Re: How to allow guest to write on 9p/virtfs shared folder?

[Manuel Reimer <Manuel.Spam@nurfuerspam.de>]

Hello,

I have to add another problem:

I changed "security_model=passthrough" to "security_model=mapped". This 
seems to give me back write permissions. I would prefer "passthrough", 
just as I did before, but this works as a workaround.

Now, If I try to execute a script from the mounted virtfs, then I get 
the following:

-bash: ./test.pl: /usr/bin/perl: bad interpreter: Numerical result out 
of range

If I call the same with "perl ./test.pl", then anything works. If I copy 
the script to somewhere outside of the mounted virtfs, then I can also 
call the script with "./test.pl". What's going on here?

Thanks in advance

Yours

Manuel

On 09/18/2013 08:20 PM, Manuel Reimer wrote:
> Hello,
>
> today, I upgraded my kernel and I seem to have gotten a new kvm backend
> with this.
>
> Now my guest systems are no longer able to write to the host filesystem.
>
> I share the filesystem using the following command to qemu:
>
> -virtfs
> local,id=fsdev0,path=$SHARED,security_model=passthrough,mount_tag=vmshared
>
> and on guest side (fstab):
>
> vmshared /mnt/vmshared 9p
> rw,comment=systemd.automount,trans=virtio,access=any 0 0
>
> Versions:
>
> $ uname -a
> Linux manuelspc 3.11.1-1-ARCH #1 SMP PREEMPT Sat Sep 14 19:30:21 CEST
> 2013 x86_64 GNU/Linux
> $ qemu-system-x86_64 --version
> QEMU emulator version 1.5.2, Copyright (c) 2003-2008 Fabrice Bellard
>
> Can someone please help me to get back my writing permissions?
>
> Thank you in advance
>
> Yours
>
> Manuel
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>