diff options
| author | Sridhar Samudrala <sridhar.samudrala@intel.com> | 2018-05-24 12:55:13 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-28 22:59:54 -0400 |
| commit | 30c8bd5aa8b2c78546c3e52337101b9c85879320 (patch) | |
| tree | 25da9be5c372249e23b95eeda081fdad34417dc4 /Documentation/networking | |
| parent | cb1603948a0b80f27d2525bb7ac0d4bbb3849926 (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>
Diffstat (limited to 'Documentation/networking')
| -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 @@ | |||
| 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. | ||