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Re: [Qemu-devel] virtio scsi host draft specification, v3
From: |
Christoph Hellwig |
Subject: |
Re: [Qemu-devel] virtio scsi host draft specification, v3 |
Date: |
Wed, 29 Jun 2011 06:27:50 -0400 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 29, 2011 at 12:23:38PM +0200, Hannes Reinecke wrote:
> The general idea here is that we can support NPIV.
> With NPIV we'll have several scsi_hosts, each of which is assigned a
> different set of LUNs by the array.
> With virtio we need to able to react on LUN remapping on the array
> side, ie we need to be able to issue a 'REPORT LUNS' command and
> add/remove LUNs on the fly. This means we have to expose the
> scsi_host in some way via virtio.
>
> This is impossible with a one-to-one mapping between targets and
> LUNs. The actual bus-level pass-through will be just on the SCSI
> layer, ie 'REPORT LUNS' should be possible. If and how we do a LUN
> remapping internally on the host is a totally different matter.
> Same goes for the transport details; I doubt we will expose all the
> dingy details of the various transports, but rather restrict
> ourselves to an abstract transport.
If we want to support traditional NPIV that's what we have to do.
I still hope we'll see broad SR-IOV support for FC adapters soon,
which would ease all this greatly.
- Re: [Qemu-devel] virtio scsi host draft specification, v3, (continued)
Re: [Qemu-devel] virtio scsi host draft specification, v3, Hannes Reinecke, 2011/06/10
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/10
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Hannes Reinecke, 2011/06/14
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Stefan Hajnoczi, 2011/06/14
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Stefan Hajnoczi, 2011/06/29
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Christoph Hellwig, 2011/06/29
- Re: [Qemu-devel] virtio scsi host draft specification, v3, Hannes Reinecke, 2011/06/29
- Re: [Qemu-devel] virtio scsi host draft specification, v3,
Christoph Hellwig <=
Re: [Qemu-devel] virtio scsi host draft specification, v3, Michael S. Tsirkin, 2011/06/12
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Michael S. Tsirkin, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Christoph Hellwig, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Michael S. Tsirkin, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Christoph Hellwig, 2011/06/29