net/tap: add multicast addresses management

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@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/doc/guides/nics/features/tap.ini b/doc/guides/nics/features/tap.ini
index 6c07352..6aa1187 100644 (file)
--- a/doc/guides/nics/features/tap.ini
+++ b/doc/guides/nics/features/tap.ini
@@ -10,6 +10,7 @@ Promiscuous mode     = Y
 Allmulticast mode    = Y
 Basic stats          = Y
 MTU update           = 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 c531feb..0a68481 100644 (file)
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -750,6 +750,18 @@ tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
        return err;
 }
 
+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,
@@ -769,6 +781,7 @@ static const struct eth_dev_ops ops = {
        .allmulticast_disable   = tap_allmulti_disable,
        .mac_addr_set           = tap_mac_set,
        .mtu_set                = tap_mtu_set,
+       .set_mc_addr_list       = tap_set_mc_addr_list,
        .stats_get              = tap_stats_get,
        .stats_reset            = tap_stats_reset,
 };