[LTP] [RFC PATCH 1/2] tst_test: Add test multiplex function

Jan Stancek jstancek@redhat.com
Wed Mar 6 18:35:44 CET 2019

----- Original Message -----
> Hi!
> > on first look this looks like a workaround, because we have locked
> > ourselves out of .test function for timer tests.
> I do not follow you here, can you elaborate?

If this wasn't timer test, I'd ask why don't we use existing .test and .tcnt,
your test() func can be called with a parameter, so you could change
the code to choose correct syscall/glibc func based on value of that parameter.

For normal tests, this looks almost and .test/.tcnt functionality,
except test count can be also dynamic.

static int tcase = -1;

static void test(void)
   switch (tcase) {

static int select_mpx(void)
    if (tcase == 5)
      return 0;
    return 1;

static struct tst_test test = {
    .test_multiplex = select_mpx,
    .test_all = test,

> This patch has nothing to do with timer tests, it just allows whatever
> the test does to be done several times with a hook to change some
> settings prior to each iteration.
> --
> Cyril Hrubis
> chrubis@suse.cz

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