[ofa-general] srp_daemon and partitions.

[James Beal]

If this is not the correct list for questions of this nature, would  
someone be so kind as to tell me where people would be interested in  
such a question ?


On 15 Nov 2008, at 10:36, James Beal wrote:

>
> We are currently investigating infiniband and we are so far very  
> impressed with the ease of use of the OFED stack. However we seem to  
> have run into an issue with the srp disc discovery.
>
> We wish to protect the storage from unwanted use. In a fibre channel  
> san environment this would be done in two ways, firstly presentation  
> ( configuring the controller as to which luns each WWN can access )  
> and secondly zoning which is configuring the switches that make the  
> fabric as to which ports can communicate. If we can't do this it  
> would restrict IB to a single use eg as a replacement for fibre  
> switches.
>
> I can't see how to specify to either srp_daemon or ibsrpdm which  
> pkey to use when discovering discs and a quick look at the source  
> code doesn't inspire confidence as I can see pkey=ffff as a string  
> in the code.
>
> I did try the following:
>
> One host with one adapter communicating with DDN controller, with  
> no  access control ( pkeys )
>
> The correct lun information was discovered.
>
> root at isg-dev6:~# ibsrpdm -c
> id_ext  
> = 
> 50001ff3000501f0 
> ,ioc_guid 
> = 
> 50001ff3000501f0 
> ,dgid 
> = 
> fe8000000000000050001ff4000501f0,pkey=ffff,service_id=f0010500f31f0050
>
>
> Access control was reasserted, and can be seen as the lun can no
> longer be discovered.
>
> root at isg-dev6:~# ibsrpdm -c
>
> The device was created by "hand"  with the pkey set to the correct  
> value
>
> echo
> "id_ext 
> = 
> 50001ff3000501f0 
> ,ioc_guid 
> = 
> 50001ff3000501f0 
> ,dgid 
> = 
> fe8000000000000050001ff4000501f0 
> ,pkey=1001,service_id=f0010500f31f0050" > /sys/class/infiniband_srp/  
> srp-mthca0-1/add_target
>
> And the device can be seen.
>
> multipath -ll
> 360001ff001f0dbac01000800000a6a6cdm-0 DDN     ,S2A 9900
> [size=5.2T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][enabled]
> \_ 5:0:0:1 sdb 8:16  [active][ready]
>
>
> So the issue appears to be with ibsrpdm/srp_daemon not allowing the  
> pkey to be set
>
> The following message suggests the same.
>
> user_mad: process ibsrpdm did not enable P_Key index support.
> user_mad:   Documentation/infiniband/user_mad.txt has info on the new
> ABI.
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