ufsmount.h revision 2177 
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	8.2 (Berkeley) 1/12/94
34 * $Id: ufsmount.h,v 1.2 1994/08/02 07:55:04 davidg Exp $
35 */
36
37#ifndef _UFS_UFS_UFSMOUNT_H_
38#define _UFS_UFS_UFSMOUNT_H_
39
40struct buf;
41struct inode;
42struct nameidata;
43struct timeval;
44struct ucred;
45struct uio;
46struct vnode;
47struct netexport;
48
49/* This structure describes the UFS specific mount structure data. */
50struct ufsmount {
51	struct	mount *um_mountp;		/* filesystem vfs structure */
52	dev_t	um_dev;				/* device mounted */
53	struct	vnode *um_devvp;		/* block device mounted vnode */
54	union {					/* pointer to superblock */
55		struct	lfs *lfs;		/* LFS */
56		struct	fs *fs;			/* FFS */
57	} ufsmount_u;
58#define	um_fs	ufsmount_u.fs
59#define	um_lfs	ufsmount_u.lfs
60	struct	vnode *um_quotas[MAXQUOTAS];	/* pointer to quota files */
61	struct	ucred *um_cred[MAXQUOTAS];	/* quota file access cred */
62	u_long	um_nindir;			/* indirect ptrs per block */
63	u_long	um_bptrtodb;			/* indir ptr to disk block */
64	u_long	um_seqinc;			/* inc between seq blocks */
65	time_t	um_btime[MAXQUOTAS];		/* block quota time limit */
66	time_t	um_itime[MAXQUOTAS];		/* inode quota time limit */
67	char	um_qflags[MAXQUOTAS];		/* quota specific flags */
68	struct	netexport um_export;		/* export information */
69};
70/*
71 * Flags describing the state of quotas.
72 */
73#define	QTF_OPENING	0x01			/* Q_QUOTAON in progress */
74#define	QTF_CLOSING	0x02			/* Q_QUOTAOFF in progress */
75
76/* Convert mount ptr to ufsmount ptr. */
77#define VFSTOUFS(mp)	((struct ufsmount *)((mp)->mnt_data))
78
79/*
80 * Macros to access file system parameters in the ufsmount structure.
81 * Used by ufs_bmap.
82 */
83#define	blkptrtodb(ump, b)	((b) << (ump)->um_bptrtodb)
84#define	is_sequential(ump, a, b) ((b) == (a) + ump->um_seqinc)
85#define MNINDIR(ump)	((ump)->um_nindir)
86
87#endif
88