[PATCH bpf-next v3 14/14] selftests/bpf: test_xsk: Integrate test_xsk.c to test_progs framework

Bastien Curutchet (eBPF Foundation)
2025-09-04T10:11:56Z

test_xsk.c isn't part of the test_progs framework.

Integrate the tests defined by test_xsk.c into the test_progs framework
through a new file : prog_tests/xsk.c. ZeroCopy mode isn't tested in it
as veth peers don't support it.

Move test_xsk{.c/.h} to prog_tests/.

Add the find_bit library to test_progs sources in the Makefile as it is
is used by test_xsk.c

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
---
tools/testing/selftests/bpf/Makefile | 13 +-
.../selftests/bpf/{ => prog_tests}/test_xsk.c | 0
.../selftests/bpf/{ => prog_tests}/test_xsk.h | 0
tools/testing/selftests/bpf/prog_tests/xsk.c | 146 +++++++++++++++++++++
tools/testing/selftests/bpf/xskxceiver.c | 2 +-
5 files changed, 158 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 4bb4f3ee822c1adce0fbd82725b40983695d38b9..1af7d4b9fe54b777131bce0cbb8ca328c885c23a 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -541,6 +541,8 @@ TRUNNER_TEST_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.test.o, \
$$(notdir $$(wildcard $(TRUNNER_TESTS_DIR)/*.c)))
TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \
$$(filter %.c,$(TRUNNER_EXTRA_SOURCES)))
+TRUNNER_LIB_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \
+ $$(filter %.c,$(TRUNNER_LIB_SOURCES)))
TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
@@ -672,6 +674,10 @@ $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o: \
$$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@)
$(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@

+$(TRUNNER_LIB_OBJS): $(TRUNNER_OUTPUT)/%.o:$(TOOLSDIR)/lib/%.c
+ $$(call msg,LIB-OBJ,$(TRUNNER_BINARY),$$@)
+ $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
+
# non-flavored in-srctree builds receive special treatment, in particular, we
# do not need to copy extra resources (see e.g. test_btf_dump_case())
$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
@@ -685,6 +691,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): | $(TRUNNER_BPF_OBJS)

$(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS) \
$(TRUNNER_EXTRA_OBJS) $$(BPFOBJ) \
+ $(TRUNNER_LIB_OBJS) \
$(RESOLVE_BTFIDS) \
$(TRUNNER_BPFTOOL) \
$(OUTPUT)/veristat \
@@ -718,6 +725,7 @@ TRUNNER_EXTRA_SOURCES := test_progs.c \
json_writer.c \
flow_dissector_load.h \
ip_check_defrag_frags.h
+TRUNNER_LIB_SOURCES := find_bit.c
TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read \
$(OUTPUT)/liburandom_read.so \
$(OUTPUT)/xdp_synproxy \
@@ -755,6 +763,7 @@ endif
TRUNNER_TESTS_DIR := map_tests
TRUNNER_BPF_PROGS_DIR := progs
TRUNNER_EXTRA_SOURCES := test_maps.c
+TRUNNER_LIB_SOURCES :=
TRUNNER_EXTRA_FILES :=
TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
TRUNNER_BPF_CFLAGS :=
@@ -776,8 +785,8 @@ $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@

# Include find_bit.c to compile xskxceiver.
-EXTRA_SRC := $(TOOLSDIR)/lib/find_bit.c
-$(OUTPUT)/xskxceiver: $(EXTRA_SRC) test_xsk.c test_xsk.h xskxceiver.c xskxceiver.h $(OUTPUT)/network_helpers.o $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
+EXTRA_SRC := $(TOOLSDIR)/lib/find_bit.c prog_tests/test_xsk.c prog_tests/test_xsk.h
+$(OUTPUT)/xskxceiver: $(EXTRA_SRC) xskxceiver.c xskxceiver.h $(OUTPUT)/network_helpers.o $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
$(call msg,BINARY,,$@)
$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@

diff --git a/tools/testing/selftests/bpf/test_xsk.c b/tools/testing/selftests/bpf/prog_tests/test_xsk.c
similarity index 100%
rename from tools/testing/selftests/bpf/test_xsk.c
rename to tools/testing/selftests/bpf/prog_tests/test_xsk.c
diff --git a/tools/testing/selftests/bpf/test_xsk.h b/tools/testing/selftests/bpf/prog_tests/test_xsk.h
similarity index 100%
rename from tools/testing/selftests/bpf/test_xsk.h
rename to tools/testing/selftests/bpf/prog_tests/test_xsk.h
diff --git a/tools/testing/selftests/bpf/prog_tests/xsk.c b/tools/testing/selftests/bpf/prog_tests/xsk.c
new file mode 100644
index 0000000000000000000000000000000000000000..7ce5ddd7d3fc848df27534f00a6a9f82fbc797c5
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/xsk.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <net/if.h>
+#include <stdarg.h>
+
+#include "network_helpers.h"
+#include "test_progs.h"
+#include "test_xsk.h"
+#include "xsk_xdp_progs.skel.h"
+
+#define VETH_RX "veth0"
+#define VETH_TX "veth1"
+#define MTU 1500
+
+int setup_veth(bool busy_poll)
+{
+ SYS(fail,
+ "ip link add %s numtxqueues 4 numrxqueues 4 type veth peer name %s numtxqueues 4 numrxqueues 4",
+ VETH_RX, VETH_TX);
+ SYS(fail, "sysctl -wq net.ipv6.conf.%s.disable_ipv6=1", VETH_RX);
+ SYS(fail, "sysctl -wq net.ipv6.conf.%s.disable_ipv6=1", VETH_TX);
+
+ if (busy_poll) {
+ SYS(fail, "echo 2 > /sys/class/net/%s/napi_defer_hard_irqs", VETH_RX);
+ SYS(fail, "echo 200000 > /sys/class/net/%s/gro_flush_timeout", VETH_RX);
+ SYS(fail, "echo 2 > /sys/class/net/%s/napi_defer_hard_irqs", VETH_TX);
+ SYS(fail, "echo 200000 > /sys/class/net/%s/gro_flush_timeout", VETH_TX);
+ }
+
+ SYS(fail, "ip link set %s mtu %d", VETH_RX, MTU);
+ SYS(fail, "ip link set %s mtu %d", VETH_TX, MTU);
+ SYS(fail, "ip link set %s up", VETH_RX);
+ SYS(fail, "ip link set %s up", VETH_TX);
+
+ return 0;
+
+fail:
+ return -1;
+}
+
+void delete_veth(void)
+{
+ SYS_NOFAIL("ip link del %s", VETH_RX);
+ SYS_NOFAIL("ip link del %s", VETH_TX);
+}
+
+int configure_ifobj(struct ifobject *tx, struct ifobject *rx)
+{
+ rx->ifindex = if_nametoindex(VETH_RX);
+ if (!ASSERT_OK_FD(rx->ifindex, "get RX ifindex"))
+ return -1;
+
+ tx->ifindex = if_nametoindex(VETH_TX);
+ if (!ASSERT_OK_FD(tx->ifindex, "get TX ifindex"))
+ return -1;
+
+ tx->shared_umem = false;
+ rx->shared_umem = false;
+
+
+ return 0;
+}
+
+static void test_xsk(const struct test_spec *test_to_run, enum test_mode mode)
+{
+ struct ifobject *ifobj_tx, *ifobj_rx;
+ struct test_spec test;
+ int ret;
+
+ ifobj_tx = ifobject_create();
+ if (!ASSERT_OK_PTR(ifobj_tx, "create ifobj_tx"))
+ return;
+
+ ifobj_rx = ifobject_create();
+ if (!ASSERT_OK_PTR(ifobj_rx, "create ifobj_rx"))
+ goto delete_tx;
+
+ if (!ASSERT_OK(setup_veth(false), "setup veth"))
+ goto delete_rx;
+
+ if (!ASSERT_OK(configure_ifobj(ifobj_tx, ifobj_rx), "conigure ifobj"))
+ goto delete_veth;
+
+ ret = get_hw_ring_size(ifobj_tx->ifname, &ifobj_tx->ring);
+ if (!ret) {
+ ifobj_tx->hw_ring_size_supp = true;
+ ifobj_tx->set_ring.default_tx = ifobj_tx->ring.tx_pending;
+ ifobj_tx->set_ring.default_rx = ifobj_tx->ring.rx_pending;
+ }
+
+ if (!ASSERT_OK(init_iface(ifobj_rx, worker_testapp_validate_rx), "init RX"))
+ goto delete_veth;
+ if (!ASSERT_OK(init_iface(ifobj_tx, worker_testapp_validate_tx), "init TX"))
+ goto delete_veth;
+
+ test_init(&test, ifobj_tx, ifobj_rx, 0, &tests[0]);
+
+ test.tx_pkt_stream_default = pkt_stream_generate(DEFAULT_PKT_CNT, MIN_PKT_SIZE);
+ if (!ASSERT_OK_PTR(test.tx_pkt_stream_default, "TX pkt generation"))
+ goto delete_veth;
+ test.rx_pkt_stream_default = pkt_stream_generate(DEFAULT_PKT_CNT, MIN_PKT_SIZE);
+ if (!ASSERT_OK_PTR(test.rx_pkt_stream_default, "RX pkt generation"))
+ goto delete_veth;
+
+
+ test_init(&test, ifobj_tx, ifobj_rx, mode, test_to_run);
+ ret = test.test_func(&test);
+ if (ret != TEST_SKIP)
+ ASSERT_OK(ret, "Run test");
+ pkt_stream_restore_default(&test);
+
+ if (ifobj_tx->hw_ring_size_supp)
+ hw_ring_size_reset(ifobj_tx);
+
+ pkt_stream_delete(test.tx_pkt_stream_default);
+ pkt_stream_delete(test.rx_pkt_stream_default);
+ xsk_xdp_progs__destroy(ifobj_tx->xdp_progs);
+ xsk_xdp_progs__destroy(ifobj_rx->xdp_progs);
+
+delete_veth:
+ delete_veth();
+delete_rx:
+ ifobject_delete(ifobj_rx);
+delete_tx:
+ ifobject_delete(ifobj_tx);
+}
+
+void test_ns_xsk_skb(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tests); i++) {
+ if (test__start_subtest(tests[i].name))
+ test_xsk(&tests[i], TEST_MODE_SKB);
+ }
+}
+
+void test_ns_xsk_drv(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tests); i++) {
+ if (test__start_subtest(tests[i].name))
+ test_xsk(&tests[i], TEST_MODE_DRV);
+ }
+}
+
diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 0d8e240864c747253d72319efeecd46f0fdeff03..4c8b931d9e3d5b5723df87922551d1b5b97293b1 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -90,7 +90,7 @@
#include <sys/mman.h>
#include <sys/types.h>

-#include "test_xsk.h"
+#include "prog_tests/test_xsk.h"
#include "xsk_xdp_progs.skel.h"
#include "xsk.h"
#include "xskxceiver.h"

--
2.50.1