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(struct btrfs_block_group *block_group,
54 struct btrfs_path *path);
55 int create_free_space_inode(struct btrfs_trans_handle *trans,
56 struct btrfs_block_group *block_group,
57 struct btrfs_path *path);
59 int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
60 struct btrfs_block_rsv *rsv);
61 int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
62 struct btrfs_block_group *block_group,
64 int load_free_space_cache(struct btrfs_block_group *block_group);
65 int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
66 struct btrfs_block_group *block_group,
67 struct btrfs_path *path);
68 int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
69 struct btrfs_block_group *block_group,
70 struct btrfs_path *path);
71 struct inode *lookup_free_ino_inode(struct btrfs_root *root,
72 struct btrfs_path *path);
73 int create_free_ino_inode(struct btrfs_root *root,
74 struct btrfs_trans_handle *trans,
75 struct btrfs_path *path);
76 int load_free_ino_cache(struct btrfs_fs_info *fs_info,
77 struct btrfs_root *root);
78 int btrfs_write_out_ino_cache(struct btrfs_root *root,
79 struct btrfs_trans_handle *trans,
80 struct btrfs_path *path,
83 void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group);
84 int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
85 struct btrfs_free_space_ctl *ctl,
86 u64 bytenr, u64 size);
87 int btrfs_add_free_space(struct btrfs_block_group *block_group,
88 u64 bytenr, u64 size);
89 int btrfs_remove_free_space(struct btrfs_block_group *block_group,
90 u64 bytenr, u64 size);
91 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
92 void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group);
93 u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group,
94 u64 offset, u64 bytes, u64 empty_size,
95 u64 *max_extent_size);
96 u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
97 void btrfs_dump_free_space(struct btrfs_block_group *block_group,
99 int btrfs_find_space_cluster(struct btrfs_block_group *block_group,
100 struct btrfs_free_cluster *cluster,
101 u64 offset, u64 bytes, u64 empty_size);
102 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
103 u64 btrfs_alloc_from_cluster(struct btrfs_block_group *block_group,
104 struct btrfs_free_cluster *cluster, u64 bytes,
105 u64 min_start, u64 *max_extent_size);
106 int btrfs_return_cluster_to_free_space(
107 struct btrfs_block_group *block_group,
108 struct btrfs_free_cluster *cluster);
109 int btrfs_trim_block_group(struct btrfs_block_group *block_group,
110 u64 *trimmed, u64 start, u64 end, u64 minlen);
112 /* Support functions for running our sanity tests */
113 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
114 int test_add_free_space_entry(struct btrfs_block_group *cache,
115 u64 offset, u64 bytes, bool bitmap);
116 int test_check_exists(struct btrfs_block_group *cache, u64 offset, u64 bytes);