1 # SPDX-License-Identifier: GPL-2.0
2
3 BPF_SAMPLES_PATH ?= $(abspath $(src))
4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
5
6 pound := \#
7
8 # List of programs to build
9 tprogs-y := test_lru_dist
10 tprogs-y += sock_example
11 tprogs-y += fds_example
12 tprogs-y += sockex1
13 tprogs-y += sockex2
14 tprogs-y += sockex3
15 tprogs-y += tracex1
16 tprogs-y += tracex3
17 tprogs-y += tracex4
18 tprogs-y += tracex5
19 tprogs-y += tracex6
20 tprogs-y += tracex7
21 tprogs-y += test_probe_write_user
22 tprogs-y += trace_output
23 tprogs-y += lathist
24 tprogs-y += offwaketime
25 tprogs-y += spintest
26 tprogs-y += map_perf_test
27 tprogs-y += test_overhead
28 tprogs-y += test_cgrp2_array_pin
29 tprogs-y += test_cgrp2_attach
30 tprogs-y += test_cgrp2_sock
31 tprogs-y += test_cgrp2_sock2
32 tprogs-y += xdp_router_ipv4
33 tprogs-y += test_current_task_under_cgroup
34 tprogs-y += trace_event
35 tprogs-y += sampleip
36 tprogs-y += tc_l2_redirect
37 tprogs-y += lwt_len_hist
38 tprogs-y += xdp_tx_iptunnel
39 tprogs-y += test_map_in_map
40 tprogs-y += per_socket_stats_example
41 tprogs-y += syscall_tp
42 tprogs-y += cpustat
43 tprogs-y += xdp_adjust_tail
44 tprogs-y += xdp_fwd
45 tprogs-y += task_fd_query
46 tprogs-y += ibumad
47 tprogs-y += hbm
48
49 # Libbpf dependencies
50 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
51 LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
52 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
53 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
54 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
55
56 CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
57 TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
58 XDP_SAMPLE := xdp_sample_user.o
59
60 fds_example-objs := fds_example.o
61 sockex1-objs := sockex1_user.o
62 sockex2-objs := sockex2_user.o
63 sockex3-objs := sockex3_user.o
64 tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
65 tracex3-objs := tracex3_user.o
66 tracex4-objs := tracex4_user.o
67 tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
68 tracex6-objs := tracex6_user.o
69 tracex7-objs := tracex7_user.o
70 test_probe_write_user-objs := test_probe_write_user_user.o
71 trace_output-objs := trace_output_user.o
72 lathist-objs := lathist_user.o
73 offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
74 spintest-objs := spintest_user.o $(TRACE_HELPERS)
75 map_perf_test-objs := map_perf_test_user.o
76 test_overhead-objs := test_overhead_user.o
77 test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
78 test_cgrp2_attach-objs := test_cgrp2_attach.o
79 test_cgrp2_sock-objs := test_cgrp2_sock.o
80 test_cgrp2_sock2-objs := test_cgrp2_sock2.o
81 test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
82 test_current_task_under_cgroup_user.o
83 trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
84 sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
85 tc_l2_redirect-objs := tc_l2_redirect_user.o
86 lwt_len_hist-objs := lwt_len_hist_user.o
87 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
88 test_map_in_map-objs := test_map_in_map_user.o
89 per_socket_stats_example-objs := cookie_uid_helper_example.o
90 syscall_tp-objs := syscall_tp_user.o
91 cpustat-objs := cpustat_user.o
92 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
93 xdp_fwd-objs := xdp_fwd_user.o
94 task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
95 ibumad-objs := ibumad_user.o
96 hbm-objs := hbm.o $(CGROUP_HELPERS)
97
98 xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
99
100 # Tell kbuild to always build the programs
101 always-y := $(tprogs-y)
102 always-y += sockex1_kern.o
103 always-y += sockex2_kern.o
104 always-y += sockex3_kern.o
105 always-y += tracex1.bpf.o
106 always-y += tracex3.bpf.o
107 always-y += tracex4.bpf.o
108 always-y += tracex5.bpf.o
109 always-y += tracex6.bpf.o
110 always-y += tracex7.bpf.o
111 always-y += sock_flags.bpf.o
112 always-y += test_probe_write_user.bpf.o
113 always-y += trace_output.bpf.o
114 always-y += tcbpf1_kern.o
115 always-y += tc_l2_redirect_kern.o
116 always-y += lathist_kern.o
117 always-y += offwaketime.bpf.o
118 always-y += spintest.bpf.o
119 always-y += map_perf_test.bpf.o
120 always-y += test_overhead_tp.bpf.o
121 always-y += test_overhead_raw_tp.bpf.o
122 always-y += test_overhead_kprobe.bpf.o
123 always-y += parse_varlen.o parse_simple.o parse_ldabs.o
124 always-y += test_cgrp2_tc.bpf.o
125 always-y += test_current_task_under_cgroup.bpf.o
126 always-y += trace_event_kern.o
127 always-y += sampleip_kern.o
128 always-y += lwt_len_hist.bpf.o
129 always-y += xdp_tx_iptunnel_kern.o
130 always-y += test_map_in_map.bpf.o
131 always-y += tcp_synrto_kern.o
132 always-y += tcp_rwnd_kern.o
133 always-y += tcp_bufs_kern.o
134 always-y += tcp_cong_kern.o
135 always-y += tcp_iw_kern.o
136 always-y += tcp_clamp_kern.o
137 always-y += tcp_basertt_kern.o
138 always-y += tcp_tos_reflect_kern.o
139 always-y += tcp_dumpstats_kern.o
140 always-y += xdp2skb_meta_kern.o
141 always-y += syscall_tp_kern.o
142 always-y += cpustat_kern.o
143 always-y += xdp_adjust_tail_kern.o
144 always-y += xdp_fwd_kern.o
145 always-y += task_fd_query_kern.o
146 always-y += ibumad_kern.o
147 always-y += hbm_out_kern.o
148 always-y += hbm_edt_kern.o
149
150 TPROGS_CFLAGS = $(TPROGS_USER_CFLAGS)
151 TPROGS_LDFLAGS = $(TPROGS_USER_LDFLAGS)
152
153 ifeq ($(ARCH), arm)
154 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
155 # headers when arm instruction set identification is requested.
156 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
157 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
158 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
159 endif
160
161 ifeq ($(ARCH), mips)
162 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
163 ifdef CONFIG_MACH_LOONGSON64
164 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
165 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
166 endif
167 endif
168
169 ifeq ($(ARCH), x86)
170 BPF_EXTRA_CFLAGS += -fcf-protection
171 endif
172
173 TPROGS_CFLAGS += -Wall -O2
174 TPROGS_CFLAGS += -Wmissing-prototypes
175 TPROGS_CFLAGS += -Wstrict-prototypes
176 TPROGS_CFLAGS += $(call try-run,\
177 printf "int main() { return 0; }" |\
178 $(CC) -Werror -fsanitize=bounds -x c - -o "$$TMP",-fsanitize=bounds,)
179
180 TPROGS_CFLAGS += -I$(objtree)/usr/include
181 TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
182 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
183 TPROGS_CFLAGS += -I$(srctree)/tools/include
184 TPROGS_CFLAGS += -I$(srctree)/tools/perf
185 TPROGS_CFLAGS += -I$(srctree)/tools/lib
186 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
187
188 ifdef SYSROOT
189 TPROGS_CFLAGS += --sysroot=$(SYSROOT)
190 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
191 endif
192
193 TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
194 TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread
195 TPROGLDLIBS_tracex4 += -lrt
196 TPROGLDLIBS_trace_output += -lrt
197 TPROGLDLIBS_map_perf_test += -lrt
198 TPROGLDLIBS_test_overhead += -lrt
199
200 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
201 # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
202 LLC ?= llc
203 CLANG ?= clang
204 OPT ?= opt
205 LLVM_DIS ?= llvm-dis
206 LLVM_OBJCOPY ?= llvm-objcopy
207 LLVM_READELF ?= llvm-readelf
208 BTF_PAHOLE ?= pahole
209
210 # Detect that we're cross compiling and use the cross compiler
211 ifdef CROSS_COMPILE
212 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
213 endif
214
215 # Don't evaluate probes and warnings if we need to run make recursively
216 ifneq ($(src),)
217 HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
218 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
219 -o /dev/null 2>/dev/null && echo okay)
220
221 ifeq ($(HDR_PROBE),)
222 $(warning WARNING: Detected possible issues with include path.)
223 $(warning WARNING: Please install kernel headers locally (make headers_install).)
224 endif
225
226 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
227 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
228 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
229 BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
230 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
231 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
232 /bin/rm -f ./llvm_btf_verify.o)
233
234 BPF_EXTRA_CFLAGS += -fno-stack-protector
235 ifneq ($(BTF_LLVM_PROBE),)
236 BPF_EXTRA_CFLAGS += -g
237 else
238 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
239 BPF_EXTRA_CFLAGS += -g
240 LLC_FLAGS += -mattr=dwarfris
241 DWARF2BTF = y
242 endif
243 endif
244 endif
245
246 # Trick to allow make to be run from this directory
247 all:
248 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
249
250 clean:
251 $(MAKE) -C ../../ M=$(CURDIR) clean
252 @find $(CURDIR) -type f -name '*~' -delete
253 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
254
255 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
256 # Fix up variables inherited from Kbuild that tools/ build system won't like
257 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
258 LDFLAGS="$(TPROGS_LDFLAGS)" srctree=$(BPF_SAMPLES_PATH)/../../ \
259 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
260 $@ install_headers
261
262 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
263 BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
264 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
265 BPFTOOL ?= $(DEFAULT_BPFTOOL)
266 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
267 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
268 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
269
270 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
271 $(call msg,MKDIR,$@)
272 $(Q)mkdir -p $@
273
274 $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
275 $(call filechk,offsets,__SYSCALL_NRS_H__)
276
277 targets += syscall_nrs.s
278 clean-files += syscall_nrs.h
279
280 FORCE:
281
282
283 # Verify LLVM compiler tools are available and bpf target is supported by llc
284 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
285
286 verify_cmds: $(CLANG) $(LLC)
287 @for TOOL in $^ ; do \
288 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
289 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
290 exit 1; \
291 else true; fi; \
292 done
293
294 verify_target_bpf: verify_cmds
295 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
296 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
297 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
298 exit 2; \
299 else true; fi
300
301 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
302 $(src)/*.c: verify_target_bpf $(LIBBPF)
303
304 libbpf_hdrs: $(LIBBPF)
305 $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
306
307 .PHONY: libbpf_hdrs
308
309 $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
310
311 $(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h
312 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
313 $(obj)/hbm.o: $(src)/hbm.h
314 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
315
316 # Override includes for xdp_sample_user.o because $(srctree)/usr/include in
317 # TPROGS_CFLAGS causes conflicts
318 XDP_SAMPLE_CFLAGS += -Wall -O2 \
319 -I$(src)/../../tools/include \
320 -I$(src)/../../tools/include/uapi \
321 -I$(LIBBPF_INCLUDE) \
322 -I$(src)/../../tools/testing/selftests/bpf
323
324 $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) $(TPROGS_USER_CFLAGS)
325 $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
326 # Override includes for trace_helpers.o because __must_check won't be defined
327 # in our include path.
328 $(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check=
329
330 -include $(BPF_SAMPLES_PATH)/Makefile.target
331
332 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \
333 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \
334 $(abspath ./vmlinux)
335 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
336
337 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
338 ifeq ($(VMLINUX_H),)
339 ifeq ($(VMLINUX_BTF),)
340 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
341 build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable)
342 endif
343 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
344 else
345 $(Q)cp "$(VMLINUX_H)" $@
346 endif
347
348 clean-files += vmlinux.h
349
350 # Get Clang's default includes on this system, as opposed to those seen by
351 # '--target=bpf'. This fixes "missing" files on some architectures/distros,
352 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
353 #
354 # Use '-idirafter': Don't interfere with include mechanics except where the
355 # build would have failed anyways.
356 define get_sys_includes
357 $(shell $(1) -v -E - </dev/null 2>&1 \
358 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
359 $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
360 endef
361
362 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
363
364 $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
365
366 $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
367 @echo " CLANG-BPF " $@
368 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \
369 -Wno-compare-distinct-pointer-types -I$(srctree)/include \
370 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
371 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
372 -c $(filter %.bpf.c,$^) -o $@
373
374 LINKED_SKELS := xdp_router_ipv4.skel.h
375 clean-files += $(LINKED_SKELS)
376
377 xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
378
379 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
380
381 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
382 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
383 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
384
385 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
386 @echo " BPF GEN-OBJ " $(@:.skel.h=)
387 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
388 @echo " BPF GEN-SKEL" $(@:.skel.h=)
389 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@
390
391 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
392 # But, there is no easy way to fix it, so just exclude it since it is
393 # useless for BPF samples.
394 # below we use long chain of commands, clang | opt | llvm-dis | llc,
395 # to generate final object file. 'clang' compiles the source into IR
396 # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
397 # processing (llvm12) and IR optimizations. 'llvm-dis' converts
398 # 'opt' output to IR, and finally 'llc' generates bpf byte code.
399 $(obj)/%.o: $(src)/%.c
400 @echo " CLANG-bpf " $@
401 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
402 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
403 -I$(LIBBPF_INCLUDE) \
404 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
405 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
406 -Wno-gnu-variable-sized-type-not-at-end \
407 -Wno-address-of-packed-member -Wno-tautological-compare \
408 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
409 -fno-asynchronous-unwind-tables \
410 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
411 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
412 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
413 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
414 ifeq ($(DWARF2BTF),y)
415 $(BTF_PAHOLE) -J $@
416 endif
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