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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
2c90e5d6 CM |
19 | #ifndef __BTRFS_I__ |
20 | #define __BTRFS_I__ | |
21 | ||
a52d9a80 | 22 | #include "extent_map.h" |
d1310b2e | 23 | #include "extent_io.h" |
e6dcd2dc | 24 | #include "ordered-data.h" |
16cdcec7 | 25 | #include "delayed-inode.h" |
a52d9a80 | 26 | |
72ac3c0d JB |
27 | /* |
28 | * ordered_data_close is set by truncate when a file that used | |
29 | * to have good data has been truncated to zero. When it is set | |
30 | * the btrfs file release call will add this inode to the | |
31 | * ordered operations list so that we make sure to flush out any | |
32 | * new data the application may have written before commit. | |
33 | */ | |
34 | #define BTRFS_INODE_ORDERED_DATA_CLOSE 0 | |
35 | #define BTRFS_INODE_ORPHAN_META_RESERVED 1 | |
36 | #define BTRFS_INODE_DUMMY 2 | |
37 | #define BTRFS_INODE_IN_DEFRAG 3 | |
38 | #define BTRFS_INODE_DELALLOC_META_RESERVED 4 | |
8a35d95f | 39 | #define BTRFS_INODE_HAS_ORPHAN_ITEM 5 |
7ddf5a42 | 40 | #define BTRFS_INODE_HAS_ASYNC_EXTENT 6 |
72ac3c0d | 41 | |
f1ace244 | 42 | /* in memory btrfs inode */ |
2c90e5d6 | 43 | struct btrfs_inode { |
d352ac68 | 44 | /* which subvolume this inode belongs to */ |
d6e4a428 | 45 | struct btrfs_root *root; |
d352ac68 | 46 | |
d352ac68 CM |
47 | /* key used to find this inode on disk. This is used by the code |
48 | * to read in roots of subvolumes | |
49 | */ | |
d6e4a428 | 50 | struct btrfs_key location; |
d352ac68 | 51 | |
9e0baf60 JB |
52 | /* Lock for counters */ |
53 | spinlock_t lock; | |
54 | ||
d352ac68 | 55 | /* the extent_tree has caches of all the extent mappings to disk */ |
a52d9a80 | 56 | struct extent_map_tree extent_tree; |
d352ac68 CM |
57 | |
58 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 59 | struct extent_io_tree io_tree; |
d352ac68 CM |
60 | |
61 | /* special utility tree used to record which mirrors have already been | |
62 | * tried when checksums fail for a given block | |
63 | */ | |
7e38326f | 64 | struct extent_io_tree io_failure_tree; |
d352ac68 | 65 | |
d352ac68 | 66 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 67 | struct mutex log_mutex; |
d352ac68 | 68 | |
f248679e JB |
69 | /* held while doing delalloc reservations */ |
70 | struct mutex delalloc_mutex; | |
71 | ||
d352ac68 | 72 | /* used to order data wrt metadata */ |
e6dcd2dc | 73 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 74 | |
d352ac68 CM |
75 | /* list of all the delalloc inodes in the FS. There are times we need |
76 | * to write all the delalloc pages to disk, and this list is used | |
77 | * to walk them all. | |
78 | */ | |
ea8c2819 CM |
79 | struct list_head delalloc_inodes; |
80 | ||
5a3f23d5 CM |
81 | /* |
82 | * list for tracking inodes that must be sent to disk before a | |
83 | * rename or truncate commit | |
84 | */ | |
85 | struct list_head ordered_operations; | |
86 | ||
5d4f98a2 YZ |
87 | /* node for the red-black tree that links inodes in subvolume root */ |
88 | struct rb_node rb_node; | |
89 | ||
6a63209f JB |
90 | /* the space_info for where this inode's data allocations are done */ |
91 | struct btrfs_space_info *space_info; | |
92 | ||
72ac3c0d JB |
93 | unsigned long runtime_flags; |
94 | ||
d352ac68 CM |
95 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
96 | * enough field for this. | |
97 | */ | |
e02119d5 CM |
98 | u64 generation; |
99 | ||
15ee9bc7 JB |
100 | /* |
101 | * transid of the trans_handle that last modified this inode | |
102 | */ | |
103 | u64 last_trans; | |
257c62e1 CM |
104 | |
105 | /* | |
106 | * log transid when this inode was last modified | |
107 | */ | |
108 | u64 last_sub_trans; | |
109 | ||
e02119d5 CM |
110 | /* |
111 | * transid that last logged this inode | |
112 | */ | |
113 | u64 logged_trans; | |
49eb7e46 | 114 | |
d352ac68 CM |
115 | /* total number of bytes pending delalloc, used by stat to calc the |
116 | * real block usage of the file | |
117 | */ | |
9069218d | 118 | u64 delalloc_bytes; |
d352ac68 CM |
119 | |
120 | /* | |
121 | * the size of the file stored in the metadata on disk. data=ordered | |
122 | * means the in-memory i_size might be larger than the size on disk | |
123 | * because not all the blocks are written yet. | |
124 | */ | |
dbe674a9 | 125 | u64 disk_i_size; |
d352ac68 | 126 | |
aec7477b JB |
127 | /* |
128 | * if this is a directory then index_cnt is the counter for the index | |
129 | * number for new files that are created | |
130 | */ | |
131 | u64 index_cnt; | |
d352ac68 | 132 | |
12fcfd22 CM |
133 | /* the fsync log has some corner cases that mean we have to check |
134 | * directories to see if any unlinks have been done before | |
135 | * the directory was logged. See tree-log.c for all the | |
136 | * details | |
137 | */ | |
138 | u64 last_unlink_trans; | |
139 | ||
7709cde3 JB |
140 | /* |
141 | * Number of bytes outstanding that are going to need csums. This is | |
142 | * used in ENOSPC accounting. | |
143 | */ | |
144 | u64 csum_bytes; | |
145 | ||
f1bdcc0a JB |
146 | /* flags field from the on disk inode */ |
147 | u32 flags; | |
148 | ||
9ed74f2d | 149 | /* |
32c00aff JB |
150 | * Counters to keep track of the number of extent item's we may use due |
151 | * to delalloc and such. outstanding_extents is the number of extent | |
152 | * items we think we'll end up using, and reserved_extents is the number | |
153 | * of extent items we've reserved metadata for. | |
9ed74f2d | 154 | */ |
9e0baf60 JB |
155 | unsigned outstanding_extents; |
156 | unsigned reserved_extents; | |
9ed74f2d | 157 | |
1e701a32 CM |
158 | /* |
159 | * always compress this one file | |
160 | */ | |
72ac3c0d | 161 | unsigned force_compress; |
1e701a32 | 162 | |
16cdcec7 MX |
163 | struct btrfs_delayed_node *delayed_node; |
164 | ||
d352ac68 | 165 | struct inode vfs_inode; |
2c90e5d6 | 166 | }; |
dbe674a9 | 167 | |
16cdcec7 MX |
168 | extern unsigned char btrfs_filetype_table[]; |
169 | ||
2c90e5d6 CM |
170 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
171 | { | |
172 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
173 | } | |
174 | ||
33345d01 LZ |
175 | static inline u64 btrfs_ino(struct inode *inode) |
176 | { | |
177 | u64 ino = BTRFS_I(inode)->location.objectid; | |
178 | ||
14c7cca7 LB |
179 | /* |
180 | * !ino: btree_inode | |
181 | * type == BTRFS_ROOT_ITEM_KEY: subvol dir | |
182 | */ | |
183 | if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) | |
33345d01 LZ |
184 | ino = inode->i_ino; |
185 | return ino; | |
186 | } | |
187 | ||
dbe674a9 CM |
188 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
189 | { | |
c2167754 | 190 | i_size_write(inode, size); |
dbe674a9 CM |
191 | BTRFS_I(inode)->disk_i_size = size; |
192 | } | |
193 | ||
2cf8572d CM |
194 | static inline bool btrfs_is_free_space_inode(struct btrfs_root *root, |
195 | struct inode *inode) | |
196 | { | |
197 | if (root == root->fs_info->tree_root || | |
198 | BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) | |
199 | return true; | |
200 | return false; | |
201 | } | |
202 | ||
22ee6985 JB |
203 | static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) |
204 | { | |
205 | struct btrfs_root *root = BTRFS_I(inode)->root; | |
206 | int ret = 0; | |
207 | ||
208 | mutex_lock(&root->log_mutex); | |
209 | if (BTRFS_I(inode)->logged_trans == generation && | |
210 | BTRFS_I(inode)->last_sub_trans <= root->last_log_commit) | |
211 | ret = 1; | |
212 | mutex_unlock(&root->log_mutex); | |
213 | return ret; | |
214 | } | |
215 | ||
2c90e5d6 | 216 | #endif |