netfilter: utils: move nf_ip6_checksum* from ipv6 to utils

similar to previous change, this also allows to remove it
from nf_ipv6_ops and avoid the indirection.

It also removes the bogus dependency of nf_conntrack_ipv6 on ipv6 module:
ipv6 checksum functions are built into kernel even if CONFIG_IPV6=m,
but ipv6/netfilter.o isn't.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 0 insertions, 62 deletions

diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 531d6957af36..5ae8e1c51079 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -15,7 +15,6 @@
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
 #include <net/xfrm.h>
-#include <net/ip6_checksum.h>
 #include <net/netfilter/nf_queue.h>
 
 int ip6_route_me_harder(struct net *net, struct sk_buff *skb)
@@ -106,71 +105,10 @@ static int nf_ip6_route(struct net *net, struct dst_entry **dst,
 	return err;
 }
 
-__sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
-			     unsigned int dataoff, u_int8_t protocol)
-{
-	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-	__sum16 csum = 0;
-
-	switch (skb->ip_summed) {
-	case CHECKSUM_COMPLETE:
-		if (hook != NF_INET_PRE_ROUTING && hook != NF_INET_LOCAL_IN)
-			break;
-		if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
-				     skb->len - dataoff, protocol,
-				     csum_sub(skb->csum,
-					      skb_checksum(skb, 0,
-							   dataoff, 0)))) {
-			skb->ip_summed = CHECKSUM_UNNECESSARY;
-			break;
-		}
-		/* fall through */
-	case CHECKSUM_NONE:
-		skb->csum = ~csum_unfold(
-				csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
-					     skb->len - dataoff,
-					     protocol,
-					     csum_sub(0,
-						      skb_checksum(skb, 0,
-								   dataoff, 0))));
-		csum = __skb_checksum_complete(skb);
-	}
-	return csum;
-}
-EXPORT_SYMBOL(nf_ip6_checksum);
-
-static __sum16 nf_ip6_checksum_partial(struct sk_buff *skb, unsigned int hook,
-				       unsigned int dataoff, unsigned int len,
-				       u_int8_t protocol)
-{
-	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-	__wsum hsum;
-	__sum16 csum = 0;
-
-	switch (skb->ip_summed) {
-	case CHECKSUM_COMPLETE:
-		if (len == skb->len - dataoff)
-			return nf_ip6_checksum(skb, hook, dataoff, protocol);
-		/* fall through */
-	case CHECKSUM_NONE:
-		hsum = skb_checksum(skb, 0, dataoff, 0);
-		skb->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr,
-							 &ip6h->daddr,
-							 skb->len - dataoff,
-							 protocol,
-							 csum_sub(0, hsum)));
-		skb->ip_summed = CHECKSUM_NONE;
-		return __skb_checksum_complete_head(skb, dataoff + len);
-	}
-	return csum;
-};
-
 static const struct nf_ipv6_ops ipv6ops = {
 	.chk_addr		= ipv6_chk_addr,
 	.route_input    	= ip6_route_input,
 	.fragment		= ip6_fragment,
-	.checksum		= nf_ip6_checksum,
-	.checksum_partial	= nf_ip6_checksum_partial,
 	.route			= nf_ip6_route,
 	.reroute		= nf_ip6_reroute,
 };