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 * Flags for xfs_free_eofblocks
41 */
42 #define XFS_FREE_EOF_LOCK (1<<0)
43 #define XFS_FREE_EOF_NOLOCK (1<<1)
44
45
46 /*
47 * helper function to extract extent size hint from inode
48 */
49 STATIC_INLINE xfs_extlen_t
xfs_get_extsz_hint(xfs_inode_t * ip)50 xfs_get_extsz_hint(
51 xfs_inode_t *ip)
52 {
53 xfs_extlen_t extsz;
54
55 if (unlikely(XFS_IS_REALTIME_INODE(ip))) {
56 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
67 /*
68 * Prototypes for functions in xfs_rw.c.
69 */
70 extern int xfs_write_clear_setuid(struct xfs_inode *ip);
71 extern int xfs_write_sync_logforce(struct xfs_mount *mp, struct xfs_inode *ip);
72 extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
73 extern int xfs_bioerror(struct xfs_buf *bp);
74 extern int xfs_bioerror_relse(struct xfs_buf *bp);
75 extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
76 xfs_daddr_t blkno, int len, uint flags,
77 struct xfs_buf **bpp);
78 extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
79 xfs_buf_t *bp, xfs_daddr_t blkno);
80
81 /*
82 * Prototypes for functions in xfs_vnodeops.c.
83 */
84 extern int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
85 int flags);
86
87 #endif /* __XFS_RW_H__ */
88