Re: [Qemu-discuss] No permission to write to a mounted filesystem in a KVM guest

[Alex]

On 10/02/16 11:42, W Forum W wrote:
> Hi,
> Anyone can help??
> Thanks!!
>
> On 02/04/2016 03:47 PM, W Forum W wrote:
> > Hi,
> >
> > I am trying to 'squash' a kvm host filesystem to a kvm guest.
> >
> > My libvirt xml looks like
> > <filesystem type='mount' accessmode='squash'>
> >       <source dir='/data/servers'/>
> >       <target dir='/servers'/>
> > </filesystem>
> >
> > I also tried the accessmode passthrough
> >
> > On the guest I mount the filesystem with
> > mount -t 9p -o trans=virtio,version=9p2000.L /servers /mnt
> >
> > When I try to write a file/directory I always get permission denied
> > but I can read the mounted filesystem normally.
> >
> > I use qemu-kvm from Debian Stretch
> > libvirtd --version
> > libvirtd (libvirt) 1.3.1
> > kvm --version
> > QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5), Copyright (c)
> > 2003-2008 Fabrice Bellard
> > uname -a
> > Linux 4.3.0-1-amd64 #1 SMP Debian 4.3.3-7 (2016-01-19) x86_64 GNU/Linux
> > cat /etc/os-release
> > PRETTY_NAME="Debian GNU/Linux stretch/sid"
> >
> > Is there something I overlook, or do I need to find another solution
> > for sharing host filesystem?
> >
> > Many Thanks!!
Usually squashfs is a read-only filesystem. Not sure how it's supposed 
to work with libvirt though.

--
/--Regards, Alex/