Re: [PATCH bpf-next v2] selftests/bpf: Store BPF object files with .bpf.o extension

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On Wed, Aug 31, 2022 at 11:39:05PM +0200, Daniel Borkmann wrote:
> On 8/30/22 7:55 PM, Daniel Müller wrote:
> [...]
> > diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> > index eecad9..787631 100644
> > --- a/tools/testing/selftests/bpf/Makefile
> > +++ b/tools/testing/selftests/bpf/Makefile
> [...]
> > -LINKED_BPF_SRCS := $(patsubst %.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
> > +LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
> >   # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
> >   # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
> > @@ -386,7 +386,7 @@ TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,		\
> >   TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
> >   TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
> >   TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
> > -TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, $$(TRUNNER_BPF_SRCS))
> > +TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))
> >   TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,	\
> >   				 $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
> >   					       $$(TRUNNER_BPF_SRCS)))
> > @@ -416,7 +416,7 @@ endif
> >   # input/output directory combination
> >   ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
> >   $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
> > -$(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o:				\
> > +$(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o:				\
> >   		     $(TRUNNER_BPF_PROGS_DIR)/%.c			\
> >   		     $(TRUNNER_BPF_PROGS_DIR)/*.h			\
> >   		     $$(INCLUDE_DIR)/vmlinux.h				\
> > @@ -426,22 +426,22 @@ $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o:				\
> >   	$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,			\
> >   					  $(TRUNNER_BPF_CFLAGS))
> > -$(TRUNNER_BPF_SKELS): %.skel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
> > +$(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
> >   	$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
> >   	$(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
> > -	$(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.o=)) > $$@
> > -	$(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.o=)) > $$(@:.skel.h=.subskel.h)
> > +	$(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$@
> > +	$(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$(@:.skel.h=.subskel.h)
> > -$(TRUNNER_BPF_LSKELS): %.lskel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
> > +$(TRUNNER_BPF_LSKELS): %.lskel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
> >   	$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked1.o) $$<
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked2.o) $$(<:.o=.llinked1.o)
> >   	$(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked3.o) $$(<:.o=.llinked2.o)
> >   	$(Q)diff $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
> > -	$(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.o=_lskel)) > $$@
> > +	$(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.bpf.o=_lskel)) > $$@
> >   $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
> >   	$$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.o))
> 
> Should this one also be converted to .bpf.o ?

Thanks for your review. I believe it should. Good catch. Will send an updated
version.

[...]

Thanks,
Daniel



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