Re: [PATCH] selftests/bpf: Copy runqslower to OUTPUT directory

[Veronika Kabatova <vkabatov@redhat.com>]

----- Original Message -----
> From: "Andrii Nakryiko" <andrii.nakryiko@gmail.com>
> To: "Jesper Dangaard Brouer" <brouer@redhat.com>
> Cc: "Veronika Kabatova" <vkabatov@redhat.com>, "bpf" <bpf@vger.kernel.org>, "Andrii Nakryiko" <andriin@fb.com>
> Sent: Monday, April 27, 2020 10:18:37 PM
> Subject: Re: [PATCH] selftests/bpf: Copy runqslower to OUTPUT directory
> 
> On Mon, Apr 27, 2020 at 7:03 AM Jesper Dangaard Brouer
> <brouer@redhat.com> wrote:
> >
> > On Mon, 27 Apr 2020 15:29:40 +0200
> > Veronika Kabatova <vkabatov@redhat.com> wrote:
> >
> > > $(OUTPUT)/runqslower makefile target doesn't actually create runqslower
> > > binary in the $(OUTPUT) directory. As lib.mk expects all
> > > TEST_GEN_PROGS_EXTENDED (which runqslower is a part of) to be present in
> > > the OUTPUT directory, this results in an error when running e.g. `make
> > > install`:
> > >
> > > rsync: link_stat "tools/testing/selftests/bpf/runqslower" failed: No
> > >        such file or directory (2)
> > >
> > > Copy the binary into the OUTPUT directory after building it to fix the
> > > error.
> > >
> > > Signed-off-by: Veronika Kabatova <vkabatov@redhat.com>
> > > ---
> >
> 
> Did I miss original patch somewhere on bpf@vger mailing list?..
> 

Sorry about that, it looks like the smtp setup selectively drops external
addresses. I'll send the v2 from my private email account to avoid this
problem until I figure out what's wrong.

> > Looks good to me
> >
> > Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
> >
> > >  tools/testing/selftests/bpf/Makefile | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/tools/testing/selftests/bpf/Makefile
> > > b/tools/testing/selftests/bpf/Makefile
> > > index 7729892e0b04..cb8e7e5b2307 100644
> > > --- a/tools/testing/selftests/bpf/Makefile
> > > +++ b/tools/testing/selftests/bpf/Makefile
> > > @@ -142,6 +142,7 @@ $(OUTPUT)/runqslower: $(BPFOBJ)
> > >       $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower     \
> > >                   OUTPUT=$(SCRATCH_DIR)/ VMLINUX_BTF=$(VMLINUX_BTF)   \
> > >                   BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR)
> > > +     @cp $(SCRATCH_DIR)/runqslower $(OUTPUT)/runqslower
> 
> This should be AND'ed (&&) with $(MAKE) to not attempt copy on failed
> make run. Also in general @cp should be $(Q)cp, but if you use $$ you
> shouldn't need $(Q).
> 
> Also, just use $@ instead of $(OUTPUT)/runqslower:
> 
> cp $(SCRATCH_DIR)/runqslower $@
> 

Sounds reasonable, thanks.

Veronika

> > >
> > >  $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o
> > >  $(BPFOBJ)
> >
> > --
> > Best regards,
> >   Jesper Dangaard Brouer
> >   MSc.CS, Principal Kernel Engineer at Red Hat
> >   LinkedIn: http://www.linkedin.com/in/brouer
> >
> 
>