net: dsa: introduce dsa_is_upstream_port and dsa_switch_is_upstream_of

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In preparation for the new cross-chip notifiers for host addresses,
let's introduce some more topology helpers which we are going to use to
discern switches that are in our path towards the dedicated CPU port
from switches that aren't.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vladimir Oltean 2021-06-29 17:06:48 +03:00 • committed by David S. Miller

parent b117e1e8a8

commit 63609c8fac

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include/net/dsa.h

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