1 # SPDX-License-Identifier: GPL-2.0
3 BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
8 # List of programs to build
9 tprogs-y := test_lru_dist
10 tprogs-y += sock_example
11 tprogs-y += fds_example
22 tprogs-y += test_probe_write_user
23 tprogs-y += trace_output
25 tprogs-y += offwaketime
27 tprogs-y += map_perf_test
28 tprogs-y += test_overhead
29 tprogs-y += test_cgrp2_array_pin
30 tprogs-y += test_cgrp2_attach
31 tprogs-y += test_cgrp2_sock
32 tprogs-y += test_cgrp2_sock2
33 tprogs-y += xdp_router_ipv4
34 tprogs-y += test_current_task_under_cgroup
35 tprogs-y += trace_event
37 tprogs-y += tc_l2_redirect
38 tprogs-y += lwt_len_hist
39 tprogs-y += xdp_tx_iptunnel
40 tprogs-y += test_map_in_map
41 tprogs-y += per_socket_stats_example
42 tprogs-y += syscall_tp
44 tprogs-y += xdp_adjust_tail
46 tprogs-y += task_fd_query
51 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
52 LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
53 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
54 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
55 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
57 CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
58 TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
59 XDP_SAMPLE := xdp_sample_user.o
61 fds_example-objs := fds_example.o
62 sockex1-objs := sockex1_user.o
63 sockex2-objs := sockex2_user.o
64 sockex3-objs := sockex3_user.o
65 tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
66 tracex2-objs := tracex2_user.o
67 tracex3-objs := tracex3_user.o
68 tracex4-objs := tracex4_user.o
69 tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
70 tracex6-objs := tracex6_user.o
71 tracex7-objs := tracex7_user.o
72 test_probe_write_user-objs := test_probe_write_user_user.o
73 trace_output-objs := trace_output_user.o
74 lathist-objs := lathist_user.o
75 offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
76 spintest-objs := spintest_user.o $(TRACE_HELPERS)
77 map_perf_test-objs := map_perf_test_user.o
78 test_overhead-objs := test_overhead_user.o
79 test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
80 test_cgrp2_attach-objs := test_cgrp2_attach.o
81 test_cgrp2_sock-objs := test_cgrp2_sock.o
82 test_cgrp2_sock2-objs := test_cgrp2_sock2.o
83 test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
84 test_current_task_under_cgroup_user.o
85 trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
86 sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
87 tc_l2_redirect-objs := tc_l2_redirect_user.o
88 lwt_len_hist-objs := lwt_len_hist_user.o
89 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
90 test_map_in_map-objs := test_map_in_map_user.o
91 per_socket_stats_example-objs := cookie_uid_helper_example.o
92 syscall_tp-objs := syscall_tp_user.o
93 cpustat-objs := cpustat_user.o
94 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
95 xdp_fwd-objs := xdp_fwd_user.o
96 task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
97 ibumad-objs := ibumad_user.o
98 hbm-objs := hbm.o $(CGROUP_HELPERS)
100 xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
102 # Tell kbuild to always build the programs
103 always-y := $(tprogs-y)
104 always-y += sockex1_kern.o
105 always-y += sockex2_kern.o
106 always-y += sockex3_kern.o
107 always-y += tracex1.bpf.o
108 always-y += tracex2.bpf.o
109 always-y += tracex3.bpf.o
110 always-y += tracex4.bpf.o
111 always-y += tracex5.bpf.o
112 always-y += tracex6.bpf.o
113 always-y += tracex7.bpf.o
114 always-y += sock_flags.bpf.o
115 always-y += test_probe_write_user.bpf.o
116 always-y += trace_output.bpf.o
117 always-y += tcbpf1_kern.o
118 always-y += tc_l2_redirect_kern.o
119 always-y += lathist_kern.o
120 always-y += offwaketime.bpf.o
121 always-y += spintest.bpf.o
122 always-y += map_perf_test.bpf.o
123 always-y += test_overhead_tp.bpf.o
124 always-y += test_overhead_raw_tp.bpf.o
125 always-y += test_overhead_kprobe.bpf.o
126 always-y += parse_varlen.o parse_simple.o parse_ldabs.o
127 always-y += test_cgrp2_tc.bpf.o
128 always-y += test_current_task_under_cgroup.bpf.o
129 always-y += trace_event_kern.o
130 always-y += sampleip_kern.o
131 always-y += lwt_len_hist.bpf.o
132 always-y += xdp_tx_iptunnel_kern.o
133 always-y += test_map_in_map.bpf.o
134 always-y += tcp_synrto_kern.o
135 always-y += tcp_rwnd_kern.o
136 always-y += tcp_bufs_kern.o
137 always-y += tcp_cong_kern.o
138 always-y += tcp_iw_kern.o
139 always-y += tcp_clamp_kern.o
140 always-y += tcp_basertt_kern.o
141 always-y += tcp_tos_reflect_kern.o
142 always-y += tcp_dumpstats_kern.o
143 always-y += xdp2skb_meta_kern.o
144 always-y += syscall_tp_kern.o
145 always-y += cpustat_kern.o
146 always-y += xdp_adjust_tail_kern.o
147 always-y += xdp_fwd_kern.o
148 always-y += task_fd_query_kern.o
149 always-y += ibumad_kern.o
150 always-y += hbm_out_kern.o
151 always-y += hbm_edt_kern.o
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 += $(ARM_ARCH_SELECTOR)
162 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
163 ifdef CONFIG_MACH_LOONGSON64
164 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
165 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
169 TPROGS_CFLAGS += -Wall -O2
170 TPROGS_CFLAGS += -Wmissing-prototypes
171 TPROGS_CFLAGS += -Wstrict-prototypes
173 TPROGS_CFLAGS += -I$(objtree)/usr/include
174 TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
175 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
176 TPROGS_CFLAGS += -I$(srctree)/tools/include
177 TPROGS_CFLAGS += -I$(srctree)/tools/perf
178 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
181 TPROGS_CFLAGS += --sysroot=$(SYSROOT)
182 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
185 TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
186 TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread
187 TPROGLDLIBS_tracex4 += -lrt
188 TPROGLDLIBS_trace_output += -lrt
189 TPROGLDLIBS_map_perf_test += -lrt
190 TPROGLDLIBS_test_overhead += -lrt
192 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
193 # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
198 LLVM_OBJCOPY ?= llvm-objcopy
199 LLVM_READELF ?= llvm-readelf
202 # Detect that we're cross compiling and use the cross compiler
204 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
207 # Don't evaluate probes and warnings if we need to run make recursively
209 HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
210 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
211 -o /dev/null 2>/dev/null && echo okay)
214 $(warning WARNING: Detected possible issues with include path.)
215 $(warning WARNING: Please install kernel headers locally (make headers_install).)
218 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
219 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
220 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
221 BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
222 $(CLANG) --target=bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
223 $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
224 /bin/rm -f ./llvm_btf_verify.o)
226 BPF_EXTRA_CFLAGS += -fno-stack-protector
227 ifneq ($(BTF_LLVM_PROBE),)
228 BPF_EXTRA_CFLAGS += -g
230 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
231 BPF_EXTRA_CFLAGS += -g
232 LLC_FLAGS += -mattr=dwarfris
238 # Trick to allow make to be run from this directory
240 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
243 $(MAKE) -C ../../ M=$(CURDIR) clean
244 @find $(CURDIR) -type f -name '*~' -delete
245 @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
247 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
248 # Fix up variables inherited from Kbuild that tools/ build system won't like
249 $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
250 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \
251 O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
254 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
255 BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
256 BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
257 $(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
258 $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
259 OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
261 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
265 $(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
266 $(call filechk,offsets,__SYSCALL_NRS_H__)
268 targets += syscall_nrs.s
269 clean-files += syscall_nrs.h
274 # Verify LLVM compiler tools are available and bpf target is supported by llc
275 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
277 verify_cmds: $(CLANG) $(LLC)
278 @for TOOL in $^ ; do \
279 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
280 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
285 verify_target_bpf: verify_cmds
286 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
287 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
288 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
292 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
293 $(src)/*.c: verify_target_bpf $(LIBBPF)
295 libbpf_hdrs: $(LIBBPF)
296 $(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
300 $(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
302 $(obj)/tracex5.bpf.o: $(obj)/syscall_nrs.h
303 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
304 $(obj)/hbm.o: $(src)/hbm.h
305 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
307 # Override includes for xdp_sample_user.o because $(srctree)/usr/include in
308 # TPROGS_CFLAGS causes conflicts
309 XDP_SAMPLE_CFLAGS += -Wall -O2 \
310 -I$(src)/../../tools/include \
311 -I$(src)/../../tools/include/uapi \
312 -I$(LIBBPF_INCLUDE) \
313 -I$(src)/../../tools/testing/selftests/bpf
315 $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
316 $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
318 -include $(BPF_SAMPLES_PATH)/Makefile.target
320 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \
321 $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \
323 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
325 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
327 ifeq ($(VMLINUX_BTF),)
328 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
329 build the kernel or set VMLINUX_BTF or VMLINUX_H variable)
331 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
333 $(Q)cp "$(VMLINUX_H)" $@
336 clean-files += vmlinux.h
338 # Get Clang's default includes on this system, as opposed to those seen by
339 # '--target=bpf'. This fixes "missing" files on some architectures/distros,
340 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
342 # Use '-idirafter': Don't interfere with include mechanics except where the
343 # build would have failed anyways.
344 define get_sys_includes
345 $(shell $(1) -v -E - </dev/null 2>&1 \
346 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
347 $(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
350 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
352 $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
354 $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
355 @echo " CLANG-BPF " $@
356 $(Q)$(CLANG) -g -O2 --target=bpf -D__TARGET_ARCH_$(SRCARCH) \
357 -Wno-compare-distinct-pointer-types -I$(srctree)/include \
358 -I$(srctree)/samples/bpf -I$(srctree)/tools/include \
359 -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
360 -c $(filter %.bpf.c,$^) -o $@
362 LINKED_SKELS := xdp_router_ipv4.skel.h
363 clean-files += $(LINKED_SKELS)
365 xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
367 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
369 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
370 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
371 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
373 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
374 @echo " BPF GEN-OBJ " $(@:.skel.h=)
375 $(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
376 @echo " BPF GEN-SKEL" $(@:.skel.h=)
377 $(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@
379 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
380 # But, there is no easy way to fix it, so just exclude it since it is
381 # useless for BPF samples.
382 # below we use long chain of commands, clang | opt | llvm-dis | llc,
383 # to generate final object file. 'clang' compiles the source into IR
384 # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
385 # processing (llvm12) and IR optimizations. 'llvm-dis' converts
386 # 'opt' output to IR, and finally 'llc' generates bpf byte code.
387 $(obj)/%.o: $(src)/%.c
388 @echo " CLANG-bpf " $@
389 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
390 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
391 -I$(LIBBPF_INCLUDE) \
392 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
393 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
394 -Wno-gnu-variable-sized-type-not-at-end \
395 -Wno-address-of-packed-member -Wno-tautological-compare \
396 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
397 -fno-asynchronous-unwind-tables -fcf-protection \
398 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
399 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
400 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
401 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
402 ifeq ($(DWARF2BTF),y)