[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 <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"

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

#define ALPHA_MAX 32
#define ALPHA_MIN 0
#define BETA_MAX 32
#define BETA_MIN 0

static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
			 struct nlmsghdr *n)
{
	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) || (alpha < ALPHA_MIN)) {
				fprintf(stderr, "Illegal \"alpha\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "beta") == 0) {
			NEXT_ARG();
			if (get_unsigned(&beta, *argv, 0) ||
			    (beta > BETA_MAX) || (beta < BETA_MIN)) {
				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 = NLMSG_TAIL(n);
	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	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));

	tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)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 / (double)0xffffffff, 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>
	21	#include <syslog.h>
	22	#include <fcntl.h>
	23	#include <sys/socket.h>
	24	#include <netinet/in.h>
	25	#include <arpa/inet.h>
	26	#include <string.h>
	27	#include <math.h>
	28
	29	#include "utils.h"
	30	#include "tc_util.h"
	31
	32	static void explain(void)
	33	{
	34	fprintf(stderr, "Usage: ... pie [ limit PACKETS ][ target TIME us]\n");
	35	fprintf(stderr, " [ tupdate TIME us][ alpha ALPHA ]");
	36	fprintf(stderr, "[beta BETA ][bytemode \| nobytemode][ecn \| noecn ]\n");
	37	}
	38
	39	#define ALPHA_MAX 32
	40	#define ALPHA_MIN 0
	41	#define BETA_MAX 32
	42	#define BETA_MIN 0
	43
	44	static int pie_parse_opt(struct qdisc_util qu, int argc, char *argv,
	45	struct nlmsghdr *n)
	46	{
	47	unsigned int limit = 0;
	48	unsigned int target = 0;
	49	unsigned int tupdate = 0;
	50	unsigned int alpha = 0;
	51	unsigned int beta = 0;
	52	int ecn = -1;
	53	int bytemode = -1;
	54	struct rtattr *tail;
	55
	56	while (argc > 0) {
	57	if (strcmp(*argv, "limit") == 0) {
	58	NEXT_ARG();
	59	if (get_unsigned(&limit, *argv, 0)) {
	60	fprintf(stderr, "Illegal \"limit\"\n");
	61	return -1;
	62	}
	63	} else if (strcmp(*argv, "target") == 0) {
	64	NEXT_ARG();
65	if (get_time(&target, *argv)) {
66	fprintf(stderr, "Illegal \"target\"\n");
67	return -1;
68	}
69	} else if (strcmp(*argv, "tupdate") == 0) {
70	NEXT_ARG();
71	if (get_time(&tupdate, *argv)) {
72	fprintf(stderr, "Illegal \"tupdate\"\n");
73	return -1;
74	}
75	} else if (strcmp(*argv, "alpha") == 0) {
76	NEXT_ARG();
77	if (get_unsigned(&alpha, *argv, 0) \|\|
78	(alpha > ALPHA_MAX) \|\| (alpha < ALPHA_MIN)) {
79	fprintf(stderr, "Illegal \"alpha\"\n");
80	return -1;
81	}
82	} else if (strcmp(*argv, "beta") == 0) {
83	NEXT_ARG();
84	if (get_unsigned(&beta, *argv, 0) \|\|
85	(beta > BETA_MAX) \|\| (beta < BETA_MIN)) {
86	fprintf(stderr, "Illegal \"beta\"\n");
87	return -1;
88	}
89	} else if (strcmp(*argv, "ecn") == 0) {
90	ecn = 1;
91	} else if (strcmp(*argv, "noecn") == 0) {
92	ecn = 0;
93	} else if (strcmp(*argv, "bytemode") == 0) {
94	bytemode = 1;
95	} else if (strcmp(*argv, "nobytemode") == 0) {
96	bytemode = 0;
97	} else if (strcmp(*argv, "help") == 0) {
98	explain();
99	return -1;
100	} else {
101	fprintf(stderr, "What is \"%s\"?\n", *argv);
102	explain();
103	return -1;
104	}
105	argc--;
106	argv++;
107	}
108
109	tail = NLMSG_TAIL(n);
110	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
111	if (limit)
112	addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
113	if (tupdate)
114	addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
115	if (target)
116	addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
117	if (alpha)
118	addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
119	if (beta)
120	addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
121	if (ecn != -1)
122	addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
123	if (bytemode != -1)
124	addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode,
125	sizeof(bytemode));
126
127	tail->rta_len = (void )NLMSG_TAIL(n) - (void )tail;
128	return 0;
129	}
130
131	static int pie_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
132	{
133	struct rtattr *tb[TCA_PIE_MAX + 1];
134	unsigned int limit;
135	unsigned int tupdate;
136	unsigned int target;
137	unsigned int alpha;
138	unsigned int beta;
32a121cb SH	139	unsigned int ecn;
	140	unsigned int bytemode;
	141
80dd880d VS	142	SPRINT_BUF(b1);
	143
	144	if (opt == NULL)
	145	return 0;
	146
	147	parse_rtattr_nested(tb, TCA_PIE_MAX, opt);
	148
	149	if (tb[TCA_PIE_LIMIT] &&
	150	RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
	151	limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]);
	152	fprintf(f, "limit %up ", limit);
	153	}
	154	if (tb[TCA_PIE_TARGET] &&
	155	RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
	156	target = rta_getattr_u32(tb[TCA_PIE_TARGET]);
	157	fprintf(f, "target %s ", sprint_time(target, b1));
	158	}
	159	if (tb[TCA_PIE_TUPDATE] &&
	160	RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
	161	tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]);
	162	fprintf(f, "tupdate %s ", sprint_time(tupdate, b1));
	163	}
	164	if (tb[TCA_PIE_ALPHA] &&
	165	RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
	166	alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]);
	167	fprintf(f, "alpha %u ", alpha);
	168	}
	169	if (tb[TCA_PIE_BETA] &&
	170	RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
	171	beta = rta_getattr_u32(tb[TCA_PIE_BETA]);
	172	fprintf(f, "beta %u ", beta);
	173	}
	174
	175	if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
	176	ecn = rta_getattr_u32(tb[TCA_PIE_ECN]);
	177	if (ecn)
	178	fprintf(f, "ecn ");
	179	}
	180
	181	if (tb[TCA_PIE_BYTEMODE] &&
	182	RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
	183	bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]);
	184	if (bytemode)
	185	fprintf(f, "bytemode ");
	186	}
	187
	188	return 0;
	189	}
	190
	191	static int pie_print_xstats(struct qdisc_util qu, FILE f,
	192	struct rtattr *xstats)
	193	{
	194	struct tc_pie_xstats *st;
	195
	196	if (xstats == NULL)
	197	return 0;
	198
	199	if (RTA_PAYLOAD(xstats) < sizeof(*st))
	200	return -1;
	201
	202	st = RTA_DATA(xstats);
	203	/prob is returned as a fracion of maximum integer value /
	204	fprintf(f, "prob %f delay %uus avg_dq_rate %u\n",
	205	(double)st->prob / (double)0xffffffff, st->delay,
206	st->avg_dq_rate);
207	fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n",
208	st->packets_in, st->overlimit, st->dropped, st->maxq,
209	st->ecn_mark);
210	return 0;
211
212	}
213
214	struct qdisc_util pie_qdisc_util = {
215	.id = "pie",
216	.parse_qopt = pie_parse_opt,
217	.print_qopt = pie_print_opt,
218	.print_xstats = pie_print_xstats,
219	};