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> | |
b11b2e1b | 43 | #include <linux/string.h> |
1da177e4 LT |
44 | #include <linux/usb.h> |
45 | #include <linux/usbdevice_fs.h> | |
27729aad | 46 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 47 | #include <linux/cdev.h> |
a7b986b3 | 48 | #include <linux/notifier.h> |
7a01955f | 49 | #include <linux/security.h> |
d178bc3a | 50 | #include <linux/user_namespace.h> |
3d97ff63 | 51 | #include <linux/scatterlist.h> |
e6889b31 | 52 | #include <linux/uaccess.h> |
1da177e4 LT |
53 | #include <asm/byteorder.h> |
54 | #include <linux/moduleparam.h> | |
55 | ||
1da177e4 LT |
56 | #include "usb.h" |
57 | ||
fbf82fd2 | 58 | #define USB_MAXBUS 64 |
fa86ad0b | 59 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 60 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 61 | |
4a2a8a2c AS |
62 | /* Mutual exclusion for removal, open, and release */ |
63 | DEFINE_MUTEX(usbfs_mutex); | |
64 | ||
cd9f0375 AS |
65 | struct dev_state { |
66 | struct list_head list; /* state list */ | |
67 | struct usb_device *dev; | |
68 | struct file *file; | |
69 | spinlock_t lock; /* protects the async urb lists */ | |
70 | struct list_head async_pending; | |
71 | struct list_head async_completed; | |
72 | wait_queue_head_t wait; /* wake up if a request completed */ | |
73 | unsigned int discsignr; | |
74 | struct pid *disc_pid; | |
d178bc3a | 75 | const struct cred *cred; |
cd9f0375 AS |
76 | void __user *disccontext; |
77 | unsigned long ifclaimed; | |
78 | u32 secid; | |
01c6460f | 79 | u32 disabled_bulk_eps; |
cd9f0375 AS |
80 | }; |
81 | ||
1da177e4 LT |
82 | struct async { |
83 | struct list_head asynclist; | |
84 | struct dev_state *ps; | |
2425c08b | 85 | struct pid *pid; |
d178bc3a | 86 | const struct cred *cred; |
1da177e4 LT |
87 | unsigned int signr; |
88 | unsigned int ifnum; | |
89 | void __user *userbuffer; | |
90 | void __user *userurb; | |
91 | struct urb *urb; | |
add1aaea | 92 | unsigned int mem_usage; |
e015268d | 93 | int status; |
7a01955f | 94 | u32 secid; |
01c6460f AS |
95 | u8 bulk_addr; |
96 | u8 bulk_status; | |
1da177e4 LT |
97 | }; |
98 | ||
90ab5ee9 | 99 | static bool usbfs_snoop; |
04e482ff GKH |
100 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
101 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
102 | |
103 | #define snoop(dev, format, arg...) \ | |
104 | do { \ | |
105 | if (usbfs_snoop) \ | |
04e482ff | 106 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
107 | } while (0) |
108 | ||
4c6e8971 AS |
109 | enum snoop_when { |
110 | SUBMIT, COMPLETE | |
111 | }; | |
fad21bdf | 112 | |
4c6e8971 | 113 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 114 | |
add1aaea | 115 | /* Limit on the total amount of memory we can allocate for transfers */ |
3f5eb8d5 AS |
116 | static unsigned usbfs_memory_mb = 16; |
117 | module_param(usbfs_memory_mb, uint, 0644); | |
118 | MODULE_PARM_DESC(usbfs_memory_mb, | |
119 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
120 | ||
025d4430 | 121 | /* Hard limit, necessary to avoid arithmetic overflow */ |
3f5eb8d5 | 122 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) |
1da177e4 | 123 | |
add1aaea AS |
124 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
125 | ||
126 | /* Check whether it's okay to allocate more memory for a transfer */ | |
127 | static int usbfs_increase_memory_usage(unsigned amount) | |
128 | { | |
3f5eb8d5 AS |
129 | unsigned lim; |
130 | ||
131 | /* | |
132 | * Convert usbfs_memory_mb to bytes, avoiding overflows. | |
133 | * 0 means use the hard limit (effectively unlimited). | |
134 | */ | |
135 | lim = ACCESS_ONCE(usbfs_memory_mb); | |
136 | if (lim == 0 || lim > (USBFS_XFER_MAX >> 20)) | |
137 | lim = USBFS_XFER_MAX; | |
138 | else | |
139 | lim <<= 20; | |
140 | ||
add1aaea | 141 | atomic_add(amount, &usbfs_memory_usage); |
3f5eb8d5 | 142 | if (atomic_read(&usbfs_memory_usage) <= lim) |
add1aaea AS |
143 | return 0; |
144 | atomic_sub(amount, &usbfs_memory_usage); | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
148 | /* Memory for a transfer is being deallocated */ | |
149 | static void usbfs_decrease_memory_usage(unsigned amount) | |
150 | { | |
151 | atomic_sub(amount, &usbfs_memory_usage); | |
152 | } | |
4c6e8971 | 153 | |
d34d9721 | 154 | static int connected(struct dev_state *ps) |
1da177e4 | 155 | { |
349710c3 AS |
156 | return (!list_empty(&ps->list) && |
157 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
158 | } |
159 | ||
160 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
161 | { | |
162 | loff_t ret; | |
163 | ||
496ad9aa | 164 | mutex_lock(&file_inode(file)->i_mutex); |
1da177e4 LT |
165 | |
166 | switch (orig) { | |
167 | case 0: | |
168 | file->f_pos = offset; | |
169 | ret = file->f_pos; | |
170 | break; | |
171 | case 1: | |
172 | file->f_pos += offset; | |
173 | ret = file->f_pos; | |
174 | break; | |
175 | case 2: | |
176 | default: | |
177 | ret = -EINVAL; | |
178 | } | |
179 | ||
496ad9aa | 180 | mutex_unlock(&file_inode(file)->i_mutex); |
1da177e4 LT |
181 | return ret; |
182 | } | |
183 | ||
04e482ff GKH |
184 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
185 | loff_t *ppos) | |
1da177e4 | 186 | { |
ec17cf1c | 187 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
188 | struct usb_device *dev = ps->dev; |
189 | ssize_t ret = 0; | |
190 | unsigned len; | |
191 | loff_t pos; | |
192 | int i; | |
193 | ||
194 | pos = *ppos; | |
195 | usb_lock_device(dev); | |
349710c3 | 196 | if (!connected(ps)) { |
1da177e4 LT |
197 | ret = -ENODEV; |
198 | goto err; | |
199 | } else if (pos < 0) { | |
200 | ret = -EINVAL; | |
201 | goto err; | |
202 | } | |
203 | ||
204 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
205 | /* 18 bytes - fits on the stack */ |
206 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
207 | |
208 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
209 | le16_to_cpus(&temp_desc.bcdUSB); |
210 | le16_to_cpus(&temp_desc.idVendor); | |
211 | le16_to_cpus(&temp_desc.idProduct); | |
212 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
213 | |
214 | len = sizeof(struct usb_device_descriptor) - pos; | |
215 | if (len > nbytes) | |
216 | len = nbytes; | |
8781ba0a | 217 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
218 | ret = -EFAULT; |
219 | goto err; | |
220 | } | |
1da177e4 LT |
221 | |
222 | *ppos += len; | |
223 | buf += len; | |
224 | nbytes -= len; | |
225 | ret += len; | |
226 | } | |
227 | ||
228 | pos = sizeof(struct usb_device_descriptor); | |
229 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
230 | struct usb_config_descriptor *config = | |
231 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
232 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
233 | ||
234 | if (*ppos < pos + length) { | |
235 | ||
236 | /* The descriptor may claim to be longer than it | |
237 | * really is. Here is the actual allocated length. */ | |
238 | unsigned alloclen = | |
239 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
240 | ||
241 | len = length - (*ppos - pos); | |
242 | if (len > nbytes) | |
243 | len = nbytes; | |
244 | ||
245 | /* Simply don't write (skip over) unallocated parts */ | |
246 | if (alloclen > (*ppos - pos)) { | |
247 | alloclen -= (*ppos - pos); | |
248 | if (copy_to_user(buf, | |
249 | dev->rawdescriptors[i] + (*ppos - pos), | |
250 | min(len, alloclen))) { | |
251 | ret = -EFAULT; | |
252 | goto err; | |
253 | } | |
254 | } | |
255 | ||
256 | *ppos += len; | |
257 | buf += len; | |
258 | nbytes -= len; | |
259 | ret += len; | |
260 | } | |
261 | ||
262 | pos += length; | |
263 | } | |
264 | ||
265 | err: | |
266 | usb_unlock_device(dev); | |
267 | return ret; | |
268 | } | |
269 | ||
270 | /* | |
271 | * async list handling | |
272 | */ | |
273 | ||
274 | static struct async *alloc_async(unsigned int numisoframes) | |
275 | { | |
dd95b814 | 276 | struct async *as; |
0a1ef3b5 | 277 | |
dd95b814 | 278 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
279 | if (!as) |
280 | return NULL; | |
1da177e4 LT |
281 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
282 | if (!as->urb) { | |
283 | kfree(as); | |
284 | return NULL; | |
285 | } | |
04e482ff | 286 | return as; |
1da177e4 LT |
287 | } |
288 | ||
289 | static void free_async(struct async *as) | |
290 | { | |
3d97ff63 HG |
291 | int i; |
292 | ||
2425c08b | 293 | put_pid(as->pid); |
1b41c832 SS |
294 | if (as->cred) |
295 | put_cred(as->cred); | |
3d97ff63 HG |
296 | for (i = 0; i < as->urb->num_sgs; i++) { |
297 | if (sg_page(&as->urb->sg[i])) | |
298 | kfree(sg_virt(&as->urb->sg[i])); | |
299 | } | |
300 | kfree(as->urb->sg); | |
6fd19f4b JJ |
301 | kfree(as->urb->transfer_buffer); |
302 | kfree(as->urb->setup_packet); | |
1da177e4 | 303 | usb_free_urb(as->urb); |
add1aaea | 304 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 305 | kfree(as); |
1da177e4 LT |
306 | } |
307 | ||
d34d9721 | 308 | static void async_newpending(struct async *as) |
1da177e4 | 309 | { |
04e482ff GKH |
310 | struct dev_state *ps = as->ps; |
311 | unsigned long flags; | |
312 | ||
313 | spin_lock_irqsave(&ps->lock, flags); | |
314 | list_add_tail(&as->asynclist, &ps->async_pending); | |
315 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
316 | } |
317 | ||
d34d9721 | 318 | static void async_removepending(struct async *as) |
1da177e4 | 319 | { |
04e482ff GKH |
320 | struct dev_state *ps = as->ps; |
321 | unsigned long flags; | |
322 | ||
323 | spin_lock_irqsave(&ps->lock, flags); | |
324 | list_del_init(&as->asynclist); | |
325 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
326 | } |
327 | ||
d34d9721 | 328 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 329 | { |
04e482ff GKH |
330 | unsigned long flags; |
331 | struct async *as = NULL; | |
332 | ||
333 | spin_lock_irqsave(&ps->lock, flags); | |
334 | if (!list_empty(&ps->async_completed)) { | |
335 | as = list_entry(ps->async_completed.next, struct async, | |
336 | asynclist); | |
337 | list_del_init(&as->asynclist); | |
338 | } | |
339 | spin_unlock_irqrestore(&ps->lock, flags); | |
340 | return as; | |
1da177e4 LT |
341 | } |
342 | ||
d34d9721 | 343 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 344 | void __user *userurb) |
1da177e4 | 345 | { |
04e482ff | 346 | struct async *as; |
1da177e4 | 347 | |
1da177e4 LT |
348 | list_for_each_entry(as, &ps->async_pending, asynclist) |
349 | if (as->userurb == userurb) { | |
350 | list_del_init(&as->asynclist); | |
1da177e4 LT |
351 | return as; |
352 | } | |
4e09dcf2 | 353 | |
04e482ff | 354 | return NULL; |
1da177e4 LT |
355 | } |
356 | ||
4c6e8971 AS |
357 | static void snoop_urb(struct usb_device *udev, |
358 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
359 | int timeout_or_status, enum snoop_when when, |
360 | unsigned char *data, unsigned data_len) | |
e639dd3f | 361 | { |
4c6e8971 AS |
362 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
363 | static const char *dirs[] = {"out", "in"}; | |
364 | int ep; | |
365 | const char *t, *d; | |
e639dd3f GKH |
366 | |
367 | if (!usbfs_snoop) | |
368 | return; | |
369 | ||
4c6e8971 AS |
370 | ep = usb_pipeendpoint(pipe); |
371 | t = types[usb_pipetype(pipe)]; | |
372 | d = dirs[!!usb_pipein(pipe)]; | |
373 | ||
374 | if (userurb) { /* Async */ | |
375 | if (when == SUBMIT) | |
376 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
377 | "length %u\n", | |
378 | userurb, ep, t, d, length); | |
379 | else | |
380 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
381 | "actual_length %u status %d\n", | |
382 | userurb, ep, t, d, length, | |
383 | timeout_or_status); | |
384 | } else { | |
385 | if (when == SUBMIT) | |
386 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
387 | "timeout %d\n", | |
388 | ep, t, d, length, timeout_or_status); | |
389 | else | |
390 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
391 | "status %d\n", | |
392 | ep, t, d, length, timeout_or_status); | |
393 | } | |
0880aef4 CF |
394 | |
395 | if (data && data_len > 0) { | |
396 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
397 | data, data_len, 1); | |
398 | } | |
e639dd3f GKH |
399 | } |
400 | ||
3d97ff63 HG |
401 | static void snoop_urb_data(struct urb *urb, unsigned len) |
402 | { | |
403 | int i, size; | |
404 | ||
405 | if (!usbfs_snoop) | |
406 | return; | |
407 | ||
408 | if (urb->num_sgs == 0) { | |
409 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
410 | urb->transfer_buffer, len, 1); | |
411 | return; | |
412 | } | |
413 | ||
414 | for (i = 0; i < urb->num_sgs && len; i++) { | |
415 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
416 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
417 | sg_virt(&urb->sg[i]), size, 1); | |
418 | len -= size; | |
419 | } | |
420 | } | |
421 | ||
422 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
423 | { | |
424 | unsigned i, len, size; | |
425 | ||
426 | if (urb->number_of_packets > 0) /* Isochronous */ | |
427 | len = urb->transfer_buffer_length; | |
428 | else /* Non-Isoc */ | |
429 | len = urb->actual_length; | |
430 | ||
431 | if (urb->num_sgs == 0) { | |
432 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
433 | return -EFAULT; | |
434 | return 0; | |
435 | } | |
436 | ||
437 | for (i = 0; i < urb->num_sgs && len; i++) { | |
438 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
439 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
440 | return -EFAULT; | |
441 | userbuffer += size; | |
442 | len -= size; | |
443 | } | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
01c6460f AS |
448 | #define AS_CONTINUATION 1 |
449 | #define AS_UNLINK 2 | |
450 | ||
451 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
452 | __releases(ps->lock) | |
453 | __acquires(ps->lock) | |
454 | { | |
4e09dcf2 | 455 | struct urb *urb; |
01c6460f AS |
456 | struct async *as; |
457 | ||
458 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
459 | * including the first one without AS_CONTINUATION. If such an | |
460 | * URB is encountered then a new transfer has already started so | |
461 | * the endpoint doesn't need to be disabled; otherwise it does. | |
462 | */ | |
463 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
464 | if (as->bulk_addr == bulk_addr) { | |
465 | if (as->bulk_status != AS_CONTINUATION) | |
466 | goto rescan; | |
467 | as->bulk_status = AS_UNLINK; | |
468 | as->bulk_addr = 0; | |
469 | } | |
470 | } | |
471 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
472 | ||
473 | /* Now carefully unlink all the marked pending URBs */ | |
474 | rescan: | |
475 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
476 | if (as->bulk_status == AS_UNLINK) { | |
477 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
478 | urb = as->urb; |
479 | usb_get_urb(urb); | |
01c6460f | 480 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
481 | usb_unlink_urb(urb); |
482 | usb_put_urb(urb); | |
01c6460f AS |
483 | spin_lock(&ps->lock); |
484 | goto rescan; | |
485 | } | |
486 | } | |
487 | } | |
488 | ||
7d12e780 | 489 | static void async_completed(struct urb *urb) |
1da177e4 | 490 | { |
04e482ff GKH |
491 | struct async *as = urb->context; |
492 | struct dev_state *ps = as->ps; | |
1da177e4 | 493 | struct siginfo sinfo; |
516a1a07 | 494 | struct pid *pid = NULL; |
516a1a07 | 495 | u32 secid = 0; |
d178bc3a | 496 | const struct cred *cred = NULL; |
516a1a07 | 497 | int signr; |
1da177e4 | 498 | |
04e482ff GKH |
499 | spin_lock(&ps->lock); |
500 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 501 | as->status = urb->status; |
516a1a07 ON |
502 | signr = as->signr; |
503 | if (signr) { | |
1da177e4 | 504 | sinfo.si_signo = as->signr; |
e015268d | 505 | sinfo.si_errno = as->status; |
1da177e4 LT |
506 | sinfo.si_code = SI_ASYNCIO; |
507 | sinfo.si_addr = as->userurb; | |
aec01c58 | 508 | pid = get_pid(as->pid); |
d178bc3a | 509 | cred = get_cred(as->cred); |
516a1a07 | 510 | secid = as->secid; |
1da177e4 | 511 | } |
e639dd3f | 512 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 513 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 HG |
514 | as->status, COMPLETE, NULL, 0); |
515 | if ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_IN) | |
516 | snoop_urb_data(urb, urb->actual_length); | |
517 | ||
01c6460f AS |
518 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
519 | as->status != -ENOENT) | |
520 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
521 | spin_unlock(&ps->lock); |
522 | ||
aec01c58 | 523 | if (signr) { |
d178bc3a | 524 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 525 | put_pid(pid); |
d178bc3a | 526 | put_cred(cred); |
aec01c58 | 527 | } |
516a1a07 | 528 | |
e639dd3f | 529 | wake_up(&ps->wait); |
1da177e4 LT |
530 | } |
531 | ||
04e482ff | 532 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 | 533 | { |
4e09dcf2 | 534 | struct urb *urb; |
1da177e4 LT |
535 | struct async *as; |
536 | unsigned long flags; | |
537 | ||
538 | spin_lock_irqsave(&ps->lock, flags); | |
539 | while (!list_empty(list)) { | |
540 | as = list_entry(list->next, struct async, asynclist); | |
541 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
542 | urb = as->urb; |
543 | usb_get_urb(urb); | |
1da177e4 LT |
544 | |
545 | /* drop the spinlock so the completion handler can run */ | |
546 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
547 | usb_kill_urb(urb); |
548 | usb_put_urb(urb); | |
1da177e4 LT |
549 | spin_lock_irqsave(&ps->lock, flags); |
550 | } | |
551 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
552 | } |
553 | ||
04e482ff GKH |
554 | static void destroy_async_on_interface(struct dev_state *ps, |
555 | unsigned int ifnum) | |
1da177e4 LT |
556 | { |
557 | struct list_head *p, *q, hitlist; | |
558 | unsigned long flags; | |
559 | ||
560 | INIT_LIST_HEAD(&hitlist); | |
561 | spin_lock_irqsave(&ps->lock, flags); | |
562 | list_for_each_safe(p, q, &ps->async_pending) | |
563 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
564 | list_move_tail(p, &hitlist); | |
565 | spin_unlock_irqrestore(&ps->lock, flags); | |
566 | destroy_async(ps, &hitlist); | |
567 | } | |
568 | ||
d34d9721 | 569 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 570 | { |
04e482ff | 571 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
572 | } |
573 | ||
574 | /* | |
575 | * interface claims are made only at the request of user level code, | |
576 | * which can also release them (explicitly or by closing files). | |
577 | * they're also undone when devices disconnect. | |
578 | */ | |
579 | ||
04e482ff GKH |
580 | static int driver_probe(struct usb_interface *intf, |
581 | const struct usb_device_id *id) | |
1da177e4 LT |
582 | { |
583 | return -ENODEV; | |
584 | } | |
585 | ||
586 | static void driver_disconnect(struct usb_interface *intf) | |
587 | { | |
04e482ff | 588 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
589 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
590 | ||
591 | if (!ps) | |
592 | return; | |
593 | ||
594 | /* NOTE: this relies on usbcore having canceled and completed | |
595 | * all pending I/O requests; 2.6 does that. | |
596 | */ | |
597 | ||
598 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
599 | clear_bit(ifnum, &ps->ifclaimed); | |
600 | else | |
3b6004f3 GKH |
601 | dev_warn(&intf->dev, "interface number %u out of range\n", |
602 | ifnum); | |
1da177e4 | 603 | |
04e482ff | 604 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
605 | |
606 | /* force async requests to complete */ | |
607 | destroy_async_on_interface(ps, ifnum); | |
608 | } | |
609 | ||
2e2eb83f AS |
610 | /* The following routines are merely placeholders. There is no way |
611 | * to inform a user task about suspend or resumes. | |
612 | */ | |
613 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
614 | { | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static int driver_resume(struct usb_interface *intf) | |
619 | { | |
620 | return 0; | |
621 | } | |
622 | ||
1da177e4 | 623 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
624 | .name = "usbfs", |
625 | .probe = driver_probe, | |
626 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
627 | .suspend = driver_suspend, |
628 | .resume = driver_resume, | |
1da177e4 LT |
629 | }; |
630 | ||
631 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
632 | { | |
633 | struct usb_device *dev = ps->dev; | |
634 | struct usb_interface *intf; | |
635 | int err; | |
636 | ||
637 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
638 | return -EINVAL; | |
639 | /* already claimed */ | |
640 | if (test_bit(ifnum, &ps->ifclaimed)) | |
641 | return 0; | |
642 | ||
1da177e4 LT |
643 | intf = usb_ifnum_to_if(dev, ifnum); |
644 | if (!intf) | |
645 | err = -ENOENT; | |
646 | else | |
647 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
648 | if (err == 0) |
649 | set_bit(ifnum, &ps->ifclaimed); | |
650 | return err; | |
651 | } | |
652 | ||
653 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
654 | { | |
655 | struct usb_device *dev; | |
656 | struct usb_interface *intf; | |
657 | int err; | |
658 | ||
659 | err = -EINVAL; | |
660 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
661 | return err; | |
662 | dev = ps->dev; | |
1da177e4 LT |
663 | intf = usb_ifnum_to_if(dev, ifnum); |
664 | if (!intf) | |
665 | err = -ENOENT; | |
666 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
667 | usb_driver_release_interface(&usbfs_driver, intf); | |
668 | err = 0; | |
669 | } | |
1da177e4 LT |
670 | return err; |
671 | } | |
672 | ||
673 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
674 | { | |
675 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
676 | return -EHOSTUNREACH; | |
677 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
678 | return -EINVAL; | |
679 | if (test_bit(ifnum, &ps->ifclaimed)) | |
680 | return 0; | |
681 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
682 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
683 | "interface %u before use\n", task_pid_nr(current), | |
684 | current->comm, ifnum); | |
1da177e4 LT |
685 | return claimintf(ps, ifnum); |
686 | } | |
687 | ||
688 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
689 | { | |
690 | unsigned int i, j, e; | |
04e482ff | 691 | struct usb_interface *intf; |
1da177e4 LT |
692 | struct usb_host_interface *alts; |
693 | struct usb_endpoint_descriptor *endpt; | |
694 | ||
695 | if (ep & ~(USB_DIR_IN|0xf)) | |
696 | return -EINVAL; | |
697 | if (!dev->actconfig) | |
698 | return -ESRCH; | |
699 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
700 | intf = dev->actconfig->interface[i]; | |
701 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 702 | alts = &intf->altsetting[j]; |
1da177e4 LT |
703 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
704 | endpt = &alts->endpoint[e].desc; | |
705 | if (endpt->bEndpointAddress == ep) | |
706 | return alts->desc.bInterfaceNumber; | |
707 | } | |
708 | } | |
709 | } | |
04e482ff | 710 | return -ENOENT; |
1da177e4 LT |
711 | } |
712 | ||
04e482ff | 713 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
393cbb51 | 714 | unsigned int request, unsigned int index) |
1da177e4 LT |
715 | { |
716 | int ret = 0; | |
393cbb51 | 717 | struct usb_host_interface *alt_setting; |
1da177e4 | 718 | |
6da9c990 DV |
719 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
720 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 721 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
722 | return -EHOSTUNREACH; |
723 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
724 | return 0; | |
725 | ||
393cbb51 MD |
726 | /* |
727 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
728 | * class specification, which we always want to allow as it is used |
729 | * to query things like ink level, etc. | |
393cbb51 MD |
730 | */ |
731 | if (requesttype == 0xa1 && request == 0) { | |
732 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
733 | index >> 8, index & 0xff); | |
734 | if (alt_setting | |
735 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 736 | return 0; |
393cbb51 MD |
737 | } |
738 | ||
1da177e4 LT |
739 | index &= 0xff; |
740 | switch (requesttype & USB_RECIP_MASK) { | |
741 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
742 | if ((index & ~USB_DIR_IN) == 0) |
743 | return 0; | |
04e482ff | 744 | ret = findintfep(ps->dev, index); |
831abf76 KG |
745 | if (ret < 0) { |
746 | /* | |
747 | * Some not fully compliant Win apps seem to get | |
748 | * index wrong and have the endpoint number here | |
749 | * rather than the endpoint address (with the | |
750 | * correct direction). Win does let this through, | |
751 | * so we'll not reject it here but leave it to | |
752 | * the device to not break KVM. But we warn. | |
753 | */ | |
754 | ret = findintfep(ps->dev, index ^ 0x80); | |
755 | if (ret >= 0) | |
756 | dev_info(&ps->dev->dev, | |
757 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
758 | __func__, task_pid_nr(current), | |
759 | current->comm, index, index ^ 0x80); | |
760 | } | |
04e482ff | 761 | if (ret >= 0) |
1da177e4 LT |
762 | ret = checkintf(ps, ret); |
763 | break; | |
764 | ||
765 | case USB_RECIP_INTERFACE: | |
766 | ret = checkintf(ps, index); | |
767 | break; | |
768 | } | |
769 | return ret; | |
770 | } | |
771 | ||
61ad04a8 | 772 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 773 | { |
a80d5ff0 | 774 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 775 | } |
4592bf5a | 776 | |
61ad04a8 | 777 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
778 | { |
779 | struct device *dev; | |
780 | ||
a80d5ff0 DH |
781 | dev = bus_find_device(&usb_bus_type, NULL, |
782 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
783 | if (!dev) |
784 | return NULL; | |
9f8b17e6 KS |
785 | return container_of(dev, struct usb_device, dev); |
786 | } | |
4592bf5a | 787 | |
1da177e4 LT |
788 | /* |
789 | * file operations | |
790 | */ | |
791 | static int usbdev_open(struct inode *inode, struct file *file) | |
792 | { | |
fbf82fd2 | 793 | struct usb_device *dev = NULL; |
1da177e4 LT |
794 | struct dev_state *ps; |
795 | int ret; | |
796 | ||
1da177e4 | 797 | ret = -ENOMEM; |
04e482ff GKH |
798 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
799 | if (!ps) | |
62e299e6 | 800 | goto out_free_ps; |
1da177e4 | 801 | |
01105a24 | 802 | ret = -ENODEV; |
61ad04a8 | 803 | |
62e299e6 AS |
804 | /* Protect against simultaneous removal or release */ |
805 | mutex_lock(&usbfs_mutex); | |
806 | ||
9f8b17e6 | 807 | /* usbdev device-node */ |
fbf82fd2 | 808 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 809 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 810 | |
62e299e6 AS |
811 | mutex_unlock(&usbfs_mutex); |
812 | ||
813 | if (!dev) | |
814 | goto out_free_ps; | |
815 | ||
816 | usb_lock_device(dev); | |
817 | if (dev->state == USB_STATE_NOTATTACHED) | |
818 | goto out_unlock_device; | |
819 | ||
94fcda1f | 820 | ret = usb_autoresume_device(dev); |
01d883d4 | 821 | if (ret) |
62e299e6 | 822 | goto out_unlock_device; |
01d883d4 | 823 | |
1da177e4 LT |
824 | ps->dev = dev; |
825 | ps->file = file; | |
826 | spin_lock_init(&ps->lock); | |
316547fd | 827 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
828 | INIT_LIST_HEAD(&ps->async_pending); |
829 | INIT_LIST_HEAD(&ps->async_completed); | |
830 | init_waitqueue_head(&ps->wait); | |
831 | ps->discsignr = 0; | |
2425c08b | 832 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 833 | ps->cred = get_current_cred(); |
1da177e4 LT |
834 | ps->disccontext = NULL; |
835 | ps->ifclaimed = 0; | |
7a01955f | 836 | security_task_getsecid(current, &ps->secid); |
527660a8 | 837 | smp_wmb(); |
1da177e4 LT |
838 | list_add_tail(&ps->list, &dev->filelist); |
839 | file->private_data = ps; | |
62e299e6 | 840 | usb_unlock_device(dev); |
2da41d5f AS |
841 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
842 | current->comm); | |
62e299e6 AS |
843 | return ret; |
844 | ||
845 | out_unlock_device: | |
846 | usb_unlock_device(dev); | |
847 | usb_put_dev(dev); | |
848 | out_free_ps: | |
849 | kfree(ps); | |
4a2a8a2c | 850 | return ret; |
1da177e4 LT |
851 | } |
852 | ||
853 | static int usbdev_release(struct inode *inode, struct file *file) | |
854 | { | |
ec17cf1c | 855 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
856 | struct usb_device *dev = ps->dev; |
857 | unsigned int ifnum; | |
6ff10464 | 858 | struct async *as; |
1da177e4 LT |
859 | |
860 | usb_lock_device(dev); | |
7cbe5dca | 861 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 862 | |
1da177e4 | 863 | list_del_init(&ps->list); |
4a2a8a2c | 864 | |
1da177e4 LT |
865 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
866 | ifnum++) { | |
867 | if (test_bit(ifnum, &ps->ifclaimed)) | |
868 | releaseintf(ps, ifnum); | |
869 | } | |
870 | destroy_all_async(ps); | |
94fcda1f | 871 | usb_autosuspend_device(dev); |
1da177e4 LT |
872 | usb_unlock_device(dev); |
873 | usb_put_dev(dev); | |
2425c08b | 874 | put_pid(ps->disc_pid); |
d178bc3a | 875 | put_cred(ps->cred); |
6ff10464 AS |
876 | |
877 | as = async_getcompleted(ps); | |
878 | while (as) { | |
879 | free_async(as); | |
880 | as = async_getcompleted(ps); | |
881 | } | |
1da177e4 | 882 | kfree(ps); |
4a2a8a2c | 883 | return 0; |
1da177e4 LT |
884 | } |
885 | ||
886 | static int proc_control(struct dev_state *ps, void __user *arg) | |
887 | { | |
888 | struct usb_device *dev = ps->dev; | |
889 | struct usbdevfs_ctrltransfer ctrl; | |
890 | unsigned int tmo; | |
891 | unsigned char *tbuf; | |
ff66e3ce | 892 | unsigned wLength; |
4c6e8971 | 893 | int i, pipe, ret; |
1da177e4 LT |
894 | |
895 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
896 | return -EFAULT; | |
393cbb51 MD |
897 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
898 | ctrl.wIndex); | |
04e482ff | 899 | if (ret) |
1da177e4 | 900 | return ret; |
ff66e3ce AM |
901 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
902 | if (wLength > PAGE_SIZE) | |
1da177e4 | 903 | return -EINVAL; |
add1aaea AS |
904 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
905 | sizeof(struct usb_ctrlrequest)); | |
906 | if (ret) | |
907 | return ret; | |
04e482ff | 908 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
909 | if (!tbuf) { |
910 | ret = -ENOMEM; | |
911 | goto done; | |
912 | } | |
1da177e4 | 913 | tmo = ctrl.timeout; |
0880aef4 CF |
914 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
915 | "bRequest=%02x wValue=%04x " | |
916 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
917 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
918 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 919 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
920 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
921 | ctrl.wLength)) { | |
52fb743d AS |
922 | ret = -EINVAL; |
923 | goto done; | |
1da177e4 | 924 | } |
4c6e8971 | 925 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 926 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
927 | |
928 | usb_unlock_device(dev); | |
4c6e8971 | 929 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
930 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
931 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 932 | usb_lock_device(dev); |
0880aef4 | 933 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 934 | tbuf, max(i, 0)); |
1da177e4 | 935 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 936 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
937 | ret = -EFAULT; |
938 | goto done; | |
1da177e4 LT |
939 | } |
940 | } | |
941 | } else { | |
942 | if (ctrl.wLength) { | |
943 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
944 | ret = -EFAULT; |
945 | goto done; | |
1da177e4 LT |
946 | } |
947 | } | |
4c6e8971 | 948 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
949 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
950 | tbuf, ctrl.wLength); | |
4c6e8971 | 951 | |
1da177e4 | 952 | usb_unlock_device(dev); |
04e482ff GKH |
953 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
954 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
955 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 956 | usb_lock_device(dev); |
0880aef4 | 957 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 958 | } |
04e482ff | 959 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
960 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
961 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
962 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
963 | ctrl.wLength, i); | |
964 | } | |
52fb743d AS |
965 | ret = i; |
966 | done: | |
967 | free_page((unsigned long) tbuf); | |
add1aaea AS |
968 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
969 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 970 | return ret; |
1da177e4 LT |
971 | } |
972 | ||
973 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
974 | { | |
975 | struct usb_device *dev = ps->dev; | |
976 | struct usbdevfs_bulktransfer bulk; | |
977 | unsigned int tmo, len1, pipe; | |
978 | int len2; | |
979 | unsigned char *tbuf; | |
4c6e8971 | 980 | int i, ret; |
1da177e4 LT |
981 | |
982 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
983 | return -EFAULT; | |
04e482ff GKH |
984 | ret = findintfep(ps->dev, bulk.ep); |
985 | if (ret < 0) | |
1da177e4 | 986 | return ret; |
04e482ff GKH |
987 | ret = checkintf(ps, ret); |
988 | if (ret) | |
1da177e4 LT |
989 | return ret; |
990 | if (bulk.ep & USB_DIR_IN) | |
991 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
992 | else | |
993 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
994 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
995 | return -EINVAL; | |
996 | len1 = bulk.len; | |
3f5eb8d5 | 997 | if (len1 >= USBFS_XFER_MAX) |
1da177e4 | 998 | return -EINVAL; |
add1aaea AS |
999 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1000 | if (ret) | |
1001 | return ret; | |
1002 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) { | |
1003 | ret = -ENOMEM; | |
1004 | goto done; | |
1005 | } | |
1da177e4 LT |
1006 | tmo = bulk.timeout; |
1007 | if (bulk.ep & 0x80) { | |
1008 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
1009 | ret = -EINVAL; |
1010 | goto done; | |
1da177e4 | 1011 | } |
0880aef4 | 1012 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1013 | |
1da177e4 LT |
1014 | usb_unlock_device(dev); |
1015 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1016 | usb_lock_device(dev); | |
0880aef4 | 1017 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1018 | |
1da177e4 LT |
1019 | if (!i && len2) { |
1020 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1021 | ret = -EFAULT; |
1022 | goto done; | |
1da177e4 LT |
1023 | } |
1024 | } | |
1025 | } else { | |
1026 | if (len1) { | |
1027 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1028 | ret = -EFAULT; |
1029 | goto done; | |
1da177e4 LT |
1030 | } |
1031 | } | |
0880aef4 | 1032 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1033 | |
1da177e4 LT |
1034 | usb_unlock_device(dev); |
1035 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1036 | usb_lock_device(dev); | |
0880aef4 | 1037 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1038 | } |
52fb743d AS |
1039 | ret = (i < 0 ? i : len2); |
1040 | done: | |
1da177e4 | 1041 | kfree(tbuf); |
add1aaea | 1042 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1043 | return ret; |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
1047 | { | |
1048 | unsigned int ep; | |
1049 | int ret; | |
1050 | ||
1051 | if (get_user(ep, (unsigned int __user *)arg)) | |
1052 | return -EFAULT; | |
04e482ff GKH |
1053 | ret = findintfep(ps->dev, ep); |
1054 | if (ret < 0) | |
1da177e4 | 1055 | return ret; |
04e482ff GKH |
1056 | ret = checkintf(ps, ret); |
1057 | if (ret) | |
1da177e4 | 1058 | return ret; |
3444b26a | 1059 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1060 | return 0; |
1061 | } | |
1062 | ||
1063 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
1064 | { | |
1065 | unsigned int ep; | |
1066 | int pipe; | |
1067 | int ret; | |
1068 | ||
1069 | if (get_user(ep, (unsigned int __user *)arg)) | |
1070 | return -EFAULT; | |
04e482ff GKH |
1071 | ret = findintfep(ps->dev, ep); |
1072 | if (ret < 0) | |
1da177e4 | 1073 | return ret; |
04e482ff GKH |
1074 | ret = checkintf(ps, ret); |
1075 | if (ret) | |
1da177e4 LT |
1076 | return ret; |
1077 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
1078 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1079 | else | |
1080 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1081 | |
1082 | return usb_clear_halt(ps->dev, pipe); | |
1083 | } | |
1da177e4 LT |
1084 | |
1085 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
1086 | { | |
1087 | struct usbdevfs_getdriver gd; | |
1088 | struct usb_interface *intf; | |
1089 | int ret; | |
1090 | ||
1091 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1092 | return -EFAULT; | |
1da177e4 LT |
1093 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1094 | if (!intf || !intf->dev.driver) | |
1095 | ret = -ENODATA; | |
1096 | else { | |
b11b2e1b | 1097 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1098 | sizeof(gd.driver)); |
1099 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1100 | } | |
1da177e4 LT |
1101 | return ret; |
1102 | } | |
1103 | ||
1104 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
1105 | { | |
886ccd45 VK |
1106 | struct usbdevfs_connectinfo ci = { |
1107 | .devnum = ps->dev->devnum, | |
1108 | .slow = ps->dev->speed == USB_SPEED_LOW | |
1109 | }; | |
1da177e4 | 1110 | |
1da177e4 LT |
1111 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1112 | return -EFAULT; | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int proc_resetdevice(struct dev_state *ps) | |
1117 | { | |
742120c6 | 1118 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1119 | } |
1120 | ||
1121 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
1122 | { | |
1123 | struct usbdevfs_setinterface setintf; | |
1124 | int ret; | |
1125 | ||
1126 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1127 | return -EFAULT; | |
1128 | if ((ret = checkintf(ps, setintf.interface))) | |
1129 | return ret; | |
1130 | return usb_set_interface(ps->dev, setintf.interface, | |
1131 | setintf.altsetting); | |
1132 | } | |
1133 | ||
1134 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
1135 | { | |
3f141e2a | 1136 | int u; |
1da177e4 | 1137 | int status = 0; |
04e482ff | 1138 | struct usb_host_config *actconfig; |
1da177e4 | 1139 | |
3f141e2a | 1140 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1141 | return -EFAULT; |
1142 | ||
04e482ff GKH |
1143 | actconfig = ps->dev->actconfig; |
1144 | ||
1145 | /* Don't touch the device if any interfaces are claimed. | |
1146 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1147 | * an interface is claimed by usbfs it could easily deadlock. |
1148 | */ | |
04e482ff GKH |
1149 | if (actconfig) { |
1150 | int i; | |
1151 | ||
1152 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1153 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1154 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1155 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1156 | "while '%s' sets config #%d\n", |
1157 | actconfig->interface[i] | |
1158 | ->cur_altsetting | |
1159 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1160 | actconfig->interface[i] |
1161 | ->dev.driver->name, | |
1da177e4 | 1162 | current->comm, u); |
04e482ff | 1163 | status = -EBUSY; |
1da177e4 | 1164 | break; |
1da177e4 | 1165 | } |
04e482ff GKH |
1166 | } |
1167 | } | |
1da177e4 LT |
1168 | |
1169 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1170 | * so avoid usb_set_configuration()'s kick to sysfs | |
1171 | */ | |
1172 | if (status == 0) { | |
1173 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1174 | status = usb_reset_configuration(ps->dev); | |
1175 | else | |
1176 | status = usb_set_configuration(ps->dev, u); | |
1177 | } | |
1178 | ||
1179 | return status; | |
1180 | } | |
1181 | ||
1da177e4 | 1182 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1183 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1184 | void __user *arg) | |
1da177e4 LT |
1185 | { |
1186 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1187 | struct usb_host_endpoint *ep; | |
52fb743d | 1188 | struct async *as = NULL; |
1da177e4 LT |
1189 | struct usb_ctrlrequest *dr = NULL; |
1190 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 HG |
1191 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
1192 | void *buf; | |
1da177e4 | 1193 | |
14722ef4 AS |
1194 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1195 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1196 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1197 | USBDEVFS_URB_NO_FSBR | |
1198 | USBDEVFS_URB_ZERO_PACKET | | |
1199 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1200 | return -EINVAL; |
9180135b | 1201 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1202 | return -EINVAL; |
04e482ff GKH |
1203 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1204 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1205 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1206 | if (ifnum < 0) | |
1da177e4 | 1207 | return ifnum; |
04e482ff GKH |
1208 | ret = checkintf(ps, ifnum); |
1209 | if (ret) | |
1da177e4 LT |
1210 | return ret; |
1211 | } | |
93cf9b90 AS |
1212 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1213 | is_in = 1; | |
1214 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1215 | } else { | |
1216 | is_in = 0; | |
1217 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1218 | } | |
1da177e4 LT |
1219 | if (!ep) |
1220 | return -ENOENT; | |
add1aaea AS |
1221 | |
1222 | u = 0; | |
1da177e4 LT |
1223 | switch(uurb->type) { |
1224 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1225 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1226 | return -EINVAL; |
add1aaea AS |
1227 | /* min 8 byte setup packet */ |
1228 | if (uurb->buffer_length < 8) | |
1da177e4 | 1229 | return -EINVAL; |
04e482ff GKH |
1230 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1231 | if (!dr) | |
1da177e4 LT |
1232 | return -ENOMEM; |
1233 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1234 | ret = -EFAULT; |
1235 | goto error; | |
1da177e4 LT |
1236 | } |
1237 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1238 | ret = -EINVAL; |
1239 | goto error; | |
1da177e4 | 1240 | } |
393cbb51 | 1241 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1242 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1243 | if (ret) |
1244 | goto error; | |
1da177e4 LT |
1245 | uurb->number_of_packets = 0; |
1246 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1247 | uurb->buffer += 8; | |
93cf9b90 AS |
1248 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1249 | is_in = 1; | |
1250 | uurb->endpoint |= USB_DIR_IN; | |
1251 | } else { | |
1252 | is_in = 0; | |
1253 | uurb->endpoint &= ~USB_DIR_IN; | |
1254 | } | |
0880aef4 CF |
1255 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1256 | "bRequest=%02x wValue=%04x " | |
1257 | "wIndex=%04x wLength=%04x\n", | |
1258 | dr->bRequestType, dr->bRequest, | |
1259 | __le16_to_cpup(&dr->wValue), | |
1260 | __le16_to_cpup(&dr->wIndex), | |
1261 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1262 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1263 | break; |
1264 | ||
1265 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1266 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1267 | case USB_ENDPOINT_XFER_CONTROL: |
1268 | case USB_ENDPOINT_XFER_ISOC: | |
1269 | return -EINVAL; | |
f661c6f8 AS |
1270 | case USB_ENDPOINT_XFER_INT: |
1271 | /* allow single-shot interrupt transfers */ | |
1272 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1273 | goto interrupt_urb; | |
1da177e4 LT |
1274 | } |
1275 | uurb->number_of_packets = 0; | |
3d97ff63 HG |
1276 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1277 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1278 | num_sgs = 0; | |
1da177e4 LT |
1279 | break; |
1280 | ||
f661c6f8 AS |
1281 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1282 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1283 | return -EINVAL; | |
1284 | interrupt_urb: | |
1285 | uurb->number_of_packets = 0; | |
f661c6f8 AS |
1286 | break; |
1287 | ||
1da177e4 LT |
1288 | case USBDEVFS_URB_TYPE_ISO: |
1289 | /* arbitrary limit */ | |
04e482ff GKH |
1290 | if (uurb->number_of_packets < 1 || |
1291 | uurb->number_of_packets > 128) | |
1da177e4 | 1292 | return -EINVAL; |
93cf9b90 | 1293 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1294 | return -EINVAL; |
04e482ff GKH |
1295 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1296 | uurb->number_of_packets; | |
1da177e4 LT |
1297 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1298 | return -ENOMEM; | |
1299 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
52fb743d AS |
1300 | ret = -EFAULT; |
1301 | goto error; | |
1da177e4 LT |
1302 | } |
1303 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
e2e2f0ea FM |
1304 | /* |
1305 | * arbitrary limit need for USB 3.0 | |
1306 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1307 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1308 | * sizemax: 1024 * 16 * 3 = 49152 | |
1309 | */ | |
1310 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1311 | ret = -EINVAL; |
1312 | goto error; | |
1da177e4 LT |
1313 | } |
1314 | totlen += isopkt[u].length; | |
1315 | } | |
add1aaea | 1316 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1317 | uurb->buffer_length = totlen; |
1318 | break; | |
1319 | ||
1da177e4 LT |
1320 | default: |
1321 | return -EINVAL; | |
1322 | } | |
add1aaea | 1323 | |
3f5eb8d5 | 1324 | if (uurb->buffer_length >= USBFS_XFER_MAX) { |
add1aaea AS |
1325 | ret = -EINVAL; |
1326 | goto error; | |
1327 | } | |
9180135b AS |
1328 | if (uurb->buffer_length > 0 && |
1329 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1330 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1331 | ret = -EFAULT; |
1332 | goto error; | |
1da177e4 | 1333 | } |
9180135b AS |
1334 | as = alloc_async(uurb->number_of_packets); |
1335 | if (!as) { | |
52fb743d AS |
1336 | ret = -ENOMEM; |
1337 | goto error; | |
1da177e4 | 1338 | } |
3d97ff63 HG |
1339 | |
1340 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + | |
1341 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1342 | ret = usbfs_increase_memory_usage(u); |
1343 | if (ret) | |
1344 | goto error; | |
1345 | as->mem_usage = u; | |
1346 | ||
3d97ff63 HG |
1347 | if (num_sgs) { |
1348 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1349 | GFP_KERNEL); | |
1350 | if (!as->urb->sg) { | |
1351 | ret = -ENOMEM; | |
1352 | goto error; | |
1353 | } | |
1354 | as->urb->num_sgs = num_sgs; | |
1355 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1356 | ||
1357 | totlen = uurb->buffer_length; | |
1358 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1359 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1360 | buf = kmalloc(u, GFP_KERNEL); | |
1361 | if (!buf) { | |
1362 | ret = -ENOMEM; | |
1363 | goto error; | |
1364 | } | |
1365 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1366 | ||
1367 | if (!is_in) { | |
1368 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1369 | ret = -EFAULT; | |
1370 | goto error; | |
1371 | } | |
01463900 | 1372 | uurb->buffer += u; |
3d97ff63 HG |
1373 | } |
1374 | totlen -= u; | |
1375 | } | |
1376 | } else if (uurb->buffer_length > 0) { | |
9180135b AS |
1377 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, |
1378 | GFP_KERNEL); | |
1379 | if (!as->urb->transfer_buffer) { | |
52fb743d AS |
1380 | ret = -ENOMEM; |
1381 | goto error; | |
9180135b | 1382 | } |
3d97ff63 HG |
1383 | |
1384 | if (!is_in) { | |
1385 | if (copy_from_user(as->urb->transfer_buffer, | |
1386 | uurb->buffer, | |
1387 | uurb->buffer_length)) { | |
1388 | ret = -EFAULT; | |
1389 | goto error; | |
1390 | } | |
1391 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1392 | /* | |
1393 | * Isochronous input data may end up being | |
1394 | * discontiguous if some of the packets are short. | |
1395 | * Clear the buffer so that the gaps don't leak | |
1396 | * kernel data to userspace. | |
1397 | */ | |
7152b592 AS |
1398 | memset(as->urb->transfer_buffer, 0, |
1399 | uurb->buffer_length); | |
3d97ff63 | 1400 | } |
9180135b | 1401 | } |
04e482ff GKH |
1402 | as->urb->dev = ps->dev; |
1403 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1404 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1405 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1406 | |
1407 | /* This tedious sequence is necessary because the URB_* flags | |
1408 | * are internal to the kernel and subject to change, whereas | |
1409 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1410 | */ | |
1411 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1412 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1413 | u |= URB_ISO_ASAP; | |
1414 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1415 | u |= URB_SHORT_NOT_OK; | |
1416 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1417 | u |= URB_NO_FSBR; | |
1418 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1419 | u |= URB_ZERO_PACKET; | |
1420 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1421 | u |= URB_NO_INTERRUPT; | |
1422 | as->urb->transfer_flags = u; | |
1423 | ||
1da177e4 | 1424 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1425 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1426 | dr = NULL; |
1da177e4 LT |
1427 | as->urb->start_frame = uurb->start_frame; |
1428 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1429 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1430 | ps->dev->speed == USB_SPEED_HIGH) | |
1431 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1432 | else | |
1433 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1434 | as->urb->context = as; |
1435 | as->urb->complete = async_completed; | |
1da177e4 LT |
1436 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1437 | as->urb->iso_frame_desc[u].offset = totlen; | |
1438 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1439 | totlen += isopkt[u].length; | |
1440 | } | |
6fd19f4b | 1441 | kfree(isopkt); |
52fb743d | 1442 | isopkt = NULL; |
1da177e4 | 1443 | as->ps = ps; |
04e482ff | 1444 | as->userurb = arg; |
9180135b | 1445 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1446 | as->userbuffer = uurb->buffer; |
1447 | else | |
1448 | as->userbuffer = NULL; | |
1449 | as->signr = uurb->signr; | |
1450 | as->ifnum = ifnum; | |
2425c08b | 1451 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1452 | as->cred = get_current_cred(); |
7a01955f | 1453 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1454 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1455 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1456 | NULL, 0); |
1457 | if (!is_in) | |
1458 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1459 | ||
04e482ff | 1460 | async_newpending(as); |
01c6460f AS |
1461 | |
1462 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1463 | spin_lock_irq(&ps->lock); | |
1464 | ||
1465 | /* Not exactly the endpoint address; the direction bit is | |
1466 | * shifted to the 0x10 position so that the value will be | |
1467 | * between 0 and 31. | |
1468 | */ | |
1469 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1470 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1471 | >> 3); | |
1472 | ||
1473 | /* If this bulk URB is the start of a new transfer, re-enable | |
1474 | * the endpoint. Otherwise mark it as a continuation URB. | |
1475 | */ | |
1476 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1477 | as->bulk_status = AS_CONTINUATION; | |
1478 | else | |
1479 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1480 | ||
1481 | /* Don't accept continuation URBs if the endpoint is | |
1482 | * disabled because of an earlier error. | |
1483 | */ | |
1484 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1485 | ret = -EREMOTEIO; | |
1486 | else | |
1487 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1488 | spin_unlock_irq(&ps->lock); | |
1489 | } else { | |
1490 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1491 | } | |
1492 | ||
1493 | if (ret) { | |
04e482ff GKH |
1494 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1495 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1496 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1497 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1498 | async_removepending(as); |
52fb743d | 1499 | goto error; |
04e482ff GKH |
1500 | } |
1501 | return 0; | |
52fb743d AS |
1502 | |
1503 | error: | |
1504 | kfree(isopkt); | |
1505 | kfree(dr); | |
1506 | if (as) | |
1507 | free_async(as); | |
1508 | return ret; | |
1da177e4 LT |
1509 | } |
1510 | ||
1511 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1512 | { | |
1513 | struct usbdevfs_urb uurb; | |
1514 | ||
1515 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1516 | return -EFAULT; | |
1517 | ||
04e482ff GKH |
1518 | return proc_do_submiturb(ps, &uurb, |
1519 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1520 | arg); | |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1524 | { | |
4e09dcf2 | 1525 | struct urb *urb; |
1da177e4 | 1526 | struct async *as; |
4e09dcf2 | 1527 | unsigned long flags; |
1da177e4 | 1528 | |
4e09dcf2 | 1529 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1530 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1531 | if (!as) { |
1532 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1533 | return -EINVAL; |
4e09dcf2 HL |
1534 | } |
1535 | ||
1536 | urb = as->urb; | |
1537 | usb_get_urb(urb); | |
1538 | spin_unlock_irqrestore(&ps->lock, flags); | |
1539 | ||
1540 | usb_kill_urb(urb); | |
1541 | usb_put_urb(urb); | |
1542 | ||
1da177e4 LT |
1543 | return 0; |
1544 | } | |
1545 | ||
1546 | static int processcompl(struct async *as, void __user * __user *arg) | |
1547 | { | |
1548 | struct urb *urb = as->urb; | |
1549 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1550 | void __user *addr = as->userurb; | |
1551 | unsigned int i; | |
1552 | ||
7152b592 | 1553 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1554 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1555 | goto err_out; |
7152b592 | 1556 | } |
e015268d | 1557 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1558 | goto err_out; |
1da177e4 | 1559 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1560 | goto err_out; |
1da177e4 | 1561 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1562 | goto err_out; |
1da177e4 | 1563 | |
93cf9b90 | 1564 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1565 | for (i = 0; i < urb->number_of_packets; i++) { |
1566 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1567 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1568 | goto err_out; |
668a9541 CL |
1569 | if (put_user(urb->iso_frame_desc[i].status, |
1570 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1571 | goto err_out; |
668a9541 | 1572 | } |
1da177e4 LT |
1573 | } |
1574 | ||
1da177e4 LT |
1575 | if (put_user(addr, (void __user * __user *)arg)) |
1576 | return -EFAULT; | |
1577 | return 0; | |
d794a021 ON |
1578 | |
1579 | err_out: | |
d794a021 | 1580 | return -EFAULT; |
1da177e4 LT |
1581 | } |
1582 | ||
04e482ff | 1583 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1584 | { |
04e482ff | 1585 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1586 | struct async *as = NULL; |
1587 | struct usb_device *dev = ps->dev; | |
1588 | ||
1589 | add_wait_queue(&ps->wait, &wait); | |
1590 | for (;;) { | |
1591 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1592 | as = async_getcompleted(ps); |
1593 | if (as) | |
1da177e4 LT |
1594 | break; |
1595 | if (signal_pending(current)) | |
1596 | break; | |
1597 | usb_unlock_device(dev); | |
1598 | schedule(); | |
1599 | usb_lock_device(dev); | |
1600 | } | |
1601 | remove_wait_queue(&ps->wait, &wait); | |
1602 | set_current_state(TASK_RUNNING); | |
1603 | return as; | |
1604 | } | |
1605 | ||
1606 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1607 | { | |
1608 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1609 | if (as) { |
1610 | int retval = processcompl(as, (void __user * __user *)arg); | |
1611 | free_async(as); | |
1612 | return retval; | |
1613 | } | |
1da177e4 LT |
1614 | if (signal_pending(current)) |
1615 | return -EINTR; | |
1616 | return -EIO; | |
1617 | } | |
1618 | ||
1619 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1620 | { | |
ddeee0b2 | 1621 | int retval; |
1da177e4 LT |
1622 | struct async *as; |
1623 | ||
ddeee0b2 LT |
1624 | as = async_getcompleted(ps); |
1625 | retval = -EAGAIN; | |
1626 | if (as) { | |
1627 | retval = processcompl(as, (void __user * __user *)arg); | |
1628 | free_async(as); | |
1629 | } | |
1630 | return retval; | |
1da177e4 LT |
1631 | } |
1632 | ||
1633 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1634 | static int proc_control_compat(struct dev_state *ps, |
1635 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1636 | { | |
5b32c385 MB |
1637 | struct usbdevfs_ctrltransfer __user *p; |
1638 | __u32 udata; | |
1639 | p = compat_alloc_user_space(sizeof(*p)); | |
1640 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1641 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1642 | put_user(compat_ptr(udata), &p->data)) |
1643 | return -EFAULT; | |
5b32c385 | 1644 | return proc_control(ps, p); |
637e8a60 AB |
1645 | } |
1646 | ||
1647 | static int proc_bulk_compat(struct dev_state *ps, | |
1648 | struct usbdevfs_bulktransfer32 __user *p32) | |
1649 | { | |
06793f2d MB |
1650 | struct usbdevfs_bulktransfer __user *p; |
1651 | compat_uint_t n; | |
1652 | compat_caddr_t addr; | |
637e8a60 | 1653 | |
06793f2d | 1654 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1655 | |
06793f2d MB |
1656 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1657 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1658 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1659 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1660 | return -EFAULT; | |
637e8a60 | 1661 | |
06793f2d | 1662 | return proc_bulk(ps, p); |
637e8a60 AB |
1663 | } |
1664 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1665 | { | |
1666 | struct usbdevfs_disconnectsignal32 ds; | |
1667 | ||
1668 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1669 | return -EFAULT; | |
1670 | ps->discsignr = ds.signr; | |
1671 | ps->disccontext = compat_ptr(ds.context); | |
1672 | return 0; | |
1673 | } | |
1da177e4 LT |
1674 | |
1675 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1676 | struct usbdevfs_urb32 __user *uurb) | |
1677 | { | |
1678 | __u32 uptr; | |
18753ebc MB |
1679 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1680 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1681 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1682 | __get_user(kurb->status, &uurb->status) || | |
1683 | __get_user(kurb->flags, &uurb->flags) || | |
1684 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1685 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1686 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1687 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1688 | __get_user(kurb->error_count, &uurb->error_count) || | |
1689 | __get_user(kurb->signr, &uurb->signr)) | |
1690 | return -EFAULT; | |
1691 | ||
1692 | if (__get_user(uptr, &uurb->buffer)) | |
1693 | return -EFAULT; | |
1694 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1695 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1696 | return -EFAULT; |
1697 | kurb->usercontext = compat_ptr(uptr); | |
1698 | ||
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1703 | { | |
1704 | struct usbdevfs_urb uurb; | |
1705 | ||
04e482ff | 1706 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1707 | return -EFAULT; |
1708 | ||
04e482ff GKH |
1709 | return proc_do_submiturb(ps, &uurb, |
1710 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1711 | arg); | |
1da177e4 LT |
1712 | } |
1713 | ||
1714 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1715 | { | |
1716 | struct urb *urb = as->urb; | |
1717 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1718 | void __user *addr = as->userurb; | |
1719 | unsigned int i; | |
1720 | ||
2102e06a | 1721 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1722 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 1723 | return -EFAULT; |
2102e06a | 1724 | } |
e015268d | 1725 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1726 | return -EFAULT; |
1727 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1728 | return -EFAULT; | |
1729 | if (put_user(urb->error_count, &userurb->error_count)) | |
1730 | return -EFAULT; | |
1731 | ||
93cf9b90 | 1732 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1733 | for (i = 0; i < urb->number_of_packets; i++) { |
1734 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1735 | &userurb->iso_frame_desc[i].actual_length)) | |
1736 | return -EFAULT; | |
1737 | if (put_user(urb->iso_frame_desc[i].status, | |
1738 | &userurb->iso_frame_desc[i].status)) | |
1739 | return -EFAULT; | |
1740 | } | |
1da177e4 LT |
1741 | } |
1742 | ||
c714de5d | 1743 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1744 | return -EFAULT; |
1745 | return 0; | |
1746 | } | |
1747 | ||
1748 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1749 | { | |
1750 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1751 | if (as) { |
1752 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1753 | free_async(as); | |
1754 | return retval; | |
1755 | } | |
1da177e4 LT |
1756 | if (signal_pending(current)) |
1757 | return -EINTR; | |
1758 | return -EIO; | |
1759 | } | |
1760 | ||
1761 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1762 | { | |
ddeee0b2 | 1763 | int retval; |
1da177e4 LT |
1764 | struct async *as; |
1765 | ||
ddeee0b2 LT |
1766 | retval = -EAGAIN; |
1767 | as = async_getcompleted(ps); | |
1768 | if (as) { | |
1769 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1770 | free_async(as); | |
1771 | } | |
1772 | return retval; | |
1da177e4 LT |
1773 | } |
1774 | ||
637e8a60 | 1775 | |
1da177e4 LT |
1776 | #endif |
1777 | ||
1778 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1779 | { | |
1780 | struct usbdevfs_disconnectsignal ds; | |
1781 | ||
1782 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1783 | return -EFAULT; | |
1da177e4 LT |
1784 | ps->discsignr = ds.signr; |
1785 | ps->disccontext = ds.context; | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1790 | { | |
1791 | unsigned int ifnum; | |
1792 | ||
1793 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1794 | return -EFAULT; | |
1795 | return claimintf(ps, ifnum); | |
1796 | } | |
1797 | ||
1798 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1799 | { | |
1800 | unsigned int ifnum; | |
1801 | int ret; | |
1802 | ||
1803 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1804 | return -EFAULT; | |
1805 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1806 | return ret; | |
1807 | destroy_async_on_interface (ps, ifnum); | |
1808 | return 0; | |
1809 | } | |
1810 | ||
c36fc889 | 1811 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1812 | { |
1da177e4 LT |
1813 | int size; |
1814 | void *buf = NULL; | |
1815 | int retval = 0; | |
1816 | struct usb_interface *intf = NULL; | |
1817 | struct usb_driver *driver = NULL; | |
1da177e4 | 1818 | |
c36fc889 | 1819 | /* alloc buffer */ |
04e482ff | 1820 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
4baf0df7 Tİ |
1821 | buf = kmalloc(size, GFP_KERNEL); |
1822 | if (buf == NULL) | |
1da177e4 | 1823 | return -ENOMEM; |
c36fc889 | 1824 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1825 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1826 | kfree(buf); |
1da177e4 LT |
1827 | return -EFAULT; |
1828 | } | |
1829 | } else { | |
04e482ff | 1830 | memset(buf, 0, size); |
1da177e4 LT |
1831 | } |
1832 | } | |
1833 | ||
349710c3 | 1834 | if (!connected(ps)) { |
6fd19f4b | 1835 | kfree(buf); |
1da177e4 LT |
1836 | return -ENODEV; |
1837 | } | |
1838 | ||
1839 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1840 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1841 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1842 | retval = -EINVAL; | |
c36fc889 | 1843 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1844 | |
1845 | /* disconnect kernel driver from interface */ | |
1846 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1847 | if (intf->dev.driver) { |
1848 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1849 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1850 | usb_driver_release_interface(driver, intf); |
1851 | } else | |
1852 | retval = -ENODATA; | |
1da177e4 LT |
1853 | break; |
1854 | ||
1855 | /* let kernel drivers try to (re)bind to the interface */ | |
1856 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1857 | if (!intf->dev.driver) |
1858 | retval = device_attach(&intf->dev); | |
1859 | else | |
1860 | retval = -EBUSY; | |
1da177e4 LT |
1861 | break; |
1862 | ||
1863 | /* talk directly to the interface's driver */ | |
1864 | default: | |
1da177e4 LT |
1865 | if (intf->dev.driver) |
1866 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 1867 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
1868 | retval = -ENOTTY; |
1869 | } else { | |
c532b29a | 1870 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1871 | if (retval == -ENOIOCTLCMD) |
1872 | retval = -ENOTTY; | |
1873 | } | |
1da177e4 LT |
1874 | } |
1875 | ||
1876 | /* cleanup and return */ | |
1877 | if (retval >= 0 | |
04e482ff | 1878 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1879 | && size > 0 |
04e482ff | 1880 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1881 | retval = -EFAULT; |
6fd19f4b JJ |
1882 | |
1883 | kfree(buf); | |
1da177e4 LT |
1884 | return retval; |
1885 | } | |
1886 | ||
c36fc889 PZ |
1887 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1888 | { | |
1889 | struct usbdevfs_ioctl ctrl; | |
1890 | ||
04e482ff | 1891 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1892 | return -EFAULT; |
1893 | return proc_ioctl(ps, &ctrl); | |
1894 | } | |
1895 | ||
1896 | #ifdef CONFIG_COMPAT | |
777da590 | 1897 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1898 | { |
1899 | struct usbdevfs_ioctl32 __user *uioc; | |
1900 | struct usbdevfs_ioctl ctrl; | |
1901 | u32 udata; | |
1902 | ||
058120d7 | 1903 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1904 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1905 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1906 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1907 | __get_user(udata, &uioc->data)) |
1908 | return -EFAULT; | |
1909 | ctrl.data = compat_ptr(udata); | |
1910 | ||
1911 | return proc_ioctl(ps, &ctrl); | |
1912 | } | |
1913 | #endif | |
1914 | ||
7cbe5dca AS |
1915 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1916 | { | |
1917 | unsigned portnum; | |
1918 | int rc; | |
1919 | ||
1920 | if (get_user(portnum, (unsigned __user *) arg)) | |
1921 | return -EFAULT; | |
1922 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1923 | if (rc == 0) | |
1924 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1925 | portnum, task_pid_nr(current), current->comm); | |
1926 | return rc; | |
1927 | } | |
1928 | ||
1929 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1930 | { | |
1931 | unsigned portnum; | |
1932 | ||
1933 | if (get_user(portnum, (unsigned __user *) arg)) | |
1934 | return -EFAULT; | |
1935 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1936 | } | |
1937 | ||
19181bc5 HG |
1938 | static int proc_get_capabilities(struct dev_state *ps, void __user *arg) |
1939 | { | |
1940 | __u32 caps; | |
1941 | ||
1942 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM; | |
1943 | if (!ps->dev->bus->no_stop_on_short) | |
1944 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
1945 | if (ps->dev->bus->sg_tablesize) |
1946 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
1947 | |
1948 | if (put_user(caps, (__u32 __user *)arg)) | |
1949 | return -EFAULT; | |
1950 | ||
1951 | return 0; | |
1952 | } | |
1953 | ||
0837e7e5 HG |
1954 | static int proc_disconnect_claim(struct dev_state *ps, void __user *arg) |
1955 | { | |
1956 | struct usbdevfs_disconnect_claim dc; | |
1957 | struct usb_interface *intf; | |
1958 | ||
1959 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
1960 | return -EFAULT; | |
1961 | ||
1962 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
1963 | if (!intf) | |
1964 | return -EINVAL; | |
1965 | ||
1966 | if (intf->dev.driver) { | |
1967 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
1968 | ||
1969 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && | |
1970 | strncmp(dc.driver, intf->dev.driver->name, | |
1971 | sizeof(dc.driver)) != 0) | |
1972 | return -EBUSY; | |
1973 | ||
1974 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
1975 | strncmp(dc.driver, intf->dev.driver->name, | |
1976 | sizeof(dc.driver)) == 0) | |
1977 | return -EBUSY; | |
1978 | ||
1979 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
1980 | usb_driver_release_interface(driver, intf); | |
1981 | } | |
1982 | ||
1983 | return claimintf(ps, dc.interface); | |
1984 | } | |
1985 | ||
1da177e4 LT |
1986 | /* |
1987 | * NOTE: All requests here that have interface numbers as parameters | |
1988 | * are assuming that somehow the configuration has been prevented from | |
1989 | * changing. But there's no mechanism to ensure that... | |
1990 | */ | |
637e8a60 AB |
1991 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1992 | void __user *p) | |
1da177e4 | 1993 | { |
ec17cf1c | 1994 | struct dev_state *ps = file->private_data; |
496ad9aa | 1995 | struct inode *inode = file_inode(file); |
1da177e4 | 1996 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1997 | int ret = -ENOTTY; |
1998 | ||
1999 | if (!(file->f_mode & FMODE_WRITE)) | |
2000 | return -EPERM; | |
01412a21 | 2001 | |
1da177e4 | 2002 | usb_lock_device(dev); |
349710c3 | 2003 | if (!connected(ps)) { |
1da177e4 LT |
2004 | usb_unlock_device(dev); |
2005 | return -ENODEV; | |
2006 | } | |
2007 | ||
2008 | switch (cmd) { | |
2009 | case USBDEVFS_CONTROL: | |
441b62c1 | 2010 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
2011 | ret = proc_control(ps, p); |
2012 | if (ret >= 0) | |
2013 | inode->i_mtime = CURRENT_TIME; | |
2014 | break; | |
2015 | ||
2016 | case USBDEVFS_BULK: | |
441b62c1 | 2017 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
2018 | ret = proc_bulk(ps, p); |
2019 | if (ret >= 0) | |
2020 | inode->i_mtime = CURRENT_TIME; | |
2021 | break; | |
2022 | ||
2023 | case USBDEVFS_RESETEP: | |
441b62c1 | 2024 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2025 | ret = proc_resetep(ps, p); |
2026 | if (ret >= 0) | |
2027 | inode->i_mtime = CURRENT_TIME; | |
2028 | break; | |
2029 | ||
2030 | case USBDEVFS_RESET: | |
441b62c1 | 2031 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2032 | ret = proc_resetdevice(ps); |
2033 | break; | |
2034 | ||
2035 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2036 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2037 | ret = proc_clearhalt(ps, p); |
2038 | if (ret >= 0) | |
2039 | inode->i_mtime = CURRENT_TIME; | |
2040 | break; | |
2041 | ||
2042 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2043 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2044 | ret = proc_getdriver(ps, p); |
2045 | break; | |
2046 | ||
2047 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2048 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2049 | ret = proc_connectinfo(ps, p); |
2050 | break; | |
2051 | ||
2052 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2053 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2054 | ret = proc_setintf(ps, p); |
2055 | break; | |
2056 | ||
2057 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2058 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2059 | ret = proc_setconfig(ps, p); |
2060 | break; | |
2061 | ||
2062 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2063 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2064 | ret = proc_submiturb(ps, p); |
2065 | if (ret >= 0) | |
2066 | inode->i_mtime = CURRENT_TIME; | |
2067 | break; | |
2068 | ||
2069 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2070 | case USBDEVFS_CONTROL32: |
2071 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2072 | ret = proc_control_compat(ps, p); | |
2073 | if (ret >= 0) | |
2074 | inode->i_mtime = CURRENT_TIME; | |
2075 | break; | |
2076 | ||
2077 | case USBDEVFS_BULK32: | |
2078 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2079 | ret = proc_bulk_compat(ps, p); | |
2080 | if (ret >= 0) | |
2081 | inode->i_mtime = CURRENT_TIME; | |
2082 | break; | |
2083 | ||
2084 | case USBDEVFS_DISCSIGNAL32: | |
2085 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2086 | ret = proc_disconnectsignal_compat(ps, p); | |
2087 | break; | |
1da177e4 LT |
2088 | |
2089 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2090 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2091 | ret = proc_submiturb_compat(ps, p); |
2092 | if (ret >= 0) | |
2093 | inode->i_mtime = CURRENT_TIME; | |
2094 | break; | |
2095 | ||
2096 | case USBDEVFS_REAPURB32: | |
441b62c1 | 2097 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
2098 | ret = proc_reapurb_compat(ps, p); |
2099 | break; | |
2100 | ||
2101 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 2102 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
2103 | ret = proc_reapurbnonblock_compat(ps, p); |
2104 | break; | |
2105 | ||
c36fc889 | 2106 | case USBDEVFS_IOCTL32: |
637e8a60 | 2107 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2108 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2109 | break; |
1da177e4 LT |
2110 | #endif |
2111 | ||
2112 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 2113 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
2114 | ret = proc_unlinkurb(ps, p); |
2115 | break; | |
2116 | ||
2117 | case USBDEVFS_REAPURB: | |
441b62c1 | 2118 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
2119 | ret = proc_reapurb(ps, p); |
2120 | break; | |
2121 | ||
2122 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 2123 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
2124 | ret = proc_reapurbnonblock(ps, p); |
2125 | break; | |
2126 | ||
2127 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 2128 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2129 | ret = proc_disconnectsignal(ps, p); |
2130 | break; | |
2131 | ||
2132 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2133 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2134 | ret = proc_claiminterface(ps, p); |
2135 | break; | |
2136 | ||
2137 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2138 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2139 | ret = proc_releaseinterface(ps, p); |
2140 | break; | |
2141 | ||
2142 | case USBDEVFS_IOCTL: | |
441b62c1 | 2143 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2144 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2145 | break; |
7cbe5dca AS |
2146 | |
2147 | case USBDEVFS_CLAIM_PORT: | |
2148 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2149 | ret = proc_claim_port(ps, p); | |
2150 | break; | |
2151 | ||
2152 | case USBDEVFS_RELEASE_PORT: | |
2153 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2154 | ret = proc_release_port(ps, p); | |
2155 | break; | |
19181bc5 HG |
2156 | case USBDEVFS_GET_CAPABILITIES: |
2157 | ret = proc_get_capabilities(ps, p); | |
2158 | break; | |
0837e7e5 HG |
2159 | case USBDEVFS_DISCONNECT_CLAIM: |
2160 | ret = proc_disconnect_claim(ps, p); | |
2161 | break; | |
1da177e4 LT |
2162 | } |
2163 | usb_unlock_device(dev); | |
2164 | if (ret >= 0) | |
2165 | inode->i_atime = CURRENT_TIME; | |
2166 | return ret; | |
2167 | } | |
2168 | ||
637e8a60 AB |
2169 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2170 | unsigned long arg) | |
2171 | { | |
2172 | int ret; | |
2173 | ||
637e8a60 | 2174 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2175 | |
2176 | return ret; | |
2177 | } | |
2178 | ||
2179 | #ifdef CONFIG_COMPAT | |
2180 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2181 | unsigned long arg) | |
2182 | { | |
2183 | int ret; | |
2184 | ||
637e8a60 | 2185 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2186 | |
2187 | return ret; | |
2188 | } | |
2189 | #endif | |
2190 | ||
1da177e4 | 2191 | /* No kernel lock - fine */ |
04e482ff GKH |
2192 | static unsigned int usbdev_poll(struct file *file, |
2193 | struct poll_table_struct *wait) | |
1da177e4 | 2194 | { |
ec17cf1c TK |
2195 | struct dev_state *ps = file->private_data; |
2196 | unsigned int mask = 0; | |
1da177e4 LT |
2197 | |
2198 | poll_wait(file, &ps->wait, wait); | |
2199 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2200 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2201 | if (!connected(ps)) |
1da177e4 LT |
2202 | mask |= POLLERR | POLLHUP; |
2203 | return mask; | |
2204 | } | |
2205 | ||
9f8b17e6 | 2206 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
2207 | .owner = THIS_MODULE, |
2208 | .llseek = usbdev_lseek, | |
2209 | .read = usbdev_read, | |
2210 | .poll = usbdev_poll, | |
2211 | .unlocked_ioctl = usbdev_ioctl, | |
2212 | #ifdef CONFIG_COMPAT | |
2213 | .compat_ioctl = usbdev_compat_ioctl, | |
2214 | #endif | |
2215 | .open = usbdev_open, | |
2216 | .release = usbdev_release, | |
1da177e4 | 2217 | }; |
fbf82fd2 | 2218 | |
501950d8 | 2219 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
2220 | { |
2221 | struct dev_state *ps; | |
2222 | struct siginfo sinfo; | |
2223 | ||
2224 | while (!list_empty(&udev->filelist)) { | |
2225 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
2226 | destroy_all_async(ps); | |
2227 | wake_up_all(&ps->wait); | |
2228 | list_del_init(&ps->list); | |
2229 | if (ps->discsignr) { | |
2230 | sinfo.si_signo = ps->discsignr; | |
2231 | sinfo.si_errno = EPIPE; | |
2232 | sinfo.si_code = SI_ASYNCIO; | |
2233 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2234 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2235 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2236 | } |
2237 | } | |
2238 | } | |
2239 | ||
501950d8 | 2240 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2241 | unsigned long action, void *dev) |
a7b986b3 GKH |
2242 | { |
2243 | switch (action) { | |
2244 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2245 | break; |
2246 | case USB_DEVICE_REMOVE: | |
501950d8 | 2247 | usbdev_remove(dev); |
a7b986b3 GKH |
2248 | break; |
2249 | } | |
2250 | return NOTIFY_OK; | |
2251 | } | |
2252 | ||
2253 | static struct notifier_block usbdev_nb = { | |
501950d8 | 2254 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2255 | }; |
2256 | ||
7e7654a9 | 2257 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2258 | |
9f8b17e6 | 2259 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2260 | { |
2261 | int retval; | |
2262 | ||
fad21bdf | 2263 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2264 | "usb_device"); |
fbf82fd2 | 2265 | if (retval) { |
69a85942 | 2266 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2267 | goto out; |
2268 | } | |
9f8b17e6 | 2269 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2270 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2271 | if (retval) { |
69a85942 GKH |
2272 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2273 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2274 | goto error_cdev; |
fbf82fd2 | 2275 | } |
501950d8 | 2276 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2277 | out: |
2278 | return retval; | |
a7b986b3 | 2279 | |
a7b986b3 GKH |
2280 | error_cdev: |
2281 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2282 | goto out; | |
fbf82fd2 KS |
2283 | } |
2284 | ||
9f8b17e6 | 2285 | void usb_devio_cleanup(void) |
fbf82fd2 | 2286 | { |
a7b986b3 | 2287 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2288 | cdev_del(&usb_device_cdev); |
fad21bdf | 2289 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2290 | } |