Differential D30470 Diff 89925 sys/netinet/cc/cc_newreno.c

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sys/netinet/cc/cc_newreno.c

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	newreno_cong_signal(struct cc_var *ccv, uint32_t type)			newreno_cong_signal(struct cc_var *ccv, uint32_t type)
	{			{
	struct newreno *nreno;			struct newreno *nreno;
	uint32_t beta, beta_ecn, cwin, factor;			uint32_t beta, beta_ecn, cwin, factor;
	u_int mss;			u_int mss;

	cwin = CCV(ccv, snd_cwnd);			cwin = CCV(ccv, snd_cwnd);
	mss = tcp_fixed_maxseg(ccv->ccvc.tcp);			mss = tcp_fixed_maxseg(ccv->ccvc.tcp);
	nreno = ccv->cc_data;			/*
				* Other TCP congestion controls use newreno_cong_signal(), but
				* with their own private cc_data. Make sure the cc_data is used
				* correctly.
				*/
				nreno = (CC_ALGO(ccv->ccvc.tcp) == &newreno_cc_algo) ? ccv->cc_data : NULL;
	beta = (nreno == NULL) ? V_newreno_beta : nreno->beta;			beta = (nreno == NULL) ? V_newreno_beta : nreno->beta;
	beta_ecn = (nreno == NULL) ? V_newreno_beta_ecn : nreno->beta_ecn;			beta_ecn = (nreno == NULL) ? V_newreno_beta_ecn : nreno->beta_ecn;

	/*			/*
	* Note that we only change the backoff for ECN if the			* Note that we only change the backoff for ECN if the
	* global sysctl V_cc_do_abe is set <or> the stack itself			* global sysctl V_cc_do_abe is set <or> the stack itself
	* has set a flag in our newreno_flags (due to pacing) telling			* has set a flag in our newreno_flags (due to pacing) telling
	* us to use the lower valued back-off.			* us to use the lower valued back-off.
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	static int			static int
	newreno_ctl_output(struct cc_var ccv, struct sockopt sopt, void *buf)			newreno_ctl_output(struct cc_var ccv, struct sockopt sopt, void *buf)
	{			{
	struct newreno *nreno;			struct newreno *nreno;
	struct cc_newreno_opts *opt;			struct cc_newreno_opts *opt;

	if (sopt->sopt_valsize != sizeof(struct cc_newreno_opts))			if (sopt->sopt_valsize != sizeof(struct cc_newreno_opts))
	return (EMSGSIZE);			return (EMSGSIZE);

				if (CC_ALGO(ccv->ccvc.tcp) != &newreno_cc_algo)
				return (ENOPROTOOPT);

	nreno = ccv->cc_data;			nreno = ccv->cc_data;
	opt = buf;			opt = buf;

	switch (sopt->sopt_dir) {			switch (sopt->sopt_dir) {
	case SOPT_SET:			case SOPT_SET:
	/* We cannot set without cc_data memory. */			/* We cannot set without cc_data memory. */
	if (nreno == NULL) {			if (nreno == NULL) {
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