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6#ifndef BTRFS_ORDERED_DATA_H
7#define BTRFS_ORDERED_DATA_H
8
9
10struct btrfs_ordered_inode_tree {
11 spinlock_t lock;
12 struct rb_root tree;
13 struct rb_node *last;
14};
15
16struct btrfs_ordered_sum {
17
18 u64 bytenr;
19
20
21
22
23 int len;
24 struct list_head list;
25
26 u32 sums[];
27};
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37
38
39
40enum {
41
42 BTRFS_ORDERED_IO_DONE,
43
44 BTRFS_ORDERED_COMPLETE,
45
46 BTRFS_ORDERED_NOCOW,
47
48 BTRFS_ORDERED_COMPRESSED,
49
50 BTRFS_ORDERED_PREALLOC,
51
52 BTRFS_ORDERED_DIRECT,
53
54 BTRFS_ORDERED_IOERR,
55
56
57
58
59 BTRFS_ORDERED_UPDATED_ISIZE,
60
61 BTRFS_ORDERED_TRUNCATED,
62
63 BTRFS_ORDERED_REGULAR,
64};
65
66struct btrfs_ordered_extent {
67
68 u64 file_offset;
69
70
71 u64 start;
72
73
74 u64 len;
75
76
77 u64 disk_len;
78
79
80 u64 bytes_left;
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87 u64 outstanding_isize;
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91
92
93 u64 truncated_len;
94
95
96 unsigned long flags;
97
98
99 int compress_type;
100
101
102 refcount_t refs;
103
104
105 struct inode *inode;
106
107
108 struct list_head list;
109
110
111 struct list_head log_list;
112
113
114 struct list_head trans_list;
115
116
117 wait_queue_head_t wait;
118
119
120 struct rb_node rb_node;
121
122
123 struct list_head root_extent_list;
124
125 struct btrfs_work work;
126
127 struct completion completion;
128 struct btrfs_work flush_work;
129 struct list_head work_list;
130};
131
132
133
134
135
136static inline int btrfs_ordered_sum_size(struct btrfs_fs_info *fs_info,
137 unsigned long bytes)
138{
139 int num_sectors = (int)DIV_ROUND_UP(bytes, fs_info->sectorsize);
140 int csum_size = btrfs_super_csum_size(fs_info->super_copy);
141
142 return sizeof(struct btrfs_ordered_sum) + num_sectors * csum_size;
143}
144
145static inline void
146btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
147{
148 spin_lock_init(&t->lock);
149 t->tree = RB_ROOT;
150 t->last = NULL;
151}
152
153void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
154void btrfs_remove_ordered_extent(struct inode *inode,
155 struct btrfs_ordered_extent *entry);
156int btrfs_dec_test_ordered_pending(struct inode *inode,
157 struct btrfs_ordered_extent **cached,
158 u64 file_offset, u64 io_size, int uptodate);
159int btrfs_dec_test_first_ordered_pending(struct inode *inode,
160 struct btrfs_ordered_extent **cached,
161 u64 *file_offset, u64 io_size,
162 int uptodate);
163int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
164 u64 start, u64 len, u64 disk_len, int type);
165int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
166 u64 start, u64 len, u64 disk_len, int type);
167int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
168 u64 start, u64 len, u64 disk_len,
169 int type, int compress_type);
170void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
171 struct btrfs_ordered_sum *sum);
172struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
173 u64 file_offset);
174void btrfs_start_ordered_extent(struct inode *inode,
175 struct btrfs_ordered_extent *entry, int wait);
176int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
177struct btrfs_ordered_extent *
178btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
179struct btrfs_ordered_extent *btrfs_lookup_ordered_range(
180 struct btrfs_inode *inode,
181 u64 file_offset,
182 u64 len);
183int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
184 struct btrfs_ordered_extent *ordered);
185int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
186 u32 *sum, int len);
187u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr,
188 const u64 range_start, const u64 range_len);
189u64 btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
190 const u64 range_start, const u64 range_len);
191int __init ordered_data_init(void);
192void __cold ordered_data_exit(void);
193
194#endif
195