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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
5ecd8c2273
Add selftests for bpf_skb_ancestor_cgroup_id helper. test_skb_cgroup_id.sh prepares testing interface and adds tc qdisc and filter for it using BPF object compiled from test_skb_cgroup_id_kern.c program. BPF program in test_skb_cgroup_id_kern.c gets ancestor cgroup id using the new helper at different levels of cgroup hierarchy that skb belongs to, including root level and non-existing level, and saves it to the map where the key is the level of corresponding cgroup and the value is its id. To trigger BPF program, user space program test_skb_cgroup_id_user is run. It adds itself into testing cgroup and sends UDP datagram to link-local multicast address of testing interface. Then it reads cgroup ids saved in kernel for different levels from the BPF map and compares them with those in user space. They must be equal for every level of ancestry. Example of run: # ./test_skb_cgroup_id.sh Wait for testing link-local IP to become available ... OK Note: 8 bytes struct bpf_elf_map fixup performed due to size mismatch! [PASS] Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
136 lines
4.4 KiB
Makefile
136 lines
4.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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LIBDIR := ../../../lib
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BPFDIR := $(LIBDIR)/bpf
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APIDIR := ../../../include/uapi
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GENDIR := ../../../../include/generated
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GENHDR := $(GENDIR)/autoconf.h
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ifneq ($(wildcard $(GENHDR)),)
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GENFLAGS := -DHAVE_GENHDR
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endif
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CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
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LDLIBS += -lcap -lelf -lrt -lpthread
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TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
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all: $(TEST_CUSTOM_PROGS)
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$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
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$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
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# Order correspond to 'make run_tests' order
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TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
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test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
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test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \
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test_socket_cookie test_cgroup_storage test_select_reuseport
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TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
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test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o \
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sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \
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test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
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sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
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sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
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test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o \
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test_get_stack_rawtp.o test_sockmap_kern.o test_sockhash_kern.o \
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test_lwt_seg6local.o sendmsg4_prog.o sendmsg6_prog.o test_lirc_mode2_kern.o \
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get_cgroup_id_kern.o socket_cookie_prog.o test_select_reuseport_kern.o \
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test_skb_cgroup_id_kern.o
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# Order correspond to 'make run_tests' order
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TEST_PROGS := test_kmod.sh \
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test_libbpf.sh \
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test_xdp_redirect.sh \
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test_xdp_meta.sh \
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test_offload.py \
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test_sock_addr.sh \
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test_tunnel.sh \
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test_lwt_seg6local.sh \
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test_lirc_mode2.sh \
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test_skb_cgroup_id.sh
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# Compile but not part of 'make run_tests'
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TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user
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include ../lib.mk
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BPFOBJ := $(OUTPUT)/libbpf.a
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$(TEST_GEN_PROGS): $(BPFOBJ)
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$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a
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$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
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$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
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$(OUTPUT)/test_sock: cgroup_helpers.c
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$(OUTPUT)/test_sock_addr: cgroup_helpers.c
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$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
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$(OUTPUT)/test_sockmap: cgroup_helpers.c
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$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c
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$(OUTPUT)/test_progs: trace_helpers.c
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$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
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$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
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.PHONY: force
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# force a rebuild of BPFOBJ when its dependencies are updated
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force:
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$(BPFOBJ): force
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$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
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CLANG ?= clang
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LLC ?= llc
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LLVM_OBJCOPY ?= llvm-objcopy
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BTF_PAHOLE ?= pahole
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PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
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# Let newer LLVM versions transparently probe the kernel for availability
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# of full BPF instruction set.
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ifeq ($(PROBE),)
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CPU ?= probe
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else
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CPU ?= generic
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endif
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# Get Clang's default includes on this system, as opposed to those seen by
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# '-target bpf'. This fixes "missing" files on some architectures/distros,
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# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
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#
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# Use '-idirafter': Don't interfere with include mechanics except where the
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# build would have failed anyways.
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CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
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| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
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CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
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$(CLANG_SYS_INCLUDES) \
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-Wno-compare-distinct-pointer-types
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$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
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$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
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BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
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BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
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BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
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ifneq ($(BTF_LLC_PROBE),)
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ifneq ($(BTF_PAHOLE_PROBE),)
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ifneq ($(BTF_OBJCOPY_PROBE),)
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CLANG_FLAGS += -g
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LLC_FLAGS += -mattr=dwarfris
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DWARF2BTF = y
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endif
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endif
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endif
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$(OUTPUT)/%.o: %.c
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$(CLANG) $(CLANG_FLAGS) \
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-O2 -target bpf -emit-llvm -c $< -o - | \
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$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
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ifeq ($(DWARF2BTF),y)
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$(BTF_PAHOLE) -J $@
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endif
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EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)
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