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fs/freevxfs/vxfs_olt.h
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/* * 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. |
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* the initial inode list, the fileset header or the device configuration. |
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*/ struct vxfs_olt { |
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__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 */ |
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}; /* * VxFS common OLT entry (on disk). */ struct vxfs_oltcommon { |
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__fs32 olt_type; /* type of this record */ __fs32 olt_size; /* size of this record */ |
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}; /* * VxFS free OLT entry (on disk). */ struct vxfs_oltfree { |
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__fs32 olt_type; /* type of this record */ __fs32 olt_fsize; /* size of this free record */ |
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}; /* * VxFS initial-inode list (on disk). */ struct vxfs_oltilist { |
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__fs32 olt_type; /* type of this record */ __fs32 olt_size; /* size of this record */ __fs32 olt_iext[2]; /* initial inode list, replica */ |
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}; /* * Current Usage Table */ struct vxfs_oltcut { |
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__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 */ |
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}; /* * Inodes containing Superblock, Intent log and OLTs */ struct vxfs_oltsb { |
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__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 */ |
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}; /* * Inode containing device configuration + it's replica */ struct vxfs_oltdev { |
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__fs32 olt_type; /* type of this record */ __fs32 olt_size; /* size of this record */ __fs32 olt_devino[2]; /* inode of device config files */ |
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}; /* * Fileset header */ struct vxfs_oltfshead { |
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__fs32 olt_type; /* type number */ __fs32 olt_size; /* size of this record */ __fs32 olt_fsino[2]; /* inodes of fileset header */ |
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}; #endif /* _VXFS_OLT_H_ */ |