tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
21struct xfs_buf;
22struct xfs_inode;
23struct 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#define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb)
32static inline xfs_daddr_t
33xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
34{
35 return (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \
36 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
37 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
38}
39#define XFS_FSB_TO_DB_IO(io,fsb) xfs_fsb_to_db_io(io,fsb)
40static inline xfs_daddr_t
41xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb)
42{
43 return (((io)->io_flags & XFS_IOCORE_RT) ? \
44 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
45 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)));
46}
47
48/*
49 * Flags for xfs_free_eofblocks
50 */
51#define XFS_FREE_EOF_LOCK (1<<0)
52#define XFS_FREE_EOF_NOLOCK (1<<1)
53
54
55/*
56 * helper function to extract extent size hint from inode
57 */
58STATIC_INLINE xfs_extlen_t
59xfs_get_extsz_hint(
60 xfs_inode_t *ip)
61{
62 xfs_extlen_t extsz;
63
64 if (unlikely(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
65 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
66 ? ip->i_d.di_extsize
67 : ip->i_mount->m_sb.sb_rextsize;
68 ASSERT(extsz);
69 } else {
70 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
71 ? ip->i_d.di_extsize : 0;
72 }
73 return extsz;
74}
75
76/*
77 * Prototypes for functions in xfs_rw.c.
78 */
79extern int xfs_write_clear_setuid(struct xfs_inode *ip);
80extern int xfs_write_sync_logforce(struct xfs_mount *mp, struct xfs_inode *ip);
81extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
82extern int xfs_bioerror(struct xfs_buf *bp);
83extern int xfs_bioerror_relse(struct xfs_buf *bp);
84extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
85 xfs_daddr_t blkno, int len, uint flags,
86 struct xfs_buf **bpp);
87extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
88 xfs_buf_t *bp, xfs_daddr_t blkno);
89
90/*
91 * Prototypes for functions in xfs_vnodeops.c.
92 */
93extern int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
94 int flags);
95
96#endif /* __XFS_RW_H__ */