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authorSridhar Samudrala <sridhar.samudrala@intel.com>2018-05-24 09:55:13 -0700
committerDavid S. Miller <davem@davemloft.net>2018-05-28 22:59:54 -0400
commit30c8bd5aa8b2c78546c3e52337101b9c85879320 (patch)
tree25da9be5c372249e23b95eeda081fdad34417dc4 /Documentation/networking
parentcb1603948a0b80f27d2525bb7ac0d4bbb3849926 (diff)
net: Introduce generic failover module
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 migration of VMs with direct attached VFs by failing over to the paravirtual datapath when the VF is unplugged. Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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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.