Commit e6652979 authored by Vladimir Oltean's avatar Vladimir Oltean Committed by David S. Miller
Browse files

net: dsa: tag_sja1105: use a custom flow dissector procedure 



The sja1105 is a bit of a special snowflake, in that not all frames are
transmitted/received in the same way. L2 link-local frames are received
with the source port/switch ID information put in the destination MAC
address. For the rest, a tag_8021q header is used. So only the latter
frames displace the rest of the headers and need to use the generic flow
dissector procedure.

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6b04f171

net/dsa/tag_sja1105.c

+11 −0
Original line number Diff line number Diff line
@@ -346,6 +346,16 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb, 
					      is_meta);

}



static void sja1105_flow_dissect(const struct sk_buff *skb, __be16 *proto,

				 int *offset)

{

	/* No tag added for management frames, all ok */

	if (unlikely(sja1105_is_link_local(skb)))

		return;



	dsa_tag_generic_flow_dissect(skb, proto, offset);

}



static const struct dsa_device_ops sja1105_netdev_ops = {

	.name = "sja1105",

	.proto = DSA_TAG_PROTO_SJA1105,
@@ -353,6 +363,7 @@ static const struct dsa_device_ops sja1105_netdev_ops = { 
	.rcv = sja1105_rcv,

	.filter = sja1105_filter,

	.overhead = VLAN_HLEN,

	.flow_dissect = sja1105_flow_dissect,

	.promisc_on_master = true,

};