4 files changed, 8 insertions, 57 deletions

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 168ec07e31cc..2bcb981c91aa 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -262,7 +262,7 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev,
 	skb->transport_header = skb->network_header + sizeof(*hdr);
 	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 
-	pkt_len = ntohs(hdr->payload_len);
+	pkt_len = ipv6_payload_len(skb, hdr);
 
 	/* pkt_len may be zero if Jumbo payload option is present */
 	if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 32a104ead876..bd7f780e37a5 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -94,7 +94,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
 	struct sk_buff *segs = ERR_PTR(-EINVAL);
 	struct ipv6hdr *ipv6h;
 	const struct net_offload *ops;
-	int proto, err;
+	int proto;
 	struct frag_hdr *fptr;
 	unsigned int payload_len;
 	u8 *prevhdr;
@@ -104,9 +104,6 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
 	bool gso_partial;
 
 	skb_reset_network_header(skb);
-	err = ipv6_hopopt_jumbo_remove(skb);
-	if (err)
-		return ERR_PTR(err);
 	nhoff = skb_network_header(skb) - skb_mac_header(skb);
 	if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
 		goto out;
@@ -336,41 +333,14 @@ INDIRECT_CALLABLE_SCOPE int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
 	const struct net_offload *ops;
 	struct ipv6hdr *iph;
 	int err = -ENOSYS;
-	u32 payload_len;
 
 	if (skb->encapsulation) {
 		skb_set_inner_protocol(skb, cpu_to_be16(ETH_P_IPV6));
 		skb_set_inner_network_header(skb, nhoff);
 	}
 
-	payload_len = skb->len - nhoff - sizeof(*iph);
-	if (unlikely(payload_len > IPV6_MAXPLEN)) {
-		struct hop_jumbo_hdr *hop_jumbo;
-		int hoplen = sizeof(*hop_jumbo);
-
-		/* Move network header left */
-		memmove(skb_mac_header(skb) - hoplen, skb_mac_header(skb),
-			skb->transport_header - skb->mac_header);
-		skb->data -= hoplen;
-		skb->len += hoplen;
-		skb->mac_header -= hoplen;
-		skb->network_header -= hoplen;
-		iph = (struct ipv6hdr *)(skb->data + nhoff);
-		hop_jumbo = (struct hop_jumbo_hdr *)(iph + 1);
-
-		/* Build hop-by-hop options */
-		hop_jumbo->nexthdr = iph->nexthdr;
-		hop_jumbo->hdrlen = 0;
-		hop_jumbo->tlv_type = IPV6_TLV_JUMBO;
-		hop_jumbo->tlv_len = 4;
-		hop_jumbo->jumbo_payload_len = htonl(payload_len + hoplen);
-
-		iph->nexthdr = NEXTHDR_HOP;
-		iph->payload_len = 0;
-	} else {
-		iph = (struct ipv6hdr *)(skb->data + nhoff);
-		iph->payload_len = htons(payload_len);
-	}
+	iph = (struct ipv6hdr *)(skb->data + nhoff);
+	ipv6_set_payload_len(iph, skb->len - nhoff - sizeof(*iph));
 
 	nhoff += sizeof(*iph) + ipv6_exthdrs_len(iph, &ops);
 
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e622a9e086cc..769c39fed1f3 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -179,8 +179,7 @@ ip6_finish_output_gso_slowpath_drop(struct net *net, struct sock *sk,
 static int ip6_finish_output_gso(struct net *net, struct sock *sk,
 				 struct sk_buff *skb, unsigned int mtu)
 {
-	if (unlikely(!(IP6CB(skb)->flags & IP6SKB_FAKEJUMBO) &&
-	    !skb_gso_validate_network_len(skb, mtu)))
+	if (unlikely(!skb_gso_validate_network_len(skb, mtu)))
 		return ip6_finish_output_gso_slowpath_drop(net, sk, skb, mtu);
 
 	return ip6_finish_output2(net, sk, skb);
@@ -273,8 +272,6 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	struct in6_addr *first_hop = &fl6->daddr;
 	struct dst_entry *dst = skb_dst(skb);
 	struct inet6_dev *idev = ip6_dst_idev(dst);
-	struct hop_jumbo_hdr *hop_jumbo;
-	int hoplen = sizeof(*hop_jumbo);
 	struct net *net = sock_net(sk);
 	unsigned int head_room;
 	struct net_device *dev;
@@ -287,7 +284,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	rcu_read_lock();
 
 	dev = dst_dev_rcu(dst);
-	head_room = sizeof(struct ipv6hdr) + hoplen + LL_RESERVED_SPACE(dev);
+	head_room = sizeof(struct ipv6hdr) + LL_RESERVED_SPACE(dev);
 	if (opt)
 		head_room += opt->opt_nflen + opt->opt_flen;
 
@@ -313,19 +310,8 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 						     &fl6->saddr);
 	}
 
-	if (unlikely(seg_len > IPV6_MAXPLEN)) {
-		hop_jumbo = __skb_push(skb, hoplen);
-
-		hop_jumbo->nexthdr = proto;
-		hop_jumbo->hdrlen = 0;
-		hop_jumbo->tlv_type = IPV6_TLV_JUMBO;
-		hop_jumbo->tlv_len = 4;
-		hop_jumbo->jumbo_payload_len = htonl(seg_len + hoplen);
-
-		proto = IPPROTO_HOPOPTS;
+	if (unlikely(seg_len > IPV6_MAXPLEN))
 		seg_len = 0;
-		IP6CB(skb)->flags |= IP6SKB_FAKEJUMBO;
-	}
 
 	__skb_push(skb, sizeof(struct ipv6hdr));
 	skb_reset_network_header(skb);
diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index 1c9b283a4132..cba1684a3f30 100644
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -125,12 +125,7 @@ EXPORT_SYMBOL(ip6_dst_hoplimit);
 
 int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
-	int len;
-
-	len = skb->len - sizeof(struct ipv6hdr);
-	if (len > IPV6_MAXPLEN)
-		len = 0;
-	ipv6_hdr(skb)->payload_len = htons(len);
+	ipv6_set_payload_len(ipv6_hdr(skb), skb->len - sizeof(struct ipv6hdr));
 	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 
 	/* if egress device is enslaved to an L3 master device pass the