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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> |
3d97ff63 | 50 | #include <linux/scatterlist.h> |
1da177e4 LT |
51 | #include <asm/uaccess.h> |
52 | #include <asm/byteorder.h> | |
53 | #include <linux/moduleparam.h> | |
54 | ||
1da177e4 LT |
55 | #include "usb.h" |
56 | ||
fbf82fd2 KS |
57 | #define USB_MAXBUS 64 |
58 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
3d97ff63 | 59 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 60 | |
4a2a8a2c AS |
61 | /* Mutual exclusion for removal, open, and release */ |
62 | DEFINE_MUTEX(usbfs_mutex); | |
63 | ||
cd9f0375 AS |
64 | struct dev_state { |
65 | struct list_head list; /* state list */ | |
66 | struct usb_device *dev; | |
67 | struct file *file; | |
68 | spinlock_t lock; /* protects the async urb lists */ | |
69 | struct list_head async_pending; | |
70 | struct list_head async_completed; | |
71 | wait_queue_head_t wait; /* wake up if a request completed */ | |
72 | unsigned int discsignr; | |
73 | struct pid *disc_pid; | |
d178bc3a | 74 | const struct cred *cred; |
cd9f0375 AS |
75 | void __user *disccontext; |
76 | unsigned long ifclaimed; | |
77 | u32 secid; | |
01c6460f | 78 | u32 disabled_bulk_eps; |
cd9f0375 AS |
79 | }; |
80 | ||
1da177e4 LT |
81 | struct async { |
82 | struct list_head asynclist; | |
83 | struct dev_state *ps; | |
2425c08b | 84 | struct pid *pid; |
d178bc3a | 85 | const struct cred *cred; |
1da177e4 LT |
86 | unsigned int signr; |
87 | unsigned int ifnum; | |
88 | void __user *userbuffer; | |
89 | void __user *userurb; | |
90 | struct urb *urb; | |
add1aaea | 91 | unsigned int mem_usage; |
e015268d | 92 | int status; |
7a01955f | 93 | u32 secid; |
01c6460f AS |
94 | u8 bulk_addr; |
95 | u8 bulk_status; | |
1da177e4 LT |
96 | }; |
97 | ||
90ab5ee9 | 98 | static bool usbfs_snoop; |
04e482ff GKH |
99 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
100 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
101 | |
102 | #define snoop(dev, format, arg...) \ | |
103 | do { \ | |
104 | if (usbfs_snoop) \ | |
04e482ff | 105 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
106 | } while (0) |
107 | ||
4c6e8971 AS |
108 | enum snoop_when { |
109 | SUBMIT, COMPLETE | |
110 | }; | |
fad21bdf | 111 | |
4c6e8971 | 112 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 113 | |
add1aaea | 114 | /* Limit on the total amount of memory we can allocate for transfers */ |
3f5eb8d5 AS |
115 | static unsigned usbfs_memory_mb = 16; |
116 | module_param(usbfs_memory_mb, uint, 0644); | |
117 | MODULE_PARM_DESC(usbfs_memory_mb, | |
118 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
119 | ||
120 | /* Hard limit, necessary to avoid aithmetic overflow */ | |
121 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) | |
1da177e4 | 122 | |
add1aaea AS |
123 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
124 | ||
125 | /* Check whether it's okay to allocate more memory for a transfer */ | |
126 | static int usbfs_increase_memory_usage(unsigned amount) | |
127 | { | |
3f5eb8d5 AS |
128 | unsigned lim; |
129 | ||
130 | /* | |
131 | * Convert usbfs_memory_mb to bytes, avoiding overflows. | |
132 | * 0 means use the hard limit (effectively unlimited). | |
133 | */ | |
134 | lim = ACCESS_ONCE(usbfs_memory_mb); | |
135 | if (lim == 0 || lim > (USBFS_XFER_MAX >> 20)) | |
136 | lim = USBFS_XFER_MAX; | |
137 | else | |
138 | lim <<= 20; | |
139 | ||
add1aaea | 140 | atomic_add(amount, &usbfs_memory_usage); |
3f5eb8d5 | 141 | if (atomic_read(&usbfs_memory_usage) <= lim) |
add1aaea AS |
142 | return 0; |
143 | atomic_sub(amount, &usbfs_memory_usage); | |
144 | return -ENOMEM; | |
145 | } | |
146 | ||
147 | /* Memory for a transfer is being deallocated */ | |
148 | static void usbfs_decrease_memory_usage(unsigned amount) | |
149 | { | |
150 | atomic_sub(amount, &usbfs_memory_usage); | |
151 | } | |
4c6e8971 | 152 | |
d34d9721 | 153 | static int connected(struct dev_state *ps) |
1da177e4 | 154 | { |
349710c3 AS |
155 | return (!list_empty(&ps->list) && |
156 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
157 | } |
158 | ||
159 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
160 | { | |
161 | loff_t ret; | |
162 | ||
496ad9aa | 163 | mutex_lock(&file_inode(file)->i_mutex); |
1da177e4 LT |
164 | |
165 | switch (orig) { | |
166 | case 0: | |
167 | file->f_pos = offset; | |
168 | ret = file->f_pos; | |
169 | break; | |
170 | case 1: | |
171 | file->f_pos += offset; | |
172 | ret = file->f_pos; | |
173 | break; | |
174 | case 2: | |
175 | default: | |
176 | ret = -EINVAL; | |
177 | } | |
178 | ||
496ad9aa | 179 | mutex_unlock(&file_inode(file)->i_mutex); |
1da177e4 LT |
180 | return ret; |
181 | } | |
182 | ||
04e482ff GKH |
183 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
184 | loff_t *ppos) | |
1da177e4 | 185 | { |
ec17cf1c | 186 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
187 | struct usb_device *dev = ps->dev; |
188 | ssize_t ret = 0; | |
189 | unsigned len; | |
190 | loff_t pos; | |
191 | int i; | |
192 | ||
193 | pos = *ppos; | |
194 | usb_lock_device(dev); | |
349710c3 | 195 | if (!connected(ps)) { |
1da177e4 LT |
196 | ret = -ENODEV; |
197 | goto err; | |
198 | } else if (pos < 0) { | |
199 | ret = -EINVAL; | |
200 | goto err; | |
201 | } | |
202 | ||
203 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
204 | /* 18 bytes - fits on the stack */ |
205 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
206 | |
207 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
208 | le16_to_cpus(&temp_desc.bcdUSB); |
209 | le16_to_cpus(&temp_desc.idVendor); | |
210 | le16_to_cpus(&temp_desc.idProduct); | |
211 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
212 | |
213 | len = sizeof(struct usb_device_descriptor) - pos; | |
214 | if (len > nbytes) | |
215 | len = nbytes; | |
8781ba0a | 216 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
217 | ret = -EFAULT; |
218 | goto err; | |
219 | } | |
1da177e4 LT |
220 | |
221 | *ppos += len; | |
222 | buf += len; | |
223 | nbytes -= len; | |
224 | ret += len; | |
225 | } | |
226 | ||
227 | pos = sizeof(struct usb_device_descriptor); | |
228 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
229 | struct usb_config_descriptor *config = | |
230 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
231 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
232 | ||
233 | if (*ppos < pos + length) { | |
234 | ||
235 | /* The descriptor may claim to be longer than it | |
236 | * really is. Here is the actual allocated length. */ | |
237 | unsigned alloclen = | |
238 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
239 | ||
240 | len = length - (*ppos - pos); | |
241 | if (len > nbytes) | |
242 | len = nbytes; | |
243 | ||
244 | /* Simply don't write (skip over) unallocated parts */ | |
245 | if (alloclen > (*ppos - pos)) { | |
246 | alloclen -= (*ppos - pos); | |
247 | if (copy_to_user(buf, | |
248 | dev->rawdescriptors[i] + (*ppos - pos), | |
249 | min(len, alloclen))) { | |
250 | ret = -EFAULT; | |
251 | goto err; | |
252 | } | |
253 | } | |
254 | ||
255 | *ppos += len; | |
256 | buf += len; | |
257 | nbytes -= len; | |
258 | ret += len; | |
259 | } | |
260 | ||
261 | pos += length; | |
262 | } | |
263 | ||
264 | err: | |
265 | usb_unlock_device(dev); | |
266 | return ret; | |
267 | } | |
268 | ||
269 | /* | |
270 | * async list handling | |
271 | */ | |
272 | ||
273 | static struct async *alloc_async(unsigned int numisoframes) | |
274 | { | |
dd95b814 | 275 | struct async *as; |
0a1ef3b5 | 276 | |
dd95b814 | 277 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
278 | if (!as) |
279 | return NULL; | |
1da177e4 LT |
280 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
281 | if (!as->urb) { | |
282 | kfree(as); | |
283 | return NULL; | |
284 | } | |
04e482ff | 285 | return as; |
1da177e4 LT |
286 | } |
287 | ||
288 | static void free_async(struct async *as) | |
289 | { | |
3d97ff63 HG |
290 | int i; |
291 | ||
2425c08b | 292 | put_pid(as->pid); |
1b41c832 SS |
293 | if (as->cred) |
294 | put_cred(as->cred); | |
3d97ff63 HG |
295 | for (i = 0; i < as->urb->num_sgs; i++) { |
296 | if (sg_page(&as->urb->sg[i])) | |
297 | kfree(sg_virt(&as->urb->sg[i])); | |
298 | } | |
299 | kfree(as->urb->sg); | |
6fd19f4b JJ |
300 | kfree(as->urb->transfer_buffer); |
301 | kfree(as->urb->setup_packet); | |
1da177e4 | 302 | usb_free_urb(as->urb); |
add1aaea | 303 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 304 | kfree(as); |
1da177e4 LT |
305 | } |
306 | ||
d34d9721 | 307 | static void async_newpending(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_add_tail(&as->asynclist, &ps->async_pending); | |
314 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
315 | } |
316 | ||
d34d9721 | 317 | static void async_removepending(struct async *as) |
1da177e4 | 318 | { |
04e482ff GKH |
319 | struct dev_state *ps = as->ps; |
320 | unsigned long flags; | |
321 | ||
322 | spin_lock_irqsave(&ps->lock, flags); | |
323 | list_del_init(&as->asynclist); | |
324 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
325 | } |
326 | ||
d34d9721 | 327 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 328 | { |
04e482ff GKH |
329 | unsigned long flags; |
330 | struct async *as = NULL; | |
331 | ||
332 | spin_lock_irqsave(&ps->lock, flags); | |
333 | if (!list_empty(&ps->async_completed)) { | |
334 | as = list_entry(ps->async_completed.next, struct async, | |
335 | asynclist); | |
336 | list_del_init(&as->asynclist); | |
337 | } | |
338 | spin_unlock_irqrestore(&ps->lock, flags); | |
339 | return as; | |
1da177e4 LT |
340 | } |
341 | ||
d34d9721 | 342 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 343 | void __user *userurb) |
1da177e4 | 344 | { |
04e482ff | 345 | struct async *as; |
1da177e4 | 346 | |
1da177e4 LT |
347 | list_for_each_entry(as, &ps->async_pending, asynclist) |
348 | if (as->userurb == userurb) { | |
349 | list_del_init(&as->asynclist); | |
1da177e4 LT |
350 | return as; |
351 | } | |
4e09dcf2 | 352 | |
04e482ff | 353 | return NULL; |
1da177e4 LT |
354 | } |
355 | ||
4c6e8971 AS |
356 | static void snoop_urb(struct usb_device *udev, |
357 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
358 | int timeout_or_status, enum snoop_when when, |
359 | unsigned char *data, unsigned data_len) | |
e639dd3f | 360 | { |
4c6e8971 AS |
361 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
362 | static const char *dirs[] = {"out", "in"}; | |
363 | int ep; | |
364 | const char *t, *d; | |
e639dd3f GKH |
365 | |
366 | if (!usbfs_snoop) | |
367 | return; | |
368 | ||
4c6e8971 AS |
369 | ep = usb_pipeendpoint(pipe); |
370 | t = types[usb_pipetype(pipe)]; | |
371 | d = dirs[!!usb_pipein(pipe)]; | |
372 | ||
373 | if (userurb) { /* Async */ | |
374 | if (when == SUBMIT) | |
375 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
376 | "length %u\n", | |
377 | userurb, ep, t, d, length); | |
378 | else | |
379 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
380 | "actual_length %u status %d\n", | |
381 | userurb, ep, t, d, length, | |
382 | timeout_or_status); | |
383 | } else { | |
384 | if (when == SUBMIT) | |
385 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
386 | "timeout %d\n", | |
387 | ep, t, d, length, timeout_or_status); | |
388 | else | |
389 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
390 | "status %d\n", | |
391 | ep, t, d, length, timeout_or_status); | |
392 | } | |
0880aef4 CF |
393 | |
394 | if (data && data_len > 0) { | |
395 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
396 | data, data_len, 1); | |
397 | } | |
e639dd3f GKH |
398 | } |
399 | ||
3d97ff63 HG |
400 | static void snoop_urb_data(struct urb *urb, unsigned len) |
401 | { | |
402 | int i, size; | |
403 | ||
404 | if (!usbfs_snoop) | |
405 | return; | |
406 | ||
407 | if (urb->num_sgs == 0) { | |
408 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
409 | urb->transfer_buffer, len, 1); | |
410 | return; | |
411 | } | |
412 | ||
413 | for (i = 0; i < urb->num_sgs && len; i++) { | |
414 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
415 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
416 | sg_virt(&urb->sg[i]), size, 1); | |
417 | len -= size; | |
418 | } | |
419 | } | |
420 | ||
421 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
422 | { | |
423 | unsigned i, len, size; | |
424 | ||
425 | if (urb->number_of_packets > 0) /* Isochronous */ | |
426 | len = urb->transfer_buffer_length; | |
427 | else /* Non-Isoc */ | |
428 | len = urb->actual_length; | |
429 | ||
430 | if (urb->num_sgs == 0) { | |
431 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
432 | return -EFAULT; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | for (i = 0; i < urb->num_sgs && len; i++) { | |
437 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
438 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
439 | return -EFAULT; | |
440 | userbuffer += size; | |
441 | len -= size; | |
442 | } | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
01c6460f AS |
447 | #define AS_CONTINUATION 1 |
448 | #define AS_UNLINK 2 | |
449 | ||
450 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
451 | __releases(ps->lock) | |
452 | __acquires(ps->lock) | |
453 | { | |
4e09dcf2 | 454 | struct urb *urb; |
01c6460f AS |
455 | struct async *as; |
456 | ||
457 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
458 | * including the first one without AS_CONTINUATION. If such an | |
459 | * URB is encountered then a new transfer has already started so | |
460 | * the endpoint doesn't need to be disabled; otherwise it does. | |
461 | */ | |
462 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
463 | if (as->bulk_addr == bulk_addr) { | |
464 | if (as->bulk_status != AS_CONTINUATION) | |
465 | goto rescan; | |
466 | as->bulk_status = AS_UNLINK; | |
467 | as->bulk_addr = 0; | |
468 | } | |
469 | } | |
470 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
471 | ||
472 | /* Now carefully unlink all the marked pending URBs */ | |
473 | rescan: | |
474 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
475 | if (as->bulk_status == AS_UNLINK) { | |
476 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
477 | urb = as->urb; |
478 | usb_get_urb(urb); | |
01c6460f | 479 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
480 | usb_unlink_urb(urb); |
481 | usb_put_urb(urb); | |
01c6460f AS |
482 | spin_lock(&ps->lock); |
483 | goto rescan; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
7d12e780 | 488 | static void async_completed(struct urb *urb) |
1da177e4 | 489 | { |
04e482ff GKH |
490 | struct async *as = urb->context; |
491 | struct dev_state *ps = as->ps; | |
1da177e4 | 492 | struct siginfo sinfo; |
516a1a07 | 493 | struct pid *pid = NULL; |
516a1a07 | 494 | u32 secid = 0; |
d178bc3a | 495 | const struct cred *cred = NULL; |
516a1a07 | 496 | int signr; |
1da177e4 | 497 | |
04e482ff GKH |
498 | spin_lock(&ps->lock); |
499 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 500 | as->status = urb->status; |
516a1a07 ON |
501 | signr = as->signr; |
502 | if (signr) { | |
1da177e4 | 503 | sinfo.si_signo = as->signr; |
e015268d | 504 | sinfo.si_errno = as->status; |
1da177e4 LT |
505 | sinfo.si_code = SI_ASYNCIO; |
506 | sinfo.si_addr = as->userurb; | |
aec01c58 | 507 | pid = get_pid(as->pid); |
d178bc3a | 508 | cred = get_cred(as->cred); |
516a1a07 | 509 | secid = as->secid; |
1da177e4 | 510 | } |
e639dd3f | 511 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 512 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 HG |
513 | as->status, COMPLETE, NULL, 0); |
514 | if ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_IN) | |
515 | snoop_urb_data(urb, urb->actual_length); | |
516 | ||
01c6460f AS |
517 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
518 | as->status != -ENOENT) | |
519 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
520 | spin_unlock(&ps->lock); |
521 | ||
aec01c58 | 522 | if (signr) { |
d178bc3a | 523 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 524 | put_pid(pid); |
d178bc3a | 525 | put_cred(cred); |
aec01c58 | 526 | } |
516a1a07 | 527 | |
e639dd3f | 528 | wake_up(&ps->wait); |
1da177e4 LT |
529 | } |
530 | ||
04e482ff | 531 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 | 532 | { |
4e09dcf2 | 533 | struct urb *urb; |
1da177e4 LT |
534 | struct async *as; |
535 | unsigned long flags; | |
536 | ||
537 | spin_lock_irqsave(&ps->lock, flags); | |
538 | while (!list_empty(list)) { | |
539 | as = list_entry(list->next, struct async, asynclist); | |
540 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
541 | urb = as->urb; |
542 | usb_get_urb(urb); | |
1da177e4 LT |
543 | |
544 | /* drop the spinlock so the completion handler can run */ | |
545 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
546 | usb_kill_urb(urb); |
547 | usb_put_urb(urb); | |
1da177e4 LT |
548 | spin_lock_irqsave(&ps->lock, flags); |
549 | } | |
550 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
551 | } |
552 | ||
04e482ff GKH |
553 | static void destroy_async_on_interface(struct dev_state *ps, |
554 | unsigned int ifnum) | |
1da177e4 LT |
555 | { |
556 | struct list_head *p, *q, hitlist; | |
557 | unsigned long flags; | |
558 | ||
559 | INIT_LIST_HEAD(&hitlist); | |
560 | spin_lock_irqsave(&ps->lock, flags); | |
561 | list_for_each_safe(p, q, &ps->async_pending) | |
562 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
563 | list_move_tail(p, &hitlist); | |
564 | spin_unlock_irqrestore(&ps->lock, flags); | |
565 | destroy_async(ps, &hitlist); | |
566 | } | |
567 | ||
d34d9721 | 568 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 569 | { |
04e482ff | 570 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
571 | } |
572 | ||
573 | /* | |
574 | * interface claims are made only at the request of user level code, | |
575 | * which can also release them (explicitly or by closing files). | |
576 | * they're also undone when devices disconnect. | |
577 | */ | |
578 | ||
04e482ff GKH |
579 | static int driver_probe(struct usb_interface *intf, |
580 | const struct usb_device_id *id) | |
1da177e4 LT |
581 | { |
582 | return -ENODEV; | |
583 | } | |
584 | ||
585 | static void driver_disconnect(struct usb_interface *intf) | |
586 | { | |
04e482ff | 587 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
588 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
589 | ||
590 | if (!ps) | |
591 | return; | |
592 | ||
593 | /* NOTE: this relies on usbcore having canceled and completed | |
594 | * all pending I/O requests; 2.6 does that. | |
595 | */ | |
596 | ||
597 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
598 | clear_bit(ifnum, &ps->ifclaimed); | |
599 | else | |
3b6004f3 GKH |
600 | dev_warn(&intf->dev, "interface number %u out of range\n", |
601 | ifnum); | |
1da177e4 | 602 | |
04e482ff | 603 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
604 | |
605 | /* force async requests to complete */ | |
606 | destroy_async_on_interface(ps, ifnum); | |
607 | } | |
608 | ||
2e2eb83f AS |
609 | /* The following routines are merely placeholders. There is no way |
610 | * to inform a user task about suspend or resumes. | |
611 | */ | |
612 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
613 | { | |
614 | return 0; | |
615 | } | |
616 | ||
617 | static int driver_resume(struct usb_interface *intf) | |
618 | { | |
619 | return 0; | |
620 | } | |
621 | ||
1da177e4 | 622 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
623 | .name = "usbfs", |
624 | .probe = driver_probe, | |
625 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
626 | .suspend = driver_suspend, |
627 | .resume = driver_resume, | |
1da177e4 LT |
628 | }; |
629 | ||
630 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
631 | { | |
632 | struct usb_device *dev = ps->dev; | |
633 | struct usb_interface *intf; | |
634 | int err; | |
635 | ||
636 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
637 | return -EINVAL; | |
638 | /* already claimed */ | |
639 | if (test_bit(ifnum, &ps->ifclaimed)) | |
640 | return 0; | |
641 | ||
1da177e4 LT |
642 | intf = usb_ifnum_to_if(dev, ifnum); |
643 | if (!intf) | |
644 | err = -ENOENT; | |
645 | else | |
646 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
647 | if (err == 0) |
648 | set_bit(ifnum, &ps->ifclaimed); | |
649 | return err; | |
650 | } | |
651 | ||
652 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
653 | { | |
654 | struct usb_device *dev; | |
655 | struct usb_interface *intf; | |
656 | int err; | |
657 | ||
658 | err = -EINVAL; | |
659 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
660 | return err; | |
661 | dev = ps->dev; | |
1da177e4 LT |
662 | intf = usb_ifnum_to_if(dev, ifnum); |
663 | if (!intf) | |
664 | err = -ENOENT; | |
665 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
666 | usb_driver_release_interface(&usbfs_driver, intf); | |
667 | err = 0; | |
668 | } | |
1da177e4 LT |
669 | return err; |
670 | } | |
671 | ||
672 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
673 | { | |
674 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
675 | return -EHOSTUNREACH; | |
676 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
677 | return -EINVAL; | |
678 | if (test_bit(ifnum, &ps->ifclaimed)) | |
679 | return 0; | |
680 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
681 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
682 | "interface %u before use\n", task_pid_nr(current), | |
683 | current->comm, ifnum); | |
1da177e4 LT |
684 | return claimintf(ps, ifnum); |
685 | } | |
686 | ||
687 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
688 | { | |
689 | unsigned int i, j, e; | |
04e482ff | 690 | struct usb_interface *intf; |
1da177e4 LT |
691 | struct usb_host_interface *alts; |
692 | struct usb_endpoint_descriptor *endpt; | |
693 | ||
694 | if (ep & ~(USB_DIR_IN|0xf)) | |
695 | return -EINVAL; | |
696 | if (!dev->actconfig) | |
697 | return -ESRCH; | |
698 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
699 | intf = dev->actconfig->interface[i]; | |
700 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 701 | alts = &intf->altsetting[j]; |
1da177e4 LT |
702 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
703 | endpt = &alts->endpoint[e].desc; | |
704 | if (endpt->bEndpointAddress == ep) | |
705 | return alts->desc.bInterfaceNumber; | |
706 | } | |
707 | } | |
708 | } | |
04e482ff | 709 | return -ENOENT; |
1da177e4 LT |
710 | } |
711 | ||
04e482ff | 712 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
393cbb51 | 713 | unsigned int request, unsigned int index) |
1da177e4 LT |
714 | { |
715 | int ret = 0; | |
393cbb51 | 716 | struct usb_host_interface *alt_setting; |
1da177e4 | 717 | |
6da9c990 DV |
718 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
719 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 720 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
721 | return -EHOSTUNREACH; |
722 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
723 | return 0; | |
724 | ||
393cbb51 MD |
725 | /* |
726 | * check for the special corner case 'get_device_id' in the printer | |
727 | * class specification, where wIndex is (interface << 8 | altsetting) | |
728 | * instead of just interface | |
729 | */ | |
730 | if (requesttype == 0xa1 && request == 0) { | |
731 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
732 | index >> 8, index & 0xff); | |
733 | if (alt_setting | |
734 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
735 | index >>= 8; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | index &= 0xff; |
739 | switch (requesttype & USB_RECIP_MASK) { | |
740 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
741 | ret = findintfep(ps->dev, index); |
742 | if (ret >= 0) | |
1da177e4 LT |
743 | ret = checkintf(ps, ret); |
744 | break; | |
745 | ||
746 | case USB_RECIP_INTERFACE: | |
747 | ret = checkintf(ps, index); | |
748 | break; | |
749 | } | |
750 | return ret; | |
751 | } | |
752 | ||
61ad04a8 | 753 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 754 | { |
a80d5ff0 | 755 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 756 | } |
4592bf5a | 757 | |
61ad04a8 | 758 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
759 | { |
760 | struct device *dev; | |
761 | ||
a80d5ff0 DH |
762 | dev = bus_find_device(&usb_bus_type, NULL, |
763 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
764 | if (!dev) |
765 | return NULL; | |
9f8b17e6 KS |
766 | return container_of(dev, struct usb_device, dev); |
767 | } | |
4592bf5a | 768 | |
1da177e4 LT |
769 | /* |
770 | * file operations | |
771 | */ | |
772 | static int usbdev_open(struct inode *inode, struct file *file) | |
773 | { | |
fbf82fd2 | 774 | struct usb_device *dev = NULL; |
1da177e4 LT |
775 | struct dev_state *ps; |
776 | int ret; | |
777 | ||
1da177e4 | 778 | ret = -ENOMEM; |
04e482ff GKH |
779 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
780 | if (!ps) | |
62e299e6 | 781 | goto out_free_ps; |
1da177e4 | 782 | |
01105a24 | 783 | ret = -ENODEV; |
61ad04a8 | 784 | |
62e299e6 AS |
785 | /* Protect against simultaneous removal or release */ |
786 | mutex_lock(&usbfs_mutex); | |
787 | ||
9f8b17e6 | 788 | /* usbdev device-node */ |
fbf82fd2 | 789 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 790 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 791 | |
62e299e6 AS |
792 | mutex_unlock(&usbfs_mutex); |
793 | ||
794 | if (!dev) | |
795 | goto out_free_ps; | |
796 | ||
797 | usb_lock_device(dev); | |
798 | if (dev->state == USB_STATE_NOTATTACHED) | |
799 | goto out_unlock_device; | |
800 | ||
94fcda1f | 801 | ret = usb_autoresume_device(dev); |
01d883d4 | 802 | if (ret) |
62e299e6 | 803 | goto out_unlock_device; |
01d883d4 | 804 | |
1da177e4 LT |
805 | ps->dev = dev; |
806 | ps->file = file; | |
807 | spin_lock_init(&ps->lock); | |
316547fd | 808 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
809 | INIT_LIST_HEAD(&ps->async_pending); |
810 | INIT_LIST_HEAD(&ps->async_completed); | |
811 | init_waitqueue_head(&ps->wait); | |
812 | ps->discsignr = 0; | |
2425c08b | 813 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 814 | ps->cred = get_current_cred(); |
1da177e4 LT |
815 | ps->disccontext = NULL; |
816 | ps->ifclaimed = 0; | |
7a01955f | 817 | security_task_getsecid(current, &ps->secid); |
527660a8 | 818 | smp_wmb(); |
1da177e4 LT |
819 | list_add_tail(&ps->list, &dev->filelist); |
820 | file->private_data = ps; | |
62e299e6 | 821 | usb_unlock_device(dev); |
2da41d5f AS |
822 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
823 | current->comm); | |
62e299e6 AS |
824 | return ret; |
825 | ||
826 | out_unlock_device: | |
827 | usb_unlock_device(dev); | |
828 | usb_put_dev(dev); | |
829 | out_free_ps: | |
830 | kfree(ps); | |
4a2a8a2c | 831 | return ret; |
1da177e4 LT |
832 | } |
833 | ||
834 | static int usbdev_release(struct inode *inode, struct file *file) | |
835 | { | |
ec17cf1c | 836 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
837 | struct usb_device *dev = ps->dev; |
838 | unsigned int ifnum; | |
6ff10464 | 839 | struct async *as; |
1da177e4 LT |
840 | |
841 | usb_lock_device(dev); | |
7cbe5dca | 842 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 843 | |
1da177e4 | 844 | list_del_init(&ps->list); |
4a2a8a2c | 845 | |
1da177e4 LT |
846 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
847 | ifnum++) { | |
848 | if (test_bit(ifnum, &ps->ifclaimed)) | |
849 | releaseintf(ps, ifnum); | |
850 | } | |
851 | destroy_all_async(ps); | |
94fcda1f | 852 | usb_autosuspend_device(dev); |
1da177e4 LT |
853 | usb_unlock_device(dev); |
854 | usb_put_dev(dev); | |
2425c08b | 855 | put_pid(ps->disc_pid); |
d178bc3a | 856 | put_cred(ps->cred); |
6ff10464 AS |
857 | |
858 | as = async_getcompleted(ps); | |
859 | while (as) { | |
860 | free_async(as); | |
861 | as = async_getcompleted(ps); | |
862 | } | |
1da177e4 | 863 | kfree(ps); |
4a2a8a2c | 864 | return 0; |
1da177e4 LT |
865 | } |
866 | ||
867 | static int proc_control(struct dev_state *ps, void __user *arg) | |
868 | { | |
869 | struct usb_device *dev = ps->dev; | |
870 | struct usbdevfs_ctrltransfer ctrl; | |
871 | unsigned int tmo; | |
872 | unsigned char *tbuf; | |
ff66e3ce | 873 | unsigned wLength; |
4c6e8971 | 874 | int i, pipe, ret; |
1da177e4 LT |
875 | |
876 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
877 | return -EFAULT; | |
393cbb51 MD |
878 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
879 | ctrl.wIndex); | |
04e482ff | 880 | if (ret) |
1da177e4 | 881 | return ret; |
ff66e3ce AM |
882 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
883 | if (wLength > PAGE_SIZE) | |
1da177e4 | 884 | return -EINVAL; |
add1aaea AS |
885 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
886 | sizeof(struct usb_ctrlrequest)); | |
887 | if (ret) | |
888 | return ret; | |
04e482ff | 889 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
890 | if (!tbuf) { |
891 | ret = -ENOMEM; | |
892 | goto done; | |
893 | } | |
1da177e4 | 894 | tmo = ctrl.timeout; |
0880aef4 CF |
895 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
896 | "bRequest=%02x wValue=%04x " | |
897 | "wIndex=%04x wLength=%04x\n", | |
898 | ctrl.bRequestType, ctrl.bRequest, | |
899 | __le16_to_cpup(&ctrl.wValue), | |
900 | __le16_to_cpup(&ctrl.wIndex), | |
901 | __le16_to_cpup(&ctrl.wLength)); | |
1da177e4 | 902 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
903 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
904 | ctrl.wLength)) { | |
52fb743d AS |
905 | ret = -EINVAL; |
906 | goto done; | |
1da177e4 | 907 | } |
4c6e8971 | 908 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 909 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
910 | |
911 | usb_unlock_device(dev); | |
4c6e8971 | 912 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
913 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
914 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 915 | usb_lock_device(dev); |
0880aef4 | 916 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 917 | tbuf, max(i, 0)); |
1da177e4 | 918 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 919 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
920 | ret = -EFAULT; |
921 | goto done; | |
1da177e4 LT |
922 | } |
923 | } | |
924 | } else { | |
925 | if (ctrl.wLength) { | |
926 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
927 | ret = -EFAULT; |
928 | goto done; | |
1da177e4 LT |
929 | } |
930 | } | |
4c6e8971 | 931 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
932 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
933 | tbuf, ctrl.wLength); | |
4c6e8971 | 934 | |
1da177e4 | 935 | usb_unlock_device(dev); |
04e482ff GKH |
936 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
937 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
938 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 939 | usb_lock_device(dev); |
0880aef4 | 940 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 941 | } |
04e482ff | 942 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
943 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
944 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
945 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
946 | ctrl.wLength, i); | |
947 | } | |
52fb743d AS |
948 | ret = i; |
949 | done: | |
950 | free_page((unsigned long) tbuf); | |
add1aaea AS |
951 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
952 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 953 | return ret; |
1da177e4 LT |
954 | } |
955 | ||
956 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
957 | { | |
958 | struct usb_device *dev = ps->dev; | |
959 | struct usbdevfs_bulktransfer bulk; | |
960 | unsigned int tmo, len1, pipe; | |
961 | int len2; | |
962 | unsigned char *tbuf; | |
4c6e8971 | 963 | int i, ret; |
1da177e4 LT |
964 | |
965 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
966 | return -EFAULT; | |
04e482ff GKH |
967 | ret = findintfep(ps->dev, bulk.ep); |
968 | if (ret < 0) | |
1da177e4 | 969 | return ret; |
04e482ff GKH |
970 | ret = checkintf(ps, ret); |
971 | if (ret) | |
1da177e4 LT |
972 | return ret; |
973 | if (bulk.ep & USB_DIR_IN) | |
974 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
975 | else | |
976 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
977 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
978 | return -EINVAL; | |
979 | len1 = bulk.len; | |
3f5eb8d5 | 980 | if (len1 >= USBFS_XFER_MAX) |
1da177e4 | 981 | return -EINVAL; |
add1aaea AS |
982 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
983 | if (ret) | |
984 | return ret; | |
985 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) { | |
986 | ret = -ENOMEM; | |
987 | goto done; | |
988 | } | |
1da177e4 LT |
989 | tmo = bulk.timeout; |
990 | if (bulk.ep & 0x80) { | |
991 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
992 | ret = -EINVAL; |
993 | goto done; | |
1da177e4 | 994 | } |
0880aef4 | 995 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 996 | |
1da177e4 LT |
997 | usb_unlock_device(dev); |
998 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
999 | usb_lock_device(dev); | |
0880aef4 | 1000 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1001 | |
1da177e4 LT |
1002 | if (!i && len2) { |
1003 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1004 | ret = -EFAULT; |
1005 | goto done; | |
1da177e4 LT |
1006 | } |
1007 | } | |
1008 | } else { | |
1009 | if (len1) { | |
1010 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1011 | ret = -EFAULT; |
1012 | goto done; | |
1da177e4 LT |
1013 | } |
1014 | } | |
0880aef4 | 1015 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1016 | |
1da177e4 LT |
1017 | usb_unlock_device(dev); |
1018 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1019 | usb_lock_device(dev); | |
0880aef4 | 1020 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1021 | } |
52fb743d AS |
1022 | ret = (i < 0 ? i : len2); |
1023 | done: | |
1da177e4 | 1024 | kfree(tbuf); |
add1aaea | 1025 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1026 | return ret; |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
1030 | { | |
1031 | unsigned int ep; | |
1032 | int ret; | |
1033 | ||
1034 | if (get_user(ep, (unsigned int __user *)arg)) | |
1035 | return -EFAULT; | |
04e482ff GKH |
1036 | ret = findintfep(ps->dev, ep); |
1037 | if (ret < 0) | |
1da177e4 | 1038 | return ret; |
04e482ff GKH |
1039 | ret = checkintf(ps, ret); |
1040 | if (ret) | |
1da177e4 | 1041 | return ret; |
3444b26a | 1042 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1043 | return 0; |
1044 | } | |
1045 | ||
1046 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
1047 | { | |
1048 | unsigned int ep; | |
1049 | int pipe; | |
1050 | int ret; | |
1051 | ||
1052 | if (get_user(ep, (unsigned int __user *)arg)) | |
1053 | return -EFAULT; | |
04e482ff GKH |
1054 | ret = findintfep(ps->dev, ep); |
1055 | if (ret < 0) | |
1da177e4 | 1056 | return ret; |
04e482ff GKH |
1057 | ret = checkintf(ps, ret); |
1058 | if (ret) | |
1da177e4 LT |
1059 | return ret; |
1060 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
1061 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1062 | else | |
1063 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1064 | |
1065 | return usb_clear_halt(ps->dev, pipe); | |
1066 | } | |
1da177e4 LT |
1067 | |
1068 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
1069 | { | |
1070 | struct usbdevfs_getdriver gd; | |
1071 | struct usb_interface *intf; | |
1072 | int ret; | |
1073 | ||
1074 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1075 | return -EFAULT; | |
1da177e4 LT |
1076 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1077 | if (!intf || !intf->dev.driver) | |
1078 | ret = -ENODATA; | |
1079 | else { | |
1080 | strncpy(gd.driver, intf->dev.driver->name, | |
1081 | sizeof(gd.driver)); | |
1082 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1083 | } | |
1da177e4 LT |
1084 | return ret; |
1085 | } | |
1086 | ||
1087 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
1088 | { | |
886ccd45 VK |
1089 | struct usbdevfs_connectinfo ci = { |
1090 | .devnum = ps->dev->devnum, | |
1091 | .slow = ps->dev->speed == USB_SPEED_LOW | |
1092 | }; | |
1da177e4 | 1093 | |
1da177e4 LT |
1094 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1095 | return -EFAULT; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int proc_resetdevice(struct dev_state *ps) | |
1100 | { | |
742120c6 | 1101 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1102 | } |
1103 | ||
1104 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
1105 | { | |
1106 | struct usbdevfs_setinterface setintf; | |
1107 | int ret; | |
1108 | ||
1109 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1110 | return -EFAULT; | |
1111 | if ((ret = checkintf(ps, setintf.interface))) | |
1112 | return ret; | |
1113 | return usb_set_interface(ps->dev, setintf.interface, | |
1114 | setintf.altsetting); | |
1115 | } | |
1116 | ||
1117 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
1118 | { | |
3f141e2a | 1119 | int u; |
1da177e4 | 1120 | int status = 0; |
04e482ff | 1121 | struct usb_host_config *actconfig; |
1da177e4 | 1122 | |
3f141e2a | 1123 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1124 | return -EFAULT; |
1125 | ||
04e482ff GKH |
1126 | actconfig = ps->dev->actconfig; |
1127 | ||
1128 | /* Don't touch the device if any interfaces are claimed. | |
1129 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1130 | * an interface is claimed by usbfs it could easily deadlock. |
1131 | */ | |
04e482ff GKH |
1132 | if (actconfig) { |
1133 | int i; | |
1134 | ||
1135 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1136 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1137 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1138 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1139 | "while '%s' sets config #%d\n", |
1140 | actconfig->interface[i] | |
1141 | ->cur_altsetting | |
1142 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1143 | actconfig->interface[i] |
1144 | ->dev.driver->name, | |
1da177e4 | 1145 | current->comm, u); |
04e482ff | 1146 | status = -EBUSY; |
1da177e4 | 1147 | break; |
1da177e4 | 1148 | } |
04e482ff GKH |
1149 | } |
1150 | } | |
1da177e4 LT |
1151 | |
1152 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1153 | * so avoid usb_set_configuration()'s kick to sysfs | |
1154 | */ | |
1155 | if (status == 0) { | |
1156 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1157 | status = usb_reset_configuration(ps->dev); | |
1158 | else | |
1159 | status = usb_set_configuration(ps->dev, u); | |
1160 | } | |
1161 | ||
1162 | return status; | |
1163 | } | |
1164 | ||
1da177e4 | 1165 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1166 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1167 | void __user *arg) | |
1da177e4 LT |
1168 | { |
1169 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1170 | struct usb_host_endpoint *ep; | |
52fb743d | 1171 | struct async *as = NULL; |
1da177e4 LT |
1172 | struct usb_ctrlrequest *dr = NULL; |
1173 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 HG |
1174 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
1175 | void *buf; | |
1da177e4 | 1176 | |
14722ef4 AS |
1177 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1178 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1179 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1180 | USBDEVFS_URB_NO_FSBR | |
1181 | USBDEVFS_URB_ZERO_PACKET | | |
1182 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1183 | return -EINVAL; |
9180135b | 1184 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1185 | return -EINVAL; |
04e482ff GKH |
1186 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1187 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1188 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1189 | if (ifnum < 0) | |
1da177e4 | 1190 | return ifnum; |
04e482ff GKH |
1191 | ret = checkintf(ps, ifnum); |
1192 | if (ret) | |
1da177e4 LT |
1193 | return ret; |
1194 | } | |
93cf9b90 AS |
1195 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1196 | is_in = 1; | |
1197 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1198 | } else { | |
1199 | is_in = 0; | |
1200 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1201 | } | |
1da177e4 LT |
1202 | if (!ep) |
1203 | return -ENOENT; | |
add1aaea AS |
1204 | |
1205 | u = 0; | |
1da177e4 LT |
1206 | switch(uurb->type) { |
1207 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1208 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1209 | return -EINVAL; |
add1aaea AS |
1210 | /* min 8 byte setup packet */ |
1211 | if (uurb->buffer_length < 8) | |
1da177e4 | 1212 | return -EINVAL; |
04e482ff GKH |
1213 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1214 | if (!dr) | |
1da177e4 LT |
1215 | return -ENOMEM; |
1216 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1217 | ret = -EFAULT; |
1218 | goto error; | |
1da177e4 LT |
1219 | } |
1220 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1221 | ret = -EINVAL; |
1222 | goto error; | |
1da177e4 | 1223 | } |
393cbb51 | 1224 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1225 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1226 | if (ret) |
1227 | goto error; | |
1da177e4 LT |
1228 | uurb->number_of_packets = 0; |
1229 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1230 | uurb->buffer += 8; | |
93cf9b90 AS |
1231 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1232 | is_in = 1; | |
1233 | uurb->endpoint |= USB_DIR_IN; | |
1234 | } else { | |
1235 | is_in = 0; | |
1236 | uurb->endpoint &= ~USB_DIR_IN; | |
1237 | } | |
0880aef4 CF |
1238 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1239 | "bRequest=%02x wValue=%04x " | |
1240 | "wIndex=%04x wLength=%04x\n", | |
1241 | dr->bRequestType, dr->bRequest, | |
1242 | __le16_to_cpup(&dr->wValue), | |
1243 | __le16_to_cpup(&dr->wIndex), | |
1244 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1245 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1246 | break; |
1247 | ||
1248 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1249 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1250 | case USB_ENDPOINT_XFER_CONTROL: |
1251 | case USB_ENDPOINT_XFER_ISOC: | |
1252 | return -EINVAL; | |
f661c6f8 AS |
1253 | case USB_ENDPOINT_XFER_INT: |
1254 | /* allow single-shot interrupt transfers */ | |
1255 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1256 | goto interrupt_urb; | |
1da177e4 LT |
1257 | } |
1258 | uurb->number_of_packets = 0; | |
3d97ff63 HG |
1259 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1260 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1261 | num_sgs = 0; | |
1da177e4 LT |
1262 | break; |
1263 | ||
f661c6f8 AS |
1264 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1265 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1266 | return -EINVAL; | |
1267 | interrupt_urb: | |
1268 | uurb->number_of_packets = 0; | |
f661c6f8 AS |
1269 | break; |
1270 | ||
1da177e4 LT |
1271 | case USBDEVFS_URB_TYPE_ISO: |
1272 | /* arbitrary limit */ | |
04e482ff GKH |
1273 | if (uurb->number_of_packets < 1 || |
1274 | uurb->number_of_packets > 128) | |
1da177e4 | 1275 | return -EINVAL; |
93cf9b90 | 1276 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1277 | return -EINVAL; |
04e482ff GKH |
1278 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1279 | uurb->number_of_packets; | |
1da177e4 LT |
1280 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1281 | return -ENOMEM; | |
1282 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
52fb743d AS |
1283 | ret = -EFAULT; |
1284 | goto error; | |
1da177e4 LT |
1285 | } |
1286 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1287 | /* arbitrary limit, |
1288 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1289 | if (isopkt[u].length > 8192) { |
52fb743d AS |
1290 | ret = -EINVAL; |
1291 | goto error; | |
1da177e4 LT |
1292 | } |
1293 | totlen += isopkt[u].length; | |
1294 | } | |
add1aaea | 1295 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1296 | uurb->buffer_length = totlen; |
1297 | break; | |
1298 | ||
1da177e4 LT |
1299 | default: |
1300 | return -EINVAL; | |
1301 | } | |
add1aaea | 1302 | |
3f5eb8d5 | 1303 | if (uurb->buffer_length >= USBFS_XFER_MAX) { |
add1aaea AS |
1304 | ret = -EINVAL; |
1305 | goto error; | |
1306 | } | |
9180135b AS |
1307 | if (uurb->buffer_length > 0 && |
1308 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1309 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1310 | ret = -EFAULT; |
1311 | goto error; | |
1da177e4 | 1312 | } |
9180135b AS |
1313 | as = alloc_async(uurb->number_of_packets); |
1314 | if (!as) { | |
52fb743d AS |
1315 | ret = -ENOMEM; |
1316 | goto error; | |
1da177e4 | 1317 | } |
3d97ff63 HG |
1318 | |
1319 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + | |
1320 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1321 | ret = usbfs_increase_memory_usage(u); |
1322 | if (ret) | |
1323 | goto error; | |
1324 | as->mem_usage = u; | |
1325 | ||
3d97ff63 HG |
1326 | if (num_sgs) { |
1327 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1328 | GFP_KERNEL); | |
1329 | if (!as->urb->sg) { | |
1330 | ret = -ENOMEM; | |
1331 | goto error; | |
1332 | } | |
1333 | as->urb->num_sgs = num_sgs; | |
1334 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1335 | ||
1336 | totlen = uurb->buffer_length; | |
1337 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1338 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1339 | buf = kmalloc(u, GFP_KERNEL); | |
1340 | if (!buf) { | |
1341 | ret = -ENOMEM; | |
1342 | goto error; | |
1343 | } | |
1344 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1345 | ||
1346 | if (!is_in) { | |
1347 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1348 | ret = -EFAULT; | |
1349 | goto error; | |
1350 | } | |
01463900 | 1351 | uurb->buffer += u; |
3d97ff63 HG |
1352 | } |
1353 | totlen -= u; | |
1354 | } | |
1355 | } else if (uurb->buffer_length > 0) { | |
9180135b AS |
1356 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, |
1357 | GFP_KERNEL); | |
1358 | if (!as->urb->transfer_buffer) { | |
52fb743d AS |
1359 | ret = -ENOMEM; |
1360 | goto error; | |
9180135b | 1361 | } |
3d97ff63 HG |
1362 | |
1363 | if (!is_in) { | |
1364 | if (copy_from_user(as->urb->transfer_buffer, | |
1365 | uurb->buffer, | |
1366 | uurb->buffer_length)) { | |
1367 | ret = -EFAULT; | |
1368 | goto error; | |
1369 | } | |
1370 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1371 | /* | |
1372 | * Isochronous input data may end up being | |
1373 | * discontiguous if some of the packets are short. | |
1374 | * Clear the buffer so that the gaps don't leak | |
1375 | * kernel data to userspace. | |
1376 | */ | |
7152b592 AS |
1377 | memset(as->urb->transfer_buffer, 0, |
1378 | uurb->buffer_length); | |
3d97ff63 | 1379 | } |
9180135b | 1380 | } |
04e482ff GKH |
1381 | as->urb->dev = ps->dev; |
1382 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1383 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1384 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1385 | |
1386 | /* This tedious sequence is necessary because the URB_* flags | |
1387 | * are internal to the kernel and subject to change, whereas | |
1388 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1389 | */ | |
1390 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1391 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1392 | u |= URB_ISO_ASAP; | |
1393 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1394 | u |= URB_SHORT_NOT_OK; | |
1395 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1396 | u |= URB_NO_FSBR; | |
1397 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1398 | u |= URB_ZERO_PACKET; | |
1399 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1400 | u |= URB_NO_INTERRUPT; | |
1401 | as->urb->transfer_flags = u; | |
1402 | ||
1da177e4 | 1403 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1404 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1405 | dr = NULL; |
1da177e4 LT |
1406 | as->urb->start_frame = uurb->start_frame; |
1407 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1408 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1409 | ps->dev->speed == USB_SPEED_HIGH) | |
1410 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1411 | else | |
1412 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1413 | as->urb->context = as; |
1414 | as->urb->complete = async_completed; | |
1da177e4 LT |
1415 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1416 | as->urb->iso_frame_desc[u].offset = totlen; | |
1417 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1418 | totlen += isopkt[u].length; | |
1419 | } | |
6fd19f4b | 1420 | kfree(isopkt); |
52fb743d | 1421 | isopkt = NULL; |
1da177e4 | 1422 | as->ps = ps; |
04e482ff | 1423 | as->userurb = arg; |
9180135b | 1424 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1425 | as->userbuffer = uurb->buffer; |
1426 | else | |
1427 | as->userbuffer = NULL; | |
1428 | as->signr = uurb->signr; | |
1429 | as->ifnum = ifnum; | |
2425c08b | 1430 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1431 | as->cred = get_current_cred(); |
7a01955f | 1432 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1433 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1434 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1435 | NULL, 0); |
1436 | if (!is_in) | |
1437 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1438 | ||
04e482ff | 1439 | async_newpending(as); |
01c6460f AS |
1440 | |
1441 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1442 | spin_lock_irq(&ps->lock); | |
1443 | ||
1444 | /* Not exactly the endpoint address; the direction bit is | |
1445 | * shifted to the 0x10 position so that the value will be | |
1446 | * between 0 and 31. | |
1447 | */ | |
1448 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1449 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1450 | >> 3); | |
1451 | ||
1452 | /* If this bulk URB is the start of a new transfer, re-enable | |
1453 | * the endpoint. Otherwise mark it as a continuation URB. | |
1454 | */ | |
1455 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1456 | as->bulk_status = AS_CONTINUATION; | |
1457 | else | |
1458 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1459 | ||
1460 | /* Don't accept continuation URBs if the endpoint is | |
1461 | * disabled because of an earlier error. | |
1462 | */ | |
1463 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1464 | ret = -EREMOTEIO; | |
1465 | else | |
1466 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1467 | spin_unlock_irq(&ps->lock); | |
1468 | } else { | |
1469 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1470 | } | |
1471 | ||
1472 | if (ret) { | |
04e482ff GKH |
1473 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1474 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1475 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1476 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1477 | async_removepending(as); |
52fb743d | 1478 | goto error; |
04e482ff GKH |
1479 | } |
1480 | return 0; | |
52fb743d AS |
1481 | |
1482 | error: | |
1483 | kfree(isopkt); | |
1484 | kfree(dr); | |
1485 | if (as) | |
1486 | free_async(as); | |
1487 | return ret; | |
1da177e4 LT |
1488 | } |
1489 | ||
1490 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1491 | { | |
1492 | struct usbdevfs_urb uurb; | |
1493 | ||
1494 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1495 | return -EFAULT; | |
1496 | ||
04e482ff GKH |
1497 | return proc_do_submiturb(ps, &uurb, |
1498 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1499 | arg); | |
1da177e4 LT |
1500 | } |
1501 | ||
1502 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1503 | { | |
4e09dcf2 | 1504 | struct urb *urb; |
1da177e4 | 1505 | struct async *as; |
4e09dcf2 | 1506 | unsigned long flags; |
1da177e4 | 1507 | |
4e09dcf2 | 1508 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1509 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1510 | if (!as) { |
1511 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1512 | return -EINVAL; |
4e09dcf2 HL |
1513 | } |
1514 | ||
1515 | urb = as->urb; | |
1516 | usb_get_urb(urb); | |
1517 | spin_unlock_irqrestore(&ps->lock, flags); | |
1518 | ||
1519 | usb_kill_urb(urb); | |
1520 | usb_put_urb(urb); | |
1521 | ||
1da177e4 LT |
1522 | return 0; |
1523 | } | |
1524 | ||
1525 | static int processcompl(struct async *as, void __user * __user *arg) | |
1526 | { | |
1527 | struct urb *urb = as->urb; | |
1528 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1529 | void __user *addr = as->userurb; | |
1530 | unsigned int i; | |
1531 | ||
7152b592 | 1532 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1533 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1534 | goto err_out; |
7152b592 | 1535 | } |
e015268d | 1536 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1537 | goto err_out; |
1da177e4 | 1538 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1539 | goto err_out; |
1da177e4 | 1540 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1541 | goto err_out; |
1da177e4 | 1542 | |
93cf9b90 | 1543 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1544 | for (i = 0; i < urb->number_of_packets; i++) { |
1545 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1546 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1547 | goto err_out; |
668a9541 CL |
1548 | if (put_user(urb->iso_frame_desc[i].status, |
1549 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1550 | goto err_out; |
668a9541 | 1551 | } |
1da177e4 LT |
1552 | } |
1553 | ||
1da177e4 LT |
1554 | if (put_user(addr, (void __user * __user *)arg)) |
1555 | return -EFAULT; | |
1556 | return 0; | |
d794a021 ON |
1557 | |
1558 | err_out: | |
d794a021 | 1559 | return -EFAULT; |
1da177e4 LT |
1560 | } |
1561 | ||
04e482ff | 1562 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1563 | { |
04e482ff | 1564 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1565 | struct async *as = NULL; |
1566 | struct usb_device *dev = ps->dev; | |
1567 | ||
1568 | add_wait_queue(&ps->wait, &wait); | |
1569 | for (;;) { | |
1570 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1571 | as = async_getcompleted(ps); |
1572 | if (as) | |
1da177e4 LT |
1573 | break; |
1574 | if (signal_pending(current)) | |
1575 | break; | |
1576 | usb_unlock_device(dev); | |
1577 | schedule(); | |
1578 | usb_lock_device(dev); | |
1579 | } | |
1580 | remove_wait_queue(&ps->wait, &wait); | |
1581 | set_current_state(TASK_RUNNING); | |
1582 | return as; | |
1583 | } | |
1584 | ||
1585 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1586 | { | |
1587 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1588 | if (as) { |
1589 | int retval = processcompl(as, (void __user * __user *)arg); | |
1590 | free_async(as); | |
1591 | return retval; | |
1592 | } | |
1da177e4 LT |
1593 | if (signal_pending(current)) |
1594 | return -EINTR; | |
1595 | return -EIO; | |
1596 | } | |
1597 | ||
1598 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1599 | { | |
ddeee0b2 | 1600 | int retval; |
1da177e4 LT |
1601 | struct async *as; |
1602 | ||
ddeee0b2 LT |
1603 | as = async_getcompleted(ps); |
1604 | retval = -EAGAIN; | |
1605 | if (as) { | |
1606 | retval = processcompl(as, (void __user * __user *)arg); | |
1607 | free_async(as); | |
1608 | } | |
1609 | return retval; | |
1da177e4 LT |
1610 | } |
1611 | ||
1612 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1613 | static int proc_control_compat(struct dev_state *ps, |
1614 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1615 | { | |
1616 | struct usbdevfs_ctrltransfer __user *p; | |
1617 | __u32 udata; | |
1618 | p = compat_alloc_user_space(sizeof(*p)); | |
1619 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1620 | get_user(udata, &p32->data) || | |
1621 | put_user(compat_ptr(udata), &p->data)) | |
1622 | return -EFAULT; | |
1623 | return proc_control(ps, p); | |
1624 | } | |
1625 | ||
1626 | static int proc_bulk_compat(struct dev_state *ps, | |
1627 | struct usbdevfs_bulktransfer32 __user *p32) | |
1628 | { | |
1629 | struct usbdevfs_bulktransfer __user *p; | |
1630 | compat_uint_t n; | |
1631 | compat_caddr_t addr; | |
1632 | ||
1633 | p = compat_alloc_user_space(sizeof(*p)); | |
1634 | ||
1635 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1636 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1637 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1638 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1639 | return -EFAULT; | |
1640 | ||
1641 | return proc_bulk(ps, p); | |
1642 | } | |
1643 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1644 | { | |
1645 | struct usbdevfs_disconnectsignal32 ds; | |
1646 | ||
1647 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1648 | return -EFAULT; | |
1649 | ps->discsignr = ds.signr; | |
1650 | ps->disccontext = compat_ptr(ds.context); | |
1651 | return 0; | |
1652 | } | |
1da177e4 LT |
1653 | |
1654 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1655 | struct usbdevfs_urb32 __user *uurb) | |
1656 | { | |
1657 | __u32 uptr; | |
18753ebc MB |
1658 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1659 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1660 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1661 | __get_user(kurb->status, &uurb->status) || | |
1662 | __get_user(kurb->flags, &uurb->flags) || | |
1663 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1664 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1665 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1666 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1667 | __get_user(kurb->error_count, &uurb->error_count) || | |
1668 | __get_user(kurb->signr, &uurb->signr)) | |
1669 | return -EFAULT; | |
1670 | ||
1671 | if (__get_user(uptr, &uurb->buffer)) | |
1672 | return -EFAULT; | |
1673 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1674 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1675 | return -EFAULT; |
1676 | kurb->usercontext = compat_ptr(uptr); | |
1677 | ||
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1682 | { | |
1683 | struct usbdevfs_urb uurb; | |
1684 | ||
04e482ff | 1685 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1686 | return -EFAULT; |
1687 | ||
04e482ff GKH |
1688 | return proc_do_submiturb(ps, &uurb, |
1689 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1690 | arg); | |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1694 | { | |
1695 | struct urb *urb = as->urb; | |
1696 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1697 | void __user *addr = as->userurb; | |
1698 | unsigned int i; | |
1699 | ||
2102e06a | 1700 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1701 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 1702 | return -EFAULT; |
2102e06a | 1703 | } |
e015268d | 1704 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1705 | return -EFAULT; |
1706 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1707 | return -EFAULT; | |
1708 | if (put_user(urb->error_count, &userurb->error_count)) | |
1709 | return -EFAULT; | |
1710 | ||
93cf9b90 | 1711 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1712 | for (i = 0; i < urb->number_of_packets; i++) { |
1713 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1714 | &userurb->iso_frame_desc[i].actual_length)) | |
1715 | return -EFAULT; | |
1716 | if (put_user(urb->iso_frame_desc[i].status, | |
1717 | &userurb->iso_frame_desc[i].status)) | |
1718 | return -EFAULT; | |
1719 | } | |
1da177e4 LT |
1720 | } |
1721 | ||
c714de5d | 1722 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1723 | return -EFAULT; |
1724 | return 0; | |
1725 | } | |
1726 | ||
1727 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1728 | { | |
1729 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1730 | if (as) { |
1731 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1732 | free_async(as); | |
1733 | return retval; | |
1734 | } | |
1da177e4 LT |
1735 | if (signal_pending(current)) |
1736 | return -EINTR; | |
1737 | return -EIO; | |
1738 | } | |
1739 | ||
1740 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1741 | { | |
ddeee0b2 | 1742 | int retval; |
1da177e4 LT |
1743 | struct async *as; |
1744 | ||
ddeee0b2 LT |
1745 | retval = -EAGAIN; |
1746 | as = async_getcompleted(ps); | |
1747 | if (as) { | |
1748 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1749 | free_async(as); | |
1750 | } | |
1751 | return retval; | |
1da177e4 LT |
1752 | } |
1753 | ||
637e8a60 | 1754 | |
1da177e4 LT |
1755 | #endif |
1756 | ||
1757 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1758 | { | |
1759 | struct usbdevfs_disconnectsignal ds; | |
1760 | ||
1761 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1762 | return -EFAULT; | |
1da177e4 LT |
1763 | ps->discsignr = ds.signr; |
1764 | ps->disccontext = ds.context; | |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1769 | { | |
1770 | unsigned int ifnum; | |
1771 | ||
1772 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1773 | return -EFAULT; | |
1774 | return claimintf(ps, ifnum); | |
1775 | } | |
1776 | ||
1777 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1778 | { | |
1779 | unsigned int ifnum; | |
1780 | int ret; | |
1781 | ||
1782 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1783 | return -EFAULT; | |
1784 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1785 | return ret; | |
1786 | destroy_async_on_interface (ps, ifnum); | |
1787 | return 0; | |
1788 | } | |
1789 | ||
c36fc889 | 1790 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1791 | { |
1da177e4 LT |
1792 | int size; |
1793 | void *buf = NULL; | |
1794 | int retval = 0; | |
1795 | struct usb_interface *intf = NULL; | |
1796 | struct usb_driver *driver = NULL; | |
1da177e4 | 1797 | |
c36fc889 | 1798 | /* alloc buffer */ |
04e482ff GKH |
1799 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1800 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1801 | return -ENOMEM; |
c36fc889 | 1802 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1803 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1804 | kfree(buf); |
1da177e4 LT |
1805 | return -EFAULT; |
1806 | } | |
1807 | } else { | |
04e482ff | 1808 | memset(buf, 0, size); |
1da177e4 LT |
1809 | } |
1810 | } | |
1811 | ||
349710c3 | 1812 | if (!connected(ps)) { |
6fd19f4b | 1813 | kfree(buf); |
1da177e4 LT |
1814 | return -ENODEV; |
1815 | } | |
1816 | ||
1817 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1818 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1819 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1820 | retval = -EINVAL; | |
c36fc889 | 1821 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1822 | |
1823 | /* disconnect kernel driver from interface */ | |
1824 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1825 | if (intf->dev.driver) { |
1826 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1827 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1828 | usb_driver_release_interface(driver, intf); |
1829 | } else | |
1830 | retval = -ENODATA; | |
1da177e4 LT |
1831 | break; |
1832 | ||
1833 | /* let kernel drivers try to (re)bind to the interface */ | |
1834 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1835 | if (!intf->dev.driver) |
1836 | retval = device_attach(&intf->dev); | |
1837 | else | |
1838 | retval = -EBUSY; | |
1da177e4 LT |
1839 | break; |
1840 | ||
1841 | /* talk directly to the interface's driver */ | |
1842 | default: | |
1da177e4 LT |
1843 | if (intf->dev.driver) |
1844 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 1845 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
1846 | retval = -ENOTTY; |
1847 | } else { | |
c532b29a | 1848 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1849 | if (retval == -ENOIOCTLCMD) |
1850 | retval = -ENOTTY; | |
1851 | } | |
1da177e4 LT |
1852 | } |
1853 | ||
1854 | /* cleanup and return */ | |
1855 | if (retval >= 0 | |
04e482ff | 1856 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1857 | && size > 0 |
04e482ff | 1858 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1859 | retval = -EFAULT; |
6fd19f4b JJ |
1860 | |
1861 | kfree(buf); | |
1da177e4 LT |
1862 | return retval; |
1863 | } | |
1864 | ||
c36fc889 PZ |
1865 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1866 | { | |
1867 | struct usbdevfs_ioctl ctrl; | |
1868 | ||
04e482ff | 1869 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1870 | return -EFAULT; |
1871 | return proc_ioctl(ps, &ctrl); | |
1872 | } | |
1873 | ||
1874 | #ifdef CONFIG_COMPAT | |
777da590 | 1875 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1876 | { |
1877 | struct usbdevfs_ioctl32 __user *uioc; | |
1878 | struct usbdevfs_ioctl ctrl; | |
1879 | u32 udata; | |
1880 | ||
058120d7 | 1881 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1882 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1883 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1884 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1885 | __get_user(udata, &uioc->data)) |
1886 | return -EFAULT; | |
1887 | ctrl.data = compat_ptr(udata); | |
1888 | ||
1889 | return proc_ioctl(ps, &ctrl); | |
1890 | } | |
1891 | #endif | |
1892 | ||
7cbe5dca AS |
1893 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1894 | { | |
1895 | unsigned portnum; | |
1896 | int rc; | |
1897 | ||
1898 | if (get_user(portnum, (unsigned __user *) arg)) | |
1899 | return -EFAULT; | |
1900 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1901 | if (rc == 0) | |
1902 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1903 | portnum, task_pid_nr(current), current->comm); | |
1904 | return rc; | |
1905 | } | |
1906 | ||
1907 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1908 | { | |
1909 | unsigned portnum; | |
1910 | ||
1911 | if (get_user(portnum, (unsigned __user *) arg)) | |
1912 | return -EFAULT; | |
1913 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1914 | } | |
1915 | ||
19181bc5 HG |
1916 | static int proc_get_capabilities(struct dev_state *ps, void __user *arg) |
1917 | { | |
1918 | __u32 caps; | |
1919 | ||
1920 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM; | |
1921 | if (!ps->dev->bus->no_stop_on_short) | |
1922 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
1923 | if (ps->dev->bus->sg_tablesize) |
1924 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
1925 | |
1926 | if (put_user(caps, (__u32 __user *)arg)) | |
1927 | return -EFAULT; | |
1928 | ||
1929 | return 0; | |
1930 | } | |
1931 | ||
0837e7e5 HG |
1932 | static int proc_disconnect_claim(struct dev_state *ps, void __user *arg) |
1933 | { | |
1934 | struct usbdevfs_disconnect_claim dc; | |
1935 | struct usb_interface *intf; | |
1936 | ||
1937 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
1938 | return -EFAULT; | |
1939 | ||
1940 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
1941 | if (!intf) | |
1942 | return -EINVAL; | |
1943 | ||
1944 | if (intf->dev.driver) { | |
1945 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
1946 | ||
1947 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && | |
1948 | strncmp(dc.driver, intf->dev.driver->name, | |
1949 | sizeof(dc.driver)) != 0) | |
1950 | return -EBUSY; | |
1951 | ||
1952 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
1953 | strncmp(dc.driver, intf->dev.driver->name, | |
1954 | sizeof(dc.driver)) == 0) | |
1955 | return -EBUSY; | |
1956 | ||
1957 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
1958 | usb_driver_release_interface(driver, intf); | |
1959 | } | |
1960 | ||
1961 | return claimintf(ps, dc.interface); | |
1962 | } | |
1963 | ||
1da177e4 LT |
1964 | /* |
1965 | * NOTE: All requests here that have interface numbers as parameters | |
1966 | * are assuming that somehow the configuration has been prevented from | |
1967 | * changing. But there's no mechanism to ensure that... | |
1968 | */ | |
637e8a60 AB |
1969 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1970 | void __user *p) | |
1da177e4 | 1971 | { |
ec17cf1c | 1972 | struct dev_state *ps = file->private_data; |
496ad9aa | 1973 | struct inode *inode = file_inode(file); |
1da177e4 | 1974 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1975 | int ret = -ENOTTY; |
1976 | ||
1977 | if (!(file->f_mode & FMODE_WRITE)) | |
1978 | return -EPERM; | |
01412a21 | 1979 | |
1da177e4 | 1980 | usb_lock_device(dev); |
349710c3 | 1981 | if (!connected(ps)) { |
1da177e4 LT |
1982 | usb_unlock_device(dev); |
1983 | return -ENODEV; | |
1984 | } | |
1985 | ||
1986 | switch (cmd) { | |
1987 | case USBDEVFS_CONTROL: | |
441b62c1 | 1988 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1989 | ret = proc_control(ps, p); |
1990 | if (ret >= 0) | |
1991 | inode->i_mtime = CURRENT_TIME; | |
1992 | break; | |
1993 | ||
1994 | case USBDEVFS_BULK: | |
441b62c1 | 1995 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1996 | ret = proc_bulk(ps, p); |
1997 | if (ret >= 0) | |
1998 | inode->i_mtime = CURRENT_TIME; | |
1999 | break; | |
2000 | ||
2001 | case USBDEVFS_RESETEP: | |
441b62c1 | 2002 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2003 | ret = proc_resetep(ps, p); |
2004 | if (ret >= 0) | |
2005 | inode->i_mtime = CURRENT_TIME; | |
2006 | break; | |
2007 | ||
2008 | case USBDEVFS_RESET: | |
441b62c1 | 2009 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2010 | ret = proc_resetdevice(ps); |
2011 | break; | |
2012 | ||
2013 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2014 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2015 | ret = proc_clearhalt(ps, p); |
2016 | if (ret >= 0) | |
2017 | inode->i_mtime = CURRENT_TIME; | |
2018 | break; | |
2019 | ||
2020 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2021 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2022 | ret = proc_getdriver(ps, p); |
2023 | break; | |
2024 | ||
2025 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2026 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2027 | ret = proc_connectinfo(ps, p); |
2028 | break; | |
2029 | ||
2030 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2031 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2032 | ret = proc_setintf(ps, p); |
2033 | break; | |
2034 | ||
2035 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2036 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2037 | ret = proc_setconfig(ps, p); |
2038 | break; | |
2039 | ||
2040 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2041 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2042 | ret = proc_submiturb(ps, p); |
2043 | if (ret >= 0) | |
2044 | inode->i_mtime = CURRENT_TIME; | |
2045 | break; | |
2046 | ||
2047 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2048 | case USBDEVFS_CONTROL32: |
2049 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2050 | ret = proc_control_compat(ps, p); | |
2051 | if (ret >= 0) | |
2052 | inode->i_mtime = CURRENT_TIME; | |
2053 | break; | |
2054 | ||
2055 | case USBDEVFS_BULK32: | |
2056 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2057 | ret = proc_bulk_compat(ps, p); | |
2058 | if (ret >= 0) | |
2059 | inode->i_mtime = CURRENT_TIME; | |
2060 | break; | |
2061 | ||
2062 | case USBDEVFS_DISCSIGNAL32: | |
2063 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2064 | ret = proc_disconnectsignal_compat(ps, p); | |
2065 | break; | |
1da177e4 LT |
2066 | |
2067 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2068 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2069 | ret = proc_submiturb_compat(ps, p); |
2070 | if (ret >= 0) | |
2071 | inode->i_mtime = CURRENT_TIME; | |
2072 | break; | |
2073 | ||
2074 | case USBDEVFS_REAPURB32: | |
441b62c1 | 2075 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
2076 | ret = proc_reapurb_compat(ps, p); |
2077 | break; | |
2078 | ||
2079 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 2080 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
2081 | ret = proc_reapurbnonblock_compat(ps, p); |
2082 | break; | |
2083 | ||
c36fc889 | 2084 | case USBDEVFS_IOCTL32: |
637e8a60 | 2085 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2086 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2087 | break; |
1da177e4 LT |
2088 | #endif |
2089 | ||
2090 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 2091 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
2092 | ret = proc_unlinkurb(ps, p); |
2093 | break; | |
2094 | ||
2095 | case USBDEVFS_REAPURB: | |
441b62c1 | 2096 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
2097 | ret = proc_reapurb(ps, p); |
2098 | break; | |
2099 | ||
2100 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 2101 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
2102 | ret = proc_reapurbnonblock(ps, p); |
2103 | break; | |
2104 | ||
2105 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 2106 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2107 | ret = proc_disconnectsignal(ps, p); |
2108 | break; | |
2109 | ||
2110 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2111 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2112 | ret = proc_claiminterface(ps, p); |
2113 | break; | |
2114 | ||
2115 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2116 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2117 | ret = proc_releaseinterface(ps, p); |
2118 | break; | |
2119 | ||
2120 | case USBDEVFS_IOCTL: | |
441b62c1 | 2121 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2122 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2123 | break; |
7cbe5dca AS |
2124 | |
2125 | case USBDEVFS_CLAIM_PORT: | |
2126 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2127 | ret = proc_claim_port(ps, p); | |
2128 | break; | |
2129 | ||
2130 | case USBDEVFS_RELEASE_PORT: | |
2131 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2132 | ret = proc_release_port(ps, p); | |
2133 | break; | |
19181bc5 HG |
2134 | case USBDEVFS_GET_CAPABILITIES: |
2135 | ret = proc_get_capabilities(ps, p); | |
2136 | break; | |
0837e7e5 HG |
2137 | case USBDEVFS_DISCONNECT_CLAIM: |
2138 | ret = proc_disconnect_claim(ps, p); | |
2139 | break; | |
1da177e4 LT |
2140 | } |
2141 | usb_unlock_device(dev); | |
2142 | if (ret >= 0) | |
2143 | inode->i_atime = CURRENT_TIME; | |
2144 | return ret; | |
2145 | } | |
2146 | ||
637e8a60 AB |
2147 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2148 | unsigned long arg) | |
2149 | { | |
2150 | int ret; | |
2151 | ||
637e8a60 | 2152 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2153 | |
2154 | return ret; | |
2155 | } | |
2156 | ||
2157 | #ifdef CONFIG_COMPAT | |
2158 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2159 | unsigned long arg) | |
2160 | { | |
2161 | int ret; | |
2162 | ||
637e8a60 | 2163 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2164 | |
2165 | return ret; | |
2166 | } | |
2167 | #endif | |
2168 | ||
1da177e4 | 2169 | /* No kernel lock - fine */ |
04e482ff GKH |
2170 | static unsigned int usbdev_poll(struct file *file, |
2171 | struct poll_table_struct *wait) | |
1da177e4 | 2172 | { |
ec17cf1c TK |
2173 | struct dev_state *ps = file->private_data; |
2174 | unsigned int mask = 0; | |
1da177e4 LT |
2175 | |
2176 | poll_wait(file, &ps->wait, wait); | |
2177 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2178 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2179 | if (!connected(ps)) |
1da177e4 LT |
2180 | mask |= POLLERR | POLLHUP; |
2181 | return mask; | |
2182 | } | |
2183 | ||
9f8b17e6 | 2184 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
2185 | .owner = THIS_MODULE, |
2186 | .llseek = usbdev_lseek, | |
2187 | .read = usbdev_read, | |
2188 | .poll = usbdev_poll, | |
2189 | .unlocked_ioctl = usbdev_ioctl, | |
2190 | #ifdef CONFIG_COMPAT | |
2191 | .compat_ioctl = usbdev_compat_ioctl, | |
2192 | #endif | |
2193 | .open = usbdev_open, | |
2194 | .release = usbdev_release, | |
1da177e4 | 2195 | }; |
fbf82fd2 | 2196 | |
501950d8 | 2197 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
2198 | { |
2199 | struct dev_state *ps; | |
2200 | struct siginfo sinfo; | |
2201 | ||
2202 | while (!list_empty(&udev->filelist)) { | |
2203 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
2204 | destroy_all_async(ps); | |
2205 | wake_up_all(&ps->wait); | |
2206 | list_del_init(&ps->list); | |
2207 | if (ps->discsignr) { | |
2208 | sinfo.si_signo = ps->discsignr; | |
2209 | sinfo.si_errno = EPIPE; | |
2210 | sinfo.si_code = SI_ASYNCIO; | |
2211 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2212 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2213 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2214 | } |
2215 | } | |
2216 | } | |
2217 | ||
501950d8 | 2218 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2219 | unsigned long action, void *dev) |
a7b986b3 GKH |
2220 | { |
2221 | switch (action) { | |
2222 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2223 | break; |
2224 | case USB_DEVICE_REMOVE: | |
501950d8 | 2225 | usbdev_remove(dev); |
a7b986b3 GKH |
2226 | break; |
2227 | } | |
2228 | return NOTIFY_OK; | |
2229 | } | |
2230 | ||
2231 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2232 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2233 | }; |
2234 | ||
7e7654a9 | 2235 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2236 | |
9f8b17e6 | 2237 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2238 | { |
2239 | int retval; | |
2240 | ||
fad21bdf | 2241 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2242 | "usb_device"); |
fbf82fd2 | 2243 | if (retval) { |
69a85942 | 2244 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2245 | goto out; |
2246 | } | |
9f8b17e6 | 2247 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2248 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2249 | if (retval) { |
69a85942 GKH |
2250 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2251 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2252 | goto error_cdev; |
fbf82fd2 | 2253 | } |
501950d8 | 2254 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2255 | out: |
2256 | return retval; | |
a7b986b3 | 2257 | |
a7b986b3 GKH |
2258 | error_cdev: |
2259 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2260 | goto out; | |
fbf82fd2 KS |
2261 | } |
2262 | ||
9f8b17e6 | 2263 | void usb_devio_cleanup(void) |
fbf82fd2 | 2264 | { |
a7b986b3 | 2265 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2266 | cdev_del(&usb_device_cdev); |
fad21bdf | 2267 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2268 | } |