Re: Shepherd request (P83): Multipath TCP: Present Use Cases and an Upstream Future

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Tue, May 22, 2018 at 05:28:42PM CEST, sridhar.samudrala@xxxxxxxxx wrote:
>
>On 5/22/2018 2:08 AM, 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.
>
>Based on Stephen's feedback on earlier patches, i tried to minimize the changes to
>netvsc and only commonize the notifier and the main event handler routine.
>Another complication is that netvsc does part of registration in a delayed workqueue.

:( This kind of degrades the whole efford of having single solution
in "failover" module. I think that common parts, as
netdev_rx_handler_register() and others certainly is should be inside
the common module. This is not a good time to minimize changes. Let's do
the thing properly and fix the netvsc mess now.


>
>It should be possible to move some of the code from net_failover.c to generic
>failover.c in future if Stephen is ok with it.
>
>
>> > 
>> 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.
>
>Not sure which code you are referring to.  I only set IFF_FAILOVER_SLAVE
>in patch 3.

The existing netvsc driver.
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