Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / fs / ocfs2 / buffer_head_io.h
1 /* -*- mode: c; c-basic-offset: 8; -*-
2  * vim: noexpandtab sw=8 ts=8 sts=0:
3  *
4  * ocfs2_buffer_head.h
5  *
6  * Buffer cache handling functions defined
7  *
8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public
12  * License as published by the Free Software Foundation; either
13  * version 2 of the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public
21  * License along with this program; if not, write to the
22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23  * Boston, MA 021110-1307, USA.
24  */
25
26 #ifndef OCFS2_BUFFER_HEAD_IO_H
27 #define OCFS2_BUFFER_HEAD_IO_H
28
29 #include <linux/buffer_head.h>
30
31 void ocfs2_end_buffer_io_sync(struct buffer_head *bh,
32                              int uptodate);
33
34 static inline int ocfs2_read_block(struct inode        *inode,
35                                    u64                  off,
36                                    struct buffer_head **bh);
37
38 int ocfs2_write_block(struct ocfs2_super          *osb,
39                       struct buffer_head  *bh,
40                       struct inode        *inode);
41 int ocfs2_read_blocks(struct inode        *inode,
42                       u64                  block,
43                       int                  nr,
44                       struct buffer_head  *bhs[],
45                       int                  flags);
46 int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
47                            unsigned int nr, struct buffer_head *bhs[]);
48
49 int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
50                                 struct buffer_head *bh);
51
52 #define OCFS2_BH_IGNORE_CACHE      1
53 #define OCFS2_BH_READAHEAD         8
54
55 static inline int ocfs2_read_block(struct inode *inode, u64 off,
56                                    struct buffer_head **bh)
57 {
58         int status = 0;
59
60         if (bh == NULL) {
61                 printk("ocfs2: bh == NULL\n");
62                 status = -EINVAL;
63                 goto bail;
64         }
65
66         status = ocfs2_read_blocks(inode, off, 1, bh, 0);
67
68 bail:
69         return status;
70 }
71
72 #endif /* OCFS2_BUFFER_HEAD_IO_H */