linux-kernel - Re: [PATCH 26/29] fuse: add EXPORT_OP_STABLE

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Message-ID: <0d838a5cf271f98ce7158998dd6b1d0a86ea7eb7.camel@kernel.org>
Date: Thu, 15 Jan 2026 14:46:12 -0500
From: Jeff Layton <jlayton@...nel.org>
To: Amir Goldstein <amir73il@...il.com>
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Subject: Re: [PATCH 26/29] fuse: add EXPORT_OP_STABLE_HANDLES flag to export
 operations

On Thu, 2026-01-15 at 19:54 +0100, Amir Goldstein wrote:
> On Thu, Jan 15, 2026 at 6:50 PM Jeff Layton <jlayton@...nel.org> wrote:
> > 
> > Add the EXPORT_OP_STABLE_HANDLES flag to fuse export operations to indicate
> > that this filesystem can be exported via NFS.
> > 
> > Signed-off-by: Jeff Layton <jlayton@...nel.org>
> > ---
> >  fs/fuse/inode.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
> > index 819e50d666224a6201cfc7f450e0bd37bfe32810..1652a98db639fd75e8201b681a29c68b4eab093c 100644
> > --- a/fs/fuse/inode.c
> > +++ b/fs/fuse/inode.c
> > @@ -1208,6 +1208,7 @@ static struct dentry *fuse_get_parent(struct dentry *child)
> >  /* only for fid encoding; no support for file handle */
> >  static const struct export_operations fuse_export_fid_operations = {
> >         .encode_fh      = fuse_encode_fh,
> > +       .flags          = EXPORT_OP_STABLE_HANDLES,
> >  };
> 
> These are used when the server declares FUSE_NO_EXPORT_SUPPORT
> so do not opt in for NFS export.
> 
> The sad thing w.r.t FUSE is that in most likelihood server does not provide
> persistent handles also when it does not declare FUSE_NO_EXPORT_SUPPORT
> but we are stuck with that.
> 
> Thanks,
> Amir.

Thanks, I removed that flag in the patch in my tree.

-- 
Jeff Layton <jlayton@...nel.org>