Re: [RFC] VirtFS support on Xen

[Bob Liu <bob.liu@oracle.com>]

Hi Wei,

On 01/21/2016 06:59 PM, Wei Liu wrote:
> On Thu, Jan 21, 2016 at 10:50:08AM +0000, David Vrabel wrote:
>> On 21/01/16 10:28, Wei Liu wrote:
>>> [RFC] VirtFS support on Xen
>>>
>>> # Introduction
>>>
>>> QEMU/KVM supports file system passthrough via an interface called
>>> VirtFS [0]. VirtFS is in turn implemented with 9pfs protocol [1] and
>>> VirtIO transport.
>>>
>>> Xen used to have its own implementation of file system passthrough
>>> called XenFS, but that has been inactive for a few years. The latest
>>> update was in 2009 [2].
>>>
>>> This project aims to add VirtFS support on Xen. This is more
>>> sustainable than inventing our own wheel.#
>>
>> What's the use case for this?  Who wants this feature?
>>
> 
> Anyone who wants file system passthrough.  More specifically, VM-based
> container solutions can share files from host file system.
> 

I'm a bit confused, can't we just use the VirtFS of Qemu?
E.g
./configure --with-extra-qemuu-configure-args="--enable-virtfs"

Thanks,
Bob

> http://xendevsummit2015.sched.org/event/3WDg/xen-containers-better-way-to-run-docker-containers-sainath-grandhi-intel?iframe=no&w=&sidebar=yes&bg=no
> http://xendevsummit2015.sched.org/event/3X1L/hyper-make-vm-run-like-containers-xu-wang-hyper?iframe=no&w=&sidebar=yes&bg=no
> 
> Wei.
>