net/af_packet: support default MAC address change

Since packet is talking to a network device (probably tap)
it is possible for the device driver to change the hardware address
by making an ioctl to kernel.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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 f5806bf..ae3c25f 100644 (file)
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -19,6 +19,7 @@
 #include <linux/if_packet.h>
 #include <arpa/inet.h>
 #include <net/if.h>
+#include <net/if_arp.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
@@ -468,6 +469,32 @@ eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
        return 0;
 }
 
+static int
+eth_dev_macaddr_set(struct rte_eth_dev *dev, struct rte_ether_addr *addr)
+{
+       struct pmd_internals *internals = dev->data->dev_private;
+       struct ifreq ifr = { };
+       int sockfd = internals->rx_queue[0].sockfd;
+       int ret;
+
+       if (sockfd == -1) {
+               PMD_LOG(ERR, "receive socket not found");
+               return -EINVAL;
+       }
+
+       strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
+       ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+       memcpy(ifr.ifr_hwaddr.sa_data, addr, sizeof(*addr));
+       ret = ioctl(sockfd, SIOCSIFHWADDR, &ifr);
+
+       if (ret < 0) {
+               PMD_LOG_ERRNO(ERR, "ioctl(SIOCSIFHWADDR) failed");
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int
 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
 {
@@ -517,6 +544,7 @@ static const struct eth_dev_ops ops = {
        .dev_close = eth_dev_close,
        .dev_configure = eth_dev_configure,
        .dev_infos_get = eth_dev_info,
+       .mac_addr_set = eth_dev_macaddr_set,
        .mtu_set = eth_dev_mtu_set,
        .promiscuous_enable = eth_dev_promiscuous_enable,
        .promiscuous_disable = eth_dev_promiscuous_disable,