| Omar Sandoval | a5ed918 | 2015-09-29 20:50:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 Facebook. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __BTRFS_FREE_SPACE_TREE |
| 20 | #define __BTRFS_FREE_SPACE_TREE |
| 21 | |
| 22 | /* |
| 23 | * The default size for new free space bitmap items. The last bitmap in a block |
| 24 | * group may be truncated, and none of the free space tree code assumes that |
| 25 | * existing bitmaps are this size. |
| 26 | */ |
| 27 | #define BTRFS_FREE_SPACE_BITMAP_SIZE 256 |
| 28 | #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE) |
| 29 | |
| 30 | void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group); |
| 31 | int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info); |
| 32 | int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info); |
| 33 | int load_free_space_tree(struct btrfs_caching_control *caching_ctl); |
| 34 | int add_block_group_free_space(struct btrfs_trans_handle *trans, |
| 35 | struct btrfs_fs_info *fs_info, |
| 36 | struct btrfs_block_group_cache *block_group); |
| 37 | int remove_block_group_free_space(struct btrfs_trans_handle *trans, |
| 38 | struct btrfs_fs_info *fs_info, |
| 39 | struct btrfs_block_group_cache *block_group); |
| 40 | int add_to_free_space_tree(struct btrfs_trans_handle *trans, |
| 41 | struct btrfs_fs_info *fs_info, |
| 42 | u64 start, u64 size); |
| 43 | int remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
| 44 | struct btrfs_fs_info *fs_info, |
| 45 | u64 start, u64 size); |
| 46 | |
| 47 | /* Exposed for testing. */ |
| 48 | struct btrfs_free_space_info * |
| 49 | search_free_space_info(struct btrfs_trans_handle *trans, |
| 50 | struct btrfs_fs_info *fs_info, |
| 51 | struct btrfs_block_group_cache *block_group, |
| 52 | struct btrfs_path *path, int cow); |
| 53 | int __add_to_free_space_tree(struct btrfs_trans_handle *trans, |
| 54 | struct btrfs_fs_info *fs_info, |
| 55 | struct btrfs_block_group_cache *block_group, |
| 56 | struct btrfs_path *path, u64 start, u64 size); |
| 57 | int __remove_from_free_space_tree(struct btrfs_trans_handle *trans, |
| 58 | struct btrfs_fs_info *fs_info, |
| 59 | struct btrfs_block_group_cache *block_group, |
| 60 | struct btrfs_path *path, u64 start, u64 size); |
| 61 | int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans, |
| 62 | struct btrfs_fs_info *fs_info, |
| 63 | struct btrfs_block_group_cache *block_group, |
| 64 | struct btrfs_path *path); |
| 65 | int convert_free_space_to_extents(struct btrfs_trans_handle *trans, |
| 66 | struct btrfs_fs_info *fs_info, |
| 67 | struct btrfs_block_group_cache *block_group, |
| 68 | struct btrfs_path *path); |
| 69 | int free_space_test_bit(struct btrfs_block_group_cache *block_group, |
| 70 | struct btrfs_path *path, u64 offset); |
| 71 | |
| 72 | #endif |