1 /* 2 * Copyright (c) 2000-2001 Christoph Hellwig. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * Alternatively, this software may be distributed under the terms of the 15 * GNU General Public License ("GPL"). 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 #ifndef _VXFS_OLT_H_ 31 #define _VXFS_OLT_H_ 32 33 #ident "$Id: vxfs_olt.h,v 1.5 2001/04/25 18:11:23 hch Exp hch $" 34 35 /* 36 * Veritas filesystem driver - Object Location Table data structures. 37 * 38 * This file contains definitions for the Object Location Table used 39 * by the Veritas Filesystem version 2 and newer. 40 */ 41 42 43 /* 44 * OLT magic number (vxfs_olt->olt_magic). 45 */ 46 #define VXFS_OLT_MAGIC 0xa504FCF5 47 48 /* 49 * VxFS OLT entry types. 50 */ 51 enum { 52 VXFS_OLT_FREE = 1, 53 VXFS_OLT_FSHEAD = 2, 54 VXFS_OLT_CUT = 3, 55 VXFS_OLT_ILIST = 4, 56 VXFS_OLT_DEV = 5, 57 VXFS_OLT_SB = 6 58 }; 59 60 /* 61 * VxFS OLT header. 62 * 63 * The Object Location Table header is placed at the beginning of each 64 * OLT extent. It is used to fing certain filesystem-wide metadata, e.g. 65 * the inital inode list, the fileset header or the device configuration. 66 */ 67 struct vxfs_olt { 68 u_int32_t olt_magic; /* magic number */ 69 u_int32_t olt_size; /* size of this entry */ 70 u_int32_t olt_checksum; /* checksum of extent */ 71 u_int32_t __unused1; /* ??? */ 72 u_int32_t olt_mtime; /* time of last mod. (sec) */ 73 u_int32_t olt_mutime; /* time of last mod. (usec) */ 74 u_int32_t olt_totfree; /* free space in OLT extent */ 75 vx_daddr_t olt_extents[2]; /* addr of this extent, replica */ 76 u_int32_t olt_esize; /* size of this extent */ 77 vx_daddr_t olt_next[2]; /* addr of next extent, replica */ 78 u_int32_t olt_nsize; /* size of next extent */ 79 u_int32_t __unused2; /* align to 8 byte boundary */ 80 }; 81 82 /* 83 * VxFS common OLT entry (on disk). 84 */ 85 struct vxfs_oltcommon { 86 u_int32_t olt_type; /* type of this record */ 87 u_int32_t olt_size; /* size of this record */ 88 }; 89 90 /* 91 * VxFS free OLT entry (on disk). 92 */ 93 struct vxfs_oltfree { 94 u_int32_t olt_type; /* type of this record */ 95 u_int32_t olt_fsize; /* size of this free record */ 96 }; 97 98 /* 99 * VxFS initial-inode list (on disk). 100 */ 101 struct vxfs_oltilist { 102 u_int32_t olt_type; /* type of this record */ 103 u_int32_t olt_size; /* size of this record */ 104 vx_ino_t olt_iext[2]; /* initial inode list, replica */ 105 }; 106 107 /* 108 * Current Usage Table 109 */ 110 struct vxfs_oltcut { 111 u_int32_t olt_type; /* type of this record */ 112 u_int32_t olt_size; /* size of this record */ 113 vx_ino_t olt_cutino; /* inode of current usage table */ 114 u_int32_t __pad; /* unused, 8 byte align */ 115 }; 116 117 /* 118 * Inodes containing Superblock, Intent log and OLTs 119 */ 120 struct vxfs_oltsb { 121 u_int32_t olt_type; /* type of this record */ 122 u_int32_t olt_size; /* size of this record */ 123 vx_ino_t olt_sbino; /* inode of superblock file */ 124 u_int32_t __unused1; /* ??? */ 125 vx_ino_t olt_logino[2]; /* inode of log file,replica */ 126 vx_ino_t olt_oltino[2]; /* inode of OLT, replica */ 127 }; 128 129 /* 130 * Inode containing device configuration + it's replica 131 */ 132 struct vxfs_oltdev { 133 u_int32_t olt_type; /* type of this record */ 134 u_int32_t olt_size; /* size of this record */ 135 vx_ino_t olt_devino[2]; /* inode of device config files */ 136 }; 137 138 /* 139 * Fileset header 140 */ 141 struct vxfs_oltfshead { 142 u_int32_t olt_type; /* type number */ 143 u_int32_t olt_size; /* size of this record */ 144 vx_ino_t olt_fsino[2]; /* inodes of fileset header */ 145 }; 146 147 #endif /* _VXFS_OLT_H_ */ 148