Missing VLAN netlink attribute should be interpreted as exact match
of no VLAN tag, instead of wildcarded match for all VLAN tags.

Bug #18736.

Signed-off-by: Andy Zhou <az...@nicira.com>

---
v1->v2
        *Remove the fix for in_port.
        *Always set VLAN_TAG_PRESENT bit in the mask.
---
 datapath/flow.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/datapath/flow.c b/datapath/flow.c
index 7f69538..eed841c 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -225,6 +225,12 @@ static bool ovs_match_validate(const struct sw_flow_match 
*match,
                return false;
        }
 
+       if (match->mask &&
+               !(match->mask->key.eth.tci & htons(VLAN_TAG_PRESENT))) {
+                       OVS_NLERR("VLAN present bit can not be wildcarded.\n");
+                       match->mask->key.eth.tci |= htons(VLAN_TAG_PRESENT);
+       }
+
        return true;
 }
 
@@ -1373,7 +1379,8 @@ static int ovs_key_from_nlattrs(struct sw_flow_match 
*match,  u64 attrs,
 
                SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
                attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
-       }
+       } else if (!is_mask)
+               SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
 
        if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
                __be16 eth_type;
-- 
1.7.9.5

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