path: root/tools/testing/selftests/bpf/Makefile

# SPDX-License-Identifier: GPL-2.0
include ../../../../scripts/Kbuild.include
include ../../../scripts/Makefile.arch

CXX ?= $(CROSS_COMPILE)g++

CURDIR := $(abspath .)
TOOLSDIR := $(abspath ../../..)
LIBDIR := $(TOOLSDIR)/lib
BPFDIR := $(LIBDIR)/bpf
TOOLSINCDIR := $(TOOLSDIR)/include
BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
APIDIR := $(TOOLSINCDIR)/uapi
GENDIR := $(abspath ../../../../include/generated)
GENHDR := $(GENDIR)/autoconf.h

ifneq ($(wildcard $(GENHDR)),)
  GENFLAGS := -DHAVE_GENHDR
endif

CLANG		?= clang
LLVM_OBJCOPY	?= llvm-objcopy
BPF_GCC		?= $(shell command -v bpf-gcc;)
SAN_CFLAGS	?=
CFLAGS += -g -rdynamic -Wall -O2 $(GENFLAGS) $(SAN_CFLAGS)		\
	  -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)		\
	  -I$(TOOLSINCDIR) -I$(APIDIR)					\
	  -Dbpf_prog_load=bpf_prog_test_load				\
	  -Dbpf_load_program=bpf_test_load_program
LDLIBS += -lcap -lelf -lz -lrt -lpthread

# Order correspond to 'make run_tests' order
TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
	test_verifier_log test_dev_cgroup \
	test_sock test_sockmap get_cgroup_id_user test_socket_cookie \
	test_cgroup_storage \
	test_netcnt test_tcpnotify_user test_sysctl \
	test_progs-no_alu32 \
	test_current_pid_tgid_new_ns

# Also test bpf-gcc, if present
ifneq ($(BPF_GCC),)
TEST_GEN_PROGS += test_progs-bpf_gcc
endif

TEST_GEN_FILES =
TEST_FILES = test_lwt_ip_encap.o \
	test_tc_edt.o \
	xsk_prereqs.sh

# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
	test_xdp_redirect.sh \
	test_xdp_meta.sh \
	test_xdp_veth.sh \
	test_offload.py \
	test_sock_addr.sh \
	test_tunnel.sh \
	test_lwt_seg6local.sh \
	test_lirc_mode2.sh \
	test_skb_cgroup_id.sh \
	test_flow_dissector.sh \
	test_xdp_vlan_mode_generic.sh \
	test_xdp_vlan_mode_native.sh \
	test_lwt_ip_encap.sh \
	test_tcp_check_syncookie.sh \
	test_tc_tunnel.sh \
	test_tc_edt.sh \
	test_xdping.sh \
	test_bpftool_build.sh \
	test_bpftool.sh \
	test_bpftool_metadata.sh \
	test_xsk.sh

TEST_PROGS_EXTENDED := with_addr.sh \
	with_tunnels.sh \
	test_xdp_vlan.sh

# Compile but not part of 'make run_tests'
TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
	flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
	test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
	xdpxceiver

TEST_CUSTOM_PROGS = urandom_read

# Emit succinct information message describing current building step
# $1 - generic step name (e.g., CC, LINK, etc);
# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
# $3 - target (assumed to be file); only file name will be emitted;
# $4 - optional extra arg, emitted as-is, if provided.
ifeq ($(V),1)
Q =
msg =
else
Q = @
msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
MAKEFLAGS += --no-print-directory
submake_extras := feature_display=0
endif

# override lib.mk's default rules
OVERRIDE_TARGETS := 1
override define CLEAN
	$(call msg,CLEAN)
	$(Q)$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
	$(Q)$(MAKE) -C bpf_testmod clean
endef

include ../lib.mk

SCRATCH_DIR := $(OUTPUT)/tools
BUILD_DIR := $(SCRATCH_DIR)/build
INCLUDE_DIR := $(SCRATCH_DIR)/include
BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
RESOLVE_BTFIDS := $(BUILD_DIR)/resolve_btfids/resolve_btfids

VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
		     ../../../../vmlinux				\
		     /sys/kernel/btf/vmlinux				\
		     /boot/vmlinux-$(shell uname -r)
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))

# 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
# rule for binaries.
$(notdir $(TEST_GEN_PROGS)						\
	 $(TEST_PROGS)							\
	 $(TEST_PROGS_EXTENDED)						\
	 $(TEST_GEN_PROGS_EXTENDED)					\
	 $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;

$(OUTPUT)/%.o: %.c
	$(call msg,CC,,$@)
	$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@

$(OUTPUT)/%:%.c
	$(call msg,BINARY,,$@)
	$(Q)$(LINK.c) $^ $(LDLIBS) -o $@

$(OUTPUT)/urandom_read: urandom_read.c
	$(call msg,BINARY,,$@)
	$(Q)$(CC) $(LDFLAGS) -o $@ $< $(LDLIBS) -Wl,--build-id=sha1

$(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
	$(call msg,MOD,,$@)
	$(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
	$(Q)$(MAKE) $(submake_extras) -C bpf_testmod
	$(Q)cp bpf_testmod/bpf_testmod.ko $@

$(OUTPUT)/test_stub.o: test_stub.c $(BPFOBJ)
	$(call msg,CC,,$@)
	$(Q)$(CC) -c $(CFLAGS) -o $@ $<

DEFAULT_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool

$(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL)
	$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower	\
		    OUTPUT=$(SCRATCH_DIR)/ VMLINUX_BTF=$(VMLINUX_BTF)   \
		    BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR) &&	\
		    cp $(SCRATCH_DIR)/runqslower $@

$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ)

$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
$(OUTPUT)/test_sock: cgroup_helpers.c
$(OUTPUT)/test_sock_addr: cgroup_helpers.c
$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
$(OUTPUT)/test_sockmap: cgroup_helpers.c
$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
$(OUTPUT)/test_netcnt: cgroup_helpers.c
$(OUTPUT)/test_sock_fields: cgroup_helpers.c
$(OUTPUT)/test_sysctl: cgroup_helpers.c

BPFTOOL ?= $(DEFAULT_BPFTOOL)
$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
		    $(BPFOBJ) | $(BUILD_DIR)/bpftool
	$(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)			       \
		    OUTPUT=$(BUILD_DIR)/bpftool/			       \
		    prefix= DESTDIR=$(SCRATCH_DIR)/ install
	$(Q)mkdir -p $(BUILD_DIR)/bpftool/Documentation
	$(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)	       \
		    -C $(BPFTOOLDIR)/Documentation			       \
		    OUTPUT=$(BUILD_DIR)/bpftool/Documentation/		       \
		    prefix= DESTDIR=$(SCRATCH_DIR)/ install

$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)		       \
	   ../../../include/uapi/linux/bpf.h                                   \
	   | $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
	$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
		    DESTDIR=$(SCRATCH_DIR) prefix= all install_headers

$(BUILD_DIR)/libbpf $(BUILD_DIR)/bpftool $(BUILD_DIR)/resolve_btfids $(INCLUDE_DIR):
	$(call msg,MKDIR,,$@)
	$(Q)mkdir -p $@

$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) | $(BPFTOOL) $(INCLUDE_DIR)
ifeq ($(VMLINUX_H),)
	$(call msg,GEN,,$@)
	$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
else
	$(call msg,CP,,$@)
	$(Q)cp "$(VMLINUX_H)" $@
endif

$(RESOLVE_BTFIDS): $(BPFOBJ) | $(BUILD_DIR)/resolve_btfids	\
		       $(TOOLSDIR)/bpf/resolve_btfids/main.c	\
		       $(TOOLSDIR)/lib/rbtree.c			\
		       $(TOOLSDIR)/lib/zalloc.c			\
		       $(TOOLSDIR)/lib/string.c			\
		       $(TOOLSDIR)/lib/ctype.c			\
		       $(TOOLSDIR)/lib/str_error_r.c
	$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids	\
		OUTPUT=$(BUILD_DIR)/resolve_btfids/ BPFOBJ=$(BPFOBJ)

# Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
#
# Use '-idirafter': Don't interfere with include mechanics except where the
# build would have failed anyways.
define get_sys_includes
$(shell $(1) -v -E - </dev/null 2>&1 \
	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
endef

# Determine target endianness.
IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
			grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)

CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) 			\
	     -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)			\
	     -I$(abspath $(OUTPUT)/../usr/include)

CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
	       -Wno-compare-distinct-pointer-types

$(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
$(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline

$(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h

# Build BPF object using Clang
# $1 - input .c file
# $2 - output .o file
# $3 - CFLAGS
define CLANG_BPF_BUILD_RULE
	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
	$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v3
endef
# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
define CLANG_NOALU32_BPF_BUILD_RULE
	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
	$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v2
endef
# Build BPF object using GCC
define GCC_BPF_BUILD_RULE
	$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
	$(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
endef

SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c

# Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
# $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
# Parameters:
# $1 - test runner base binary name (e.g., test_progs)
# $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
define DEFINE_TEST_RUNNER

TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2