[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 ]\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 };

	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, "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));
	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 burst = 0;
	unsigned avpkt = 0;
	double probability = 0.02;
	unsigned 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;
	unsigned 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]);

	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 " : "");

	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
	33	#define DPRINTF(format,args...) fprintf(stderr,format,##args)
	34	#else
	35	#define DPRINTF(format,args...)
	36	#endif
	37
	38	static void explain(void)
	39	{
357c45ad DW	40	fprintf(stderr, "Usage: tc qdisc { add \| replace \| change } ... gred setup vqs NUMBER\n");
	41	fprintf(stderr, " default DEFAULT_VQ [ grio ]\n");
	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 };
eb6d7d6a DW	53
eb6d7d6a DW	54	opt.def_DP = MAX_DPs;
aba5acdf SH	55
	56	while (argc > 0) {
	57	DPRINTF(stderr,"init_gred: invoked with %s\n",*argv);
357c45ad DW	58	if (strcmp(*argv, "vqs") == 0 \|\|
357c45ad DW	59	strcmp(*argv, "DPs") == 0) {
aba5acdf	60	NEXT_ARG();
eb6d7d6a	61	if (get_unsigned(&opt.DPs, *argv, 10)) {
357c45ad	62	fprintf(stderr, "Illegal \"vqs\"\n");
eb6d7d6a DW	63	return -1;
eb6d7d6a DW	64	} else if (opt.DPs > MAX_DPs) {
357c45ad	65	fprintf(stderr, "GRED: only %u VQs are "
eb6d7d6a	66	"currently supported\n", MAX_DPs);
aba5acdf SH	67	return -1;
	68	}
	69	} else if (strcmp(*argv, "default") == 0) {
eb6d7d6a DW	70	if (opt.DPs == 0) {
eb6d7d6a DW	71	fprintf(stderr, "\"default\" must be defined "
357c45ad	72	"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) {
	80	fprintf(stderr, "\"default\" must be less than "
357c45ad	81	"\"vqs\"\n");
aba5acdf SH	82	return -1;
	83	}
	84	} else if (strcmp(*argv, "grio") == 0) {
cb4bd0ec	85	opt.grio = 1;
aba5acdf SH	86	} else if (strcmp(*argv, "help") == 0) {
	87	explain();
	88	return -1;
	89	} else {
	90	fprintf(stderr, "What is \"%s\"?\n", *argv);
	91	explain();
	92	return -1;
	93	}
	94	argc--; argv++;
ebde8780	95	}
aba5acdf	96
eb6d7d6a	97	if (!opt.DPs \|\| opt.def_DP == MAX_DPs) {
ebde8780 SH	98	fprintf(stderr, "Illegal gred setup parameters \n");
	99	return -1;
	100	}
	101
eb6d7d6a	102	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n",opt.DPs,opt.def_DP);
aba5acdf	103	n->nlmsg_flags\|=NLM_F_CREATE;
228569c3	104	tail = NLMSG_TAIL(n);
aba5acdf SH	105	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
aba5acdf SH	106	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
228569c3	107	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
ebde8780	108	return 0;
aba5acdf SH	109	}
	110	/*
	111	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	112	*/
	113	static int gred_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	114	{
	115	int ok=0;
eb6d7d6a	116	struct tc_gred_qopt opt = { 0 };
aba5acdf SH	117	unsigned burst = 0;
	118	unsigned avpkt = 0;
	119	double probability = 0.02;
	120	unsigned rate = 0;
9d9a67c7	121	int parm;
aba5acdf SH	122	__u8 sbuf[256];
aba5acdf SH	123	struct rtattr *tail;
1b6f0bb5	124	__u32 max_P;
aba5acdf	125
eb6d7d6a	126	opt.DP = MAX_DPs;
aba5acdf SH	127
	128	while (argc > 0) {
	129	if (strcmp(*argv, "limit") == 0) {
	130	NEXT_ARG();
	131	if (get_size(&opt.limit, *argv)) {
	132	fprintf(stderr, "Illegal \"limit\"\n");
	133	return -1;
	134	}
	135	ok++;
	136	} else if (strcmp(*argv, "setup") == 0) {
	137	if (ok) {
	138	fprintf(stderr, "Illegal \"setup\"\n");
	139	return -1;
	140	}
d73e0408	141	return init_gred(qu, argc-1, argv+1, n);
aba5acdf SH	142	} else if (strcmp(*argv, "min") == 0) {
	143	NEXT_ARG();
	144	if (get_size(&opt.qth_min, *argv)) {
	145	fprintf(stderr, "Illegal \"min\"\n");
	146	return -1;
	147	}
	148	ok++;
	149	} else if (strcmp(*argv, "max") == 0) {
	150	NEXT_ARG();
	151	if (get_size(&opt.qth_max, *argv)) {
	152	fprintf(stderr, "Illegal \"max\"\n");
	153	return -1;
	154	}
	155	ok++;
357c45ad DW	156	} else if (strcmp(*argv, "vq") == 0 \|\|
357c45ad DW	157	strcmp(*argv, "DP") == 0) {
aba5acdf	158	NEXT_ARG();
eb6d7d6a	159	if (get_unsigned(&opt.DP, *argv, 10)) {
357c45ad	160	fprintf(stderr, "Illegal \"vq\"\n");
aba5acdf	161	return -1;
eb6d7d6a	162	} else if (opt.DP >= MAX_DPs) {
357c45ad	163	fprintf(stderr, "GRED: only %u VQs are "
eb6d7d6a DW	164	"currently supported\n", MAX_DPs);
	165	return -1;
	166	} /* need a better error check */
aba5acdf SH	167	ok++;
	168	} else if (strcmp(*argv, "burst") == 0) {
	169	NEXT_ARG();
d73e0408	170	if (get_unsigned(&burst, *argv, 0)) {
aba5acdf SH	171	fprintf(stderr, "Illegal \"burst\"\n");
	172	return -1;
	173	}
	174	ok++;
	175	} else if (strcmp(*argv, "avpkt") == 0) {
	176	NEXT_ARG();
	177	if (get_size(&avpkt, *argv)) {
	178	fprintf(stderr, "Illegal \"avpkt\"\n");
	179	return -1;
	180	}
	181	ok++;
	182	} else if (strcmp(*argv, "probability") == 0) {
	183	NEXT_ARG();
	184	if (sscanf(*argv, "%lg", &probability) != 1) {
	185	fprintf(stderr, "Illegal \"probability\"\n");
	186	return -1;
	187	}
	188	ok++;
	189	} else if (strcmp(*argv, "prio") == 0) {
	190	NEXT_ARG();
	191	opt.prio=strtol(argv, (char *)NULL, 10);
	192	/* some error check here */
	193	ok++;
	194	} else if (strcmp(*argv, "bandwidth") == 0) {
	195	NEXT_ARG();
	196	if (get_rate(&rate, *argv)) {
	197	fprintf(stderr, "Illegal \"bandwidth\"\n");
	198	return -1;
	199	}
	200	ok++;
	201	} else if (strcmp(*argv, "help") == 0) {
	202	explain();
	203	return -1;
	204	} else {
	205	fprintf(stderr, "What is \"%s\"?\n", *argv);
	206	explain();
	207	return -1;
	208	}
	209	argc--; argv++;
	210	}
	211
a77905ef DW	212	if (!ok) {
	213	explain();
	214	return -1;
	215	}
eb6d7d6a DW	216	if (opt.DP == MAX_DPs \|\| !opt.limit \|\| !opt.qth_min \|\| !opt.qth_max \|\|
eb6d7d6a DW	217	!avpkt) {
357c45ad	218	fprintf(stderr, "Required parameter (vq, limit, min, max, "
eb6d7d6a	219	"avpkt) is missing\n");
aba5acdf SH	220	return -1;
aba5acdf SH	221	}
ab15aeac ED	222	if (!burst) {
	223	burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
	224	fprintf(stderr, "GRED: set burst to %u\n", burst);
	225	}
d93c909a DW	226	if (!rate) {
	227	get_rate(&rate, "10Mbit");
	228	fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
	229	}
9d9a67c7	230	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
aba5acdf SH	231	fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
	232	return -1;
	233	}
9d9a67c7	234	if (parm >= 10)
6c99695d	235	fprintf(stderr, "GRED: WARNING. Burst %u seems to be too "
aba5acdf	236	"large.\n", burst);
9d9a67c7 DW	237	opt.Wlog = parm;
9d9a67c7 DW	238	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
aba5acdf SH	239	fprintf(stderr, "GRED: failed to calculate probability.\n");
	240	return -1;
	241	}
9d9a67c7 DW	242	opt.Plog = parm;
9d9a67c7 DW	243	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
aba5acdf SH	244	{
	245	fprintf(stderr, "GRED: failed to calculate idle damping "
	246	"table.\n");
	247	return -1;
	248	}
9d9a67c7	249	opt.Scell_log = parm;
aba5acdf	250
228569c3	251	tail = NLMSG_TAIL(n);
aba5acdf SH	252	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	253	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
	254	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
1b6f0bb5 ED	255	max_P = probability * pow(2, 32);
1b6f0bb5 ED	256	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
228569c3	257	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
aba5acdf SH	258	return 0;
	259	}
	260
	261	static int gred_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	262	{
1b6f0bb5	263	struct rtattr *tb[TCA_GRED_MAX + 1];
1693a4d3	264	struct tc_gred_sopt *sopt;
aba5acdf	265	struct tc_gred_qopt *qopt;
1b6f0bb5	266	__u32 *max_p = NULL;
1693a4d3	267	unsigned i;
aba5acdf SH	268	SPRINT_BUF(b1);
	269	SPRINT_BUF(b2);
	270	SPRINT_BUF(b3);
aba5acdf SH	271
	272	if (opt == NULL)
	273	return 0;
	274
1b6f0bb5	275	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
aba5acdf SH	276
	277	if (tb[TCA_GRED_PARMS] == NULL)
	278	return -1;
a5a6f1e8	279
1b6f0bb5 ED	280	if (tb[TCA_GRED_MAX_P] &&
	281	RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
	282	max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
	283
1693a4d3	284	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
aba5acdf	285	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
1693a4d3 DW	286	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) \|\|
1693a4d3 DW	287	RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(qopt)MAX_DPs) {
aba5acdf SH	288	fprintf(f,"\n GRED received message smaller than expected\n");
aba5acdf SH	289	return -1;
1693a4d3	290	}
ae665a52	291
aba5acdf SH	292	/* Bad hack! should really return a proper message as shown above*/
aba5acdf SH	293
357c45ad	294	fprintf(f, "vqs %u default %u %s",
1693a4d3 DW	295	sopt->DPs,
	296	sopt->def_DP,
	297	sopt->grio ? "grio " : "");
	298
aba5acdf SH	299	for (i=0;i<MAX_DPs;i++, qopt++) {
aba5acdf SH	300	if (qopt->DP >= MAX_DPs) continue;
357c45ad	301	fprintf(f, "\n vq %u prio %hhu limit %s min %s max %s ",
aba5acdf SH	302	qopt->DP,
aba5acdf SH	303	qopt->prio,
1693a4d3 DW	304	sprint_size(qopt->limit, b1),
	305	sprint_size(qopt->qth_min, b2),
	306	sprint_size(qopt->qth_max, b3));
	307	if (show_details) {
	308	fprintf(f, "ewma %u ", qopt->Wlog);
	309	if (max_p)
	310	fprintf(f, "probability %lg ", max_p[i] / pow(2, 32));
	311	else
	312	fprintf(f, "Plog %u ", qopt->Plog);
	313	fprintf(f, "Scell_log %u ", qopt->Scell_log);
	314	}
	315	if (show_stats) {
	316	fprintf(f, "\n Queue size: average %s current %s ",
	317	sprint_size(qopt->qave, b1),
	318	sprint_size(qopt->backlog, b2));
	319	fprintf(f, "\n Dropped packets: forced %u early %u pdrop %u other %u ",
	320	qopt->forced,
	321	qopt->early,
	322	qopt->pdrop,
	323	qopt->other);
	324	fprintf(f, "\n Total packets: %u (%s) ",
	325	qopt->packets,
	326	sprint_size(qopt->bytesin, b1));
	327	}
aba5acdf SH	328	}
	329	return 0;
	330	}
	331
95812b56	332	struct qdisc_util gred_qdisc_util = {
f2f99e2e SH	333	.id = "gred",
	334	.parse_qopt = gred_parse_opt,
	335	.print_qopt = gred_print_opt,
aba5acdf	336	};