openvswitch: Add support for matching on OAM packets.

Some tunnel formats have mechanisms for indicating that packets are
OAM frames that should be handled specially (either as high priority or
not forwarded beyond an endpoint). This provides support for allowing
those types of packets to be matched.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 5 deletions

diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index f4c8daa73965..22c855fa0bc2 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -346,6 +346,7 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
                         [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
                         [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
                         [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
+                        [OVS_TUNNEL_KEY_ATTR_OAM] = 0,
                 };
 
                 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
@@ -390,6 +391,9 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
                 case OVS_TUNNEL_KEY_ATTR_CSUM:
                         tun_flags |= TUNNEL_CSUM;
                         break;
+                case OVS_TUNNEL_KEY_ATTR_OAM:
+                        tun_flags |= TUNNEL_OAM;
+                        break;
                 default:
                         return -EINVAL;
                 }
@@ -431,21 +435,24 @@ static int ipv4_tun_to_nlattr(struct sk_buff *skb,
             nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
                 return -EMSGSIZE;
         if (output->ipv4_src &&
-                nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
+            nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
                 return -EMSGSIZE;
         if (output->ipv4_dst &&
-                nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
+            nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
                 return -EMSGSIZE;
         if (output->ipv4_tos &&
-                nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
+            nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
                 return -EMSGSIZE;
         if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
                 return -EMSGSIZE;
         if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
-                nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
+            nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
                 return -EMSGSIZE;
         if ((output->tun_flags & TUNNEL_CSUM) &&
-                nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
+            nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
+                return -EMSGSIZE;
+        if ((output->tun_flags & TUNNEL_OAM) &&
+            nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
                 return -EMSGSIZE;
 
         nla_nest_end(skb, nla);