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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 |
72ac3c0d | 40 | |
f1ace244 | 41 | /* in memory btrfs inode */ |
2c90e5d6 | 42 | struct btrfs_inode { |
d352ac68 | 43 | /* which subvolume this inode belongs to */ |
d6e4a428 | 44 | struct btrfs_root *root; |
d352ac68 | 45 | |
d352ac68 CM |
46 | /* key used to find this inode on disk. This is used by the code |
47 | * to read in roots of subvolumes | |
48 | */ | |
d6e4a428 | 49 | struct btrfs_key location; |
d352ac68 | 50 | |
9e0baf60 JB |
51 | /* Lock for counters */ |
52 | spinlock_t lock; | |
53 | ||
d352ac68 | 54 | /* the extent_tree has caches of all the extent mappings to disk */ |
a52d9a80 | 55 | struct extent_map_tree extent_tree; |
d352ac68 CM |
56 | |
57 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 58 | struct extent_io_tree io_tree; |
d352ac68 CM |
59 | |
60 | /* special utility tree used to record which mirrors have already been | |
61 | * tried when checksums fail for a given block | |
62 | */ | |
7e38326f | 63 | struct extent_io_tree io_failure_tree; |
d352ac68 | 64 | |
d352ac68 | 65 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 66 | struct mutex log_mutex; |
d352ac68 | 67 | |
f248679e JB |
68 | /* held while doing delalloc reservations */ |
69 | struct mutex delalloc_mutex; | |
70 | ||
d352ac68 | 71 | /* used to order data wrt metadata */ |
e6dcd2dc | 72 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 73 | |
d352ac68 CM |
74 | /* list of all the delalloc inodes in the FS. There are times we need |
75 | * to write all the delalloc pages to disk, and this list is used | |
76 | * to walk them all. | |
77 | */ | |
ea8c2819 CM |
78 | struct list_head delalloc_inodes; |
79 | ||
5a3f23d5 CM |
80 | /* |
81 | * list for tracking inodes that must be sent to disk before a | |
82 | * rename or truncate commit | |
83 | */ | |
84 | struct list_head ordered_operations; | |
85 | ||
5d4f98a2 YZ |
86 | /* node for the red-black tree that links inodes in subvolume root */ |
87 | struct rb_node rb_node; | |
88 | ||
6a63209f JB |
89 | /* the space_info for where this inode's data allocations are done */ |
90 | struct btrfs_space_info *space_info; | |
91 | ||
72ac3c0d JB |
92 | unsigned long runtime_flags; |
93 | ||
d352ac68 CM |
94 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
95 | * enough field for this. | |
96 | */ | |
e02119d5 CM |
97 | u64 generation; |
98 | ||
15ee9bc7 JB |
99 | /* |
100 | * transid of the trans_handle that last modified this inode | |
101 | */ | |
102 | u64 last_trans; | |
257c62e1 CM |
103 | |
104 | /* | |
105 | * log transid when this inode was last modified | |
106 | */ | |
107 | u64 last_sub_trans; | |
108 | ||
e02119d5 CM |
109 | /* |
110 | * transid that last logged this inode | |
111 | */ | |
112 | u64 logged_trans; | |
49eb7e46 | 113 | |
d352ac68 CM |
114 | /* total number of bytes pending delalloc, used by stat to calc the |
115 | * real block usage of the file | |
116 | */ | |
9069218d | 117 | u64 delalloc_bytes; |
d352ac68 CM |
118 | |
119 | /* | |
120 | * the size of the file stored in the metadata on disk. data=ordered | |
121 | * means the in-memory i_size might be larger than the size on disk | |
122 | * because not all the blocks are written yet. | |
123 | */ | |
dbe674a9 | 124 | u64 disk_i_size; |
d352ac68 | 125 | |
aec7477b JB |
126 | /* |
127 | * if this is a directory then index_cnt is the counter for the index | |
128 | * number for new files that are created | |
129 | */ | |
130 | u64 index_cnt; | |
d352ac68 | 131 | |
12fcfd22 CM |
132 | /* the fsync log has some corner cases that mean we have to check |
133 | * directories to see if any unlinks have been done before | |
134 | * the directory was logged. See tree-log.c for all the | |
135 | * details | |
136 | */ | |
137 | u64 last_unlink_trans; | |
138 | ||
7709cde3 JB |
139 | /* |
140 | * Number of bytes outstanding that are going to need csums. This is | |
141 | * used in ENOSPC accounting. | |
142 | */ | |
143 | u64 csum_bytes; | |
144 | ||
f1bdcc0a JB |
145 | /* flags field from the on disk inode */ |
146 | u32 flags; | |
147 | ||
9ed74f2d | 148 | /* |
32c00aff JB |
149 | * Counters to keep track of the number of extent item's we may use due |
150 | * to delalloc and such. outstanding_extents is the number of extent | |
151 | * items we think we'll end up using, and reserved_extents is the number | |
152 | * of extent items we've reserved metadata for. | |
9ed74f2d | 153 | */ |
9e0baf60 JB |
154 | unsigned outstanding_extents; |
155 | unsigned reserved_extents; | |
9ed74f2d | 156 | |
1e701a32 CM |
157 | /* |
158 | * always compress this one file | |
159 | */ | |
72ac3c0d | 160 | unsigned force_compress; |
1e701a32 | 161 | |
16cdcec7 MX |
162 | struct btrfs_delayed_node *delayed_node; |
163 | ||
d352ac68 | 164 | struct inode vfs_inode; |
2c90e5d6 | 165 | }; |
dbe674a9 | 166 | |
16cdcec7 MX |
167 | extern unsigned char btrfs_filetype_table[]; |
168 | ||
2c90e5d6 CM |
169 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
170 | { | |
171 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
172 | } | |
173 | ||
33345d01 LZ |
174 | static inline u64 btrfs_ino(struct inode *inode) |
175 | { | |
176 | u64 ino = BTRFS_I(inode)->location.objectid; | |
177 | ||
14c7cca7 LB |
178 | /* |
179 | * !ino: btree_inode | |
180 | * type == BTRFS_ROOT_ITEM_KEY: subvol dir | |
181 | */ | |
182 | if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) | |
33345d01 LZ |
183 | ino = inode->i_ino; |
184 | return ino; | |
185 | } | |
186 | ||
dbe674a9 CM |
187 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
188 | { | |
c2167754 | 189 | i_size_write(inode, size); |
dbe674a9 CM |
190 | BTRFS_I(inode)->disk_i_size = size; |
191 | } | |
192 | ||
2cf8572d CM |
193 | static inline bool btrfs_is_free_space_inode(struct btrfs_root *root, |
194 | struct inode *inode) | |
195 | { | |
196 | if (root == root->fs_info->tree_root || | |
197 | BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) | |
198 | return true; | |
199 | return false; | |
200 | } | |
201 | ||
22ee6985 JB |
202 | static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) |
203 | { | |
204 | struct btrfs_root *root = BTRFS_I(inode)->root; | |
205 | int ret = 0; | |
206 | ||
207 | mutex_lock(&root->log_mutex); | |
208 | if (BTRFS_I(inode)->logged_trans == generation && | |
209 | BTRFS_I(inode)->last_sub_trans <= root->last_log_commit) | |
210 | ret = 1; | |
211 | mutex_unlock(&root->log_mutex); | |
212 | return ret; | |
213 | } | |
214 | ||
2c90e5d6 | 215 | #endif |