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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott1e69dd02006-06-19 08:39:53 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_RW_H__
19#define __XFS_RW_H__
20
21struct xfs_buf;
22struct xfs_inode;
23struct xfs_mount;
24
25/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * 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 */
Nathan Scotta844f452005-11-02 14:38:42 +110031static inline xfs_daddr_t
32xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
33{
Eric Sandeen71ddabb2007-11-23 16:29:42 +110034 return (XFS_IS_REALTIME_INODE(ip) ? \
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
Nathan Scotta844f452005-11-02 14:38:42 +110036 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
37}
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39/*
David Chinner92dfe8d2007-05-24 15:22:19 +100040 * Flags for xfs_free_eofblocks
41 */
42#define XFS_FREE_EOF_LOCK (1<<0)
43#define XFS_FREE_EOF_NOLOCK (1<<1)
44
David Chinner957d0eb2007-06-18 16:50:37 +100045
46/*
47 * helper function to extract extent size hint from inode
48 */
49STATIC_INLINE xfs_extlen_t
50xfs_get_extsz_hint(
51 xfs_inode_t *ip)
52{
53 xfs_extlen_t extsz;
54
Eric Sandeen71ddabb2007-11-23 16:29:42 +110055 if (unlikely(XFS_IS_REALTIME_INODE(ip))) {
David Chinner957d0eb2007-06-18 16:50:37 +100056 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
57 ? ip->i_d.di_extsize
58 : ip->i_mount->m_sb.sb_rextsize;
59 ASSERT(extsz);
60 } else {
61 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
62 ? ip->i_d.di_extsize : 0;
63 }
64 return extsz;
65}
66
David Chinner92dfe8d2007-05-24 15:22:19 +100067/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * Prototypes for functions in xfs_rw.c.
69 */
Nathan Scotta844f452005-11-02 14:38:42 +110070extern int xfs_write_clear_setuid(struct xfs_inode *ip);
71extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
72extern int xfs_bioerror(struct xfs_buf *bp);
73extern int xfs_bioerror_relse(struct xfs_buf *bp);
74extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
75 xfs_daddr_t blkno, int len, uint flags,
76 struct xfs_buf **bpp);
77extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
78 xfs_buf_t *bp, xfs_daddr_t blkno);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#endif /* __XFS_RW_H__ */