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 SAN_LDFLAGS     ?= $(SAN_CFLAGS)
  26 CFLAGS += -g -O0 -rdynamic -Wall -Werror $(GENFLAGS) $(SAN_CFLAGS)      \
  27           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
  28           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)
  29 LDFLAGS += $(SAN_LDFLAGS)
  30 LDLIBS += -lelf -lz -lrt -lpthread
  31
  32 # Silence some warnings when compiled with clang
  33 ifneq ($(LLVM),)
  34 CFLAGS += -Wno-unused-command-line-argument
  35 endif
  36
  37 # Order correspond to 'make run_tests' order
  38 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
  39         test_verifier_log test_dev_cgroup \
  40         test_sock test_sockmap get_cgroup_id_user \
  41         test_cgroup_storage \
  42         test_tcpnotify_user test_sysctl \
  43         test_progs-no_alu32
  44
  45 # Also test bpf-gcc, if present
  46 ifneq ($(BPF_GCC),)
  47 TEST_GEN_PROGS += test_progs-bpf_gcc
  48 endif
  49
  50 TEST_GEN_FILES = test_lwt_ip_encap.bpf.o test_tc_edt.bpf.o
  51 TEST_FILES = xsk_prereqs.sh $(wildcard progs/btf_dump_test_case_*.c)
  52
  53 # Order correspond to 'make run_tests' order
  54 TEST_PROGS := test_kmod.sh \
  55         test_xdp_redirect.sh \
  56         test_xdp_redirect_multi.sh \
  57         test_xdp_meta.sh \
  58         test_xdp_veth.sh \
  59         test_offload.py \
  60         test_sock_addr.sh \
  61         test_tunnel.sh \
  62         test_lwt_seg6local.sh \
  63         test_lirc_mode2.sh \
  64         test_skb_cgroup_id.sh \
  65         test_flow_dissector.sh \
  66         test_xdp_vlan_mode_generic.sh \
  67         test_xdp_vlan_mode_native.sh \
  68         test_lwt_ip_encap.sh \
  69         test_tcp_check_syncookie.sh \
  70         test_tc_tunnel.sh \
  71         test_tc_edt.sh \
  72         test_xdping.sh \
  73         test_bpftool_build.sh \
  74         test_bpftool.sh \
  75         test_bpftool_metadata.sh \
  76         test_doc_build.sh \
  77         test_xsk.sh \
  78         test_xdp_features.sh
  79
  80 TEST_PROGS_EXTENDED := with_addr.sh \
  81         with_tunnels.sh ima_setup.sh verify_sig_setup.sh \
  82         test_xdp_vlan.sh test_bpftool.py
  83
  84 # Compile but not part of 'make run_tests'
  85 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
  86         flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
  87         test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
  88         xskxceiver xdp_redirect_multi xdp_synproxy veristat xdp_hw_metadata \
  89         xdp_features
  90
  91 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read $(OUTPUT)/sign-file
  92 TEST_GEN_FILES += liburandom_read.so
  93
  94 # Emit succinct information message describing current building step
  95 # $1 - generic step name (e.g., CC, LINK, etc);
  96 # $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
  97 # $3 - target (assumed to be file); only file name will be emitted;
  98 # $4 - optional extra arg, emitted as-is, if provided.
  99 ifeq ($(V),1)
 100 Q =
 101 msg =
 102 else
 103 Q = @
 104 msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
 105 MAKEFLAGS += --no-print-directory
 106 submake_extras := feature_display=0
 107 endif
 108
 109 # override lib.mk's default rules
 110 OVERRIDE_TARGETS := 1
 111 override define CLEAN
 112         $(call msg,CLEAN)
 113         $(Q)$(RM) -r $(TEST_GEN_PROGS)
 114         $(Q)$(RM) -r $(TEST_GEN_PROGS_EXTENDED)
 115         $(Q)$(RM) -r $(TEST_GEN_FILES)
 116         $(Q)$(RM) -r $(EXTRA_CLEAN)
 117         $(Q)$(MAKE) -C bpf_testmod clean
 118         $(Q)$(MAKE) docs-clean
 119 endef
 120
 121 include ../lib.mk
 122
 123 SCRATCH_DIR := $(OUTPUT)/tools
 124 BUILD_DIR := $(SCRATCH_DIR)/build
 125 INCLUDE_DIR := $(SCRATCH_DIR)/include
 126 BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
 127 ifneq ($(CROSS_COMPILE),)
 128 HOST_BUILD_DIR          := $(BUILD_DIR)/host
 129 HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools
 130 HOST_INCLUDE_DIR        := $(HOST_SCRATCH_DIR)/include
 131 else
 132 HOST_BUILD_DIR          := $(BUILD_DIR)
 133 HOST_SCRATCH_DIR        := $(SCRATCH_DIR)
 134 HOST_INCLUDE_DIR        := $(INCLUDE_DIR)
 135 endif
 136 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
 137 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
 138 RUNQSLOWER_OUTPUT := $(BUILD_DIR)/runqslower/
 139
 140 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 141                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 142                      ../../../../vmlinux                                \
 143                      /sys/kernel/btf/vmlinux                            \
 144                      /boot/vmlinux-$(shell uname -r)
 145 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 146 ifeq ($(VMLINUX_BTF),)
 147 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
 148 endif
 149
 150 # Define simple and short `make test_progs`, `make test_sysctl`, etc targets
 151 # to build individual tests.
 152 # NOTE: Semicolon at the end is critical to override lib.mk's default static
 153 # rule for binaries.
 154 $(notdir $(TEST_GEN_PROGS)                                              \
 155          $(TEST_GEN_PROGS_EXTENDED)                                     \
 156          $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;
 157
 158 # sort removes libbpf duplicates when not cross-building
 159 MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf        \
 160                $(BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/bpftool           \
 161                $(HOST_BUILD_DIR)/resolve_btfids                         \
 162                $(RUNQSLOWER_OUTPUT) $(INCLUDE_DIR))
 163 $(MAKE_DIRS):
 164         $(call msg,MKDIR,,$@)
 165         $(Q)mkdir -p $@
 166
 167 $(OUTPUT)/%.o: %.c
 168         $(call msg,CC,,$@)
 169         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 170
 171 $(OUTPUT)/%:%.c
 172         $(call msg,BINARY,,$@)
 173         $(Q)$(LINK.c) $^ $(LDLIBS) -o $@
 174
 175 # LLVM's ld.lld doesn't support all the architectures, so use it only on x86
 176 ifeq ($(SRCARCH),x86)
 177 LLD := lld
 178 else
 179 LLD := ld
 180 endif
 181
 182 # Filter out -static for liburandom_read.so and its dependent targets so that static builds
 183 # do not fail. Static builds leave urandom_read relying on system-wide shared libraries.
 184 $(OUTPUT)/liburandom_read.so: urandom_read_lib1.c urandom_read_lib2.c
 185         $(call msg,LIB,,$@)
 186         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS))   \
 187                      $^ $(filter-out -static,$(LDLIBS))      \
 188                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 189                      -fPIC -shared -o $@
 190
 191 $(OUTPUT)/urandom_read: urandom_read.c urandom_read_aux.c $(OUTPUT)/liburandom_read.so
 192         $(call msg,BINARY,,$@)
 193         $(Q)$(CLANG) $(filter-out -static,$(CFLAGS) $(LDFLAGS)) $(filter %.c,$^) \
 194                      -lurandom_read $(filter-out -static,$(LDLIBS)) -L$(OUTPUT)  \
 195                      -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
 196                      -Wl,-rpath=. -o $@
 197
 198 $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c
 199         $(call msg,SIGN-FILE,,$@)
 200         $(Q)$(CC) $(shell $(HOSTPKG_CONFIG)--cflags libcrypto 2> /dev/null) \
 201                   $< -o $@ \
 202                   $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
 203
 204 $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
 205         $(call msg,MOD,,$@)
 206         $(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
 207         $(Q)$(MAKE) $(submake_extras) RESOLVE_BTFIDS=$(RESOLVE_BTFIDS) -C bpf_testmod
 208         $(Q)cp bpf_testmod/bpf_testmod.ko $@
 209
 210 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
 211 ifneq ($(CROSS_COMPILE),)
 212 CROSS_BPFTOOL := $(SCRATCH_DIR)/sbin/bpftool
 213 TRUNNER_BPFTOOL := $(CROSS_BPFTOOL)
 214 USE_BOOTSTRAP := ""
 215 else
 216 TRUNNER_BPFTOOL := $(DEFAULT_BPFTOOL)
 217 USE_BOOTSTRAP := "bootstrap/"
 218 endif
 219
 220 $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL) $(RUNQSLOWER_OUTPUT)
 221         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower            \
 222                     OUTPUT=$(RUNQSLOWER_OUTPUT) VMLINUX_BTF=$(VMLINUX_BTF)     \
 223                     BPFTOOL_OUTPUT=$(HOST_BUILD_DIR)/bpftool/                  \
 224                     BPFOBJ_OUTPUT=$(BUILD_DIR)/libbpf                          \
 225                     BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR)                \
 226                     EXTRA_CFLAGS='-g -O0 $(SAN_CFLAGS)'                        \
 227                     EXTRA_LDFLAGS='$(SAN_LDFLAGS)' &&                          \
 228                     cp $(RUNQSLOWER_OUTPUT)runqslower $@
 229
 230 TEST_GEN_PROGS_EXTENDED += $(TRUNNER_BPFTOOL)
 231
 232 $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
 233
 234 CGROUP_HELPERS  := $(OUTPUT)/cgroup_helpers.o
 235 TESTING_HELPERS := $(OUTPUT)/testing_helpers.o
 236 TRACE_HELPERS   := $(OUTPUT)/trace_helpers.o
 237 CAP_HELPERS     := $(OUTPUT)/cap_helpers.o
 238
 239 $(OUTPUT)/test_dev_cgroup: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 240 $(OUTPUT)/test_skb_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 241 $(OUTPUT)/test_sock: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 242 $(OUTPUT)/test_sock_addr: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 243 $(OUTPUT)/test_sockmap: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 244 $(OUTPUT)/test_tcpnotify_user: $(CGROUP_HELPERS) $(TESTING_HELPERS) $(TRACE_HELPERS)
 245 $(OUTPUT)/get_cgroup_id_user: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 246 $(OUTPUT)/test_cgroup_storage: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 247 $(OUTPUT)/test_sock_fields: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 248 $(OUTPUT)/test_sysctl: $(CGROUP_HELPERS) $(TESTING_HELPERS)
 249 $(OUTPUT)/test_tag: $(TESTING_HELPERS)
 250 $(OUTPUT)/test_lirc_mode2_user: $(TESTING_HELPERS)
 251 $(OUTPUT)/xdping: $(TESTING_HELPERS)
 252 $(OUTPUT)/flow_dissector_load: $(TESTING_HELPERS)
 253 $(OUTPUT)/test_maps: $(TESTING_HELPERS)
 254 $(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS)
 255 $(OUTPUT)/xsk.o: $(BPFOBJ)
 256
 257 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 258 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
 259                     $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
 260         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                        \
 261                     ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD="$(HOSTLD)"         \
 262                     EXTRA_CFLAGS='-g -O0'                                      \
 263                     OUTPUT=$(HOST_BUILD_DIR)/bpftool/                          \
 264                     LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/                    \
 265                     LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/                        \
 266                     prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
 267
 268 ifneq ($(CROSS_COMPILE),)
 269 $(CROSS_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)       \
 270                     $(BPFOBJ) | $(BUILD_DIR)/bpftool
 271         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                         \
 272                     ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE)                 \
 273                     EXTRA_CFLAGS='-g -O0'                                       \
 274                     OUTPUT=$(BUILD_DIR)/bpftool/                                \
 275                     LIBBPF_OUTPUT=$(BUILD_DIR)/libbpf/                          \
 276                     LIBBPF_DESTDIR=$(SCRATCH_DIR)/                              \
 277                     prefix= DESTDIR=$(SCRATCH_DIR)/ install-bin
 278 endif
 279
 280 all: docs
 281
 282 docs:
 283         $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)    \
 284                     -f Makefile.docs                                    \
 285                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 286
 287 docs-clean:
 288         $(Q)$(MAKE) $(submake_extras)                                   \
 289                     -f Makefile.docs                                    \
 290                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 291
 292 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                     \
 293            $(APIDIR)/linux/bpf.h                                               \
 294            | $(BUILD_DIR)/libbpf
 295         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
 296                     EXTRA_CFLAGS='-g -O0 $(SAN_CFLAGS)'                        \
 297                     EXTRA_LDFLAGS='$(SAN_LDFLAGS)'                             \
 298                     DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
 299
 300 ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
 301 $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                \
 302                 $(APIDIR)/linux/bpf.h                                          \
 303                 | $(HOST_BUILD_DIR)/libbpf
 304         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
 305                     EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE=                 \
 306                     OUTPUT=$(HOST_BUILD_DIR)/libbpf/                           \
 307                     CC="$(HOSTCC)" LD="$(HOSTLD)"                              \
 308                     DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
 309 endif
 310
 311 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 312 ifeq ($(VMLINUX_H),)
 313         $(call msg,GEN,,$@)
 314         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 315 else
 316         $(call msg,CP,,$@)
 317         $(Q)cp "$(VMLINUX_H)" $@
 318 endif
 319
 320 $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids    \
 321                        $(TOOLSDIR)/bpf/resolve_btfids/main.c    \
 322                        $(TOOLSDIR)/lib/rbtree.c                 \
 323                        $(TOOLSDIR)/lib/zalloc.c                 \
 324                        $(TOOLSDIR)/lib/string.c                 \
 325                        $(TOOLSDIR)/lib/ctype.c                  \
 326                        $(TOOLSDIR)/lib/str_error_r.c
 327         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
 328                 CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" \
 329                 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
 330                 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
 331
 332 # Get Clang's default includes on this system, as opposed to those seen by
 333 # '-target bpf'. This fixes "missing" files on some architectures/distros,
 334 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
 335 #
 336 # Use '-idirafter': Don't interfere with include mechanics except where the
 337 # build would have failed anyways.
 338 define get_sys_includes
 339 $(shell $(1) $(2) -v -E - </dev/null 2>&1 \
 340         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
 341 $(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') \
 342 $(shell $(1) $(2) -dM -E - </dev/null | grep '__loongarch_grlen ' | awk '{printf("-D__BITS_PER_LONG=%d", $$3)}')
 343 endef
 344
 345 # Determine target endianness.
 346 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
 347                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
 348 MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 349
 350 ifneq ($(CROSS_COMPILE),)
 351 CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
 352 endif
 353
 354 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
 355 BPF_CFLAGS = -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN)     \
 356              -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)                   \
 357              -I$(abspath $(OUTPUT)/../usr/include)
 358
 359 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
 360                -Wno-compare-distinct-pointer-types
 361
 362 $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
 363 $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
 364
 365 $(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
 366 $(OUTPUT)/cgroup_getset_retval_hooks.o: cgroup_getset_retval_hooks.h
 367
 368 # Build BPF object using Clang
 369 # $1 - input .c file
 370 # $2 - output .o file
 371 # $3 - CFLAGS
 372 define CLANG_BPF_BUILD_RULE
 373         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 374         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2
 375 endef
 376 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 377 define CLANG_NOALU32_BPF_BUILD_RULE
 378         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 379         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2
 380 endef
 381 # Build BPF object using GCC
 382 define GCC_BPF_BUILD_RULE
 383         $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
 384         $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
 385 endef
 386
 387 SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 388
 389 LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h           \
 390                 linked_vars.skel.h linked_maps.skel.h                   \
 391                 test_subskeleton.skel.h test_subskeleton_lib.skel.h     \
 392                 test_usdt.skel.h
 393
 394 LSKELS := fentry_test.c fexit_test.c fexit_sleep.c atomics.c            \
 395         trace_printk.c trace_vprintk.c map_ptr_kern.c                   \
 396         core_kern.c core_kern_overflow.c test_ringbuf.c                 \
 397         test_ringbuf_map_key.c
 398
 399 # Generate both light skeleton and libbpf skeleton for these
 400 LSKELS_EXTRA := test_ksyms_module.c test_ksyms_weak.c kfunc_call_test.c \
 401         kfunc_call_test_subprog.c
 402 SKEL_BLACKLIST += $$(LSKELS)
 403
 404 test_static_linked.skel.h-deps := test_static_linked1.bpf.o test_static_linked2.bpf.o
 405 linked_funcs.skel.h-deps := linked_funcs1.bpf.o linked_funcs2.bpf.o
 406 linked_vars.skel.h-deps := linked_vars1.bpf.o linked_vars2.bpf.o
 407 linked_maps.skel.h-deps := linked_maps1.bpf.o linked_maps2.bpf.o
 408 # In the subskeleton case, we want the test_subskeleton_lib.subskel.h file
 409 # but that's created as a side-effect of the skel.h generation.
 410 test_subskeleton.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o test_subskeleton.bpf.o
 411 test_subskeleton_lib.skel.h-deps := test_subskeleton_lib2.bpf.o test_subskeleton_lib.bpf.o
 412 test_usdt.skel.h-deps := test_usdt.bpf.o test_usdt_multispec.bpf.o
 413 xsk_xdp_progs.skel.h-deps := xsk_xdp_progs.bpf.o
 414 xdp_hw_metadata.skel.h-deps := xdp_hw_metadata.bpf.o
 415 xdp_features.skel.h-deps := xdp_features.bpf.o
 416
 417 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 418
 419 # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
 420 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 421 # Parameters:
 422 # $1 - test runner base binary name (e.g., test_progs)
 423 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 424 define DEFINE_TEST_RUNNER
 425
 426 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
 427 TRUNNER_BINARY := $1$(if $2,-)$2
 428 TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o,       \
 429                                  $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
 430 TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,           \
 431                                  $$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
 432 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
 433 TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
 434 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 435 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))
 436 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,       \
 437                                  $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
 438                                                $$(TRUNNER_BPF_SRCS)))
 439 TRUNNER_BPF_LSKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.lskel.h, $$(LSKELS) $$(LSKELS_EXTRA))
 440 TRUNNER_BPF_SKELS_LINKED := $$(addprefix $$(TRUNNER_OUTPUT)/,$(LINKED_SKELS))
 441 TEST_GEN_FILES += $$(TRUNNER_BPF_OBJS)
 442
 443 # Evaluate rules now with extra TRUNNER_XXX variables above already defined
 444 $$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
 445
 446 endef
 447
 448 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 449 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 450 # $1 - test runner base binary name (e.g., test_progs)
 451 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 452 define DEFINE_TEST_RUNNER_RULES
 453
 454 ifeq ($($(TRUNNER_OUTPUT)-dir),)
 455 $(TRUNNER_OUTPUT)-dir := y
 456 $(TRUNNER_OUTPUT):
 457         $$(call msg,MKDIR,,$$@)
 458         $(Q)mkdir -p $$@
 459 endif
 460
 461 # ensure we set up BPF objects generation rule just once for a given
 462 # input/output directory combination
 463 ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
 464 $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
 465 $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.bpf.o:                         \
 466                      $(TRUNNER_BPF_PROGS_DIR)/%.c                       \
 467                      $(TRUNNER_BPF_PROGS_DIR)/*.h                       \
 468                      $$(INCLUDE_DIR)/vmlinux.h                          \
 469                      $(wildcard $(BPFDIR)/bpf_*.h)                      \
 470                      $(wildcard $(BPFDIR)/*.bpf.h)                      \
 471                      | $(TRUNNER_OUTPUT) $$(BPFOBJ)
 472         $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,                      \
 473                                           $(TRUNNER_BPF_CFLAGS))
 474
 475 $(TRUNNER_BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 476         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 477         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 478         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 479         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 480         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 481         $(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$@
 482         $(Q)$$(BPFTOOL) gen subskeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.bpf.o=)) > $$(@:.skel.h=.subskel.h)
 483
 484 $(TRUNNER_BPF_LSKELS): %.lskel.h: %.bpf.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 485         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 486         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked1.o) $$<
 487         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked2.o) $$(<:.o=.llinked1.o)
 488         $(Q)$$(BPFTOOL) gen object $$(<:.o=.llinked3.o) $$(<:.o=.llinked2.o)
 489         $(Q)diff $$(<:.o=.llinked2.o) $$(<:.o=.llinked3.o)
 490         $(Q)$$(BPFTOOL) gen skeleton -L $$(<:.o=.llinked3.o) name $$(notdir $$(<:.bpf.o=_lskel)) > $$@
 491
 492 $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
 493         $$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.bpf.o))
 494         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
 495         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
 496         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
 497         $(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
 498         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 499         $(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
 500         $(Q)$$(BPFTOOL) gen subskeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$(@:.skel.h=.subskel.h)
 501 endif
 502
 503 # ensure we set up tests.h header generation rule just once
 504 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 505 $(TRUNNER_TESTS_DIR)-tests-hdr := y
 506 $(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
 507         $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
 508         $$(shell (echo '/* Generated header, do not edit */';                                   \
 509                   sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\).*/DEFINE_TEST(\2)/p'     \
 510                         $(TRUNNER_TESTS_DIR)/*.c | sort ;       \
 511                  ) > $$@)
 512 endif
 513
 514 # compile individual test files
 515 # Note: we cd into output directory to ensure embedded BPF object is found
 516 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                       \
 517                       $(TRUNNER_TESTS_DIR)/%.c                          \
 518                       $(TRUNNER_EXTRA_HDRS)                             \
 519                       $(TRUNNER_BPF_OBJS)                               \
 520                       $(TRUNNER_BPF_SKELS)                              \
 521                       $(TRUNNER_BPF_LSKELS)                             \
 522                       $(TRUNNER_BPF_SKELS_LINKED)                       \
 523                       $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 524         $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
 525         $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 526
 527 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                           \
 528                        %.c                                              \
 529                        $(TRUNNER_EXTRA_HDRS)                            \
 530                        $(TRUNNER_TESTS_HDR)                             \
 531                        $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 532         $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
 533         $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
 534
 535 # non-flavored in-srctree builds receive special treatment, in particular, we
 536 # do not need to copy extra resources (see e.g. test_btf_dump_case())
 537 $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
 538 ifneq ($2:$(OUTPUT),:$(shell pwd))
 539         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
 540         $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
 541 endif
 542
 543 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                       \
 544                              $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ)           \
 545                              $(RESOLVE_BTFIDS)                          \
 546                              $(TRUNNER_BPFTOOL)                         \
 547                              | $(TRUNNER_BINARY)-extras
 548         $$(call msg,BINARY,,$$@)
 549         $(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
 550         $(Q)$(RESOLVE_BTFIDS) --btf $(TRUNNER_OUTPUT)/btf_data.bpf.o $$@
 551         $(Q)ln -sf $(if $2,..,.)/tools/build/bpftool/$(USE_BOOTSTRAP)bpftool \
 552                    $(OUTPUT)/$(if $2,$2/)bpftool
 553
 554 endef
 555
 556 # Define test_progs test runner.
 557 TRUNNER_TESTS_DIR := prog_tests
 558 TRUNNER_BPF_PROGS_DIR := progs
 559 TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c  \
 560                          network_helpers.c testing_helpers.c            \
 561                          btf_helpers.c flow_dissector_load.h            \
 562                          cap_helpers.c test_loader.c xsk.c disasm.c
 563 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko  \
 564                        $(OUTPUT)/liburandom_read.so                     \
 565                        $(OUTPUT)/xdp_synproxy                           \
 566                        $(OUTPUT)/sign-file                              \
 567                        ima_setup.sh                                     \
 568                        verify_sig_setup.sh                              \
 569                        $(wildcard progs/btf_dump_test_case_*.c)         \
 570                        $(wildcard progs/*.bpf.o)
 571 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 572 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS) -DENABLE_ATOMICS_TESTS
 573 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
 574
 575 # Define test_progs-no_alu32 test runner.
 576 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 577 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 578 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
 579
 580 # Define test_progs BPF-GCC-flavored test runner.
 581 ifneq ($(BPF_GCC),)
 582 TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE
 583 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc,)
 584 $(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc))
 585 endif
 586
 587 # Define test_maps test runner.
 588 TRUNNER_TESTS_DIR := map_tests
 589 TRUNNER_BPF_PROGS_DIR := progs
 590 TRUNNER_EXTRA_SOURCES := test_maps.c
 591 TRUNNER_EXTRA_FILES :=
 592 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 593 TRUNNER_BPF_CFLAGS :=
 594 $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 595
 596 # Define test_verifier test runner.
 597 # It is much simpler than test_maps/test_progs and sufficiently different from
 598 # them (e.g., test.h is using completely pattern), that it's worth just
 599 # explicitly defining all the rules explicitly.
 600 verifier/tests.h: verifier/*.c
 601         $(shell ( cd verifier/; \
 602                   echo '/* Generated header, do not edit */'; \
 603                   echo '#ifdef FILL_ARRAY'; \
 604                   ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
 605                   echo '#endif' \
 606                 ) > verifier/tests.h)
 607 $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 608         $(call msg,BINARY,,$@)
 609         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 610
 611 $(OUTPUT)/xskxceiver: xskxceiver.c $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
 612         $(call msg,BINARY,,$@)
 613         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 614
 615 $(OUTPUT)/xdp_hw_metadata: xdp_hw_metadata.c $(OUTPUT)/network_helpers.o $(OUTPUT)/xsk.o $(OUTPUT)/xdp_hw_metadata.skel.h | $(OUTPUT)
 616         $(call msg,BINARY,,$@)
 617         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 618
 619 $(OUTPUT)/xdp_features: xdp_features.c $(OUTPUT)/network_helpers.o $(OUTPUT)/xdp_features.skel.h | $(OUTPUT)
 620         $(call msg,BINARY,,$@)
 621         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 622
 623 # Make sure we are able to include and link libbpf against c++.
 624 $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
 625         $(call msg,CXX,,$@)
 626         $(Q)$(CXX) $(CFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
 627
 628 # Benchmark runner
 629 $(OUTPUT)/bench_%.o: benchs/bench_%.c bench.h $(BPFOBJ)
 630         $(call msg,CC,,$@)
 631         $(Q)$(CC) $(CFLAGS) -O2 -c $(filter %.c,$^) $(LDLIBS) -o $@
 632 $(OUTPUT)/bench_rename.o: $(OUTPUT)/test_overhead.skel.h
 633 $(OUTPUT)/bench_trigger.o: $(OUTPUT)/trigger_bench.skel.h
 634 $(OUTPUT)/bench_ringbufs.o: $(OUTPUT)/ringbuf_bench.skel.h \
 635                             $(OUTPUT)/perfbuf_bench.skel.h
 636 $(OUTPUT)/bench_bloom_filter_map.o: $(OUTPUT)/bloom_filter_bench.skel.h
 637 $(OUTPUT)/bench_bpf_loop.o: $(OUTPUT)/bpf_loop_bench.skel.h
 638 $(OUTPUT)/bench_strncmp.o: $(OUTPUT)/strncmp_bench.skel.h
 639 $(OUTPUT)/bench_bpf_hashmap_full_update.o: $(OUTPUT)/bpf_hashmap_full_update_bench.skel.h
 640 $(OUTPUT)/bench_local_storage.o: $(OUTPUT)/local_storage_bench.skel.h
 641 $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o: $(OUTPUT)/local_storage_rcu_tasks_trace_bench.skel.h
 642 $(OUTPUT)/bench_bpf_hashmap_lookup.o: $(OUTPUT)/bpf_hashmap_lookup.skel.h
 643 $(OUTPUT)/bench.o: bench.h testing_helpers.h $(BPFOBJ)
 644 $(OUTPUT)/bench: LDLIBS += -lm
 645 $(OUTPUT)/bench: $(OUTPUT)/bench.o \
 646                  $(TESTING_HELPERS) \
 647                  $(TRACE_HELPERS) \
 648                  $(OUTPUT)/bench_count.o \
 649                  $(OUTPUT)/bench_rename.o \
 650                  $(OUTPUT)/bench_trigger.o \
 651                  $(OUTPUT)/bench_ringbufs.o \
 652                  $(OUTPUT)/bench_bloom_filter_map.o \
 653                  $(OUTPUT)/bench_bpf_loop.o \
 654                  $(OUTPUT)/bench_strncmp.o \
 655                  $(OUTPUT)/bench_bpf_hashmap_full_update.o \
 656                  $(OUTPUT)/bench_local_storage.o \
 657                  $(OUTPUT)/bench_local_storage_rcu_tasks_trace.o \
 658                  $(OUTPUT)/bench_bpf_hashmap_lookup.o \
 659                  #
 660         $(call msg,BINARY,,$@)
 661         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 662
 663 $(OUTPUT)/veristat.o: $(BPFOBJ)
 664 $(OUTPUT)/veristat: $(OUTPUT)/veristat.o
 665         $(call msg,BINARY,,$@)
 666         $(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
 667
 668 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)  \
 669         prog_tests/tests.h map_tests/tests.h verifier/tests.h           \
 670         feature bpftool                                                 \
 671         $(addprefix $(OUTPUT)/,*.o *.skel.h *.lskel.h *.subskel.h       \
 672                                no_alu32 bpf_gcc bpf_testmod.ko          \
 673                                liburandom_read.so)
 674
 675 .PHONY: docs docs-clean
 676
 677 # Delete partially updated (corrupted) files on error
 678 .DELETE_ON_ERROR: