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 | #include <linux/bits.h> |
10 | |
11 | struct btrfs_caching_control; |
12 | struct btrfs_fs_info; |
13 | struct btrfs_path; |
14 | struct btrfs_block_group; |
15 | struct btrfs_trans_handle; |
16 | |
17 | /* |
18 | * The default size for new free space bitmap items. The last bitmap in a block |
19 | * group may be truncated, and none of the free space tree code assumes that |
20 | * existing bitmaps are this size. |
21 | */ |
22 | #define BTRFS_FREE_SPACE_BITMAP_SIZE 256 |
23 | #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE) |
24 | |
25 | void set_free_space_tree_thresholds(struct btrfs_block_group *block_group); |
26 | int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info); |
27 | int btrfs_delete_free_space_tree(struct btrfs_fs_info *fs_info); |
28 | int btrfs_rebuild_free_space_tree(struct btrfs_fs_info *fs_info); |
29 | int load_free_space_tree(struct btrfs_caching_control *caching_ctl); |
30 | int add_block_group_free_space(struct btrfs_trans_handle *trans, |
31 | struct btrfs_block_group *block_group); |
32 | int remove_block_group_free_space(struct btrfs_trans_handle *trans, |
33 | struct btrfs_block_group *block_group); |
34 | int add_to_free_space_tree(struct btrfs_trans_handle *trans, |
35 | u64 start, u64 size); |
36 | int remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
37 | u64 start, u64 size); |
38 | |
39 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
40 | struct btrfs_free_space_info * |
41 | search_free_space_info(struct btrfs_trans_handle *trans, |
42 | struct btrfs_block_group *block_group, |
43 | struct btrfs_path *path, int cow); |
44 | int __add_to_free_space_tree(struct btrfs_trans_handle *trans, |
45 | struct btrfs_block_group *block_group, |
46 | struct btrfs_path *path, u64 start, u64 size); |
47 | int __remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
48 | struct btrfs_block_group *block_group, |
49 | struct btrfs_path *path, u64 start, u64 size); |
50 | int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, |
51 | struct btrfs_block_group *block_group, |
52 | struct btrfs_path *path); |
53 | int convert_free_space_to_extents(struct btrfs_trans_handle *trans, |
54 | struct btrfs_block_group *block_group, |
55 | struct btrfs_path *path); |
56 | int free_space_test_bit(struct btrfs_block_group *block_group, |
57 | struct btrfs_path *path, u64 offset); |
58 | #endif |
59 | |
60 | #endif |
61 | |