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uapi/virtio_scsi: allow overriding CDB/SENSE size

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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 <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Michael S. Tsirkin 2015-03-13 11:59:11 +10:30 committed by Rusty Russell
parent 87e7bf1450
commit a4994b810d
1 changed files with 10 additions and 2 deletions
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12
include/uapi/linux/virtio_scsi.h
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@ -29,8 +29,16 @@
#include <linux/virtio_types.h> #include <linux/virtio_types.h>
#define VIRTIO_SCSI_CDB_SIZE 32 /* Default values of the CDB and sense data size configuration fields */
#define VIRTIO_SCSI_SENSE_SIZE 96 #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 */ /* SCSI command request, followed by data-out */
struct virtio_scsi_cmd_req { struct virtio_scsi_cmd_req {