[dpdk-dev] [PATCH v3 2/4] bond mode 4: do not ignore multicast

[Eric Kinzie <ehkinzie@gmail.com>]

From: Eric Kinzie <ekinzie@brocade.com>

The bonding PMD in mode 4 puts all enslaved interfaces into promiscuous
mode in order to receive LACPDUs and must filter unwanted packets
after the traffic has been "collected".  Allow broadcast and multicast
through so that ARP and IPv6 neighbor discovery continue to work.

Fixes: 46fb43683679 ("bond: add mode 4")

Signed-off-by: Eric Kinzie <ehkinzie@gmail.com>
---
 app/test/test_link_bonding_mode4.c     |    7 +++++--
 lib/librte_pmd_bond/rte_eth_bond_pmd.c |    1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/app/test/test_link_bonding_mode4.c b/app/test/test_link_bonding_mode4.c
index 02380f9..5a726af 100644
--- a/app/test/test_link_bonding_mode4.c
+++ b/app/test/test_link_bonding_mode4.c
@@ -755,8 +755,11 @@ test_mode4_rx(void)
 	rte_eth_macaddr_get(test_params.bonded_port_id, &bonded_mac);
 	ether_addr_copy(&bonded_mac, &dst_mac);
 
-	/* Assert that dst address is not bonding address */
-	dst_mac.addr_bytes[0]++;
+	/* Assert that dst address is not bonding address.  Do not set the
+	 * least significant bit of the zero byte as this would create a
+	 * multicast address.
+	 */
+	dst_mac.addr_bytes[0] += 2;
 
 	/* First try with promiscuous mode enabled.
 	 * Add 2 packets to each slave. First with bonding MAC address, second with
diff --git a/lib/librte_pmd_bond/rte_eth_bond_pmd.c b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
index c937e6b..1691300 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_pmd.c
+++ b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
@@ -170,6 +170,7 @@ bond_ethdev_rx_burst_8023ad(void *queue, struct rte_mbuf **bufs,
 			 * mode and packet address does not match. */
 			if (unlikely(hdr->ether_type == ether_type_slow_be ||
 				!collecting || (!promisc &&
+					!is_multicast_ether_addr(&hdr->d_addr) &&
 					!is_same_ether_addr(&bond_mac, &hdr->d_addr)))) {
 
 				if (hdr->ether_type == ether_type_slow_be) {
-- 
1.7.10.4