34 строки
729 B
C
34 строки
729 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <net/checksum.h>
|
|
|
|
#include <asm/byteorder.h>
|
|
|
|
/*
|
|
* copy from fs while checksumming, otherwise like csum_partial
|
|
*/
|
|
__wsum
|
|
csum_partial_copy_from_user(const void __user *src, void *dst, int len,
|
|
__wsum sum, int *csum_err)
|
|
{
|
|
int missing;
|
|
|
|
missing = __copy_from_user(dst, src, len);
|
|
if (missing) {
|
|
memset(dst + len - missing, 0, missing);
|
|
*csum_err = -EFAULT;
|
|
} else
|
|
*csum_err = 0;
|
|
|
|
return csum_partial(dst, len, sum);
|
|
}
|
|
EXPORT_SYMBOL(csum_partial_copy_from_user);
|
|
|
|
/* These are from csum_64plus.S */
|
|
EXPORT_SYMBOL(csum_partial);
|
|
EXPORT_SYMBOL(csum_partial_copy);
|
|
EXPORT_SYMBOL(ip_compute_csum);
|
|
EXPORT_SYMBOL(ip_fast_csum);
|