/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * 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 version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

# define DEBUG_SUBSYSTEM S_LNET

#include <linux/fs.h>
#include <linux/kdev_t.h>
#include <linux/ctype.h>
#include <asm/uaccess.h>

#include <libcfs/libcfs.h>

/* write a userspace buffer to disk.
 * NOTE: this returns 0 on success, not the number of bytes written. */
ssize_t
filp_user_write(struct file *filp, const void *buf, size_t count,
		loff_t *offset)
{
	mm_segment_t fs;
	ssize_t size = 0;

	fs = get_fs();
	set_fs(KERNEL_DS);
	while ((ssize_t)count > 0) {
		size = vfs_write(filp, (const void __user *)buf, count, offset);
		if (size < 0)
			break;
		count -= size;
                buf += size;
		size = 0;
	}
	set_fs(fs);

	return size;
}
EXPORT_SYMBOL(filp_user_write);

#if !(CFS_O_CREAT == O_CREAT && CFS_O_EXCL == O_EXCL &&	\
     CFS_O_NOACCESS == O_NOACCESS &&\
     CFS_O_TRUNC == O_TRUNC && CFS_O_APPEND == O_APPEND &&\
     CFS_O_NONBLOCK == O_NONBLOCK && CFS_O_NDELAY == O_NDELAY &&\
     CFS_O_SYNC == O_SYNC && CFS_O_ASYNC == FASYNC &&\
     CFS_O_DIRECT == O_DIRECT && CFS_O_LARGEFILE == O_LARGEFILE &&\
     CFS_O_DIRECTORY == O_DIRECTORY && CFS_O_NOFOLLOW == O_NOFOLLOW)

int cfs_oflags2univ(int flags)
{
	int f;

	f = flags & O_NOACCESS;
	f |= (flags & O_CREAT) ? CFS_O_CREAT: 0;
	f |= (flags & O_EXCL) ? CFS_O_EXCL: 0;
	f |= (flags & O_NOCTTY) ? CFS_O_NOCTTY: 0;
	f |= (flags & O_TRUNC) ? CFS_O_TRUNC: 0;
	f |= (flags & O_APPEND) ? CFS_O_APPEND: 0;
	f |= (flags & O_NONBLOCK) ? CFS_O_NONBLOCK: 0;
	f |= (flags & O_SYNC)? CFS_O_SYNC: 0;
	f |= (flags & FASYNC)? CFS_O_ASYNC: 0;
	f |= (flags & O_DIRECTORY)? CFS_O_DIRECTORY: 0;
	f |= (flags & O_DIRECT)? CFS_O_DIRECT: 0;
	f |= (flags & O_LARGEFILE)? CFS_O_LARGEFILE: 0;
	f |= (flags & O_NOFOLLOW)? CFS_O_NOFOLLOW: 0;
	f |= (flags & O_NOATIME)? CFS_O_NOATIME: 0;
	return f;
}
#else

int cfs_oflags2univ(int flags)
{
	return (flags);
}
#endif
EXPORT_SYMBOL(cfs_oflags2univ);

/*
 * XXX Liang: we don't need cfs_univ2oflags() now.
 */
int cfs_univ2oflags(int flags)
{
	return (flags);
}
EXPORT_SYMBOL(cfs_univ2oflags);