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Date: Tue, 22 Aug 2023 22:07:10 +0000
From: Hardik Garg <hargar@...ux.microsoft.com>
To: stable@...r.kernel.org
Cc: Shuah Khan <shuah@...nel.org>,
Hangbin Liu <liuhangbin@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
netdev@...r.kernel.org,
bjorn@...nel.org
Subject: [PATCH 6.1] selftests/net: mv bpf/nat6to4.c to net folder
From: Hangbin Liu <liuhangbin@...il.com>
commit 3c107f36db06 ("selftests/net: mv bpf/nat6to4.c to net folder")
backport this v6.4 commit to v6.1 to fix this error:
error: unable to open output file 'linux/kselftest/net/bpf/nat6to4.o':
'No such file or directory'
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>
Link: https://lore.kernel.org/r/20230118020927.3971864-1-liuhangbin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Hardik Garg <hargar@...ux.microsoft.com>
---
tools/testing/selftests/net/Makefile | 50 ++++++++++++++++++-
tools/testing/selftests/net/bpf/Makefile | 14 ------
.../testing/selftests/net/{bpf => }/nat6to4.c | 0
tools/testing/selftests/net/udpgro_frglist.sh | 8 +--
4 files changed, 52 insertions(+), 20 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 69c58362c0ed..48d1a68be1d5 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -71,14 +71,60 @@ TEST_GEN_FILES += bind_bhash
TEST_GEN_PROGS += sk_bind_sendto_listen
TEST_GEN_PROGS += sk_connect_zero_addr
TEST_PROGS += test_ingress_egress_chaining.sh
+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 8ccaf8732eb2..000000000000
--- a/tools/testing/selftests/net/bpf/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-CLANG ?= clang
-CCINCLUDE += -I../../bpf
-CCINCLUDE += -I../../../../lib
-CCINCLUDE += -I../../../../../usr/include/
-
-TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
-all: $(TEST_CUSTOM_PROGS)
-
-$(OUTPUT)/%.o: %.c
- $(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) -o $@
-
-EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)
diff --git a/tools/testing/selftests/net/bpf/nat6to4.c b/tools/testing/selftests/net/nat6to4.c
similarity index 100%
rename from tools/testing/selftests/net/bpf/nat6to4.c
rename to tools/testing/selftests/net/nat6to4.c
diff --git a/tools/testing/selftests/net/udpgro_frglist.sh b/tools/testing/selftests/net/udpgro_frglist.sh
index c9c4b9d65839..0a6359bed0b9 100755
--- a/tools/testing/selftests/net/udpgro_frglist.sh
+++ b/tools/testing/selftests/net/udpgro_frglist.sh
@@ -40,8 +40,8 @@ run_one() {
ip -n "${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
--
2.33.8
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