[PATCH 7/7] hv_netvsc: count multicast packets received

[sthemmin]

From: Stephen Hemminger <sthem...@microsoft.com>

Useful for debugging issues with multicast and SR-IOV to keep track
of number of received multicast packets.

Signed-off-by: Stephen Hemminger <sthem...@microsoft.com>
---
 drivers/net/hyperv/hyperv_net.h |    2 ++
 drivers/net/hyperv/netvsc_drv.c |    9 ++++++++-
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 1d49740..7130bf9 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -649,6 +649,8 @@ struct multi_recv_comp {
 struct netvsc_stats {
        u64 packets;
        u64 bytes;
+       u64 broadcast;
+       u64 multicast;
        struct u64_stats_sync syncp;
 };
 
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 9375d82..52eeb2f 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -705,6 +705,11 @@ int netvsc_recv_callback(struct hv_device *device_obj,
        u64_stats_update_begin(&rx_stats->syncp);
        rx_stats->packets++;
        rx_stats->bytes += packet->total_data_buflen;
+
+       if (skb->pkt_type == PACKET_BROADCAST)
+               ++rx_stats->broadcast;
+       else if (skb->pkt_type == PACKET_MULTICAST)
+               ++rx_stats->multicast;
        u64_stats_update_end(&rx_stats->syncp);
 
        /*
@@ -947,7 +952,7 @@ static struct rtnl_link_stats64 *netvsc_get_stats64(struct 
net_device *net,
                                                            cpu);
                struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats,
                                                            cpu);
-               u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
+               u64 tx_packets, tx_bytes, rx_packets, rx_bytes, rx_multicast;
                unsigned int start;
 
                do {
@@ -960,12 +965,14 @@ static struct rtnl_link_stats64 
*netvsc_get_stats64(struct net_device *net,
                        start = u64_stats_fetch_begin_irq(&rx_stats->syncp);
                        rx_packets = rx_stats->packets;
                        rx_bytes = rx_stats->bytes;
+                       rx_multicast = rx_stats->multicast + 
rx_stats->broadcast;
                } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
 
                t->tx_bytes     += tx_bytes;
                t->tx_packets   += tx_packets;
                t->rx_bytes     += rx_bytes;
                t->rx_packets   += rx_packets;
+               t->multicast    += rx_multicast;
        }
 
        t->tx_dropped   = net->stats.tx_dropped;
-- 
1.7.4.1