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Annotation of sys/ufs/ufs/ufsmount.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: ufsmount.h,v 1.12 2006/10/29 00:53:37 thib Exp $      */
                      2: /*     $NetBSD: ufsmount.h,v 1.4 1994/12/21 20:00:23 mycroft Exp $     */
                      3:
                      4: /*
                      5:  * Copyright (c) 1982, 1986, 1989, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the University nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  *
                     32:  *     @(#)ufsmount.h  8.4 (Berkeley) 10/27/94
                     33:  */
                     34:
                     35: struct buf;
                     36: struct inode;
                     37: struct nameidata;
                     38: struct timeval;
                     39: struct ucred;
                     40: struct uio;
                     41: struct vnode;
                     42: struct netexport;
                     43:
                     44: /* This structure describes the UFS specific mount structure data. */
                     45: struct ufsmount {
                     46:        struct  mount *um_mountp;               /* filesystem vfs structure */
                     47:        dev_t   um_dev;                         /* device mounted */
                     48:        struct  vnode *um_devvp;                /* block device mounted vnode */
                     49:        u_long  um_fstype;                      /* type of file system */
                     50:
                     51:        union {                                 /* pointer to superblock */
                     52:                struct  fs *fs;                 /* FFS */
                     53:                struct  m_ext2fs *e2fs;         /* EXT2FS */
                     54:        } ufsmount_u;
                     55: #define        um_fs           ufsmount_u.fs
                     56: #define        um_e2fs         ufsmount_u.e2fs
                     57: #define        um_e2fsb        ufsmount_u.e2fs->s_es
                     58:
                     59:        struct  vnode *um_quotas[MAXQUOTAS];    /* pointer to quota files */
                     60:        struct  ucred *um_cred[MAXQUOTAS];      /* quota file access cred */
                     61:        u_long  um_nindir;                      /* indirect ptrs per block */
                     62:        u_long  um_bptrtodb;                    /* indir ptr to disk block */
                     63:        u_long  um_seqinc;                      /* inc between seq blocks */
                     64:        time_t  um_btime[MAXQUOTAS];            /* block quota time limit */
                     65:        time_t  um_itime[MAXQUOTAS];            /* inode quota time limit */
                     66:        char    um_qflags[MAXQUOTAS];           /* quota specific flags */
                     67:        struct  netexport um_export;            /* export information */
                     68:        u_int64_t um_savedmaxfilesize;          /* XXX - limit maxfilesize */
                     69: };
                     70:
                     71: /*
                     72:  * Filesystem types
                     73:  */
                     74: #define        UM_UFS1 1
                     75: #define        UM_UFS2 2
                     76: #define        UM_EXT2FS       3
                     77:
                     78: /*
                     79:  * Flags describing the state of quotas.
                     80:  */
                     81: #define        QTF_OPENING     0x01                    /* Q_QUOTAON in progress */
                     82: #define        QTF_CLOSING     0x02                    /* Q_QUOTAOFF in progress */
                     83:
                     84: /* Convert mount ptr to ufsmount ptr. */
                     85: #define VFSTOUFS(mp)   ((struct ufsmount *)((mp)->mnt_data))
                     86:
                     87: /*
                     88:  * Macros to access file system parameters in the ufsmount structure.
                     89:  * Used by ufs_bmap.
                     90:  */
                     91: #define MNINDIR(ump)                   ((ump)->um_nindir)
                     92: #define        blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
                     93: #define        is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)