scsi: deprecate scsi-disk

It's an old compatibility shim that just delegates to scsi-cd or scsi-hd.
Just like ide-drive, we don't need this.

Acked-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/scsi/scsi-bus.c

@@ -254,8 +254,18 @@ SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
     char *name;
     DeviceState *dev;
     Error *err = NULL;
+    DriveInfo *dinfo;
 
-    driver = blk_is_sg(blk) ? "scsi-generic" : "scsi-disk";
+    if (blk_is_sg(blk)) {
+        driver = "scsi-generic";
+    } else {
+        dinfo = blk_legacy_dinfo(blk);
+        if (dinfo && dinfo->media_cd) {
+            driver = "scsi-cd";
+        } else {
+            driver = "scsi-hd";
+        }
+    }
     dev = qdev_create(&bus->qbus, driver);
     name = g_strdup_printf("legacy[%d]", unit);
     object_property_add_child(OBJECT(bus), name, OBJECT(dev), NULL);

hw/scsi/scsi-disk.c

@@ -2481,6 +2481,9 @@ static void scsi_disk_realize(SCSIDevice *dev, Error **errp)
     DriveInfo *dinfo;
     Error *local_err = NULL;
 
+    warn_report("'scsi-disk' is deprecated, "
+                "please use 'scsi-hd' or 'scsi-cd' instead");
+
     if (!dev->conf.blk) {
         scsi_realize(dev, &local_err);
         assert(local_err);

qemu-deprecated.texi

@@ -259,6 +259,11 @@ their usecases.
 The 'ide-drive' device is deprecated. Users should use 'ide-hd' or
 'ide-cd' as appropriate to get an IDE hard disk or CD-ROM as needed.
 
+@subsection scsi-disk (since 4.2)
+
+The 'scsi-disk' device is deprecated. Users should use 'scsi-hd' or
+'scsi-cd' as appropriate to get a SCSI hard disk or CD-ROM as needed.
+
 @section System emulator machines
 
 @subsection pc-0.12, pc-0.13, pc-0.14 and pc-0.15 (since 4.0)

tests/qemu-iotests/051.pc.out

@@ -167,7 +167,8 @@ QEMU X.Y.Z monitor - type 'help' for more information
 
 Testing: -drive if=none,id=disk -device lsi53c895a -device scsi-disk,drive=disk
 QEMU X.Y.Z monitor - type 'help' for more information
-(qemu) QEMU_PROG: -device scsi-disk,drive=disk: Device needs media, but drive is empty
+(qemu) QEMU_PROG: -device scsi-disk,drive=disk: warning: 'scsi-disk' is deprecated, please use 'scsi-hd' or 'scsi-cd' instead
+QEMU_PROG: -device scsi-disk,drive=disk: Device needs media, but drive is empty
 
 Testing: -drive if=none,id=disk -device lsi53c895a -device scsi-hd,drive=disk
 QEMU X.Y.Z monitor - type 'help' for more information
@@ -238,7 +239,8 @@ QEMU X.Y.Z monitor - type 'help' for more information
 
 Testing: -drive file=TEST_DIR/t.qcow2,if=none,id=disk,readonly=on -device lsi53c895a -device scsi-disk,drive=disk
 QEMU X.Y.Z monitor - type 'help' for more information
-(qemu) quit
+(qemu) QEMU_PROG: -device scsi-disk,drive=disk: warning: 'scsi-disk' is deprecated, please use 'scsi-hd' or 'scsi-cd' instead
+quit
 
 Testing: -drive file=TEST_DIR/t.qcow2,if=none,id=disk,readonly=on -device lsi53c895a -device scsi-hd,drive=disk
 QEMU X.Y.Z monitor - type 'help' for more information