1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #ifndef BTRFS_BLOCK_RSV_H
4*4882a593Smuzhiyun #define BTRFS_BLOCK_RSV_H
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun struct btrfs_trans_handle;
7*4882a593Smuzhiyun enum btrfs_reserve_flush_enum;
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun /*
10*4882a593Smuzhiyun * Types of block reserves
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun enum {
13*4882a593Smuzhiyun BTRFS_BLOCK_RSV_GLOBAL,
14*4882a593Smuzhiyun BTRFS_BLOCK_RSV_DELALLOC,
15*4882a593Smuzhiyun BTRFS_BLOCK_RSV_TRANS,
16*4882a593Smuzhiyun BTRFS_BLOCK_RSV_CHUNK,
17*4882a593Smuzhiyun BTRFS_BLOCK_RSV_DELOPS,
18*4882a593Smuzhiyun BTRFS_BLOCK_RSV_DELREFS,
19*4882a593Smuzhiyun BTRFS_BLOCK_RSV_EMPTY,
20*4882a593Smuzhiyun BTRFS_BLOCK_RSV_TEMP,
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun struct btrfs_block_rsv {
24*4882a593Smuzhiyun u64 size;
25*4882a593Smuzhiyun u64 reserved;
26*4882a593Smuzhiyun struct btrfs_space_info *space_info;
27*4882a593Smuzhiyun spinlock_t lock;
28*4882a593Smuzhiyun unsigned short full;
29*4882a593Smuzhiyun unsigned short type;
30*4882a593Smuzhiyun unsigned short failfast;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun /*
33*4882a593Smuzhiyun * Qgroup equivalent for @size @reserved
34*4882a593Smuzhiyun *
35*4882a593Smuzhiyun * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
36*4882a593Smuzhiyun * about things like csum size nor how many tree blocks it will need to
37*4882a593Smuzhiyun * reserve.
38*4882a593Smuzhiyun *
39*4882a593Smuzhiyun * Qgroup cares more about net change of the extent usage.
40*4882a593Smuzhiyun *
41*4882a593Smuzhiyun * So for one newly inserted file extent, in worst case it will cause
42*4882a593Smuzhiyun * leaf split and level increase, nodesize for each file extent is
43*4882a593Smuzhiyun * already too much.
44*4882a593Smuzhiyun *
45*4882a593Smuzhiyun * In short, qgroup_size/reserved is the upper limit of possible needed
46*4882a593Smuzhiyun * qgroup metadata reservation.
47*4882a593Smuzhiyun */
48*4882a593Smuzhiyun u64 qgroup_rsv_size;
49*4882a593Smuzhiyun u64 qgroup_rsv_reserved;
50*4882a593Smuzhiyun };
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
53*4882a593Smuzhiyun struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
54*4882a593Smuzhiyun unsigned short type);
55*4882a593Smuzhiyun void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
56*4882a593Smuzhiyun struct btrfs_block_rsv *rsv,
57*4882a593Smuzhiyun unsigned short type);
58*4882a593Smuzhiyun void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
59*4882a593Smuzhiyun struct btrfs_block_rsv *rsv);
60*4882a593Smuzhiyun int btrfs_block_rsv_add(struct btrfs_root *root,
61*4882a593Smuzhiyun struct btrfs_block_rsv *block_rsv, u64 num_bytes,
62*4882a593Smuzhiyun enum btrfs_reserve_flush_enum flush);
63*4882a593Smuzhiyun int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
64*4882a593Smuzhiyun int btrfs_block_rsv_refill(struct btrfs_root *root,
65*4882a593Smuzhiyun struct btrfs_block_rsv *block_rsv, u64 min_reserved,
66*4882a593Smuzhiyun enum btrfs_reserve_flush_enum flush);
67*4882a593Smuzhiyun int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
68*4882a593Smuzhiyun struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
69*4882a593Smuzhiyun bool update_size);
70*4882a593Smuzhiyun int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
71*4882a593Smuzhiyun int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
72*4882a593Smuzhiyun struct btrfs_block_rsv *dest, u64 num_bytes,
73*4882a593Smuzhiyun int min_factor);
74*4882a593Smuzhiyun void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
75*4882a593Smuzhiyun u64 num_bytes, bool update_size);
76*4882a593Smuzhiyun u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
77*4882a593Smuzhiyun struct btrfs_block_rsv *block_rsv,
78*4882a593Smuzhiyun u64 num_bytes, u64 *qgroup_to_release);
79*4882a593Smuzhiyun void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info);
80*4882a593Smuzhiyun void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info);
81*4882a593Smuzhiyun void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info);
82*4882a593Smuzhiyun struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans,
83*4882a593Smuzhiyun struct btrfs_root *root,
84*4882a593Smuzhiyun u32 blocksize);
btrfs_unuse_block_rsv(struct btrfs_fs_info * fs_info,struct btrfs_block_rsv * block_rsv,u32 blocksize)85*4882a593Smuzhiyun static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info,
86*4882a593Smuzhiyun struct btrfs_block_rsv *block_rsv,
87*4882a593Smuzhiyun u32 blocksize)
88*4882a593Smuzhiyun {
89*4882a593Smuzhiyun btrfs_block_rsv_add_bytes(block_rsv, blocksize, false);
90*4882a593Smuzhiyun btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL);
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun #endif /* BTRFS_BLOCK_RSV_H */
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