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
 9struct btrfs_caching_control;
10
11/*
12 * The default size for new free space bitmap items. The last bitmap in a block
13 * group may be truncated, and none of the free space tree code assumes that
14 * existing bitmaps are this size.
15 */
16#define BTRFS_FREE_SPACE_BITMAP_SIZE 256
17#define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
18
19void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
20int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
21int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
22int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
23int add_block_group_free_space(struct btrfs_trans_handle *trans,
 
24			       struct btrfs_block_group_cache *block_group);
25int remove_block_group_free_space(struct btrfs_trans_handle *trans,
 
26				  struct btrfs_block_group_cache *block_group);
27int add_to_free_space_tree(struct btrfs_trans_handle *trans,
 
28			   u64 start, u64 size);
29int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
 
30				u64 start, u64 size);
31
32#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
33struct btrfs_free_space_info *
34search_free_space_info(struct btrfs_trans_handle *trans,
 
35		       struct btrfs_block_group_cache *block_group,
36		       struct btrfs_path *path, int cow);
37int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
 
38			     struct btrfs_block_group_cache *block_group,
39			     struct btrfs_path *path, u64 start, u64 size);
40int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
 
41				  struct btrfs_block_group_cache *block_group,
42				  struct btrfs_path *path, u64 start, u64 size);
43int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
 
44				  struct btrfs_block_group_cache *block_group,
45				  struct btrfs_path *path);
46int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
 
47				  struct btrfs_block_group_cache *block_group,
48				  struct btrfs_path *path);
49int free_space_test_bit(struct btrfs_block_group_cache *block_group,
50			struct btrfs_path *path, u64 offset);
51#endif
52
53#endif

 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
17void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
18int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
19int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
20int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
21int add_block_group_free_space(struct btrfs_trans_handle *trans,
22			       struct btrfs_fs_info *fs_info,
23			       struct btrfs_block_group_cache *block_group);
24int remove_block_group_free_space(struct btrfs_trans_handle *trans,
25				  struct btrfs_fs_info *fs_info,
26				  struct btrfs_block_group_cache *block_group);
27int add_to_free_space_tree(struct btrfs_trans_handle *trans,
28			   struct btrfs_fs_info *fs_info,
29			   u64 start, u64 size);
30int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
31				struct btrfs_fs_info *fs_info,
32				u64 start, u64 size);
33
34#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
35struct btrfs_free_space_info *
36search_free_space_info(struct btrfs_trans_handle *trans,
37		       struct btrfs_fs_info *fs_info,
38		       struct btrfs_block_group_cache *block_group,
39		       struct btrfs_path *path, int cow);
40int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
41			     struct btrfs_fs_info *fs_info,
42			     struct btrfs_block_group_cache *block_group,
43			     struct btrfs_path *path, u64 start, u64 size);
44int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
45				  struct btrfs_fs_info *fs_info,
46				  struct btrfs_block_group_cache *block_group,
47				  struct btrfs_path *path, u64 start, u64 size);
48int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
49				  struct btrfs_fs_info *fs_info,
50				  struct btrfs_block_group_cache *block_group,
51				  struct btrfs_path *path);
52int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
53				  struct btrfs_fs_info *fs_info,
54				  struct btrfs_block_group_cache *block_group,
55				  struct btrfs_path *path);
56int free_space_test_bit(struct btrfs_block_group_cache *block_group,
57			struct btrfs_path *path, u64 offset);
58#endif
59
60#endif