[PATCH bpf-next v3 09/11] selftests: Remove tools/lib/bpf from include path
From: Toke HÃiland-JÃrgensen
Date: Thu Jan 16 2020 - 08:27:52 EST
From: Toke HÃiland-JÃrgensen <toke@xxxxxxxxxx>
To make sure no new files are introduced that doesn't include the bpf/
prefix in its #include, remove tools/lib/bpf from the include path
entirely.
Instead, we introduce a new header files directory under the scratch tools/
dir, and add a rule to run the 'install_headers' rule from libbpf to have a
full set of consistent libbpf headers in $(OUTPUT)/tools/include/bpf, and
then use $(OUTPUT)/tools/include as the include path for selftests.
For consistency we also make sure we put all the scratch build files from
other bpftool and libbpf into tools/build/, so everything stays within
selftests/.
Signed-off-by: Toke HÃiland-JÃrgensen <toke@xxxxxxxxxx>
---
tools/testing/selftests/bpf/.gitignore | 1 +
tools/testing/selftests/bpf/Makefile | 50 +++++++++++++++++++-------------
2 files changed, 31 insertions(+), 20 deletions(-)
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 1d14e3ab70be..849be9990ad2 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -40,3 +40,4 @@ test_cpp
/bpf_gcc
/tools
bpf_helper_defs.h
+/include/bpf
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 1fd7da49bd56..c3fa695bb028 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -20,8 +20,8 @@ CLANG ?= clang
LLC ?= llc
LLVM_OBJCOPY ?= llvm-objcopy
BPF_GCC ?= $(shell command -v bpf-gcc;)
-CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(CURDIR) -I$(APIDIR) -I$(LIBDIR) \
- -I$(BPFDIR) -I$(GENDIR) -I$(TOOLSINCDIR) \
+CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(CURDIR) -I$(APIDIR) \
+ -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) -I$(TOOLSINCDIR) \
-Dbpf_prog_load=bpf_prog_test_load \
-Dbpf_load_program=bpf_test_load_program
LDLIBS += -lcap -lelf -lz -lrt -lpthread
@@ -97,11 +97,15 @@ OVERRIDE_TARGETS := 1
override define CLEAN
$(call msg,CLEAN)
$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
- $(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/ clean
endef
include ../lib.mk
+SCRATCH_DIR := $(OUTPUT)/tools
+BUILD_DIR := $(SCRATCH_DIR)/build
+INCLUDE_DIR := $(SCRATCH_DIR)/include
+INCLUDE_BPF := $(INCLUDE_DIR)/bpf/bpf.h
+
# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
# to build individual tests.
# NOTE: Semicolon at the end is critical to override lib.mk's default static
@@ -120,7 +124,7 @@ $(OUTPUT)/urandom_read: urandom_read.c
$(call msg,BINARY,,$@)
$(CC) -o $@ $< -Wl,--build-id
-$(OUTPUT)/test_stub.o: test_stub.c
+$(OUTPUT)/test_stub.o: test_stub.c $(INCLUDE_BPF)
$(call msg,CC,,$@)
$(CC) -c $(CFLAGS) -o $@ $<
@@ -129,7 +133,7 @@ $(OUTPUT)/runqslower: force
$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower \
OUTPUT=$(CURDIR)/tools/ VMLINUX_BTF=$(abspath ../../../../vmlinux)
-BPFOBJ := $(OUTPUT)/libbpf.a
+BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ)
@@ -155,17 +159,23 @@ force:
DEFAULT_BPFTOOL := $(OUTPUT)/tools/sbin/bpftool
BPFTOOL ?= $(DEFAULT_BPFTOOL)
-$(DEFAULT_BPFTOOL): force
- $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
+$(BUILD_DIR)/libbpf $(BUILD_DIR)/bpftool $(INCLUDE_DIR):
+ $(call msg,MKDIR,,$@)
+ mkdir -p $@
+
+$(DEFAULT_BPFTOOL): force $(BUILD_DIR)/bpftool
+ $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
+ OUTPUT=$(BUILD_DIR)/bpftool/ \
prefix= DESTDIR=$(OUTPUT)/tools/ install
-$(BPFOBJ): force
- $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
+$(BPFOBJ): force $(BUILD_DIR)/libbpf
+ $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \
+ OUTPUT=$(BUILD_DIR)/libbpf/
-BPF_HELPERS := $(OUTPUT)/bpf_helper_defs.h $(wildcard $(BPFDIR)/bpf_*.h)
-$(OUTPUT)/bpf_helper_defs.h: $(BPFOBJ)
- $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \
- OUTPUT=$(OUTPUT)/ $(OUTPUT)/bpf_helper_defs.h
+BPF_HELPERS := $(wildcard $(BPFDIR)/bpf_*.h) $(INCLUDE_BPF)
+$(INCLUDE_BPF): force $(BPFOBJ)
+ $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) install_headers \
+ OUTPUT=$(BUILD_DIR)/libbpf/ DESTDIR=$(SCRATCH_DIR) prefix=
# Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros,
@@ -185,8 +195,8 @@ MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \
- -I$(OUTPUT) -I$(CURDIR) -I$(CURDIR)/include/uapi \
- -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(abspath $(OUTPUT)/../usr/include)
+ -I$(INCLUDE_DIR) -I$(CURDIR) -I$(CURDIR)/include/uapi \
+ -I$(APIDIR) -I$(abspath $(OUTPUT)/../usr/include)
CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
-Wno-compare-distinct-pointer-types
@@ -306,7 +316,7 @@ $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \
$(TRUNNER_EXTRA_HDRS) \
$(TRUNNER_BPF_OBJS) \
$(TRUNNER_BPF_SKELS) \
- $$(BPFOBJ) | $(TRUNNER_OUTPUT)
+ $$(BPFOBJ) $$(INCLUDE_BPF) | $(TRUNNER_OUTPUT)
$$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
cd $$(@D) && $$(CC) $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
@@ -314,7 +324,7 @@ $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o: \
%.c \
$(TRUNNER_EXTRA_HDRS) \
$(TRUNNER_TESTS_HDR) \
- $$(BPFOBJ) | $(TRUNNER_OUTPUT)
+ $$(BPFOBJ) $$(INCLUDE_BPF) | $(TRUNNER_OUTPUT)
$$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
@@ -326,7 +336,7 @@ ifneq ($2,)
endif
$(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS) \
- $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ) \
+ $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ) $$(INCLUDE_BPF) \
| $(TRUNNER_BINARY)-extras
$$(call msg,BINARY,,$$@)
$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
@@ -388,7 +398,7 @@ $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
$(call msg,CXX,,$@)
$(CXX) $(CFLAGS) $^ $(LDLIBS) -o $@
-EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) \
+EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) \
prog_tests/tests.h map_tests/tests.h verifier/tests.h \
feature \
- $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc tools)
+ $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc)