dmaengine: imx-dma: fix slow path issue in prep_dma_cyclic
[linux/fpc-iii.git] / fs / btrfs / backref.h
blob8f2e767029322d2d3d0ac2baf996c3964e999cdf
1 /*
2 * Copyright (C) 2011 STRATO. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_BACKREF__
20 #define __BTRFS_BACKREF__
22 #include <linux/btrfs.h>
23 #include "ulist.h"
24 #include "extent_io.h"
26 struct inode_fs_paths {
27 struct btrfs_path *btrfs_path;
28 struct btrfs_root *fs_root;
29 struct btrfs_data_container *fspath;
32 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
33 void *ctx);
35 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
36 struct btrfs_path *path);
38 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
39 struct btrfs_path *path, struct btrfs_key *found_key,
40 u64 *flags);
42 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
43 struct btrfs_extent_item *ei, u32 item_size,
44 u64 *out_root, u8 *out_level);
46 int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
47 u64 extent_item_objectid,
48 u64 extent_offset, int search_commit_root,
49 iterate_extent_inodes_t *iterate, void *ctx);
51 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
52 struct btrfs_path *path,
53 iterate_extent_inodes_t *iterate, void *ctx);
55 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
57 int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
58 struct btrfs_fs_info *fs_info, u64 bytenr,
59 u64 time_seq, struct ulist **roots);
60 char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
61 u32 name_len, unsigned long name_off,
62 struct extent_buffer *eb_in, u64 parent,
63 char *dest, u32 size);
65 struct btrfs_data_container *init_data_container(u32 total_bytes);
66 struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
67 struct btrfs_path *path);
68 void free_ipath(struct inode_fs_paths *ipath);
70 int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
71 u64 start_off, struct btrfs_path *path,
72 struct btrfs_inode_extref **ret_extref,
73 u64 *found_off);
75 #endif