mirror of https://gitee.com/openkylin/linux.git
selftests: Refactor build to remove tools/lib/bpf from include path
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 Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/157952561246.1683545.2762245552022369203.stgit@toke.dk
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@ -29,8 +29,6 @@ test_tcpnotify_user
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test_libbpf
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test_tcp_check_syncookie_user
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test_sysctl
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libbpf.pc
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libbpf.so.*
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test_hashmap
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test_btf_dump
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xdping
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@ -39,4 +37,4 @@ test_cpp
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/no_alu32
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/bpf_gcc
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/tools
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bpf_helper_defs.h
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@ -20,8 +20,8 @@ CLANG ?= clang
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LLC ?= llc
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LLVM_OBJCOPY ?= llvm-objcopy
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BPF_GCC ?= $(shell command -v bpf-gcc;)
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CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(CURDIR) -I$(APIDIR) -I$(LIBDIR) \
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-I$(BPFDIR) -I$(GENDIR) -I$(TOOLSINCDIR) \
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CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(CURDIR) -I$(APIDIR) \
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-I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) -I$(TOOLSINCDIR) \
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-Dbpf_prog_load=bpf_prog_test_load \
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-Dbpf_load_program=bpf_test_load_program
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LDLIBS += -lcap -lelf -lz -lrt -lpthread
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@ -97,11 +97,15 @@ OVERRIDE_TARGETS := 1
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override define CLEAN
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$(call msg,CLEAN)
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$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
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$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/ clean
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endef
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include ../lib.mk
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SCRATCH_DIR := $(OUTPUT)/tools
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BUILD_DIR := $(SCRATCH_DIR)/build
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INCLUDE_DIR := $(SCRATCH_DIR)/include
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BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
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# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
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# to build individual tests.
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# NOTE: Semicolon at the end is critical to override lib.mk's default static
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@ -120,7 +124,7 @@ $(OUTPUT)/urandom_read: urandom_read.c
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$(call msg,BINARY,,$@)
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$(CC) -o $@ $< -Wl,--build-id
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$(OUTPUT)/test_stub.o: test_stub.c
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$(OUTPUT)/test_stub.o: test_stub.c $(BPFOBJ)
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$(call msg,CC,,$@)
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$(CC) -c $(CFLAGS) -o $@ $<
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@ -128,12 +132,10 @@ VMLINUX_BTF_PATHS := $(abspath ../../../../vmlinux) \
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/sys/kernel/btf/vmlinux \
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/boot/vmlinux-$(shell uname -r)
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VMLINUX_BTF:= $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))
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.PHONY: $(OUTPUT)/runqslower
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$(OUTPUT)/runqslower: force
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$(OUTPUT)/runqslower: $(BPFOBJ)
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$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower \
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OUTPUT=$(OUTPUT)/tools/ VMLINUX_BTF=$(VMLINUX_BTF)
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BPFOBJ := $(OUTPUT)/libbpf.a
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OUTPUT=$(SCRATCH_DIR)/ VMLINUX_BTF=$(VMLINUX_BTF) \
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BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR)
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$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ)
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@ -151,25 +153,22 @@ $(OUTPUT)/test_netcnt: cgroup_helpers.c
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$(OUTPUT)/test_sock_fields: cgroup_helpers.c
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$(OUTPUT)/test_sysctl: cgroup_helpers.c
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.PHONY: force
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# force a rebuild of BPFOBJ when its dependencies are updated
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force:
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DEFAULT_BPFTOOL := $(OUTPUT)/tools/sbin/bpftool
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DEFAULT_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool
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BPFTOOL ?= $(DEFAULT_BPFTOOL)
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$(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BUILD_DIR)/bpftool
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$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
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OUTPUT=$(BUILD_DIR)/bpftool/ \
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prefix= DESTDIR=$(SCRATCH_DIR)/ install
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$(DEFAULT_BPFTOOL): force
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$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
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prefix= DESTDIR=$(OUTPUT)/tools/ install
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$(BPFOBJ): $(wildcard $(BPFDIR)/*.c $(BPFDIR)/*.h $(BPFDIR)/Makefile) \
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../../../include/uapi/linux/bpf.h \
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| $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
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$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
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DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
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$(BPFOBJ): force
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$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
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BPF_HELPERS := $(OUTPUT)/bpf_helper_defs.h $(wildcard $(BPFDIR)/bpf_*.h)
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$(OUTPUT)/bpf_helper_defs.h: $(BPFOBJ)
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$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \
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OUTPUT=$(OUTPUT)/ $(OUTPUT)/bpf_helper_defs.h
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$(BUILD_DIR)/libbpf $(BUILD_DIR)/bpftool $(INCLUDE_DIR):
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$(call msg,MKDIR,,$@)
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mkdir -p $@
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# Get Clang's default includes on this system, as opposed to those seen by
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# '-target bpf'. This fixes "missing" files on some architectures/distros,
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@ -189,8 +188,8 @@ MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
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CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
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BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \
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-I$(OUTPUT) -I$(CURDIR) -I$(CURDIR)/include/uapi \
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-I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(abspath $(OUTPUT)/../usr/include)
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-I$(INCLUDE_DIR) -I$(CURDIR) -I$(CURDIR)/include/uapi \
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-I$(APIDIR) -I$(abspath $(OUTPUT)/../usr/include)
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CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
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-Wno-compare-distinct-pointer-types
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@ -279,7 +278,7 @@ $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
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$(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o: \
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$(TRUNNER_BPF_PROGS_DIR)/%.c \
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$(TRUNNER_BPF_PROGS_DIR)/*.h \
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$$(BPF_HELPERS) | $(TRUNNER_OUTPUT)
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$$(BPFOBJ) | $(TRUNNER_OUTPUT)
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$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@, \
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$(TRUNNER_BPF_CFLAGS), \
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$(TRUNNER_BPF_LDFLAGS))
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@ -392,7 +391,7 @@ $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
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$(call msg,CXX,,$@)
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$(CXX) $(CFLAGS) $^ $(LDLIBS) -o $@
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EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) \
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EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) \
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prog_tests/tests.h map_tests/tests.h verifier/tests.h \
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feature \
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$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc tools)
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$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc)
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