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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 | |
f1ace244 | 27 | /* in memory btrfs inode */ |
2c90e5d6 | 28 | struct btrfs_inode { |
d352ac68 | 29 | /* which subvolume this inode belongs to */ |
d6e4a428 | 30 | struct btrfs_root *root; |
d352ac68 | 31 | |
d352ac68 CM |
32 | /* key used to find this inode on disk. This is used by the code |
33 | * to read in roots of subvolumes | |
34 | */ | |
d6e4a428 | 35 | struct btrfs_key location; |
d352ac68 | 36 | |
9e0baf60 JB |
37 | /* Lock for counters */ |
38 | spinlock_t lock; | |
39 | ||
d352ac68 | 40 | /* the extent_tree has caches of all the extent mappings to disk */ |
a52d9a80 | 41 | struct extent_map_tree extent_tree; |
d352ac68 CM |
42 | |
43 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 44 | struct extent_io_tree io_tree; |
d352ac68 CM |
45 | |
46 | /* special utility tree used to record which mirrors have already been | |
47 | * tried when checksums fail for a given block | |
48 | */ | |
7e38326f | 49 | struct extent_io_tree io_failure_tree; |
d352ac68 | 50 | |
d352ac68 | 51 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 52 | struct mutex log_mutex; |
d352ac68 CM |
53 | |
54 | /* used to order data wrt metadata */ | |
e6dcd2dc | 55 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 56 | |
7b128766 JB |
57 | /* for keeping track of orphaned inodes */ |
58 | struct list_head i_orphan; | |
59 | ||
d352ac68 CM |
60 | /* list of all the delalloc inodes in the FS. There are times we need |
61 | * to write all the delalloc pages to disk, and this list is used | |
62 | * to walk them all. | |
63 | */ | |
ea8c2819 CM |
64 | struct list_head delalloc_inodes; |
65 | ||
5a3f23d5 CM |
66 | /* |
67 | * list for tracking inodes that must be sent to disk before a | |
68 | * rename or truncate commit | |
69 | */ | |
70 | struct list_head ordered_operations; | |
71 | ||
5d4f98a2 YZ |
72 | /* node for the red-black tree that links inodes in subvolume root */ |
73 | struct rb_node rb_node; | |
74 | ||
6a63209f JB |
75 | /* the space_info for where this inode's data allocations are done */ |
76 | struct btrfs_space_info *space_info; | |
77 | ||
d352ac68 CM |
78 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
79 | * enough field for this. | |
80 | */ | |
e02119d5 CM |
81 | u64 generation; |
82 | ||
c3027eb5 CM |
83 | /* sequence number for NFS changes */ |
84 | u64 sequence; | |
85 | ||
15ee9bc7 JB |
86 | /* |
87 | * transid of the trans_handle that last modified this inode | |
88 | */ | |
89 | u64 last_trans; | |
257c62e1 CM |
90 | |
91 | /* | |
92 | * log transid when this inode was last modified | |
93 | */ | |
94 | u64 last_sub_trans; | |
95 | ||
e02119d5 CM |
96 | /* |
97 | * transid that last logged this inode | |
98 | */ | |
99 | u64 logged_trans; | |
49eb7e46 | 100 | |
d352ac68 CM |
101 | /* total number of bytes pending delalloc, used by stat to calc the |
102 | * real block usage of the file | |
103 | */ | |
9069218d | 104 | u64 delalloc_bytes; |
d352ac68 | 105 | |
6a63209f JB |
106 | /* total number of bytes that may be used for this inode for |
107 | * delalloc | |
108 | */ | |
109 | u64 reserved_bytes; | |
110 | ||
d352ac68 CM |
111 | /* |
112 | * the size of the file stored in the metadata on disk. data=ordered | |
113 | * means the in-memory i_size might be larger than the size on disk | |
114 | * because not all the blocks are written yet. | |
115 | */ | |
dbe674a9 | 116 | u64 disk_i_size; |
d352ac68 CM |
117 | |
118 | /* flags field from the on disk inode */ | |
b98b6767 | 119 | u32 flags; |
aec7477b JB |
120 | |
121 | /* | |
122 | * if this is a directory then index_cnt is the counter for the index | |
123 | * number for new files that are created | |
124 | */ | |
125 | u64 index_cnt; | |
d352ac68 | 126 | |
12fcfd22 CM |
127 | /* the fsync log has some corner cases that mean we have to check |
128 | * directories to see if any unlinks have been done before | |
129 | * the directory was logged. See tree-log.c for all the | |
130 | * details | |
131 | */ | |
132 | u64 last_unlink_trans; | |
133 | ||
9ed74f2d | 134 | /* |
32c00aff JB |
135 | * Counters to keep track of the number of extent item's we may use due |
136 | * to delalloc and such. outstanding_extents is the number of extent | |
137 | * items we think we'll end up using, and reserved_extents is the number | |
138 | * of extent items we've reserved metadata for. | |
9ed74f2d | 139 | */ |
9e0baf60 JB |
140 | unsigned outstanding_extents; |
141 | unsigned 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; |
4cb5300b | 156 | unsigned in_defrag:1; |
5a3f23d5 | 157 | |
1e701a32 CM |
158 | /* |
159 | * always compress this one file | |
160 | */ | |
261507a0 | 161 | unsigned force_compress:4; |
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 | ||
179 | if (ino <= BTRFS_FIRST_FREE_OBJECTID) | |
180 | ino = inode->i_ino; | |
181 | return ino; | |
182 | } | |
183 | ||
dbe674a9 CM |
184 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
185 | { | |
c2167754 | 186 | i_size_write(inode, size); |
dbe674a9 CM |
187 | BTRFS_I(inode)->disk_i_size = size; |
188 | } | |
189 | ||
2cf8572d CM |
190 | static inline bool btrfs_is_free_space_inode(struct btrfs_root *root, |
191 | struct inode *inode) | |
192 | { | |
193 | if (root == root->fs_info->tree_root || | |
194 | BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) | |
195 | return true; | |
196 | return false; | |
197 | } | |
198 | ||
2c90e5d6 | 199 | #endif |