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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/hash_large_key.c
Extension
.c
Size
1038 bytes
Lines
44
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 bigelement {
		int a;
		char b[4096];
		long long c;
	} key;
	bzero(&key, sizeof(key));

	skel = test_hash_large_key__open_and_load();
	if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
		return;

	hash_map_fd = bpf_map__fd(skel->maps.hash_map);
	if (CHECK(hash_map_fd < 0, "bpf_map__fd", "failed\n"))
		goto cleanup;

	err = test_hash_large_key__attach(skel);
	if (CHECK(err, "attach_raw_tp", "err %d\n", err))
		goto cleanup;

	err = bpf_map_update_elem(hash_map_fd, &key, &value, BPF_ANY);
	if (CHECK(err, "bpf_map_update_elem", "errno=%d\n", errno))
		goto cleanup;

	key.c = 1;
	err = bpf_map_lookup_elem(hash_map_fd, &key, &value);
	if (CHECK(err, "bpf_map_lookup_elem", "errno=%d\n", errno))
		goto cleanup;

	CHECK_FAIL(value != 42);

cleanup:
	test_hash_large_key__destroy(skel);
}

Annotation

Implementation Notes