[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"
		"           default DEFAULT_VQ [ grio ] [ limit BYTES ] [ecn] [harddrop]\n"
		"       tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n"
		"           min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n"
		"           [ probability PROBABILITY ] [ bandwidth KBPS ] [ecn] [harddrop]\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, "ecn") == 0) {
			opt.flags |= TC_RED_ECN;
		} else if (strcmp(*argv, "harddrop") == 0) {
			opt.flags |= TC_RED_HARDDROP;
		} 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)
{
	struct rtattr *tail, *entry, *vqs;
	int ok = 0;
	struct tc_gred_qopt opt = { 0 };
	unsigned int burst = 0;
	unsigned int avpkt = 0;
	unsigned int flags = 0;
	double probability = 0.02;
	unsigned int rate = 0;
	int parm;
	__u8 sbuf[256];
	__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, "ecn") == 0) {
			flags |= TC_RED_ECN;
		} else if (strcmp(*argv, "harddrop") == 0) {
			flags |= TC_RED_HARDDROP;
		} 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);

	vqs = addattr_nest(n, 1024, TCA_GRED_VQ_LIST);
	entry = addattr_nest(n, 1024, TCA_GRED_VQ_ENTRY);
	addattr32(n, 1024, TCA_GRED_VQ_DP, opt.DP);
	addattr32(n, 1024, TCA_GRED_VQ_FLAGS, flags);
	addattr_nest_end(n, entry);
	addattr_nest_end(n, vqs);

	addattr_nest_end(n, tail);
	return 0;
}

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

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]);
		info[dp].flags_present = !!tb[TCA_GRED_VQ_FLAGS];
		if (tb[TCA_GRED_VQ_FLAGS])
			info[dp].flags =
				rta_getattr_u32(tb[TCA_GRED_VQ_FLAGS]);
	}
}

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

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

	print_size(PRINT_ANY, "qave", "average %s ", qopt->qave);
	print_size(PRINT_ANY, "backlog", "current %s ", qopt->backlog);

	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_size(PRINT_ANY, "bytes", "(%s) ", bytes);
}

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;

	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]) {
		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_size(PRINT_ANY, "limit", "limit %s ", *limit);

	tc_red_print_flags(sopt->flags);

	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_size(PRINT_ANY, "limit", "limit %s ", qopt->limit);
		print_size(PRINT_ANY, "min", "min %s ", qopt->qth_min);
		print_size(PRINT_ANY, "max", "max %s ", qopt->qth_max);

		if (infos[i].flags_present)
			tc_red_print_flags(infos[i].flags);

		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	{
8589eb4e MC	39	fprintf(stderr,
	40	"Usage: tc qdisc { add \| replace \| change } ... gred setup vqs NUMBER\n"
	41	" default DEFAULT_VQ [ grio ] [ limit BYTES ] [ecn] [harddrop]\n"
	42	" tc qdisc change ... gred vq VQ [ prio VALUE ] limit BYTES\n"
	43	" min BYTES max BYTES avpkt BYTES [ burst PACKETS ]\n"
	44	" [ probability PROBABILITY ] [ bandwidth KBPS ] [ecn] [harddrop]\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	}
2d7c564a JK	91	} else if (strcmp(*argv, "ecn") == 0) {
	92	opt.flags \|= TC_RED_ECN;
	93	} else if (strcmp(*argv, "harddrop") == 0) {
	94	opt.flags \|= TC_RED_HARDDROP;
aba5acdf SH	95	} else if (strcmp(*argv, "help") == 0) {
	96	explain();
	97	return -1;
	98	} else {
	99	fprintf(stderr, "What is \"%s\"?\n", *argv);
	100	explain();
	101	return -1;
	102	}
	103	argc--; argv++;
ebde8780	104	}
aba5acdf	105
eb6d7d6a	106	if (!opt.DPs \|\| opt.def_DP == MAX_DPs) {
32a121cb	107	fprintf(stderr, "Illegal gred setup parameters\n");
ebde8780 SH	108	return -1;
	109	}
	110
32a121cb SH	111	DPRINTF("TC_GRED: sending DPs=%u def_DP=%u\n", opt.DPs, opt.def_DP);
32a121cb SH	112	n->nlmsg_flags \|= NLM_F_CREATE;
c14f9d92	113	tail = addattr_nest(n, 1024, TCA_OPTIONS);
aba5acdf	114	addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt));
aacee269 DW	115	if (limit)
aacee269 DW	116	addattr32(n, 1024, TCA_GRED_LIMIT, limit);
c14f9d92	117	addattr_nest_end(n, tail);
ebde8780	118	return 0;
aba5acdf SH	119	}
	120	/*
	121	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	122	*/
927e3cfb	123	static int gred_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n, const char *dev)
aba5acdf	124	{
f7a8749a	125	struct rtattr tail, entry, *vqs;
32a121cb	126	int ok = 0;
eb6d7d6a	127	struct tc_gred_qopt opt = { 0 };
32a121cb SH	128	unsigned int burst = 0;
32a121cb SH	129	unsigned int avpkt = 0;
f7a8749a	130	unsigned int flags = 0;
aba5acdf	131	double probability = 0.02;
32a121cb	132	unsigned int rate = 0;
9d9a67c7	133	int parm;
aba5acdf	134	__u8 sbuf[256];
1b6f0bb5	135	__u32 max_P;
aba5acdf	136
eb6d7d6a	137	opt.DP = MAX_DPs;
aba5acdf SH	138
	139	while (argc > 0) {
	140	if (strcmp(*argv, "limit") == 0) {
	141	NEXT_ARG();
	142	if (get_size(&opt.limit, *argv)) {
	143	fprintf(stderr, "Illegal \"limit\"\n");
	144	return -1;
	145	}
	146	ok++;
	147	} else if (strcmp(*argv, "setup") == 0) {
	148	if (ok) {
	149	fprintf(stderr, "Illegal \"setup\"\n");
	150	return -1;
	151	}
d73e0408	152	return init_gred(qu, argc-1, argv+1, n);
aba5acdf SH	153	} else if (strcmp(*argv, "min") == 0) {
	154	NEXT_ARG();
	155	if (get_size(&opt.qth_min, *argv)) {
	156	fprintf(stderr, "Illegal \"min\"\n");
	157	return -1;
	158	}
	159	ok++;
	160	} else if (strcmp(*argv, "max") == 0) {
	161	NEXT_ARG();
	162	if (get_size(&opt.qth_max, *argv)) {
	163	fprintf(stderr, "Illegal \"max\"\n");
	164	return -1;
	165	}
	166	ok++;
357c45ad DW	167	} else if (strcmp(*argv, "vq") == 0 \|\|
357c45ad DW	168	strcmp(*argv, "DP") == 0) {
aba5acdf	169	NEXT_ARG();
eb6d7d6a	170	if (get_unsigned(&opt.DP, *argv, 10)) {
357c45ad	171	fprintf(stderr, "Illegal \"vq\"\n");
aba5acdf	172	return -1;
eb6d7d6a	173	} else if (opt.DP >= MAX_DPs) {
32a121cb SH	174	fprintf(stderr, "GRED: only %u VQs are currently supported\n",
32a121cb SH	175	MAX_DPs);
eb6d7d6a DW	176	return -1;
eb6d7d6a DW	177	} /* need a better error check */
aba5acdf SH	178	ok++;
	179	} else if (strcmp(*argv, "burst") == 0) {
	180	NEXT_ARG();
d73e0408	181	if (get_unsigned(&burst, *argv, 0)) {
aba5acdf SH	182	fprintf(stderr, "Illegal \"burst\"\n");
	183	return -1;
	184	}
	185	ok++;
	186	} else if (strcmp(*argv, "avpkt") == 0) {
	187	NEXT_ARG();
	188	if (get_size(&avpkt, *argv)) {
	189	fprintf(stderr, "Illegal \"avpkt\"\n");
	190	return -1;
	191	}
	192	ok++;
	193	} else if (strcmp(*argv, "probability") == 0) {
	194	NEXT_ARG();
	195	if (sscanf(*argv, "%lg", &probability) != 1) {
	196	fprintf(stderr, "Illegal \"probability\"\n");
	197	return -1;
	198	}
	199	ok++;
	200	} else if (strcmp(*argv, "prio") == 0) {
	201	NEXT_ARG();
32a121cb	202	opt.prio = strtol(argv, (char *)NULL, 10);
aba5acdf SH	203	/* some error check here */
	204	ok++;
	205	} else if (strcmp(*argv, "bandwidth") == 0) {
	206	NEXT_ARG();
927e3cfb ND	207	if (strchr(*argv, '%')) {
	208	if (get_percent_rate(&rate, *argv, dev)) {
	209	fprintf(stderr, "Illegal \"bandwidth\"\n");
	210	return -1;
	211	}
	212	} else if (get_rate(&rate, *argv)) {
aba5acdf SH	213	fprintf(stderr, "Illegal \"bandwidth\"\n");
	214	return -1;
	215	}
	216	ok++;
f7a8749a JK	217	} else if (strcmp(*argv, "ecn") == 0) {
	218	flags \|= TC_RED_ECN;
	219	} else if (strcmp(*argv, "harddrop") == 0) {
	220	flags \|= TC_RED_HARDDROP;
aba5acdf SH	221	} else if (strcmp(*argv, "help") == 0) {
	222	explain();
	223	return -1;
	224	} else {
	225	fprintf(stderr, "What is \"%s\"?\n", *argv);
	226	explain();
	227	return -1;
	228	}
	229	argc--; argv++;
	230	}
	231
a77905ef DW	232	if (!ok) {
	233	explain();
	234	return -1;
	235	}
eb6d7d6a DW	236	if (opt.DP == MAX_DPs \|\| !opt.limit \|\| !opt.qth_min \|\| !opt.qth_max \|\|
eb6d7d6a DW	237	!avpkt) {
32a121cb	238	fprintf(stderr, "Required parameter (vq, limit, min, max, avpkt) is missing\n");
aba5acdf SH	239	return -1;
aba5acdf SH	240	}
ab15aeac ED	241	if (!burst) {
	242	burst = (2 * opt.qth_min + opt.qth_max) / (3 * avpkt);
	243	fprintf(stderr, "GRED: set burst to %u\n", burst);
	244	}
d93c909a DW	245	if (!rate) {
	246	get_rate(&rate, "10Mbit");
	247	fprintf(stderr, "GRED: set bandwidth to 10Mbit\n");
	248	}
9d9a67c7	249	if ((parm = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
aba5acdf SH	250	fprintf(stderr, "GRED: failed to calculate EWMA constant.\n");
	251	return -1;
	252	}
9d9a67c7	253	if (parm >= 10)
32a121cb SH	254	fprintf(stderr, "GRED: WARNING. Burst %u seems to be too large.\n",
32a121cb SH	255	burst);
9d9a67c7 DW	256	opt.Wlog = parm;
9d9a67c7 DW	257	if ((parm = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
aba5acdf SH	258	fprintf(stderr, "GRED: failed to calculate probability.\n");
	259	return -1;
	260	}
9d9a67c7 DW	261	opt.Plog = parm;
9d9a67c7 DW	262	if ((parm = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0)
aba5acdf	263	{
32a121cb	264	fprintf(stderr, "GRED: failed to calculate idle damping table.\n");
aba5acdf SH	265	return -1;
aba5acdf SH	266	}
9d9a67c7	267	opt.Scell_log = parm;
aba5acdf	268
c14f9d92	269	tail = addattr_nest(n, 1024, TCA_OPTIONS);
aba5acdf SH	270	addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt));
aba5acdf SH	271	addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256);
1b6f0bb5 ED	272	max_P = probability * pow(2, 32);
1b6f0bb5 ED	273	addattr32(n, 1024, TCA_GRED_MAX_P, max_P);
f7a8749a JK	274
	275	vqs = addattr_nest(n, 1024, TCA_GRED_VQ_LIST);
	276	entry = addattr_nest(n, 1024, TCA_GRED_VQ_ENTRY);
	277	addattr32(n, 1024, TCA_GRED_VQ_DP, opt.DP);
	278	addattr32(n, 1024, TCA_GRED_VQ_FLAGS, flags);
	279	addattr_nest_end(n, entry);
	280	addattr_nest_end(n, vqs);
	281
c14f9d92	282	addattr_nest_end(n, tail);
aba5acdf SH	283	return 0;
	284	}
	285
fdaff63c	286	struct tc_gred_info {
f7a8749a	287	bool flags_present;
fdaff63c JK	288	__u64 bytes;
	289	__u32 packets;
	290	__u32 backlog;
	291	__u32 prob_drop;
	292	__u32 prob_mark;
	293	__u32 forced_drop;
	294	__u32 forced_mark;
	295	__u32 pdrop;
	296	__u32 other;
f7a8749a	297	__u32 flags;
fdaff63c JK	298	};
	299
	300	static void
	301	gred_parse_vqs(struct tc_gred_info info, struct rtattr vqs)
c3e1cd28	302	{
fdaff63c JK	303	int rem = RTA_PAYLOAD(vqs);
	304	unsigned int offset = 0;
	305
	306	while (rem > offset) {
	307	struct rtattr *tb_entry[TCA_GRED_VQ_ENTRY_MAX + 1] = {};
	308	struct rtattr *tb[TCA_GRED_VQ_MAX + 1] = {};
	309	struct rtattr *entry;
	310	unsigned int len;
	311	unsigned int dp;
	312
	313	entry = RTA_DATA(vqs) + offset;
	314
	315	parse_rtattr(tb_entry, TCA_GRED_VQ_ENTRY_MAX, entry,
	316	rem - offset);
	317	len = RTA_LENGTH(RTA_PAYLOAD(entry));
	318	offset += len;
	319
	320	if (!tb_entry[TCA_GRED_VQ_ENTRY]) {
	321	fprintf(stderr,
	322	"ERROR: Failed to parse Virtual Queue entry\n");
	323	continue;
	324	}
	325
	326	parse_rtattr_nested(tb, TCA_GRED_VQ_MAX,
	327	tb_entry[TCA_GRED_VQ_ENTRY]);
	328
	329	if (!tb[TCA_GRED_VQ_DP]) {
	330	fprintf(stderr,
	331	"ERROR: Virtual Queue without DP attribute\n");
	332	continue;
	333	}
	334
	335	dp = rta_getattr_u32(tb[TCA_GRED_VQ_DP]);
	336
	337	if (tb[TCA_GRED_VQ_STAT_BYTES])
	338	info[dp].bytes =
	339	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BYTES]);
	340	if (tb[TCA_GRED_VQ_STAT_PACKETS])
	341	info[dp].packets =
	342	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PACKETS]);
	343	if (tb[TCA_GRED_VQ_STAT_BACKLOG])
	344	info[dp].backlog =
	345	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_BACKLOG]);
	346	if (tb[TCA_GRED_VQ_STAT_PROB_DROP])
	347	info[dp].prob_drop =
	348	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_DROP]);
	349	if (tb[TCA_GRED_VQ_STAT_PROB_MARK])
	350	info[dp].prob_mark =
	351	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PROB_MARK]);
	352	if (tb[TCA_GRED_VQ_STAT_FORCED_DROP])
	353	info[dp].forced_drop =
	354	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_DROP]);
	355	if (tb[TCA_GRED_VQ_STAT_FORCED_MARK])
	356	info[dp].forced_mark =
	357	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_FORCED_MARK]);
	358	if (tb[TCA_GRED_VQ_STAT_PDROP])
	359	info[dp].pdrop =
	360	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_PDROP]);
	361	if (tb[TCA_GRED_VQ_STAT_OTHER])
	362	info[dp].other =
	363	rta_getattr_u32(tb[TCA_GRED_VQ_STAT_OTHER]);
f7a8749a JK	364	info[dp].flags_present = !!tb[TCA_GRED_VQ_FLAGS];
	365	if (tb[TCA_GRED_VQ_FLAGS])
	366	info[dp].flags =
	367	rta_getattr_u32(tb[TCA_GRED_VQ_FLAGS]);
fdaff63c JK	368	}
	369	}
	370
	371	static void
	372	gred_print_stats(struct tc_gred_info info, struct tc_gred_qopt qopt)
	373	{
	374	__u64 bytes = info ? info->bytes : qopt->bytesin;
	375
c3e1cd28 JK	376	if (!is_json_context())
	377	printf("\n Queue size: ");
	378
adbe5de9 PM	379	print_size(PRINT_ANY, "qave", "average %s ", qopt->qave);
adbe5de9 PM	380	print_size(PRINT_ANY, "backlog", "current %s ", qopt->backlog);
c3e1cd28 JK	381
	382	if (!is_json_context())
	383	printf("\n Dropped packets: ");
	384
fdaff63c JK	385	if (info) {
	386	print_uint(PRINT_ANY, "forced_drop", "forced %u ",
	387	info->forced_drop);
	388	print_uint(PRINT_ANY, "prob_drop", "early %u ",
	389	info->prob_drop);
	390	print_uint(PRINT_ANY, "pdrop", "pdrop %u ", info->pdrop);
	391	print_uint(PRINT_ANY, "other", "other %u ", info->other);
	392
	393	if (!is_json_context())
	394	printf("\n Marked packets: ");
	395	print_uint(PRINT_ANY, "forced_mark", "forced %u ",
	396	info->forced_mark);
	397	print_uint(PRINT_ANY, "prob_mark", "early %u ",
	398	info->prob_mark);
	399	} else {
	400	print_uint(PRINT_ANY, "forced_drop", "forced %u ",
	401	qopt->forced);
	402	print_uint(PRINT_ANY, "prob_drop", "early %u ", qopt->early);
	403	print_uint(PRINT_ANY, "pdrop", "pdrop %u ", qopt->pdrop);
	404	print_uint(PRINT_ANY, "other", "other %u ", qopt->other);
	405	}
c3e1cd28 JK	406
	407	if (!is_json_context())
	408	printf("\n Total packets: ");
	409
	410	print_uint(PRINT_ANY, "packets", "%u ", qopt->packets);
adbe5de9	411	print_size(PRINT_ANY, "bytes", "(%s) ", bytes);
c3e1cd28 JK	412	}
c3e1cd28 JK	413
aba5acdf SH	414	static int gred_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
aba5acdf SH	415	{
fdaff63c	416	struct tc_gred_info infos[MAX_DPs] = {};
1b6f0bb5	417	struct rtattr *tb[TCA_GRED_MAX + 1];
1693a4d3	418	struct tc_gred_sopt *sopt;
aba5acdf	419	struct tc_gred_qopt *qopt;
fdaff63c	420	bool vq_info = false;
1b6f0bb5	421	__u32 *max_p = NULL;
aacee269	422	__u32 *limit = NULL;
32a121cb SH	423	unsigned int i;
32a121cb SH	424
aba5acdf SH	425	if (opt == NULL)
	426	return 0;
	427
1b6f0bb5	428	parse_rtattr_nested(tb, TCA_GRED_MAX, opt);
aba5acdf SH	429
	430	if (tb[TCA_GRED_PARMS] == NULL)
	431	return -1;
a5a6f1e8	432
1b6f0bb5 ED	433	if (tb[TCA_GRED_MAX_P] &&
	434	RTA_PAYLOAD(tb[TCA_GRED_MAX_P]) >= sizeof(__u32) * MAX_DPs)
	435	max_p = RTA_DATA(tb[TCA_GRED_MAX_P]);
	436
aacee269 DW	437	if (tb[TCA_GRED_LIMIT] &&
	438	RTA_PAYLOAD(tb[TCA_GRED_LIMIT]) == sizeof(__u32))
	439	limit = RTA_DATA(tb[TCA_GRED_LIMIT]);
	440
1693a4d3	441	sopt = RTA_DATA(tb[TCA_GRED_DPS]);
aba5acdf	442	qopt = RTA_DATA(tb[TCA_GRED_PARMS]);
1693a4d3 DW	443	if (RTA_PAYLOAD(tb[TCA_GRED_DPS]) < sizeof(*sopt) \|\|
1693a4d3 DW	444	RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(qopt)MAX_DPs) {
32a121cb	445	fprintf(f, "\n GRED received message smaller than expected\n");
aba5acdf	446	return -1;
1693a4d3	447	}
ae665a52	448
f7a8749a	449	if (tb[TCA_GRED_VQ_LIST]) {
fdaff63c JK	450	gred_parse_vqs(infos, tb[TCA_GRED_VQ_LIST]);
	451	vq_info = true;
	452	}
	453
6475e6a5 JK	454	print_uint(PRINT_ANY, "dp_cnt", "vqs %u ", sopt->DPs);
6475e6a5 JK	455	print_uint(PRINT_ANY, "dp_default", "default %u ", sopt->def_DP);
1693a4d3	456
6475e6a5 JK	457	if (sopt->grio)
	458	print_bool(PRINT_ANY, "grio", "grio ", true);
	459	else
	460	print_bool(PRINT_ANY, "grio", NULL, false);
	461
adbe5de9 PM	462	if (limit)
adbe5de9 PM	463	print_size(PRINT_ANY, "limit", "limit %s ", *limit);
aacee269	464
2d7c564a JK	465	tc_red_print_flags(sopt->flags);
2d7c564a JK	466
6475e6a5	467	open_json_array(PRINT_JSON, "vqs");
32a121cb	468	for (i = 0; i < MAX_DPs; i++, qopt++) {
6475e6a5 JK	469	if (qopt->DP >= MAX_DPs)
	470	continue;
	471
	472	open_json_object(NULL);
	473
	474	print_uint(PRINT_ANY, "vq", "\n vq %u ", qopt->DP);
	475	print_hhu(PRINT_ANY, "prio", "prio %hhu ", qopt->prio);
adbe5de9 PM	476	print_size(PRINT_ANY, "limit", "limit %s ", qopt->limit);
	477	print_size(PRINT_ANY, "min", "min %s ", qopt->qth_min);
	478	print_size(PRINT_ANY, "max", "max %s ", qopt->qth_max);
6475e6a5	479
f7a8749a JK	480	if (infos[i].flags_present)
	481	tc_red_print_flags(infos[i].flags);
	482
1693a4d3	483	if (show_details) {
6475e6a5	484	print_uint(PRINT_ANY, "ewma", "ewma %u ", qopt->Wlog);
1693a4d3	485	if (max_p)
6475e6a5 JK	486	print_float(PRINT_ANY, "probability",
	487	"probability %lg ",
	488	max_p[i] / pow(2, 32));
1693a4d3	489	else
6475e6a5 JK	490	print_uint(PRINT_ANY, "Plog", "Plog %u ",
	491	qopt->Plog);
	492	print_uint(PRINT_ANY, "Scell_log", "Scell_log %u ",
	493	qopt->Scell_log);
1693a4d3	494	}
c3e1cd28	495	if (show_stats)
fdaff63c	496	gred_print_stats(vq_info ? &infos[i] : NULL, qopt);
6475e6a5	497	close_json_object();
aba5acdf	498	}
6475e6a5	499	close_json_array(PRINT_JSON, "vqs");
aba5acdf SH	500	return 0;
	501	}
	502
95812b56	503	struct qdisc_util gred_qdisc_util = {
f2f99e2e SH	504	.id = "gred",
	505	.parse_qopt = gred_parse_opt,
	506	.print_qopt = gred_print_opt,
aba5acdf	507	};