[NET]: annotate csum_ipv6_magic() callers in net/*

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/udp.h

@@ -89,9 +89,9 @@ static __inline__ int udp_lib_checksum_complete(struct sk_buff *skb)
  * 	@skb: 	sk_buff containing the filled-in UDP header
  * 	        (checksum field must be zeroed out)
  */
-static inline u32 udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
+static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
 {
-	u32 csum = csum_partial(skb->h.raw, sizeof(struct udphdr), 0);
+	__wsum csum = csum_partial(skb->h.raw, sizeof(struct udphdr), 0);
 
 	skb_queue_walk(&sk->sk_write_queue, skb) {
 		csum = csum_add(csum, skb->csum);

include/net/udplite.h

@@ -124,10 +124,10 @@ static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
 	return cscov;
 }
 
-static inline u32 udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
+static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
 {
-	u32 csum = 0;
 	int off, len, cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
+	__wsum csum = 0;
 
 	skb->ip_summed = CHECKSUM_NONE;     /* no HW support for checksumming */
 

net/dccp/ipv6.c

@@ -59,7 +59,7 @@ static void dccp_v6_hash(struct sock *sk)
 }
 
 /* add pseudo-header to DCCP checksum stored in skb->csum */
-static inline u16 dccp_v6_csum_finish(struct sk_buff *skb,
+static inline __sum16 dccp_v6_csum_finish(struct sk_buff *skb,
 				      struct in6_addr *saddr,
 				      struct in6_addr *daddr)
 {

net/ipv6/icmp.c

@@ -234,7 +234,7 @@ static int icmpv6_push_pending_frames(struct sock *sk, struct flowi *fl, struct
 						      len, fl->proto,
 						      skb->csum);
 	} else {
-		u32 tmp_csum = 0;
+		__wsum tmp_csum = 0;
 
 		skb_queue_walk(&sk->sk_write_queue, skb) {
 			tmp_csum = csum_add(tmp_csum, skb->csum);
@@ -242,10 +242,10 @@ static int icmpv6_push_pending_frames(struct sock *sk, struct flowi *fl, struct
 
 		tmp_csum = csum_partial((char *)icmp6h,
 					sizeof(struct icmp6hdr), tmp_csum);
-		tmp_csum = csum_ipv6_magic(&fl->fl6_src,
-					   &fl->fl6_dst,
-					   len, fl->proto, tmp_csum);
-		icmp6h->icmp6_cksum = tmp_csum;
+		icmp6h->icmp6_cksum = csum_ipv6_magic(&fl->fl6_src,
+						      &fl->fl6_dst,
+						      len, fl->proto,
+						      tmp_csum);
 	}
 	ip6_push_pending_frames(sk);
 out:
@@ -636,8 +636,8 @@ static int icmpv6_rcv(struct sk_buff **pskb)
 			break;
 		/* fall through */
 	case CHECKSUM_NONE:
-		skb->csum = ~csum_ipv6_magic(saddr, daddr, skb->len,
-					     IPPROTO_ICMPV6, 0);
+		skb->csum = ~csum_unfold(csum_ipv6_magic(saddr, daddr, skb->len,
+					     IPPROTO_ICMPV6, 0));
 		if (__skb_checksum_complete(skb)) {
 			LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 checksum failed [" NIP6_FMT " > " NIP6_FMT "]\n",
 				       NIP6(*saddr), NIP6(*daddr));

net/ipv6/mcast.c

@@ -91,7 +91,7 @@ struct mld2_grec {
 struct mld2_report {
 	__u8	type;
 	__u8	resv1;
-	__u16	csum;
+	__sum16	csum;
 	__be16	resv2;
 	__be16	ngrec;
 	struct mld2_grec grec[0];
@@ -100,7 +100,7 @@ struct mld2_report {
 struct mld2_query {
 	__u8 type;
 	__u8 code;
-	__u16 csum;
+	__sum16 csum;
 	__be16 mrc;
 	__be16 resv1;
 	struct in6_addr mca;

net/ipv6/netfilter.c

@@ -100,12 +100,13 @@ unsigned int nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
 		}
 		/* fall through */
 	case CHECKSUM_NONE:
-		skb->csum = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+		skb->csum = ~csum_unfold(
+				csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
 					     skb->len - dataoff,
 					     protocol,
 					     csum_sub(0,
 						      skb_checksum(skb, 0,
-							           dataoff, 0)));
+							           dataoff, 0))));
 		csum = __skb_checksum_complete(skb);
 	}
 	return csum;

net/ipv6/raw.c

@@ -370,9 +370,9 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
 	}
 	if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-		skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
+		skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
 					     &skb->nh.ipv6h->daddr,
-					     skb->len, inet->num, 0);
+					     skb->len, inet->num, 0));
 
 	if (inet->hdrincl) {
 		if (skb_checksum_complete(skb)) {
@@ -479,8 +479,8 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 	int offset;
 	int len;
 	int total_len;
-	u32 tmp_csum;
-	u16 csum;
+	__wsum tmp_csum;
+	__sum16 csum;
 
 	if (!rp->checksum)
 		goto send;
@@ -532,14 +532,13 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
 	if (unlikely(csum))
 		tmp_csum = csum_sub(tmp_csum, csum);
 
-	tmp_csum = csum_ipv6_magic(&fl->fl6_src,
+	csum = csum_ipv6_magic(&fl->fl6_src,
 				   &fl->fl6_dst,
 				   total_len, fl->proto, tmp_csum);
 
 	if (tmp_csum == 0 && fl->proto == IPPROTO_UDP)
 		tmp_csum = -1;
 
-	csum = tmp_csum;
 	if (skb_store_bits(skb, offset, &csum, 2))
 		BUG();
 

net/ipv6/tcp_ipv6.c

@@ -105,10 +105,10 @@ static void tcp_v6_hash(struct sock *sk)
 	}
 }
 
-static __inline__ u16 tcp_v6_check(struct tcphdr *th, int len,
+static __inline__ __sum16 tcp_v6_check(struct tcphdr *th, int len,
 				   struct in6_addr *saddr, 
 				   struct in6_addr *daddr, 
-				   unsigned long base)
+				   __wsum base)
 {
 	return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
 }
@@ -1537,8 +1537,8 @@ static int tcp_v6_checksum_init(struct sk_buff *skb)
 		}
 	}
 
-	skb->csum = ~tcp_v6_check(skb->h.th,skb->len,&skb->nh.ipv6h->saddr,
-				  &skb->nh.ipv6h->daddr, 0);
+	skb->csum = ~csum_unfold(tcp_v6_check(skb->h.th,skb->len,&skb->nh.ipv6h->saddr,
+				  &skb->nh.ipv6h->daddr, 0));
 
 	if (skb->len <= 76) {
 		return __skb_checksum_complete(skb);

net/ipv6/udp.c

@@ -383,9 +383,10 @@ static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh)
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 	if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-		skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
-					     &skb->nh.ipv6h->daddr,
-					     skb->len, IPPROTO_UDP, 0);
+		skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
+							 &skb->nh.ipv6h->daddr,
+							 ulen, IPPROTO_UDP,
+							 0));
 
 	return (UDP_SKB_CB(skb)->partial_cov = 0);
 }
@@ -511,7 +512,7 @@ static int udp_v6_push_pending_frames(struct sock *sk, struct udp_sock *up)
 	struct inet_sock *inet = inet_sk(sk);
 	struct flowi *fl = &inet->cork.fl;
 	int err = 0;
-	u32 csum = 0;
+	__wsum csum = 0;
 
 	/* Grab the skbuff where UDP header space exists. */
 	if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)