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
26static void explain(void)
27{
28	fprintf(stderr, "Usage: ... <[p|b]fifo | pfifo_head_drop> [ limit NUMBER ]\n");
29}
30
31static 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	memset(&opt, 0, sizeof(opt));
36
37	while (argc > 0) {
38		if (strcmp(*argv, "limit") == 0) {
39			NEXT_ARG();
40			if (get_size(&opt.limit, *argv)) {
41				fprintf(stderr, "Illegal \"limit\"\n");
42				return -1;
43			}
44			ok++;
45		} else if (strcmp(*argv, "help") == 0) {
46			explain();
47			return -1;
48		} else {
49			fprintf(stderr, "What is \"%s\"?\n", *argv);
50			explain();
51			return -1;
52		}
53		argc--; argv++;
54	}
55
56	if (ok)
57		addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
58	return 0;
59}
60
61static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
62{
63	struct tc_fifo_qopt *qopt;
64
65	if (opt == NULL)
66		return 0;
67
68	if (RTA_PAYLOAD(opt)  < sizeof(*qopt))
69		return -1;
70	qopt = RTA_DATA(opt);
71	if (strcmp(qu->id, "bfifo") == 0) {
72		SPRINT_BUF(b1);
73		fprintf(f, "limit %s", sprint_size(qopt->limit, b1));
74	} else
75		fprintf(f, "limit %up", qopt->limit);
76	return 0;
77}
78
79
80struct qdisc_util bfifo_qdisc_util = {
81	.id = "bfifo",
82	.parse_qopt = fifo_parse_opt,
83	.print_qopt = fifo_print_opt,
84};
85
86struct qdisc_util pfifo_qdisc_util = {
87	.id = "pfifo",
88	.parse_qopt = fifo_parse_opt,
89	.print_qopt = fifo_print_opt,
90};
91
92struct qdisc_util pfifo_head_drop_qdisc_util = {
93	.id = "pfifo_head_drop",
94	.parse_qopt = fifo_parse_opt,
95	.print_qopt = fifo_print_opt,
96};
97
98extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt);
99struct qdisc_util pfifo_fast_qdisc_util = {
100	.id = "pfifo_fast",
101	.print_qopt = prio_print_opt,
102};
103