Re: [LTP] [PATCH 0/3] Add tst_iterate_fd()

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> >  - adds tst_iterate_fd() functionality
> >  - make use of tst_iterate_fd() in readahead01
> >  - add accept03 test which uses tst_iterate_fd()
> >
> > This is a prototype for how the functionality to iterate over different
> > file descriptors should look like it converts one tests and adds
> > another. There is plenty of other syscalls that can use this kind of
> > testing, e.g. all fooat() syscalls where we can pass invalid dir_fd, the
> > plan is to add these if/once we agree on the API.
> 
> I imagine the results of using this with splice could be very interesting.

Good idea, I guess that we need to figure out how to do carthesian
multiplication on the different file descriptors though. Maybe we need
to treat the tst_interate_fd() as an iterator so that we can advance to
the next fd with each call, so that we can do:

	struct tst_fd fd_in = {}, fd_out = {};

	while (tst_iterate_fd(&fd_in)) {
		while (tst_iterate_fd(&fd_out)) {
			...
			TST_TEST(splice(fd_in.fd, 0, fd_out.fd, 0, ...));
			...
		}
	}

-- 
Cyril Hrubis
chrubis@suse.cz