Hello Gabriel,
On Mon, Oct 16, 2023 at 02:56:55PM -0400, Gabriel Krisman Bertazi wrote:
> Breno Leitao <leitao@xxxxxxxxxx> writes:
>
> > This file will be used by mini_uring.h and allow tests to run without
> > the need of installing liburing to run the tests.
> >
> > This is needed to run io_uring tests in BPF, such as
> > (tools/testing/selftests/bpf/prog_tests/sockopt.c).
> >
> > Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
>
> Can't mini_uring rely on the kernel header like
> selftests/net/io_uring_zerocopy_tx.c does?
Before this patch, io_uring_zerocopy_tx was not relying on "make
headers" headers, as far as I know. I think it was not a problem because
there was no CI running the test, and whoever was running the test was
relying on local io_uring headers.
My patch is, in fact, adding the following flag, which relies on the
headers now on:
+$(OUTPUT)/io_uring_zerocopy_tx: CFLAGS += -I../../../include/
> I ask because this will be the third copy of these
> definitions that we're gonna need to keep in sync (kernel, liburing and
> here). Given this is only used for selftests, we better avoid the
> duplication.
Right, I don't know why this was the suggested way, but, that is how
people are using it.
I can definitely get rid of the copy and do the same mechanism as
io_uring_zerocopy_tx. This is what I've tested, and it worked fine.
---
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 4225f975fce3..9f79a392acc1 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -383,6 +383,8 @@ BPF_CFLAGS = -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \
CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
-Wno-compare-distinct-pointer-types
+HEADER_CFLAGS = -I$(abspath $(OUTPUT)/../../../../usr/include)
+
$(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
$(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
@@ -551,7 +553,7 @@ $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \
$(TRUNNER_BPF_SKELS_LINKED) \
$$(BPFOBJ) | $(TRUNNER_OUTPUT)
$$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
- $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
+ $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) $$(HEADER_CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
