[Xen-API] Re: [Xen-devel] [RFC][PATCH] Enhance XenAPI for pvSCSI

[Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>]

Hi Yosuke,

Thanks for your comment.

As Kamada said, the pvSCSI driver emulates some SCSI commands, 
the pvSCSI driver does not always pass through SCSI commands. 
So I hesitate to call pvSCSI "direct". 

Best regards,
 Kan

Fri, 05 Sep 2008 17:52:42 +0900, Yosuke Iwamatsu wrote:

>Hi,
>
>Masaki Kanno wrote:
>> Hi,
>> 
>> I would like to enhance XenAPI for pvSCSI. 
>> At the beginning, I updated only the document of XenAPI.  I'm going 
>> to implement XenAPI of pvSCSI along the document.  Could you comment?
>> 
>> The following classes and RPCs are added by the enhancement. 
>>  Classes:
>>   - VSCSI class
>>      This is a class for virtual SCSI devices.
>
>It's nice to keep xen-api updated with new features :-)
>One thing I want to point out is about the class name.
>I think 'DSCSI' (direct scsi) is appropriate rather than 'VSCSI',
>because pvSCSI driver doesn't really provide virtual scsi luns but
>passes through scsi commands to real scsi luns, as far as I understand.
>
>Regards,
>-- Yosuke Iwamatsu
>
>>   - PSCSI class
>>      This is a class for physical SCSI devices.
>> 
>>  RPCs:
>>   - VSCSI class
>>    -- get_all
>>        A list of all VSCSIs known to the system is gotten.
>>    -- get_uuid
>>        An UUID of the VSCSI is gotten.
>>    -- get_VM
>>        A VM ref of the VSCSI is gotten.
>>    -- get_PSCSI
>>        A PSCSI ref of the VSCSI is gotten.
>>    -- get_virtual_host
>>        A virtual host number of the VSCSI is gotten.
>>    -- get_virtual_channel
>>        A virtual channel number of the VSCSI is gotten.
>>    -- get_virtual_target
>>        A virtual target number of the VSCSI is gotten.
>>    -- get_virtual_lun
>>        A virtual logical unit number of the VSCSI is gotten.
>>    -- get_virtual_HCTL
>>        A virtual HCTL (string of "<host>:<channel>:<target>:<lun>") 
>>        of the VSCSI is gotten.
>>    -- create
>>        A new VSCSI instance is created.
>>    -- destroy
>>        The VSCSI instance is destroyed.
>>    -- get_by_uuid
>>        A VSCSI ref of the UUID is gotten.
>>    -- get_record
>>        A VSCSI record of the VSCSI is gotten.
>> 
>>   - PSCSI class
>>    -- get_all
>>        A list of all PSCSIs known to the system is gotten.
>>    -- get_uuid
>>        An UUID of the PSCSI is gotten.
>>    -- get_host
>>        A host ref of the PSCSI is gotten.
>>    -- get_physical_host
>>        A physical host number of the PSCSI is gotten.
>>    -- get_physical_channel
>>        A physical channel number of the PSCSI is gotten.
>>    -- get_physical_target
>>        A physical target number of the PSCSI is gotten.
>>    -- get_physical_lun
>>        A physical logical unit number of the PSCSI is gotten.
>>    -- get_physical_HCTL
>>        A physical HCTL (string of "<host>:<channel>:<target>:<lun>") 
>>        of the PSCSI is gotten.
>>    -- get_vendor_name
>>        A vendor name of the PSCSI is gotten.
>>    -- get_model
>>        A model name of the PSCSI is gotten.
>>    -- get_type_id
>>        An ID of device types of the PSCSI is gotten. (If disk, the ID 
>>        is 0.  If tape, the ID is 1.)
>>    -- get_type
>>        A device type string of the PSCSI is gotten.
>>    -- get_sg_name
>>        A SCSI generic (sg) device name of the PSCSI is gotten.
>>    -- get_revision
>>        A revision string of the PSCSI is gotten.
>>    -- get_scsi_id
>>        A SCSI ID string of the PSCSI is gotten. The string is a result 
>>        of 'scsi_id -gu -s'.
>>    -- get_scsi_level
>>        A SCSI level of the PSCSI is gotten.
>>    -- get_by_uuid
>>        A PSCSI ref of the UUID is gotten.
>>    -- get_record
>>        A PSCSI record of the PSCSI is gotten.
>> 
>>   - VM class
>>    -- get_VSCSIs
>>        VSCSI refs of the VM are gotten.
>> 
>>   - host class
>>    -- get_PSCSIs
>>        PSCSI refs of the host are gotten.
>> 
>> 
>> Signed-off-by: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
>> 
>> Best regards,
>>  Kan
>> 
>> 
>> ------------------------------------------------------------------------
>> 
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>
>
>
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