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ufsmount.h

/*    $OpenBSD: ufsmount.h,v 1.11 2005/07/03 20:14:03 drahn 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      lfs *lfs;         /* LFS */
            struct  m_ext2fs *e2fs;       /* EXT2FS */
      } ufsmount_u;
#define     um_fs ufsmount_u.fs
#define     um_lfs      ufsmount_u.lfs
#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
#define     UM_LFS      4

/*
 * 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)

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