1# SPDX-License-Identifier: GPL-2.0
2include ../../../../scripts/Kbuild.include
3include ../../../scripts/Makefile.arch
4
5LIBDIR := ../../../lib
6BPFDIR := $(LIBDIR)/bpf
7APIDIR := ../../../include/uapi
8GENDIR := ../../../../include/generated
9GENHDR := $(GENDIR)/autoconf.h
10
11ifneq ($(wildcard $(GENHDR)),)
12  GENFLAGS := -DHAVE_GENHDR
13endif
14
15CLANG		?= clang
16LLC		?= llc
17LLVM_OBJCOPY	?= llvm-objcopy
18LLVM_READELF	?= llvm-readelf
19BTF_PAHOLE	?= pahole
20CFLAGS += -g -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include \
21	  -Dbpf_prog_load=bpf_prog_test_load \
22	  -Dbpf_load_program=bpf_test_load_program
23LDLIBS += -lcap -lelf -lrt -lpthread
24
25# Order correspond to 'make run_tests' order
26TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
27	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
28	test_sock test_btf test_sockmap get_cgroup_id_user test_socket_cookie \
29	test_cgroup_storage test_select_reuseport test_section_names \
30	test_netcnt test_tcpnotify_user test_sock_fields test_sysctl test_hashmap \
31	test_btf_dump test_cgroup_attach xdping test_sockopt test_sockopt_sk \
32	test_sockopt_multi test_tcp_rtt
33
34BPF_OBJ_FILES = $(patsubst %.c,%.o, $(notdir $(wildcard progs/*.c)))
35TEST_GEN_FILES = $(BPF_OBJ_FILES)
36
37# Also test sub-register code-gen if LLVM has eBPF v3 processor support which
38# contains both ALU32 and JMP32 instructions.
39SUBREG_CODEGEN := $(shell echo "int cal(int a) { return a > 0; }" | \
40			$(CLANG) -target bpf -O2 -emit-llvm -S -x c - -o - | \
41			$(LLC) -mattr=+alu32 -mcpu=v3 2>&1 | \
42			grep 'if w')
43ifneq ($(SUBREG_CODEGEN),)
44TEST_GEN_FILES += $(patsubst %.o,alu32/%.o, $(BPF_OBJ_FILES))
45endif
46
47# Order correspond to 'make run_tests' order
48TEST_PROGS := test_kmod.sh \
49	test_libbpf.sh \
50	test_xdp_redirect.sh \
51	test_xdp_meta.sh \
52	test_xdp_veth.sh \
53	test_offload.py \
54	test_sock_addr.sh \
55	test_tunnel.sh \
56	test_lwt_seg6local.sh \
57	test_lirc_mode2.sh \
58	test_skb_cgroup_id.sh \
59	test_flow_dissector.sh \
60	test_xdp_vlan_mode_generic.sh \
61	test_xdp_vlan_mode_native.sh \
62	test_lwt_ip_encap.sh \
63	test_tcp_check_syncookie.sh \
64	test_tc_tunnel.sh \
65	test_tc_edt.sh \
66	test_xdping.sh
67
68TEST_PROGS_EXTENDED := with_addr.sh \
69	with_tunnels.sh \
70	tcp_client.py \
71	tcp_server.py
72
73# Compile but not part of 'make run_tests'
74TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user \
75	flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
76	test_lirc_mode2_user
77
78include ../lib.mk
79
80# NOTE: $(OUTPUT) won't get default value if used before lib.mk
81TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
82all: $(TEST_CUSTOM_PROGS)
83
84$(OUTPUT)/urandom_read: $(OUTPUT)/%: %.c
85	$(CC) -o $@ $< -Wl,--build-id
86
87$(OUTPUT)/test_stub.o: test_stub.c
88	$(CC) $(TEST_PROGS_CFLAGS) $(CFLAGS) -c -o $@ $<
89
90BPFOBJ := $(OUTPUT)/libbpf.a
91
92$(TEST_GEN_PROGS): $(OUTPUT)/test_stub.o $(BPFOBJ)
93
94$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(OUTPUT)/libbpf.a
95
96$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
97$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
98$(OUTPUT)/test_sock: cgroup_helpers.c
99$(OUTPUT)/test_sock_addr: cgroup_helpers.c
100$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
101$(OUTPUT)/test_sockmap: cgroup_helpers.c
102$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c
103$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
104$(OUTPUT)/test_progs: trace_helpers.c
105$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
106$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
107$(OUTPUT)/test_netcnt: cgroup_helpers.c
108$(OUTPUT)/test_sock_fields: cgroup_helpers.c
109$(OUTPUT)/test_sysctl: cgroup_helpers.c
110$(OUTPUT)/test_cgroup_attach: cgroup_helpers.c
111$(OUTPUT)/test_sockopt: cgroup_helpers.c
112$(OUTPUT)/test_sockopt_sk: cgroup_helpers.c
113$(OUTPUT)/test_sockopt_multi: cgroup_helpers.c
114$(OUTPUT)/test_tcp_rtt: cgroup_helpers.c
115
116.PHONY: force
117
118# force a rebuild of BPFOBJ when its dependencies are updated
119force:
120
121$(BPFOBJ): force
122	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
123
124PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
125
126# Let newer LLVM versions transparently probe the kernel for availability
127# of full BPF instruction set.
128ifeq ($(PROBE),)
129  CPU ?= probe
130else
131  CPU ?= generic
132endif
133
134# Get Clang's default includes on this system, as opposed to those seen by
135# '-target bpf'. This fixes "missing" files on some architectures/distros,
136# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
137#
138# Use '-idirafter': Don't interfere with include mechanics except where the
139# build would have failed anyways.
140CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
141	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
142
143CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
144	      $(CLANG_SYS_INCLUDES) \
145	      -Wno-compare-distinct-pointer-types \
146	      -D__TARGET_ARCH_$(SRCARCH)
147
148$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
149$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
150
151$(OUTPUT)/test_queue_map.o: test_queue_stack_map.h
152$(OUTPUT)/test_stack_map.o: test_queue_stack_map.h
153
154$(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
155$(OUTPUT)/test_progs.o: flow_dissector_load.h
156
157BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
158BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
159BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
160BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
161			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
162			  $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
163			  /bin/rm -f ./llvm_btf_verify.o)
164
165ifneq ($(BTF_LLVM_PROBE),)
166	CLANG_FLAGS += -g
167else
168ifneq ($(BTF_LLC_PROBE),)
169ifneq ($(BTF_PAHOLE_PROBE),)
170ifneq ($(BTF_OBJCOPY_PROBE),)
171	CLANG_FLAGS += -g
172	LLC_FLAGS += -mattr=dwarfris
173	DWARF2BTF = y
174endif
175endif
176endif
177endif
178
179TEST_PROGS_CFLAGS := -I. -I$(OUTPUT)
180TEST_MAPS_CFLAGS := -I. -I$(OUTPUT)
181TEST_VERIFIER_CFLAGS := -I. -I$(OUTPUT) -Iverifier
182
183ifneq ($(SUBREG_CODEGEN),)
184ALU32_BUILD_DIR = $(OUTPUT)/alu32
185TEST_CUSTOM_PROGS += $(ALU32_BUILD_DIR)/test_progs_32
186$(ALU32_BUILD_DIR):
187	mkdir -p $@
188
189$(ALU32_BUILD_DIR)/urandom_read: $(OUTPUT)/urandom_read | $(ALU32_BUILD_DIR)
190	cp $< $@
191
192$(ALU32_BUILD_DIR)/test_progs_32: test_progs.c $(OUTPUT)/libbpf.a\
193						$(ALU32_BUILD_DIR)/urandom_read \
194						| $(ALU32_BUILD_DIR)
195	$(CC) $(TEST_PROGS_CFLAGS) $(CFLAGS) \
196		-o $(ALU32_BUILD_DIR)/test_progs_32 \
197		test_progs.c test_stub.c trace_helpers.c prog_tests/*.c \
198		$(OUTPUT)/libbpf.a $(LDLIBS)
199
200$(ALU32_BUILD_DIR)/test_progs_32: $(PROG_TESTS_H)
201$(ALU32_BUILD_DIR)/test_progs_32: prog_tests/*.c
202
203$(ALU32_BUILD_DIR)/%.o: progs/%.c $(ALU32_BUILD_DIR)/test_progs_32 \
204					| $(ALU32_BUILD_DIR)
205	($(CLANG) $(CLANG_FLAGS) -O2 -target bpf -emit-llvm -c $< -o - || \
206		echo "clang failed") | \
207	$(LLC) -march=bpf -mattr=+alu32 -mcpu=$(CPU) $(LLC_FLAGS) \
208		-filetype=obj -o $@
209ifeq ($(DWARF2BTF),y)
210	$(BTF_PAHOLE) -J $@
211endif
212endif
213
214# Have one program compiled without "-target bpf" to test whether libbpf loads
215# it successfully
216$(OUTPUT)/test_xdp.o: progs/test_xdp.c
217	($(CLANG) $(CLANG_FLAGS) -O2 -emit-llvm -c $< -o - || \
218		echo "clang failed") | \
219	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
220ifeq ($(DWARF2BTF),y)
221	$(BTF_PAHOLE) -J $@
222endif
223
224$(OUTPUT)/%.o: progs/%.c
225	($(CLANG) $(CLANG_FLAGS) -O2 -target bpf -emit-llvm -c $< -o - || \
226		echo "clang failed") | \
227	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
228ifeq ($(DWARF2BTF),y)
229	$(BTF_PAHOLE) -J $@
230endif
231
232PROG_TESTS_DIR = $(OUTPUT)/prog_tests
233$(PROG_TESTS_DIR):
234	mkdir -p $@
235PROG_TESTS_H := $(PROG_TESTS_DIR)/tests.h
236PROG_TESTS_FILES := $(wildcard prog_tests/*.c)
237test_progs.c: $(PROG_TESTS_H)
238$(OUTPUT)/test_progs: CFLAGS += $(TEST_PROGS_CFLAGS)
239$(OUTPUT)/test_progs: test_progs.c $(PROG_TESTS_H) $(PROG_TESTS_FILES)
240$(PROG_TESTS_H): $(PROG_TESTS_FILES) | $(PROG_TESTS_DIR)
241	$(shell ( cd prog_tests/; \
242		  echo '/* Generated header, do not edit */'; \
243		  echo '#ifdef DECLARE'; \
244		  ls *.c 2> /dev/null | \
245			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
246		  echo '#endif'; \
247		  echo '#ifdef CALL'; \
248		  ls *.c 2> /dev/null | \
249			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
250		  echo '#endif' \
251		 ) > $(PROG_TESTS_H))
252
253MAP_TESTS_DIR = $(OUTPUT)/map_tests
254$(MAP_TESTS_DIR):
255	mkdir -p $@
256MAP_TESTS_H := $(MAP_TESTS_DIR)/tests.h
257MAP_TESTS_FILES := $(wildcard map_tests/*.c)
258test_maps.c: $(MAP_TESTS_H)
259$(OUTPUT)/test_maps: CFLAGS += $(TEST_MAPS_CFLAGS)
260$(OUTPUT)/test_maps: test_maps.c $(MAP_TESTS_H) $(MAP_TESTS_FILES)
261$(MAP_TESTS_H): $(MAP_TESTS_FILES) | $(MAP_TESTS_DIR)
262	$(shell ( cd map_tests/; \
263		  echo '/* Generated header, do not edit */'; \
264		  echo '#ifdef DECLARE'; \
265		  ls *.c 2> /dev/null | \
266			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
267		  echo '#endif'; \
268		  echo '#ifdef CALL'; \
269		  ls *.c 2> /dev/null | \
270			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
271		  echo '#endif' \
272		 ) > $(MAP_TESTS_H))
273
274VERIFIER_TESTS_DIR = $(OUTPUT)/verifier
275$(VERIFIER_TESTS_DIR):
276	mkdir -p $@
277VERIFIER_TESTS_H := $(VERIFIER_TESTS_DIR)/tests.h
278VERIFIER_TEST_FILES := $(wildcard verifier/*.c)
279test_verifier.c: $(VERIFIER_TESTS_H)
280$(OUTPUT)/test_verifier: CFLAGS += $(TEST_VERIFIER_CFLAGS)
281$(OUTPUT)/test_verifier: test_verifier.c $(VERIFIER_TESTS_H)
282$(VERIFIER_TESTS_H): $(VERIFIER_TEST_FILES) | $(VERIFIER_TESTS_DIR)
283	$(shell ( cd verifier/; \
284		  echo '/* Generated header, do not edit */'; \
285		  echo '#ifdef FILL_ARRAY'; \
286		  ls *.c 2> /dev/null | \
287			sed -e 's@\(.*\)@#include \"\1\"@'; \
288		  echo '#endif' \
289		 ) > $(VERIFIER_TESTS_H))
290
291EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
292	$(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H) \
293	feature
294