[Virtio-fs] Is there a way to get NFS and/or NFSoRDMA to play nice with Virtio-FS?

[German Maglione]

On Sun, May 28, 2023 at 3:27 PM Ewen Chan <alpha754293 at hotmail.com> wrote:

> German:
>
> I finally got around to testing this and unfortunately, I am still getting
> the stale file handle error.
>
> Here is the command that I used for virtiofsd (which is embedded inside a
> startup script file in Proxmox).
>
> nohup /usr/lib/kvm/virtiofsd --syslog --daemonize
> --socket-path=/var/run/shared-fs.sock -o source=/export/myfs/ -o cache=none
> &> /dev/null  &
>
> If you have any other suggestions, that would be greatly appreciated.
>
>
Sadly no, since FUSE does not support persistent file handles, I don't
think it would work
(I know the NFsv4 protocol defines volatile file handles, but idk if that
is currently implemented or even if it would solve the problem)

Maybe you could try with a nfs proxy



> Thank you.
>
> Sincerely,
> Ewen
> ------------------------------
> *From:* German Maglione <gmaglione at redhat.com>
> *Sent:* May 14, 2023 1:06 PM
> *To:* Ewen Chan <alpha754293 at hotmail.com>
> *Cc:* virtio-fs at redhat.com <virtio-fs at redhat.com>
> *Subject:* Re: [Virtio-fs] Is there a way to get NFS and/or NFSoRDMA to
> play nice with Virtio-FS?
>
> Hi Ewen,
>
> On Sun, May 14, 2023 at 9:49 AM Ewen Chan <alpha754293 at hotmail.com> wrote:
>
> To Whom It May Concern:
>
> I'm using Proxmox 7.3-4 and I have a CentOS 7.7.1908 VM that's able to
> share data/files via Virtio-FS. That part is working fine.
>
> However, if I try to export that VirtIO-FS "target" as a NFS export,
> whenever my other computers connect to that NFS share, it will say that the
> folders have stale NFS handles.
>
> Is there a way to fix/resolve this?
>
> Here is the output for /etc/exports:
>
> /export *(rw,async,no_root_squash,no_all_squash,no_subtree_check,fsid=4)
>
> I have tried rebooting the clients multiple times, along with
> mounting/unmounting said NFS share and it doesn't appear to make any
> difference.
>
>
> Just to confirm, you want to share a folder using virtiofs with a VM, and
> then that VM running as an NFS server sharing that same folder over nfs, am
> I right?
>
> If that is the case, it's not possible (*) the NFS server requires
> persistent file handles that FUSE does not support.
>
> (*) I'm not sure, but IIRC Miklos said it could work if you disable the
> cache, so you can try running virtiofsd with `--cache=none` (let me know if
> that work).
>
>
>
>
> Your help is greatly appreciated.
>
> Thank you.
>
> Sincerely,
> Ewen
> _______________________________________________
> Virtio-fs mailing list
> Virtio-fs at redhat.com
> https://listman.redhat.com/mailman/listinfo/virtio-fs
>
>
>
> --
> German
>


-- 
German
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/virtio-fs/attachments/20230529/aa855737/attachment-0001.htm>