| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | /* |
| 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_block_group_cache *block_group); |
| 23 | int remove_block_group_free_space(struct btrfs_trans_handle *trans, |
| 24 | struct btrfs_block_group_cache *block_group); |
| 25 | int add_to_free_space_tree(struct btrfs_trans_handle *trans, |
| 26 | u64 start, u64 size); |
| 27 | int remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
| 28 | u64 start, u64 size); |
| 29 | |
| 30 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 31 | struct btrfs_free_space_info * |
| 32 | search_free_space_info(struct btrfs_trans_handle *trans, |
| 33 | struct btrfs_fs_info *fs_info, |
| 34 | struct btrfs_block_group_cache *block_group, |
| 35 | struct btrfs_path *path, int cow); |
| 36 | int __add_to_free_space_tree(struct btrfs_trans_handle *trans, |
| 37 | struct btrfs_block_group_cache *block_group, |
| 38 | struct btrfs_path *path, u64 start, u64 size); |
| 39 | int __remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
| 40 | struct btrfs_block_group_cache *block_group, |
| 41 | struct btrfs_path *path, u64 start, u64 size); |
| 42 | int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, |
| 43 | struct btrfs_block_group_cache *block_group, |
| 44 | struct btrfs_path *path); |
| 45 | int convert_free_space_to_extents(struct btrfs_trans_handle *trans, |
| 46 | struct btrfs_block_group_cache *block_group, |
| 47 | struct btrfs_path *path); |
| 48 | int free_space_test_bit(struct btrfs_block_group_cache *block_group, |
| 49 | struct btrfs_path *path, u64 offset); |
| 50 | #endif |
| 51 | |
| 52 | #endif |