Loading...
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2003-2008 Takahiro Hirofuchi
4 * Copyright (C) 2015-2016 Nobuo Iwata
5 */
6
7#include <linux/kthread.h>
8#include <linux/file.h>
9#include <linux/net.h>
10#include <linux/platform_device.h>
11#include <linux/slab.h>
12
13/* Hardening for Spectre-v1 */
14#include <linux/nospec.h>
15
16#include "usbip_common.h"
17#include "vhci.h"
18
19/* TODO: refine locking ?*/
20
21/*
22 * output example:
23 * hub port sta spd dev sockfd local_busid
24 * hs 0000 004 000 00000000 000003 1-2.3
25 * ................................................
26 * ss 0008 004 000 00000000 000004 2-3.4
27 * ................................................
28 *
29 * Output includes socket fd instead of socket pointer address to avoid
30 * leaking kernel memory address in:
31 * /sys/devices/platform/vhci_hcd.0/status and in debug output.
32 * The socket pointer address is not used at the moment and it was made
33 * visible as a convenient way to find IP address from socket pointer
34 * address by looking up /proc/net/{tcp,tcp6}. As this opens a security
35 * hole, the change is made to use sockfd instead.
36 *
37 */
38static void port_show_vhci(char **out, int hub, int port, struct vhci_device *vdev)
39{
40 if (hub == HUB_SPEED_HIGH)
41 *out += sprintf(*out, "hs %04u %03u ",
42 port, vdev->ud.status);
43 else /* hub == HUB_SPEED_SUPER */
44 *out += sprintf(*out, "ss %04u %03u ",
45 port, vdev->ud.status);
46
47 if (vdev->ud.status == VDEV_ST_USED) {
48 *out += sprintf(*out, "%03u %08x ",
49 vdev->speed, vdev->devid);
50 *out += sprintf(*out, "%06u %s",
51 vdev->ud.sockfd,
52 dev_name(&vdev->udev->dev));
53
54 } else {
55 *out += sprintf(*out, "000 00000000 ");
56 *out += sprintf(*out, "000000 0-0");
57 }
58
59 *out += sprintf(*out, "\n");
60}
61
62/* Sysfs entry to show port status */
63static ssize_t status_show_vhci(int pdev_nr, char *out)
64{
65 struct platform_device *pdev = vhcis[pdev_nr].pdev;
66 struct vhci *vhci;
67 struct usb_hcd *hcd;
68 struct vhci_hcd *vhci_hcd;
69 char *s = out;
70 int i;
71 unsigned long flags;
72
73 if (!pdev || !out) {
74 usbip_dbg_vhci_sysfs("show status error\n");
75 return 0;
76 }
77
78 hcd = platform_get_drvdata(pdev);
79 vhci_hcd = hcd_to_vhci_hcd(hcd);
80 vhci = vhci_hcd->vhci;
81
82 spin_lock_irqsave(&vhci->lock, flags);
83
84 for (i = 0; i < VHCI_HC_PORTS; i++) {
85 struct vhci_device *vdev = &vhci->vhci_hcd_hs->vdev[i];
86
87 spin_lock(&vdev->ud.lock);
88 port_show_vhci(&out, HUB_SPEED_HIGH,
89 pdev_nr * VHCI_PORTS + i, vdev);
90 spin_unlock(&vdev->ud.lock);
91 }
92
93 for (i = 0; i < VHCI_HC_PORTS; i++) {
94 struct vhci_device *vdev = &vhci->vhci_hcd_ss->vdev[i];
95
96 spin_lock(&vdev->ud.lock);
97 port_show_vhci(&out, HUB_SPEED_SUPER,
98 pdev_nr * VHCI_PORTS + VHCI_HC_PORTS + i, vdev);
99 spin_unlock(&vdev->ud.lock);
100 }
101
102 spin_unlock_irqrestore(&vhci->lock, flags);
103
104 return out - s;
105}
106
107static ssize_t status_show_not_ready(int pdev_nr, char *out)
108{
109 char *s = out;
110 int i = 0;
111
112 for (i = 0; i < VHCI_HC_PORTS; i++) {
113 out += sprintf(out, "hs %04u %03u ",
114 (pdev_nr * VHCI_PORTS) + i,
115 VDEV_ST_NOTASSIGNED);
116 out += sprintf(out, "000 00000000 0000000000000000 0-0");
117 out += sprintf(out, "\n");
118 }
119
120 for (i = 0; i < VHCI_HC_PORTS; i++) {
121 out += sprintf(out, "ss %04u %03u ",
122 (pdev_nr * VHCI_PORTS) + VHCI_HC_PORTS + i,
123 VDEV_ST_NOTASSIGNED);
124 out += sprintf(out, "000 00000000 0000000000000000 0-0");
125 out += sprintf(out, "\n");
126 }
127 return out - s;
128}
129
130static int status_name_to_id(const char *name)
131{
132 char *c;
133 long val;
134 int ret;
135
136 c = strchr(name, '.');
137 if (c == NULL)
138 return 0;
139
140 ret = kstrtol(c+1, 10, &val);
141 if (ret < 0)
142 return ret;
143
144 return val;
145}
146
147static ssize_t status_show(struct device *dev,
148 struct device_attribute *attr, char *out)
149{
150 char *s = out;
151 int pdev_nr;
152
153 out += sprintf(out,
154 "hub port sta spd dev sockfd local_busid\n");
155
156 pdev_nr = status_name_to_id(attr->attr.name);
157 if (pdev_nr < 0)
158 out += status_show_not_ready(pdev_nr, out);
159 else
160 out += status_show_vhci(pdev_nr, out);
161
162 return out - s;
163}
164
165static ssize_t nports_show(struct device *dev, struct device_attribute *attr,
166 char *out)
167{
168 char *s = out;
169
170 /*
171 * Half the ports are for SPEED_HIGH and half for SPEED_SUPER,
172 * thus the * 2.
173 */
174 out += sprintf(out, "%d\n", VHCI_PORTS * vhci_num_controllers);
175 return out - s;
176}
177static DEVICE_ATTR_RO(nports);
178
179/* Sysfs entry to shutdown a virtual connection */
180static int vhci_port_disconnect(struct vhci_hcd *vhci_hcd, __u32 rhport)
181{
182 struct vhci_device *vdev = &vhci_hcd->vdev[rhport];
183 struct vhci *vhci = vhci_hcd->vhci;
184 unsigned long flags;
185
186 usbip_dbg_vhci_sysfs("enter\n");
187
188 mutex_lock(&vdev->ud.sysfs_lock);
189
190 /* lock */
191 spin_lock_irqsave(&vhci->lock, flags);
192 spin_lock(&vdev->ud.lock);
193
194 if (vdev->ud.status == VDEV_ST_NULL) {
195 pr_err("not connected %d\n", vdev->ud.status);
196
197 /* unlock */
198 spin_unlock(&vdev->ud.lock);
199 spin_unlock_irqrestore(&vhci->lock, flags);
200 mutex_unlock(&vdev->ud.sysfs_lock);
201
202 return -EINVAL;
203 }
204
205 /* unlock */
206 spin_unlock(&vdev->ud.lock);
207 spin_unlock_irqrestore(&vhci->lock, flags);
208
209 usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
210
211 mutex_unlock(&vdev->ud.sysfs_lock);
212
213 return 0;
214}
215
216static int valid_port(__u32 *pdev_nr, __u32 *rhport)
217{
218 if (*pdev_nr >= vhci_num_controllers) {
219 pr_err("pdev %u\n", *pdev_nr);
220 return 0;
221 }
222 *pdev_nr = array_index_nospec(*pdev_nr, vhci_num_controllers);
223
224 if (*rhport >= VHCI_HC_PORTS) {
225 pr_err("rhport %u\n", *rhport);
226 return 0;
227 }
228 *rhport = array_index_nospec(*rhport, VHCI_HC_PORTS);
229
230 return 1;
231}
232
233static ssize_t detach_store(struct device *dev, struct device_attribute *attr,
234 const char *buf, size_t count)
235{
236 __u32 port = 0, pdev_nr = 0, rhport = 0;
237 struct usb_hcd *hcd;
238 struct vhci_hcd *vhci_hcd;
239 int ret;
240
241 if (kstrtoint(buf, 10, &port) < 0)
242 return -EINVAL;
243
244 pdev_nr = port_to_pdev_nr(port);
245 rhport = port_to_rhport(port);
246
247 if (!valid_port(&pdev_nr, &rhport))
248 return -EINVAL;
249
250 hcd = platform_get_drvdata(vhcis[pdev_nr].pdev);
251 if (hcd == NULL) {
252 dev_err(dev, "port is not ready %u\n", port);
253 return -EAGAIN;
254 }
255
256 usbip_dbg_vhci_sysfs("rhport %d\n", rhport);
257
258 if ((port / VHCI_HC_PORTS) % 2)
259 vhci_hcd = hcd_to_vhci_hcd(hcd)->vhci->vhci_hcd_ss;
260 else
261 vhci_hcd = hcd_to_vhci_hcd(hcd)->vhci->vhci_hcd_hs;
262
263 ret = vhci_port_disconnect(vhci_hcd, rhport);
264 if (ret < 0)
265 return -EINVAL;
266
267 usbip_dbg_vhci_sysfs("Leave\n");
268
269 return count;
270}
271static DEVICE_ATTR_WO(detach);
272
273static int valid_args(__u32 *pdev_nr, __u32 *rhport,
274 enum usb_device_speed speed)
275{
276 if (!valid_port(pdev_nr, rhport)) {
277 return 0;
278 }
279
280 switch (speed) {
281 case USB_SPEED_LOW:
282 case USB_SPEED_FULL:
283 case USB_SPEED_HIGH:
284 case USB_SPEED_WIRELESS:
285 case USB_SPEED_SUPER:
286 break;
287 default:
288 pr_err("Failed attach request for unsupported USB speed: %s\n",
289 usb_speed_string(speed));
290 return 0;
291 }
292
293 return 1;
294}
295
296/* Sysfs entry to establish a virtual connection */
297/*
298 * To start a new USB/IP attachment, a userland program needs to setup a TCP
299 * connection and then write its socket descriptor with remote device
300 * information into this sysfs file.
301 *
302 * A remote device is virtually attached to the root-hub port of @rhport with
303 * @speed. @devid is embedded into a request to specify the remote device in a
304 * server host.
305 *
306 * write() returns 0 on success, else negative errno.
307 */
308static ssize_t attach_store(struct device *dev, struct device_attribute *attr,
309 const char *buf, size_t count)
310{
311 struct socket *socket;
312 int sockfd = 0;
313 __u32 port = 0, pdev_nr = 0, rhport = 0, devid = 0, speed = 0;
314 struct usb_hcd *hcd;
315 struct vhci_hcd *vhci_hcd;
316 struct vhci_device *vdev;
317 struct vhci *vhci;
318 int err;
319 unsigned long flags;
320 struct task_struct *tcp_rx = NULL;
321 struct task_struct *tcp_tx = NULL;
322
323 /*
324 * @rhport: port number of vhci_hcd
325 * @sockfd: socket descriptor of an established TCP connection
326 * @devid: unique device identifier in a remote host
327 * @speed: usb device speed in a remote host
328 */
329 if (sscanf(buf, "%u %u %u %u", &port, &sockfd, &devid, &speed) != 4)
330 return -EINVAL;
331 pdev_nr = port_to_pdev_nr(port);
332 rhport = port_to_rhport(port);
333
334 usbip_dbg_vhci_sysfs("port(%u) pdev(%d) rhport(%u)\n",
335 port, pdev_nr, rhport);
336 usbip_dbg_vhci_sysfs("sockfd(%u) devid(%u) speed(%u)\n",
337 sockfd, devid, speed);
338
339 /* check received parameters */
340 if (!valid_args(&pdev_nr, &rhport, speed))
341 return -EINVAL;
342
343 hcd = platform_get_drvdata(vhcis[pdev_nr].pdev);
344 if (hcd == NULL) {
345 dev_err(dev, "port %d is not ready\n", port);
346 return -EAGAIN;
347 }
348
349 vhci_hcd = hcd_to_vhci_hcd(hcd);
350 vhci = vhci_hcd->vhci;
351
352 if (speed == USB_SPEED_SUPER)
353 vdev = &vhci->vhci_hcd_ss->vdev[rhport];
354 else
355 vdev = &vhci->vhci_hcd_hs->vdev[rhport];
356
357 mutex_lock(&vdev->ud.sysfs_lock);
358
359 /* Extract socket from fd. */
360 socket = sockfd_lookup(sockfd, &err);
361 if (!socket) {
362 dev_err(dev, "failed to lookup sock");
363 err = -EINVAL;
364 goto unlock_mutex;
365 }
366 if (socket->type != SOCK_STREAM) {
367 dev_err(dev, "Expecting SOCK_STREAM - found %d",
368 socket->type);
369 sockfd_put(socket);
370 err = -EINVAL;
371 goto unlock_mutex;
372 }
373
374 /* create threads before locking */
375 tcp_rx = kthread_create(vhci_rx_loop, &vdev->ud, "vhci_rx");
376 if (IS_ERR(tcp_rx)) {
377 sockfd_put(socket);
378 err = -EINVAL;
379 goto unlock_mutex;
380 }
381 tcp_tx = kthread_create(vhci_tx_loop, &vdev->ud, "vhci_tx");
382 if (IS_ERR(tcp_tx)) {
383 kthread_stop(tcp_rx);
384 sockfd_put(socket);
385 err = -EINVAL;
386 goto unlock_mutex;
387 }
388
389 /* get task structs now */
390 get_task_struct(tcp_rx);
391 get_task_struct(tcp_tx);
392
393 /* now begin lock until setting vdev status set */
394 spin_lock_irqsave(&vhci->lock, flags);
395 spin_lock(&vdev->ud.lock);
396
397 if (vdev->ud.status != VDEV_ST_NULL) {
398 /* end of the lock */
399 spin_unlock(&vdev->ud.lock);
400 spin_unlock_irqrestore(&vhci->lock, flags);
401
402 sockfd_put(socket);
403 kthread_stop_put(tcp_rx);
404 kthread_stop_put(tcp_tx);
405
406 dev_err(dev, "port %d already used\n", rhport);
407 /*
408 * Will be retried from userspace
409 * if there's another free port.
410 */
411 err = -EBUSY;
412 goto unlock_mutex;
413 }
414
415 dev_info(dev, "pdev(%u) rhport(%u) sockfd(%d)\n",
416 pdev_nr, rhport, sockfd);
417 dev_info(dev, "devid(%u) speed(%u) speed_str(%s)\n",
418 devid, speed, usb_speed_string(speed));
419
420 vdev->devid = devid;
421 vdev->speed = speed;
422 vdev->ud.sockfd = sockfd;
423 vdev->ud.tcp_socket = socket;
424 vdev->ud.tcp_rx = tcp_rx;
425 vdev->ud.tcp_tx = tcp_tx;
426 vdev->ud.status = VDEV_ST_NOTASSIGNED;
427 usbip_kcov_handle_init(&vdev->ud);
428
429 spin_unlock(&vdev->ud.lock);
430 spin_unlock_irqrestore(&vhci->lock, flags);
431 /* end the lock */
432
433 wake_up_process(vdev->ud.tcp_rx);
434 wake_up_process(vdev->ud.tcp_tx);
435
436 rh_port_connect(vdev, speed);
437
438 dev_info(dev, "Device attached\n");
439
440 mutex_unlock(&vdev->ud.sysfs_lock);
441
442 return count;
443
444unlock_mutex:
445 mutex_unlock(&vdev->ud.sysfs_lock);
446 return err;
447}
448static DEVICE_ATTR_WO(attach);
449
450#define MAX_STATUS_NAME 16
451
452struct status_attr {
453 struct device_attribute attr;
454 char name[MAX_STATUS_NAME+1];
455};
456
457static struct status_attr *status_attrs;
458
459static void set_status_attr(int id)
460{
461 struct status_attr *status;
462
463 status = status_attrs + id;
464 if (id == 0)
465 strcpy(status->name, "status");
466 else
467 snprintf(status->name, MAX_STATUS_NAME+1, "status.%d", id);
468 status->attr.attr.name = status->name;
469 status->attr.attr.mode = S_IRUGO;
470 status->attr.show = status_show;
471 sysfs_attr_init(&status->attr.attr);
472}
473
474static int init_status_attrs(void)
475{
476 int id;
477
478 status_attrs = kcalloc(vhci_num_controllers, sizeof(struct status_attr),
479 GFP_KERNEL);
480 if (status_attrs == NULL)
481 return -ENOMEM;
482
483 for (id = 0; id < vhci_num_controllers; id++)
484 set_status_attr(id);
485
486 return 0;
487}
488
489static void finish_status_attrs(void)
490{
491 kfree(status_attrs);
492}
493
494struct attribute_group vhci_attr_group = {
495 .attrs = NULL,
496};
497
498int vhci_init_attr_group(void)
499{
500 struct attribute **attrs;
501 int ret, i;
502
503 attrs = kcalloc((vhci_num_controllers + 5), sizeof(struct attribute *),
504 GFP_KERNEL);
505 if (attrs == NULL)
506 return -ENOMEM;
507
508 ret = init_status_attrs();
509 if (ret) {
510 kfree(attrs);
511 return ret;
512 }
513 *attrs = &dev_attr_nports.attr;
514 *(attrs + 1) = &dev_attr_detach.attr;
515 *(attrs + 2) = &dev_attr_attach.attr;
516 *(attrs + 3) = &dev_attr_usbip_debug.attr;
517 for (i = 0; i < vhci_num_controllers; i++)
518 *(attrs + i + 4) = &((status_attrs + i)->attr.attr);
519 vhci_attr_group.attrs = attrs;
520 return 0;
521}
522
523void vhci_finish_attr_group(void)
524{
525 finish_status_attrs();
526 kfree(vhci_attr_group.attrs);
527}
1/*
2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
3 *
4 * This is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17 * USA.
18 */
19
20#include <linux/kthread.h>
21#include <linux/file.h>
22#include <linux/net.h>
23
24#include "usbip_common.h"
25#include "vhci.h"
26
27/* TODO: refine locking ?*/
28
29/* Sysfs entry to show port status */
30static ssize_t status_show(struct device *dev, struct device_attribute *attr,
31 char *out)
32{
33 char *s = out;
34 int i = 0;
35 unsigned long flags;
36
37 BUG_ON(!the_controller || !out);
38
39 spin_lock_irqsave(&the_controller->lock, flags);
40
41 /*
42 * output example:
43 * prt sta spd dev socket local_busid
44 * 000 004 000 000 c5a7bb80 1-2.3
45 * 001 004 000 000 d8cee980 2-3.4
46 *
47 * IP address can be retrieved from a socket pointer address by looking
48 * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
49 * port number and its peer IP address.
50 */
51 out += sprintf(out,
52 "prt sta spd bus dev socket local_busid\n");
53
54 for (i = 0; i < VHCI_NPORTS; i++) {
55 struct vhci_device *vdev = port_to_vdev(i);
56
57 spin_lock(&vdev->ud.lock);
58 out += sprintf(out, "%03u %03u ", i, vdev->ud.status);
59
60 if (vdev->ud.status == VDEV_ST_USED) {
61 out += sprintf(out, "%03u %08x ",
62 vdev->speed, vdev->devid);
63 out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
64 out += sprintf(out, "%s", dev_name(&vdev->udev->dev));
65
66 } else {
67 out += sprintf(out, "000 000 000 0000000000000000 0-0");
68 }
69
70 out += sprintf(out, "\n");
71 spin_unlock(&vdev->ud.lock);
72 }
73
74 spin_unlock_irqrestore(&the_controller->lock, flags);
75
76 return out - s;
77}
78static DEVICE_ATTR_RO(status);
79
80/* Sysfs entry to shutdown a virtual connection */
81static int vhci_port_disconnect(__u32 rhport)
82{
83 struct vhci_device *vdev;
84 unsigned long flags;
85
86 usbip_dbg_vhci_sysfs("enter\n");
87
88 /* lock */
89 spin_lock_irqsave(&the_controller->lock, flags);
90
91 vdev = port_to_vdev(rhport);
92
93 spin_lock(&vdev->ud.lock);
94 if (vdev->ud.status == VDEV_ST_NULL) {
95 pr_err("not connected %d\n", vdev->ud.status);
96
97 /* unlock */
98 spin_unlock(&vdev->ud.lock);
99 spin_unlock_irqrestore(&the_controller->lock, flags);
100
101 return -EINVAL;
102 }
103
104 /* unlock */
105 spin_unlock(&vdev->ud.lock);
106 spin_unlock_irqrestore(&the_controller->lock, flags);
107
108 usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
109
110 return 0;
111}
112
113static ssize_t store_detach(struct device *dev, struct device_attribute *attr,
114 const char *buf, size_t count)
115{
116 int err;
117 __u32 rhport = 0;
118
119 if (sscanf(buf, "%u", &rhport) != 1)
120 return -EINVAL;
121
122 /* check rhport */
123 if (rhport >= VHCI_NPORTS) {
124 dev_err(dev, "invalid port %u\n", rhport);
125 return -EINVAL;
126 }
127
128 err = vhci_port_disconnect(rhport);
129 if (err < 0)
130 return -EINVAL;
131
132 usbip_dbg_vhci_sysfs("Leave\n");
133
134 return count;
135}
136static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach);
137
138/* Sysfs entry to establish a virtual connection */
139static int valid_args(__u32 rhport, enum usb_device_speed speed)
140{
141 /* check rhport */
142 if (rhport >= VHCI_NPORTS) {
143 pr_err("port %u\n", rhport);
144 return -EINVAL;
145 }
146
147 /* check speed */
148 switch (speed) {
149 case USB_SPEED_LOW:
150 case USB_SPEED_FULL:
151 case USB_SPEED_HIGH:
152 case USB_SPEED_WIRELESS:
153 break;
154 default:
155 pr_err("Failed attach request for unsupported USB speed: %s\n",
156 usb_speed_string(speed));
157 return -EINVAL;
158 }
159
160 return 0;
161}
162
163/*
164 * To start a new USB/IP attachment, a userland program needs to setup a TCP
165 * connection and then write its socket descriptor with remote device
166 * information into this sysfs file.
167 *
168 * A remote device is virtually attached to the root-hub port of @rhport with
169 * @speed. @devid is embedded into a request to specify the remote device in a
170 * server host.
171 *
172 * write() returns 0 on success, else negative errno.
173 */
174static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
175 const char *buf, size_t count)
176{
177 struct vhci_device *vdev;
178 struct socket *socket;
179 int sockfd = 0;
180 __u32 rhport = 0, devid = 0, speed = 0;
181 int err;
182 unsigned long flags;
183
184 /*
185 * @rhport: port number of vhci_hcd
186 * @sockfd: socket descriptor of an established TCP connection
187 * @devid: unique device identifier in a remote host
188 * @speed: usb device speed in a remote host
189 */
190 if (sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed) != 4)
191 return -EINVAL;
192
193 usbip_dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
194 rhport, sockfd, devid, speed);
195
196 /* check received parameters */
197 if (valid_args(rhport, speed) < 0)
198 return -EINVAL;
199
200 /* Extract socket from fd. */
201 socket = sockfd_lookup(sockfd, &err);
202 if (!socket)
203 return -EINVAL;
204
205 /* now need lock until setting vdev status as used */
206
207 /* begin a lock */
208 spin_lock_irqsave(&the_controller->lock, flags);
209 vdev = port_to_vdev(rhport);
210 spin_lock(&vdev->ud.lock);
211
212 if (vdev->ud.status != VDEV_ST_NULL) {
213 /* end of the lock */
214 spin_unlock(&vdev->ud.lock);
215 spin_unlock_irqrestore(&the_controller->lock, flags);
216
217 sockfd_put(socket);
218
219 dev_err(dev, "port %d already used\n", rhport);
220 return -EINVAL;
221 }
222
223 dev_info(dev,
224 "rhport(%u) sockfd(%d) devid(%u) speed(%u) speed_str(%s)\n",
225 rhport, sockfd, devid, speed, usb_speed_string(speed));
226
227 vdev->devid = devid;
228 vdev->speed = speed;
229 vdev->ud.tcp_socket = socket;
230 vdev->ud.status = VDEV_ST_NOTASSIGNED;
231
232 spin_unlock(&vdev->ud.lock);
233 spin_unlock_irqrestore(&the_controller->lock, flags);
234 /* end the lock */
235
236 vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
237 vdev->ud.tcp_tx = kthread_get_run(vhci_tx_loop, &vdev->ud, "vhci_tx");
238
239 rh_port_connect(rhport, speed);
240
241 return count;
242}
243static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach);
244
245static struct attribute *dev_attrs[] = {
246 &dev_attr_status.attr,
247 &dev_attr_detach.attr,
248 &dev_attr_attach.attr,
249 &dev_attr_usbip_debug.attr,
250 NULL,
251};
252
253const struct attribute_group dev_attr_group = {
254 .attrs = dev_attrs,
255};