1 /*
2 * q_fifo.c FIFO.
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
explain(void)26 static void explain(void)
27 {
28 fprintf(stderr, "Usage: ... <[p|b]fifo | pfifo_head_drop> [ limit NUMBER ]\n");
29 }
30
fifo_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)31 static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
32 {
33 int ok = 0;
34 struct tc_fifo_qopt opt = {};
35
36 while (argc > 0) {
37 if (strcmp(*argv, "limit") == 0) {
38 NEXT_ARG();
39 if (get_size(&opt.limit, *argv)) {
40 fprintf(stderr, "%s: Illegal value for \"limit\": \"%s\"\n", qu->id, *argv);
41 return -1;
42 }
43 ok++;
44 } else if (strcmp(*argv, "help") == 0) {
45 explain();
46 return -1;
47 } else {
48 fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv);
49 explain();
50 return -1;
51 }
52 argc--; argv++;
53 }
54
55 if (ok)
56 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
57 return 0;
58 }
59
fifo_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)60 static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
61 {
62 struct tc_fifo_qopt *qopt;
63
64 if (opt == NULL)
65 return 0;
66
67 if (RTA_PAYLOAD(opt) < sizeof(*qopt))
68 return -1;
69 qopt = RTA_DATA(opt);
70 if (strcmp(qu->id, "bfifo") == 0) {
71 SPRINT_BUF(b1);
72 fprintf(f, "limit %s", sprint_size(qopt->limit, b1));
73 } else
74 fprintf(f, "limit %up", qopt->limit);
75 return 0;
76 }
77
78
79 struct qdisc_util bfifo_qdisc_util = {
80 .id = "bfifo",
81 .parse_qopt = fifo_parse_opt,
82 .print_qopt = fifo_print_opt,
83 };
84
85 struct qdisc_util pfifo_qdisc_util = {
86 .id = "pfifo",
87 .parse_qopt = fifo_parse_opt,
88 .print_qopt = fifo_print_opt,
89 };
90
91 struct qdisc_util pfifo_head_drop_qdisc_util = {
92 .id = "pfifo_head_drop",
93 .parse_qopt = fifo_parse_opt,
94 .print_qopt = fifo_print_opt,
95 };
96
97 extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt);
98 struct qdisc_util pfifo_fast_qdisc_util = {
99 .id = "pfifo_fast",
100 .print_qopt = prio_print_opt,
101 };
102