Quinn O'Shea 86eb7e9d62 realtek: dsa: offload 802.1ad bridges
A port that joins an 802.1ad bridge on a switch with the provider role
now takes that role: S-TAGs are parsed, frames are switched on the outer
VID, the VLAN table controls the outer tag and the customer's inner tag
crosses the switch unchanged. Leaving the bridge restores the 802.1Q
role, and enabling the port reapplies its role instead of resetting it.

The bridge protocol is fixed while switch ports are offloaded: a change
is refused through port_vlan_protocol, as mlxsw does, instead of leaving
the hardware on the old protocol. The VLAN table is shared by all
bridges, so a VID belongs to the protocol of the first bridge that adds
a user port to it, and the other protocol is refused until no user port
is left in it.

Switches without the provider role still refuse 802.1ad bridges, now
at join as well, and refuse a change to 802.1ad of a bridge that holds
their ports.

Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Quinn O'Shea <qoshea@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/25927
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
2026-10-16 18:27:00 +02:00
2024-05-17 22:03:06 +03:00
2021-02-05 14:54:47 +01:00

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