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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" |
a52d9a80 | 25 | |
f1ace244 | 26 | /* in memory btrfs inode */ |
2c90e5d6 | 27 | struct btrfs_inode { |
d352ac68 | 28 | /* which subvolume this inode belongs to */ |
d6e4a428 | 29 | struct btrfs_root *root; |
d352ac68 | 30 | |
d352ac68 CM |
31 | /* key used to find this inode on disk. This is used by the code |
32 | * to read in roots of subvolumes | |
33 | */ | |
d6e4a428 | 34 | struct btrfs_key location; |
d352ac68 CM |
35 | |
36 | /* the extent_tree has caches of all the extent mappings to disk */ | |
a52d9a80 | 37 | struct extent_map_tree extent_tree; |
d352ac68 CM |
38 | |
39 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 40 | struct extent_io_tree io_tree; |
d352ac68 CM |
41 | |
42 | /* special utility tree used to record which mirrors have already been | |
43 | * tried when checksums fail for a given block | |
44 | */ | |
7e38326f | 45 | struct extent_io_tree io_failure_tree; |
d352ac68 | 46 | |
d352ac68 | 47 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 48 | struct mutex log_mutex; |
d352ac68 CM |
49 | |
50 | /* used to order data wrt metadata */ | |
e6dcd2dc | 51 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 52 | |
7b128766 JB |
53 | /* for keeping track of orphaned inodes */ |
54 | struct list_head i_orphan; | |
55 | ||
d352ac68 CM |
56 | /* list of all the delalloc inodes in the FS. There are times we need |
57 | * to write all the delalloc pages to disk, and this list is used | |
58 | * to walk them all. | |
59 | */ | |
ea8c2819 CM |
60 | struct list_head delalloc_inodes; |
61 | ||
5a3f23d5 CM |
62 | /* |
63 | * list for tracking inodes that must be sent to disk before a | |
64 | * rename or truncate commit | |
65 | */ | |
66 | struct list_head ordered_operations; | |
67 | ||
5d4f98a2 YZ |
68 | /* node for the red-black tree that links inodes in subvolume root */ |
69 | struct rb_node rb_node; | |
70 | ||
6a63209f JB |
71 | /* the space_info for where this inode's data allocations are done */ |
72 | struct btrfs_space_info *space_info; | |
73 | ||
d352ac68 CM |
74 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
75 | * enough field for this. | |
76 | */ | |
e02119d5 CM |
77 | u64 generation; |
78 | ||
c3027eb5 CM |
79 | /* sequence number for NFS changes */ |
80 | u64 sequence; | |
81 | ||
15ee9bc7 JB |
82 | /* |
83 | * transid of the trans_handle that last modified this inode | |
84 | */ | |
85 | u64 last_trans; | |
257c62e1 CM |
86 | |
87 | /* | |
88 | * log transid when this inode was last modified | |
89 | */ | |
90 | u64 last_sub_trans; | |
91 | ||
e02119d5 CM |
92 | /* |
93 | * transid that last logged this inode | |
94 | */ | |
95 | u64 logged_trans; | |
49eb7e46 | 96 | |
d352ac68 CM |
97 | /* total number of bytes pending delalloc, used by stat to calc the |
98 | * real block usage of the file | |
99 | */ | |
9069218d | 100 | u64 delalloc_bytes; |
d352ac68 | 101 | |
6a63209f JB |
102 | /* total number of bytes that may be used for this inode for |
103 | * delalloc | |
104 | */ | |
105 | u64 reserved_bytes; | |
106 | ||
d352ac68 CM |
107 | /* |
108 | * the size of the file stored in the metadata on disk. data=ordered | |
109 | * means the in-memory i_size might be larger than the size on disk | |
110 | * because not all the blocks are written yet. | |
111 | */ | |
dbe674a9 | 112 | u64 disk_i_size; |
d352ac68 CM |
113 | |
114 | /* flags field from the on disk inode */ | |
b98b6767 | 115 | u32 flags; |
aec7477b JB |
116 | |
117 | /* | |
118 | * if this is a directory then index_cnt is the counter for the index | |
119 | * number for new files that are created | |
120 | */ | |
121 | u64 index_cnt; | |
d352ac68 | 122 | |
d2fb3437 YZ |
123 | /* the start of block group preferred for allocations. */ |
124 | u64 block_group; | |
125 | ||
12fcfd22 CM |
126 | /* the fsync log has some corner cases that mean we have to check |
127 | * directories to see if any unlinks have been done before | |
128 | * the directory was logged. See tree-log.c for all the | |
129 | * details | |
130 | */ | |
131 | u64 last_unlink_trans; | |
132 | ||
9ed74f2d | 133 | /* |
32c00aff JB |
134 | * Counters to keep track of the number of extent item's we may use due |
135 | * to delalloc and such. outstanding_extents is the number of extent | |
136 | * items we think we'll end up using, and reserved_extents is the number | |
137 | * of extent items we've reserved metadata for. | |
9ed74f2d | 138 | */ |
32c00aff | 139 | spinlock_t accounting_lock; |
0ca1f7ce | 140 | atomic_t outstanding_extents; |
32c00aff | 141 | int reserved_extents; |
9ed74f2d | 142 | |
5a3f23d5 CM |
143 | /* |
144 | * ordered_data_close is set by truncate when a file that used | |
145 | * to have good data has been truncated to zero. When it is set | |
146 | * the btrfs file release call will add this inode to the | |
147 | * ordered operations list so that we make sure to flush out any | |
148 | * new data the application may have written before commit. | |
149 | * | |
150 | * yes, its silly to have a single bitflag, but we might grow more | |
151 | * of these. | |
152 | */ | |
153 | unsigned ordered_data_close:1; | |
d68fc57b | 154 | unsigned orphan_meta_reserved:1; |
4df27c4d | 155 | unsigned dummy_inode:1; |
5a3f23d5 | 156 | |
1e701a32 CM |
157 | /* |
158 | * always compress this one file | |
159 | */ | |
261507a0 | 160 | unsigned force_compress:4; |
1e701a32 | 161 | |
d352ac68 | 162 | struct inode vfs_inode; |
2c90e5d6 | 163 | }; |
dbe674a9 | 164 | |
2c90e5d6 CM |
165 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
166 | { | |
167 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
168 | } | |
169 | ||
dbe674a9 CM |
170 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
171 | { | |
c2167754 | 172 | i_size_write(inode, size); |
dbe674a9 CM |
173 | BTRFS_I(inode)->disk_i_size = size; |
174 | } | |
175 | ||
2c90e5d6 | 176 | #endif |