On Thu, Oct 01, 2020 at 07:42:12PM -0700, Florian Fainelli wrote:
> 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.faine...@gmail.com>
> ---
Reviewed-by: Vladimir Oltean <vladimir.olt...@nxp.com>
> include/net/dsa.h | 8 ++++++++
> net/dsa/dsa.c | 9 +++++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index b502a63d196e..8b0696e08cac 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -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.
> */
> diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
> index 5c18c0214aac..dec4ab59b7c4 100644
> --- a/net/dsa/dsa.c
> +++ b/net/dsa/dsa.c
> @@ -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++;
> --
> 2.25.1
>
