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19#ifndef __BTRFS_FREE_SPACE_CACHE
20#define __BTRFS_FREE_SPACE_CACHE
21
22struct btrfs_free_space {
23 struct rb_node offset_index;
24 u64 offset;
25 u64 bytes;
26 unsigned long *bitmap;
27 struct list_head list;
28};
29
30struct btrfs_free_space_ctl {
31 spinlock_t tree_lock;
32 struct rb_root free_space_offset;
33 u64 free_space;
34 int extents_thresh;
35 int free_extents;
36 int total_bitmaps;
37 int unit;
38 u64 start;
39 struct btrfs_free_space_op *op;
40 void *private;
41 struct mutex cache_writeout_mutex;
42 struct list_head trimming_ranges;
43};
44
45struct btrfs_free_space_op {
46 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
47 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
48 struct btrfs_free_space *info);
49};
50
51struct inode *lookup_free_space_inode(struct btrfs_root *root,
52 struct btrfs_block_group_cache
53 *block_group, struct btrfs_path *path);
54int create_free_space_inode(struct btrfs_root *root,
55 struct btrfs_trans_handle *trans,
56 struct btrfs_block_group_cache *block_group,
57 struct btrfs_path *path);
58
59int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
60 struct btrfs_block_rsv *rsv);
61int btrfs_truncate_free_space_cache(struct btrfs_root *root,
62 struct btrfs_trans_handle *trans,
63 struct inode *inode);
64int load_free_space_cache(struct btrfs_fs_info *fs_info,
65 struct btrfs_block_group_cache *block_group);
66int btrfs_write_out_cache(struct btrfs_root *root,
67 struct btrfs_trans_handle *trans,
68 struct btrfs_block_group_cache *block_group,
69 struct btrfs_path *path);
70
71struct inode *lookup_free_ino_inode(struct btrfs_root *root,
72 struct btrfs_path *path);
73int create_free_ino_inode(struct btrfs_root *root,
74 struct btrfs_trans_handle *trans,
75 struct btrfs_path *path);
76int load_free_ino_cache(struct btrfs_fs_info *fs_info,
77 struct btrfs_root *root);
78int btrfs_write_out_ino_cache(struct btrfs_root *root,
79 struct btrfs_trans_handle *trans,
80 struct btrfs_path *path,
81 struct inode *inode);
82
83void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
84int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
85 u64 bytenr, u64 size);
86static inline int
87btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
88 u64 bytenr, u64 size)
89{
90 return __btrfs_add_free_space(block_group->free_space_ctl,
91 bytenr, size);
92}
93int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
94 u64 bytenr, u64 size);
95void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
96void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
97 *block_group);
98u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
99 u64 offset, u64 bytes, u64 empty_size,
100 u64 *max_extent_size);
101u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
102void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
103 u64 bytes);
104int btrfs_find_space_cluster(struct btrfs_root *root,
105 struct btrfs_block_group_cache *block_group,
106 struct btrfs_free_cluster *cluster,
107 u64 offset, u64 bytes, u64 empty_size);
108void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
109u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
110 struct btrfs_free_cluster *cluster, u64 bytes,
111 u64 min_start, u64 *max_extent_size);
112int btrfs_return_cluster_to_free_space(
113 struct btrfs_block_group_cache *block_group,
114 struct btrfs_free_cluster *cluster);
115int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
116 u64 *trimmed, u64 start, u64 end, u64 minlen);
117
118
119#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
120int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
121 u64 offset, u64 bytes, bool bitmap);
122int test_check_exists(struct btrfs_block_group_cache *cache,
123 u64 offset, u64 bytes);
124#endif
125
126#endif
127
