net: ndo_bridge_setlink: Add extack
Drivers may not be able to implement a VLAN addition or reconfiguration. In those cases it's desirable to explain to the user that it was rejected (and why). To that end, add extack argument to ndo_bridge_setlink. Adapt all users to that change. Following patches will use the new argument in the bridge driver. Signed-off-by: NPetr Machata <petrm@mellanox.com> Acked-by: NJiri Pirko <jiri@mellanox.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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