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/*

 * Temporal C versions of the checksum functions until optimized assembler versions

 * can go in.

 */

#include <net/checksum.h>

/*

 * 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 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);

}

unsigned int csum_partial_copy_nocheck(const char *src, char *dst, int len, unsigned int sum)

{

        memcpy(dst,src,len);

        return csum_partial(dst,len,sum);

}

/* Fallback for csum_and_copy_to_user is currently in include/net/checksum.h */