/*
* Copyright (c) 2020 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* $Id: //eng/uds-releases/jasper/src/uds/indexVersion.c#1 $
*/
#include "indexVersion.h"
void initializeIndexVersion(struct index_version *version,
uint32_t superVersion)
{
/*
* Version 1 was introduced for the first single file layout. It was used in
* RHEL7 and in RHEL8.0 Beta. No kernel index ever used an earlier version.
*/
/*
* Version 2 was created when we discovered that the volume header page was
* written in native endian format. It was used in RHEL8.0 and RHEL8.1. We
* stopped reading and the volume header page, and changed to version 2 so
* that an index creaed on RHEL8 cannot be taken back an used on RHEL7.
*
* Versions 1 and 2 are identical in normal operation (i.e. after the index
* is loaded).
*/
/*
* Version 3 was created when we discovered the the chapter index headers
* were written in native endian format. It was first used in RHEL8.2 and is
* the current version for new indices.
*
* Versions before 3 read and write native endian chapter headers. Version 3
* reads chapter headers in any endian order, and writes little-endian
* chapter headers.
*/
bool chapterIndexHeaderNativeEndian = superVersion < 3;
*version = (struct index_version) {
.chapterIndexHeaderNativeEndian = chapterIndexHeaderNativeEndian,
};
}