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