net/hyperv: Add support for promiscuous mode setting

Add code to accept promiscuous mode setting, and pass it to
RNDIS filter.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 43 insertions, 3 deletions

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 93b0e91cbf98..b69c3a4d1e9e 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -56,11 +56,51 @@ static int ring_size = 128;
 module_param(ring_size, int, S_IRUGO);
 MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
 
-/* no-op so the netdev core doesn't return -EINVAL when modifying the the
- * multicast address list in SIOCADDMULTI. hv is setup to get all multicast
- * when it calls RndisFilterOnOpen() */
+struct set_multicast_work {
+        struct work_struct work;
+        struct net_device *net;
+};
+
+static void do_set_multicast(struct work_struct *w)
+{
+        struct set_multicast_work *swk =
+                container_of(w, struct set_multicast_work, work);
+        struct net_device *net = swk->net;
+
+        struct net_device_context *ndevctx = netdev_priv(net);
+        struct netvsc_device *nvdev;
+        struct rndis_device *rdev;
+
+        nvdev = hv_get_drvdata(ndevctx->device_ctx);
+        if (nvdev == NULL)
+                return;
+
+        rdev = nvdev->extension;
+        if (rdev == NULL)
+                return;
+
+        if (net->flags & IFF_PROMISC)
+                rndis_filter_set_packet_filter(rdev,
+                        NDIS_PACKET_TYPE_PROMISCUOUS);
+        else
+                rndis_filter_set_packet_filter(rdev,
+                        NDIS_PACKET_TYPE_BROADCAST |
+                        NDIS_PACKET_TYPE_ALL_MULTICAST |
+                        NDIS_PACKET_TYPE_DIRECTED);
+
+        kfree(w);
+}
+
 static void netvsc_set_multicast_list(struct net_device *net)
 {
+        struct set_multicast_work *swk =
+                kmalloc(sizeof(struct set_multicast_work), GFP_ATOMIC);
+        if (swk == NULL)
+                return;
+
+        swk->net = net;
+        INIT_WORK(&swk->work, do_set_multicast);
+        schedule_work(&swk->work);
 }
 
 static int netvsc_open(struct net_device *net)