From 0b0d5085f72bbd7256a8ee226cc44efc517d94fd Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 25 Jun 2010 13:42:14 +0200 Subject: block: Fix virtual media change for if=none BlockDriverState member removable controls whether virtual media change (monitor commands change, eject) is allowed. It is set when the "type hint" is BDRV_TYPE_CDROM or BDRV_TYPE_FLOPPY. The type hint is only set by drive_init(). It sets BDRV_TYPE_FLOPPY for if=floppy. It sets BDRV_TYPE_CDROM for media=cdrom and if=ide, scsi, xen, or none. if=ide and if=scsi work, because the type hint makes it a CD-ROM. if=xen likewise, I think. For the same reason, if=none works when it's used by ide-drive or scsi-disk. For other guest devices, there are problems: * fdc: you can't change virtual media $ qemu [...] -drive if=none,id=foo,... -global isa-fdc.driveA=foo QEMU 0.12.50 monitor - type 'help' for more information (qemu) eject foo Device 'foo' is not removable unless you add media=cdrom, but that makes it readonly. * virtio: if you add media=cdrom, you can change virtual media. If you eject, the guest gets I/O errors. If you change, the guest sees the drive's contents suddenly change. * scsi-generic: if you add media=cdrom, you can change virtual media. I didn't test what that does to the guest or the physical device, but it can't be pretty. Signed-off-by: Markus Armbruster Signed-off-by: Kevin Wolf --- hw/scsi-generic.c | 1 + 1 file changed, 1 insertion(+) (limited to 'hw/scsi-generic.c') diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c index 79347f4a67..3915e7844e 100644 --- a/hw/scsi-generic.c +++ b/hw/scsi-generic.c @@ -509,6 +509,7 @@ static int scsi_generic_initfn(SCSIDevice *dev) DPRINTF("block size %d\n", s->qdev.blocksize); s->driver_status = 0; memset(s->sensebuf, 0, sizeof(s->sensebuf)); + bdrv_set_removable(s->bs, 0); return 0; } -- cgit v1.2.3