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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/* 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/rbtree.h>
11#include <linux/spinlock.h>
12#include <linux/mutex.h>
13#include <linux/list.h>
14#include <linux/wait.h>
15#include <linux/atomic.h>
16#include <linux/refcount.h>
17#include "ctree.h"
18
19enum btrfs_delayed_item_type {
20 BTRFS_DELAYED_INSERTION_ITEM,
21 BTRFS_DELAYED_DELETION_ITEM
22};
23
24struct btrfs_delayed_root {
25 spinlock_t lock;
26 struct list_head node_list;
27 /*
28 * Used for delayed nodes which is waiting to be dealt with by the
29 * worker. If the delayed node is inserted into the work queue, we
30 * drop it from this list.
31 */
32 struct list_head prepare_list;
33 atomic_t items; /* for delayed items */
34 atomic_t items_seq; /* for delayed items */
35 int nodes; /* for delayed nodes */
36 wait_queue_head_t wait;
37};
38
39#define BTRFS_DELAYED_NODE_IN_LIST 0
40#define BTRFS_DELAYED_NODE_INODE_DIRTY 1
41#define BTRFS_DELAYED_NODE_DEL_IREF 2
42
43struct btrfs_delayed_node {
44 u64 inode_id;
45 u64 bytes_reserved;
46 struct btrfs_root *root;
47 /* Used to add the node into the delayed root's node list. */
48 struct list_head n_list;
49 /*
50 * Used to add the node into the prepare list, the nodes in this list
51 * is waiting to be dealt with by the async worker.
52 */
53 struct list_head p_list;
54 struct rb_root_cached ins_root;
55 struct rb_root_cached del_root;
56 struct mutex mutex;
57 struct btrfs_inode_item inode_item;
58 refcount_t refs;
59 u64 index_cnt;
60 unsigned long flags;
61 int count;
62 /*
63 * The size of the next batch of dir index items to insert (if this
64 * node is from a directory inode). Protected by @mutex.
65 */
66 u32 curr_index_batch_size;
67 /*
68 * Number of leaves reserved for inserting dir index items (if this
69 * node belongs to a directory inode). This may be larger then the
70 * actual number of leaves we end up using. Protected by @mutex.
71 */
72 u32 index_item_leaves;
73};
74
75struct btrfs_delayed_item {
76 struct rb_node rb_node;
77 /* Offset value of the corresponding dir index key. */
78 u64 index;
79 struct list_head tree_list; /* used for batch insert/delete items */
80 struct list_head readdir_list; /* used for readdir items */
81 /*
82 * Used when logging a directory.
83 * Insertions and deletions to this list are protected by the parent
84 * delayed node's mutex.
85 */
86 struct list_head log_list;
87 u64 bytes_reserved;
88 struct btrfs_delayed_node *delayed_node;
89 refcount_t refs;
90 enum btrfs_delayed_item_type type:8;
91 /*
92 * Track if this delayed item was already logged.
93 * Protected by the mutex of the parent delayed inode.
94 */
95 bool logged;
96 /* The maximum leaf size is 64K, so u16 is more than enough. */
97 u16 data_len;
98 char data[];
99};
100
101static inline void btrfs_init_delayed_root(
102 struct btrfs_delayed_root *delayed_root)
103{
104 atomic_set(&delayed_root->items, 0);
105 atomic_set(&delayed_root->items_seq, 0);
106 delayed_root->nodes = 0;
107 spin_lock_init(&delayed_root->lock);
108 init_waitqueue_head(&delayed_root->wait);
109 INIT_LIST_HEAD(&delayed_root->node_list);
110 INIT_LIST_HEAD(&delayed_root->prepare_list);
111}
112
113int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
114 const char *name, int name_len,
115 struct btrfs_inode *dir,
116 struct btrfs_disk_key *disk_key, u8 flags,
117 u64 index);
118
119int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
120 struct btrfs_inode *dir, u64 index);
121
122int btrfs_inode_delayed_dir_index_count(struct btrfs_inode *inode);
123
124int btrfs_run_delayed_items(struct btrfs_trans_handle *trans);
125int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, int nr);
126
127void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info);
128
129int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
130 struct btrfs_inode *inode);
131/* Used for evicting the inode. */
132void btrfs_remove_delayed_node(struct btrfs_inode *inode);
133void btrfs_kill_delayed_inode_items(struct btrfs_inode *inode);
134int btrfs_commit_inode_delayed_inode(struct btrfs_inode *inode);
135
136
137int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
138 struct btrfs_root *root,
139 struct btrfs_inode *inode);
140int btrfs_fill_inode(struct inode *inode, u32 *rdev);
141int btrfs_delayed_delete_inode_ref(struct btrfs_inode *inode);
142
143/* Used for drop dead root */
144void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
145
146/* Used for clean the transaction */
147void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info);
148
149/* Used for readdir() */
150bool btrfs_readdir_get_delayed_items(struct inode *inode,
151 struct list_head *ins_list,
152 struct list_head *del_list);
153void btrfs_readdir_put_delayed_items(struct inode *inode,
154 struct list_head *ins_list,
155 struct list_head *del_list);
156int btrfs_should_delete_dir_index(struct list_head *del_list,
157 u64 index);
158int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
159 struct list_head *ins_list);
160
161/* Used during directory logging. */
162void btrfs_log_get_delayed_items(struct btrfs_inode *inode,
163 struct list_head *ins_list,
164 struct list_head *del_list);
165void btrfs_log_put_delayed_items(struct btrfs_inode *inode,
166 struct list_head *ins_list,
167 struct list_head *del_list);
168
169/* for init */
170int __init btrfs_delayed_inode_init(void);
171void __cold btrfs_delayed_inode_exit(void);
172
173/* for debugging */
174void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info);
175
176#endif