1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #ifndef __XFS_RW_H__
19 #define __XFS_RW_H__
20
21 struct xfs_buf;
22 struct xfs_inode;
23 struct xfs_mount;
24
25 /*
26 * Convert the given file system block to a disk block.
27 * We have to treat it differently based on whether the
28 * file is a real time file or not, because the bmap code
29 * does.
30 */
31 static inline xfs_daddr_t
xfs_fsb_to_db(struct xfs_inode * ip,xfs_fsblock_t fsb)32 xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
33 {
34 return (XFS_IS_REALTIME_INODE(ip) ? \
35 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
36 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
37 }
38
39 /*
40 * Prototypes for functions in xfs_rw.c.
41 */
42 extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
43 xfs_daddr_t blkno, int len, uint flags,
44 struct xfs_buf **bpp);
45 extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
46 xfs_buf_t *bp, xfs_daddr_t blkno);
47 extern xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
48
49 #endif /* __XFS_RW_H__ */
50