Re: [PATCH net-next v11 2/5] netvsc: refactor notifier/event handling code to use the failover framework

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Tue, May 22, 2018 at 03:17:37PM CEST, mst@xxxxxxxxxx wrote:
>On Tue, May 22, 2018 at 03:14:22PM +0200, Jiri Pirko wrote:
>> Tue, May 22, 2018 at 03:12:40PM CEST, mst@xxxxxxxxxx wrote:
>> >On Tue, May 22, 2018 at 11:08:53AM +0200, Jiri Pirko wrote:
>> >> Tue, May 22, 2018 at 11:06:37AM CEST, jiri@xxxxxxxxxxx wrote:
>> >> >Tue, May 22, 2018 at 04:06:18AM CEST, sridhar.samudrala@xxxxxxxxx wrote:
>> >> >>Use the registration/notification framework supported by the generic
>> >> >>failover infrastructure.
>> >> >>
>> >> >>Signed-off-by: Sridhar Samudrala <sridhar.samudrala@xxxxxxxxx>
>> >> >
>> >> >In previous patchset versions, the common code did
>> >> >netdev_rx_handler_register() and netdev_upper_dev_link() etc
>> >> >(netvsc_vf_join()). Now, this is still done in netvsc. Why?
>> >> >
>> >> >This should be part of the common "failover" code.
>> >> >
>> >> 
>> >> Also note that in the current patchset you use IFF_FAILOVER flag for
>> >> master, yet for the slave you use IFF_SLAVE. That is wrong.
>> >> IFF_FAILOVER_SLAVE should be used.
>> >
>> >Or drop IFF_FAILOVER_SLAVE and set both IFF_FAILOVER and IFF_SLAVE?
>> 
>> No. IFF_SLAVE is for bonding.
>
>What breaks if we reuse it for failover?

This is exposed to userspace. IFF_SLAVE is expected for bonding slaves.
And failover slave is not a bonding slave.
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