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The current implementation for bridge based interfaces has an issue which is
caused by priority inheritance. We always assumed that the bridge interface will
be created last, but this may not be true in all cases, where some interfaces
will be created "on demand" - e.g. OpenVPN or late (VXLAN, GENEVE).
As we already have a bunch of verify steps in place we should not see a bridge
interface leak to the underlaying infrastructure code. This means, whenever an
interface will be member of a bridge, and the bridge does yet not exist, we will
create it in advance in the interface context, as the bridge code will be run
in the same commit but maybe sooner or later.
This will also be the solution for T2924.
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When removing e.g. a macsec interface and also its associated member interface
from the bridge, it will happen that the macsec interface instance is long gone
before we reach the code in the bridge interface which will remove it from the
bridge itself.
When this is the case, we can not call BridgeIf.del_port() as it will throw an
exception that the interface does not exist. We now only remove a bridge member
if the interface in question is still available in the kernel.
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Commit 29dd5079 ("ifconfig: T2653: remove duplicated code for address flush")
used the class method for address flushing, but it was cvalled in the wrong way.
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Every derived class must implement update() to set the interfaces admin
up/down state. This is required to prevend extensive link flaps when e.g.
reconfiguring bond interfaces.
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The current VyOS CLI parser code written in Python contains a ton of duplicates
which I can also hold myself accountable for - or maybe mainly me - depends on
the angle of judge.
While providing a new update() method in vyos.ifconfig.interfaces() this is
extended for bridge interfaces in the derived bridge class.
Signed-off-by: Christian Poessinger <christian@poessinger.com>
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__init__ should be added to a derived class only if it does work in the ctor.
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