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.sh \
61	test_lwt_ip_encap.sh \
62	test_tcp_check_syncookie.sh \
63	test_tc_tunnel.sh \
64	test_tc_edt.sh \
65	test_xdping.sh
66
67TEST_PROGS_EXTENDED := with_addr.sh \
68	with_tunnels.sh \
69	tcp_client.py \
70	tcp_server.py
71
72# Compile but not part of 'make run_tests'
73TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user \
74	flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
75	test_lirc_mode2_user
76
77include ../lib.mk
78
79# NOTE: $(OUTPUT) won't get default value if used before lib.mk
80TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
81all: $(TEST_CUSTOM_PROGS)
82
83$(OUTPUT)/urandom_read: $(OUTPUT)/%: %.c
84	$(CC) -o $@ $< -Wl,--build-id
85
86$(OUTPUT)/test_stub.o: test_stub.c
87	$(CC) $(TEST_PROGS_CFLAGS) $(CFLAGS) -c -o $@ $<
88
89BPFOBJ := $(OUTPUT)/libbpf.a
90
91$(TEST_GEN_PROGS): $(OUTPUT)/test_stub.o $(BPFOBJ)
92
93$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/test_stub.o $(OUTPUT)/libbpf.a
94
95$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
96$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
97$(OUTPUT)/test_sock: cgroup_helpers.c
98$(OUTPUT)/test_sock_addr: cgroup_helpers.c
99$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
100$(OUTPUT)/test_sockmap: cgroup_helpers.c
101$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c
102$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c
103$(OUTPUT)/test_progs: trace_helpers.c
104$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
105$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
106$(OUTPUT)/test_netcnt: cgroup_helpers.c
107$(OUTPUT)/test_sock_fields: cgroup_helpers.c
108$(OUTPUT)/test_sysctl: cgroup_helpers.c
109$(OUTPUT)/test_cgroup_attach: cgroup_helpers.c
110$(OUTPUT)/test_sockopt: cgroup_helpers.c
111$(OUTPUT)/test_sockopt_sk: cgroup_helpers.c
112$(OUTPUT)/test_sockopt_multi: cgroup_helpers.c
113$(OUTPUT)/test_tcp_rtt: cgroup_helpers.c
114
115.PHONY: force
116
117# force a rebuild of BPFOBJ when its dependencies are updated
118force:
119
120$(BPFOBJ): force
121	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
122
123PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
124
125# Let newer LLVM versions transparently probe the kernel for availability
126# of full BPF instruction set.
127ifeq ($(PROBE),)
128  CPU ?= probe
129else
130  CPU ?= generic
131endif
132
133# Get Clang's default includes on this system, as opposed to those seen by
134# '-target bpf'. This fixes "missing" files on some architectures/distros,
135# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
136#
137# Use '-idirafter': Don't interfere with include mechanics except where the
138# build would have failed anyways.
139CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
140	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
141
142CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
143	      $(CLANG_SYS_INCLUDES) \
144	      -Wno-compare-distinct-pointer-types \
145	      -D__TARGET_ARCH_$(SRCARCH)
146
147$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
148$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
149
150$(OUTPUT)/test_queue_map.o: test_queue_stack_map.h
151$(OUTPUT)/test_stack_map.o: test_queue_stack_map.h
152
153$(OUTPUT)/flow_dissector_load.o: flow_dissector_load.h
154$(OUTPUT)/test_progs.o: flow_dissector_load.h
155
156BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
157BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
158BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
159BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
160			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
161			  $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
162			  /bin/rm -f ./llvm_btf_verify.o)
163
164ifneq ($(BTF_LLVM_PROBE),)
165	CLANG_FLAGS += -g
166else
167ifneq ($(BTF_LLC_PROBE),)
168ifneq ($(BTF_PAHOLE_PROBE),)
169ifneq ($(BTF_OBJCOPY_PROBE),)
170	CLANG_FLAGS += -g
171	LLC_FLAGS += -mattr=dwarfris
172	DWARF2BTF = y
173endif
174endif
175endif
176endif
177
178TEST_PROGS_CFLAGS := -I. -I$(OUTPUT)
179TEST_MAPS_CFLAGS := -I. -I$(OUTPUT)
180TEST_VERIFIER_CFLAGS := -I. -I$(OUTPUT) -Iverifier
181
182ifneq ($(SUBREG_CODEGEN),)
183ALU32_BUILD_DIR = $(OUTPUT)/alu32
184TEST_CUSTOM_PROGS += $(ALU32_BUILD_DIR)/test_progs_32
185$(ALU32_BUILD_DIR):
186	mkdir -p $@
187
188$(ALU32_BUILD_DIR)/urandom_read: $(OUTPUT)/urandom_read | $(ALU32_BUILD_DIR)
189	cp $< $@
190
191$(ALU32_BUILD_DIR)/test_progs_32: test_progs.c $(OUTPUT)/libbpf.a\
192						$(ALU32_BUILD_DIR)/urandom_read \
193						| $(ALU32_BUILD_DIR)
194	$(CC) $(TEST_PROGS_CFLAGS) $(CFLAGS) \
195		-o $(ALU32_BUILD_DIR)/test_progs_32 \
196		test_progs.c test_stub.c trace_helpers.c prog_tests/*.c \
197		$(OUTPUT)/libbpf.a $(LDLIBS)
198
199$(ALU32_BUILD_DIR)/test_progs_32: $(PROG_TESTS_H)
200$(ALU32_BUILD_DIR)/test_progs_32: prog_tests/*.c
201
202$(ALU32_BUILD_DIR)/%.o: progs/%.c $(ALU32_BUILD_DIR)/test_progs_32 \
203					| $(ALU32_BUILD_DIR)
204	($(CLANG) $(CLANG_FLAGS) -O2 -target bpf -emit-llvm -c $< -o - || \
205		echo "clang failed") | \
206	$(LLC) -march=bpf -mattr=+alu32 -mcpu=$(CPU) $(LLC_FLAGS) \
207		-filetype=obj -o $@
208ifeq ($(DWARF2BTF),y)
209	$(BTF_PAHOLE) -J $@
210endif
211endif
212
213# Have one program compiled without "-target bpf" to test whether libbpf loads
214# it successfully
215$(OUTPUT)/test_xdp.o: progs/test_xdp.c
216	($(CLANG) $(CLANG_FLAGS) -O2 -emit-llvm -c $< -o - || \
217		echo "clang failed") | \
218	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
219ifeq ($(DWARF2BTF),y)
220	$(BTF_PAHOLE) -J $@
221endif
222
223$(OUTPUT)/%.o: progs/%.c
224	($(CLANG) $(CLANG_FLAGS) -O2 -target bpf -emit-llvm -c $< -o - || \
225		echo "clang failed") | \
226	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
227ifeq ($(DWARF2BTF),y)
228	$(BTF_PAHOLE) -J $@
229endif
230
231PROG_TESTS_DIR = $(OUTPUT)/prog_tests
232$(PROG_TESTS_DIR):
233	mkdir -p $@
234PROG_TESTS_H := $(PROG_TESTS_DIR)/tests.h
235PROG_TESTS_FILES := $(wildcard prog_tests/*.c)
236test_progs.c: $(PROG_TESTS_H)
237$(OUTPUT)/test_progs: CFLAGS += $(TEST_PROGS_CFLAGS)
238$(OUTPUT)/test_progs: test_progs.c $(PROG_TESTS_H) $(PROG_TESTS_FILES)
239$(PROG_TESTS_H): $(PROG_TESTS_FILES) | $(PROG_TESTS_DIR)
240	$(shell ( cd prog_tests/; \
241		  echo '/* Generated header, do not edit */'; \
242		  echo '#ifdef DECLARE'; \
243		  ls *.c 2> /dev/null | \
244			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
245		  echo '#endif'; \
246		  echo '#ifdef CALL'; \
247		  ls *.c 2> /dev/null | \
248			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
249		  echo '#endif' \
250		 ) > $(PROG_TESTS_H))
251
252MAP_TESTS_DIR = $(OUTPUT)/map_tests
253$(MAP_TESTS_DIR):
254	mkdir -p $@
255MAP_TESTS_H := $(MAP_TESTS_DIR)/tests.h
256MAP_TESTS_FILES := $(wildcard map_tests/*.c)
257test_maps.c: $(MAP_TESTS_H)
258$(OUTPUT)/test_maps: CFLAGS += $(TEST_MAPS_CFLAGS)
259$(OUTPUT)/test_maps: test_maps.c $(MAP_TESTS_H) $(MAP_TESTS_FILES)
260$(MAP_TESTS_H): $(MAP_TESTS_FILES) | $(MAP_TESTS_DIR)
261	$(shell ( cd map_tests/; \
262		  echo '/* Generated header, do not edit */'; \
263		  echo '#ifdef DECLARE'; \
264		  ls *.c 2> /dev/null | \
265			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
266		  echo '#endif'; \
267		  echo '#ifdef CALL'; \
268		  ls *.c 2> /dev/null | \
269			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
270		  echo '#endif' \
271		 ) > $(MAP_TESTS_H))
272
273VERIFIER_TESTS_DIR = $(OUTPUT)/verifier
274$(VERIFIER_TESTS_DIR):
275	mkdir -p $@
276VERIFIER_TESTS_H := $(VERIFIER_TESTS_DIR)/tests.h
277VERIFIER_TEST_FILES := $(wildcard verifier/*.c)
278test_verifier.c: $(VERIFIER_TESTS_H)
279$(OUTPUT)/test_verifier: CFLAGS += $(TEST_VERIFIER_CFLAGS)
280$(OUTPUT)/test_verifier: test_verifier.c $(VERIFIER_TESTS_H)
281$(VERIFIER_TESTS_H): $(VERIFIER_TEST_FILES) | $(VERIFIER_TESTS_DIR)
282	$(shell ( cd verifier/; \
283		  echo '/* Generated header, do not edit */'; \
284		  echo '#ifdef FILL_ARRAY'; \
285		  ls *.c 2> /dev/null | \
286			sed -e 's@\(.*\)@#include \"\1\"@'; \
287		  echo '#endif' \
288		 ) > $(VERIFIER_TESTS_H))
289
290EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
291	$(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H) \
292	feature
293