tools/testing/selftests/bpf/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../../../build/Build.include
   3 include ../../../scripts/Makefile.arch
   4 include ../../../scripts/Makefile.include
   5
   6 CXX ?= $(CROSS_COMPILE)g++
   7
   8 CURDIR := $(abspath .)
   9 TOOLSDIR := $(abspath ../../..)
  10 LIBDIR := $(TOOLSDIR)/lib
  11 BPFDIR := $(LIBDIR)/bpf
  12 TOOLSINCDIR := $(TOOLSDIR)/include
  13 BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
  14 APIDIR := $(TOOLSINCDIR)/uapi
  15 GENDIR := $(abspath ../../../../include/generated)
  16 GENHDR := $(GENDIR)/autoconf.h
  17 HOSTPKG_CONFIG := pkg-config
  18
  19 ifneq ($(wildcard $(GENHDR)),)
  20   GENFLAGS := -DHAVE_GENHDR
  21 endif
  22
  23 BPF_GCC         ?= $(shell command -v bpf-gcc;)
  24 SAN_CFLAGS      ?=
  25 CFLAGS += -g -O0 -rdynamic -Wall -Werror $(GENFLAGS) $(SAN_CFLAGS)      \
  26           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
  27           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)
  28 LDFLAGS += $(SAN_CFLAGS)
  29 LDLIBS += -lelf -lz -lrt -lpthread
  30
  31 # Silence some warnings when compiled with clang
  32 ifneq ($(LLVM),)
  33 CFLAGS += -Wno-unused-command-line-argument
  34 endif
  35
  36 # Order correspond to 'make run_tests' order
  37 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
  38         test_verifier_log test_dev_cgroup \
  39         test_sock test_sockmap get_cgroup_id_user \
  40         test_cgroup_storage \
  41         test_tcpnotify_user test_sysctl \
  42         test_progs-no_alu32
  43
  44 # Also test bpf-gcc, if present
  45 ifneq ($(BPF_GCC),)
  46 TEST_GEN_PROGS += test_progs-bpf_gcc
  47 endif
  48
  49 TEST_GEN_FILES = test_lwt_ip_encap.bpf.o test_tc_edt.bpf.o
  50 TEST_FILES = xsk_prereqs.sh $(wildcard progs/btf_dump_test_case_*.c)
  51
  52 # Order correspond to 'make run_tests' order
  53 TEST_PROGS := test_kmod.sh \
  54         test_xdp_redirect.sh \
  55         test_xdp_redirect_multi.sh \
  56         test_xdp_meta.sh \
  57         test_xdp_veth.sh \
  58         test_offload.py \
  59         test_sock_addr.sh \
  60         test_tunnel.sh \
  61         test_lwt_seg6local.sh \
  62         test_lirc_mode2.sh \
  63         test_skb_cgroup_id.sh \
  64         test_flow_dissector.sh \
  65         test_xdp_vlan_mode_generic.sh \
  66         test_xdp_vlan_mode_native.sh \
  67         test_lwt_ip_encap.sh \
  68         test_tcp_check_syncookie.sh \
  69         test_tc_tunnel.sh \
  70         test_tc_edt.sh \
  71         test_xdping.sh \
  72         test_bpftool_build.sh \
  73         test_bpftool.sh \
  74         test_bpftool_metadata.sh \
  75         test_doc_build.sh \
  76         test_xsk.sh
  77
  78 TEST_PROGS_EXTENDED := with_addr.sh \
  79         with_tunnels.sh ima_setup.sh verify_sig_setup.sh \
  80         test_xdp_vlan.sh test_bpftool.py
  81
  82 # Compile but not part of 'make run_tests'
  83 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
  84         flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
  85         test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
  86         xskxceiver xdp_redirect_multi xdp_synproxy veristat
  87
  88 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read $(OUTPUT)/sign-file
  89 TEST_GEN_FILES += liburandom_read.so
  90
  91 # Emit succinct information message describing current building step
  92 # $1 - generic step name (e.g., CC, LINK, etc);
  93 # $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
  94 # $3 - target (assumed to be file); only file name will be emitted;
  95 # $4 - optional extra arg, emitted as-is, if provided.
  96 ifeq ($(V),1)
  97 Q =
  98 msg =
  99 else
 100 Q = @
 101 msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
 102 MAKEFLAGS += --no-print-directory
 103 submake_extras := feature_display=0
 104 endif
 105
 106 # override lib.mk's default rules
 107 OVERRIDE_TARGETS := 1
 108 override define CLEAN
 109         $(call msg,CLEAN)
 110         $(Q)$(RM) -r $(TEST_GEN_PROGS)
 111         $(Q)$(RM) -r $(TEST_GEN_PROGS_EXTENDED)
 112         $(Q)$(RM) -r $(TEST_GEN_FILES)
 113         $(Q)$(RM) -r $(EXTRA_CLEAN)
 114         $(Q)$(MAKE) -C bpf_testmod clean
 115         $(Q)$(MAKE) docs-clean
 116 endef
 117
 118 include ../lib.mk
 119
 120 SCRATCH_DIR := $(OUTPUT)/tools
 121 BUILD_DIR := $(SCRATCH_DIR)/build
 122 INCLUDE_DIR := $(SCRATCH_DIR)/include
 123 BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
 124 ifneq ($(CROSS_COMPILE),)
 125 HOST_BUILD_DIR          := $(BUILD_DIR)/host
 126 HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools
 127 HOST_INCLUDE_DIR        := $(HOST_SCRATCH_DIR)/include
 128 else
 129 HOST_BUILD_DIR          := $(BUILD_DIR)
 130 HOST_SCRATCH_DIR        := $(SCRATCH_DIR)
 131 HOST_INCLUDE_DIR        := $(INCLUDE_DIR)
 132 endif
 133 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
 134 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
 135 RUNQSLOWER_OUTPUT := $(BUILD_DIR)/runqslower/
 136
 137 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 138                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 139                      ../../../../vmlinux                                \
 140                      /sys/kernel/btf/vmlinux                            \
 141                      /boot/vmlinux-$(shell uname -r)
 142 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 143 ifeq ($(VMLINUX_BTF),)
 144 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
 145 endif
 146
 147 # Define simple and short `make test_progs`, `make test_sysctl`, etc targets
 148 # to build individual tests.
 149 # NOTE: Semicolon at the end is critical to override lib.mk's default static
 150 # rule for binaries.
 151 $(notdir $(TEST_GEN_PROGS)                                              \
 152          $(TEST_GEN_PROGS_EXTENDED)                                     \
 153          $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;
 154
 155 # sort removes libbpf duplicates when not cross-building
 156 MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf               \
 157                $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids      \
 158                $(RUNQSLOWER_OUTPUT) $(INCLUDE_DIR))
 159 $(MAKE_DIRS):
 160         $(call msg,MKDIR,,$@)
 161         $(Q)mkdir -p $@
 162
 163 $(OUTPUT)/%.o: %.c
 164         $(call msg,CC,,$@)
 165         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 166
 167 $(OUTPUT)/%:%.c
 168         $(call msg,BINARY,,$@)
 169         $(Q)$(LINK.c) $^ $(LDLIBS) -o $@
 170
 171 # LLVM's ld.lld doesn't support all the architectures, so use it only on x86
 172 ifeq ($(SRCARCH),x86)
 173 LLD := lld
 174 else
 175 LLD := ld
 176 endif
 177
 178 # Filter out -static for liburandom_read.so and its dependent targets so that static builds
 179 # do not fail. Static builds leave urandom_read relying on system-wide shared libraries.
 180 $(OUTPUT)/liburandom_read.so: urandom_read_lib1.c urandom_read_lib2.c
 181         $(call msg,LIB,,$@)
 182         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS))   \
 183                      $^ $(filter-out -static,$(LDLIBS))      \
 184                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 185                      -fPIC -shared -o $@
 186
 187 $(OUTPUT)/urandom_read: urandom_read.c urandom_read_aux.c $(OUTPUT)/liburandom_read.so
 188         $(call msg,BINARY,,$@)
 189         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS)) $(filter %.c,$^) \
 190                      liburandom_read.so $(filter-out -static,$(LDLIBS))      \
 191                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 192                      -Wl,-rpath=. -o $@
 193
 194 $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c
 195         $(call msg,SIGN-FILE,,$@)
 196         $(Q)$(CC) $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null) \
 197                   $< -o $@ \
 198                   $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
 199
 200 $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
 201         $(call msg,MOD,,$@)
 202         $(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
 203         $(Q)$(MAKE) $(submake_extras) -C bpf_testmod
 204         $(Q)cp bpf_testmod/bpf_testmod.ko $@
 205
 206 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
 207
 208 $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL) $(RUNQSLOWER_OUTPUT)
 209         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower            \
 210                     OUTPUT=$(RUNQSLOWER_OUTPUT) VMLINUX_BTF=$(VMLINUX_BTF)     \
 211                     BPFTOOL_OUTPUT=$(HOST_BUILD_DIR)/bpftool/                  \
 212                     BPFOBJ_OUTPUT=$(BUILD_DIR)/libbpf                          \
 213                     BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR) &&             \
 214                     cp $(RUNQSLOWER_OUTPUT)runqslower $@
 215
 216 TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
 217
 218 $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
 219
 220 CGROUP_HELPERS  := $(OUTPUT)/cgroup_helpers.o
 221 TESTING_HELPERS := $(OUTPUT)/testing_helpers.o
 222 TRACE_HELPERS   := $(OUTPUT)/trace_helpers.o
 223 CAP_HELPERS     := $(OUTPUT)/cap_helpers.o
 224
 225 $(OUTPUT)/test_dev_cgroup: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 226 $(OUTPUT)/test_skb_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 227 $(OUTPUT)/test_sock: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 228 $(OUTPUT)/test_sock_addr: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 229 $(OUTPUT)/test_sockmap: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 230 $(OUTPUT)/test_tcpnotify_user: $(CGROUP_HELPERS) $(TESTING_HELPERS) $(TRACE_HELPERS)
 231 $(OUTPUT)/get_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 232 $(OUTPUT)/test_cgroup_storage: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 233 $(OUTPUT)/test_sock_fields: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 234 $(OUTPUT)/test_sysctl: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 235 $(OUTPUT)/test_tag: $(TESTING_HELPERS)
 236 $(OUTPUT)/test_lirc_mode2_user: $(TESTING_HELPERS)
 237 $(OUTPUT)/xdping: $(TESTING_HELPERS)
 238 $(OUTPUT)/flow_dissector_load: $(TESTING_HELPERS)
 239 $(OUTPUT)/test_maps: $(TESTING_HELPERS)
 240 $(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS)
 241 $(OUTPUT)/xsk.o: $(BPFOBJ)
 242 $(OUTPUT)/xskxceiver: $(OUTPUT)/xsk.o
 243
 244 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 245 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
 246                     $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
 247         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                        \
 248                     ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD)             \
 249                     EXTRA_CFLAGS='-g -O0'                                      \
 250                     OUTPUT=$(HOST_BUILD_DIR)/bpftool/                          \
 251                     LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/                    \
 252                     LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/                        \
 253                     prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
 254
 255 all: docs
 256
 257 docs:
 258         $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)    \
 259                     -f Makefile.docs                                    \
 260                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 261
 262 docs-clean:
 263         $(Q)$(MAKE) $(submake_extras)                                   \
 264                     -f Makefile.docs                                    \
 265                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 266
 267 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                     \
 268            $(APIDIR)/linux/bpf.h                                               \
 269            | $(BUILD_DIR)/libbpf
 270         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
 271                     EXTRA_CFLAGS='-g -O0'                                      \
 272                     DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
 273
 274 ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
 275 $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                \
 276                 $(APIDIR)/linux/bpf.h                                          \
 277                 | $(HOST_BUILD_DIR)/libbpf
 278         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
 279                     EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE=                 \
 280                     OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
 281                     DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
 282 endif
 283
 284 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 285 ifeq ($(VMLINUX_H),)
 286         $(call msg,GEN,,$@)
 287         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 288 else
 289         $(call msg,CP,,$@)
 290         $(Q)cp "$(VMLINUX_H)" $@
 291 endif
 292
 293 $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids    \
 294                        $(TOOLSDIR)/bpf/resolve_btfids/main.c    \
 295                        $(TOOLSDIR)/lib/rbtree.c                 \
 296                        $(TOOLSDIR)/lib/zalloc.c                 \
 297                        $(TOOLSDIR)/lib/string.c                 \
 298                        $(TOOLSDIR)/lib/ctype.c                  \
 299                        $(TOOLSDIR)/lib/str_error_r.c
 300         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
 301                 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
 302                 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
 303                 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
 304
 305 # Get Clang's default includes on this system, as opposed to those seen by
 306 # '-target bpf'. This fixes "missing" files on some architectures/distros,
 307 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
 308 #
 309 # Use '-idirafter': Don't interfere with include mechanics except where the
 310 # build would have failed anyways.
 311 define get_sys_includes
 312 $(shell $(1) -v -E - </dev/null 2>&1 \
 313         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
 314 $(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
 315 endef
 316
 317 # Determine target endianness.
 318 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
 319                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
 320 MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 321
 322 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
 323 BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN)           \
 324              -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)                   \
 325              -I$(abspath $(OUTPUT)/../usr/include)
 326
 327 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
 328                -Wno-compare-distinct-pointer-types
 329
 330 $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
 331 $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
 332
 333 $(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
 334 $(OUTPUT)/cgroup_getset_retval_hooks.o: cgroup_getset_retval_hooks.h
 335
 336 # Build BPF object using Clang
 337 # $1 - input .c file
 338 # $2 - output .o file
 339 # $3 - CFLAGS
 340 define CLANG_BPF_BUILD_RULE
 341         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 342         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2
 343 endef
 344 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 345 define CLANG_NOALU32_BPF_BUILD_RULE
 346         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 347         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2
 348 endef
 349 # Build BPF object using GCC
 350 define GCC_BPF_BUILD_RULE
 351         $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
 352         $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
 353 endef
 354
 355 SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 356
 357 LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h           \
 358                 linked_vars.skel.h linked_maps.skel.h                   \
 359                 test_subskeleton.skel.h test_subskeleton_lib.skel.h     \
 360                 test_usdt.skel.h
 361
 362 LSKELS := fentry_test.c fexit_test.c fexit_sleep.c \
 363         test_ringbuf.c atomics.c trace_printk.c trace_vprintk.c \
 364         map_ptr_kern.c core_kern.c core_kern_overflow.c
 365 # Generate both light skeleton and libbpf skeleton for these
 366 LSKELS_EXTRA := test_ksyms_module.c test_ksyms_weak.c kfunc_call_test.c \
 367         kfunc_call_test_subprog.c
 368 SKEL_BLACKLIST += $$(LSKELS)
 369
 370 test_static_linked.skel.h-deps := test_static_linked1.bpf.o test_static_linked2.bpf.o
 371 linked_funcs.skel.h-deps := linked_funcs1.bpf.o linked_funcs2.bpf.o
 372 linked_vars.skel.h-deps := linked_vars1.bpf.o linked_vars2.bpf.o
 373 linked_maps.skel.h-deps := linked_maps1.bpf.o linked_maps2.bpf.o
 374 # In the subskeleton case, we want the test_subskeleton_lib.subskel.h file
 375 # but that's created as a side-effect of the skel.h generation.
 376 test_subskeleton.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o test_subskeleton.bpf.o
 377 test_subskeleton_lib.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o
 378 test_usdt.skel.h-deps := test_usdt.bpf.o test_usdt_multispec.bpf.o
 379
 380 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 381
 382 # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
 383 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 384 # Parameters:
 385 # $1 - test runner base binary name (e.g., test_progs)
 386 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 387 define DEFINE_TEST_RUNNER
 388
 389 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
 390 TRUNNER_BINARY := $1$(if $2,-)$2
 391 TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o,       \
 392                                  $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
 393 TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,           \
 394                                  $$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
 395 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
 396 TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
 397 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 398 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))
 399 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,       \
 400                                  $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
 401                                                $$(TRUNNER_BPF_SRCS)))
 402 TRUNNER_BPF_LSKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.lskel.h, $$(LSKELS) $$(LSKELS_EXTRA))
 403 TRUNNER_BPF_SKELS_LINKED := $$(addprefix $$(TRUNNER_OUTPUT)/,$(LINKED_SKELS))
 404 TEST_GEN_FILES += $$(TRUNNER_BPF_OBJS)
 405
 406 # Evaluate rules now with extra TRUNNER_XXX variables above already defined
 407 $$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
 408
 409 endef
 410
 411 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 412 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 413 # $1 - test runner base binary name (e.g., test_progs)
 414 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 415 define DEFINE_TEST_RUNNER_RULES
 416
 417 ifeq ($($(TRUNNER_OUTPUT)-dir),)
 418 $(TRUNNER_OUTPUT)-dir := y
 419 $(TRUNNER_OUTPUT):
 420         $$(call msg,MKDIR,,$$@)
 421         $(Q)mkdir -p $$@
 422 endif
 423
 424 # ensure we set up BPF objects generation rule just once for a given
 425 # input/output directory combination
 426 ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
 427 $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
 428 $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o:                         \
 429                      $(TRUNNER_BPF_PROGS_DIR)/%.c                       \
 430                      $(TRUNNER_BPF_PROGS_DIR)/*.h                       \
 431                      $$(INCLUDE_DIR)/vmlinux.h                          \
 432                      $(wildcard $(BPFDIR)/bpf_*.h)                      \
 433                      $(wildcard $(BPFDIR)/*.bpf.h)                      \
 434                      | $(TRUNNER_OUTPUT) $$(BPFOBJ)
 435         $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,                      \
 436                                           $(TRUNNER_BPF_CFLAGS))
 437
 438 $(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 439         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 440         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 441         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 442         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 443         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 444         $(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$@
 445         $(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$(@:.skel.h=.subskel.h)
 446
 447 $(TRUNNER_BPF_LSKELS): %.lskel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 448         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 449         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked1.o) $$<
 450         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked2.o) $$(<:.o=.llinked1.o)
 451         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked3.o) $$(<:.o=.llinked2.o)
 452         $(Q)diff $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
 453         $(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.bpf.o=_lskel)) > $$@
 454
 455 $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
 456         $$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.bpf.o))
 457         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
 458         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
 459         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
 460         $(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
 461         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 462         $(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
 463         $(Q)$$(BPFTOOL) gen subskeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$(@:.skel.h=.subskel.h)
 464 endif
 465
 466 # ensure we set up tests.h header generation rule just once
 467 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 468 $(TRUNNER_TESTS_DIR)-tests-hdr := y
 469 $(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
 470         $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
 471         $$(shell (echo '/* Generated header, do not edit */';                                   \
 472                   sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\).*/DEFINE_TEST(\2)/p'     \
 473                         $(TRUNNER_TESTS_DIR)/*.c | sort ;       \
 474                  ) > $$@)
 475 endif
 476
 477 # compile individual test files
 478 # Note: we cd into output directory to ensure embedded BPF object is found
 479 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                       \
 480                       $(TRUNNER_TESTS_DIR)/%.c                          \
 481                       $(TRUNNER_EXTRA_HDRS)                             \
 482                       $(TRUNNER_BPF_OBJS)                               \
 483                       $(TRUNNER_BPF_SKELS)                              \
 484                       $(TRUNNER_BPF_LSKELS)                             \
 485                       $(TRUNNER_BPF_SKELS_LINKED)                       \
 486                       $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 487         $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
 488         $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 489
 490 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                           \
 491                        %.c                                              \
 492                        $(TRUNNER_EXTRA_HDRS)                            \
 493                        $(TRUNNER_TESTS_HDR)                             \
 494                        $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 495         $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
 496         $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
 497
 498 # non-flavored in-srctree builds receive special treatment, in particular, we
 499 # do not need to copy extra resources (see e.g. test_btf_dump_case())
 500 $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
 501 ifneq ($2:$(OUTPUT),:$(shell pwd))
 502         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
 503         $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
 504 endif
 505
 506 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                       \
 507                              $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ)           \
 508                              $(RESOLVE_BTFIDS)                          \
 509                              | $(TRUNNER_BINARY)-extras
 510         $$(call msg,BINARY,,$$@)
 511         $(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
 512         $(Q)$(RESOLVE_BTFIDS) --btf $(TRUNNER_OUTPUT)/btf_data.bpf.o $$@
 513         $(Q)ln -sf $(if $2,..,.)/tools/build/bpftool/bootstrap/bpftool $(if $2,$2/)bpftool
 514
 515 endef
 516
 517 # Define test_progs test runner.
 518 TRUNNER_TESTS_DIR := prog_tests
 519 TRUNNER_BPF_PROGS_DIR := progs
 520 TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c  \
 521                          network_helpers.c testing_helpers.c            \
 522                          btf_helpers.c flow_dissector_load.h            \
 523                          cap_helpers.c
 524 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko  \
 525                        $(OUTPUT)/liburandom_read.so                     \
 526                        $(OUTPUT)/xdp_synproxy                           \
 527                        $(OUTPUT)/sign-file                              \
 528                        ima_setup.sh verify_sig_setup.sh                 \
 529                        $(wildcard progs/btf_dump_test_case_*.c)
 530 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 531 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS) -DENABLE_ATOMICS_TESTS
 532 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
 533
 534 # Define test_progs-no_alu32 test runner.
 535 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 536 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 537 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
 538
 539 # Define test_progs BPF-GCC-flavored test runner.
 540 ifneq ($(BPF_GCC),)
 541 TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE
 542 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc)
 543 $(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc))
 544 endif
 545
 546 # Define test_maps test runner.
 547 TRUNNER_TESTS_DIR := map_tests
 548 TRUNNER_BPF_PROGS_DIR := progs
 549 TRUNNER_EXTRA_SOURCES := test_maps.c
 550 TRUNNER_EXTRA_FILES :=
 551 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 552 TRUNNER_BPF_CFLAGS :=
 553 $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 554
 555 # Define test_verifier test runner.
 556 # It is much simpler than test_maps/test_progs and sufficiently different from
 557 # them (e.g., test.h is using completely pattern), that it's worth just
 558 # explicitly defining all the rules explicitly.
 559 verifier/tests.h: verifier/*.c
 560         $(shell ( cd verifier/; \
 561                   echo '/* Generated header, do not edit */'; \
 562                   echo '#ifdef FILL_ARRAY'; \
 563                   ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
 564                   echo '#endif' \
 565                 ) > verifier/tests.h)
 566 $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 567         $(call msg,BINARY,,$@)
 568         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 569
 570 # Make sure we are able to include and link libbpf against c++.
 571 $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
 572         $(call msg,CXX,,$@)
 573         $(Q)$(CXX) $(CFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
 574
 575 # Benchmark runner
 576 $(OUTPUT)/bench_%.o: benchs/bench_%.c bench.h $(BPFOBJ)
 577         $(call msg,CC,,$@)
 578         $(Q)$(CC) $(CFLAGS) -O2 -c $(filter %.c,$^) $(LDLIBS) -o $@
 579 $(OUTPUT)/bench_rename.o: $(OUTPUT)/test_overhead.skel.h
 580 $(OUTPUT)/bench_trigger.o: $(OUTPUT)/trigger_bench.skel.h
 581 $(OUTPUT)/bench_ringbufs.o: $(OUTPUT)/ringbuf_bench.skel.h \
 582                             $(OUTPUT)/perfbuf_bench.skel.h
 583 $(OUTPUT)/bench_bloom_filter_map.o: $(OUTPUT)/bloom_filter_bench.skel.h
 584 $(OUTPUT)/bench_bpf_loop.o: $(OUTPUT)/bpf_loop_bench.skel.h
 585 $(OUTPUT)/bench_strncmp.o: $(OUTPUT)/strncmp_bench.skel.h
 586 $(OUTPUT)/bench_bpf_hashmap_full_update.o: $(OUTPUT)/bpf_hashmap_full_update_bench.skel.h
 587 $(OUTPUT)/bench_local_storage.o: $(OUTPUT)/local_storage_bench.skel.h
 588 $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o: $(OUTPUT)/local_storage_rcu_tasks_trace_bench.skel.h
 589 $(OUTPUT)/bench.o: bench.h testing_helpers.h $(BPFOBJ)
 590 $(OUTPUT)/bench: LDLIBS += -lm
 591 $(OUTPUT)/bench: $(OUTPUT)/bench.o \
 592                  $(TESTING_HELPERS) \
 593                  $(TRACE_HELPERS) \
 594                  $(OUTPUT)/bench_count.o \
 595                  $(OUTPUT)/bench_rename.o \
 596                  $(OUTPUT)/bench_trigger.o \
 597                  $(OUTPUT)/bench_ringbufs.o \
 598                  $(OUTPUT)/bench_bloom_filter_map.o \
 599                  $(OUTPUT)/bench_bpf_loop.o \
 600                  $(OUTPUT)/bench_strncmp.o \
 601                  $(OUTPUT)/bench_bpf_hashmap_full_update.o \
 602                  $(OUTPUT)/bench_local_storage.o \
 603                  $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o
 604         $(call msg,BINARY,,$@)
 605         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 606
 607 $(OUTPUT)/veristat.o: $(BPFOBJ)
 608 $(OUTPUT)/veristat: $(OUTPUT)/veristat.o
 609         $(call msg,BINARY,,$@)
 610         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 611
 612 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)  \
 613         prog_tests/tests.h map_tests/tests.h verifier/tests.h           \
 614         feature bpftool                                                 \
 615         $(addprefix $(OUTPUT)/,*.o *.skel.h *.lskel.h *.subskel.h       \
 616                                no_alu32 bpf_gcc bpf_testmod.ko          \
 617                                liburandom_read.so)
 618
 619 .PHONY: docs docs-clean