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