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