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 btrfs_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 btrfs_load_free_space_tree(struct btrfs_caching_control *caching_ctl); 30 int btrfs_add_block_group_free_space(struct btrfs_trans_handle *trans, 31 struct btrfs_block_group *block_group); 32 int btrfs_remove_block_group_free_space(struct btrfs_trans_handle *trans, 33 struct btrfs_block_group *block_group); 34 int btrfs_add_to_free_space_tree(struct btrfs_trans_handle *trans, 35 u64 start, u64 size); 36 int btrfs_remove_from_free_space_tree(struct btrfs_trans_handle *trans, 37 u64 start, u64 size); 38 int btrfs_delete_orphan_free_space_entries(struct btrfs_fs_info *fs_info); 39 struct btrfs_free_space_info * 40 btrfs_search_free_space_info(struct btrfs_trans_handle *trans, 41 struct btrfs_block_group *block_group, 42 struct btrfs_path *path, int cow); 43 struct btrfs_root *btrfs_free_space_root(struct btrfs_block_group *block_group); 44 45 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 46 int __btrfs_add_to_free_space_tree(struct btrfs_trans_handle *trans, 47 struct btrfs_block_group *block_group, 48 struct btrfs_path *path, u64 start, u64 size); 49 int __btrfs_remove_from_free_space_tree(struct btrfs_trans_handle *trans, 50 struct btrfs_block_group *block_group, 51 struct btrfs_path *path, u64 start, u64 size); 52 int btrfs_convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, 53 struct btrfs_block_group *block_group, 54 struct btrfs_path *path); 55 int btrfs_convert_free_space_to_extents(struct btrfs_trans_handle *trans, 56 struct btrfs_block_group *block_group, 57 struct btrfs_path *path); 58 bool btrfs_free_space_test_bit(struct btrfs_block_group *block_group, 59 struct btrfs_path *path, u64 offset); 60 #endif 61 62 #endif 63