tools/testing/selftests/bpf/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 include ../../../../scripts/Kbuild.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 := $(GENDIR)/autoconf.h
  17
  18 ifneq ($(wildcard $(GENHDR)),)
  19   GENFLAGS := -DHAVE_GENHDR
  20 endif
  21
  22 BPF_GCC         ?= $(shell command -v bpf-gcc;)
  23 SAN_CFLAGS      ?=
  24 CFLAGS += -g -O0 -rdynamic -Wall $(GENFLAGS) $(SAN_CFLAGS)              \
  25           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
  26           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)                      \
  27           -Dbpf_prog_load=bpf_prog_test_load                            \
  28           -Dbpf_load_program=bpf_test_load_program
  29 LDLIBS += -lcap -lelf -lz -lrt -lpthread
  30
  31 # Silence some warnings when compiled with clang
  32 ifneq ($(LLVM),)
  33 CFLAGS += -Wno-unused-command-line-argument
  34 endif
  35
  36 # Order correspond to 'make run_tests' order
  37 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
  38         test_verifier_log test_dev_cgroup \
  39         test_sock test_sockmap get_cgroup_id_user \
  40         test_cgroup_storage \
  41         test_netcnt test_tcpnotify_user test_sysctl \
  42         test_progs-no_alu32
  43
  44 # Also test bpf-gcc, if present
  45 ifneq ($(BPF_GCC),)
  46 TEST_GEN_PROGS += test_progs-bpf_gcc
  47 endif
  48
  49 TEST_GEN_FILES = test_lwt_ip_encap.o \
  50         test_tc_edt.o
  51 TEST_FILES = xsk_prereqs.sh \
  52         $(wildcard progs/btf_dump_test_case_*.c)
  53
  54 # Order correspond to 'make run_tests' order
  55 TEST_PROGS := test_kmod.sh \
  56         test_xdp_redirect.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
  79 TEST_PROGS_EXTENDED := with_addr.sh \
  80         with_tunnels.sh \
  81         test_xdp_vlan.sh
  82
  83 # Compile but not part of 'make run_tests'
  84 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
  85         flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
  86         test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
  87         xdpxceiver
  88
  89 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
  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) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
 111         $(Q)$(MAKE) -C bpf_testmod clean
 112         $(Q)$(MAKE) docs-clean
 113 endef
 114
 115 include ../lib.mk
 116
 117 SCRATCH_DIR := $(OUTPUT)/tools
 118 BUILD_DIR := $(SCRATCH_DIR)/build
 119 INCLUDE_DIR := $(SCRATCH_DIR)/include
 120 BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
 121 ifneq ($(CROSS_COMPILE),)
 122 HOST_BUILD_DIR          := $(BUILD_DIR)/host
 123 HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools
 124 else
 125 HOST_BUILD_DIR          := $(BUILD_DIR)
 126 HOST_SCRATCH_DIR        := $(SCRATCH_DIR)
 127 endif
 128 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
 129 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
 130
 131 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                            \
 132                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)    \
 133                      ../../../../vmlinux                                \
 134                      /sys/kernel/btf/vmlinux                            \
 135                      /boot/vmlinux-$(shell uname -r)
 136 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 137 ifeq ($(VMLINUX_BTF),)
 138 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
 139 endif
 140
 141 # Define simple and short `make test_progs`, `make test_sysctl`, etc targets
 142 # to build individual tests.
 143 # NOTE: Semicolon at the end is critical to override lib.mk's default static
 144 # rule for binaries.
 145 $(notdir $(TEST_GEN_PROGS)                                              \
 146          $(TEST_PROGS)                                                  \
 147          $(TEST_PROGS_EXTENDED)                                         \
 148          $(TEST_GEN_PROGS_EXTENDED)                                     \
 149          $(TEST_CUSTOM_PROGS)): %: $(OUTPUT)/% ;
 150
 151 # sort removes libbpf duplicates when not cross-building
 152 MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf               \
 153                $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids      \
 154                $(INCLUDE_DIR))
 155 $(MAKE_DIRS):
 156         $(call msg,MKDIR,,$@)
 157         $(Q)mkdir -p $@
 158
 159 $(OUTPUT)/%.o: %.c
 160         $(call msg,CC,,$@)
 161         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 162
 163 $(OUTPUT)/%:%.c
 164         $(call msg,BINARY,,$@)
 165         $(Q)$(LINK.c) $^ $(LDLIBS) -o $@
 166
 167 $(OUTPUT)/urandom_read: urandom_read.c
 168         $(call msg,BINARY,,$@)
 169         $(Q)$(CC) $(LDFLAGS) -o $@ $< $(LDLIBS) -Wl,--build-id=sha1
 170
 171 $(OUTPUT)/bpf_testmod.ko: $(VMLINUX_BTF) $(wildcard bpf_testmod/Makefile bpf_testmod/*.[ch])
 172         $(call msg,MOD,,$@)
 173         $(Q)$(RM) bpf_testmod/bpf_testmod.ko # force re-compilation
 174         $(Q)$(MAKE) $(submake_extras) -C bpf_testmod
 175         $(Q)cp bpf_testmod/bpf_testmod.ko $@
 176
 177 $(OUTPUT)/test_stub.o: test_stub.c $(BPFOBJ)
 178         $(call msg,CC,,$@)
 179         $(Q)$(CC) -c $(CFLAGS) -o $@ $<
 180
 181 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
 182
 183 $(OUTPUT)/runqslower: $(BPFOBJ) | $(DEFAULT_BPFTOOL)
 184         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower     \
 185                     OUTPUT=$(SCRATCH_DIR)/ VMLINUX_BTF=$(VMLINUX_BTF)   \
 186                     BPFOBJ=$(BPFOBJ) BPF_INCLUDE=$(INCLUDE_DIR) &&      \
 187                     cp $(SCRATCH_DIR)/runqslower $@
 188
 189 $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(BPFOBJ)
 190
 191 $(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
 192 $(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
 193 $(OUTPUT)/test_sock: cgroup_helpers.c
 194 $(OUTPUT)/test_sock_addr: cgroup_helpers.c
 195 $(OUTPUT)/test_sockmap: cgroup_helpers.c
 196 $(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
 197 $(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
 198 $(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
 199 $(OUTPUT)/test_netcnt: cgroup_helpers.c
 200 $(OUTPUT)/test_sock_fields: cgroup_helpers.c
 201 $(OUTPUT)/test_sysctl: cgroup_helpers.c
 202
 203 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 204 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
 205                     $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
 206         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                        \
 207                     CC=$(HOSTCC) LD=$(HOSTLD)                                  \
 208                     EXTRA_CFLAGS='-g -O0'                                      \
 209                     OUTPUT=$(HOST_BUILD_DIR)/bpftool/                          \
 210                     prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install
 211
 212 all: docs
 213
 214 docs:
 215         $(Q)RST2MAN_OPTS="--exit-status=1" $(MAKE) $(submake_extras)    \
 216                     -f Makefile.docs                                    \
 217                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 218
 219 docs-clean:
 220         $(Q)$(MAKE) $(submake_extras)                                   \
 221                     -f Makefile.docs                                    \
 222                     prefix= OUTPUT=$(OUTPUT)/ DESTDIR=$(OUTPUT)/ $@
 223
 224 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                     \
 225            ../../../include/uapi/linux/bpf.h                                   \
 226            | $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
 227         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
 228                     EXTRA_CFLAGS='-g -O0'                                      \
 229                     DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
 230
 231 ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
 232 $(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                \
 233            ../../../include/uapi/linux/bpf.h                                   \
 234            | $(INCLUDE_DIR) $(HOST_BUILD_DIR)/libbpf
 235         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
 236                     EXTRA_CFLAGS='-g -O0'                                      \
 237                     OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
 238                     DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
 239 endif
 240
 241 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 242 ifeq ($(VMLINUX_H),)
 243         $(call msg,GEN,,$@)
 244         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 245 else
 246         $(call msg,CP,,$@)
 247         $(Q)cp "$(VMLINUX_H)" $@
 248 endif
 249
 250 $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids    \
 251                        $(TOOLSDIR)/bpf/resolve_btfids/main.c    \
 252                        $(TOOLSDIR)/lib/rbtree.c                 \
 253                        $(TOOLSDIR)/lib/zalloc.c                 \
 254                        $(TOOLSDIR)/lib/string.c                 \
 255                        $(TOOLSDIR)/lib/ctype.c                  \
 256                        $(TOOLSDIR)/lib/str_error_r.c
 257         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
 258                 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
 259                 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
 260
 261 # Get Clang's default includes on this system, as opposed to those seen by
 262 # '-target bpf'. This fixes "missing" files on some architectures/distros,
 263 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
 264 #
 265 # Use '-idirafter': Don't interfere with include mechanics except where the
 266 # build would have failed anyways.
 267 define get_sys_includes
 268 $(shell $(1) -v -E - </dev/null 2>&1 \
 269         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
 270 $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
 271 endef
 272
 273 # Determine target endianness.
 274 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
 275                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
 276 MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 277
 278 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
 279 BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN)                   \
 280              -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR)                   \
 281              -I$(abspath $(OUTPUT)/../usr/include)
 282
 283 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
 284                -Wno-compare-distinct-pointer-types
 285
 286 $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS += -fno-inline
 287 $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS += -fno-inline
 288
 289 $(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
 290
 291 # Build BPF object using Clang
 292 # $1 - input .c file
 293 # $2 - output .o file
 294 # $3 - CFLAGS
 295 define CLANG_BPF_BUILD_RULE
 296         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 297         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v3
 298 endef
 299 # Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
 300 define CLANG_NOALU32_BPF_BUILD_RULE
 301         $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 302         $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -o $2 -mcpu=v2
 303 endef
 304 # Build BPF object using GCC
 305 define GCC_BPF_BUILD_RULE
 306         $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
 307         $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
 308 endef
 309
 310 SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 311
 312 LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h           \
 313                 linked_vars.skel.h linked_maps.skel.h
 314
 315 test_static_linked.skel.h-deps := test_static_linked1.o test_static_linked2.o
 316 linked_funcs.skel.h-deps := linked_funcs1.o linked_funcs2.o
 317 linked_vars.skel.h-deps := linked_vars1.o linked_vars2.o
 318 linked_maps.skel.h-deps := linked_maps1.o linked_maps2.o
 319
 320 LINKED_BPF_SRCS := $(patsubst %.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
 321
 322 # Set up extra TRUNNER_XXX "temporary" variables in the environment (relies on
 323 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 324 # Parameters:
 325 # $1 - test runner base binary name (e.g., test_progs)
 326 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 327 define DEFINE_TEST_RUNNER
 328
 329 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
 330 TRUNNER_BINARY := $1$(if $2,-)$2
 331 TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o,       \
 332                                  $$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
 333 TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,           \
 334                                  $$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
 335 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
 336 TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
 337 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 338 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, $$(TRUNNER_BPF_SRCS))
 339 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,       \
 340                                  $$(filter-out $(SKEL_BLACKLIST) $(LINKED_BPF_SRCS),\
 341                                                $$(TRUNNER_BPF_SRCS)))
 342 TRUNNER_BPF_SKELS_LINKED := $$(addprefix $$(TRUNNER_OUTPUT)/,$(LINKED_SKELS))
 343 TEST_GEN_FILES += $$(TRUNNER_BPF_OBJS)
 344
 345 # Evaluate rules now with extra TRUNNER_XXX variables above already defined
 346 $$(eval $$(call DEFINE_TEST_RUNNER_RULES,$1,$2))
 347
 348 endef
 349
 350 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 351 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 352 # $1 - test runner base binary name (e.g., test_progs)
 353 # $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
 354 define DEFINE_TEST_RUNNER_RULES
 355
 356 ifeq ($($(TRUNNER_OUTPUT)-dir),)
 357 $(TRUNNER_OUTPUT)-dir := y
 358 $(TRUNNER_OUTPUT):
 359         $$(call msg,MKDIR,,$$@)
 360         $(Q)mkdir -p $$@
 361 endif
 362
 363 # ensure we set up BPF objects generation rule just once for a given
 364 # input/output directory combination
 365 ifeq ($($(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs),)
 366 $(TRUNNER_BPF_PROGS_DIR)$(if $2,-)$2-bpfobjs := y
 367 $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o:                             \
 368                      $(TRUNNER_BPF_PROGS_DIR)/%.c                       \
 369                      $(TRUNNER_BPF_PROGS_DIR)/*.h                       \
 370                      $$(INCLUDE_DIR)/vmlinux.h                          \
 371                      $(wildcard $(BPFDIR)/bpf_*.h) | $(TRUNNER_OUTPUT)
 372         $$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,                      \
 373                                           $(TRUNNER_BPF_CFLAGS))
 374
 375 $(TRUNNER_BPF_SKELS): %.skel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 376         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 377         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked1.o) $$<
 378         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked2.o) $$(<:.o=.linked1.o)
 379         $(Q)$$(BPFTOOL) gen object $$(<:.o=.linked3.o) $$(<:.o=.linked2.o)
 380         $(Q)diff $$(<:.o=.linked2.o) $$(<:.o=.linked3.o)
 381         $(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.linked3.o) name $$(notdir $$(<:.o=)) > $$@
 382
 383 $(TRUNNER_BPF_SKELS_LINKED): $(TRUNNER_BPF_OBJS) $(BPFTOOL) | $(TRUNNER_OUTPUT)
 384         $$(call msg,LINK-BPF,$(TRUNNER_BINARY),$$(@:.skel.h=.o))
 385         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked1.o) $$(addprefix $(TRUNNER_OUTPUT)/,$$($$(@F)-deps))
 386         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked1.o)
 387         $(Q)$$(BPFTOOL) gen object $$(@:.skel.h=.linked3.o) $$(@:.skel.h=.linked2.o)
 388         $(Q)diff $$(@:.skel.h=.linked2.o) $$(@:.skel.h=.linked3.o)
 389         $$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
 390         $(Q)$$(BPFTOOL) gen skeleton $$(@:.skel.h=.linked3.o) name $$(notdir $$(@:.skel.h=)) > $$@
 391 endif
 392
 393 # ensure we set up tests.h header generation rule just once
 394 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 395 $(TRUNNER_TESTS_DIR)-tests-hdr := y
 396 $(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
 397         $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
 398         $$(shell ( cd $(TRUNNER_TESTS_DIR);                             \
 399                   echo '/* Generated header, do not edit */';           \
 400                   ls *.c 2> /dev/null |                                 \
 401                         sed -e 's@\([^\.]*\)\.c@DEFINE_TEST(\1)@';      \
 402                  ) > $$@)
 403 endif
 404
 405 # compile individual test files
 406 # Note: we cd into output directory to ensure embedded BPF object is found
 407 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                       \
 408                       $(TRUNNER_TESTS_DIR)/%.c                          \
 409                       $(TRUNNER_EXTRA_HDRS)                             \
 410                       $(TRUNNER_BPF_OBJS)                               \
 411                       $(TRUNNER_BPF_SKELS)                              \
 412                       $(TRUNNER_BPF_SKELS_LINKED)                       \
 413                       $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 414         $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
 415         $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 416
 417 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                           \
 418                        %.c                                              \
 419                        $(TRUNNER_EXTRA_HDRS)                            \
 420                        $(TRUNNER_TESTS_HDR)                             \
 421                        $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 422         $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
 423         $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
 424
 425 # non-flavored in-srctree builds receive special treatment, in particular, we
 426 # do not need to copy extra resources (see e.g. test_btf_dump_case())
 427 $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
 428 ifneq ($2:$(OUTPUT),:$(shell pwd))
 429         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
 430         $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
 431 endif
 432
 433 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                       \
 434                              $(TRUNNER_EXTRA_OBJS) $$(BPFOBJ)           \
 435                              $(RESOLVE_BTFIDS)                          \
 436                              | $(TRUNNER_BINARY)-extras
 437         $$(call msg,BINARY,,$$@)
 438         $(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
 439         $(Q)$(RESOLVE_BTFIDS) --no-fail --btf $(TRUNNER_OUTPUT)/btf_data.o $$@
 440
 441 endef
 442
 443 # Define test_progs test runner.
 444 TRUNNER_TESTS_DIR := prog_tests
 445 TRUNNER_BPF_PROGS_DIR := progs
 446 TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c  \
 447                          network_helpers.c testing_helpers.c            \
 448                          btf_helpers.c  flow_dissector_load.h
 449 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko  \
 450                        ima_setup.sh                                     \
 451                        $(wildcard progs/btf_dump_test_case_*.c)
 452 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 453 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 454 TRUNNER_BPF_CFLAGS += -DENABLE_ATOMICS_TESTS
 455 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
 456
 457 # Define test_progs-no_alu32 test runner.
 458 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 459 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 460 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
 461
 462 # Define test_progs BPF-GCC-flavored test runner.
 463 ifneq ($(BPF_GCC),)
 464 TRUNNER_BPF_BUILD_RULE := GCC_BPF_BUILD_RULE
 465 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(call get_sys_includes,gcc)
 466 $(eval $(call DEFINE_TEST_RUNNER,test_progs,bpf_gcc))
 467 endif
 468
 469 # Define test_maps test runner.
 470 TRUNNER_TESTS_DIR := map_tests
 471 TRUNNER_BPF_PROGS_DIR := progs
 472 TRUNNER_EXTRA_SOURCES := test_maps.c
 473 TRUNNER_EXTRA_FILES :=
 474 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 475 TRUNNER_BPF_CFLAGS :=
 476 $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 477
 478 # Define test_verifier test runner.
 479 # It is much simpler than test_maps/test_progs and sufficiently different from
 480 # them (e.g., test.h is using completely pattern), that it's worth just
 481 # explicitly defining all the rules explicitly.
 482 verifier/tests.h: verifier/*.c
 483         $(shell ( cd verifier/; \
 484                   echo '/* Generated header, do not edit */'; \
 485                   echo '#ifdef FILL_ARRAY'; \
 486                   ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
 487                   echo '#endif' \
 488                 ) > verifier/tests.h)
 489 $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 490         $(call msg,BINARY,,$@)
 491         $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 492
 493 # Make sure we are able to include and link libbpf against c++.
 494 $(OUTPUT)/test_cpp: test_cpp.cpp $(OUTPUT)/test_core_extern.skel.h $(BPFOBJ)
 495         $(call msg,CXX,,$@)
 496         $(Q)$(CXX) $(CFLAGS) $(filter %.a %.o %.cpp,$^) $(LDLIBS) -o $@
 497
 498 # Benchmark runner
 499 $(OUTPUT)/bench_%.o: benchs/bench_%.c bench.h
 500         $(call msg,CC,,$@)
 501         $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
 502 $(OUTPUT)/bench_rename.o: $(OUTPUT)/test_overhead.skel.h
 503 $(OUTPUT)/bench_trigger.o: $(OUTPUT)/trigger_bench.skel.h
 504 $(OUTPUT)/bench_ringbufs.o: $(OUTPUT)/ringbuf_bench.skel.h \
 505                             $(OUTPUT)/perfbuf_bench.skel.h
 506 $(OUTPUT)/bench.o: bench.h testing_helpers.h
 507 $(OUTPUT)/bench: LDLIBS += -lm
 508 $(OUTPUT)/bench: $(OUTPUT)/bench.o $(OUTPUT)/testing_helpers.o \
 509                  $(OUTPUT)/bench_count.o \
 510                  $(OUTPUT)/bench_rename.o \
 511                  $(OUTPUT)/bench_trigger.o \
 512                  $(OUTPUT)/bench_ringbufs.o
 513         $(call msg,BINARY,,$@)
 514         $(Q)$(CC) $(LDFLAGS) -o $@ $(filter %.a %.o,$^) $(LDLIBS)
 515
 516 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)  \
 517         prog_tests/tests.h map_tests/tests.h verifier/tests.h           \
 518         feature                                                         \
 519         $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc bpf_testmod.ko)
 520
 521 .PHONY: docs docs-clean