selftests/bpf: Adjust data size to have ETH_HLEN

The function bpf_test_init() now returns an error if user_size
(.data_size_in) is less than ETH_HLEN, causing the tests to
fail. Adjust the data size to ensure it meets the requirement of
ETH_HLEN.

Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250121150643.671650-2-syoshida@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Author: Shigeru Yoshida

tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c

@@ -52,10 +52,10 @@ static void test_xdp_with_cpumap_helpers(void)
 	ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to cpumap entry prog_id");
 
 	/* send a packet to trigger any potential bugs in there */
-	char data[10] = {};
+	char data[ETH_HLEN] = {};
 	DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
 			    .data_in = &data,
-			    .data_size_in = 10,
+			    .data_size_in = sizeof(data),
 			    .flags = BPF_F_TEST_XDP_LIVE_FRAMES,
 			    .repeat = 1,
 		);

tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c

@@ -23,7 +23,7 @@ static void test_xdp_with_devmap_helpers(void)
 	__u32 len = sizeof(info);
 	int err, dm_fd, dm_fd_redir, map_fd;
 	struct nstoken *nstoken = NULL;
-	char data[10] = {};
+	char data[ETH_HLEN] = {};
 	__u32 idx = 0;
 
 	SYS(out_close, "ip netns add %s", TEST_NS);
@@ -58,7 +58,7 @@ static void test_xdp_with_devmap_helpers(void)
 	/* send a packet to trigger any potential bugs in there */
 	DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
 			    .data_in = &data,
-			    .data_size_in = 10,
+			    .data_size_in = sizeof(data),
 			    .flags = BPF_F_TEST_XDP_LIVE_FRAMES,
 			    .repeat = 1,
 		);
@@ -158,7 +158,7 @@ static void test_xdp_with_devmap_helpers_veth(void)
 	struct nstoken *nstoken = NULL;
 	__u32 len = sizeof(info);
 	int err, dm_fd, dm_fd_redir, map_fd, ifindex_dst;
-	char data[10] = {};
+	char data[ETH_HLEN] = {};
 	__u32 idx = 0;
 
 	SYS(out_close, "ip netns add %s", TEST_NS);
@@ -208,7 +208,7 @@ static void test_xdp_with_devmap_helpers_veth(void)
 	/* send a packet to trigger any potential bugs in there */
 	DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
 			    .data_in = &data,
-			    .data_size_in = 10,
+			    .data_size_in = sizeof(data),
 			    .flags = BPF_F_TEST_XDP_LIVE_FRAMES,
 			    .repeat = 1,
 		);