From 30c8bd5aa8b2c78546c3e52337101b9c85879320 Mon Sep 17 00:00:00 2001 From: Sridhar Samudrala Date: Thu, 24 May 2018 09:55:13 -0700 Subject: 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 Signed-off-by: David S. Miller --- include/linux/netdevice.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux/netdevice.h') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 8452f72087ef..f45b1a4e37ab 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1425,6 +1425,8 @@ struct net_device_ops { * entity (i.e. the master device for bridged veth) * @IFF_MACSEC: device is a MACsec device * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook + * @IFF_FAILOVER: device is a failover master device + * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device */ enum netdev_priv_flags { IFF_802_1Q_VLAN = 1<<0, @@ -1454,6 +1456,8 @@ enum netdev_priv_flags { IFF_PHONY_HEADROOM = 1<<24, IFF_MACSEC = 1<<25, IFF_NO_RX_HANDLER = 1<<26, + IFF_FAILOVER = 1<<27, + IFF_FAILOVER_SLAVE = 1<<28, }; #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN @@ -1482,6 +1486,8 @@ enum netdev_priv_flags { #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED #define IFF_MACSEC IFF_MACSEC #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER +#define IFF_FAILOVER IFF_FAILOVER +#define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE /** * struct net_device - The DEVICE structure. @@ -4336,6 +4342,16 @@ static inline bool netif_is_rxfh_configured(const struct net_device *dev) return dev->priv_flags & IFF_RXFH_CONFIGURED; } +static inline bool netif_is_failover(const struct net_device *dev) +{ + return dev->priv_flags & IFF_FAILOVER; +} + +static inline bool netif_is_failover_slave(const struct net_device *dev) +{ + return dev->priv_flags & IFF_FAILOVER_SLAVE; +} + /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ static inline void netif_keep_dst(struct net_device *dev) { -- cgit v1.2.2