7624f2a1f8e759ae8b036ce966d671dfb4051617
[sfrench/cifs-2.6.git] / fs / btrfs / free-space-tree.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2015 Facebook.  All rights reserved.
4  */
5
6 #ifndef BTRFS_FREE_SPACE_TREE_H
7 #define BTRFS_FREE_SPACE_TREE_H
8
9 /*
10  * The default size for new free space bitmap items. The last bitmap in a block
11  * group may be truncated, and none of the free space tree code assumes that
12  * existing bitmaps are this size.
13  */
14 #define BTRFS_FREE_SPACE_BITMAP_SIZE 256
15 #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
16
17 void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
18 int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
19 int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
20 int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
21 int add_block_group_free_space(struct btrfs_trans_handle *trans,
22                                struct btrfs_block_group_cache *block_group);
23 int remove_block_group_free_space(struct btrfs_trans_handle *trans,
24                                   struct btrfs_block_group_cache *block_group);
25 int add_to_free_space_tree(struct btrfs_trans_handle *trans,
26                            struct btrfs_fs_info *fs_info,
27                            u64 start, u64 size);
28 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
29                                 struct btrfs_fs_info *fs_info,
30                                 u64 start, u64 size);
31
32 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
33 struct btrfs_free_space_info *
34 search_free_space_info(struct btrfs_trans_handle *trans,
35                        struct btrfs_fs_info *fs_info,
36                        struct btrfs_block_group_cache *block_group,
37                        struct btrfs_path *path, int cow);
38 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
39                              struct btrfs_block_group_cache *block_group,
40                              struct btrfs_path *path, u64 start, u64 size);
41 int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
42                                   struct btrfs_fs_info *fs_info,
43                                   struct btrfs_block_group_cache *block_group,
44                                   struct btrfs_path *path, u64 start, u64 size);
45 int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
46                                   struct btrfs_block_group_cache *block_group,
47                                   struct btrfs_path *path);
48 int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
49                                   struct btrfs_block_group_cache *block_group,
50                                   struct btrfs_path *path);
51 int free_space_test_bit(struct btrfs_block_group_cache *block_group,
52                         struct btrfs_path *path, u64 offset);
53 #endif
54
55 #endif