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1 /*
2  * Copyright (C) 2011 STRATO.  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_BACKREF__
20 #define __BTRFS_BACKREF__
21 
22 #include "ioctl.h"
23 #include "ulist.h"
24 
25 #define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0)
26 
27 struct inode_fs_paths {
28 	struct btrfs_path		*btrfs_path;
29 	struct btrfs_root		*fs_root;
30 	struct btrfs_data_container	*fspath;
31 };
32 
33 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
34 		void *ctx);
35 typedef int (iterate_irefs_t)(u64 parent, struct btrfs_inode_ref *iref,
36 				struct extent_buffer *eb, void *ctx);
37 
38 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
39 			struct btrfs_path *path);
40 
41 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
42 			struct btrfs_path *path, struct btrfs_key *found_key);
43 
44 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
45 				struct btrfs_extent_item *ei, u32 item_size,
46 				u64 *out_root, u8 *out_level);
47 
48 int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
49 				u64 extent_item_objectid,
50 				u64 extent_offset, int search_commit_root,
51 				iterate_extent_inodes_t *iterate, void *ctx);
52 
53 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
54 				struct btrfs_path *path,
55 				iterate_extent_inodes_t *iterate, void *ctx);
56 
57 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
58 
59 int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
60 				struct btrfs_fs_info *fs_info, u64 bytenr,
61 				u64 num_bytes, u64 seq, struct ulist **roots);
62 
63 struct btrfs_data_container *init_data_container(u32 total_bytes);
64 struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
65 					struct btrfs_path *path);
66 void free_ipath(struct inode_fs_paths *ipath);
67 
68 #endif
69