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bridge: del external_learned fdbs from device on flush or ageout

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We need to delete from offload the device externally learnded fdbs when any
one of these events happen:

1) Bridge ages out fdb.  (When bridge is doing ageing vs. device doing
ageing.  If device is doing ageing, it would send SWITCHDEV_FDB_DEL
directly).

2) STP state change flushes fdbs on port.

3) User uses sysfs interface to flush fdbs from bridge or bridge port:

	echo 1 >/sys/class/net/BR_DEV/bridge/flush
	echo 1 >/sys/class/net/BR_PORT/brport/flush

4) Offload driver send event SWITCHDEV_FDB_DEL to delete fdb entry.

For rocker, we can now get called to delete fdb entry in wait and nowait
contexts, so set NOWAIT flag when deleting fdb entry.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Scott Feldman
2015-06-14 11:33:11 -07:00
committed by David S. Miller
parent 023033b1ec
commit b4ad7baa01
3 changed files with 20 additions and 10 deletions
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11
Documentation/networking/switchdev.txt
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@@ -251,15 +251,8 @@ out stale FDB entries. To keep an FDB entry "alive", the driver should refresh
the FDB entry by calling call_switchdev_notifiers(SWITCHDEV_FDB_ADD, ...). The
notification will reset the FDB entry's last-used time to now. The driver
should rate limit refresh notifications, for example, no more than once a
second. If the FDB entry expires, ndo_fdb_del is called to remove entry from
the device. XXX: this last part isn't currently correct: ndo_fdb_del isn't
called, so the stale entry remains in device...this need to get fixed.
FDB Flush
^^^^^^^^^
XXX: Unimplemented. Need to support FDB flush by bridge driver for port and
remove both static and learned FDB entries.
second. If the FDB entry expires, fdb_delete is called to remove entry from
the device.
STP State Change on Port
^^^^^^^^^^^^^^^^^^^^^^^^