net/af_packet: support promiscuous

Add promiscuous support to the AF_PACKET PMD.  The underlying Linux
device's IF_PROMISC flag is toggled to enable or disable.

Signed-off-by: Chas Williams <ciwillia@brocade.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index c841ddc..5715dcb 100644 (file)
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -447,6 +447,43 @@ eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
        return 0;
 }
 
+static void
+eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
+{
+       struct ifreq ifr;
+       int s;
+
+       s = socket(PF_INET, SOCK_DGRAM, 0);
+       if (s < 0)
+               return;
+
+       strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
+       if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
+               goto out;
+       ifr.ifr_flags &= mask;
+       ifr.ifr_flags |= flags;
+       if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
+               goto out;
+out:
+       close(s);
+}
+
+static void
+eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
+{
+       struct pmd_internals *internals = dev->data->dev_private;
+
+       eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
+}
+
+static void
+eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
+{
+       struct pmd_internals *internals = dev->data->dev_private;
+
+       eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
+}
+
 static const struct eth_dev_ops ops = {
        .dev_start = eth_dev_start,
        .dev_stop = eth_dev_stop,
@@ -454,6 +491,8 @@ static const struct eth_dev_ops ops = {
        .dev_configure = eth_dev_configure,
        .dev_infos_get = eth_dev_info,
        .mtu_set = eth_dev_mtu_set,
+       .promiscuous_enable = eth_dev_promiscuous_enable,
+       .promiscuous_disable = eth_dev_promiscuous_disable,
        .rx_queue_setup = eth_rx_queue_setup,
        .tx_queue_setup = eth_tx_queue_setup,
        .rx_queue_release = eth_queue_release,