[linux-2.6-block.git] / fs / btrfs / free-space-tree.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2015 Facebook.  All rights reserved.
 */

#ifndef BTRFS_FREE_SPACE_TREE_H
#define BTRFS_FREE_SPACE_TREE_H

/*
 * The default size for new free space bitmap items. The last bitmap in a block
 * group may be truncated, and none of the free space tree code assumes that
 * existing bitmaps are this size.
 */
#define BTRFS_FREE_SPACE_BITMAP_SIZE 256
#define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)

void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
int add_block_group_free_space(struct btrfs_trans_handle *trans,
			       struct btrfs_fs_info *fs_info,
			       struct btrfs_block_group_cache *block_group);
int remove_block_group_free_space(struct btrfs_trans_handle *trans,
				  struct btrfs_fs_info *fs_info,
				  struct btrfs_block_group_cache *block_group);
int add_to_free_space_tree(struct btrfs_trans_handle *trans,
			   struct btrfs_fs_info *fs_info,
			   u64 start, u64 size);
int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
				struct btrfs_fs_info *fs_info,
				u64 start, u64 size);

#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
struct btrfs_free_space_info *
search_free_space_info(struct btrfs_trans_handle *trans,
		       struct btrfs_fs_info *fs_info,
		       struct btrfs_block_group_cache *block_group,
		       struct btrfs_path *path, int cow);
int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
			     struct btrfs_fs_info *fs_info,
			     struct btrfs_block_group_cache *block_group,
			     struct btrfs_path *path, u64 start, u64 size);
int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
				  struct btrfs_fs_info *fs_info,
				  struct btrfs_block_group_cache *block_group,
				  struct btrfs_path *path, u64 start, u64 size);
int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
				  struct btrfs_fs_info *fs_info,
				  struct btrfs_block_group_cache *block_group,
				  struct btrfs_path *path);
int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
				  struct btrfs_fs_info *fs_info,
				  struct btrfs_block_group_cache *block_group,
				  struct btrfs_path *path);
int free_space_test_bit(struct btrfs_block_group_cache *block_group,
			struct btrfs_path *path, u64 offset);
#endif

#endif
Commit	Line	Data
9888c340	1	/* SPDX-License-Identifier: GPL-2.0 */
a5ed9182 OS	2	/*
a5ed9182 OS	3	* Copyright (C) 2015 Facebook. All rights reserved.
a5ed9182 OS	4	*/
a5ed9182 OS	5
9888c340 DS	6	#ifndef BTRFS_FREE_SPACE_TREE_H
9888c340 DS	7	#define BTRFS_FREE_SPACE_TREE_H
a5ed9182 OS	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
	17	void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
	18	int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
	19	int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
	20	int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
	21	int 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);
	24	int 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);
	27	int add_to_free_space_tree(struct btrfs_trans_handle *trans,
	28	struct btrfs_fs_info *fs_info,
	29	u64 start, u64 size);
	30	int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
	31	struct btrfs_fs_info *fs_info,
	32	u64 start, u64 size);
	33
2d77ab3c	34	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
a5ed9182 OS	35	struct btrfs_free_space_info *
	36	search_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);
	40	int __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);
	44	int __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);
	48	int 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);
	52	int 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);
	56	int free_space_test_bit(struct btrfs_block_group_cache *block_group,
	57	struct btrfs_path *path, u64 offset);
2d77ab3c	58	#endif
a5ed9182 OS	59
a5ed9182 OS	60	#endif