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1/*
2 * Copyright (C) 2011 Fujitsu. All rights reserved.
3 * Written by Miao Xie <miaox@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License v2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public
15 * License along with this program; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 021110-1307, USA.
18 */
19
20#ifndef __DELAYED_TREE_OPERATION_H
21#define __DELAYED_TREE_OPERATION_H
22
23#include <linux/rbtree.h>
24#include <linux/spinlock.h>
25#include <linux/mutex.h>
26#include <linux/list.h>
27#include <linux/wait.h>
28#include <linux/atomic.h>
29
30#include "ctree.h"
31
32/* types of the delayed item */
33#define BTRFS_DELAYED_INSERTION_ITEM 1
34#define BTRFS_DELAYED_DELETION_ITEM 2
35
36struct btrfs_delayed_root {
37 spinlock_t lock;
38 struct list_head node_list;
39 /*
40 * Used for delayed nodes which is waiting to be dealt with by the
41 * worker. If the delayed node is inserted into the work queue, we
42 * drop it from this list.
43 */
44 struct list_head prepare_list;
45 atomic_t items; /* for delayed items */
46 int nodes; /* for delayed nodes */
47 wait_queue_head_t wait;
48};
49
50struct btrfs_delayed_node {
51 u64 inode_id;
52 u64 bytes_reserved;
53 struct btrfs_root *root;
54 /* Used to add the node into the delayed root's node list. */
55 struct list_head n_list;
56 /*
57 * Used to add the node into the prepare list, the nodes in this list
58 * is waiting to be dealt with by the async worker.
59 */
60 struct list_head p_list;
61 struct rb_root ins_root;
62 struct rb_root del_root;
63 struct mutex mutex;
64 struct btrfs_inode_item inode_item;
65 atomic_t refs;
66 u64 index_cnt;
67 bool in_list;
68 bool inode_dirty;
69 int count;
70};
71
72struct btrfs_delayed_item {
73 struct rb_node rb_node;
74 struct btrfs_key key;
75 struct list_head tree_list; /* used for batch insert/delete items */
76 struct list_head readdir_list; /* used for readdir items */
77 u64 bytes_reserved;
78 struct btrfs_delayed_node *delayed_node;
79 atomic_t refs;
80 int ins_or_del;
81 u32 data_len;
82 char data[0];
83};
84
85static inline void btrfs_init_delayed_root(
86 struct btrfs_delayed_root *delayed_root)
87{
88 atomic_set(&delayed_root->items, 0);
89 delayed_root->nodes = 0;
90 spin_lock_init(&delayed_root->lock);
91 init_waitqueue_head(&delayed_root->wait);
92 INIT_LIST_HEAD(&delayed_root->node_list);
93 INIT_LIST_HEAD(&delayed_root->prepare_list);
94}
95
96int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
97 struct btrfs_root *root, const char *name,
98 int name_len, struct inode *dir,
99 struct btrfs_disk_key *disk_key, u8 type,
100 u64 index);
101
102int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root, struct inode *dir,
104 u64 index);
105
106int btrfs_inode_delayed_dir_index_count(struct inode *inode);
107
108int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
109 struct btrfs_root *root);
110
111void btrfs_balance_delayed_items(struct btrfs_root *root);
112
113int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
114 struct inode *inode);
115/* Used for evicting the inode. */
116void btrfs_remove_delayed_node(struct inode *inode);
117void btrfs_kill_delayed_inode_items(struct inode *inode);
118
119
120int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
121 struct btrfs_root *root, struct inode *inode);
122int btrfs_fill_inode(struct inode *inode, u32 *rdev);
123
124/* Used for drop dead root */
125void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
126
127/* Used for readdir() */
128void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
129 struct list_head *del_list);
130void btrfs_put_delayed_items(struct list_head *ins_list,
131 struct list_head *del_list);
132int btrfs_should_delete_dir_index(struct list_head *del_list,
133 u64 index);
134int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent,
135 filldir_t filldir,
136 struct list_head *ins_list);
137
138/* for init */
139int __init btrfs_delayed_inode_init(void);
140void btrfs_delayed_inode_exit(void);
141
142/* for debugging */
143void btrfs_assert_delayed_root_empty(struct btrfs_root *root);
144
145#endif
1/*
2 * Copyright (C) 2011 Fujitsu. All rights reserved.
3 * Written by Miao Xie <miaox@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License v2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public
15 * License along with this program; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 021110-1307, USA.
18 */
19
20#ifndef __DELAYED_TREE_OPERATION_H
21#define __DELAYED_TREE_OPERATION_H
22
23#include <linux/rbtree.h>
24#include <linux/spinlock.h>
25#include <linux/mutex.h>
26#include <linux/list.h>
27#include <linux/wait.h>
28#include <linux/atomic.h>
29
30#include "ctree.h"
31
32/* types of the delayed item */
33#define BTRFS_DELAYED_INSERTION_ITEM 1
34#define BTRFS_DELAYED_DELETION_ITEM 2
35
36struct btrfs_delayed_root {
37 spinlock_t lock;
38 struct list_head node_list;
39 /*
40 * Used for delayed nodes which is waiting to be dealt with by the
41 * worker. If the delayed node is inserted into the work queue, we
42 * drop it from this list.
43 */
44 struct list_head prepare_list;
45 atomic_t items; /* for delayed items */
46 atomic_t items_seq; /* for delayed items */
47 int nodes; /* for delayed nodes */
48 wait_queue_head_t wait;
49};
50
51#define BTRFS_DELAYED_NODE_IN_LIST 0
52#define BTRFS_DELAYED_NODE_INODE_DIRTY 1
53#define BTRFS_DELAYED_NODE_DEL_IREF 2
54
55struct btrfs_delayed_node {
56 u64 inode_id;
57 u64 bytes_reserved;
58 struct btrfs_root *root;
59 /* Used to add the node into the delayed root's node list. */
60 struct list_head n_list;
61 /*
62 * Used to add the node into the prepare list, the nodes in this list
63 * is waiting to be dealt with by the async worker.
64 */
65 struct list_head p_list;
66 struct rb_root ins_root;
67 struct rb_root del_root;
68 struct mutex mutex;
69 struct btrfs_inode_item inode_item;
70 atomic_t refs;
71 u64 index_cnt;
72 unsigned long flags;
73 int count;
74};
75
76struct btrfs_delayed_item {
77 struct rb_node rb_node;
78 struct btrfs_key key;
79 struct list_head tree_list; /* used for batch insert/delete items */
80 struct list_head readdir_list; /* used for readdir items */
81 u64 bytes_reserved;
82 struct btrfs_delayed_node *delayed_node;
83 atomic_t refs;
84 int ins_or_del;
85 u32 data_len;
86 char data[0];
87};
88
89static inline void btrfs_init_delayed_root(
90 struct btrfs_delayed_root *delayed_root)
91{
92 atomic_set(&delayed_root->items, 0);
93 atomic_set(&delayed_root->items_seq, 0);
94 delayed_root->nodes = 0;
95 spin_lock_init(&delayed_root->lock);
96 init_waitqueue_head(&delayed_root->wait);
97 INIT_LIST_HEAD(&delayed_root->node_list);
98 INIT_LIST_HEAD(&delayed_root->prepare_list);
99}
100
101int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
102 struct btrfs_root *root, const char *name,
103 int name_len, struct inode *dir,
104 struct btrfs_disk_key *disk_key, u8 type,
105 u64 index);
106
107int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
108 struct btrfs_root *root, struct inode *dir,
109 u64 index);
110
111int btrfs_inode_delayed_dir_index_count(struct inode *inode);
112
113int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
114 struct btrfs_root *root);
115int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans,
116 struct btrfs_root *root, int nr);
117
118void btrfs_balance_delayed_items(struct btrfs_root *root);
119
120int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
121 struct inode *inode);
122/* Used for evicting the inode. */
123void btrfs_remove_delayed_node(struct inode *inode);
124void btrfs_kill_delayed_inode_items(struct inode *inode);
125int btrfs_commit_inode_delayed_inode(struct inode *inode);
126
127
128int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
129 struct btrfs_root *root, struct inode *inode);
130int btrfs_fill_inode(struct inode *inode, u32 *rdev);
131int btrfs_delayed_delete_inode_ref(struct inode *inode);
132
133/* Used for drop dead root */
134void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
135
136/* Used for clean the transaction */
137void btrfs_destroy_delayed_inodes(struct btrfs_root *root);
138
139/* Used for readdir() */
140void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
141 struct list_head *del_list);
142void btrfs_put_delayed_items(struct list_head *ins_list,
143 struct list_head *del_list);
144int btrfs_should_delete_dir_index(struct list_head *del_list,
145 u64 index);
146int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
147 struct list_head *ins_list, bool *emitted);
148
149/* for init */
150int __init btrfs_delayed_inode_init(void);
151void btrfs_delayed_inode_exit(void);
152
153/* for debugging */
154void btrfs_assert_delayed_root_empty(struct btrfs_root *root);
155
156#endif