DpdkDevice - allow RX queue num which is not power of 2 for non-virtual devices seladb#1340 - (seladb#1343)

Author: lucashc

Pcap++/src/DpdkDevice.cpp

@@ -289,14 +289,24 @@ bool DpdkDevice::configurePort(uint8_t numOfRxQueues, uint8_t numOfTxQueues)
 		return false;
 	}
 
-	// verify num of RX queues is power of 2
-	bool isRxQueuePowerOfTwo = !(numOfRxQueues == 0) && !(numOfRxQueues & (numOfRxQueues - 1));
-	if (!isRxQueuePowerOfTwo)
+	// verify num of RX queues is nonzero
+	if (numOfRxQueues == 0)
 	{
-		PCPP_LOG_ERROR("Num of RX queues must be power of 2 (because of DPDK limitation). Attempted to open device with " << numOfRxQueues << " RX queues");
+		PCPP_LOG_ERROR("Num of RX queues must be nonzero.");
 		return false;
 	}
 
+	// verify num of RX queues is power of 2 for virtual devices
+	if (isVirtual())
+	{
+		bool isRxQueuePowerOfTwo = !(numOfRxQueues & (numOfRxQueues - 1));
+		if (!isRxQueuePowerOfTwo)
+		{
+			PCPP_LOG_ERROR("Num of RX queues must be power of 2 when device is virtual (because of DPDK limitation). Attempted to open device with " << numOfRxQueues << " RX queues");
+			return false;
+		}
+	}
+
 	struct rte_eth_conf portConf;
 	memset(&portConf,0,sizeof(rte_eth_conf));
 #if (RTE_VER_YEAR < 22) || (RTE_VER_YEAR == 22 && RTE_VER_MONTH < 11)