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authorJiri Benc <jbenc@redhat.com>2016-04-27 12:29:07 +0300
committerDavid S. Miller <davem@davemloft.net>2016-04-29 00:02:45 +0300
commit2090714e1d6e80979dd6926be22b0de9ca432273 (patch)
treef8745a471e54642e31bd682dc16eadc1b09ff568 /net/ipv4/ip_gre.c
parenta64b04d86d14c81f50f68e102f79ef301e3d0a0e (diff)
downloadlinux-2090714e1d6e80979dd6926be22b0de9ca432273.tar.xz
gre: build header correctly for collect metadata tunnels
In ipgre (i.e. not gretap) + collect metadata mode, the skb was assumed to contain Ethernet header and was encapsulated as ETH_P_TEB. This is not the case, the interface is ARPHRD_IPGRE and the protocol to be used for encapsulation is skb->protocol. Fixes: 2e15ea390e6f4 ("ip_gre: Add support to collect tunnel metadata.") Signed-off-by: Jiri Benc <jbenc@redhat.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
-rw-r--r--net/ipv4/ip_gre.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index d0abde4236af..f973e0a58993 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -523,7 +523,8 @@ static struct rtable *gre_get_rt(struct sk_buff *skb,
return ip_route_output_key(net, fl);
}
-static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev)
+static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev,
+ __be16 proto)
{
struct ip_tunnel_info *tun_info;
const struct ip_tunnel_key *key;
@@ -575,7 +576,7 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev)
}
flags = tun_info->key.tun_flags & (TUNNEL_CSUM | TUNNEL_KEY);
- build_header(skb, tunnel_hlen, flags, htons(ETH_P_TEB),
+ build_header(skb, tunnel_hlen, flags, proto,
tunnel_id_to_key(tun_info->key.tun_id), 0);
df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
@@ -616,7 +617,7 @@ static netdev_tx_t ipgre_xmit(struct sk_buff *skb,
const struct iphdr *tnl_params;
if (tunnel->collect_md) {
- gre_fb_xmit(skb, dev);
+ gre_fb_xmit(skb, dev, skb->protocol);
return NETDEV_TX_OK;
}
@@ -660,7 +661,7 @@ static netdev_tx_t gre_tap_xmit(struct sk_buff *skb,
struct ip_tunnel *tunnel = netdev_priv(dev);
if (tunnel->collect_md) {
- gre_fb_xmit(skb, dev);
+ gre_fb_xmit(skb, dev, htons(ETH_P_TEB));
return NETDEV_TX_OK;
}