kernel/linux.git/drivers/net/net_failover.c, branch v4.19.16

failover: Add missing check to validate 'slave_dev' in net_failover_slave_unregister

2018-11-13T19:08:28+00:00

[ Upstream commit 9e7e6cabf371cc008cb2244a04c012b516753693 ] Fixes gcc '-Wunused-but-set-variable' warning: drivers/net/net_failover.c: In function 'net_failover_slave_unregister': drivers/net/net_failover.c:598:35: warning: variable 'primary_dev' set but not used [-Wunused-but-set-variable] There should check the validity of 'slave_dev'. Fixes: cfc80d9a1163 ("net: Introduce net_failover driver") Signed-off-by: YueHaibing Acked-by: Sridhar Samudrala Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

failover: change mtu has RTNL

2018-07-29T19:57:26+00:00

When changing MTU, RTNL is held so use rtnl_dereference instead of rcu_dereference. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

net: allow fallback function to pass netdev

2018-07-09T20:57:25+00:00

For most of these calls we can just pass NULL through to the fallback function as the sb_dev. The only cases where we cannot are the cases where we might be dealing with either an upper device or a driver that would have configured things to support an sb_dev itself. The only driver that has any significant change in this patch set should be ixgbe as we can drop the redundant functionality that existed in both the ndo_select_queue function and the fallback function that was passed through to us. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher

net: allow ndo_select_queue to pass netdev

2018-07-09T20:41:34+00:00

This patch makes it so that instead of passing a void pointer as the accel_priv we instead pass a net_device pointer as sb_dev. Making this change allows us to pass the subordinate device through to the fallback function eventually so that we can keep the actual code in the ndo_select_queue call as focused on possible on the exception cases. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher

net: net_failover: fix typo in net_failover_slave_register()

2018-06-19T22:56:44+00:00

Sync both unicast and multicast lists instead of unicast twice. Fixes: cfc80d9a116 ("net: Introduce net_failover driver") Reviewed-by: Joao Martins Signed-off-by: Liran Alon Signed-off-by: David S. Miller

net_failover: Use netdev_features_t instead of u32

2018-06-04T21:30:04+00:00

The features mask needs to be a netdev_features_t (u64) because a u32 is not big enough. Fixes: cfc80d9a1163 ("net: Introduce net_failover driver") Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller

net: Introduce net_failover driver

2018-05-29T02:59:54+00:00

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 Signed-off-by: David S. Miller