Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix checksumming regressions, from Tom Herbert.

 2) Undo unintentional permissions changes for SCTP rto_alpha and
    rto_beta sysfs knobs, from Denial Borkmann.

 3) VXLAN, like other IP tunnels, should advertize it's encapsulation
    size using dev->needed_headroom instead of dev->hard_header_len.
    From Cong Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net: sctp: fix permissions for rto_alpha and rto_beta knobs
  vxlan: Checksum fixes
  net: add skb_pop_rcv_encapsulation
  udp: call __skb_checksum_complete when doing full checksum
  net: Fix save software checksum complete
  net: Fix GSO constants to match NETIF flags
  udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookup
  vxlan: use dev->needed_headroom instead of dev->hard_header_len
  MAINTAINERS: update cxgb4 maintainer

1 files changed, 5 insertions, 13 deletions

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 1610d51dbb5c..ade33ef82823 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1156,15 +1156,7 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
         if (!vs)
                 goto drop;
 
-        /* If the NIC driver gave us an encapsulated packet
-         * with the encapsulation mark, the device checksummed it
-         * for us. Otherwise force the upper layers to verify it.
-         */
-        if ((skb->ip_summed != CHECKSUM_UNNECESSARY && skb->ip_summed != CHECKSUM_PARTIAL) ||
-            !skb->encapsulation)
-                skb->ip_summed = CHECKSUM_NONE;
-
-        skb->encapsulation = 0;
+        skb_pop_rcv_encapsulation(skb);
 
         vs->rcv(vs, skb, vxh->vx_vni);
         return 0;
@@ -1201,6 +1193,7 @@ static void vxlan_rcv(struct vxlan_sock *vs,
         skb_reset_mac_header(skb);
         skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
         skb->protocol = eth_type_trans(skb, vxlan->dev);
+        skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
 
         /* Ignore packet loops (and multicast echo) */
         if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
@@ -2247,9 +2240,9 @@ static void vxlan_setup(struct net_device *dev)
         eth_hw_addr_random(dev);
         ether_setup(dev);
         if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6)
-                dev->hard_header_len = ETH_HLEN + VXLAN6_HEADROOM;
+                dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM;
         else
-                dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM;
+                dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
 
         dev->netdev_ops = &vxlan_netdev_ops;
         dev->destructor = free_netdev;
@@ -2646,8 +2639,7 @@ static int vxlan_newlink(struct net *net, struct net_device *dev,
                 if (!tb[IFLA_MTU])
                         dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
 
-                /* update header length based on lower device */
-                dev->hard_header_len = lowerdev->hard_header_len +
+                dev->needed_headroom = lowerdev->hard_header_len +
                                        (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
         } else if (use_ipv6)
                 vxlan->flags |= VXLAN_F_IPV6;