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145 lines
4.3 KiB
145 lines
4.3 KiB
/* |
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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 initial inode list, the fileset header or the device configuration. |
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*/ |
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struct vxfs_olt { |
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__fs32 olt_magic; /* magic number */ |
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__fs32 olt_size; /* size of this entry */ |
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__fs32 olt_checksum; /* checksum of extent */ |
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__u32 __unused1; /* ??? */ |
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__fs32 olt_mtime; /* time of last mod. (sec) */ |
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__fs32 olt_mutime; /* time of last mod. (usec) */ |
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__fs32 olt_totfree; /* free space in OLT extent */ |
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__fs32 olt_extents[2]; /* addr of this extent, replica */ |
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__fs32 olt_esize; /* size of this extent */ |
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__fs32 olt_next[2]; /* addr of next extent, replica */ |
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__fs32 olt_nsize; /* size of next extent */ |
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__u32 __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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__fs32 olt_type; /* type of this record */ |
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__fs32 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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__fs32 olt_type; /* type of this record */ |
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__fs32 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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__fs32 olt_type; /* type of this record */ |
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__fs32 olt_size; /* size of this record */ |
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__fs32 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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__fs32 olt_type; /* type of this record */ |
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__fs32 olt_size; /* size of this record */ |
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__fs32 olt_cutino; /* inode of current usage table */ |
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__u8 __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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__fs32 olt_type; /* type of this record */ |
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__fs32 olt_size; /* size of this record */ |
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__fs32 olt_sbino; /* inode of superblock file */ |
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__u32 __unused1; /* ??? */ |
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__fs32 olt_logino[2]; /* inode of log file,replica */ |
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__fs32 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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__fs32 olt_type; /* type of this record */ |
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__fs32 olt_size; /* size of this record */ |
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__fs32 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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__fs32 olt_type; /* type number */ |
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__fs32 olt_size; /* size of this record */ |
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__fs32 olt_fsino[2]; /* inodes of fileset header */ |
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}; |
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#endif /* _VXFS_OLT_H_ */
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