The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    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  * $FreeBSD$
   35  */
   36 
   37 #ifndef _UFS_UFS_UFSMOUNT_H_
   38 #define _UFS_UFS_UFSMOUNT_H_
   39 
   40 /*
   41  * Arguments to mount UFS-based filesystems
   42  */
   43 struct 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  */
   51 struct 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
   59 
   60 #ifdef MALLOC_DECLARE
   61 MALLOC_DECLARE(M_UFSMNT);
   62 #endif
   63 
   64 struct buf;
   65 struct inode;
   66 struct nameidata;
   67 struct timeval;
   68 struct ucred;
   69 struct uio;
   70 struct vnode;
   71 struct netexport;
   72 
   73 /* This structure describes the UFS specific mount structure data. */
   74 struct ufsmount {
   75         struct  mount *um_mountp;               /* filesystem vfs structure */
   76         dev_t   um_dev;                         /* device mounted */
   77         struct  vnode *um_devvp;                /* block device mounted vnode */
   78 
   79         union {                                 /* pointer to superblock */
   80                 struct  fs *fs;                 /* FFS */
   81                 struct  ext2_sb_info *e2fs;     /* EXT2FS */
   82         } ufsmount_u;
   83 #define um_fs   ufsmount_u.fs
   84 #define um_e2fs ufsmount_u.e2fs
   85 #define um_e2fsb ufsmount_u.e2fs->s_es
   86 
   87         struct  vnode *um_quotas[MAXQUOTAS];    /* pointer to quota files */
   88         struct  ucred *um_cred[MAXQUOTAS];      /* quota file access cred */
   89         u_long  um_nindir;                      /* indirect ptrs per block */
   90         u_long  um_bptrtodb;                    /* indir ptr to disk block */
   91         u_long  um_seqinc;                      /* inc between seq blocks */
   92         time_t  um_btime[MAXQUOTAS];            /* block quota time limit */
   93         time_t  um_itime[MAXQUOTAS];            /* inode quota time limit */
   94         char    um_qflags[MAXQUOTAS];           /* quota specific flags */
   95         struct  netexport um_export;            /* export information */
   96         int64_t um_savedmaxfilesize;            /* XXX - limit maxfilesize */
   97         struct malloc_type *um_malloctype;      /* The inodes malloctype */
   98         int     um_i_effnlink_valid;            /* i_effnlink valid? */
   99         int     (*um_blkatoff) __P((struct vnode *, off_t, char **, struct buf **));
  100         int     (*um_truncate) __P((struct vnode *, off_t, int, struct ucred *, struct proc *));
  101         int     (*um_update) __P((struct vnode *, int));
  102         int     (*um_valloc) __P((struct vnode *, int, struct ucred *, struct vnode **));
  103         int     (*um_vfree) __P((struct vnode *, ino_t, int));
  104 };
  105 
  106 #define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
  107 #define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
  108 #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
  109 #define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
  110 #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
  111 
  112 /*
  113  * Flags describing the state of quotas.
  114  */
  115 #define QTF_OPENING     0x01                    /* Q_QUOTAON in progress */
  116 #define QTF_CLOSING     0x02                    /* Q_QUOTAOFF in progress */
  117 
  118 /* Convert mount ptr to ufsmount ptr. */
  119 #define VFSTOUFS(mp)    ((struct ufsmount *)((mp)->mnt_data))
  120 
  121 /*
  122  * Macros to access file system parameters in the ufsmount structure.
  123  * Used by ufs_bmap.
  124  */
  125 #define MNINDIR(ump)                    ((ump)->um_nindir)
  126 #define blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
  127 #define is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)
  128 #endif /* KERNEL */
  129 
  130 #endif

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