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19#ifndef __BTRFS_I__
20#define __BTRFS_I__
21
22#include <linux/hash.h>
23#include "extent_map.h"
24#include "extent_io.h"
25#include "ordered-data.h"
26#include "delayed-inode.h"
27
28
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30
31
32
33
34
35#define BTRFS_INODE_ORDERED_DATA_CLOSE 0
36#define BTRFS_INODE_ORPHAN_META_RESERVED 1
37#define BTRFS_INODE_DUMMY 2
38#define BTRFS_INODE_IN_DEFRAG 3
39#define BTRFS_INODE_DELALLOC_META_RESERVED 4
40#define BTRFS_INODE_HAS_ORPHAN_ITEM 5
41#define BTRFS_INODE_HAS_ASYNC_EXTENT 6
42#define BTRFS_INODE_NEEDS_FULL_SYNC 7
43#define BTRFS_INODE_COPY_EVERYTHING 8
44#define BTRFS_INODE_IN_DELALLOC_LIST 9
45#define BTRFS_INODE_READDIO_NEED_LOCK 10
46
47
48struct btrfs_inode {
49
50 struct btrfs_root *root;
51
52
53
54
55 struct btrfs_key location;
56
57
58 spinlock_t lock;
59
60
61 struct extent_map_tree extent_tree;
62
63
64 struct extent_io_tree io_tree;
65
66
67
68
69 struct extent_io_tree io_failure_tree;
70
71
72 struct mutex log_mutex;
73
74
75 struct mutex delalloc_mutex;
76
77
78 struct btrfs_ordered_inode_tree ordered_tree;
79
80
81
82
83
84 struct list_head delalloc_inodes;
85
86
87
88
89
90 struct list_head ordered_operations;
91
92
93 struct rb_node rb_node;
94
95 unsigned long runtime_flags;
96
97
98 atomic_t sync_writers;
99
100
101
102
103 u64 generation;
104
105
106
107
108 u64 last_trans;
109
110
111
112
113 u64 last_sub_trans;
114
115
116
117
118 u64 logged_trans;
119
120
121
122
123 u64 delalloc_bytes;
124
125
126
127
128
129
130 u64 disk_i_size;
131
132
133
134
135
136 u64 index_cnt;
137
138
139
140
141
142
143 u64 last_unlink_trans;
144
145
146
147
148
149 u64 csum_bytes;
150
151
152 u32 flags;
153
154
155 unsigned long last_log_commit;
156
157
158
159
160
161
162
163 unsigned outstanding_extents;
164 unsigned reserved_extents;
165
166
167
168
169 unsigned force_compress;
170
171 struct btrfs_delayed_node *delayed_node;
172
173 struct inode vfs_inode;
174};
175
176extern unsigned char btrfs_filetype_table[];
177
178static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
179{
180 return container_of(inode, struct btrfs_inode, vfs_inode);
181}
182
183static inline unsigned long btrfs_inode_hash(u64 objectid,
184 const struct btrfs_root *root)
185{
186 u64 h = objectid ^ (root->objectid * GOLDEN_RATIO_PRIME);
187
188#if BITS_PER_LONG == 32
189 h = (h >> 32) ^ (h & 0xffffffff);
190#endif
191
192 return (unsigned long)h;
193}
194
195static inline void btrfs_insert_inode_hash(struct inode *inode)
196{
197 unsigned long h = btrfs_inode_hash(inode->i_ino, BTRFS_I(inode)->root);
198
199 __insert_inode_hash(inode, h);
200}
201
202static inline u64 btrfs_ino(struct inode *inode)
203{
204 u64 ino = BTRFS_I(inode)->location.objectid;
205
206
207
208
209
210 if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY)
211 ino = inode->i_ino;
212 return ino;
213}
214
215static inline void btrfs_i_size_write(struct inode *inode, u64 size)
216{
217 i_size_write(inode, size);
218 BTRFS_I(inode)->disk_i_size = size;
219}
220
221static inline bool btrfs_is_free_space_inode(struct inode *inode)
222{
223 struct btrfs_root *root = BTRFS_I(inode)->root;
224
225 if (root == root->fs_info->tree_root &&
226 btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID)
227 return true;
228 if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID)
229 return true;
230 return false;
231}
232
233static inline int btrfs_inode_in_log(struct inode *inode, u64 generation)
234{
235 if (BTRFS_I(inode)->logged_trans == generation &&
236 BTRFS_I(inode)->last_sub_trans <=
237 BTRFS_I(inode)->last_log_commit &&
238 BTRFS_I(inode)->last_sub_trans <=
239 BTRFS_I(inode)->root->last_log_commit)
240 return 1;
241 return 0;
242}
243
244struct btrfs_dio_private {
245 struct inode *inode;
246 u64 logical_offset;
247 u64 disk_bytenr;
248 u64 bytes;
249 void *private;
250
251
252 atomic_t pending_bios;
253
254
255 int errors;
256
257
258 struct bio *orig_bio;
259
260
261 struct bio *dio_bio;
262 u8 csum[0];
263};
264
265
266
267
268
269
270static inline void btrfs_inode_block_unlocked_dio(struct inode *inode)
271{
272 set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags);
273 smp_mb();
274}
275
276static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode)
277{
278 smp_mb__before_clear_bit();
279 clear_bit(BTRFS_INODE_READDIO_NEED_LOCK,
280 &BTRFS_I(inode)->runtime_flags);
281}
282
283#endif
284