vale-ctl.c revision 260700 
1/*
2 * Copyright (C) 2013-2014 Michio Honda. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *   1. Redistributions of source code must retain the above copyright
8 *      notice, this list of conditions and the following disclaimer.
9 *   2. Redistributions in binary form must reproduce the above copyright
10 *      notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26/* $FreeBSD: head/tools/tools/netmap/vale-ctl.c 260700 2014-01-16 00:20:42Z luigi $ */
27
28#include <errno.h>
29#include <stdio.h>
30#include <inttypes.h>	/* PRI* macros */
31#include <string.h>	/* strcmp */
32#include <fcntl.h>	/* open */
33#include <unistd.h>	/* close */
34#include <sys/ioctl.h>	/* ioctl */
35#include <sys/param.h>
36#include <net/if.h>	/* ifreq */
37#include <net/netmap.h>
38#include <net/netmap_user.h>
39#include <libgen.h>	/* basename */
40
41/* debug support */
42#define ND(format, ...)	do {} while(0)
43#define D(format, ...)					\
44	fprintf(stderr, "%s [%d] " format "\n",		\
45	__FUNCTION__, __LINE__, ##__VA_ARGS__)
46
47static int
48bdg_ctl(const char *name, int nr_cmd, int nr_arg)
49{
50	struct nmreq nmr;
51	int error = 0;
52	int fd = open("/dev/netmap", O_RDWR);
53
54	if (fd == -1) {
55		D("Unable to open /dev/netmap");
56		return -1;
57	}
58
59	bzero(&nmr, sizeof(nmr));
60	nmr.nr_version = NETMAP_API;
61	if (name != NULL) /* might be NULL */
62		strncpy(nmr.nr_name, name, sizeof(nmr.nr_name));
63	nmr.nr_cmd = nr_cmd;
64
65	switch (nr_cmd) {
66	case NETMAP_BDG_ATTACH:
67	case NETMAP_BDG_DETACH:
68		if (nr_arg && nr_arg != NETMAP_BDG_HOST)
69			nr_arg = 0;
70		nmr.nr_arg1 = nr_arg;
71		error = ioctl(fd, NIOCREGIF, &nmr);
72		if (error == -1) {
73			ND("Unable to %s %s to the bridge", nr_cmd ==
74			    NETMAP_BDG_DETACH?"detach":"attach", name);
75			perror(name);
76		} else
77			ND("Success to %s %s to the bridge", nr_cmd ==
78			    NETMAP_BDG_DETACH?"detach":"attach", name);
79		break;
80
81	case NETMAP_BDG_LIST:
82		if (strlen(nmr.nr_name)) { /* name to bridge/port info */
83			error = ioctl(fd, NIOCGINFO, &nmr);
84			if (error) {
85				ND("Unable to obtain info for %s", name);
86				perror(name);
87			} else
88				D("%s at bridge:%d port:%d", name, nmr.nr_arg1,
89				    nmr.nr_arg2);
90			break;
91		}
92
93		/* scan all the bridges and ports */
94		nmr.nr_arg1 = nmr.nr_arg2 = 0;
95		for (; !ioctl(fd, NIOCGINFO, &nmr); nmr.nr_arg2++) {
96			D("bridge:%d port:%d %s", nmr.nr_arg1, nmr.nr_arg2,
97			    nmr.nr_name);
98			nmr.nr_name[0] = '\0';
99		}
100
101		break;
102
103	default: /* GINFO */
104		nmr.nr_cmd = nmr.nr_arg1 = nmr.nr_arg2 = 0;
105		error = ioctl(fd, NIOCGINFO, &nmr);
106		if (error) {
107			ND("Unable to get if info for %s", name);
108			perror(name);
109		} else
110			D("%s: %d queues.", name, nmr.nr_rx_rings);
111		break;
112	}
113	close(fd);
114	return error;
115}
116
117int
118main(int argc, char *argv[])
119{
120	int ch, nr_cmd = 0, nr_arg = 0;
121	const char *command = basename(argv[0]);
122	char *name = NULL;
123
124	if (argc > 3) {
125usage:
126		fprintf(stderr,
127			"Usage:\n"
128			"%s arguments\n"
129			"\t-g interface	interface name to get info\n"
130			"\t-d interface	interface name to be detached\n"
131			"\t-a interface	interface name to be attached\n"
132			"\t-h interface	interface name to be attached with the host stack\n"
133			"\t-l list all or specified bridge's interfaces (default)\n"
134			"", command);
135		return 0;
136	}
137
138	while ((ch = getopt(argc, argv, "d:a:h:g:l")) != -1) {
139		name = optarg; /* default */
140		switch (ch) {
141		default:
142			fprintf(stderr, "bad option %c %s", ch, optarg);
143			goto usage;
144		case 'd':
145			nr_cmd = NETMAP_BDG_DETACH;
146			break;
147		case 'a':
148			nr_cmd = NETMAP_BDG_ATTACH;
149			break;
150		case 'h':
151			nr_cmd = NETMAP_BDG_ATTACH;
152			nr_arg = NETMAP_BDG_HOST;
153			break;
154		case 'g':
155			nr_cmd = 0;
156			break;
157		case 'l':
158			nr_cmd = NETMAP_BDG_LIST;
159			if (optind < argc && argv[optind][0] == '-')
160				name = NULL;
161			break;
162		}
163		if (optind != argc) {
164			// fprintf(stderr, "optind %d argc %d\n", optind, argc);
165			goto usage;
166		}
167	}
168	if (argc == 1)
169		nr_cmd = NETMAP_BDG_LIST;
170	return bdg_ctl(name, nr_cmd, nr_arg) ? 1 : 0;
171}
172