Merge tag 'staging-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...

[~andy/linux] / net / ipv6 / ip6_offload.c

diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 1e8683b135bb7b503d9ab97d5c3c165af2453fa1..59f95affceb0773d052184bdf5fec9f276433d63 100644 (file)
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -89,7 +89,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
        unsigned int unfrag_ip6hlen;
        u8 *prevhdr;
        int offset = 0;
-       bool tunnel;
+       bool encap, udpfrag;
        int nhoff;
 
        if (unlikely(skb_shinfo(skb)->gso_type &
@@ -110,8 +110,8 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
        if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
                goto out;
 
-       tunnel = SKB_GSO_CB(skb)->encap_level > 0;
-       if (tunnel)
+       encap = SKB_GSO_CB(skb)->encap_level > 0;
+       if (encap)
                features = skb->dev->hw_enc_features & netif_skb_features(skb);
        SKB_GSO_CB(skb)->encap_level += sizeof(*ipv6h);
 
@@ -121,6 +121,12 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
 
        proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
 
+       if (skb->encapsulation &&
+           skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP))
+               udpfrag = proto == IPPROTO_UDP && encap;
+       else
+               udpfrag = proto == IPPROTO_UDP && !skb->encapsulation;
+
        ops = rcu_dereference(inet6_offloads[proto]);
        if (likely(ops && ops->callbacks.gso_segment)) {
                skb_reset_transport_header(skb);
@@ -133,13 +139,9 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
        for (skb = segs; skb; skb = skb->next) {
                ipv6h = (struct ipv6hdr *)(skb_mac_header(skb) + nhoff);
                ipv6h->payload_len = htons(skb->len - nhoff - sizeof(*ipv6h));
-               if (tunnel) {
-                       skb_reset_inner_headers(skb);
-                       skb->encapsulation = 1;
-               }
                skb->network_header = (u8 *)ipv6h - skb->head;
 
-               if (!tunnel && proto == IPPROTO_UDP) {
+               if (udpfrag) {
                        unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
                        fptr = (struct frag_hdr *)((u8 *)ipv6h + unfrag_ip6hlen);
                        fptr->frag_off = htons(offset);
@@ -148,6 +150,8 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
                        offset += (ntohs(ipv6h->payload_len) -
                                   sizeof(struct frag_hdr));
                }
+               if (encap)
+                       skb_reset_inner_headers(skb);
        }
 
 out: