Re: [PATCH RFC v2] fhandle: expose u64 mount id to name_to_handle_at(2)

On Tue, May 28, 2024 at 11:17:58AM +0200, Christian Brauner wrote:

As I've said earlier, independent of the new handle type returning the
new mount id is useful and needed because it allows the caller to
reliably generate a mount fd for use with open_by_handle_at() via
statmount(). That won't be solved by a new handle type and is racy with
the old mount id. So I intend to accept a version of this patch.

The whole point is that with the fsid in the handle we do not even need
a mount fd for open_by_handle_at.

If you insist on making this interface even more crappy than it is and
create confusion please record my explicit:

Nacked-by: Christoph Hellwig [off-list ref]

in the commit :(