On Wed, Aug 20, 2025 at 11:40:36AM +0200, Christian Brauner wrote:

I meant something like this which should effectively be the same thing
just that we move the burden of having to use two bits completely into
file->f_iocb_flags instead of wasting a file->f_mode bit:

Yeah, that could work.  But I think the double use of f_iocb_flags is
a bit confusing.  Another option at least for this case would be to
have a FOP_ flag, and then check inside the operation if it is supported
for this particular instance.