ufsmount.h revision 29725 
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 * $Id: ufsmount.h,v 1.7 1997/02/22 09:47:54 peter Exp $
35 */
36
37#ifndef _UFS_UFS_UFSMOUNT_H_
38#define _UFS_UFS_UFSMOUNT_H_
39
40/*
41 * Arguments to mount UFS-based filesystems
42 */
43struct ufs_args {
44	char	*fspec;			/* block special device to mount */
45	struct	export_args export;	/* network export information */
46};
47
48/*
49 * Arguments to mount MFS
50 */
51struct mfs_args {
52	char	*fspec;			/* name to export for statfs */
53	struct	export_args export;	/* if exported MFSes are supported */
54	caddr_t	base;			/* base of file system in memory */
55	u_long	size;			/* size of file system */
56};
57
58#ifdef KERNEL
59struct buf;
60struct inode;
61struct nameidata;
62struct timeval;
63struct ucred;
64struct uio;
65struct vnode;
66struct netexport;
67
68/* This structure describes the UFS specific mount structure data. */
69struct ufsmount {
70	struct	mount *um_mountp;		/* filesystem vfs structure */
71	dev_t	um_dev;				/* device mounted */
72	struct	vnode *um_devvp;		/* block device mounted vnode */
73
74	union {					/* pointer to superblock */
75		struct	lfs *lfs;		/* LFS */
76		struct	fs *fs;			/* FFS */
77		struct	ext2_sb_info *e2fs;	/* EXT2FS */
78	} ufsmount_u;
79#define	um_fs	ufsmount_u.fs
80#define	um_lfs	ufsmount_u.lfs
81#define	um_e2fs	ufsmount_u.e2fs
82#define um_e2fsb ufsmount_u.e2fs->s_es
83
84	struct	vnode *um_quotas[MAXQUOTAS];	/* pointer to quota files */
85	struct	ucred *um_cred[MAXQUOTAS];	/* quota file access cred */
86	u_long	um_nindir;			/* indirect ptrs per block */
87	u_long	um_bptrtodb;			/* indir ptr to disk block */
88	u_long	um_seqinc;			/* inc between seq blocks */
89	time_t	um_btime[MAXQUOTAS];		/* block quota time limit */
90	time_t	um_itime[MAXQUOTAS];		/* inode quota time limit */
91	char	um_qflags[MAXQUOTAS];		/* quota specific flags */
92	struct	netexport um_export;		/* export information */
93	int64_t	um_savedmaxfilesize;		/* XXX - limit maxfilesize */
94};
95
96/*
97 * Flags describing the state of quotas.
98 */
99#define	QTF_OPENING	0x01			/* Q_QUOTAON in progress */
100#define	QTF_CLOSING	0x02			/* Q_QUOTAOFF in progress */
101
102/* Convert mount ptr to ufsmount ptr. */
103#define VFSTOUFS(mp)	((struct ufsmount *)((mp)->mnt_data))
104
105/*
106 * Macros to access file system parameters in the ufsmount structure.
107 * Used by ufs_bmap.
108 */
109#define MNINDIR(ump)			((ump)->um_nindir)
110#define	blkptrtodb(ump, b)		((b) << (ump)->um_bptrtodb)
111#define	is_sequential(ump, a, b)	((b) == (a) + ump->um_seqinc)
112#endif /* KERNEL */
113
114#endif
115