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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2011 Fujitsu. All rights reserved.
4 * Written by Miao Xie <miaox@cn.fujitsu.com>
5 */
6
7#ifndef BTRFS_DELAYED_INODE_H
8#define BTRFS_DELAYED_INODE_H
9
10#include <linux/types.h>
11#include <linux/rbtree.h>
12#include <linux/spinlock.h>
13#include <linux/mutex.h>
14#include <linux/list.h>
15#include <linux/wait.h>
16#include <linux/fs.h>
17#include <linux/atomic.h>
18#include <linux/refcount.h>
19#include "ctree.h"
20
21struct btrfs_disk_key;
22struct btrfs_fs_info;
23struct btrfs_inode;
24struct btrfs_root;
25struct btrfs_trans_handle;
26
27enum btrfs_delayed_item_type {
28 BTRFS_DELAYED_INSERTION_ITEM,
29 BTRFS_DELAYED_DELETION_ITEM
30};
31
32struct btrfs_delayed_root {
33 spinlock_t lock;
34 struct list_head node_list;
35 /*
36 * Used for delayed nodes which is waiting to be dealt with by the
37 * worker. If the delayed node is inserted into the work queue, we
38 * drop it from this list.
39 */
40 struct list_head prepare_list;
41 atomic_t items; /* for delayed items */
42 atomic_t items_seq; /* for delayed items */
43 int nodes; /* for delayed nodes */
44 wait_queue_head_t wait;
45};
46
47#define BTRFS_DELAYED_NODE_IN_LIST 0
48#define BTRFS_DELAYED_NODE_INODE_DIRTY 1
49#define BTRFS_DELAYED_NODE_DEL_IREF 2
50
51struct btrfs_delayed_node {
52 u64 inode_id;
53 u64 bytes_reserved;
54 struct btrfs_root *root;
55 /* Used to add the node into the delayed root's node list. */
56 struct list_head n_list;
57 /*
58 * Used to add the node into the prepare list, the nodes in this list
59 * is waiting to be dealt with by the async worker.
60 */
61 struct list_head p_list;
62 struct rb_root_cached ins_root;
63 struct rb_root_cached del_root;
64 struct mutex mutex;
65 struct btrfs_inode_item inode_item;
66 refcount_t refs;
67 int count;
68 u64 index_cnt;
69 unsigned long flags;
70 /*
71 * The size of the next batch of dir index items to insert (if this
72 * node is from a directory inode). Protected by @mutex.
73 */
74 u32 curr_index_batch_size;
75 /*
76 * Number of leaves reserved for inserting dir index items (if this
77 * node belongs to a directory inode). This may be larger then the
78 * actual number of leaves we end up using. Protected by @mutex.
79 */
80 u32 index_item_leaves;
81};
82
83struct btrfs_delayed_item {
84 struct rb_node rb_node;
85 /* Offset value of the corresponding dir index key. */
86 u64 index;
87 struct list_head tree_list; /* used for batch insert/delete items */
88 struct list_head readdir_list; /* used for readdir items */
89 /*
90 * Used when logging a directory.
91 * Insertions and deletions to this list are protected by the parent
92 * delayed node's mutex.
93 */
94 struct list_head log_list;
95 u64 bytes_reserved;
96 struct btrfs_delayed_node *delayed_node;
97 refcount_t refs;
98 enum btrfs_delayed_item_type type:8;
99 /*
100 * Track if this delayed item was already logged.
101 * Protected by the mutex of the parent delayed inode.
102 */
103 bool logged;
104 /* The maximum leaf size is 64K, so u16 is more than enough. */
105 u16 data_len;
106 char data[] __counted_by(data_len);
107};
108
109void btrfs_init_delayed_root(struct btrfs_delayed_root *delayed_root);
110int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
111 const char *name, int name_len,
112 struct btrfs_inode *dir,
113 const struct btrfs_disk_key *disk_key, u8 flags,
114 u64 index);
115
116int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
117 struct btrfs_inode *dir, u64 index);
118
119int btrfs_inode_delayed_dir_index_count(struct btrfs_inode *inode);
120
121int btrfs_run_delayed_items(struct btrfs_trans_handle *trans);
122int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, int nr);
123
124void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info);
125
126int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
127 struct btrfs_inode *inode);
128/* Used for evicting the inode. */
129void btrfs_remove_delayed_node(struct btrfs_inode *inode);
130void btrfs_kill_delayed_inode_items(struct btrfs_inode *inode);
131int btrfs_commit_inode_delayed_inode(struct btrfs_inode *inode);
132
133
134int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
135 struct btrfs_inode *inode);
136int btrfs_fill_inode(struct inode *inode, u32 *rdev);
137int btrfs_delayed_delete_inode_ref(struct btrfs_inode *inode);
138
139/* Used for drop dead root */
140void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
141
142/* Used for clean the transaction */
143void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info);
144
145/* Used for readdir() */
146bool btrfs_readdir_get_delayed_items(struct btrfs_inode *inode,
147 u64 last_index,
148 struct list_head *ins_list,
149 struct list_head *del_list);
150void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode,
151 struct list_head *ins_list,
152 struct list_head *del_list);
153int btrfs_should_delete_dir_index(const struct list_head *del_list,
154 u64 index);
155int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
156 const struct list_head *ins_list);
157
158/* Used during directory logging. */
159void btrfs_log_get_delayed_items(struct btrfs_inode *inode,
160 struct list_head *ins_list,
161 struct list_head *del_list);
162void btrfs_log_put_delayed_items(struct btrfs_inode *inode,
163 struct list_head *ins_list,
164 struct list_head *del_list);
165
166/* for init */
167int __init btrfs_delayed_inode_init(void);
168void __cold btrfs_delayed_inode_exit(void);
169
170/* for debugging */
171void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info);
172
173#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_fs_info *fs_info,
103 const char *name, int name_len,
104 struct inode *dir,
105 struct btrfs_disk_key *disk_key, u8 type,
106 u64 index);
107
108int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
109 struct btrfs_fs_info *fs_info,
110 struct inode *dir, u64 index);
111
112int btrfs_inode_delayed_dir_index_count(struct inode *inode);
113
114int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
115 struct btrfs_fs_info *fs_info);
116int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans,
117 struct btrfs_fs_info *fs_info, int nr);
118
119void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info);
120
121int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
122 struct inode *inode);
123/* Used for evicting the inode. */
124void btrfs_remove_delayed_node(struct inode *inode);
125void btrfs_kill_delayed_inode_items(struct inode *inode);
126int btrfs_commit_inode_delayed_inode(struct inode *inode);
127
128
129int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
130 struct btrfs_root *root, struct inode *inode);
131int btrfs_fill_inode(struct inode *inode, u32 *rdev);
132int btrfs_delayed_delete_inode_ref(struct inode *inode);
133
134/* Used for drop dead root */
135void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
136
137/* Used for clean the transaction */
138void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info);
139
140/* Used for readdir() */
141bool btrfs_readdir_get_delayed_items(struct inode *inode,
142 struct list_head *ins_list,
143 struct list_head *del_list);
144void btrfs_readdir_put_delayed_items(struct inode *inode,
145 struct list_head *ins_list,
146 struct list_head *del_list);
147int btrfs_should_delete_dir_index(struct list_head *del_list,
148 u64 index);
149int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
150 struct list_head *ins_list);
151
152/* for init */
153int __init btrfs_delayed_inode_init(void);
154void btrfs_delayed_inode_exit(void);
155
156/* for debugging */
157void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info);
158
159#endif