It should be like this:
-device usb-bot,id=bot0
-device scsi-{cd,hd},bus=bot0.0,drive=drive0
Libvirt has the code to generate the options for SCSI controllers, but
usb-bot only allows one disk attached to it so it's easier to make it a
<drive> element.
Paolo
Il sab 3 dic 2022, 13:52 Zhipeng Lu <luzhip...@cestc.cn> ha scritto:
> Could you give the detail qemu cmdline about usb-bot?
>
> 在 2022/12/2 17:40, Paolo Bonzini 写道:
> > 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 <luzhip...@cestc.cn> writes:
> >>>
> >>>> From: zhipeng Lu <luzhip...@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 <luzhip...@cestc.cn>
> >>>
> >>> What problem are you trying to solve?
> >>>
> >>>
> >>>
> >>
> >>
> >>
> >
> >
> >
>
>
>
