On Feb 28, 2012, at 3:05 AM, Stefan Hajnoczi wrote:
> The QEMU system emulator now supports the virtio-scsi SCSI transport
> for efficient virtualized SCSI I/O. I would like to support
> virtio-scsi debugging and analysis with pcap.
>
> The pcap data will include the virtio buffers containing SCSI command
> metadata, CDB, and data-out buffer. A similar structure is also used
> for SCSI responses with the data-in buffer and a footer.
>
> You can find detailed information on virtio-scsi in Appendix H of the
> virtio specification:
> http://ozlabs.org/~rusty/virtio-spec/virtio-0.9.4.pdf
OK, so what does a single packet look like? Does each packet correspond to a
single SCSI command or response?
> Is it possible to allocate a datalink type for virtio-scsi?
>
> Do you need a detailed specification of the virtio-scsi pcap mapping
> or should we publish the specification ourselves to enable others to
> easily read such files?
The entry on
http://www.tcpdump.org/linktypes.html
for your link-layer header type should either
1) have a link to one or more specifications that completely describe
the data
or
2) have a link to a page under http://www.tcpdump.org/linktypes that
describes the part of the data that isn't described by such a specification.
If you want to publish the specification yourself, we can just link to it
rather than creating our own http://www.tcpdump.org/linktypes page.-
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