[libvirt-users] no luck with filesystem storage type [solved]

[Boylan, Ross]

I needed one more option to make it work:
# mount -t 9p /mnt/SASInstaller /mnt/SASInstaller/
mount: wrong fs type, bad option, bad superblock on /mnt/SASInstaller,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

# mount -t 9p -o trans=virtio /mnt/SASInstaller /mnt/SASInstaller

The page you referenced also mentions using -oversion=9p2000.L.  There is some additional info on the versions at
http://landley.net/kdocs/Documentation/filesystems/9p.txt; that  page says .L is the default, while http://wiki.qemu.org/Documentation/9psetup#Starting_the_Guest_using_libvirt says it's .U.  I don't know how to tell which I ended up with.

Thanks for the pointer.
Ross
________________________________________
From: Ján Tomko [jtomko at redhat.com]
Sent: Thursday, March 26, 2015 1:43 AM
To: Boylan, Ross
Cc: libvirt-users at redhat.com
Subject: Re: [libvirt-users] no luck with filesystem storage type

On Thu, Mar 26, 2015 at 01:37:06AM +0000, Boylan, Ross wrote:
> I have a directory on the host that I would like to be visible in the guest/domain.  Using virt-manager I selected the directory, resulting in this configuration:
>     <filesystem type='mount' accessmode='passthrough'>
>       <source dir='/mnt/SASInstaller'/>
>       <target dir='/mnt/SASInstaller'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
>     </filesystem>
> I created the /mnt/SASInstaller manually in the VM.
>
> Nothing shows up.  What am I missing?  Do I need to run something in the VM (running Linux) to make it work?

You need to mount it:

mount -t 9p /mnt/SASInstaller /mnt/SASInstaller

The target 'dir' is not really a directory, it's just a mount tag.

See:
http://wiki.qemu.org/Documentation/9psetup#Starting_the_Guest_using_libvirt

Jan