1 /*
2 * Copyright (c) 2008, XenSource Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * 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 * * Neither the name of XenSource Inc. nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
20 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 #include <stdio.h>
29 #include <errno.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <getopt.h>
33
34 #include "tap-ctl.h"
35
36 int
tap_ctl_attach(const int id,const int minor)37 tap_ctl_attach(const int id, const int minor)
38 {
39 int err;
40 tapdisk_message_t message;
41
42 memset(&message, 0, sizeof(message));
43 message.type = TAPDISK_MESSAGE_ATTACH;
44 message.cookie = minor;
45
46 err = tap_ctl_connect_send_and_receive(id, &message, 5);
47 if (err)
48 return err;
49
50 if (message.type == TAPDISK_MESSAGE_ATTACH_RSP) {
51 err = message.u.response.error;
52 if (err)
53 EPRINTF("attach failed: %d\n", err);
54 } else {
55 EPRINTF("got unexpected result '%s' from %d\n",
56 tapdisk_message_name(message.type), id);
57 err = EINVAL;
58 }
59
60 return err;
61 }
62