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lastdragon
2026-09-06 12:53:21 -06:00
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linux-7.2.3/Documentation/networking/failover.rst
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.. SPDX-License-Identifier: GPL-2.0
========
FAILOVER
========
Overview
========
The failover module provides a generic interface for paravirtual drivers
to register a netdev and a set of ops with a failover instance. The ops
are used as event handlers that get called to handle netdev register/
unregister/link change/name change events on slave pci ethernet devices
with the same mac address as the failover netdev.
This enables paravirtual drivers to use a VF as an accelerated low latency
datapath. It also allows live migration of VMs with direct attached VFs by
failing over to the paravirtual datapath when the VF is unplugged.