Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
40 | #include <linux/signal.h> |
41 | #include <linux/poll.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/usb.h> | |
44 | #include <linux/usbdevice_fs.h> | |
27729aad | 45 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 46 | #include <linux/cdev.h> |
a7b986b3 | 47 | #include <linux/notifier.h> |
7a01955f | 48 | #include <linux/security.h> |
1da177e4 LT |
49 | #include <asm/uaccess.h> |
50 | #include <asm/byteorder.h> | |
51 | #include <linux/moduleparam.h> | |
52 | ||
1da177e4 LT |
53 | #include "usb.h" |
54 | ||
fbf82fd2 KS |
55 | #define USB_MAXBUS 64 |
56 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
fbf82fd2 | 57 | |
4a2a8a2c AS |
58 | /* Mutual exclusion for removal, open, and release */ |
59 | DEFINE_MUTEX(usbfs_mutex); | |
60 | ||
cd9f0375 AS |
61 | struct dev_state { |
62 | struct list_head list; /* state list */ | |
63 | struct usb_device *dev; | |
64 | struct file *file; | |
65 | spinlock_t lock; /* protects the async urb lists */ | |
66 | struct list_head async_pending; | |
67 | struct list_head async_completed; | |
68 | wait_queue_head_t wait; /* wake up if a request completed */ | |
69 | unsigned int discsignr; | |
70 | struct pid *disc_pid; | |
71 | uid_t disc_uid, disc_euid; | |
72 | void __user *disccontext; | |
73 | unsigned long ifclaimed; | |
74 | u32 secid; | |
01c6460f | 75 | u32 disabled_bulk_eps; |
cd9f0375 AS |
76 | }; |
77 | ||
1da177e4 LT |
78 | struct async { |
79 | struct list_head asynclist; | |
80 | struct dev_state *ps; | |
2425c08b | 81 | struct pid *pid; |
46113830 | 82 | uid_t uid, euid; |
1da177e4 LT |
83 | unsigned int signr; |
84 | unsigned int ifnum; | |
85 | void __user *userbuffer; | |
86 | void __user *userurb; | |
87 | struct urb *urb; | |
e015268d | 88 | int status; |
7a01955f | 89 | u32 secid; |
01c6460f AS |
90 | u8 bulk_addr; |
91 | u8 bulk_status; | |
1da177e4 LT |
92 | }; |
93 | ||
04e482ff GKH |
94 | static int usbfs_snoop; |
95 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
96 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
97 | |
98 | #define snoop(dev, format, arg...) \ | |
99 | do { \ | |
100 | if (usbfs_snoop) \ | |
04e482ff | 101 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
102 | } while (0) |
103 | ||
4c6e8971 AS |
104 | enum snoop_when { |
105 | SUBMIT, COMPLETE | |
106 | }; | |
fad21bdf | 107 | |
4c6e8971 | 108 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 LT |
109 | |
110 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
111 | ||
4c6e8971 | 112 | |
d34d9721 | 113 | static int connected(struct dev_state *ps) |
1da177e4 | 114 | { |
349710c3 AS |
115 | return (!list_empty(&ps->list) && |
116 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
117 | } |
118 | ||
119 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
120 | { | |
121 | loff_t ret; | |
122 | ||
f9de332e | 123 | mutex_lock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
124 | |
125 | switch (orig) { | |
126 | case 0: | |
127 | file->f_pos = offset; | |
128 | ret = file->f_pos; | |
129 | break; | |
130 | case 1: | |
131 | file->f_pos += offset; | |
132 | ret = file->f_pos; | |
133 | break; | |
134 | case 2: | |
135 | default: | |
136 | ret = -EINVAL; | |
137 | } | |
138 | ||
f9de332e | 139 | mutex_unlock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
140 | return ret; |
141 | } | |
142 | ||
04e482ff GKH |
143 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
144 | loff_t *ppos) | |
1da177e4 | 145 | { |
ec17cf1c | 146 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
147 | struct usb_device *dev = ps->dev; |
148 | ssize_t ret = 0; | |
149 | unsigned len; | |
150 | loff_t pos; | |
151 | int i; | |
152 | ||
153 | pos = *ppos; | |
154 | usb_lock_device(dev); | |
349710c3 | 155 | if (!connected(ps)) { |
1da177e4 LT |
156 | ret = -ENODEV; |
157 | goto err; | |
158 | } else if (pos < 0) { | |
159 | ret = -EINVAL; | |
160 | goto err; | |
161 | } | |
162 | ||
163 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
164 | /* 18 bytes - fits on the stack */ |
165 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
166 | |
167 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
168 | le16_to_cpus(&temp_desc.bcdUSB); |
169 | le16_to_cpus(&temp_desc.idVendor); | |
170 | le16_to_cpus(&temp_desc.idProduct); | |
171 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
172 | |
173 | len = sizeof(struct usb_device_descriptor) - pos; | |
174 | if (len > nbytes) | |
175 | len = nbytes; | |
8781ba0a | 176 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
177 | ret = -EFAULT; |
178 | goto err; | |
179 | } | |
1da177e4 LT |
180 | |
181 | *ppos += len; | |
182 | buf += len; | |
183 | nbytes -= len; | |
184 | ret += len; | |
185 | } | |
186 | ||
187 | pos = sizeof(struct usb_device_descriptor); | |
188 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
189 | struct usb_config_descriptor *config = | |
190 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
191 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
192 | ||
193 | if (*ppos < pos + length) { | |
194 | ||
195 | /* The descriptor may claim to be longer than it | |
196 | * really is. Here is the actual allocated length. */ | |
197 | unsigned alloclen = | |
198 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
199 | ||
200 | len = length - (*ppos - pos); | |
201 | if (len > nbytes) | |
202 | len = nbytes; | |
203 | ||
204 | /* Simply don't write (skip over) unallocated parts */ | |
205 | if (alloclen > (*ppos - pos)) { | |
206 | alloclen -= (*ppos - pos); | |
207 | if (copy_to_user(buf, | |
208 | dev->rawdescriptors[i] + (*ppos - pos), | |
209 | min(len, alloclen))) { | |
210 | ret = -EFAULT; | |
211 | goto err; | |
212 | } | |
213 | } | |
214 | ||
215 | *ppos += len; | |
216 | buf += len; | |
217 | nbytes -= len; | |
218 | ret += len; | |
219 | } | |
220 | ||
221 | pos += length; | |
222 | } | |
223 | ||
224 | err: | |
225 | usb_unlock_device(dev); | |
226 | return ret; | |
227 | } | |
228 | ||
229 | /* | |
230 | * async list handling | |
231 | */ | |
232 | ||
233 | static struct async *alloc_async(unsigned int numisoframes) | |
234 | { | |
dd95b814 | 235 | struct async *as; |
0a1ef3b5 | 236 | |
dd95b814 | 237 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
238 | if (!as) |
239 | return NULL; | |
1da177e4 LT |
240 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
241 | if (!as->urb) { | |
242 | kfree(as); | |
243 | return NULL; | |
244 | } | |
04e482ff | 245 | return as; |
1da177e4 LT |
246 | } |
247 | ||
248 | static void free_async(struct async *as) | |
249 | { | |
2425c08b | 250 | put_pid(as->pid); |
6fd19f4b JJ |
251 | kfree(as->urb->transfer_buffer); |
252 | kfree(as->urb->setup_packet); | |
1da177e4 | 253 | usb_free_urb(as->urb); |
6fd19f4b | 254 | kfree(as); |
1da177e4 LT |
255 | } |
256 | ||
d34d9721 | 257 | static void async_newpending(struct async *as) |
1da177e4 | 258 | { |
04e482ff GKH |
259 | struct dev_state *ps = as->ps; |
260 | unsigned long flags; | |
261 | ||
262 | spin_lock_irqsave(&ps->lock, flags); | |
263 | list_add_tail(&as->asynclist, &ps->async_pending); | |
264 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
265 | } |
266 | ||
d34d9721 | 267 | static void async_removepending(struct async *as) |
1da177e4 | 268 | { |
04e482ff GKH |
269 | struct dev_state *ps = as->ps; |
270 | unsigned long flags; | |
271 | ||
272 | spin_lock_irqsave(&ps->lock, flags); | |
273 | list_del_init(&as->asynclist); | |
274 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
275 | } |
276 | ||
d34d9721 | 277 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 278 | { |
04e482ff GKH |
279 | unsigned long flags; |
280 | struct async *as = NULL; | |
281 | ||
282 | spin_lock_irqsave(&ps->lock, flags); | |
283 | if (!list_empty(&ps->async_completed)) { | |
284 | as = list_entry(ps->async_completed.next, struct async, | |
285 | asynclist); | |
286 | list_del_init(&as->asynclist); | |
287 | } | |
288 | spin_unlock_irqrestore(&ps->lock, flags); | |
289 | return as; | |
1da177e4 LT |
290 | } |
291 | ||
d34d9721 | 292 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 293 | void __user *userurb) |
1da177e4 | 294 | { |
04e482ff GKH |
295 | unsigned long flags; |
296 | struct async *as; | |
1da177e4 | 297 | |
04e482ff | 298 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
299 | list_for_each_entry(as, &ps->async_pending, asynclist) |
300 | if (as->userurb == userurb) { | |
301 | list_del_init(&as->asynclist); | |
302 | spin_unlock_irqrestore(&ps->lock, flags); | |
303 | return as; | |
304 | } | |
04e482ff GKH |
305 | spin_unlock_irqrestore(&ps->lock, flags); |
306 | return NULL; | |
1da177e4 LT |
307 | } |
308 | ||
4c6e8971 AS |
309 | static void snoop_urb(struct usb_device *udev, |
310 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
311 | int timeout_or_status, enum snoop_when when, |
312 | unsigned char *data, unsigned data_len) | |
e639dd3f | 313 | { |
4c6e8971 AS |
314 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
315 | static const char *dirs[] = {"out", "in"}; | |
316 | int ep; | |
317 | const char *t, *d; | |
e639dd3f GKH |
318 | |
319 | if (!usbfs_snoop) | |
320 | return; | |
321 | ||
4c6e8971 AS |
322 | ep = usb_pipeendpoint(pipe); |
323 | t = types[usb_pipetype(pipe)]; | |
324 | d = dirs[!!usb_pipein(pipe)]; | |
325 | ||
326 | if (userurb) { /* Async */ | |
327 | if (when == SUBMIT) | |
328 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
329 | "length %u\n", | |
330 | userurb, ep, t, d, length); | |
331 | else | |
332 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
333 | "actual_length %u status %d\n", | |
334 | userurb, ep, t, d, length, | |
335 | timeout_or_status); | |
336 | } else { | |
337 | if (when == SUBMIT) | |
338 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
339 | "timeout %d\n", | |
340 | ep, t, d, length, timeout_or_status); | |
341 | else | |
342 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
343 | "status %d\n", | |
344 | ep, t, d, length, timeout_or_status); | |
345 | } | |
0880aef4 CF |
346 | |
347 | if (data && data_len > 0) { | |
348 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
349 | data, data_len, 1); | |
350 | } | |
e639dd3f GKH |
351 | } |
352 | ||
01c6460f AS |
353 | #define AS_CONTINUATION 1 |
354 | #define AS_UNLINK 2 | |
355 | ||
356 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
357 | __releases(ps->lock) | |
358 | __acquires(ps->lock) | |
359 | { | |
360 | struct async *as; | |
361 | ||
362 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
363 | * including the first one without AS_CONTINUATION. If such an | |
364 | * URB is encountered then a new transfer has already started so | |
365 | * the endpoint doesn't need to be disabled; otherwise it does. | |
366 | */ | |
367 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
368 | if (as->bulk_addr == bulk_addr) { | |
369 | if (as->bulk_status != AS_CONTINUATION) | |
370 | goto rescan; | |
371 | as->bulk_status = AS_UNLINK; | |
372 | as->bulk_addr = 0; | |
373 | } | |
374 | } | |
375 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
376 | ||
377 | /* Now carefully unlink all the marked pending URBs */ | |
378 | rescan: | |
379 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
380 | if (as->bulk_status == AS_UNLINK) { | |
381 | as->bulk_status = 0; /* Only once */ | |
382 | spin_unlock(&ps->lock); /* Allow completions */ | |
383 | usb_unlink_urb(as->urb); | |
384 | spin_lock(&ps->lock); | |
385 | goto rescan; | |
386 | } | |
387 | } | |
388 | } | |
389 | ||
7d12e780 | 390 | static void async_completed(struct urb *urb) |
1da177e4 | 391 | { |
04e482ff GKH |
392 | struct async *as = urb->context; |
393 | struct dev_state *ps = as->ps; | |
1da177e4 | 394 | struct siginfo sinfo; |
516a1a07 ON |
395 | struct pid *pid = NULL; |
396 | uid_t uid = 0; | |
397 | uid_t euid = 0; | |
398 | u32 secid = 0; | |
399 | int signr; | |
1da177e4 | 400 | |
04e482ff GKH |
401 | spin_lock(&ps->lock); |
402 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 403 | as->status = urb->status; |
516a1a07 ON |
404 | signr = as->signr; |
405 | if (signr) { | |
1da177e4 | 406 | sinfo.si_signo = as->signr; |
e015268d | 407 | sinfo.si_errno = as->status; |
1da177e4 LT |
408 | sinfo.si_code = SI_ASYNCIO; |
409 | sinfo.si_addr = as->userurb; | |
aec01c58 | 410 | pid = get_pid(as->pid); |
516a1a07 ON |
411 | uid = as->uid; |
412 | euid = as->euid; | |
413 | secid = as->secid; | |
1da177e4 | 414 | } |
e639dd3f | 415 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 416 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
0880aef4 CF |
417 | as->status, COMPLETE, |
418 | ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ? | |
419 | NULL : urb->transfer_buffer, urb->actual_length); | |
01c6460f AS |
420 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
421 | as->status != -ENOENT) | |
422 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
423 | spin_unlock(&ps->lock); |
424 | ||
aec01c58 | 425 | if (signr) { |
516a1a07 ON |
426 | kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid, |
427 | euid, secid); | |
aec01c58 SH |
428 | put_pid(pid); |
429 | } | |
516a1a07 | 430 | |
e639dd3f | 431 | wake_up(&ps->wait); |
1da177e4 LT |
432 | } |
433 | ||
04e482ff | 434 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
435 | { |
436 | struct async *as; | |
437 | unsigned long flags; | |
438 | ||
439 | spin_lock_irqsave(&ps->lock, flags); | |
440 | while (!list_empty(list)) { | |
441 | as = list_entry(list->next, struct async, asynclist); | |
442 | list_del_init(&as->asynclist); | |
443 | ||
444 | /* drop the spinlock so the completion handler can run */ | |
445 | spin_unlock_irqrestore(&ps->lock, flags); | |
446 | usb_kill_urb(as->urb); | |
447 | spin_lock_irqsave(&ps->lock, flags); | |
448 | } | |
449 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
450 | } |
451 | ||
04e482ff GKH |
452 | static void destroy_async_on_interface(struct dev_state *ps, |
453 | unsigned int ifnum) | |
1da177e4 LT |
454 | { |
455 | struct list_head *p, *q, hitlist; | |
456 | unsigned long flags; | |
457 | ||
458 | INIT_LIST_HEAD(&hitlist); | |
459 | spin_lock_irqsave(&ps->lock, flags); | |
460 | list_for_each_safe(p, q, &ps->async_pending) | |
461 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
462 | list_move_tail(p, &hitlist); | |
463 | spin_unlock_irqrestore(&ps->lock, flags); | |
464 | destroy_async(ps, &hitlist); | |
465 | } | |
466 | ||
d34d9721 | 467 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 468 | { |
04e482ff | 469 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
470 | } |
471 | ||
472 | /* | |
473 | * interface claims are made only at the request of user level code, | |
474 | * which can also release them (explicitly or by closing files). | |
475 | * they're also undone when devices disconnect. | |
476 | */ | |
477 | ||
04e482ff GKH |
478 | static int driver_probe(struct usb_interface *intf, |
479 | const struct usb_device_id *id) | |
1da177e4 LT |
480 | { |
481 | return -ENODEV; | |
482 | } | |
483 | ||
484 | static void driver_disconnect(struct usb_interface *intf) | |
485 | { | |
04e482ff | 486 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
487 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
488 | ||
489 | if (!ps) | |
490 | return; | |
491 | ||
492 | /* NOTE: this relies on usbcore having canceled and completed | |
493 | * all pending I/O requests; 2.6 does that. | |
494 | */ | |
495 | ||
496 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
497 | clear_bit(ifnum, &ps->ifclaimed); | |
498 | else | |
3b6004f3 GKH |
499 | dev_warn(&intf->dev, "interface number %u out of range\n", |
500 | ifnum); | |
1da177e4 | 501 | |
04e482ff | 502 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
503 | |
504 | /* force async requests to complete */ | |
505 | destroy_async_on_interface(ps, ifnum); | |
506 | } | |
507 | ||
2e2eb83f AS |
508 | /* The following routines are merely placeholders. There is no way |
509 | * to inform a user task about suspend or resumes. | |
510 | */ | |
511 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
512 | { | |
513 | return 0; | |
514 | } | |
515 | ||
516 | static int driver_resume(struct usb_interface *intf) | |
517 | { | |
518 | return 0; | |
519 | } | |
520 | ||
1da177e4 | 521 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
522 | .name = "usbfs", |
523 | .probe = driver_probe, | |
524 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
525 | .suspend = driver_suspend, |
526 | .resume = driver_resume, | |
1da177e4 LT |
527 | }; |
528 | ||
529 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
530 | { | |
531 | struct usb_device *dev = ps->dev; | |
532 | struct usb_interface *intf; | |
533 | int err; | |
534 | ||
535 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
536 | return -EINVAL; | |
537 | /* already claimed */ | |
538 | if (test_bit(ifnum, &ps->ifclaimed)) | |
539 | return 0; | |
540 | ||
1da177e4 LT |
541 | intf = usb_ifnum_to_if(dev, ifnum); |
542 | if (!intf) | |
543 | err = -ENOENT; | |
544 | else | |
545 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
546 | if (err == 0) |
547 | set_bit(ifnum, &ps->ifclaimed); | |
548 | return err; | |
549 | } | |
550 | ||
551 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
552 | { | |
553 | struct usb_device *dev; | |
554 | struct usb_interface *intf; | |
555 | int err; | |
556 | ||
557 | err = -EINVAL; | |
558 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
559 | return err; | |
560 | dev = ps->dev; | |
1da177e4 LT |
561 | intf = usb_ifnum_to_if(dev, ifnum); |
562 | if (!intf) | |
563 | err = -ENOENT; | |
564 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
565 | usb_driver_release_interface(&usbfs_driver, intf); | |
566 | err = 0; | |
567 | } | |
1da177e4 LT |
568 | return err; |
569 | } | |
570 | ||
571 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
572 | { | |
573 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
574 | return -EHOSTUNREACH; | |
575 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
576 | return -EINVAL; | |
577 | if (test_bit(ifnum, &ps->ifclaimed)) | |
578 | return 0; | |
579 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
580 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
581 | "interface %u before use\n", task_pid_nr(current), | |
582 | current->comm, ifnum); | |
1da177e4 LT |
583 | return claimintf(ps, ifnum); |
584 | } | |
585 | ||
586 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
587 | { | |
588 | unsigned int i, j, e; | |
04e482ff | 589 | struct usb_interface *intf; |
1da177e4 LT |
590 | struct usb_host_interface *alts; |
591 | struct usb_endpoint_descriptor *endpt; | |
592 | ||
593 | if (ep & ~(USB_DIR_IN|0xf)) | |
594 | return -EINVAL; | |
595 | if (!dev->actconfig) | |
596 | return -ESRCH; | |
597 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
598 | intf = dev->actconfig->interface[i]; | |
599 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 600 | alts = &intf->altsetting[j]; |
1da177e4 LT |
601 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
602 | endpt = &alts->endpoint[e].desc; | |
603 | if (endpt->bEndpointAddress == ep) | |
604 | return alts->desc.bInterfaceNumber; | |
605 | } | |
606 | } | |
607 | } | |
04e482ff | 608 | return -ENOENT; |
1da177e4 LT |
609 | } |
610 | ||
04e482ff | 611 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
393cbb51 | 612 | unsigned int request, unsigned int index) |
1da177e4 LT |
613 | { |
614 | int ret = 0; | |
393cbb51 | 615 | struct usb_host_interface *alt_setting; |
1da177e4 | 616 | |
6da9c990 DV |
617 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
618 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 619 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
620 | return -EHOSTUNREACH; |
621 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
622 | return 0; | |
623 | ||
393cbb51 MD |
624 | /* |
625 | * check for the special corner case 'get_device_id' in the printer | |
626 | * class specification, where wIndex is (interface << 8 | altsetting) | |
627 | * instead of just interface | |
628 | */ | |
629 | if (requesttype == 0xa1 && request == 0) { | |
630 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
631 | index >> 8, index & 0xff); | |
632 | if (alt_setting | |
633 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
634 | index >>= 8; | |
635 | } | |
636 | ||
1da177e4 LT |
637 | index &= 0xff; |
638 | switch (requesttype & USB_RECIP_MASK) { | |
639 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
640 | ret = findintfep(ps->dev, index); |
641 | if (ret >= 0) | |
1da177e4 LT |
642 | ret = checkintf(ps, ret); |
643 | break; | |
644 | ||
645 | case USB_RECIP_INTERFACE: | |
646 | ret = checkintf(ps, index); | |
647 | break; | |
648 | } | |
649 | return ret; | |
650 | } | |
651 | ||
61ad04a8 | 652 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 653 | { |
a80d5ff0 | 654 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 655 | } |
4592bf5a | 656 | |
61ad04a8 | 657 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
658 | { |
659 | struct device *dev; | |
660 | ||
a80d5ff0 DH |
661 | dev = bus_find_device(&usb_bus_type, NULL, |
662 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
663 | if (!dev) |
664 | return NULL; | |
9f8b17e6 KS |
665 | return container_of(dev, struct usb_device, dev); |
666 | } | |
4592bf5a | 667 | |
1da177e4 LT |
668 | /* |
669 | * file operations | |
670 | */ | |
671 | static int usbdev_open(struct inode *inode, struct file *file) | |
672 | { | |
fbf82fd2 | 673 | struct usb_device *dev = NULL; |
1da177e4 | 674 | struct dev_state *ps; |
86a264ab | 675 | const struct cred *cred = current_cred(); |
1da177e4 LT |
676 | int ret; |
677 | ||
1da177e4 | 678 | ret = -ENOMEM; |
04e482ff GKH |
679 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
680 | if (!ps) | |
62e299e6 | 681 | goto out_free_ps; |
1da177e4 | 682 | |
01105a24 | 683 | ret = -ENODEV; |
61ad04a8 | 684 | |
62e299e6 AS |
685 | /* Protect against simultaneous removal or release */ |
686 | mutex_lock(&usbfs_mutex); | |
687 | ||
9f8b17e6 | 688 | /* usbdev device-node */ |
fbf82fd2 | 689 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 690 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 691 | |
9f8b17e6 KS |
692 | #ifdef CONFIG_USB_DEVICEFS |
693 | /* procfs file */ | |
d64aac36 | 694 | if (!dev) { |
8e18e294 | 695 | dev = inode->i_private; |
d64aac36 AS |
696 | if (dev && dev->usbfs_dentry && |
697 | dev->usbfs_dentry->d_inode == inode) | |
698 | usb_get_dev(dev); | |
699 | else | |
700 | dev = NULL; | |
701 | } | |
9f8b17e6 | 702 | #endif |
62e299e6 AS |
703 | mutex_unlock(&usbfs_mutex); |
704 | ||
705 | if (!dev) | |
706 | goto out_free_ps; | |
707 | ||
708 | usb_lock_device(dev); | |
709 | if (dev->state == USB_STATE_NOTATTACHED) | |
710 | goto out_unlock_device; | |
711 | ||
94fcda1f | 712 | ret = usb_autoresume_device(dev); |
01d883d4 | 713 | if (ret) |
62e299e6 | 714 | goto out_unlock_device; |
01d883d4 | 715 | |
1da177e4 LT |
716 | ps->dev = dev; |
717 | ps->file = file; | |
718 | spin_lock_init(&ps->lock); | |
316547fd | 719 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
720 | INIT_LIST_HEAD(&ps->async_pending); |
721 | INIT_LIST_HEAD(&ps->async_completed); | |
722 | init_waitqueue_head(&ps->wait); | |
723 | ps->discsignr = 0; | |
2425c08b | 724 | ps->disc_pid = get_pid(task_pid(current)); |
86a264ab DH |
725 | ps->disc_uid = cred->uid; |
726 | ps->disc_euid = cred->euid; | |
1da177e4 LT |
727 | ps->disccontext = NULL; |
728 | ps->ifclaimed = 0; | |
7a01955f | 729 | security_task_getsecid(current, &ps->secid); |
527660a8 | 730 | smp_wmb(); |
1da177e4 LT |
731 | list_add_tail(&ps->list, &dev->filelist); |
732 | file->private_data = ps; | |
62e299e6 | 733 | usb_unlock_device(dev); |
2da41d5f AS |
734 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
735 | current->comm); | |
62e299e6 AS |
736 | return ret; |
737 | ||
738 | out_unlock_device: | |
739 | usb_unlock_device(dev); | |
740 | usb_put_dev(dev); | |
741 | out_free_ps: | |
742 | kfree(ps); | |
4a2a8a2c | 743 | return ret; |
1da177e4 LT |
744 | } |
745 | ||
746 | static int usbdev_release(struct inode *inode, struct file *file) | |
747 | { | |
ec17cf1c | 748 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
749 | struct usb_device *dev = ps->dev; |
750 | unsigned int ifnum; | |
6ff10464 | 751 | struct async *as; |
1da177e4 LT |
752 | |
753 | usb_lock_device(dev); | |
7cbe5dca | 754 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 755 | |
1da177e4 | 756 | list_del_init(&ps->list); |
4a2a8a2c | 757 | |
1da177e4 LT |
758 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
759 | ifnum++) { | |
760 | if (test_bit(ifnum, &ps->ifclaimed)) | |
761 | releaseintf(ps, ifnum); | |
762 | } | |
763 | destroy_all_async(ps); | |
94fcda1f | 764 | usb_autosuspend_device(dev); |
1da177e4 LT |
765 | usb_unlock_device(dev); |
766 | usb_put_dev(dev); | |
2425c08b | 767 | put_pid(ps->disc_pid); |
6ff10464 AS |
768 | |
769 | as = async_getcompleted(ps); | |
770 | while (as) { | |
771 | free_async(as); | |
772 | as = async_getcompleted(ps); | |
773 | } | |
1da177e4 | 774 | kfree(ps); |
4a2a8a2c | 775 | return 0; |
1da177e4 LT |
776 | } |
777 | ||
778 | static int proc_control(struct dev_state *ps, void __user *arg) | |
779 | { | |
780 | struct usb_device *dev = ps->dev; | |
781 | struct usbdevfs_ctrltransfer ctrl; | |
782 | unsigned int tmo; | |
783 | unsigned char *tbuf; | |
ff66e3ce | 784 | unsigned wLength; |
4c6e8971 | 785 | int i, pipe, ret; |
1da177e4 LT |
786 | |
787 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
788 | return -EFAULT; | |
393cbb51 MD |
789 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
790 | ctrl.wIndex); | |
04e482ff | 791 | if (ret) |
1da177e4 | 792 | return ret; |
ff66e3ce AM |
793 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
794 | if (wLength > PAGE_SIZE) | |
1da177e4 | 795 | return -EINVAL; |
04e482ff GKH |
796 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
797 | if (!tbuf) | |
1da177e4 LT |
798 | return -ENOMEM; |
799 | tmo = ctrl.timeout; | |
0880aef4 CF |
800 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
801 | "bRequest=%02x wValue=%04x " | |
802 | "wIndex=%04x wLength=%04x\n", | |
803 | ctrl.bRequestType, ctrl.bRequest, | |
804 | __le16_to_cpup(&ctrl.wValue), | |
805 | __le16_to_cpup(&ctrl.wIndex), | |
806 | __le16_to_cpup(&ctrl.wLength)); | |
1da177e4 | 807 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
808 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
809 | ctrl.wLength)) { | |
1da177e4 LT |
810 | free_page((unsigned long)tbuf); |
811 | return -EINVAL; | |
812 | } | |
4c6e8971 | 813 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 814 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
815 | |
816 | usb_unlock_device(dev); | |
4c6e8971 | 817 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
818 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
819 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 820 | usb_lock_device(dev); |
0880aef4 | 821 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 822 | tbuf, max(i, 0)); |
1da177e4 | 823 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 824 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
825 | free_page((unsigned long)tbuf); |
826 | return -EFAULT; | |
827 | } | |
828 | } | |
829 | } else { | |
830 | if (ctrl.wLength) { | |
831 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
832 | free_page((unsigned long)tbuf); | |
833 | return -EFAULT; | |
834 | } | |
835 | } | |
4c6e8971 | 836 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
837 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
838 | tbuf, ctrl.wLength); | |
4c6e8971 | 839 | |
1da177e4 | 840 | usb_unlock_device(dev); |
04e482ff GKH |
841 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
842 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
843 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 844 | usb_lock_device(dev); |
0880aef4 | 845 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 LT |
846 | } |
847 | free_page((unsigned long)tbuf); | |
04e482ff | 848 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
849 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
850 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
851 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
852 | ctrl.wLength, i); | |
853 | } | |
854 | return i; | |
855 | } | |
856 | ||
857 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
858 | { | |
859 | struct usb_device *dev = ps->dev; | |
860 | struct usbdevfs_bulktransfer bulk; | |
861 | unsigned int tmo, len1, pipe; | |
862 | int len2; | |
863 | unsigned char *tbuf; | |
4c6e8971 | 864 | int i, ret; |
1da177e4 LT |
865 | |
866 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
867 | return -EFAULT; | |
04e482ff GKH |
868 | ret = findintfep(ps->dev, bulk.ep); |
869 | if (ret < 0) | |
1da177e4 | 870 | return ret; |
04e482ff GKH |
871 | ret = checkintf(ps, ret); |
872 | if (ret) | |
1da177e4 LT |
873 | return ret; |
874 | if (bulk.ep & USB_DIR_IN) | |
875 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
876 | else | |
877 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
878 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
879 | return -EINVAL; | |
880 | len1 = bulk.len; | |
881 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
882 | return -EINVAL; | |
883 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
884 | return -ENOMEM; | |
885 | tmo = bulk.timeout; | |
886 | if (bulk.ep & 0x80) { | |
887 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
888 | kfree(tbuf); | |
889 | return -EINVAL; | |
890 | } | |
0880aef4 | 891 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 892 | |
1da177e4 LT |
893 | usb_unlock_device(dev); |
894 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
895 | usb_lock_device(dev); | |
0880aef4 | 896 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 897 | |
1da177e4 LT |
898 | if (!i && len2) { |
899 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
900 | kfree(tbuf); | |
901 | return -EFAULT; | |
902 | } | |
903 | } | |
904 | } else { | |
905 | if (len1) { | |
906 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
907 | kfree(tbuf); | |
908 | return -EFAULT; | |
909 | } | |
910 | } | |
0880aef4 | 911 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 912 | |
1da177e4 LT |
913 | usb_unlock_device(dev); |
914 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
915 | usb_lock_device(dev); | |
0880aef4 | 916 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 LT |
917 | } |
918 | kfree(tbuf); | |
919 | if (i < 0) | |
920 | return i; | |
921 | return len2; | |
922 | } | |
923 | ||
924 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
925 | { | |
926 | unsigned int ep; | |
927 | int ret; | |
928 | ||
929 | if (get_user(ep, (unsigned int __user *)arg)) | |
930 | return -EFAULT; | |
04e482ff GKH |
931 | ret = findintfep(ps->dev, ep); |
932 | if (ret < 0) | |
1da177e4 | 933 | return ret; |
04e482ff GKH |
934 | ret = checkintf(ps, ret); |
935 | if (ret) | |
1da177e4 | 936 | return ret; |
3444b26a | 937 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
938 | return 0; |
939 | } | |
940 | ||
941 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
942 | { | |
943 | unsigned int ep; | |
944 | int pipe; | |
945 | int ret; | |
946 | ||
947 | if (get_user(ep, (unsigned int __user *)arg)) | |
948 | return -EFAULT; | |
04e482ff GKH |
949 | ret = findintfep(ps->dev, ep); |
950 | if (ret < 0) | |
1da177e4 | 951 | return ret; |
04e482ff GKH |
952 | ret = checkintf(ps, ret); |
953 | if (ret) | |
1da177e4 LT |
954 | return ret; |
955 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
956 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
957 | else | |
958 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
959 | |
960 | return usb_clear_halt(ps->dev, pipe); | |
961 | } | |
1da177e4 LT |
962 | |
963 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
964 | { | |
965 | struct usbdevfs_getdriver gd; | |
966 | struct usb_interface *intf; | |
967 | int ret; | |
968 | ||
969 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
970 | return -EFAULT; | |
1da177e4 LT |
971 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
972 | if (!intf || !intf->dev.driver) | |
973 | ret = -ENODATA; | |
974 | else { | |
975 | strncpy(gd.driver, intf->dev.driver->name, | |
976 | sizeof(gd.driver)); | |
977 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
978 | } | |
1da177e4 LT |
979 | return ret; |
980 | } | |
981 | ||
982 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
983 | { | |
886ccd45 VK |
984 | struct usbdevfs_connectinfo ci = { |
985 | .devnum = ps->dev->devnum, | |
986 | .slow = ps->dev->speed == USB_SPEED_LOW | |
987 | }; | |
1da177e4 | 988 | |
1da177e4 LT |
989 | if (copy_to_user(arg, &ci, sizeof(ci))) |
990 | return -EFAULT; | |
991 | return 0; | |
992 | } | |
993 | ||
994 | static int proc_resetdevice(struct dev_state *ps) | |
995 | { | |
742120c6 | 996 | return usb_reset_device(ps->dev); |
1da177e4 LT |
997 | } |
998 | ||
999 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
1000 | { | |
1001 | struct usbdevfs_setinterface setintf; | |
1002 | int ret; | |
1003 | ||
1004 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1005 | return -EFAULT; | |
1006 | if ((ret = checkintf(ps, setintf.interface))) | |
1007 | return ret; | |
1008 | return usb_set_interface(ps->dev, setintf.interface, | |
1009 | setintf.altsetting); | |
1010 | } | |
1011 | ||
1012 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
1013 | { | |
3f141e2a | 1014 | int u; |
1da177e4 | 1015 | int status = 0; |
04e482ff | 1016 | struct usb_host_config *actconfig; |
1da177e4 | 1017 | |
3f141e2a | 1018 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1019 | return -EFAULT; |
1020 | ||
04e482ff GKH |
1021 | actconfig = ps->dev->actconfig; |
1022 | ||
1023 | /* Don't touch the device if any interfaces are claimed. | |
1024 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1025 | * an interface is claimed by usbfs it could easily deadlock. |
1026 | */ | |
04e482ff GKH |
1027 | if (actconfig) { |
1028 | int i; | |
1029 | ||
1030 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1031 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1032 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1033 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1034 | "while '%s' sets config #%d\n", |
1035 | actconfig->interface[i] | |
1036 | ->cur_altsetting | |
1037 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1038 | actconfig->interface[i] |
1039 | ->dev.driver->name, | |
1da177e4 | 1040 | current->comm, u); |
04e482ff | 1041 | status = -EBUSY; |
1da177e4 | 1042 | break; |
1da177e4 | 1043 | } |
04e482ff GKH |
1044 | } |
1045 | } | |
1da177e4 LT |
1046 | |
1047 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1048 | * so avoid usb_set_configuration()'s kick to sysfs | |
1049 | */ | |
1050 | if (status == 0) { | |
1051 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1052 | status = usb_reset_configuration(ps->dev); | |
1053 | else | |
1054 | status = usb_set_configuration(ps->dev, u); | |
1055 | } | |
1056 | ||
1057 | return status; | |
1058 | } | |
1059 | ||
1da177e4 | 1060 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1061 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1062 | void __user *arg) | |
1da177e4 LT |
1063 | { |
1064 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1065 | struct usb_host_endpoint *ep; | |
1066 | struct async *as; | |
1067 | struct usb_ctrlrequest *dr = NULL; | |
86a264ab | 1068 | const struct cred *cred = current_cred(); |
1da177e4 | 1069 | unsigned int u, totlen, isofrmlen; |
97b9eb91 | 1070 | int ret, ifnum = -1; |
93cf9b90 | 1071 | int is_in; |
1da177e4 | 1072 | |
14722ef4 AS |
1073 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1074 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1075 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1076 | USBDEVFS_URB_NO_FSBR | |
1077 | USBDEVFS_URB_ZERO_PACKET | | |
1078 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1079 | return -EINVAL; |
9180135b | 1080 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1081 | return -EINVAL; |
04e482ff GKH |
1082 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1083 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1084 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1085 | if (ifnum < 0) | |
1da177e4 | 1086 | return ifnum; |
04e482ff GKH |
1087 | ret = checkintf(ps, ifnum); |
1088 | if (ret) | |
1da177e4 LT |
1089 | return ret; |
1090 | } | |
93cf9b90 AS |
1091 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1092 | is_in = 1; | |
1093 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1094 | } else { | |
1095 | is_in = 0; | |
1096 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1097 | } | |
1da177e4 LT |
1098 | if (!ep) |
1099 | return -ENOENT; | |
1100 | switch(uurb->type) { | |
1101 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1102 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1103 | return -EINVAL; |
04e482ff GKH |
1104 | /* min 8 byte setup packet, |
1105 | * max 8 byte setup plus an arbitrary data stage */ | |
1106 | if (uurb->buffer_length < 8 || | |
1107 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 1108 | return -EINVAL; |
04e482ff GKH |
1109 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1110 | if (!dr) | |
1da177e4 LT |
1111 | return -ENOMEM; |
1112 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
1113 | kfree(dr); | |
1114 | return -EFAULT; | |
1115 | } | |
1116 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
1117 | kfree(dr); | |
1118 | return -EINVAL; | |
1119 | } | |
393cbb51 | 1120 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff GKH |
1121 | le16_to_cpup(&dr->wIndex)); |
1122 | if (ret) { | |
1da177e4 LT |
1123 | kfree(dr); |
1124 | return ret; | |
1125 | } | |
1da177e4 LT |
1126 | uurb->number_of_packets = 0; |
1127 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1128 | uurb->buffer += 8; | |
93cf9b90 AS |
1129 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1130 | is_in = 1; | |
1131 | uurb->endpoint |= USB_DIR_IN; | |
1132 | } else { | |
1133 | is_in = 0; | |
1134 | uurb->endpoint &= ~USB_DIR_IN; | |
1135 | } | |
0880aef4 CF |
1136 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1137 | "bRequest=%02x wValue=%04x " | |
1138 | "wIndex=%04x wLength=%04x\n", | |
1139 | dr->bRequestType, dr->bRequest, | |
1140 | __le16_to_cpup(&dr->wValue), | |
1141 | __le16_to_cpup(&dr->wIndex), | |
1142 | __le16_to_cpup(&dr->wLength)); | |
1da177e4 LT |
1143 | break; |
1144 | ||
1145 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1146 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1147 | case USB_ENDPOINT_XFER_CONTROL: |
1148 | case USB_ENDPOINT_XFER_ISOC: | |
1149 | return -EINVAL; | |
f661c6f8 AS |
1150 | case USB_ENDPOINT_XFER_INT: |
1151 | /* allow single-shot interrupt transfers */ | |
1152 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1153 | goto interrupt_urb; | |
1da177e4 LT |
1154 | } |
1155 | uurb->number_of_packets = 0; | |
1156 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1157 | return -EINVAL; | |
1da177e4 LT |
1158 | break; |
1159 | ||
f661c6f8 AS |
1160 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1161 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1162 | return -EINVAL; | |
1163 | interrupt_urb: | |
1164 | uurb->number_of_packets = 0; | |
1165 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1166 | return -EINVAL; | |
1167 | break; | |
1168 | ||
1da177e4 LT |
1169 | case USBDEVFS_URB_TYPE_ISO: |
1170 | /* arbitrary limit */ | |
04e482ff GKH |
1171 | if (uurb->number_of_packets < 1 || |
1172 | uurb->number_of_packets > 128) | |
1da177e4 | 1173 | return -EINVAL; |
93cf9b90 | 1174 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1175 | return -EINVAL; |
04e482ff GKH |
1176 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1177 | uurb->number_of_packets; | |
1da177e4 LT |
1178 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1179 | return -ENOMEM; | |
1180 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1181 | kfree(isopkt); | |
1182 | return -EFAULT; | |
1183 | } | |
1184 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1185 | /* arbitrary limit, |
1186 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1187 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1188 | kfree(isopkt); |
1189 | return -EINVAL; | |
1190 | } | |
1191 | totlen += isopkt[u].length; | |
1192 | } | |
5971897f MR |
1193 | /* 3072 * 64 microframes */ |
1194 | if (totlen > 196608) { | |
1da177e4 LT |
1195 | kfree(isopkt); |
1196 | return -EINVAL; | |
1197 | } | |
1198 | uurb->buffer_length = totlen; | |
1199 | break; | |
1200 | ||
1da177e4 LT |
1201 | default: |
1202 | return -EINVAL; | |
1203 | } | |
9180135b AS |
1204 | if (uurb->buffer_length > 0 && |
1205 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1206 | uurb->buffer, uurb->buffer_length)) { | |
6fd19f4b JJ |
1207 | kfree(isopkt); |
1208 | kfree(dr); | |
9180135b | 1209 | return -EFAULT; |
1da177e4 | 1210 | } |
9180135b AS |
1211 | as = alloc_async(uurb->number_of_packets); |
1212 | if (!as) { | |
6fd19f4b JJ |
1213 | kfree(isopkt); |
1214 | kfree(dr); | |
1da177e4 LT |
1215 | return -ENOMEM; |
1216 | } | |
9180135b AS |
1217 | if (uurb->buffer_length > 0) { |
1218 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1219 | GFP_KERNEL); | |
1220 | if (!as->urb->transfer_buffer) { | |
1221 | kfree(isopkt); | |
1222 | kfree(dr); | |
1223 | free_async(as); | |
1224 | return -ENOMEM; | |
1225 | } | |
7152b592 AS |
1226 | /* Isochronous input data may end up being discontiguous |
1227 | * if some of the packets are short. Clear the buffer so | |
1228 | * that the gaps don't leak kernel data to userspace. | |
1229 | */ | |
1230 | if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1231 | memset(as->urb->transfer_buffer, 0, | |
1232 | uurb->buffer_length); | |
9180135b | 1233 | } |
04e482ff GKH |
1234 | as->urb->dev = ps->dev; |
1235 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1236 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1237 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1238 | |
1239 | /* This tedious sequence is necessary because the URB_* flags | |
1240 | * are internal to the kernel and subject to change, whereas | |
1241 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1242 | */ | |
1243 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1244 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1245 | u |= URB_ISO_ASAP; | |
1246 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1247 | u |= URB_SHORT_NOT_OK; | |
1248 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1249 | u |= URB_NO_FSBR; | |
1250 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1251 | u |= URB_ZERO_PACKET; | |
1252 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1253 | u |= URB_NO_INTERRUPT; | |
1254 | as->urb->transfer_flags = u; | |
1255 | ||
1da177e4 | 1256 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1257 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1258 | as->urb->start_frame = uurb->start_frame; |
1259 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1260 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1261 | ps->dev->speed == USB_SPEED_HIGH) | |
1262 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1263 | else | |
1264 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1265 | as->urb->context = as; |
1266 | as->urb->complete = async_completed; | |
1da177e4 LT |
1267 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1268 | as->urb->iso_frame_desc[u].offset = totlen; | |
1269 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1270 | totlen += isopkt[u].length; | |
1271 | } | |
6fd19f4b | 1272 | kfree(isopkt); |
1da177e4 | 1273 | as->ps = ps; |
04e482ff | 1274 | as->userurb = arg; |
9180135b | 1275 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1276 | as->userbuffer = uurb->buffer; |
1277 | else | |
1278 | as->userbuffer = NULL; | |
1279 | as->signr = uurb->signr; | |
1280 | as->ifnum = ifnum; | |
2425c08b | 1281 | as->pid = get_pid(task_pid(current)); |
86a264ab DH |
1282 | as->uid = cred->uid; |
1283 | as->euid = cred->euid; | |
7a01955f | 1284 | security_task_getsecid(current, &as->secid); |
9180135b | 1285 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1286 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1287 | uurb->buffer_length)) { |
1da177e4 LT |
1288 | free_async(as); |
1289 | return -EFAULT; | |
1290 | } | |
1291 | } | |
4c6e8971 | 1292 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 CF |
1293 | as->urb->transfer_buffer_length, 0, SUBMIT, |
1294 | is_in ? NULL : as->urb->transfer_buffer, | |
1295 | uurb->buffer_length); | |
04e482ff | 1296 | async_newpending(as); |
01c6460f AS |
1297 | |
1298 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1299 | spin_lock_irq(&ps->lock); | |
1300 | ||
1301 | /* Not exactly the endpoint address; the direction bit is | |
1302 | * shifted to the 0x10 position so that the value will be | |
1303 | * between 0 and 31. | |
1304 | */ | |
1305 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1306 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1307 | >> 3); | |
1308 | ||
1309 | /* If this bulk URB is the start of a new transfer, re-enable | |
1310 | * the endpoint. Otherwise mark it as a continuation URB. | |
1311 | */ | |
1312 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1313 | as->bulk_status = AS_CONTINUATION; | |
1314 | else | |
1315 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1316 | ||
1317 | /* Don't accept continuation URBs if the endpoint is | |
1318 | * disabled because of an earlier error. | |
1319 | */ | |
1320 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1321 | ret = -EREMOTEIO; | |
1322 | else | |
1323 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1324 | spin_unlock_irq(&ps->lock); | |
1325 | } else { | |
1326 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1327 | } | |
1328 | ||
1329 | if (ret) { | |
04e482ff GKH |
1330 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1331 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1332 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1333 | 0, ret, COMPLETE, NULL, 0); |
04e482ff GKH |
1334 | async_removepending(as); |
1335 | free_async(as); | |
1336 | return ret; | |
1337 | } | |
1338 | return 0; | |
1da177e4 LT |
1339 | } |
1340 | ||
1341 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1342 | { | |
1343 | struct usbdevfs_urb uurb; | |
1344 | ||
1345 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1346 | return -EFAULT; | |
1347 | ||
04e482ff GKH |
1348 | return proc_do_submiturb(ps, &uurb, |
1349 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1350 | arg); | |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1354 | { | |
1355 | struct async *as; | |
1356 | ||
1357 | as = async_getpending(ps, arg); | |
1358 | if (!as) | |
1359 | return -EINVAL; | |
1360 | usb_kill_urb(as->urb); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | static int processcompl(struct async *as, void __user * __user *arg) | |
1365 | { | |
1366 | struct urb *urb = as->urb; | |
1367 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1368 | void __user *addr = as->userurb; | |
1369 | unsigned int i; | |
1370 | ||
7152b592 AS |
1371 | if (as->userbuffer && urb->actual_length) { |
1372 | if (urb->number_of_packets > 0) /* Isochronous */ | |
1373 | i = urb->transfer_buffer_length; | |
1374 | else /* Non-Isoc */ | |
1375 | i = urb->actual_length; | |
1376 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, i)) | |
d794a021 | 1377 | goto err_out; |
7152b592 | 1378 | } |
e015268d | 1379 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1380 | goto err_out; |
1da177e4 | 1381 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1382 | goto err_out; |
1da177e4 | 1383 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1384 | goto err_out; |
1da177e4 | 1385 | |
93cf9b90 | 1386 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1387 | for (i = 0; i < urb->number_of_packets; i++) { |
1388 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1389 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1390 | goto err_out; |
668a9541 CL |
1391 | if (put_user(urb->iso_frame_desc[i].status, |
1392 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1393 | goto err_out; |
668a9541 | 1394 | } |
1da177e4 LT |
1395 | } |
1396 | ||
1da177e4 LT |
1397 | if (put_user(addr, (void __user * __user *)arg)) |
1398 | return -EFAULT; | |
1399 | return 0; | |
d794a021 ON |
1400 | |
1401 | err_out: | |
d794a021 | 1402 | return -EFAULT; |
1da177e4 LT |
1403 | } |
1404 | ||
04e482ff | 1405 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1406 | { |
04e482ff | 1407 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1408 | struct async *as = NULL; |
1409 | struct usb_device *dev = ps->dev; | |
1410 | ||
1411 | add_wait_queue(&ps->wait, &wait); | |
1412 | for (;;) { | |
1413 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1414 | as = async_getcompleted(ps); |
1415 | if (as) | |
1da177e4 LT |
1416 | break; |
1417 | if (signal_pending(current)) | |
1418 | break; | |
1419 | usb_unlock_device(dev); | |
1420 | schedule(); | |
1421 | usb_lock_device(dev); | |
1422 | } | |
1423 | remove_wait_queue(&ps->wait, &wait); | |
1424 | set_current_state(TASK_RUNNING); | |
1425 | return as; | |
1426 | } | |
1427 | ||
1428 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1429 | { | |
1430 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1431 | if (as) { |
1432 | int retval = processcompl(as, (void __user * __user *)arg); | |
1433 | free_async(as); | |
1434 | return retval; | |
1435 | } | |
1da177e4 LT |
1436 | if (signal_pending(current)) |
1437 | return -EINTR; | |
1438 | return -EIO; | |
1439 | } | |
1440 | ||
1441 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1442 | { | |
ddeee0b2 | 1443 | int retval; |
1da177e4 LT |
1444 | struct async *as; |
1445 | ||
ddeee0b2 LT |
1446 | as = async_getcompleted(ps); |
1447 | retval = -EAGAIN; | |
1448 | if (as) { | |
1449 | retval = processcompl(as, (void __user * __user *)arg); | |
1450 | free_async(as); | |
1451 | } | |
1452 | return retval; | |
1da177e4 LT |
1453 | } |
1454 | ||
1455 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1456 | static int proc_control_compat(struct dev_state *ps, |
1457 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1458 | { | |
1459 | struct usbdevfs_ctrltransfer __user *p; | |
1460 | __u32 udata; | |
1461 | p = compat_alloc_user_space(sizeof(*p)); | |
1462 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1463 | get_user(udata, &p32->data) || | |
1464 | put_user(compat_ptr(udata), &p->data)) | |
1465 | return -EFAULT; | |
1466 | return proc_control(ps, p); | |
1467 | } | |
1468 | ||
1469 | static int proc_bulk_compat(struct dev_state *ps, | |
1470 | struct usbdevfs_bulktransfer32 __user *p32) | |
1471 | { | |
1472 | struct usbdevfs_bulktransfer __user *p; | |
1473 | compat_uint_t n; | |
1474 | compat_caddr_t addr; | |
1475 | ||
1476 | p = compat_alloc_user_space(sizeof(*p)); | |
1477 | ||
1478 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1479 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1480 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1481 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1482 | return -EFAULT; | |
1483 | ||
1484 | return proc_bulk(ps, p); | |
1485 | } | |
1486 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1487 | { | |
1488 | struct usbdevfs_disconnectsignal32 ds; | |
1489 | ||
1490 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1491 | return -EFAULT; | |
1492 | ps->discsignr = ds.signr; | |
1493 | ps->disccontext = compat_ptr(ds.context); | |
1494 | return 0; | |
1495 | } | |
1da177e4 LT |
1496 | |
1497 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1498 | struct usbdevfs_urb32 __user *uurb) | |
1499 | { | |
1500 | __u32 uptr; | |
18753ebc MB |
1501 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1502 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1503 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1504 | __get_user(kurb->status, &uurb->status) || | |
1505 | __get_user(kurb->flags, &uurb->flags) || | |
1506 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1507 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1508 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1509 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1510 | __get_user(kurb->error_count, &uurb->error_count) || | |
1511 | __get_user(kurb->signr, &uurb->signr)) | |
1512 | return -EFAULT; | |
1513 | ||
1514 | if (__get_user(uptr, &uurb->buffer)) | |
1515 | return -EFAULT; | |
1516 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1517 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1518 | return -EFAULT; |
1519 | kurb->usercontext = compat_ptr(uptr); | |
1520 | ||
1521 | return 0; | |
1522 | } | |
1523 | ||
1524 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1525 | { | |
1526 | struct usbdevfs_urb uurb; | |
1527 | ||
04e482ff | 1528 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1529 | return -EFAULT; |
1530 | ||
04e482ff GKH |
1531 | return proc_do_submiturb(ps, &uurb, |
1532 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1533 | arg); | |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1537 | { | |
1538 | struct urb *urb = as->urb; | |
1539 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1540 | void __user *addr = as->userurb; | |
1541 | unsigned int i; | |
1542 | ||
d4a4683c | 1543 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1544 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1545 | urb->actual_length)) |
1da177e4 | 1546 | return -EFAULT; |
e015268d | 1547 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1548 | return -EFAULT; |
1549 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1550 | return -EFAULT; | |
1551 | if (put_user(urb->error_count, &userurb->error_count)) | |
1552 | return -EFAULT; | |
1553 | ||
93cf9b90 | 1554 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1555 | for (i = 0; i < urb->number_of_packets; i++) { |
1556 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1557 | &userurb->iso_frame_desc[i].actual_length)) | |
1558 | return -EFAULT; | |
1559 | if (put_user(urb->iso_frame_desc[i].status, | |
1560 | &userurb->iso_frame_desc[i].status)) | |
1561 | return -EFAULT; | |
1562 | } | |
1da177e4 LT |
1563 | } |
1564 | ||
c714de5d | 1565 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1566 | return -EFAULT; |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1571 | { | |
1572 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1573 | if (as) { |
1574 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1575 | free_async(as); | |
1576 | return retval; | |
1577 | } | |
1da177e4 LT |
1578 | if (signal_pending(current)) |
1579 | return -EINTR; | |
1580 | return -EIO; | |
1581 | } | |
1582 | ||
1583 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1584 | { | |
ddeee0b2 | 1585 | int retval; |
1da177e4 LT |
1586 | struct async *as; |
1587 | ||
ddeee0b2 LT |
1588 | retval = -EAGAIN; |
1589 | as = async_getcompleted(ps); | |
1590 | if (as) { | |
1591 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1592 | free_async(as); | |
1593 | } | |
1594 | return retval; | |
1da177e4 LT |
1595 | } |
1596 | ||
637e8a60 | 1597 | |
1da177e4 LT |
1598 | #endif |
1599 | ||
1600 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1601 | { | |
1602 | struct usbdevfs_disconnectsignal ds; | |
1603 | ||
1604 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1605 | return -EFAULT; | |
1da177e4 LT |
1606 | ps->discsignr = ds.signr; |
1607 | ps->disccontext = ds.context; | |
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1612 | { | |
1613 | unsigned int ifnum; | |
1614 | ||
1615 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1616 | return -EFAULT; | |
1617 | return claimintf(ps, ifnum); | |
1618 | } | |
1619 | ||
1620 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1621 | { | |
1622 | unsigned int ifnum; | |
1623 | int ret; | |
1624 | ||
1625 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1626 | return -EFAULT; | |
1627 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1628 | return ret; | |
1629 | destroy_async_on_interface (ps, ifnum); | |
1630 | return 0; | |
1631 | } | |
1632 | ||
c36fc889 | 1633 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1634 | { |
1da177e4 LT |
1635 | int size; |
1636 | void *buf = NULL; | |
1637 | int retval = 0; | |
1638 | struct usb_interface *intf = NULL; | |
1639 | struct usb_driver *driver = NULL; | |
1da177e4 | 1640 | |
c36fc889 | 1641 | /* alloc buffer */ |
04e482ff GKH |
1642 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1643 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1644 | return -ENOMEM; |
c36fc889 | 1645 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1646 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1647 | kfree(buf); |
1da177e4 LT |
1648 | return -EFAULT; |
1649 | } | |
1650 | } else { | |
04e482ff | 1651 | memset(buf, 0, size); |
1da177e4 LT |
1652 | } |
1653 | } | |
1654 | ||
349710c3 | 1655 | if (!connected(ps)) { |
6fd19f4b | 1656 | kfree(buf); |
1da177e4 LT |
1657 | return -ENODEV; |
1658 | } | |
1659 | ||
1660 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1661 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1662 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1663 | retval = -EINVAL; | |
c36fc889 | 1664 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1665 | |
1666 | /* disconnect kernel driver from interface */ | |
1667 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1668 | if (intf->dev.driver) { |
1669 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1670 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1671 | usb_driver_release_interface(driver, intf); |
1672 | } else | |
1673 | retval = -ENODATA; | |
1da177e4 LT |
1674 | break; |
1675 | ||
1676 | /* let kernel drivers try to (re)bind to the interface */ | |
1677 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1678 | if (!intf->dev.driver) |
1679 | retval = device_attach(&intf->dev); | |
1680 | else | |
1681 | retval = -EBUSY; | |
1da177e4 LT |
1682 | break; |
1683 | ||
1684 | /* talk directly to the interface's driver */ | |
1685 | default: | |
1da177e4 LT |
1686 | if (intf->dev.driver) |
1687 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 1688 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
1689 | retval = -ENOTTY; |
1690 | } else { | |
c532b29a | 1691 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1692 | if (retval == -ENOIOCTLCMD) |
1693 | retval = -ENOTTY; | |
1694 | } | |
1da177e4 LT |
1695 | } |
1696 | ||
1697 | /* cleanup and return */ | |
1698 | if (retval >= 0 | |
04e482ff | 1699 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1700 | && size > 0 |
04e482ff | 1701 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1702 | retval = -EFAULT; |
6fd19f4b JJ |
1703 | |
1704 | kfree(buf); | |
1da177e4 LT |
1705 | return retval; |
1706 | } | |
1707 | ||
c36fc889 PZ |
1708 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1709 | { | |
1710 | struct usbdevfs_ioctl ctrl; | |
1711 | ||
04e482ff | 1712 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1713 | return -EFAULT; |
1714 | return proc_ioctl(ps, &ctrl); | |
1715 | } | |
1716 | ||
1717 | #ifdef CONFIG_COMPAT | |
777da590 | 1718 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1719 | { |
1720 | struct usbdevfs_ioctl32 __user *uioc; | |
1721 | struct usbdevfs_ioctl ctrl; | |
1722 | u32 udata; | |
1723 | ||
058120d7 | 1724 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1725 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1726 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1727 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1728 | __get_user(udata, &uioc->data)) |
1729 | return -EFAULT; | |
1730 | ctrl.data = compat_ptr(udata); | |
1731 | ||
1732 | return proc_ioctl(ps, &ctrl); | |
1733 | } | |
1734 | #endif | |
1735 | ||
7cbe5dca AS |
1736 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1737 | { | |
1738 | unsigned portnum; | |
1739 | int rc; | |
1740 | ||
1741 | if (get_user(portnum, (unsigned __user *) arg)) | |
1742 | return -EFAULT; | |
1743 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1744 | if (rc == 0) | |
1745 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1746 | portnum, task_pid_nr(current), current->comm); | |
1747 | return rc; | |
1748 | } | |
1749 | ||
1750 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1751 | { | |
1752 | unsigned portnum; | |
1753 | ||
1754 | if (get_user(portnum, (unsigned __user *) arg)) | |
1755 | return -EFAULT; | |
1756 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1757 | } | |
1758 | ||
1da177e4 LT |
1759 | /* |
1760 | * NOTE: All requests here that have interface numbers as parameters | |
1761 | * are assuming that somehow the configuration has been prevented from | |
1762 | * changing. But there's no mechanism to ensure that... | |
1763 | */ | |
637e8a60 AB |
1764 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1765 | void __user *p) | |
1da177e4 | 1766 | { |
ec17cf1c | 1767 | struct dev_state *ps = file->private_data; |
637e8a60 | 1768 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 | 1769 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1770 | int ret = -ENOTTY; |
1771 | ||
1772 | if (!(file->f_mode & FMODE_WRITE)) | |
1773 | return -EPERM; | |
01412a21 | 1774 | |
1da177e4 | 1775 | usb_lock_device(dev); |
349710c3 | 1776 | if (!connected(ps)) { |
1da177e4 LT |
1777 | usb_unlock_device(dev); |
1778 | return -ENODEV; | |
1779 | } | |
1780 | ||
1781 | switch (cmd) { | |
1782 | case USBDEVFS_CONTROL: | |
441b62c1 | 1783 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1784 | ret = proc_control(ps, p); |
1785 | if (ret >= 0) | |
1786 | inode->i_mtime = CURRENT_TIME; | |
1787 | break; | |
1788 | ||
1789 | case USBDEVFS_BULK: | |
441b62c1 | 1790 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1791 | ret = proc_bulk(ps, p); |
1792 | if (ret >= 0) | |
1793 | inode->i_mtime = CURRENT_TIME; | |
1794 | break; | |
1795 | ||
1796 | case USBDEVFS_RESETEP: | |
441b62c1 | 1797 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1798 | ret = proc_resetep(ps, p); |
1799 | if (ret >= 0) | |
1800 | inode->i_mtime = CURRENT_TIME; | |
1801 | break; | |
1802 | ||
1803 | case USBDEVFS_RESET: | |
441b62c1 | 1804 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1805 | ret = proc_resetdevice(ps); |
1806 | break; | |
1807 | ||
1808 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1809 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1810 | ret = proc_clearhalt(ps, p); |
1811 | if (ret >= 0) | |
1812 | inode->i_mtime = CURRENT_TIME; | |
1813 | break; | |
1814 | ||
1815 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1816 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1817 | ret = proc_getdriver(ps, p); |
1818 | break; | |
1819 | ||
1820 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1821 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1822 | ret = proc_connectinfo(ps, p); |
1823 | break; | |
1824 | ||
1825 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1826 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1827 | ret = proc_setintf(ps, p); |
1828 | break; | |
1829 | ||
1830 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1831 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1832 | ret = proc_setconfig(ps, p); |
1833 | break; | |
1834 | ||
1835 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1836 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1837 | ret = proc_submiturb(ps, p); |
1838 | if (ret >= 0) | |
1839 | inode->i_mtime = CURRENT_TIME; | |
1840 | break; | |
1841 | ||
1842 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1843 | case USBDEVFS_CONTROL32: |
1844 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
1845 | ret = proc_control_compat(ps, p); | |
1846 | if (ret >= 0) | |
1847 | inode->i_mtime = CURRENT_TIME; | |
1848 | break; | |
1849 | ||
1850 | case USBDEVFS_BULK32: | |
1851 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
1852 | ret = proc_bulk_compat(ps, p); | |
1853 | if (ret >= 0) | |
1854 | inode->i_mtime = CURRENT_TIME; | |
1855 | break; | |
1856 | ||
1857 | case USBDEVFS_DISCSIGNAL32: | |
1858 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
1859 | ret = proc_disconnectsignal_compat(ps, p); | |
1860 | break; | |
1da177e4 LT |
1861 | |
1862 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1863 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1864 | ret = proc_submiturb_compat(ps, p); |
1865 | if (ret >= 0) | |
1866 | inode->i_mtime = CURRENT_TIME; | |
1867 | break; | |
1868 | ||
1869 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1870 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1871 | ret = proc_reapurb_compat(ps, p); |
1872 | break; | |
1873 | ||
1874 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 1875 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
1876 | ret = proc_reapurbnonblock_compat(ps, p); |
1877 | break; | |
1878 | ||
c36fc889 | 1879 | case USBDEVFS_IOCTL32: |
637e8a60 | 1880 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 1881 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1882 | break; |
1da177e4 LT |
1883 | #endif |
1884 | ||
1885 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1886 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1887 | ret = proc_unlinkurb(ps, p); |
1888 | break; | |
1889 | ||
1890 | case USBDEVFS_REAPURB: | |
441b62c1 | 1891 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1892 | ret = proc_reapurb(ps, p); |
1893 | break; | |
1894 | ||
1895 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 1896 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
1897 | ret = proc_reapurbnonblock(ps, p); |
1898 | break; | |
1899 | ||
1900 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1901 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1902 | ret = proc_disconnectsignal(ps, p); |
1903 | break; | |
1904 | ||
1905 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1906 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1907 | ret = proc_claiminterface(ps, p); |
1908 | break; | |
1909 | ||
1910 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1911 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1912 | ret = proc_releaseinterface(ps, p); |
1913 | break; | |
1914 | ||
1915 | case USBDEVFS_IOCTL: | |
441b62c1 | 1916 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1917 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1918 | break; |
7cbe5dca AS |
1919 | |
1920 | case USBDEVFS_CLAIM_PORT: | |
1921 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1922 | ret = proc_claim_port(ps, p); | |
1923 | break; | |
1924 | ||
1925 | case USBDEVFS_RELEASE_PORT: | |
1926 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1927 | ret = proc_release_port(ps, p); | |
1928 | break; | |
1da177e4 LT |
1929 | } |
1930 | usb_unlock_device(dev); | |
1931 | if (ret >= 0) | |
1932 | inode->i_atime = CURRENT_TIME; | |
1933 | return ret; | |
1934 | } | |
1935 | ||
637e8a60 AB |
1936 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
1937 | unsigned long arg) | |
1938 | { | |
1939 | int ret; | |
1940 | ||
637e8a60 | 1941 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
1942 | |
1943 | return ret; | |
1944 | } | |
1945 | ||
1946 | #ifdef CONFIG_COMPAT | |
1947 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
1948 | unsigned long arg) | |
1949 | { | |
1950 | int ret; | |
1951 | ||
637e8a60 | 1952 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
1953 | |
1954 | return ret; | |
1955 | } | |
1956 | #endif | |
1957 | ||
1da177e4 | 1958 | /* No kernel lock - fine */ |
04e482ff GKH |
1959 | static unsigned int usbdev_poll(struct file *file, |
1960 | struct poll_table_struct *wait) | |
1da177e4 | 1961 | { |
ec17cf1c TK |
1962 | struct dev_state *ps = file->private_data; |
1963 | unsigned int mask = 0; | |
1da177e4 LT |
1964 | |
1965 | poll_wait(file, &ps->wait, wait); | |
1966 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1967 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1968 | if (!connected(ps)) |
1da177e4 LT |
1969 | mask |= POLLERR | POLLHUP; |
1970 | return mask; | |
1971 | } | |
1972 | ||
9f8b17e6 | 1973 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
1974 | .owner = THIS_MODULE, |
1975 | .llseek = usbdev_lseek, | |
1976 | .read = usbdev_read, | |
1977 | .poll = usbdev_poll, | |
1978 | .unlocked_ioctl = usbdev_ioctl, | |
1979 | #ifdef CONFIG_COMPAT | |
1980 | .compat_ioctl = usbdev_compat_ioctl, | |
1981 | #endif | |
1982 | .open = usbdev_open, | |
1983 | .release = usbdev_release, | |
1da177e4 | 1984 | }; |
fbf82fd2 | 1985 | |
501950d8 | 1986 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
1987 | { |
1988 | struct dev_state *ps; | |
1989 | struct siginfo sinfo; | |
1990 | ||
1991 | while (!list_empty(&udev->filelist)) { | |
1992 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
1993 | destroy_all_async(ps); | |
1994 | wake_up_all(&ps->wait); | |
1995 | list_del_init(&ps->list); | |
1996 | if (ps->discsignr) { | |
1997 | sinfo.si_signo = ps->discsignr; | |
1998 | sinfo.si_errno = EPIPE; | |
1999 | sinfo.si_code = SI_ASYNCIO; | |
2000 | sinfo.si_addr = ps->disccontext; | |
2001 | kill_pid_info_as_uid(ps->discsignr, &sinfo, | |
2002 | ps->disc_pid, ps->disc_uid, | |
2003 | ps->disc_euid, ps->secid); | |
2004 | } | |
2005 | } | |
2006 | } | |
2007 | ||
9f8b17e6 KS |
2008 | #ifdef CONFIG_USB_DEVICE_CLASS |
2009 | static struct class *usb_classdev_class; | |
2010 | ||
2011 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 2012 | { |
e04199b2 AS |
2013 | struct device *cldev; |
2014 | ||
b0b090e5 GKH |
2015 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
2016 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
2017 | dev->devnum); | |
e04199b2 AS |
2018 | if (IS_ERR(cldev)) |
2019 | return PTR_ERR(cldev); | |
2020 | dev->usb_classdev = cldev; | |
27d39e26 | 2021 | return 0; |
fbf82fd2 KS |
2022 | } |
2023 | ||
9f8b17e6 | 2024 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 2025 | { |
e04199b2 AS |
2026 | if (dev->usb_classdev) |
2027 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
2028 | } |
2029 | ||
501950d8 AS |
2030 | #else |
2031 | #define usb_classdev_add(dev) 0 | |
2032 | #define usb_classdev_remove(dev) do {} while (0) | |
2033 | ||
2034 | #endif | |
2035 | ||
2036 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 2037 | unsigned long action, void *dev) |
a7b986b3 GKH |
2038 | { |
2039 | switch (action) { | |
2040 | case USB_DEVICE_ADD: | |
9f8b17e6 | 2041 | if (usb_classdev_add(dev)) |
27d39e26 | 2042 | return NOTIFY_BAD; |
a7b986b3 GKH |
2043 | break; |
2044 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 2045 | usb_classdev_remove(dev); |
501950d8 | 2046 | usbdev_remove(dev); |
a7b986b3 GKH |
2047 | break; |
2048 | } | |
2049 | return NOTIFY_OK; | |
2050 | } | |
2051 | ||
2052 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2053 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2054 | }; |
2055 | ||
7e7654a9 | 2056 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2057 | |
9f8b17e6 | 2058 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2059 | { |
2060 | int retval; | |
2061 | ||
fad21bdf | 2062 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2063 | "usb_device"); |
fbf82fd2 | 2064 | if (retval) { |
69a85942 | 2065 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2066 | goto out; |
2067 | } | |
9f8b17e6 | 2068 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2069 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2070 | if (retval) { |
69a85942 GKH |
2071 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2072 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2073 | goto error_cdev; |
fbf82fd2 | 2074 | } |
9f8b17e6 KS |
2075 | #ifdef CONFIG_USB_DEVICE_CLASS |
2076 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
2077 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 2078 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
2079 | retval = PTR_ERR(usb_classdev_class); |
2080 | cdev_del(&usb_device_cdev); | |
2081 | usb_classdev_class = NULL; | |
2082 | goto out; | |
fbf82fd2 | 2083 | } |
e105b8bf DW |
2084 | /* devices of this class shadow the major:minor of their parent |
2085 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
2086 | * to /sys/dev | |
2087 | */ | |
2088 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 2089 | #endif |
501950d8 | 2090 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2091 | out: |
2092 | return retval; | |
a7b986b3 | 2093 | |
a7b986b3 GKH |
2094 | error_cdev: |
2095 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2096 | goto out; | |
fbf82fd2 KS |
2097 | } |
2098 | ||
9f8b17e6 | 2099 | void usb_devio_cleanup(void) |
fbf82fd2 | 2100 | { |
a7b986b3 | 2101 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 2102 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
2103 | class_destroy(usb_classdev_class); |
2104 | #endif | |
fbf82fd2 | 2105 | cdev_del(&usb_device_cdev); |
fad21bdf | 2106 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2107 | } |