Release 4.17 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_
/*
* 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 initial inode list, the fileset header or the device configuration.
*/
struct vxfs_olt {
__fs32 olt_magic; /* magic number */
__fs32 olt_size; /* size of this entry */
__fs32 olt_checksum; /* checksum of extent */
__u32 __unused1; /* ??? */
__fs32 olt_mtime; /* time of last mod. (sec) */
__fs32 olt_mutime; /* time of last mod. (usec) */
__fs32 olt_totfree; /* free space in OLT extent */
__fs32 olt_extents[2]; /* addr of this extent, replica */
__fs32 olt_esize; /* size of this extent */
__fs32 olt_next[2]; /* addr of next extent, replica */
__fs32 olt_nsize; /* size of next extent */
__u32 __unused2; /* align to 8 byte boundary */
};
/*
* VxFS common OLT entry (on disk).
*/
struct vxfs_oltcommon {
__fs32 olt_type; /* type of this record */
__fs32 olt_size; /* size of this record */
};
/*
* VxFS free OLT entry (on disk).
*/
struct vxfs_oltfree {
__fs32 olt_type; /* type of this record */
__fs32 olt_fsize; /* size of this free record */
};
/*
* VxFS initial-inode list (on disk).
*/
struct vxfs_oltilist {
__fs32 olt_type; /* type of this record */
__fs32 olt_size; /* size of this record */
__fs32 olt_iext[2]; /* initial inode list, replica */
};
/*
* Current Usage Table
*/
struct vxfs_oltcut {
__fs32 olt_type; /* type of this record */
__fs32 olt_size; /* size of this record */
__fs32 olt_cutino; /* inode of current usage table */
__u8 __pad; /* unused, 8 byte align */
};
/*
* Inodes containing Superblock, Intent log and OLTs
*/
struct vxfs_oltsb {
__fs32 olt_type; /* type of this record */
__fs32 olt_size; /* size of this record */
__fs32 olt_sbino; /* inode of superblock file */
__u32 __unused1; /* ??? */
__fs32 olt_logino[2]; /* inode of log file,replica */
__fs32 olt_oltino[2]; /* inode of OLT, replica */
};
/*
* Inode containing device configuration + it's replica
*/
struct vxfs_oltdev {
__fs32 olt_type; /* type of this record */
__fs32 olt_size; /* size of this record */
__fs32 olt_devino[2]; /* inode of device config files */
};
/*
* Fileset header
*/
struct vxfs_oltfshead {
__fs32 olt_type; /* type number */
__fs32 olt_size; /* size of this record */
__fs32 olt_fsino[2]; /* inodes of fileset header */
};
#endif /* _VXFS_OLT_H_ */
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