blob: 6e9f366f961d5ce38413d34ed281711f17465722 [file] [log] [blame]
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
* Copyright (C) 1994, 1995 Waldorf Electronics GmbH
* Copyright (C) 1998, 1999 Ralf Baechle
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#include <asm/string.h>
#include <asm/uaccess.h>
#include <net/checksum.h>
* copy while checksumming, otherwise like csum_partial
unsigned int csum_partial_copy_nocheck(const unsigned char *src,
unsigned char *dst, int len, unsigned int sum)
* It's 2:30 am and I don't feel like doing it real ...
* This is lots slower than the real thing (tm)
sum = csum_partial(src, len, sum);
memcpy(dst, src, len);
return sum;
* Copy from userspace and compute checksum. If we catch an exception
* then zero the rest of the buffer.
unsigned int csum_partial_copy_from_user (const unsigned char __user *src,
unsigned char *dst, int len, unsigned int sum, int *err_ptr)
int missing;
missing = copy_from_user(dst, src, len);
if (missing) {
memset(dst + len - missing, 0, missing);
*err_ptr = -EFAULT;
return csum_partial(dst, len, sum);