]>
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> |
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 | 112 | /* Limit on the total amount of memory we can allocate for transfers */ |
3f5eb8d5 AS |
113 | static unsigned usbfs_memory_mb = 16; |
114 | module_param(usbfs_memory_mb, uint, 0644); | |
115 | MODULE_PARM_DESC(usbfs_memory_mb, | |
116 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
117 | ||
118 | /* Hard limit, necessary to avoid aithmetic overflow */ | |
119 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) | |
1da177e4 | 120 | |
add1aaea AS |
121 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
122 | ||
123 | /* Check whether it's okay to allocate more memory for a transfer */ | |
124 | static int usbfs_increase_memory_usage(unsigned amount) | |
125 | { | |
3f5eb8d5 AS |
126 | unsigned lim; |
127 | ||
128 | /* | |
129 | * Convert usbfs_memory_mb to bytes, avoiding overflows. | |
130 | * 0 means use the hard limit (effectively unlimited). | |
131 | */ | |
132 | lim = ACCESS_ONCE(usbfs_memory_mb); | |
133 | if (lim == 0 || lim > (USBFS_XFER_MAX >> 20)) | |
134 | lim = USBFS_XFER_MAX; | |
135 | else | |
136 | lim <<= 20; | |
137 | ||
add1aaea | 138 | atomic_add(amount, &usbfs_memory_usage); |
3f5eb8d5 | 139 | if (atomic_read(&usbfs_memory_usage) <= lim) |
add1aaea AS |
140 | return 0; |
141 | atomic_sub(amount, &usbfs_memory_usage); | |
142 | return -ENOMEM; | |
143 | } | |
144 | ||
145 | /* Memory for a transfer is being deallocated */ | |
146 | static void usbfs_decrease_memory_usage(unsigned amount) | |
147 | { | |
148 | atomic_sub(amount, &usbfs_memory_usage); | |
149 | } | |
4c6e8971 | 150 | |
d34d9721 | 151 | static int connected(struct dev_state *ps) |
1da177e4 | 152 | { |
349710c3 AS |
153 | return (!list_empty(&ps->list) && |
154 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
155 | } |
156 | ||
157 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
158 | { | |
159 | loff_t ret; | |
160 | ||
f9de332e | 161 | mutex_lock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
162 | |
163 | switch (orig) { | |
164 | case 0: | |
165 | file->f_pos = offset; | |
166 | ret = file->f_pos; | |
167 | break; | |
168 | case 1: | |
169 | file->f_pos += offset; | |
170 | ret = file->f_pos; | |
171 | break; | |
172 | case 2: | |
173 | default: | |
174 | ret = -EINVAL; | |
175 | } | |
176 | ||
f9de332e | 177 | mutex_unlock(&file->f_dentry->d_inode->i_mutex); |
1da177e4 LT |
178 | return ret; |
179 | } | |
180 | ||
04e482ff GKH |
181 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
182 | loff_t *ppos) | |
1da177e4 | 183 | { |
ec17cf1c | 184 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
185 | struct usb_device *dev = ps->dev; |
186 | ssize_t ret = 0; | |
187 | unsigned len; | |
188 | loff_t pos; | |
189 | int i; | |
190 | ||
191 | pos = *ppos; | |
192 | usb_lock_device(dev); | |
349710c3 | 193 | if (!connected(ps)) { |
1da177e4 LT |
194 | ret = -ENODEV; |
195 | goto err; | |
196 | } else if (pos < 0) { | |
197 | ret = -EINVAL; | |
198 | goto err; | |
199 | } | |
200 | ||
201 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
202 | /* 18 bytes - fits on the stack */ |
203 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
204 | |
205 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
206 | le16_to_cpus(&temp_desc.bcdUSB); |
207 | le16_to_cpus(&temp_desc.idVendor); | |
208 | le16_to_cpus(&temp_desc.idProduct); | |
209 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
210 | |
211 | len = sizeof(struct usb_device_descriptor) - pos; | |
212 | if (len > nbytes) | |
213 | len = nbytes; | |
8781ba0a | 214 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
215 | ret = -EFAULT; |
216 | goto err; | |
217 | } | |
1da177e4 LT |
218 | |
219 | *ppos += len; | |
220 | buf += len; | |
221 | nbytes -= len; | |
222 | ret += len; | |
223 | } | |
224 | ||
225 | pos = sizeof(struct usb_device_descriptor); | |
226 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
227 | struct usb_config_descriptor *config = | |
228 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
229 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
230 | ||
231 | if (*ppos < pos + length) { | |
232 | ||
233 | /* The descriptor may claim to be longer than it | |
234 | * really is. Here is the actual allocated length. */ | |
235 | unsigned alloclen = | |
236 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
237 | ||
238 | len = length - (*ppos - pos); | |
239 | if (len > nbytes) | |
240 | len = nbytes; | |
241 | ||
242 | /* Simply don't write (skip over) unallocated parts */ | |
243 | if (alloclen > (*ppos - pos)) { | |
244 | alloclen -= (*ppos - pos); | |
245 | if (copy_to_user(buf, | |
246 | dev->rawdescriptors[i] + (*ppos - pos), | |
247 | min(len, alloclen))) { | |
248 | ret = -EFAULT; | |
249 | goto err; | |
250 | } | |
251 | } | |
252 | ||
253 | *ppos += len; | |
254 | buf += len; | |
255 | nbytes -= len; | |
256 | ret += len; | |
257 | } | |
258 | ||
259 | pos += length; | |
260 | } | |
261 | ||
262 | err: | |
263 | usb_unlock_device(dev); | |
264 | return ret; | |
265 | } | |
266 | ||
267 | /* | |
268 | * async list handling | |
269 | */ | |
270 | ||
271 | static struct async *alloc_async(unsigned int numisoframes) | |
272 | { | |
dd95b814 | 273 | struct async *as; |
0a1ef3b5 | 274 | |
dd95b814 | 275 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
276 | if (!as) |
277 | return NULL; | |
1da177e4 LT |
278 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
279 | if (!as->urb) { | |
280 | kfree(as); | |
281 | return NULL; | |
282 | } | |
04e482ff | 283 | return as; |
1da177e4 LT |
284 | } |
285 | ||
286 | static void free_async(struct async *as) | |
287 | { | |
2425c08b | 288 | put_pid(as->pid); |
d178bc3a | 289 | put_cred(as->cred); |
6fd19f4b JJ |
290 | kfree(as->urb->transfer_buffer); |
291 | kfree(as->urb->setup_packet); | |
1da177e4 | 292 | usb_free_urb(as->urb); |
add1aaea | 293 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 294 | kfree(as); |
1da177e4 LT |
295 | } |
296 | ||
d34d9721 | 297 | static void async_newpending(struct async *as) |
1da177e4 | 298 | { |
04e482ff GKH |
299 | struct dev_state *ps = as->ps; |
300 | unsigned long flags; | |
301 | ||
302 | spin_lock_irqsave(&ps->lock, flags); | |
303 | list_add_tail(&as->asynclist, &ps->async_pending); | |
304 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
305 | } |
306 | ||
d34d9721 | 307 | static void async_removepending(struct async *as) |
1da177e4 | 308 | { |
04e482ff GKH |
309 | struct dev_state *ps = as->ps; |
310 | unsigned long flags; | |
311 | ||
312 | spin_lock_irqsave(&ps->lock, flags); | |
313 | list_del_init(&as->asynclist); | |
314 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
315 | } |
316 | ||
d34d9721 | 317 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 318 | { |
04e482ff GKH |
319 | unsigned long flags; |
320 | struct async *as = NULL; | |
321 | ||
322 | spin_lock_irqsave(&ps->lock, flags); | |
323 | if (!list_empty(&ps->async_completed)) { | |
324 | as = list_entry(ps->async_completed.next, struct async, | |
325 | asynclist); | |
326 | list_del_init(&as->asynclist); | |
327 | } | |
328 | spin_unlock_irqrestore(&ps->lock, flags); | |
329 | return as; | |
1da177e4 LT |
330 | } |
331 | ||
d34d9721 | 332 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 333 | void __user *userurb) |
1da177e4 | 334 | { |
04e482ff GKH |
335 | unsigned long flags; |
336 | struct async *as; | |
1da177e4 | 337 | |
04e482ff | 338 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
339 | list_for_each_entry(as, &ps->async_pending, asynclist) |
340 | if (as->userurb == userurb) { | |
341 | list_del_init(&as->asynclist); | |
342 | spin_unlock_irqrestore(&ps->lock, flags); | |
343 | return as; | |
344 | } | |
04e482ff GKH |
345 | spin_unlock_irqrestore(&ps->lock, flags); |
346 | return NULL; | |
1da177e4 LT |
347 | } |
348 | ||
4c6e8971 AS |
349 | static void snoop_urb(struct usb_device *udev, |
350 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
351 | int timeout_or_status, enum snoop_when when, |
352 | unsigned char *data, unsigned data_len) | |
e639dd3f | 353 | { |
4c6e8971 AS |
354 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
355 | static const char *dirs[] = {"out", "in"}; | |
356 | int ep; | |
357 | const char *t, *d; | |
e639dd3f GKH |
358 | |
359 | if (!usbfs_snoop) | |
360 | return; | |
361 | ||
4c6e8971 AS |
362 | ep = usb_pipeendpoint(pipe); |
363 | t = types[usb_pipetype(pipe)]; | |
364 | d = dirs[!!usb_pipein(pipe)]; | |
365 | ||
366 | if (userurb) { /* Async */ | |
367 | if (when == SUBMIT) | |
368 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
369 | "length %u\n", | |
370 | userurb, ep, t, d, length); | |
371 | else | |
372 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
373 | "actual_length %u status %d\n", | |
374 | userurb, ep, t, d, length, | |
375 | timeout_or_status); | |
376 | } else { | |
377 | if (when == SUBMIT) | |
378 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
379 | "timeout %d\n", | |
380 | ep, t, d, length, timeout_or_status); | |
381 | else | |
382 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
383 | "status %d\n", | |
384 | ep, t, d, length, timeout_or_status); | |
385 | } | |
0880aef4 CF |
386 | |
387 | if (data && data_len > 0) { | |
388 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
389 | data, data_len, 1); | |
390 | } | |
e639dd3f GKH |
391 | } |
392 | ||
01c6460f AS |
393 | #define AS_CONTINUATION 1 |
394 | #define AS_UNLINK 2 | |
395 | ||
396 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
397 | __releases(ps->lock) | |
398 | __acquires(ps->lock) | |
399 | { | |
400 | struct async *as; | |
401 | ||
402 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
403 | * including the first one without AS_CONTINUATION. If such an | |
404 | * URB is encountered then a new transfer has already started so | |
405 | * the endpoint doesn't need to be disabled; otherwise it does. | |
406 | */ | |
407 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
408 | if (as->bulk_addr == bulk_addr) { | |
409 | if (as->bulk_status != AS_CONTINUATION) | |
410 | goto rescan; | |
411 | as->bulk_status = AS_UNLINK; | |
412 | as->bulk_addr = 0; | |
413 | } | |
414 | } | |
415 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
416 | ||
417 | /* Now carefully unlink all the marked pending URBs */ | |
418 | rescan: | |
419 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
420 | if (as->bulk_status == AS_UNLINK) { | |
421 | as->bulk_status = 0; /* Only once */ | |
422 | spin_unlock(&ps->lock); /* Allow completions */ | |
423 | usb_unlink_urb(as->urb); | |
424 | spin_lock(&ps->lock); | |
425 | goto rescan; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
7d12e780 | 430 | static void async_completed(struct urb *urb) |
1da177e4 | 431 | { |
04e482ff GKH |
432 | struct async *as = urb->context; |
433 | struct dev_state *ps = as->ps; | |
1da177e4 | 434 | struct siginfo sinfo; |
516a1a07 | 435 | struct pid *pid = NULL; |
516a1a07 | 436 | u32 secid = 0; |
d178bc3a | 437 | const struct cred *cred = NULL; |
516a1a07 | 438 | int signr; |
1da177e4 | 439 | |
04e482ff GKH |
440 | spin_lock(&ps->lock); |
441 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 442 | as->status = urb->status; |
516a1a07 ON |
443 | signr = as->signr; |
444 | if (signr) { | |
1da177e4 | 445 | sinfo.si_signo = as->signr; |
e015268d | 446 | sinfo.si_errno = as->status; |
1da177e4 LT |
447 | sinfo.si_code = SI_ASYNCIO; |
448 | sinfo.si_addr = as->userurb; | |
aec01c58 | 449 | pid = get_pid(as->pid); |
d178bc3a | 450 | cred = get_cred(as->cred); |
516a1a07 | 451 | secid = as->secid; |
1da177e4 | 452 | } |
e639dd3f | 453 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 454 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
0880aef4 CF |
455 | as->status, COMPLETE, |
456 | ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ? | |
457 | NULL : urb->transfer_buffer, urb->actual_length); | |
01c6460f AS |
458 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
459 | as->status != -ENOENT) | |
460 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
461 | spin_unlock(&ps->lock); |
462 | ||
aec01c58 | 463 | if (signr) { |
d178bc3a | 464 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 465 | put_pid(pid); |
d178bc3a | 466 | put_cred(cred); |
aec01c58 | 467 | } |
516a1a07 | 468 | |
e639dd3f | 469 | wake_up(&ps->wait); |
1da177e4 LT |
470 | } |
471 | ||
04e482ff | 472 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
473 | { |
474 | struct async *as; | |
475 | unsigned long flags; | |
476 | ||
477 | spin_lock_irqsave(&ps->lock, flags); | |
478 | while (!list_empty(list)) { | |
479 | as = list_entry(list->next, struct async, asynclist); | |
480 | list_del_init(&as->asynclist); | |
481 | ||
482 | /* drop the spinlock so the completion handler can run */ | |
483 | spin_unlock_irqrestore(&ps->lock, flags); | |
484 | usb_kill_urb(as->urb); | |
485 | spin_lock_irqsave(&ps->lock, flags); | |
486 | } | |
487 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
488 | } |
489 | ||
04e482ff GKH |
490 | static void destroy_async_on_interface(struct dev_state *ps, |
491 | unsigned int ifnum) | |
1da177e4 LT |
492 | { |
493 | struct list_head *p, *q, hitlist; | |
494 | unsigned long flags; | |
495 | ||
496 | INIT_LIST_HEAD(&hitlist); | |
497 | spin_lock_irqsave(&ps->lock, flags); | |
498 | list_for_each_safe(p, q, &ps->async_pending) | |
499 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
500 | list_move_tail(p, &hitlist); | |
501 | spin_unlock_irqrestore(&ps->lock, flags); | |
502 | destroy_async(ps, &hitlist); | |
503 | } | |
504 | ||
d34d9721 | 505 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 506 | { |
04e482ff | 507 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
508 | } |
509 | ||
510 | /* | |
511 | * interface claims are made only at the request of user level code, | |
512 | * which can also release them (explicitly or by closing files). | |
513 | * they're also undone when devices disconnect. | |
514 | */ | |
515 | ||
04e482ff GKH |
516 | static int driver_probe(struct usb_interface *intf, |
517 | const struct usb_device_id *id) | |
1da177e4 LT |
518 | { |
519 | return -ENODEV; | |
520 | } | |
521 | ||
522 | static void driver_disconnect(struct usb_interface *intf) | |
523 | { | |
04e482ff | 524 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
525 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
526 | ||
527 | if (!ps) | |
528 | return; | |
529 | ||
530 | /* NOTE: this relies on usbcore having canceled and completed | |
531 | * all pending I/O requests; 2.6 does that. | |
532 | */ | |
533 | ||
534 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
535 | clear_bit(ifnum, &ps->ifclaimed); | |
536 | else | |
3b6004f3 GKH |
537 | dev_warn(&intf->dev, "interface number %u out of range\n", |
538 | ifnum); | |
1da177e4 | 539 | |
04e482ff | 540 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
541 | |
542 | /* force async requests to complete */ | |
543 | destroy_async_on_interface(ps, ifnum); | |
544 | } | |
545 | ||
2e2eb83f AS |
546 | /* The following routines are merely placeholders. There is no way |
547 | * to inform a user task about suspend or resumes. | |
548 | */ | |
549 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
550 | { | |
551 | return 0; | |
552 | } | |
553 | ||
554 | static int driver_resume(struct usb_interface *intf) | |
555 | { | |
556 | return 0; | |
557 | } | |
558 | ||
1da177e4 | 559 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
560 | .name = "usbfs", |
561 | .probe = driver_probe, | |
562 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
563 | .suspend = driver_suspend, |
564 | .resume = driver_resume, | |
1da177e4 LT |
565 | }; |
566 | ||
567 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
568 | { | |
569 | struct usb_device *dev = ps->dev; | |
570 | struct usb_interface *intf; | |
571 | int err; | |
572 | ||
573 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
574 | return -EINVAL; | |
575 | /* already claimed */ | |
576 | if (test_bit(ifnum, &ps->ifclaimed)) | |
577 | return 0; | |
578 | ||
1da177e4 LT |
579 | intf = usb_ifnum_to_if(dev, ifnum); |
580 | if (!intf) | |
581 | err = -ENOENT; | |
582 | else | |
583 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
584 | if (err == 0) |
585 | set_bit(ifnum, &ps->ifclaimed); | |
586 | return err; | |
587 | } | |
588 | ||
589 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
590 | { | |
591 | struct usb_device *dev; | |
592 | struct usb_interface *intf; | |
593 | int err; | |
594 | ||
595 | err = -EINVAL; | |
596 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
597 | return err; | |
598 | dev = ps->dev; | |
1da177e4 LT |
599 | intf = usb_ifnum_to_if(dev, ifnum); |
600 | if (!intf) | |
601 | err = -ENOENT; | |
602 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
603 | usb_driver_release_interface(&usbfs_driver, intf); | |
604 | err = 0; | |
605 | } | |
1da177e4 LT |
606 | return err; |
607 | } | |
608 | ||
609 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
610 | { | |
611 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
612 | return -EHOSTUNREACH; | |
613 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
614 | return -EINVAL; | |
615 | if (test_bit(ifnum, &ps->ifclaimed)) | |
616 | return 0; | |
617 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
618 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
619 | "interface %u before use\n", task_pid_nr(current), | |
620 | current->comm, ifnum); | |
1da177e4 LT |
621 | return claimintf(ps, ifnum); |
622 | } | |
623 | ||
624 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
625 | { | |
626 | unsigned int i, j, e; | |
04e482ff | 627 | struct usb_interface *intf; |
1da177e4 LT |
628 | struct usb_host_interface *alts; |
629 | struct usb_endpoint_descriptor *endpt; | |
630 | ||
631 | if (ep & ~(USB_DIR_IN|0xf)) | |
632 | return -EINVAL; | |
633 | if (!dev->actconfig) | |
634 | return -ESRCH; | |
635 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
636 | intf = dev->actconfig->interface[i]; | |
637 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 638 | alts = &intf->altsetting[j]; |
1da177e4 LT |
639 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
640 | endpt = &alts->endpoint[e].desc; | |
641 | if (endpt->bEndpointAddress == ep) | |
642 | return alts->desc.bInterfaceNumber; | |
643 | } | |
644 | } | |
645 | } | |
04e482ff | 646 | return -ENOENT; |
1da177e4 LT |
647 | } |
648 | ||
04e482ff | 649 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
393cbb51 | 650 | unsigned int request, unsigned int index) |
1da177e4 LT |
651 | { |
652 | int ret = 0; | |
393cbb51 | 653 | struct usb_host_interface *alt_setting; |
1da177e4 | 654 | |
6da9c990 DV |
655 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
656 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 657 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
658 | return -EHOSTUNREACH; |
659 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
660 | return 0; | |
661 | ||
393cbb51 MD |
662 | /* |
663 | * check for the special corner case 'get_device_id' in the printer | |
664 | * class specification, where wIndex is (interface << 8 | altsetting) | |
665 | * instead of just interface | |
666 | */ | |
667 | if (requesttype == 0xa1 && request == 0) { | |
668 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
669 | index >> 8, index & 0xff); | |
670 | if (alt_setting | |
671 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
672 | index >>= 8; | |
673 | } | |
674 | ||
1da177e4 LT |
675 | index &= 0xff; |
676 | switch (requesttype & USB_RECIP_MASK) { | |
677 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
678 | ret = findintfep(ps->dev, index); |
679 | if (ret >= 0) | |
1da177e4 LT |
680 | ret = checkintf(ps, ret); |
681 | break; | |
682 | ||
683 | case USB_RECIP_INTERFACE: | |
684 | ret = checkintf(ps, index); | |
685 | break; | |
686 | } | |
687 | return ret; | |
688 | } | |
689 | ||
61ad04a8 | 690 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 691 | { |
a80d5ff0 | 692 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 693 | } |
4592bf5a | 694 | |
61ad04a8 | 695 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
696 | { |
697 | struct device *dev; | |
698 | ||
a80d5ff0 DH |
699 | dev = bus_find_device(&usb_bus_type, NULL, |
700 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
701 | if (!dev) |
702 | return NULL; | |
9f8b17e6 KS |
703 | return container_of(dev, struct usb_device, dev); |
704 | } | |
4592bf5a | 705 | |
1da177e4 LT |
706 | /* |
707 | * file operations | |
708 | */ | |
709 | static int usbdev_open(struct inode *inode, struct file *file) | |
710 | { | |
fbf82fd2 | 711 | struct usb_device *dev = NULL; |
1da177e4 LT |
712 | struct dev_state *ps; |
713 | int ret; | |
714 | ||
1da177e4 | 715 | ret = -ENOMEM; |
04e482ff GKH |
716 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
717 | if (!ps) | |
62e299e6 | 718 | goto out_free_ps; |
1da177e4 | 719 | |
01105a24 | 720 | ret = -ENODEV; |
61ad04a8 | 721 | |
62e299e6 AS |
722 | /* Protect against simultaneous removal or release */ |
723 | mutex_lock(&usbfs_mutex); | |
724 | ||
9f8b17e6 | 725 | /* usbdev device-node */ |
fbf82fd2 | 726 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 727 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 728 | |
9f8b17e6 KS |
729 | #ifdef CONFIG_USB_DEVICEFS |
730 | /* procfs file */ | |
d64aac36 | 731 | if (!dev) { |
8e18e294 | 732 | dev = inode->i_private; |
d64aac36 AS |
733 | if (dev && dev->usbfs_dentry && |
734 | dev->usbfs_dentry->d_inode == inode) | |
735 | usb_get_dev(dev); | |
736 | else | |
737 | dev = NULL; | |
738 | } | |
9f8b17e6 | 739 | #endif |
62e299e6 AS |
740 | mutex_unlock(&usbfs_mutex); |
741 | ||
742 | if (!dev) | |
743 | goto out_free_ps; | |
744 | ||
745 | usb_lock_device(dev); | |
746 | if (dev->state == USB_STATE_NOTATTACHED) | |
747 | goto out_unlock_device; | |
748 | ||
94fcda1f | 749 | ret = usb_autoresume_device(dev); |
01d883d4 | 750 | if (ret) |
62e299e6 | 751 | goto out_unlock_device; |
01d883d4 | 752 | |
1da177e4 LT |
753 | ps->dev = dev; |
754 | ps->file = file; | |
755 | spin_lock_init(&ps->lock); | |
316547fd | 756 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
757 | INIT_LIST_HEAD(&ps->async_pending); |
758 | INIT_LIST_HEAD(&ps->async_completed); | |
759 | init_waitqueue_head(&ps->wait); | |
760 | ps->discsignr = 0; | |
2425c08b | 761 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 762 | ps->cred = get_current_cred(); |
1da177e4 LT |
763 | ps->disccontext = NULL; |
764 | ps->ifclaimed = 0; | |
7a01955f | 765 | security_task_getsecid(current, &ps->secid); |
527660a8 | 766 | smp_wmb(); |
1da177e4 LT |
767 | list_add_tail(&ps->list, &dev->filelist); |
768 | file->private_data = ps; | |
62e299e6 | 769 | usb_unlock_device(dev); |
2da41d5f AS |
770 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
771 | current->comm); | |
62e299e6 AS |
772 | return ret; |
773 | ||
774 | out_unlock_device: | |
775 | usb_unlock_device(dev); | |
776 | usb_put_dev(dev); | |
777 | out_free_ps: | |
778 | kfree(ps); | |
4a2a8a2c | 779 | return ret; |
1da177e4 LT |
780 | } |
781 | ||
782 | static int usbdev_release(struct inode *inode, struct file *file) | |
783 | { | |
ec17cf1c | 784 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
785 | struct usb_device *dev = ps->dev; |
786 | unsigned int ifnum; | |
6ff10464 | 787 | struct async *as; |
1da177e4 LT |
788 | |
789 | usb_lock_device(dev); | |
7cbe5dca | 790 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 791 | |
1da177e4 | 792 | list_del_init(&ps->list); |
4a2a8a2c | 793 | |
1da177e4 LT |
794 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
795 | ifnum++) { | |
796 | if (test_bit(ifnum, &ps->ifclaimed)) | |
797 | releaseintf(ps, ifnum); | |
798 | } | |
799 | destroy_all_async(ps); | |
94fcda1f | 800 | usb_autosuspend_device(dev); |
1da177e4 LT |
801 | usb_unlock_device(dev); |
802 | usb_put_dev(dev); | |
2425c08b | 803 | put_pid(ps->disc_pid); |
d178bc3a | 804 | put_cred(ps->cred); |
6ff10464 AS |
805 | |
806 | as = async_getcompleted(ps); | |
807 | while (as) { | |
808 | free_async(as); | |
809 | as = async_getcompleted(ps); | |
810 | } | |
1da177e4 | 811 | kfree(ps); |
4a2a8a2c | 812 | return 0; |
1da177e4 LT |
813 | } |
814 | ||
815 | static int proc_control(struct dev_state *ps, void __user *arg) | |
816 | { | |
817 | struct usb_device *dev = ps->dev; | |
818 | struct usbdevfs_ctrltransfer ctrl; | |
819 | unsigned int tmo; | |
820 | unsigned char *tbuf; | |
ff66e3ce | 821 | unsigned wLength; |
4c6e8971 | 822 | int i, pipe, ret; |
1da177e4 LT |
823 | |
824 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
825 | return -EFAULT; | |
393cbb51 MD |
826 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
827 | ctrl.wIndex); | |
04e482ff | 828 | if (ret) |
1da177e4 | 829 | return ret; |
ff66e3ce AM |
830 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
831 | if (wLength > PAGE_SIZE) | |
1da177e4 | 832 | return -EINVAL; |
add1aaea AS |
833 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
834 | sizeof(struct usb_ctrlrequest)); | |
835 | if (ret) | |
836 | return ret; | |
04e482ff | 837 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
838 | if (!tbuf) { |
839 | ret = -ENOMEM; | |
840 | goto done; | |
841 | } | |
1da177e4 | 842 | tmo = ctrl.timeout; |
0880aef4 CF |
843 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
844 | "bRequest=%02x wValue=%04x " | |
845 | "wIndex=%04x wLength=%04x\n", | |
846 | ctrl.bRequestType, ctrl.bRequest, | |
847 | __le16_to_cpup(&ctrl.wValue), | |
848 | __le16_to_cpup(&ctrl.wIndex), | |
849 | __le16_to_cpup(&ctrl.wLength)); | |
1da177e4 | 850 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
851 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
852 | ctrl.wLength)) { | |
52fb743d AS |
853 | ret = -EINVAL; |
854 | goto done; | |
1da177e4 | 855 | } |
4c6e8971 | 856 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 857 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
858 | |
859 | usb_unlock_device(dev); | |
4c6e8971 | 860 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
861 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
862 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 863 | usb_lock_device(dev); |
0880aef4 | 864 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 865 | tbuf, max(i, 0)); |
1da177e4 | 866 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 867 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
868 | ret = -EFAULT; |
869 | goto done; | |
1da177e4 LT |
870 | } |
871 | } | |
872 | } else { | |
873 | if (ctrl.wLength) { | |
874 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
875 | ret = -EFAULT; |
876 | goto done; | |
1da177e4 LT |
877 | } |
878 | } | |
4c6e8971 | 879 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
880 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
881 | tbuf, ctrl.wLength); | |
4c6e8971 | 882 | |
1da177e4 | 883 | usb_unlock_device(dev); |
04e482ff GKH |
884 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
885 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
886 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 887 | usb_lock_device(dev); |
0880aef4 | 888 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 889 | } |
04e482ff | 890 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
891 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
892 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
893 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
894 | ctrl.wLength, i); | |
895 | } | |
52fb743d AS |
896 | ret = i; |
897 | done: | |
898 | free_page((unsigned long) tbuf); | |
add1aaea AS |
899 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
900 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 901 | return ret; |
1da177e4 LT |
902 | } |
903 | ||
904 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
905 | { | |
906 | struct usb_device *dev = ps->dev; | |
907 | struct usbdevfs_bulktransfer bulk; | |
908 | unsigned int tmo, len1, pipe; | |
909 | int len2; | |
910 | unsigned char *tbuf; | |
4c6e8971 | 911 | int i, ret; |
1da177e4 LT |
912 | |
913 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
914 | return -EFAULT; | |
04e482ff GKH |
915 | ret = findintfep(ps->dev, bulk.ep); |
916 | if (ret < 0) | |
1da177e4 | 917 | return ret; |
04e482ff GKH |
918 | ret = checkintf(ps, ret); |
919 | if (ret) | |
1da177e4 LT |
920 | return ret; |
921 | if (bulk.ep & USB_DIR_IN) | |
922 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
923 | else | |
924 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
925 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
926 | return -EINVAL; | |
927 | len1 = bulk.len; | |
3f5eb8d5 | 928 | if (len1 >= USBFS_XFER_MAX) |
1da177e4 | 929 | return -EINVAL; |
add1aaea AS |
930 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
931 | if (ret) | |
932 | return ret; | |
933 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) { | |
934 | ret = -ENOMEM; | |
935 | goto done; | |
936 | } | |
1da177e4 LT |
937 | tmo = bulk.timeout; |
938 | if (bulk.ep & 0x80) { | |
939 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
940 | ret = -EINVAL; |
941 | goto done; | |
1da177e4 | 942 | } |
0880aef4 | 943 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 944 | |
1da177e4 LT |
945 | usb_unlock_device(dev); |
946 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
947 | usb_lock_device(dev); | |
0880aef4 | 948 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 949 | |
1da177e4 LT |
950 | if (!i && len2) { |
951 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
952 | ret = -EFAULT; |
953 | goto done; | |
1da177e4 LT |
954 | } |
955 | } | |
956 | } else { | |
957 | if (len1) { | |
958 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
959 | ret = -EFAULT; |
960 | goto done; | |
1da177e4 LT |
961 | } |
962 | } | |
0880aef4 | 963 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 964 | |
1da177e4 LT |
965 | usb_unlock_device(dev); |
966 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
967 | usb_lock_device(dev); | |
0880aef4 | 968 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 969 | } |
52fb743d AS |
970 | ret = (i < 0 ? i : len2); |
971 | done: | |
1da177e4 | 972 | kfree(tbuf); |
add1aaea | 973 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 974 | return ret; |
1da177e4 LT |
975 | } |
976 | ||
977 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
978 | { | |
979 | unsigned int ep; | |
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 | 989 | return ret; |
3444b26a | 990 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
991 | return 0; |
992 | } | |
993 | ||
994 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
995 | { | |
996 | unsigned int ep; | |
997 | int pipe; | |
998 | int ret; | |
999 | ||
1000 | if (get_user(ep, (unsigned int __user *)arg)) | |
1001 | return -EFAULT; | |
04e482ff GKH |
1002 | ret = findintfep(ps->dev, ep); |
1003 | if (ret < 0) | |
1da177e4 | 1004 | return ret; |
04e482ff GKH |
1005 | ret = checkintf(ps, ret); |
1006 | if (ret) | |
1da177e4 LT |
1007 | return ret; |
1008 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
1009 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1010 | else | |
1011 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1012 | |
1013 | return usb_clear_halt(ps->dev, pipe); | |
1014 | } | |
1da177e4 LT |
1015 | |
1016 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
1017 | { | |
1018 | struct usbdevfs_getdriver gd; | |
1019 | struct usb_interface *intf; | |
1020 | int ret; | |
1021 | ||
1022 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1023 | return -EFAULT; | |
1da177e4 LT |
1024 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1025 | if (!intf || !intf->dev.driver) | |
1026 | ret = -ENODATA; | |
1027 | else { | |
1028 | strncpy(gd.driver, intf->dev.driver->name, | |
1029 | sizeof(gd.driver)); | |
1030 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1031 | } | |
1da177e4 LT |
1032 | return ret; |
1033 | } | |
1034 | ||
1035 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
1036 | { | |
886ccd45 VK |
1037 | struct usbdevfs_connectinfo ci = { |
1038 | .devnum = ps->dev->devnum, | |
1039 | .slow = ps->dev->speed == USB_SPEED_LOW | |
1040 | }; | |
1da177e4 | 1041 | |
1da177e4 LT |
1042 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1043 | return -EFAULT; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int proc_resetdevice(struct dev_state *ps) | |
1048 | { | |
742120c6 | 1049 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1050 | } |
1051 | ||
1052 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
1053 | { | |
1054 | struct usbdevfs_setinterface setintf; | |
1055 | int ret; | |
1056 | ||
1057 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1058 | return -EFAULT; | |
1059 | if ((ret = checkintf(ps, setintf.interface))) | |
1060 | return ret; | |
1061 | return usb_set_interface(ps->dev, setintf.interface, | |
1062 | setintf.altsetting); | |
1063 | } | |
1064 | ||
1065 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
1066 | { | |
3f141e2a | 1067 | int u; |
1da177e4 | 1068 | int status = 0; |
04e482ff | 1069 | struct usb_host_config *actconfig; |
1da177e4 | 1070 | |
3f141e2a | 1071 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1072 | return -EFAULT; |
1073 | ||
04e482ff GKH |
1074 | actconfig = ps->dev->actconfig; |
1075 | ||
1076 | /* Don't touch the device if any interfaces are claimed. | |
1077 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1078 | * an interface is claimed by usbfs it could easily deadlock. |
1079 | */ | |
04e482ff GKH |
1080 | if (actconfig) { |
1081 | int i; | |
1082 | ||
1083 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1084 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1085 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1086 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1087 | "while '%s' sets config #%d\n", |
1088 | actconfig->interface[i] | |
1089 | ->cur_altsetting | |
1090 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1091 | actconfig->interface[i] |
1092 | ->dev.driver->name, | |
1da177e4 | 1093 | current->comm, u); |
04e482ff | 1094 | status = -EBUSY; |
1da177e4 | 1095 | break; |
1da177e4 | 1096 | } |
04e482ff GKH |
1097 | } |
1098 | } | |
1da177e4 LT |
1099 | |
1100 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1101 | * so avoid usb_set_configuration()'s kick to sysfs | |
1102 | */ | |
1103 | if (status == 0) { | |
1104 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1105 | status = usb_reset_configuration(ps->dev); | |
1106 | else | |
1107 | status = usb_set_configuration(ps->dev, u); | |
1108 | } | |
1109 | ||
1110 | return status; | |
1111 | } | |
1112 | ||
1da177e4 | 1113 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1114 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1115 | void __user *arg) | |
1da177e4 LT |
1116 | { |
1117 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1118 | struct usb_host_endpoint *ep; | |
52fb743d | 1119 | struct async *as = NULL; |
1da177e4 LT |
1120 | struct usb_ctrlrequest *dr = NULL; |
1121 | unsigned int u, totlen, isofrmlen; | |
97b9eb91 | 1122 | int ret, ifnum = -1; |
93cf9b90 | 1123 | int is_in; |
1da177e4 | 1124 | |
14722ef4 AS |
1125 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1126 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1127 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1128 | USBDEVFS_URB_NO_FSBR | |
1129 | USBDEVFS_URB_ZERO_PACKET | | |
1130 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1131 | return -EINVAL; |
9180135b | 1132 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1133 | return -EINVAL; |
04e482ff GKH |
1134 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1135 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1136 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1137 | if (ifnum < 0) | |
1da177e4 | 1138 | return ifnum; |
04e482ff GKH |
1139 | ret = checkintf(ps, ifnum); |
1140 | if (ret) | |
1da177e4 LT |
1141 | return ret; |
1142 | } | |
93cf9b90 AS |
1143 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1144 | is_in = 1; | |
1145 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1146 | } else { | |
1147 | is_in = 0; | |
1148 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1149 | } | |
1da177e4 LT |
1150 | if (!ep) |
1151 | return -ENOENT; | |
add1aaea AS |
1152 | |
1153 | u = 0; | |
1da177e4 LT |
1154 | switch(uurb->type) { |
1155 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1156 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1157 | return -EINVAL; |
add1aaea AS |
1158 | /* min 8 byte setup packet */ |
1159 | if (uurb->buffer_length < 8) | |
1da177e4 | 1160 | return -EINVAL; |
04e482ff GKH |
1161 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1162 | if (!dr) | |
1da177e4 LT |
1163 | return -ENOMEM; |
1164 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1165 | ret = -EFAULT; |
1166 | goto error; | |
1da177e4 LT |
1167 | } |
1168 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1169 | ret = -EINVAL; |
1170 | goto error; | |
1da177e4 | 1171 | } |
393cbb51 | 1172 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1173 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1174 | if (ret) |
1175 | goto error; | |
1da177e4 LT |
1176 | uurb->number_of_packets = 0; |
1177 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1178 | uurb->buffer += 8; | |
93cf9b90 AS |
1179 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1180 | is_in = 1; | |
1181 | uurb->endpoint |= USB_DIR_IN; | |
1182 | } else { | |
1183 | is_in = 0; | |
1184 | uurb->endpoint &= ~USB_DIR_IN; | |
1185 | } | |
0880aef4 CF |
1186 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1187 | "bRequest=%02x wValue=%04x " | |
1188 | "wIndex=%04x wLength=%04x\n", | |
1189 | dr->bRequestType, dr->bRequest, | |
1190 | __le16_to_cpup(&dr->wValue), | |
1191 | __le16_to_cpup(&dr->wIndex), | |
1192 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1193 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1194 | break; |
1195 | ||
1196 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1197 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1198 | case USB_ENDPOINT_XFER_CONTROL: |
1199 | case USB_ENDPOINT_XFER_ISOC: | |
1200 | return -EINVAL; | |
f661c6f8 AS |
1201 | case USB_ENDPOINT_XFER_INT: |
1202 | /* allow single-shot interrupt transfers */ | |
1203 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1204 | goto interrupt_urb; | |
1da177e4 LT |
1205 | } |
1206 | uurb->number_of_packets = 0; | |
1da177e4 LT |
1207 | break; |
1208 | ||
f661c6f8 AS |
1209 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1210 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1211 | return -EINVAL; | |
1212 | interrupt_urb: | |
1213 | uurb->number_of_packets = 0; | |
f661c6f8 AS |
1214 | break; |
1215 | ||
1da177e4 LT |
1216 | case USBDEVFS_URB_TYPE_ISO: |
1217 | /* arbitrary limit */ | |
04e482ff GKH |
1218 | if (uurb->number_of_packets < 1 || |
1219 | uurb->number_of_packets > 128) | |
1da177e4 | 1220 | return -EINVAL; |
93cf9b90 | 1221 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1222 | return -EINVAL; |
04e482ff GKH |
1223 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1224 | uurb->number_of_packets; | |
1da177e4 LT |
1225 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1226 | return -ENOMEM; | |
1227 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
52fb743d AS |
1228 | ret = -EFAULT; |
1229 | goto error; | |
1da177e4 LT |
1230 | } |
1231 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1232 | /* arbitrary limit, |
1233 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1234 | if (isopkt[u].length > 8192) { |
52fb743d AS |
1235 | ret = -EINVAL; |
1236 | goto error; | |
1da177e4 LT |
1237 | } |
1238 | totlen += isopkt[u].length; | |
1239 | } | |
add1aaea | 1240 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1241 | uurb->buffer_length = totlen; |
1242 | break; | |
1243 | ||
1da177e4 LT |
1244 | default: |
1245 | return -EINVAL; | |
1246 | } | |
add1aaea | 1247 | |
3f5eb8d5 | 1248 | if (uurb->buffer_length >= USBFS_XFER_MAX) { |
add1aaea AS |
1249 | ret = -EINVAL; |
1250 | goto error; | |
1251 | } | |
9180135b AS |
1252 | if (uurb->buffer_length > 0 && |
1253 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1254 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1255 | ret = -EFAULT; |
1256 | goto error; | |
1da177e4 | 1257 | } |
9180135b AS |
1258 | as = alloc_async(uurb->number_of_packets); |
1259 | if (!as) { | |
52fb743d AS |
1260 | ret = -ENOMEM; |
1261 | goto error; | |
1da177e4 | 1262 | } |
add1aaea AS |
1263 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length; |
1264 | ret = usbfs_increase_memory_usage(u); | |
1265 | if (ret) | |
1266 | goto error; | |
1267 | as->mem_usage = u; | |
1268 | ||
9180135b AS |
1269 | if (uurb->buffer_length > 0) { |
1270 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1271 | GFP_KERNEL); | |
1272 | if (!as->urb->transfer_buffer) { | |
52fb743d AS |
1273 | ret = -ENOMEM; |
1274 | goto error; | |
9180135b | 1275 | } |
7152b592 AS |
1276 | /* Isochronous input data may end up being discontiguous |
1277 | * if some of the packets are short. Clear the buffer so | |
1278 | * that the gaps don't leak kernel data to userspace. | |
1279 | */ | |
1280 | if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1281 | memset(as->urb->transfer_buffer, 0, | |
1282 | uurb->buffer_length); | |
9180135b | 1283 | } |
04e482ff GKH |
1284 | as->urb->dev = ps->dev; |
1285 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1286 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1287 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1288 | |
1289 | /* This tedious sequence is necessary because the URB_* flags | |
1290 | * are internal to the kernel and subject to change, whereas | |
1291 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1292 | */ | |
1293 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1294 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1295 | u |= URB_ISO_ASAP; | |
1296 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1297 | u |= URB_SHORT_NOT_OK; | |
1298 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1299 | u |= URB_NO_FSBR; | |
1300 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1301 | u |= URB_ZERO_PACKET; | |
1302 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1303 | u |= URB_NO_INTERRUPT; | |
1304 | as->urb->transfer_flags = u; | |
1305 | ||
1da177e4 | 1306 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1307 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1308 | dr = NULL; |
1da177e4 LT |
1309 | as->urb->start_frame = uurb->start_frame; |
1310 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1311 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1312 | ps->dev->speed == USB_SPEED_HIGH) | |
1313 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1314 | else | |
1315 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1316 | as->urb->context = as; |
1317 | as->urb->complete = async_completed; | |
1da177e4 LT |
1318 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1319 | as->urb->iso_frame_desc[u].offset = totlen; | |
1320 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1321 | totlen += isopkt[u].length; | |
1322 | } | |
6fd19f4b | 1323 | kfree(isopkt); |
52fb743d | 1324 | isopkt = NULL; |
1da177e4 | 1325 | as->ps = ps; |
04e482ff | 1326 | as->userurb = arg; |
9180135b | 1327 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1328 | as->userbuffer = uurb->buffer; |
1329 | else | |
1330 | as->userbuffer = NULL; | |
1331 | as->signr = uurb->signr; | |
1332 | as->ifnum = ifnum; | |
2425c08b | 1333 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1334 | as->cred = get_current_cred(); |
7a01955f | 1335 | security_task_getsecid(current, &as->secid); |
9180135b | 1336 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1337 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1338 | uurb->buffer_length)) { |
52fb743d AS |
1339 | ret = -EFAULT; |
1340 | goto error; | |
1da177e4 LT |
1341 | } |
1342 | } | |
4c6e8971 | 1343 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 CF |
1344 | as->urb->transfer_buffer_length, 0, SUBMIT, |
1345 | is_in ? NULL : as->urb->transfer_buffer, | |
1346 | uurb->buffer_length); | |
04e482ff | 1347 | async_newpending(as); |
01c6460f AS |
1348 | |
1349 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1350 | spin_lock_irq(&ps->lock); | |
1351 | ||
1352 | /* Not exactly the endpoint address; the direction bit is | |
1353 | * shifted to the 0x10 position so that the value will be | |
1354 | * between 0 and 31. | |
1355 | */ | |
1356 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1357 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1358 | >> 3); | |
1359 | ||
1360 | /* If this bulk URB is the start of a new transfer, re-enable | |
1361 | * the endpoint. Otherwise mark it as a continuation URB. | |
1362 | */ | |
1363 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1364 | as->bulk_status = AS_CONTINUATION; | |
1365 | else | |
1366 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1367 | ||
1368 | /* Don't accept continuation URBs if the endpoint is | |
1369 | * disabled because of an earlier error. | |
1370 | */ | |
1371 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1372 | ret = -EREMOTEIO; | |
1373 | else | |
1374 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1375 | spin_unlock_irq(&ps->lock); | |
1376 | } else { | |
1377 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1378 | } | |
1379 | ||
1380 | if (ret) { | |
04e482ff GKH |
1381 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1382 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1383 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1384 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1385 | async_removepending(as); |
52fb743d | 1386 | goto error; |
04e482ff GKH |
1387 | } |
1388 | return 0; | |
52fb743d AS |
1389 | |
1390 | error: | |
1391 | kfree(isopkt); | |
1392 | kfree(dr); | |
1393 | if (as) | |
1394 | free_async(as); | |
1395 | return ret; | |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1399 | { | |
1400 | struct usbdevfs_urb uurb; | |
1401 | ||
1402 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1403 | return -EFAULT; | |
1404 | ||
04e482ff GKH |
1405 | return proc_do_submiturb(ps, &uurb, |
1406 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1407 | arg); | |
1da177e4 LT |
1408 | } |
1409 | ||
1410 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1411 | { | |
1412 | struct async *as; | |
1413 | ||
1414 | as = async_getpending(ps, arg); | |
1415 | if (!as) | |
1416 | return -EINVAL; | |
1417 | usb_kill_urb(as->urb); | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | static int processcompl(struct async *as, void __user * __user *arg) | |
1422 | { | |
1423 | struct urb *urb = as->urb; | |
1424 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1425 | void __user *addr = as->userurb; | |
1426 | unsigned int i; | |
1427 | ||
7152b592 AS |
1428 | if (as->userbuffer && urb->actual_length) { |
1429 | if (urb->number_of_packets > 0) /* Isochronous */ | |
1430 | i = urb->transfer_buffer_length; | |
1431 | else /* Non-Isoc */ | |
1432 | i = urb->actual_length; | |
1433 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, i)) | |
d794a021 | 1434 | goto err_out; |
7152b592 | 1435 | } |
e015268d | 1436 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1437 | goto err_out; |
1da177e4 | 1438 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1439 | goto err_out; |
1da177e4 | 1440 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1441 | goto err_out; |
1da177e4 | 1442 | |
93cf9b90 | 1443 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1444 | for (i = 0; i < urb->number_of_packets; i++) { |
1445 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1446 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1447 | goto err_out; |
668a9541 CL |
1448 | if (put_user(urb->iso_frame_desc[i].status, |
1449 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1450 | goto err_out; |
668a9541 | 1451 | } |
1da177e4 LT |
1452 | } |
1453 | ||
1da177e4 LT |
1454 | if (put_user(addr, (void __user * __user *)arg)) |
1455 | return -EFAULT; | |
1456 | return 0; | |
d794a021 ON |
1457 | |
1458 | err_out: | |
d794a021 | 1459 | return -EFAULT; |
1da177e4 LT |
1460 | } |
1461 | ||
04e482ff | 1462 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1463 | { |
04e482ff | 1464 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1465 | struct async *as = NULL; |
1466 | struct usb_device *dev = ps->dev; | |
1467 | ||
1468 | add_wait_queue(&ps->wait, &wait); | |
1469 | for (;;) { | |
1470 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1471 | as = async_getcompleted(ps); |
1472 | if (as) | |
1da177e4 LT |
1473 | break; |
1474 | if (signal_pending(current)) | |
1475 | break; | |
1476 | usb_unlock_device(dev); | |
1477 | schedule(); | |
1478 | usb_lock_device(dev); | |
1479 | } | |
1480 | remove_wait_queue(&ps->wait, &wait); | |
1481 | set_current_state(TASK_RUNNING); | |
1482 | return as; | |
1483 | } | |
1484 | ||
1485 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1486 | { | |
1487 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1488 | if (as) { |
1489 | int retval = processcompl(as, (void __user * __user *)arg); | |
1490 | free_async(as); | |
1491 | return retval; | |
1492 | } | |
1da177e4 LT |
1493 | if (signal_pending(current)) |
1494 | return -EINTR; | |
1495 | return -EIO; | |
1496 | } | |
1497 | ||
1498 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1499 | { | |
ddeee0b2 | 1500 | int retval; |
1da177e4 LT |
1501 | struct async *as; |
1502 | ||
ddeee0b2 LT |
1503 | as = async_getcompleted(ps); |
1504 | retval = -EAGAIN; | |
1505 | if (as) { | |
1506 | retval = processcompl(as, (void __user * __user *)arg); | |
1507 | free_async(as); | |
1508 | } | |
1509 | return retval; | |
1da177e4 LT |
1510 | } |
1511 | ||
1512 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1513 | static int proc_control_compat(struct dev_state *ps, |
1514 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1515 | { | |
1516 | struct usbdevfs_ctrltransfer __user *p; | |
1517 | __u32 udata; | |
1518 | p = compat_alloc_user_space(sizeof(*p)); | |
1519 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1520 | get_user(udata, &p32->data) || | |
1521 | put_user(compat_ptr(udata), &p->data)) | |
1522 | return -EFAULT; | |
1523 | return proc_control(ps, p); | |
1524 | } | |
1525 | ||
1526 | static int proc_bulk_compat(struct dev_state *ps, | |
1527 | struct usbdevfs_bulktransfer32 __user *p32) | |
1528 | { | |
1529 | struct usbdevfs_bulktransfer __user *p; | |
1530 | compat_uint_t n; | |
1531 | compat_caddr_t addr; | |
1532 | ||
1533 | p = compat_alloc_user_space(sizeof(*p)); | |
1534 | ||
1535 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1536 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1537 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1538 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1539 | return -EFAULT; | |
1540 | ||
1541 | return proc_bulk(ps, p); | |
1542 | } | |
1543 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1544 | { | |
1545 | struct usbdevfs_disconnectsignal32 ds; | |
1546 | ||
1547 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1548 | return -EFAULT; | |
1549 | ps->discsignr = ds.signr; | |
1550 | ps->disccontext = compat_ptr(ds.context); | |
1551 | return 0; | |
1552 | } | |
1da177e4 LT |
1553 | |
1554 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1555 | struct usbdevfs_urb32 __user *uurb) | |
1556 | { | |
1557 | __u32 uptr; | |
18753ebc MB |
1558 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1559 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1560 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1561 | __get_user(kurb->status, &uurb->status) || | |
1562 | __get_user(kurb->flags, &uurb->flags) || | |
1563 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1564 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1565 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1566 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1567 | __get_user(kurb->error_count, &uurb->error_count) || | |
1568 | __get_user(kurb->signr, &uurb->signr)) | |
1569 | return -EFAULT; | |
1570 | ||
1571 | if (__get_user(uptr, &uurb->buffer)) | |
1572 | return -EFAULT; | |
1573 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1574 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1575 | return -EFAULT; |
1576 | kurb->usercontext = compat_ptr(uptr); | |
1577 | ||
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1582 | { | |
1583 | struct usbdevfs_urb uurb; | |
1584 | ||
04e482ff | 1585 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1586 | return -EFAULT; |
1587 | ||
04e482ff GKH |
1588 | return proc_do_submiturb(ps, &uurb, |
1589 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1590 | arg); | |
1da177e4 LT |
1591 | } |
1592 | ||
1593 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1594 | { | |
1595 | struct urb *urb = as->urb; | |
1596 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1597 | void __user *addr = as->userurb; | |
1598 | unsigned int i; | |
1599 | ||
d4a4683c | 1600 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1601 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1602 | urb->actual_length)) |
1da177e4 | 1603 | return -EFAULT; |
e015268d | 1604 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1605 | return -EFAULT; |
1606 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1607 | return -EFAULT; | |
1608 | if (put_user(urb->error_count, &userurb->error_count)) | |
1609 | return -EFAULT; | |
1610 | ||
93cf9b90 | 1611 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1612 | for (i = 0; i < urb->number_of_packets; i++) { |
1613 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1614 | &userurb->iso_frame_desc[i].actual_length)) | |
1615 | return -EFAULT; | |
1616 | if (put_user(urb->iso_frame_desc[i].status, | |
1617 | &userurb->iso_frame_desc[i].status)) | |
1618 | return -EFAULT; | |
1619 | } | |
1da177e4 LT |
1620 | } |
1621 | ||
c714de5d | 1622 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1623 | return -EFAULT; |
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1628 | { | |
1629 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1630 | if (as) { |
1631 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1632 | free_async(as); | |
1633 | return retval; | |
1634 | } | |
1da177e4 LT |
1635 | if (signal_pending(current)) |
1636 | return -EINTR; | |
1637 | return -EIO; | |
1638 | } | |
1639 | ||
1640 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1641 | { | |
ddeee0b2 | 1642 | int retval; |
1da177e4 LT |
1643 | struct async *as; |
1644 | ||
ddeee0b2 LT |
1645 | retval = -EAGAIN; |
1646 | as = async_getcompleted(ps); | |
1647 | if (as) { | |
1648 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1649 | free_async(as); | |
1650 | } | |
1651 | return retval; | |
1da177e4 LT |
1652 | } |
1653 | ||
637e8a60 | 1654 | |
1da177e4 LT |
1655 | #endif |
1656 | ||
1657 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1658 | { | |
1659 | struct usbdevfs_disconnectsignal ds; | |
1660 | ||
1661 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1662 | return -EFAULT; | |
1da177e4 LT |
1663 | ps->discsignr = ds.signr; |
1664 | ps->disccontext = ds.context; | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1669 | { | |
1670 | unsigned int ifnum; | |
1671 | ||
1672 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1673 | return -EFAULT; | |
1674 | return claimintf(ps, ifnum); | |
1675 | } | |
1676 | ||
1677 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1678 | { | |
1679 | unsigned int ifnum; | |
1680 | int ret; | |
1681 | ||
1682 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1683 | return -EFAULT; | |
1684 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1685 | return ret; | |
1686 | destroy_async_on_interface (ps, ifnum); | |
1687 | return 0; | |
1688 | } | |
1689 | ||
c36fc889 | 1690 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1691 | { |
1da177e4 LT |
1692 | int size; |
1693 | void *buf = NULL; | |
1694 | int retval = 0; | |
1695 | struct usb_interface *intf = NULL; | |
1696 | struct usb_driver *driver = NULL; | |
1da177e4 | 1697 | |
c36fc889 | 1698 | /* alloc buffer */ |
04e482ff GKH |
1699 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1700 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1701 | return -ENOMEM; |
c36fc889 | 1702 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1703 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1704 | kfree(buf); |
1da177e4 LT |
1705 | return -EFAULT; |
1706 | } | |
1707 | } else { | |
04e482ff | 1708 | memset(buf, 0, size); |
1da177e4 LT |
1709 | } |
1710 | } | |
1711 | ||
349710c3 | 1712 | if (!connected(ps)) { |
6fd19f4b | 1713 | kfree(buf); |
1da177e4 LT |
1714 | return -ENODEV; |
1715 | } | |
1716 | ||
1717 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1718 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1719 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1720 | retval = -EINVAL; | |
c36fc889 | 1721 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1722 | |
1723 | /* disconnect kernel driver from interface */ | |
1724 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1725 | if (intf->dev.driver) { |
1726 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1727 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1728 | usb_driver_release_interface(driver, intf); |
1729 | } else | |
1730 | retval = -ENODATA; | |
1da177e4 LT |
1731 | break; |
1732 | ||
1733 | /* let kernel drivers try to (re)bind to the interface */ | |
1734 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1735 | if (!intf->dev.driver) |
1736 | retval = device_attach(&intf->dev); | |
1737 | else | |
1738 | retval = -EBUSY; | |
1da177e4 LT |
1739 | break; |
1740 | ||
1741 | /* talk directly to the interface's driver */ | |
1742 | default: | |
1da177e4 LT |
1743 | if (intf->dev.driver) |
1744 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 1745 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
1746 | retval = -ENOTTY; |
1747 | } else { | |
c532b29a | 1748 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1749 | if (retval == -ENOIOCTLCMD) |
1750 | retval = -ENOTTY; | |
1751 | } | |
1da177e4 LT |
1752 | } |
1753 | ||
1754 | /* cleanup and return */ | |
1755 | if (retval >= 0 | |
04e482ff | 1756 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1757 | && size > 0 |
04e482ff | 1758 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1759 | retval = -EFAULT; |
6fd19f4b JJ |
1760 | |
1761 | kfree(buf); | |
1da177e4 LT |
1762 | return retval; |
1763 | } | |
1764 | ||
c36fc889 PZ |
1765 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1766 | { | |
1767 | struct usbdevfs_ioctl ctrl; | |
1768 | ||
04e482ff | 1769 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1770 | return -EFAULT; |
1771 | return proc_ioctl(ps, &ctrl); | |
1772 | } | |
1773 | ||
1774 | #ifdef CONFIG_COMPAT | |
777da590 | 1775 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1776 | { |
1777 | struct usbdevfs_ioctl32 __user *uioc; | |
1778 | struct usbdevfs_ioctl ctrl; | |
1779 | u32 udata; | |
1780 | ||
058120d7 | 1781 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1782 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1783 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1784 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1785 | __get_user(udata, &uioc->data)) |
1786 | return -EFAULT; | |
1787 | ctrl.data = compat_ptr(udata); | |
1788 | ||
1789 | return proc_ioctl(ps, &ctrl); | |
1790 | } | |
1791 | #endif | |
1792 | ||
7cbe5dca AS |
1793 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1794 | { | |
1795 | unsigned portnum; | |
1796 | int rc; | |
1797 | ||
1798 | if (get_user(portnum, (unsigned __user *) arg)) | |
1799 | return -EFAULT; | |
1800 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1801 | if (rc == 0) | |
1802 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1803 | portnum, task_pid_nr(current), current->comm); | |
1804 | return rc; | |
1805 | } | |
1806 | ||
1807 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1808 | { | |
1809 | unsigned portnum; | |
1810 | ||
1811 | if (get_user(portnum, (unsigned __user *) arg)) | |
1812 | return -EFAULT; | |
1813 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1814 | } | |
1815 | ||
1da177e4 LT |
1816 | /* |
1817 | * NOTE: All requests here that have interface numbers as parameters | |
1818 | * are assuming that somehow the configuration has been prevented from | |
1819 | * changing. But there's no mechanism to ensure that... | |
1820 | */ | |
637e8a60 AB |
1821 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1822 | void __user *p) | |
1da177e4 | 1823 | { |
ec17cf1c | 1824 | struct dev_state *ps = file->private_data; |
637e8a60 | 1825 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 | 1826 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1827 | int ret = -ENOTTY; |
1828 | ||
1829 | if (!(file->f_mode & FMODE_WRITE)) | |
1830 | return -EPERM; | |
01412a21 | 1831 | |
1da177e4 | 1832 | usb_lock_device(dev); |
349710c3 | 1833 | if (!connected(ps)) { |
1da177e4 LT |
1834 | usb_unlock_device(dev); |
1835 | return -ENODEV; | |
1836 | } | |
1837 | ||
1838 | switch (cmd) { | |
1839 | case USBDEVFS_CONTROL: | |
441b62c1 | 1840 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1841 | ret = proc_control(ps, p); |
1842 | if (ret >= 0) | |
1843 | inode->i_mtime = CURRENT_TIME; | |
1844 | break; | |
1845 | ||
1846 | case USBDEVFS_BULK: | |
441b62c1 | 1847 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1848 | ret = proc_bulk(ps, p); |
1849 | if (ret >= 0) | |
1850 | inode->i_mtime = CURRENT_TIME; | |
1851 | break; | |
1852 | ||
1853 | case USBDEVFS_RESETEP: | |
441b62c1 | 1854 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1855 | ret = proc_resetep(ps, p); |
1856 | if (ret >= 0) | |
1857 | inode->i_mtime = CURRENT_TIME; | |
1858 | break; | |
1859 | ||
1860 | case USBDEVFS_RESET: | |
441b62c1 | 1861 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1862 | ret = proc_resetdevice(ps); |
1863 | break; | |
1864 | ||
1865 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1866 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1867 | ret = proc_clearhalt(ps, p); |
1868 | if (ret >= 0) | |
1869 | inode->i_mtime = CURRENT_TIME; | |
1870 | break; | |
1871 | ||
1872 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1873 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1874 | ret = proc_getdriver(ps, p); |
1875 | break; | |
1876 | ||
1877 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1878 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1879 | ret = proc_connectinfo(ps, p); |
1880 | break; | |
1881 | ||
1882 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1883 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1884 | ret = proc_setintf(ps, p); |
1885 | break; | |
1886 | ||
1887 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1888 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1889 | ret = proc_setconfig(ps, p); |
1890 | break; | |
1891 | ||
1892 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1893 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1894 | ret = proc_submiturb(ps, p); |
1895 | if (ret >= 0) | |
1896 | inode->i_mtime = CURRENT_TIME; | |
1897 | break; | |
1898 | ||
1899 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1900 | case USBDEVFS_CONTROL32: |
1901 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
1902 | ret = proc_control_compat(ps, p); | |
1903 | if (ret >= 0) | |
1904 | inode->i_mtime = CURRENT_TIME; | |
1905 | break; | |
1906 | ||
1907 | case USBDEVFS_BULK32: | |
1908 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
1909 | ret = proc_bulk_compat(ps, p); | |
1910 | if (ret >= 0) | |
1911 | inode->i_mtime = CURRENT_TIME; | |
1912 | break; | |
1913 | ||
1914 | case USBDEVFS_DISCSIGNAL32: | |
1915 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
1916 | ret = proc_disconnectsignal_compat(ps, p); | |
1917 | break; | |
1da177e4 LT |
1918 | |
1919 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1920 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1921 | ret = proc_submiturb_compat(ps, p); |
1922 | if (ret >= 0) | |
1923 | inode->i_mtime = CURRENT_TIME; | |
1924 | break; | |
1925 | ||
1926 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1927 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1928 | ret = proc_reapurb_compat(ps, p); |
1929 | break; | |
1930 | ||
1931 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 1932 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
1933 | ret = proc_reapurbnonblock_compat(ps, p); |
1934 | break; | |
1935 | ||
c36fc889 | 1936 | case USBDEVFS_IOCTL32: |
637e8a60 | 1937 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 1938 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1939 | break; |
1da177e4 LT |
1940 | #endif |
1941 | ||
1942 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1943 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1944 | ret = proc_unlinkurb(ps, p); |
1945 | break; | |
1946 | ||
1947 | case USBDEVFS_REAPURB: | |
441b62c1 | 1948 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1949 | ret = proc_reapurb(ps, p); |
1950 | break; | |
1951 | ||
1952 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 1953 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
1954 | ret = proc_reapurbnonblock(ps, p); |
1955 | break; | |
1956 | ||
1957 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1958 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1959 | ret = proc_disconnectsignal(ps, p); |
1960 | break; | |
1961 | ||
1962 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1963 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1964 | ret = proc_claiminterface(ps, p); |
1965 | break; | |
1966 | ||
1967 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1968 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1969 | ret = proc_releaseinterface(ps, p); |
1970 | break; | |
1971 | ||
1972 | case USBDEVFS_IOCTL: | |
441b62c1 | 1973 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1974 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1975 | break; |
7cbe5dca AS |
1976 | |
1977 | case USBDEVFS_CLAIM_PORT: | |
1978 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1979 | ret = proc_claim_port(ps, p); | |
1980 | break; | |
1981 | ||
1982 | case USBDEVFS_RELEASE_PORT: | |
1983 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1984 | ret = proc_release_port(ps, p); | |
1985 | break; | |
1da177e4 LT |
1986 | } |
1987 | usb_unlock_device(dev); | |
1988 | if (ret >= 0) | |
1989 | inode->i_atime = CURRENT_TIME; | |
1990 | return ret; | |
1991 | } | |
1992 | ||
637e8a60 AB |
1993 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
1994 | unsigned long arg) | |
1995 | { | |
1996 | int ret; | |
1997 | ||
637e8a60 | 1998 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
1999 | |
2000 | return ret; | |
2001 | } | |
2002 | ||
2003 | #ifdef CONFIG_COMPAT | |
2004 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2005 | unsigned long arg) | |
2006 | { | |
2007 | int ret; | |
2008 | ||
637e8a60 | 2009 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2010 | |
2011 | return ret; | |
2012 | } | |
2013 | #endif | |
2014 | ||
1da177e4 | 2015 | /* No kernel lock - fine */ |
04e482ff GKH |
2016 | static unsigned int usbdev_poll(struct file *file, |
2017 | struct poll_table_struct *wait) | |
1da177e4 | 2018 | { |
ec17cf1c TK |
2019 | struct dev_state *ps = file->private_data; |
2020 | unsigned int mask = 0; | |
1da177e4 LT |
2021 | |
2022 | poll_wait(file, &ps->wait, wait); | |
2023 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2024 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2025 | if (!connected(ps)) |
1da177e4 LT |
2026 | mask |= POLLERR | POLLHUP; |
2027 | return mask; | |
2028 | } | |
2029 | ||
9f8b17e6 | 2030 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
2031 | .owner = THIS_MODULE, |
2032 | .llseek = usbdev_lseek, | |
2033 | .read = usbdev_read, | |
2034 | .poll = usbdev_poll, | |
2035 | .unlocked_ioctl = usbdev_ioctl, | |
2036 | #ifdef CONFIG_COMPAT | |
2037 | .compat_ioctl = usbdev_compat_ioctl, | |
2038 | #endif | |
2039 | .open = usbdev_open, | |
2040 | .release = usbdev_release, | |
1da177e4 | 2041 | }; |
fbf82fd2 | 2042 | |
501950d8 | 2043 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
2044 | { |
2045 | struct dev_state *ps; | |
2046 | struct siginfo sinfo; | |
2047 | ||
2048 | while (!list_empty(&udev->filelist)) { | |
2049 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
2050 | destroy_all_async(ps); | |
2051 | wake_up_all(&ps->wait); | |
2052 | list_del_init(&ps->list); | |
2053 | if (ps->discsignr) { | |
2054 | sinfo.si_signo = ps->discsignr; | |
2055 | sinfo.si_errno = EPIPE; | |
2056 | sinfo.si_code = SI_ASYNCIO; | |
2057 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2058 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2059 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2060 | } |
2061 | } | |
2062 | } | |
2063 | ||
9f8b17e6 KS |
2064 | #ifdef CONFIG_USB_DEVICE_CLASS |
2065 | static struct class *usb_classdev_class; | |
2066 | ||
2067 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 2068 | { |
e04199b2 AS |
2069 | struct device *cldev; |
2070 | ||
b0b090e5 GKH |
2071 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
2072 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
2073 | dev->devnum); | |
e04199b2 AS |
2074 | if (IS_ERR(cldev)) |
2075 | return PTR_ERR(cldev); | |
2076 | dev->usb_classdev = cldev; | |
27d39e26 | 2077 | return 0; |
fbf82fd2 KS |
2078 | } |
2079 | ||
9f8b17e6 | 2080 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 2081 | { |
e04199b2 AS |
2082 | if (dev->usb_classdev) |
2083 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
2084 | } |
2085 | ||
501950d8 AS |
2086 | #else |
2087 | #define usb_classdev_add(dev) 0 | |
2088 | #define usb_classdev_remove(dev) do {} while (0) | |
2089 | ||
2090 | #endif | |
2091 | ||
2092 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 2093 | unsigned long action, void *dev) |
a7b986b3 GKH |
2094 | { |
2095 | switch (action) { | |
2096 | case USB_DEVICE_ADD: | |
9f8b17e6 | 2097 | if (usb_classdev_add(dev)) |
27d39e26 | 2098 | return NOTIFY_BAD; |
a7b986b3 GKH |
2099 | break; |
2100 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 2101 | usb_classdev_remove(dev); |
501950d8 | 2102 | usbdev_remove(dev); |
a7b986b3 GKH |
2103 | break; |
2104 | } | |
2105 | return NOTIFY_OK; | |
2106 | } | |
2107 | ||
2108 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2109 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2110 | }; |
2111 | ||
7e7654a9 | 2112 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2113 | |
9f8b17e6 | 2114 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2115 | { |
2116 | int retval; | |
2117 | ||
fad21bdf | 2118 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2119 | "usb_device"); |
fbf82fd2 | 2120 | if (retval) { |
69a85942 | 2121 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2122 | goto out; |
2123 | } | |
9f8b17e6 | 2124 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2125 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2126 | if (retval) { |
69a85942 GKH |
2127 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2128 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2129 | goto error_cdev; |
fbf82fd2 | 2130 | } |
9f8b17e6 KS |
2131 | #ifdef CONFIG_USB_DEVICE_CLASS |
2132 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
2133 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 2134 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
2135 | retval = PTR_ERR(usb_classdev_class); |
2136 | cdev_del(&usb_device_cdev); | |
2137 | usb_classdev_class = NULL; | |
2138 | goto out; | |
fbf82fd2 | 2139 | } |
e105b8bf DW |
2140 | /* devices of this class shadow the major:minor of their parent |
2141 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
2142 | * to /sys/dev | |
2143 | */ | |
2144 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 2145 | #endif |
501950d8 | 2146 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2147 | out: |
2148 | return retval; | |
a7b986b3 | 2149 | |
a7b986b3 GKH |
2150 | error_cdev: |
2151 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2152 | goto out; | |
fbf82fd2 KS |
2153 | } |
2154 | ||
9f8b17e6 | 2155 | void usb_devio_cleanup(void) |
fbf82fd2 | 2156 | { |
a7b986b3 | 2157 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 2158 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
2159 | class_destroy(usb_classdev_class); |
2160 | #endif | |
fbf82fd2 | 2161 | cdev_del(&usb_device_cdev); |
fad21bdf | 2162 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2163 | } |