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d12ffdd1 JB |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | ||
3 | #ifndef BTRFS_BLOCK_RSV_H | |
4 | #define BTRFS_BLOCK_RSV_H | |
5 | ||
67f9c220 | 6 | struct btrfs_trans_handle; |
3683fbbc | 7 | struct btrfs_root; |
d12ffdd1 JB |
8 | enum btrfs_reserve_flush_enum; |
9 | ||
10 | /* | |
11 | * Types of block reserves | |
12 | */ | |
8bfc9b2c | 13 | enum btrfs_rsv_type { |
d12ffdd1 JB |
14 | BTRFS_BLOCK_RSV_GLOBAL, |
15 | BTRFS_BLOCK_RSV_DELALLOC, | |
16 | BTRFS_BLOCK_RSV_TRANS, | |
17 | BTRFS_BLOCK_RSV_CHUNK, | |
18 | BTRFS_BLOCK_RSV_DELOPS, | |
19 | BTRFS_BLOCK_RSV_DELREFS, | |
20 | BTRFS_BLOCK_RSV_EMPTY, | |
21 | BTRFS_BLOCK_RSV_TEMP, | |
22 | }; | |
23 | ||
24 | struct btrfs_block_rsv { | |
25 | u64 size; | |
26 | u64 reserved; | |
27 | struct btrfs_space_info *space_info; | |
28 | spinlock_t lock; | |
c70c2c5b | 29 | bool full; |
710d5921 | 30 | bool failfast; |
8bfc9b2c DS |
31 | /* Block reserve type, one of BTRFS_BLOCK_RSV_* */ |
32 | enum btrfs_rsv_type type:8; | |
d12ffdd1 JB |
33 | |
34 | /* | |
35 | * Qgroup equivalent for @size @reserved | |
36 | * | |
37 | * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care | |
38 | * about things like csum size nor how many tree blocks it will need to | |
39 | * reserve. | |
40 | * | |
41 | * Qgroup cares more about net change of the extent usage. | |
42 | * | |
43 | * So for one newly inserted file extent, in worst case it will cause | |
44 | * leaf split and level increase, nodesize for each file extent is | |
45 | * already too much. | |
46 | * | |
47 | * In short, qgroup_size/reserved is the upper limit of possible needed | |
48 | * qgroup metadata reservation. | |
49 | */ | |
50 | u64 qgroup_rsv_size; | |
51 | u64 qgroup_rsv_reserved; | |
52 | }; | |
53 | ||
8bfc9b2c | 54 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, enum btrfs_rsv_type type); |
2e608bd1 | 55 | void btrfs_init_root_block_rsv(struct btrfs_root *root); |
d12ffdd1 | 56 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, |
8bfc9b2c | 57 | enum btrfs_rsv_type type); |
d12ffdd1 JB |
58 | void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, |
59 | struct btrfs_block_rsv *rsv, | |
8bfc9b2c | 60 | enum btrfs_rsv_type type); |
d12ffdd1 JB |
61 | void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, |
62 | struct btrfs_block_rsv *rsv); | |
9270501c | 63 | int btrfs_block_rsv_add(struct btrfs_fs_info *fs_info, |
d12ffdd1 JB |
64 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
65 | enum btrfs_reserve_flush_enum flush); | |
428c8e03 | 66 | int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_percent); |
9270501c | 67 | int btrfs_block_rsv_refill(struct btrfs_fs_info *fs_info, |
4e8313e5 | 68 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
d12ffdd1 JB |
69 | enum btrfs_reserve_flush_enum flush); |
70 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, | |
71 | struct btrfs_block_rsv *dst_rsv, u64 num_bytes, | |
72 | bool update_size); | |
73 | int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes); | |
0b50174a JB |
74 | void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv, |
75 | u64 num_bytes, bool update_size); | |
63f018be | 76 | u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, |
fed14b32 JB |
77 | struct btrfs_block_rsv *block_rsv, |
78 | u64 num_bytes, u64 *qgroup_to_release); | |
67f9c220 JB |
79 | void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info); |
80 | void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info); | |
81 | void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info); | |
82 | struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans, | |
83 | struct btrfs_root *root, | |
84 | u32 blocksize); | |
54d687c1 JB |
85 | int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, |
86 | struct btrfs_block_rsv *rsv); | |
67f9c220 JB |
87 | static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info, |
88 | struct btrfs_block_rsv *block_rsv, | |
89 | u32 blocksize) | |
90 | { | |
91 | btrfs_block_rsv_add_bytes(block_rsv, blocksize, false); | |
63f018be | 92 | btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL); |
67f9c220 JB |
93 | } |
94 | ||
748f553c DS |
95 | /* |
96 | * Fast path to check if the reserve is full, may be carefully used outside of | |
97 | * locks. | |
98 | */ | |
99 | static inline bool btrfs_block_rsv_full(const struct btrfs_block_rsv *rsv) | |
100 | { | |
101 | return data_race(rsv->full); | |
102 | } | |
103 | ||
d12ffdd1 | 104 | #endif /* BTRFS_BLOCK_RSV_H */ |