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Re: [Xen-devel] [PATCH V2 0/4] Add XEN pvSCSI support

On 07/25/2014 07:38 PM, Konrad Rzeszutek Wilk wrote:
On Fri, Jul 25, 2014 at 01:37:29PM +0200, jgross@xxxxxxxx wrote:
This series adds XEN pvSCSI support. With pvSCSI it is possible to use physical
SCSI devices from a XEN domain.

The support consists of a backend in the privileged Domain-0 doing the real
I/O and a frontend in the unprivileged domU passing I/O-requests to the backend.

About the question that Christopher Hellwig asked - was that ever answered?

Sure. That's the first item under "Changes in V2".

The code is taken (and adapted) from the original pvSCSI implementation done
for Linux 2.6 in 2008 by Fujitsu.

[PATCH V2 1/4] Add XEN pvSCSI protocol description
[PATCH V2 2/4] Introduce xen-scsifront module
[PATCH V2 3/4] Introduce XEN scsiback module
[PATCH V2 4/4] add xen pvscsi maintainer

Changes in V2:
- use core target infrastructure by backend instead of pure SCSI passthrough
- add support for larger SG lists by putting them in grant page(s)
- add command abort capability

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