Christoph Hellwig wrote:
[had the qemu list address wrong the first time, reply to this message,
not the previous if you were on Cc]
Add support for SG_IO passthru (packet commands) to the virtio-blk
backend. Conceptually based on an older patch from Hannes Reinecke
but largely rewritten to match the code structure and layering in
virtio-blk.
Note that currently we issue the hose SG_IO synchronously. We could
easily switch to async I/O, but that would required either bloating
the VirtIOBlockReq by the size of struct sg_io_hdr or an additional
memory allocation for each SG_IO request.
Signed-off-by: Christoph Hellwig <h...@lst.de>
So practically speaking, what can you do with this? Should we be
handling some SCSI cmds internally to QEMU (like eject operations) and
supporting media=cdrom in -drive for if=virtio?
On a related topic, should we switch /dev/vdX to be /dev/sdX?
Regards,
Anthony Liguori
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