie } 100116cdcec7SMiao Xie } 100216cdcec7SMiao Xie 100367de1176SMiao Xie static void btrfs_release_delayed_iref(struct btrfs_delayed_node *delayed_node) 100467de1176SMiao Xie { 100567de1176SMiao Xie struct btrfs_delayed_root *delayed_root; 100667de1176SMiao Xie 100767de1176SMiao Xie ASSERT(delayed_node->root); 100867de1176SMiao Xie clear_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); 100967de1176SMiao Xie delayed_node->count--; 101067de1176SMiao Xie 101167de1176SMiao Xie delayed_root = delayed_node->root->fs_info->delayed_root; 101267de1176SMiao Xie finish_one_item(delayed_root); 101367de1176SMiao Xie } 101467de1176SMiao Xie 10150e8c36a9SMiao Xie static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, 101616cdcec7SMiao Xie struct btrfs_root *root, 101716cdcec7SMiao Xie struct btrfs_path *path, 101816cdcec7SMiao Xie struct btrfs_delayed_node *node) 101916cdcec7SMiao Xie { 102016cdcec7SMiao Xie struct btrfs_key key; 102116cdcec7SMiao Xie struct btrfs_inode_item *inode_item; 102216cdcec7SMiao Xie struct extent_buffer *leaf; 102367de1176SMiao Xie int mod; 102416cdcec7SMiao Xie int ret; 102516cdcec7SMiao Xie 102616cdcec7SMiao Xie key.objectid = node->inode_id; 1027962a298fSDavid Sterba key.type = BTRFS_INODE_ITEM_KEY; 102816cdcec7SMiao Xie key.offset = 0; 10290e8c36a9SMiao Xie 103067de1176SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) 103167de1176SMiao Xie mod = -1; 103267de1176SMiao Xie else 103367de1176SMiao Xie mod = 1; 103467de1176SMiao Xie 103567de1176SMiao Xie ret = btrfs_lookup_inode(trans, root, path, &key, mod); 103616cdcec7SMiao Xie if (ret > 0) { 1037945d8962SChris Mason btrfs_release_path(path); 103816cdcec7SMiao Xie return -ENOENT; 103916cdcec7SMiao Xie } else if (ret < 0) { 104016cdcec7SMiao Xie return ret; 104116cdcec7SMiao Xie } 104216cdcec7SMiao Xie 104316cdcec7SMiao Xie leaf = path->nodes[0]; 104416cdcec7SMiao Xie inode_item = btrfs_item_ptr(leaf, path->slots[0], 104516cdcec7SMiao Xie struct btrfs_inode_item); 104616cdcec7SMiao Xie write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item, 104716cdcec7SMiao Xie sizeof(struct btrfs_inode_item)); 104816cdcec7SMiao Xie btrfs_mark_buffer_dirty(leaf); 104916cdcec7SMiao Xie 105067de1176SMiao Xie if (!test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) 105167de1176SMiao Xie goto no_iref; 105267de1176SMiao Xie 105367de1176SMiao Xie path->slots[0]++; 105467de1176SMiao Xie if (path->slots[0] >= btrfs_header_nritems(leaf)) 105567de1176SMiao Xie goto search; 105667de1176SMiao Xie again: 105767de1176SMiao Xie btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); 105867de1176SMiao Xie if (key.objectid != node->inode_id) 105967de1176SMiao Xie goto out; 106067de1176SMiao Xie 106167de1176SMiao Xie if (key.type != BTRFS_INODE_REF_KEY && 106267de1176SMiao Xie key.type != BTRFS_INODE_EXTREF_KEY) 106367de1176SMiao Xie goto out; 106467de1176SMiao Xie 106567de1176SMiao Xie /* 106667de1176SMiao Xie * Delayed iref deletion is for the inode who has only one link, 106767de1176SMiao Xie * so there is only one iref. The case that several irefs are 106867de1176SMiao Xie * in the same item doesn't exist. 106967de1176SMiao Xie */ 107067de1176SMiao Xie btrfs_del_item(trans, root, path); 107167de1176SMiao Xie out: 107267de1176SMiao Xie btrfs_release_delayed_iref(node); 107367de1176SMiao Xie no_iref: 107467de1176SMiao Xie btrfs_release_path(path); 107567de1176SMiao Xie err_out: 107616cdcec7SMiao Xie btrfs_delayed_inode_release_metadata(root, node); 107716cdcec7SMiao Xie btrfs_release_delayed_inode(node); 107816cdcec7SMiao Xie 107967de1176SMiao Xie return ret; 108067de1176SMiao Xie 108167de1176SMiao Xie search: 108267de1176SMiao Xie btrfs_release_path(path); 108367de1176SMiao Xie 1084962a298fSDavid Sterba key.type = BTRFS_INODE_EXTREF_KEY; 108567de1176SMiao Xie key.offset = -1; 108667de1176SMiao Xie ret = btrfs_search_slot(trans, root, &key, path, -1, 1); 108767de1176SMiao Xie if (ret < 0) 108867de1176SMiao Xie goto err_out; 108967de1176SMiao Xie ASSERT(ret); 109067de1176SMiao Xie 109167de1176SMiao Xie ret = 0; 109267de1176SMiao Xie leaf = path->nodes[0]; 109367de1176SMiao Xie path->slots[0]--; 109467de1176SMiao Xie goto again; 109516cdcec7SMiao Xie } 109616cdcec7SMiao Xie 10970e8c36a9SMiao Xie static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, 10980e8c36a9SMiao Xie struct btrfs_root *root, 10990e8c36a9SMiao Xie struct btrfs_path *path, 11000e8c36a9SMiao Xie struct btrfs_delayed_node *node) 11010e8c36a9SMiao Xie { 11020e8c36a9SMiao Xie int ret; 11030e8c36a9SMiao Xie 11040e8c36a9SMiao Xie mutex_lock(&node->mutex); 11057cf35d91SMiao Xie if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &node->flags)) { 11060e8c36a9SMiao Xie mutex_unlock(&node->mutex); 11070e8c36a9SMiao Xie return 0; 11080e8c36a9SMiao Xie } 11090e8c36a9SMiao Xie 11100e8c36a9SMiao Xie ret = __btrfs_update_delayed_inode(trans, root, path, node); 11110e8c36a9SMiao Xie mutex_unlock(&node->mutex); 11120e8c36a9SMiao Xie return ret; 11130e8c36a9SMiao Xie } 11140e8c36a9SMiao Xie 11154ea41ce0SMiao Xie static inline int 11164ea41ce0SMiao Xie __btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, 11174ea41ce0SMiao Xie struct btrfs_path *path, 11184ea41ce0SMiao Xie struct btrfs_delayed_node *node) 11194ea41ce0SMiao Xie { 11204ea41ce0SMiao Xie int ret; 11214ea41ce0SMiao Xie 11224ea41ce0SMiao Xie ret = btrfs_insert_delayed_items(trans, path, node->root, node); 11234ea41ce0SMiao Xie if (ret) 11244ea41ce0SMiao Xie return ret; 11254ea41ce0SMiao Xie 11264ea41ce0SMiao Xie ret = btrfs_delete_delayed_items(trans, path, node->root, node); 11274ea41ce0SMiao Xie if (ret) 11284ea41ce0SMiao Xie return ret; 11294ea41ce0SMiao Xie 11304ea41ce0SMiao Xie ret = btrfs_update_delayed_inode(trans, node->root, path, node); 11314ea41ce0SMiao Xie return ret; 11324ea41ce0SMiao Xie } 11334ea41ce0SMiao Xie 113479787eaaSJeff Mahoney /* 113579787eaaSJeff Mahoney * Called when committing the transaction. 113679787eaaSJeff Mahoney * Returns 0 on success. 113779787eaaSJeff Mahoney * Returns < 0 on error and returns with an aborted transaction with any 113879787eaaSJeff Mahoney * outstanding delayed items cleaned up. 113979787eaaSJeff Mahoney */ 114096c3f433SJosef Bacik static int __btrfs_run_delayed_items(struct btrfs_trans_handle *trans, 114196c3f433SJosef Bacik struct btrfs_root *root, int nr) 114216cdcec7SMiao Xie { 114316cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 114416cdcec7SMiao Xie struct btrfs_delayed_node *curr_node, *prev_node; 114516cdcec7SMiao Xie struct btrfs_path *path; 114619fd2949SMiao Xie struct btrfs_block_rsv *block_rsv; 114716cdcec7SMiao Xie int ret = 0; 114896c3f433SJosef Bacik bool count = (nr > 0); 114916cdcec7SMiao Xie 115079787eaaSJeff Mahoney if (trans->aborted) 115179787eaaSJeff Mahoney return -EIO; 115279787eaaSJeff Mahoney 115316cdcec7SMiao Xie path = btrfs_alloc_path(); 115416cdcec7SMiao Xie if (!path) 115516cdcec7SMiao Xie return -ENOMEM; 115616cdcec7SMiao Xie path->leave_spinning = 1; 115716cdcec7SMiao Xie 115819fd2949SMiao Xie block_rsv = trans->block_rsv; 11596d668ddaSJosef Bacik trans->block_rsv = &root->fs_info->delayed_block_rsv; 116019fd2949SMiao Xie 116116cdcec7SMiao Xie delayed_root = btrfs_get_delayed_root(root); 116216cdcec7SMiao Xie 116316cdcec7SMiao Xie curr_node = btrfs_first_delayed_node(delayed_root); 116496c3f433SJosef Bacik while (curr_node && (!count || (count && nr--))) { 11654ea41ce0SMiao Xie ret = __btrfs_commit_inode_delayed_items(trans, path, 116616cdcec7SMiao Xie curr_node); 116716cdcec7SMiao Xie if (ret) { 116816cdcec7SMiao Xie btrfs_release_delayed_node(curr_node); 116996c3f433SJosef Bacik curr_node = NULL; 117066642832SJeff Mahoney btrfs_abort_transaction(trans, ret); 117116cdcec7SMiao Xie break; 117216cdcec7SMiao Xie } 117316cdcec7SMiao Xie 117416cdcec7SMiao Xie prev_node = curr_node; 117516cdcec7SMiao Xie curr_node = btrfs_next_delayed_node(curr_node); 117616cdcec7SMiao Xie btrfs_release_delayed_node(prev_node); 117716cdcec7SMiao Xie } 117816cdcec7SMiao Xie 117996c3f433SJosef Bacik if (curr_node) 118096c3f433SJosef Bacik btrfs_release_delayed_node(curr_node); 118116cdcec7SMiao Xie btrfs_free_path(path); 118219fd2949SMiao Xie trans->block_rsv = block_rsv; 118379787eaaSJeff Mahoney 118416cdcec7SMiao Xie return ret; 118516cdcec7SMiao Xie } 118616cdcec7SMiao Xie 118796c3f433SJosef Bacik int btrfs_run_delayed_items(struct btrfs_trans_handle *trans, 118896c3f433SJosef Bacik struct btrfs_root *root) 118996c3f433SJosef Bacik { 119096c3f433SJosef Bacik return __btrfs_run_delayed_items(trans, root, -1); 119196c3f433SJosef Bacik } 119296c3f433SJosef Bacik 119396c3f433SJosef Bacik int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, 119496c3f433SJosef Bacik struct btrfs_root *root, int nr) 119596c3f433SJosef Bacik { 119696c3f433SJosef Bacik return __btrfs_run_delayed_items(trans, root, nr); 119796c3f433SJosef Bacik } 119896c3f433SJosef Bacik 119916cdcec7SMiao Xie int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, 120016cdcec7SMiao Xie struct inode *inode) 120116cdcec7SMiao Xie { 120216cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); 12034ea41ce0SMiao Xie struct btrfs_path *path; 12044ea41ce0SMiao Xie struct btrfs_block_rsv *block_rsv; 120516cdcec7SMiao Xie int ret; 120616cdcec7SMiao Xie 120716cdcec7SMiao Xie if (!delayed_node) 120816cdcec7SMiao Xie return 0; 120916cdcec7SMiao Xie 121016cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 121116cdcec7SMiao Xie if (!delayed_node->count) { 121216cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 121316cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 121416cdcec7SMiao Xie return 0; 121516cdcec7SMiao Xie } 121616cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 121716cdcec7SMiao Xie 12184ea41ce0SMiao Xie path = btrfs_alloc_path(); 12193c77bd94SFilipe David Borba Manana if (!path) { 12203c77bd94SFilipe David Borba Manana btrfs_release_delayed_node(delayed_node); 12214ea41ce0SMiao Xie return -ENOMEM; 12223c77bd94SFilipe David Borba Manana } 12234ea41ce0SMiao Xie path->leave_spinning = 1; 12244ea41ce0SMiao Xie 12254ea41ce0SMiao Xie block_rsv = trans->block_rsv; 12264ea41ce0SMiao Xie trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; 12274ea41ce0SMiao Xie 12284ea41ce0SMiao Xie ret = __btrfs_commit_inode_delayed_items(trans, path, delayed_node); 12294ea41ce0SMiao Xie 123016cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 12314ea41ce0SMiao Xie btrfs_free_path(path); 12324ea41ce0SMiao Xie trans->block_rsv = block_rsv; 12334ea41ce0SMiao Xie 123416cdcec7SMiao Xie return ret; 123516cdcec7SMiao Xie } 123616cdcec7SMiao Xie 12370e8c36a9SMiao Xie int btrfs_commit_inode_delayed_inode(struct inode *inode) 12380e8c36a9SMiao Xie { 12390e8c36a9SMiao Xie struct btrfs_trans_handle *trans; 12400e8c36a9SMiao Xie struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); 12410e8c36a9SMiao Xie struct btrfs_path *path; 12420e8c36a9SMiao Xie struct btrfs_block_rsv *block_rsv; 12430e8c36a9SMiao Xie int ret; 12440e8c36a9SMiao Xie 12450e8c36a9SMiao Xie if (!delayed_node) 12460e8c36a9SMiao Xie return 0; 12470e8c36a9SMiao Xie 12480e8c36a9SMiao Xie mutex_lock(&delayed_node->mutex); 12497cf35d91SMiao Xie if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { 12500e8c36a9SMiao Xie mutex_unlock(&delayed_node->mutex); 12510e8c36a9SMiao Xie btrfs_release_delayed_node(delayed_node); 12520e8c36a9SMiao Xie return 0; 12530e8c36a9SMiao Xie } 12540e8c36a9SMiao Xie mutex_unlock(&delayed_node->mutex); 12550e8c36a9SMiao Xie 12560e8c36a9SMiao Xie trans = btrfs_join_transaction(delayed_node->root); 12570e8c36a9SMiao Xie if (IS_ERR(trans)) { 12580e8c36a9SMiao Xie ret = PTR_ERR(trans); 12590e8c36a9SMiao Xie goto out; 12600e8c36a9SMiao Xie } 12610e8c36a9SMiao Xie 12620e8c36a9SMiao Xie path = btrfs_alloc_path(); 12630e8c36a9SMiao Xie if (!path) { 12640e8c36a9SMiao Xie ret = -ENOMEM; 12650e8c36a9SMiao Xie goto trans_out; 12660e8c36a9SMiao Xie } 12670e8c36a9SMiao Xie path->leave_spinning = 1; 12680e8c36a9SMiao Xie 12690e8c36a9SMiao Xie block_rsv = trans->block_rsv; 12700e8c36a9SMiao Xie trans->block_rsv = &delayed_node->root->fs_info->delayed_block_rsv; 12710e8c36a9SMiao Xie 12720e8c36a9SMiao Xie mutex_lock(&delayed_node->mutex); 12737cf35d91SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) 12740e8c36a9SMiao Xie ret = __btrfs_update_delayed_inode(trans, delayed_node->root, 12750e8c36a9SMiao Xie path, delayed_node); 12760e8c36a9SMiao Xie else 12770e8c36a9SMiao Xie ret = 0; 12780e8c36a9SMiao Xie mutex_unlock(&delayed_node->mutex); 12790e8c36a9SMiao Xie 12800e8c36a9SMiao Xie btrfs_free_path(path); 12810e8c36a9SMiao Xie trans->block_rsv = block_rsv; 12820e8c36a9SMiao Xie trans_out: 12830e8c36a9SMiao Xie btrfs_end_transaction(trans, delayed_node->root); 12840e8c36a9SMiao Xie btrfs_btree_balance_dirty(delayed_node->root); 12850e8c36a9SMiao Xie out: 12860e8c36a9SMiao Xie btrfs_release_delayed_node(delayed_node); 12870e8c36a9SMiao Xie 12880e8c36a9SMiao Xie return ret; 12890e8c36a9SMiao Xie } 12900e8c36a9SMiao Xie 129116cdcec7SMiao Xie void btrfs_remove_delayed_node(struct inode *inode) 129216cdcec7SMiao Xie { 129316cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node; 129416cdcec7SMiao Xie 129516cdcec7SMiao Xie delayed_node = ACCESS_ONCE(BTRFS_I(inode)->delayed_node); 129616cdcec7SMiao Xie if (!delayed_node) 129716cdcec7SMiao Xie return; 129816cdcec7SMiao Xie 129916cdcec7SMiao Xie BTRFS_I(inode)->delayed_node = NULL; 130016cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 130116cdcec7SMiao Xie } 130216cdcec7SMiao Xie 1303de3cb945SChris Mason struct btrfs_async_delayed_work { 1304de3cb945SChris Mason struct btrfs_delayed_root *delayed_root; 1305de3cb945SChris Mason int nr; 1306d458b054SQu Wenruo struct btrfs_work work; 130716cdcec7SMiao Xie }; 130816cdcec7SMiao Xie 1309d458b054SQu Wenruo static void btrfs_async_run_delayed_root(struct btrfs_work *work) 131016cdcec7SMiao Xie { 1311de3cb945SChris Mason struct btrfs_async_delayed_work *async_work; 1312de3cb945SChris Mason struct btrfs_delayed_root *delayed_root; 131316cdcec7SMiao Xie struct btrfs_trans_handle *trans; 131416cdcec7SMiao Xie struct btrfs_path *path; 131516cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node = NULL; 131616cdcec7SMiao Xie struct btrfs_root *root; 131719fd2949SMiao Xie struct btrfs_block_rsv *block_rsv; 1318de3cb945SChris Mason int total_done = 0; 131916cdcec7SMiao Xie 1320de3cb945SChris Mason async_work = container_of(work, struct btrfs_async_delayed_work, work); 1321de3cb945SChris Mason delayed_root = async_work->delayed_root; 132216cdcec7SMiao Xie 132316cdcec7SMiao Xie path = btrfs_alloc_path(); 132416cdcec7SMiao Xie if (!path) 132516cdcec7SMiao Xie goto out; 132616cdcec7SMiao Xie 1327de3cb945SChris Mason again: 1328de3cb945SChris Mason if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND / 2) 1329de3cb945SChris Mason goto free_path; 1330de3cb945SChris Mason 1331de3cb945SChris Mason delayed_node = btrfs_first_prepared_delayed_node(delayed_root); 1332de3cb945SChris Mason if (!delayed_node) 1333de3cb945SChris Mason goto free_path; 1334de3cb945SChris Mason 1335de3cb945SChris Mason path->leave_spinning = 1; 133616cdcec7SMiao Xie root = delayed_node->root; 133716cdcec7SMiao Xie 1338ff5714ccSChris Mason trans = btrfs_join_transaction(root); 133916cdcec7SMiao Xie if (IS_ERR(trans)) 1340de3cb945SChris Mason goto release_path; 134116cdcec7SMiao Xie 134219fd2949SMiao Xie block_rsv = trans->block_rsv; 13436d668ddaSJosef Bacik trans->block_rsv = &root->fs_info->delayed_block_rsv; 134419fd2949SMiao Xie 13454ea41ce0SMiao Xie __btrfs_commit_inode_delayed_items(trans, path, delayed_node); 134616cdcec7SMiao Xie 134719fd2949SMiao Xie trans->block_rsv = block_rsv; 1348a56dbd89SMiao Xie btrfs_end_transaction(trans, root); 1349b53d3f5dSLiu Bo btrfs_btree_balance_dirty_nodelay(root); 1350de3cb945SChris Mason 1351de3cb945SChris Mason release_path: 1352de3cb945SChris Mason btrfs_release_path(path); 1353de3cb945SChris Mason total_done++; 1354de3cb945SChris Mason 1355de3cb945SChris Mason btrfs_release_prepared_delayed_node(delayed_node); 1356de3cb945SChris Mason if (async_work->nr == 0 || total_done < async_work->nr) 1357de3cb945SChris Mason goto again; 1358de3cb945SChris Mason 135916cdcec7SMiao Xie free_path: 136016cdcec7SMiao Xie btrfs_free_path(path); 136116cdcec7SMiao Xie out: 1362de3cb945SChris Mason wake_up(&delayed_root->wait); 1363de3cb945SChris Mason kfree(async_work); 136416cdcec7SMiao Xie } 1365de3cb945SChris Mason 136616cdcec7SMiao Xie 136716cdcec7SMiao Xie static int btrfs_wq_run_delayed_node(struct btrfs_delayed_root *delayed_root, 1368a585e948SDaniel Dressler struct btrfs_fs_info *fs_info, int nr) 136916cdcec7SMiao Xie { 1370de3cb945SChris Mason struct btrfs_async_delayed_work *async_work; 137116cdcec7SMiao Xie 1372de3cb945SChris Mason if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) 137316cdcec7SMiao Xie return 0; 137416cdcec7SMiao Xie 1375de3cb945SChris Mason async_work = kmalloc(sizeof(*async_work), GFP_NOFS); 1376de3cb945SChris Mason if (!async_work) 137716cdcec7SMiao Xie return -ENOMEM; 137816cdcec7SMiao Xie 1379de3cb945SChris Mason async_work->delayed_root = delayed_root; 13809e0af237SLiu Bo btrfs_init_work(&async_work->work, btrfs_delayed_meta_helper, 13819e0af237SLiu Bo btrfs_async_run_delayed_root, NULL, NULL); 1382de3cb945SChris Mason async_work->nr = nr; 138316cdcec7SMiao Xie 1384a585e948SDaniel Dressler btrfs_queue_work(fs_info->delayed_workers, &async_work->work); 138516cdcec7SMiao Xie return 0; 138616cdcec7SMiao Xie } 138716cdcec7SMiao Xie 1388e999376fSChris Mason void btrfs_assert_delayed_root_empty(struct btrfs_root *root) 1389e999376fSChris Mason { 1390e999376fSChris Mason struct btrfs_delayed_root *delayed_root; 1391e999376fSChris Mason delayed_root = btrfs_get_delayed_root(root); 1392e999376fSChris Mason WARN_ON(btrfs_first_delayed_node(delayed_root)); 1393e999376fSChris Mason } 1394e999376fSChris Mason 13950353808cSMiao Xie static int could_end_wait(struct btrfs_delayed_root *delayed_root, int seq) 1396de3cb945SChris Mason { 1397de3cb945SChris Mason int val = atomic_read(&delayed_root->items_seq); 1398de3cb945SChris Mason 13990353808cSMiao Xie if (val < seq || val >= seq + BTRFS_DELAYED_BATCH) 1400de3cb945SChris Mason return 1; 14010353808cSMiao Xie 14020353808cSMiao Xie if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) 14030353808cSMiao Xie return 1; 14040353808cSMiao Xie 1405de3cb945SChris Mason return 0; 1406de3cb945SChris Mason } 1407de3cb945SChris Mason 140816cdcec7SMiao Xie void btrfs_balance_delayed_items(struct btrfs_root *root) 140916cdcec7SMiao Xie { 141016cdcec7SMiao Xie struct btrfs_delayed_root *delayed_root; 1411a585e948SDaniel Dressler struct btrfs_fs_info *fs_info = root->fs_info; 141216cdcec7SMiao Xie 141316cdcec7SMiao Xie delayed_root = btrfs_get_delayed_root(root); 141416cdcec7SMiao Xie 141516cdcec7SMiao Xie if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND) 141616cdcec7SMiao Xie return; 141716cdcec7SMiao Xie 141816cdcec7SMiao Xie if (atomic_read(&delayed_root->items) >= BTRFS_DELAYED_WRITEBACK) { 14190353808cSMiao Xie int seq; 142016cdcec7SMiao Xie int ret; 14210353808cSMiao Xie 14220353808cSMiao Xie seq = atomic_read(&delayed_root->items_seq); 1423de3cb945SChris Mason 1424a585e948SDaniel Dressler ret = btrfs_wq_run_delayed_node(delayed_root, fs_info, 0); 142516cdcec7SMiao Xie if (ret) 142616cdcec7SMiao Xie return; 142716cdcec7SMiao Xie 14280353808cSMiao Xie wait_event_interruptible(delayed_root->wait, 14290353808cSMiao Xie could_end_wait(delayed_root, seq)); 14304dd466d3SMiao Xie return; 143116cdcec7SMiao Xie } 143216cdcec7SMiao Xie 1433a585e948SDaniel Dressler btrfs_wq_run_delayed_node(delayed_root, fs_info, BTRFS_DELAYED_BATCH); 143416cdcec7SMiao Xie } 143516cdcec7SMiao Xie 143679787eaaSJeff Mahoney /* Will return 0 or -ENOMEM */ 143716cdcec7SMiao Xie int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, 143816cdcec7SMiao Xie struct btrfs_root *root, const char *name, 143916cdcec7SMiao Xie int name_len, struct inode *dir, 144016cdcec7SMiao Xie struct btrfs_disk_key *disk_key, u8 type, 144116cdcec7SMiao Xie u64 index) 144216cdcec7SMiao Xie { 144316cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node; 144416cdcec7SMiao Xie struct btrfs_delayed_item *delayed_item; 144516cdcec7SMiao Xie struct btrfs_dir_item *dir_item; 144616cdcec7SMiao Xie int ret; 144716cdcec7SMiao Xie 144816cdcec7SMiao Xie delayed_node = btrfs_get_or_create_delayed_node(dir); 144916cdcec7SMiao Xie if (IS_ERR(delayed_node)) 145016cdcec7SMiao Xie return PTR_ERR(delayed_node); 145116cdcec7SMiao Xie 145216cdcec7SMiao Xie delayed_item = btrfs_alloc_delayed_item(sizeof(*dir_item) + name_len); 145316cdcec7SMiao Xie if (!delayed_item) { 145416cdcec7SMiao Xie ret = -ENOMEM; 145516cdcec7SMiao Xie goto release_node; 145616cdcec7SMiao Xie } 145716cdcec7SMiao Xie 14580d0ca30fSChris Mason delayed_item->key.objectid = btrfs_ino(dir); 1459962a298fSDavid Sterba delayed_item->key.type = BTRFS_DIR_INDEX_KEY; 146016cdcec7SMiao Xie delayed_item->key.offset = index; 146116cdcec7SMiao Xie 146216cdcec7SMiao Xie dir_item = (struct btrfs_dir_item *)delayed_item->data; 146316cdcec7SMiao Xie dir_item->location = *disk_key; 14643cae210fSQu Wenruo btrfs_set_stack_dir_transid(dir_item, trans->transid); 14653cae210fSQu Wenruo btrfs_set_stack_dir_data_len(dir_item, 0); 14663cae210fSQu Wenruo btrfs_set_stack_dir_name_len(dir_item, name_len); 14673cae210fSQu Wenruo btrfs_set_stack_dir_type(dir_item, type); 146816cdcec7SMiao Xie memcpy((char *)(dir_item + 1), name, name_len); 146916cdcec7SMiao Xie 14708c2a3ca2SJosef Bacik ret = btrfs_delayed_item_reserve_metadata(trans, root, delayed_item); 14718c2a3ca2SJosef Bacik /* 14728c2a3ca2SJosef Bacik * we have reserved enough space when we start a new transaction, 14738c2a3ca2SJosef Bacik * so reserving metadata failure is impossible 14748c2a3ca2SJosef Bacik */ 14758c2a3ca2SJosef Bacik BUG_ON(ret); 14768c2a3ca2SJosef Bacik 14778c2a3ca2SJosef Bacik 147816cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 147916cdcec7SMiao Xie ret = __btrfs_add_delayed_insertion_item(delayed_node, delayed_item); 148016cdcec7SMiao Xie if (unlikely(ret)) { 1481*5d163e0eSJeff Mahoney btrfs_err(root->fs_info, 1482*5d163e0eSJeff Mahoney "err add delayed dir index item(name: %.*s) into the insertion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", 1483bdab49d7SFilipe David Borba Manana name_len, name, delayed_node->root->objectid, 1484c1c9ff7cSGeert Uytterhoeven delayed_node->inode_id, ret); 148516cdcec7SMiao Xie BUG(); 148616cdcec7SMiao Xie } 148716cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 148816cdcec7SMiao Xie 148916cdcec7SMiao Xie release_node: 149016cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 149116cdcec7SMiao Xie return ret; 149216cdcec7SMiao Xie } 149316cdcec7SMiao Xie 149416cdcec7SMiao Xie static int btrfs_delete_delayed_insertion_item(struct btrfs_root *root, 149516cdcec7SMiao Xie struct btrfs_delayed_node *node, 149616cdcec7SMiao Xie struct btrfs_key *key) 149716cdcec7SMiao Xie { 149816cdcec7SMiao Xie struct btrfs_delayed_item *item; 149916cdcec7SMiao Xie 150016cdcec7SMiao Xie mutex_lock(&node->mutex); 150116cdcec7SMiao Xie item = __btrfs_lookup_delayed_insertion_item(node, key); 150216cdcec7SMiao Xie if (!item) { 150316cdcec7SMiao Xie mutex_unlock(&node->mutex); 150416cdcec7SMiao Xie return 1; 150516cdcec7SMiao Xie } 150616cdcec7SMiao Xie 150716cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, item); 150816cdcec7SMiao Xie btrfs_release_delayed_item(item); 150916cdcec7SMiao Xie mutex_unlock(&node->mutex); 151016cdcec7SMiao Xie return 0; 151116cdcec7SMiao Xie } 151216cdcec7SMiao Xie 151316cdcec7SMiao Xie int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, 151416cdcec7SMiao Xie struct btrfs_root *root, struct inode *dir, 151516cdcec7SMiao Xie u64 index) 151616cdcec7SMiao Xie { 151716cdcec7SMiao Xie struct btrfs_delayed_node *node; 151816cdcec7SMiao Xie struct btrfs_delayed_item *item; 151916cdcec7SMiao Xie struct btrfs_key item_key; 152016cdcec7SMiao Xie int ret; 152116cdcec7SMiao Xie 152216cdcec7SMiao Xie node = btrfs_get_or_create_delayed_node(dir); 152316cdcec7SMiao Xie if (IS_ERR(node)) 152416cdcec7SMiao Xie return PTR_ERR(node); 152516cdcec7SMiao Xie 15260d0ca30fSChris Mason item_key.objectid = btrfs_ino(dir); 1527962a298fSDavid Sterba item_key.type = BTRFS_DIR_INDEX_KEY; 152816cdcec7SMiao Xie item_key.offset = index; 152916cdcec7SMiao Xie 153016cdcec7SMiao Xie ret = btrfs_delete_delayed_insertion_item(root, node, &item_key); 153116cdcec7SMiao Xie if (!ret) 153216cdcec7SMiao Xie goto end; 153316cdcec7SMiao Xie 153416cdcec7SMiao Xie item = btrfs_alloc_delayed_item(0); 153516cdcec7SMiao Xie if (!item) { 153616cdcec7SMiao Xie ret = -ENOMEM; 153716cdcec7SMiao Xie goto end; 153816cdcec7SMiao Xie } 153916cdcec7SMiao Xie 154016cdcec7SMiao Xie item->key = item_key; 154116cdcec7SMiao Xie 154216cdcec7SMiao Xie ret = btrfs_delayed_item_reserve_metadata(trans, root, item); 154316cdcec7SMiao Xie /* 154416cdcec7SMiao Xie * we have reserved enough space when we start a new transaction, 154516cdcec7SMiao Xie * so reserving metadata failure is impossible. 154616cdcec7SMiao Xie */ 154716cdcec7SMiao Xie BUG_ON(ret); 154816cdcec7SMiao Xie 154916cdcec7SMiao Xie mutex_lock(&node->mutex); 155016cdcec7SMiao Xie ret = __btrfs_add_delayed_deletion_item(node, item); 155116cdcec7SMiao Xie if (unlikely(ret)) { 1552*5d163e0eSJeff Mahoney btrfs_err(root->fs_info, 1553*5d163e0eSJeff Mahoney "err add delayed dir index item(index: %llu) into the deletion tree of the delayed node(root id: %llu, inode id: %llu, errno: %d)", 1554*5d163e0eSJeff Mahoney index, node->root->objectid, node->inode_id, ret); 155516cdcec7SMiao Xie BUG(); 155616cdcec7SMiao Xie } 155716cdcec7SMiao Xie mutex_unlock(&node->mutex); 155816cdcec7SMiao Xie end: 155916cdcec7SMiao Xie btrfs_release_delayed_node(node); 156016cdcec7SMiao Xie return ret; 156116cdcec7SMiao Xie } 156216cdcec7SMiao Xie 156316cdcec7SMiao Xie int btrfs_inode_delayed_dir_index_count(struct inode *inode) 156416cdcec7SMiao Xie { 15652f7e33d4SMiao Xie struct btrfs_delayed_node *delayed_node = btrfs_get_delayed_node(inode); 156616cdcec7SMiao Xie 156716cdcec7SMiao Xie if (!delayed_node) 156816cdcec7SMiao Xie return -ENOENT; 156916cdcec7SMiao Xie 157016cdcec7SMiao Xie /* 157116cdcec7SMiao Xie * Since we have held i_mutex of this directory, it is impossible that 157216cdcec7SMiao Xie * a new directory index is added into the delayed node and index_cnt 157316cdcec7SMiao Xie * is updated now. So we needn't lock the delayed node. 157416cdcec7SMiao Xie */ 15752f7e33d4SMiao Xie if (!delayed_node->index_cnt) { 15762f7e33d4SMiao Xie btrfs_release_delayed_node(delayed_node); 157716cdcec7SMiao Xie return -EINVAL; 15782f7e33d4SMiao Xie } 157916cdcec7SMiao Xie 158016cdcec7SMiao Xie BTRFS_I(inode)->index_cnt = delayed_node->index_cnt; 15812f7e33d4SMiao Xie btrfs_release_delayed_node(delayed_node); 15822f7e33d4SMiao Xie return 0; 158316cdcec7SMiao Xie } 158416cdcec7SMiao Xie 158502dbfc99SOmar Sandoval bool btrfs_readdir_get_delayed_items(struct inode *inode, 158602dbfc99SOmar Sandoval struct list_head *ins_list, 158716cdcec7SMiao Xie struct list_head *del_list) 158816cdcec7SMiao Xie { 158916cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node; 159016cdcec7SMiao Xie struct btrfs_delayed_item *item; 159116cdcec7SMiao Xie 159216cdcec7SMiao Xie delayed_node = btrfs_get_delayed_node(inode); 159316cdcec7SMiao Xie if (!delayed_node) 159402dbfc99SOmar Sandoval return false; 159502dbfc99SOmar Sandoval 159602dbfc99SOmar Sandoval /* 159702dbfc99SOmar Sandoval * We can only do one readdir with delayed items at a time because of 159802dbfc99SOmar Sandoval * item->readdir_list. 159902dbfc99SOmar Sandoval */ 160002dbfc99SOmar Sandoval inode_unlock_shared(inode); 160102dbfc99SOmar Sandoval inode_lock(inode); 160216cdcec7SMiao Xie 160316cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 160416cdcec7SMiao Xie item = __btrfs_first_delayed_insertion_item(delayed_node); 160516cdcec7SMiao Xie while (item) { 160616cdcec7SMiao Xie atomic_inc(&item->refs); 160716cdcec7SMiao Xie list_add_tail(&item->readdir_list, ins_list); 160816cdcec7SMiao Xie item = __btrfs_next_delayed_item(item); 160916cdcec7SMiao Xie } 161016cdcec7SMiao Xie 161116cdcec7SMiao Xie item = __btrfs_first_delayed_deletion_item(delayed_node); 161216cdcec7SMiao Xie while (item) { 161316cdcec7SMiao Xie atomic_inc(&item->refs); 161416cdcec7SMiao Xie list_add_tail(&item->readdir_list, del_list); 161516cdcec7SMiao Xie item = __btrfs_next_delayed_item(item); 161616cdcec7SMiao Xie } 161716cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 161816cdcec7SMiao Xie /* 161916cdcec7SMiao Xie * This delayed node is still cached in the btrfs inode, so refs 162016cdcec7SMiao Xie * must be > 1 now, and we needn't check it is going to be freed 162116cdcec7SMiao Xie * or not. 162216cdcec7SMiao Xie * 162316cdcec7SMiao Xie * Besides that, this function is used to read dir, we do not 162416cdcec7SMiao Xie * insert/delete delayed items in this period. So we also needn't 162516cdcec7SMiao Xie * requeue or dequeue this delayed node. 162616cdcec7SMiao Xie */ 162716cdcec7SMiao Xie atomic_dec(&delayed_node->refs); 162802dbfc99SOmar Sandoval 162902dbfc99SOmar Sandoval return true; 163016cdcec7SMiao Xie } 163116cdcec7SMiao Xie 163202dbfc99SOmar Sandoval void btrfs_readdir_put_delayed_items(struct inode *inode, 163302dbfc99SOmar Sandoval struct list_head *ins_list, 163416cdcec7SMiao Xie struct list_head *del_list) 163516cdcec7SMiao Xie { 163616cdcec7SMiao Xie struct btrfs_delayed_item *curr, *next; 163716cdcec7SMiao Xie 163816cdcec7SMiao Xie list_for_each_entry_safe(curr, next, ins_list, readdir_list) { 163916cdcec7SMiao Xie list_del(&curr->readdir_list); 164016cdcec7SMiao Xie if (atomic_dec_and_test(&curr->refs)) 164116cdcec7SMiao Xie kfree(curr); 164216cdcec7SMiao Xie } 164316cdcec7SMiao Xie 164416cdcec7SMiao Xie list_for_each_entry_safe(curr, next, del_list, readdir_list) { 164516cdcec7SMiao Xie list_del(&curr->readdir_list); 164616cdcec7SMiao Xie if (atomic_dec_and_test(&curr->refs)) 164716cdcec7SMiao Xie kfree(curr); 164816cdcec7SMiao Xie } 164902dbfc99SOmar Sandoval 165002dbfc99SOmar Sandoval /* 165102dbfc99SOmar Sandoval * The VFS is going to do up_read(), so we need to downgrade back to a 165202dbfc99SOmar Sandoval * read lock. 165302dbfc99SOmar Sandoval */ 165402dbfc99SOmar Sandoval downgrade_write(&inode->i_rwsem); 165516cdcec7SMiao Xie } 165616cdcec7SMiao Xie 165716cdcec7SMiao Xie int btrfs_should_delete_dir_index(struct list_head *del_list, 165816cdcec7SMiao Xie u64 index) 165916cdcec7SMiao Xie { 166016cdcec7SMiao Xie struct btrfs_delayed_item *curr, *next; 166116cdcec7SMiao Xie int ret; 166216cdcec7SMiao Xie 166316cdcec7SMiao Xie if (list_empty(del_list)) 166416cdcec7SMiao Xie return 0; 166516cdcec7SMiao Xie 166616cdcec7SMiao Xie list_for_each_entry_safe(curr, next, del_list, readdir_list) { 166716cdcec7SMiao Xie if (curr->key.offset > index) 166816cdcec7SMiao Xie break; 166916cdcec7SMiao Xie 167016cdcec7SMiao Xie list_del(&curr->readdir_list); 167116cdcec7SMiao Xie ret = (curr->key.offset == index); 167216cdcec7SMiao Xie 167316cdcec7SMiao Xie if (atomic_dec_and_test(&curr->refs)) 167416cdcec7SMiao Xie kfree(curr); 167516cdcec7SMiao Xie 167616cdcec7SMiao Xie if (ret) 167716cdcec7SMiao Xie return 1; 167816cdcec7SMiao Xie else 167916cdcec7SMiao Xie continue; 168016cdcec7SMiao Xie } 168116cdcec7SMiao Xie return 0; 168216cdcec7SMiao Xie } 168316cdcec7SMiao Xie 168416cdcec7SMiao Xie /* 168516cdcec7SMiao Xie * btrfs_readdir_delayed_dir_index - read dir info stored in the delayed tree 168616cdcec7SMiao Xie * 168716cdcec7SMiao Xie */ 16889cdda8d3SAl Viro int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, 1689bc4ef759SDavid Sterba struct list_head *ins_list, bool *emitted) 169016cdcec7SMiao Xie { 169116cdcec7SMiao Xie struct btrfs_dir_item *di; 169216cdcec7SMiao Xie struct btrfs_delayed_item *curr, *next; 169316cdcec7SMiao Xie struct btrfs_key location; 169416cdcec7SMiao Xie char *name; 169516cdcec7SMiao Xie int name_len; 169616cdcec7SMiao Xie int over = 0; 169716cdcec7SMiao Xie unsigned char d_type; 169816cdcec7SMiao Xie 169916cdcec7SMiao Xie if (list_empty(ins_list)) 170016cdcec7SMiao Xie return 0; 170116cdcec7SMiao Xie 170216cdcec7SMiao Xie /* 170316cdcec7SMiao Xie * Changing the data of the delayed item is impossible. So 170416cdcec7SMiao Xie * we needn't lock them. And we have held i_mutex of the 170516cdcec7SMiao Xie * directory, nobody can delete any directory indexes now. 170616cdcec7SMiao Xie */ 170716cdcec7SMiao Xie list_for_each_entry_safe(curr, next, ins_list, readdir_list) { 170816cdcec7SMiao Xie list_del(&curr->readdir_list); 170916cdcec7SMiao Xie 17109cdda8d3SAl Viro if (curr->key.offset < ctx->pos) { 171116cdcec7SMiao Xie if (atomic_dec_and_test(&curr->refs)) 171216cdcec7SMiao Xie kfree(curr); 171316cdcec7SMiao Xie continue; 171416cdcec7SMiao Xie } 171516cdcec7SMiao Xie 17169cdda8d3SAl Viro ctx->pos = curr->key.offset; 171716cdcec7SMiao Xie 171816cdcec7SMiao Xie di = (struct btrfs_dir_item *)curr->data; 171916cdcec7SMiao Xie name = (char *)(di + 1); 17203cae210fSQu Wenruo name_len = btrfs_stack_dir_name_len(di); 172116cdcec7SMiao Xie 172216cdcec7SMiao Xie d_type = btrfs_filetype_table[di->type]; 172316cdcec7SMiao Xie btrfs_disk_key_to_cpu(&location, &di->location); 172416cdcec7SMiao Xie 17259cdda8d3SAl Viro over = !dir_emit(ctx, name, name_len, 172616cdcec7SMiao Xie location.objectid, d_type); 172716cdcec7SMiao Xie 172816cdcec7SMiao Xie if (atomic_dec_and_test(&curr->refs)) 172916cdcec7SMiao Xie kfree(curr); 173016cdcec7SMiao Xie 173116cdcec7SMiao Xie if (over) 173216cdcec7SMiao Xie return 1; 1733bc4ef759SDavid Sterba *emitted = true; 173416cdcec7SMiao Xie } 173516cdcec7SMiao Xie return 0; 173616cdcec7SMiao Xie } 173716cdcec7SMiao Xie 173816cdcec7SMiao Xie static void fill_stack_inode_item(struct btrfs_trans_handle *trans, 173916cdcec7SMiao Xie struct btrfs_inode_item *inode_item, 174016cdcec7SMiao Xie struct inode *inode) 174116cdcec7SMiao Xie { 17422f2f43d3SEric W. Biederman btrfs_set_stack_inode_uid(inode_item, i_uid_read(inode)); 17432f2f43d3SEric W. Biederman btrfs_set_stack_inode_gid(inode_item, i_gid_read(inode)); 174416cdcec7SMiao Xie btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size); 174516cdcec7SMiao Xie btrfs_set_stack_inode_mode(inode_item, inode->i_mode); 174616cdcec7SMiao Xie btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink); 174716cdcec7SMiao Xie btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode)); 174816cdcec7SMiao Xie btrfs_set_stack_inode_generation(inode_item, 174916cdcec7SMiao Xie BTRFS_I(inode)->generation); 17500c4d2d95SJosef Bacik btrfs_set_stack_inode_sequence(inode_item, inode->i_version); 175116cdcec7SMiao Xie btrfs_set_stack_inode_transid(inode_item, trans->transid); 175216cdcec7SMiao Xie btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev); 175316cdcec7SMiao Xie btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags); 1754ff5714ccSChris Mason btrfs_set_stack_inode_block_group(inode_item, 0); 175516cdcec7SMiao Xie 1756a937b979SDavid Sterba btrfs_set_stack_timespec_sec(&inode_item->atime, 175716cdcec7SMiao Xie inode->i_atime.tv_sec); 1758a937b979SDavid Sterba btrfs_set_stack_timespec_nsec(&inode_item->atime, 175916cdcec7SMiao Xie inode->i_atime.tv_nsec); 176016cdcec7SMiao Xie 1761a937b979SDavid Sterba btrfs_set_stack_timespec_sec(&inode_item->mtime, 176216cdcec7SMiao Xie inode->i_mtime.tv_sec); 1763a937b979SDavid Sterba btrfs_set_stack_timespec_nsec(&inode_item->mtime, 176416cdcec7SMiao Xie inode->i_mtime.tv_nsec); 176516cdcec7SMiao Xie 1766a937b979SDavid Sterba btrfs_set_stack_timespec_sec(&inode_item->ctime, 176716cdcec7SMiao Xie inode->i_ctime.tv_sec); 1768a937b979SDavid Sterba btrfs_set_stack_timespec_nsec(&inode_item->ctime, 176916cdcec7SMiao Xie inode->i_ctime.tv_nsec); 17709cc97d64Schandan r 17719cc97d64Schandan r btrfs_set_stack_timespec_sec(&inode_item->otime, 17729cc97d64Schandan r BTRFS_I(inode)->i_otime.tv_sec); 17739cc97d64Schandan r btrfs_set_stack_timespec_nsec(&inode_item->otime, 17749cc97d64Schandan r BTRFS_I(inode)->i_otime.tv_nsec); 177516cdcec7SMiao Xie } 177616cdcec7SMiao Xie 17772f7e33d4SMiao Xie int btrfs_fill_inode(struct inode *inode, u32 *rdev) 17782f7e33d4SMiao Xie { 17792f7e33d4SMiao Xie struct btrfs_delayed_node *delayed_node; 17802f7e33d4SMiao Xie struct btrfs_inode_item *inode_item; 17812f7e33d4SMiao Xie 17822f7e33d4SMiao Xie delayed_node = btrfs_get_delayed_node(inode); 17832f7e33d4SMiao Xie if (!delayed_node) 17842f7e33d4SMiao Xie return -ENOENT; 17852f7e33d4SMiao Xie 17862f7e33d4SMiao Xie mutex_lock(&delayed_node->mutex); 17877cf35d91SMiao Xie if (!test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { 17882f7e33d4SMiao Xie mutex_unlock(&delayed_node->mutex); 17892f7e33d4SMiao Xie btrfs_release_delayed_node(delayed_node); 17902f7e33d4SMiao Xie return -ENOENT; 17912f7e33d4SMiao Xie } 17922f7e33d4SMiao Xie 17932f7e33d4SMiao Xie inode_item = &delayed_node->inode_item; 17942f7e33d4SMiao Xie 17952f2f43d3SEric W. Biederman i_uid_write(inode, btrfs_stack_inode_uid(inode_item)); 17962f2f43d3SEric W. Biederman i_gid_write(inode, btrfs_stack_inode_gid(inode_item)); 17972f7e33d4SMiao Xie btrfs_i_size_write(inode, btrfs_stack_inode_size(inode_item)); 17982f7e33d4SMiao Xie inode->i_mode = btrfs_stack_inode_mode(inode_item); 1799bfe86848SMiklos Szeredi set_nlink(inode, btrfs_stack_inode_nlink(inode_item)); 18002f7e33d4SMiao Xie inode_set_bytes(inode, btrfs_stack_inode_nbytes(inode_item)); 18012f7e33d4SMiao Xie BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item); 18026e17d30bSYang Dongsheng BTRFS_I(inode)->last_trans = btrfs_stack_inode_transid(inode_item); 18036e17d30bSYang Dongsheng 18040c4d2d95SJosef Bacik inode->i_version = btrfs_stack_inode_sequence(inode_item); 18052f7e33d4SMiao Xie inode->i_rdev = 0; 18062f7e33d4SMiao Xie *rdev = btrfs_stack_inode_rdev(inode_item); 18072f7e33d4SMiao Xie BTRFS_I(inode)->flags = btrfs_stack_inode_flags(inode_item); 18082f7e33d4SMiao Xie 1809a937b979SDavid Sterba inode->i_atime.tv_sec = btrfs_stack_timespec_sec(&inode_item->atime); 1810a937b979SDavid Sterba inode->i_atime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->atime); 18112f7e33d4SMiao Xie 1812a937b979SDavid Sterba inode->i_mtime.tv_sec = btrfs_stack_timespec_sec(&inode_item->mtime); 1813a937b979SDavid Sterba inode->i_mtime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->mtime); 18142f7e33d4SMiao Xie 1815a937b979SDavid Sterba inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(&inode_item->ctime); 1816a937b979SDavid Sterba inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->ctime); 18172f7e33d4SMiao Xie 18189cc97d64Schandan r BTRFS_I(inode)->i_otime.tv_sec = 18199cc97d64Schandan r btrfs_stack_timespec_sec(&inode_item->otime); 18209cc97d64Schandan r BTRFS_I(inode)->i_otime.tv_nsec = 18219cc97d64Schandan r btrfs_stack_timespec_nsec(&inode_item->otime); 18229cc97d64Schandan r 18232f7e33d4SMiao Xie inode->i_generation = BTRFS_I(inode)->generation; 18242f7e33d4SMiao Xie BTRFS_I(inode)->index_cnt = (u64)-1; 18252f7e33d4SMiao Xie 18262f7e33d4SMiao Xie mutex_unlock(&delayed_node->mutex); 18272f7e33d4SMiao Xie btrfs_release_delayed_node(delayed_node); 18282f7e33d4SMiao Xie return 0; 18292f7e33d4SMiao Xie } 18302f7e33d4SMiao Xie 183116cdcec7SMiao Xie int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, 183216cdcec7SMiao Xie struct btrfs_root *root, struct inode *inode) 183316cdcec7SMiao Xie { 183416cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node; 1835aa0467d8SDavid Sterba int ret = 0; 183616cdcec7SMiao Xie 183716cdcec7SMiao Xie delayed_node = btrfs_get_or_create_delayed_node(inode); 183816cdcec7SMiao Xie if (IS_ERR(delayed_node)) 183916cdcec7SMiao Xie return PTR_ERR(delayed_node); 184016cdcec7SMiao Xie 184116cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 18427cf35d91SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { 184316cdcec7SMiao Xie fill_stack_inode_item(trans, &delayed_node->inode_item, inode); 184416cdcec7SMiao Xie goto release_node; 184516cdcec7SMiao Xie } 184616cdcec7SMiao Xie 18477fd2ae21SJosef Bacik ret = btrfs_delayed_inode_reserve_metadata(trans, root, inode, 18487fd2ae21SJosef Bacik delayed_node); 1849c06a0e12SJosef Bacik if (ret) 1850c06a0e12SJosef Bacik goto release_node; 185116cdcec7SMiao Xie 185216cdcec7SMiao Xie fill_stack_inode_item(trans, &delayed_node->inode_item, inode); 18537cf35d91SMiao Xie set_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags); 185416cdcec7SMiao Xie delayed_node->count++; 185516cdcec7SMiao Xie atomic_inc(&root->fs_info->delayed_root->items); 185616cdcec7SMiao Xie release_node: 185716cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 185816cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 185916cdcec7SMiao Xie return ret; 186016cdcec7SMiao Xie } 186116cdcec7SMiao Xie 186267de1176SMiao Xie int btrfs_delayed_delete_inode_ref(struct inode *inode) 186367de1176SMiao Xie { 186467de1176SMiao Xie struct btrfs_delayed_node *delayed_node; 186567de1176SMiao Xie 18666f896054SChris Mason /* 18676f896054SChris Mason * we don't do delayed inode updates during log recovery because it 18686f896054SChris Mason * leads to enospc problems. This means we also can't do 18696f896054SChris Mason * delayed inode refs 18706f896054SChris Mason */ 1871afcdd129SJosef Bacik if (test_bit(BTRFS_FS_LOG_RECOVERING, 1872afcdd129SJosef Bacik &BTRFS_I(inode)->root->fs_info->flags)) 18736f896054SChris Mason return -EAGAIN; 18746f896054SChris Mason 187567de1176SMiao Xie delayed_node = btrfs_get_or_create_delayed_node(inode); 187667de1176SMiao Xie if (IS_ERR(delayed_node)) 187767de1176SMiao Xie return PTR_ERR(delayed_node); 187867de1176SMiao Xie 187967de1176SMiao Xie /* 188067de1176SMiao Xie * We don't reserve space for inode ref deletion is because: 188167de1176SMiao Xie * - We ONLY do async inode ref deletion for the inode who has only 188267de1176SMiao Xie * one link(i_nlink == 1), it means there is only one inode ref. 188367de1176SMiao Xie * And in most case, the inode ref and the inode item are in the 188467de1176SMiao Xie * same leaf, and we will deal with them at the same time. 188567de1176SMiao Xie * Since we are sure we will reserve the space for the inode item, 188667de1176SMiao Xie * it is unnecessary to reserve space for inode ref deletion. 188767de1176SMiao Xie * - If the inode ref and the inode item are not in the same leaf, 188867de1176SMiao Xie * We also needn't worry about enospc problem, because we reserve 188967de1176SMiao Xie * much more space for the inode update than it needs. 189067de1176SMiao Xie * - At the worst, we can steal some space from the global reservation. 189167de1176SMiao Xie * It is very rare. 189267de1176SMiao Xie */ 189367de1176SMiao Xie mutex_lock(&delayed_node->mutex); 189467de1176SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) 189567de1176SMiao Xie goto release_node; 189667de1176SMiao Xie 189767de1176SMiao Xie set_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); 189867de1176SMiao Xie delayed_node->count++; 189967de1176SMiao Xie atomic_inc(&BTRFS_I(inode)->root->fs_info->delayed_root->items); 190067de1176SMiao Xie release_node: 190167de1176SMiao Xie mutex_unlock(&delayed_node->mutex); 190267de1176SMiao Xie btrfs_release_delayed_node(delayed_node); 190367de1176SMiao Xie return 0; 190467de1176SMiao Xie } 190567de1176SMiao Xie 190616cdcec7SMiao Xie static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) 190716cdcec7SMiao Xie { 190816cdcec7SMiao Xie struct btrfs_root *root = delayed_node->root; 190916cdcec7SMiao Xie struct btrfs_delayed_item *curr_item, *prev_item; 191016cdcec7SMiao Xie 191116cdcec7SMiao Xie mutex_lock(&delayed_node->mutex); 191216cdcec7SMiao Xie curr_item = __btrfs_first_delayed_insertion_item(delayed_node); 191316cdcec7SMiao Xie while (curr_item) { 191416cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, curr_item); 191516cdcec7SMiao Xie prev_item = curr_item; 191616cdcec7SMiao Xie curr_item = __btrfs_next_delayed_item(prev_item); 191716cdcec7SMiao Xie btrfs_release_delayed_item(prev_item); 191816cdcec7SMiao Xie } 191916cdcec7SMiao Xie 192016cdcec7SMiao Xie curr_item = __btrfs_first_delayed_deletion_item(delayed_node); 192116cdcec7SMiao Xie while (curr_item) { 192216cdcec7SMiao Xie btrfs_delayed_item_release_metadata(root, curr_item); 192316cdcec7SMiao Xie prev_item = curr_item; 192416cdcec7SMiao Xie curr_item = __btrfs_next_delayed_item(prev_item); 192516cdcec7SMiao Xie btrfs_release_delayed_item(prev_item); 192616cdcec7SMiao Xie } 192716cdcec7SMiao Xie 192867de1176SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) 192967de1176SMiao Xie btrfs_release_delayed_iref(delayed_node); 193067de1176SMiao Xie 19317cf35d91SMiao Xie if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { 193216cdcec7SMiao Xie btrfs_delayed_inode_release_metadata(root, delayed_node); 193316cdcec7SMiao Xie btrfs_release_delayed_inode(delayed_node); 193416cdcec7SMiao Xie } 193516cdcec7SMiao Xie mutex_unlock(&delayed_node->mutex); 193616cdcec7SMiao Xie } 193716cdcec7SMiao Xie 193816cdcec7SMiao Xie void btrfs_kill_delayed_inode_items(struct inode *inode) 193916cdcec7SMiao Xie { 194016cdcec7SMiao Xie struct btrfs_delayed_node *delayed_node; 194116cdcec7SMiao Xie 194216cdcec7SMiao Xie delayed_node = btrfs_get_delayed_node(inode); 194316cdcec7SMiao Xie if (!delayed_node) 194416cdcec7SMiao Xie return; 194516cdcec7SMiao Xie 194616cdcec7SMiao Xie __btrfs_kill_delayed_node(delayed_node); 194716cdcec7SMiao Xie btrfs_release_delayed_node(delayed_node); 194816cdcec7SMiao Xie } 194916cdcec7SMiao Xie 195016cdcec7SMiao Xie void btrfs_kill_all_delayed_nodes(struct btrfs_root *root) 195116cdcec7SMiao Xie { 195216cdcec7SMiao Xie u64 inode_id = 0; 195316cdcec7SMiao Xie struct btrfs_delayed_node *delayed_nodes[8]; 195416cdcec7SMiao Xie int i, n; 195516cdcec7SMiao Xie 195616cdcec7SMiao Xie while (1) { 195716cdcec7SMiao Xie spin_lock(&root->inode_lock); 195816cdcec7SMiao Xie n = radix_tree_gang_lookup(&root->delayed_nodes_tree, 195916cdcec7SMiao Xie (void **)delayed_nodes, inode_id, 196016cdcec7SMiao Xie ARRAY_SIZE(delayed_nodes)); 196116cdcec7SMiao Xie if (!n) { 196216cdcec7SMiao Xie spin_unlock(&root->inode_lock); 196316cdcec7SMiao Xie break; 196416cdcec7SMiao Xie } 196516cdcec7SMiao Xie 196616cdcec7SMiao Xie inode_id = delayed_nodes[n - 1]->inode_id + 1; 196716cdcec7SMiao Xie 196816cdcec7SMiao Xie for (i = 0; i < n; i++) 196916cdcec7SMiao Xie atomic_inc(&delayed_nodes[i]->refs); 197016cdcec7SMiao Xie spin_unlock(&root->inode_lock); 197116cdcec7SMiao Xie 197216cdcec7SMiao Xie for (i = 0; i < n; i++) { 197316cdcec7SMiao Xie __btrfs_kill_delayed_node(delayed_nodes[i]); 197416cdcec7SMiao Xie btrfs_release_delayed_node(delayed_nodes[i]); 197516cdcec7SMiao Xie } 197616cdcec7SMiao Xie } 197716cdcec7SMiao Xie } 197867cde344SMiao Xie 197967cde344SMiao Xie void btrfs_destroy_delayed_inodes(struct btrfs_root *root) 198067cde344SMiao Xie { 198167cde344SMiao Xie struct btrfs_delayed_root *delayed_root; 198267cde344SMiao Xie struct btrfs_delayed_node *curr_node, *prev_node; 198367cde344SMiao Xie 198467cde344SMiao Xie delayed_root = btrfs_get_delayed_root(root); 198567cde344SMiao Xie 198667cde344SMiao Xie curr_node = btrfs_first_delayed_node(delayed_root); 198767cde344SMiao Xie while (curr_node) { 198867cde344SMiao Xie __btrfs_kill_delayed_node(curr_node); 198967cde344SMiao Xie 199067cde344SMiao Xie prev_node = curr_node; 199167cde344SMiao Xie curr_node = btrfs_next_delayed_node(curr_node); 199267cde344SMiao Xie btrfs_release_delayed_node(prev_node); 199367cde344SMiao Xie } 199467cde344SMiao Xie } 199567cde344SMiao Xie 1996