samples/bpf/tcp_basertt_kern.c

Source file repositories/reference/linux-study-clean/samples/bpf/tcp_basertt_kern.c

File Facts

System
Linux kernel
Corpus path
samples/bpf/tcp_basertt_kern.c
Extension
.c
Size
1731 bytes
Lines
72
Domain
Support Tooling And Documentation
Bucket
samples
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

switch (op) {
		case BPF_SOCK_OPS_BASE_RTT:
			n = bpf_getsockopt(skops, SOL_TCP, TCP_CONGESTION,
					   cong, sizeof(cong));
			if (!n && !__builtin_memcmp(cong, nv, sizeof(nv))) {
				/* Set base_rtt to 80us */
				rv = 80;
			} else if (n) {
				rv = n;
			} else {
				rv = -1;
			}
			break;
		default:
			rv = -1;
		}
	} else {
		rv = -1;
	}
#ifdef DEBUG
	bpf_printk("Returning %d\n", rv);
#endif
	skops->reply = rv;
	return 1;
}
char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes