From 7d0d69509a966a5328e4fed7d0a942112d431c35 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/virtio-blk.c | 1 + 1 file changed, 1 insertion(+) (limited to 'hw/virtio-blk.c') diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index 71c5d21e61..f0b3ba5cb1 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -500,6 +500,7 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); register_savevm("virtio-blk", virtio_blk_id++, 2, virtio_blk_save, virtio_blk_load, s); + bdrv_set_removable(s->bs, 0); return &s->vdev; } -- cgit v1.2.3