[v2,0/4] vhost/scsi: Respond to control queue operations

Message

Bijan Mottahedeh Dec. 4, 2018, 12:48 a.m. UTC

v1 -> v2:

- Use copy_to_iter() to send control queue response

This patch series causes vhost-scsi control queue TMF requests to be
explicitly rejected rather than implicitly ignored in order to prevent
a guest virito-scsi driver to wait indefinitely for a response to a SCSI
TMF request.

In addition, control queue address notification operations
(VIRTIO_SCSI_T_AN_*) get an effective no-op response.

Patch 1/4 implements a control queue handler modeled after the existing
request queue handler.  There is no commonality between the two handlers.

Patch 2/4 factors out the common processing code from the control queue
handler into separate routines.

Patch 3/4 modifies the request handler to use the common processing routines.  

Patch 4/4 uses copy_to_iter() to send back control queue responses.

Bijan Mottahedeh (4):
  vhost/scsi: Respond to control queue operations
  vhost/scsi: Extract common handling code from control queue handler
  vhost/scsi: Use common handling code in request queue handler
  vhost/scsi: Use copy_to_iter() to send control queue response

 drivers/vhost/scsi.c | 426 +++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 330 insertions(+), 96 deletions(-)