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