1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)ufsmount.h 8.6 (Berkeley) 3/30/95
34 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_mount.h 96596 2002-05-14 17:14:01Z iedowse $
35 */
36
37#ifndef _SYS_GNU_EXT2FS_EXT2_MOUNT_H_
38#define _SYS_GNU_EXT2FS_EXT2_MOUNT_H_
39
40/*
41 * Arguments to mount ext2fs filesystems
42 */
43struct ext2_args {
44 char *fspec; /* block special device to mount */
45 struct export_args export; /* network export information */
46};
47
48#ifdef _KERNEL
49
50#ifdef MALLOC_DECLARE
51MALLOC_DECLARE(M_EXT2NODE);
52#endif
53
54struct vnode;
55
56/* This structure describes the ext2fs specific mount structure data. */
57struct ext2mount {
58 struct mount *um_mountp; /* filesystem vfs structure */
59 dev_t um_dev; /* device mounted */
60 struct vnode *um_devvp; /* block device mounted vnode */
61
62 struct ext2_sb_info *um_e2fs; /* EXT2FS */
63#define em_e2fsb um_e2fs->s_es
64
65 u_long um_nindir; /* indirect ptrs per block */
66 u_long um_bptrtodb; /* indir ptr to disk block */
67 u_long um_seqinc; /* inc between seq blocks */
68};
69
70/* Convert mount ptr to ext2fsmount ptr. */
71#define VFSTOEXT2(mp) ((struct ext2mount *)((mp)->mnt_data))
72
73/*
74 * Macros to access file system parameters in the ufsmount structure.
75 * Used by ufs_bmap.
76 */
77#define MNINDIR(ump) ((ump)->um_nindir)
78#define blkptrtodb(ump, b) ((b) << (ump)->um_bptrtodb)
79#define is_sequential(ump, a, b) ((b) == (a) + ump->um_seqinc)
80#endif /* _KERNEL */
81
82#endif