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xen-api
Re: [Xen-devel] [RFC][PATCH] Enhance XenAPI for pvSCSI
Hi Iwamatsu-san,
The pvSCSI driver provides virtualized SCSI tree to guest domains.
(You can specify arbitrary IDs (Host:Channel:Target:Lun) mapping
between Dom0 and the guests.)
In addition to that, some SCSI commands, for example REPORT_LUN, may
be emulated on backend driver but simply passthroughed to physical
device.
So, class name 'VSCSI' is appropriate, in my personal opinion.
Best regards,
On Fri, 05 Sep 2008 17:52:42 +0900
Yosuke Iwamatsu <y-iwamatsu@xxxxxxxxxxxxx> 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
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
-----
Jun Kamada
Linux Software Development Div.
Server Systems Unit
Fujitsu Ltd.
kama@xxxxxxxxxxxxxx
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