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linux/net/bridge/br_input.c
Petr Machata 60d6be0931 net: bridge: BROPT_FDB_LOCAL_VLAN_0: Look up FDB on VLAN 0 on miss 
When BROPT_FDB_LOCAL_VLAN_0 is enabled, the local FDB entries for the
member ports as well as the bridge itself should not be created per-VLAN,
but instead only on VLAN 0.

That means that br_handle_frame_finish() needs to make two lookups: the
primary lookup on an appropriate VLAN, and when that misses, a lookup on
VLAN 0.

Have the second lookup only accept local MAC addresses. Turning this into a
generic second-lookup feature is not the goal.

Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/8087475009dce360fb68d873b1ed9c80827da302.1757004393.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-11 19:02:50 -07:00

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