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