1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2009 Oracle. All rights reserved.
6 #ifndef BTRFS_FREE_SPACE_CACHE_H
7 #define BTRFS_FREE_SPACE_CACHE_H
9 struct btrfs_free_space {
10 struct rb_node offset_index;
14 unsigned long *bitmap;
15 struct list_head list;
18 struct btrfs_free_space_ctl {
20 struct rb_root free_space_offset;
27 const struct btrfs_free_space_op *op;
29 struct mutex cache_writeout_mutex;
30 struct list_head trimming_ranges;
33 struct 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);
43 struct btrfs_fs_info *fs_info;
50 unsigned check_crcs:1;
53 struct inode *lookup_free_space_inode(
54 struct btrfs_block_group_cache *block_group,
55 struct btrfs_path *path);
56 int create_free_space_inode(struct btrfs_trans_handle *trans,
57 struct btrfs_block_group_cache *block_group,
58 struct btrfs_path *path);
60 int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
61 struct btrfs_block_rsv *rsv);
62 int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
63 struct btrfs_block_group_cache *block_group,
65 int load_free_space_cache(struct btrfs_block_group_cache *block_group);
66 int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
67 struct btrfs_block_group_cache *block_group,
68 struct btrfs_path *path);
69 int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
70 struct btrfs_block_group_cache *block_group,
71 struct btrfs_path *path);
72 struct inode *lookup_free_ino_inode(struct btrfs_root *root,
73 struct btrfs_path *path);
74 int create_free_ino_inode(struct btrfs_root *root,
75 struct btrfs_trans_handle *trans,
76 struct btrfs_path *path);
77 int load_free_ino_cache(struct btrfs_fs_info *fs_info,
78 struct btrfs_root *root);
79 int btrfs_write_out_ino_cache(struct btrfs_root *root,
80 struct btrfs_trans_handle *trans,
81 struct btrfs_path *path,
84 void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
85 int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
86 struct btrfs_free_space_ctl *ctl,
87 u64 bytenr, u64 size);
88 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
89 u64 bytenr, u64 size);
90 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
91 u64 bytenr, u64 size);
92 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
93 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
95 u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
96 u64 offset, u64 bytes, u64 empty_size,
97 u64 *max_extent_size);
98 u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
99 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
101 int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
102 struct btrfs_free_cluster *cluster,
103 u64 offset, u64 bytes, u64 empty_size);
104 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
105 u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
106 struct btrfs_free_cluster *cluster, u64 bytes,
107 u64 min_start, u64 *max_extent_size);
108 int btrfs_return_cluster_to_free_space(
109 struct btrfs_block_group_cache *block_group,
110 struct btrfs_free_cluster *cluster);
111 int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
112 u64 *trimmed, u64 start, u64 end, u64 minlen);
114 /* Support functions for running our sanity tests */
115 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
116 int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
117 u64 offset, u64 bytes, bool bitmap);
118 int test_check_exists(struct btrfs_block_group_cache *cache,
119 u64 offset, u64 bytes);