Commit e769fcec authored Oct 03, 2017 by Vishakha Narvekar Committed by David S. Miller Oct 04, 2017

net: 8021q: skip packets if the vlan is down



If the vlan is down, free the packet instead of proceeding with other
processing, or counting it as received.  If vlan interfaces are used
as slaves for bonding, with arp monitoring for connectivity, if the rx
counter is seen to be incrementing, then the bond device will not
observe that the interface is down.

CC: David S. Miller <davem@davemloft.net>
Signed-off-by: Vishakha Narvekar <Vishakha.Narvekar@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 90caccdd

net/8021q/vlan_core.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,12 @@ bool vlan_do_receive(struct sk_buff **skbp)
		if (unlikely(!skb))
		return false;

		if (unlikely(!(vlan_dev->flags & IFF_UP))) {
		kfree_skb(skb);
		*skbp = NULL;
		return false;
		}

		skb->dev = vlan_dev;
		if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) {
		/* Our lower layer thinks this is not local, let's make sure.

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