53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/*
|
|
* arch/score/lib/csum_partial_copy.c
|
|
*
|
|
* Score Processor version.
|
|
*
|
|
* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
|
|
* Lennox Wu <lennox.wu@sunplusct.com>
|
|
* Chen Liqin <liqin.chen@sunplusct.com>
|
|
*
|
|
* 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, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <net/checksum.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
unsigned int csum_partial_copy(const char *src, char *dst,
|
|
int len, unsigned int sum)
|
|
{
|
|
sum = csum_partial(src, len, sum);
|
|
memcpy(dst, src, len);
|
|
|
|
return sum;
|
|
}
|
|
|
|
unsigned int csum_partial_copy_from_user(const char *src, 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);
|
|
}
|