Re: [Xen-devel] pvSCSI test

[Kristian Hagsted Rasmussen <kristian@xxxxxxxxxx>]

On Monday, February 9, 2015 07:02, Juergen Gross <jgross@xxxxxxxx> wrote:
> To: Kristian Hagsted Rasmussen; Olaf Hering; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] pvSCSI test

snip

> 
> No, that's okay. The connection between p-dev and the drive is done
> via the target infrastructure.
> 
> Something seems to be wrong with your link in configfs: the target
> seems not to be active. Could you please check the link to be correct?
> Please check whether the pscsi (or iblock) entry is active. This can
> be done via the "ls" command in targetcli for example.
> 

In targetcli, ls returns:

o- / 
.........................................................................................................................
 [...]
  o- backstores 
..............................................................................................................
 [...]
  | o- fileio 
...................................................................................................
 [0 Storage Object]
  | o- iblock 
...................................................................................................
 [0 Storage Object]
  | o- pscsi 
....................................................................................................
 [1 Storage Object]
  | | o- 3:0:0:0 
..............................................................................................
 [/dev/sdb activated]
  | o- rd_dr 
....................................................................................................
 [0 Storage Object]
  | o- rd_mcp 
...................................................................................................
 [0 Storage Object]
  o- ib_srpt 
...........................................................................................................
 [0 Targets]
  o- iscsi 
.............................................................................................................
 [0 Targets]
  o- loopback 
..........................................................................................................
 [0 Targets]
  o- qla2xxx 
...........................................................................................................
 [0 Targets]
  o- tcm_fc 
............................................................................................................
 [0 Targets]

And my script for starting xen-pvscsi is this:

modprobe xen-scsiback
mkdir /sys/kernel/config/target/xen-pvscsi
mkdir -p /sys/kernel/config/target/xen-pvscsi/naa.600140512a981c66/tpgt_0
echo naa.6001405708ab297e > 
/sys/kernel/config/target/xen-pvscsi/naa.600140512a981c66/tpgt_0/nexus
#### pvscsi Target Ports
mkdir -p 
/sys/kernel/config/target/xen-pvscsi/naa.600140512a981c66/tpgt_0/lun/lun_0
ln -s /sys/kernel/config/target/core/pscsi_0/3:0:0:0 
/sys/kernel/config/target/xen-pvscsi/naa.600140512a981c66/tpgt_0/lun/lun_0/xen-pvscsi_port
#### Attributes for pvscsi Target Portal Group
#### Parameters for pvscsi Target Portal Group
echo "3:0:0:0" > 
/sys/kernel/config/target/xen-pvscsi/naa.600140512a981c66/tpgt_0/param/alias

I hope you can spot my error, as I am a little lost right now.

> When I tested the pscsi entry in configfs switched to "active" when I
> linked the xen-pvscsi entry to it.
> 
>> Do I have to manually add the device to xenstore?
> 
> I never did it. :-)
> 
> 
> Juergen
> 
>>
>> If you do not feel for answering more of my questions please feel free to 
>> say so, I am just interested in this work and really look forward to its 
>> inclusion in xen.
>>
>> /Kristian
>>
>>> You are not using pscsi, but iblock. Is that on purpose? I have tested
>>> pscsi and fileio only.
>>>
>>> What does lsscsi tell you after adding the device via targetcli? I
>>> suppose you see a new scsi target you should use instead of 3:0:0:0
>>> (that's what I did in the fileio case).
>>>

I do not see more devices with lsscsi when I add and iBlock devices, however I 
also tested with a fileIO device, this does also not show up in lsscsi. However 
I can get it to show up by making a loopback entry in targetcli, this however 
does not change the outcome of my domain creation.

Best regards Kristian

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