[mirror_iproute2.git] / tc / q_hfsc.c

/*
 * q_hfsc.c	HFSC.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Patrick McHardy, <kaber@trash.net>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <math.h>

#include "utils.h"
#include "tc_util.h"

static int hfsc_get_sc(int *, char ***, struct tc_service_curve *);


static void
explain_qdisc(void)
{
	fprintf(stderr,
		"Usage: ... hfsc [ default CLASSID ]\n"
		"\n"
		" default: default class for unclassified packets\n"
	);
}

static void
explain_class(void)
{
	fprintf(stderr,
		"Usage: ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]\n"
		"\n"
		"SC := [ [ m1 BPS ] d SEC ] m2 BPS\n"
		"\n"
		" m1 : slope of first segment\n"
		" d  : x-coordinate of intersection\n"
		" m2 : slope of second segment\n"
		"\n"
		"Alternative format:\n"
		"\n"
		"SC := [ [ umax BYTE ] dmax SEC ] rate BPS\n"
		"\n"
		" umax : maximum unit of work\n"
		" dmax : maximum delay\n"
		" rate : rate\n"
		"\n"
		"Remarks:\n"
		" - at least one of 'rt', 'ls' or 'sc' must be specified\n"
		" - 'ul' can only be specified with 'ls' or 'sc'\n"
		"\n"
	);
}

static void
explain1(char *arg)
{
	fprintf(stderr, "HFSC: Illegal \"%s\"\n", arg);
}

static int
hfsc_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
{
	struct tc_hfsc_qopt qopt;

	memset(&qopt, 0, sizeof(qopt));

	while (argc > 0) {
		if (matches(*argv, "default") == 0) {
			NEXT_ARG();
			if (qopt.defcls != 0) {
				fprintf(stderr, "HFSC: Double \"default\"\n");
				return -1;
			}
			if (get_u16(&qopt.defcls, *argv, 16) < 0) {
				explain1("default");
				return -1;
			}
		} else if (matches(*argv, "help") == 0) {
			explain_qdisc();
			return -1;
		} else {
			fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
			explain_qdisc();
			return -1;
		}
		argc--, argv++;
	}

	addattr_l(n, 1024, TCA_OPTIONS, &qopt, sizeof(qopt));
	return 0;
}

static int
hfsc_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
	struct tc_hfsc_qopt *qopt;

	if (opt == NULL)
		return 0;
	if (RTA_PAYLOAD(opt) < sizeof(*qopt))
		return -1;
	qopt = RTA_DATA(opt);

	if (qopt->defcls != 0)
		fprintf(f, "default %x ", qopt->defcls);

	return 0;
}

static int
hfsc_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
{
	struct tc_hfsc_stats *st;

	if (xstats == NULL)
		return 0;
	if (RTA_PAYLOAD(xstats) < sizeof(*st))
		return -1;
	st = RTA_DATA(xstats);

	fprintf(f, " period %u ", st->period);
	if (st->work != 0)
		fprintf(f, "work %llu bytes ", (unsigned long long) st->work);
	if (st->rtwork != 0)
		fprintf(f, "rtwork %llu bytes ", (unsigned long long) st->rtwork);
	fprintf(f, "level %u ", st->level);
	fprintf(f, "\n");

	return 0;
}

static int
hfsc_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
                     struct nlmsghdr *n)
{
	struct tc_service_curve rsc, fsc, usc;
	int rsc_ok, fsc_ok, usc_ok;
	struct rtattr *tail;

	memset(&rsc, 0, sizeof(rsc));
	memset(&fsc, 0, sizeof(fsc));
	memset(&usc, 0, sizeof(usc));
	rsc_ok = fsc_ok = usc_ok = 0;

	while (argc > 0) {
		if (matches(*argv, "rt") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
				explain1("rt");
				return -1;
			}
			rsc_ok = 1;
		} else if (matches(*argv, "ls") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &fsc) < 0) {
				explain1("ls");
				return -1;
			}
			fsc_ok = 1;
		} else if (matches(*argv, "sc") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
				explain1("sc");
				return -1;
			}
			memcpy(&fsc, &rsc, sizeof(fsc));
			rsc_ok = 1;
			fsc_ok = 1;
		} else if (matches(*argv, "ul") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &usc) < 0) {
				explain1("ul");
				return -1;
			}
			usc_ok = 1;
		} else if (matches(*argv, "help") == 0) {
			explain_class();
			return -1;
		} else {
			fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
			explain_class();
			return -1;
		}
		argc--, argv++;
	}

	if (!(rsc_ok || fsc_ok || usc_ok)) {
		fprintf(stderr, "HFSC: no parameters given\n");
		explain_class();
		return -1;
	}
	if (usc_ok && !fsc_ok) {
		fprintf(stderr, "HFSC: Upper-limit Service Curve without "
		                "Link-Share Service Curve\n");
		explain_class();
		return -1;
	}

	tail = NLMSG_TAIL(n);

	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	if (rsc_ok)
		addattr_l(n, 1024, TCA_HFSC_RSC, &rsc, sizeof(rsc));
	if (fsc_ok)
		addattr_l(n, 1024, TCA_HFSC_FSC, &fsc, sizeof(fsc));
	if (usc_ok)
		addattr_l(n, 1024, TCA_HFSC_USC, &usc, sizeof(usc));

	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
	return 0;
}

static void
hfsc_print_sc(FILE *f, char *name, struct tc_service_curve *sc)
{
	SPRINT_BUF(b1);

	fprintf(f, "%s ", name);
	fprintf(f, "m1 %s ", sprint_rate(sc->m1, b1));
	fprintf(f, "d %s ", sprint_time(tc_core_ktime2time(sc->d), b1));
	fprintf(f, "m2 %s ", sprint_rate(sc->m2, b1));
}

static int
hfsc_print_class_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
	struct rtattr *tb[TCA_HFSC_MAX+1];
	struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL;

	if (opt == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_HFSC_MAX, opt);

	if (tb[TCA_HFSC_RSC]) {
		if (RTA_PAYLOAD(tb[TCA_HFSC_RSC]) < sizeof(*rsc))
			fprintf(stderr, "HFSC: truncated realtime option\n");
		else
			rsc = RTA_DATA(tb[TCA_HFSC_RSC]);
	}
	if (tb[TCA_HFSC_FSC]) {
		if (RTA_PAYLOAD(tb[TCA_HFSC_FSC]) < sizeof(*fsc))
			fprintf(stderr, "HFSC: truncated linkshare option\n");
		else
			fsc = RTA_DATA(tb[TCA_HFSC_FSC]);
	}
	if (tb[TCA_HFSC_USC]) {
		if (RTA_PAYLOAD(tb[TCA_HFSC_USC]) < sizeof(*usc))
			fprintf(stderr, "HFSC: truncated upperlimit option\n");
		else
			usc = RTA_DATA(tb[TCA_HFSC_USC]);
	}


	if (rsc != NULL && fsc != NULL &&
	    memcmp(rsc, fsc, sizeof(*rsc)) == 0)
		hfsc_print_sc(f, "sc", rsc);
	else {
		if (rsc != NULL)
			hfsc_print_sc(f, "rt", rsc);
		if (fsc != NULL)
			hfsc_print_sc(f, "ls", fsc);
	}
	if (usc != NULL)
		hfsc_print_sc(f, "ul", usc);

	return 0;
}

struct qdisc_util hfsc_qdisc_util = {
	.id		= "hfsc",
	.parse_qopt	= hfsc_parse_opt,
	.print_qopt	= hfsc_print_opt,
	.print_xstats	= hfsc_print_xstats,
	.parse_copt	= hfsc_parse_class_opt,
	.print_copt	= hfsc_print_class_opt,
};

static int
hfsc_get_sc1(int *argcp, char ***argvp, struct tc_service_curve *sc)
{
	char **argv = *argvp;
	int argc = *argcp;
	unsigned int m1 = 0, d = 0, m2 = 0;

	if (matches(*argv, "m1") == 0) {
		NEXT_ARG();
		if (get_rate(&m1, *argv) < 0) {
			explain1("m1");
			return -1;
		}
		NEXT_ARG();
	}

	if (matches(*argv, "d") == 0) {
		NEXT_ARG();
		if (get_time(&d, *argv) < 0) {
			explain1("d");
			return -1;
		}
		NEXT_ARG();
	}

	if (matches(*argv, "m2") == 0) {
		NEXT_ARG();
		if (get_rate(&m2, *argv) < 0) {
			explain1("m2");
			return -1;
		}
	} else
		return -1;

	sc->m1 = m1;
	sc->d  = tc_core_time2ktime(d);
	sc->m2 = m2;

	*argvp = argv;
	*argcp = argc;
	return 0;
}

static int
hfsc_get_sc2(int *argcp, char ***argvp, struct tc_service_curve *sc)
{
	char **argv = *argvp;
	int argc = *argcp;
	unsigned int umax = 0, dmax = 0, rate = 0;

	if (matches(*argv, "umax") == 0) {
		NEXT_ARG();
		if (get_size(&umax, *argv) < 0) {
			explain1("umax");
			return -1;
		}
		NEXT_ARG();
	}

	if (matches(*argv, "dmax") == 0) {
		NEXT_ARG();
		if (get_time(&dmax, *argv) < 0) {
			explain1("dmax");
			return -1;
		}
		NEXT_ARG();
	}

	if (matches(*argv, "rate") == 0) {
		NEXT_ARG();
		if (get_rate(&rate, *argv) < 0) {
			explain1("rate");
			return -1;
		}
	} else
		return -1;

	if (umax != 0 && dmax == 0) {
		fprintf(stderr, "HFSC: umax given but dmax is zero.\n");
		return -1;
	}

	if (dmax != 0 && ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax) > rate) {
		/*
		 * concave curve, slope of first segment is umax/dmax,
		 * intersection is at dmax
		 */
		sc->m1 = ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax); /* in bps */
		sc->d  = tc_core_time2ktime(dmax);
		sc->m2 = rate;
	} else {
		/*
		 * convex curve, slope of first segment is 0, intersection
		 * is at dmax - umax / rate
		 */
		sc->m1 = 0;
		sc->d  = tc_core_time2ktime(ceil(dmax - umax * TIME_UNITS_PER_SEC / rate));
		sc->m2 = rate;
	}

	*argvp = argv;
	*argcp = argc;
	return 0;
}

static int
hfsc_get_sc(int *argcp, char ***argvp, struct tc_service_curve *sc)
{
	if (hfsc_get_sc1(argcp, argvp, sc) < 0 &&
	    hfsc_get_sc2(argcp, argvp, sc) < 0)
		return -1;

	if (sc->m1 == 0 && sc->m2 == 0) {
		fprintf(stderr, "HFSC: Service Curve has two zero slopes\n");
		return -1;
	}

	return 0;
}
Commit	Line	Data
aba5acdf	1	/*
7518df00	2	* q_hfsc.c HFSC.
aba5acdf SH	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
7518df00	9	* Authors: Patrick McHardy, <kaber@trash.net>
aba5acdf SH	10	*
	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <sys/socket.h>
	19	#include <netinet/in.h>
	20	#include <arpa/inet.h>
	21	#include <string.h>
7518df00	22	#include <math.h>
aba5acdf SH	23
	24	#include "utils.h"
	25	#include "tc_util.h"
	26
7518df00	27	static int hfsc_get_sc(int , char *, struct tc_service_curve );
aba5acdf	28
7518df00	29
	30	static void
	31	explain_qdisc(void)
	32	{
	33	fprintf(stderr,
	34	"Usage: ... hfsc [ default CLASSID ]\n"
	35	"\n"
	36	" default: default class for unclassified packets\n"
	37	);
	38	}
	39
	40	static void
	41	explain_class(void)
	42	{
	43	fprintf(stderr,
b7de67da	44	"Usage: ... hfsc [ [ rt SC ] [ ls SC ] \| [ sc SC ] ] [ ul SC ]\n"
7518df00	45	"\n"
41f60041	46	"SC := [ [ m1 BPS ] d SEC ] m2 BPS\n"
7518df00	47	"\n"
	48	" m1 : slope of first segment\n"
	49	" d : x-coordinate of intersection\n"
	50	" m2 : slope of second segment\n"
	51	"\n"
	52	"Alternative format:\n"
	53	"\n"
	54	"SC := [ [ umax BYTE ] dmax SEC ] rate BPS\n"
	55	"\n"
	56	" umax : maximum unit of work\n"
	57	" dmax : maximum delay\n"
	58	" rate : rate\n"
	59	"\n"
41f60041 MS	60	"Remarks:\n"
	61	" - at least one of 'rt', 'ls' or 'sc' must be specified\n"
	62	" - 'ul' can only be specified with 'ls' or 'sc'\n"
	63	"\n"
7518df00	64	);
	65	}
	66
	67	static void
	68	explain1(char *arg)
	69	{
	70	fprintf(stderr, "HFSC: Illegal \"%s\"\n", arg);
	71	}
	72
	73	static int
	74	hfsc_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	75	{
	76	struct tc_hfsc_qopt qopt;
	77
	78	memset(&qopt, 0, sizeof(qopt));
	79
	80	while (argc > 0) {
	81	if (matches(*argv, "default") == 0) {
	82	NEXT_ARG();
	83	if (qopt.defcls != 0) {
	84	fprintf(stderr, "HFSC: Double \"default\"\n");
	85	return -1;
	86	}
	87	if (get_u16(&qopt.defcls, *argv, 16) < 0) {
	88	explain1("default");
	89	return -1;
	90	}
	91	} else if (matches(*argv, "help") == 0) {
	92	explain_qdisc();
	93	return -1;
	94	} else {
	95	fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
	96	explain_qdisc();
	97	return -1;
	98	}
	99	argc--, argv++;
	100	}
	101
	102	addattr_l(n, 1024, TCA_OPTIONS, &qopt, sizeof(qopt));
	103	return 0;
	104	}
	105
	106	static int
	107	hfsc_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
aba5acdf	108	{
7518df00	109	struct tc_hfsc_qopt *qopt;
	110
	111	if (opt == NULL)
	112	return 0;
	113	if (RTA_PAYLOAD(opt) < sizeof(*qopt))
	114	return -1;
	115	qopt = RTA_DATA(opt);
	116
	117	if (qopt->defcls != 0)
	118	fprintf(f, "default %x ", qopt->defcls);
	119
	120	return 0;
aba5acdf SH	121	}
aba5acdf SH	122
7518df00	123	static int
7518df00	124	hfsc_print_xstats(struct qdisc_util qu, FILE f, struct rtattr *xstats)
aba5acdf	125	{
7518df00	126	struct tc_hfsc_stats *st;
	127
	128	if (xstats == NULL)
	129	return 0;
	130	if (RTA_PAYLOAD(xstats) < sizeof(*st))
	131	return -1;
	132	st = RTA_DATA(xstats);
	133
	134	fprintf(f, " period %u ", st->period);
	135	if (st->work != 0)
b906243b	136	fprintf(f, "work %llu bytes ", (unsigned long long) st->work);
7518df00	137	if (st->rtwork != 0)
b906243b	138	fprintf(f, "rtwork %llu bytes ", (unsigned long long) st->rtwork);
7518df00	139	fprintf(f, "level %u ", st->level);
	140	fprintf(f, "\n");
	141
	142	return 0;
	143	}
	144
	145	static int
	146	hfsc_parse_class_opt(struct qdisc_util qu, int argc, char *argv,
	147	struct nlmsghdr *n)
	148	{
	149	struct tc_service_curve rsc, fsc, usc;
	150	int rsc_ok, fsc_ok, usc_ok;
	151	struct rtattr *tail;
	152
	153	memset(&rsc, 0, sizeof(rsc));
	154	memset(&fsc, 0, sizeof(fsc));
	155	memset(&usc, 0, sizeof(usc));
	156	rsc_ok = fsc_ok = usc_ok = 0;
	157
	158	while (argc > 0) {
	159	if (matches(*argv, "rt") == 0) {
	160	NEXT_ARG();
	161	if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
	162	explain1("rt");
	163	return -1;
	164	}
	165	rsc_ok = 1;
	166	} else if (matches(*argv, "ls") == 0) {
	167	NEXT_ARG();
	168	if (hfsc_get_sc(&argc, &argv, &fsc) < 0) {
	169	explain1("ls");
	170	return -1;
	171	}
	172	fsc_ok = 1;
b7de67da	173	} else if (matches(*argv, "sc") == 0) {
	174	NEXT_ARG();
	175	if (hfsc_get_sc(&argc, &argv, &rsc) < 0) {
	176	explain1("sc");
	177	return -1;
	178	}
	179	memcpy(&fsc, &rsc, sizeof(fsc));
	180	rsc_ok = 1;
	181	fsc_ok = 1;
7518df00	182	} else if (matches(*argv, "ul") == 0) {
	183	NEXT_ARG();
	184	if (hfsc_get_sc(&argc, &argv, &usc) < 0) {
	185	explain1("ul");
	186	return -1;
	187	}
	188	usc_ok = 1;
	189	} else if (matches(*argv, "help") == 0) {
	190	explain_class();
	191	return -1;
	192	} else {
	193	fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
	194	explain_class();
	195	return -1;
	196	}
	197	argc--, argv++;
	198	}
	199
	200	if (!(rsc_ok \|\| fsc_ok \|\| usc_ok)) {
	201	fprintf(stderr, "HFSC: no parameters given\n");
	202	explain_class();
	203	return -1;
	204	}
	205	if (usc_ok && !fsc_ok) {
	206	fprintf(stderr, "HFSC: Upper-limit Service Curve without "
	207	"Link-Share Service Curve\n");
	208	explain_class();
	209	return -1;
	210	}
	211
4a86fe19	212	tail = NLMSG_TAIL(n);
7518df00	213
	214	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	215	if (rsc_ok)
	216	addattr_l(n, 1024, TCA_HFSC_RSC, &rsc, sizeof(rsc));
	217	if (fsc_ok)
	218	addattr_l(n, 1024, TCA_HFSC_FSC, &fsc, sizeof(fsc));
	219	if (usc_ok)
	220	addattr_l(n, 1024, TCA_HFSC_USC, &usc, sizeof(usc));
	221
4a86fe19	222	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
7518df00	223	return 0;
aba5acdf SH	224	}
aba5acdf SH	225
7518df00	226	static void
7518df00	227	hfsc_print_sc(FILE f, char name, struct tc_service_curve *sc)
aba5acdf	228	{
7518df00	229	SPRINT_BUF(b1);
	230
	231	fprintf(f, "%s ", name);
	232	fprintf(f, "m1 %s ", sprint_rate(sc->m1, b1));
8f34caaf	233	fprintf(f, "d %s ", sprint_time(tc_core_ktime2time(sc->d), b1));
7518df00	234	fprintf(f, "m2 %s ", sprint_rate(sc->m2, b1));
aba5acdf SH	235	}
aba5acdf SH	236
7518df00	237	static int
	238	hfsc_print_class_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	239	{
	240	struct rtattr *tb[TCA_HFSC_MAX+1];
	241	struct tc_service_curve rsc = NULL, fsc = NULL, *usc = NULL;
	242
	243	if (opt == NULL)
	244	return 0;
	245
ac2fc2df	246	parse_rtattr_nested(tb, TCA_HFSC_MAX, opt);
7518df00	247
	248	if (tb[TCA_HFSC_RSC]) {
	249	if (RTA_PAYLOAD(tb[TCA_HFSC_RSC]) < sizeof(*rsc))
	250	fprintf(stderr, "HFSC: truncated realtime option\n");
	251	else
	252	rsc = RTA_DATA(tb[TCA_HFSC_RSC]);
	253	}
	254	if (tb[TCA_HFSC_FSC]) {
	255	if (RTA_PAYLOAD(tb[TCA_HFSC_FSC]) < sizeof(*fsc))
	256	fprintf(stderr, "HFSC: truncated linkshare option\n");
	257	else
	258	fsc = RTA_DATA(tb[TCA_HFSC_FSC]);
	259	}
	260	if (tb[TCA_HFSC_USC]) {
	261	if (RTA_PAYLOAD(tb[TCA_HFSC_USC]) < sizeof(*usc))
	262	fprintf(stderr, "HFSC: truncated upperlimit option\n");
	263	else
	264	usc = RTA_DATA(tb[TCA_HFSC_USC]);
	265	}
	266
ae665a52	267
b7de67da	268	if (rsc != NULL && fsc != NULL &&
	269	memcmp(rsc, fsc, sizeof(*rsc)) == 0)
	270	hfsc_print_sc(f, "sc", rsc);
	271	else {
	272	if (rsc != NULL)
	273	hfsc_print_sc(f, "rt", rsc);
	274	if (fsc != NULL)
	275	hfsc_print_sc(f, "ls", fsc);
	276	}
7518df00	277	if (usc != NULL)
	278	hfsc_print_sc(f, "ul", usc);
	279
	280	return 0;
	281	}
ae665a52	282
95812b56	283	struct qdisc_util hfsc_qdisc_util = {
f2f99e2e SH	284	.id = "hfsc",
	285	.parse_qopt = hfsc_parse_opt,
	286	.print_qopt = hfsc_print_opt,
	287	.print_xstats = hfsc_print_xstats,
	288	.parse_copt = hfsc_parse_class_opt,
	289	.print_copt = hfsc_print_class_opt,
aba5acdf SH	290	};
aba5acdf SH	291
7518df00	292	static int
	293	hfsc_get_sc1(int argcp, char *argvp, struct tc_service_curve sc)
	294	{
	295	char *argv = argvp;
	296	int argc = *argcp;
	297	unsigned int m1 = 0, d = 0, m2 = 0;
	298
	299	if (matches(*argv, "m1") == 0) {
	300	NEXT_ARG();
	301	if (get_rate(&m1, *argv) < 0) {
	302	explain1("m1");
	303	return -1;
	304	}
	305	NEXT_ARG();
	306	}
	307
	308	if (matches(*argv, "d") == 0) {
	309	NEXT_ARG();
8f34caaf	310	if (get_time(&d, *argv) < 0) {
7518df00	311	explain1("d");
	312	return -1;
	313	}
	314	NEXT_ARG();
	315	}
	316
	317	if (matches(*argv, "m2") == 0) {
	318	NEXT_ARG();
	319	if (get_rate(&m2, *argv) < 0) {
	320	explain1("m2");
	321	return -1;
	322	}
	323	} else
	324	return -1;
	325
	326	sc->m1 = m1;
f0bda7e5	327	sc->d = tc_core_time2ktime(d);
7518df00	328	sc->m2 = m2;
	329
	330	*argvp = argv;
	331	*argcp = argc;
	332	return 0;
	333	}
	334
	335	static int
	336	hfsc_get_sc2(int argcp, char *argvp, struct tc_service_curve sc)
	337	{
	338	char *argv = argvp;
	339	int argc = *argcp;
	340	unsigned int umax = 0, dmax = 0, rate = 0;
	341
	342	if (matches(*argv, "umax") == 0) {
	343	NEXT_ARG();
	344	if (get_size(&umax, *argv) < 0) {
	345	explain1("umax");
	346	return -1;
	347	}
	348	NEXT_ARG();
	349	}
	350
	351	if (matches(*argv, "dmax") == 0) {
	352	NEXT_ARG();
8f34caaf	353	if (get_time(&dmax, *argv) < 0) {
7518df00	354	explain1("dmax");
	355	return -1;
	356	}
	357	NEXT_ARG();
	358	}
	359
	360	if (matches(*argv, "rate") == 0) {
	361	NEXT_ARG();
	362	if (get_rate(&rate, *argv) < 0) {
	363	explain1("rate");
	364	return -1;
	365	}
	366	} else
	367	return -1;
	368
	369	if (umax != 0 && dmax == 0) {
	370	fprintf(stderr, "HFSC: umax given but dmax is zero.\n");
	371	return -1;
	372	}
	373
f0bda7e5	374	if (dmax != 0 && ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax) > rate) {
7518df00	375	/*
	376	* concave curve, slope of first segment is umax/dmax,
	377	* intersection is at dmax
	378	*/
f0bda7e5 PM	379	sc->m1 = ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax); /* in bps */
f0bda7e5 PM	380	sc->d = tc_core_time2ktime(dmax);
7518df00	381	sc->m2 = rate;
	382	} else {
	383	/*
	384	* convex curve, slope of first segment is 0, intersection
	385	* is at dmax - umax / rate
	386	*/
	387	sc->m1 = 0;
f0bda7e5	388	sc->d = tc_core_time2ktime(ceil(dmax - umax * TIME_UNITS_PER_SEC / rate));
7518df00	389	sc->m2 = rate;
	390	}
	391
	392	*argvp = argv;
	393	*argcp = argc;
	394	return 0;
	395	}
	396
	397	static int
	398	hfsc_get_sc(int argcp, char *argvp, struct tc_service_curve sc)
	399	{
	400	if (hfsc_get_sc1(argcp, argvp, sc) < 0 &&
	401	hfsc_get_sc2(argcp, argvp, sc) < 0)
	402	return -1;
	403
	404	if (sc->m1 == 0 && sc->m2 == 0) {
	405	fprintf(stderr, "HFSC: Service Curve has two zero slopes\n");
	406	return -1;
	407	}
	408
	409	return 0;
	410	}