tools/testing/selftests/bpf/progs/test_hash_large_key.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_hash_large_key.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_hash_large_key.c
Extension
.c
Size
793 bytes
Lines
45
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;
};

SEC("raw_tracepoint/sys_enter")
int bpf_hash_large_key_test(void *ctx)
{
	int zero = 0, value = 42;
	struct bigelement *key;

	key = bpf_map_lookup_elem(&key_map, &zero);
	if (!key)
		return 0;

	key->c = 1;
	if (bpf_map_update_elem(&hash_map, key, &value, BPF_ANY))
		return 0;

	return 0;
}

Annotation

Implementation Notes