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		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
90call_driver_close:
91	usbip_vhci_driver_close();
92
93	return ret;
94}
95
96int 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
120err_out:
121	usbip_detach_usage();
122out:
123	return ret;
124}
125