Re: [PATCH] blockdev: add 'media=cdrom' argument to support usb cdrom emulated as cdrom

[Paolo Bonzini]

On 12/2/22 03:26, Zhipeng Lu wrote:
> NAME          MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
> sda             8:0    0  100M  1 disk
> vda           252:0    0   10G  0 disk
> ├─vda1        252:1    0    1G  0 part /boot
> └─vda2        252:2    0    9G  0 part
>    ├─rhel-root 253:0    0    8G  0 lvm  /
>    └─rhel-swap 253:1    0    1G  0 lvm  [SWAP]
> lshw -short|grep cdrom -i
> No cdrom.
>
> My patch is to solve this problem, usb cdrom emulated as cdrom.

This is a libvirt bug, it should use usb-bot instead of usb-storage 
together with -blockdev.  Then it can add a scsi-cd device below usb-bot.

Paolo

> 在 2022/12/1 23:35, Markus Armbruster 写道:
> > luzhipeng <luzhipeng@cestc.cn> writes:
> >
> > > From: zhipeng Lu <luzhipeng@cestc.cn>
> > >
> > > The drive interface supports media=cdrom so that the usb cdrom
> > > can be emulated as cdrom in qemu, but libvirt deprived the drive
> > > interface, so media=cdrom is added to the blockdev interface to
> > > support usb cdrom emulated as cdrom
> > >
> > > Signed-off-by: zhipeng Lu <luzhipeng@cestc.cn>
> >
> > What problem are you trying to solve?