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| author | Sridhar Samudrala | 2018-05-24 18:55:13 +0200 |
|---|---|---|
| committer | David S. Miller | 2018-05-29 04:59:54 +0200 |
| commit | 30c8bd5aa8b2c78546c3e52337101b9c85879320 (patch) | |
| tree | 25da9be5c372249e23b95eeda081fdad34417dc4 /Documentation/networking/failover.rst | |
| parent | vrf: add CRC32c offload to device features (diff) | |
| download | kernel-qcow2-linux-30c8bd5aa8b2c78546c3e52337101b9c85879320.tar.gz kernel-qcow2-linux-30c8bd5aa8b2c78546c3e52337101b9c85879320.tar.xz kernel-qcow2-linux-30c8bd5aa8b2c78546c3e52337101b9c85879320.zip | |
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>
Diffstat (limited to 'Documentation/networking/failover.rst')
| -rw-r--r-- | Documentation/networking/failover.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/networking/failover.rst b/Documentation/networking/failover.rst new file mode 100644 index 000000000000..f0c8483cdbf5 --- /dev/null +++ b/Documentation/networking/failover.rst @@ -0,0 +1,18 @@ +.. 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. |