[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 "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: ... gred DP drop-probability limit BYTES "
	    "min BYTES max BYTES\n");
	fprintf(stderr, "    avpkt BYTES burst PACKETS probability PROBABILITY "
	    "bandwidth KBPS\n");
	fprintf(stderr, "    [prio value]\n");
	fprintf(stderr," OR ...\n");
	fprintf(stderr," gred setup DPs <num of DPs> default <default DP> "
	    "[grio]\n");
}

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

	struct rtattr *tail;
	struct tc_gred_sopt opt;
	int dps = 0;
	int def_dp = -1;

	while (argc > 0) {
		DPRINTF(stderr,"init_gred: invoked with %s\n",*argv);
		if (strcmp(*argv, "DPs") == 0) {
			NEXT_ARG();
			DPRINTF(stderr,"init_gred: next_arg with %s\n",*argv);
			dps = strtol(*argv, (char **)NULL, 10);
			if (dps < 0 || dps >MAX_DPs) {
				fprintf(stderr, "DPs =%d\n", dps);
				fprintf(stderr, "Illegal \"DPs\"\n");
				fprintf(stderr, "GRED: only %d DPs are "
					"currently supported\n",MAX_DPs);
				return -1;
			}
		} else if (strcmp(*argv, "default") == 0) {
			NEXT_ARG();
			def_dp = strtol(*argv, (char **)NULL, 10);
			if (dps == 0) {
				fprintf(stderr, "\"default DP\" must be "
					"defined after DPs\n");
				return -1;
			}
			if (def_dp < 0 || def_dp > dps) {
				fprintf(stderr, 
					"\"default DP\" must be less than %d\n",
					opt.DPs);
				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 (!dps || def_dp == -1) {
		fprintf(stderr, "Illegal gred setup parameters \n");
		return -1;
	}

	memset(&opt, 0, sizeof(struct tc_gred_sopt));
	opt.DPs = dps;
	opt.def_DP = def_dp;

	DPRINTF("TC_GRED: sending DPs=%d default=%d\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;
	unsigned burst = 0;
	unsigned avpkt = 0;
	double probability = 0.02;
	unsigned rate = 0;
	int wlog;
	__u8 sbuf[256];
	struct rtattr *tail;

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

	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, "DP") == 0) {
			NEXT_ARG();
			opt.DP=strtol(*argv, (char **)NULL, 10);
			DPRINTF ("\n ******* DP =%u\n",opt.DP);
			if (opt.DP >MAX_DPs) { /* need a better error check */
				fprintf(stderr, "DP =%u \n",opt.DP);
				fprintf(stderr, "Illegal \"DP\"\n");
				fprintf(stderr, "GRED: only %d DPs are currently supported\n",MAX_DPs);
				return -1;
			}
			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 (rate == 0)
		get_rate(&rate, "10Mbit");

	if (!opt.qth_min || !opt.qth_max || !burst || !opt.limit || !avpkt ||
	    (opt.DP<0)) {
		fprintf(stderr, "Required parameter (min, max, burst, limit, "
		    "avpkt, DP) is missing\n");
		return -1;
	}

	if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
		fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
		return -1;
	}
	if (wlog >= 10)
		fprintf(stderr, "GRED: WARNING. Burst %d seems to be to "
		    "large.\n", burst);
	opt.Wlog = wlog;
	if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
		fprintf(stderr, "GRED: failed to calculate probability.\n");
		return -1;
	}
	opt.Plog = wlog;
	if ((wlog = 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 = wlog;

	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);
	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_STAB+1];
	struct tc_gred_qopt *qopt;
	int i;
	SPRINT_BUF(b1);
	SPRINT_BUF(b2);
	SPRINT_BUF(b3);
	SPRINT_BUF(b4);
	SPRINT_BUF(b5);

	if (opt == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_GRED_STAB, opt);

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

	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
	if (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*/

	for (i=0;i<MAX_DPs;i++, qopt++) {
		if (qopt->DP >= MAX_DPs) continue;
		fprintf(f, "\n DP:%d (prio %d) Average Queue %s Measured "
		    "Queue %s  ",
			qopt->DP,
			qopt->prio,
			sprint_size(qopt->qave, b4),
			sprint_size(qopt->backlog, b5));
		fprintf(f, "\n\t Packet drops: %d (forced %d early %d)  ",
			qopt->forced+qopt->early,
			qopt->forced,
			qopt->early);
		fprintf(f, "\n\t Packet totals: %u (bytes %u)  ",
			qopt->packets,
			qopt->bytesin);
		if (show_details)
			fprintf(f, "\n limit %s min %s max %s ",
				sprint_size(qopt->limit, b1),
				sprint_size(qopt->qth_min, b2),
				sprint_size(qopt->qth_max, b3));
				fprintf(f, "ewma %u Plog %u Scell_log %u",
				    qopt->Wlog, qopt->Plog, qopt->Scell_log);
	}
	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>
	24
	25	#include "utils.h"
	26	#include "tc_util.h"
	27
	28	#include "tc_red.h"
	29
	30
	31	#if 0
	32	#define DPRINTF(format,args...) fprintf(stderr,format,##args)
	33	#else
	34	#define DPRINTF(format,args...)
	35	#endif
	36
	37	static void explain(void)
	38	{
	39	fprintf(stderr, "Usage: ... gred DP drop-probability limit BYTES "
	40	"min BYTES max BYTES\n");
	41	fprintf(stderr, " avpkt BYTES burst PACKETS probability PROBABILITY "
	42	"bandwidth KBPS\n");
	43	fprintf(stderr, " [prio value]\n");
	44	fprintf(stderr," OR ...\n");
	45	fprintf(stderr," gred setup DPs <num of DPs> default <default DP> "
	46	"[grio]\n");
	47	}
	48
ebde8780 SH	49	static int init_gred(struct qdisc_util qu, int argc, char *argv,
ebde8780 SH	50	struct nlmsghdr *n)
aba5acdf SH	51	{
	52
	53	struct rtattr *tail;
	54	struct tc_gred_sopt opt;
ebde8780 SH	55	int dps = 0;
ebde8780 SH	56	int def_dp = -1;
aba5acdf SH	57
	58	while (argc > 0) {
	59	DPRINTF(stderr,"init_gred: invoked with %s\n",*argv);
	60	if (strcmp(*argv, "DPs") == 0) {
	61	NEXT_ARG();
	62	DPRINTF(stderr,"init_gred: next_arg with %s\n",*argv);
ebde8780 SH	63	dps = strtol(argv, (char *)NULL, 10);
	64	if (dps < 0 \|\| dps >MAX_DPs) {
	65	fprintf(stderr, "DPs =%d\n", dps);
aba5acdf SH	66	fprintf(stderr, "Illegal \"DPs\"\n");
aba5acdf SH	67	fprintf(stderr, "GRED: only %d DPs are "
ebde8780	68	"currently supported\n",MAX_DPs);
aba5acdf SH	69	return -1;
	70	}
	71	} else if (strcmp(*argv, "default") == 0) {
	72	NEXT_ARG();
ebde8780	73	def_dp = strtol(argv, (char *)NULL, 10);
1558971d	74	if (dps == 0) {
aba5acdf	75	fprintf(stderr, "\"default DP\" must be "
ebde8780	76	"defined after DPs\n");
aba5acdf SH	77	return -1;
aba5acdf SH	78	}
ebde8780 SH	79	if (def_dp < 0 \|\| def_dp > dps) {
	80	fprintf(stderr,
	81	"\"default DP\" must be less than %d\n",
	82	opt.DPs);
aba5acdf SH	83	return -1;
	84	}
	85	} else if (strcmp(*argv, "grio") == 0) {
	86	opt.grio=1;
	87	} else if (strcmp(*argv, "help") == 0) {
	88	explain();
	89	return -1;
	90	} else {
	91	fprintf(stderr, "What is \"%s\"?\n", *argv);
	92	explain();
	93	return -1;
	94	}
	95	argc--; argv++;
ebde8780	96	}
aba5acdf	97
ebde8780 SH	98	if (!dps \|\| def_dp == -1) {
	99	fprintf(stderr, "Illegal gred setup parameters \n");
	100	return -1;
	101	}
	102
	103	memset(&opt, 0, sizeof(struct tc_gred_sopt));
	104	opt.DPs = dps;
	105	opt.def_DP = def_dp;
	106
	107	DPRINTF("TC_GRED: sending DPs=%d default=%d\n",opt.DPs,opt.def_DP);
aba5acdf	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));
228569c3	112	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
ebde8780	113	return 0;
aba5acdf SH	114	}
	115	/*
	116	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	117	*/
	118	static int gred_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	119	{
	120	int ok=0;
	121	struct tc_gred_qopt opt;
	122	unsigned burst = 0;
	123	unsigned avpkt = 0;
	124	double probability = 0.02;
	125	unsigned rate = 0;
	126	int wlog;
	127	__u8 sbuf[256];
	128	struct rtattr *tail;
	129
	130	memset(&opt, 0, sizeof(opt));
	131
	132	while (argc > 0) {
	133	if (strcmp(*argv, "limit") == 0) {
	134	NEXT_ARG();
	135	if (get_size(&opt.limit, *argv)) {
	136	fprintf(stderr, "Illegal \"limit\"\n");
	137	return -1;
	138	}
	139	ok++;
	140	} else if (strcmp(*argv, "setup") == 0) {
	141	if (ok) {
	142	fprintf(stderr, "Illegal \"setup\"\n");
	143	return -1;
	144	}
	145	return init_gred(qu,argc-1, argv+1,n);
ae665a52	146
aba5acdf SH	147	} else if (strcmp(*argv, "min") == 0) {
	148	NEXT_ARG();
	149	if (get_size(&opt.qth_min, *argv)) {
	150	fprintf(stderr, "Illegal \"min\"\n");
	151	return -1;
	152	}
	153	ok++;
	154	} else if (strcmp(*argv, "max") == 0) {
	155	NEXT_ARG();
	156	if (get_size(&opt.qth_max, *argv)) {
	157	fprintf(stderr, "Illegal \"max\"\n");
	158	return -1;
	159	}
	160	ok++;
	161	} else if (strcmp(*argv, "DP") == 0) {
	162	NEXT_ARG();
	163	opt.DP=strtol(argv, (char *)NULL, 10);
	164	DPRINTF ("\n ******* DP =%u\n",opt.DP);
	165	if (opt.DP >MAX_DPs) { /* need a better error check */
	166	fprintf(stderr, "DP =%u \n",opt.DP);
	167	fprintf(stderr, "Illegal \"DP\"\n");
	168	fprintf(stderr, "GRED: only %d DPs are currently supported\n",MAX_DPs);
	169	return -1;
	170	}
aba5acdf SH	171	ok++;
	172	} else if (strcmp(*argv, "burst") == 0) {
	173	NEXT_ARG();
	174	if (get_unsigned(&burst, *argv, 0)) {
	175	fprintf(stderr, "Illegal \"burst\"\n");
	176	return -1;
	177	}
	178	ok++;
	179	} else if (strcmp(*argv, "avpkt") == 0) {
	180	NEXT_ARG();
	181	if (get_size(&avpkt, *argv)) {
	182	fprintf(stderr, "Illegal \"avpkt\"\n");
	183	return -1;
	184	}
	185	ok++;
	186	} else if (strcmp(*argv, "probability") == 0) {
	187	NEXT_ARG();
	188	if (sscanf(*argv, "%lg", &probability) != 1) {
	189	fprintf(stderr, "Illegal \"probability\"\n");
	190	return -1;
	191	}
	192	ok++;
	193	} else if (strcmp(*argv, "prio") == 0) {
	194	NEXT_ARG();
	195	opt.prio=strtol(argv, (char *)NULL, 10);
	196	/* some error check here */
	197	ok++;
	198	} else if (strcmp(*argv, "bandwidth") == 0) {
	199	NEXT_ARG();
	200	if (get_rate(&rate, *argv)) {
	201	fprintf(stderr, "Illegal \"bandwidth\"\n");
	202	return -1;
	203	}
	204	ok++;
	205	} else if (strcmp(*argv, "help") == 0) {
	206	explain();
	207	return -1;
	208	} else {
	209	fprintf(stderr, "What is \"%s\"?\n", *argv);
	210	explain();
	211	return -1;
	212	}
	213	argc--; argv++;
	214	}
	215
aba5acdf SH	216	if (rate == 0)
	217	get_rate(&rate, "10Mbit");
	218
	219	if (!opt.qth_min \|\| !opt.qth_max \|\| !burst \|\| !opt.limit \|\| !avpkt \|\|
	220	(opt.DP<0)) {
	221	fprintf(stderr, "Required parameter (min, max, burst, limit, "
ddf216c8	222	"avpkt, DP) is missing\n");
aba5acdf SH	223	return -1;
	224	}
	225
	226	if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
	227	fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
	228	return -1;
	229	}
	230	if (wlog >= 10)
	231	fprintf(stderr, "GRED: WARNING. Burst %d seems to be to "
	232	"large.\n", burst);
	233	opt.Wlog = wlog;
	234	if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
	235	fprintf(stderr, "GRED: failed to calculate probability.\n");
	236	return -1;
	237	}
	238	opt.Plog = wlog;
	239	if ((wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
	240	{
	241	fprintf(stderr, "GRED: failed to calculate idle damping "
	242	"table.\n");
	243	return -1;
	244	}
	245	opt.Scell_log = wlog;
	246
228569c3	247	tail = NLMSG_TAIL(n);
aba5acdf SH	248	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	249	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
	250	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
228569c3	251	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
aba5acdf SH	252	return 0;
	253	}
	254
	255	static int gred_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	256	{
	257	struct rtattr *tb[TCA_GRED_STAB+1];
	258	struct tc_gred_qopt *qopt;
	259	int i;
	260	SPRINT_BUF(b1);
	261	SPRINT_BUF(b2);
	262	SPRINT_BUF(b3);
	263	SPRINT_BUF(b4);
	264	SPRINT_BUF(b5);
	265
	266	if (opt == NULL)
	267	return 0;
	268
3b3ecd31	269	parse_rtattr_nested(tb, TCA_GRED_STAB, opt);
aba5acdf SH	270
	271	if (tb[TCA_GRED_PARMS] == NULL)
	272	return -1;
a5a6f1e8	273
aba5acdf SH	274	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
	275	if (RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(qopt)MAX_DPs) {
	276	fprintf(f,"\n GRED received message smaller than expected\n");
	277	return -1;
	278	}
ae665a52	279
aba5acdf SH	280	/* Bad hack! should really return a proper message as shown above*/
	281
	282	for (i=0;i<MAX_DPs;i++, qopt++) {
	283	if (qopt->DP >= MAX_DPs) continue;
	284	fprintf(f, "\n DP:%d (prio %d) Average Queue %s Measured "
	285	"Queue %s ",
	286	qopt->DP,
	287	qopt->prio,
	288	sprint_size(qopt->qave, b4),
	289	sprint_size(qopt->backlog, b5));
	290	fprintf(f, "\n\t Packet drops: %d (forced %d early %d) ",
	291	qopt->forced+qopt->early,
	292	qopt->forced,
	293	qopt->early);
	294	fprintf(f, "\n\t Packet totals: %u (bytes %u) ",
	295	qopt->packets,
	296	qopt->bytesin);
	297	if (show_details)
	298	fprintf(f, "\n limit %s min %s max %s ",
	299	sprint_size(qopt->limit, b1),
	300	sprint_size(qopt->qth_min, b2),
	301	sprint_size(qopt->qth_max, b3));
	302	fprintf(f, "ewma %u Plog %u Scell_log %u",
	303	qopt->Wlog, qopt->Plog, qopt->Scell_log);
	304	}
	305	return 0;
	306	}
	307
95812b56	308	struct qdisc_util gred_qdisc_util = {
f2f99e2e SH	309	.id = "gred",
	310	.parse_qopt = gred_parse_opt,
	311	.print_qopt = gred_print_opt,
aba5acdf	312	};