1/*
2 * q_prio.c		PRIO.
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 *
9 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <syslog.h>
17#include <fcntl.h>
18#include <sys/socket.h>
19#include <netinet/in.h>
20#include <arpa/inet.h>
21#include <string.h>
22
23#include "utils.h"
24#include "tc_util.h"
25
26static void explain(void)
27{
28	fprintf(stderr, "Usage: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
29}
30
31static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
32{
33	int pmap_mode = 0;
34	int idx = 0;
35	struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
36	struct rtattr *nest;
37	unsigned char mq = 0;
38
39	while (argc > 0) {
40		if (strcmp(*argv, "bands") == 0) {
41			if (pmap_mode)
42				explain();
43			NEXT_ARG();
44			if (get_integer(&opt.bands, *argv, 10)) {
45				fprintf(stderr, "Illegal \"bands\"\n");
46				return -1;
47			}
48		} else if (strcmp(*argv, "priomap") == 0) {
49			if (pmap_mode) {
50				fprintf(stderr, "Error: duplicate priomap\n");
51				return -1;
52			}
53			pmap_mode = 1;
54		} else if (strcmp(*argv, "multiqueue") == 0) {
55			mq = 1;
56		} else if (strcmp(*argv, "help") == 0) {
57			explain();
58			return -1;
59		} else {
60			unsigned band;
61			if (!pmap_mode) {
62				fprintf(stderr, "What is \"%s\"?\n", *argv);
63				explain();
64				return -1;
65			}
66			if (get_unsigned(&band, *argv, 10)) {
67				fprintf(stderr, "Illegal \"priomap\" element\n");
68				return -1;
69			}
70			if (band >= opt.bands) {
71				fprintf(stderr, "\"priomap\" element is out of bands\n");
72				return -1;
73			}
74			if (idx > TC_PRIO_MAX) {
75				fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
76				return -1;
77			}
78			opt.priomap[idx++] = band;
79		}
80		argc--; argv++;
81	}
82
83/*
84	if (pmap_mode) {
85		for (; idx < TC_PRIO_MAX; idx++)
86			opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
87	}
88*/
89	nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
90	if (mq)
91		addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
92	addattr_nest_compat_end(n, nest);
93	return 0;
94}
95
96int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
97{
98	int i;
99	struct tc_prio_qopt *qopt;
100	struct rtattr *tb[TCA_PRIO_MAX+1];
101
102	if (opt == NULL)
103		return 0;
104
105	if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
106					sizeof(*qopt)))
107                return -1;
108
109	fprintf(f, "bands %u priomap ", qopt->bands);
110	for (i=0; i<=TC_PRIO_MAX; i++)
111		fprintf(f, " %d", qopt->priomap[i]);
112
113	if (tb[TCA_PRIO_MQ])
114		fprintf(f, " multiqueue: %s ",
115			rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
116
117	return 0;
118}
119
120struct qdisc_util prio_qdisc_util = {
121	.id	 	= "prio",
122	.parse_qopt	= prio_parse_opt,
123	.print_qopt	= prio_print_opt,
124};
125