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vxlan: fix missing options_len update on RX with collect metadata 

When signalling to metadata consumers that the metadata_dst entry
carries additional GBP extension data for vxlan (TUNNEL_VXLAN_OPT),
the dst's vxlan_metadata information is populated, but options_len
is left to zero. F.e. in ovs, ovs_flow_key_extract() checks for
options_len before extracting the data through ip_tunnel_info_opts_get().

Geneve uses ip_tunnel_info_opts_set() helper in receive path, which
sets options_len internally, vxlan however uses ip_tunnel_info_opts(),
so when filling vxlan_metadata, we do need to update options_len.

Fixes: 4c22279848 ("ip-tunnel: Use API to access tunnel metadata options.")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2016-03-02 02:32:08 +01:00 committed by David S. Miller
parent 42a67c9b0c
commit 4024fcf705
1 changed files with 3 additions and 1 deletions
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4
drivers/net/vxlan.c
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@ -1308,8 +1308,10 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
gbp = (struct vxlanhdr_gbp *)vxh;
md->gbp = ntohs(gbp->policy_id);
if (tun_dst)
if (tun_dst) {
tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
tun_dst->u.tun_info.options_len = sizeof(*md);
}
if (gbp->dont_learn)
md->gbp |= VXLAN_GBP_DONT_LEARN;