Re: [PATCH] fuse: add fusex filesystem

[Bernd Schubert <bernd@bsbernd.com>]

On 5/12/26 15:08, Amir Goldstein wrote:
> On Tue, May 12, 2026 at 10:18 AM Miklos Szeredi <miklos@szeredi.hu> wrote:
>>
>>> I see no reason for fusex to not support lookup by ".", which is
>>> anyway needed for "reconnect", so a fresh FUSEX_NFS_EXPORT opt-in
>>> for "re-export to NFS" may make more sense.
>>
>> Why add reconnect?  If server supports persistent file handles, and
>> all req's get the file handle, then no state (nodeid) needs to be
>> stored by the server.
>>
> 
> Yes, we are saying the same thing.
> What I am saying is that legacy fuse has FUSE_EXPORT_SUPPORT
> which means server supports lookup of "." which libfuse always enabled
> and then we added FUSE_NO_EXPORT_SUPPORT to opt-out of nfs export.
> 
> I am saying that in FUSEX, lookup "." support is implied.
> And that nfs export should always be opt-in (FUSEX_NFS_EXPORT).

I'm confused here, why do we need lookup of "." without NFS export? And
which file system actually supports lookup of "."?
Shouldn't all that be scratched in favor of LOOKUP_HANDLE?

Thanks,
Bernd