| /* |
| * Copyright (C) 2009 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #ifndef __BTRFS_FREE_SPACE_CACHE_H__ |
| #define __BTRFS_FREE_SPACE_CACHE_H__ |
| |
| #include "kerncompat.h" |
| #include "ctree.h" |
| #include "rbtree.h" |
| |
| struct btrfs_free_space { |
| struct rb_node offset_index; |
| u64 offset; |
| u64 bytes; |
| unsigned long *bitmap; |
| struct list_head list; |
| }; |
| |
| struct btrfs_free_space_ctl { |
| struct rb_root free_space_offset; |
| u64 free_space; |
| int extents_thresh; |
| int free_extents; |
| int total_bitmaps; |
| int unit; |
| u64 start; |
| void *private; |
| u32 sectorsize; |
| }; |
| |
| int load_free_space_cache(struct btrfs_fs_info *fs_info, |
| struct btrfs_block_group_cache *block_group); |
| |
| void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl); |
| void btrfs_remove_free_space_cache(struct btrfs_block_group_cache |
| *block_group); |
| void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, |
| u64 bytes); |
| struct btrfs_free_space * |
| btrfs_find_free_space(struct btrfs_free_space_ctl *ctl, u64 offset, u64 bytes); |
| int btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group, |
| int sectorsize); |
| void unlink_free_space(struct btrfs_free_space_ctl *ctl, |
| struct btrfs_free_space *info); |
| #endif |