On Tue, 28 May 2024 at 15:24, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Tue, May 28, 2024 at 02:04:16PM +0200, Christian Brauner wrote: > > Can you please explain how opening an fd based on a handle returned from > > name_to_handle_at() and not using a mount file descriptor for > > open_by_handle_at() would work? > > Same as NFS file handles: > > name_to_handle_at returns a handle that includes a file system > identifier. > > open_by_handle_at looks up the superblock based on that identifier. The open file needs a specific mount, holding the superblock is not sufficient. Thanks, Miklos
