[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 <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 = addattr_nest(n, 1024, TCA_OPTIONS);
	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
	if (limit)
		addattr32(n, 1024, TCA_GRED_LIMIT, limit);
	addattr_nest_end(n, tail);
	return 0;
}
/*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*/
static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
{
	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 (strchr(*argv, '%')) {
				if (get_percent_rate(&rate, *argv, dev)) {
					fprintf(stderr, "Illegal \"bandwidth\"\n");
					return -1;
				}
			} else 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 = addattr_nest(n, 1024, TCA_OPTIONS);
	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);
	addattr_nest_end(n, tail);
	return 0;
}

struct tc_gred_info {
	__u64	bytes;
	__u32	packets;
	__u32	backlog;
	__u32	prob_drop;
	__u32	prob_mark;
	__u32	forced_drop;
	__u32	forced_mark;
	__u32	pdrop;
	__u32	other;
};

static void
gred_parse_vqs(struct tc_gred_info *info, struct rtattr *vqs)
{
	int rem = RTA_PAYLOAD(vqs);
	unsigned int offset = 0;

	while (rem > offset) {
		struct rtattr *tb_entry[TCA_GRED_VQ_ENTRY_MAX + 1] = {};
		struct rtattr *tb[TCA_GRED_VQ_MAX + 1] = {};
		struct rtattr *entry;
		unsigned int len;
		unsigned int dp;

		entry = RTA_DATA(vqs) + offset;

		parse_rtattr(tb_entry, TCA_GRED_VQ_ENTRY_MAX, entry,
			     rem - offset);
		len = RTA_LENGTH(RTA_PAYLOAD(entry));
		offset += len;

		if (!tb_entry[TCA_GRED_VQ_ENTRY]) {
			fprintf(stderr,
				"ERROR: Failed to parse Virtual Queue entry\n");
			continue;
		}

		parse_rtattr_nested(tb, TCA_GRED_VQ_MAX,
				    tb_entry[TCA_GRED_VQ_ENTRY]);

		if (!tb[TCA_GRED_VQ_DP]) {
			fprintf(stderr,
				"ERROR: Virtual Queue without DP attribute\n");
			continue;
		}

		dp = rta_getattr_u32(tb[TCA_GRED_VQ_DP]);

		if (tb[TCA_GRED_VQ_STAT_BYTES])
			info[dp].bytes =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BYTES]);
		if (tb[TCA_GRED_VQ_STAT_PACKETS])
			info[dp].packets =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PACKETS]);
		if (tb[TCA_GRED_VQ_STAT_BACKLOG])
			info[dp].backlog =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BACKLOG]);
		if (tb[TCA_GRED_VQ_STAT_PROB_DROP])
			info[dp].prob_drop =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_DROP]);
		if (tb[TCA_GRED_VQ_STAT_PROB_MARK])
			info[dp].prob_mark =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_MARK]);
		if (tb[TCA_GRED_VQ_STAT_FORCED_DROP])
			info[dp].forced_drop =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_DROP]);
		if (tb[TCA_GRED_VQ_STAT_FORCED_MARK])
			info[dp].forced_mark =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_MARK]);
		if (tb[TCA_GRED_VQ_STAT_PDROP])
			info[dp].pdrop =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PDROP]);
		if (tb[TCA_GRED_VQ_STAT_OTHER])
			info[dp].other =
				rta_getattr_u32(tb[TCA_GRED_VQ_STAT_OTHER]);
	}
}

static void
gred_print_stats(struct tc_gred_info *info, struct tc_gred_qopt *qopt)
{
	__u64 bytes = info ? info->bytes : qopt->bytesin;

	SPRINT_BUF(b1);

	if (!is_json_context())
		printf("\n  Queue size: ");

	print_uint(PRINT_JSON, "qave", NULL, qopt->qave);
	print_string(PRINT_FP, NULL, "average %s ",
		     sprint_size(qopt->qave, b1));

	print_uint(PRINT_JSON, "backlog", NULL, qopt->backlog);
	print_string(PRINT_FP, NULL, "current %s ",
		     sprint_size(qopt->backlog, b1));

	if (!is_json_context())
		printf("\n  Dropped packets: ");

	if (info) {
		print_uint(PRINT_ANY, "forced_drop", "forced %u ",
			   info->forced_drop);
		print_uint(PRINT_ANY, "prob_drop", "early %u ",
			   info->prob_drop);
		print_uint(PRINT_ANY, "pdrop", "pdrop %u ", info->pdrop);
		print_uint(PRINT_ANY, "other", "other %u ", info->other);

		if (!is_json_context())
			printf("\n  Marked packets: ");
		print_uint(PRINT_ANY, "forced_mark", "forced %u ",
			   info->forced_mark);
		print_uint(PRINT_ANY, "prob_mark", "early %u ",
			   info->prob_mark);
	} else {
		print_uint(PRINT_ANY, "forced_drop", "forced %u ",
			   qopt->forced);
		print_uint(PRINT_ANY, "prob_drop", "early %u ", qopt->early);
		print_uint(PRINT_ANY, "pdrop", "pdrop %u ", qopt->pdrop);
		print_uint(PRINT_ANY, "other", "other %u ", qopt->other);
	}

	if (!is_json_context())
		printf("\n  Total packets: ");

	print_uint(PRINT_ANY, "packets", "%u ", qopt->packets);

	print_uint(PRINT_JSON, "bytes", NULL, bytes);
	print_string(PRINT_FP, NULL, "(%s) ", sprint_size(bytes, b1));
}

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

	SPRINT_BUF(b1);

	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;
	}

	if (tb[TCA_GRED_VQ_LIST] && show_stats) {
		gred_parse_vqs(infos, tb[TCA_GRED_VQ_LIST]);
		vq_info = true;
	}

	print_uint(PRINT_ANY, "dp_cnt", "vqs %u ", sopt->DPs);
	print_uint(PRINT_ANY, "dp_default", "default %u ", sopt->def_DP);

	if (sopt->grio)
		print_bool(PRINT_ANY, "grio", "grio ", true);
	else
		print_bool(PRINT_ANY, "grio", NULL, false);

	if (limit) {
		print_uint(PRINT_JSON, "limit", NULL, *limit);
		print_string(PRINT_FP, NULL, "limit %s ",
			     sprint_size(*limit, b1));
	}

	open_json_array(PRINT_JSON, "vqs");
	for (i = 0; i < MAX_DPs; i++, qopt++) {
		if (qopt->DP >= MAX_DPs)
			continue;

		open_json_object(NULL);

		print_uint(PRINT_ANY, "vq", "\n vq %u ", qopt->DP);
		print_hhu(PRINT_ANY, "prio", "prio %hhu ", qopt->prio);

		print_uint(PRINT_JSON, "limit", NULL, qopt->limit);
		print_string(PRINT_FP, NULL, "limit %s ",
			     sprint_size(qopt->limit, b1));

		print_uint(PRINT_JSON, "min", NULL, qopt->qth_min);
		print_string(PRINT_FP, NULL, "min %s ",
			     sprint_size(qopt->qth_min, b1));

		print_uint(PRINT_JSON, "max", NULL, qopt->qth_max);
		print_string(PRINT_FP, NULL, "max %s ",
			     sprint_size(qopt->qth_max, b1));

		if (show_details) {
			print_uint(PRINT_ANY, "ewma", "ewma %u ", qopt->Wlog);
			if (max_p)
				print_float(PRINT_ANY, "probability",
					    "probability %lg ",
					    max_p[i] / pow(2, 32));
			else
				print_uint(PRINT_ANY, "Plog", "Plog %u ",
					   qopt->Plog);
			print_uint(PRINT_ANY, "Scell_log", "Scell_log %u ",
				   qopt->Scell_log);
		}
		if (show_stats)
			gred_print_stats(vq_info ? &infos[i] : NULL, qopt);
		close_json_object();
	}
	close_json_array(PRINT_JSON, "vqs");
	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>
aba5acdf SH	18	#include <fcntl.h>
	19	#include <sys/socket.h>
	20	#include <netinet/in.h>
	21	#include <arpa/inet.h>
	22	#include <string.h>
1b6f0bb5	23	#include <math.h>
aba5acdf SH	24
	25	#include "utils.h"
	26	#include "tc_util.h"
	27
	28	#include "tc_red.h"
	29
	30
	31	#if 0
32a121cb	32	#define DPRINTF(format, args...) fprintf(stderr, format, ##args)
aba5acdf	33	#else
32a121cb	34	#define DPRINTF(format, args...)
aba5acdf SH	35	#endif
	36
	37	static void explain(void)
	38	{
357c45ad	39	fprintf(stderr, "Usage: tc qdisc { add \| replace \| change } ... gred setup vqs NUMBER\n");
aacee269	40	fprintf(stderr, " default DEFAULT_VQ [ grio ] [ limit BYTES ]\n");
357c45ad DW	41	fprintf(stderr, " tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n");
	42	fprintf(stderr, " min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n");
	43	fprintf(stderr, " [ probability PROBABILITY ] [ bandwidth KBPS ]\n");
aba5acdf SH	44	}
aba5acdf SH	45
3d0b7439	46	static int init_gred(struct qdisc_util qu, int argc, char *argv,
ebde8780	47	struct nlmsghdr *n)
aba5acdf SH	48	{
	49
	50	struct rtattr *tail;
cb4bd0ec	51	struct tc_gred_sopt opt = { 0 };
aacee269	52	__u32 limit = 0;
eb6d7d6a DW	53
eb6d7d6a DW	54	opt.def_DP = MAX_DPs;
aba5acdf SH	55
aba5acdf SH	56	while (argc > 0) {
32a121cb	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) {
32a121cb SH	65	fprintf(stderr, "GRED: only %u VQs are currently supported\n",
32a121cb SH	66	MAX_DPs);
aba5acdf SH	67	return -1;
	68	}
	69	} else if (strcmp(*argv, "default") == 0) {
eb6d7d6a	70	if (opt.DPs == 0) {
32a121cb	71	fprintf(stderr, "\"default\" must be defined after \"vqs\"\n");
aba5acdf SH	72	return -1;
aba5acdf SH	73	}
eb6d7d6a DW	74	NEXT_ARG();
	75	if (get_unsigned(&opt.def_DP, *argv, 10)) {
	76	fprintf(stderr, "Illegal \"default\"\n");
	77	return -1;
	78	} else if (opt.def_DP >= opt.DPs) {
32a121cb	79	fprintf(stderr, "\"default\" must be less than \"vqs\"\n");
aba5acdf SH	80	return -1;
	81	}
	82	} else if (strcmp(*argv, "grio") == 0) {
cb4bd0ec	83	opt.grio = 1;
aacee269 DW	84	} else if (strcmp(*argv, "limit") == 0) {
	85	NEXT_ARG();
	86	if (get_size(&limit, *argv)) {
	87	fprintf(stderr, "Illegal \"limit\"\n");
	88	return -1;
	89	}
aba5acdf SH	90	} else if (strcmp(*argv, "help") == 0) {
	91	explain();
	92	return -1;
	93	} else {
	94	fprintf(stderr, "What is \"%s\"?\n", *argv);
	95	explain();
	96	return -1;
	97	}
	98	argc--; argv++;
ebde8780	99	}
aba5acdf	100
eb6d7d6a	101	if (!opt.DPs \|\| opt.def_DP == MAX_DPs) {
32a121cb	102	fprintf(stderr, "Illegal gred setup parameters\n");
ebde8780 SH	103	return -1;
	104	}
	105
32a121cb SH	106	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n", opt.DPs, opt.def_DP);
32a121cb SH	107	n->nlmsg_flags \|= NLM_F_CREATE;
c14f9d92	108	tail = addattr_nest(n, 1024, TCA_OPTIONS);
aba5acdf	109	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
aacee269 DW	110	if (limit)
aacee269 DW	111	addattr32(n, 1024, TCA_GRED_LIMIT, limit);
c14f9d92	112	addattr_nest_end(n, tail);
ebde8780	113	return 0;
aba5acdf SH	114	}
	115	/*
	116	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	117	*/
927e3cfb	118	static int gred_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n, const char *dev)
aba5acdf	119	{
32a121cb	120	int ok = 0;
eb6d7d6a	121	struct tc_gred_qopt opt = { 0 };
32a121cb SH	122	unsigned int burst = 0;
32a121cb SH	123	unsigned int avpkt = 0;
aba5acdf	124	double probability = 0.02;
32a121cb	125	unsigned int rate = 0;
9d9a67c7	126	int parm;
aba5acdf SH	127	__u8 sbuf[256];
aba5acdf SH	128	struct rtattr *tail;
1b6f0bb5	129	__u32 max_P;
aba5acdf	130
eb6d7d6a	131	opt.DP = MAX_DPs;
aba5acdf SH	132
	133	while (argc > 0) {
	134	if (strcmp(*argv, "limit") == 0) {
	135	NEXT_ARG();
	136	if (get_size(&opt.limit, *argv)) {
	137	fprintf(stderr, "Illegal \"limit\"\n");
	138	return -1;
	139	}
	140	ok++;
	141	} else if (strcmp(*argv, "setup") == 0) {
	142	if (ok) {
	143	fprintf(stderr, "Illegal \"setup\"\n");
	144	return -1;
	145	}
d73e0408	146	return init_gred(qu, argc-1, argv+1, n);
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++;
357c45ad DW	161	} else if (strcmp(*argv, "vq") == 0 \|\|
357c45ad DW	162	strcmp(*argv, "DP") == 0) {
aba5acdf	163	NEXT_ARG();
eb6d7d6a	164	if (get_unsigned(&opt.DP, *argv, 10)) {
357c45ad	165	fprintf(stderr, "Illegal \"vq\"\n");
aba5acdf	166	return -1;
eb6d7d6a	167	} else if (opt.DP >= MAX_DPs) {
32a121cb SH	168	fprintf(stderr, "GRED: only %u VQs are currently supported\n",
32a121cb SH	169	MAX_DPs);
eb6d7d6a DW	170	return -1;
eb6d7d6a DW	171	} /* need a better error check */
aba5acdf SH	172	ok++;
	173	} else if (strcmp(*argv, "burst") == 0) {
	174	NEXT_ARG();
d73e0408	175	if (get_unsigned(&burst, *argv, 0)) {
aba5acdf SH	176	fprintf(stderr, "Illegal \"burst\"\n");
	177	return -1;
	178	}
	179	ok++;
	180	} else if (strcmp(*argv, "avpkt") == 0) {
	181	NEXT_ARG();
	182	if (get_size(&avpkt, *argv)) {
	183	fprintf(stderr, "Illegal \"avpkt\"\n");
	184	return -1;
	185	}
	186	ok++;
	187	} else if (strcmp(*argv, "probability") == 0) {
	188	NEXT_ARG();
	189	if (sscanf(*argv, "%lg", &probability) != 1) {
	190	fprintf(stderr, "Illegal \"probability\"\n");
	191	return -1;
	192	}
	193	ok++;
	194	} else if (strcmp(*argv, "prio") == 0) {
	195	NEXT_ARG();
32a121cb	196	opt.prio = strtol(argv, (char *)NULL, 10);
aba5acdf SH	197	/* some error check here */
	198	ok++;
	199	} else if (strcmp(*argv, "bandwidth") == 0) {
	200	NEXT_ARG();
927e3cfb ND	201	if (strchr(*argv, '%')) {
	202	if (get_percent_rate(&rate, *argv, dev)) {
	203	fprintf(stderr, "Illegal \"bandwidth\"\n");
	204	return -1;
	205	}
	206	} else if (get_rate(&rate, *argv)) {
aba5acdf SH	207	fprintf(stderr, "Illegal \"bandwidth\"\n");
	208	return -1;
	209	}
	210	ok++;
	211	} else if (strcmp(*argv, "help") == 0) {
	212	explain();
	213	return -1;
	214	} else {
	215	fprintf(stderr, "What is \"%s\"?\n", *argv);
	216	explain();
	217	return -1;
	218	}
	219	argc--; argv++;
	220	}
	221
a77905ef DW	222	if (!ok) {
	223	explain();
	224	return -1;
	225	}
eb6d7d6a DW	226	if (opt.DP == MAX_DPs \|\| !opt.limit \|\| !opt.qth_min \|\| !opt.qth_max \|\|
eb6d7d6a DW	227	!avpkt) {
32a121cb	228	fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
aba5acdf SH	229	return -1;
aba5acdf SH	230	}
ab15aeac ED	231	if (!burst) {
	232	burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
	233	fprintf(stderr, "GRED: set burst to %u\n", burst);
	234	}
d93c909a DW	235	if (!rate) {
	236	get_rate(&rate, "10Mbit");
	237	fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
	238	}
9d9a67c7	239	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
aba5acdf SH	240	fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
	241	return -1;
	242	}
9d9a67c7	243	if (parm >= 10)
32a121cb SH	244	fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
32a121cb SH	245	burst);
9d9a67c7 DW	246	opt.Wlog = parm;
9d9a67c7 DW	247	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
aba5acdf SH	248	fprintf(stderr, "GRED: failed to calculate probability.\n");
	249	return -1;
	250	}
9d9a67c7 DW	251	opt.Plog = parm;
9d9a67c7 DW	252	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
aba5acdf	253	{
32a121cb	254	fprintf(stderr, "GRED: failed to calculate idle damping table.\n");
aba5acdf SH	255	return -1;
aba5acdf SH	256	}
9d9a67c7	257	opt.Scell_log = parm;
aba5acdf	258
c14f9d92	259	tail = addattr_nest(n, 1024, TCA_OPTIONS);
aba5acdf SH	260	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
aba5acdf SH	261	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
1b6f0bb5 ED	262	max_P = probability * pow(2, 32);
1b6f0bb5 ED	263	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
c14f9d92	264	addattr_nest_end(n, tail);
aba5acdf SH	265	return 0;
	266	}
	267
fdaff63c JK	268	struct tc_gred_info {
	269	__u64 bytes;
	270	__u32 packets;
	271	__u32 backlog;
	272	__u32 prob_drop;
	273	__u32 prob_mark;
	274	__u32 forced_drop;
	275	__u32 forced_mark;
	276	__u32 pdrop;
	277	__u32 other;
	278	};
	279
	280	static void
	281	gred_parse_vqs(struct tc_gred_info info, struct rtattr vqs)
c3e1cd28	282	{
fdaff63c JK	283	int rem = RTA_PAYLOAD(vqs);
	284	unsigned int offset = 0;
	285
	286	while (rem > offset) {
	287	struct rtattr *tb_entry[TCA_GRED_VQ_ENTRY_MAX + 1] = {};
	288	struct rtattr *tb[TCA_GRED_VQ_MAX + 1] = {};
	289	struct rtattr *entry;
	290	unsigned int len;
	291	unsigned int dp;
	292
	293	entry = RTA_DATA(vqs) + offset;
	294
	295	parse_rtattr(tb_entry, TCA_GRED_VQ_ENTRY_MAX, entry,
	296	rem - offset);
	297	len = RTA_LENGTH(RTA_PAYLOAD(entry));
	298	offset += len;
	299
	300	if (!tb_entry[TCA_GRED_VQ_ENTRY]) {
	301	fprintf(stderr,
	302	"ERROR: Failed to parse Virtual Queue entry\n");
	303	continue;
	304	}
	305
	306	parse_rtattr_nested(tb, TCA_GRED_VQ_MAX,
	307	tb_entry[TCA_GRED_VQ_ENTRY]);
	308
	309	if (!tb[TCA_GRED_VQ_DP]) {
	310	fprintf(stderr,
	311	"ERROR: Virtual Queue without DP attribute\n");
	312	continue;
	313	}
	314
	315	dp = rta_getattr_u32(tb[TCA_GRED_VQ_DP]);
	316
	317	if (tb[TCA_GRED_VQ_STAT_BYTES])
	318	info[dp].bytes =
	319	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BYTES]);
	320	if (tb[TCA_GRED_VQ_STAT_PACKETS])
	321	info[dp].packets =
	322	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PACKETS]);
	323	if (tb[TCA_GRED_VQ_STAT_BACKLOG])
	324	info[dp].backlog =
	325	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BACKLOG]);
	326	if (tb[TCA_GRED_VQ_STAT_PROB_DROP])
	327	info[dp].prob_drop =
	328	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_DROP]);
	329	if (tb[TCA_GRED_VQ_STAT_PROB_MARK])
	330	info[dp].prob_mark =
	331	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_MARK]);
	332	if (tb[TCA_GRED_VQ_STAT_FORCED_DROP])
	333	info[dp].forced_drop =
	334	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_DROP]);
	335	if (tb[TCA_GRED_VQ_STAT_FORCED_MARK])
	336	info[dp].forced_mark =
	337	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_MARK]);
	338	if (tb[TCA_GRED_VQ_STAT_PDROP])
	339	info[dp].pdrop =
	340	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PDROP]);
	341	if (tb[TCA_GRED_VQ_STAT_OTHER])
	342	info[dp].other =
	343	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_OTHER]);
	344	}
	345	}
	346
347	static void
348	gred_print_stats(struct tc_gred_info info, struct tc_gred_qopt qopt)
349	{
350	__u64 bytes = info ? info->bytes : qopt->bytesin;
351
c3e1cd28 JK	352	SPRINT_BUF(b1);
	353
	354	if (!is_json_context())
	355	printf("\n Queue size: ");
	356
	357	print_uint(PRINT_JSON, "qave", NULL, qopt->qave);
	358	print_string(PRINT_FP, NULL, "average %s ",
	359	sprint_size(qopt->qave, b1));
	360
	361	print_uint(PRINT_JSON, "backlog", NULL, qopt->backlog);
	362	print_string(PRINT_FP, NULL, "current %s ",
	363	sprint_size(qopt->backlog, b1));
	364
	365	if (!is_json_context())
	366	printf("\n Dropped packets: ");
	367
fdaff63c JK	368	if (info) {
	369	print_uint(PRINT_ANY, "forced_drop", "forced %u ",
	370	info->forced_drop);
	371	print_uint(PRINT_ANY, "prob_drop", "early %u ",
	372	info->prob_drop);
	373	print_uint(PRINT_ANY, "pdrop", "pdrop %u ", info->pdrop);
	374	print_uint(PRINT_ANY, "other", "other %u ", info->other);
	375
	376	if (!is_json_context())
	377	printf("\n Marked packets: ");
	378	print_uint(PRINT_ANY, "forced_mark", "forced %u ",
	379	info->forced_mark);
	380	print_uint(PRINT_ANY, "prob_mark", "early %u ",
	381	info->prob_mark);
	382	} else {
	383	print_uint(PRINT_ANY, "forced_drop", "forced %u ",
	384	qopt->forced);
	385	print_uint(PRINT_ANY, "prob_drop", "early %u ", qopt->early);
	386	print_uint(PRINT_ANY, "pdrop", "pdrop %u ", qopt->pdrop);
	387	print_uint(PRINT_ANY, "other", "other %u ", qopt->other);
	388	}
c3e1cd28 JK	389
	390	if (!is_json_context())
	391	printf("\n Total packets: ");
	392
	393	print_uint(PRINT_ANY, "packets", "%u ", qopt->packets);
	394
fdaff63c JK	395	print_uint(PRINT_JSON, "bytes", NULL, bytes);
fdaff63c JK	396	print_string(PRINT_FP, NULL, "(%s) ", sprint_size(bytes, b1));
c3e1cd28 JK	397	}
c3e1cd28 JK	398
aba5acdf SH	399	static int gred_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
aba5acdf SH	400	{
fdaff63c	401	struct tc_gred_info infos[MAX_DPs] = {};
1b6f0bb5	402	struct rtattr *tb[TCA_GRED_MAX + 1];
1693a4d3	403	struct tc_gred_sopt *sopt;
aba5acdf	404	struct tc_gred_qopt *qopt;
fdaff63c	405	bool vq_info = false;
1b6f0bb5	406	__u32 *max_p = NULL;
aacee269	407	__u32 *limit = NULL;
32a121cb SH	408	unsigned int i;
32a121cb SH	409
aba5acdf	410	SPRINT_BUF(b1);
aba5acdf SH	411
	412	if (opt == NULL)
	413	return 0;
	414
1b6f0bb5	415	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
aba5acdf SH	416
	417	if (tb[TCA_GRED_PARMS] == NULL)
	418	return -1;
a5a6f1e8	419
1b6f0bb5 ED	420	if (tb[TCA_GRED_MAX_P] &&
	421	RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
	422	max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
	423
aacee269 DW	424	if (tb[TCA_GRED_LIMIT] &&
	425	RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
	426	limit = RTA_DATA(tb[TCA_GRED_LIMIT]);
	427
1693a4d3	428	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
aba5acdf	429	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
1693a4d3 DW	430	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) \|\|
1693a4d3 DW	431	RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(qopt)MAX_DPs) {
32a121cb	432	fprintf(f, "\n GRED received message smaller than expected\n");
aba5acdf	433	return -1;
1693a4d3	434	}
ae665a52	435
fdaff63c JK	436	if (tb[TCA_GRED_VQ_LIST] && show_stats) {
	437	gred_parse_vqs(infos, tb[TCA_GRED_VQ_LIST]);
	438	vq_info = true;
	439	}
	440
6475e6a5 JK	441	print_uint(PRINT_ANY, "dp_cnt", "vqs %u ", sopt->DPs);
6475e6a5 JK	442	print_uint(PRINT_ANY, "dp_default", "default %u ", sopt->def_DP);
1693a4d3	443
6475e6a5 JK	444	if (sopt->grio)
	445	print_bool(PRINT_ANY, "grio", "grio ", true);
	446	else
	447	print_bool(PRINT_ANY, "grio", NULL, false);
	448
	449	if (limit) {
	450	print_uint(PRINT_JSON, "limit", NULL, *limit);
	451	print_string(PRINT_FP, NULL, "limit %s ",
	452	sprint_size(*limit, b1));
	453	}
aacee269	454
6475e6a5	455	open_json_array(PRINT_JSON, "vqs");
32a121cb	456	for (i = 0; i < MAX_DPs; i++, qopt++) {
6475e6a5 JK	457	if (qopt->DP >= MAX_DPs)
	458	continue;
	459
	460	open_json_object(NULL);
	461
	462	print_uint(PRINT_ANY, "vq", "\n vq %u ", qopt->DP);
	463	print_hhu(PRINT_ANY, "prio", "prio %hhu ", qopt->prio);
	464
	465	print_uint(PRINT_JSON, "limit", NULL, qopt->limit);
	466	print_string(PRINT_FP, NULL, "limit %s ",
	467	sprint_size(qopt->limit, b1));
	468
	469	print_uint(PRINT_JSON, "min", NULL, qopt->qth_min);
	470	print_string(PRINT_FP, NULL, "min %s ",
	471	sprint_size(qopt->qth_min, b1));
	472
	473	print_uint(PRINT_JSON, "max", NULL, qopt->qth_max);
	474	print_string(PRINT_FP, NULL, "max %s ",
	475	sprint_size(qopt->qth_max, b1));
	476
1693a4d3	477	if (show_details) {
6475e6a5	478	print_uint(PRINT_ANY, "ewma", "ewma %u ", qopt->Wlog);
1693a4d3	479	if (max_p)
6475e6a5 JK	480	print_float(PRINT_ANY, "probability",
	481	"probability %lg ",
	482	max_p[i] / pow(2, 32));
1693a4d3	483	else
6475e6a5 JK	484	print_uint(PRINT_ANY, "Plog", "Plog %u ",
	485	qopt->Plog);
	486	print_uint(PRINT_ANY, "Scell_log", "Scell_log %u ",
	487	qopt->Scell_log);
1693a4d3	488	}
c3e1cd28	489	if (show_stats)
fdaff63c	490	gred_print_stats(vq_info ? &infos[i] : NULL, qopt);
6475e6a5	491	close_json_object();
aba5acdf	492	}
6475e6a5	493	close_json_array(PRINT_JSON, "vqs");
aba5acdf SH	494	return 0;
	495	}
	496
95812b56	497	struct qdisc_util gred_qdisc_util = {
f2f99e2e SH	498	.id = "gred",
	499	.parse_qopt = gred_parse_opt,
	500	.print_qopt = gred_print_opt,
aba5acdf	501	};