bpf: fix bpf_skb_set_tunnel_key() helper

Make sure to indicate to tunnel driver that key.tun_id is set,
otherwise gre won't recognize the metadata.

Fixes: d3aa45ce6b94 ("bpf: add helpers to access tunnel metadata")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/filter.c b/net/core/filter.c
index b4adc96..66500d4 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1528,6 +1528,7 @@ static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5)
 
        info = &md->u.tun_info;
        info->mode = IP_TUNNEL_INFO_TX;
+       info->key.tun_flags = TUNNEL_KEY;
        info->key.tun_id = cpu_to_be64(from->tunnel_id);
        info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4);