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

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/xdp_noinline.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/xdp_noinline.c
Extension
.c
Size
2229 bytes
Lines
74
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct vip_meta {
		__u32 flags;
		__u32 vip_num;
	} value = {.vip_num = VIP_NUM};
	__u32 stats_key = VIP_NUM;
	struct vip_stats {
		__u64 bytes;
		__u64 pkts;
	} stats[nr_cpus];
	struct real_definition {
		union {
			__be32 dst;
			__be32 dstv6[4];
		};
		__u8 flags;
	} real_def = {.dst = MAGIC_VAL};
	__u32 ch_key = 11, real_num = 3;
	int err, i;
	__u64 bytes = 0, pkts = 0;
	char buf[128];
	u32 *magic = (u32 *)buf;
	LIBBPF_OPTS(bpf_test_run_opts, topts,
		.data_in = &pkt_v4,
		.data_size_in = sizeof(pkt_v4),
		.data_out = buf,
		.data_size_out = sizeof(buf),
		.repeat = NUM_ITER,
	);

	skel = test_xdp_noinline__open_and_load();
	if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
		return;

	bpf_map_update_elem(bpf_map__fd(skel->maps.vip_map), &key, &value, 0);
	bpf_map_update_elem(bpf_map__fd(skel->maps.ch_rings), &ch_key, &real_num, 0);
	bpf_map_update_elem(bpf_map__fd(skel->maps.reals), &real_num, &real_def, 0);

	err = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.balancer_ingress_v4), &topts);
	ASSERT_OK(err, "ipv4 test_run");
	ASSERT_EQ(topts.retval, 1, "ipv4 test_run retval");
	ASSERT_EQ(topts.data_size_out, 54, "ipv4 test_run data_size_out");
	ASSERT_EQ(*magic, MAGIC_VAL, "ipv4 test_run magic");

	topts.data_in = &pkt_v6;
	topts.data_size_in = sizeof(pkt_v6);
	topts.data_out = buf;
	topts.data_size_out = sizeof(buf);

	err = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.balancer_ingress_v6), &topts);
	ASSERT_OK(err, "ipv6 test_run");
	ASSERT_EQ(topts.retval, 1, "ipv6 test_run retval");
	ASSERT_EQ(topts.data_size_out, 74, "ipv6 test_run data_size_out");
	ASSERT_EQ(*magic, MAGIC_VAL, "ipv6 test_run magic");

	bpf_map_lookup_elem(bpf_map__fd(skel->maps.stats), &stats_key, stats);
	for (i = 0; i < nr_cpus; i++) {
		bytes += stats[i].bytes;
		pkts += stats[i].pkts;
	}
	ASSERT_EQ(bytes, MAGIC_BYTES * NUM_ITER * 2, "stats bytes");
	ASSERT_EQ(pkts, NUM_ITER * 2, "stats pkts");
	test_xdp_noinline__destroy(skel);
}

Annotation

Implementation Notes