[dpdk-dev] [PATCH v2 3/6] net/tap: add multicast addresses management

[Pascal Mazon]

A tap netdevice actually receives every packet, without any filtering
whatsoever. There is no need for any multicast address registration
to receive multicast packets.

Signed-off-by: Pascal Mazon <pascal.mazon at 6wind.com>
---
 doc/guides/nics/features/tap.ini |  1 +
 drivers/net/tap/rte_eth_tap.c    | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/doc/guides/nics/features/tap.ini b/doc/guides/nics/features/tap.ini
index dad5a0561087..6878a9b8fd17 100644
--- a/doc/guides/nics/features/tap.ini
+++ b/doc/guides/nics/features/tap.ini
@@ -9,6 +9,7 @@ Jumbo frame          = Y
 Promiscuous mode     = Y
 Allmulticast mode    = Y
 Basic stats          = Y
+Multicast MAC filter = Y
 Speed capabilities   = Y
 Unicast MAC filter   = Y
 Other kdrv           = Y
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index a1ca646305ea..957e57ad3466 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -712,6 +712,18 @@ tap_tx_queue_setup(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
+		     struct ether_addr *mc_addr_set __rte_unused,
+		     uint32_t nb_mc_addr __rte_unused)
+{
+	/*
+	 * Nothing to do actually: the tap has no filtering whatsoever, every
+	 * packet is received.
+	 */
+	return 0;
+}
+
 static const struct eth_dev_ops ops = {
 	.dev_start              = tap_dev_start,
 	.dev_stop               = tap_dev_stop,
@@ -732,6 +744,7 @@ static const struct eth_dev_ops ops = {
 	.mac_addr_remove        = tap_mac_remove,
 	.mac_addr_add           = tap_mac_add,
 	.mac_addr_set           = tap_mac_set,
+	.set_mc_addr_list       = tap_set_mc_addr_list,
 	.stats_get              = tap_stats_get,
 	.stats_reset            = tap_stats_reset,
 };
-- 
2.8.0.rc0