> On Tue, Dec 12, 2023 at 10:10:23AM +0100, Donald Buczek wrote: > > On 12/12/23 06:53, Dave Chinner wrote: > > > > > So can someone please explain to me why we need to try to re-invent > > > a generic filehandle concept in statx when we already have a have > > > working and widely supported user API that provides exactly this > > > functionality? > > > > name_to_handle_at() is fine, but userspace could profit from being > > able to retrieve the filehandle together with the other metadata in a > > single system call. > > Can you say more? What, specifically is the application that would want to do > that, and is it really in such a hot path that it would be a user-visible > improveable, let aloine something that can be actually be measured?
A user space NFS server like Ganesha could benefit from getting attributes and file handle in a single system call. Potentially it could also avoid some of the challenges of using name_to_handle_at that is a privileged operation. Frank
