8c028efe4a
To help implement free space tree checker in user space some kernel function are necessary, namely iterating/deleting/adding freespace items, some internal search functions. Functions to populate a block group based on the extent tree. The code is largely copy/paste from the kernel with locking eliminated (i.e free_space_lock). It supports reading/writing of both bitmap and extent based FST trees. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2015 Facebook. 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_TREE_H__
|
|
#define __BTRFS_FREE_SPACE_TREE_H__
|
|
|
|
#define BTRFS_FREE_SPACE_BITMAP_SIZE 256
|
|
#define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
|
|
|
|
int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
|
|
int load_free_space_tree(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_block_group_cache *block_group);
|
|
int populate_free_space_tree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group);
|
|
int remove_block_group_free_space(struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group_cache *block_group);
|
|
int add_to_free_space_tree(struct btrfs_trans_handle *trans, u64 start,
|
|
u64 size);
|
|
int remove_from_free_space_tree(struct btrfs_trans_handle *trans, u64 start,
|
|
u64 size);
|
|
int btrfs_create_free_space_tree(struct btrfs_fs_info *info);
|
|
|
|
#endif
|