[openib-general] ipoib ipv6 multicast joins, was: multicast code/merge status

[Sean Hefty]

Hal Rosenstock wrote:
>>(*) there are some more issues here which need to be addressed, see
>>for example the "Some SMs don't support send-only yet" weird comment
>>at ipoib_mcast_sendonly_join()
> 
> 
> It's more likely an SA issue but I'm only guessing... It may also be
> historical...

Based on observation, it looks like ipoib joins a couple of IPv6 multicast 
groups with send only membership.  However it changes the join_state from 4 to 1 
(send-only to full member).  This results in the SA trying to create the 
multicast group, only the required MCMemberRecord components have not been set.

I'm not sure if this indicates a serious problem, but I'm guessing not.  The 
join request simply fails and returns an error back to ipoib.  (Which would have 
happened for a send-only join if the group hadn't already been created.)

- Sean