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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 | ||
19 | #ifndef __BTRFS_I__ | |
20 | #define __BTRFS_I__ | |
21 | ||
22 | #include "extent_map.h" | |
23 | #include "extent_io.h" | |
24 | #include "ordered-data.h" | |
25 | ||
26 | /* in memory btrfs inode */ | |
27 | struct btrfs_inode { | |
28 | /* which subvolume this inode belongs to */ | |
29 | struct btrfs_root *root; | |
30 | ||
31 | /* the block group preferred for allocations. This pointer is buggy | |
32 | * and needs to be replaced with a bytenr instead | |
33 | */ | |
34 | struct btrfs_block_group_cache *block_group; | |
35 | ||
36 | /* key used to find this inode on disk. This is used by the code | |
37 | * to read in roots of subvolumes | |
38 | */ | |
39 | struct btrfs_key location; | |
40 | ||
41 | /* the extent_tree has caches of all the extent mappings to disk */ | |
42 | struct extent_map_tree extent_tree; | |
43 | ||
44 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
45 | struct extent_io_tree io_tree; | |
46 | ||
47 | /* special utility tree used to record which mirrors have already been | |
48 | * tried when checksums fail for a given block | |
49 | */ | |
50 | struct extent_io_tree io_failure_tree; | |
51 | ||
52 | /* held while inesrting or deleting extents from files */ | |
53 | struct mutex extent_mutex; | |
54 | ||
55 | /* held while logging the inode in tree-log.c */ | |
56 | struct mutex log_mutex; | |
57 | ||
58 | /* used to order data wrt metadata */ | |
59 | struct btrfs_ordered_inode_tree ordered_tree; | |
60 | ||
61 | /* standard acl pointers */ | |
62 | struct posix_acl *i_acl; | |
63 | struct posix_acl *i_default_acl; | |
64 | ||
65 | /* for keeping track of orphaned inodes */ | |
66 | struct list_head i_orphan; | |
67 | ||
68 | /* list of all the delalloc inodes in the FS. There are times we need | |
69 | * to write all the delalloc pages to disk, and this list is used | |
70 | * to walk them all. | |
71 | */ | |
72 | struct list_head delalloc_inodes; | |
73 | ||
74 | /* full 64 bit generation number, struct vfs_inode doesn't have a big | |
75 | * enough field for this. | |
76 | */ | |
77 | u64 generation; | |
78 | ||
79 | /* sequence number for NFS changes */ | |
80 | u64 sequence; | |
81 | ||
82 | /* | |
83 | * transid of the trans_handle that last modified this inode | |
84 | */ | |
85 | u64 last_trans; | |
86 | /* | |
87 | * transid that last logged this inode | |
88 | */ | |
89 | u64 logged_trans; | |
90 | ||
91 | /* | |
92 | * trans that last made a change that should be fully fsync'd. This | |
93 | * gets reset to zero each time the inode is logged | |
94 | */ | |
95 | u64 log_dirty_trans; | |
96 | ||
97 | /* total number of bytes pending delalloc, used by stat to calc the | |
98 | * real block usage of the file | |
99 | */ | |
100 | u64 delalloc_bytes; | |
101 | ||
102 | /* | |
103 | * the size of the file stored in the metadata on disk. data=ordered | |
104 | * means the in-memory i_size might be larger than the size on disk | |
105 | * because not all the blocks are written yet. | |
106 | */ | |
107 | u64 disk_i_size; | |
108 | ||
109 | /* flags field from the on disk inode */ | |
110 | u32 flags; | |
111 | ||
112 | /* | |
113 | * if this is a directory then index_cnt is the counter for the index | |
114 | * number for new files that are created | |
115 | */ | |
116 | u64 index_cnt; | |
117 | ||
118 | struct inode vfs_inode; | |
119 | }; | |
120 | ||
121 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) | |
122 | { | |
123 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
124 | } | |
125 | ||
126 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) | |
127 | { | |
128 | inode->i_size = size; | |
129 | BTRFS_I(inode)->disk_i_size = size; | |
130 | } | |
131 | ||
132 | ||
133 | #endif |