FreeBSD/Linux Kernel Cross Reference
sys/fs/freevxfs/vxfs_olt.h

     /*
      * Copyright (c) 2000-2001 Christoph Hellwig.
      * 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,
     *    without modification.
     * 2. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * Alternatively, this software may be distributed under the terms of the
     * GNU General Public License ("GPL").
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     */
    #ifndef _VXFS_OLT_H_
    #define _VXFS_OLT_H_
    
    #ident "$Id: vxfs_olt.h,v 1.5 2001/04/25 18:11:23 hch Exp hch $"
    
    /*
     * Veritas filesystem driver - Object Location Table data structures.
     *
     * This file contains definitions for the Object Location Table used
     * by the Veritas Filesystem version 2 and newer.
     */
    
    
    /*
     * OLT magic number (vxfs_olt->olt_magic).
     */
    #define VXFS_OLT_MAGIC          0xa504FCF5
    
    /*
     * VxFS OLT entry types.
     */
    enum {
            VXFS_OLT_FREE   = 1,
            VXFS_OLT_FSHEAD = 2,
            VXFS_OLT_CUT    = 3,
            VXFS_OLT_ILIST  = 4,
            VXFS_OLT_DEV    = 5,
            VXFS_OLT_SB     = 6
    };
    
    /*
     * VxFS OLT header.
     *
     * The Object Location Table header is placed at the beginning of each
     * OLT extent.  It is used to fing certain filesystem-wide metadata, e.g.
     * the inital inode list, the fileset header or the device configuration.
     */
    struct vxfs_olt {
            u_int32_t       olt_magic;      /* magic number                 */
            u_int32_t       olt_size;       /* size of this entry           */
            u_int32_t       olt_checksum;   /* checksum of extent           */
            u_int32_t       __unused1;      /* ???                          */
            u_int32_t       olt_mtime;      /* time of last mod. (sec)      */
            u_int32_t       olt_mutime;     /* time of last mod. (usec)     */
            u_int32_t       olt_totfree;    /* free space in OLT extent     */
            vx_daddr_t      olt_extents[2]; /* addr of this extent, replica */
            u_int32_t       olt_esize;      /* size of this extent          */
            vx_daddr_t      olt_next[2];    /* addr of next extent, replica */
            u_int32_t       olt_nsize;      /* size of next extent          */
            u_int32_t       __unused2;      /* align to 8 byte boundary     */
    };
    
    /*
     * VxFS common OLT entry (on disk).
     */
    struct vxfs_oltcommon {
            u_int32_t       olt_type;       /* type of this record          */
            u_int32_t       olt_size;       /* size of this record          */
    };
    
    /*
     * VxFS free OLT entry (on disk).
     */
    struct vxfs_oltfree {
            u_int32_t       olt_type;       /* type of this record          */
            u_int32_t       olt_fsize;      /* size of this free record     */
    };
    
    /*
     * VxFS initial-inode list (on disk).
    */
   struct vxfs_oltilist {
           u_int32_t       olt_type;       /* type of this record          */
           u_int32_t       olt_size;       /* size of this record          */
           vx_ino_t        olt_iext[2];    /* initial inode list, replica  */
   };
   
   /*
    * Current Usage Table 
    */
   struct vxfs_oltcut {
           u_int32_t       olt_type;       /* type of this record          */
           u_int32_t       olt_size;       /* size of this record          */
           vx_ino_t        olt_cutino;     /* inode of current usage table */
           u_int32_t       __pad;          /* unused, 8 byte align         */
   };
   
   /*
    * Inodes containing Superblock, Intent log and OLTs 
    */
   struct vxfs_oltsb {
           u_int32_t       olt_type;       /* type of this record          */
           u_int32_t       olt_size;       /* size of this record          */
           vx_ino_t        olt_sbino;      /* inode of superblock file     */
           u_int32_t       __unused1;      /* ???                          */
           vx_ino_t        olt_logino[2];  /* inode of log file,replica    */
           vx_ino_t        olt_oltino[2];  /* inode of OLT, replica        */
   };
   
   /*
    * Inode containing device configuration + it's replica 
    */
   struct vxfs_oltdev {
           u_int32_t       olt_type;       /* type of this record          */
           u_int32_t       olt_size;       /* size of this record          */
           vx_ino_t        olt_devino[2];  /* inode of device config files */
   };
   
   /*
    * Fileset header 
    */
   struct vxfs_oltfshead {
           u_int32_t       olt_type;       /* type number                  */
           u_int32_t       olt_size;       /* size of this record          */
           vx_ino_t        olt_fsino[2];   /* inodes of fileset header     */
   };
   
   #endif /* _VXFS_OLT_H_ */

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