[mirror_iproute2.git] / tc / q_gred.c

/*
 * q_gred.c		GRED.
 *
 *		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:    J Hadi Salim(hadi@nortelnetworks.com)
 *             code ruthlessly ripped from
 *	       Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#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"

#include "tc_red.h"


#if 0
#define DPRINTF(format, args...) fprintf(stderr, format, ##args)
#else
#define DPRINTF(format, args...)
#endif

static void explain(void)
{
	fprintf(stderr, "Usage: tc qdisc { add | replace | change } ... gred setup vqs NUMBER\n");
	fprintf(stderr, "           default DEFAULT_VQ [ grio ] [ limit BYTES ]\n");
	fprintf(stderr, "       tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n");
	fprintf(stderr, "           min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n");
	fprintf(stderr, "           [ probability PROBABILITY ] [ bandwidth KBPS ]\n");
}

static int init_gred(struct qdisc_util *qu, int argc, char **argv,
		     struct nlmsghdr *n)
{

	struct rtattr *tail;
	struct tc_gred_sopt opt = { 0 };
	__u32 limit = 0;

	opt.def_DP = MAX_DPs;

	while (argc > 0) {
		DPRINTF(stderr, "init_gred: invoked with %s\n", *argv);
		if (strcmp(*argv, "vqs") == 0 ||
		    strcmp(*argv, "DPs") == 0) {
			NEXT_ARG();
			if (get_unsigned(&opt.DPs, *argv, 10)) {
				fprintf(stderr, "Illegal \"vqs\"\n");
				return -1;
			} else if (opt.DPs > MAX_DPs) {
				fprintf(stderr, "GRED: only %u VQs are currently supported\n",
					MAX_DPs);
				return -1;
			}
		} else if (strcmp(*argv, "default") == 0) {
			if (opt.DPs == 0) {
				fprintf(stderr, "\"default\" must be defined after \"vqs\"\n");
				return -1;
			}
			NEXT_ARG();
			if (get_unsigned(&opt.def_DP, *argv, 10)) {
				fprintf(stderr, "Illegal \"default\"\n");
				return -1;
			} else if (opt.def_DP >= opt.DPs) {
				fprintf(stderr, "\"default\" must be less than \"vqs\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "grio") == 0) {
			opt.grio = 1;
		} else if (strcmp(*argv, "limit") == 0) {
			NEXT_ARG();
			if (get_size(&limit, *argv)) {
				fprintf(stderr, "Illegal \"limit\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "help") == 0) {
			explain();
			return -1;
		} else {
			fprintf(stderr, "What is \"%s\"?\n", *argv);
			explain();
			return -1;
		}
		argc--; argv++;
	}

	if (!opt.DPs || opt.def_DP == MAX_DPs) {
		fprintf(stderr, "Illegal gred setup parameters\n");
		return -1;
	}

	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n", opt.DPs, opt.def_DP);
	n->nlmsg_flags |= NLM_F_CREATE;
	tail = NLMSG_TAIL(n);
	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
	if (limit)
		addattr32(n, 1024, TCA_GRED_LIMIT, limit);
	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
	return 0;
}
/*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*/
static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
{
	int ok = 0;
	struct tc_gred_qopt opt = { 0 };
	unsigned int burst = 0;
	unsigned int avpkt = 0;
	double probability = 0.02;
	unsigned int rate = 0;
	int parm;
	__u8 sbuf[256];
	struct rtattr *tail;
	__u32 max_P;

	opt.DP = MAX_DPs;

	while (argc > 0) {
		if (strcmp(*argv, "limit") == 0) {
			NEXT_ARG();
			if (get_size(&opt.limit, *argv)) {
				fprintf(stderr, "Illegal \"limit\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "setup") == 0) {
			if (ok) {
				fprintf(stderr, "Illegal \"setup\"\n");
				return -1;
			}
			return init_gred(qu, argc-1, argv+1, n);
		} else if (strcmp(*argv, "min") == 0) {
			NEXT_ARG();
			if (get_size(&opt.qth_min, *argv)) {
				fprintf(stderr, "Illegal \"min\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "max") == 0) {
			NEXT_ARG();
			if (get_size(&opt.qth_max, *argv)) {
				fprintf(stderr, "Illegal \"max\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "vq") == 0 ||
			   strcmp(*argv, "DP") == 0) {
			NEXT_ARG();
			if (get_unsigned(&opt.DP, *argv, 10)) {
				fprintf(stderr, "Illegal \"vq\"\n");
				return -1;
			} else if (opt.DP >= MAX_DPs) {
				fprintf(stderr, "GRED: only %u VQs are currently supported\n",
					MAX_DPs);
				return -1;
			} /* need a better error check */
			ok++;
		} else if (strcmp(*argv, "burst") == 0) {
			NEXT_ARG();
			if (get_unsigned(&burst, *argv, 0)) {
				fprintf(stderr, "Illegal \"burst\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "avpkt") == 0) {
			NEXT_ARG();
			if (get_size(&avpkt, *argv)) {
				fprintf(stderr, "Illegal \"avpkt\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "probability") == 0) {
			NEXT_ARG();
			if (sscanf(*argv, "%lg", &probability) != 1) {
				fprintf(stderr, "Illegal \"probability\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "prio") == 0) {
			NEXT_ARG();
			opt.prio = strtol(*argv, (char **)NULL, 10);
			/* some error check here */
			ok++;
		} else if (strcmp(*argv, "bandwidth") == 0) {
			NEXT_ARG();
			if (get_rate(&rate, *argv)) {
				fprintf(stderr, "Illegal \"bandwidth\"\n");
				return -1;
			}
			ok++;
		} else if (strcmp(*argv, "help") == 0) {
			explain();
			return -1;
		} else {
			fprintf(stderr, "What is \"%s\"?\n", *argv);
			explain();
			return -1;
		}
		argc--; argv++;
	}

	if (!ok) {
		explain();
		return -1;
	}
	if (opt.DP == MAX_DPs || !opt.limit || !opt.qth_min || !opt.qth_max ||
	    !avpkt) {
		fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
		return -1;
	}
	if (!burst) {
		burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
		fprintf(stderr, "GRED: set burst to %u\n", burst);
	}
	if (!rate) {
		get_rate(&rate, "10Mbit");
		fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
	}
	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
		fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
		return -1;
	}
	if (parm >= 10)
		fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
		    burst);
	opt.Wlog = parm;
	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
		fprintf(stderr, "GRED: failed to calculate probability.\n");
		return -1;
	}
	opt.Plog = parm;
	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
	    {
		fprintf(stderr, "GRED: failed to calculate idle damping table.\n");
		return -1;
	}
	opt.Scell_log = parm;

	tail = NLMSG_TAIL(n);
	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
	max_P = probability * pow(2, 32);
	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
	return 0;
}

static int gred_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
	struct rtattr *tb[TCA_GRED_MAX + 1];
	struct tc_gred_sopt *sopt;
	struct tc_gred_qopt *qopt;
	__u32 *max_p = NULL;
	__u32 *limit = NULL;
	unsigned int i;

	SPRINT_BUF(b1);
	SPRINT_BUF(b2);
	SPRINT_BUF(b3);

	if (opt == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);

	if (tb[TCA_GRED_PARMS] == NULL)
		return -1;

	if (tb[TCA_GRED_MAX_P] &&
	    RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
		max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);

	if (tb[TCA_GRED_LIMIT] &&
	    RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
		limit = RTA_DATA(tb[TCA_GRED_LIMIT]);

	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) ||
	    RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(*qopt)*MAX_DPs) {
		fprintf(f, "\n GRED received message smaller than expected\n");
		return -1;
	}

/* Bad hack! should really return a proper message as shown above*/

	fprintf(f, "vqs %u default %u %s",
		sopt->DPs,
		sopt->def_DP,
		sopt->grio ? "grio " : "");

	if (limit)
		fprintf(f, "limit %s ",
			sprint_size(*limit, b1));

	for (i = 0; i < MAX_DPs; i++, qopt++) {
		if (qopt->DP >= MAX_DPs) continue;
		fprintf(f, "\n vq %u prio %hhu limit %s min %s max %s ",
			qopt->DP,
			qopt->prio,
			sprint_size(qopt->limit, b1),
			sprint_size(qopt->qth_min, b2),
			sprint_size(qopt->qth_max, b3));
		if (show_details) {
			fprintf(f, "ewma %u ", qopt->Wlog);
			if (max_p)
				fprintf(f, "probability %lg ", max_p[i] / pow(2, 32));
			else
				fprintf(f, "Plog %u ", qopt->Plog);
			fprintf(f, "Scell_log %u ", qopt->Scell_log);
		}
		if (show_stats) {
			fprintf(f, "\n  Queue size: average %s current %s ",
				sprint_size(qopt->qave, b1),
				sprint_size(qopt->backlog, b2));
			fprintf(f, "\n  Dropped packets: forced %u early %u pdrop %u other %u ",
				qopt->forced,
				qopt->early,
				qopt->pdrop,
				qopt->other);
			fprintf(f, "\n  Total packets: %u (%s) ",
				qopt->packets,
				sprint_size(qopt->bytesin, b1));
		}
	}
	return 0;
}

struct qdisc_util gred_qdisc_util = {
	.id		= "gred",
	.parse_qopt	= gred_parse_opt,
	.print_qopt	= gred_print_opt,
};
Commit	Line	Data
aba5acdf SH	1	/*
	2	* q_gred.c GRED.
	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	*
ae665a52 SH	9	* Authors: J Hadi Salim(hadi@nortelnetworks.com)
	10	* code ruthlessly ripped from
	11	* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
aba5acdf SH	12	*
	13	*/
	14
	15	#include <stdio.h>
	16	#include <stdlib.h>
	17	#include <unistd.h>
	18	#include <syslog.h>
	19	#include <fcntl.h>
	20	#include <sys/socket.h>
	21	#include <netinet/in.h>
	22	#include <arpa/inet.h>
	23	#include <string.h>
1b6f0bb5	24	#include <math.h>
aba5acdf SH	25
	26	#include "utils.h"
	27	#include "tc_util.h"
	28
	29	#include "tc_red.h"
	30
	31
	32	#if 0
32a121cb	33	#define DPRINTF(format, args...) fprintf(stderr, format, ##args)
aba5acdf	34	#else
32a121cb	35	#define DPRINTF(format, args...)
aba5acdf SH	36	#endif
	37
	38	static void explain(void)
	39	{
357c45ad	40	fprintf(stderr, "Usage: tc qdisc { add \| replace \| change } ... gred setup vqs NUMBER\n");
aacee269	41	fprintf(stderr, " default DEFAULT_VQ [ grio ] [ limit BYTES ]\n");
357c45ad DW	42	fprintf(stderr, " tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n");
	43	fprintf(stderr, " min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n");
	44	fprintf(stderr, " [ probability PROBABILITY ] [ bandwidth KBPS ]\n");
aba5acdf SH	45	}
aba5acdf SH	46
3d0b7439	47	static int init_gred(struct qdisc_util qu, int argc, char *argv,
ebde8780	48	struct nlmsghdr *n)
aba5acdf SH	49	{
	50
	51	struct rtattr *tail;
cb4bd0ec	52	struct tc_gred_sopt opt = { 0 };
aacee269	53	__u32 limit = 0;
eb6d7d6a DW	54
eb6d7d6a DW	55	opt.def_DP = MAX_DPs;
aba5acdf SH	56
aba5acdf SH	57	while (argc > 0) {
32a121cb	58	DPRINTF(stderr, "init_gred: invoked with %s\n", *argv);
357c45ad DW	59	if (strcmp(*argv, "vqs") == 0 \|\|
357c45ad DW	60	strcmp(*argv, "DPs") == 0) {
aba5acdf	61	NEXT_ARG();
eb6d7d6a	62	if (get_unsigned(&opt.DPs, *argv, 10)) {
357c45ad	63	fprintf(stderr, "Illegal \"vqs\"\n");
eb6d7d6a DW	64	return -1;
eb6d7d6a DW	65	} else if (opt.DPs > MAX_DPs) {
32a121cb SH	66	fprintf(stderr, "GRED: only %u VQs are currently supported\n",
32a121cb SH	67	MAX_DPs);
aba5acdf SH	68	return -1;
	69	}
	70	} else if (strcmp(*argv, "default") == 0) {
eb6d7d6a	71	if (opt.DPs == 0) {
32a121cb	72	fprintf(stderr, "\"default\" must be defined after \"vqs\"\n");
aba5acdf SH	73	return -1;
aba5acdf SH	74	}
eb6d7d6a DW	75	NEXT_ARG();
	76	if (get_unsigned(&opt.def_DP, *argv, 10)) {
	77	fprintf(stderr, "Illegal \"default\"\n");
	78	return -1;
	79	} else if (opt.def_DP >= opt.DPs) {
32a121cb	80	fprintf(stderr, "\"default\" must be less than \"vqs\"\n");
aba5acdf SH	81	return -1;
	82	}
	83	} else if (strcmp(*argv, "grio") == 0) {
cb4bd0ec	84	opt.grio = 1;
aacee269 DW	85	} else if (strcmp(*argv, "limit") == 0) {
	86	NEXT_ARG();
	87	if (get_size(&limit, *argv)) {
	88	fprintf(stderr, "Illegal \"limit\"\n");
	89	return -1;
	90	}
aba5acdf SH	91	} else if (strcmp(*argv, "help") == 0) {
	92	explain();
	93	return -1;
	94	} else {
	95	fprintf(stderr, "What is \"%s\"?\n", *argv);
	96	explain();
	97	return -1;
	98	}
	99	argc--; argv++;
ebde8780	100	}
aba5acdf	101
eb6d7d6a	102	if (!opt.DPs \|\| opt.def_DP == MAX_DPs) {
32a121cb	103	fprintf(stderr, "Illegal gred setup parameters\n");
ebde8780 SH	104	return -1;
	105	}
	106
32a121cb SH	107	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n", opt.DPs, opt.def_DP);
32a121cb SH	108	n->nlmsg_flags \|= NLM_F_CREATE;
228569c3	109	tail = NLMSG_TAIL(n);
aba5acdf SH	110	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
aba5acdf SH	111	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
aacee269 DW	112	if (limit)
aacee269 DW	113	addattr32(n, 1024, TCA_GRED_LIMIT, limit);
228569c3	114	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
ebde8780	115	return 0;
aba5acdf SH	116	}
	117	/*
	118	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	119	*/
	120	static int gred_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	121	{
32a121cb	122	int ok = 0;
eb6d7d6a	123	struct tc_gred_qopt opt = { 0 };
32a121cb SH	124	unsigned int burst = 0;
32a121cb SH	125	unsigned int avpkt = 0;
aba5acdf	126	double probability = 0.02;
32a121cb	127	unsigned int rate = 0;
9d9a67c7	128	int parm;
aba5acdf SH	129	__u8 sbuf[256];
aba5acdf SH	130	struct rtattr *tail;
1b6f0bb5	131	__u32 max_P;
aba5acdf	132
eb6d7d6a	133	opt.DP = MAX_DPs;
aba5acdf SH	134
	135	while (argc > 0) {
	136	if (strcmp(*argv, "limit") == 0) {
	137	NEXT_ARG();
	138	if (get_size(&opt.limit, *argv)) {
	139	fprintf(stderr, "Illegal \"limit\"\n");
	140	return -1;
	141	}
	142	ok++;
	143	} else if (strcmp(*argv, "setup") == 0) {
	144	if (ok) {
	145	fprintf(stderr, "Illegal \"setup\"\n");
	146	return -1;
	147	}
d73e0408	148	return init_gred(qu, argc-1, argv+1, n);
aba5acdf SH	149	} else if (strcmp(*argv, "min") == 0) {
	150	NEXT_ARG();
	151	if (get_size(&opt.qth_min, *argv)) {
	152	fprintf(stderr, "Illegal \"min\"\n");
	153	return -1;
	154	}
	155	ok++;
	156	} else if (strcmp(*argv, "max") == 0) {
	157	NEXT_ARG();
	158	if (get_size(&opt.qth_max, *argv)) {
	159	fprintf(stderr, "Illegal \"max\"\n");
	160	return -1;
	161	}
	162	ok++;
357c45ad DW	163	} else if (strcmp(*argv, "vq") == 0 \|\|
357c45ad DW	164	strcmp(*argv, "DP") == 0) {
aba5acdf	165	NEXT_ARG();
eb6d7d6a	166	if (get_unsigned(&opt.DP, *argv, 10)) {
357c45ad	167	fprintf(stderr, "Illegal \"vq\"\n");
aba5acdf	168	return -1;
eb6d7d6a	169	} else if (opt.DP >= MAX_DPs) {
32a121cb SH	170	fprintf(stderr, "GRED: only %u VQs are currently supported\n",
32a121cb SH	171	MAX_DPs);
eb6d7d6a DW	172	return -1;
eb6d7d6a DW	173	} /* need a better error check */
aba5acdf SH	174	ok++;
	175	} else if (strcmp(*argv, "burst") == 0) {
	176	NEXT_ARG();
d73e0408	177	if (get_unsigned(&burst, *argv, 0)) {
aba5acdf SH	178	fprintf(stderr, "Illegal \"burst\"\n");
	179	return -1;
	180	}
	181	ok++;
	182	} else if (strcmp(*argv, "avpkt") == 0) {
	183	NEXT_ARG();
	184	if (get_size(&avpkt, *argv)) {
	185	fprintf(stderr, "Illegal \"avpkt\"\n");
	186	return -1;
	187	}
	188	ok++;
	189	} else if (strcmp(*argv, "probability") == 0) {
	190	NEXT_ARG();
	191	if (sscanf(*argv, "%lg", &probability) != 1) {
	192	fprintf(stderr, "Illegal \"probability\"\n");
	193	return -1;
	194	}
	195	ok++;
	196	} else if (strcmp(*argv, "prio") == 0) {
	197	NEXT_ARG();
32a121cb	198	opt.prio = strtol(argv, (char *)NULL, 10);
aba5acdf SH	199	/* some error check here */
	200	ok++;
	201	} else if (strcmp(*argv, "bandwidth") == 0) {
	202	NEXT_ARG();
	203	if (get_rate(&rate, *argv)) {
	204	fprintf(stderr, "Illegal \"bandwidth\"\n");
	205	return -1;
	206	}
	207	ok++;
	208	} else if (strcmp(*argv, "help") == 0) {
	209	explain();
	210	return -1;
	211	} else {
	212	fprintf(stderr, "What is \"%s\"?\n", *argv);
	213	explain();
	214	return -1;
	215	}
	216	argc--; argv++;
	217	}
	218
a77905ef DW	219	if (!ok) {
	220	explain();
	221	return -1;
	222	}
eb6d7d6a DW	223	if (opt.DP == MAX_DPs \|\| !opt.limit \|\| !opt.qth_min \|\| !opt.qth_max \|\|
eb6d7d6a DW	224	!avpkt) {
32a121cb	225	fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
aba5acdf SH	226	return -1;
aba5acdf SH	227	}
ab15aeac ED	228	if (!burst) {
	229	burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
	230	fprintf(stderr, "GRED: set burst to %u\n", burst);
	231	}
d93c909a DW	232	if (!rate) {
	233	get_rate(&rate, "10Mbit");
	234	fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
	235	}
9d9a67c7	236	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
aba5acdf SH	237	fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
	238	return -1;
	239	}
9d9a67c7	240	if (parm >= 10)
32a121cb SH	241	fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
32a121cb SH	242	burst);
9d9a67c7 DW	243	opt.Wlog = parm;
9d9a67c7 DW	244	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
aba5acdf SH	245	fprintf(stderr, "GRED: failed to calculate probability.\n");
	246	return -1;
	247	}
9d9a67c7 DW	248	opt.Plog = parm;
9d9a67c7 DW	249	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
aba5acdf	250	{
32a121cb	251	fprintf(stderr, "GRED: failed to calculate idle damping table.\n");
aba5acdf SH	252	return -1;
aba5acdf SH	253	}
9d9a67c7	254	opt.Scell_log = parm;
aba5acdf	255
228569c3	256	tail = NLMSG_TAIL(n);
aba5acdf SH	257	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	258	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
	259	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
1b6f0bb5 ED	260	max_P = probability * pow(2, 32);
1b6f0bb5 ED	261	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
228569c3	262	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
aba5acdf SH	263	return 0;
	264	}
	265
	266	static int gred_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	267	{
1b6f0bb5	268	struct rtattr *tb[TCA_GRED_MAX + 1];
1693a4d3	269	struct tc_gred_sopt *sopt;
aba5acdf	270	struct tc_gred_qopt *qopt;
1b6f0bb5	271	__u32 *max_p = NULL;
aacee269	272	__u32 *limit = NULL;
32a121cb SH	273	unsigned int i;
32a121cb SH	274
aba5acdf SH	275	SPRINT_BUF(b1);
	276	SPRINT_BUF(b2);
	277	SPRINT_BUF(b3);
aba5acdf SH	278
	279	if (opt == NULL)
	280	return 0;
	281
1b6f0bb5	282	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
aba5acdf SH	283
	284	if (tb[TCA_GRED_PARMS] == NULL)
	285	return -1;
a5a6f1e8	286
1b6f0bb5 ED	287	if (tb[TCA_GRED_MAX_P] &&
	288	RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
	289	max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
	290
aacee269 DW	291	if (tb[TCA_GRED_LIMIT] &&
	292	RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
	293	limit = RTA_DATA(tb[TCA_GRED_LIMIT]);
	294
1693a4d3	295	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
aba5acdf	296	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
1693a4d3 DW	297	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) \|\|
1693a4d3 DW	298	RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(qopt)MAX_DPs) {
32a121cb	299	fprintf(f, "\n GRED received message smaller than expected\n");
aba5acdf	300	return -1;
1693a4d3	301	}
ae665a52	302
aba5acdf SH	303	/* Bad hack! should really return a proper message as shown above*/
aba5acdf SH	304
357c45ad	305	fprintf(f, "vqs %u default %u %s",
1693a4d3 DW	306	sopt->DPs,
	307	sopt->def_DP,
	308	sopt->grio ? "grio " : "");
	309
aacee269 DW	310	if (limit)
	311	fprintf(f, "limit %s ",
	312	sprint_size(*limit, b1));
	313
32a121cb	314	for (i = 0; i < MAX_DPs; i++, qopt++) {
aba5acdf	315	if (qopt->DP >= MAX_DPs) continue;
357c45ad	316	fprintf(f, "\n vq %u prio %hhu limit %s min %s max %s ",
aba5acdf SH	317	qopt->DP,
aba5acdf SH	318	qopt->prio,
1693a4d3 DW	319	sprint_size(qopt->limit, b1),
	320	sprint_size(qopt->qth_min, b2),
	321	sprint_size(qopt->qth_max, b3));
	322	if (show_details) {
	323	fprintf(f, "ewma %u ", qopt->Wlog);
	324	if (max_p)
	325	fprintf(f, "probability %lg ", max_p[i] / pow(2, 32));
	326	else
	327	fprintf(f, "Plog %u ", qopt->Plog);
	328	fprintf(f, "Scell_log %u ", qopt->Scell_log);
	329	}
	330	if (show_stats) {
	331	fprintf(f, "\n Queue size: average %s current %s ",
	332	sprint_size(qopt->qave, b1),
	333	sprint_size(qopt->backlog, b2));
	334	fprintf(f, "\n Dropped packets: forced %u early %u pdrop %u other %u ",
	335	qopt->forced,
	336	qopt->early,
	337	qopt->pdrop,
	338	qopt->other);
	339	fprintf(f, "\n Total packets: %u (%s) ",
	340	qopt->packets,
	341	sprint_size(qopt->bytesin, b1));
	342	}
aba5acdf SH	343	}
	344	return 0;
	345	}
	346
95812b56	347	struct qdisc_util gred_qdisc_util = {
f2f99e2e SH	348	.id = "gred",
	349	.parse_qopt = gred_parse_opt,
	350	.print_qopt = gred_print_opt,
aba5acdf	351	};