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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
dc17ff8f CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
dc17ff8f CM |
4 | */ |
5 | ||
9888c340 DS |
6 | #ifndef BTRFS_ORDERED_DATA_H |
7 | #define BTRFS_ORDERED_DATA_H | |
dc17ff8f | 8 | |
eb84ae03 | 9 | /* one of these per inode */ |
dc17ff8f | 10 | struct btrfs_ordered_inode_tree { |
49958fd7 | 11 | spinlock_t lock; |
dc17ff8f | 12 | struct rb_root tree; |
e6dcd2dc | 13 | struct rb_node *last; |
dc17ff8f CM |
14 | }; |
15 | ||
e6dcd2dc | 16 | struct btrfs_ordered_sum { |
d20f7043 CM |
17 | /* bytenr is the start of this extent on disk */ |
18 | u64 bytenr; | |
19 | ||
3edf7d33 CM |
20 | /* |
21 | * this is the length in bytes covered by the sums array below. | |
3edf7d33 | 22 | */ |
f51a4a18 | 23 | int len; |
e6dcd2dc | 24 | struct list_head list; |
f51a4a18 | 25 | /* last field is a variable length array of csums */ |
1e25a2e3 | 26 | u8 sums[]; |
e6dcd2dc CM |
27 | }; |
28 | ||
eb84ae03 CM |
29 | /* |
30 | * bits for the flags field: | |
31 | * | |
32 | * BTRFS_ORDERED_IO_DONE is set when all of the blocks are written. | |
33 | * It is used to make sure metadata is inserted into the tree only once | |
34 | * per extent. | |
35 | * | |
36 | * BTRFS_ORDERED_COMPLETE is set when the extent is removed from the | |
37 | * rbtree, just before waking any waiters. It is used to indicate the | |
38 | * IO is done and any metadata is inserted into the tree. | |
39 | */ | |
5b840301 DS |
40 | enum { |
41 | /* set when all the pages are written */ | |
42 | BTRFS_ORDERED_IO_DONE, | |
43 | /* set when removed from the tree */ | |
44 | BTRFS_ORDERED_COMPLETE, | |
45 | /* set when we want to write in place */ | |
46 | BTRFS_ORDERED_NOCOW, | |
47 | /* writing a zlib compressed extent */ | |
48 | BTRFS_ORDERED_COMPRESSED, | |
49 | /* set when writing to preallocated extent */ | |
50 | BTRFS_ORDERED_PREALLOC, | |
51 | /* set when we're doing DIO with this extent */ | |
52 | BTRFS_ORDERED_DIRECT, | |
53 | /* We had an io error when writing this out */ | |
54 | BTRFS_ORDERED_IOERR, | |
5b840301 DS |
55 | /* Set when we have to truncate an extent */ |
56 | BTRFS_ORDERED_TRUNCATED, | |
57 | /* Regular IO for COW */ | |
58 | BTRFS_ORDERED_REGULAR, | |
59 | }; | |
1af4a0aa | 60 | |
e6dcd2dc | 61 | struct btrfs_ordered_extent { |
eb84ae03 | 62 | /* logical offset in the file */ |
e6dcd2dc | 63 | u64 file_offset; |
eb84ae03 | 64 | |
bffe633e OS |
65 | /* |
66 | * These fields directly correspond to the same fields in | |
67 | * btrfs_file_extent_item. | |
68 | */ | |
69 | u64 disk_bytenr; | |
70 | u64 num_bytes; | |
71 | u64 disk_num_bytes; | |
c8b97818 | 72 | |
8b62b72b CM |
73 | /* number of bytes that still need writing */ |
74 | u64 bytes_left; | |
75 | ||
b9a8cc5b MX |
76 | /* |
77 | * the end of the ordered extent which is behind it but | |
78 | * didn't update disk_i_size. Please see the comment of | |
79 | * btrfs_ordered_update_i_size(); | |
80 | */ | |
81 | u64 outstanding_isize; | |
82 | ||
77cef2ec JB |
83 | /* |
84 | * If we get truncated we need to adjust the file extent we enter for | |
85 | * this ordered extent so that we do not expose stale data. | |
86 | */ | |
87 | u64 truncated_len; | |
88 | ||
eb84ae03 | 89 | /* flags (described above) */ |
e6dcd2dc | 90 | unsigned long flags; |
eb84ae03 | 91 | |
261507a0 LZ |
92 | /* compression algorithm */ |
93 | int compress_type; | |
94 | ||
7dbeaad0 QW |
95 | /* Qgroup reserved space */ |
96 | int qgroup_rsv; | |
97 | ||
eb84ae03 | 98 | /* reference count */ |
e76edab7 | 99 | refcount_t refs; |
eb84ae03 | 100 | |
3eaa2885 CM |
101 | /* the inode we belong to */ |
102 | struct inode *inode; | |
103 | ||
eb84ae03 | 104 | /* list of checksums for insertion when the extent io is done */ |
e6dcd2dc | 105 | struct list_head list; |
eb84ae03 CM |
106 | |
107 | /* used to wait for the BTRFS_ORDERED_COMPLETE bit */ | |
e6dcd2dc | 108 | wait_queue_head_t wait; |
eb84ae03 CM |
109 | |
110 | /* our friendly rbtree entry */ | |
e6dcd2dc | 111 | struct rb_node rb_node; |
3eaa2885 CM |
112 | |
113 | /* a per root list of all the pending ordered extents */ | |
114 | struct list_head root_extent_list; | |
5fd02043 | 115 | |
d458b054 | 116 | struct btrfs_work work; |
e6dcd2dc | 117 | |
9afab882 | 118 | struct completion completion; |
d458b054 | 119 | struct btrfs_work flush_work; |
9afab882 MX |
120 | struct list_head work_list; |
121 | }; | |
e6dcd2dc | 122 | |
eb84ae03 CM |
123 | /* |
124 | * calculates the total size you need to allocate for an ordered sum | |
125 | * structure spanning 'bytes' in the file | |
126 | */ | |
da17066c | 127 | static inline int btrfs_ordered_sum_size(struct btrfs_fs_info *fs_info, |
9ba4611a | 128 | unsigned long bytes) |
e6dcd2dc | 129 | { |
da17066c | 130 | int num_sectors = (int)DIV_ROUND_UP(bytes, fs_info->sectorsize); |
af89e0dc NB |
131 | int csum_size = btrfs_super_csum_size(fs_info->super_copy); |
132 | ||
133 | return sizeof(struct btrfs_ordered_sum) + num_sectors * csum_size; | |
e6dcd2dc CM |
134 | } |
135 | ||
dc17ff8f CM |
136 | static inline void |
137 | btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t) | |
138 | { | |
49958fd7 | 139 | spin_lock_init(&t->lock); |
6bef4d31 | 140 | t->tree = RB_ROOT; |
e6dcd2dc | 141 | t->last = NULL; |
dc17ff8f CM |
142 | } |
143 | ||
143bede5 JM |
144 | void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry); |
145 | void btrfs_remove_ordered_extent(struct inode *inode, | |
e6dcd2dc CM |
146 | struct btrfs_ordered_extent *entry); |
147 | int btrfs_dec_test_ordered_pending(struct inode *inode, | |
5a1a3df1 | 148 | struct btrfs_ordered_extent **cached, |
5fd02043 | 149 | u64 file_offset, u64 io_size, int uptodate); |
7095821e | 150 | int btrfs_dec_test_first_ordered_pending(struct btrfs_inode *inode, |
163cf09c | 151 | struct btrfs_ordered_extent **cached, |
5fd02043 JB |
152 | u64 *file_offset, u64 io_size, |
153 | int uptodate); | |
e7fbf604 | 154 | int btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset, |
bffe633e OS |
155 | u64 disk_bytenr, u64 num_bytes, u64 disk_num_bytes, |
156 | int type); | |
4b46fce2 | 157 | int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, |
bffe633e OS |
158 | u64 disk_bytenr, u64 num_bytes, |
159 | u64 disk_num_bytes, int type); | |
4cc61209 | 160 | int btrfs_add_ordered_extent_compress(struct btrfs_inode *inode, u64 file_offset, |
bffe633e OS |
161 | u64 disk_bytenr, u64 num_bytes, |
162 | u64 disk_num_bytes, int type, | |
163 | int compress_type); | |
f9756261 | 164 | void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry, |
143bede5 | 165 | struct btrfs_ordered_sum *sum); |
c3504372 | 166 | struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *inode, |
e6dcd2dc | 167 | u64 file_offset); |
eb84ae03 CM |
168 | void btrfs_start_ordered_extent(struct inode *inode, |
169 | struct btrfs_ordered_extent *entry, int wait); | |
0ef8b726 | 170 | int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len); |
e6dcd2dc CM |
171 | struct btrfs_ordered_extent * |
172 | btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset); | |
a776c6fa NB |
173 | struct btrfs_ordered_extent *btrfs_lookup_ordered_range( |
174 | struct btrfs_inode *inode, | |
175 | u64 file_offset, | |
176 | u64 len); | |
e4100d98 | 177 | int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, |
1e25a2e3 | 178 | u8 *sum, int len); |
6374e57a | 179 | u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr, |
578def7c | 180 | const u64 range_start, const u64 range_len); |
042528f8 | 181 | void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr, |
578def7c | 182 | const u64 range_start, const u64 range_len); |
b272ae22 | 183 | void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start, |
ffa87214 NB |
184 | u64 end, |
185 | struct extent_state **cached_state); | |
6352b91d | 186 | int __init ordered_data_init(void); |
e67c718b | 187 | void __cold ordered_data_exit(void); |
9888c340 | 188 | |
dc17ff8f | 189 | #endif |