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 hostprogs-y := test_lru_dist
   8 hostprogs-y += sock_example
   9 hostprogs-y += fds_example
  10 hostprogs-y += sockex1
  11 hostprogs-y += sockex2
  12 hostprogs-y += sockex3
  13 hostprogs-y += tracex1
  14 hostprogs-y += tracex2
  15 hostprogs-y += tracex3
  16 hostprogs-y += tracex4
  17 hostprogs-y += tracex5
  18 hostprogs-y += tracex6
  19 hostprogs-y += tracex7
  20 hostprogs-y += test_probe_write_user
  21 hostprogs-y += trace_output
  22 hostprogs-y += lathist
  23 hostprogs-y += offwaketime
  24 hostprogs-y += spintest
  25 hostprogs-y += map_perf_test
  26 hostprogs-y += test_overhead
  27 hostprogs-y += test_cgrp2_array_pin
  28 hostprogs-y += test_cgrp2_attach
  29 hostprogs-y += test_cgrp2_attach2
  30 hostprogs-y += test_cgrp2_sock
  31 hostprogs-y += test_cgrp2_sock2
  32 hostprogs-y += xdp1
  33 hostprogs-y += xdp2
  34 hostprogs-y += xdp_router_ipv4
  35 hostprogs-y += test_current_task_under_cgroup
  36 hostprogs-y += trace_event
  37 hostprogs-y += sampleip
  38 hostprogs-y += tc_l2_redirect
  39 hostprogs-y += lwt_len_hist
  40 hostprogs-y += xdp_tx_iptunnel
  41 hostprogs-y += test_map_in_map
  42 hostprogs-y += per_socket_stats_example
  43 hostprogs-y += load_sock_ops
  44 hostprogs-y += xdp_redirect
  45 hostprogs-y += xdp_redirect_map
  46 hostprogs-y += xdp_redirect_cpu
  47 hostprogs-y += xdp_monitor
  48 hostprogs-y += xdp_rxq_info
  49 hostprogs-y += syscall_tp
  50 hostprogs-y += cpustat
  51 hostprogs-y += xdp_adjust_tail
  52 hostprogs-y += xdpsock
  53 hostprogs-y += xdp_fwd
  54 hostprogs-y += task_fd_query
  55 hostprogs-y += xdp_sample_pkts
  56
  57 # Libbpf dependencies
  58 LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
  59
  60 CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
  61 TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
  62
  63 fds_example-objs := bpf_load.o fds_example.o
  64 sockex1-objs := bpf_load.o sockex1_user.o
  65 sockex2-objs := bpf_load.o sockex2_user.o
  66 sockex3-objs := bpf_load.o sockex3_user.o
  67 tracex1-objs := bpf_load.o tracex1_user.o
  68 tracex2-objs := bpf_load.o tracex2_user.o
  69 tracex3-objs := bpf_load.o tracex3_user.o
  70 tracex4-objs := bpf_load.o tracex4_user.o
  71 tracex5-objs := bpf_load.o tracex5_user.o
  72 tracex6-objs := bpf_load.o tracex6_user.o
  73 tracex7-objs := bpf_load.o tracex7_user.o
  74 load_sock_ops-objs := bpf_load.o load_sock_ops.o
  75 test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
  76 trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
  77 lathist-objs := bpf_load.o lathist_user.o
  78 offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
  79 spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
  80 map_perf_test-objs := bpf_load.o map_perf_test_user.o
  81 test_overhead-objs := bpf_load.o test_overhead_user.o
  82 test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
  83 test_cgrp2_attach-objs := test_cgrp2_attach.o
  84 test_cgrp2_attach2-objs := test_cgrp2_attach2.o $(CGROUP_HELPERS)
  85 test_cgrp2_sock-objs := test_cgrp2_sock.o
  86 test_cgrp2_sock2-objs := bpf_load.o 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 := bpf_load.o xdp_router_ipv4_user.o
  91 test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
  92                                        test_current_task_under_cgroup_user.o
  93 trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)
  94 sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)
  95 tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
  96 lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
  97 xdp_tx_iptunnel-objs := bpf_load.o xdp_tx_iptunnel_user.o
  98 test_map_in_map-objs := bpf_load.o test_map_in_map_user.o
  99 per_socket_stats_example-objs := cookie_uid_helper_example.o
 100 xdp_redirect-objs := bpf_load.o xdp_redirect_user.o
 101 xdp_redirect_map-objs := bpf_load.o xdp_redirect_map_user.o
 102 xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
 103 xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
 104 xdp_rxq_info-objs := xdp_rxq_info_user.o
 105 syscall_tp-objs := bpf_load.o syscall_tp_user.o
 106 cpustat-objs := bpf_load.o cpustat_user.o
 107 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
 108 xdpsock-objs := xdpsock_user.o
 109 xdp_fwd-objs := xdp_fwd_user.o
 110 task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
 111 xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
 112
 113 # Tell kbuild to always build the programs
 114 always := $(hostprogs-y)
 115 always += sockex1_kern.o
 116 always += sockex2_kern.o
 117 always += sockex3_kern.o
 118 always += tracex1_kern.o
 119 always += tracex2_kern.o
 120 always += tracex3_kern.o
 121 always += tracex4_kern.o
 122 always += tracex5_kern.o
 123 always += tracex6_kern.o
 124 always += tracex7_kern.o
 125 always += sock_flags_kern.o
 126 always += test_probe_write_user_kern.o
 127 always += trace_output_kern.o
 128 always += tcbpf1_kern.o
 129 always += tc_l2_redirect_kern.o
 130 always += lathist_kern.o
 131 always += offwaketime_kern.o
 132 always += spintest_kern.o
 133 always += map_perf_test_kern.o
 134 always += test_overhead_tp_kern.o
 135 always += test_overhead_raw_tp_kern.o
 136 always += test_overhead_kprobe_kern.o
 137 always += parse_varlen.o parse_simple.o parse_ldabs.o
 138 always += test_cgrp2_tc_kern.o
 139 always += xdp1_kern.o
 140 always += xdp2_kern.o
 141 always += xdp_router_ipv4_kern.o
 142 always += test_current_task_under_cgroup_kern.o
 143 always += trace_event_kern.o
 144 always += sampleip_kern.o
 145 always += lwt_len_hist_kern.o
 146 always += xdp_tx_iptunnel_kern.o
 147 always += test_map_in_map_kern.o
 148 always += cookie_uid_helper_example.o
 149 always += tcp_synrto_kern.o
 150 always += tcp_rwnd_kern.o
 151 always += tcp_bufs_kern.o
 152 always += tcp_cong_kern.o
 153 always += tcp_iw_kern.o
 154 always += tcp_clamp_kern.o
 155 always += tcp_basertt_kern.o
 156 always += tcp_tos_reflect_kern.o
 157 always += xdp_redirect_kern.o
 158 always += xdp_redirect_map_kern.o
 159 always += xdp_redirect_cpu_kern.o
 160 always += xdp_monitor_kern.o
 161 always += xdp_rxq_info_kern.o
 162 always += xdp2skb_meta_kern.o
 163 always += syscall_tp_kern.o
 164 always += cpustat_kern.o
 165 always += xdp_adjust_tail_kern.o
 166 always += xdpsock_kern.o
 167 always += xdp_fwd_kern.o
 168 always += task_fd_query_kern.o
 169 always += xdp_sample_pkts_kern.o
 170
 171 KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
 172 KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/
 173 KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
 174 KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
 175 KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
 176
 177 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
 178 HOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/
 179
 180 HOSTCFLAGS_trace_output_user.o += -I$(srctree)/tools/lib/bpf/
 181 HOSTCFLAGS_offwaketime_user.o += -I$(srctree)/tools/lib/bpf/
 182 HOSTCFLAGS_spintest_user.o += -I$(srctree)/tools/lib/bpf/
 183 HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/
 184 HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/
 185 HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/
 186 HOSTCFLAGS_xdp_sample_pkts_user.o += -I$(srctree)/tools/lib/bpf/
 187
 188 KBUILD_HOSTLDLIBS               += $(LIBBPF) -lelf
 189 HOSTLDLIBS_tracex4              += -lrt
 190 HOSTLDLIBS_trace_output += -lrt
 191 HOSTLDLIBS_map_perf_test        += -lrt
 192 HOSTLDLIBS_test_overhead        += -lrt
 193 HOSTLDLIBS_xdpsock              += -pthread
 194
 195 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
 196 #  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
 197 LLC ?= llc
 198 CLANG ?= clang
 199 LLVM_OBJCOPY ?= llvm-objcopy
 200 BTF_PAHOLE ?= pahole
 201
 202 # Detect that we're cross compiling and use the cross compiler
 203 ifdef CROSS_COMPILE
 204 HOSTCC = $(CROSS_COMPILE)gcc
 205 CLANG_ARCH_ARGS = -target $(ARCH)
 206 endif
 207
 208 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
 209 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
 210 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
 211 BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
 212                           $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
 213                           readelf -S ./llvm_btf_verify.o | grep BTF; \
 214                           /bin/rm -f ./llvm_btf_verify.o)
 215
 216 ifneq ($(BTF_LLVM_PROBE),)
 217         EXTRA_CFLAGS += -g
 218 else
 219 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
 220         EXTRA_CFLAGS += -g
 221         LLC_FLAGS += -mattr=dwarfris
 222         DWARF2BTF = y
 223 endif
 224 endif
 225
 226 # Trick to allow make to be run from this directory
 227 all:
 228         $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR)
 229
 230 clean:
 231         $(MAKE) -C ../../ M=$(CURDIR) clean
 232         @rm -f *~
 233
 234 $(LIBBPF): FORCE
 235 # Fix up variables inherited from Kbuild that tools/ build system won't like
 236         $(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O=
 237
 238 $(obj)/syscall_nrs.s:   $(src)/syscall_nrs.c
 239         $(call if_changed_dep,cc_s_c)
 240
 241 $(obj)/syscall_nrs.h:   $(obj)/syscall_nrs.s FORCE
 242         $(call filechk,offsets,__SYSCALL_NRS_H__)
 243
 244 clean-files += syscall_nrs.h
 245
 246 FORCE:
 247
 248
 249 # Verify LLVM compiler tools are available and bpf target is supported by llc
 250 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
 251
 252 verify_cmds: $(CLANG) $(LLC)
 253         @for TOOL in $^ ; do \
 254                 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
 255                         echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
 256                         exit 1; \
 257                 else true; fi; \
 258         done
 259
 260 verify_target_bpf: verify_cmds
 261         @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
 262                 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
 263                 echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
 264                 exit 2; \
 265         else true; fi
 266
 267 $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
 268 $(src)/*.c: verify_target_bpf $(LIBBPF)
 269
 270 $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
 271
 272 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
 273 # But, there is no easy way to fix it, so just exclude it since it is
 274 # useless for BPF samples.
 275 $(obj)/%.o: $(src)/%.c
 276         @echo "  CLANG-bpf " $@
 277         $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
 278                 -I$(srctree)/tools/testing/selftests/bpf/ \
 279                 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
 280                 -D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \
 281                 -Wno-gnu-variable-sized-type-not-at-end \
 282                 -Wno-address-of-packed-member -Wno-tautological-compare \
 283                 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
 284                 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
 285 ifeq ($(DWARF2BTF),y)
 286         $(BTF_PAHOLE) -J $@
 287 endif