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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (c) 2000-2001 Christoph Hellwig.4 */5#ifndef _VXFS_OLT_H_6#define _VXFS_OLT_H_7 8/*9 * Veritas filesystem driver - Object Location Table data structures.10 *11 * This file contains definitions for the Object Location Table used12 * by the Veritas Filesystem version 2 and newer.13 */14 15 16/*17 * OLT magic number (vxfs_olt->olt_magic).18 */19#define VXFS_OLT_MAGIC 0xa504FCF520 21/*22 * VxFS OLT entry types.23 */24enum {25 VXFS_OLT_FREE = 1,26 VXFS_OLT_FSHEAD = 2,27 VXFS_OLT_CUT = 3,28 VXFS_OLT_ILIST = 4,29 VXFS_OLT_DEV = 5,30 VXFS_OLT_SB = 631};32 33/*34 * VxFS OLT header.35 *36 * The Object Location Table header is placed at the beginning of each37 * OLT extent. It is used to fing certain filesystem-wide metadata, e.g.38 * the initial inode list, the fileset header or the device configuration.39 */40struct vxfs_olt {41 __fs32 olt_magic; /* magic number */42 __fs32 olt_size; /* size of this entry */43 __fs32 olt_checksum; /* checksum of extent */44 __u32 __unused1; /* ??? */45 __fs32 olt_mtime; /* time of last mod. (sec) */46 __fs32 olt_mutime; /* time of last mod. (usec) */47 __fs32 olt_totfree; /* free space in OLT extent */48 __fs32 olt_extents[2]; /* addr of this extent, replica */49 __fs32 olt_esize; /* size of this extent */50 __fs32 olt_next[2]; /* addr of next extent, replica */51 __fs32 olt_nsize; /* size of next extent */52 __u32 __unused2; /* align to 8 byte boundary */53};54 55/*56 * VxFS common OLT entry (on disk).57 */58struct vxfs_oltcommon {59 __fs32 olt_type; /* type of this record */60 __fs32 olt_size; /* size of this record */61};62 63/*64 * VxFS free OLT entry (on disk).65 */66struct vxfs_oltfree {67 __fs32 olt_type; /* type of this record */68 __fs32 olt_fsize; /* size of this free record */69};70 71/*72 * VxFS initial-inode list (on disk).73 */74struct vxfs_oltilist {75 __fs32 olt_type; /* type of this record */76 __fs32 olt_size; /* size of this record */77 __fs32 olt_iext[2]; /* initial inode list, replica */78};79 80/*81 * Current Usage Table 82 */83struct vxfs_oltcut {84 __fs32 olt_type; /* type of this record */85 __fs32 olt_size; /* size of this record */86 __fs32 olt_cutino; /* inode of current usage table */87 __u8 __pad; /* unused, 8 byte align */88};89 90/*91 * Inodes containing Superblock, Intent log and OLTs 92 */93struct vxfs_oltsb {94 __fs32 olt_type; /* type of this record */95 __fs32 olt_size; /* size of this record */96 __fs32 olt_sbino; /* inode of superblock file */97 __u32 __unused1; /* ??? */98 __fs32 olt_logino[2]; /* inode of log file,replica */99 __fs32 olt_oltino[2]; /* inode of OLT, replica */100};101 102/*103 * Inode containing device configuration + it's replica 104 */105struct vxfs_oltdev {106 __fs32 olt_type; /* type of this record */107 __fs32 olt_size; /* size of this record */108 __fs32 olt_devino[2]; /* inode of device config files */109};110 111/*112 * Fileset header 113 */114struct vxfs_oltfshead {115 __fs32 olt_type; /* type number */116 __fs32 olt_size; /* size of this record */117 __fs32 olt_fsino[2]; /* inodes of fileset header */118};119 120#endif /* _VXFS_OLT_H_ */121