Re: [Scst-devel] SRPT - mlx4_0 Drive not found

[Curtis <cu...@ti...>]

On 20/10/11 10:58, Ad...@Do... wrote:
> I have enabled this target:
>
> Dmesg outputed:
>
> scst: Using autogenerated rel ID 1 for target ib_srpt_target_0
>
> However, the mlx4_0 driver doesn't even appear as a target. All there is is
> this:
>
> netmanvm1:~# cat
> /sys/kernel/scst_tgt/targets/ib_srpt/ib_srpt_target_0/enabled
> 1

> I have tried to enable it as a target with the IB adapter GUID but it still
> is giving the exact same error.

In the dmesg dump you gave before, you'll see:

ib_srpt: ***WARNING***: Usage of HCA numbers as SCST target names is 
deprecated and will be removed in one of the next versions. It is 
strongly recommended to set use_node_guid_in_target_name parameter in 1 
and update your SCST config file accordingly to use HCAs GUIDs.

This means that the srpt driver will create "ib_srpt_target_N" for each 
HCA in your system.

So, what you're seeing as "ib_srpt_target_0" is the target bound to the 
first IB HCA in your system.  It will NOT show up as "mlx4_0" or 
anything related to the kernel driver for the IB device.

If you set "use_node_guid_in_target_name", it will do as it says, and 
use the GUID instead of the generated name.

> How to I enabled mlx4_0 when it is not appearing as an ib_srpt target?

It _is_ appearing, just not with the name you're expecting.

> When I reboot the server the ib_srpt_target_0 is disabled again. I guess
> this will be fixed once this driver issue is sorted.

You have to enable it on each boot.  It's generally best to configure 
your LUNs and Groups _before_ enabling the target, to avoid giving 
unmasked access to LUNs [albeit for a short time].

Typically, you'd use /etc/scst.conf to retail your desired config, and 
have it loaded on boot.

--
Curtis