Commit 006da7b0 authored Nov 26, 2013 by Vlad Yasevich Committed by David S. Miller Nov 29, 2013

macvtap: Do not double-count received packets



Currently macvlan will count received packets after calling each
vlans receive handler.   Macvtap attempts to count the packet
yet again when the user reads the packet from the tap socket.
This code doesn't do this consistently either.  Remove the
counting from macvtap and let only macvlan count received
packets.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent dff345c5

drivers/net/macvtap.c

+0 −10

Original line number	Diff line number	Diff line
		@@ -767,7 +767,6 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
		const struct sk_buff *skb,
		const struct iovec *iv, int len)
		{
		struct macvlan_dev *vlan;
		int ret;
		int vnet_hdr_len = 0;
		int vlan_offset = 0;
		@@ -821,15 +820,6 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
		copied += len;

		done:
		rcu_read_lock();
		vlan = rcu_dereference(q->vlan);
		if (vlan) {
		preempt_disable();
		macvlan_count_rx(vlan, copied - vnet_hdr_len, ret == 0, 0);
		preempt_enable();
		}
		rcu_read_unlock();

		return ret ? ret : copied;
		}