Function cc_default_algo

freebsd/netinet/cc/cc.c:92–124

* Sysctl handler to show and change the default CC algorithm. */

 * Sysctl handler to show and change the default CC algorithm.
 */
static int
cc_default_algo(SYSCTL_HANDLER_ARGS)
{
	char default_cc[TCP_CA_NAME_MAX];
	struct cc_algo *funcs;
	int error;

	/* Get the current default: */
	CC_LIST_RLOCK();
	strlcpy(default_cc, CC_DEFAULT()->name, sizeof(default_cc));
	CC_LIST_RUNLOCK();

	error = sysctl_handle_string(oidp, default_cc, sizeof(default_cc), req);

	/* Check for error or no change */
	if (error != 0 || req->newptr == NULL)
		goto done;

	error = ESRCH;

	/* Find algo with specified name and set it to default. */
	CC_LIST_RLOCK();
	STAILQ_FOREACH(funcs, &cc_list, entries) {
		if (strncmp(default_cc, funcs->name, sizeof(default_cc)))
			continue;
		V_default_cc_ptr = funcs;
		error = 0;
		break;
	}
	CC_LIST_RUNLOCK();
done:
	return (error);
}

/*
 * Sysctl handler to display the list of available CC algorithms.