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
11struct btrfs_caching_control;
12struct btrfs_fs_info;
13struct btrfs_path;
14struct btrfs_block_group;
15struct 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
25void set_free_space_tree_thresholds(struct btrfs_block_group *block_group);
26int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
27int btrfs_delete_free_space_tree(struct btrfs_fs_info *fs_info);
28int btrfs_rebuild_free_space_tree(struct btrfs_fs_info *fs_info);
29int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
30int add_block_group_free_space(struct btrfs_trans_handle *trans,
31			       struct btrfs_block_group *block_group);
32int remove_block_group_free_space(struct btrfs_trans_handle *trans,
33				  struct btrfs_block_group *block_group);
34int add_to_free_space_tree(struct btrfs_trans_handle *trans,
35			   u64 start, u64 size);
36int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
37				u64 start, u64 size);
38
39#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
40struct btrfs_free_space_info *
41search_free_space_info(struct btrfs_trans_handle *trans,
42		       struct btrfs_block_group *block_group,
43		       struct btrfs_path *path, int cow);
44int __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);
47int __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);
50int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
51				  struct btrfs_block_group *block_group,
52				  struct btrfs_path *path);
53int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
54				  struct btrfs_block_group *block_group,
55				  struct btrfs_path *path);
56int free_space_test_bit(struct btrfs_block_group *block_group,
57			struct btrfs_path *path, u64 offset);
58#endif
59
60#endif
61