[PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev

daggs daggs at gmx.com
Thu Oct 22 17:54:10 UTC 2020


Greetings Peter,

> Sent: Tuesday, October 20, 2020 at 2:54 PM
> From: "daggs" <daggs at gmx.com>
> To: "daggs" <daggs at gmx.com>
> Cc: "Peter Krempa" <pkrempa at redhat.com>, libvir-list at redhat.com
> Subject: Re: [PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev
>
> Greetings Peter,
>
> so apparently, the os I'm using in the vm comes with scsi virtio disabled in the kernel...
> will rebuild the os and report.
>
> thanks for all your work.
>
> Dagg.
>

I've built the os with scsi virtio, now I do see the cdrom, see:
# ls -lia /sys/bus/scsi/devices
total 0
   7017 drwxr-xr-x    2 root     root             0 Oct 22  2020 .
   7015 drwxr-xr-x    4 root     root             0 Oct 22  2020 ..
  18874 lrwxrwxrwx    1 root     root             0 Oct 22  2020 0:0:0:0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0/target0:0:0/0:0:0:0
  17468 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0
  18051 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host1 -> ../../../devices/pci0000:00/0000:00:1f.2/ata1/host1
  18099 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host2 -> ../../../devices/pci0000:00/0000:00:1f.2/ata2/host2
  18147 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host3 -> ../../../devices/pci0000:00/0000:00:1f.2/ata3/host3
  18195 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host4 -> ../../../devices/pci0000:00/0000:00:1f.2/ata4/host4
  18243 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host5 -> ../../../devices/pci0000:00/0000:00:1f.2/ata5/host5
  18291 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host6 -> ../../../devices/pci0000:00/0000:00:1f.2/ata6/host6
  18835 lrwxrwxrwx    1 root     root             0 Oct 22  2020 target0:0:0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0/target0:0:0

I've tested with 6.7.0 and 6.8.0 + your patchset, in both the cdrom is visible, in 6.7.0, the guest's dmesg is filled with theses errors:
[   57.510366] sr 0:0:0:0: ioctl_internal_command return code = 8000002
[   57.510400] sr 0:0:0:0: Sense Key : 0xb [current]
[   57.510403] sr 0:0:0:0: ASC=0x0 ASCQ=0x6

every few seconds these lines are added to the log.
with 6.8.0 + your patchset, I see these outputs only few times in the boot process. here is the dmesg: https://dpaste.com/F32A9B92H
I've inserted a audio cd and expected the os ui to detected it but it didn't. I assume there is another bug there.
anything I can do to help hunting this bug?

Thanks.

Dagg.





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