On Mon, 6 Jul 2020 15:17:57 -0700
Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> wrote:
> On Mon, Jul 6, 2020 at 10:00 AM Jesper Dangaard Brouer
> <brouer@xxxxxxxxxx> wrote:
> >
> > There are a number of places in test_progs that use minus-1 as the argument
> > to exit(). This improper use as a process exit status is masked to be a
> > number between 0 and 255 as defined in man exit(3).
>
> nit: I wouldn't call it improper use, as it's a well defined behavior
> (lower byte of returned integer).
>
> >
> > This patch use two different positive exit codes instead, to allow a shell
>
> typo: uses
>
> > script to tell the two error cases apart.
> >
> > Fixes: fd27b1835e70 ("selftests/bpf: Reset process and thread affinity after each test/sub-test")
> > Fixes: 811d7e375d08 ("bpf: selftests: Restore netns after each test")
> > Signed-off-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
> > ---
> > tools/testing/selftests/bpf/test_progs.c | 12 +++++++-----
> > 1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
> > index e8f7cd5dbae4..50803b080593 100644
> > --- a/tools/testing/selftests/bpf/test_progs.c
> > +++ b/tools/testing/selftests/bpf/test_progs.c
> > @@ -12,7 +12,9 @@
> > #include <string.h>
> > #include <execinfo.h> /* backtrace */
> >
> > -#define EXIT_NO_TEST 2
> > +#define EXIT_NO_TEST 2
> > +#define EXIT_ERR_NETNS 3
> > +#define EXIT_ERR_RESET_AFFINITY 4
>
> Let's not overdo this with too granular error codes? All of those seem
> to be just a failure, is there any practical need to differentiate
> between NETNS vs RESET_AFFINITY failure?
I agree, because both cases (NETNS vs RESET_AFFINITY) print to stderr,
which makes it possible to troubleshoot for a human afterwards. The
shell script just need to differentiate that is an "infra" setup issue,
as we e.g. might want to allow the RPM build to continue in those cases.
> I'd go with 3 values:
>
> 1 - at least one test failed
> 2 - no tests were selected
> 3 - "infra" (not a test-specific failure) error (like netns or affinity failed).
>
> Thoughts?
Sure, I can do this.
What define name reflect this best:
EXIT_ERR_SETUP ?
EXIT_ERR_INFRA ?
EXIT_ERR_SETUP_INFRA ?
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
