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> |
f7d34b44 | 53 | #include <linux/dma-mapping.h> |
1da177e4 LT |
54 | #include <asm/byteorder.h> |
55 | #include <linux/moduleparam.h> | |
56 | ||
1da177e4 LT |
57 | #include "usb.h" |
58 | ||
fbf82fd2 | 59 | #define USB_MAXBUS 64 |
fa86ad0b | 60 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 61 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 62 | |
4a2a8a2c AS |
63 | /* Mutual exclusion for removal, open, and release */ |
64 | DEFINE_MUTEX(usbfs_mutex); | |
65 | ||
9b6f0c4b | 66 | struct usb_dev_state { |
cd9f0375 AS |
67 | struct list_head list; /* state list */ |
68 | struct usb_device *dev; | |
69 | struct file *file; | |
70 | spinlock_t lock; /* protects the async urb lists */ | |
71 | struct list_head async_pending; | |
72 | struct list_head async_completed; | |
f7d34b44 | 73 | struct list_head memory_list; |
cd9f0375 AS |
74 | wait_queue_head_t wait; /* wake up if a request completed */ |
75 | unsigned int discsignr; | |
76 | struct pid *disc_pid; | |
d178bc3a | 77 | const struct cred *cred; |
cd9f0375 AS |
78 | void __user *disccontext; |
79 | unsigned long ifclaimed; | |
80 | u32 secid; | |
01c6460f | 81 | u32 disabled_bulk_eps; |
d883f52e RG |
82 | bool privileges_dropped; |
83 | unsigned long interface_allowed_mask; | |
cd9f0375 AS |
84 | }; |
85 | ||
f7d34b44 SG |
86 | struct usb_memory { |
87 | struct list_head memlist; | |
88 | int vma_use_count; | |
89 | int urb_use_count; | |
90 | u32 size; | |
91 | void *mem; | |
92 | dma_addr_t dma_handle; | |
93 | unsigned long vm_start; | |
94 | struct usb_dev_state *ps; | |
95 | }; | |
96 | ||
1da177e4 LT |
97 | struct async { |
98 | struct list_head asynclist; | |
9b6f0c4b | 99 | struct usb_dev_state *ps; |
2425c08b | 100 | struct pid *pid; |
d178bc3a | 101 | const struct cred *cred; |
1da177e4 LT |
102 | unsigned int signr; |
103 | unsigned int ifnum; | |
104 | void __user *userbuffer; | |
105 | void __user *userurb; | |
106 | struct urb *urb; | |
f7d34b44 | 107 | struct usb_memory *usbm; |
add1aaea | 108 | unsigned int mem_usage; |
e015268d | 109 | int status; |
7a01955f | 110 | u32 secid; |
01c6460f AS |
111 | u8 bulk_addr; |
112 | u8 bulk_status; | |
1da177e4 LT |
113 | }; |
114 | ||
90ab5ee9 | 115 | static bool usbfs_snoop; |
04e482ff GKH |
116 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
117 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 | 118 | |
0290cc9f AS |
119 | static unsigned usbfs_snoop_max = 65536; |
120 | module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR); | |
121 | MODULE_PARM_DESC(usbfs_snoop_max, | |
122 | "maximum number of bytes to print while snooping"); | |
123 | ||
1da177e4 LT |
124 | #define snoop(dev, format, arg...) \ |
125 | do { \ | |
126 | if (usbfs_snoop) \ | |
f355e830 | 127 | dev_info(dev, format, ## arg); \ |
1da177e4 LT |
128 | } while (0) |
129 | ||
4c6e8971 AS |
130 | enum snoop_when { |
131 | SUBMIT, COMPLETE | |
132 | }; | |
fad21bdf | 133 | |
4c6e8971 | 134 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 135 | |
add1aaea | 136 | /* Limit on the total amount of memory we can allocate for transfers */ |
3f5eb8d5 AS |
137 | static unsigned usbfs_memory_mb = 16; |
138 | module_param(usbfs_memory_mb, uint, 0644); | |
139 | MODULE_PARM_DESC(usbfs_memory_mb, | |
140 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
141 | ||
025d4430 | 142 | /* Hard limit, necessary to avoid arithmetic overflow */ |
3f5eb8d5 | 143 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) |
1da177e4 | 144 | |
add1aaea AS |
145 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
146 | ||
147 | /* Check whether it's okay to allocate more memory for a transfer */ | |
148 | static int usbfs_increase_memory_usage(unsigned amount) | |
149 | { | |
3f5eb8d5 AS |
150 | unsigned lim; |
151 | ||
152 | /* | |
153 | * Convert usbfs_memory_mb to bytes, avoiding overflows. | |
154 | * 0 means use the hard limit (effectively unlimited). | |
155 | */ | |
156 | lim = ACCESS_ONCE(usbfs_memory_mb); | |
157 | if (lim == 0 || lim > (USBFS_XFER_MAX >> 20)) | |
158 | lim = USBFS_XFER_MAX; | |
159 | else | |
160 | lim <<= 20; | |
161 | ||
add1aaea | 162 | atomic_add(amount, &usbfs_memory_usage); |
3f5eb8d5 | 163 | if (atomic_read(&usbfs_memory_usage) <= lim) |
add1aaea AS |
164 | return 0; |
165 | atomic_sub(amount, &usbfs_memory_usage); | |
166 | return -ENOMEM; | |
167 | } | |
168 | ||
169 | /* Memory for a transfer is being deallocated */ | |
170 | static void usbfs_decrease_memory_usage(unsigned amount) | |
171 | { | |
172 | atomic_sub(amount, &usbfs_memory_usage); | |
173 | } | |
4c6e8971 | 174 | |
9b6f0c4b | 175 | static int connected(struct usb_dev_state *ps) |
1da177e4 | 176 | { |
349710c3 AS |
177 | return (!list_empty(&ps->list) && |
178 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
179 | } |
180 | ||
f7d34b44 SG |
181 | static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count) |
182 | { | |
183 | struct usb_dev_state *ps = usbm->ps; | |
184 | unsigned long flags; | |
185 | ||
186 | spin_lock_irqsave(&ps->lock, flags); | |
187 | --*count; | |
188 | if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) { | |
189 | list_del(&usbm->memlist); | |
190 | spin_unlock_irqrestore(&ps->lock, flags); | |
191 | ||
192 | usb_free_coherent(ps->dev, usbm->size, usbm->mem, | |
193 | usbm->dma_handle); | |
194 | usbfs_decrease_memory_usage( | |
195 | usbm->size + sizeof(struct usb_memory)); | |
196 | kfree(usbm); | |
197 | } else { | |
198 | spin_unlock_irqrestore(&ps->lock, flags); | |
199 | } | |
200 | } | |
201 | ||
202 | static void usbdev_vm_open(struct vm_area_struct *vma) | |
203 | { | |
204 | struct usb_memory *usbm = vma->vm_private_data; | |
205 | unsigned long flags; | |
206 | ||
207 | spin_lock_irqsave(&usbm->ps->lock, flags); | |
208 | ++usbm->vma_use_count; | |
209 | spin_unlock_irqrestore(&usbm->ps->lock, flags); | |
210 | } | |
211 | ||
212 | static void usbdev_vm_close(struct vm_area_struct *vma) | |
213 | { | |
214 | struct usb_memory *usbm = vma->vm_private_data; | |
215 | ||
216 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
217 | } | |
218 | ||
10871c13 | 219 | static struct vm_operations_struct usbdev_vm_ops = { |
f7d34b44 SG |
220 | .open = usbdev_vm_open, |
221 | .close = usbdev_vm_close | |
222 | }; | |
223 | ||
224 | static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) | |
225 | { | |
226 | struct usb_memory *usbm = NULL; | |
227 | struct usb_dev_state *ps = file->private_data; | |
228 | size_t size = vma->vm_end - vma->vm_start; | |
229 | void *mem; | |
230 | unsigned long flags; | |
231 | dma_addr_t dma_handle; | |
232 | int ret; | |
233 | ||
234 | ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); | |
235 | if (ret) | |
236 | goto error; | |
237 | ||
238 | usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL); | |
239 | if (!usbm) { | |
240 | ret = -ENOMEM; | |
241 | goto error_decrease_mem; | |
242 | } | |
243 | ||
70f7ca9a JS |
244 | mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN, |
245 | &dma_handle); | |
f7d34b44 SG |
246 | if (!mem) { |
247 | ret = -ENOMEM; | |
248 | goto error_free_usbm; | |
249 | } | |
250 | ||
251 | memset(mem, 0, size); | |
252 | ||
253 | usbm->mem = mem; | |
254 | usbm->dma_handle = dma_handle; | |
255 | usbm->size = size; | |
256 | usbm->ps = ps; | |
257 | usbm->vm_start = vma->vm_start; | |
258 | usbm->vma_use_count = 1; | |
259 | INIT_LIST_HEAD(&usbm->memlist); | |
260 | ||
261 | if (remap_pfn_range(vma, vma->vm_start, | |
262 | virt_to_phys(usbm->mem) >> PAGE_SHIFT, | |
263 | size, vma->vm_page_prot) < 0) { | |
264 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
265 | return -EAGAIN; | |
266 | } | |
267 | ||
268 | vma->vm_flags |= VM_IO; | |
269 | vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP); | |
270 | vma->vm_ops = &usbdev_vm_ops; | |
271 | vma->vm_private_data = usbm; | |
272 | ||
273 | spin_lock_irqsave(&ps->lock, flags); | |
274 | list_add_tail(&usbm->memlist, &ps->memory_list); | |
275 | spin_unlock_irqrestore(&ps->lock, flags); | |
276 | ||
277 | return 0; | |
278 | ||
279 | error_free_usbm: | |
280 | kfree(usbm); | |
281 | error_decrease_mem: | |
282 | usbfs_decrease_memory_usage(size + sizeof(struct usb_memory)); | |
283 | error: | |
284 | return ret; | |
285 | } | |
286 | ||
04e482ff GKH |
287 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
288 | loff_t *ppos) | |
1da177e4 | 289 | { |
9b6f0c4b | 290 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
291 | struct usb_device *dev = ps->dev; |
292 | ssize_t ret = 0; | |
293 | unsigned len; | |
294 | loff_t pos; | |
295 | int i; | |
296 | ||
297 | pos = *ppos; | |
298 | usb_lock_device(dev); | |
349710c3 | 299 | if (!connected(ps)) { |
1da177e4 LT |
300 | ret = -ENODEV; |
301 | goto err; | |
302 | } else if (pos < 0) { | |
303 | ret = -EINVAL; | |
304 | goto err; | |
305 | } | |
306 | ||
307 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
308 | /* 18 bytes - fits on the stack */ |
309 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
310 | |
311 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
312 | le16_to_cpus(&temp_desc.bcdUSB); |
313 | le16_to_cpus(&temp_desc.idVendor); | |
314 | le16_to_cpus(&temp_desc.idProduct); | |
315 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
316 | |
317 | len = sizeof(struct usb_device_descriptor) - pos; | |
318 | if (len > nbytes) | |
319 | len = nbytes; | |
8781ba0a | 320 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
321 | ret = -EFAULT; |
322 | goto err; | |
323 | } | |
1da177e4 LT |
324 | |
325 | *ppos += len; | |
326 | buf += len; | |
327 | nbytes -= len; | |
328 | ret += len; | |
329 | } | |
330 | ||
331 | pos = sizeof(struct usb_device_descriptor); | |
332 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
333 | struct usb_config_descriptor *config = | |
334 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
335 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
336 | ||
337 | if (*ppos < pos + length) { | |
338 | ||
339 | /* The descriptor may claim to be longer than it | |
340 | * really is. Here is the actual allocated length. */ | |
341 | unsigned alloclen = | |
342 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
343 | ||
344 | len = length - (*ppos - pos); | |
345 | if (len > nbytes) | |
346 | len = nbytes; | |
347 | ||
348 | /* Simply don't write (skip over) unallocated parts */ | |
349 | if (alloclen > (*ppos - pos)) { | |
350 | alloclen -= (*ppos - pos); | |
351 | if (copy_to_user(buf, | |
352 | dev->rawdescriptors[i] + (*ppos - pos), | |
353 | min(len, alloclen))) { | |
354 | ret = -EFAULT; | |
355 | goto err; | |
356 | } | |
357 | } | |
358 | ||
359 | *ppos += len; | |
360 | buf += len; | |
361 | nbytes -= len; | |
362 | ret += len; | |
363 | } | |
364 | ||
365 | pos += length; | |
366 | } | |
367 | ||
368 | err: | |
369 | usb_unlock_device(dev); | |
370 | return ret; | |
371 | } | |
372 | ||
373 | /* | |
374 | * async list handling | |
375 | */ | |
376 | ||
377 | static struct async *alloc_async(unsigned int numisoframes) | |
378 | { | |
dd95b814 | 379 | struct async *as; |
0a1ef3b5 | 380 | |
dd95b814 | 381 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
382 | if (!as) |
383 | return NULL; | |
1da177e4 LT |
384 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
385 | if (!as->urb) { | |
386 | kfree(as); | |
387 | return NULL; | |
388 | } | |
04e482ff | 389 | return as; |
1da177e4 LT |
390 | } |
391 | ||
392 | static void free_async(struct async *as) | |
393 | { | |
3d97ff63 HG |
394 | int i; |
395 | ||
2425c08b | 396 | put_pid(as->pid); |
1b41c832 SS |
397 | if (as->cred) |
398 | put_cred(as->cred); | |
3d97ff63 HG |
399 | for (i = 0; i < as->urb->num_sgs; i++) { |
400 | if (sg_page(&as->urb->sg[i])) | |
401 | kfree(sg_virt(&as->urb->sg[i])); | |
402 | } | |
f7d34b44 | 403 | |
3d97ff63 | 404 | kfree(as->urb->sg); |
f7d34b44 SG |
405 | if (as->usbm == NULL) |
406 | kfree(as->urb->transfer_buffer); | |
407 | else | |
408 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
409 | ||
6fd19f4b | 410 | kfree(as->urb->setup_packet); |
1da177e4 | 411 | usb_free_urb(as->urb); |
add1aaea | 412 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 413 | kfree(as); |
1da177e4 LT |
414 | } |
415 | ||
d34d9721 | 416 | static void async_newpending(struct async *as) |
1da177e4 | 417 | { |
9b6f0c4b | 418 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
419 | unsigned long flags; |
420 | ||
421 | spin_lock_irqsave(&ps->lock, flags); | |
422 | list_add_tail(&as->asynclist, &ps->async_pending); | |
423 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
424 | } |
425 | ||
d34d9721 | 426 | static void async_removepending(struct async *as) |
1da177e4 | 427 | { |
9b6f0c4b | 428 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
429 | unsigned long flags; |
430 | ||
431 | spin_lock_irqsave(&ps->lock, flags); | |
432 | list_del_init(&as->asynclist); | |
433 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
434 | } |
435 | ||
9b6f0c4b | 436 | static struct async *async_getcompleted(struct usb_dev_state *ps) |
1da177e4 | 437 | { |
04e482ff GKH |
438 | unsigned long flags; |
439 | struct async *as = NULL; | |
440 | ||
441 | spin_lock_irqsave(&ps->lock, flags); | |
442 | if (!list_empty(&ps->async_completed)) { | |
443 | as = list_entry(ps->async_completed.next, struct async, | |
444 | asynclist); | |
445 | list_del_init(&as->asynclist); | |
446 | } | |
447 | spin_unlock_irqrestore(&ps->lock, flags); | |
448 | return as; | |
1da177e4 LT |
449 | } |
450 | ||
9b6f0c4b | 451 | static struct async *async_getpending(struct usb_dev_state *ps, |
04e482ff | 452 | void __user *userurb) |
1da177e4 | 453 | { |
04e482ff | 454 | struct async *as; |
1da177e4 | 455 | |
1da177e4 LT |
456 | list_for_each_entry(as, &ps->async_pending, asynclist) |
457 | if (as->userurb == userurb) { | |
458 | list_del_init(&as->asynclist); | |
1da177e4 LT |
459 | return as; |
460 | } | |
4e09dcf2 | 461 | |
04e482ff | 462 | return NULL; |
1da177e4 LT |
463 | } |
464 | ||
4c6e8971 AS |
465 | static void snoop_urb(struct usb_device *udev, |
466 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
467 | int timeout_or_status, enum snoop_when when, |
468 | unsigned char *data, unsigned data_len) | |
e639dd3f | 469 | { |
4c6e8971 AS |
470 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
471 | static const char *dirs[] = {"out", "in"}; | |
472 | int ep; | |
473 | const char *t, *d; | |
e639dd3f GKH |
474 | |
475 | if (!usbfs_snoop) | |
476 | return; | |
477 | ||
4c6e8971 AS |
478 | ep = usb_pipeendpoint(pipe); |
479 | t = types[usb_pipetype(pipe)]; | |
480 | d = dirs[!!usb_pipein(pipe)]; | |
481 | ||
482 | if (userurb) { /* Async */ | |
483 | if (when == SUBMIT) | |
484 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
485 | "length %u\n", | |
486 | userurb, ep, t, d, length); | |
487 | else | |
488 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
489 | "actual_length %u status %d\n", | |
490 | userurb, ep, t, d, length, | |
491 | timeout_or_status); | |
492 | } else { | |
493 | if (when == SUBMIT) | |
494 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
495 | "timeout %d\n", | |
496 | ep, t, d, length, timeout_or_status); | |
497 | else | |
498 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
499 | "status %d\n", | |
500 | ep, t, d, length, timeout_or_status); | |
501 | } | |
0880aef4 | 502 | |
0290cc9f | 503 | data_len = min(data_len, usbfs_snoop_max); |
0880aef4 CF |
504 | if (data && data_len > 0) { |
505 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
506 | data, data_len, 1); | |
507 | } | |
e639dd3f GKH |
508 | } |
509 | ||
3d97ff63 HG |
510 | static void snoop_urb_data(struct urb *urb, unsigned len) |
511 | { | |
512 | int i, size; | |
513 | ||
0290cc9f AS |
514 | len = min(len, usbfs_snoop_max); |
515 | if (!usbfs_snoop || len == 0) | |
3d97ff63 HG |
516 | return; |
517 | ||
518 | if (urb->num_sgs == 0) { | |
519 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
520 | urb->transfer_buffer, len, 1); | |
521 | return; | |
522 | } | |
523 | ||
524 | for (i = 0; i < urb->num_sgs && len; i++) { | |
525 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
526 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
527 | sg_virt(&urb->sg[i]), size, 1); | |
528 | len -= size; | |
529 | } | |
530 | } | |
531 | ||
532 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
533 | { | |
534 | unsigned i, len, size; | |
535 | ||
536 | if (urb->number_of_packets > 0) /* Isochronous */ | |
537 | len = urb->transfer_buffer_length; | |
538 | else /* Non-Isoc */ | |
539 | len = urb->actual_length; | |
540 | ||
541 | if (urb->num_sgs == 0) { | |
542 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
543 | return -EFAULT; | |
544 | return 0; | |
545 | } | |
546 | ||
547 | for (i = 0; i < urb->num_sgs && len; i++) { | |
548 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
549 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
550 | return -EFAULT; | |
551 | userbuffer += size; | |
552 | len -= size; | |
553 | } | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
01c6460f AS |
558 | #define AS_CONTINUATION 1 |
559 | #define AS_UNLINK 2 | |
560 | ||
9b6f0c4b | 561 | static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr) |
01c6460f AS |
562 | __releases(ps->lock) |
563 | __acquires(ps->lock) | |
564 | { | |
4e09dcf2 | 565 | struct urb *urb; |
01c6460f AS |
566 | struct async *as; |
567 | ||
568 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
569 | * including the first one without AS_CONTINUATION. If such an | |
570 | * URB is encountered then a new transfer has already started so | |
571 | * the endpoint doesn't need to be disabled; otherwise it does. | |
572 | */ | |
573 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
574 | if (as->bulk_addr == bulk_addr) { | |
575 | if (as->bulk_status != AS_CONTINUATION) | |
576 | goto rescan; | |
577 | as->bulk_status = AS_UNLINK; | |
578 | as->bulk_addr = 0; | |
579 | } | |
580 | } | |
581 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
582 | ||
583 | /* Now carefully unlink all the marked pending URBs */ | |
584 | rescan: | |
585 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
586 | if (as->bulk_status == AS_UNLINK) { | |
587 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
588 | urb = as->urb; |
589 | usb_get_urb(urb); | |
01c6460f | 590 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
591 | usb_unlink_urb(urb); |
592 | usb_put_urb(urb); | |
01c6460f AS |
593 | spin_lock(&ps->lock); |
594 | goto rescan; | |
595 | } | |
596 | } | |
597 | } | |
598 | ||
7d12e780 | 599 | static void async_completed(struct urb *urb) |
1da177e4 | 600 | { |
04e482ff | 601 | struct async *as = urb->context; |
9b6f0c4b | 602 | struct usb_dev_state *ps = as->ps; |
1da177e4 | 603 | struct siginfo sinfo; |
516a1a07 | 604 | struct pid *pid = NULL; |
516a1a07 | 605 | u32 secid = 0; |
d178bc3a | 606 | const struct cred *cred = NULL; |
516a1a07 | 607 | int signr; |
1da177e4 | 608 | |
04e482ff GKH |
609 | spin_lock(&ps->lock); |
610 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 611 | as->status = urb->status; |
516a1a07 ON |
612 | signr = as->signr; |
613 | if (signr) { | |
f0c2b681 | 614 | memset(&sinfo, 0, sizeof(sinfo)); |
1da177e4 | 615 | sinfo.si_signo = as->signr; |
e015268d | 616 | sinfo.si_errno = as->status; |
1da177e4 LT |
617 | sinfo.si_code = SI_ASYNCIO; |
618 | sinfo.si_addr = as->userurb; | |
aec01c58 | 619 | pid = get_pid(as->pid); |
d178bc3a | 620 | cred = get_cred(as->cred); |
516a1a07 | 621 | secid = as->secid; |
1da177e4 | 622 | } |
e639dd3f | 623 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 624 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 | 625 | as->status, COMPLETE, NULL, 0); |
83ed07c5 | 626 | if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN) |
3d97ff63 HG |
627 | snoop_urb_data(urb, urb->actual_length); |
628 | ||
01c6460f AS |
629 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
630 | as->status != -ENOENT) | |
631 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
632 | spin_unlock(&ps->lock); |
633 | ||
aec01c58 | 634 | if (signr) { |
d178bc3a | 635 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 636 | put_pid(pid); |
d178bc3a | 637 | put_cred(cred); |
aec01c58 | 638 | } |
516a1a07 | 639 | |
e639dd3f | 640 | wake_up(&ps->wait); |
1da177e4 LT |
641 | } |
642 | ||
9b6f0c4b | 643 | static void destroy_async(struct usb_dev_state *ps, struct list_head *list) |
1da177e4 | 644 | { |
4e09dcf2 | 645 | struct urb *urb; |
1da177e4 LT |
646 | struct async *as; |
647 | unsigned long flags; | |
648 | ||
649 | spin_lock_irqsave(&ps->lock, flags); | |
650 | while (!list_empty(list)) { | |
651 | as = list_entry(list->next, struct async, asynclist); | |
652 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
653 | urb = as->urb; |
654 | usb_get_urb(urb); | |
1da177e4 LT |
655 | |
656 | /* drop the spinlock so the completion handler can run */ | |
657 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
658 | usb_kill_urb(urb); |
659 | usb_put_urb(urb); | |
1da177e4 LT |
660 | spin_lock_irqsave(&ps->lock, flags); |
661 | } | |
662 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
663 | } |
664 | ||
9b6f0c4b | 665 | static void destroy_async_on_interface(struct usb_dev_state *ps, |
04e482ff | 666 | unsigned int ifnum) |
1da177e4 LT |
667 | { |
668 | struct list_head *p, *q, hitlist; | |
669 | unsigned long flags; | |
670 | ||
671 | INIT_LIST_HEAD(&hitlist); | |
672 | spin_lock_irqsave(&ps->lock, flags); | |
673 | list_for_each_safe(p, q, &ps->async_pending) | |
674 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
675 | list_move_tail(p, &hitlist); | |
676 | spin_unlock_irqrestore(&ps->lock, flags); | |
677 | destroy_async(ps, &hitlist); | |
678 | } | |
679 | ||
9b6f0c4b | 680 | static void destroy_all_async(struct usb_dev_state *ps) |
1da177e4 | 681 | { |
04e482ff | 682 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
683 | } |
684 | ||
685 | /* | |
686 | * interface claims are made only at the request of user level code, | |
687 | * which can also release them (explicitly or by closing files). | |
688 | * they're also undone when devices disconnect. | |
689 | */ | |
690 | ||
04e482ff GKH |
691 | static int driver_probe(struct usb_interface *intf, |
692 | const struct usb_device_id *id) | |
1da177e4 LT |
693 | { |
694 | return -ENODEV; | |
695 | } | |
696 | ||
697 | static void driver_disconnect(struct usb_interface *intf) | |
698 | { | |
9b6f0c4b | 699 | struct usb_dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
700 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
701 | ||
702 | if (!ps) | |
703 | return; | |
704 | ||
705 | /* NOTE: this relies on usbcore having canceled and completed | |
706 | * all pending I/O requests; 2.6 does that. | |
707 | */ | |
708 | ||
709 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
710 | clear_bit(ifnum, &ps->ifclaimed); | |
711 | else | |
3b6004f3 GKH |
712 | dev_warn(&intf->dev, "interface number %u out of range\n", |
713 | ifnum); | |
1da177e4 | 714 | |
04e482ff | 715 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
716 | |
717 | /* force async requests to complete */ | |
718 | destroy_async_on_interface(ps, ifnum); | |
719 | } | |
720 | ||
2e2eb83f AS |
721 | /* The following routines are merely placeholders. There is no way |
722 | * to inform a user task about suspend or resumes. | |
723 | */ | |
724 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
725 | { | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static int driver_resume(struct usb_interface *intf) | |
730 | { | |
731 | return 0; | |
732 | } | |
733 | ||
1da177e4 | 734 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
735 | .name = "usbfs", |
736 | .probe = driver_probe, | |
737 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
738 | .suspend = driver_suspend, |
739 | .resume = driver_resume, | |
1da177e4 LT |
740 | }; |
741 | ||
9b6f0c4b | 742 | static int claimintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
743 | { |
744 | struct usb_device *dev = ps->dev; | |
745 | struct usb_interface *intf; | |
746 | int err; | |
747 | ||
748 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
749 | return -EINVAL; | |
750 | /* already claimed */ | |
751 | if (test_bit(ifnum, &ps->ifclaimed)) | |
752 | return 0; | |
753 | ||
d883f52e RG |
754 | if (ps->privileges_dropped && |
755 | !test_bit(ifnum, &ps->interface_allowed_mask)) | |
756 | return -EACCES; | |
757 | ||
1da177e4 LT |
758 | intf = usb_ifnum_to_if(dev, ifnum); |
759 | if (!intf) | |
760 | err = -ENOENT; | |
761 | else | |
762 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
763 | if (err == 0) |
764 | set_bit(ifnum, &ps->ifclaimed); | |
765 | return err; | |
766 | } | |
767 | ||
9b6f0c4b | 768 | static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
769 | { |
770 | struct usb_device *dev; | |
771 | struct usb_interface *intf; | |
772 | int err; | |
773 | ||
774 | err = -EINVAL; | |
775 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
776 | return err; | |
777 | dev = ps->dev; | |
1da177e4 LT |
778 | intf = usb_ifnum_to_if(dev, ifnum); |
779 | if (!intf) | |
780 | err = -ENOENT; | |
781 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
782 | usb_driver_release_interface(&usbfs_driver, intf); | |
783 | err = 0; | |
784 | } | |
1da177e4 LT |
785 | return err; |
786 | } | |
787 | ||
9b6f0c4b | 788 | static int checkintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
789 | { |
790 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
791 | return -EHOSTUNREACH; | |
792 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
793 | return -EINVAL; | |
794 | if (test_bit(ifnum, &ps->ifclaimed)) | |
795 | return 0; | |
796 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
797 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
798 | "interface %u before use\n", task_pid_nr(current), | |
799 | current->comm, ifnum); | |
1da177e4 LT |
800 | return claimintf(ps, ifnum); |
801 | } | |
802 | ||
803 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
804 | { | |
805 | unsigned int i, j, e; | |
04e482ff | 806 | struct usb_interface *intf; |
1da177e4 LT |
807 | struct usb_host_interface *alts; |
808 | struct usb_endpoint_descriptor *endpt; | |
809 | ||
810 | if (ep & ~(USB_DIR_IN|0xf)) | |
811 | return -EINVAL; | |
812 | if (!dev->actconfig) | |
813 | return -ESRCH; | |
814 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
815 | intf = dev->actconfig->interface[i]; | |
816 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 817 | alts = &intf->altsetting[j]; |
1da177e4 LT |
818 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
819 | endpt = &alts->endpoint[e].desc; | |
820 | if (endpt->bEndpointAddress == ep) | |
821 | return alts->desc.bInterfaceNumber; | |
822 | } | |
823 | } | |
824 | } | |
04e482ff | 825 | return -ENOENT; |
1da177e4 LT |
826 | } |
827 | ||
9b6f0c4b | 828 | static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype, |
393cbb51 | 829 | unsigned int request, unsigned int index) |
1da177e4 LT |
830 | { |
831 | int ret = 0; | |
393cbb51 | 832 | struct usb_host_interface *alt_setting; |
1da177e4 | 833 | |
6da9c990 DV |
834 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
835 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 836 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
837 | return -EHOSTUNREACH; |
838 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
839 | return 0; | |
840 | ||
393cbb51 MD |
841 | /* |
842 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
843 | * class specification, which we always want to allow as it is used |
844 | * to query things like ink level, etc. | |
393cbb51 MD |
845 | */ |
846 | if (requesttype == 0xa1 && request == 0) { | |
847 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
848 | index >> 8, index & 0xff); | |
849 | if (alt_setting | |
850 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 851 | return 0; |
393cbb51 MD |
852 | } |
853 | ||
1da177e4 LT |
854 | index &= 0xff; |
855 | switch (requesttype & USB_RECIP_MASK) { | |
856 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
857 | if ((index & ~USB_DIR_IN) == 0) |
858 | return 0; | |
04e482ff | 859 | ret = findintfep(ps->dev, index); |
831abf76 KG |
860 | if (ret < 0) { |
861 | /* | |
862 | * Some not fully compliant Win apps seem to get | |
863 | * index wrong and have the endpoint number here | |
864 | * rather than the endpoint address (with the | |
865 | * correct direction). Win does let this through, | |
866 | * so we'll not reject it here but leave it to | |
867 | * the device to not break KVM. But we warn. | |
868 | */ | |
869 | ret = findintfep(ps->dev, index ^ 0x80); | |
870 | if (ret >= 0) | |
871 | dev_info(&ps->dev->dev, | |
872 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
873 | __func__, task_pid_nr(current), | |
874 | current->comm, index, index ^ 0x80); | |
875 | } | |
04e482ff | 876 | if (ret >= 0) |
1da177e4 LT |
877 | ret = checkintf(ps, ret); |
878 | break; | |
879 | ||
880 | case USB_RECIP_INTERFACE: | |
881 | ret = checkintf(ps, index); | |
882 | break; | |
883 | } | |
884 | return ret; | |
885 | } | |
886 | ||
2fec32b0 HG |
887 | static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev, |
888 | unsigned char ep) | |
889 | { | |
890 | if (ep & USB_ENDPOINT_DIR_MASK) | |
891 | return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK]; | |
892 | else | |
893 | return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK]; | |
894 | } | |
895 | ||
3e75c6de | 896 | static int parse_usbdevfs_streams(struct usb_dev_state *ps, |
bcf7f6e3 HG |
897 | struct usbdevfs_streams __user *streams, |
898 | unsigned int *num_streams_ret, | |
899 | unsigned int *num_eps_ret, | |
900 | struct usb_host_endpoint ***eps_ret, | |
901 | struct usb_interface **intf_ret) | |
902 | { | |
903 | unsigned int i, num_streams, num_eps; | |
904 | struct usb_host_endpoint **eps; | |
905 | struct usb_interface *intf = NULL; | |
906 | unsigned char ep; | |
907 | int ifnum, ret; | |
908 | ||
909 | if (get_user(num_streams, &streams->num_streams) || | |
910 | get_user(num_eps, &streams->num_eps)) | |
911 | return -EFAULT; | |
912 | ||
913 | if (num_eps < 1 || num_eps > USB_MAXENDPOINTS) | |
914 | return -EINVAL; | |
915 | ||
916 | /* The XHCI controller allows max 2 ^ 16 streams */ | |
917 | if (num_streams_ret && (num_streams < 2 || num_streams > 65536)) | |
918 | return -EINVAL; | |
919 | ||
920 | eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL); | |
921 | if (!eps) | |
922 | return -ENOMEM; | |
923 | ||
924 | for (i = 0; i < num_eps; i++) { | |
925 | if (get_user(ep, &streams->eps[i])) { | |
926 | ret = -EFAULT; | |
927 | goto error; | |
928 | } | |
929 | eps[i] = ep_to_host_endpoint(ps->dev, ep); | |
930 | if (!eps[i]) { | |
931 | ret = -EINVAL; | |
932 | goto error; | |
933 | } | |
934 | ||
935 | /* usb_alloc/free_streams operate on an usb_interface */ | |
936 | ifnum = findintfep(ps->dev, ep); | |
937 | if (ifnum < 0) { | |
938 | ret = ifnum; | |
939 | goto error; | |
940 | } | |
941 | ||
942 | if (i == 0) { | |
943 | ret = checkintf(ps, ifnum); | |
944 | if (ret < 0) | |
945 | goto error; | |
946 | intf = usb_ifnum_to_if(ps->dev, ifnum); | |
947 | } else { | |
948 | /* Verify all eps belong to the same interface */ | |
949 | if (ifnum != intf->altsetting->desc.bInterfaceNumber) { | |
950 | ret = -EINVAL; | |
951 | goto error; | |
952 | } | |
953 | } | |
954 | } | |
955 | ||
956 | if (num_streams_ret) | |
957 | *num_streams_ret = num_streams; | |
958 | *num_eps_ret = num_eps; | |
959 | *eps_ret = eps; | |
960 | *intf_ret = intf; | |
961 | ||
962 | return 0; | |
963 | ||
964 | error: | |
965 | kfree(eps); | |
966 | return ret; | |
967 | } | |
968 | ||
61ad04a8 | 969 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 970 | { |
a80d5ff0 | 971 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 972 | } |
4592bf5a | 973 | |
61ad04a8 | 974 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
975 | { |
976 | struct device *dev; | |
977 | ||
a80d5ff0 DH |
978 | dev = bus_find_device(&usb_bus_type, NULL, |
979 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
980 | if (!dev) |
981 | return NULL; | |
69ab55d7 | 982 | return to_usb_device(dev); |
9f8b17e6 | 983 | } |
4592bf5a | 984 | |
1da177e4 LT |
985 | /* |
986 | * file operations | |
987 | */ | |
988 | static int usbdev_open(struct inode *inode, struct file *file) | |
989 | { | |
fbf82fd2 | 990 | struct usb_device *dev = NULL; |
9b6f0c4b | 991 | struct usb_dev_state *ps; |
1da177e4 LT |
992 | int ret; |
993 | ||
1da177e4 | 994 | ret = -ENOMEM; |
d883f52e | 995 | ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL); |
04e482ff | 996 | if (!ps) |
62e299e6 | 997 | goto out_free_ps; |
1da177e4 | 998 | |
01105a24 | 999 | ret = -ENODEV; |
61ad04a8 | 1000 | |
62e299e6 AS |
1001 | /* Protect against simultaneous removal or release */ |
1002 | mutex_lock(&usbfs_mutex); | |
1003 | ||
9f8b17e6 | 1004 | /* usbdev device-node */ |
fbf82fd2 | 1005 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 1006 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 1007 | |
62e299e6 AS |
1008 | mutex_unlock(&usbfs_mutex); |
1009 | ||
1010 | if (!dev) | |
1011 | goto out_free_ps; | |
1012 | ||
1013 | usb_lock_device(dev); | |
1014 | if (dev->state == USB_STATE_NOTATTACHED) | |
1015 | goto out_unlock_device; | |
1016 | ||
94fcda1f | 1017 | ret = usb_autoresume_device(dev); |
01d883d4 | 1018 | if (ret) |
62e299e6 | 1019 | goto out_unlock_device; |
01d883d4 | 1020 | |
1da177e4 LT |
1021 | ps->dev = dev; |
1022 | ps->file = file; | |
d883f52e | 1023 | ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */ |
1da177e4 | 1024 | spin_lock_init(&ps->lock); |
316547fd | 1025 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
1026 | INIT_LIST_HEAD(&ps->async_pending); |
1027 | INIT_LIST_HEAD(&ps->async_completed); | |
f7d34b44 | 1028 | INIT_LIST_HEAD(&ps->memory_list); |
1da177e4 | 1029 | init_waitqueue_head(&ps->wait); |
2425c08b | 1030 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 1031 | ps->cred = get_current_cred(); |
7a01955f | 1032 | security_task_getsecid(current, &ps->secid); |
527660a8 | 1033 | smp_wmb(); |
1da177e4 LT |
1034 | list_add_tail(&ps->list, &dev->filelist); |
1035 | file->private_data = ps; | |
62e299e6 | 1036 | usb_unlock_device(dev); |
2da41d5f AS |
1037 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
1038 | current->comm); | |
62e299e6 AS |
1039 | return ret; |
1040 | ||
1041 | out_unlock_device: | |
1042 | usb_unlock_device(dev); | |
1043 | usb_put_dev(dev); | |
1044 | out_free_ps: | |
1045 | kfree(ps); | |
4a2a8a2c | 1046 | return ret; |
1da177e4 LT |
1047 | } |
1048 | ||
1049 | static int usbdev_release(struct inode *inode, struct file *file) | |
1050 | { | |
9b6f0c4b | 1051 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
1052 | struct usb_device *dev = ps->dev; |
1053 | unsigned int ifnum; | |
6ff10464 | 1054 | struct async *as; |
1da177e4 LT |
1055 | |
1056 | usb_lock_device(dev); | |
7cbe5dca | 1057 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 1058 | |
1da177e4 | 1059 | list_del_init(&ps->list); |
4a2a8a2c | 1060 | |
1da177e4 LT |
1061 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
1062 | ifnum++) { | |
1063 | if (test_bit(ifnum, &ps->ifclaimed)) | |
1064 | releaseintf(ps, ifnum); | |
1065 | } | |
1066 | destroy_all_async(ps); | |
94fcda1f | 1067 | usb_autosuspend_device(dev); |
1da177e4 LT |
1068 | usb_unlock_device(dev); |
1069 | usb_put_dev(dev); | |
2425c08b | 1070 | put_pid(ps->disc_pid); |
d178bc3a | 1071 | put_cred(ps->cred); |
6ff10464 AS |
1072 | |
1073 | as = async_getcompleted(ps); | |
1074 | while (as) { | |
1075 | free_async(as); | |
1076 | as = async_getcompleted(ps); | |
1077 | } | |
f7d34b44 | 1078 | |
1da177e4 | 1079 | kfree(ps); |
4a2a8a2c | 1080 | return 0; |
1da177e4 LT |
1081 | } |
1082 | ||
9b6f0c4b | 1083 | static int proc_control(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1084 | { |
1085 | struct usb_device *dev = ps->dev; | |
1086 | struct usbdevfs_ctrltransfer ctrl; | |
1087 | unsigned int tmo; | |
1088 | unsigned char *tbuf; | |
ff66e3ce | 1089 | unsigned wLength; |
4c6e8971 | 1090 | int i, pipe, ret; |
1da177e4 LT |
1091 | |
1092 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1093 | return -EFAULT; | |
393cbb51 MD |
1094 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
1095 | ctrl.wIndex); | |
04e482ff | 1096 | if (ret) |
1da177e4 | 1097 | return ret; |
ff66e3ce AM |
1098 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
1099 | if (wLength > PAGE_SIZE) | |
1da177e4 | 1100 | return -EINVAL; |
add1aaea AS |
1101 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1102 | sizeof(struct usb_ctrlrequest)); | |
1103 | if (ret) | |
1104 | return ret; | |
04e482ff | 1105 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
1106 | if (!tbuf) { |
1107 | ret = -ENOMEM; | |
1108 | goto done; | |
1109 | } | |
1da177e4 | 1110 | tmo = ctrl.timeout; |
0880aef4 CF |
1111 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
1112 | "bRequest=%02x wValue=%04x " | |
1113 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
1114 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
1115 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 1116 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
1117 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
1118 | ctrl.wLength)) { | |
52fb743d AS |
1119 | ret = -EINVAL; |
1120 | goto done; | |
1da177e4 | 1121 | } |
4c6e8971 | 1122 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 1123 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
1124 | |
1125 | usb_unlock_device(dev); | |
4c6e8971 | 1126 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
1127 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
1128 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1129 | usb_lock_device(dev); |
0880aef4 | 1130 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 1131 | tbuf, max(i, 0)); |
1da177e4 | 1132 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 1133 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
1134 | ret = -EFAULT; |
1135 | goto done; | |
1da177e4 LT |
1136 | } |
1137 | } | |
1138 | } else { | |
1139 | if (ctrl.wLength) { | |
1140 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
1141 | ret = -EFAULT; |
1142 | goto done; | |
1da177e4 LT |
1143 | } |
1144 | } | |
4c6e8971 | 1145 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
1146 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
1147 | tbuf, ctrl.wLength); | |
4c6e8971 | 1148 | |
1da177e4 | 1149 | usb_unlock_device(dev); |
04e482ff GKH |
1150 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
1151 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
1152 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1153 | usb_lock_device(dev); |
0880aef4 | 1154 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 1155 | } |
04e482ff | 1156 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
1157 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
1158 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
1159 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
1160 | ctrl.wLength, i); | |
1161 | } | |
52fb743d AS |
1162 | ret = i; |
1163 | done: | |
1164 | free_page((unsigned long) tbuf); | |
add1aaea AS |
1165 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1166 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 1167 | return ret; |
1da177e4 LT |
1168 | } |
1169 | ||
9b6f0c4b | 1170 | static int proc_bulk(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1171 | { |
1172 | struct usb_device *dev = ps->dev; | |
1173 | struct usbdevfs_bulktransfer bulk; | |
1174 | unsigned int tmo, len1, pipe; | |
1175 | int len2; | |
1176 | unsigned char *tbuf; | |
4c6e8971 | 1177 | int i, ret; |
1da177e4 LT |
1178 | |
1179 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
1180 | return -EFAULT; | |
04e482ff GKH |
1181 | ret = findintfep(ps->dev, bulk.ep); |
1182 | if (ret < 0) | |
1da177e4 | 1183 | return ret; |
04e482ff GKH |
1184 | ret = checkintf(ps, ret); |
1185 | if (ret) | |
1da177e4 LT |
1186 | return ret; |
1187 | if (bulk.ep & USB_DIR_IN) | |
1188 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
1189 | else | |
1190 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
1191 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
1192 | return -EINVAL; | |
1193 | len1 = bulk.len; | |
3f5eb8d5 | 1194 | if (len1 >= USBFS_XFER_MAX) |
1da177e4 | 1195 | return -EINVAL; |
add1aaea AS |
1196 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1197 | if (ret) | |
1198 | return ret; | |
135551ea KB |
1199 | tbuf = kmalloc(len1, GFP_KERNEL); |
1200 | if (!tbuf) { | |
add1aaea AS |
1201 | ret = -ENOMEM; |
1202 | goto done; | |
1203 | } | |
1da177e4 LT |
1204 | tmo = bulk.timeout; |
1205 | if (bulk.ep & 0x80) { | |
1206 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
1207 | ret = -EINVAL; |
1208 | goto done; | |
1da177e4 | 1209 | } |
0880aef4 | 1210 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1211 | |
1da177e4 LT |
1212 | usb_unlock_device(dev); |
1213 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1214 | usb_lock_device(dev); | |
0880aef4 | 1215 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1216 | |
1da177e4 LT |
1217 | if (!i && len2) { |
1218 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1219 | ret = -EFAULT; |
1220 | goto done; | |
1da177e4 LT |
1221 | } |
1222 | } | |
1223 | } else { | |
1224 | if (len1) { | |
1225 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1226 | ret = -EFAULT; |
1227 | goto done; | |
1da177e4 LT |
1228 | } |
1229 | } | |
0880aef4 | 1230 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1231 | |
1da177e4 LT |
1232 | usb_unlock_device(dev); |
1233 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1234 | usb_lock_device(dev); | |
0880aef4 | 1235 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1236 | } |
52fb743d AS |
1237 | ret = (i < 0 ? i : len2); |
1238 | done: | |
1da177e4 | 1239 | kfree(tbuf); |
add1aaea | 1240 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1241 | return ret; |
1da177e4 LT |
1242 | } |
1243 | ||
f080a51b AS |
1244 | static void check_reset_of_active_ep(struct usb_device *udev, |
1245 | unsigned int epnum, char *ioctl_name) | |
1246 | { | |
1247 | struct usb_host_endpoint **eps; | |
1248 | struct usb_host_endpoint *ep; | |
1249 | ||
1250 | eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out; | |
1251 | ep = eps[epnum & 0x0f]; | |
1252 | if (ep && !list_empty(&ep->urb_list)) | |
1253 | dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n", | |
1254 | task_pid_nr(current), current->comm, | |
1255 | ioctl_name, epnum); | |
1256 | } | |
1257 | ||
9b6f0c4b | 1258 | static int proc_resetep(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1259 | { |
1260 | unsigned int ep; | |
1261 | int ret; | |
1262 | ||
1263 | if (get_user(ep, (unsigned int __user *)arg)) | |
1264 | return -EFAULT; | |
04e482ff GKH |
1265 | ret = findintfep(ps->dev, ep); |
1266 | if (ret < 0) | |
1da177e4 | 1267 | return ret; |
04e482ff GKH |
1268 | ret = checkintf(ps, ret); |
1269 | if (ret) | |
1da177e4 | 1270 | return ret; |
f080a51b | 1271 | check_reset_of_active_ep(ps->dev, ep, "RESETEP"); |
3444b26a | 1272 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1273 | return 0; |
1274 | } | |
1275 | ||
9b6f0c4b | 1276 | static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1277 | { |
1278 | unsigned int ep; | |
1279 | int pipe; | |
1280 | int ret; | |
1281 | ||
1282 | if (get_user(ep, (unsigned int __user *)arg)) | |
1283 | return -EFAULT; | |
04e482ff GKH |
1284 | ret = findintfep(ps->dev, ep); |
1285 | if (ret < 0) | |
1da177e4 | 1286 | return ret; |
04e482ff GKH |
1287 | ret = checkintf(ps, ret); |
1288 | if (ret) | |
1da177e4 | 1289 | return ret; |
f080a51b | 1290 | check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT"); |
1da177e4 | 1291 | if (ep & USB_DIR_IN) |
04e482ff GKH |
1292 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1293 | else | |
1294 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1295 | |
1296 | return usb_clear_halt(ps->dev, pipe); | |
1297 | } | |
1da177e4 | 1298 | |
9b6f0c4b | 1299 | static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1300 | { |
1301 | struct usbdevfs_getdriver gd; | |
1302 | struct usb_interface *intf; | |
1303 | int ret; | |
1304 | ||
1305 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1306 | return -EFAULT; | |
1da177e4 LT |
1307 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1308 | if (!intf || !intf->dev.driver) | |
1309 | ret = -ENODATA; | |
1310 | else { | |
b11b2e1b | 1311 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1312 | sizeof(gd.driver)); |
1313 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1314 | } | |
1da177e4 LT |
1315 | return ret; |
1316 | } | |
1317 | ||
9b6f0c4b | 1318 | static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1319 | { |
681fef83 KL |
1320 | struct usbdevfs_connectinfo ci; |
1321 | ||
1322 | memset(&ci, 0, sizeof(ci)); | |
1323 | ci.devnum = ps->dev->devnum; | |
1324 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
1da177e4 | 1325 | |
1da177e4 LT |
1326 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1327 | return -EFAULT; | |
1328 | return 0; | |
1329 | } | |
1330 | ||
9b6f0c4b | 1331 | static int proc_resetdevice(struct usb_dev_state *ps) |
1da177e4 | 1332 | { |
d883f52e RG |
1333 | struct usb_host_config *actconfig = ps->dev->actconfig; |
1334 | struct usb_interface *interface; | |
1335 | int i, number; | |
1336 | ||
1337 | /* Don't allow a device reset if the process has dropped the | |
1338 | * privilege to do such things and any of the interfaces are | |
1339 | * currently claimed. | |
1340 | */ | |
1341 | if (ps->privileges_dropped && actconfig) { | |
1342 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1343 | interface = actconfig->interface[i]; | |
1344 | number = interface->cur_altsetting->desc.bInterfaceNumber; | |
1345 | if (usb_interface_claimed(interface) && | |
1346 | !test_bit(number, &ps->ifclaimed)) { | |
1347 | dev_warn(&ps->dev->dev, | |
1348 | "usbfs: interface %d claimed by %s while '%s' resets device\n", | |
1349 | number, interface->dev.driver->name, current->comm); | |
1350 | return -EACCES; | |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | ||
742120c6 | 1355 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1356 | } |
1357 | ||
9b6f0c4b | 1358 | static int proc_setintf(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1359 | { |
1360 | struct usbdevfs_setinterface setintf; | |
1361 | int ret; | |
1362 | ||
1363 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1364 | return -EFAULT; | |
135551ea KB |
1365 | ret = checkintf(ps, setintf.interface); |
1366 | if (ret) | |
1da177e4 | 1367 | return ret; |
5ec9c177 HG |
1368 | |
1369 | destroy_async_on_interface(ps, setintf.interface); | |
1370 | ||
1da177e4 LT |
1371 | return usb_set_interface(ps->dev, setintf.interface, |
1372 | setintf.altsetting); | |
1373 | } | |
1374 | ||
9b6f0c4b | 1375 | static int proc_setconfig(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1376 | { |
3f141e2a | 1377 | int u; |
1da177e4 | 1378 | int status = 0; |
04e482ff | 1379 | struct usb_host_config *actconfig; |
1da177e4 | 1380 | |
3f141e2a | 1381 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1382 | return -EFAULT; |
1383 | ||
04e482ff GKH |
1384 | actconfig = ps->dev->actconfig; |
1385 | ||
1386 | /* Don't touch the device if any interfaces are claimed. | |
1387 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1388 | * an interface is claimed by usbfs it could easily deadlock. |
1389 | */ | |
04e482ff GKH |
1390 | if (actconfig) { |
1391 | int i; | |
1392 | ||
1393 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1394 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1395 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1396 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1397 | "while '%s' sets config #%d\n", |
1398 | actconfig->interface[i] | |
1399 | ->cur_altsetting | |
1400 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1401 | actconfig->interface[i] |
1402 | ->dev.driver->name, | |
1da177e4 | 1403 | current->comm, u); |
04e482ff | 1404 | status = -EBUSY; |
1da177e4 | 1405 | break; |
1da177e4 | 1406 | } |
04e482ff GKH |
1407 | } |
1408 | } | |
1da177e4 LT |
1409 | |
1410 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1411 | * so avoid usb_set_configuration()'s kick to sysfs | |
1412 | */ | |
1413 | if (status == 0) { | |
1414 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1415 | status = usb_reset_configuration(ps->dev); | |
1416 | else | |
1417 | status = usb_set_configuration(ps->dev, u); | |
1418 | } | |
1419 | ||
1420 | return status; | |
1421 | } | |
1422 | ||
f7d34b44 SG |
1423 | static struct usb_memory * |
1424 | find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb) | |
1425 | { | |
1426 | struct usb_memory *usbm = NULL, *iter; | |
1427 | unsigned long flags; | |
1428 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1429 | ||
1430 | spin_lock_irqsave(&ps->lock, flags); | |
1431 | list_for_each_entry(iter, &ps->memory_list, memlist) { | |
1432 | if (uurb_start >= iter->vm_start && | |
1433 | uurb_start < iter->vm_start + iter->size) { | |
1434 | if (uurb->buffer_length > iter->vm_start + iter->size - | |
1435 | uurb_start) { | |
1436 | usbm = ERR_PTR(-EINVAL); | |
1437 | } else { | |
1438 | usbm = iter; | |
1439 | usbm->urb_use_count++; | |
1440 | } | |
1441 | break; | |
1442 | } | |
1443 | } | |
1444 | spin_unlock_irqrestore(&ps->lock, flags); | |
1445 | return usbm; | |
1446 | } | |
1447 | ||
9b6f0c4b | 1448 | static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1449 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1450 | void __user *arg) | |
1da177e4 LT |
1451 | { |
1452 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1453 | struct usb_host_endpoint *ep; | |
52fb743d | 1454 | struct async *as = NULL; |
1da177e4 LT |
1455 | struct usb_ctrlrequest *dr = NULL; |
1456 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 | 1457 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
b2d03eb5 | 1458 | int number_of_packets = 0; |
948cd8c1 | 1459 | unsigned int stream_id = 0; |
3d97ff63 | 1460 | void *buf; |
1da177e4 | 1461 | |
14722ef4 AS |
1462 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1463 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1464 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1465 | USBDEVFS_URB_NO_FSBR | |
1466 | USBDEVFS_URB_ZERO_PACKET | | |
1467 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1468 | return -EINVAL; |
9180135b | 1469 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1470 | return -EINVAL; |
04e482ff GKH |
1471 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1472 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1473 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1474 | if (ifnum < 0) | |
1da177e4 | 1475 | return ifnum; |
04e482ff GKH |
1476 | ret = checkintf(ps, ifnum); |
1477 | if (ret) | |
1da177e4 LT |
1478 | return ret; |
1479 | } | |
2fec32b0 | 1480 | ep = ep_to_host_endpoint(ps->dev, uurb->endpoint); |
1da177e4 LT |
1481 | if (!ep) |
1482 | return -ENOENT; | |
2fec32b0 | 1483 | is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0; |
add1aaea AS |
1484 | |
1485 | u = 0; | |
f355e830 | 1486 | switch (uurb->type) { |
1da177e4 | 1487 | case USBDEVFS_URB_TYPE_CONTROL: |
93cf9b90 | 1488 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1489 | return -EINVAL; |
add1aaea AS |
1490 | /* min 8 byte setup packet */ |
1491 | if (uurb->buffer_length < 8) | |
1da177e4 | 1492 | return -EINVAL; |
04e482ff GKH |
1493 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1494 | if (!dr) | |
1da177e4 LT |
1495 | return -ENOMEM; |
1496 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1497 | ret = -EFAULT; |
1498 | goto error; | |
1da177e4 LT |
1499 | } |
1500 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1501 | ret = -EINVAL; |
1502 | goto error; | |
1da177e4 | 1503 | } |
393cbb51 | 1504 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1505 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1506 | if (ret) |
1507 | goto error; | |
1da177e4 LT |
1508 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
1509 | uurb->buffer += 8; | |
93cf9b90 AS |
1510 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1511 | is_in = 1; | |
1512 | uurb->endpoint |= USB_DIR_IN; | |
1513 | } else { | |
1514 | is_in = 0; | |
1515 | uurb->endpoint &= ~USB_DIR_IN; | |
1516 | } | |
0880aef4 CF |
1517 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1518 | "bRequest=%02x wValue=%04x " | |
1519 | "wIndex=%04x wLength=%04x\n", | |
1520 | dr->bRequestType, dr->bRequest, | |
1521 | __le16_to_cpup(&dr->wValue), | |
1522 | __le16_to_cpup(&dr->wIndex), | |
1523 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1524 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1525 | break; |
1526 | ||
1527 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1528 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1529 | case USB_ENDPOINT_XFER_CONTROL: |
1530 | case USB_ENDPOINT_XFER_ISOC: | |
1531 | return -EINVAL; | |
f661c6f8 AS |
1532 | case USB_ENDPOINT_XFER_INT: |
1533 | /* allow single-shot interrupt transfers */ | |
1534 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1535 | goto interrupt_urb; | |
1da177e4 | 1536 | } |
3d97ff63 HG |
1537 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1538 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1539 | num_sgs = 0; | |
948cd8c1 HG |
1540 | if (ep->streams) |
1541 | stream_id = uurb->stream_id; | |
1da177e4 LT |
1542 | break; |
1543 | ||
f661c6f8 AS |
1544 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1545 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1546 | return -EINVAL; | |
1547 | interrupt_urb: | |
f661c6f8 AS |
1548 | break; |
1549 | ||
1da177e4 LT |
1550 | case USBDEVFS_URB_TYPE_ISO: |
1551 | /* arbitrary limit */ | |
04e482ff GKH |
1552 | if (uurb->number_of_packets < 1 || |
1553 | uurb->number_of_packets > 128) | |
1da177e4 | 1554 | return -EINVAL; |
93cf9b90 | 1555 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1556 | return -EINVAL; |
b2d03eb5 | 1557 | number_of_packets = uurb->number_of_packets; |
04e482ff | 1558 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
b2d03eb5 | 1559 | number_of_packets; |
73a02d32 RP |
1560 | isopkt = memdup_user(iso_frame_desc, isofrmlen); |
1561 | if (IS_ERR(isopkt)) { | |
1562 | ret = PTR_ERR(isopkt); | |
1563 | isopkt = NULL; | |
52fb743d | 1564 | goto error; |
1da177e4 | 1565 | } |
b2d03eb5 | 1566 | for (totlen = u = 0; u < number_of_packets; u++) { |
e2e2f0ea FM |
1567 | /* |
1568 | * arbitrary limit need for USB 3.0 | |
1569 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1570 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1571 | * sizemax: 1024 * 16 * 3 = 49152 | |
1572 | */ | |
1573 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1574 | ret = -EINVAL; |
1575 | goto error; | |
1da177e4 LT |
1576 | } |
1577 | totlen += isopkt[u].length; | |
1578 | } | |
add1aaea | 1579 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1580 | uurb->buffer_length = totlen; |
1581 | break; | |
1582 | ||
1da177e4 LT |
1583 | default: |
1584 | return -EINVAL; | |
1585 | } | |
add1aaea | 1586 | |
3f5eb8d5 | 1587 | if (uurb->buffer_length >= USBFS_XFER_MAX) { |
add1aaea AS |
1588 | ret = -EINVAL; |
1589 | goto error; | |
1590 | } | |
9180135b AS |
1591 | if (uurb->buffer_length > 0 && |
1592 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1593 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1594 | ret = -EFAULT; |
1595 | goto error; | |
1da177e4 | 1596 | } |
b2d03eb5 | 1597 | as = alloc_async(number_of_packets); |
9180135b | 1598 | if (!as) { |
52fb743d AS |
1599 | ret = -ENOMEM; |
1600 | goto error; | |
1da177e4 | 1601 | } |
3d97ff63 | 1602 | |
f7d34b44 SG |
1603 | as->usbm = find_memory_area(ps, uurb); |
1604 | if (IS_ERR(as->usbm)) { | |
1605 | ret = PTR_ERR(as->usbm); | |
1606 | as->usbm = NULL; | |
1607 | goto error; | |
1608 | } | |
1609 | ||
1610 | /* do not use SG buffers when memory mapped segments | |
1611 | * are in use | |
1612 | */ | |
1613 | if (as->usbm) | |
1614 | num_sgs = 0; | |
1615 | ||
3d97ff63 HG |
1616 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + |
1617 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1618 | ret = usbfs_increase_memory_usage(u); |
1619 | if (ret) | |
1620 | goto error; | |
1621 | as->mem_usage = u; | |
1622 | ||
3d97ff63 HG |
1623 | if (num_sgs) { |
1624 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1625 | GFP_KERNEL); | |
1626 | if (!as->urb->sg) { | |
1627 | ret = -ENOMEM; | |
1628 | goto error; | |
1629 | } | |
1630 | as->urb->num_sgs = num_sgs; | |
1631 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1632 | ||
1633 | totlen = uurb->buffer_length; | |
1634 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1635 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1636 | buf = kmalloc(u, GFP_KERNEL); | |
1637 | if (!buf) { | |
1638 | ret = -ENOMEM; | |
1639 | goto error; | |
1640 | } | |
1641 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1642 | ||
1643 | if (!is_in) { | |
1644 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1645 | ret = -EFAULT; | |
1646 | goto error; | |
1647 | } | |
01463900 | 1648 | uurb->buffer += u; |
3d97ff63 HG |
1649 | } |
1650 | totlen -= u; | |
1651 | } | |
1652 | } else if (uurb->buffer_length > 0) { | |
f7d34b44 SG |
1653 | if (as->usbm) { |
1654 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
3d97ff63 | 1655 | |
f7d34b44 SG |
1656 | as->urb->transfer_buffer = as->usbm->mem + |
1657 | (uurb_start - as->usbm->vm_start); | |
1658 | } else { | |
1659 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1660 | GFP_KERNEL); | |
1661 | if (!as->urb->transfer_buffer) { | |
1662 | ret = -ENOMEM; | |
3d97ff63 HG |
1663 | goto error; |
1664 | } | |
f7d34b44 SG |
1665 | if (!is_in) { |
1666 | if (copy_from_user(as->urb->transfer_buffer, | |
1667 | uurb->buffer, | |
1668 | uurb->buffer_length)) { | |
1669 | ret = -EFAULT; | |
1670 | goto error; | |
1671 | } | |
1672 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1673 | /* | |
1674 | * Isochronous input data may end up being | |
1675 | * discontiguous if some of the packets are | |
1676 | * short. Clear the buffer so that the gaps | |
1677 | * don't leak kernel data to userspace. | |
1678 | */ | |
1679 | memset(as->urb->transfer_buffer, 0, | |
1680 | uurb->buffer_length); | |
1681 | } | |
3d97ff63 | 1682 | } |
9180135b | 1683 | } |
04e482ff GKH |
1684 | as->urb->dev = ps->dev; |
1685 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1686 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1687 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1688 | |
1689 | /* This tedious sequence is necessary because the URB_* flags | |
1690 | * are internal to the kernel and subject to change, whereas | |
1691 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1692 | */ | |
1693 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1694 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1695 | u |= URB_ISO_ASAP; | |
d310d05f | 1696 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) |
14722ef4 AS |
1697 | u |= URB_SHORT_NOT_OK; |
1698 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1699 | u |= URB_NO_FSBR; | |
1700 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1701 | u |= URB_ZERO_PACKET; | |
1702 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1703 | u |= URB_NO_INTERRUPT; | |
1704 | as->urb->transfer_flags = u; | |
1705 | ||
1da177e4 | 1706 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1707 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1708 | dr = NULL; |
1da177e4 | 1709 | as->urb->start_frame = uurb->start_frame; |
b2d03eb5 | 1710 | as->urb->number_of_packets = number_of_packets; |
948cd8c1 | 1711 | as->urb->stream_id = stream_id; |
53e5f36f AS |
1712 | |
1713 | if (ep->desc.bInterval) { | |
1714 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || | |
1715 | ps->dev->speed == USB_SPEED_HIGH || | |
1716 | ps->dev->speed >= USB_SPEED_SUPER) | |
1717 | as->urb->interval = 1 << | |
1718 | min(15, ep->desc.bInterval - 1); | |
1719 | else | |
1720 | as->urb->interval = ep->desc.bInterval; | |
1721 | } | |
1722 | ||
04e482ff GKH |
1723 | as->urb->context = as; |
1724 | as->urb->complete = async_completed; | |
b2d03eb5 | 1725 | for (totlen = u = 0; u < number_of_packets; u++) { |
1da177e4 LT |
1726 | as->urb->iso_frame_desc[u].offset = totlen; |
1727 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1728 | totlen += isopkt[u].length; | |
1729 | } | |
6fd19f4b | 1730 | kfree(isopkt); |
52fb743d | 1731 | isopkt = NULL; |
1da177e4 | 1732 | as->ps = ps; |
04e482ff | 1733 | as->userurb = arg; |
f7d34b44 SG |
1734 | if (as->usbm) { |
1735 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1736 | ||
1737 | as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1738 | as->urb->transfer_dma = as->usbm->dma_handle + | |
1739 | (uurb_start - as->usbm->vm_start); | |
1740 | } else if (is_in && uurb->buffer_length > 0) | |
1da177e4 | 1741 | as->userbuffer = uurb->buffer; |
1da177e4 LT |
1742 | as->signr = uurb->signr; |
1743 | as->ifnum = ifnum; | |
2425c08b | 1744 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1745 | as->cred = get_current_cred(); |
7a01955f | 1746 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1747 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1748 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1749 | NULL, 0); |
1750 | if (!is_in) | |
1751 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1752 | ||
04e482ff | 1753 | async_newpending(as); |
01c6460f AS |
1754 | |
1755 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1756 | spin_lock_irq(&ps->lock); | |
1757 | ||
1758 | /* Not exactly the endpoint address; the direction bit is | |
1759 | * shifted to the 0x10 position so that the value will be | |
1760 | * between 0 and 31. | |
1761 | */ | |
1762 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1763 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1764 | >> 3); | |
1765 | ||
1766 | /* If this bulk URB is the start of a new transfer, re-enable | |
1767 | * the endpoint. Otherwise mark it as a continuation URB. | |
1768 | */ | |
1769 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1770 | as->bulk_status = AS_CONTINUATION; | |
1771 | else | |
1772 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1773 | ||
1774 | /* Don't accept continuation URBs if the endpoint is | |
1775 | * disabled because of an earlier error. | |
1776 | */ | |
1777 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1778 | ret = -EREMOTEIO; | |
1779 | else | |
1780 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1781 | spin_unlock_irq(&ps->lock); | |
1782 | } else { | |
1783 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1784 | } | |
1785 | ||
1786 | if (ret) { | |
04e482ff GKH |
1787 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1788 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1789 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1790 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1791 | async_removepending(as); |
52fb743d | 1792 | goto error; |
04e482ff GKH |
1793 | } |
1794 | return 0; | |
52fb743d AS |
1795 | |
1796 | error: | |
f7d34b44 SG |
1797 | if (as && as->usbm) |
1798 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
52fb743d AS |
1799 | kfree(isopkt); |
1800 | kfree(dr); | |
1801 | if (as) | |
1802 | free_async(as); | |
1803 | return ret; | |
1da177e4 LT |
1804 | } |
1805 | ||
9b6f0c4b | 1806 | static int proc_submiturb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1807 | { |
1808 | struct usbdevfs_urb uurb; | |
1809 | ||
1810 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1811 | return -EFAULT; | |
1812 | ||
04e482ff GKH |
1813 | return proc_do_submiturb(ps, &uurb, |
1814 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1815 | arg); | |
1da177e4 LT |
1816 | } |
1817 | ||
9b6f0c4b | 1818 | static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1819 | { |
4e09dcf2 | 1820 | struct urb *urb; |
1da177e4 | 1821 | struct async *as; |
4e09dcf2 | 1822 | unsigned long flags; |
1da177e4 | 1823 | |
4e09dcf2 | 1824 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1825 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1826 | if (!as) { |
1827 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1828 | return -EINVAL; |
4e09dcf2 HL |
1829 | } |
1830 | ||
1831 | urb = as->urb; | |
1832 | usb_get_urb(urb); | |
1833 | spin_unlock_irqrestore(&ps->lock, flags); | |
1834 | ||
1835 | usb_kill_urb(urb); | |
1836 | usb_put_urb(urb); | |
1837 | ||
1da177e4 LT |
1838 | return 0; |
1839 | } | |
1840 | ||
1841 | static int processcompl(struct async *as, void __user * __user *arg) | |
1842 | { | |
1843 | struct urb *urb = as->urb; | |
1844 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1845 | void __user *addr = as->userurb; | |
1846 | unsigned int i; | |
1847 | ||
7152b592 | 1848 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1849 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1850 | goto err_out; |
7152b592 | 1851 | } |
e015268d | 1852 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1853 | goto err_out; |
1da177e4 | 1854 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1855 | goto err_out; |
1da177e4 | 1856 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1857 | goto err_out; |
1da177e4 | 1858 | |
93cf9b90 | 1859 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1860 | for (i = 0; i < urb->number_of_packets; i++) { |
1861 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1862 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1863 | goto err_out; |
668a9541 CL |
1864 | if (put_user(urb->iso_frame_desc[i].status, |
1865 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1866 | goto err_out; |
668a9541 | 1867 | } |
1da177e4 LT |
1868 | } |
1869 | ||
1da177e4 LT |
1870 | if (put_user(addr, (void __user * __user *)arg)) |
1871 | return -EFAULT; | |
1872 | return 0; | |
d794a021 ON |
1873 | |
1874 | err_out: | |
d794a021 | 1875 | return -EFAULT; |
1da177e4 LT |
1876 | } |
1877 | ||
9b6f0c4b | 1878 | static struct async *reap_as(struct usb_dev_state *ps) |
1da177e4 | 1879 | { |
04e482ff | 1880 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1881 | struct async *as = NULL; |
1882 | struct usb_device *dev = ps->dev; | |
1883 | ||
1884 | add_wait_queue(&ps->wait, &wait); | |
1885 | for (;;) { | |
1886 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff | 1887 | as = async_getcompleted(ps); |
3f2cee73 | 1888 | if (as || !connected(ps)) |
1da177e4 LT |
1889 | break; |
1890 | if (signal_pending(current)) | |
1891 | break; | |
1892 | usb_unlock_device(dev); | |
1893 | schedule(); | |
1894 | usb_lock_device(dev); | |
1895 | } | |
1896 | remove_wait_queue(&ps->wait, &wait); | |
1897 | set_current_state(TASK_RUNNING); | |
1898 | return as; | |
1899 | } | |
1900 | ||
9b6f0c4b | 1901 | static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1902 | { |
1903 | struct async *as = reap_as(ps); | |
a016a816 | 1904 | |
ddeee0b2 | 1905 | if (as) { |
a016a816 AS |
1906 | int retval; |
1907 | ||
1908 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
1909 | retval = processcompl(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
1910 | free_async(as); |
1911 | return retval; | |
1912 | } | |
1da177e4 LT |
1913 | if (signal_pending(current)) |
1914 | return -EINTR; | |
3f2cee73 | 1915 | return -ENODEV; |
1da177e4 LT |
1916 | } |
1917 | ||
9b6f0c4b | 1918 | static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1919 | { |
ddeee0b2 | 1920 | int retval; |
1da177e4 LT |
1921 | struct async *as; |
1922 | ||
ddeee0b2 | 1923 | as = async_getcompleted(ps); |
ddeee0b2 | 1924 | if (as) { |
a016a816 | 1925 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
1926 | retval = processcompl(as, (void __user * __user *)arg); |
1927 | free_async(as); | |
3f2cee73 AS |
1928 | } else { |
1929 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
1930 | } |
1931 | return retval; | |
1da177e4 LT |
1932 | } |
1933 | ||
1934 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 1935 | static int proc_control_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1936 | struct usbdevfs_ctrltransfer32 __user *p32) |
1937 | { | |
5b32c385 MB |
1938 | struct usbdevfs_ctrltransfer __user *p; |
1939 | __u32 udata; | |
1940 | p = compat_alloc_user_space(sizeof(*p)); | |
1941 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1942 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1943 | put_user(compat_ptr(udata), &p->data)) |
1944 | return -EFAULT; | |
5b32c385 | 1945 | return proc_control(ps, p); |
637e8a60 AB |
1946 | } |
1947 | ||
9b6f0c4b | 1948 | static int proc_bulk_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1949 | struct usbdevfs_bulktransfer32 __user *p32) |
1950 | { | |
06793f2d MB |
1951 | struct usbdevfs_bulktransfer __user *p; |
1952 | compat_uint_t n; | |
1953 | compat_caddr_t addr; | |
637e8a60 | 1954 | |
06793f2d | 1955 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1956 | |
06793f2d MB |
1957 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1958 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1959 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1960 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1961 | return -EFAULT; | |
637e8a60 | 1962 | |
06793f2d | 1963 | return proc_bulk(ps, p); |
637e8a60 | 1964 | } |
9b6f0c4b | 1965 | static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg) |
637e8a60 AB |
1966 | { |
1967 | struct usbdevfs_disconnectsignal32 ds; | |
1968 | ||
1969 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1970 | return -EFAULT; | |
1971 | ps->discsignr = ds.signr; | |
1972 | ps->disccontext = compat_ptr(ds.context); | |
1973 | return 0; | |
1974 | } | |
1da177e4 LT |
1975 | |
1976 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1977 | struct usbdevfs_urb32 __user *uurb) | |
1978 | { | |
1979 | __u32 uptr; | |
18753ebc MB |
1980 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1981 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1982 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1983 | __get_user(kurb->status, &uurb->status) || | |
1984 | __get_user(kurb->flags, &uurb->flags) || | |
1985 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1986 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1987 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1988 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1989 | __get_user(kurb->error_count, &uurb->error_count) || | |
1990 | __get_user(kurb->signr, &uurb->signr)) | |
1991 | return -EFAULT; | |
1992 | ||
1993 | if (__get_user(uptr, &uurb->buffer)) | |
1994 | return -EFAULT; | |
1995 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1996 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1997 | return -EFAULT; |
1998 | kurb->usercontext = compat_ptr(uptr); | |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
9b6f0c4b | 2003 | static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2004 | { |
2005 | struct usbdevfs_urb uurb; | |
2006 | ||
04e482ff | 2007 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
2008 | return -EFAULT; |
2009 | ||
04e482ff GKH |
2010 | return proc_do_submiturb(ps, &uurb, |
2011 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
2012 | arg); | |
1da177e4 LT |
2013 | } |
2014 | ||
2015 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
2016 | { | |
2017 | struct urb *urb = as->urb; | |
2018 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
2019 | void __user *addr = as->userurb; | |
2020 | unsigned int i; | |
2021 | ||
2102e06a | 2022 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 2023 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 2024 | return -EFAULT; |
2102e06a | 2025 | } |
e015268d | 2026 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
2027 | return -EFAULT; |
2028 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
2029 | return -EFAULT; | |
2030 | if (put_user(urb->error_count, &userurb->error_count)) | |
2031 | return -EFAULT; | |
2032 | ||
93cf9b90 | 2033 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
2034 | for (i = 0; i < urb->number_of_packets; i++) { |
2035 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
2036 | &userurb->iso_frame_desc[i].actual_length)) | |
2037 | return -EFAULT; | |
2038 | if (put_user(urb->iso_frame_desc[i].status, | |
2039 | &userurb->iso_frame_desc[i].status)) | |
2040 | return -EFAULT; | |
2041 | } | |
1da177e4 LT |
2042 | } |
2043 | ||
c714de5d | 2044 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
2045 | return -EFAULT; |
2046 | return 0; | |
2047 | } | |
2048 | ||
9b6f0c4b | 2049 | static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2050 | { |
2051 | struct async *as = reap_as(ps); | |
a016a816 | 2052 | |
ddeee0b2 | 2053 | if (as) { |
a016a816 AS |
2054 | int retval; |
2055 | ||
2056 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
2057 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
2058 | free_async(as); |
2059 | return retval; | |
2060 | } | |
1da177e4 LT |
2061 | if (signal_pending(current)) |
2062 | return -EINTR; | |
3f2cee73 | 2063 | return -ENODEV; |
1da177e4 LT |
2064 | } |
2065 | ||
9b6f0c4b | 2066 | static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 2067 | { |
ddeee0b2 | 2068 | int retval; |
1da177e4 LT |
2069 | struct async *as; |
2070 | ||
ddeee0b2 LT |
2071 | as = async_getcompleted(ps); |
2072 | if (as) { | |
a016a816 | 2073 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
2074 | retval = processcompl_compat(as, (void __user * __user *)arg); |
2075 | free_async(as); | |
3f2cee73 AS |
2076 | } else { |
2077 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
2078 | } |
2079 | return retval; | |
1da177e4 LT |
2080 | } |
2081 | ||
637e8a60 | 2082 | |
1da177e4 LT |
2083 | #endif |
2084 | ||
9b6f0c4b | 2085 | static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2086 | { |
2087 | struct usbdevfs_disconnectsignal ds; | |
2088 | ||
2089 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
2090 | return -EFAULT; | |
1da177e4 LT |
2091 | ps->discsignr = ds.signr; |
2092 | ps->disccontext = ds.context; | |
2093 | return 0; | |
2094 | } | |
2095 | ||
9b6f0c4b | 2096 | static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2097 | { |
2098 | unsigned int ifnum; | |
2099 | ||
2100 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2101 | return -EFAULT; | |
2102 | return claimintf(ps, ifnum); | |
2103 | } | |
2104 | ||
9b6f0c4b | 2105 | static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2106 | { |
2107 | unsigned int ifnum; | |
2108 | int ret; | |
2109 | ||
2110 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2111 | return -EFAULT; | |
135551ea KB |
2112 | ret = releaseintf(ps, ifnum); |
2113 | if (ret < 0) | |
1da177e4 | 2114 | return ret; |
64f10edf | 2115 | destroy_async_on_interface(ps, ifnum); |
1da177e4 LT |
2116 | return 0; |
2117 | } | |
2118 | ||
9b6f0c4b | 2119 | static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 2120 | { |
1da177e4 LT |
2121 | int size; |
2122 | void *buf = NULL; | |
2123 | int retval = 0; | |
2124 | struct usb_interface *intf = NULL; | |
2125 | struct usb_driver *driver = NULL; | |
1da177e4 | 2126 | |
d883f52e RG |
2127 | if (ps->privileges_dropped) |
2128 | return -EACCES; | |
2129 | ||
c36fc889 | 2130 | /* alloc buffer */ |
135551ea KB |
2131 | size = _IOC_SIZE(ctl->ioctl_code); |
2132 | if (size > 0) { | |
4baf0df7 Tİ |
2133 | buf = kmalloc(size, GFP_KERNEL); |
2134 | if (buf == NULL) | |
1da177e4 | 2135 | return -ENOMEM; |
c36fc889 | 2136 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 2137 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 2138 | kfree(buf); |
1da177e4 LT |
2139 | return -EFAULT; |
2140 | } | |
2141 | } else { | |
04e482ff | 2142 | memset(buf, 0, size); |
1da177e4 LT |
2143 | } |
2144 | } | |
2145 | ||
349710c3 | 2146 | if (!connected(ps)) { |
6fd19f4b | 2147 | kfree(buf); |
1da177e4 LT |
2148 | return -ENODEV; |
2149 | } | |
2150 | ||
2151 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
2152 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
2153 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
2154 | retval = -EINVAL; | |
c36fc889 | 2155 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
2156 | |
2157 | /* disconnect kernel driver from interface */ | |
2158 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
2159 | if (intf->dev.driver) { |
2160 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 2161 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
2162 | usb_driver_release_interface(driver, intf); |
2163 | } else | |
2164 | retval = -ENODATA; | |
1da177e4 LT |
2165 | break; |
2166 | ||
2167 | /* let kernel drivers try to (re)bind to the interface */ | |
2168 | case USBDEVFS_CONNECT: | |
885e9747 AS |
2169 | if (!intf->dev.driver) |
2170 | retval = device_attach(&intf->dev); | |
2171 | else | |
2172 | retval = -EBUSY; | |
1da177e4 LT |
2173 | break; |
2174 | ||
2175 | /* talk directly to the interface's driver */ | |
2176 | default: | |
1da177e4 LT |
2177 | if (intf->dev.driver) |
2178 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 2179 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
2180 | retval = -ENOTTY; |
2181 | } else { | |
c532b29a | 2182 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
2183 | if (retval == -ENOIOCTLCMD) |
2184 | retval = -ENOTTY; | |
2185 | } | |
1da177e4 LT |
2186 | } |
2187 | ||
2188 | /* cleanup and return */ | |
2189 | if (retval >= 0 | |
04e482ff | 2190 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 2191 | && size > 0 |
04e482ff | 2192 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 2193 | retval = -EFAULT; |
6fd19f4b JJ |
2194 | |
2195 | kfree(buf); | |
1da177e4 LT |
2196 | return retval; |
2197 | } | |
2198 | ||
9b6f0c4b | 2199 | static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) |
c36fc889 PZ |
2200 | { |
2201 | struct usbdevfs_ioctl ctrl; | |
2202 | ||
04e482ff | 2203 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
2204 | return -EFAULT; |
2205 | return proc_ioctl(ps, &ctrl); | |
2206 | } | |
2207 | ||
2208 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 2209 | static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
2210 | { |
2211 | struct usbdevfs_ioctl32 __user *uioc; | |
2212 | struct usbdevfs_ioctl ctrl; | |
2213 | u32 udata; | |
2214 | ||
058120d7 | 2215 | uioc = compat_ptr((long)arg); |
18753ebc MB |
2216 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
2217 | __get_user(ctrl.ifno, &uioc->ifno) || | |
2218 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
2219 | __get_user(udata, &uioc->data)) |
2220 | return -EFAULT; | |
2221 | ctrl.data = compat_ptr(udata); | |
2222 | ||
2223 | return proc_ioctl(ps, &ctrl); | |
2224 | } | |
2225 | #endif | |
2226 | ||
9b6f0c4b | 2227 | static int proc_claim_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2228 | { |
2229 | unsigned portnum; | |
2230 | int rc; | |
2231 | ||
2232 | if (get_user(portnum, (unsigned __user *) arg)) | |
2233 | return -EFAULT; | |
2234 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
2235 | if (rc == 0) | |
2236 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
2237 | portnum, task_pid_nr(current), current->comm); | |
2238 | return rc; | |
2239 | } | |
2240 | ||
9b6f0c4b | 2241 | static int proc_release_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2242 | { |
2243 | unsigned portnum; | |
2244 | ||
2245 | if (get_user(portnum, (unsigned __user *) arg)) | |
2246 | return -EFAULT; | |
2247 | return usb_hub_release_port(ps->dev, portnum, ps); | |
2248 | } | |
2249 | ||
9b6f0c4b | 2250 | static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg) |
19181bc5 HG |
2251 | { |
2252 | __u32 caps; | |
2253 | ||
3f2cee73 | 2254 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM | |
d883f52e RG |
2255 | USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP | |
2256 | USBDEVFS_CAP_DROP_PRIVILEGES; | |
19181bc5 HG |
2257 | if (!ps->dev->bus->no_stop_on_short) |
2258 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
2259 | if (ps->dev->bus->sg_tablesize) |
2260 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
2261 | |
2262 | if (put_user(caps, (__u32 __user *)arg)) | |
2263 | return -EFAULT; | |
2264 | ||
2265 | return 0; | |
2266 | } | |
2267 | ||
9b6f0c4b | 2268 | static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg) |
0837e7e5 HG |
2269 | { |
2270 | struct usbdevfs_disconnect_claim dc; | |
2271 | struct usb_interface *intf; | |
2272 | ||
2273 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
2274 | return -EFAULT; | |
2275 | ||
2276 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
2277 | if (!intf) | |
2278 | return -EINVAL; | |
2279 | ||
2280 | if (intf->dev.driver) { | |
2281 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
2282 | ||
d883f52e RG |
2283 | if (ps->privileges_dropped) |
2284 | return -EACCES; | |
2285 | ||
0837e7e5 HG |
2286 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && |
2287 | strncmp(dc.driver, intf->dev.driver->name, | |
2288 | sizeof(dc.driver)) != 0) | |
2289 | return -EBUSY; | |
2290 | ||
2291 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
2292 | strncmp(dc.driver, intf->dev.driver->name, | |
2293 | sizeof(dc.driver)) == 0) | |
2294 | return -EBUSY; | |
2295 | ||
2296 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
2297 | usb_driver_release_interface(driver, intf); | |
2298 | } | |
2299 | ||
2300 | return claimintf(ps, dc.interface); | |
2301 | } | |
2302 | ||
3e75c6de | 2303 | static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2304 | { |
2305 | unsigned num_streams, num_eps; | |
2306 | struct usb_host_endpoint **eps; | |
2307 | struct usb_interface *intf; | |
2308 | int r; | |
2309 | ||
2310 | r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps, | |
2311 | &eps, &intf); | |
2312 | if (r) | |
2313 | return r; | |
2314 | ||
2315 | destroy_async_on_interface(ps, | |
2316 | intf->altsetting[0].desc.bInterfaceNumber); | |
2317 | ||
2318 | r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL); | |
2319 | kfree(eps); | |
2320 | return r; | |
2321 | } | |
2322 | ||
3e75c6de | 2323 | static int proc_free_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2324 | { |
2325 | unsigned num_eps; | |
2326 | struct usb_host_endpoint **eps; | |
2327 | struct usb_interface *intf; | |
2328 | int r; | |
2329 | ||
2330 | r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf); | |
2331 | if (r) | |
2332 | return r; | |
2333 | ||
2334 | destroy_async_on_interface(ps, | |
2335 | intf->altsetting[0].desc.bInterfaceNumber); | |
2336 | ||
2337 | r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL); | |
2338 | kfree(eps); | |
2339 | return r; | |
2340 | } | |
2341 | ||
d883f52e RG |
2342 | static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg) |
2343 | { | |
2344 | u32 data; | |
2345 | ||
2346 | if (copy_from_user(&data, arg, sizeof(data))) | |
2347 | return -EFAULT; | |
2348 | ||
2349 | /* This is an one way operation. Once privileges are | |
2350 | * dropped, you cannot regain them. You may however reissue | |
2351 | * this ioctl to shrink the allowed interfaces mask. | |
2352 | */ | |
2353 | ps->interface_allowed_mask &= data; | |
2354 | ps->privileges_dropped = true; | |
2355 | ||
2356 | return 0; | |
2357 | } | |
2358 | ||
1da177e4 LT |
2359 | /* |
2360 | * NOTE: All requests here that have interface numbers as parameters | |
2361 | * are assuming that somehow the configuration has been prevented from | |
2362 | * changing. But there's no mechanism to ensure that... | |
2363 | */ | |
637e8a60 AB |
2364 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
2365 | void __user *p) | |
1da177e4 | 2366 | { |
9b6f0c4b | 2367 | struct usb_dev_state *ps = file->private_data; |
496ad9aa | 2368 | struct inode *inode = file_inode(file); |
1da177e4 | 2369 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
2370 | int ret = -ENOTTY; |
2371 | ||
2372 | if (!(file->f_mode & FMODE_WRITE)) | |
2373 | return -EPERM; | |
01412a21 | 2374 | |
1da177e4 | 2375 | usb_lock_device(dev); |
3f2cee73 AS |
2376 | |
2377 | /* Reap operations are allowed even after disconnection */ | |
2378 | switch (cmd) { | |
2379 | case USBDEVFS_REAPURB: | |
2380 | snoop(&dev->dev, "%s: REAPURB\n", __func__); | |
2381 | ret = proc_reapurb(ps, p); | |
2382 | goto done; | |
2383 | ||
2384 | case USBDEVFS_REAPURBNDELAY: | |
2385 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); | |
2386 | ret = proc_reapurbnonblock(ps, p); | |
2387 | goto done; | |
2388 | ||
2389 | #ifdef CONFIG_COMPAT | |
2390 | case USBDEVFS_REAPURB32: | |
2391 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); | |
2392 | ret = proc_reapurb_compat(ps, p); | |
2393 | goto done; | |
2394 | ||
2395 | case USBDEVFS_REAPURBNDELAY32: | |
2396 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); | |
2397 | ret = proc_reapurbnonblock_compat(ps, p); | |
2398 | goto done; | |
2399 | #endif | |
2400 | } | |
2401 | ||
349710c3 | 2402 | if (!connected(ps)) { |
1da177e4 LT |
2403 | usb_unlock_device(dev); |
2404 | return -ENODEV; | |
2405 | } | |
2406 | ||
2407 | switch (cmd) { | |
2408 | case USBDEVFS_CONTROL: | |
441b62c1 | 2409 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
2410 | ret = proc_control(ps, p); |
2411 | if (ret >= 0) | |
078cd827 | 2412 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2413 | break; |
2414 | ||
2415 | case USBDEVFS_BULK: | |
441b62c1 | 2416 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
2417 | ret = proc_bulk(ps, p); |
2418 | if (ret >= 0) | |
078cd827 | 2419 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2420 | break; |
2421 | ||
2422 | case USBDEVFS_RESETEP: | |
441b62c1 | 2423 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2424 | ret = proc_resetep(ps, p); |
2425 | if (ret >= 0) | |
078cd827 | 2426 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2427 | break; |
2428 | ||
2429 | case USBDEVFS_RESET: | |
441b62c1 | 2430 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2431 | ret = proc_resetdevice(ps); |
2432 | break; | |
2433 | ||
2434 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2435 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2436 | ret = proc_clearhalt(ps, p); |
2437 | if (ret >= 0) | |
078cd827 | 2438 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2439 | break; |
2440 | ||
2441 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2442 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2443 | ret = proc_getdriver(ps, p); |
2444 | break; | |
2445 | ||
2446 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2447 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2448 | ret = proc_connectinfo(ps, p); |
2449 | break; | |
2450 | ||
2451 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2452 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2453 | ret = proc_setintf(ps, p); |
2454 | break; | |
2455 | ||
2456 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2457 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2458 | ret = proc_setconfig(ps, p); |
2459 | break; | |
2460 | ||
2461 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2462 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2463 | ret = proc_submiturb(ps, p); |
2464 | if (ret >= 0) | |
078cd827 | 2465 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2466 | break; |
2467 | ||
2468 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2469 | case USBDEVFS_CONTROL32: |
2470 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2471 | ret = proc_control_compat(ps, p); | |
2472 | if (ret >= 0) | |
078cd827 | 2473 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2474 | break; |
2475 | ||
2476 | case USBDEVFS_BULK32: | |
2477 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2478 | ret = proc_bulk_compat(ps, p); | |
2479 | if (ret >= 0) | |
078cd827 | 2480 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2481 | break; |
2482 | ||
2483 | case USBDEVFS_DISCSIGNAL32: | |
2484 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2485 | ret = proc_disconnectsignal_compat(ps, p); | |
2486 | break; | |
1da177e4 LT |
2487 | |
2488 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2489 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2490 | ret = proc_submiturb_compat(ps, p); |
2491 | if (ret >= 0) | |
078cd827 | 2492 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2493 | break; |
2494 | ||
c36fc889 | 2495 | case USBDEVFS_IOCTL32: |
637e8a60 | 2496 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2497 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2498 | break; |
1da177e4 LT |
2499 | #endif |
2500 | ||
2501 | case USBDEVFS_DISCARDURB: | |
a016a816 | 2502 | snoop(&dev->dev, "%s: DISCARDURB %p\n", __func__, p); |
1da177e4 LT |
2503 | ret = proc_unlinkurb(ps, p); |
2504 | break; | |
2505 | ||
1da177e4 | 2506 | case USBDEVFS_DISCSIGNAL: |
441b62c1 | 2507 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2508 | ret = proc_disconnectsignal(ps, p); |
2509 | break; | |
2510 | ||
2511 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2512 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2513 | ret = proc_claiminterface(ps, p); |
2514 | break; | |
2515 | ||
2516 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2517 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2518 | ret = proc_releaseinterface(ps, p); |
2519 | break; | |
2520 | ||
2521 | case USBDEVFS_IOCTL: | |
441b62c1 | 2522 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2523 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2524 | break; |
7cbe5dca AS |
2525 | |
2526 | case USBDEVFS_CLAIM_PORT: | |
2527 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2528 | ret = proc_claim_port(ps, p); | |
2529 | break; | |
2530 | ||
2531 | case USBDEVFS_RELEASE_PORT: | |
2532 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2533 | ret = proc_release_port(ps, p); | |
2534 | break; | |
19181bc5 HG |
2535 | case USBDEVFS_GET_CAPABILITIES: |
2536 | ret = proc_get_capabilities(ps, p); | |
2537 | break; | |
0837e7e5 HG |
2538 | case USBDEVFS_DISCONNECT_CLAIM: |
2539 | ret = proc_disconnect_claim(ps, p); | |
2540 | break; | |
bcf7f6e3 HG |
2541 | case USBDEVFS_ALLOC_STREAMS: |
2542 | ret = proc_alloc_streams(ps, p); | |
2543 | break; | |
2544 | case USBDEVFS_FREE_STREAMS: | |
2545 | ret = proc_free_streams(ps, p); | |
2546 | break; | |
d883f52e RG |
2547 | case USBDEVFS_DROP_PRIVILEGES: |
2548 | ret = proc_drop_privileges(ps, p); | |
2549 | break; | |
1da177e4 | 2550 | } |
3f2cee73 AS |
2551 | |
2552 | done: | |
1da177e4 LT |
2553 | usb_unlock_device(dev); |
2554 | if (ret >= 0) | |
078cd827 | 2555 | inode->i_atime = current_time(inode); |
1da177e4 LT |
2556 | return ret; |
2557 | } | |
2558 | ||
637e8a60 AB |
2559 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2560 | unsigned long arg) | |
2561 | { | |
2562 | int ret; | |
2563 | ||
637e8a60 | 2564 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2565 | |
2566 | return ret; | |
2567 | } | |
2568 | ||
2569 | #ifdef CONFIG_COMPAT | |
2570 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2571 | unsigned long arg) | |
2572 | { | |
2573 | int ret; | |
2574 | ||
637e8a60 | 2575 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2576 | |
2577 | return ret; | |
2578 | } | |
2579 | #endif | |
2580 | ||
1da177e4 | 2581 | /* No kernel lock - fine */ |
04e482ff GKH |
2582 | static unsigned int usbdev_poll(struct file *file, |
2583 | struct poll_table_struct *wait) | |
1da177e4 | 2584 | { |
9b6f0c4b | 2585 | struct usb_dev_state *ps = file->private_data; |
ec17cf1c | 2586 | unsigned int mask = 0; |
1da177e4 LT |
2587 | |
2588 | poll_wait(file, &ps->wait, wait); | |
2589 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2590 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2591 | if (!connected(ps)) |
5cce4382 AS |
2592 | mask |= POLLHUP; |
2593 | if (list_empty(&ps->list)) | |
2594 | mask |= POLLERR; | |
1da177e4 LT |
2595 | return mask; |
2596 | } | |
2597 | ||
9f8b17e6 | 2598 | const struct file_operations usbdev_file_operations = { |
637e8a60 | 2599 | .owner = THIS_MODULE, |
b25472f9 | 2600 | .llseek = no_seek_end_llseek, |
637e8a60 AB |
2601 | .read = usbdev_read, |
2602 | .poll = usbdev_poll, | |
2603 | .unlocked_ioctl = usbdev_ioctl, | |
2604 | #ifdef CONFIG_COMPAT | |
2605 | .compat_ioctl = usbdev_compat_ioctl, | |
2606 | #endif | |
f7d34b44 | 2607 | .mmap = usbdev_mmap, |
637e8a60 AB |
2608 | .open = usbdev_open, |
2609 | .release = usbdev_release, | |
1da177e4 | 2610 | }; |
fbf82fd2 | 2611 | |
501950d8 | 2612 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 | 2613 | { |
9b6f0c4b | 2614 | struct usb_dev_state *ps; |
cd9f0375 AS |
2615 | struct siginfo sinfo; |
2616 | ||
2617 | while (!list_empty(&udev->filelist)) { | |
9b6f0c4b | 2618 | ps = list_entry(udev->filelist.next, struct usb_dev_state, list); |
cd9f0375 AS |
2619 | destroy_all_async(ps); |
2620 | wake_up_all(&ps->wait); | |
2621 | list_del_init(&ps->list); | |
2622 | if (ps->discsignr) { | |
f0c2b681 | 2623 | memset(&sinfo, 0, sizeof(sinfo)); |
cd9f0375 AS |
2624 | sinfo.si_signo = ps->discsignr; |
2625 | sinfo.si_errno = EPIPE; | |
2626 | sinfo.si_code = SI_ASYNCIO; | |
2627 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2628 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2629 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2630 | } |
2631 | } | |
2632 | } | |
2633 | ||
501950d8 | 2634 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2635 | unsigned long action, void *dev) |
a7b986b3 GKH |
2636 | { |
2637 | switch (action) { | |
2638 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2639 | break; |
2640 | case USB_DEVICE_REMOVE: | |
501950d8 | 2641 | usbdev_remove(dev); |
a7b986b3 GKH |
2642 | break; |
2643 | } | |
2644 | return NOTIFY_OK; | |
2645 | } | |
2646 | ||
2647 | static struct notifier_block usbdev_nb = { | |
00fe52de | 2648 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2649 | }; |
2650 | ||
7e7654a9 | 2651 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2652 | |
9f8b17e6 | 2653 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2654 | { |
2655 | int retval; | |
2656 | ||
fad21bdf | 2657 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2658 | "usb_device"); |
fbf82fd2 | 2659 | if (retval) { |
69a85942 | 2660 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2661 | goto out; |
2662 | } | |
9f8b17e6 | 2663 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2664 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2665 | if (retval) { |
69a85942 GKH |
2666 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2667 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2668 | goto error_cdev; |
fbf82fd2 | 2669 | } |
501950d8 | 2670 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2671 | out: |
2672 | return retval; | |
a7b986b3 | 2673 | |
a7b986b3 GKH |
2674 | error_cdev: |
2675 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2676 | goto out; | |
fbf82fd2 KS |
2677 | } |
2678 | ||
9f8b17e6 | 2679 | void usb_devio_cleanup(void) |
fbf82fd2 | 2680 | { |
a7b986b3 | 2681 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2682 | cdev_del(&usb_device_cdev); |
fad21bdf | 2683 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2684 | } |