tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22static 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
27void usbip_detach_usage(void)
28{
29 printf("usage: %s", usbip_detach_usage_string);
30}
31
32static 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 (is vhci_hcd loaded?)");
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 ret = -1;
72 err("Invalid port %s > maxports %d",
73 port, vhci_driver->nports);
74 goto call_driver_close;
75 }
76
77 /* remove the port state file */
78 snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum);
79
80 remove(path);
81 rmdir(VHCI_STATE_PATH);
82
83 ret = usbip_vhci_detach_device(portnum);
84 if (ret < 0) {
85 ret = -1;
86 err("Port %d detach request failed!\n", portnum);
87 goto call_driver_close;
88 }
89 info("Port %d is now detached!\n", portnum);
90
91call_driver_close:
92 usbip_vhci_driver_close();
93
94 return ret;
95}
96
97int usbip_detach(int argc, char *argv[])
98{
99 static const struct option opts[] = {
100 { "port", required_argument, NULL, 'p' },
101 { NULL, 0, NULL, 0 }
102 };
103 int opt;
104 int ret = -1;
105
106 for (;;) {
107 opt = getopt_long(argc, argv, "p:", opts, NULL);
108
109 if (opt == -1)
110 break;
111
112 switch (opt) {
113 case 'p':
114 ret = detach_port(optarg);
115 goto out;
116 default:
117 goto err_out;
118 }
119 }
120
121err_out:
122 usbip_detach_usage();
123out:
124 return ret;
125}