net: dsa: reference count the FDB addresses at the cross-chip notifier level

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The same concerns expressed for host MDB entries are valid for host FDBs
just as well:

- in the case of multiple bridges spanning the same switch chip, deleting
  a host FDB entry that belongs to one bridge will result in breakage to
  the other bridge
- not deleting FDB entries across DSA links means that the switch's
  hardware tables will eventually run out, given enough wear&tear

So do the same thing and introduce reference counting for CPU ports and
DSA links using the same data structures as we have for MDB entries.

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 17:06:52 +03:00 • committed by David S. Miller

parent 3dc80afc50

commit 3f6e32f92a

3 changed files with 88 additions and 7 deletions

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include/net/dsa.h

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