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a5ed9182 OS |
1 | /* |
2 | * Copyright (C) 2015 Facebook. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __BTRFS_FREE_SPACE_TREE | |
20 | #define __BTRFS_FREE_SPACE_TREE | |
21 | ||
22 | /* | |
23 | * The default size for new free space bitmap items. The last bitmap in a block | |
24 | * group may be truncated, and none of the free space tree code assumes that | |
25 | * existing bitmaps are this size. | |
26 | */ | |
27 | #define BTRFS_FREE_SPACE_BITMAP_SIZE 256 | |
28 | #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE) | |
29 | ||
30 | void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group); | |
31 | int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info); | |
32 | int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info); | |
33 | int load_free_space_tree(struct btrfs_caching_control *caching_ctl); | |
34 | int add_block_group_free_space(struct btrfs_trans_handle *trans, | |
35 | struct btrfs_fs_info *fs_info, | |
36 | struct btrfs_block_group_cache *block_group); | |
37 | int remove_block_group_free_space(struct btrfs_trans_handle *trans, | |
38 | struct btrfs_fs_info *fs_info, | |
39 | struct btrfs_block_group_cache *block_group); | |
40 | int add_to_free_space_tree(struct btrfs_trans_handle *trans, | |
41 | struct btrfs_fs_info *fs_info, | |
42 | u64 start, u64 size); | |
43 | int remove_from_free_space_tree(struct btrfs_trans_handle *trans, | |
44 | struct btrfs_fs_info *fs_info, | |
45 | u64 start, u64 size); | |
46 | ||
47 | /* Exposed for testing. */ | |
48 | struct btrfs_free_space_info * | |
49 | search_free_space_info(struct btrfs_trans_handle *trans, | |
50 | struct btrfs_fs_info *fs_info, | |
51 | struct btrfs_block_group_cache *block_group, | |
52 | struct btrfs_path *path, int cow); | |
53 | int __add_to_free_space_tree(struct btrfs_trans_handle *trans, | |
54 | struct btrfs_fs_info *fs_info, | |
55 | struct btrfs_block_group_cache *block_group, | |
56 | struct btrfs_path *path, u64 start, u64 size); | |
57 | int __remove_from_free_space_tree(struct btrfs_trans_handle *trans, | |
58 | struct btrfs_fs_info *fs_info, | |
59 | struct btrfs_block_group_cache *block_group, | |
60 | struct btrfs_path *path, u64 start, u64 size); | |
61 | int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, | |
62 | struct btrfs_fs_info *fs_info, | |
63 | struct btrfs_block_group_cache *block_group, | |
64 | struct btrfs_path *path); | |
65 | int convert_free_space_to_extents(struct btrfs_trans_handle *trans, | |
66 | struct btrfs_fs_info *fs_info, | |
67 | struct btrfs_block_group_cache *block_group, | |
68 | struct btrfs_path *path); | |
69 | int free_space_test_bit(struct btrfs_block_group_cache *block_group, | |
70 | struct btrfs_path *path, u64 offset); | |
71 | ||
72 | #endif |