Re: [Qemu-devel] [PATCHv2 3/4] scsi: clarify sense codes for LUN0 emulation

[Paolo Bonzini <pbonzini@redhat.com>]

On 04/08/2017 10:36, Hannes Reinecke wrote:
> The LUN0 emulation is just that, an emulation for a non-existing
> LUN0. So we should be returning LUN_NOT_SUPPORTED for any request
> coming from any other LUN.
> And we should be aborting unhandled commands with INVALID OPCODE,
> not LUN NOT SUPPORTED.
> 
> Signed-off-by: Hannes Reinecke <hare@suse.com>
> ---
>  hw/scsi/scsi-bus.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
> index 8419c75..79a222f 100644
> --- a/hw/scsi/scsi-bus.c
> +++ b/hw/scsi/scsi-bus.c
> @@ -583,6 +583,11 @@ static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
>  {
>      SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
>  
> +    if (req->lun != 0) {
> +        scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
> +        scsi_req_complete(req, CHECK_CONDITION);
> +        return 0;
> +    }
>      switch (buf[0]) {
>      case REPORT_LUNS:
>          if (!scsi_target_emulate_report_luns(r)) {
> @@ -613,7 +618,7 @@ static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
>      case TEST_UNIT_READY:
>          break;
>      default:
> -        scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
> +        scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
>          scsi_req_complete(req, CHECK_CONDITION);
>          return 0;
>      illegal_request:
> 

I am queuing this one since it's an independent bugfix.

Paolo