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On Thu, Apr 19, 2018 at 06:42:02PM -0700, Sridhar Samudrala wrote: > +#if IS_ENABLED(CONFIG_NET_FAILOVER) > + > +int failover_create(struct net_device *standby_dev, > + struct failover **pfailover); Should we rename all these structs net_failover? It's possible to extend the concept to storage I think. > +void failover_destroy(struct failover *failover); > + > +int failover_register(struct net_device *standby_dev, struct failover_ops *ops, > + struct failover **pfa...

The main motivation for this patch is to enable cloud service providers to provide an accelerated datapath to virtio-net enabled VMs in a transparent manner with no/minimal guest userspace changes. This also enables hypervisor controlled live migration to be supported with VMs that have direct attached SR-IOV VF devices. Patch 1 introduces a new feature bit VIRTIO_NET_F_STANDBY that can be used

...ggregated stats */ > + struct rtnl_link_stats64 failover_stats; > + > + /* spinlock while updating stats */ > + spinlock_t stats_lock; > +}; > + > +#if IS_ENABLED(CONFIG_NET_FAILOVER) > + > +int failover_create(struct net_device *standby_dev, > + struct failover **pfailover); > +void failover_destroy(struct failover *failover); > + > +int failover_register(struct net_device *standby_dev, struct failover_ops *ops, > + struct failover **pfailover); > +void failover_unregister(struct failover *failover); > + > +int failover_slave_unregister(...

...ggregated stats */ > + struct rtnl_link_stats64 failover_stats; > + > + /* spinlock while updating stats */ > + spinlock_t stats_lock; > +}; > + > +#if IS_ENABLED(CONFIG_NET_FAILOVER) > + > +int failover_create(struct net_device *standby_dev, > + struct failover **pfailover); > +void failover_destroy(struct failover *failover); > + > +int failover_register(struct net_device *standby_dev, struct failover_ops *ops, > + struct failover **pfailover); > +void failover_unregister(struct failover *failover); > + > +int failover_slave_unregister(...

...+ struct rtnl_link_stats64 standby_stats; + + /* aggregated stats */ + struct rtnl_link_stats64 failover_stats; + + /* spinlock while updating stats */ + spinlock_t stats_lock; +}; + +#if IS_ENABLED(CONFIG_NET_FAILOVER) + +int failover_create(struct net_device *standby_dev, + struct failover **pfailover); +void failover_destroy(struct failover *failover); + +int failover_register(struct net_device *standby_dev, struct failover_ops *ops, + struct failover **pfailover); +void failover_unregister(struct failover *failover); + +int failover_slave_unregister(struct net_device *slave_dev); + +#...

...l_link_stats64 failover_stats; >> + >> + /* spinlock while updating stats */ >> + spinlock_t stats_lock; >> +}; >> + >> +#if IS_ENABLED(CONFIG_NET_FAILOVER) >> + >> +int failover_create(struct net_device *standby_dev, >> + struct failover **pfailover); >> +void failover_destroy(struct failover *failover); >> + >> +int failover_register(struct net_device *standby_dev, struct failover_ops *ops, >> + struct failover **pfailover); >> +void failover_unregister(struct failover *failover); >> + >> +in...

This is another update based on feedback from MST and Stephen on the last patchset. Hopefully this series can be integrated and any further enhancements can be made on top of this patchset. v8: - Made the failover managment routines more robust by updating the feature bits/other fields in the failover netdev when slave netdevs are registered/unregistered. (mst) - added support for handling