1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2015 Facebook. All rights reserved.
6 #ifndef BTRFS_FREE_SPACE_TREE_H
7 #define BTRFS_FREE_SPACE_TREE_H
9 #include <linux/bits.h>
11 struct btrfs_caching_control;
14 struct btrfs_block_group;
15 struct btrfs_trans_handle;
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.
22 #define BTRFS_FREE_SPACE_BITMAP_SIZE 256
23 #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
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,
36 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
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);