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1 | .. SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | ======== | |
4 | FAILOVER | |
5 | ======== | |
6 | ||
7 | Overview | |
8 | ======== | |
9 | ||
10 | The failover module provides a generic interface for paravirtual drivers | |
11 | to register a netdev and a set of ops with a failover instance. The ops | |
12 | are used as event handlers that get called to handle netdev register/ | |
13 | unregister/link change/name change events on slave pci ethernet devices | |
14 | with the same mac address as the failover netdev. | |
15 | ||
16 | This enables paravirtual drivers to use a VF as an accelerated low latency | |
17 | datapath. It also allows live migration of VMs with direct attached VFs by | |
18 | failing over to the paravirtual datapath when the VF is unplugged. |