1 /*
2 * q_rr.c RR.
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: PJ Waskiewicz, <peter.p.waskiewicz.jr@intel.com>
10 * Original Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> (from PRIO)
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
explain(void)26 static void explain(void)
27 {
28 fprintf(stderr, "Usage: ... rr bands NUMBER priomap P1 P2... [multiqueue]\n");
29 }
30
31 #define usage() return(-1)
32
rr_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)33 static int rr_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
34 {
35 int ok = 0;
36 int pmap_mode = 0;
37 int idx = 0;
38 struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
39 struct rtattr *nest;
40 unsigned char mq = 0;
41
42 while (argc > 0) {
43 if (strcmp(*argv, "bands") == 0) {
44 if (pmap_mode)
45 explain();
46 NEXT_ARG();
47 if (get_integer(&opt.bands, *argv, 10)) {
48 fprintf(stderr, "Illegal \"bands\"\n");
49 return -1;
50 }
51 ok++;
52 } else if (strcmp(*argv, "priomap") == 0) {
53 if (pmap_mode) {
54 fprintf(stderr, "Error: duplicate priomap\n");
55 return -1;
56 }
57 pmap_mode = 1;
58 } else if (strcmp(*argv, "help") == 0) {
59 explain();
60 return -1;
61 } else if (strcmp(*argv, "multiqueue") == 0) {
62 mq = 1;
63 } else {
64 unsigned band;
65 if (!pmap_mode) {
66 fprintf(stderr, "What is \"%s\"?\n", *argv);
67 explain();
68 return -1;
69 }
70 if (get_unsigned(&band, *argv, 10)) {
71 fprintf(stderr, "Illegal \"priomap\" element\n");
72 return -1;
73 }
74 if (band > opt.bands) {
75 fprintf(stderr, "\"priomap\" element is out of bands\n");
76 return -1;
77 }
78 if (idx > TC_PRIO_MAX) {
79 fprintf(stderr, "\"priomap\" index > TC_RR_MAX=%u\n", TC_PRIO_MAX);
80 return -1;
81 }
82 opt.priomap[idx++] = band;
83 }
84 argc--; argv++;
85 }
86
87 nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
88 if (mq)
89 addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
90 addattr_nest_compat_end(n, nest);
91 return 0;
92 }
93
rr_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)94 int rr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
95 {
96 int i;
97 struct tc_prio_qopt *qopt;
98 struct rtattr *tb[TCA_PRIO_MAX + 1];
99
100 if (opt == NULL)
101 return 0;
102
103 if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
104 sizeof(*qopt)))
105 return -1;
106
107 fprintf(f, "bands %u priomap ", qopt->bands);
108 for (i=0; i <= TC_PRIO_MAX; i++)
109 fprintf(f, " %d", qopt->priomap[i]);
110
111 if (tb[TCA_PRIO_MQ])
112 fprintf(f, " multiqueue: %s ",
113 *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "on" : "off");
114
115 return 0;
116 }
117
118 struct qdisc_util rr_qdisc_util = {
119 .id = "rr",
120 .parse_qopt = rr_parse_opt,
121 .print_qopt = rr_print_opt,
122 };
123