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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 u64 max_extent_size;
27 unsigned long *bitmap;
28 struct list_head list;
29};
30
31struct btrfs_free_space_ctl {
32 spinlock_t tree_lock;
33 struct rb_root free_space_offset;
34 u64 free_space;
35 int extents_thresh;
36 int free_extents;
37 int total_bitmaps;
38 int unit;
39 u64 start;
40 struct btrfs_free_space_op *op;
41 void *private;
42 struct mutex cache_writeout_mutex;
43 struct list_head trimming_ranges;
44};
45
46struct btrfs_free_space_op {
47 void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl);
48 bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl,
49 struct btrfs_free_space *info);
50};
51
52struct btrfs_io_ctl;
53
54struct inode *lookup_free_space_inode(struct btrfs_root *root,
55 struct btrfs_block_group_cache
56 *block_group, struct btrfs_path *path);
57int create_free_space_inode(struct btrfs_root *root,
58 struct btrfs_trans_handle *trans,
59 struct btrfs_block_group_cache *block_group,
60 struct btrfs_path *path);
61
62int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
63 struct btrfs_block_rsv *rsv);
64int btrfs_truncate_free_space_cache(struct btrfs_root *root,
65 struct btrfs_trans_handle *trans,
66 struct btrfs_block_group_cache *block_group,
67 struct inode *inode);
68int load_free_space_cache(struct btrfs_fs_info *fs_info,
69 struct btrfs_block_group_cache *block_group);
70int btrfs_wait_cache_io(struct btrfs_root *root,
71 struct btrfs_trans_handle *trans,
72 struct btrfs_block_group_cache *block_group,
73 struct btrfs_io_ctl *io_ctl,
74 struct btrfs_path *path, u64 offset);
75int btrfs_write_out_cache(struct btrfs_root *root,
76 struct btrfs_trans_handle *trans,
77 struct btrfs_block_group_cache *block_group,
78 struct btrfs_path *path);
79struct inode *lookup_free_ino_inode(struct btrfs_root *root,
80 struct btrfs_path *path);
81int create_free_ino_inode(struct btrfs_root *root,
82 struct btrfs_trans_handle *trans,
83 struct btrfs_path *path);
84int load_free_ino_cache(struct btrfs_fs_info *fs_info,
85 struct btrfs_root *root);
86int btrfs_write_out_ino_cache(struct btrfs_root *root,
87 struct btrfs_trans_handle *trans,
88 struct btrfs_path *path,
89 struct inode *inode);
90
91void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
92int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl,
93 u64 bytenr, u64 size);
94static inline int
95btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
96 u64 bytenr, u64 size)
97{
98 return __btrfs_add_free_space(block_group->free_space_ctl,
99 bytenr, size);
100}
101int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
102 u64 bytenr, u64 size);
103void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
104void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
105 *block_group);
106u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
107 u64 offset, u64 bytes, u64 empty_size,
108 u64 *max_extent_size);
109u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
110void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
111 u64 bytes);
112int btrfs_find_space_cluster(struct btrfs_root *root,
113 struct btrfs_block_group_cache *block_group,
114 struct btrfs_free_cluster *cluster,
115 u64 offset, u64 bytes, u64 empty_size);
116void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
117u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
118 struct btrfs_free_cluster *cluster, u64 bytes,
119 u64 min_start, u64 *max_extent_size);
120int btrfs_return_cluster_to_free_space(
121 struct btrfs_block_group_cache *block_group,
122 struct btrfs_free_cluster *cluster);
123int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
124 u64 *trimmed, u64 start, u64 end, u64 minlen);
125
126
127#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
128int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
129 u64 offset, u64 bytes, bool bitmap);
130int test_check_exists(struct btrfs_block_group_cache *cache,
131 u64 offset, u64 bytes);
132#endif
133
134#endif
135
