Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 2016, Citrix Systems, Inc.
3 : : *
4 : : * All rights reserved.
5 : : *
6 : : * Redistribution and use in source and binary forms, with or without
7 : : * modification, are permitted provided that the following conditions are met:
8 : : *
9 : : * 1. Redistributions of source code must retain the above copyright
10 : : * notice, this list of conditions and the following disclaimer.
11 : : * 2. Redistributions in binary form must reproduce the above copyright
12 : : * notice, this list of conditions and the following disclaimer in the
13 : : * documentation and/or other materials provided with the distribution.
14 : : * 3. Neither the name of the copyright holder nor the names of its
15 : : * contributors may be used to endorse or promote products derived from
16 : : * this software without specific prior written permission.
17 : : *
18 : : * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 : : * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 : : * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 : : * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
22 : : * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 : : * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 : : * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 : : * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 : : * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 : : * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 : : * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 : : */
30 : :
31 : : #ifdef HAVE_CONFIG_H
32 : : #include "config.h"
33 : : #endif
34 : :
35 : : #include <stdio.h>
36 : : #include <errno.h>
37 : : #include <fcntl.h>
38 : : #include <stdlib.h>
39 : : #include <unistd.h>
40 : : #include <getopt.h>
41 : : #include <sys/ioctl.h>
42 : :
43 : : #include "tap-ctl.h"
44 : : #include "blktap2.h"
45 : :
46 : : int
47 : 5 : tap_ctl_free(const int minor)
48 : : {
49 : : int fd, err;
50 : :
51 : 5 : fd = open(BLKTAP2_CONTROL_DEVICE, O_RDONLY);
52 [ + + ]: 5 : if (fd == -1) {
53 : 1 : EPRINTF("failed to open control device: %d\n", errno);
54 : 1 : return errno;
55 : : }
56 : :
57 : 4 : err = ioctl(fd, BLKTAP2_IOCTL_FREE_TAP, minor);
58 [ + + ]: 4 : err = (err == -1) ? -errno : 0;
59 : 4 : close(fd);
60 : :
61 : 4 : return err;
62 : : }
|