On Tue, Aug 27, 2024 at 01:41:08AM +0000, Hongbo Li wrote:

Many mainstream file systems already support the GETVERSION ioctl,
and their implementations are completely the same, essentially
just obtain the value of i_generation. We think this ioctl can be
implemented at the VFS layer, so the file systems do not need to
implement it individually.

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>

Nope. No. Definitely not.

I definitely do not want unprivileged users to be able to construct
arbitrary file handles in userspace.....

-Dave.
-- 
Dave Chinner
david@fromorbit.com