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marcus.erl |
/*
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* Copyright (c) 2000-2001 Christoph Hellwig.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL").
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef _VXFS_OLT_H_
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#define _VXFS_OLT_H_
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/*
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* Veritas filesystem driver - Object Location Table data structures.
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*
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* This file contains definitions for the Object Location Table used
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* by the Veritas Filesystem version 2 and newer.
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*/
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/*
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* OLT magic number (vxfs_olt->olt_magic).
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*/
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#define VXFS_OLT_MAGIC 0xa504FCF5
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/*
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* VxFS OLT entry types.
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*/
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enum {
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VXFS_OLT_FREE = 1,
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VXFS_OLT_FSHEAD = 2,
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VXFS_OLT_CUT = 3,
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VXFS_OLT_ILIST = 4,
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VXFS_OLT_DEV = 5,
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VXFS_OLT_SB = 6
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};
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/*
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* VxFS OLT header.
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*
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* The Object Location Table header is placed at the beginning of each
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* OLT extent. It is used to fing certain filesystem-wide metadata, e.g.
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* the inital inode list, the fileset header or the device configuration.
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*/
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struct vxfs_olt {
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u_int32_t olt_magic; /* magic number */
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u_int32_t olt_size; /* size of this entry */
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u_int32_t olt_checksum; /* checksum of extent */
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u_int32_t __unused1; /* ??? */
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u_int32_t olt_mtime; /* time of last mod. (sec) */
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u_int32_t olt_mutime; /* time of last mod. (usec) */
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u_int32_t olt_totfree; /* free space in OLT extent */
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vx_daddr_t olt_extents[2]; /* addr of this extent, replica */
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u_int32_t olt_esize; /* size of this extent */
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vx_daddr_t olt_next[2]; /* addr of next extent, replica */
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u_int32_t olt_nsize; /* size of next extent */
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u_int32_t __unused2; /* align to 8 byte boundary */
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};
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/*
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* VxFS common OLT entry (on disk).
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*/
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struct vxfs_oltcommon {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_size; /* size of this record */
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};
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/*
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* VxFS free OLT entry (on disk).
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*/
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struct vxfs_oltfree {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_fsize; /* size of this free record */
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};
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/*
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* VxFS initial-inode list (on disk).
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*/
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struct vxfs_oltilist {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_size; /* size of this record */
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vx_ino_t olt_iext[2]; /* initial inode list, replica */
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};
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/*
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* Current Usage Table
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*/
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struct vxfs_oltcut {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_size; /* size of this record */
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vx_ino_t olt_cutino; /* inode of current usage table */
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u_int32_t __pad; /* unused, 8 byte align */
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};
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/*
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* Inodes containing Superblock, Intent log and OLTs
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*/
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struct vxfs_oltsb {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_size; /* size of this record */
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vx_ino_t olt_sbino; /* inode of superblock file */
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u_int32_t __unused1; /* ??? */
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vx_ino_t olt_logino[2]; /* inode of log file,replica */
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vx_ino_t olt_oltino[2]; /* inode of OLT, replica */
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};
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/*
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* Inode containing device configuration + it's replica
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*/
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struct vxfs_oltdev {
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u_int32_t olt_type; /* type of this record */
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u_int32_t olt_size; /* size of this record */
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vx_ino_t olt_devino[2]; /* inode of device config files */
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};
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/*
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* Fileset header
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*/
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struct vxfs_oltfshead {
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u_int32_t olt_type; /* type number */
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u_int32_t olt_size; /* size of this record */
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vx_ino_t olt_fsino[2]; /* inodes of fileset header */
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};
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#endif /* _VXFS_OLT_H_ */
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