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