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backref.h
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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 #include "extent_io.h"
25 
26 #define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0)
27 
32 };
33 
35  void *ctx);
36 
37 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
38  struct btrfs_path *path);
39 
40 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
41  struct btrfs_path *path, struct btrfs_key *found_key,
42  u64 *flags);
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 
49  u64 extent_item_objectid,
50  u64 extent_offset, int search_commit_root,
51  iterate_extent_inodes_t *iterate, void *ctx);
52 
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 
61  u64 time_seq, struct ulist **roots);
62 char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
63  struct btrfs_inode_ref *iref, struct extent_buffer *eb,
64  u64 parent, char *dest, u32 size);
65 char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
66  u32 name_len, unsigned long name_off,
67  struct extent_buffer *eb_in, u64 parent,
68  char *dest, u32 size);
69 
72  struct btrfs_path *path);
73 void free_ipath(struct inode_fs_paths *ipath);
74 
75 int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
76  u64 start_off, struct btrfs_path *path,
77  struct btrfs_inode_extref **ret_extref,
78  u64 *found_off);
79 
80 #endif