Re: Bhyve CD-ROM

I decided to jump down the rabbit hole, and it lead me to something even easier.
I can create a memory disk from the ISO and pass the whole thing to Bhyve as a virtio-blk device.
I can then mount the partition of the block device inside the guest to access its contents:

                file -sL /media/Debian-11.1.0-amd64-DVD-1.iso
                        [...] ISO 9660 CD-ROM filesystem data [...]
                mdconfig -at vnode /media/Debian-11.1.0-amd64-DVD-1.iso
                bhyve -w -H \
                 -s 0,hostbridge \
                 -s 3,virtio-blk,/dev/zvol/zroot/bhyve_vms/debianvm \
                 -s 4,virtio-blk,/dev/md0 \
                 -s 5,virtio-net,tap0 \
                 -s 29,fbuf,tcp=0.0.0.0:5914,w=800,h=600,wait \
                 -s 31,lpc \
                 -l com1,stdio \
                 -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd debianvm

And inside the guest vm:

                fdisk -l
                #       /dev/vdb1 ... Empty
                #       /dev/vdb2 ... EFI (FAT-12/16/32)
                file -sL /dev/vdb1
                #       [...] ISO 9660 CD-ROM filesystem data [...]
                mount /dev/vdb1 /media/
                #       [...] mounted read-only
                ls /media/
                #       [ rom contents ]

Thanks for the tip.

> ----------------------------------------
> From: Sysadmin Lists via virtualization <virtualization@freebsd.org>
> Sent: Tue Nov 30 22:01:17 CET 2021
> To: <virtualization@freebsd.org>, Miroslav Lachman <000.fbsd@quip.cz>, Mario Marietto <marietto2008@gmail.com>
> Cc: Corvin Köhne <C.Koehne@beckhoff.com>
> Subject: Re: Bhyve CD-ROM
> 
> 
> That's a mighty-tempting looking rabbit hole you've got there ....
> 
> > ----------------------------------------
> > From: Miroslav Lachman <000.fbsd@quip.cz>
> > Sent: Tue Nov 30 13:27:32 CET 2021
> > To: <virtualization@freebsd.org>, Mario Marietto <marietto2008@gmail.com>
> > Cc: Corvin Köhne <C.Koehne@beckhoff.com>
> > Subject: Re: Bhyve CD-ROM
> > 
> > If memory serves me right shorting the ISO (any disk device) by some 
> > sectors can be done "on the fly" with gnop utility.
> > Something like gnop create -o <offset> ...
> >
> > Miroslav Lachman


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