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Date: Mon, 16 Jan 2023 16:55:41 +0800
From: Hangbin Liu <liuhangbin@...il.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
David Ahern <dsahern@...nel.org>,
Lina Wang <lina.wang@...iatek.com>,
Coleman Dietsch <dietschc@....edu>, bpf@...r.kernel.org,
Maciej enczykowski <maze@...gle.com>,
Björn Töpel <bjorn@...osinc.com>,
Björn Töpel <bjorn@...nel.org>
Subject: Re: [PATCHv3 net-next] selftests/net: mv bpf/nat6to4.c to net folder
Hello,
May I ask what's the status of this patch? I saw it's deferred[1] but I don't
know what I should do.
[1] https://patchwork.kernel.org/project/netdevbpf/patch/20221218082448.1829811-1-liuhangbin@gmail.com/
Thanks
Hangbin
On Sun, Dec 18, 2022 at 04:24:48PM +0800, Hangbin Liu wrote:
> There are some issues with the bpf/nat6to4.c building.
>
> 1. It use TEST_CUSTOM_PROGS, which will add the nat6to4.o to
> kselftest-list file and run by common run_tests.
> 2. When building the test via `make -C tools/testing/selftests/
> TARGETS="net"`, the nat6to4.o will be build in selftests/net/bpf/
> folder. But in test udpgro_frglist.sh it refers to ../bpf/nat6to4.o.
> The correct path should be ./bpf/nat6to4.o.
> 3. If building the test via `make -C tools/testing/selftests/ TARGETS="net"
> install`. The nat6to4.o will be installed to kselftest_install/net/
> folder. Then the udpgro_frglist.sh should refer to ./nat6to4.o.
>
> To fix the confusing test path, let's just move the nat6to4.c to net folder
> and build it as TEST_GEN_FILES.
>
> Fixes: edae34a3ed92 ("selftests net: add UDP GRO fraglist + bpf self-tests")
> Tested-by: Björn Töpel <bjorn@...nel.org>
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
> ---
> v3: remove unneeded $(OUTPUT)/bpf dir.
>
> v2: Update the Makefile rules rely on commit 837a3d66d698 ("selftests:
> net: Add cross-compilation support for BPF programs").
> ---
> tools/testing/selftests/net/Makefile | 50 +++++++++++++++++-
> tools/testing/selftests/net/bpf/Makefile | 51 -------------------
> .../testing/selftests/net/{bpf => }/nat6to4.c | 0
> tools/testing/selftests/net/udpgro_frglist.sh | 8 +--
> 4 files changed, 52 insertions(+), 57 deletions(-)
> delete mode 100644 tools/testing/selftests/net/bpf/Makefile
> rename tools/testing/selftests/net/{bpf => }/nat6to4.c (100%)
>
> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> index 3007e98a6d64..47314f0b3006 100644
> --- a/tools/testing/selftests/net/Makefile
> +++ b/tools/testing/selftests/net/Makefile
> @@ -75,14 +75,60 @@ TEST_GEN_PROGS += so_incoming_cpu
> TEST_PROGS += sctp_vrf.sh
> TEST_GEN_FILES += sctp_hello
> TEST_GEN_FILES += csum
> +TEST_GEN_FILES += nat6to4.o
>
> TEST_FILES := settings
>
> include ../lib.mk
>
> -include bpf/Makefile
> -
> $(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma
> $(OUTPUT)/tcp_mmap: LDLIBS += -lpthread
> $(OUTPUT)/tcp_inq: LDLIBS += -lpthread
> $(OUTPUT)/bind_bhash: LDLIBS += -lpthread
> +
> +# Rules to generate bpf obj nat6to4.o
> +CLANG ?= clang
> +SCRATCH_DIR := $(OUTPUT)/tools
> +BUILD_DIR := $(SCRATCH_DIR)/build
> +BPFDIR := $(abspath ../../../lib/bpf)
> +APIDIR := $(abspath ../../../include/uapi)
> +
> +CCINCLUDE += -I../bpf
> +CCINCLUDE += -I../../../../usr/include/
> +CCINCLUDE += -I$(SCRATCH_DIR)/include
> +
> +BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
> +
> +MAKE_DIRS := $(BUILD_DIR)/libbpf
> +$(MAKE_DIRS):
> + mkdir -p $@
> +
> +# Get Clang's default includes on this system, as opposed to those seen by
> +# '-target bpf'. This fixes "missing" files on some architectures/distros,
> +# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
> +#
> +# Use '-idirafter': Don't interfere with include mechanics except where the
> +# build would have failed anyways.
> +define get_sys_includes
> +$(shell $(1) $(2) -v -E - </dev/null 2>&1 \
> + | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
> +$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
> +endef
> +
> +ifneq ($(CROSS_COMPILE),)
> +CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
> +endif
> +
> +CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
> +
> +$(OUTPUT)/nat6to4.o: nat6to4.c $(BPFOBJ) | $(MAKE_DIRS)
> + $(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@
> +
> +$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
> + $(APIDIR)/linux/bpf.h \
> + | $(BUILD_DIR)/libbpf
> + $(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
> + EXTRA_CFLAGS='-g -O0' \
> + DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
> +
> +EXTRA_CLEAN := $(SCRATCH_DIR)
> diff --git a/tools/testing/selftests/net/bpf/Makefile b/tools/testing/selftests/net/bpf/Makefile
> deleted file mode 100644
> index 4abaf16d2077..000000000000
> --- a/tools/testing/selftests/net/bpf/Makefile
> +++ /dev/null
> @@ -1,51 +0,0 @@
> -# SPDX-License-Identifier: GPL-2.0
> -
> -CLANG ?= clang
> -SCRATCH_DIR := $(OUTPUT)/tools
> -BUILD_DIR := $(SCRATCH_DIR)/build
> -BPFDIR := $(abspath ../../../lib/bpf)
> -APIDIR := $(abspath ../../../include/uapi)
> -
> -CCINCLUDE += -I../../bpf
> -CCINCLUDE += -I../../../../../usr/include/
> -CCINCLUDE += -I$(SCRATCH_DIR)/include
> -
> -BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
> -
> -MAKE_DIRS := $(BUILD_DIR)/libbpf $(OUTPUT)/bpf
> -$(MAKE_DIRS):
> - mkdir -p $@
> -
> -TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
> -all: $(TEST_CUSTOM_PROGS)
> -
> -# Get Clang's default includes on this system, as opposed to those seen by
> -# '-target bpf'. This fixes "missing" files on some architectures/distros,
> -# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
> -#
> -# Use '-idirafter': Don't interfere with include mechanics except where the
> -# build would have failed anyways.
> -define get_sys_includes
> -$(shell $(1) $(2) -v -E - </dev/null 2>&1 \
> - | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
> -$(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
> -endef
> -
> -ifneq ($(CROSS_COMPILE),)
> -CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
> -endif
> -
> -CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
> -
> -$(TEST_CUSTOM_PROGS): $(OUTPUT)/%.o: %.c $(BPFOBJ) | $(MAKE_DIRS)
> - $(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@
> -
> -$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
> - $(APIDIR)/linux/bpf.h \
> - | $(BUILD_DIR)/libbpf
> - $(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
> - EXTRA_CFLAGS='-g -O0' \
> - DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
> -
> -EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR)
> -
> diff --git a/tools/testing/selftests/net/bpf/nat6to4.c b/tools/testing/selftests/net/nat6to4.c
> similarity index 100%
> rename from tools/testing/selftests/net/bpf/nat6to4.c
> rename to tools/testing/selftests/net/nat6to4.c
> diff --git a/tools/testing/selftests/net/udpgro_frglist.sh b/tools/testing/selftests/net/udpgro_frglist.sh
> index c9c4b9d65839..0a6359bed0b9 100755
> --- a/tools/testing/selftests/net/udpgro_frglist.sh
> +++ b/tools/testing/selftests/net/udpgro_frglist.sh
> @@ -40,8 +40,8 @@ run_one() {
>
> ip -n "${PEER_NS}" link set veth1 xdp object ${BPF_FILE} section xdp
> tc -n "${PEER_NS}" qdisc add dev veth1 clsact
> - tc -n "${PEER_NS}" filter add dev veth1 ingress prio 4 protocol ipv6 bpf object-file ../bpf/nat6to4.o section schedcls/ingress6/nat_6 direct-action
> - tc -n "${PEER_NS}" filter add dev veth1 egress prio 4 protocol ip bpf object-file ../bpf/nat6to4.o section schedcls/egress4/snat4 direct-action
> + tc -n "${PEER_NS}" filter add dev veth1 ingress prio 4 protocol ipv6 bpf object-file nat6to4.o section schedcls/ingress6/nat_6 direct-action
> + tc -n "${PEER_NS}" filter add dev veth1 egress prio 4 protocol ip bpf object-file nat6to4.o section schedcls/egress4/snat4 direct-action
> echo ${rx_args}
> ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
>
> @@ -88,8 +88,8 @@ if [ ! -f ${BPF_FILE} ]; then
> exit -1
> fi
>
> -if [ ! -f bpf/nat6to4.o ]; then
> - echo "Missing nat6to4 helper. Build bpfnat6to4.o selftest first"
> +if [ ! -f nat6to4.o ]; then
> + echo "Missing nat6to4 helper. Build bpf nat6to4.o selftest first"
> exit -1
> fi
>
> --
> 2.38.1
>
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