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view yaffs_tagsvalidity.c @ 400:fb6ffedcfa89

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Add one-shot feature for yaffs auto checkpointing. This feature is enabling by ORing in 0x04 to the yaffs_auto_checkpoint module parameter. This will do a one-shot checkpoint on the next sync and the bit will then be reset. This is a nice way to force a checkpoint on the next sync. eg. echo 6 > /sys/modules/yaffs/parameters/yaffs_auto_checkpoint sync yaffs_auto_checkpoint will now be 2 Signed-off-by: Charles Manning <cdhmanning@gmail.com>
author Charles Manning <cdhmanning@gmail.com>
date Mon, 12 Apr 2010 16:55:22 +1200
parents c0dfae9e8073
children b5309c9b6d7f
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/*
 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
 *
 * Copyright (C) 2002-2007 Aleph One Ltd.
 *   for Toby Churchill Ltd and Brightstar Engineering
 *
 * Created by Charles Manning <charles@aleph1.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "yaffs_tagsvalidity.h"

void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
{
	memset(tags, 0, sizeof(yaffs_ExtendedTags));
	tags->validMarker0 = 0xAAAAAAAA;
	tags->validMarker1 = 0x55555555;
}

int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
{
	return (tags->validMarker0 == 0xAAAAAAAA &&
		tags->validMarker1 == 0x55555555);

}