Re: [PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev
Greetings All,
Sent: Thursday, October 15, 2020 at 6:25 PM
From: "Peter Krempa" <pkrempa(a)redhat.com>
To: libvir-list(a)redhat.com
Cc: "daggs" <daggs(a)gmx.com>
Subject: [PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev
-drive detects whether a device is a cdrom automatically but we need to
use 'host_cdrom' when using blockdev explicitly. Fix the hostdev code
which was recently converted to -blockdev.
Warning:
I _don't_ have a box with a CDROM handy so this code is not tested in action!
Peter Krempa (6):
qemuProcessCreatePretendCmd: Split up preparation and command building
qemu: hostdev: Prepare definition bits in qemuDomainPrepareHostdev
qemu: Prepare hostdev data which depends on the host state separately
qemuxml2argvmock: Remove mocking of 'virSCSIDeviceGetSgName'
qemu: Detect whether a SCSI hostdev is a cdrom
qemu: Add test cases for 'host_cdrom' blockdev backend via <disk>
I've tested the bellow on libvirt 6.8.0, I wasn't able to get it to work, with the
same entry as the example, e.g.:
<hostdev mode='subsystem' type='scsi' managed='yes'>
<source>
<adapter name='cdrom'/>
<address bus='0' target='0' unit='0'/>
</source>
<readonly/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</hostdev>
I get this error:
error: XML error: SCSI host device doesn't support managed mode.
if I mark the managed as no (like other pci pass-through devices I have in the vm), I get
this error:
error: internal error: Cannot parse adapter 'cdrom'
full machine xml can be found at https://dpaste.com/G32WWAJA2
Dagg.