samples/bpf/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
   4 TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
   5
   6 # List of programs to build
   7 tprogs-y := test_lru_dist
   8 tprogs-y += sock_example
   9 tprogs-y += fds_example
  10 tprogs-y += sockex1
  11 tprogs-y += sockex2
  12 tprogs-y += sockex3
  13 tprogs-y += tracex1
  14 tprogs-y += tracex2
  15 tprogs-y += tracex3
  16 tprogs-y += tracex4
  17 tprogs-y += tracex5
  18 tprogs-y += tracex6
  19 tprogs-y += tracex7
  20 tprogs-y += test_probe_write_user
  21 tprogs-y += trace_output
  22 tprogs-y += lathist
  23 tprogs-y += offwaketime
  24 tprogs-y += spintest
  25 tprogs-y += map_perf_test
  26 tprogs-y += test_overhead
  27 tprogs-y += test_cgrp2_array_pin
  28 tprogs-y += test_cgrp2_attach
  29 tprogs-y += test_cgrp2_sock
  30 tprogs-y += test_cgrp2_sock2
  31 tprogs-y += xdp1
  32 tprogs-y += xdp2
  33 tprogs-y += xdp_router_ipv4
  34 tprogs-y += test_current_task_under_cgroup
  35 tprogs-y += trace_event
  36 tprogs-y += sampleip
  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 += xdp_redirect
  43 tprogs-y += xdp_redirect_map
  44 tprogs-y += xdp_redirect_cpu
  45 tprogs-y += xdp_monitor
  46 tprogs-y += xdp_rxq_info
  47 tprogs-y += syscall_tp
  48 tprogs-y += cpustat
  49 tprogs-y += xdp_adjust_tail
  50 tprogs-y += xdpsock
  51 tprogs-y += xdpsock_ctrl_proc
  52 tprogs-y += xsk_fwd
  53 tprogs-y += xdp_fwd
  54 tprogs-y += task_fd_query
  55 tprogs-y += xdp_sample_pkts
  56 tprogs-y += ibumad
  57 tprogs-y += hbm
  58
  59 # Libbpf dependencies
  60 LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
  61
  62 CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
  63 TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
  64
  65 fds_example-objs := fds_example.o
  66 sockex1-objs := sockex1_user.o
  67 sockex2-objs := sockex2_user.o
  68 sockex3-objs := sockex3_user.o
  69 tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
  70 tracex2-objs := tracex2_user.o
  71 tracex3-objs := tracex3_user.o
  72 tracex4-objs := tracex4_user.o
  73 tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
  74 tracex6-objs := tracex6_user.o
  75 tracex7-objs := tracex7_user.o
  76 test_probe_write_user-objs := test_probe_write_user_user.o
  77 trace_output-objs := trace_output_user.o
  78 lathist-objs := lathist_user.o
  79 offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
  80 spintest-objs := spintest_user.o $(TRACE_HELPERS)
  81 map_perf_test-objs := map_perf_test_user.o
  82 test_overhead-objs := test_overhead_user.o
  83 test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
  84 test_cgrp2_attach-objs := test_cgrp2_attach.o
  85 test_cgrp2_sock-objs := test_cgrp2_sock.o
  86 test_cgrp2_sock2-objs := test_cgrp2_sock2.o
  87 xdp1-objs := xdp1_user.o
  88 # reuse xdp1 source intentionally
  89 xdp2-objs := xdp1_user.o
  90 xdp_router_ipv4-objs := xdp_router_ipv4_user.o
  91 test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
  92                                        test_current_task_under_cgroup_user.o
  93 trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
  94 sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
  95 tc_l2_redirect-objs := tc_l2_redirect_user.o
  96 lwt_len_hist-objs := lwt_len_hist_user.o
  97 xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
  98 test_map_in_map-objs := test_map_in_map_user.o
  99 per_socket_stats_example-objs := cookie_uid_helper_example.o
 100 xdp_redirect-objs := xdp_redirect_user.o
 101 xdp_redirect_map-objs := xdp_redirect_map_user.o
 102 xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o
 103 xdp_monitor-objs := xdp_monitor_user.o
 104 xdp_rxq_info-objs := xdp_rxq_info_user.o
 105 syscall_tp-objs := syscall_tp_user.o
 106 cpustat-objs := cpustat_user.o
 107 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
 108 xdpsock-objs := xdpsock_user.o
 109 xdpsock_ctrl_proc-objs := xdpsock_ctrl_proc.o
 110 xsk_fwd-objs := xsk_fwd.o
 111 xdp_fwd-objs := xdp_fwd_user.o
 112 task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
 113 xdp_sample_pkts-objs := xdp_sample_pkts_user.o
 114 ibumad-objs := ibumad_user.o
 115 hbm-objs := hbm.o $(CGROUP_HELPERS)
 116
 117 # Tell kbuild to always build the programs
 118 always-y := $(tprogs-y)
 119 always-y += sockex1_kern.o
 120 always-y += sockex2_kern.o
 121 always-y += sockex3_kern.o
 122 always-y += tracex1_kern.o
 123 always-y += tracex2_kern.o
 124 always-y += tracex3_kern.o
 125 always-y += tracex4_kern.o
 126 always-y += tracex5_kern.o
 127 always-y += tracex6_kern.o
 128 always-y += tracex7_kern.o
 129 always-y += sock_flags_kern.o
 130 always-y += test_probe_write_user_kern.o
 131 always-y += trace_output_kern.o
 132 always-y += tcbpf1_kern.o
 133 always-y += tc_l2_redirect_kern.o
 134 always-y += lathist_kern.o
 135 always-y += offwaketime_kern.o
 136 always-y += spintest_kern.o
 137 always-y += map_perf_test_kern.o
 138 always-y += test_overhead_tp_kern.o
 139 always-y += test_overhead_raw_tp_kern.o
 140 always-y += test_overhead_kprobe_kern.o
 141 always-y += parse_varlen.o parse_simple.o parse_ldabs.o
 142 always-y += test_cgrp2_tc_kern.o
 143 always-y += xdp1_kern.o
 144 always-y += xdp2_kern.o
 145 always-y += xdp_router_ipv4_kern.o
 146 always-y += test_current_task_under_cgroup_kern.o
 147 always-y += trace_event_kern.o
 148 always-y += sampleip_kern.o
 149 always-y += lwt_len_hist_kern.o
 150 always-y += xdp_tx_iptunnel_kern.o
 151 always-y += test_map_in_map_kern.o
 152 always-y += tcp_synrto_kern.o
 153 always-y += tcp_rwnd_kern.o
 154 always-y += tcp_bufs_kern.o
 155 always-y += tcp_cong_kern.o
 156 always-y += tcp_iw_kern.o
 157 always-y += tcp_clamp_kern.o
 158 always-y += tcp_basertt_kern.o
 159 always-y += tcp_tos_reflect_kern.o
 160 always-y += tcp_dumpstats_kern.o
 161 always-y += xdp_redirect_kern.o
 162 always-y += xdp_redirect_map_kern.o
 163 always-y += xdp_redirect_cpu_kern.o
 164 always-y += xdp_monitor_kern.o
 165 always-y += xdp_rxq_info_kern.o
 166 always-y += xdp2skb_meta_kern.o
 167 always-y += syscall_tp_kern.o
 168 always-y += cpustat_kern.o
 169 always-y += xdp_adjust_tail_kern.o
 170 always-y += xdp_fwd_kern.o
 171 always-y += task_fd_query_kern.o
 172 always-y += xdp_sample_pkts_kern.o
 173 always-y += ibumad_kern.o
 174 always-y += hbm_out_kern.o
 175 always-y += hbm_edt_kern.o
 176 always-y += xdpsock_kern.o
 177
 178 ifeq ($(ARCH), arm)
 179 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
 180 # headers when arm instruction set identification is requested.
 181 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
 182 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
 183 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
 184 endif
 185
 186 TPROGS_CFLAGS += -Wall -O2
 187 TPROGS_CFLAGS += -Wmissing-prototypes
 188 TPROGS_CFLAGS += -Wstrict-prototypes
 189
 190 TPROGS_CFLAGS += -I$(objtree)/usr/include
 191 TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
 192 TPROGS_CFLAGS += -I$(srctree)/tools/lib/
 193 TPROGS_CFLAGS += -I$(srctree)/tools/include
 194 TPROGS_CFLAGS += -I$(srctree)/tools/perf
 195 TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
 196
 197 ifdef SYSROOT
 198 TPROGS_CFLAGS += --sysroot=$(SYSROOT)
 199 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
 200 endif
 201
 202 TPROGS_LDLIBS                   += $(LIBBPF) -lelf -lz
 203 TPROGLDLIBS_tracex4             += -lrt
 204 TPROGLDLIBS_trace_output        += -lrt
 205 TPROGLDLIBS_map_perf_test       += -lrt
 206 TPROGLDLIBS_test_overhead       += -lrt
 207 TPROGLDLIBS_xdpsock             += -pthread -lcap
 208 TPROGLDLIBS_xsk_fwd             += -pthread
 209
 210 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
 211 #  make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
 212 LLC ?= llc
 213 CLANG ?= clang
 214 OPT ?= opt
 215 LLVM_DIS ?= llvm-dis
 216 LLVM_OBJCOPY ?= llvm-objcopy
 217 BTF_PAHOLE ?= pahole
 218
 219 # Detect that we're cross compiling and use the cross compiler
 220 ifdef CROSS_COMPILE
 221 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
 222 endif
 223
 224 # Don't evaluate probes and warnings if we need to run make recursively
 225 ifneq ($(src),)
 226 HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
 227         $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
 228         -o /dev/null 2>/dev/null && echo okay)
 229
 230 ifeq ($(HDR_PROBE),)
 231 $(warning WARNING: Detected possible issues with include path.)
 232 $(warning WARNING: Please install kernel headers locally (make headers_install).)
 233 endif
 234
 235 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
 236 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
 237 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
 238 BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
 239                           $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
 240                           readelf -S ./llvm_btf_verify.o | grep BTF; \
 241                           /bin/rm -f ./llvm_btf_verify.o)
 242
 243 BPF_EXTRA_CFLAGS += -fno-stack-protector
 244 ifneq ($(BTF_LLVM_PROBE),)
 245         BPF_EXTRA_CFLAGS += -g
 246 else
 247 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
 248         BPF_EXTRA_CFLAGS += -g
 249         LLC_FLAGS += -mattr=dwarfris
 250         DWARF2BTF = y
 251 endif
 252 endif
 253 endif
 254
 255 # Trick to allow make to be run from this directory
 256 all:
 257         $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
 258
 259 clean:
 260         $(MAKE) -C ../../ M=$(CURDIR) clean
 261         @find $(CURDIR) -type f -name '*~' -delete
 262
 263 $(LIBBPF): FORCE
 264 # Fix up variables inherited from Kbuild that tools/ build system won't like
 265         $(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
 266                 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O=
 267
 268 $(obj)/syscall_nrs.h:   $(obj)/syscall_nrs.s FORCE
 269         $(call filechk,offsets,__SYSCALL_NRS_H__)
 270
 271 targets += syscall_nrs.s
 272 clean-files += syscall_nrs.h
 273
 274 FORCE:
 275
 276
 277 # Verify LLVM compiler tools are available and bpf target is supported by llc
 278 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
 279
 280 verify_cmds: $(CLANG) $(LLC)
 281         @for TOOL in $^ ; do \
 282                 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
 283                         echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
 284                         exit 1; \
 285                 else true; fi; \
 286         done
 287
 288 verify_target_bpf: verify_cmds
 289         @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
 290                 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
 291                 echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
 292                 exit 2; \
 293         else true; fi
 294
 295 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
 296 $(src)/*.c: verify_target_bpf $(LIBBPF)
 297
 298 $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
 299 $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
 300 $(obj)/hbm.o: $(src)/hbm.h
 301 $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
 302
 303 -include $(BPF_SAMPLES_PATH)/Makefile.target
 304
 305 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
 306 # But, there is no easy way to fix it, so just exclude it since it is
 307 # useless for BPF samples.
 308 # below we use long chain of commands, clang | opt | llvm-dis | llc,
 309 # to generate final object file. 'clang' compiles the source into IR
 310 # with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
 311 # processing (llvm12) and IR optimizations. 'llvm-dis' converts
 312 # 'opt' output to IR, and finally 'llc' generates bpf byte code.
 313 $(obj)/%.o: $(src)/%.c
 314         @echo "  CLANG-bpf " $@
 315         $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
 316                 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
 317                 -I$(srctree)/tools/lib/ \
 318                 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
 319                 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
 320                 -Wno-gnu-variable-sized-type-not-at-end \
 321                 -Wno-address-of-packed-member -Wno-tautological-compare \
 322                 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
 323                 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
 324                 -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
 325                 $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
 326                 $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
 327 ifeq ($(DWARF2BTF),y)
 328         $(BTF_PAHOLE) -J $@
 329 endif