scsi: add support for unit attention conditions

Unit attention conditions override any sense data the device already
has.  Their signaling and clearing is handled entirely by the SCSIBus
code, and they are completely transparent to the SCSIDevices.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/hw/scsi.h b/hw/scsi.h
index 4d5b596a3b..09c3606fa6 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -62,6 +62,7 @@ struct SCSIDevice
     uint32_t id;
     BlockConf conf;
     SCSIDeviceInfo *info;
+    SCSISense unit_attention;
     uint8_t sense[SCSI_SENSE_BUF_SIZE];
     uint32_t sense_len;
     QTAILQ_HEAD(, SCSIRequest) requests;
@@ -105,6 +106,7 @@ struct SCSIBus {
     BusState qbus;
     int busnr;
 
+    SCSISense unit_attention;
     int tcq, ndev;
     const SCSIBusOps *ops;