diff options
| author |   Sridhar Samudrala <sridhar.samudrala@intel.com> | 2018-05-24 09:55:15 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-05-28 22:59:54 -0400 |
| commit | cfc80d9a11635404a40199a1c9471c96890f3f74 (patch) | |
| tree | da95be375f932bd726ea4e57a504cd6373fdfc8f /drivers/net/Kconfig | |
| parent | netvsc: refactor notifier/event handling code to use the failover framework (diff) | |
| download | linux-dev-cfc80d9a11635404a40199a1c9471c96890f3f74.tar.xz linux-dev-cfc80d9a11635404a40199a1c9471c96890f3f74.zip | |
net: Introduce net_failover driver
The net_failover driver provides an automated failover mechanism via APIs
to create and destroy a failover master netdev and manages a primary and
standby slave netdevs that get registered via the generic failover
infrastructure.
The failover netdev acts a master device and controls 2 slave devices. The
original paravirtual interface gets registered as 'standby' slave netdev and
a passthru/vf device with the same MAC gets registered as 'primary' slave
netdev. Both 'standby' and 'failover' netdevs are associated with the same
'pci' device. The user accesses the network interface via 'failover' netdev.
The 'failover' netdev chooses 'primary' netdev as default for transmits when
it is available with link up and running.
This can be used by paravirtual drivers to enable an alternate low latency
datapath. It also enables hypervisor controlled live migration of a VM with
direct attached VF 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 'drivers/net/Kconfig')
| -rw-r--r-- | drivers/net/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index a029b27fd002..2cdaff90a9ec 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -510,4 +510,16 @@ config NETDEVSIM To compile this driver as a module, choose M here: the module will be called netdevsim. +config NET_FAILOVER + tristate "Failover driver" + select FAILOVER + help + This provides an automated failover mechanism via APIs to create + and destroy a failover master netdev and manages a primary and + standby slave netdevs that get registered via the generic failover + infrastructure. This can be used by paravirtual drivers to enable + an alternate low latency datapath. It alsoenables live migration of + a VM with direct attached VF by failing over to the paravirtual + datapath when the VF is unplugged. + endif # NETDEVICES |