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net: dsa: Call dsa_untag_bridge_pvid() from dsa_switch_rcv()

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When a DSA switch driver needs to call dsa_untag_bridge_pvid(), it can
set dsa_switch::untag_brige_pvid to indicate this is necessary.

This is a pre-requisite to making sure that we are always calling
dsa_untag_bridge_pvid() after eth_type_trans() has been called.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-10-01 19:42:12 -07:00 committed by David S. Miller
parent c16bcd70a1
commit 1dc0408cdf
2 changed files with 17 additions and 0 deletions
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8
include/net/dsa.h
View File

@ -308,6 +308,14 @@ struct dsa_switch {
*/
bool configure_vlan_while_not_filtering;
/* If the switch driver always programs the CPU port as egress tagged
* despite the VLAN configuration indicating otherwise, then setting
* @untag_bridge_pvid will force the DSA receive path to pop the bridge's
* default_pvid VLAN tagged frames to offer a consistent behavior
* between a vlan_filtering=0 and vlan_filtering=1 bridge device.
*/
bool untag_bridge_pvid;
/* In case vlan_filtering_is_global is set, the VLAN awareness state
* should be retrieved from here and not from the per-port settings.
*/

9
net/dsa/dsa.c
View File

@ -225,6 +225,15 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
skb->pkt_type = PACKET_HOST;
skb->protocol = eth_type_trans(skb, skb->dev);
if (unlikely(cpu_dp->ds->untag_bridge_pvid)) {
nskb = dsa_untag_bridge_pvid(skb);
if (!nskb) {
kfree_skb(skb);
return 0;
}
skb = nskb;
}
s = this_cpu_ptr(p->stats64);
u64_stats_update_begin(&s->syncp);
s->rx_packets++;