[mirror_iproute2.git] / tc / q_pie.c

/* Copyright (C) 2013 Cisco Systems, Inc, 2013.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Author: Vijay Subramanian <vijaynsu@cisco.com>
 * Author: Mythili Prabhu <mysuryan@cisco.com>
 *
 */

#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"

static void explain(void)
{
	fprintf(stderr,
		"Usage: ... pie	[ limit PACKETS ][ target TIME us]\n"
		"		[ tupdate TIME us][ alpha ALPHA ]"
		"[beta BETA ][bytemode | nobytemode][ecn | noecn ]\n");
}

#define ALPHA_MAX 32
#define BETA_MAX 32

static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
			 struct nlmsghdr *n, const char *dev)
{
	unsigned int limit   = 0;
	unsigned int target  = 0;
	unsigned int tupdate = 0;
	unsigned int alpha   = 0;
	unsigned int beta    = 0;
	int ecn = -1;
	int bytemode = -1;
	struct rtattr *tail;

	while (argc > 0) {
		if (strcmp(*argv, "limit") == 0) {
			NEXT_ARG();
			if (get_unsigned(&limit, *argv, 0)) {
				fprintf(stderr, "Illegal \"limit\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "target") == 0) {
			NEXT_ARG();
			if (get_time(&target, *argv)) {
				fprintf(stderr, "Illegal \"target\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "tupdate") == 0) {
			NEXT_ARG();
			if (get_time(&tupdate, *argv)) {
				fprintf(stderr, "Illegal \"tupdate\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "alpha") == 0) {
			NEXT_ARG();
			if (get_unsigned(&alpha, *argv, 0) ||
			    (alpha > ALPHA_MAX)) {
				fprintf(stderr, "Illegal \"alpha\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "beta") == 0) {
			NEXT_ARG();
			if (get_unsigned(&beta, *argv, 0) ||
			    (beta > BETA_MAX)) {
				fprintf(stderr, "Illegal \"beta\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "ecn") == 0) {
			ecn = 1;
		} else if (strcmp(*argv, "noecn") == 0) {
			ecn = 0;
		} else if (strcmp(*argv, "bytemode") == 0) {
			bytemode = 1;
		} else if (strcmp(*argv, "nobytemode") == 0) {
			bytemode = 0;
		} else if (strcmp(*argv, "help") == 0) {
			explain();
			return -1;
		} else {
			fprintf(stderr, "What is \"%s\"?\n", *argv);
			explain();
			return -1;
		}
		argc--;
		argv++;
	}

	tail = addattr_nest(n, 1024, TCA_OPTIONS);
	if (limit)
		addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
	if (tupdate)
		addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
	if (target)
		addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
	if (alpha)
		addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
	if (beta)
		addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
	if (ecn != -1)
		addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
	if (bytemode != -1)
		addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode,
			  sizeof(bytemode));

	addattr_nest_end(n, tail);
	return 0;
}

static int pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
	struct rtattr *tb[TCA_PIE_MAX + 1];
	unsigned int limit;
	unsigned int tupdate;
	unsigned int target;
	unsigned int alpha;
	unsigned int beta;
	unsigned int ecn;
	unsigned int bytemode;

	SPRINT_BUF(b1);

	if (opt == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_PIE_MAX, opt);

	if (tb[TCA_PIE_LIMIT] &&
	    RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
		limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]);
		fprintf(f, "limit %up ", limit);
	}
	if (tb[TCA_PIE_TARGET] &&
	    RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
		target = rta_getattr_u32(tb[TCA_PIE_TARGET]);
		fprintf(f, "target %s ", sprint_time(target, b1));
	}
	if (tb[TCA_PIE_TUPDATE] &&
	    RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
		tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]);
		fprintf(f, "tupdate %s ", sprint_time(tupdate, b1));
	}
	if (tb[TCA_PIE_ALPHA] &&
	    RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
		alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]);
		fprintf(f, "alpha %u ", alpha);
	}
	if (tb[TCA_PIE_BETA] &&
	    RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
		beta = rta_getattr_u32(tb[TCA_PIE_BETA]);
		fprintf(f, "beta %u ", beta);
	}

	if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
		ecn = rta_getattr_u32(tb[TCA_PIE_ECN]);
		if (ecn)
			fprintf(f, "ecn ");
	}

	if (tb[TCA_PIE_BYTEMODE] &&
	    RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
		bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]);
		if (bytemode)
			fprintf(f, "bytemode ");
	}

	return 0;
}

static int pie_print_xstats(struct qdisc_util *qu, FILE *f,
			    struct rtattr *xstats)
{
	struct tc_pie_xstats *st;

	if (xstats == NULL)
		return 0;

	if (RTA_PAYLOAD(xstats) < sizeof(*st))
		return -1;

	st = RTA_DATA(xstats);
	/*prob is returned as a fracion of maximum integer value */
	fprintf(f, "prob %f delay %uus avg_dq_rate %u\n",
		(double)st->prob / UINT64_MAX, st->delay,
		st->avg_dq_rate);
	fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n",
		st->packets_in, st->overlimit, st->dropped, st->maxq,
		st->ecn_mark);
	return 0;

}

struct qdisc_util pie_qdisc_util = {
	.id = "pie",
	.parse_qopt	= pie_parse_opt,
	.print_qopt	= pie_print_opt,
	.print_xstats	= pie_print_xstats,
};
Commit	Line	Data
80dd880d VS	1	/* Copyright (C) 2013 Cisco Systems, Inc, 2013.
	2	*
	3	* This program is free software; you can redistribute it and/or
	4	* modify it under the terms of the GNU General Public License
	5	* as published by the Free Software Foundation; either version 2
	6	* of the License.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* Author: Vijay Subramanian <vijaynsu@cisco.com>
	14	* Author: Mythili Prabhu <mysuryan@cisco.com>
	15	*
	16	*/
	17
	18	#include <stdio.h>
	19	#include <stdlib.h>
	20	#include <unistd.h>
80dd880d VS	21	#include <fcntl.h>
	22	#include <sys/socket.h>
	23	#include <netinet/in.h>
	24	#include <arpa/inet.h>
	25	#include <string.h>
	26	#include <math.h>
	27
	28	#include "utils.h"
	29	#include "tc_util.h"
	30
	31	static void explain(void)
	32	{
8589eb4e MC	33	fprintf(stderr,
	34	"Usage: ... pie [ limit PACKETS ][ target TIME us]\n"
	35	" [ tupdate TIME us][ alpha ALPHA ]"
	36	"[beta BETA ][bytemode \| nobytemode][ecn \| noecn ]\n");
80dd880d VS	37	}
	38
	39	#define ALPHA_MAX 32
80dd880d	40	#define BETA_MAX 32
80dd880d VS	41
80dd880d VS	42	static int pie_parse_opt(struct qdisc_util qu, int argc, char *argv,
927e3cfb	43	struct nlmsghdr n, const char dev)
80dd880d VS	44	{
	45	unsigned int limit = 0;
	46	unsigned int target = 0;
	47	unsigned int tupdate = 0;
	48	unsigned int alpha = 0;
	49	unsigned int beta = 0;
	50	int ecn = -1;
	51	int bytemode = -1;
	52	struct rtattr *tail;
	53
	54	while (argc > 0) {
	55	if (strcmp(*argv, "limit") == 0) {
	56	NEXT_ARG();
	57	if (get_unsigned(&limit, *argv, 0)) {
	58	fprintf(stderr, "Illegal \"limit\"\n");
	59	return -1;
	60	}
	61	} else if (strcmp(*argv, "target") == 0) {
	62	NEXT_ARG();
	63	if (get_time(&target, *argv)) {
	64	fprintf(stderr, "Illegal \"target\"\n");
	65	return -1;
	66	}
	67	} else if (strcmp(*argv, "tupdate") == 0) {
	68	NEXT_ARG();
	69	if (get_time(&tupdate, *argv)) {
	70	fprintf(stderr, "Illegal \"tupdate\"\n");
	71	return -1;
	72	}
	73	} else if (strcmp(*argv, "alpha") == 0) {
	74	NEXT_ARG();
	75	if (get_unsigned(&alpha, *argv, 0) \|\|
60ccfcd7	76	(alpha > ALPHA_MAX)) {
80dd880d VS	77	fprintf(stderr, "Illegal \"alpha\"\n");
	78	return -1;
	79	}
	80	} else if (strcmp(*argv, "beta") == 0) {
	81	NEXT_ARG();
	82	if (get_unsigned(&beta, *argv, 0) \|\|
60ccfcd7	83	(beta > BETA_MAX)) {
80dd880d VS	84	fprintf(stderr, "Illegal \"beta\"\n");
	85	return -1;
	86	}
	87	} else if (strcmp(*argv, "ecn") == 0) {
	88	ecn = 1;
	89	} else if (strcmp(*argv, "noecn") == 0) {
	90	ecn = 0;
	91	} else if (strcmp(*argv, "bytemode") == 0) {
	92	bytemode = 1;
	93	} else if (strcmp(*argv, "nobytemode") == 0) {
	94	bytemode = 0;
	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--;
	104	argv++;
	105	}
	106
c14f9d92	107	tail = addattr_nest(n, 1024, TCA_OPTIONS);
80dd880d VS	108	if (limit)
	109	addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
	110	if (tupdate)
	111	addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
	112	if (target)
	113	addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
	114	if (alpha)
	115	addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
	116	if (beta)
	117	addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
	118	if (ecn != -1)
	119	addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
	120	if (bytemode != -1)
	121	addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode,
	122	sizeof(bytemode));
	123
c14f9d92	124	addattr_nest_end(n, tail);
80dd880d VS	125	return 0;
	126	}
	127
	128	static int pie_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	129	{
	130	struct rtattr *tb[TCA_PIE_MAX + 1];
	131	unsigned int limit;
	132	unsigned int tupdate;
	133	unsigned int target;
	134	unsigned int alpha;
	135	unsigned int beta;
32a121cb SH	136	unsigned int ecn;
	137	unsigned int bytemode;
	138
80dd880d VS	139	SPRINT_BUF(b1);
	140
	141	if (opt == NULL)
	142	return 0;
	143
	144	parse_rtattr_nested(tb, TCA_PIE_MAX, opt);
	145
	146	if (tb[TCA_PIE_LIMIT] &&
	147	RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
	148	limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]);
	149	fprintf(f, "limit %up ", limit);
	150	}
	151	if (tb[TCA_PIE_TARGET] &&
	152	RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
	153	target = rta_getattr_u32(tb[TCA_PIE_TARGET]);
	154	fprintf(f, "target %s ", sprint_time(target, b1));
	155	}
	156	if (tb[TCA_PIE_TUPDATE] &&
	157	RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
	158	tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]);
	159	fprintf(f, "tupdate %s ", sprint_time(tupdate, b1));
	160	}
	161	if (tb[TCA_PIE_ALPHA] &&
	162	RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
	163	alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]);
	164	fprintf(f, "alpha %u ", alpha);
	165	}
	166	if (tb[TCA_PIE_BETA] &&
	167	RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
	168	beta = rta_getattr_u32(tb[TCA_PIE_BETA]);
	169	fprintf(f, "beta %u ", beta);
	170	}
	171
	172	if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
	173	ecn = rta_getattr_u32(tb[TCA_PIE_ECN]);
	174	if (ecn)
	175	fprintf(f, "ecn ");
	176	}
	177
	178	if (tb[TCA_PIE_BYTEMODE] &&
	179	RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
	180	bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]);
	181	if (bytemode)
	182	fprintf(f, "bytemode ");
	183	}
	184
	185	return 0;
	186	}
	187
	188	static int pie_print_xstats(struct qdisc_util qu, FILE f,
	189	struct rtattr *xstats)
	190	{
	191	struct tc_pie_xstats *st;
	192
	193	if (xstats == NULL)
	194	return 0;
	195
	196	if (RTA_PAYLOAD(xstats) < sizeof(*st))
	197	return -1;
	198
	199	st = RTA_DATA(xstats);
	200	/prob is returned as a fracion of maximum integer value /
	201	fprintf(f, "prob %f delay %uus avg_dq_rate %u\n",
492ec955	202	(double)st->prob / UINT64_MAX, st->delay,
80dd880d VS	203	st->avg_dq_rate);
	204	fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n",
	205	st->packets_in, st->overlimit, st->dropped, st->maxq,
	206	st->ecn_mark);
	207	return 0;
	208
	209	}
	210
	211	struct qdisc_util pie_qdisc_util = {
	212	.id = "pie",
	213	.parse_qopt = pie_parse_opt,
	214	.print_qopt = pie_print_opt,
	215	.print_xstats = pie_print_xstats,
	216	};