Merge branch 'master' into for-2.6.35

Conflicts:
	fs/ext3/fsync.c

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 41 insertions, 27 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 075f540ec19..2b7c3a100e2 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -75,6 +75,9 @@ static void	tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
 				      struct request_sock *req);
 
 static int	tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
+static void	__tcp_v6_send_check(struct sk_buff *skb,
+				    struct in6_addr *saddr,
+				    struct in6_addr *daddr);
 
 static const struct inet_connection_sock_af_ops ipv6_mapped;
 static const struct inet_connection_sock_af_ops ipv6_specific;
@@ -350,6 +353,11 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	if (sk->sk_state == TCP_CLOSE)
 		goto out;
 
+	if (ipv6_hdr(skb)->hop_limit < inet6_sk(sk)->min_hopcount) {
+		NET_INC_STATS_BH(net, LINUX_MIB_TCPMINTTLDROP);
+		goto out;
+	}
+
 	tp = tcp_sk(sk);
 	seq = ntohl(th->seq);
 	if (sk->sk_state != TCP_LISTEN &&
@@ -503,14 +511,10 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 
 	skb = tcp_make_synack(sk, dst, req, rvp);
 	if (skb) {
-		struct tcphdr *th = tcp_hdr(skb);
-
-		th->check = tcp_v6_check(skb->len,
-					 &treq->loc_addr, &treq->rmt_addr,
-					 csum_partial(th, skb->len, skb->csum));
+		__tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
 
 		ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
-		err = ip6_xmit(sk, skb, &fl, opt, 0);
+		err = ip6_xmit(sk, skb, &fl, opt);
 		err = net_xmit_eval(err);
 	}
 
@@ -600,7 +604,7 @@ static int tcp_v6_md5_do_add(struct sock *sk, struct in6_addr *peer,
 				kfree(newkey);
 				return -ENOMEM;
 			}
-			sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
+			sk_nocaps_add(sk, NETIF_F_GSO_MASK);
 		}
 		if (tcp_alloc_md5sig_pool(sk) == NULL) {
 			kfree(newkey);
@@ -737,7 +741,7 @@ static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval,
 			return -ENOMEM;
 
 		tp->md5sig_info = p;
-		sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
+		sk_nocaps_add(sk, NETIF_F_GSO_MASK);
 	}
 
 	newkey = kmemdup(cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL);
@@ -918,22 +922,29 @@ static struct timewait_sock_ops tcp6_timewait_sock_ops = {
 	.twsk_destructor= tcp_twsk_destructor,
 };
 
-static void tcp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb)
+static void __tcp_v6_send_check(struct sk_buff *skb,
+				struct in6_addr *saddr, struct in6_addr *daddr)
 {
-	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct tcphdr *th = tcp_hdr(skb);
 
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		th->check = ~csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,  0);
+		th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
 		skb->csum_start = skb_transport_header(skb) - skb->head;
 		skb->csum_offset = offsetof(struct tcphdr, check);
 	} else {
-		th->check = csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,
-					    csum_partial(th, th->doff<<2,
-							 skb->csum));
+		th->check = tcp_v6_check(skb->len, saddr, daddr,
+					 csum_partial(th, th->doff << 2,
+						      skb->csum));
 	}
 }
 
+static void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+
+	__tcp_v6_send_check(skb, &np->saddr, &np->daddr);
+}
+
 static int tcp_v6_gso_send_check(struct sk_buff *skb)
 {
 	struct ipv6hdr *ipv6h;
@@ -946,11 +957,8 @@ static int tcp_v6_gso_send_check(struct sk_buff *skb)
 	th = tcp_hdr(skb);
 
 	th->check = 0;
-	th->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len,
-				     IPPROTO_TCP, 0);
-	skb->csum_start = skb_transport_header(skb) - skb->head;
-	skb->csum_offset = offsetof(struct tcphdr, check);
 	skb->ip_summed = CHECKSUM_PARTIAL;
+	__tcp_v6_send_check(skb, &ipv6h->saddr, &ipv6h->daddr);
 	return 0;
 }
 
@@ -1047,15 +1055,14 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	}
 #endif
 
-	buff->csum = csum_partial(t1, tot_len, 0);
-
 	memset(&fl, 0, sizeof(fl));
 	ipv6_addr_copy(&fl.fl6_dst, &ipv6_hdr(skb)->saddr);
 	ipv6_addr_copy(&fl.fl6_src, &ipv6_hdr(skb)->daddr);
 
-	t1->check = csum_ipv6_magic(&fl.fl6_src, &fl.fl6_dst,
-				    tot_len, IPPROTO_TCP,
-				    buff->csum);
+	buff->ip_summed = CHECKSUM_PARTIAL;
+	buff->csum = 0;
+
+	__tcp_v6_send_check(buff, &fl.fl6_src, &fl.fl6_dst);
 
 	fl.proto = IPPROTO_TCP;
 	fl.oif = inet6_iif(skb);
@@ -1070,7 +1077,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) {
 		if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) {
 			skb_dst_set(buff, dst);
-			ip6_xmit(ctl_sk, buff, &fl, NULL, 0);
+			ip6_xmit(ctl_sk, buff, &fl, NULL);
 			TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 			if (rst)
 				TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
@@ -1233,12 +1240,12 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
 			goto drop_and_free;
 
 		/* Secret recipe starts with IP addresses */
-		d = &ipv6_hdr(skb)->daddr.s6_addr32[0];
+		d = (__force u32 *)&ipv6_hdr(skb)->daddr.s6_addr32[0];
 		*mess++ ^= *d++;
 		*mess++ ^= *d++;
 		*mess++ ^= *d++;
 		*mess++ ^= *d++;
-		d = &ipv6_hdr(skb)->saddr.s6_addr32[0];
+		d = (__force u32 *)&ipv6_hdr(skb)->saddr.s6_addr32[0];
 		*mess++ ^= *d++;
 		*mess++ ^= *d++;
 		*mess++ ^= *d++;
@@ -1676,6 +1683,7 @@ ipv6_pktoptions:
 static int tcp_v6_rcv(struct sk_buff *skb)
 {
 	struct tcphdr *th;
+	struct ipv6hdr *hdr;
 	struct sock *sk;
 	int ret;
 	struct net *net = dev_net(skb->dev);
@@ -1702,12 +1710,13 @@ static int tcp_v6_rcv(struct sk_buff *skb)
 		goto bad_packet;
 
 	th = tcp_hdr(skb);
+	hdr = ipv6_hdr(skb);
 	TCP_SKB_CB(skb)->seq = ntohl(th->seq);
 	TCP_SKB_CB(skb)->end_seq = (TCP_SKB_CB(skb)->seq + th->syn + th->fin +
 				    skb->len - th->doff*4);
 	TCP_SKB_CB(skb)->ack_seq = ntohl(th->ack_seq);
 	TCP_SKB_CB(skb)->when = 0;
-	TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb));
+	TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(hdr);
 	TCP_SKB_CB(skb)->sacked = 0;
 
 	sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
@@ -1718,6 +1727,11 @@ process:
 	if (sk->sk_state == TCP_TIME_WAIT)
 		goto do_time_wait;
 
+	if (hdr->hop_limit < inet6_sk(sk)->min_hopcount) {
+		NET_INC_STATS_BH(net, LINUX_MIB_TCPMINTTLDROP);
+		goto discard_and_relse;
+	}
+
 	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
 		goto discard_and_relse;