/*
 *  Directory content modification detection for Linux
 *   
 *  Copyright (C) 2004 Norbert Frese
 *
 *  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, 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.
 */     
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/nonotify.h> 
#include <linux/spinlock.h>
/* 
 * Report mtime of this dentry to dcontents_mtime of the parent directory.
 * Should get invoked inside file-write system calls. Take care that i_mtime
 * is set to the current time before this is invoked.
 */
void nonotify_parent(struct dentry *dentry)
{
	struct dentry *parent;
	spin_lock(&dentry->d_lock);
	parent = dentry->d_parent;

	dget(parent);
	/* Assumption: This is faster than current_kernel_time(). If not - consider replacement */
	parent->d_inode->i_dcontents_mtime = dentry->d_inode->i_mtime;
	dput(parent);
	spin_unlock(&dentry->d_lock);
}

EXPORT_SYMBOL_GPL(nonotify_parent);