]>
Commit | Line | Data |
---|---|---|
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 |
5dc562c5 | 41 | #define BTRFS_INODE_NEEDS_FULL_SYNC 7 |
e9976151 | 42 | #define BTRFS_INODE_COPY_EVERYTHING 8 |
72ac3c0d | 43 | |
f1ace244 | 44 | /* in memory btrfs inode */ |
2c90e5d6 | 45 | struct btrfs_inode { |
d352ac68 | 46 | /* which subvolume this inode belongs to */ |
d6e4a428 | 47 | struct btrfs_root *root; |
d352ac68 | 48 | |
d352ac68 CM |
49 | /* key used to find this inode on disk. This is used by the code |
50 | * to read in roots of subvolumes | |
51 | */ | |
d6e4a428 | 52 | struct btrfs_key location; |
d352ac68 | 53 | |
9e0baf60 JB |
54 | /* Lock for counters */ |
55 | spinlock_t lock; | |
56 | ||
d352ac68 | 57 | /* the extent_tree has caches of all the extent mappings to disk */ |
a52d9a80 | 58 | struct extent_map_tree extent_tree; |
d352ac68 CM |
59 | |
60 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 61 | struct extent_io_tree io_tree; |
d352ac68 CM |
62 | |
63 | /* special utility tree used to record which mirrors have already been | |
64 | * tried when checksums fail for a given block | |
65 | */ | |
7e38326f | 66 | struct extent_io_tree io_failure_tree; |
d352ac68 | 67 | |
d352ac68 | 68 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 69 | struct mutex log_mutex; |
d352ac68 | 70 | |
f248679e JB |
71 | /* held while doing delalloc reservations */ |
72 | struct mutex delalloc_mutex; | |
73 | ||
d352ac68 | 74 | /* used to order data wrt metadata */ |
e6dcd2dc | 75 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 76 | |
d352ac68 CM |
77 | /* list of all the delalloc inodes in the FS. There are times we need |
78 | * to write all the delalloc pages to disk, and this list is used | |
79 | * to walk them all. | |
80 | */ | |
ea8c2819 CM |
81 | struct list_head delalloc_inodes; |
82 | ||
5a3f23d5 CM |
83 | /* |
84 | * list for tracking inodes that must be sent to disk before a | |
85 | * rename or truncate commit | |
86 | */ | |
87 | struct list_head ordered_operations; | |
88 | ||
5d4f98a2 YZ |
89 | /* node for the red-black tree that links inodes in subvolume root */ |
90 | struct rb_node rb_node; | |
91 | ||
72ac3c0d JB |
92 | unsigned long runtime_flags; |
93 | ||
b812ce28 JB |
94 | /* Keep track of who's O_SYNC/fsycing currently */ |
95 | atomic_t sync_writers; | |
96 | ||
d352ac68 CM |
97 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
98 | * enough field for this. | |
99 | */ | |
e02119d5 CM |
100 | u64 generation; |
101 | ||
15ee9bc7 JB |
102 | /* |
103 | * transid of the trans_handle that last modified this inode | |
104 | */ | |
105 | u64 last_trans; | |
257c62e1 CM |
106 | |
107 | /* | |
108 | * log transid when this inode was last modified | |
109 | */ | |
110 | u64 last_sub_trans; | |
111 | ||
e02119d5 CM |
112 | /* |
113 | * transid that last logged this inode | |
114 | */ | |
115 | u64 logged_trans; | |
49eb7e46 | 116 | |
d352ac68 CM |
117 | /* total number of bytes pending delalloc, used by stat to calc the |
118 | * real block usage of the file | |
119 | */ | |
9069218d | 120 | u64 delalloc_bytes; |
d352ac68 CM |
121 | |
122 | /* | |
123 | * the size of the file stored in the metadata on disk. data=ordered | |
124 | * means the in-memory i_size might be larger than the size on disk | |
125 | * because not all the blocks are written yet. | |
126 | */ | |
dbe674a9 | 127 | u64 disk_i_size; |
d352ac68 | 128 | |
aec7477b JB |
129 | /* |
130 | * if this is a directory then index_cnt is the counter for the index | |
131 | * number for new files that are created | |
132 | */ | |
133 | u64 index_cnt; | |
d352ac68 | 134 | |
12fcfd22 CM |
135 | /* the fsync log has some corner cases that mean we have to check |
136 | * directories to see if any unlinks have been done before | |
137 | * the directory was logged. See tree-log.c for all the | |
138 | * details | |
139 | */ | |
140 | u64 last_unlink_trans; | |
141 | ||
7709cde3 JB |
142 | /* |
143 | * Number of bytes outstanding that are going to need csums. This is | |
144 | * used in ENOSPC accounting. | |
145 | */ | |
146 | u64 csum_bytes; | |
147 | ||
f1bdcc0a JB |
148 | /* flags field from the on disk inode */ |
149 | u32 flags; | |
150 | ||
46d8bc34 LB |
151 | /* a local copy of root's last_log_commit */ |
152 | unsigned long last_log_commit; | |
153 | ||
9ed74f2d | 154 | /* |
32c00aff JB |
155 | * Counters to keep track of the number of extent item's we may use due |
156 | * to delalloc and such. outstanding_extents is the number of extent | |
157 | * items we think we'll end up using, and reserved_extents is the number | |
158 | * of extent items we've reserved metadata for. | |
9ed74f2d | 159 | */ |
9e0baf60 JB |
160 | unsigned outstanding_extents; |
161 | unsigned reserved_extents; | |
9ed74f2d | 162 | |
1e701a32 CM |
163 | /* |
164 | * always compress this one file | |
165 | */ | |
72ac3c0d | 166 | unsigned force_compress; |
1e701a32 | 167 | |
16cdcec7 MX |
168 | struct btrfs_delayed_node *delayed_node; |
169 | ||
d352ac68 | 170 | struct inode vfs_inode; |
2c90e5d6 | 171 | }; |
dbe674a9 | 172 | |
16cdcec7 MX |
173 | extern unsigned char btrfs_filetype_table[]; |
174 | ||
2c90e5d6 CM |
175 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
176 | { | |
177 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
178 | } | |
179 | ||
33345d01 LZ |
180 | static inline u64 btrfs_ino(struct inode *inode) |
181 | { | |
182 | u64 ino = BTRFS_I(inode)->location.objectid; | |
183 | ||
14c7cca7 LB |
184 | /* |
185 | * !ino: btree_inode | |
186 | * type == BTRFS_ROOT_ITEM_KEY: subvol dir | |
187 | */ | |
188 | if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) | |
33345d01 LZ |
189 | ino = inode->i_ino; |
190 | return ino; | |
191 | } | |
192 | ||
dbe674a9 CM |
193 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
194 | { | |
c2167754 | 195 | i_size_write(inode, size); |
dbe674a9 CM |
196 | BTRFS_I(inode)->disk_i_size = size; |
197 | } | |
198 | ||
83eea1f1 | 199 | static inline bool btrfs_is_free_space_inode(struct inode *inode) |
2cf8572d | 200 | { |
83eea1f1 LB |
201 | struct btrfs_root *root = BTRFS_I(inode)->root; |
202 | ||
51a8cf9d LB |
203 | if (root == root->fs_info->tree_root && |
204 | btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID) | |
205 | return true; | |
206 | if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) | |
2cf8572d CM |
207 | return true; |
208 | return false; | |
209 | } | |
210 | ||
22ee6985 JB |
211 | static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) |
212 | { | |
22ee6985 | 213 | if (BTRFS_I(inode)->logged_trans == generation && |
46d8bc34 LB |
214 | BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit) |
215 | return 1; | |
216 | return 0; | |
22ee6985 JB |
217 | } |
218 | ||
2c90e5d6 | 219 | #endif |