[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 <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 *, const char *);

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, const char *dev)
{
	struct tc_hfsc_qopt 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, const char *dev)
{
	struct tc_service_curve rsc = {}, fsc = {}, usc = {};
	int rsc_ok = 0, fsc_ok = 0, usc_ok = 0;
	struct rtattr *tail;

	while (argc > 0) {
		if (matches(*argv, "rt") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &rsc, dev) < 0) {
				explain1("rt");
				return -1;
			}
			rsc_ok = 1;
		} else if (matches(*argv, "ls") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &fsc, dev) < 0) {
				explain1("ls");
				return -1;
			}
			fsc_ok = 1;
		} else if (matches(*argv, "sc") == 0) {
			NEXT_ARG();
			if (hfsc_get_sc(&argc, &argv, &rsc, dev) < 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, dev) < 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, const char *dev)
{
	char **argv = *argvp;
	int argc = *argcp;
	unsigned int m1 = 0, d = 0, m2 = 0;

	if (matches(*argv, "m1") == 0) {
		NEXT_ARG();
		if (strchr(*argv, '%')) {
			if (get_percent_rate(&m1, *argv, dev)) {
				explain1("m1");
				return -1;
			}
		} else 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 (strchr(*argv, '%')) {
			if (get_percent_rate(&m2, *argv, dev)) {
				explain1("m2");
				return -1;
			}
		} else 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, const char *dev)
{
	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 (strchr(*argv, '%')) {
			if (get_percent_rate(&rate, *argv, dev)) {
				explain1("rate");
				return -1;
			}
		} else 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, const char *dev)
{
	if (hfsc_get_sc1(argcp, argvp, sc, dev) < 0 &&
	    hfsc_get_sc2(argcp, argvp, sc, dev) < 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>
aba5acdf SH	16	#include <fcntl.h>
	17	#include <sys/socket.h>
	18	#include <netinet/in.h>
	19	#include <arpa/inet.h>
	20	#include <string.h>
7518df00	21	#include <math.h>
aba5acdf SH	22
	23	#include "utils.h"
	24	#include "tc_util.h"
	25
859af0a5 SH	26	static int hfsc_get_sc(int , char **,
859af0a5 SH	27	struct tc_service_curve , const char );
7518df00	28
	29	static void
	30	explain_qdisc(void)
	31	{
	32	fprintf(stderr,
	33	"Usage: ... hfsc [ default CLASSID ]\n"
	34	"\n"
	35	" default: default class for unclassified packets\n"
	36	);
	37	}
	38
	39	static void
	40	explain_class(void)
	41	{
	42	fprintf(stderr,
b7de67da	43	"Usage: ... hfsc [ [ rt SC ] [ ls SC ] \| [ sc SC ] ] [ ul SC ]\n"
7518df00	44	"\n"
41f60041	45	"SC := [ [ m1 BPS ] d SEC ] m2 BPS\n"
7518df00	46	"\n"
	47	" m1 : slope of first segment\n"
	48	" d : x-coordinate of intersection\n"
	49	" m2 : slope of second segment\n"
	50	"\n"
	51	"Alternative format:\n"
	52	"\n"
	53	"SC := [ [ umax BYTE ] dmax SEC ] rate BPS\n"
	54	"\n"
	55	" umax : maximum unit of work\n"
	56	" dmax : maximum delay\n"
	57	" rate : rate\n"
	58	"\n"
41f60041 MS	59	"Remarks:\n"
	60	" - at least one of 'rt', 'ls' or 'sc' must be specified\n"
	61	" - 'ul' can only be specified with 'ls' or 'sc'\n"
	62	"\n"
7518df00	63	);
	64	}
	65
	66	static void
	67	explain1(char *arg)
	68	{
	69	fprintf(stderr, "HFSC: Illegal \"%s\"\n", arg);
	70	}
	71
	72	static int
859af0a5 SH	73	hfsc_parse_opt(struct qdisc_util qu, int argc, char *argv,
859af0a5 SH	74	struct nlmsghdr n, const char dev)
7518df00	75	{
d17b136f	76	struct tc_hfsc_qopt qopt = {};
7518df00	77
	78	while (argc > 0) {
	79	if (matches(*argv, "default") == 0) {
	80	NEXT_ARG();
	81	if (qopt.defcls != 0) {
	82	fprintf(stderr, "HFSC: Double \"default\"\n");
	83	return -1;
	84	}
	85	if (get_u16(&qopt.defcls, *argv, 16) < 0) {
	86	explain1("default");
	87	return -1;
	88	}
	89	} else if (matches(*argv, "help") == 0) {
	90	explain_qdisc();
	91	return -1;
	92	} else {
	93	fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
	94	explain_qdisc();
	95	return -1;
	96	}
	97	argc--, argv++;
	98	}
	99
	100	addattr_l(n, 1024, TCA_OPTIONS, &qopt, sizeof(qopt));
	101	return 0;
	102	}
	103
	104	static int
	105	hfsc_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
aba5acdf	106	{
7518df00	107	struct tc_hfsc_qopt *qopt;
	108
	109	if (opt == NULL)
	110	return 0;
	111	if (RTA_PAYLOAD(opt) < sizeof(*qopt))
	112	return -1;
	113	qopt = RTA_DATA(opt);
	114
	115	if (qopt->defcls != 0)
	116	fprintf(f, "default %x ", qopt->defcls);
	117
	118	return 0;
aba5acdf SH	119	}
aba5acdf SH	120
7518df00	121	static int
7518df00	122	hfsc_print_xstats(struct qdisc_util qu, FILE f, struct rtattr *xstats)
aba5acdf	123	{
7518df00	124	struct tc_hfsc_stats *st;
	125
	126	if (xstats == NULL)
	127	return 0;
	128	if (RTA_PAYLOAD(xstats) < sizeof(*st))
	129	return -1;
	130	st = RTA_DATA(xstats);
	131
	132	fprintf(f, " period %u ", st->period);
	133	if (st->work != 0)
b906243b	134	fprintf(f, "work %llu bytes ", (unsigned long long) st->work);
7518df00	135	if (st->rtwork != 0)
b906243b	136	fprintf(f, "rtwork %llu bytes ", (unsigned long long) st->rtwork);
7518df00	137	fprintf(f, "level %u ", st->level);
	138	fprintf(f, "\n");
	139
	140	return 0;
	141	}
	142
	143	static int
	144	hfsc_parse_class_opt(struct qdisc_util qu, int argc, char *argv,
927e3cfb	145	struct nlmsghdr n, const char dev)
7518df00	146	{
d17b136f PS	147	struct tc_service_curve rsc = {}, fsc = {}, usc = {};
d17b136f PS	148	int rsc_ok = 0, fsc_ok = 0, usc_ok = 0;
7518df00	149	struct rtattr *tail;
7518df00	150
7518df00	151	while (argc > 0) {
	152	if (matches(*argv, "rt") == 0) {
	153	NEXT_ARG();
927e3cfb	154	if (hfsc_get_sc(&argc, &argv, &rsc, dev) < 0) {
7518df00	155	explain1("rt");
	156	return -1;
	157	}
	158	rsc_ok = 1;
	159	} else if (matches(*argv, "ls") == 0) {
	160	NEXT_ARG();
927e3cfb	161	if (hfsc_get_sc(&argc, &argv, &fsc, dev) < 0) {
7518df00	162	explain1("ls");
	163	return -1;
	164	}
	165	fsc_ok = 1;
b7de67da	166	} else if (matches(*argv, "sc") == 0) {
b7de67da	167	NEXT_ARG();
927e3cfb	168	if (hfsc_get_sc(&argc, &argv, &rsc, dev) < 0) {
b7de67da	169	explain1("sc");
	170	return -1;
	171	}
	172	memcpy(&fsc, &rsc, sizeof(fsc));
	173	rsc_ok = 1;
	174	fsc_ok = 1;
7518df00	175	} else if (matches(*argv, "ul") == 0) {
7518df00	176	NEXT_ARG();
927e3cfb	177	if (hfsc_get_sc(&argc, &argv, &usc, dev) < 0) {
7518df00	178	explain1("ul");
	179	return -1;
	180	}
	181	usc_ok = 1;
	182	} else if (matches(*argv, "help") == 0) {
	183	explain_class();
	184	return -1;
	185	} else {
	186	fprintf(stderr, "HFSC: What is \"%s\" ?\n", *argv);
	187	explain_class();
	188	return -1;
	189	}
	190	argc--, argv++;
	191	}
	192
	193	if (!(rsc_ok \|\| fsc_ok \|\| usc_ok)) {
	194	fprintf(stderr, "HFSC: no parameters given\n");
	195	explain_class();
	196	return -1;
	197	}
	198	if (usc_ok && !fsc_ok) {
32a121cb	199	fprintf(stderr, "HFSC: Upper-limit Service Curve without Link-Share Service Curve\n");
7518df00	200	explain_class();
	201	return -1;
	202	}
	203
4a86fe19	204	tail = NLMSG_TAIL(n);
7518df00	205
	206	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	207	if (rsc_ok)
	208	addattr_l(n, 1024, TCA_HFSC_RSC, &rsc, sizeof(rsc));
	209	if (fsc_ok)
	210	addattr_l(n, 1024, TCA_HFSC_FSC, &fsc, sizeof(fsc));
	211	if (usc_ok)
	212	addattr_l(n, 1024, TCA_HFSC_USC, &usc, sizeof(usc));
	213
4a86fe19	214	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
7518df00	215	return 0;
aba5acdf SH	216	}
aba5acdf SH	217
7518df00	218	static void
7518df00	219	hfsc_print_sc(FILE f, char name, struct tc_service_curve *sc)
aba5acdf	220	{
7518df00	221	SPRINT_BUF(b1);
	222
	223	fprintf(f, "%s ", name);
	224	fprintf(f, "m1 %s ", sprint_rate(sc->m1, b1));
8f34caaf	225	fprintf(f, "d %s ", sprint_time(tc_core_ktime2time(sc->d), b1));
7518df00	226	fprintf(f, "m2 %s ", sprint_rate(sc->m2, b1));
aba5acdf SH	227	}
aba5acdf SH	228
7518df00	229	static int
	230	hfsc_print_class_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	231	{
	232	struct rtattr *tb[TCA_HFSC_MAX+1];
	233	struct tc_service_curve rsc = NULL, fsc = NULL, *usc = NULL;
	234
	235	if (opt == NULL)
	236	return 0;
	237
ac2fc2df	238	parse_rtattr_nested(tb, TCA_HFSC_MAX, opt);
7518df00	239
	240	if (tb[TCA_HFSC_RSC]) {
	241	if (RTA_PAYLOAD(tb[TCA_HFSC_RSC]) < sizeof(*rsc))
	242	fprintf(stderr, "HFSC: truncated realtime option\n");
	243	else
	244	rsc = RTA_DATA(tb[TCA_HFSC_RSC]);
	245	}
	246	if (tb[TCA_HFSC_FSC]) {
	247	if (RTA_PAYLOAD(tb[TCA_HFSC_FSC]) < sizeof(*fsc))
	248	fprintf(stderr, "HFSC: truncated linkshare option\n");
	249	else
	250	fsc = RTA_DATA(tb[TCA_HFSC_FSC]);
	251	}
	252	if (tb[TCA_HFSC_USC]) {
	253	if (RTA_PAYLOAD(tb[TCA_HFSC_USC]) < sizeof(*usc))
	254	fprintf(stderr, "HFSC: truncated upperlimit option\n");
	255	else
	256	usc = RTA_DATA(tb[TCA_HFSC_USC]);
	257	}
	258
ae665a52	259
b7de67da	260	if (rsc != NULL && fsc != NULL &&
	261	memcmp(rsc, fsc, sizeof(*rsc)) == 0)
	262	hfsc_print_sc(f, "sc", rsc);
	263	else {
	264	if (rsc != NULL)
	265	hfsc_print_sc(f, "rt", rsc);
	266	if (fsc != NULL)
	267	hfsc_print_sc(f, "ls", fsc);
	268	}
7518df00	269	if (usc != NULL)
	270	hfsc_print_sc(f, "ul", usc);
	271
	272	return 0;
	273	}
ae665a52	274
95812b56	275	struct qdisc_util hfsc_qdisc_util = {
f2f99e2e SH	276	.id = "hfsc",
	277	.parse_qopt = hfsc_parse_opt,
	278	.print_qopt = hfsc_print_opt,
	279	.print_xstats = hfsc_print_xstats,
	280	.parse_copt = hfsc_parse_class_opt,
	281	.print_copt = hfsc_print_class_opt,
aba5acdf SH	282	};
aba5acdf SH	283
7518df00	284	static int
859af0a5 SH	285	hfsc_get_sc1(int argcp, char **argvp,
859af0a5 SH	286	struct tc_service_curve sc, const char dev)
7518df00	287	{
	288	char *argv = argvp;
	289	int argc = *argcp;
	290	unsigned int m1 = 0, d = 0, m2 = 0;
	291
	292	if (matches(*argv, "m1") == 0) {
	293	NEXT_ARG();
927e3cfb ND	294	if (strchr(*argv, '%')) {
	295	if (get_percent_rate(&m1, *argv, dev)) {
	296	explain1("m1");
	297	return -1;
	298	}
	299	} else if (get_rate(&m1, *argv) < 0) {
7518df00	300	explain1("m1");
	301	return -1;
	302	}
	303	NEXT_ARG();
	304	}
	305
	306	if (matches(*argv, "d") == 0) {
	307	NEXT_ARG();
8f34caaf	308	if (get_time(&d, *argv) < 0) {
7518df00	309	explain1("d");
	310	return -1;
	311	}
	312	NEXT_ARG();
	313	}
	314
	315	if (matches(*argv, "m2") == 0) {
	316	NEXT_ARG();
927e3cfb ND	317	if (strchr(*argv, '%')) {
	318	if (get_percent_rate(&m2, *argv, dev)) {
	319	explain1("m2");
	320	return -1;
	321	}
	322	} else if (get_rate(&m2, *argv) < 0) {
7518df00	323	explain1("m2");
	324	return -1;
	325	}
	326	} else
	327	return -1;
	328
	329	sc->m1 = m1;
f0bda7e5	330	sc->d = tc_core_time2ktime(d);
7518df00	331	sc->m2 = m2;
	332
	333	*argvp = argv;
	334	*argcp = argc;
	335	return 0;
	336	}
	337
	338	static int
927e3cfb	339	hfsc_get_sc2(int argcp, char *argvp, struct tc_service_curve sc, const char *dev)
7518df00	340	{
	341	char *argv = argvp;
	342	int argc = *argcp;
	343	unsigned int umax = 0, dmax = 0, rate = 0;
	344
	345	if (matches(*argv, "umax") == 0) {
	346	NEXT_ARG();
	347	if (get_size(&umax, *argv) < 0) {
	348	explain1("umax");
	349	return -1;
	350	}
	351	NEXT_ARG();
	352	}
	353
	354	if (matches(*argv, "dmax") == 0) {
	355	NEXT_ARG();
8f34caaf	356	if (get_time(&dmax, *argv) < 0) {
7518df00	357	explain1("dmax");
	358	return -1;
	359	}
	360	NEXT_ARG();
	361	}
	362
	363	if (matches(*argv, "rate") == 0) {
	364	NEXT_ARG();
927e3cfb ND	365	if (strchr(*argv, '%')) {
	366	if (get_percent_rate(&rate, *argv, dev)) {
	367	explain1("rate");
	368	return -1;
	369	}
	370	} else if (get_rate(&rate, *argv) < 0) {
7518df00	371	explain1("rate");
	372	return -1;
	373	}
	374	} else
	375	return -1;
	376
	377	if (umax != 0 && dmax == 0) {
	378	fprintf(stderr, "HFSC: umax given but dmax is zero.\n");
	379	return -1;
	380	}
	381
f0bda7e5	382	if (dmax != 0 && ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax) > rate) {
7518df00	383	/*
	384	* concave curve, slope of first segment is umax/dmax,
	385	* intersection is at dmax
	386	*/
f0bda7e5 PM	387	sc->m1 = ceil(1.0 * umax * TIME_UNITS_PER_SEC / dmax); /* in bps */
f0bda7e5 PM	388	sc->d = tc_core_time2ktime(dmax);
7518df00	389	sc->m2 = rate;
	390	} else {
	391	/*
	392	* convex curve, slope of first segment is 0, intersection
	393	* is at dmax - umax / rate
	394	*/
	395	sc->m1 = 0;
f0bda7e5	396	sc->d = tc_core_time2ktime(ceil(dmax - umax * TIME_UNITS_PER_SEC / rate));
7518df00	397	sc->m2 = rate;
	398	}
	399
	400	*argvp = argv;
	401	*argcp = argc;
	402	return 0;
	403	}
	404
	405	static int
927e3cfb	406	hfsc_get_sc(int argcp, char *argvp, struct tc_service_curve sc, const char *dev)
7518df00	407	{
927e3cfb ND	408	if (hfsc_get_sc1(argcp, argvp, sc, dev) < 0 &&
927e3cfb ND	409	hfsc_get_sc2(argcp, argvp, sc, dev) < 0)
7518df00	410	return -1;
	411
	412	if (sc->m1 == 0 && sc->m2 == 0) {
	413	fprintf(stderr, "HFSC: Service Curve has two zero slopes\n");
	414	return -1;
	415	}
	416
	417	return 0;
	418	}