mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 16:30:52 +07:00
acb3e04119
As suggested by David, udp6_csum_init() is too big to be inlined, move it to ipv6 static library, net/ipv6/ip6_checksum.c. And the generic csum_ipv6_magic() too. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
#include <net/ip.h>
|
|
#include <net/udp.h>
|
|
#include <net/udplite.h>
|
|
#include <asm/checksum.h>
|
|
|
|
#ifndef _HAVE_ARCH_IPV6_CSUM
|
|
__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
|
|
const struct in6_addr *daddr,
|
|
__u32 len, unsigned short proto,
|
|
__wsum csum)
|
|
{
|
|
|
|
int carry;
|
|
__u32 ulen;
|
|
__u32 uproto;
|
|
__u32 sum = (__force u32)csum;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[0];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[0]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[1];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[1]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[2];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[2]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)saddr->s6_addr32[3];
|
|
carry = (sum < (__force u32)saddr->s6_addr32[3]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[0];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[0]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[1];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[1]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[2];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[2]);
|
|
sum += carry;
|
|
|
|
sum += (__force u32)daddr->s6_addr32[3];
|
|
carry = (sum < (__force u32)daddr->s6_addr32[3]);
|
|
sum += carry;
|
|
|
|
ulen = (__force u32)htonl((__u32) len);
|
|
sum += ulen;
|
|
carry = (sum < ulen);
|
|
sum += carry;
|
|
|
|
uproto = (__force u32)htonl(proto);
|
|
sum += uproto;
|
|
carry = (sum < uproto);
|
|
sum += carry;
|
|
|
|
return csum_fold((__force __wsum)sum);
|
|
}
|
|
EXPORT_SYMBOL(csum_ipv6_magic);
|
|
#endif
|
|
|
|
int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto)
|
|
{
|
|
int err;
|
|
|
|
UDP_SKB_CB(skb)->partial_cov = 0;
|
|
UDP_SKB_CB(skb)->cscov = skb->len;
|
|
|
|
if (proto == IPPROTO_UDPLITE) {
|
|
err = udplite_checksum_init(skb, uh);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (uh->check == 0) {
|
|
/* RFC 2460 section 8.1 says that we SHOULD log
|
|
this error. Well, it is reasonable.
|
|
*/
|
|
LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
|
|
return 1;
|
|
}
|
|
if (skb->ip_summed == CHECKSUM_COMPLETE &&
|
|
!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
|
|
skb->len, proto, skb->csum))
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
if (!skb_csum_unnecessary(skb))
|
|
skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
&ipv6_hdr(skb)->daddr,
|
|
skb->len, proto, 0));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(udp6_csum_init);
|