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6#ifndef BTRFS_FREE_SPACE_CACHE_H
7#define BTRFS_FREE_SPACE_CACHE_H
8
9struct btrfs_free_space {
10 struct rb_node offset_index;
11 u64 offset;
12 u64 bytes;
13 u64 max_extent_size;
14 unsigned long *bitmap;
15 struct list_head list;
16};
17
18struct btrfs_free_space_ctl {
19 spinlock_t tree_lock;
20 struct rb_root free_space_offset;
21 u64 free_space;
22 int extents_thresh;
23 int free_extents;
24 int total_bitmaps;
25 int unit;
26 u64 start;
27 const struct btrfs_free_space_op *op;
28 void *private;
29 struct mutex cache_writeout_mutex;
30 struct list_head trimming_ranges;
31};
32
33struct btrfs_free_space_op {
34 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
35 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
36 struct btrfs_free_space *info);
37};
38
39struct btrfs_io_ctl;
40
41struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
42 struct btrfs_block_group_cache
43 *block_group, struct btrfs_path *path);
44int create_free_space_inode(struct btrfs_fs_info *fs_info,
45 struct btrfs_trans_handle *trans,
46 struct btrfs_block_group_cache *block_group,
47 struct btrfs_path *path);
48
49int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
50 struct btrfs_block_rsv *rsv);
51int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
52 struct btrfs_block_group_cache *block_group,
53 struct inode *inode);
54int load_free_space_cache(struct btrfs_fs_info *fs_info,
55 struct btrfs_block_group_cache *block_group);
56int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
57 struct btrfs_block_group_cache *block_group,
58 struct btrfs_path *path);
59int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
60 struct btrfs_trans_handle *trans,
61 struct btrfs_block_group_cache *block_group,
62 struct btrfs_path *path);
63struct inode *lookup_free_ino_inode(struct btrfs_root *root,
64 struct btrfs_path *path);
65int create_free_ino_inode(struct btrfs_root *root,
66 struct btrfs_trans_handle *trans,
67 struct btrfs_path *path);
68int load_free_ino_cache(struct btrfs_fs_info *fs_info,
69 struct btrfs_root *root);
70int btrfs_write_out_ino_cache(struct btrfs_root *root,
71 struct btrfs_trans_handle *trans,
72 struct btrfs_path *path,
73 struct inode *inode);
74
75void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
76int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
77 struct btrfs_free_space_ctl *ctl,
78 u64 bytenr, u64 size);
79static inline int
80btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
81 u64 bytenr, u64 size)
82{
83 return __btrfs_add_free_space(block_group->fs_info,
84 block_group->free_space_ctl,
85 bytenr, size);
86}
87int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
88 u64 bytenr, u64 size);
89void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
90void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
91 *block_group);
92u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
93 u64 offset, u64 bytes, u64 empty_size,
94 u64 *max_extent_size);
95u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
96void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
97 u64 bytes);
98int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
99 struct btrfs_block_group_cache *block_group,
100 struct btrfs_free_cluster *cluster,
101 u64 offset, u64 bytes, u64 empty_size);
102void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
103u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
104 struct btrfs_free_cluster *cluster, u64 bytes,
105 u64 min_start, u64 *max_extent_size);
106int btrfs_return_cluster_to_free_space(
107 struct btrfs_block_group_cache *block_group,
108 struct btrfs_free_cluster *cluster);
109int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
110 u64 *trimmed, u64 start, u64 end, u64 minlen);
111
112
113#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
114int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
115 u64 offset, u64 bytes, bool bitmap);
116int test_check_exists(struct btrfs_block_group_cache *cache,
117 u64 offset, u64 bytes);
118#endif
119
120#endif
121
