1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
4 * 2005-2007 Takahiro Hirofuchi
5 */
6
7 #include <ctype.h>
8 #include <limits.h>
9 #include <stdint.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13
14 #include <getopt.h>
15 #include <unistd.h>
16
17 #include "vhci_driver.h"
18 #include "usbip_common.h"
19 #include "usbip_network.h"
20 #include "usbip.h"
21
22 static const char usbip_detach_usage_string[] =
23 "usbip detach <args>\n"
24 " -p, --port=<port> " USBIP_VHCI_DRV_NAME
25 " port the device is on\n";
26
usbip_detach_usage(void)27 void usbip_detach_usage(void)
28 {
29 printf("usage: %s", usbip_detach_usage_string);
30 }
31
detach_port(char * port)32 static int detach_port(char *port)
33 {
34 int ret = 0;
35 uint8_t portnum;
36 char path[PATH_MAX+1];
37 int i;
38 struct usbip_imported_device *idev;
39 int found = 0;
40
41 unsigned int port_len = strlen(port);
42
43 for (unsigned int i = 0; i < port_len; i++)
44 if (!isdigit(port[i])) {
45 err("invalid port %s", port);
46 return -1;
47 }
48
49 portnum = atoi(port);
50
51 ret = usbip_vhci_driver_open();
52 if (ret < 0) {
53 err("open vhci_driver");
54 return -1;
55 }
56
57 /* check for invalid port */
58 for (i = 0; i < vhci_driver->nports; i++) {
59 idev = &vhci_driver->idev[i];
60
61 if (idev->port == portnum) {
62 found = 1;
63 if (idev->status != VDEV_ST_NULL)
64 break;
65 info("Port %d is already detached!\n", idev->port);
66 goto call_driver_close;
67 }
68 }
69
70 if (!found) {
71 err("Invalid port %s > maxports %d",
72 port, vhci_driver->nports);
73 goto call_driver_close;
74 }
75
76 /* remove the port state file */
77 snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum);
78
79 remove(path);
80 rmdir(VHCI_STATE_PATH);
81
82 ret = usbip_vhci_detach_device(portnum);
83 if (ret < 0) {
84 ret = -1;
85 err("Port %d detach request failed!\n", portnum);
86 goto call_driver_close;
87 }
88 info("Port %d is now detached!\n", portnum);
89
90 call_driver_close:
91 usbip_vhci_driver_close();
92
93 return ret;
94 }
95
usbip_detach(int argc,char * argv[])96 int usbip_detach(int argc, char *argv[])
97 {
98 static const struct option opts[] = {
99 { "port", required_argument, NULL, 'p' },
100 { NULL, 0, NULL, 0 }
101 };
102 int opt;
103 int ret = -1;
104
105 for (;;) {
106 opt = getopt_long(argc, argv, "p:", opts, NULL);
107
108 if (opt == -1)
109 break;
110
111 switch (opt) {
112 case 'p':
113 ret = detach_port(optarg);
114 goto out;
115 default:
116 goto err_out;
117 }
118 }
119
120 err_out:
121 usbip_detach_usage();
122 out:
123 return ret;
124 }
125