drivers/net/wireguard/selftest/ratelimiter.c

File Facts

System

Linux kernel

Corpus path

drivers/net/wireguard/selftest/ratelimiter.c

Extension

.c

Size

5354 bytes

Lines

225

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/jiffies.h

Detected Declarations

• function maximum_jiffies_at_index
• function timings_test
• function capacity_test
• function wg_ratelimiter_selftest

Annotated Snippet

if (ret == -ETIMEDOUT) {
			if (!trials--) {
				test += test_count;
				goto err;
			}
			continue;
		} else if (ret < 0) {
			test += test_count;
			goto err;
		} else {
			test += test_count;
			break;
		}
	}

	for (trials = TRIALS_BEFORE_GIVING_UP;;) {
		int test_count = 0;

		if (capacity_test(skb4, hdr4, &test_count) < 0) {
			if (!trials--) {
				test += test_count;
				goto err;
			}
			continue;
		}
		test += test_count;
		break;
	}

	success = true;

err:
	kfree_skb(skb4);
#if IS_ENABLED(CONFIG_IPV6)
	kfree_skb(skb6);
#endif
err_nofree:
	wg_ratelimiter_uninit();
	wg_ratelimiter_uninit();
	wg_ratelimiter_uninit();
	/* Uninit one extra time to check underflow detection. */
	wg_ratelimiter_uninit();
out:
	if (success)
		pr_info("ratelimiter self-tests: pass\n");
	else
		pr_err("ratelimiter self-test %d: FAIL\n", test);

	return success;
}
#endif

Annotation

• Immediate include surface: `linux/jiffies.h`.
• Detected declarations: `function maximum_jiffies_at_index`, `function timings_test`, `function capacity_test`, `function wg_ratelimiter_selftest`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.