[openib-general] uDAPL disconnect events

[Arlin Davis]

Jimmy Hill wrote:

> I'm running with the latest OpenIB Gen2 uDAPL code (CMA version) and 
> have encountered a problem with disconnect events. The basic problem 
> is that both sides have to call dat_ep_disconnect in order to break 
> down a connection cleanly. It should be possible for just one side 
> (i.e., client) to call disconnect and the other side wait for and see 
> the disconnect event. That does not appear to be working. It does 
> however work that way in the old reference implementation (as it 
> should). I have code that depends on that functionality and as a 
> result, can not move it to OpenIB Gen2 uDAPL yet. Is this a known problem?

Yes, this is a problem. The uDAPL event should be processed from the 
uCMA event callback. I will work on a fix.

>
> Changing the flag to DAT_CLOSE_GRACEFUL_FLAG does not change the 
> behavior.  The attached copy of dtest.c is still using the default 
> flag value.
>
> I have attached a modified version of the "dtest" test program which 
> demonstrates the problem. The "client" will disconnect and exit 
> cleanly. The "server" will hang waiting for the disconnect event.
>
> thanks,
> jimmy
>
> Jimmy Hill
> jimmy.hill at us.ibm.com <mailto:jimmy.hill at us.ibm.com>
> sobebike at gmail.com <mailto:sobebike at gmail.com>
>
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