ia64/linux-2.6.18-xen.hg

view fs/ocfs2/buffer_head_io.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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 */
26 #ifndef OCFS2_BUFFER_HEAD_IO_H
27 #define OCFS2_BUFFER_HEAD_IO_H
29 #include <linux/buffer_head.h>
31 void ocfs2_end_buffer_io_sync(struct buffer_head *bh,
32 int uptodate);
34 static inline int ocfs2_read_block(struct ocfs2_super *osb,
35 u64 off,
36 struct buffer_head **bh,
37 int flags,
38 struct inode *inode);
40 int ocfs2_write_block(struct ocfs2_super *osb,
41 struct buffer_head *bh,
42 struct inode *inode);
43 int ocfs2_read_blocks(struct ocfs2_super *osb,
44 u64 block,
45 int nr,
46 struct buffer_head *bhs[],
47 int flags,
48 struct inode *inode);
51 #define OCFS2_BH_CACHED 1
52 #define OCFS2_BH_READAHEAD 8 /* use this to pass READA down to submit_bh */
54 static inline int ocfs2_read_block(struct ocfs2_super * osb, u64 off,
55 struct buffer_head **bh, int flags,
56 struct inode *inode)
57 {
58 int status = 0;
60 if (bh == NULL) {
61 printk("ocfs2: bh == NULL\n");
62 status = -EINVAL;
63 goto bail;
64 }
66 status = ocfs2_read_blocks(osb, off, 1, bh,
67 flags, inode);
69 bail:
70 return status;
71 }
73 #endif /* OCFS2_BUFFER_HEAD_IO_H */