mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
30c8bd5aa8
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>
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (c) 2018, Intel Corporation. */
|
|
|
|
#ifndef _FAILOVER_H
|
|
#define _FAILOVER_H
|
|
|
|
#include <linux/netdevice.h>
|
|
|
|
struct failover_ops {
|
|
int (*slave_pre_register)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
int (*slave_register)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
int (*slave_pre_unregister)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
int (*slave_unregister)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
int (*slave_link_change)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
int (*slave_name_change)(struct net_device *slave_dev,
|
|
struct net_device *failover_dev);
|
|
rx_handler_result_t (*slave_handle_frame)(struct sk_buff **pskb);
|
|
};
|
|
|
|
struct failover {
|
|
struct list_head list;
|
|
struct net_device __rcu *failover_dev;
|
|
struct failover_ops __rcu *ops;
|
|
};
|
|
|
|
struct failover *failover_register(struct net_device *dev,
|
|
struct failover_ops *ops);
|
|
void failover_unregister(struct failover *failover);
|
|
int failover_slave_unregister(struct net_device *slave_dev);
|
|
|
|
#endif /* _FAILOVER_H */
|