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Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * devio.c -- User space communication with USB devices. | |
5 | * | |
6 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
1da177e4 LT |
22 | * This file implements the usbfs/x/y files, where |
23 | * x is the bus number and y the device number. | |
24 | * | |
25 | * It allows user space programs/"drivers" to communicate directly | |
26 | * with USB devices without intervening kernel driver. | |
27 | * | |
28 | * Revision history | |
29 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
30 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
31 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
32 | * (CAN-2005-3055) | |
1da177e4 LT |
33 | */ |
34 | ||
35 | /*****************************************************************************/ | |
36 | ||
37 | #include <linux/fs.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/smp_lock.h> | |
41 | #include <linux/signal.h> | |
42 | #include <linux/poll.h> | |
43 | #include <linux/module.h> | |
44 | #include <linux/usb.h> | |
45 | #include <linux/usbdevice_fs.h> | |
27729aad | 46 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 47 | #include <linux/cdev.h> |
a7b986b3 | 48 | #include <linux/notifier.h> |
7a01955f | 49 | #include <linux/security.h> |
1da177e4 LT |
50 | #include <asm/uaccess.h> |
51 | #include <asm/byteorder.h> | |
52 | #include <linux/moduleparam.h> | |
53 | ||
1da177e4 LT |
54 | #include "usb.h" |
55 | ||
fbf82fd2 KS |
56 | #define USB_MAXBUS 64 |
57 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
fbf82fd2 | 58 | |
4a2a8a2c AS |
59 | /* Mutual exclusion for removal, open, and release */ |
60 | DEFINE_MUTEX(usbfs_mutex); | |
61 | ||
cd9f0375 AS |
62 | struct dev_state { |
63 | struct list_head list; /* state list */ | |
64 | struct usb_device *dev; | |
65 | struct file *file; | |
66 | spinlock_t lock; /* protects the async urb lists */ | |
67 | struct list_head async_pending; | |
68 | struct list_head async_completed; | |
69 | wait_queue_head_t wait; /* wake up if a request completed */ | |
70 | unsigned int discsignr; | |
71 | struct pid *disc_pid; | |
72 | uid_t disc_uid, disc_euid; | |
73 | void __user *disccontext; | |
74 | unsigned long ifclaimed; | |
75 | u32 secid; | |
01c6460f | 76 | u32 disabled_bulk_eps; |
cd9f0375 AS |
77 | }; |
78 | ||
1da177e4 LT |
79 | struct async { |
80 | struct list_head asynclist; | |
81 | struct dev_state *ps; | |
2425c08b | 82 | struct pid *pid; |
46113830 | 83 | uid_t uid, euid; |
1da177e4 LT |
84 | unsigned int signr; |
85 | unsigned int ifnum; | |
86 | void __user *userbuffer; | |
87 | void __user *userurb; | |
88 | struct urb *urb; | |
e015268d | 89 | int status; |
7a01955f | 90 | u32 secid; |
01c6460f AS |
91 | u8 bulk_addr; |
92 | u8 bulk_status; | |
1da177e4 LT |
93 | }; |
94 | ||
04e482ff GKH |
95 | static int usbfs_snoop; |
96 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
97 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
98 | |
99 | #define snoop(dev, format, arg...) \ | |
100 | do { \ | |
101 | if (usbfs_snoop) \ | |
04e482ff | 102 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
103 | } while (0) |
104 | ||
4c6e8971 AS |
105 | enum snoop_when { |
106 | SUBMIT, COMPLETE | |
107 | }; | |
fad21bdf | 108 | |
4c6e8971 | 109 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 LT |
110 | |
111 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
112 | ||
4c6e8971 | 113 | |
d34d9721 | 114 | static int connected(struct dev_state *ps) |
1da177e4 | 115 | { |
349710c3 AS |
116 | return (!list_empty(&ps->list) && |
117 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
118 | } |
119 | ||
120 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
121 | { | |
122 | loff_t ret; | |
123 | ||
f9de332e | 124 | mutex_lock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
125 | |
126 | switch (orig) { | |
127 | case 0: | |
128 | file->f_pos = offset; | |
129 | ret = file->f_pos; | |
130 | break; | |
131 | case 1: | |
132 | file->f_pos += offset; | |
133 | ret = file->f_pos; | |
134 | break; | |
135 | case 2: | |
136 | default: | |
137 | ret = -EINVAL; | |
138 | } | |
139 | ||
f9de332e | 140 | mutex_unlock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
141 | return ret; |
142 | } | |
143 | ||
04e482ff GKH |
144 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
145 | loff_t *ppos) | |
1da177e4 | 146 | { |
ec17cf1c | 147 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
148 | struct usb_device *dev = ps->dev; |
149 | ssize_t ret = 0; | |
150 | unsigned len; | |
151 | loff_t pos; | |
152 | int i; | |
153 | ||
154 | pos = *ppos; | |
155 | usb_lock_device(dev); | |
349710c3 | 156 | if (!connected(ps)) { |
1da177e4 LT |
157 | ret = -ENODEV; |
158 | goto err; | |
159 | } else if (pos < 0) { | |
160 | ret = -EINVAL; | |
161 | goto err; | |
162 | } | |
163 | ||
164 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
165 | /* 18 bytes - fits on the stack */ |
166 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
167 | |
168 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
169 | le16_to_cpus(&temp_desc.bcdUSB); |
170 | le16_to_cpus(&temp_desc.idVendor); | |
171 | le16_to_cpus(&temp_desc.idProduct); | |
172 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
173 | |
174 | len = sizeof(struct usb_device_descriptor) - pos; | |
175 | if (len > nbytes) | |
176 | len = nbytes; | |
8781ba0a | 177 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
178 | ret = -EFAULT; |
179 | goto err; | |
180 | } | |
1da177e4 LT |
181 | |
182 | *ppos += len; | |
183 | buf += len; | |
184 | nbytes -= len; | |
185 | ret += len; | |
186 | } | |
187 | ||
188 | pos = sizeof(struct usb_device_descriptor); | |
189 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
190 | struct usb_config_descriptor *config = | |
191 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
192 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
193 | ||
194 | if (*ppos < pos + length) { | |
195 | ||
196 | /* The descriptor may claim to be longer than it | |
197 | * really is. Here is the actual allocated length. */ | |
198 | unsigned alloclen = | |
199 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
200 | ||
201 | len = length - (*ppos - pos); | |
202 | if (len > nbytes) | |
203 | len = nbytes; | |
204 | ||
205 | /* Simply don't write (skip over) unallocated parts */ | |
206 | if (alloclen > (*ppos - pos)) { | |
207 | alloclen -= (*ppos - pos); | |
208 | if (copy_to_user(buf, | |
209 | dev->rawdescriptors[i] + (*ppos - pos), | |
210 | min(len, alloclen))) { | |
211 | ret = -EFAULT; | |
212 | goto err; | |
213 | } | |
214 | } | |
215 | ||
216 | *ppos += len; | |
217 | buf += len; | |
218 | nbytes -= len; | |
219 | ret += len; | |
220 | } | |
221 | ||
222 | pos += length; | |
223 | } | |
224 | ||
225 | err: | |
226 | usb_unlock_device(dev); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | /* | |
231 | * async list handling | |
232 | */ | |
233 | ||
234 | static struct async *alloc_async(unsigned int numisoframes) | |
235 | { | |
dd95b814 | 236 | struct async *as; |
0a1ef3b5 | 237 | |
dd95b814 | 238 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
239 | if (!as) |
240 | return NULL; | |
1da177e4 LT |
241 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
242 | if (!as->urb) { | |
243 | kfree(as); | |
244 | return NULL; | |
245 | } | |
04e482ff | 246 | return as; |
1da177e4 LT |
247 | } |
248 | ||
249 | static void free_async(struct async *as) | |
250 | { | |
2425c08b | 251 | put_pid(as->pid); |
6fd19f4b JJ |
252 | kfree(as->urb->transfer_buffer); |
253 | kfree(as->urb->setup_packet); | |
1da177e4 | 254 | usb_free_urb(as->urb); |
6fd19f4b | 255 | kfree(as); |
1da177e4 LT |
256 | } |
257 | ||
d34d9721 | 258 | static void async_newpending(struct async *as) |
1da177e4 | 259 | { |
04e482ff GKH |
260 | struct dev_state *ps = as->ps; |
261 | unsigned long flags; | |
262 | ||
263 | spin_lock_irqsave(&ps->lock, flags); | |
264 | list_add_tail(&as->asynclist, &ps->async_pending); | |
265 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
266 | } |
267 | ||
d34d9721 | 268 | static void async_removepending(struct async *as) |
1da177e4 | 269 | { |
04e482ff GKH |
270 | struct dev_state *ps = as->ps; |
271 | unsigned long flags; | |
272 | ||
273 | spin_lock_irqsave(&ps->lock, flags); | |
274 | list_del_init(&as->asynclist); | |
275 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
276 | } |
277 | ||
d34d9721 | 278 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 279 | { |
04e482ff GKH |
280 | unsigned long flags; |
281 | struct async *as = NULL; | |
282 | ||
283 | spin_lock_irqsave(&ps->lock, flags); | |
284 | if (!list_empty(&ps->async_completed)) { | |
285 | as = list_entry(ps->async_completed.next, struct async, | |
286 | asynclist); | |
287 | list_del_init(&as->asynclist); | |
288 | } | |
289 | spin_unlock_irqrestore(&ps->lock, flags); | |
290 | return as; | |
1da177e4 LT |
291 | } |
292 | ||
d34d9721 | 293 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 294 | void __user *userurb) |
1da177e4 | 295 | { |
04e482ff GKH |
296 | unsigned long flags; |
297 | struct async *as; | |
1da177e4 | 298 | |
04e482ff | 299 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
300 | list_for_each_entry(as, &ps->async_pending, asynclist) |
301 | if (as->userurb == userurb) { | |
302 | list_del_init(&as->asynclist); | |
303 | spin_unlock_irqrestore(&ps->lock, flags); | |
304 | return as; | |
305 | } | |
04e482ff GKH |
306 | spin_unlock_irqrestore(&ps->lock, flags); |
307 | return NULL; | |
1da177e4 LT |
308 | } |
309 | ||
4c6e8971 AS |
310 | static void snoop_urb(struct usb_device *udev, |
311 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
312 | int timeout_or_status, enum snoop_when when, |
313 | unsigned char *data, unsigned data_len) | |
e639dd3f | 314 | { |
4c6e8971 AS |
315 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
316 | static const char *dirs[] = {"out", "in"}; | |
317 | int ep; | |
318 | const char *t, *d; | |
e639dd3f GKH |
319 | |
320 | if (!usbfs_snoop) | |
321 | return; | |
322 | ||
4c6e8971 AS |
323 | ep = usb_pipeendpoint(pipe); |
324 | t = types[usb_pipetype(pipe)]; | |
325 | d = dirs[!!usb_pipein(pipe)]; | |
326 | ||
327 | if (userurb) { /* Async */ | |
328 | if (when == SUBMIT) | |
329 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
330 | "length %u\n", | |
331 | userurb, ep, t, d, length); | |
332 | else | |
333 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
334 | "actual_length %u status %d\n", | |
335 | userurb, ep, t, d, length, | |
336 | timeout_or_status); | |
337 | } else { | |
338 | if (when == SUBMIT) | |
339 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
340 | "timeout %d\n", | |
341 | ep, t, d, length, timeout_or_status); | |
342 | else | |
343 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
344 | "status %d\n", | |
345 | ep, t, d, length, timeout_or_status); | |
346 | } | |
0880aef4 CF |
347 | |
348 | if (data && data_len > 0) { | |
349 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
350 | data, data_len, 1); | |
351 | } | |
e639dd3f GKH |
352 | } |
353 | ||
01c6460f AS |
354 | #define AS_CONTINUATION 1 |
355 | #define AS_UNLINK 2 | |
356 | ||
357 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
358 | __releases(ps->lock) | |
359 | __acquires(ps->lock) | |
360 | { | |
361 | struct async *as; | |
362 | ||
363 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
364 | * including the first one without AS_CONTINUATION. If such an | |
365 | * URB is encountered then a new transfer has already started so | |
366 | * the endpoint doesn't need to be disabled; otherwise it does. | |
367 | */ | |
368 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
369 | if (as->bulk_addr == bulk_addr) { | |
370 | if (as->bulk_status != AS_CONTINUATION) | |
371 | goto rescan; | |
372 | as->bulk_status = AS_UNLINK; | |
373 | as->bulk_addr = 0; | |
374 | } | |
375 | } | |
376 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
377 | ||
378 | /* Now carefully unlink all the marked pending URBs */ | |
379 | rescan: | |
380 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
381 | if (as->bulk_status == AS_UNLINK) { | |
382 | as->bulk_status = 0; /* Only once */ | |
383 | spin_unlock(&ps->lock); /* Allow completions */ | |
384 | usb_unlink_urb(as->urb); | |
385 | spin_lock(&ps->lock); | |
386 | goto rescan; | |
387 | } | |
388 | } | |
389 | } | |
390 | ||
7d12e780 | 391 | static void async_completed(struct urb *urb) |
1da177e4 | 392 | { |
04e482ff GKH |
393 | struct async *as = urb->context; |
394 | struct dev_state *ps = as->ps; | |
1da177e4 | 395 | struct siginfo sinfo; |
516a1a07 ON |
396 | struct pid *pid = NULL; |
397 | uid_t uid = 0; | |
398 | uid_t euid = 0; | |
399 | u32 secid = 0; | |
400 | int signr; | |
1da177e4 | 401 | |
04e482ff GKH |
402 | spin_lock(&ps->lock); |
403 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 404 | as->status = urb->status; |
516a1a07 ON |
405 | signr = as->signr; |
406 | if (signr) { | |
1da177e4 | 407 | sinfo.si_signo = as->signr; |
e015268d | 408 | sinfo.si_errno = as->status; |
1da177e4 LT |
409 | sinfo.si_code = SI_ASYNCIO; |
410 | sinfo.si_addr = as->userurb; | |
516a1a07 ON |
411 | pid = as->pid; |
412 | uid = as->uid; | |
413 | euid = as->euid; | |
414 | secid = as->secid; | |
1da177e4 | 415 | } |
e639dd3f | 416 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 417 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
0880aef4 CF |
418 | as->status, COMPLETE, |
419 | ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ? | |
420 | NULL : urb->transfer_buffer, urb->actual_length); | |
01c6460f AS |
421 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
422 | as->status != -ENOENT) | |
423 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
424 | spin_unlock(&ps->lock); |
425 | ||
426 | if (signr) | |
427 | kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid, | |
428 | euid, secid); | |
429 | ||
e639dd3f | 430 | wake_up(&ps->wait); |
1da177e4 LT |
431 | } |
432 | ||
04e482ff | 433 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
434 | { |
435 | struct async *as; | |
436 | unsigned long flags; | |
437 | ||
438 | spin_lock_irqsave(&ps->lock, flags); | |
439 | while (!list_empty(list)) { | |
440 | as = list_entry(list->next, struct async, asynclist); | |
441 | list_del_init(&as->asynclist); | |
442 | ||
443 | /* drop the spinlock so the completion handler can run */ | |
444 | spin_unlock_irqrestore(&ps->lock, flags); | |
445 | usb_kill_urb(as->urb); | |
446 | spin_lock_irqsave(&ps->lock, flags); | |
447 | } | |
448 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
449 | } |
450 | ||
04e482ff GKH |
451 | static void destroy_async_on_interface(struct dev_state *ps, |
452 | unsigned int ifnum) | |
1da177e4 LT |
453 | { |
454 | struct list_head *p, *q, hitlist; | |
455 | unsigned long flags; | |
456 | ||
457 | INIT_LIST_HEAD(&hitlist); | |
458 | spin_lock_irqsave(&ps->lock, flags); | |
459 | list_for_each_safe(p, q, &ps->async_pending) | |
460 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
461 | list_move_tail(p, &hitlist); | |
462 | spin_unlock_irqrestore(&ps->lock, flags); | |
463 | destroy_async(ps, &hitlist); | |
464 | } | |
465 | ||
d34d9721 | 466 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 467 | { |
04e482ff | 468 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
469 | } |
470 | ||
471 | /* | |
472 | * interface claims are made only at the request of user level code, | |
473 | * which can also release them (explicitly or by closing files). | |
474 | * they're also undone when devices disconnect. | |
475 | */ | |
476 | ||
04e482ff GKH |
477 | static int driver_probe(struct usb_interface *intf, |
478 | const struct usb_device_id *id) | |
1da177e4 LT |
479 | { |
480 | return -ENODEV; | |
481 | } | |
482 | ||
483 | static void driver_disconnect(struct usb_interface *intf) | |
484 | { | |
04e482ff | 485 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
486 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
487 | ||
488 | if (!ps) | |
489 | return; | |
490 | ||
491 | /* NOTE: this relies on usbcore having canceled and completed | |
492 | * all pending I/O requests; 2.6 does that. | |
493 | */ | |
494 | ||
495 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
496 | clear_bit(ifnum, &ps->ifclaimed); | |
497 | else | |
3b6004f3 GKH |
498 | dev_warn(&intf->dev, "interface number %u out of range\n", |
499 | ifnum); | |
1da177e4 | 500 | |
04e482ff | 501 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
502 | |
503 | /* force async requests to complete */ | |
504 | destroy_async_on_interface(ps, ifnum); | |
505 | } | |
506 | ||
2e2eb83f AS |
507 | /* The following routines are merely placeholders. There is no way |
508 | * to inform a user task about suspend or resumes. | |
509 | */ | |
510 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
511 | { | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static int driver_resume(struct usb_interface *intf) | |
516 | { | |
517 | return 0; | |
518 | } | |
519 | ||
1da177e4 | 520 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
521 | .name = "usbfs", |
522 | .probe = driver_probe, | |
523 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
524 | .suspend = driver_suspend, |
525 | .resume = driver_resume, | |
1da177e4 LT |
526 | }; |
527 | ||
528 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
529 | { | |
530 | struct usb_device *dev = ps->dev; | |
531 | struct usb_interface *intf; | |
532 | int err; | |
533 | ||
534 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
535 | return -EINVAL; | |
536 | /* already claimed */ | |
537 | if (test_bit(ifnum, &ps->ifclaimed)) | |
538 | return 0; | |
539 | ||
1da177e4 LT |
540 | intf = usb_ifnum_to_if(dev, ifnum); |
541 | if (!intf) | |
542 | err = -ENOENT; | |
543 | else | |
544 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
545 | if (err == 0) |
546 | set_bit(ifnum, &ps->ifclaimed); | |
547 | return err; | |
548 | } | |
549 | ||
550 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
551 | { | |
552 | struct usb_device *dev; | |
553 | struct usb_interface *intf; | |
554 | int err; | |
555 | ||
556 | err = -EINVAL; | |
557 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
558 | return err; | |
559 | dev = ps->dev; | |
1da177e4 LT |
560 | intf = usb_ifnum_to_if(dev, ifnum); |
561 | if (!intf) | |
562 | err = -ENOENT; | |
563 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
564 | usb_driver_release_interface(&usbfs_driver, intf); | |
565 | err = 0; | |
566 | } | |
1da177e4 LT |
567 | return err; |
568 | } | |
569 | ||
570 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
571 | { | |
572 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
573 | return -EHOSTUNREACH; | |
574 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
575 | return -EINVAL; | |
576 | if (test_bit(ifnum, &ps->ifclaimed)) | |
577 | return 0; | |
578 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
579 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
580 | "interface %u before use\n", task_pid_nr(current), | |
581 | current->comm, ifnum); | |
1da177e4 LT |
582 | return claimintf(ps, ifnum); |
583 | } | |
584 | ||
585 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
586 | { | |
587 | unsigned int i, j, e; | |
04e482ff | 588 | struct usb_interface *intf; |
1da177e4 LT |
589 | struct usb_host_interface *alts; |
590 | struct usb_endpoint_descriptor *endpt; | |
591 | ||
592 | if (ep & ~(USB_DIR_IN|0xf)) | |
593 | return -EINVAL; | |
594 | if (!dev->actconfig) | |
595 | return -ESRCH; | |
596 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
597 | intf = dev->actconfig->interface[i]; | |
598 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 599 | alts = &intf->altsetting[j]; |
1da177e4 LT |
600 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
601 | endpt = &alts->endpoint[e].desc; | |
602 | if (endpt->bEndpointAddress == ep) | |
603 | return alts->desc.bInterfaceNumber; | |
604 | } | |
605 | } | |
606 | } | |
04e482ff | 607 | return -ENOENT; |
1da177e4 LT |
608 | } |
609 | ||
04e482ff GKH |
610 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
611 | unsigned int index) | |
1da177e4 LT |
612 | { |
613 | int ret = 0; | |
614 | ||
6da9c990 DV |
615 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
616 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 617 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
618 | return -EHOSTUNREACH; |
619 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
620 | return 0; | |
621 | ||
622 | index &= 0xff; | |
623 | switch (requesttype & USB_RECIP_MASK) { | |
624 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
625 | ret = findintfep(ps->dev, index); |
626 | if (ret >= 0) | |
1da177e4 LT |
627 | ret = checkintf(ps, ret); |
628 | break; | |
629 | ||
630 | case USB_RECIP_INTERFACE: | |
631 | ret = checkintf(ps, index); | |
632 | break; | |
633 | } | |
634 | return ret; | |
635 | } | |
636 | ||
61ad04a8 | 637 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 638 | { |
a80d5ff0 | 639 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 640 | } |
4592bf5a | 641 | |
61ad04a8 | 642 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
643 | { |
644 | struct device *dev; | |
645 | ||
a80d5ff0 DH |
646 | dev = bus_find_device(&usb_bus_type, NULL, |
647 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
648 | if (!dev) |
649 | return NULL; | |
9f8b17e6 KS |
650 | return container_of(dev, struct usb_device, dev); |
651 | } | |
4592bf5a | 652 | |
1da177e4 LT |
653 | /* |
654 | * file operations | |
655 | */ | |
656 | static int usbdev_open(struct inode *inode, struct file *file) | |
657 | { | |
fbf82fd2 | 658 | struct usb_device *dev = NULL; |
1da177e4 | 659 | struct dev_state *ps; |
86a264ab | 660 | const struct cred *cred = current_cred(); |
1da177e4 LT |
661 | int ret; |
662 | ||
1da177e4 | 663 | ret = -ENOMEM; |
04e482ff GKH |
664 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
665 | if (!ps) | |
62e299e6 | 666 | goto out_free_ps; |
1da177e4 | 667 | |
01105a24 | 668 | ret = -ENODEV; |
61ad04a8 | 669 | |
62e299e6 AS |
670 | /* Protect against simultaneous removal or release */ |
671 | mutex_lock(&usbfs_mutex); | |
672 | ||
9f8b17e6 | 673 | /* usbdev device-node */ |
fbf82fd2 | 674 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 675 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 676 | |
9f8b17e6 KS |
677 | #ifdef CONFIG_USB_DEVICEFS |
678 | /* procfs file */ | |
d64aac36 | 679 | if (!dev) { |
8e18e294 | 680 | dev = inode->i_private; |
d64aac36 AS |
681 | if (dev && dev->usbfs_dentry && |
682 | dev->usbfs_dentry->d_inode == inode) | |
683 | usb_get_dev(dev); | |
684 | else | |
685 | dev = NULL; | |
686 | } | |
9f8b17e6 | 687 | #endif |
62e299e6 AS |
688 | mutex_unlock(&usbfs_mutex); |
689 | ||
690 | if (!dev) | |
691 | goto out_free_ps; | |
692 | ||
693 | usb_lock_device(dev); | |
694 | if (dev->state == USB_STATE_NOTATTACHED) | |
695 | goto out_unlock_device; | |
696 | ||
94fcda1f | 697 | ret = usb_autoresume_device(dev); |
01d883d4 | 698 | if (ret) |
62e299e6 | 699 | goto out_unlock_device; |
01d883d4 | 700 | |
1da177e4 LT |
701 | ps->dev = dev; |
702 | ps->file = file; | |
703 | spin_lock_init(&ps->lock); | |
316547fd | 704 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
705 | INIT_LIST_HEAD(&ps->async_pending); |
706 | INIT_LIST_HEAD(&ps->async_completed); | |
707 | init_waitqueue_head(&ps->wait); | |
708 | ps->discsignr = 0; | |
2425c08b | 709 | ps->disc_pid = get_pid(task_pid(current)); |
86a264ab DH |
710 | ps->disc_uid = cred->uid; |
711 | ps->disc_euid = cred->euid; | |
1da177e4 LT |
712 | ps->disccontext = NULL; |
713 | ps->ifclaimed = 0; | |
7a01955f | 714 | security_task_getsecid(current, &ps->secid); |
527660a8 | 715 | smp_wmb(); |
1da177e4 LT |
716 | list_add_tail(&ps->list, &dev->filelist); |
717 | file->private_data = ps; | |
62e299e6 | 718 | usb_unlock_device(dev); |
2da41d5f AS |
719 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
720 | current->comm); | |
62e299e6 AS |
721 | return ret; |
722 | ||
723 | out_unlock_device: | |
724 | usb_unlock_device(dev); | |
725 | usb_put_dev(dev); | |
726 | out_free_ps: | |
727 | kfree(ps); | |
4a2a8a2c | 728 | return ret; |
1da177e4 LT |
729 | } |
730 | ||
731 | static int usbdev_release(struct inode *inode, struct file *file) | |
732 | { | |
ec17cf1c | 733 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
734 | struct usb_device *dev = ps->dev; |
735 | unsigned int ifnum; | |
6ff10464 | 736 | struct async *as; |
1da177e4 LT |
737 | |
738 | usb_lock_device(dev); | |
7cbe5dca | 739 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 740 | |
1da177e4 | 741 | list_del_init(&ps->list); |
4a2a8a2c | 742 | |
1da177e4 LT |
743 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
744 | ifnum++) { | |
745 | if (test_bit(ifnum, &ps->ifclaimed)) | |
746 | releaseintf(ps, ifnum); | |
747 | } | |
748 | destroy_all_async(ps); | |
94fcda1f | 749 | usb_autosuspend_device(dev); |
1da177e4 LT |
750 | usb_unlock_device(dev); |
751 | usb_put_dev(dev); | |
2425c08b | 752 | put_pid(ps->disc_pid); |
6ff10464 AS |
753 | |
754 | as = async_getcompleted(ps); | |
755 | while (as) { | |
756 | free_async(as); | |
757 | as = async_getcompleted(ps); | |
758 | } | |
1da177e4 | 759 | kfree(ps); |
4a2a8a2c | 760 | return 0; |
1da177e4 LT |
761 | } |
762 | ||
763 | static int proc_control(struct dev_state *ps, void __user *arg) | |
764 | { | |
765 | struct usb_device *dev = ps->dev; | |
766 | struct usbdevfs_ctrltransfer ctrl; | |
767 | unsigned int tmo; | |
768 | unsigned char *tbuf; | |
ff66e3ce | 769 | unsigned wLength; |
4c6e8971 | 770 | int i, pipe, ret; |
1da177e4 LT |
771 | |
772 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
773 | return -EFAULT; | |
04e482ff GKH |
774 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
775 | if (ret) | |
1da177e4 | 776 | return ret; |
ff66e3ce AM |
777 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
778 | if (wLength > PAGE_SIZE) | |
1da177e4 | 779 | return -EINVAL; |
04e482ff GKH |
780 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
781 | if (!tbuf) | |
1da177e4 LT |
782 | return -ENOMEM; |
783 | tmo = ctrl.timeout; | |
0880aef4 CF |
784 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
785 | "bRequest=%02x wValue=%04x " | |
786 | "wIndex=%04x wLength=%04x\n", | |
787 | ctrl.bRequestType, ctrl.bRequest, | |
788 | __le16_to_cpup(&ctrl.wValue), | |
789 | __le16_to_cpup(&ctrl.wIndex), | |
790 | __le16_to_cpup(&ctrl.wLength)); | |
1da177e4 | 791 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
792 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
793 | ctrl.wLength)) { | |
1da177e4 LT |
794 | free_page((unsigned long)tbuf); |
795 | return -EINVAL; | |
796 | } | |
4c6e8971 | 797 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 798 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
799 | |
800 | usb_unlock_device(dev); | |
4c6e8971 | 801 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
802 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
803 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 804 | usb_lock_device(dev); |
0880aef4 CF |
805 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
806 | tbuf, i); | |
1da177e4 | 807 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 808 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
809 | free_page((unsigned long)tbuf); |
810 | return -EFAULT; | |
811 | } | |
812 | } | |
813 | } else { | |
814 | if (ctrl.wLength) { | |
815 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
816 | free_page((unsigned long)tbuf); | |
817 | return -EFAULT; | |
818 | } | |
819 | } | |
4c6e8971 | 820 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
821 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
822 | tbuf, ctrl.wLength); | |
4c6e8971 | 823 | |
1da177e4 | 824 | usb_unlock_device(dev); |
04e482ff GKH |
825 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
826 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
827 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 828 | usb_lock_device(dev); |
0880aef4 | 829 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 LT |
830 | } |
831 | free_page((unsigned long)tbuf); | |
04e482ff | 832 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
833 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
834 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
835 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
836 | ctrl.wLength, i); | |
837 | } | |
838 | return i; | |
839 | } | |
840 | ||
841 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
842 | { | |
843 | struct usb_device *dev = ps->dev; | |
844 | struct usbdevfs_bulktransfer bulk; | |
845 | unsigned int tmo, len1, pipe; | |
846 | int len2; | |
847 | unsigned char *tbuf; | |
4c6e8971 | 848 | int i, ret; |
1da177e4 LT |
849 | |
850 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
851 | return -EFAULT; | |
04e482ff GKH |
852 | ret = findintfep(ps->dev, bulk.ep); |
853 | if (ret < 0) | |
1da177e4 | 854 | return ret; |
04e482ff GKH |
855 | ret = checkintf(ps, ret); |
856 | if (ret) | |
1da177e4 LT |
857 | return ret; |
858 | if (bulk.ep & USB_DIR_IN) | |
859 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
860 | else | |
861 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
862 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
863 | return -EINVAL; | |
864 | len1 = bulk.len; | |
865 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
866 | return -EINVAL; | |
867 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
868 | return -ENOMEM; | |
869 | tmo = bulk.timeout; | |
870 | if (bulk.ep & 0x80) { | |
871 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
872 | kfree(tbuf); | |
873 | return -EINVAL; | |
874 | } | |
0880aef4 | 875 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 876 | |
1da177e4 LT |
877 | usb_unlock_device(dev); |
878 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
879 | usb_lock_device(dev); | |
0880aef4 | 880 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 881 | |
1da177e4 LT |
882 | if (!i && len2) { |
883 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
884 | kfree(tbuf); | |
885 | return -EFAULT; | |
886 | } | |
887 | } | |
888 | } else { | |
889 | if (len1) { | |
890 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
891 | kfree(tbuf); | |
892 | return -EFAULT; | |
893 | } | |
894 | } | |
0880aef4 | 895 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 896 | |
1da177e4 LT |
897 | usb_unlock_device(dev); |
898 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
899 | usb_lock_device(dev); | |
0880aef4 | 900 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 LT |
901 | } |
902 | kfree(tbuf); | |
903 | if (i < 0) | |
904 | return i; | |
905 | return len2; | |
906 | } | |
907 | ||
908 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
909 | { | |
910 | unsigned int ep; | |
911 | int ret; | |
912 | ||
913 | if (get_user(ep, (unsigned int __user *)arg)) | |
914 | return -EFAULT; | |
04e482ff GKH |
915 | ret = findintfep(ps->dev, ep); |
916 | if (ret < 0) | |
1da177e4 | 917 | return ret; |
04e482ff GKH |
918 | ret = checkintf(ps, ret); |
919 | if (ret) | |
1da177e4 | 920 | return ret; |
3444b26a | 921 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
922 | return 0; |
923 | } | |
924 | ||
925 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
926 | { | |
927 | unsigned int ep; | |
928 | int pipe; | |
929 | int ret; | |
930 | ||
931 | if (get_user(ep, (unsigned int __user *)arg)) | |
932 | return -EFAULT; | |
04e482ff GKH |
933 | ret = findintfep(ps->dev, ep); |
934 | if (ret < 0) | |
1da177e4 | 935 | return ret; |
04e482ff GKH |
936 | ret = checkintf(ps, ret); |
937 | if (ret) | |
1da177e4 LT |
938 | return ret; |
939 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
940 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
941 | else | |
942 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
943 | |
944 | return usb_clear_halt(ps->dev, pipe); | |
945 | } | |
1da177e4 LT |
946 | |
947 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
948 | { | |
949 | struct usbdevfs_getdriver gd; | |
950 | struct usb_interface *intf; | |
951 | int ret; | |
952 | ||
953 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
954 | return -EFAULT; | |
1da177e4 LT |
955 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
956 | if (!intf || !intf->dev.driver) | |
957 | ret = -ENODATA; | |
958 | else { | |
959 | strncpy(gd.driver, intf->dev.driver->name, | |
960 | sizeof(gd.driver)); | |
961 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
962 | } | |
1da177e4 LT |
963 | return ret; |
964 | } | |
965 | ||
966 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
967 | { | |
968 | struct usbdevfs_connectinfo ci; | |
969 | ||
970 | ci.devnum = ps->dev->devnum; | |
971 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
972 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
973 | return -EFAULT; | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static int proc_resetdevice(struct dev_state *ps) | |
978 | { | |
742120c6 | 979 | return usb_reset_device(ps->dev); |
1da177e4 LT |
980 | } |
981 | ||
982 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
983 | { | |
984 | struct usbdevfs_setinterface setintf; | |
985 | int ret; | |
986 | ||
987 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
988 | return -EFAULT; | |
989 | if ((ret = checkintf(ps, setintf.interface))) | |
990 | return ret; | |
991 | return usb_set_interface(ps->dev, setintf.interface, | |
992 | setintf.altsetting); | |
993 | } | |
994 | ||
995 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
996 | { | |
3f141e2a | 997 | int u; |
1da177e4 | 998 | int status = 0; |
04e482ff | 999 | struct usb_host_config *actconfig; |
1da177e4 | 1000 | |
3f141e2a | 1001 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1002 | return -EFAULT; |
1003 | ||
04e482ff GKH |
1004 | actconfig = ps->dev->actconfig; |
1005 | ||
1006 | /* Don't touch the device if any interfaces are claimed. | |
1007 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1008 | * an interface is claimed by usbfs it could easily deadlock. |
1009 | */ | |
04e482ff GKH |
1010 | if (actconfig) { |
1011 | int i; | |
1012 | ||
1013 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1014 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1015 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1016 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1017 | "while '%s' sets config #%d\n", |
1018 | actconfig->interface[i] | |
1019 | ->cur_altsetting | |
1020 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1021 | actconfig->interface[i] |
1022 | ->dev.driver->name, | |
1da177e4 | 1023 | current->comm, u); |
04e482ff | 1024 | status = -EBUSY; |
1da177e4 | 1025 | break; |
1da177e4 | 1026 | } |
04e482ff GKH |
1027 | } |
1028 | } | |
1da177e4 LT |
1029 | |
1030 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1031 | * so avoid usb_set_configuration()'s kick to sysfs | |
1032 | */ | |
1033 | if (status == 0) { | |
1034 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1035 | status = usb_reset_configuration(ps->dev); | |
1036 | else | |
1037 | status = usb_set_configuration(ps->dev, u); | |
1038 | } | |
1039 | ||
1040 | return status; | |
1041 | } | |
1042 | ||
1da177e4 | 1043 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1044 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1045 | void __user *arg) | |
1da177e4 LT |
1046 | { |
1047 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1048 | struct usb_host_endpoint *ep; | |
1049 | struct async *as; | |
1050 | struct usb_ctrlrequest *dr = NULL; | |
86a264ab | 1051 | const struct cred *cred = current_cred(); |
1da177e4 | 1052 | unsigned int u, totlen, isofrmlen; |
97b9eb91 | 1053 | int ret, ifnum = -1; |
93cf9b90 | 1054 | int is_in; |
1da177e4 | 1055 | |
14722ef4 AS |
1056 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1057 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1058 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1059 | USBDEVFS_URB_NO_FSBR | |
1060 | USBDEVFS_URB_ZERO_PACKET | | |
1061 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1062 | return -EINVAL; |
9180135b | 1063 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1064 | return -EINVAL; |
04e482ff GKH |
1065 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1066 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1067 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1068 | if (ifnum < 0) | |
1da177e4 | 1069 | return ifnum; |
04e482ff GKH |
1070 | ret = checkintf(ps, ifnum); |
1071 | if (ret) | |
1da177e4 LT |
1072 | return ret; |
1073 | } | |
93cf9b90 AS |
1074 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1075 | is_in = 1; | |
1076 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1077 | } else { | |
1078 | is_in = 0; | |
1079 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1080 | } | |
1da177e4 LT |
1081 | if (!ep) |
1082 | return -ENOENT; | |
1083 | switch(uurb->type) { | |
1084 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1085 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1086 | return -EINVAL; |
04e482ff GKH |
1087 | /* min 8 byte setup packet, |
1088 | * max 8 byte setup plus an arbitrary data stage */ | |
1089 | if (uurb->buffer_length < 8 || | |
1090 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 1091 | return -EINVAL; |
04e482ff GKH |
1092 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1093 | if (!dr) | |
1da177e4 LT |
1094 | return -ENOMEM; |
1095 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
1096 | kfree(dr); | |
1097 | return -EFAULT; | |
1098 | } | |
1099 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
1100 | kfree(dr); | |
1101 | return -EINVAL; | |
1102 | } | |
04e482ff GKH |
1103 | ret = check_ctrlrecip(ps, dr->bRequestType, |
1104 | le16_to_cpup(&dr->wIndex)); | |
1105 | if (ret) { | |
1da177e4 LT |
1106 | kfree(dr); |
1107 | return ret; | |
1108 | } | |
1da177e4 LT |
1109 | uurb->number_of_packets = 0; |
1110 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1111 | uurb->buffer += 8; | |
93cf9b90 AS |
1112 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1113 | is_in = 1; | |
1114 | uurb->endpoint |= USB_DIR_IN; | |
1115 | } else { | |
1116 | is_in = 0; | |
1117 | uurb->endpoint &= ~USB_DIR_IN; | |
1118 | } | |
0880aef4 CF |
1119 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1120 | "bRequest=%02x wValue=%04x " | |
1121 | "wIndex=%04x wLength=%04x\n", | |
1122 | dr->bRequestType, dr->bRequest, | |
1123 | __le16_to_cpup(&dr->wValue), | |
1124 | __le16_to_cpup(&dr->wIndex), | |
1125 | __le16_to_cpup(&dr->wLength)); | |
1da177e4 LT |
1126 | break; |
1127 | ||
1128 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1129 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1130 | case USB_ENDPOINT_XFER_CONTROL: |
1131 | case USB_ENDPOINT_XFER_ISOC: | |
1132 | return -EINVAL; | |
f661c6f8 AS |
1133 | case USB_ENDPOINT_XFER_INT: |
1134 | /* allow single-shot interrupt transfers */ | |
1135 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1136 | goto interrupt_urb; | |
1da177e4 LT |
1137 | } |
1138 | uurb->number_of_packets = 0; | |
1139 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1140 | return -EINVAL; | |
1da177e4 LT |
1141 | break; |
1142 | ||
f661c6f8 AS |
1143 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1144 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1145 | return -EINVAL; | |
1146 | interrupt_urb: | |
1147 | uurb->number_of_packets = 0; | |
1148 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1149 | return -EINVAL; | |
1150 | break; | |
1151 | ||
1da177e4 LT |
1152 | case USBDEVFS_URB_TYPE_ISO: |
1153 | /* arbitrary limit */ | |
04e482ff GKH |
1154 | if (uurb->number_of_packets < 1 || |
1155 | uurb->number_of_packets > 128) | |
1da177e4 | 1156 | return -EINVAL; |
93cf9b90 | 1157 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1158 | return -EINVAL; |
04e482ff GKH |
1159 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1160 | uurb->number_of_packets; | |
1da177e4 LT |
1161 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1162 | return -ENOMEM; | |
1163 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1164 | kfree(isopkt); | |
1165 | return -EFAULT; | |
1166 | } | |
1167 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1168 | /* arbitrary limit, |
1169 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1170 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1171 | kfree(isopkt); |
1172 | return -EINVAL; | |
1173 | } | |
1174 | totlen += isopkt[u].length; | |
1175 | } | |
5971897f MR |
1176 | /* 3072 * 64 microframes */ |
1177 | if (totlen > 196608) { | |
1da177e4 LT |
1178 | kfree(isopkt); |
1179 | return -EINVAL; | |
1180 | } | |
1181 | uurb->buffer_length = totlen; | |
1182 | break; | |
1183 | ||
1da177e4 LT |
1184 | default: |
1185 | return -EINVAL; | |
1186 | } | |
9180135b AS |
1187 | if (uurb->buffer_length > 0 && |
1188 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1189 | uurb->buffer, uurb->buffer_length)) { | |
6fd19f4b JJ |
1190 | kfree(isopkt); |
1191 | kfree(dr); | |
9180135b | 1192 | return -EFAULT; |
1da177e4 | 1193 | } |
9180135b AS |
1194 | as = alloc_async(uurb->number_of_packets); |
1195 | if (!as) { | |
6fd19f4b JJ |
1196 | kfree(isopkt); |
1197 | kfree(dr); | |
1da177e4 LT |
1198 | return -ENOMEM; |
1199 | } | |
9180135b AS |
1200 | if (uurb->buffer_length > 0) { |
1201 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1202 | GFP_KERNEL); | |
1203 | if (!as->urb->transfer_buffer) { | |
1204 | kfree(isopkt); | |
1205 | kfree(dr); | |
1206 | free_async(as); | |
1207 | return -ENOMEM; | |
1208 | } | |
7152b592 AS |
1209 | /* Isochronous input data may end up being discontiguous |
1210 | * if some of the packets are short. Clear the buffer so | |
1211 | * that the gaps don't leak kernel data to userspace. | |
1212 | */ | |
1213 | if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1214 | memset(as->urb->transfer_buffer, 0, | |
1215 | uurb->buffer_length); | |
9180135b | 1216 | } |
04e482ff GKH |
1217 | as->urb->dev = ps->dev; |
1218 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1219 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1220 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1221 | |
1222 | /* This tedious sequence is necessary because the URB_* flags | |
1223 | * are internal to the kernel and subject to change, whereas | |
1224 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1225 | */ | |
1226 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1227 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1228 | u |= URB_ISO_ASAP; | |
1229 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1230 | u |= URB_SHORT_NOT_OK; | |
1231 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1232 | u |= URB_NO_FSBR; | |
1233 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1234 | u |= URB_ZERO_PACKET; | |
1235 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1236 | u |= URB_NO_INTERRUPT; | |
1237 | as->urb->transfer_flags = u; | |
1238 | ||
1da177e4 | 1239 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1240 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1241 | as->urb->start_frame = uurb->start_frame; |
1242 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1243 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1244 | ps->dev->speed == USB_SPEED_HIGH) | |
1245 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1246 | else | |
1247 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1248 | as->urb->context = as; |
1249 | as->urb->complete = async_completed; | |
1da177e4 LT |
1250 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1251 | as->urb->iso_frame_desc[u].offset = totlen; | |
1252 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1253 | totlen += isopkt[u].length; | |
1254 | } | |
6fd19f4b | 1255 | kfree(isopkt); |
1da177e4 | 1256 | as->ps = ps; |
04e482ff | 1257 | as->userurb = arg; |
9180135b | 1258 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1259 | as->userbuffer = uurb->buffer; |
1260 | else | |
1261 | as->userbuffer = NULL; | |
1262 | as->signr = uurb->signr; | |
1263 | as->ifnum = ifnum; | |
2425c08b | 1264 | as->pid = get_pid(task_pid(current)); |
86a264ab DH |
1265 | as->uid = cred->uid; |
1266 | as->euid = cred->euid; | |
7a01955f | 1267 | security_task_getsecid(current, &as->secid); |
9180135b | 1268 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1269 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1270 | uurb->buffer_length)) { |
1da177e4 LT |
1271 | free_async(as); |
1272 | return -EFAULT; | |
1273 | } | |
1274 | } | |
4c6e8971 | 1275 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 CF |
1276 | as->urb->transfer_buffer_length, 0, SUBMIT, |
1277 | is_in ? NULL : as->urb->transfer_buffer, | |
1278 | uurb->buffer_length); | |
04e482ff | 1279 | async_newpending(as); |
01c6460f AS |
1280 | |
1281 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1282 | spin_lock_irq(&ps->lock); | |
1283 | ||
1284 | /* Not exactly the endpoint address; the direction bit is | |
1285 | * shifted to the 0x10 position so that the value will be | |
1286 | * between 0 and 31. | |
1287 | */ | |
1288 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1289 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1290 | >> 3); | |
1291 | ||
1292 | /* If this bulk URB is the start of a new transfer, re-enable | |
1293 | * the endpoint. Otherwise mark it as a continuation URB. | |
1294 | */ | |
1295 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1296 | as->bulk_status = AS_CONTINUATION; | |
1297 | else | |
1298 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1299 | ||
1300 | /* Don't accept continuation URBs if the endpoint is | |
1301 | * disabled because of an earlier error. | |
1302 | */ | |
1303 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1304 | ret = -EREMOTEIO; | |
1305 | else | |
1306 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1307 | spin_unlock_irq(&ps->lock); | |
1308 | } else { | |
1309 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1310 | } | |
1311 | ||
1312 | if (ret) { | |
04e482ff GKH |
1313 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1314 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1315 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1316 | 0, ret, COMPLETE, NULL, 0); |
04e482ff GKH |
1317 | async_removepending(as); |
1318 | free_async(as); | |
1319 | return ret; | |
1320 | } | |
1321 | return 0; | |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1325 | { | |
1326 | struct usbdevfs_urb uurb; | |
1327 | ||
1328 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1329 | return -EFAULT; | |
1330 | ||
04e482ff GKH |
1331 | return proc_do_submiturb(ps, &uurb, |
1332 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1333 | arg); | |
1da177e4 LT |
1334 | } |
1335 | ||
1336 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1337 | { | |
1338 | struct async *as; | |
1339 | ||
1340 | as = async_getpending(ps, arg); | |
1341 | if (!as) | |
1342 | return -EINVAL; | |
1343 | usb_kill_urb(as->urb); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | static int processcompl(struct async *as, void __user * __user *arg) | |
1348 | { | |
1349 | struct urb *urb = as->urb; | |
1350 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1351 | void __user *addr = as->userurb; | |
1352 | unsigned int i; | |
1353 | ||
7152b592 AS |
1354 | if (as->userbuffer && urb->actual_length) { |
1355 | if (urb->number_of_packets > 0) /* Isochronous */ | |
1356 | i = urb->transfer_buffer_length; | |
1357 | else /* Non-Isoc */ | |
1358 | i = urb->actual_length; | |
1359 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, i)) | |
d794a021 | 1360 | goto err_out; |
7152b592 | 1361 | } |
e015268d | 1362 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1363 | goto err_out; |
1da177e4 | 1364 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1365 | goto err_out; |
1da177e4 | 1366 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1367 | goto err_out; |
1da177e4 | 1368 | |
93cf9b90 | 1369 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1370 | for (i = 0; i < urb->number_of_packets; i++) { |
1371 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1372 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1373 | goto err_out; |
668a9541 CL |
1374 | if (put_user(urb->iso_frame_desc[i].status, |
1375 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1376 | goto err_out; |
668a9541 | 1377 | } |
1da177e4 LT |
1378 | } |
1379 | ||
1da177e4 LT |
1380 | if (put_user(addr, (void __user * __user *)arg)) |
1381 | return -EFAULT; | |
1382 | return 0; | |
d794a021 ON |
1383 | |
1384 | err_out: | |
d794a021 | 1385 | return -EFAULT; |
1da177e4 LT |
1386 | } |
1387 | ||
04e482ff | 1388 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1389 | { |
04e482ff | 1390 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1391 | struct async *as = NULL; |
1392 | struct usb_device *dev = ps->dev; | |
1393 | ||
1394 | add_wait_queue(&ps->wait, &wait); | |
1395 | for (;;) { | |
1396 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1397 | as = async_getcompleted(ps); |
1398 | if (as) | |
1da177e4 LT |
1399 | break; |
1400 | if (signal_pending(current)) | |
1401 | break; | |
1402 | usb_unlock_device(dev); | |
1403 | schedule(); | |
1404 | usb_lock_device(dev); | |
1405 | } | |
1406 | remove_wait_queue(&ps->wait, &wait); | |
1407 | set_current_state(TASK_RUNNING); | |
1408 | return as; | |
1409 | } | |
1410 | ||
1411 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1412 | { | |
1413 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1414 | if (as) { |
1415 | int retval = processcompl(as, (void __user * __user *)arg); | |
1416 | free_async(as); | |
1417 | return retval; | |
1418 | } | |
1da177e4 LT |
1419 | if (signal_pending(current)) |
1420 | return -EINTR; | |
1421 | return -EIO; | |
1422 | } | |
1423 | ||
1424 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1425 | { | |
ddeee0b2 | 1426 | int retval; |
1da177e4 LT |
1427 | struct async *as; |
1428 | ||
ddeee0b2 LT |
1429 | as = async_getcompleted(ps); |
1430 | retval = -EAGAIN; | |
1431 | if (as) { | |
1432 | retval = processcompl(as, (void __user * __user *)arg); | |
1433 | free_async(as); | |
1434 | } | |
1435 | return retval; | |
1da177e4 LT |
1436 | } |
1437 | ||
1438 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1439 | static int proc_control_compat(struct dev_state *ps, |
1440 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1441 | { | |
1442 | struct usbdevfs_ctrltransfer __user *p; | |
1443 | __u32 udata; | |
1444 | p = compat_alloc_user_space(sizeof(*p)); | |
1445 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1446 | get_user(udata, &p32->data) || | |
1447 | put_user(compat_ptr(udata), &p->data)) | |
1448 | return -EFAULT; | |
1449 | return proc_control(ps, p); | |
1450 | } | |
1451 | ||
1452 | static int proc_bulk_compat(struct dev_state *ps, | |
1453 | struct usbdevfs_bulktransfer32 __user *p32) | |
1454 | { | |
1455 | struct usbdevfs_bulktransfer __user *p; | |
1456 | compat_uint_t n; | |
1457 | compat_caddr_t addr; | |
1458 | ||
1459 | p = compat_alloc_user_space(sizeof(*p)); | |
1460 | ||
1461 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1462 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1463 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1464 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1465 | return -EFAULT; | |
1466 | ||
1467 | return proc_bulk(ps, p); | |
1468 | } | |
1469 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1470 | { | |
1471 | struct usbdevfs_disconnectsignal32 ds; | |
1472 | ||
1473 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1474 | return -EFAULT; | |
1475 | ps->discsignr = ds.signr; | |
1476 | ps->disccontext = compat_ptr(ds.context); | |
1477 | return 0; | |
1478 | } | |
1da177e4 LT |
1479 | |
1480 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1481 | struct usbdevfs_urb32 __user *uurb) | |
1482 | { | |
1483 | __u32 uptr; | |
18753ebc MB |
1484 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1485 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1486 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1487 | __get_user(kurb->status, &uurb->status) || | |
1488 | __get_user(kurb->flags, &uurb->flags) || | |
1489 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1490 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1491 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1492 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1493 | __get_user(kurb->error_count, &uurb->error_count) || | |
1494 | __get_user(kurb->signr, &uurb->signr)) | |
1495 | return -EFAULT; | |
1496 | ||
1497 | if (__get_user(uptr, &uurb->buffer)) | |
1498 | return -EFAULT; | |
1499 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1500 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1501 | return -EFAULT; |
1502 | kurb->usercontext = compat_ptr(uptr); | |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1508 | { | |
1509 | struct usbdevfs_urb uurb; | |
1510 | ||
04e482ff | 1511 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1512 | return -EFAULT; |
1513 | ||
04e482ff GKH |
1514 | return proc_do_submiturb(ps, &uurb, |
1515 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1516 | arg); | |
1da177e4 LT |
1517 | } |
1518 | ||
1519 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1520 | { | |
1521 | struct urb *urb = as->urb; | |
1522 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1523 | void __user *addr = as->userurb; | |
1524 | unsigned int i; | |
1525 | ||
d4a4683c | 1526 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1527 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1528 | urb->actual_length)) |
1da177e4 | 1529 | return -EFAULT; |
e015268d | 1530 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1531 | return -EFAULT; |
1532 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1533 | return -EFAULT; | |
1534 | if (put_user(urb->error_count, &userurb->error_count)) | |
1535 | return -EFAULT; | |
1536 | ||
93cf9b90 | 1537 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1538 | for (i = 0; i < urb->number_of_packets; i++) { |
1539 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1540 | &userurb->iso_frame_desc[i].actual_length)) | |
1541 | return -EFAULT; | |
1542 | if (put_user(urb->iso_frame_desc[i].status, | |
1543 | &userurb->iso_frame_desc[i].status)) | |
1544 | return -EFAULT; | |
1545 | } | |
1da177e4 LT |
1546 | } |
1547 | ||
c714de5d | 1548 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1549 | return -EFAULT; |
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1554 | { | |
1555 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1556 | if (as) { |
1557 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1558 | free_async(as); | |
1559 | return retval; | |
1560 | } | |
1da177e4 LT |
1561 | if (signal_pending(current)) |
1562 | return -EINTR; | |
1563 | return -EIO; | |
1564 | } | |
1565 | ||
1566 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1567 | { | |
ddeee0b2 | 1568 | int retval; |
1da177e4 LT |
1569 | struct async *as; |
1570 | ||
ddeee0b2 LT |
1571 | retval = -EAGAIN; |
1572 | as = async_getcompleted(ps); | |
1573 | if (as) { | |
1574 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1575 | free_async(as); | |
1576 | } | |
1577 | return retval; | |
1da177e4 LT |
1578 | } |
1579 | ||
637e8a60 | 1580 | |
1da177e4 LT |
1581 | #endif |
1582 | ||
1583 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1584 | { | |
1585 | struct usbdevfs_disconnectsignal ds; | |
1586 | ||
1587 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1588 | return -EFAULT; | |
1da177e4 LT |
1589 | ps->discsignr = ds.signr; |
1590 | ps->disccontext = ds.context; | |
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1595 | { | |
1596 | unsigned int ifnum; | |
1597 | ||
1598 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1599 | return -EFAULT; | |
1600 | return claimintf(ps, ifnum); | |
1601 | } | |
1602 | ||
1603 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1604 | { | |
1605 | unsigned int ifnum; | |
1606 | int ret; | |
1607 | ||
1608 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1609 | return -EFAULT; | |
1610 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1611 | return ret; | |
1612 | destroy_async_on_interface (ps, ifnum); | |
1613 | return 0; | |
1614 | } | |
1615 | ||
c36fc889 | 1616 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1617 | { |
1da177e4 LT |
1618 | int size; |
1619 | void *buf = NULL; | |
1620 | int retval = 0; | |
1621 | struct usb_interface *intf = NULL; | |
1622 | struct usb_driver *driver = NULL; | |
1da177e4 | 1623 | |
c36fc889 | 1624 | /* alloc buffer */ |
04e482ff GKH |
1625 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1626 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1627 | return -ENOMEM; |
c36fc889 | 1628 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1629 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1630 | kfree(buf); |
1da177e4 LT |
1631 | return -EFAULT; |
1632 | } | |
1633 | } else { | |
04e482ff | 1634 | memset(buf, 0, size); |
1da177e4 LT |
1635 | } |
1636 | } | |
1637 | ||
349710c3 | 1638 | if (!connected(ps)) { |
6fd19f4b | 1639 | kfree(buf); |
1da177e4 LT |
1640 | return -ENODEV; |
1641 | } | |
1642 | ||
1643 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1644 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1645 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1646 | retval = -EINVAL; | |
c36fc889 | 1647 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1648 | |
1649 | /* disconnect kernel driver from interface */ | |
1650 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1651 | if (intf->dev.driver) { |
1652 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1653 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1654 | usb_driver_release_interface(driver, intf); |
1655 | } else | |
1656 | retval = -ENODATA; | |
1da177e4 LT |
1657 | break; |
1658 | ||
1659 | /* let kernel drivers try to (re)bind to the interface */ | |
1660 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1661 | if (!intf->dev.driver) |
1662 | retval = device_attach(&intf->dev); | |
1663 | else | |
1664 | retval = -EBUSY; | |
1da177e4 LT |
1665 | break; |
1666 | ||
1667 | /* talk directly to the interface's driver */ | |
1668 | default: | |
1da177e4 LT |
1669 | if (intf->dev.driver) |
1670 | driver = to_usb_driver(intf->dev.driver); | |
1671 | if (driver == NULL || driver->ioctl == NULL) { | |
1672 | retval = -ENOTTY; | |
1673 | } else { | |
2a9d0083 ON |
1674 | /* keep API that guarantees BKL */ |
1675 | lock_kernel(); | |
04e482ff | 1676 | retval = driver->ioctl(intf, ctl->ioctl_code, buf); |
2a9d0083 | 1677 | unlock_kernel(); |
1da177e4 LT |
1678 | if (retval == -ENOIOCTLCMD) |
1679 | retval = -ENOTTY; | |
1680 | } | |
1da177e4 LT |
1681 | } |
1682 | ||
1683 | /* cleanup and return */ | |
1684 | if (retval >= 0 | |
04e482ff | 1685 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1686 | && size > 0 |
04e482ff | 1687 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1688 | retval = -EFAULT; |
6fd19f4b JJ |
1689 | |
1690 | kfree(buf); | |
1da177e4 LT |
1691 | return retval; |
1692 | } | |
1693 | ||
c36fc889 PZ |
1694 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1695 | { | |
1696 | struct usbdevfs_ioctl ctrl; | |
1697 | ||
04e482ff | 1698 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1699 | return -EFAULT; |
1700 | return proc_ioctl(ps, &ctrl); | |
1701 | } | |
1702 | ||
1703 | #ifdef CONFIG_COMPAT | |
777da590 | 1704 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1705 | { |
1706 | struct usbdevfs_ioctl32 __user *uioc; | |
1707 | struct usbdevfs_ioctl ctrl; | |
1708 | u32 udata; | |
1709 | ||
058120d7 | 1710 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1711 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1712 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1713 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1714 | __get_user(udata, &uioc->data)) |
1715 | return -EFAULT; | |
1716 | ctrl.data = compat_ptr(udata); | |
1717 | ||
1718 | return proc_ioctl(ps, &ctrl); | |
1719 | } | |
1720 | #endif | |
1721 | ||
7cbe5dca AS |
1722 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1723 | { | |
1724 | unsigned portnum; | |
1725 | int rc; | |
1726 | ||
1727 | if (get_user(portnum, (unsigned __user *) arg)) | |
1728 | return -EFAULT; | |
1729 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1730 | if (rc == 0) | |
1731 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1732 | portnum, task_pid_nr(current), current->comm); | |
1733 | return rc; | |
1734 | } | |
1735 | ||
1736 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1737 | { | |
1738 | unsigned portnum; | |
1739 | ||
1740 | if (get_user(portnum, (unsigned __user *) arg)) | |
1741 | return -EFAULT; | |
1742 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1743 | } | |
1744 | ||
1da177e4 LT |
1745 | /* |
1746 | * NOTE: All requests here that have interface numbers as parameters | |
1747 | * are assuming that somehow the configuration has been prevented from | |
1748 | * changing. But there's no mechanism to ensure that... | |
1749 | */ | |
637e8a60 AB |
1750 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1751 | void __user *p) | |
1da177e4 | 1752 | { |
ec17cf1c | 1753 | struct dev_state *ps = file->private_data; |
637e8a60 | 1754 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 | 1755 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1756 | int ret = -ENOTTY; |
1757 | ||
1758 | if (!(file->f_mode & FMODE_WRITE)) | |
1759 | return -EPERM; | |
01412a21 | 1760 | |
1da177e4 | 1761 | usb_lock_device(dev); |
349710c3 | 1762 | if (!connected(ps)) { |
1da177e4 LT |
1763 | usb_unlock_device(dev); |
1764 | return -ENODEV; | |
1765 | } | |
1766 | ||
1767 | switch (cmd) { | |
1768 | case USBDEVFS_CONTROL: | |
441b62c1 | 1769 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1770 | ret = proc_control(ps, p); |
1771 | if (ret >= 0) | |
1772 | inode->i_mtime = CURRENT_TIME; | |
1773 | break; | |
1774 | ||
1775 | case USBDEVFS_BULK: | |
441b62c1 | 1776 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1777 | ret = proc_bulk(ps, p); |
1778 | if (ret >= 0) | |
1779 | inode->i_mtime = CURRENT_TIME; | |
1780 | break; | |
1781 | ||
1782 | case USBDEVFS_RESETEP: | |
441b62c1 | 1783 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1784 | ret = proc_resetep(ps, p); |
1785 | if (ret >= 0) | |
1786 | inode->i_mtime = CURRENT_TIME; | |
1787 | break; | |
1788 | ||
1789 | case USBDEVFS_RESET: | |
441b62c1 | 1790 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1791 | ret = proc_resetdevice(ps); |
1792 | break; | |
1793 | ||
1794 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1795 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1796 | ret = proc_clearhalt(ps, p); |
1797 | if (ret >= 0) | |
1798 | inode->i_mtime = CURRENT_TIME; | |
1799 | break; | |
1800 | ||
1801 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1802 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1803 | ret = proc_getdriver(ps, p); |
1804 | break; | |
1805 | ||
1806 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1807 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1808 | ret = proc_connectinfo(ps, p); |
1809 | break; | |
1810 | ||
1811 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1812 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1813 | ret = proc_setintf(ps, p); |
1814 | break; | |
1815 | ||
1816 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1817 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1818 | ret = proc_setconfig(ps, p); |
1819 | break; | |
1820 | ||
1821 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1822 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1823 | ret = proc_submiturb(ps, p); |
1824 | if (ret >= 0) | |
1825 | inode->i_mtime = CURRENT_TIME; | |
1826 | break; | |
1827 | ||
1828 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1829 | case USBDEVFS_CONTROL32: |
1830 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
1831 | ret = proc_control_compat(ps, p); | |
1832 | if (ret >= 0) | |
1833 | inode->i_mtime = CURRENT_TIME; | |
1834 | break; | |
1835 | ||
1836 | case USBDEVFS_BULK32: | |
1837 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
1838 | ret = proc_bulk_compat(ps, p); | |
1839 | if (ret >= 0) | |
1840 | inode->i_mtime = CURRENT_TIME; | |
1841 | break; | |
1842 | ||
1843 | case USBDEVFS_DISCSIGNAL32: | |
1844 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
1845 | ret = proc_disconnectsignal_compat(ps, p); | |
1846 | break; | |
1da177e4 LT |
1847 | |
1848 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1849 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1850 | ret = proc_submiturb_compat(ps, p); |
1851 | if (ret >= 0) | |
1852 | inode->i_mtime = CURRENT_TIME; | |
1853 | break; | |
1854 | ||
1855 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1856 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1857 | ret = proc_reapurb_compat(ps, p); |
1858 | break; | |
1859 | ||
1860 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 1861 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
1862 | ret = proc_reapurbnonblock_compat(ps, p); |
1863 | break; | |
1864 | ||
c36fc889 | 1865 | case USBDEVFS_IOCTL32: |
637e8a60 | 1866 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 1867 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1868 | break; |
1da177e4 LT |
1869 | #endif |
1870 | ||
1871 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1872 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1873 | ret = proc_unlinkurb(ps, p); |
1874 | break; | |
1875 | ||
1876 | case USBDEVFS_REAPURB: | |
441b62c1 | 1877 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1878 | ret = proc_reapurb(ps, p); |
1879 | break; | |
1880 | ||
1881 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 1882 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
1883 | ret = proc_reapurbnonblock(ps, p); |
1884 | break; | |
1885 | ||
1886 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1887 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1888 | ret = proc_disconnectsignal(ps, p); |
1889 | break; | |
1890 | ||
1891 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1892 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1893 | ret = proc_claiminterface(ps, p); |
1894 | break; | |
1895 | ||
1896 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1897 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1898 | ret = proc_releaseinterface(ps, p); |
1899 | break; | |
1900 | ||
1901 | case USBDEVFS_IOCTL: | |
441b62c1 | 1902 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1903 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1904 | break; |
7cbe5dca AS |
1905 | |
1906 | case USBDEVFS_CLAIM_PORT: | |
1907 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1908 | ret = proc_claim_port(ps, p); | |
1909 | break; | |
1910 | ||
1911 | case USBDEVFS_RELEASE_PORT: | |
1912 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1913 | ret = proc_release_port(ps, p); | |
1914 | break; | |
1da177e4 LT |
1915 | } |
1916 | usb_unlock_device(dev); | |
1917 | if (ret >= 0) | |
1918 | inode->i_atime = CURRENT_TIME; | |
1919 | return ret; | |
1920 | } | |
1921 | ||
637e8a60 AB |
1922 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
1923 | unsigned long arg) | |
1924 | { | |
1925 | int ret; | |
1926 | ||
637e8a60 | 1927 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
1928 | |
1929 | return ret; | |
1930 | } | |
1931 | ||
1932 | #ifdef CONFIG_COMPAT | |
1933 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
1934 | unsigned long arg) | |
1935 | { | |
1936 | int ret; | |
1937 | ||
637e8a60 | 1938 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
1939 | |
1940 | return ret; | |
1941 | } | |
1942 | #endif | |
1943 | ||
1da177e4 | 1944 | /* No kernel lock - fine */ |
04e482ff GKH |
1945 | static unsigned int usbdev_poll(struct file *file, |
1946 | struct poll_table_struct *wait) | |
1da177e4 | 1947 | { |
ec17cf1c TK |
1948 | struct dev_state *ps = file->private_data; |
1949 | unsigned int mask = 0; | |
1da177e4 LT |
1950 | |
1951 | poll_wait(file, &ps->wait, wait); | |
1952 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1953 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1954 | if (!connected(ps)) |
1da177e4 LT |
1955 | mask |= POLLERR | POLLHUP; |
1956 | return mask; | |
1957 | } | |
1958 | ||
9f8b17e6 | 1959 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
1960 | .owner = THIS_MODULE, |
1961 | .llseek = usbdev_lseek, | |
1962 | .read = usbdev_read, | |
1963 | .poll = usbdev_poll, | |
1964 | .unlocked_ioctl = usbdev_ioctl, | |
1965 | #ifdef CONFIG_COMPAT | |
1966 | .compat_ioctl = usbdev_compat_ioctl, | |
1967 | #endif | |
1968 | .open = usbdev_open, | |
1969 | .release = usbdev_release, | |
1da177e4 | 1970 | }; |
fbf82fd2 | 1971 | |
501950d8 | 1972 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
1973 | { |
1974 | struct dev_state *ps; | |
1975 | struct siginfo sinfo; | |
1976 | ||
1977 | while (!list_empty(&udev->filelist)) { | |
1978 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
1979 | destroy_all_async(ps); | |
1980 | wake_up_all(&ps->wait); | |
1981 | list_del_init(&ps->list); | |
1982 | if (ps->discsignr) { | |
1983 | sinfo.si_signo = ps->discsignr; | |
1984 | sinfo.si_errno = EPIPE; | |
1985 | sinfo.si_code = SI_ASYNCIO; | |
1986 | sinfo.si_addr = ps->disccontext; | |
1987 | kill_pid_info_as_uid(ps->discsignr, &sinfo, | |
1988 | ps->disc_pid, ps->disc_uid, | |
1989 | ps->disc_euid, ps->secid); | |
1990 | } | |
1991 | } | |
1992 | } | |
1993 | ||
9f8b17e6 KS |
1994 | #ifdef CONFIG_USB_DEVICE_CLASS |
1995 | static struct class *usb_classdev_class; | |
1996 | ||
1997 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 1998 | { |
e04199b2 AS |
1999 | struct device *cldev; |
2000 | ||
b0b090e5 GKH |
2001 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
2002 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
2003 | dev->devnum); | |
e04199b2 AS |
2004 | if (IS_ERR(cldev)) |
2005 | return PTR_ERR(cldev); | |
2006 | dev->usb_classdev = cldev; | |
27d39e26 | 2007 | return 0; |
fbf82fd2 KS |
2008 | } |
2009 | ||
9f8b17e6 | 2010 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 2011 | { |
e04199b2 AS |
2012 | if (dev->usb_classdev) |
2013 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
2014 | } |
2015 | ||
501950d8 AS |
2016 | #else |
2017 | #define usb_classdev_add(dev) 0 | |
2018 | #define usb_classdev_remove(dev) do {} while (0) | |
2019 | ||
2020 | #endif | |
2021 | ||
2022 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 2023 | unsigned long action, void *dev) |
a7b986b3 GKH |
2024 | { |
2025 | switch (action) { | |
2026 | case USB_DEVICE_ADD: | |
9f8b17e6 | 2027 | if (usb_classdev_add(dev)) |
27d39e26 | 2028 | return NOTIFY_BAD; |
a7b986b3 GKH |
2029 | break; |
2030 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 2031 | usb_classdev_remove(dev); |
501950d8 | 2032 | usbdev_remove(dev); |
a7b986b3 GKH |
2033 | break; |
2034 | } | |
2035 | return NOTIFY_OK; | |
2036 | } | |
2037 | ||
2038 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2039 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2040 | }; |
2041 | ||
7e7654a9 | 2042 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2043 | |
9f8b17e6 | 2044 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2045 | { |
2046 | int retval; | |
2047 | ||
fad21bdf | 2048 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2049 | "usb_device"); |
fbf82fd2 | 2050 | if (retval) { |
69a85942 | 2051 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2052 | goto out; |
2053 | } | |
9f8b17e6 | 2054 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2055 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2056 | if (retval) { |
69a85942 GKH |
2057 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2058 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2059 | goto error_cdev; |
fbf82fd2 | 2060 | } |
9f8b17e6 KS |
2061 | #ifdef CONFIG_USB_DEVICE_CLASS |
2062 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
2063 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 2064 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
2065 | retval = PTR_ERR(usb_classdev_class); |
2066 | cdev_del(&usb_device_cdev); | |
2067 | usb_classdev_class = NULL; | |
2068 | goto out; | |
fbf82fd2 | 2069 | } |
e105b8bf DW |
2070 | /* devices of this class shadow the major:minor of their parent |
2071 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
2072 | * to /sys/dev | |
2073 | */ | |
2074 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 2075 | #endif |
501950d8 | 2076 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2077 | out: |
2078 | return retval; | |
a7b986b3 | 2079 | |
a7b986b3 GKH |
2080 | error_cdev: |
2081 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2082 | goto out; | |
fbf82fd2 KS |
2083 | } |
2084 | ||
9f8b17e6 | 2085 | void usb_devio_cleanup(void) |
fbf82fd2 | 2086 | { |
a7b986b3 | 2087 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 2088 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
2089 | class_destroy(usb_classdev_class); |
2090 | #endif | |
fbf82fd2 | 2091 | cdev_del(&usb_device_cdev); |
fad21bdf | 2092 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2093 | } |