[dpdk-dev] [PATCH] net/virtio-user: specify the MAC of the tap
Ning Li
muziding001 at 163.com
Fri Dec 29 04:38:42 CET 2017
When using virtio-user with vhost-kernel to exchange
packet with kernel networking stack, application can
set the MAC of the tap interface via parameter.
Signed-off-by: Ning Li <muziding001 at 163.com>
---
drivers/net/virtio/virtio_user/vhost_kernel.c | 3 ++-
drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 14 +++++++++++++-
drivers/net/virtio/virtio_user/vhost_kernel_tap.h | 3 ++-
3 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/net/virtio/virtio_user/vhost_kernel.c b/drivers/net/virtio/virtio_user/vhost_kernel.c
index 68d28b1..dd24b6b 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel.c
@@ -380,7 +380,8 @@ struct vhost_memory_kernel {
else
hdr_size = sizeof(struct virtio_net_hdr);
- tapfd = vhost_kernel_open_tap(&dev->ifname, hdr_size, req_mq);
+ tapfd = vhost_kernel_open_tap(&dev->ifname, hdr_size, req_mq,
+ (char *)dev->mac_addr);
if (tapfd < 0) {
PMD_DRV_LOG(ERR, "fail to open tap for vhost kernel");
return -1;
diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index 689a5cf..d036428 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -36,15 +36,19 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <net/if.h>
+#include <net/if_arp.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
+#include <rte_ether.h>
+
#include "vhost_kernel_tap.h"
#include "../virtio_logs.h"
int
-vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq)
+vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
+ const char *mac)
{
unsigned int tap_features;
int sndbuf = INT_MAX;
@@ -123,6 +127,14 @@
PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s",
strerror(errno));
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+ memcpy(ifr.ifr_hwaddr.sa_data, mac, ETHER_ADDR_LEN);
+ if (ioctl(tapfd, SIOCSIFHWADDR, (void *)&ifr) == -1) {
+ PMD_DRV_LOG(ERR, "SIOCSIFHWADDR failed: %s", strerror(errno));
+ goto error;
+ }
+
if (!(*p_ifname))
*p_ifname = strdup(ifr.ifr_name);
diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.h b/drivers/net/virtio/virtio_user/vhost_kernel_tap.h
index eae340c..402f964 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.h
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.h
@@ -64,4 +64,5 @@
/* Constants */
#define PATH_NET_TUN "/dev/net/tun"
-int vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq);
+int vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
+ const char *mac);
--
1.8.3.1
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