datapath: Don't allow flows installed with only TUN_ID.

Tunnel ports now always include full outer IP information, even if
userspace can't understand it.  Since our flows our exact match this
information must also be provided when setting up flows.  Since flows
with only OVS_KEY_ATTR_TUN_ID keys don't contain all of this information
they can never be hit and we should just reject them at setup time.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Kyle Mestery <kmestery@cisco.com>

diff --git a/datapath/flow.c b/datapath/flow.c
index 2acdd05..f33760a 100644 (file)
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -1041,14 +1041,11 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
                if (tun_id != tun_key->tun_id)
                        return -EINVAL;
 
-               memcpy(&swkey->phy.tun.tun_key, tun_key, sizeof(swkey->phy.tun.tun_key));
-               attrs &= ~(1ULL << OVS_KEY_ATTR_TUN_ID);
-               attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
-       } else if (attrs & (1ULL << OVS_KEY_ATTR_TUN_ID)) {
-               swkey->phy.tun.tun_key.tun_id = nla_get_be64(a[OVS_KEY_ATTR_TUN_ID]);
-               swkey->phy.tun.tun_key.tun_flags |= OVS_FLOW_TNL_F_KEY;
+               memcpy(&swkey->phy.tun.tun_key, tun_key,
+                       sizeof(swkey->phy.tun.tun_key));
 
                attrs &= ~(1ULL << OVS_KEY_ATTR_TUN_ID);
+               attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
        } else if (attrs & (1ULL << OVS_KEY_ATTR_IPV4_TUNNEL)) {
                struct ovs_key_ipv4_tunnel *tun_key;
                tun_key = nla_data(a[OVS_KEY_ATTR_IPV4_TUNNEL]);
@@ -1056,7 +1053,9 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
                if (!tun_key->ipv4_dst)
                        return -EINVAL;
 
-               memcpy(&swkey->phy.tun.tun_key, tun_key, sizeof(swkey->phy.tun.tun_key));
+               memcpy(&swkey->phy.tun.tun_key, tun_key,
+                       sizeof(swkey->phy.tun.tun_key));
+
                attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4_TUNNEL);
        }