File: [local] / sys / ufs / ufs / ufsmount.h (download)
Revision 1.1, Tue Mar 4 16:16:20 2008 UTC (16 years, 3 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: ufsmount.h,v 1.12 2006/10/29 00:53:37 thib Exp $ */
/* $NetBSD: ufsmount.h,v 1.4 1994/12/21 20:00:23 mycroft Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ufsmount.h 8.4 (Berkeley) 10/27/94
*/
struct buf;
struct inode;
struct nameidata;
struct timeval;
struct ucred;
struct uio;
struct vnode;
struct netexport;
/* This structure describes the UFS specific mount structure data. */
struct ufsmount {
struct mount *um_mountp; /* filesystem vfs structure */
dev_t um_dev; /* device mounted */
struct vnode *um_devvp; /* block device mounted vnode */
u_long um_fstype; /* type of file system */
union { /* pointer to superblock */
struct fs *fs; /* FFS */
struct m_ext2fs *e2fs; /* EXT2FS */
} ufsmount_u;
#define um_fs ufsmount_u.fs
#define um_e2fs ufsmount_u.e2fs
#define um_e2fsb ufsmount_u.e2fs->s_es
struct vnode *um_quotas[MAXQUOTAS]; /* pointer to quota files */
struct ucred *um_cred[MAXQUOTAS]; /* quota file access cred */
u_long um_nindir; /* indirect ptrs per block */
u_long um_bptrtodb; /* indir ptr to disk block */
u_long um_seqinc; /* inc between seq blocks */
time_t um_btime[MAXQUOTAS]; /* block quota time limit */
time_t um_itime[MAXQUOTAS]; /* inode quota time limit */
char um_qflags[MAXQUOTAS]; /* quota specific flags */
struct netexport um_export; /* export information */
u_int64_t um_savedmaxfilesize; /* XXX - limit maxfilesize */
};
/*
* Filesystem types
*/
#define UM_UFS1 1
#define UM_UFS2 2
#define UM_EXT2FS 3
/*
* Flags describing the state of quotas.
*/
#define QTF_OPENING 0x01 /* Q_QUOTAON in progress */
#define QTF_CLOSING 0x02 /* Q_QUOTAOFF in progress */
/* Convert mount ptr to ufsmount ptr. */
#define VFSTOUFS(mp) ((struct ufsmount *)((mp)->mnt_data))
/*
* Macros to access file system parameters in the ufsmount structure.
* Used by ufs_bmap.
*/
#define MNINDIR(ump) ((ump)->um_nindir)
#define blkptrtodb(ump, b) ((b) << (ump)->um_bptrtodb)
#define is_sequential(ump, a, b) ((b) == (a) + ump->um_seqinc)