0ed3cc4abc
Quentin reports that commit 07c3bbdb1a ("samples: bpf: print
a warning about headers_install") is producing the false
positive when make is invoked locally, from the samples/bpf/
directory.
When make is run locally it hits the "all" target, which
will recursively invoke make through the full build system.
Speed up the "local" run which doesn't actually build anything,
and avoid false positives by skipping all the probes if not in
kbuild environment (cover both the new warning and the BTF
probes).
Reported-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
302 lines
10 KiB
Makefile
302 lines
10 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
|
|
TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
|
|
|
|
# List of programs to build
|
|
hostprogs-y := test_lru_dist
|
|
hostprogs-y += sock_example
|
|
hostprogs-y += fds_example
|
|
hostprogs-y += sockex1
|
|
hostprogs-y += sockex2
|
|
hostprogs-y += sockex3
|
|
hostprogs-y += tracex1
|
|
hostprogs-y += tracex2
|
|
hostprogs-y += tracex3
|
|
hostprogs-y += tracex4
|
|
hostprogs-y += tracex5
|
|
hostprogs-y += tracex6
|
|
hostprogs-y += tracex7
|
|
hostprogs-y += test_probe_write_user
|
|
hostprogs-y += trace_output
|
|
hostprogs-y += lathist
|
|
hostprogs-y += offwaketime
|
|
hostprogs-y += spintest
|
|
hostprogs-y += map_perf_test
|
|
hostprogs-y += test_overhead
|
|
hostprogs-y += test_cgrp2_array_pin
|
|
hostprogs-y += test_cgrp2_attach
|
|
hostprogs-y += test_cgrp2_sock
|
|
hostprogs-y += test_cgrp2_sock2
|
|
hostprogs-y += xdp1
|
|
hostprogs-y += xdp2
|
|
hostprogs-y += xdp_router_ipv4
|
|
hostprogs-y += test_current_task_under_cgroup
|
|
hostprogs-y += trace_event
|
|
hostprogs-y += sampleip
|
|
hostprogs-y += tc_l2_redirect
|
|
hostprogs-y += lwt_len_hist
|
|
hostprogs-y += xdp_tx_iptunnel
|
|
hostprogs-y += test_map_in_map
|
|
hostprogs-y += per_socket_stats_example
|
|
hostprogs-y += xdp_redirect
|
|
hostprogs-y += xdp_redirect_map
|
|
hostprogs-y += xdp_redirect_cpu
|
|
hostprogs-y += xdp_monitor
|
|
hostprogs-y += xdp_rxq_info
|
|
hostprogs-y += syscall_tp
|
|
hostprogs-y += cpustat
|
|
hostprogs-y += xdp_adjust_tail
|
|
hostprogs-y += xdpsock
|
|
hostprogs-y += xdp_fwd
|
|
hostprogs-y += task_fd_query
|
|
hostprogs-y += xdp_sample_pkts
|
|
hostprogs-y += ibumad
|
|
hostprogs-y += hbm
|
|
|
|
# Libbpf dependencies
|
|
LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
|
|
|
|
CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
|
|
TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
|
|
|
|
fds_example-objs := fds_example.o
|
|
sockex1-objs := sockex1_user.o
|
|
sockex2-objs := sockex2_user.o
|
|
sockex3-objs := bpf_load.o sockex3_user.o
|
|
tracex1-objs := bpf_load.o tracex1_user.o
|
|
tracex2-objs := bpf_load.o tracex2_user.o
|
|
tracex3-objs := bpf_load.o tracex3_user.o
|
|
tracex4-objs := bpf_load.o tracex4_user.o
|
|
tracex5-objs := bpf_load.o tracex5_user.o
|
|
tracex6-objs := bpf_load.o tracex6_user.o
|
|
tracex7-objs := bpf_load.o tracex7_user.o
|
|
test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
|
|
trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
|
|
lathist-objs := bpf_load.o lathist_user.o
|
|
offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
|
|
spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
|
|
map_perf_test-objs := bpf_load.o map_perf_test_user.o
|
|
test_overhead-objs := bpf_load.o test_overhead_user.o
|
|
test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
|
|
test_cgrp2_attach-objs := test_cgrp2_attach.o
|
|
test_cgrp2_sock-objs := test_cgrp2_sock.o
|
|
test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
|
|
xdp1-objs := xdp1_user.o
|
|
# reuse xdp1 source intentionally
|
|
xdp2-objs := xdp1_user.o
|
|
xdp_router_ipv4-objs := xdp_router_ipv4_user.o
|
|
test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
|
|
test_current_task_under_cgroup_user.o
|
|
trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)
|
|
sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)
|
|
tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
|
|
lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
|
|
xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
|
|
test_map_in_map-objs := bpf_load.o test_map_in_map_user.o
|
|
per_socket_stats_example-objs := cookie_uid_helper_example.o
|
|
xdp_redirect-objs := xdp_redirect_user.o
|
|
xdp_redirect_map-objs := xdp_redirect_map_user.o
|
|
xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
|
|
xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
|
|
xdp_rxq_info-objs := xdp_rxq_info_user.o
|
|
syscall_tp-objs := bpf_load.o syscall_tp_user.o
|
|
cpustat-objs := bpf_load.o cpustat_user.o
|
|
xdp_adjust_tail-objs := xdp_adjust_tail_user.o
|
|
xdpsock-objs := xdpsock_user.o
|
|
xdp_fwd-objs := xdp_fwd_user.o
|
|
task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
|
|
xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
|
|
ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
|
|
hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
|
|
|
|
# Tell kbuild to always build the programs
|
|
always := $(hostprogs-y)
|
|
always += sockex1_kern.o
|
|
always += sockex2_kern.o
|
|
always += sockex3_kern.o
|
|
always += tracex1_kern.o
|
|
always += tracex2_kern.o
|
|
always += tracex3_kern.o
|
|
always += tracex4_kern.o
|
|
always += tracex5_kern.o
|
|
always += tracex6_kern.o
|
|
always += tracex7_kern.o
|
|
always += sock_flags_kern.o
|
|
always += test_probe_write_user_kern.o
|
|
always += trace_output_kern.o
|
|
always += tcbpf1_kern.o
|
|
always += tc_l2_redirect_kern.o
|
|
always += lathist_kern.o
|
|
always += offwaketime_kern.o
|
|
always += spintest_kern.o
|
|
always += map_perf_test_kern.o
|
|
always += test_overhead_tp_kern.o
|
|
always += test_overhead_raw_tp_kern.o
|
|
always += test_overhead_kprobe_kern.o
|
|
always += parse_varlen.o parse_simple.o parse_ldabs.o
|
|
always += test_cgrp2_tc_kern.o
|
|
always += xdp1_kern.o
|
|
always += xdp2_kern.o
|
|
always += xdp_router_ipv4_kern.o
|
|
always += test_current_task_under_cgroup_kern.o
|
|
always += trace_event_kern.o
|
|
always += sampleip_kern.o
|
|
always += lwt_len_hist_kern.o
|
|
always += xdp_tx_iptunnel_kern.o
|
|
always += test_map_in_map_kern.o
|
|
always += cookie_uid_helper_example.o
|
|
always += tcp_synrto_kern.o
|
|
always += tcp_rwnd_kern.o
|
|
always += tcp_bufs_kern.o
|
|
always += tcp_cong_kern.o
|
|
always += tcp_iw_kern.o
|
|
always += tcp_clamp_kern.o
|
|
always += tcp_basertt_kern.o
|
|
always += tcp_tos_reflect_kern.o
|
|
always += xdp_redirect_kern.o
|
|
always += xdp_redirect_map_kern.o
|
|
always += xdp_redirect_cpu_kern.o
|
|
always += xdp_monitor_kern.o
|
|
always += xdp_rxq_info_kern.o
|
|
always += xdp2skb_meta_kern.o
|
|
always += syscall_tp_kern.o
|
|
always += cpustat_kern.o
|
|
always += xdp_adjust_tail_kern.o
|
|
always += xdp_fwd_kern.o
|
|
always += task_fd_query_kern.o
|
|
always += xdp_sample_pkts_kern.o
|
|
always += ibumad_kern.o
|
|
always += hbm_out_kern.o
|
|
|
|
KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
|
|
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/
|
|
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
|
|
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
|
|
KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
|
|
|
|
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
|
|
HOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/
|
|
|
|
HOSTCFLAGS_trace_output_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_offwaketime_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_spintest_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/
|
|
HOSTCFLAGS_xdp_sample_pkts_user.o += -I$(srctree)/tools/lib/bpf/
|
|
|
|
KBUILD_HOSTLDLIBS += $(LIBBPF) -lelf
|
|
HOSTLDLIBS_tracex4 += -lrt
|
|
HOSTLDLIBS_trace_output += -lrt
|
|
HOSTLDLIBS_map_perf_test += -lrt
|
|
HOSTLDLIBS_test_overhead += -lrt
|
|
HOSTLDLIBS_xdpsock += -pthread
|
|
|
|
# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
|
|
# make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
|
|
LLC ?= llc
|
|
CLANG ?= clang
|
|
LLVM_OBJCOPY ?= llvm-objcopy
|
|
BTF_PAHOLE ?= pahole
|
|
|
|
# Detect that we're cross compiling and use the cross compiler
|
|
ifdef CROSS_COMPILE
|
|
HOSTCC = $(CROSS_COMPILE)gcc
|
|
CLANG_ARCH_ARGS = -target $(ARCH)
|
|
endif
|
|
|
|
# Don't evaluate probes and warnings if we need to run make recursively
|
|
ifneq ($(src),)
|
|
HDR_PROBE := $(shell echo "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
|
|
$(HOSTCC) $(KBUILD_HOSTCFLAGS) -x c - -o /dev/null 2>/dev/null && \
|
|
echo okay)
|
|
|
|
ifeq ($(HDR_PROBE),)
|
|
$(warning WARNING: Detected possible issues with include path.)
|
|
$(warning WARNING: Please install kernel headers locally (make headers_install).)
|
|
endif
|
|
|
|
BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
|
|
BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
|
|
BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
|
|
BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
|
|
$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
|
|
readelf -S ./llvm_btf_verify.o | grep BTF; \
|
|
/bin/rm -f ./llvm_btf_verify.o)
|
|
|
|
ifneq ($(BTF_LLVM_PROBE),)
|
|
EXTRA_CFLAGS += -g
|
|
else
|
|
ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
|
|
EXTRA_CFLAGS += -g
|
|
LLC_FLAGS += -mattr=dwarfris
|
|
DWARF2BTF = y
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
# Trick to allow make to be run from this directory
|
|
all:
|
|
$(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR)
|
|
|
|
clean:
|
|
$(MAKE) -C ../../ M=$(CURDIR) clean
|
|
@rm -f *~
|
|
|
|
$(LIBBPF): FORCE
|
|
# Fix up variables inherited from Kbuild that tools/ build system won't like
|
|
$(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O=
|
|
|
|
$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
|
|
$(call filechk,offsets,__SYSCALL_NRS_H__)
|
|
|
|
targets += syscall_nrs.s
|
|
clean-files += syscall_nrs.h
|
|
|
|
FORCE:
|
|
|
|
|
|
# Verify LLVM compiler tools are available and bpf target is supported by llc
|
|
.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
|
|
|
|
verify_cmds: $(CLANG) $(LLC)
|
|
@for TOOL in $^ ; do \
|
|
if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
|
|
echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
|
|
exit 1; \
|
|
else true; fi; \
|
|
done
|
|
|
|
verify_target_bpf: verify_cmds
|
|
@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
|
|
echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
|
|
echo " NOTICE: LLVM version >= 3.7.1 required" ;\
|
|
exit 2; \
|
|
else true; fi
|
|
|
|
$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
|
|
$(src)/*.c: verify_target_bpf $(LIBBPF)
|
|
|
|
$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
|
|
$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
|
|
$(obj)/hbm.o: $(src)/hbm.h
|
|
|
|
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
|
|
# But, there is no easy way to fix it, so just exclude it since it is
|
|
# useless for BPF samples.
|
|
$(obj)/%.o: $(src)/%.c
|
|
@echo " CLANG-bpf " $@
|
|
$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
|
|
-I$(srctree)/tools/testing/selftests/bpf/ \
|
|
-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
|
|
-D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \
|
|
-Wno-gnu-variable-sized-type-not-at-end \
|
|
-Wno-address-of-packed-member -Wno-tautological-compare \
|
|
-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
|
|
-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
|
|
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
|
|
ifeq ($(DWARF2BTF),y)
|
|
$(BTF_PAHOLE) -J $@
|
|
endif
|