mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-10 02:29:01 +00:00
a3f7461734
test_cgrp2_array_pin.c: A userland program that creates a bpf_map (BPF_MAP_TYPE_GROUP_ARRAY), pouplates/updates it with a cgroup2's backed fd and pins it to a bpf-fs's file. The pinned file can be loaded by tc and then used by the bpf prog later. This program can also update an existing pinned array and it could be useful for debugging/testing purpose. test_cgrp2_tc_kern.c: A bpf prog which should be loaded by tc. It is to demonstrate the usage of bpf_skb_in_cgroup. test_cgrp2_tc.sh: A script that glues the test_cgrp2_array_pin.c and test_cgrp2_tc_kern.c together. The idea is like: 1. Load the test_cgrp2_tc_kern.o by tc 2. Use test_cgrp2_array_pin.c to populate a BPF_MAP_TYPE_CGROUP_ARRAY with a cgroup fd 3. Do a 'ping -6 ff02::1%ve' to ensure the packet has been dropped because of a match on the cgroup Most of the lines in test_cgrp2_tc.sh is the boilerplate to setup the cgroup/bpf-fs/net-devices/netns...etc. It is not bulletproof on errors but should work well enough and give enough debug info if things did not go well. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Tejun Heo <tj@kernel.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
128 lines
4.2 KiB
Makefile
128 lines
4.2 KiB
Makefile
# kbuild trick to avoid linker error. Can be omitted if a module is built.
|
|
obj- := dummy.o
|
|
|
|
# List of programs to build
|
|
hostprogs-y := test_verifier test_maps
|
|
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 += 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
|
|
|
|
test_verifier-objs := test_verifier.o libbpf.o
|
|
test_maps-objs := test_maps.o libbpf.o
|
|
sock_example-objs := sock_example.o libbpf.o
|
|
fds_example-objs := bpf_load.o libbpf.o fds_example.o
|
|
sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
|
|
sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
|
|
sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
|
|
tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
|
|
tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
|
|
tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
|
|
tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
|
|
tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
|
|
tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
|
|
trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
|
|
lathist-objs := bpf_load.o libbpf.o lathist_user.o
|
|
offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
|
|
spintest-objs := bpf_load.o libbpf.o spintest_user.o
|
|
map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
|
|
test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
|
|
test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
|
|
|
|
# Tell kbuild to always build the programs
|
|
always := $(hostprogs-y)
|
|
always += sockex1_kern.o
|
|
always += sockex2_kern.o
|
|
always += sockex3_kern.o
|
|
always += tracex1_kern.o
|
|
always += tracex2_kern.o
|
|
always += tracex3_kern.o
|
|
always += tracex4_kern.o
|
|
always += tracex5_kern.o
|
|
always += tracex6_kern.o
|
|
always += trace_output_kern.o
|
|
always += tcbpf1_kern.o
|
|
always += lathist_kern.o
|
|
always += offwaketime_kern.o
|
|
always += spintest_kern.o
|
|
always += map_perf_test_kern.o
|
|
always += test_overhead_tp_kern.o
|
|
always += test_overhead_kprobe_kern.o
|
|
always += parse_varlen.o parse_simple.o parse_ldabs.o
|
|
always += test_cgrp2_tc_kern.o
|
|
|
|
HOSTCFLAGS += -I$(objtree)/usr/include
|
|
|
|
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
|
|
HOSTLOADLIBES_fds_example += -lelf
|
|
HOSTLOADLIBES_sockex1 += -lelf
|
|
HOSTLOADLIBES_sockex2 += -lelf
|
|
HOSTLOADLIBES_sockex3 += -lelf
|
|
HOSTLOADLIBES_tracex1 += -lelf
|
|
HOSTLOADLIBES_tracex2 += -lelf
|
|
HOSTLOADLIBES_tracex3 += -lelf
|
|
HOSTLOADLIBES_tracex4 += -lelf -lrt
|
|
HOSTLOADLIBES_tracex5 += -lelf
|
|
HOSTLOADLIBES_tracex6 += -lelf
|
|
HOSTLOADLIBES_trace_output += -lelf -lrt
|
|
HOSTLOADLIBES_lathist += -lelf
|
|
HOSTLOADLIBES_offwaketime += -lelf
|
|
HOSTLOADLIBES_spintest += -lelf
|
|
HOSTLOADLIBES_map_perf_test += -lelf -lrt
|
|
HOSTLOADLIBES_test_overhead += -lelf -lrt
|
|
|
|
# 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
|
|
|
|
# Trick to allow make to be run from this directory
|
|
all:
|
|
$(MAKE) -C ../../ $$PWD/
|
|
|
|
clean:
|
|
$(MAKE) -C ../../ M=$$PWD clean
|
|
@rm -f *~
|
|
|
|
# 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
|
|
|
|
$(src)/*.c: verify_target_bpf
|
|
|
|
# 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
|
|
$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
|
|
-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
|
|
-Wno-compare-distinct-pointer-types \
|
|
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
|