FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/ufsmount.h

     /*      $NetBSD: ufsmount.h,v 1.15 2004/01/09 19:10:22 dbj 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  8.6 (Berkeley) 3/30/95
     */
    
    #ifndef _UFS_UFS_UFSMOUNT_H_
    #define _UFS_UFS_UFSMOUNT_H_
    
    /*
     * Arguments to mount UFS-based filesystems
     */
    struct ufs_args {
            char    *fspec;                 /* block special device to mount */
            struct  export_args export;     /* network export information */
    };
    
    /*
     * Arguments to mount MFS
     */
    struct mfs_args {
            char    *fspec;                 /* name to export for statfs */
            struct  export_args export;     /* if exported MFSes are supported */
            caddr_t base;                   /* base of file system in memory */
            u_long  size;                   /* size of file system */
    };
    
    #ifdef _KERNEL
    
    #if defined(_KERNEL_OPT)
    #include "opt_ffs.h"
    #endif
    
    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;
            u_int32_t um_flags;                     /* UFS-specific flags - see below */
            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_lognindir;                   /* log2 of um_nindir */
            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 */
            void    *um_oldfscompat;                        /* save 4.2 rotbl */
    };
    
   /* UFS-specific flags */
   #define UFS_NEEDSWAP    0x01    /* filesystem metadata need byte-swapping */
   #define UFS_ISAPPLEUFS  0x02    /* filesystem is Apple UFS */
   
   /*
    * Filesystem types
    */
   #define UFS1  1
   #define UFS2  2
   
   
   /*
    * 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))
   
   #ifdef APPLE_UFS
   #define UFS_MPISAPPLEUFS(mp)    (VFSTOUFS(mp)->um_flags & UFS_ISAPPLEUFS)
   #else
   #define UFS_MPISAPPLEUFS(mp)    (0)
   #endif
   
   /*
    * 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)
   #endif /* _KERNEL */
   
   #endif /* !_UFS_UFS_UFSMOUNT_H_ */

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