sys/vfs/gnu/ext2fs/ext2mount.h

   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: src/sys/ufs/ufs/ufsmount.h,v 1.17 1999/12/29 04:55:06 peter Exp $
  35  * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2mount.h,v 1.4 2006/09/10 01:26:40 dillon Exp $
  36  */
  37
  38 #ifndef _VFS_GNU_EXT2FS_EXT2MOUNT_H_
  39 #define _VFS_GNU_EXT2FS_EXT2MOUNT_H_
  40
  41 /*
  42  * Arguments to mount UFS-based filesystems
  43  */
  44 struct ext2_args {
  45         char    *fspec;                 /* block special device to mount */
  46         struct  export_args export;     /* network export information */
  47 };
  48
  49 /*
  50  * Arguments to mount MFS
  51  */
  52 struct mfs_args {
  53         char    *fspec;                 /* name to export for statfs */
  54         struct  export_args export;     /* if exported MFSes are supported */
  55         caddr_t base;                   /* base of filesystem in memory */
  56         u_long  size;                   /* size of filesystem */
  57 };
  58
  59 #ifdef _KERNEL
  60
  61 #ifdef MALLOC_DECLARE
  62 MALLOC_DECLARE(M_EXT2MNT);
  63 #endif
  64
  65 struct buf;
  66 struct inode;
  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 ext2mount {
  75         struct  mount *um_mountp;               /* filesystem vfs structure */
  76         cdev_t  um_dev;                         /* device mounted */
  77         struct  vnode *um_devvp;                /* block device mounted vnode */
  78
  79         struct  ext2_sb_info *um_e2fs;
  80         struct  vnode *um_quotas[MAXQUOTAS];    /* pointer to quota files */
  81         struct  ucred *um_cred[MAXQUOTAS];      /* quota file access cred */
  82         u_long  um_nindir;                      /* indirect ptrs per block */
  83         u_long  um_bptrtodb;                    /* indir ptr to disk block */
  84         u_long  um_seqinc;                      /* inc between seq blocks */
  85         time_t  um_btime[MAXQUOTAS];            /* block quota time limit */
  86         time_t  um_itime[MAXQUOTAS];            /* inode quota time limit */
  87         char    um_qflags[MAXQUOTAS];           /* quota specific flags */
  88         struct  netexport um_export;            /* export information */
  89         int64_t um_savedmaxfilesize;            /* XXX - limit maxfilesize */
  90         struct malloc_type *um_malloctype;      /* The inodes malloctype */
  91         int     um_i_effnlink_valid;            /* i_effnlink valid? */
  92         int     (*um_blkatoff) (struct vnode *, off_t, char **, struct buf **);
  93         int     (*um_truncate) (struct vnode *, off_t, int, struct ucred *);
  94         int     (*um_update) (struct vnode *, int);
  95         int     (*um_valloc) (struct vnode *, int, struct ucred *, struct vnode **);
  96         int     (*um_vfree) (struct vnode *, ino_t, int);
  97 };
  98
  99 #define um_e2fsb um_e2fs->s_es
 100
 101 #define EXT2_BLKATOFF(aa, bb, cc, dd) VFSTOEXT2((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
 102 #define EXT2_TRUNCATE(aa, bb, cc, dd) VFSTOEXT2((aa)->v_mount)->um_truncate(aa, bb, cc, dd)
 103 #define EXT2_UPDATE(aa, bb) VFSTOEXT2((aa)->v_mount)->um_update(aa, bb)
 104 #define EXT2_VALLOC(aa, bb, cc, dd) VFSTOEXT2((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
 105 #define EXT2_VFREE(aa, bb, cc) VFSTOEXT2((aa)->v_mount)->um_vfree(aa, bb, cc)
 106
 107 /*
 108  * Flags describing the state of quotas.
 109  */
 110 #define QTF_OPENING     0x01                    /* Q_QUOTAON in progress */
 111 #define QTF_CLOSING     0x02                    /* Q_QUOTAOFF in progress */
 112
 113 /* Convert mount ptr to ext2mount ptr. */
 114 #define VFSTOEXT2(mp)   ((struct ext2mount *)((mp)->mnt_data))
 115
 116 /*
 117  * Macros to access filesystem parameters in the ext2mount structure.
 118  * Used by ext2_bmap.
 119  */
 120 #define MNINDIR(ump)                    ((ump)->um_nindir)
 121 #define blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
 122 #define is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)
 123 #endif /* _KERNEL */
 124
 125 #endif /* !_VFS_GNU_EXT2FS_EXT2MOUNT_H_ */