1# SPDX-License-Identifier: GPL-2.0 2include ../../../../scripts/Kbuild.include 3include ../../../scripts/Makefile.arch 4 5CURDIR := $(abspath .) 6LIBDIR := $(abspath ../../../lib) 7BPFDIR := $(LIBDIR)/bpf 8TOOLSDIR := $(abspath ../../../include) 9APIDIR := $(TOOLSDIR)/uapi 10GENDIR := $(abspath ../../../../include/generated) 11GENHDR := $(GENDIR)/autoconf.h 12 13ifneq ($(wildcard $(GENHDR)),) 14 GENFLAGS := -DHAVE_GENHDR 15endif 16 17CLANG ?= clang 18LLC ?= llc 19LLVM_OBJCOPY ?= llvm-objcopy 20BPF_GCC ?= $(shell command -v bpf-gcc;) 21CFLAGS += -g -Wall -O2 $(GENFLAGS) -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) \ 22 -I$(GENDIR) -I$(TOOLSDIR) -I$(CURDIR) \ 23 -Dbpf_prog_load=bpf_prog_test_load \ 24 -Dbpf_load_program=bpf_test_load_program 25LDLIBS += -lcap -lelf -lrt -lpthread 26 27# Order correspond to 'make run_tests' order 28TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \ 29 test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \ 30 test_sock test_btf test_sockmap get_cgroup_id_user test_socket_cookie \ 31 test_cgroup_storage test_select_reuseport \ 32 test_netcnt test_tcpnotify_user test_sock_fields test_sysctl test_hashmap \ 33 test_cgroup_attach test_progs-no_alu32 34 35# Also test bpf-gcc, if present 36ifneq ($(BPF_GCC),) 37TEST_GEN_PROGS += test_progs-bpf_gcc 38endif 39 40TEST_GEN_FILES = 41TEST_FILES = test_lwt_ip_encap.o \ 42 test_tc_edt.o 43 44# Order correspond to 'make run_tests' order 45TEST_PROGS := test_kmod.sh \ 46 test_xdp_redirect.sh \ 47 test_xdp_meta.sh \ 48 test_xdp_veth.sh \ 49 test_offload.py \ 50 test_sock_addr.sh \ 51 test_tunnel.sh \ 52 test_lwt_seg6local.sh \ 53 test_lirc_mode2.sh \ 54 test_skb_cgroup_id.sh \ 55 test_flow_dissector.sh \ 56 test_xdp_vlan_mode_generic.sh \ 57 test_xdp_vlan_mode_native.sh \ 58 test_lwt_ip_encap.sh \ 59 test_tcp_check_syncookie.sh \ 60 test_tc_tunnel.sh \ 61 test_tc_edt.sh \ 62 test_xdping.sh \ 63 test_bpftool_build.sh 64 65TEST_PROGS_EXTENDED := with_addr.sh \ 66 with_tunnels.sh \ 67 tcp_client.py \ 68 tcp_server.py \ 69 test_xdp_vlan.sh 70 71# Compile but not part of 'make run_tests' 72TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \ 73 flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \ 74 test_lirc_mode2_user xdping test_cpp 75 76TEST_CUSTOM_PROGS = urandom_read 77 78include ../lib.mk 79 80# Define simple and short `make test_progs`, `make test_sysctl`, etc targets 81# to build individual tests. 82# NOTE: Semicolon at the end is critical to override lib.mk's default static 83# rule for binaries. 84$(notdir $(TEST_GEN_PROGS) \ 85 $(TEST_PROGS) \ 86 $(TEST_PROGS_EXTENDED) \ 87 $(TEST_GEN_PROGS_EXTENDED) \ 88 $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ; 89 90$(OUTPUT)/urandom_read: urandom_read.c 91 $(CC) -o $@ $< -Wl,--build-id 92 93$(OUTPUT)/test_stub.o: test_stub.c 94 $(CC) -c $(CFLAGS) -o $@ $< 95 96BPFOBJ := $(OUTPUT)/libbpf.a 97 98$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ) 99 100$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c 101$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c 102$(OUTPUT)/test_sock: cgroup_helpers.c 103$(OUTPUT)/test_sock_addr: cgroup_helpers.c 104$(OUTPUT)/test_socket_cookie: cgroup_helpers.c 105$(OUTPUT)/test_sockmap: cgroup_helpers.c 106$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c 107$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c 108$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c 109$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c 110$(OUTPUT)/test_netcnt: cgroup_helpers.c 111$(OUTPUT)/test_sock_fields: cgroup_helpers.c 112$(OUTPUT)/test_sysctl: cgroup_helpers.c 113$(OUTPUT)/test_cgroup_attach: cgroup_helpers.c 114 115.PHONY: force 116 117# force a rebuild of BPFOBJ when its dependencies are updated 118force: 119 120$(BPFOBJ): force 121 $(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/ 122 123BPF_HELPERS := $(OUTPUT)/bpf_helper_defs.h $(wildcard $(BPFDIR)/bpf_*.h) 124$(OUTPUT)/bpf_helper_defs.h: 125 $(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/ $(OUTPUT)/bpf_helper_defs.h 126 127# Get Clang's default includes on this system, as opposed to those seen by 128# '-target bpf'. This fixes "missing" files on some architectures/distros, 129# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 130# 131# Use '-idirafter': Don't interfere with include mechanics except where the 132# build would have failed anyways. 133define get_sys_includes 134$(shell $(1) -v -E - </dev/null 2>&1 \ 135 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') 136endef 137 138# Determine target endianness. 139IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ 140 grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') 141MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) 142 143CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 144BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ 145 -I. -I./include/uapi -I$(APIDIR) \ 146 -I$(BPFDIR) -I$(abspath $(OUTPUT)/../usr/include) 147 148CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \ 149 -Wno-compare-distinct-pointer-types 150 151$(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline 152$(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline 153 154$(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h 155 156# Build BPF object using Clang 157# $1 - input .c file 158# $2 - output .o file 159# $3 - CFLAGS 160# $4 - LDFLAGS 161define CLANG_BPF_BUILD_RULE 162 ($(CLANG) $3 -O2 -target bpf -emit-llvm \ 163 -c $1 -o - || echo "BPF obj compilation failed") | \ 164 $(LLC) -mattr=dwarfris -march=bpf -mcpu=probe $4 -filetype=obj -o $2 165endef 166# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 167define CLANG_NOALU32_BPF_BUILD_RULE 168 ($(CLANG) $3 -O2 -target bpf -emit-llvm \ 169 -c $1 -o - || echo "BPF obj compilation failed") | \ 170 $(LLC) -march=bpf -mcpu=v2 $4 -filetype=obj -o $2 171endef 172# Similar to CLANG_BPF_BUILD_RULE, but using native Clang and bpf LLC 173define CLANG_NATIVE_BPF_BUILD_RULE 174 ($(CLANG) $3 -O2 -emit-llvm \ 175 -c $1 -o - || echo "BPF obj compilation failed") | \ 176 $(LLC) -march=bpf -mcpu=probe $4 -filetype=obj -o $2 177endef 178# Build BPF object using GCC 179define GCC_BPF_BUILD_RULE 180 $(BPF_GCC) $3 $4 -O2 -c $1 -o $2 181endef 182 183# Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on 184# $eval()) and pass control to DEFINE_TEST_RUNNER_RULES. 185# Parameters: 186# $1 - test runner base binary name (e.g., test_progs) 187# $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc) 188define DEFINE_TEST_RUNNER 189 190TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2 191TRUNNER_BINARY := $1$(if $2,-)$2 192TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o, \ 193 $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c))) 194TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \ 195 $$(filter %.c,$(TRUNNER_EXTRA_SOURCES))) 196TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES)) 197TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h 198TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \ 199 $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))) 200 201# Evaluate rules now with extra TRUNNER_XXX variables above already defined 202$$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2)) 203 204endef 205 206# Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and 207# set up by DEFINE_TEST_RUNNER itself, create test runner build rules with: 208# $1 - test runner base binary name (e.g., test_progs) 209# $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc) 210define DEFINE_TEST_RUNNER_RULES 211 212ifeq ($($(TRUNNER_OUTPUT)-dir),) 213$(TRUNNER_OUTPUT)-dir := y 214$(TRUNNER_OUTPUT): 215 mkdir -p $$@ 216endif 217 218# ensure we set up BPF objects generation rule just once for a given 219# input/output directory combination 220ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),) 221$(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y 222$(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o: \ 223 $(TRUNNER_BPF_PROGS_DIR)/%.c \ 224 $(TRUNNER_BPF_PROGS_DIR)/*.h \ 225 $$(BPF_HELPERS) | $(TRUNNER_OUTPUT) 226 $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@, \ 227 $(TRUNNER_BPF_CFLAGS), \ 228 $(TRUNNER_BPF_LDFLAGS)) 229endif 230 231# ensure we set up tests.h header generation rule just once 232ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),) 233$(TRUNNER_TESTS_DIR)-tests-hdr := y 234$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c 235 $$(shell ( cd $(TRUNNER_TESTS_DIR); \ 236 echo '/* Generated header, do not edit */'; \ 237 ls *.c 2> /dev/null | \ 238 sed -e 's@\([^\.]*\)\.c@DEFINE_TEST(\1)@'; \ 239 ) > $$@) 240endif 241 242# compile individual test files 243# Note: we cd into output directory to ensure embedded BPF object is found 244$(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \ 245 $(TRUNNER_TESTS_DIR)/%.c \ 246 $(TRUNNER_EXTRA_HDRS) \ 247 $(TRUNNER_BPF_OBJS) \ 248 $$(BPFOBJ) | $(TRUNNER_OUTPUT) 249 cd $$(@D) && $$(CC) $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F) 250 251$(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o: \ 252 %.c \ 253 $(TRUNNER_EXTRA_HDRS) \ 254 $(TRUNNER_TESTS_HDR) \ 255 $$(BPFOBJ) | $(TRUNNER_OUTPUT) 256 $$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@ 257 258$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT) 259ifneq ($2,) 260 # only copy extra resources if in flavored build 261 cp -a $$^ $(TRUNNER_OUTPUT)/ 262endif 263 264$(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS) \ 265 $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ) \ 266 | $(TRUNNER_BINARY)-extras 267 $$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@ 268 269endef 270 271# Define test_progs test runner. 272TRUNNER_TESTS_DIR := prog_tests 273TRUNNER_BPF_PROGS_DIR := progs 274TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c \ 275 flow_dissector_load.h 276TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read \ 277 $(wildcard progs/btf_dump_test_case_*.c) 278TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE 279TRUNNER_BPF_CFLAGS := -I. -I$(OUTPUT) $(BPF_CFLAGS) $(CLANG_CFLAGS) 280TRUNNER_BPF_LDFLAGS := -mattr=+alu32 281$(eval $(call DEFINE_TEST_RUNNER,test_progs)) 282 283# Define test_progs-no_alu32 test runner. 284TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE 285TRUNNER_BPF_LDFLAGS := 286$(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32)) 287 288# Define test_progs BPF-GCC-flavored test runner. 289ifneq ($(BPF_GCC),) 290TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE 291TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc) 292TRUNNER_BPF_LDFLAGS := 293$(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc)) 294endif 295 296# Define test_maps test runner. 297TRUNNER_TESTS_DIR := map_tests 298TRUNNER_BPF_PROGS_DIR := progs 299TRUNNER_EXTRA_SOURCES := test_maps.c 300TRUNNER_EXTRA_FILES := 301TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built) 302TRUNNER_BPF_CFLAGS := 303TRUNNER_BPF_LDFLAGS := 304$(eval $(call DEFINE_TEST_RUNNER,test_maps)) 305 306# Define test_verifier test runner. 307# It is much simpler than test_maps/test_progs and sufficiently different from 308# them (e.g., test.h is using completely pattern), that it's worth just 309# explicitly defining all the rules explicitly. 310verifier/tests.h: verifier/*.c 311 $(shell ( cd verifier/; \ 312 echo '/* Generated header, do not edit */'; \ 313 echo '#ifdef FILL_ARRAY'; \ 314 ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \ 315 echo '#endif' \ 316 ) > verifier/tests.h) 317$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT) 318 $(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@ 319 320# Make sure we are able to include and link libbpf against c++. 321$(OUTPUT)/test_cpp: test_cpp.cpp $(BPFOBJ) 322 $(CXX) $(CFLAGS) $^ $(LDLIBS) -o $@ 323 324EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) \ 325 prog_tests/tests.h map_tests/tests.h verifier/tests.h \ 326 feature $(OUTPUT)/*.o $(OUTPUT)/no_alu32 $(OUTPUT)/bpf_gcc 327