From: "Michael S. Tsirkin" Subject: Re: [PATCH] uapi/virtio_scsi: allow overriding CDB/SENSE size Date: Thu, 12 Mar 2015 12:06:05 +0100 Message-ID: <20150312120508-mutt-send-email-mst@redhat.com> References: <20150311141903-mutt-send-email-mst@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20150311141903-mutt-send-email-mst@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: linux-kernel@vger.kernel.org Cc: Paolo Bonzini , qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org On Wed, Mar 11, 2015 at 02:19:03PM +0100, Michael S. Tsirkin wrote: > QEMU wants to use virtio scsi structures with > a different VIRTIO_SCSI_CDB_SIZE/VIRTIO_SCSI_SENSE_SIZE, > let's add ifdefs to allow overriding them. > > Keep the old defines under new names: > VIRTIO_SCSI_CDB_DEFAULT_SIZE/VIRTIO_SCSI_SENSE_DEFAULT_SIZE, > since that's what these values really are: > defaults for cdb/sense size fields. > > Suggested-by: Paolo Bonzini > Signed-off-by: Michael S. Tsirkin > --- Rusty, pls note, if possible I'd like this one merged for 4.0 because it's important for QEMU (which now imports linux headers). > include/uapi/linux/virtio_scsi.h | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > > diff --git a/include/uapi/linux/virtio_scsi.h b/include/uapi/linux/virtio_scsi.h > index 42b9370..cc18ef8 100644 > --- a/include/uapi/linux/virtio_scsi.h > +++ b/include/uapi/linux/virtio_scsi.h > @@ -29,8 +29,16 @@ > > #include > > -#define VIRTIO_SCSI_CDB_SIZE 32 > -#define VIRTIO_SCSI_SENSE_SIZE 96 > +/* Default values of the CDB and sense data size configuration fields */ > +#define VIRTIO_SCSI_CDB_DEFAULT_SIZE 32 > +#define VIRTIO_SCSI_SENSE_DEFAULT_SIZE 96 > + > +#ifndef VIRTIO_SCSI_CDB_SIZE > +#define VIRTIO_SCSI_CDB_SIZE VIRTIO_SCSI_CDB_DEFAULT_SIZE > +#endif > +#ifndef VIRTIO_SCSI_SENSE_SIZE > +#define VIRTIO_SCSI_SENSE_SIZE VIRTIO_SCSI_SENSE_DEFAULT_SIZE > +#endif > > /* SCSI command request, followed by data-out */ > struct virtio_scsi_cmd_req { > -- > MST