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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> | |
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> |
d178bc3a | 49 | #include <linux/user_namespace.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; | |
d178bc3a | 72 | const struct cred *cred; |
cd9f0375 AS |
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; |
d178bc3a | 83 | const struct cred *cred; |
1da177e4 LT |
84 | unsigned int signr; |
85 | unsigned int ifnum; | |
86 | void __user *userbuffer; | |
87 | void __user *userurb; | |
88 | struct urb *urb; | |
add1aaea | 89 | unsigned int mem_usage; |
e015268d | 90 | int status; |
7a01955f | 91 | u32 secid; |
01c6460f AS |
92 | u8 bulk_addr; |
93 | u8 bulk_status; | |
1da177e4 LT |
94 | }; |
95 | ||
04e482ff GKH |
96 | static int usbfs_snoop; |
97 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
98 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
99 | |
100 | #define snoop(dev, format, arg...) \ | |
101 | do { \ | |
102 | if (usbfs_snoop) \ | |
04e482ff | 103 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
104 | } while (0) |
105 | ||
4c6e8971 AS |
106 | enum snoop_when { |
107 | SUBMIT, COMPLETE | |
108 | }; | |
fad21bdf | 109 | |
4c6e8971 | 110 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 111 | |
add1aaea AS |
112 | /* Limit on the total amount of memory we can allocate for transfers */ |
113 | #define MAX_USBFS_MEMORY_USAGE 16777216 /* 16 MB */ | |
1da177e4 | 114 | |
add1aaea AS |
115 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
116 | ||
117 | /* Check whether it's okay to allocate more memory for a transfer */ | |
118 | static int usbfs_increase_memory_usage(unsigned amount) | |
119 | { | |
120 | atomic_add(amount, &usbfs_memory_usage); | |
121 | if (atomic_read(&usbfs_memory_usage) <= MAX_USBFS_MEMORY_USAGE) | |
122 | return 0; | |
123 | atomic_sub(amount, &usbfs_memory_usage); | |
124 | return -ENOMEM; | |
125 | } | |
126 | ||
127 | /* Memory for a transfer is being deallocated */ | |
128 | static void usbfs_decrease_memory_usage(unsigned amount) | |
129 | { | |
130 | atomic_sub(amount, &usbfs_memory_usage); | |
131 | } | |
4c6e8971 | 132 | |
d34d9721 | 133 | static int connected(struct dev_state *ps) |
1da177e4 | 134 | { |
349710c3 AS |
135 | return (!list_empty(&ps->list) && |
136 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
137 | } |
138 | ||
139 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
140 | { | |
141 | loff_t ret; | |
142 | ||
f9de332e | 143 | mutex_lock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
144 | |
145 | switch (orig) { | |
146 | case 0: | |
147 | file->f_pos = offset; | |
148 | ret = file->f_pos; | |
149 | break; | |
150 | case 1: | |
151 | file->f_pos += offset; | |
152 | ret = file->f_pos; | |
153 | break; | |
154 | case 2: | |
155 | default: | |
156 | ret = -EINVAL; | |
157 | } | |
158 | ||
f9de332e | 159 | mutex_unlock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
160 | return ret; |
161 | } | |
162 | ||
04e482ff GKH |
163 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
164 | loff_t *ppos) | |
1da177e4 | 165 | { |
ec17cf1c | 166 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
167 | struct usb_device *dev = ps->dev; |
168 | ssize_t ret = 0; | |
169 | unsigned len; | |
170 | loff_t pos; | |
171 | int i; | |
172 | ||
173 | pos = *ppos; | |
174 | usb_lock_device(dev); | |
349710c3 | 175 | if (!connected(ps)) { |
1da177e4 LT |
176 | ret = -ENODEV; |
177 | goto err; | |
178 | } else if (pos < 0) { | |
179 | ret = -EINVAL; | |
180 | goto err; | |
181 | } | |
182 | ||
183 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
184 | /* 18 bytes - fits on the stack */ |
185 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
186 | |
187 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
188 | le16_to_cpus(&temp_desc.bcdUSB); |
189 | le16_to_cpus(&temp_desc.idVendor); | |
190 | le16_to_cpus(&temp_desc.idProduct); | |
191 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
192 | |
193 | len = sizeof(struct usb_device_descriptor) - pos; | |
194 | if (len > nbytes) | |
195 | len = nbytes; | |
8781ba0a | 196 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
197 | ret = -EFAULT; |
198 | goto err; | |
199 | } | |
1da177e4 LT |
200 | |
201 | *ppos += len; | |
202 | buf += len; | |
203 | nbytes -= len; | |
204 | ret += len; | |
205 | } | |
206 | ||
207 | pos = sizeof(struct usb_device_descriptor); | |
208 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
209 | struct usb_config_descriptor *config = | |
210 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
211 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
212 | ||
213 | if (*ppos < pos + length) { | |
214 | ||
215 | /* The descriptor may claim to be longer than it | |
216 | * really is. Here is the actual allocated length. */ | |
217 | unsigned alloclen = | |
218 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
219 | ||
220 | len = length - (*ppos - pos); | |
221 | if (len > nbytes) | |
222 | len = nbytes; | |
223 | ||
224 | /* Simply don't write (skip over) unallocated parts */ | |
225 | if (alloclen > (*ppos - pos)) { | |
226 | alloclen -= (*ppos - pos); | |
227 | if (copy_to_user(buf, | |
228 | dev->rawdescriptors[i] + (*ppos - pos), | |
229 | min(len, alloclen))) { | |
230 | ret = -EFAULT; | |
231 | goto err; | |
232 | } | |
233 | } | |
234 | ||
235 | *ppos += len; | |
236 | buf += len; | |
237 | nbytes -= len; | |
238 | ret += len; | |
239 | } | |
240 | ||
241 | pos += length; | |
242 | } | |
243 | ||
244 | err: | |
245 | usb_unlock_device(dev); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | /* | |
250 | * async list handling | |
251 | */ | |
252 | ||
253 | static struct async *alloc_async(unsigned int numisoframes) | |
254 | { | |
dd95b814 | 255 | struct async *as; |
0a1ef3b5 | 256 | |
dd95b814 | 257 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
258 | if (!as) |
259 | return NULL; | |
1da177e4 LT |
260 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
261 | if (!as->urb) { | |
262 | kfree(as); | |
263 | return NULL; | |
264 | } | |
04e482ff | 265 | return as; |
1da177e4 LT |
266 | } |
267 | ||
268 | static void free_async(struct async *as) | |
269 | { | |
2425c08b | 270 | put_pid(as->pid); |
d178bc3a | 271 | put_cred(as->cred); |
6fd19f4b JJ |
272 | kfree(as->urb->transfer_buffer); |
273 | kfree(as->urb->setup_packet); | |
1da177e4 | 274 | usb_free_urb(as->urb); |
add1aaea | 275 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 276 | kfree(as); |
1da177e4 LT |
277 | } |
278 | ||
d34d9721 | 279 | static void async_newpending(struct async *as) |
1da177e4 | 280 | { |
04e482ff GKH |
281 | struct dev_state *ps = as->ps; |
282 | unsigned long flags; | |
283 | ||
284 | spin_lock_irqsave(&ps->lock, flags); | |
285 | list_add_tail(&as->asynclist, &ps->async_pending); | |
286 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
287 | } |
288 | ||
d34d9721 | 289 | static void async_removepending(struct async *as) |
1da177e4 | 290 | { |
04e482ff GKH |
291 | struct dev_state *ps = as->ps; |
292 | unsigned long flags; | |
293 | ||
294 | spin_lock_irqsave(&ps->lock, flags); | |
295 | list_del_init(&as->asynclist); | |
296 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
297 | } |
298 | ||
d34d9721 | 299 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 300 | { |
04e482ff GKH |
301 | unsigned long flags; |
302 | struct async *as = NULL; | |
303 | ||
304 | spin_lock_irqsave(&ps->lock, flags); | |
305 | if (!list_empty(&ps->async_completed)) { | |
306 | as = list_entry(ps->async_completed.next, struct async, | |
307 | asynclist); | |
308 | list_del_init(&as->asynclist); | |
309 | } | |
310 | spin_unlock_irqrestore(&ps->lock, flags); | |
311 | return as; | |
1da177e4 LT |
312 | } |
313 | ||
d34d9721 | 314 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 315 | void __user *userurb) |
1da177e4 | 316 | { |
04e482ff GKH |
317 | unsigned long flags; |
318 | struct async *as; | |
1da177e4 | 319 | |
04e482ff | 320 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
321 | list_for_each_entry(as, &ps->async_pending, asynclist) |
322 | if (as->userurb == userurb) { | |
323 | list_del_init(&as->asynclist); | |
324 | spin_unlock_irqrestore(&ps->lock, flags); | |
325 | return as; | |
326 | } | |
04e482ff GKH |
327 | spin_unlock_irqrestore(&ps->lock, flags); |
328 | return NULL; | |
1da177e4 LT |
329 | } |
330 | ||
4c6e8971 AS |
331 | static void snoop_urb(struct usb_device *udev, |
332 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
333 | int timeout_or_status, enum snoop_when when, |
334 | unsigned char *data, unsigned data_len) | |
e639dd3f | 335 | { |
4c6e8971 AS |
336 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
337 | static const char *dirs[] = {"out", "in"}; | |
338 | int ep; | |
339 | const char *t, *d; | |
e639dd3f GKH |
340 | |
341 | if (!usbfs_snoop) | |
342 | return; | |
343 | ||
4c6e8971 AS |
344 | ep = usb_pipeendpoint(pipe); |
345 | t = types[usb_pipetype(pipe)]; | |
346 | d = dirs[!!usb_pipein(pipe)]; | |
347 | ||
348 | if (userurb) { /* Async */ | |
349 | if (when == SUBMIT) | |
350 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
351 | "length %u\n", | |
352 | userurb, ep, t, d, length); | |
353 | else | |
354 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
355 | "actual_length %u status %d\n", | |
356 | userurb, ep, t, d, length, | |
357 | timeout_or_status); | |
358 | } else { | |
359 | if (when == SUBMIT) | |
360 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
361 | "timeout %d\n", | |
362 | ep, t, d, length, timeout_or_status); | |
363 | else | |
364 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
365 | "status %d\n", | |
366 | ep, t, d, length, timeout_or_status); | |
367 | } | |
0880aef4 CF |
368 | |
369 | if (data && data_len > 0) { | |
370 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
371 | data, data_len, 1); | |
372 | } | |
e639dd3f GKH |
373 | } |
374 | ||
01c6460f AS |
375 | #define AS_CONTINUATION 1 |
376 | #define AS_UNLINK 2 | |
377 | ||
378 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
379 | __releases(ps->lock) | |
380 | __acquires(ps->lock) | |
381 | { | |
382 | struct async *as; | |
383 | ||
384 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
385 | * including the first one without AS_CONTINUATION. If such an | |
386 | * URB is encountered then a new transfer has already started so | |
387 | * the endpoint doesn't need to be disabled; otherwise it does. | |
388 | */ | |
389 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
390 | if (as->bulk_addr == bulk_addr) { | |
391 | if (as->bulk_status != AS_CONTINUATION) | |
392 | goto rescan; | |
393 | as->bulk_status = AS_UNLINK; | |
394 | as->bulk_addr = 0; | |
395 | } | |
396 | } | |
397 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
398 | ||
399 | /* Now carefully unlink all the marked pending URBs */ | |
400 | rescan: | |
401 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
402 | if (as->bulk_status == AS_UNLINK) { | |
403 | as->bulk_status = 0; /* Only once */ | |
404 | spin_unlock(&ps->lock); /* Allow completions */ | |
405 | usb_unlink_urb(as->urb); | |
406 | spin_lock(&ps->lock); | |
407 | goto rescan; | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
7d12e780 | 412 | static void async_completed(struct urb *urb) |
1da177e4 | 413 | { |
04e482ff GKH |
414 | struct async *as = urb->context; |
415 | struct dev_state *ps = as->ps; | |
1da177e4 | 416 | struct siginfo sinfo; |
516a1a07 | 417 | struct pid *pid = NULL; |
516a1a07 | 418 | u32 secid = 0; |
d178bc3a | 419 | const struct cred *cred = NULL; |
516a1a07 | 420 | int signr; |
1da177e4 | 421 | |
04e482ff GKH |
422 | spin_lock(&ps->lock); |
423 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 424 | as->status = urb->status; |
516a1a07 ON |
425 | signr = as->signr; |
426 | if (signr) { | |
1da177e4 | 427 | sinfo.si_signo = as->signr; |
e015268d | 428 | sinfo.si_errno = as->status; |
1da177e4 LT |
429 | sinfo.si_code = SI_ASYNCIO; |
430 | sinfo.si_addr = as->userurb; | |
aec01c58 | 431 | pid = get_pid(as->pid); |
d178bc3a | 432 | cred = get_cred(as->cred); |
516a1a07 | 433 | secid = as->secid; |
1da177e4 | 434 | } |
e639dd3f | 435 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 436 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
0880aef4 CF |
437 | as->status, COMPLETE, |
438 | ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ? | |
439 | NULL : urb->transfer_buffer, urb->actual_length); | |
01c6460f AS |
440 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
441 | as->status != -ENOENT) | |
442 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
443 | spin_unlock(&ps->lock); |
444 | ||
aec01c58 | 445 | if (signr) { |
d178bc3a | 446 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 447 | put_pid(pid); |
d178bc3a | 448 | put_cred(cred); |
aec01c58 | 449 | } |
516a1a07 | 450 | |
e639dd3f | 451 | wake_up(&ps->wait); |
1da177e4 LT |
452 | } |
453 | ||
04e482ff | 454 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
455 | { |
456 | struct async *as; | |
457 | unsigned long flags; | |
458 | ||
459 | spin_lock_irqsave(&ps->lock, flags); | |
460 | while (!list_empty(list)) { | |
461 | as = list_entry(list->next, struct async, asynclist); | |
462 | list_del_init(&as->asynclist); | |
463 | ||
464 | /* drop the spinlock so the completion handler can run */ | |
465 | spin_unlock_irqrestore(&ps->lock, flags); | |
466 | usb_kill_urb(as->urb); | |
467 | spin_lock_irqsave(&ps->lock, flags); | |
468 | } | |
469 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
470 | } |
471 | ||
04e482ff GKH |
472 | static void destroy_async_on_interface(struct dev_state *ps, |
473 | unsigned int ifnum) | |
1da177e4 LT |
474 | { |
475 | struct list_head *p, *q, hitlist; | |
476 | unsigned long flags; | |
477 | ||
478 | INIT_LIST_HEAD(&hitlist); | |
479 | spin_lock_irqsave(&ps->lock, flags); | |
480 | list_for_each_safe(p, q, &ps->async_pending) | |
481 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
482 | list_move_tail(p, &hitlist); | |
483 | spin_unlock_irqrestore(&ps->lock, flags); | |
484 | destroy_async(ps, &hitlist); | |
485 | } | |
486 | ||
d34d9721 | 487 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 488 | { |
04e482ff | 489 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
490 | } |
491 | ||
492 | /* | |
493 | * interface claims are made only at the request of user level code, | |
494 | * which can also release them (explicitly or by closing files). | |
495 | * they're also undone when devices disconnect. | |
496 | */ | |
497 | ||
04e482ff GKH |
498 | static int driver_probe(struct usb_interface *intf, |
499 | const struct usb_device_id *id) | |
1da177e4 LT |
500 | { |
501 | return -ENODEV; | |
502 | } | |
503 | ||
504 | static void driver_disconnect(struct usb_interface *intf) | |
505 | { | |
04e482ff | 506 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
507 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
508 | ||
509 | if (!ps) | |
510 | return; | |
511 | ||
512 | /* NOTE: this relies on usbcore having canceled and completed | |
513 | * all pending I/O requests; 2.6 does that. | |
514 | */ | |
515 | ||
516 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
517 | clear_bit(ifnum, &ps->ifclaimed); | |
518 | else | |
3b6004f3 GKH |
519 | dev_warn(&intf->dev, "interface number %u out of range\n", |
520 | ifnum); | |
1da177e4 | 521 | |
04e482ff | 522 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
523 | |
524 | /* force async requests to complete */ | |
525 | destroy_async_on_interface(ps, ifnum); | |
526 | } | |
527 | ||
2e2eb83f AS |
528 | /* The following routines are merely placeholders. There is no way |
529 | * to inform a user task about suspend or resumes. | |
530 | */ | |
531 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
532 | { | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int driver_resume(struct usb_interface *intf) | |
537 | { | |
538 | return 0; | |
539 | } | |
540 | ||
1da177e4 | 541 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
542 | .name = "usbfs", |
543 | .probe = driver_probe, | |
544 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
545 | .suspend = driver_suspend, |
546 | .resume = driver_resume, | |
1da177e4 LT |
547 | }; |
548 | ||
549 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
550 | { | |
551 | struct usb_device *dev = ps->dev; | |
552 | struct usb_interface *intf; | |
553 | int err; | |
554 | ||
555 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
556 | return -EINVAL; | |
557 | /* already claimed */ | |
558 | if (test_bit(ifnum, &ps->ifclaimed)) | |
559 | return 0; | |
560 | ||
1da177e4 LT |
561 | intf = usb_ifnum_to_if(dev, ifnum); |
562 | if (!intf) | |
563 | err = -ENOENT; | |
564 | else | |
565 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
566 | if (err == 0) |
567 | set_bit(ifnum, &ps->ifclaimed); | |
568 | return err; | |
569 | } | |
570 | ||
571 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
572 | { | |
573 | struct usb_device *dev; | |
574 | struct usb_interface *intf; | |
575 | int err; | |
576 | ||
577 | err = -EINVAL; | |
578 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
579 | return err; | |
580 | dev = ps->dev; | |
1da177e4 LT |
581 | intf = usb_ifnum_to_if(dev, ifnum); |
582 | if (!intf) | |
583 | err = -ENOENT; | |
584 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
585 | usb_driver_release_interface(&usbfs_driver, intf); | |
586 | err = 0; | |
587 | } | |
1da177e4 LT |
588 | return err; |
589 | } | |
590 | ||
591 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
592 | { | |
593 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
594 | return -EHOSTUNREACH; | |
595 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
596 | return -EINVAL; | |
597 | if (test_bit(ifnum, &ps->ifclaimed)) | |
598 | return 0; | |
599 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
600 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
601 | "interface %u before use\n", task_pid_nr(current), | |
602 | current->comm, ifnum); | |
1da177e4 LT |
603 | return claimintf(ps, ifnum); |
604 | } | |
605 | ||
606 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
607 | { | |
608 | unsigned int i, j, e; | |
04e482ff | 609 | struct usb_interface *intf; |
1da177e4 LT |
610 | struct usb_host_interface *alts; |
611 | struct usb_endpoint_descriptor *endpt; | |
612 | ||
613 | if (ep & ~(USB_DIR_IN|0xf)) | |
614 | return -EINVAL; | |
615 | if (!dev->actconfig) | |
616 | return -ESRCH; | |
617 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
618 | intf = dev->actconfig->interface[i]; | |
619 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 620 | alts = &intf->altsetting[j]; |
1da177e4 LT |
621 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
622 | endpt = &alts->endpoint[e].desc; | |
623 | if (endpt->bEndpointAddress == ep) | |
624 | return alts->desc.bInterfaceNumber; | |
625 | } | |
626 | } | |
627 | } | |
04e482ff | 628 | return -ENOENT; |
1da177e4 LT |
629 | } |
630 | ||
04e482ff | 631 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
393cbb51 | 632 | unsigned int request, unsigned int index) |
1da177e4 LT |
633 | { |
634 | int ret = 0; | |
393cbb51 | 635 | struct usb_host_interface *alt_setting; |
1da177e4 | 636 | |
6da9c990 DV |
637 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
638 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 639 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
640 | return -EHOSTUNREACH; |
641 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
642 | return 0; | |
643 | ||
393cbb51 MD |
644 | /* |
645 | * check for the special corner case 'get_device_id' in the printer | |
646 | * class specification, where wIndex is (interface << 8 | altsetting) | |
647 | * instead of just interface | |
648 | */ | |
649 | if (requesttype == 0xa1 && request == 0) { | |
650 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
651 | index >> 8, index & 0xff); | |
652 | if (alt_setting | |
653 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
654 | index >>= 8; | |
655 | } | |
656 | ||
1da177e4 LT |
657 | index &= 0xff; |
658 | switch (requesttype & USB_RECIP_MASK) { | |
659 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
660 | ret = findintfep(ps->dev, index); |
661 | if (ret >= 0) | |
1da177e4 LT |
662 | ret = checkintf(ps, ret); |
663 | break; | |
664 | ||
665 | case USB_RECIP_INTERFACE: | |
666 | ret = checkintf(ps, index); | |
667 | break; | |
668 | } | |
669 | return ret; | |
670 | } | |
671 | ||
61ad04a8 | 672 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 673 | { |
a80d5ff0 | 674 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 675 | } |
4592bf5a | 676 | |
61ad04a8 | 677 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
678 | { |
679 | struct device *dev; | |
680 | ||
a80d5ff0 DH |
681 | dev = bus_find_device(&usb_bus_type, NULL, |
682 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
683 | if (!dev) |
684 | return NULL; | |
9f8b17e6 KS |
685 | return container_of(dev, struct usb_device, dev); |
686 | } | |
4592bf5a | 687 | |
1da177e4 LT |
688 | /* |
689 | * file operations | |
690 | */ | |
691 | static int usbdev_open(struct inode *inode, struct file *file) | |
692 | { | |
fbf82fd2 | 693 | struct usb_device *dev = NULL; |
1da177e4 LT |
694 | struct dev_state *ps; |
695 | int ret; | |
696 | ||
1da177e4 | 697 | ret = -ENOMEM; |
04e482ff GKH |
698 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
699 | if (!ps) | |
62e299e6 | 700 | goto out_free_ps; |
1da177e4 | 701 | |
01105a24 | 702 | ret = -ENODEV; |
61ad04a8 | 703 | |
62e299e6 AS |
704 | /* Protect against simultaneous removal or release */ |
705 | mutex_lock(&usbfs_mutex); | |
706 | ||
9f8b17e6 | 707 | /* usbdev device-node */ |
fbf82fd2 | 708 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 709 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 710 | |
9f8b17e6 KS |
711 | #ifdef CONFIG_USB_DEVICEFS |
712 | /* procfs file */ | |
d64aac36 | 713 | if (!dev) { |
8e18e294 | 714 | dev = inode->i_private; |
d64aac36 AS |
715 | if (dev && dev->usbfs_dentry && |
716 | dev->usbfs_dentry->d_inode == inode) | |
717 | usb_get_dev(dev); | |
718 | else | |
719 | dev = NULL; | |
720 | } | |
9f8b17e6 | 721 | #endif |
62e299e6 AS |
722 | mutex_unlock(&usbfs_mutex); |
723 | ||
724 | if (!dev) | |
725 | goto out_free_ps; | |
726 | ||
727 | usb_lock_device(dev); | |
728 | if (dev->state == USB_STATE_NOTATTACHED) | |
729 | goto out_unlock_device; | |
730 | ||
94fcda1f | 731 | ret = usb_autoresume_device(dev); |
01d883d4 | 732 | if (ret) |
62e299e6 | 733 | goto out_unlock_device; |
01d883d4 | 734 | |
1da177e4 LT |
735 | ps->dev = dev; |
736 | ps->file = file; | |
737 | spin_lock_init(&ps->lock); | |
316547fd | 738 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
739 | INIT_LIST_HEAD(&ps->async_pending); |
740 | INIT_LIST_HEAD(&ps->async_completed); | |
741 | init_waitqueue_head(&ps->wait); | |
742 | ps->discsignr = 0; | |
2425c08b | 743 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 744 | ps->cred = get_current_cred(); |
1da177e4 LT |
745 | ps->disccontext = NULL; |
746 | ps->ifclaimed = 0; | |
7a01955f | 747 | security_task_getsecid(current, &ps->secid); |
527660a8 | 748 | smp_wmb(); |
1da177e4 LT |
749 | list_add_tail(&ps->list, &dev->filelist); |
750 | file->private_data = ps; | |
62e299e6 | 751 | usb_unlock_device(dev); |
2da41d5f AS |
752 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
753 | current->comm); | |
62e299e6 AS |
754 | return ret; |
755 | ||
756 | out_unlock_device: | |
757 | usb_unlock_device(dev); | |
758 | usb_put_dev(dev); | |
759 | out_free_ps: | |
760 | kfree(ps); | |
4a2a8a2c | 761 | return ret; |
1da177e4 LT |
762 | } |
763 | ||
764 | static int usbdev_release(struct inode *inode, struct file *file) | |
765 | { | |
ec17cf1c | 766 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
767 | struct usb_device *dev = ps->dev; |
768 | unsigned int ifnum; | |
6ff10464 | 769 | struct async *as; |
1da177e4 LT |
770 | |
771 | usb_lock_device(dev); | |
7cbe5dca | 772 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 773 | |
1da177e4 | 774 | list_del_init(&ps->list); |
4a2a8a2c | 775 | |
1da177e4 LT |
776 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
777 | ifnum++) { | |
778 | if (test_bit(ifnum, &ps->ifclaimed)) | |
779 | releaseintf(ps, ifnum); | |
780 | } | |
781 | destroy_all_async(ps); | |
94fcda1f | 782 | usb_autosuspend_device(dev); |
1da177e4 LT |
783 | usb_unlock_device(dev); |
784 | usb_put_dev(dev); | |
2425c08b | 785 | put_pid(ps->disc_pid); |
d178bc3a | 786 | put_cred(ps->cred); |
6ff10464 AS |
787 | |
788 | as = async_getcompleted(ps); | |
789 | while (as) { | |
790 | free_async(as); | |
791 | as = async_getcompleted(ps); | |
792 | } | |
1da177e4 | 793 | kfree(ps); |
4a2a8a2c | 794 | return 0; |
1da177e4 LT |
795 | } |
796 | ||
797 | static int proc_control(struct dev_state *ps, void __user *arg) | |
798 | { | |
799 | struct usb_device *dev = ps->dev; | |
800 | struct usbdevfs_ctrltransfer ctrl; | |
801 | unsigned int tmo; | |
802 | unsigned char *tbuf; | |
ff66e3ce | 803 | unsigned wLength; |
4c6e8971 | 804 | int i, pipe, ret; |
1da177e4 LT |
805 | |
806 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
807 | return -EFAULT; | |
393cbb51 MD |
808 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
809 | ctrl.wIndex); | |
04e482ff | 810 | if (ret) |
1da177e4 | 811 | return ret; |
ff66e3ce AM |
812 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
813 | if (wLength > PAGE_SIZE) | |
1da177e4 | 814 | return -EINVAL; |
add1aaea AS |
815 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
816 | sizeof(struct usb_ctrlrequest)); | |
817 | if (ret) | |
818 | return ret; | |
04e482ff | 819 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
820 | if (!tbuf) { |
821 | ret = -ENOMEM; | |
822 | goto done; | |
823 | } | |
1da177e4 | 824 | tmo = ctrl.timeout; |
0880aef4 CF |
825 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
826 | "bRequest=%02x wValue=%04x " | |
827 | "wIndex=%04x wLength=%04x\n", | |
828 | ctrl.bRequestType, ctrl.bRequest, | |
829 | __le16_to_cpup(&ctrl.wValue), | |
830 | __le16_to_cpup(&ctrl.wIndex), | |
831 | __le16_to_cpup(&ctrl.wLength)); | |
1da177e4 | 832 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
833 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
834 | ctrl.wLength)) { | |
52fb743d AS |
835 | ret = -EINVAL; |
836 | goto done; | |
1da177e4 | 837 | } |
4c6e8971 | 838 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 839 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
840 | |
841 | usb_unlock_device(dev); | |
4c6e8971 | 842 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
843 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
844 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 845 | usb_lock_device(dev); |
0880aef4 | 846 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 847 | tbuf, max(i, 0)); |
1da177e4 | 848 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 849 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
850 | ret = -EFAULT; |
851 | goto done; | |
1da177e4 LT |
852 | } |
853 | } | |
854 | } else { | |
855 | if (ctrl.wLength) { | |
856 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
857 | ret = -EFAULT; |
858 | goto done; | |
1da177e4 LT |
859 | } |
860 | } | |
4c6e8971 | 861 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
862 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
863 | tbuf, ctrl.wLength); | |
4c6e8971 | 864 | |
1da177e4 | 865 | usb_unlock_device(dev); |
04e482ff GKH |
866 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
867 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
868 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 869 | usb_lock_device(dev); |
0880aef4 | 870 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 871 | } |
04e482ff | 872 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
873 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
874 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
875 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
876 | ctrl.wLength, i); | |
877 | } | |
52fb743d AS |
878 | ret = i; |
879 | done: | |
880 | free_page((unsigned long) tbuf); | |
add1aaea AS |
881 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
882 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 883 | return ret; |
1da177e4 LT |
884 | } |
885 | ||
886 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
887 | { | |
888 | struct usb_device *dev = ps->dev; | |
889 | struct usbdevfs_bulktransfer bulk; | |
890 | unsigned int tmo, len1, pipe; | |
891 | int len2; | |
892 | unsigned char *tbuf; | |
4c6e8971 | 893 | int i, ret; |
1da177e4 LT |
894 | |
895 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
896 | return -EFAULT; | |
04e482ff GKH |
897 | ret = findintfep(ps->dev, bulk.ep); |
898 | if (ret < 0) | |
1da177e4 | 899 | return ret; |
04e482ff GKH |
900 | ret = checkintf(ps, ret); |
901 | if (ret) | |
1da177e4 LT |
902 | return ret; |
903 | if (bulk.ep & USB_DIR_IN) | |
904 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
905 | else | |
906 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
907 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
908 | return -EINVAL; | |
909 | len1 = bulk.len; | |
add1aaea | 910 | if (len1 > MAX_USBFS_MEMORY_USAGE) |
1da177e4 | 911 | return -EINVAL; |
add1aaea AS |
912 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
913 | if (ret) | |
914 | return ret; | |
915 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) { | |
916 | ret = -ENOMEM; | |
917 | goto done; | |
918 | } | |
1da177e4 LT |
919 | tmo = bulk.timeout; |
920 | if (bulk.ep & 0x80) { | |
921 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
922 | ret = -EINVAL; |
923 | goto done; | |
1da177e4 | 924 | } |
0880aef4 | 925 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 926 | |
1da177e4 LT |
927 | usb_unlock_device(dev); |
928 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
929 | usb_lock_device(dev); | |
0880aef4 | 930 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 931 | |
1da177e4 LT |
932 | if (!i && len2) { |
933 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
934 | ret = -EFAULT; |
935 | goto done; | |
1da177e4 LT |
936 | } |
937 | } | |
938 | } else { | |
939 | if (len1) { | |
940 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
941 | ret = -EFAULT; |
942 | goto done; | |
1da177e4 LT |
943 | } |
944 | } | |
0880aef4 | 945 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 946 | |
1da177e4 LT |
947 | usb_unlock_device(dev); |
948 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
949 | usb_lock_device(dev); | |
0880aef4 | 950 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 951 | } |
52fb743d AS |
952 | ret = (i < 0 ? i : len2); |
953 | done: | |
1da177e4 | 954 | kfree(tbuf); |
add1aaea | 955 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 956 | return ret; |
1da177e4 LT |
957 | } |
958 | ||
959 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
960 | { | |
961 | unsigned int ep; | |
962 | int ret; | |
963 | ||
964 | if (get_user(ep, (unsigned int __user *)arg)) | |
965 | return -EFAULT; | |
04e482ff GKH |
966 | ret = findintfep(ps->dev, ep); |
967 | if (ret < 0) | |
1da177e4 | 968 | return ret; |
04e482ff GKH |
969 | ret = checkintf(ps, ret); |
970 | if (ret) | |
1da177e4 | 971 | return ret; |
3444b26a | 972 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
973 | return 0; |
974 | } | |
975 | ||
976 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
977 | { | |
978 | unsigned int ep; | |
979 | int pipe; | |
980 | int ret; | |
981 | ||
982 | if (get_user(ep, (unsigned int __user *)arg)) | |
983 | return -EFAULT; | |
04e482ff GKH |
984 | ret = findintfep(ps->dev, ep); |
985 | if (ret < 0) | |
1da177e4 | 986 | return ret; |
04e482ff GKH |
987 | ret = checkintf(ps, ret); |
988 | if (ret) | |
1da177e4 LT |
989 | return ret; |
990 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
991 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
992 | else | |
993 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
994 | |
995 | return usb_clear_halt(ps->dev, pipe); | |
996 | } | |
1da177e4 LT |
997 | |
998 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
999 | { | |
1000 | struct usbdevfs_getdriver gd; | |
1001 | struct usb_interface *intf; | |
1002 | int ret; | |
1003 | ||
1004 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1005 | return -EFAULT; | |
1da177e4 LT |
1006 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1007 | if (!intf || !intf->dev.driver) | |
1008 | ret = -ENODATA; | |
1009 | else { | |
1010 | strncpy(gd.driver, intf->dev.driver->name, | |
1011 | sizeof(gd.driver)); | |
1012 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1013 | } | |
1da177e4 LT |
1014 | return ret; |
1015 | } | |
1016 | ||
1017 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
1018 | { | |
886ccd45 VK |
1019 | struct usbdevfs_connectinfo ci = { |
1020 | .devnum = ps->dev->devnum, | |
1021 | .slow = ps->dev->speed == USB_SPEED_LOW | |
1022 | }; | |
1da177e4 | 1023 | |
1da177e4 LT |
1024 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1025 | return -EFAULT; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static int proc_resetdevice(struct dev_state *ps) | |
1030 | { | |
742120c6 | 1031 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
1035 | { | |
1036 | struct usbdevfs_setinterface setintf; | |
1037 | int ret; | |
1038 | ||
1039 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1040 | return -EFAULT; | |
1041 | if ((ret = checkintf(ps, setintf.interface))) | |
1042 | return ret; | |
1043 | return usb_set_interface(ps->dev, setintf.interface, | |
1044 | setintf.altsetting); | |
1045 | } | |
1046 | ||
1047 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
1048 | { | |
3f141e2a | 1049 | int u; |
1da177e4 | 1050 | int status = 0; |
04e482ff | 1051 | struct usb_host_config *actconfig; |
1da177e4 | 1052 | |
3f141e2a | 1053 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1054 | return -EFAULT; |
1055 | ||
04e482ff GKH |
1056 | actconfig = ps->dev->actconfig; |
1057 | ||
1058 | /* Don't touch the device if any interfaces are claimed. | |
1059 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1060 | * an interface is claimed by usbfs it could easily deadlock. |
1061 | */ | |
04e482ff GKH |
1062 | if (actconfig) { |
1063 | int i; | |
1064 | ||
1065 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1066 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1067 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1068 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1069 | "while '%s' sets config #%d\n", |
1070 | actconfig->interface[i] | |
1071 | ->cur_altsetting | |
1072 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1073 | actconfig->interface[i] |
1074 | ->dev.driver->name, | |
1da177e4 | 1075 | current->comm, u); |
04e482ff | 1076 | status = -EBUSY; |
1da177e4 | 1077 | break; |
1da177e4 | 1078 | } |
04e482ff GKH |
1079 | } |
1080 | } | |
1da177e4 LT |
1081 | |
1082 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1083 | * so avoid usb_set_configuration()'s kick to sysfs | |
1084 | */ | |
1085 | if (status == 0) { | |
1086 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1087 | status = usb_reset_configuration(ps->dev); | |
1088 | else | |
1089 | status = usb_set_configuration(ps->dev, u); | |
1090 | } | |
1091 | ||
1092 | return status; | |
1093 | } | |
1094 | ||
1da177e4 | 1095 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1096 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1097 | void __user *arg) | |
1da177e4 LT |
1098 | { |
1099 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1100 | struct usb_host_endpoint *ep; | |
52fb743d | 1101 | struct async *as = NULL; |
1da177e4 LT |
1102 | struct usb_ctrlrequest *dr = NULL; |
1103 | unsigned int u, totlen, isofrmlen; | |
97b9eb91 | 1104 | int ret, ifnum = -1; |
93cf9b90 | 1105 | int is_in; |
1da177e4 | 1106 | |
14722ef4 AS |
1107 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1108 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1109 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1110 | USBDEVFS_URB_NO_FSBR | |
1111 | USBDEVFS_URB_ZERO_PACKET | | |
1112 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1113 | return -EINVAL; |
9180135b | 1114 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1115 | return -EINVAL; |
04e482ff GKH |
1116 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1117 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1118 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1119 | if (ifnum < 0) | |
1da177e4 | 1120 | return ifnum; |
04e482ff GKH |
1121 | ret = checkintf(ps, ifnum); |
1122 | if (ret) | |
1da177e4 LT |
1123 | return ret; |
1124 | } | |
93cf9b90 AS |
1125 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1126 | is_in = 1; | |
1127 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1128 | } else { | |
1129 | is_in = 0; | |
1130 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1131 | } | |
1da177e4 LT |
1132 | if (!ep) |
1133 | return -ENOENT; | |
add1aaea AS |
1134 | |
1135 | u = 0; | |
1da177e4 LT |
1136 | switch(uurb->type) { |
1137 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1138 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1139 | return -EINVAL; |
add1aaea AS |
1140 | /* min 8 byte setup packet */ |
1141 | if (uurb->buffer_length < 8) | |
1da177e4 | 1142 | return -EINVAL; |
04e482ff GKH |
1143 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1144 | if (!dr) | |
1da177e4 LT |
1145 | return -ENOMEM; |
1146 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1147 | ret = -EFAULT; |
1148 | goto error; | |
1da177e4 LT |
1149 | } |
1150 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1151 | ret = -EINVAL; |
1152 | goto error; | |
1da177e4 | 1153 | } |
393cbb51 | 1154 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1155 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1156 | if (ret) |
1157 | goto error; | |
1da177e4 LT |
1158 | uurb->number_of_packets = 0; |
1159 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1160 | uurb->buffer += 8; | |
93cf9b90 AS |
1161 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1162 | is_in = 1; | |
1163 | uurb->endpoint |= USB_DIR_IN; | |
1164 | } else { | |
1165 | is_in = 0; | |
1166 | uurb->endpoint &= ~USB_DIR_IN; | |
1167 | } | |
0880aef4 CF |
1168 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1169 | "bRequest=%02x wValue=%04x " | |
1170 | "wIndex=%04x wLength=%04x\n", | |
1171 | dr->bRequestType, dr->bRequest, | |
1172 | __le16_to_cpup(&dr->wValue), | |
1173 | __le16_to_cpup(&dr->wIndex), | |
1174 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1175 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1176 | break; |
1177 | ||
1178 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1179 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1180 | case USB_ENDPOINT_XFER_CONTROL: |
1181 | case USB_ENDPOINT_XFER_ISOC: | |
1182 | return -EINVAL; | |
f661c6f8 AS |
1183 | case USB_ENDPOINT_XFER_INT: |
1184 | /* allow single-shot interrupt transfers */ | |
1185 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1186 | goto interrupt_urb; | |
1da177e4 LT |
1187 | } |
1188 | uurb->number_of_packets = 0; | |
1da177e4 LT |
1189 | break; |
1190 | ||
f661c6f8 AS |
1191 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1192 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1193 | return -EINVAL; | |
1194 | interrupt_urb: | |
1195 | uurb->number_of_packets = 0; | |
f661c6f8 AS |
1196 | break; |
1197 | ||
1da177e4 LT |
1198 | case USBDEVFS_URB_TYPE_ISO: |
1199 | /* arbitrary limit */ | |
04e482ff GKH |
1200 | if (uurb->number_of_packets < 1 || |
1201 | uurb->number_of_packets > 128) | |
1da177e4 | 1202 | return -EINVAL; |
93cf9b90 | 1203 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1204 | return -EINVAL; |
04e482ff GKH |
1205 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1206 | uurb->number_of_packets; | |
1da177e4 LT |
1207 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1208 | return -ENOMEM; | |
1209 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
52fb743d AS |
1210 | ret = -EFAULT; |
1211 | goto error; | |
1da177e4 LT |
1212 | } |
1213 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1214 | /* arbitrary limit, |
1215 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1216 | if (isopkt[u].length > 8192) { |
52fb743d AS |
1217 | ret = -EINVAL; |
1218 | goto error; | |
1da177e4 LT |
1219 | } |
1220 | totlen += isopkt[u].length; | |
1221 | } | |
add1aaea | 1222 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1223 | uurb->buffer_length = totlen; |
1224 | break; | |
1225 | ||
1da177e4 LT |
1226 | default: |
1227 | return -EINVAL; | |
1228 | } | |
add1aaea AS |
1229 | |
1230 | if (uurb->buffer_length > MAX_USBFS_MEMORY_USAGE) { | |
1231 | ret = -EINVAL; | |
1232 | goto error; | |
1233 | } | |
9180135b AS |
1234 | if (uurb->buffer_length > 0 && |
1235 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1236 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1237 | ret = -EFAULT; |
1238 | goto error; | |
1da177e4 | 1239 | } |
9180135b AS |
1240 | as = alloc_async(uurb->number_of_packets); |
1241 | if (!as) { | |
52fb743d AS |
1242 | ret = -ENOMEM; |
1243 | goto error; | |
1da177e4 | 1244 | } |
add1aaea AS |
1245 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length; |
1246 | ret = usbfs_increase_memory_usage(u); | |
1247 | if (ret) | |
1248 | goto error; | |
1249 | as->mem_usage = u; | |
1250 | ||
9180135b AS |
1251 | if (uurb->buffer_length > 0) { |
1252 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1253 | GFP_KERNEL); | |
1254 | if (!as->urb->transfer_buffer) { | |
52fb743d AS |
1255 | ret = -ENOMEM; |
1256 | goto error; | |
9180135b | 1257 | } |
7152b592 AS |
1258 | /* Isochronous input data may end up being discontiguous |
1259 | * if some of the packets are short. Clear the buffer so | |
1260 | * that the gaps don't leak kernel data to userspace. | |
1261 | */ | |
1262 | if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1263 | memset(as->urb->transfer_buffer, 0, | |
1264 | uurb->buffer_length); | |
9180135b | 1265 | } |
04e482ff GKH |
1266 | as->urb->dev = ps->dev; |
1267 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1268 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1269 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1270 | |
1271 | /* This tedious sequence is necessary because the URB_* flags | |
1272 | * are internal to the kernel and subject to change, whereas | |
1273 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1274 | */ | |
1275 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1276 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1277 | u |= URB_ISO_ASAP; | |
1278 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1279 | u |= URB_SHORT_NOT_OK; | |
1280 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1281 | u |= URB_NO_FSBR; | |
1282 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1283 | u |= URB_ZERO_PACKET; | |
1284 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1285 | u |= URB_NO_INTERRUPT; | |
1286 | as->urb->transfer_flags = u; | |
1287 | ||
1da177e4 | 1288 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1289 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1290 | dr = NULL; |
1da177e4 LT |
1291 | as->urb->start_frame = uurb->start_frame; |
1292 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1293 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1294 | ps->dev->speed == USB_SPEED_HIGH) | |
1295 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1296 | else | |
1297 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1298 | as->urb->context = as; |
1299 | as->urb->complete = async_completed; | |
1da177e4 LT |
1300 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1301 | as->urb->iso_frame_desc[u].offset = totlen; | |
1302 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1303 | totlen += isopkt[u].length; | |
1304 | } | |
6fd19f4b | 1305 | kfree(isopkt); |
52fb743d | 1306 | isopkt = NULL; |
1da177e4 | 1307 | as->ps = ps; |
04e482ff | 1308 | as->userurb = arg; |
9180135b | 1309 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1310 | as->userbuffer = uurb->buffer; |
1311 | else | |
1312 | as->userbuffer = NULL; | |
1313 | as->signr = uurb->signr; | |
1314 | as->ifnum = ifnum; | |
2425c08b | 1315 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1316 | as->cred = get_current_cred(); |
7a01955f | 1317 | security_task_getsecid(current, &as->secid); |
9180135b | 1318 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1319 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1320 | uurb->buffer_length)) { |
52fb743d AS |
1321 | ret = -EFAULT; |
1322 | goto error; | |
1da177e4 LT |
1323 | } |
1324 | } | |
4c6e8971 | 1325 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 CF |
1326 | as->urb->transfer_buffer_length, 0, SUBMIT, |
1327 | is_in ? NULL : as->urb->transfer_buffer, | |
1328 | uurb->buffer_length); | |
04e482ff | 1329 | async_newpending(as); |
01c6460f AS |
1330 | |
1331 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1332 | spin_lock_irq(&ps->lock); | |
1333 | ||
1334 | /* Not exactly the endpoint address; the direction bit is | |
1335 | * shifted to the 0x10 position so that the value will be | |
1336 | * between 0 and 31. | |
1337 | */ | |
1338 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1339 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1340 | >> 3); | |
1341 | ||
1342 | /* If this bulk URB is the start of a new transfer, re-enable | |
1343 | * the endpoint. Otherwise mark it as a continuation URB. | |
1344 | */ | |
1345 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1346 | as->bulk_status = AS_CONTINUATION; | |
1347 | else | |
1348 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1349 | ||
1350 | /* Don't accept continuation URBs if the endpoint is | |
1351 | * disabled because of an earlier error. | |
1352 | */ | |
1353 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1354 | ret = -EREMOTEIO; | |
1355 | else | |
1356 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1357 | spin_unlock_irq(&ps->lock); | |
1358 | } else { | |
1359 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1360 | } | |
1361 | ||
1362 | if (ret) { | |
04e482ff GKH |
1363 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1364 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1365 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1366 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1367 | async_removepending(as); |
52fb743d | 1368 | goto error; |
04e482ff GKH |
1369 | } |
1370 | return 0; | |
52fb743d AS |
1371 | |
1372 | error: | |
1373 | kfree(isopkt); | |
1374 | kfree(dr); | |
1375 | if (as) | |
1376 | free_async(as); | |
1377 | return ret; | |
1da177e4 LT |
1378 | } |
1379 | ||
1380 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1381 | { | |
1382 | struct usbdevfs_urb uurb; | |
1383 | ||
1384 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1385 | return -EFAULT; | |
1386 | ||
04e482ff GKH |
1387 | return proc_do_submiturb(ps, &uurb, |
1388 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1389 | arg); | |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1393 | { | |
1394 | struct async *as; | |
1395 | ||
1396 | as = async_getpending(ps, arg); | |
1397 | if (!as) | |
1398 | return -EINVAL; | |
1399 | usb_kill_urb(as->urb); | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | static int processcompl(struct async *as, void __user * __user *arg) | |
1404 | { | |
1405 | struct urb *urb = as->urb; | |
1406 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1407 | void __user *addr = as->userurb; | |
1408 | unsigned int i; | |
1409 | ||
7152b592 AS |
1410 | if (as->userbuffer && urb->actual_length) { |
1411 | if (urb->number_of_packets > 0) /* Isochronous */ | |
1412 | i = urb->transfer_buffer_length; | |
1413 | else /* Non-Isoc */ | |
1414 | i = urb->actual_length; | |
1415 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, i)) | |
d794a021 | 1416 | goto err_out; |
7152b592 | 1417 | } |
e015268d | 1418 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1419 | goto err_out; |
1da177e4 | 1420 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1421 | goto err_out; |
1da177e4 | 1422 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1423 | goto err_out; |
1da177e4 | 1424 | |
93cf9b90 | 1425 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1426 | for (i = 0; i < urb->number_of_packets; i++) { |
1427 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1428 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1429 | goto err_out; |
668a9541 CL |
1430 | if (put_user(urb->iso_frame_desc[i].status, |
1431 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1432 | goto err_out; |
668a9541 | 1433 | } |
1da177e4 LT |
1434 | } |
1435 | ||
1da177e4 LT |
1436 | if (put_user(addr, (void __user * __user *)arg)) |
1437 | return -EFAULT; | |
1438 | return 0; | |
d794a021 ON |
1439 | |
1440 | err_out: | |
d794a021 | 1441 | return -EFAULT; |
1da177e4 LT |
1442 | } |
1443 | ||
04e482ff | 1444 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1445 | { |
04e482ff | 1446 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1447 | struct async *as = NULL; |
1448 | struct usb_device *dev = ps->dev; | |
1449 | ||
1450 | add_wait_queue(&ps->wait, &wait); | |
1451 | for (;;) { | |
1452 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1453 | as = async_getcompleted(ps); |
1454 | if (as) | |
1da177e4 LT |
1455 | break; |
1456 | if (signal_pending(current)) | |
1457 | break; | |
1458 | usb_unlock_device(dev); | |
1459 | schedule(); | |
1460 | usb_lock_device(dev); | |
1461 | } | |
1462 | remove_wait_queue(&ps->wait, &wait); | |
1463 | set_current_state(TASK_RUNNING); | |
1464 | return as; | |
1465 | } | |
1466 | ||
1467 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1468 | { | |
1469 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1470 | if (as) { |
1471 | int retval = processcompl(as, (void __user * __user *)arg); | |
1472 | free_async(as); | |
1473 | return retval; | |
1474 | } | |
1da177e4 LT |
1475 | if (signal_pending(current)) |
1476 | return -EINTR; | |
1477 | return -EIO; | |
1478 | } | |
1479 | ||
1480 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1481 | { | |
ddeee0b2 | 1482 | int retval; |
1da177e4 LT |
1483 | struct async *as; |
1484 | ||
ddeee0b2 LT |
1485 | as = async_getcompleted(ps); |
1486 | retval = -EAGAIN; | |
1487 | if (as) { | |
1488 | retval = processcompl(as, (void __user * __user *)arg); | |
1489 | free_async(as); | |
1490 | } | |
1491 | return retval; | |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1495 | static int proc_control_compat(struct dev_state *ps, |
1496 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1497 | { | |
1498 | struct usbdevfs_ctrltransfer __user *p; | |
1499 | __u32 udata; | |
1500 | p = compat_alloc_user_space(sizeof(*p)); | |
1501 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1502 | get_user(udata, &p32->data) || | |
1503 | put_user(compat_ptr(udata), &p->data)) | |
1504 | return -EFAULT; | |
1505 | return proc_control(ps, p); | |
1506 | } | |
1507 | ||
1508 | static int proc_bulk_compat(struct dev_state *ps, | |
1509 | struct usbdevfs_bulktransfer32 __user *p32) | |
1510 | { | |
1511 | struct usbdevfs_bulktransfer __user *p; | |
1512 | compat_uint_t n; | |
1513 | compat_caddr_t addr; | |
1514 | ||
1515 | p = compat_alloc_user_space(sizeof(*p)); | |
1516 | ||
1517 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1518 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1519 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1520 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1521 | return -EFAULT; | |
1522 | ||
1523 | return proc_bulk(ps, p); | |
1524 | } | |
1525 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1526 | { | |
1527 | struct usbdevfs_disconnectsignal32 ds; | |
1528 | ||
1529 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1530 | return -EFAULT; | |
1531 | ps->discsignr = ds.signr; | |
1532 | ps->disccontext = compat_ptr(ds.context); | |
1533 | return 0; | |
1534 | } | |
1da177e4 LT |
1535 | |
1536 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1537 | struct usbdevfs_urb32 __user *uurb) | |
1538 | { | |
1539 | __u32 uptr; | |
18753ebc MB |
1540 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1541 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1542 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1543 | __get_user(kurb->status, &uurb->status) || | |
1544 | __get_user(kurb->flags, &uurb->flags) || | |
1545 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1546 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1547 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1548 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1549 | __get_user(kurb->error_count, &uurb->error_count) || | |
1550 | __get_user(kurb->signr, &uurb->signr)) | |
1551 | return -EFAULT; | |
1552 | ||
1553 | if (__get_user(uptr, &uurb->buffer)) | |
1554 | return -EFAULT; | |
1555 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1556 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1557 | return -EFAULT; |
1558 | kurb->usercontext = compat_ptr(uptr); | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1564 | { | |
1565 | struct usbdevfs_urb uurb; | |
1566 | ||
04e482ff | 1567 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1568 | return -EFAULT; |
1569 | ||
04e482ff GKH |
1570 | return proc_do_submiturb(ps, &uurb, |
1571 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1572 | arg); | |
1da177e4 LT |
1573 | } |
1574 | ||
1575 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1576 | { | |
1577 | struct urb *urb = as->urb; | |
1578 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1579 | void __user *addr = as->userurb; | |
1580 | unsigned int i; | |
1581 | ||
d4a4683c | 1582 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1583 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1584 | urb->actual_length)) |
1da177e4 | 1585 | return -EFAULT; |
e015268d | 1586 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1587 | return -EFAULT; |
1588 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1589 | return -EFAULT; | |
1590 | if (put_user(urb->error_count, &userurb->error_count)) | |
1591 | return -EFAULT; | |
1592 | ||
93cf9b90 | 1593 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1594 | for (i = 0; i < urb->number_of_packets; i++) { |
1595 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1596 | &userurb->iso_frame_desc[i].actual_length)) | |
1597 | return -EFAULT; | |
1598 | if (put_user(urb->iso_frame_desc[i].status, | |
1599 | &userurb->iso_frame_desc[i].status)) | |
1600 | return -EFAULT; | |
1601 | } | |
1da177e4 LT |
1602 | } |
1603 | ||
c714de5d | 1604 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1605 | return -EFAULT; |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1610 | { | |
1611 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1612 | if (as) { |
1613 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1614 | free_async(as); | |
1615 | return retval; | |
1616 | } | |
1da177e4 LT |
1617 | if (signal_pending(current)) |
1618 | return -EINTR; | |
1619 | return -EIO; | |
1620 | } | |
1621 | ||
1622 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1623 | { | |
ddeee0b2 | 1624 | int retval; |
1da177e4 LT |
1625 | struct async *as; |
1626 | ||
ddeee0b2 LT |
1627 | retval = -EAGAIN; |
1628 | as = async_getcompleted(ps); | |
1629 | if (as) { | |
1630 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1631 | free_async(as); | |
1632 | } | |
1633 | return retval; | |
1da177e4 LT |
1634 | } |
1635 | ||
637e8a60 | 1636 | |
1da177e4 LT |
1637 | #endif |
1638 | ||
1639 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1640 | { | |
1641 | struct usbdevfs_disconnectsignal ds; | |
1642 | ||
1643 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1644 | return -EFAULT; | |
1da177e4 LT |
1645 | ps->discsignr = ds.signr; |
1646 | ps->disccontext = ds.context; | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1651 | { | |
1652 | unsigned int ifnum; | |
1653 | ||
1654 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1655 | return -EFAULT; | |
1656 | return claimintf(ps, ifnum); | |
1657 | } | |
1658 | ||
1659 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1660 | { | |
1661 | unsigned int ifnum; | |
1662 | int ret; | |
1663 | ||
1664 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1665 | return -EFAULT; | |
1666 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1667 | return ret; | |
1668 | destroy_async_on_interface (ps, ifnum); | |
1669 | return 0; | |
1670 | } | |
1671 | ||
c36fc889 | 1672 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1673 | { |
1da177e4 LT |
1674 | int size; |
1675 | void *buf = NULL; | |
1676 | int retval = 0; | |
1677 | struct usb_interface *intf = NULL; | |
1678 | struct usb_driver *driver = NULL; | |
1da177e4 | 1679 | |
c36fc889 | 1680 | /* alloc buffer */ |
04e482ff GKH |
1681 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1682 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1683 | return -ENOMEM; |
c36fc889 | 1684 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1685 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1686 | kfree(buf); |
1da177e4 LT |
1687 | return -EFAULT; |
1688 | } | |
1689 | } else { | |
04e482ff | 1690 | memset(buf, 0, size); |
1da177e4 LT |
1691 | } |
1692 | } | |
1693 | ||
349710c3 | 1694 | if (!connected(ps)) { |
6fd19f4b | 1695 | kfree(buf); |
1da177e4 LT |
1696 | return -ENODEV; |
1697 | } | |
1698 | ||
1699 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1700 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1701 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1702 | retval = -EINVAL; | |
c36fc889 | 1703 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1704 | |
1705 | /* disconnect kernel driver from interface */ | |
1706 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1707 | if (intf->dev.driver) { |
1708 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1709 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1710 | usb_driver_release_interface(driver, intf); |
1711 | } else | |
1712 | retval = -ENODATA; | |
1da177e4 LT |
1713 | break; |
1714 | ||
1715 | /* let kernel drivers try to (re)bind to the interface */ | |
1716 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1717 | if (!intf->dev.driver) |
1718 | retval = device_attach(&intf->dev); | |
1719 | else | |
1720 | retval = -EBUSY; | |
1da177e4 LT |
1721 | break; |
1722 | ||
1723 | /* talk directly to the interface's driver */ | |
1724 | default: | |
1da177e4 LT |
1725 | if (intf->dev.driver) |
1726 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 1727 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
1728 | retval = -ENOTTY; |
1729 | } else { | |
c532b29a | 1730 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1731 | if (retval == -ENOIOCTLCMD) |
1732 | retval = -ENOTTY; | |
1733 | } | |
1da177e4 LT |
1734 | } |
1735 | ||
1736 | /* cleanup and return */ | |
1737 | if (retval >= 0 | |
04e482ff | 1738 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1739 | && size > 0 |
04e482ff | 1740 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1741 | retval = -EFAULT; |
6fd19f4b JJ |
1742 | |
1743 | kfree(buf); | |
1da177e4 LT |
1744 | return retval; |
1745 | } | |
1746 | ||
c36fc889 PZ |
1747 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1748 | { | |
1749 | struct usbdevfs_ioctl ctrl; | |
1750 | ||
04e482ff | 1751 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1752 | return -EFAULT; |
1753 | return proc_ioctl(ps, &ctrl); | |
1754 | } | |
1755 | ||
1756 | #ifdef CONFIG_COMPAT | |
777da590 | 1757 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1758 | { |
1759 | struct usbdevfs_ioctl32 __user *uioc; | |
1760 | struct usbdevfs_ioctl ctrl; | |
1761 | u32 udata; | |
1762 | ||
058120d7 | 1763 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1764 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1765 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1766 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1767 | __get_user(udata, &uioc->data)) |
1768 | return -EFAULT; | |
1769 | ctrl.data = compat_ptr(udata); | |
1770 | ||
1771 | return proc_ioctl(ps, &ctrl); | |
1772 | } | |
1773 | #endif | |
1774 | ||
7cbe5dca AS |
1775 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1776 | { | |
1777 | unsigned portnum; | |
1778 | int rc; | |
1779 | ||
1780 | if (get_user(portnum, (unsigned __user *) arg)) | |
1781 | return -EFAULT; | |
1782 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1783 | if (rc == 0) | |
1784 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1785 | portnum, task_pid_nr(current), current->comm); | |
1786 | return rc; | |
1787 | } | |
1788 | ||
1789 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1790 | { | |
1791 | unsigned portnum; | |
1792 | ||
1793 | if (get_user(portnum, (unsigned __user *) arg)) | |
1794 | return -EFAULT; | |
1795 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1796 | } | |
1797 | ||
1da177e4 LT |
1798 | /* |
1799 | * NOTE: All requests here that have interface numbers as parameters | |
1800 | * are assuming that somehow the configuration has been prevented from | |
1801 | * changing. But there's no mechanism to ensure that... | |
1802 | */ | |
637e8a60 AB |
1803 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1804 | void __user *p) | |
1da177e4 | 1805 | { |
ec17cf1c | 1806 | struct dev_state *ps = file->private_data; |
637e8a60 | 1807 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 | 1808 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1809 | int ret = -ENOTTY; |
1810 | ||
1811 | if (!(file->f_mode & FMODE_WRITE)) | |
1812 | return -EPERM; | |
01412a21 | 1813 | |
1da177e4 | 1814 | usb_lock_device(dev); |
349710c3 | 1815 | if (!connected(ps)) { |
1da177e4 LT |
1816 | usb_unlock_device(dev); |
1817 | return -ENODEV; | |
1818 | } | |
1819 | ||
1820 | switch (cmd) { | |
1821 | case USBDEVFS_CONTROL: | |
441b62c1 | 1822 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1823 | ret = proc_control(ps, p); |
1824 | if (ret >= 0) | |
1825 | inode->i_mtime = CURRENT_TIME; | |
1826 | break; | |
1827 | ||
1828 | case USBDEVFS_BULK: | |
441b62c1 | 1829 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1830 | ret = proc_bulk(ps, p); |
1831 | if (ret >= 0) | |
1832 | inode->i_mtime = CURRENT_TIME; | |
1833 | break; | |
1834 | ||
1835 | case USBDEVFS_RESETEP: | |
441b62c1 | 1836 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1837 | ret = proc_resetep(ps, p); |
1838 | if (ret >= 0) | |
1839 | inode->i_mtime = CURRENT_TIME; | |
1840 | break; | |
1841 | ||
1842 | case USBDEVFS_RESET: | |
441b62c1 | 1843 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1844 | ret = proc_resetdevice(ps); |
1845 | break; | |
1846 | ||
1847 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1848 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1849 | ret = proc_clearhalt(ps, p); |
1850 | if (ret >= 0) | |
1851 | inode->i_mtime = CURRENT_TIME; | |
1852 | break; | |
1853 | ||
1854 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1855 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1856 | ret = proc_getdriver(ps, p); |
1857 | break; | |
1858 | ||
1859 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1860 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1861 | ret = proc_connectinfo(ps, p); |
1862 | break; | |
1863 | ||
1864 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1865 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1866 | ret = proc_setintf(ps, p); |
1867 | break; | |
1868 | ||
1869 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1870 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1871 | ret = proc_setconfig(ps, p); |
1872 | break; | |
1873 | ||
1874 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1875 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1876 | ret = proc_submiturb(ps, p); |
1877 | if (ret >= 0) | |
1878 | inode->i_mtime = CURRENT_TIME; | |
1879 | break; | |
1880 | ||
1881 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1882 | case USBDEVFS_CONTROL32: |
1883 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
1884 | ret = proc_control_compat(ps, p); | |
1885 | if (ret >= 0) | |
1886 | inode->i_mtime = CURRENT_TIME; | |
1887 | break; | |
1888 | ||
1889 | case USBDEVFS_BULK32: | |
1890 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
1891 | ret = proc_bulk_compat(ps, p); | |
1892 | if (ret >= 0) | |
1893 | inode->i_mtime = CURRENT_TIME; | |
1894 | break; | |
1895 | ||
1896 | case USBDEVFS_DISCSIGNAL32: | |
1897 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
1898 | ret = proc_disconnectsignal_compat(ps, p); | |
1899 | break; | |
1da177e4 LT |
1900 | |
1901 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1902 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1903 | ret = proc_submiturb_compat(ps, p); |
1904 | if (ret >= 0) | |
1905 | inode->i_mtime = CURRENT_TIME; | |
1906 | break; | |
1907 | ||
1908 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1909 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1910 | ret = proc_reapurb_compat(ps, p); |
1911 | break; | |
1912 | ||
1913 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 1914 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
1915 | ret = proc_reapurbnonblock_compat(ps, p); |
1916 | break; | |
1917 | ||
c36fc889 | 1918 | case USBDEVFS_IOCTL32: |
637e8a60 | 1919 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 1920 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1921 | break; |
1da177e4 LT |
1922 | #endif |
1923 | ||
1924 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1925 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1926 | ret = proc_unlinkurb(ps, p); |
1927 | break; | |
1928 | ||
1929 | case USBDEVFS_REAPURB: | |
441b62c1 | 1930 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1931 | ret = proc_reapurb(ps, p); |
1932 | break; | |
1933 | ||
1934 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 1935 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
1936 | ret = proc_reapurbnonblock(ps, p); |
1937 | break; | |
1938 | ||
1939 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1940 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1941 | ret = proc_disconnectsignal(ps, p); |
1942 | break; | |
1943 | ||
1944 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1945 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1946 | ret = proc_claiminterface(ps, p); |
1947 | break; | |
1948 | ||
1949 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1950 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1951 | ret = proc_releaseinterface(ps, p); |
1952 | break; | |
1953 | ||
1954 | case USBDEVFS_IOCTL: | |
441b62c1 | 1955 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1956 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1957 | break; |
7cbe5dca AS |
1958 | |
1959 | case USBDEVFS_CLAIM_PORT: | |
1960 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1961 | ret = proc_claim_port(ps, p); | |
1962 | break; | |
1963 | ||
1964 | case USBDEVFS_RELEASE_PORT: | |
1965 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1966 | ret = proc_release_port(ps, p); | |
1967 | break; | |
1da177e4 LT |
1968 | } |
1969 | usb_unlock_device(dev); | |
1970 | if (ret >= 0) | |
1971 | inode->i_atime = CURRENT_TIME; | |
1972 | return ret; | |
1973 | } | |
1974 | ||
637e8a60 AB |
1975 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
1976 | unsigned long arg) | |
1977 | { | |
1978 | int ret; | |
1979 | ||
637e8a60 | 1980 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
1981 | |
1982 | return ret; | |
1983 | } | |
1984 | ||
1985 | #ifdef CONFIG_COMPAT | |
1986 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
1987 | unsigned long arg) | |
1988 | { | |
1989 | int ret; | |
1990 | ||
637e8a60 | 1991 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
1992 | |
1993 | return ret; | |
1994 | } | |
1995 | #endif | |
1996 | ||
1da177e4 | 1997 | /* No kernel lock - fine */ |
04e482ff GKH |
1998 | static unsigned int usbdev_poll(struct file *file, |
1999 | struct poll_table_struct *wait) | |
1da177e4 | 2000 | { |
ec17cf1c TK |
2001 | struct dev_state *ps = file->private_data; |
2002 | unsigned int mask = 0; | |
1da177e4 LT |
2003 | |
2004 | poll_wait(file, &ps->wait, wait); | |
2005 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2006 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2007 | if (!connected(ps)) |
1da177e4 LT |
2008 | mask |= POLLERR | POLLHUP; |
2009 | return mask; | |
2010 | } | |
2011 | ||
9f8b17e6 | 2012 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
2013 | .owner = THIS_MODULE, |
2014 | .llseek = usbdev_lseek, | |
2015 | .read = usbdev_read, | |
2016 | .poll = usbdev_poll, | |
2017 | .unlocked_ioctl = usbdev_ioctl, | |
2018 | #ifdef CONFIG_COMPAT | |
2019 | .compat_ioctl = usbdev_compat_ioctl, | |
2020 | #endif | |
2021 | .open = usbdev_open, | |
2022 | .release = usbdev_release, | |
1da177e4 | 2023 | }; |
fbf82fd2 | 2024 | |
501950d8 | 2025 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
2026 | { |
2027 | struct dev_state *ps; | |
2028 | struct siginfo sinfo; | |
2029 | ||
2030 | while (!list_empty(&udev->filelist)) { | |
2031 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
2032 | destroy_all_async(ps); | |
2033 | wake_up_all(&ps->wait); | |
2034 | list_del_init(&ps->list); | |
2035 | if (ps->discsignr) { | |
2036 | sinfo.si_signo = ps->discsignr; | |
2037 | sinfo.si_errno = EPIPE; | |
2038 | sinfo.si_code = SI_ASYNCIO; | |
2039 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2040 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2041 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2042 | } |
2043 | } | |
2044 | } | |
2045 | ||
9f8b17e6 KS |
2046 | #ifdef CONFIG_USB_DEVICE_CLASS |
2047 | static struct class *usb_classdev_class; | |
2048 | ||
2049 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 2050 | { |
e04199b2 AS |
2051 | struct device *cldev; |
2052 | ||
b0b090e5 GKH |
2053 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
2054 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
2055 | dev->devnum); | |
e04199b2 AS |
2056 | if (IS_ERR(cldev)) |
2057 | return PTR_ERR(cldev); | |
2058 | dev->usb_classdev = cldev; | |
27d39e26 | 2059 | return 0; |
fbf82fd2 KS |
2060 | } |
2061 | ||
9f8b17e6 | 2062 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 2063 | { |
e04199b2 AS |
2064 | if (dev->usb_classdev) |
2065 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
2066 | } |
2067 | ||
501950d8 AS |
2068 | #else |
2069 | #define usb_classdev_add(dev) 0 | |
2070 | #define usb_classdev_remove(dev) do {} while (0) | |
2071 | ||
2072 | #endif | |
2073 | ||
2074 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 2075 | unsigned long action, void *dev) |
a7b986b3 GKH |
2076 | { |
2077 | switch (action) { | |
2078 | case USB_DEVICE_ADD: | |
9f8b17e6 | 2079 | if (usb_classdev_add(dev)) |
27d39e26 | 2080 | return NOTIFY_BAD; |
a7b986b3 GKH |
2081 | break; |
2082 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 2083 | usb_classdev_remove(dev); |
501950d8 | 2084 | usbdev_remove(dev); |
a7b986b3 GKH |
2085 | break; |
2086 | } | |
2087 | return NOTIFY_OK; | |
2088 | } | |
2089 | ||
2090 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2091 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2092 | }; |
2093 | ||
7e7654a9 | 2094 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2095 | |
9f8b17e6 | 2096 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2097 | { |
2098 | int retval; | |
2099 | ||
fad21bdf | 2100 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2101 | "usb_device"); |
fbf82fd2 | 2102 | if (retval) { |
69a85942 | 2103 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2104 | goto out; |
2105 | } | |
9f8b17e6 | 2106 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2107 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2108 | if (retval) { |
69a85942 GKH |
2109 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2110 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2111 | goto error_cdev; |
fbf82fd2 | 2112 | } |
9f8b17e6 KS |
2113 | #ifdef CONFIG_USB_DEVICE_CLASS |
2114 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
2115 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 2116 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
2117 | retval = PTR_ERR(usb_classdev_class); |
2118 | cdev_del(&usb_device_cdev); | |
2119 | usb_classdev_class = NULL; | |
2120 | goto out; | |
fbf82fd2 | 2121 | } |
e105b8bf DW |
2122 | /* devices of this class shadow the major:minor of their parent |
2123 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
2124 | * to /sys/dev | |
2125 | */ | |
2126 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 2127 | #endif |
501950d8 | 2128 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2129 | out: |
2130 | return retval; | |
a7b986b3 | 2131 | |
a7b986b3 GKH |
2132 | error_cdev: |
2133 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2134 | goto out; | |
fbf82fd2 KS |
2135 | } |
2136 | ||
9f8b17e6 | 2137 | void usb_devio_cleanup(void) |
fbf82fd2 | 2138 | { |
a7b986b3 | 2139 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 2140 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
2141 | class_destroy(usb_classdev_class); |
2142 | #endif | |
fbf82fd2 | 2143 | cdev_del(&usb_device_cdev); |
fad21bdf | 2144 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2145 | } |