commit 1cde26f928863d90e9e7c1217880c8450464d305
author Hannes Reinecke <hare@suse.de> Mon May 18 14:41:30 2009 +0200
committer Jens Axboe <jens.axboe@oracle.com> Mon May 18 14:41:30 2009 +0200
tree e0f6e5157cccc8ab8b87b1192a1da6ddc6113e82
parent 6c3b46f74587d46e71b8c2b78fdca626a3aca280

virtio_blk: SG_IO passthru support

Add support for SG_IO passthru to virtio_blk.  We add the scsi command
block after the normal outhdr, and the scsi inhdr with full status
information aswell as the sense buffer before the regular inhdr.

[hch: forward ported, added the VIRTIO_BLK_F_SCSI flags, some comments
 and tested the whole beast]
[axboe: updated to use ->resid and not dual-path the byte count]

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (+ checkpatch.pl tweak)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>