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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
fa9c0d79 CM |
2 | /* |
3 | * Copyright (C) 2009 Oracle. All rights reserved. | |
fa9c0d79 CM |
4 | */ |
5 | ||
9888c340 DS |
6 | #ifndef BTRFS_FREE_SPACE_CACHE_H |
7 | #define BTRFS_FREE_SPACE_CACHE_H | |
fa9c0d79 | 8 | |
a7ccb255 DZ |
9 | /* |
10 | * This is the trim state of an extent or bitmap. | |
da080fe1 DZ |
11 | * |
12 | * BTRFS_TRIM_STATE_TRIMMING is special and used to maintain the state of a | |
13 | * bitmap as we may need several trims to fully trim a single bitmap entry. | |
14 | * This is reset should any free space other than trimmed space be added to the | |
15 | * bitmap. | |
a7ccb255 DZ |
16 | */ |
17 | enum btrfs_trim_state { | |
18 | BTRFS_TRIM_STATE_UNTRIMMED, | |
19 | BTRFS_TRIM_STATE_TRIMMED, | |
da080fe1 | 20 | BTRFS_TRIM_STATE_TRIMMING, |
a7ccb255 DZ |
21 | }; |
22 | ||
96303081 JB |
23 | struct btrfs_free_space { |
24 | struct rb_node offset_index; | |
25 | u64 offset; | |
26 | u64 bytes; | |
cef40483 | 27 | u64 max_extent_size; |
96303081 JB |
28 | unsigned long *bitmap; |
29 | struct list_head list; | |
a7ccb255 | 30 | enum btrfs_trim_state trim_state; |
dfb79ddb | 31 | s32 bitmap_extents; |
96303081 JB |
32 | }; |
33 | ||
a7ccb255 DZ |
34 | static inline bool btrfs_free_space_trimmed(struct btrfs_free_space *info) |
35 | { | |
36 | return (info->trim_state == BTRFS_TRIM_STATE_TRIMMED); | |
37 | } | |
38 | ||
da080fe1 DZ |
39 | static inline bool btrfs_free_space_trimming_bitmap( |
40 | struct btrfs_free_space *info) | |
41 | { | |
42 | return (info->trim_state == BTRFS_TRIM_STATE_TRIMMING); | |
43 | } | |
44 | ||
34d52cb6 LZ |
45 | struct btrfs_free_space_ctl { |
46 | spinlock_t tree_lock; | |
47 | struct rb_root free_space_offset; | |
48 | u64 free_space; | |
49 | int extents_thresh; | |
50 | int free_extents; | |
51 | int total_bitmaps; | |
52 | int unit; | |
53 | u64 start; | |
dfb79ddb | 54 | s32 discardable_extents[BTRFS_STAT_NR_ENTRIES]; |
5dc7c10b | 55 | s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES]; |
20e5506b | 56 | const struct btrfs_free_space_op *op; |
34d52cb6 | 57 | void *private; |
55507ce3 FM |
58 | struct mutex cache_writeout_mutex; |
59 | struct list_head trimming_ranges; | |
34d52cb6 LZ |
60 | }; |
61 | ||
62 | struct btrfs_free_space_op { | |
63 | void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl); | |
64 | bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl, | |
65 | struct btrfs_free_space *info); | |
66 | }; | |
67 | ||
67b61aef DS |
68 | struct btrfs_io_ctl { |
69 | void *cur, *orig; | |
70 | struct page *page; | |
71 | struct page **pages; | |
72 | struct btrfs_fs_info *fs_info; | |
73 | struct inode *inode; | |
74 | unsigned long size; | |
75 | int index; | |
76 | int num_pages; | |
77 | int entries; | |
78 | int bitmaps; | |
79 | unsigned check_crcs:1; | |
80 | }; | |
c9dc4c65 | 81 | |
32da5386 | 82 | struct inode *lookup_free_space_inode(struct btrfs_block_group *block_group, |
7949f339 | 83 | struct btrfs_path *path); |
4ca75f1b | 84 | int create_free_space_inode(struct btrfs_trans_handle *trans, |
32da5386 | 85 | struct btrfs_block_group *block_group, |
0af3d00b | 86 | struct btrfs_path *path); |
0cb59c99 | 87 | |
2ff7e61e | 88 | int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, |
7b61cd92 | 89 | struct btrfs_block_rsv *rsv); |
77ab86bf | 90 | int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans, |
32da5386 | 91 | struct btrfs_block_group *block_group, |
0af3d00b | 92 | struct inode *inode); |
32da5386 | 93 | int load_free_space_cache(struct btrfs_block_group *block_group); |
afdb5718 | 94 | int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, |
32da5386 | 95 | struct btrfs_block_group *block_group, |
afdb5718 | 96 | struct btrfs_path *path); |
fe041534 | 97 | int btrfs_write_out_cache(struct btrfs_trans_handle *trans, |
32da5386 | 98 | struct btrfs_block_group *block_group, |
0cb59c99 | 99 | struct btrfs_path *path); |
82d5902d LZ |
100 | struct inode *lookup_free_ino_inode(struct btrfs_root *root, |
101 | struct btrfs_path *path); | |
102 | int create_free_ino_inode(struct btrfs_root *root, | |
103 | struct btrfs_trans_handle *trans, | |
104 | struct btrfs_path *path); | |
105 | int load_free_ino_cache(struct btrfs_fs_info *fs_info, | |
106 | struct btrfs_root *root); | |
107 | int btrfs_write_out_ino_cache(struct btrfs_root *root, | |
108 | struct btrfs_trans_handle *trans, | |
53645a91 FDBM |
109 | struct btrfs_path *path, |
110 | struct inode *inode); | |
82d5902d | 111 | |
32da5386 | 112 | void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group); |
ab8d0fc4 JM |
113 | int __btrfs_add_free_space(struct btrfs_fs_info *fs_info, |
114 | struct btrfs_free_space_ctl *ctl, | |
a7ccb255 DZ |
115 | u64 bytenr, u64 size, |
116 | enum btrfs_trim_state trim_state); | |
32da5386 | 117 | int btrfs_add_free_space(struct btrfs_block_group *block_group, |
478b4d9f | 118 | u64 bytenr, u64 size); |
b0643e59 DZ |
119 | int btrfs_add_free_space_async_trimmed(struct btrfs_block_group *block_group, |
120 | u64 bytenr, u64 size); | |
32da5386 | 121 | int btrfs_remove_free_space(struct btrfs_block_group *block_group, |
fa9c0d79 | 122 | u64 bytenr, u64 size); |
581bb050 | 123 | void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl); |
32da5386 | 124 | void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group); |
6e80d4f8 | 125 | bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group); |
32da5386 | 126 | u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group, |
a4820398 MX |
127 | u64 offset, u64 bytes, u64 empty_size, |
128 | u64 *max_extent_size); | |
581bb050 | 129 | u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root); |
32da5386 | 130 | void btrfs_dump_free_space(struct btrfs_block_group *block_group, |
fa9c0d79 | 131 | u64 bytes); |
32da5386 | 132 | int btrfs_find_space_cluster(struct btrfs_block_group *block_group, |
fa9c0d79 CM |
133 | struct btrfs_free_cluster *cluster, |
134 | u64 offset, u64 bytes, u64 empty_size); | |
135 | void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster); | |
32da5386 | 136 | u64 btrfs_alloc_from_cluster(struct btrfs_block_group *block_group, |
fa9c0d79 | 137 | struct btrfs_free_cluster *cluster, u64 bytes, |
a4820398 | 138 | u64 min_start, u64 *max_extent_size); |
69b0e093 | 139 | void btrfs_return_cluster_to_free_space( |
32da5386 | 140 | struct btrfs_block_group *block_group, |
fa9c0d79 | 141 | struct btrfs_free_cluster *cluster); |
32da5386 | 142 | int btrfs_trim_block_group(struct btrfs_block_group *block_group, |
f7039b1d | 143 | u64 *trimmed, u64 start, u64 end, u64 minlen); |
2bee7eb8 DZ |
144 | int btrfs_trim_block_group_extents(struct btrfs_block_group *block_group, |
145 | u64 *trimmed, u64 start, u64 end, u64 minlen, | |
146 | bool async); | |
147 | int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group, | |
148 | u64 *trimmed, u64 start, u64 end, u64 minlen, | |
7fe6d45e | 149 | u64 maxlen, bool async); |
74255aa0 | 150 | |
01327610 | 151 | /* Support functions for running our sanity tests */ |
dc11dd5d | 152 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
32da5386 | 153 | int test_add_free_space_entry(struct btrfs_block_group *cache, |
dc11dd5d | 154 | u64 offset, u64 bytes, bool bitmap); |
32da5386 | 155 | int test_check_exists(struct btrfs_block_group *cache, u64 offset, u64 bytes); |
dc11dd5d | 156 | #endif |
74255aa0 | 157 | |
fa9c0d79 | 158 | #endif |