On 7/10/17 1:27 PM, Daniel Borkmann wrote:
On 07/10/2017 10:12 PM, Yonghong Song wrote:
From: Yonghong Song <yhs@localhost.localdomain>
With latest net-next:
====
clang -nostdinc -isystem
/usr/lib/gcc/x86_64-redhat-linux/6.3.1/include -I./arch/x86/include
-I./arch/x86/include/generated/uapi -I./arch/x86/include/generated
-I./include -I./arch/x86/include/uapi -I./include/uapi
-I./include/generated/uapi -include ./include/linux/kconfig.h
-Isamples/bpf \
-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-Wno-compare-distinct-pointer-types \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
-Wno-unknown-warning-option \
-O2 -emit-llvm -c samples/bpf/tcp_synrto_kern.c -o -| llc
-march=bpf -filetype=obj -o samples/bpf/tcp_synrto_kern.o
samples/bpf/tcp_synrto_kern.c:20:10: fatal error: 'bpf_endian.h' file
not found
^~~~~~~~~~~~~~
1 error generated.
====
net has the same issue.
Add support for ntohl and htonl in
tools/testing/selftests/bpf/bpf_endian.h
and move it to samples/bpf/ directory so that it can used by
both selftests/bpf and samples/bpf. The existing
samples/bpf/bpf_helpers.h
is already used by both.
Signed-off-by: Yonghong Song <y...@fb.com>
---
{tools/testing/selftests => samples}/bpf/bpf_endian.h | 14
++++++++++++++
samples/bpf/Makefile already does:
HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
If needed we should rather extend the sample's Makefile to pull in
bpf_endian.h also for clang generated files, but not the other way
round. It's both kind of messy, but kernel selftests should not need
to include or depend upon some sample code.
Sounds good. I will then move bpf_helpers.h to selftests as well so
samples/bpf will depend on selftests/bpf, but not the other way around.
Other than that looks good to me.
tools/testing/selftests/bpf/Makefile | 3 ++-
2 files changed, 16 insertions(+), 1 deletion(-)
rename {tools/testing/selftests => samples}/bpf/bpf_endian.h (73%)
diff --git a/tools/testing/selftests/bpf/bpf_endian.h
b/samples/bpf/bpf_endian.h
similarity index 73%
rename from tools/testing/selftests/bpf/bpf_endian.h
rename to samples/bpf/bpf_endian.h
index 487cbfb..74af266 100644
--- a/tools/testing/selftests/bpf/bpf_endian.h
+++ b/samples/bpf/bpf_endian.h
@@ -23,11 +23,19 @@
# define __bpf_htons(x) __builtin_bswap16(x)
# define __bpf_constant_ntohs(x) ___constant_swab16(x)
# define __bpf_constant_htons(x) ___constant_swab16(x)
+# define __bpf_ntohl(x) __builtin_bswap32(x)
+# define __bpf_htonl(x) __builtin_bswap32(x)
+# define __bpf_constant_ntohl(x) ___constant_swab32(x)
+# define __bpf_constant_htonl(x) ___constant_swab32(x)
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define __bpf_ntohs(x) (x)
# define __bpf_htons(x) (x)
# define __bpf_constant_ntohs(x) (x)
# define __bpf_constant_htons(x) (x)
+# define __bpf_ntohl(x) (x)
+# define __bpf_htonl(x) (x)
+# define __bpf_constant_ntohl(x) (x)
+# define __bpf_constant_htonl(x) (x)
#else
# error "Fix your compiler's __BYTE_ORDER__?!"
#endif
@@ -38,5 +46,11 @@
#define bpf_ntohs(x) \
(__builtin_constant_p(x) ? \
__bpf_constant_ntohs(x) : __bpf_ntohs(x))
+#define bpf_htonl(x) \
+ (__builtin_constant_p(x) ? \
+ __bpf_constant_htonl(x) : __bpf_htonl(x))
+#define bpf_ntohl(x) \
+ (__builtin_constant_p(x) ? \
+ __bpf_constant_ntohl(x) : __bpf_ntohl(x))
#endif /* __BPF_ENDIAN__ */
diff --git a/tools/testing/selftests/bpf/Makefile
b/tools/testing/selftests/bpf/Makefile
index 2ca51a8..f263c6b 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -8,7 +8,8 @@ ifneq ($(wildcard $(GENHDR)),)
GENFLAGS := -DHAVE_GENHDR
endif
-CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS)
-I../../../include
+CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS)
-I../../../include \
+ -I../../../../samples/bpf
LDLIBS += -lcap -lelf
TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map
test_lpm_map test_progs \
