Vendoring libnetwork 9fc9609b

Cherry-picking fix for #27109

Signed-off-by: Madhu Venugopal <madhu@docker.com>

hack/vendor.sh

@@ -65,7 +65,7 @@ clone git github.com/RackSec/srslog 365bf33cd9acc21ae1c355209865f17228ca534e
 clone git github.com/imdario/mergo 0.2.1
 
 #get libnetwork packages
-clone git github.com/docker/libnetwork 0318eb40366b7f8253797e370353c857b5041fef
+clone git github.com/docker/libnetwork 9fc9609b49d79b8a90ca24e3a63f2a3c09f5e29b
 clone git github.com/docker/go-events afb2b9f2c23f33ada1a22b03651775fdc65a5089
 clone git github.com/armon/go-radix e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 clone git github.com/armon/go-metrics eb0af217e5e9747e41dd5303755356b62d28e3ec

vendor/src/github.com/docker/libnetwork/networkdb/cluster.go

@@ -559,10 +559,6 @@ func (nDB *NetworkDB) bulkSyncNode(networks []string, node string, unsolicited b
 		case <-t.C:
 			logrus.Errorf("Bulk sync to node %s timed out", node)
 		case <-ch:
-			nDB.Lock()
-			delete(nDB.bulkSyncAckTbl, node)
-			nDB.Unlock()
-
 			logrus.Debugf("%s: Bulk sync to node %s took %s", nDB.config.NodeName, node, time.Now().Sub(startTime))
 		}
 		t.Stop()

vendor/src/github.com/docker/libnetwork/networkdb/delegate.go

@@ -318,12 +318,13 @@ func (nDB *NetworkDB) handleBulkSync(buf []byte) {
 
 	// Don't respond to a bulk sync which was not unsolicited
 	if !bsm.Unsolicited {
-		nDB.RLock()
+		nDB.Lock()
 		ch, ok := nDB.bulkSyncAckTbl[bsm.NodeName]
-		nDB.RUnlock()
 		if ok {
 			close(ch)
+			delete(nDB.bulkSyncAckTbl, bsm.NodeName)
 		}
+		nDB.Unlock()
 
 		return
 	}