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Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /*****************************************************************************/ |
3 | ||
4 | /* | |
5 | * devio.c -- User space communication with USB devices. | |
6 | * | |
7 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
8 | * | |
1da177e4 LT |
9 | * This file implements the usbfs/x/y files, where |
10 | * x is the bus number and y the device number. | |
11 | * | |
12 | * It allows user space programs/"drivers" to communicate directly | |
13 | * with USB devices without intervening kernel driver. | |
14 | * | |
15 | * Revision history | |
16 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
17 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
18 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
19 | * (CAN-2005-3055) | |
1da177e4 LT |
20 | */ |
21 | ||
22 | /*****************************************************************************/ | |
23 | ||
24 | #include <linux/fs.h> | |
25 | #include <linux/mm.h> | |
3f07c014 | 26 | #include <linux/sched/signal.h> |
1da177e4 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/signal.h> |
29 | #include <linux/poll.h> | |
30 | #include <linux/module.h> | |
b11b2e1b | 31 | #include <linux/string.h> |
1da177e4 LT |
32 | #include <linux/usb.h> |
33 | #include <linux/usbdevice_fs.h> | |
27729aad | 34 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 35 | #include <linux/cdev.h> |
a7b986b3 | 36 | #include <linux/notifier.h> |
7a01955f | 37 | #include <linux/security.h> |
d178bc3a | 38 | #include <linux/user_namespace.h> |
3d97ff63 | 39 | #include <linux/scatterlist.h> |
e6889b31 | 40 | #include <linux/uaccess.h> |
f7d34b44 | 41 | #include <linux/dma-mapping.h> |
1da177e4 LT |
42 | #include <asm/byteorder.h> |
43 | #include <linux/moduleparam.h> | |
44 | ||
1da177e4 LT |
45 | #include "usb.h" |
46 | ||
fbf82fd2 | 47 | #define USB_MAXBUS 64 |
fa86ad0b | 48 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 49 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 50 | |
4a2a8a2c AS |
51 | /* Mutual exclusion for removal, open, and release */ |
52 | DEFINE_MUTEX(usbfs_mutex); | |
53 | ||
9b6f0c4b | 54 | struct usb_dev_state { |
cd9f0375 AS |
55 | struct list_head list; /* state list */ |
56 | struct usb_device *dev; | |
57 | struct file *file; | |
58 | spinlock_t lock; /* protects the async urb lists */ | |
59 | struct list_head async_pending; | |
60 | struct list_head async_completed; | |
f7d34b44 | 61 | struct list_head memory_list; |
cd9f0375 AS |
62 | wait_queue_head_t wait; /* wake up if a request completed */ |
63 | unsigned int discsignr; | |
64 | struct pid *disc_pid; | |
d178bc3a | 65 | const struct cred *cred; |
cd9f0375 AS |
66 | void __user *disccontext; |
67 | unsigned long ifclaimed; | |
01c6460f | 68 | u32 disabled_bulk_eps; |
d883f52e RG |
69 | bool privileges_dropped; |
70 | unsigned long interface_allowed_mask; | |
cd9f0375 AS |
71 | }; |
72 | ||
f7d34b44 SG |
73 | struct usb_memory { |
74 | struct list_head memlist; | |
75 | int vma_use_count; | |
76 | int urb_use_count; | |
77 | u32 size; | |
78 | void *mem; | |
79 | dma_addr_t dma_handle; | |
80 | unsigned long vm_start; | |
81 | struct usb_dev_state *ps; | |
82 | }; | |
83 | ||
1da177e4 LT |
84 | struct async { |
85 | struct list_head asynclist; | |
9b6f0c4b | 86 | struct usb_dev_state *ps; |
2425c08b | 87 | struct pid *pid; |
d178bc3a | 88 | const struct cred *cred; |
1da177e4 LT |
89 | unsigned int signr; |
90 | unsigned int ifnum; | |
91 | void __user *userbuffer; | |
92 | void __user *userurb; | |
93 | struct urb *urb; | |
f7d34b44 | 94 | struct usb_memory *usbm; |
add1aaea | 95 | unsigned int mem_usage; |
e015268d | 96 | int status; |
01c6460f AS |
97 | u8 bulk_addr; |
98 | u8 bulk_status; | |
1da177e4 LT |
99 | }; |
100 | ||
90ab5ee9 | 101 | static bool usbfs_snoop; |
04e482ff GKH |
102 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
103 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 | 104 | |
0290cc9f AS |
105 | static unsigned usbfs_snoop_max = 65536; |
106 | module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR); | |
107 | MODULE_PARM_DESC(usbfs_snoop_max, | |
108 | "maximum number of bytes to print while snooping"); | |
109 | ||
1da177e4 LT |
110 | #define snoop(dev, format, arg...) \ |
111 | do { \ | |
112 | if (usbfs_snoop) \ | |
f355e830 | 113 | dev_info(dev, format, ## arg); \ |
1da177e4 LT |
114 | } while (0) |
115 | ||
4c6e8971 AS |
116 | enum snoop_when { |
117 | SUBMIT, COMPLETE | |
118 | }; | |
fad21bdf | 119 | |
4c6e8971 | 120 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 121 | |
add1aaea | 122 | /* Limit on the total amount of memory we can allocate for transfers */ |
1129d270 | 123 | static u32 usbfs_memory_mb = 16; |
3f5eb8d5 AS |
124 | module_param(usbfs_memory_mb, uint, 0644); |
125 | MODULE_PARM_DESC(usbfs_memory_mb, | |
126 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
127 | ||
57999d11 DC |
128 | /* Hard limit, necessary to avoid arithmetic overflow */ |
129 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) | |
130 | ||
1129d270 | 131 | static atomic64_t usbfs_memory_usage; /* Total memory currently allocated */ |
add1aaea AS |
132 | |
133 | /* Check whether it's okay to allocate more memory for a transfer */ | |
1129d270 | 134 | static int usbfs_increase_memory_usage(u64 amount) |
add1aaea | 135 | { |
1129d270 | 136 | u64 lim; |
3f5eb8d5 | 137 | |
6aa7de05 | 138 | lim = READ_ONCE(usbfs_memory_mb); |
1129d270 | 139 | lim <<= 20; |
3f5eb8d5 | 140 | |
1129d270 MB |
141 | atomic64_add(amount, &usbfs_memory_usage); |
142 | ||
143 | if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) { | |
144 | atomic64_sub(amount, &usbfs_memory_usage); | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
148 | return 0; | |
add1aaea AS |
149 | } |
150 | ||
151 | /* Memory for a transfer is being deallocated */ | |
1129d270 | 152 | static void usbfs_decrease_memory_usage(u64 amount) |
add1aaea | 153 | { |
1129d270 | 154 | atomic64_sub(amount, &usbfs_memory_usage); |
add1aaea | 155 | } |
4c6e8971 | 156 | |
9b6f0c4b | 157 | static int connected(struct usb_dev_state *ps) |
1da177e4 | 158 | { |
349710c3 AS |
159 | return (!list_empty(&ps->list) && |
160 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
161 | } |
162 | ||
f7d34b44 SG |
163 | static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count) |
164 | { | |
165 | struct usb_dev_state *ps = usbm->ps; | |
166 | unsigned long flags; | |
167 | ||
168 | spin_lock_irqsave(&ps->lock, flags); | |
169 | --*count; | |
170 | if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) { | |
171 | list_del(&usbm->memlist); | |
172 | spin_unlock_irqrestore(&ps->lock, flags); | |
173 | ||
174 | usb_free_coherent(ps->dev, usbm->size, usbm->mem, | |
175 | usbm->dma_handle); | |
176 | usbfs_decrease_memory_usage( | |
177 | usbm->size + sizeof(struct usb_memory)); | |
178 | kfree(usbm); | |
179 | } else { | |
180 | spin_unlock_irqrestore(&ps->lock, flags); | |
181 | } | |
182 | } | |
183 | ||
184 | static void usbdev_vm_open(struct vm_area_struct *vma) | |
185 | { | |
186 | struct usb_memory *usbm = vma->vm_private_data; | |
187 | unsigned long flags; | |
188 | ||
189 | spin_lock_irqsave(&usbm->ps->lock, flags); | |
190 | ++usbm->vma_use_count; | |
191 | spin_unlock_irqrestore(&usbm->ps->lock, flags); | |
192 | } | |
193 | ||
194 | static void usbdev_vm_close(struct vm_area_struct *vma) | |
195 | { | |
196 | struct usb_memory *usbm = vma->vm_private_data; | |
197 | ||
198 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
199 | } | |
200 | ||
b64d47ae | 201 | static const struct vm_operations_struct usbdev_vm_ops = { |
f7d34b44 SG |
202 | .open = usbdev_vm_open, |
203 | .close = usbdev_vm_close | |
204 | }; | |
205 | ||
206 | static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) | |
207 | { | |
208 | struct usb_memory *usbm = NULL; | |
209 | struct usb_dev_state *ps = file->private_data; | |
210 | size_t size = vma->vm_end - vma->vm_start; | |
211 | void *mem; | |
212 | unsigned long flags; | |
213 | dma_addr_t dma_handle; | |
214 | int ret; | |
215 | ||
216 | ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); | |
217 | if (ret) | |
218 | goto error; | |
219 | ||
220 | usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL); | |
221 | if (!usbm) { | |
222 | ret = -ENOMEM; | |
223 | goto error_decrease_mem; | |
224 | } | |
225 | ||
70f7ca9a JS |
226 | mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN, |
227 | &dma_handle); | |
f7d34b44 SG |
228 | if (!mem) { |
229 | ret = -ENOMEM; | |
230 | goto error_free_usbm; | |
231 | } | |
232 | ||
233 | memset(mem, 0, size); | |
234 | ||
235 | usbm->mem = mem; | |
236 | usbm->dma_handle = dma_handle; | |
237 | usbm->size = size; | |
238 | usbm->ps = ps; | |
239 | usbm->vm_start = vma->vm_start; | |
240 | usbm->vma_use_count = 1; | |
241 | INIT_LIST_HEAD(&usbm->memlist); | |
242 | ||
243 | if (remap_pfn_range(vma, vma->vm_start, | |
244 | virt_to_phys(usbm->mem) >> PAGE_SHIFT, | |
245 | size, vma->vm_page_prot) < 0) { | |
246 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
247 | return -EAGAIN; | |
248 | } | |
249 | ||
250 | vma->vm_flags |= VM_IO; | |
251 | vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP); | |
252 | vma->vm_ops = &usbdev_vm_ops; | |
253 | vma->vm_private_data = usbm; | |
254 | ||
255 | spin_lock_irqsave(&ps->lock, flags); | |
256 | list_add_tail(&usbm->memlist, &ps->memory_list); | |
257 | spin_unlock_irqrestore(&ps->lock, flags); | |
258 | ||
259 | return 0; | |
260 | ||
261 | error_free_usbm: | |
262 | kfree(usbm); | |
263 | error_decrease_mem: | |
264 | usbfs_decrease_memory_usage(size + sizeof(struct usb_memory)); | |
265 | error: | |
266 | return ret; | |
267 | } | |
268 | ||
04e482ff GKH |
269 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
270 | loff_t *ppos) | |
1da177e4 | 271 | { |
9b6f0c4b | 272 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
273 | struct usb_device *dev = ps->dev; |
274 | ssize_t ret = 0; | |
275 | unsigned len; | |
276 | loff_t pos; | |
277 | int i; | |
278 | ||
279 | pos = *ppos; | |
280 | usb_lock_device(dev); | |
349710c3 | 281 | if (!connected(ps)) { |
1da177e4 LT |
282 | ret = -ENODEV; |
283 | goto err; | |
284 | } else if (pos < 0) { | |
285 | ret = -EINVAL; | |
286 | goto err; | |
287 | } | |
288 | ||
289 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
290 | /* 18 bytes - fits on the stack */ |
291 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
292 | |
293 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
294 | le16_to_cpus(&temp_desc.bcdUSB); |
295 | le16_to_cpus(&temp_desc.idVendor); | |
296 | le16_to_cpus(&temp_desc.idProduct); | |
297 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
298 | |
299 | len = sizeof(struct usb_device_descriptor) - pos; | |
300 | if (len > nbytes) | |
301 | len = nbytes; | |
8781ba0a | 302 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
303 | ret = -EFAULT; |
304 | goto err; | |
305 | } | |
1da177e4 LT |
306 | |
307 | *ppos += len; | |
308 | buf += len; | |
309 | nbytes -= len; | |
310 | ret += len; | |
311 | } | |
312 | ||
313 | pos = sizeof(struct usb_device_descriptor); | |
314 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
315 | struct usb_config_descriptor *config = | |
316 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
317 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
318 | ||
319 | if (*ppos < pos + length) { | |
320 | ||
321 | /* The descriptor may claim to be longer than it | |
322 | * really is. Here is the actual allocated length. */ | |
323 | unsigned alloclen = | |
324 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
325 | ||
326 | len = length - (*ppos - pos); | |
327 | if (len > nbytes) | |
328 | len = nbytes; | |
329 | ||
330 | /* Simply don't write (skip over) unallocated parts */ | |
331 | if (alloclen > (*ppos - pos)) { | |
332 | alloclen -= (*ppos - pos); | |
333 | if (copy_to_user(buf, | |
334 | dev->rawdescriptors[i] + (*ppos - pos), | |
335 | min(len, alloclen))) { | |
336 | ret = -EFAULT; | |
337 | goto err; | |
338 | } | |
339 | } | |
340 | ||
341 | *ppos += len; | |
342 | buf += len; | |
343 | nbytes -= len; | |
344 | ret += len; | |
345 | } | |
346 | ||
347 | pos += length; | |
348 | } | |
349 | ||
350 | err: | |
351 | usb_unlock_device(dev); | |
352 | return ret; | |
353 | } | |
354 | ||
355 | /* | |
356 | * async list handling | |
357 | */ | |
358 | ||
359 | static struct async *alloc_async(unsigned int numisoframes) | |
360 | { | |
dd95b814 | 361 | struct async *as; |
0a1ef3b5 | 362 | |
dd95b814 | 363 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
364 | if (!as) |
365 | return NULL; | |
1da177e4 LT |
366 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
367 | if (!as->urb) { | |
368 | kfree(as); | |
369 | return NULL; | |
370 | } | |
04e482ff | 371 | return as; |
1da177e4 LT |
372 | } |
373 | ||
374 | static void free_async(struct async *as) | |
375 | { | |
3d97ff63 HG |
376 | int i; |
377 | ||
2425c08b | 378 | put_pid(as->pid); |
1b41c832 SS |
379 | if (as->cred) |
380 | put_cred(as->cred); | |
3d97ff63 HG |
381 | for (i = 0; i < as->urb->num_sgs; i++) { |
382 | if (sg_page(&as->urb->sg[i])) | |
383 | kfree(sg_virt(&as->urb->sg[i])); | |
384 | } | |
f7d34b44 | 385 | |
3d97ff63 | 386 | kfree(as->urb->sg); |
f7d34b44 SG |
387 | if (as->usbm == NULL) |
388 | kfree(as->urb->transfer_buffer); | |
389 | else | |
390 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
391 | ||
6fd19f4b | 392 | kfree(as->urb->setup_packet); |
1da177e4 | 393 | usb_free_urb(as->urb); |
add1aaea | 394 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 395 | kfree(as); |
1da177e4 LT |
396 | } |
397 | ||
d34d9721 | 398 | static void async_newpending(struct async *as) |
1da177e4 | 399 | { |
9b6f0c4b | 400 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
401 | unsigned long flags; |
402 | ||
403 | spin_lock_irqsave(&ps->lock, flags); | |
404 | list_add_tail(&as->asynclist, &ps->async_pending); | |
405 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
406 | } |
407 | ||
d34d9721 | 408 | static void async_removepending(struct async *as) |
1da177e4 | 409 | { |
9b6f0c4b | 410 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
411 | unsigned long flags; |
412 | ||
413 | spin_lock_irqsave(&ps->lock, flags); | |
414 | list_del_init(&as->asynclist); | |
415 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
416 | } |
417 | ||
9b6f0c4b | 418 | static struct async *async_getcompleted(struct usb_dev_state *ps) |
1da177e4 | 419 | { |
04e482ff GKH |
420 | unsigned long flags; |
421 | struct async *as = NULL; | |
422 | ||
423 | spin_lock_irqsave(&ps->lock, flags); | |
424 | if (!list_empty(&ps->async_completed)) { | |
425 | as = list_entry(ps->async_completed.next, struct async, | |
426 | asynclist); | |
427 | list_del_init(&as->asynclist); | |
428 | } | |
429 | spin_unlock_irqrestore(&ps->lock, flags); | |
430 | return as; | |
1da177e4 LT |
431 | } |
432 | ||
9b6f0c4b | 433 | static struct async *async_getpending(struct usb_dev_state *ps, |
04e482ff | 434 | void __user *userurb) |
1da177e4 | 435 | { |
04e482ff | 436 | struct async *as; |
1da177e4 | 437 | |
1da177e4 LT |
438 | list_for_each_entry(as, &ps->async_pending, asynclist) |
439 | if (as->userurb == userurb) { | |
440 | list_del_init(&as->asynclist); | |
1da177e4 LT |
441 | return as; |
442 | } | |
4e09dcf2 | 443 | |
04e482ff | 444 | return NULL; |
1da177e4 LT |
445 | } |
446 | ||
4c6e8971 AS |
447 | static void snoop_urb(struct usb_device *udev, |
448 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
449 | int timeout_or_status, enum snoop_when when, |
450 | unsigned char *data, unsigned data_len) | |
e639dd3f | 451 | { |
4c6e8971 AS |
452 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
453 | static const char *dirs[] = {"out", "in"}; | |
454 | int ep; | |
455 | const char *t, *d; | |
e639dd3f GKH |
456 | |
457 | if (!usbfs_snoop) | |
458 | return; | |
459 | ||
4c6e8971 AS |
460 | ep = usb_pipeendpoint(pipe); |
461 | t = types[usb_pipetype(pipe)]; | |
462 | d = dirs[!!usb_pipein(pipe)]; | |
463 | ||
464 | if (userurb) { /* Async */ | |
465 | if (when == SUBMIT) | |
2f964780 | 466 | dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " |
4c6e8971 AS |
467 | "length %u\n", |
468 | userurb, ep, t, d, length); | |
469 | else | |
2f964780 | 470 | dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " |
4c6e8971 AS |
471 | "actual_length %u status %d\n", |
472 | userurb, ep, t, d, length, | |
473 | timeout_or_status); | |
474 | } else { | |
475 | if (when == SUBMIT) | |
476 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
477 | "timeout %d\n", | |
478 | ep, t, d, length, timeout_or_status); | |
479 | else | |
480 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
481 | "status %d\n", | |
482 | ep, t, d, length, timeout_or_status); | |
483 | } | |
0880aef4 | 484 | |
0290cc9f | 485 | data_len = min(data_len, usbfs_snoop_max); |
0880aef4 CF |
486 | if (data && data_len > 0) { |
487 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
488 | data, data_len, 1); | |
489 | } | |
e639dd3f GKH |
490 | } |
491 | ||
3d97ff63 HG |
492 | static void snoop_urb_data(struct urb *urb, unsigned len) |
493 | { | |
494 | int i, size; | |
495 | ||
0290cc9f AS |
496 | len = min(len, usbfs_snoop_max); |
497 | if (!usbfs_snoop || len == 0) | |
3d97ff63 HG |
498 | return; |
499 | ||
500 | if (urb->num_sgs == 0) { | |
501 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
502 | urb->transfer_buffer, len, 1); | |
503 | return; | |
504 | } | |
505 | ||
506 | for (i = 0; i < urb->num_sgs && len; i++) { | |
507 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
508 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
509 | sg_virt(&urb->sg[i]), size, 1); | |
510 | len -= size; | |
511 | } | |
512 | } | |
513 | ||
514 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
515 | { | |
516 | unsigned i, len, size; | |
517 | ||
518 | if (urb->number_of_packets > 0) /* Isochronous */ | |
519 | len = urb->transfer_buffer_length; | |
520 | else /* Non-Isoc */ | |
521 | len = urb->actual_length; | |
522 | ||
523 | if (urb->num_sgs == 0) { | |
524 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
525 | return -EFAULT; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | for (i = 0; i < urb->num_sgs && len; i++) { | |
530 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
531 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
532 | return -EFAULT; | |
533 | userbuffer += size; | |
534 | len -= size; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
01c6460f AS |
540 | #define AS_CONTINUATION 1 |
541 | #define AS_UNLINK 2 | |
542 | ||
9b6f0c4b | 543 | static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr) |
01c6460f AS |
544 | __releases(ps->lock) |
545 | __acquires(ps->lock) | |
546 | { | |
4e09dcf2 | 547 | struct urb *urb; |
01c6460f AS |
548 | struct async *as; |
549 | ||
550 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
551 | * including the first one without AS_CONTINUATION. If such an | |
552 | * URB is encountered then a new transfer has already started so | |
553 | * the endpoint doesn't need to be disabled; otherwise it does. | |
554 | */ | |
555 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
556 | if (as->bulk_addr == bulk_addr) { | |
557 | if (as->bulk_status != AS_CONTINUATION) | |
558 | goto rescan; | |
559 | as->bulk_status = AS_UNLINK; | |
560 | as->bulk_addr = 0; | |
561 | } | |
562 | } | |
563 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
564 | ||
565 | /* Now carefully unlink all the marked pending URBs */ | |
566 | rescan: | |
567 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
568 | if (as->bulk_status == AS_UNLINK) { | |
569 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
570 | urb = as->urb; |
571 | usb_get_urb(urb); | |
01c6460f | 572 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
573 | usb_unlink_urb(urb); |
574 | usb_put_urb(urb); | |
01c6460f AS |
575 | spin_lock(&ps->lock); |
576 | goto rescan; | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
7d12e780 | 581 | static void async_completed(struct urb *urb) |
1da177e4 | 582 | { |
04e482ff | 583 | struct async *as = urb->context; |
9b6f0c4b | 584 | struct usb_dev_state *ps = as->ps; |
ae7795bc | 585 | struct kernel_siginfo sinfo; |
516a1a07 | 586 | struct pid *pid = NULL; |
d178bc3a | 587 | const struct cred *cred = NULL; |
3f38dace | 588 | unsigned long flags; |
516a1a07 | 589 | int signr; |
1da177e4 | 590 | |
3f38dace | 591 | spin_lock_irqsave(&ps->lock, flags); |
04e482ff | 592 | list_move_tail(&as->asynclist, &ps->async_completed); |
e015268d | 593 | as->status = urb->status; |
516a1a07 ON |
594 | signr = as->signr; |
595 | if (signr) { | |
3b10db2b | 596 | clear_siginfo(&sinfo); |
1da177e4 | 597 | sinfo.si_signo = as->signr; |
e015268d | 598 | sinfo.si_errno = as->status; |
1da177e4 LT |
599 | sinfo.si_code = SI_ASYNCIO; |
600 | sinfo.si_addr = as->userurb; | |
aec01c58 | 601 | pid = get_pid(as->pid); |
d178bc3a | 602 | cred = get_cred(as->cred); |
1da177e4 | 603 | } |
e639dd3f | 604 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 605 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 | 606 | as->status, COMPLETE, NULL, 0); |
83ed07c5 | 607 | if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN) |
3d97ff63 HG |
608 | snoop_urb_data(urb, urb->actual_length); |
609 | ||
01c6460f AS |
610 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
611 | as->status != -ENOENT) | |
612 | cancel_bulk_urbs(ps, as->bulk_addr); | |
ed62ca2f DA |
613 | |
614 | wake_up(&ps->wait); | |
3f38dace | 615 | spin_unlock_irqrestore(&ps->lock, flags); |
516a1a07 | 616 | |
aec01c58 | 617 | if (signr) { |
6b4f3d01 | 618 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred); |
aec01c58 | 619 | put_pid(pid); |
d178bc3a | 620 | put_cred(cred); |
aec01c58 | 621 | } |
1da177e4 LT |
622 | } |
623 | ||
9b6f0c4b | 624 | static void destroy_async(struct usb_dev_state *ps, struct list_head *list) |
1da177e4 | 625 | { |
4e09dcf2 | 626 | struct urb *urb; |
1da177e4 LT |
627 | struct async *as; |
628 | unsigned long flags; | |
629 | ||
630 | spin_lock_irqsave(&ps->lock, flags); | |
631 | while (!list_empty(list)) { | |
632 | as = list_entry(list->next, struct async, asynclist); | |
633 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
634 | urb = as->urb; |
635 | usb_get_urb(urb); | |
1da177e4 LT |
636 | |
637 | /* drop the spinlock so the completion handler can run */ | |
638 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
639 | usb_kill_urb(urb); |
640 | usb_put_urb(urb); | |
1da177e4 LT |
641 | spin_lock_irqsave(&ps->lock, flags); |
642 | } | |
643 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
644 | } |
645 | ||
9b6f0c4b | 646 | static void destroy_async_on_interface(struct usb_dev_state *ps, |
04e482ff | 647 | unsigned int ifnum) |
1da177e4 LT |
648 | { |
649 | struct list_head *p, *q, hitlist; | |
650 | unsigned long flags; | |
651 | ||
652 | INIT_LIST_HEAD(&hitlist); | |
653 | spin_lock_irqsave(&ps->lock, flags); | |
654 | list_for_each_safe(p, q, &ps->async_pending) | |
655 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
656 | list_move_tail(p, &hitlist); | |
657 | spin_unlock_irqrestore(&ps->lock, flags); | |
658 | destroy_async(ps, &hitlist); | |
659 | } | |
660 | ||
9b6f0c4b | 661 | static void destroy_all_async(struct usb_dev_state *ps) |
1da177e4 | 662 | { |
04e482ff | 663 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
664 | } |
665 | ||
666 | /* | |
667 | * interface claims are made only at the request of user level code, | |
668 | * which can also release them (explicitly or by closing files). | |
669 | * they're also undone when devices disconnect. | |
670 | */ | |
671 | ||
04e482ff GKH |
672 | static int driver_probe(struct usb_interface *intf, |
673 | const struct usb_device_id *id) | |
1da177e4 LT |
674 | { |
675 | return -ENODEV; | |
676 | } | |
677 | ||
678 | static void driver_disconnect(struct usb_interface *intf) | |
679 | { | |
9b6f0c4b | 680 | struct usb_dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
681 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
682 | ||
683 | if (!ps) | |
684 | return; | |
685 | ||
686 | /* NOTE: this relies on usbcore having canceled and completed | |
687 | * all pending I/O requests; 2.6 does that. | |
688 | */ | |
689 | ||
690 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
691 | clear_bit(ifnum, &ps->ifclaimed); | |
692 | else | |
3b6004f3 GKH |
693 | dev_warn(&intf->dev, "interface number %u out of range\n", |
694 | ifnum); | |
1da177e4 | 695 | |
04e482ff | 696 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
697 | |
698 | /* force async requests to complete */ | |
699 | destroy_async_on_interface(ps, ifnum); | |
700 | } | |
701 | ||
2e2eb83f AS |
702 | /* The following routines are merely placeholders. There is no way |
703 | * to inform a user task about suspend or resumes. | |
704 | */ | |
705 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
706 | { | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static int driver_resume(struct usb_interface *intf) | |
711 | { | |
712 | return 0; | |
713 | } | |
714 | ||
1da177e4 | 715 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
716 | .name = "usbfs", |
717 | .probe = driver_probe, | |
718 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
719 | .suspend = driver_suspend, |
720 | .resume = driver_resume, | |
1da177e4 LT |
721 | }; |
722 | ||
9b6f0c4b | 723 | static int claimintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
724 | { |
725 | struct usb_device *dev = ps->dev; | |
726 | struct usb_interface *intf; | |
727 | int err; | |
728 | ||
729 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
730 | return -EINVAL; | |
731 | /* already claimed */ | |
732 | if (test_bit(ifnum, &ps->ifclaimed)) | |
733 | return 0; | |
734 | ||
d883f52e RG |
735 | if (ps->privileges_dropped && |
736 | !test_bit(ifnum, &ps->interface_allowed_mask)) | |
737 | return -EACCES; | |
738 | ||
1da177e4 LT |
739 | intf = usb_ifnum_to_if(dev, ifnum); |
740 | if (!intf) | |
741 | err = -ENOENT; | |
742 | else | |
743 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
744 | if (err == 0) |
745 | set_bit(ifnum, &ps->ifclaimed); | |
746 | return err; | |
747 | } | |
748 | ||
9b6f0c4b | 749 | static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
750 | { |
751 | struct usb_device *dev; | |
752 | struct usb_interface *intf; | |
753 | int err; | |
754 | ||
755 | err = -EINVAL; | |
756 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
757 | return err; | |
758 | dev = ps->dev; | |
1da177e4 LT |
759 | intf = usb_ifnum_to_if(dev, ifnum); |
760 | if (!intf) | |
761 | err = -ENOENT; | |
762 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
763 | usb_driver_release_interface(&usbfs_driver, intf); | |
764 | err = 0; | |
765 | } | |
1da177e4 LT |
766 | return err; |
767 | } | |
768 | ||
9b6f0c4b | 769 | static int checkintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
770 | { |
771 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
772 | return -EHOSTUNREACH; | |
773 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
774 | return -EINVAL; | |
775 | if (test_bit(ifnum, &ps->ifclaimed)) | |
776 | return 0; | |
777 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
778 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
779 | "interface %u before use\n", task_pid_nr(current), | |
780 | current->comm, ifnum); | |
1da177e4 LT |
781 | return claimintf(ps, ifnum); |
782 | } | |
783 | ||
784 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
785 | { | |
786 | unsigned int i, j, e; | |
04e482ff | 787 | struct usb_interface *intf; |
1da177e4 LT |
788 | struct usb_host_interface *alts; |
789 | struct usb_endpoint_descriptor *endpt; | |
790 | ||
791 | if (ep & ~(USB_DIR_IN|0xf)) | |
792 | return -EINVAL; | |
793 | if (!dev->actconfig) | |
794 | return -ESRCH; | |
795 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
796 | intf = dev->actconfig->interface[i]; | |
797 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 798 | alts = &intf->altsetting[j]; |
1da177e4 LT |
799 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
800 | endpt = &alts->endpoint[e].desc; | |
801 | if (endpt->bEndpointAddress == ep) | |
802 | return alts->desc.bInterfaceNumber; | |
803 | } | |
804 | } | |
805 | } | |
04e482ff | 806 | return -ENOENT; |
1da177e4 LT |
807 | } |
808 | ||
9b6f0c4b | 809 | static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype, |
393cbb51 | 810 | unsigned int request, unsigned int index) |
1da177e4 LT |
811 | { |
812 | int ret = 0; | |
393cbb51 | 813 | struct usb_host_interface *alt_setting; |
1da177e4 | 814 | |
6da9c990 DV |
815 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
816 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 817 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
818 | return -EHOSTUNREACH; |
819 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
820 | return 0; | |
821 | ||
393cbb51 MD |
822 | /* |
823 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
824 | * class specification, which we always want to allow as it is used |
825 | * to query things like ink level, etc. | |
393cbb51 MD |
826 | */ |
827 | if (requesttype == 0xa1 && request == 0) { | |
828 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
829 | index >> 8, index & 0xff); | |
830 | if (alt_setting | |
831 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 832 | return 0; |
393cbb51 MD |
833 | } |
834 | ||
1da177e4 LT |
835 | index &= 0xff; |
836 | switch (requesttype & USB_RECIP_MASK) { | |
837 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
838 | if ((index & ~USB_DIR_IN) == 0) |
839 | return 0; | |
04e482ff | 840 | ret = findintfep(ps->dev, index); |
831abf76 KG |
841 | if (ret < 0) { |
842 | /* | |
843 | * Some not fully compliant Win apps seem to get | |
844 | * index wrong and have the endpoint number here | |
845 | * rather than the endpoint address (with the | |
846 | * correct direction). Win does let this through, | |
847 | * so we'll not reject it here but leave it to | |
848 | * the device to not break KVM. But we warn. | |
849 | */ | |
850 | ret = findintfep(ps->dev, index ^ 0x80); | |
851 | if (ret >= 0) | |
852 | dev_info(&ps->dev->dev, | |
853 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
854 | __func__, task_pid_nr(current), | |
855 | current->comm, index, index ^ 0x80); | |
856 | } | |
04e482ff | 857 | if (ret >= 0) |
1da177e4 LT |
858 | ret = checkintf(ps, ret); |
859 | break; | |
860 | ||
861 | case USB_RECIP_INTERFACE: | |
862 | ret = checkintf(ps, index); | |
863 | break; | |
864 | } | |
865 | return ret; | |
866 | } | |
867 | ||
2fec32b0 HG |
868 | static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev, |
869 | unsigned char ep) | |
870 | { | |
871 | if (ep & USB_ENDPOINT_DIR_MASK) | |
872 | return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK]; | |
873 | else | |
874 | return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK]; | |
875 | } | |
876 | ||
3e75c6de | 877 | static int parse_usbdevfs_streams(struct usb_dev_state *ps, |
bcf7f6e3 HG |
878 | struct usbdevfs_streams __user *streams, |
879 | unsigned int *num_streams_ret, | |
880 | unsigned int *num_eps_ret, | |
881 | struct usb_host_endpoint ***eps_ret, | |
882 | struct usb_interface **intf_ret) | |
883 | { | |
884 | unsigned int i, num_streams, num_eps; | |
885 | struct usb_host_endpoint **eps; | |
886 | struct usb_interface *intf = NULL; | |
887 | unsigned char ep; | |
888 | int ifnum, ret; | |
889 | ||
890 | if (get_user(num_streams, &streams->num_streams) || | |
891 | get_user(num_eps, &streams->num_eps)) | |
892 | return -EFAULT; | |
893 | ||
894 | if (num_eps < 1 || num_eps > USB_MAXENDPOINTS) | |
895 | return -EINVAL; | |
896 | ||
897 | /* The XHCI controller allows max 2 ^ 16 streams */ | |
898 | if (num_streams_ret && (num_streams < 2 || num_streams > 65536)) | |
899 | return -EINVAL; | |
900 | ||
6da2ec56 | 901 | eps = kmalloc_array(num_eps, sizeof(*eps), GFP_KERNEL); |
bcf7f6e3 HG |
902 | if (!eps) |
903 | return -ENOMEM; | |
904 | ||
905 | for (i = 0; i < num_eps; i++) { | |
906 | if (get_user(ep, &streams->eps[i])) { | |
907 | ret = -EFAULT; | |
908 | goto error; | |
909 | } | |
910 | eps[i] = ep_to_host_endpoint(ps->dev, ep); | |
911 | if (!eps[i]) { | |
912 | ret = -EINVAL; | |
913 | goto error; | |
914 | } | |
915 | ||
916 | /* usb_alloc/free_streams operate on an usb_interface */ | |
917 | ifnum = findintfep(ps->dev, ep); | |
918 | if (ifnum < 0) { | |
919 | ret = ifnum; | |
920 | goto error; | |
921 | } | |
922 | ||
923 | if (i == 0) { | |
924 | ret = checkintf(ps, ifnum); | |
925 | if (ret < 0) | |
926 | goto error; | |
927 | intf = usb_ifnum_to_if(ps->dev, ifnum); | |
928 | } else { | |
929 | /* Verify all eps belong to the same interface */ | |
930 | if (ifnum != intf->altsetting->desc.bInterfaceNumber) { | |
931 | ret = -EINVAL; | |
932 | goto error; | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
937 | if (num_streams_ret) | |
938 | *num_streams_ret = num_streams; | |
939 | *num_eps_ret = num_eps; | |
940 | *eps_ret = eps; | |
941 | *intf_ret = intf; | |
942 | ||
943 | return 0; | |
944 | ||
945 | error: | |
946 | kfree(eps); | |
947 | return ret; | |
948 | } | |
949 | ||
61ad04a8 | 950 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 951 | { |
a80d5ff0 | 952 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 953 | } |
4592bf5a | 954 | |
61ad04a8 | 955 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
956 | { |
957 | struct device *dev; | |
958 | ||
a80d5ff0 DH |
959 | dev = bus_find_device(&usb_bus_type, NULL, |
960 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
961 | if (!dev) |
962 | return NULL; | |
69ab55d7 | 963 | return to_usb_device(dev); |
9f8b17e6 | 964 | } |
4592bf5a | 965 | |
1da177e4 LT |
966 | /* |
967 | * file operations | |
968 | */ | |
969 | static int usbdev_open(struct inode *inode, struct file *file) | |
970 | { | |
fbf82fd2 | 971 | struct usb_device *dev = NULL; |
9b6f0c4b | 972 | struct usb_dev_state *ps; |
1da177e4 LT |
973 | int ret; |
974 | ||
1da177e4 | 975 | ret = -ENOMEM; |
d883f52e | 976 | ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL); |
04e482ff | 977 | if (!ps) |
62e299e6 | 978 | goto out_free_ps; |
1da177e4 | 979 | |
01105a24 | 980 | ret = -ENODEV; |
61ad04a8 | 981 | |
62e299e6 AS |
982 | /* Protect against simultaneous removal or release */ |
983 | mutex_lock(&usbfs_mutex); | |
984 | ||
9f8b17e6 | 985 | /* usbdev device-node */ |
fbf82fd2 | 986 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 987 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 988 | |
62e299e6 AS |
989 | mutex_unlock(&usbfs_mutex); |
990 | ||
991 | if (!dev) | |
992 | goto out_free_ps; | |
993 | ||
994 | usb_lock_device(dev); | |
995 | if (dev->state == USB_STATE_NOTATTACHED) | |
996 | goto out_unlock_device; | |
997 | ||
94fcda1f | 998 | ret = usb_autoresume_device(dev); |
01d883d4 | 999 | if (ret) |
62e299e6 | 1000 | goto out_unlock_device; |
01d883d4 | 1001 | |
1da177e4 LT |
1002 | ps->dev = dev; |
1003 | ps->file = file; | |
d883f52e | 1004 | ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */ |
1da177e4 | 1005 | spin_lock_init(&ps->lock); |
316547fd | 1006 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
1007 | INIT_LIST_HEAD(&ps->async_pending); |
1008 | INIT_LIST_HEAD(&ps->async_completed); | |
f7d34b44 | 1009 | INIT_LIST_HEAD(&ps->memory_list); |
1da177e4 | 1010 | init_waitqueue_head(&ps->wait); |
2425c08b | 1011 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 1012 | ps->cred = get_current_cred(); |
527660a8 | 1013 | smp_wmb(); |
1da177e4 LT |
1014 | list_add_tail(&ps->list, &dev->filelist); |
1015 | file->private_data = ps; | |
62e299e6 | 1016 | usb_unlock_device(dev); |
2da41d5f AS |
1017 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
1018 | current->comm); | |
62e299e6 AS |
1019 | return ret; |
1020 | ||
1021 | out_unlock_device: | |
1022 | usb_unlock_device(dev); | |
1023 | usb_put_dev(dev); | |
1024 | out_free_ps: | |
1025 | kfree(ps); | |
4a2a8a2c | 1026 | return ret; |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | static int usbdev_release(struct inode *inode, struct file *file) | |
1030 | { | |
9b6f0c4b | 1031 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
1032 | struct usb_device *dev = ps->dev; |
1033 | unsigned int ifnum; | |
6ff10464 | 1034 | struct async *as; |
1da177e4 LT |
1035 | |
1036 | usb_lock_device(dev); | |
7cbe5dca | 1037 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 1038 | |
1da177e4 | 1039 | list_del_init(&ps->list); |
4a2a8a2c | 1040 | |
1da177e4 LT |
1041 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
1042 | ifnum++) { | |
1043 | if (test_bit(ifnum, &ps->ifclaimed)) | |
1044 | releaseintf(ps, ifnum); | |
1045 | } | |
1046 | destroy_all_async(ps); | |
94fcda1f | 1047 | usb_autosuspend_device(dev); |
1da177e4 LT |
1048 | usb_unlock_device(dev); |
1049 | usb_put_dev(dev); | |
2425c08b | 1050 | put_pid(ps->disc_pid); |
d178bc3a | 1051 | put_cred(ps->cred); |
6ff10464 AS |
1052 | |
1053 | as = async_getcompleted(ps); | |
1054 | while (as) { | |
1055 | free_async(as); | |
1056 | as = async_getcompleted(ps); | |
1057 | } | |
f7d34b44 | 1058 | |
1da177e4 | 1059 | kfree(ps); |
4a2a8a2c | 1060 | return 0; |
1da177e4 LT |
1061 | } |
1062 | ||
9b6f0c4b | 1063 | static int proc_control(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1064 | { |
1065 | struct usb_device *dev = ps->dev; | |
1066 | struct usbdevfs_ctrltransfer ctrl; | |
1067 | unsigned int tmo; | |
1068 | unsigned char *tbuf; | |
ff66e3ce | 1069 | unsigned wLength; |
4c6e8971 | 1070 | int i, pipe, ret; |
1da177e4 LT |
1071 | |
1072 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1073 | return -EFAULT; | |
393cbb51 MD |
1074 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
1075 | ctrl.wIndex); | |
04e482ff | 1076 | if (ret) |
1da177e4 | 1077 | return ret; |
ff66e3ce AM |
1078 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
1079 | if (wLength > PAGE_SIZE) | |
1da177e4 | 1080 | return -EINVAL; |
add1aaea AS |
1081 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1082 | sizeof(struct usb_ctrlrequest)); | |
1083 | if (ret) | |
1084 | return ret; | |
04e482ff | 1085 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
1086 | if (!tbuf) { |
1087 | ret = -ENOMEM; | |
1088 | goto done; | |
1089 | } | |
1da177e4 | 1090 | tmo = ctrl.timeout; |
0880aef4 CF |
1091 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
1092 | "bRequest=%02x wValue=%04x " | |
1093 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
1094 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
1095 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 1096 | if (ctrl.bRequestType & 0x80) { |
96d4f267 | 1097 | if (ctrl.wLength && !access_ok(ctrl.data, |
04e482ff | 1098 | ctrl.wLength)) { |
52fb743d AS |
1099 | ret = -EINVAL; |
1100 | goto done; | |
1da177e4 | 1101 | } |
4c6e8971 | 1102 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 1103 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
1104 | |
1105 | usb_unlock_device(dev); | |
4c6e8971 | 1106 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
1107 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
1108 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1109 | usb_lock_device(dev); |
0880aef4 | 1110 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 1111 | tbuf, max(i, 0)); |
1da177e4 | 1112 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 1113 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
1114 | ret = -EFAULT; |
1115 | goto done; | |
1da177e4 LT |
1116 | } |
1117 | } | |
1118 | } else { | |
1119 | if (ctrl.wLength) { | |
1120 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
1121 | ret = -EFAULT; |
1122 | goto done; | |
1da177e4 LT |
1123 | } |
1124 | } | |
4c6e8971 | 1125 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
1126 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
1127 | tbuf, ctrl.wLength); | |
4c6e8971 | 1128 | |
1da177e4 | 1129 | usb_unlock_device(dev); |
04e482ff GKH |
1130 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
1131 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
1132 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1133 | usb_lock_device(dev); |
0880aef4 | 1134 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 1135 | } |
04e482ff | 1136 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
1137 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
1138 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
1139 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
1140 | ctrl.wLength, i); | |
1141 | } | |
52fb743d AS |
1142 | ret = i; |
1143 | done: | |
1144 | free_page((unsigned long) tbuf); | |
add1aaea AS |
1145 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1146 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 1147 | return ret; |
1da177e4 LT |
1148 | } |
1149 | ||
9b6f0c4b | 1150 | static int proc_bulk(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1151 | { |
1152 | struct usb_device *dev = ps->dev; | |
1153 | struct usbdevfs_bulktransfer bulk; | |
1154 | unsigned int tmo, len1, pipe; | |
1155 | int len2; | |
1156 | unsigned char *tbuf; | |
4c6e8971 | 1157 | int i, ret; |
1da177e4 LT |
1158 | |
1159 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
1160 | return -EFAULT; | |
04e482ff GKH |
1161 | ret = findintfep(ps->dev, bulk.ep); |
1162 | if (ret < 0) | |
1da177e4 | 1163 | return ret; |
04e482ff GKH |
1164 | ret = checkintf(ps, ret); |
1165 | if (ret) | |
1da177e4 LT |
1166 | return ret; |
1167 | if (bulk.ep & USB_DIR_IN) | |
1168 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
1169 | else | |
1170 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
1171 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
1172 | return -EINVAL; | |
1173 | len1 = bulk.len; | |
1129d270 | 1174 | if (len1 >= (INT_MAX - sizeof(struct urb))) |
1da177e4 | 1175 | return -EINVAL; |
add1aaea AS |
1176 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1177 | if (ret) | |
1178 | return ret; | |
135551ea KB |
1179 | tbuf = kmalloc(len1, GFP_KERNEL); |
1180 | if (!tbuf) { | |
add1aaea AS |
1181 | ret = -ENOMEM; |
1182 | goto done; | |
1183 | } | |
1da177e4 LT |
1184 | tmo = bulk.timeout; |
1185 | if (bulk.ep & 0x80) { | |
96d4f267 | 1186 | if (len1 && !access_ok(bulk.data, len1)) { |
52fb743d AS |
1187 | ret = -EINVAL; |
1188 | goto done; | |
1da177e4 | 1189 | } |
0880aef4 | 1190 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1191 | |
1da177e4 LT |
1192 | usb_unlock_device(dev); |
1193 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1194 | usb_lock_device(dev); | |
0880aef4 | 1195 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1196 | |
1da177e4 LT |
1197 | if (!i && len2) { |
1198 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1199 | ret = -EFAULT; |
1200 | goto done; | |
1da177e4 LT |
1201 | } |
1202 | } | |
1203 | } else { | |
1204 | if (len1) { | |
1205 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1206 | ret = -EFAULT; |
1207 | goto done; | |
1da177e4 LT |
1208 | } |
1209 | } | |
0880aef4 | 1210 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
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, NULL, 0); |
1da177e4 | 1216 | } |
52fb743d AS |
1217 | ret = (i < 0 ? i : len2); |
1218 | done: | |
1da177e4 | 1219 | kfree(tbuf); |
add1aaea | 1220 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1221 | return ret; |
1da177e4 LT |
1222 | } |
1223 | ||
f080a51b AS |
1224 | static void check_reset_of_active_ep(struct usb_device *udev, |
1225 | unsigned int epnum, char *ioctl_name) | |
1226 | { | |
1227 | struct usb_host_endpoint **eps; | |
1228 | struct usb_host_endpoint *ep; | |
1229 | ||
1230 | eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out; | |
1231 | ep = eps[epnum & 0x0f]; | |
1232 | if (ep && !list_empty(&ep->urb_list)) | |
1233 | dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n", | |
1234 | task_pid_nr(current), current->comm, | |
1235 | ioctl_name, epnum); | |
1236 | } | |
1237 | ||
9b6f0c4b | 1238 | static int proc_resetep(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1239 | { |
1240 | unsigned int ep; | |
1241 | int ret; | |
1242 | ||
1243 | if (get_user(ep, (unsigned int __user *)arg)) | |
1244 | return -EFAULT; | |
04e482ff GKH |
1245 | ret = findintfep(ps->dev, ep); |
1246 | if (ret < 0) | |
1da177e4 | 1247 | return ret; |
04e482ff GKH |
1248 | ret = checkintf(ps, ret); |
1249 | if (ret) | |
1da177e4 | 1250 | return ret; |
f080a51b | 1251 | check_reset_of_active_ep(ps->dev, ep, "RESETEP"); |
3444b26a | 1252 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1253 | return 0; |
1254 | } | |
1255 | ||
9b6f0c4b | 1256 | static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1257 | { |
1258 | unsigned int ep; | |
1259 | int pipe; | |
1260 | int ret; | |
1261 | ||
1262 | if (get_user(ep, (unsigned int __user *)arg)) | |
1263 | return -EFAULT; | |
04e482ff GKH |
1264 | ret = findintfep(ps->dev, ep); |
1265 | if (ret < 0) | |
1da177e4 | 1266 | return ret; |
04e482ff GKH |
1267 | ret = checkintf(ps, ret); |
1268 | if (ret) | |
1da177e4 | 1269 | return ret; |
f080a51b | 1270 | check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT"); |
1da177e4 | 1271 | if (ep & USB_DIR_IN) |
04e482ff GKH |
1272 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1273 | else | |
1274 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1275 | |
1276 | return usb_clear_halt(ps->dev, pipe); | |
1277 | } | |
1da177e4 | 1278 | |
9b6f0c4b | 1279 | static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1280 | { |
1281 | struct usbdevfs_getdriver gd; | |
1282 | struct usb_interface *intf; | |
1283 | int ret; | |
1284 | ||
1285 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1286 | return -EFAULT; | |
1da177e4 LT |
1287 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1288 | if (!intf || !intf->dev.driver) | |
1289 | ret = -ENODATA; | |
1290 | else { | |
b11b2e1b | 1291 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1292 | sizeof(gd.driver)); |
1293 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1294 | } | |
1da177e4 LT |
1295 | return ret; |
1296 | } | |
1297 | ||
9b6f0c4b | 1298 | static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1299 | { |
681fef83 KL |
1300 | struct usbdevfs_connectinfo ci; |
1301 | ||
1302 | memset(&ci, 0, sizeof(ci)); | |
1303 | ci.devnum = ps->dev->devnum; | |
1304 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
1da177e4 | 1305 | |
1da177e4 LT |
1306 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1307 | return -EFAULT; | |
1308 | return 0; | |
1309 | } | |
1310 | ||
9b6f0c4b | 1311 | static int proc_resetdevice(struct usb_dev_state *ps) |
1da177e4 | 1312 | { |
d883f52e RG |
1313 | struct usb_host_config *actconfig = ps->dev->actconfig; |
1314 | struct usb_interface *interface; | |
1315 | int i, number; | |
1316 | ||
1317 | /* Don't allow a device reset if the process has dropped the | |
1318 | * privilege to do such things and any of the interfaces are | |
1319 | * currently claimed. | |
1320 | */ | |
1321 | if (ps->privileges_dropped && actconfig) { | |
1322 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1323 | interface = actconfig->interface[i]; | |
1324 | number = interface->cur_altsetting->desc.bInterfaceNumber; | |
1325 | if (usb_interface_claimed(interface) && | |
1326 | !test_bit(number, &ps->ifclaimed)) { | |
1327 | dev_warn(&ps->dev->dev, | |
1328 | "usbfs: interface %d claimed by %s while '%s' resets device\n", | |
1329 | number, interface->dev.driver->name, current->comm); | |
1330 | return -EACCES; | |
1331 | } | |
1332 | } | |
1333 | } | |
1334 | ||
742120c6 | 1335 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1336 | } |
1337 | ||
9b6f0c4b | 1338 | static int proc_setintf(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1339 | { |
1340 | struct usbdevfs_setinterface setintf; | |
1341 | int ret; | |
1342 | ||
1343 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1344 | return -EFAULT; | |
135551ea KB |
1345 | ret = checkintf(ps, setintf.interface); |
1346 | if (ret) | |
1da177e4 | 1347 | return ret; |
5ec9c177 HG |
1348 | |
1349 | destroy_async_on_interface(ps, setintf.interface); | |
1350 | ||
1da177e4 LT |
1351 | return usb_set_interface(ps->dev, setintf.interface, |
1352 | setintf.altsetting); | |
1353 | } | |
1354 | ||
9b6f0c4b | 1355 | static int proc_setconfig(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1356 | { |
3f141e2a | 1357 | int u; |
1da177e4 | 1358 | int status = 0; |
04e482ff | 1359 | struct usb_host_config *actconfig; |
1da177e4 | 1360 | |
3f141e2a | 1361 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1362 | return -EFAULT; |
1363 | ||
04e482ff GKH |
1364 | actconfig = ps->dev->actconfig; |
1365 | ||
1366 | /* Don't touch the device if any interfaces are claimed. | |
1367 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1368 | * an interface is claimed by usbfs it could easily deadlock. |
1369 | */ | |
04e482ff GKH |
1370 | if (actconfig) { |
1371 | int i; | |
1372 | ||
1373 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1374 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1375 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1376 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1377 | "while '%s' sets config #%d\n", |
1378 | actconfig->interface[i] | |
1379 | ->cur_altsetting | |
1380 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1381 | actconfig->interface[i] |
1382 | ->dev.driver->name, | |
1da177e4 | 1383 | current->comm, u); |
04e482ff | 1384 | status = -EBUSY; |
1da177e4 | 1385 | break; |
1da177e4 | 1386 | } |
04e482ff GKH |
1387 | } |
1388 | } | |
1da177e4 LT |
1389 | |
1390 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1391 | * so avoid usb_set_configuration()'s kick to sysfs | |
1392 | */ | |
1393 | if (status == 0) { | |
1394 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1395 | status = usb_reset_configuration(ps->dev); | |
1396 | else | |
1397 | status = usb_set_configuration(ps->dev, u); | |
1398 | } | |
1399 | ||
1400 | return status; | |
1401 | } | |
1402 | ||
f7d34b44 SG |
1403 | static struct usb_memory * |
1404 | find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb) | |
1405 | { | |
1406 | struct usb_memory *usbm = NULL, *iter; | |
1407 | unsigned long flags; | |
1408 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1409 | ||
1410 | spin_lock_irqsave(&ps->lock, flags); | |
1411 | list_for_each_entry(iter, &ps->memory_list, memlist) { | |
1412 | if (uurb_start >= iter->vm_start && | |
1413 | uurb_start < iter->vm_start + iter->size) { | |
1414 | if (uurb->buffer_length > iter->vm_start + iter->size - | |
1415 | uurb_start) { | |
1416 | usbm = ERR_PTR(-EINVAL); | |
1417 | } else { | |
1418 | usbm = iter; | |
1419 | usbm->urb_use_count++; | |
1420 | } | |
1421 | break; | |
1422 | } | |
1423 | } | |
1424 | spin_unlock_irqrestore(&ps->lock, flags); | |
1425 | return usbm; | |
1426 | } | |
1427 | ||
9b6f0c4b | 1428 | static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1429 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1430 | void __user *arg) | |
1da177e4 LT |
1431 | { |
1432 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1433 | struct usb_host_endpoint *ep; | |
52fb743d | 1434 | struct async *as = NULL; |
1da177e4 LT |
1435 | struct usb_ctrlrequest *dr = NULL; |
1436 | unsigned int u, totlen, isofrmlen; | |
7a68d9fb | 1437 | int i, ret, num_sgs = 0, ifnum = -1; |
b2d03eb5 | 1438 | int number_of_packets = 0; |
948cd8c1 | 1439 | unsigned int stream_id = 0; |
3d97ff63 | 1440 | void *buf; |
7a68d9fb ON |
1441 | bool is_in; |
1442 | bool allow_short = false; | |
1443 | bool allow_zero = false; | |
446f666d | 1444 | unsigned long mask = USBDEVFS_URB_SHORT_NOT_OK | |
01c6460f | 1445 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1446 | USBDEVFS_URB_NO_FSBR | |
1447 | USBDEVFS_URB_ZERO_PACKET | | |
446f666d ON |
1448 | USBDEVFS_URB_NO_INTERRUPT; |
1449 | /* USBDEVFS_URB_ISO_ASAP is a special case */ | |
1450 | if (uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1451 | mask |= USBDEVFS_URB_ISO_ASAP; | |
1452 | ||
1453 | if (uurb->flags & ~mask) | |
1454 | return -EINVAL; | |
1455 | ||
57999d11 DC |
1456 | if ((unsigned int)uurb->buffer_length >= USBFS_XFER_MAX) |
1457 | return -EINVAL; | |
9180135b | 1458 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1459 | return -EINVAL; |
04e482ff GKH |
1460 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1461 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1462 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1463 | if (ifnum < 0) | |
1da177e4 | 1464 | return ifnum; |
04e482ff GKH |
1465 | ret = checkintf(ps, ifnum); |
1466 | if (ret) | |
1da177e4 LT |
1467 | return ret; |
1468 | } | |
2fec32b0 | 1469 | ep = ep_to_host_endpoint(ps->dev, uurb->endpoint); |
1da177e4 LT |
1470 | if (!ep) |
1471 | return -ENOENT; | |
2fec32b0 | 1472 | is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0; |
add1aaea AS |
1473 | |
1474 | u = 0; | |
f355e830 | 1475 | switch (uurb->type) { |
1da177e4 | 1476 | case USBDEVFS_URB_TYPE_CONTROL: |
93cf9b90 | 1477 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1478 | return -EINVAL; |
add1aaea AS |
1479 | /* min 8 byte setup packet */ |
1480 | if (uurb->buffer_length < 8) | |
1da177e4 | 1481 | return -EINVAL; |
04e482ff GKH |
1482 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1483 | if (!dr) | |
1da177e4 LT |
1484 | return -ENOMEM; |
1485 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1486 | ret = -EFAULT; |
1487 | goto error; | |
1da177e4 LT |
1488 | } |
1489 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1490 | ret = -EINVAL; |
1491 | goto error; | |
1da177e4 | 1492 | } |
393cbb51 | 1493 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1494 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1495 | if (ret) |
1496 | goto error; | |
1da177e4 LT |
1497 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
1498 | uurb->buffer += 8; | |
93cf9b90 AS |
1499 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1500 | is_in = 1; | |
1501 | uurb->endpoint |= USB_DIR_IN; | |
1502 | } else { | |
1503 | is_in = 0; | |
1504 | uurb->endpoint &= ~USB_DIR_IN; | |
1505 | } | |
665c365a AS |
1506 | if (is_in) |
1507 | allow_short = true; | |
0880aef4 CF |
1508 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1509 | "bRequest=%02x wValue=%04x " | |
1510 | "wIndex=%04x wLength=%04x\n", | |
1511 | dr->bRequestType, dr->bRequest, | |
1512 | __le16_to_cpup(&dr->wValue), | |
1513 | __le16_to_cpup(&dr->wIndex), | |
1514 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1515 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1516 | break; |
1517 | ||
1518 | case USBDEVFS_URB_TYPE_BULK: | |
7a68d9fb ON |
1519 | if (!is_in) |
1520 | allow_zero = true; | |
1521 | else | |
1522 | allow_short = true; | |
93cf9b90 | 1523 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1524 | case USB_ENDPOINT_XFER_CONTROL: |
1525 | case USB_ENDPOINT_XFER_ISOC: | |
1526 | return -EINVAL; | |
f661c6f8 AS |
1527 | case USB_ENDPOINT_XFER_INT: |
1528 | /* allow single-shot interrupt transfers */ | |
1529 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1530 | goto interrupt_urb; | |
1da177e4 | 1531 | } |
3d97ff63 HG |
1532 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1533 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1534 | num_sgs = 0; | |
948cd8c1 HG |
1535 | if (ep->streams) |
1536 | stream_id = uurb->stream_id; | |
1da177e4 LT |
1537 | break; |
1538 | ||
f661c6f8 AS |
1539 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1540 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1541 | return -EINVAL; | |
1542 | interrupt_urb: | |
7a68d9fb ON |
1543 | if (!is_in) |
1544 | allow_zero = true; | |
1545 | else | |
1546 | allow_short = true; | |
f661c6f8 AS |
1547 | break; |
1548 | ||
1da177e4 LT |
1549 | case USBDEVFS_URB_TYPE_ISO: |
1550 | /* arbitrary limit */ | |
04e482ff GKH |
1551 | if (uurb->number_of_packets < 1 || |
1552 | uurb->number_of_packets > 128) | |
1da177e4 | 1553 | return -EINVAL; |
93cf9b90 | 1554 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1555 | return -EINVAL; |
b2d03eb5 | 1556 | number_of_packets = uurb->number_of_packets; |
04e482ff | 1557 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
b2d03eb5 | 1558 | number_of_packets; |
73a02d32 RP |
1559 | isopkt = memdup_user(iso_frame_desc, isofrmlen); |
1560 | if (IS_ERR(isopkt)) { | |
1561 | ret = PTR_ERR(isopkt); | |
1562 | isopkt = NULL; | |
52fb743d | 1563 | goto error; |
1da177e4 | 1564 | } |
b2d03eb5 | 1565 | for (totlen = u = 0; u < number_of_packets; u++) { |
e2e2f0ea FM |
1566 | /* |
1567 | * arbitrary limit need for USB 3.0 | |
1568 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1569 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1570 | * sizemax: 1024 * 16 * 3 = 49152 | |
1571 | */ | |
1572 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1573 | ret = -EINVAL; |
1574 | goto error; | |
1da177e4 LT |
1575 | } |
1576 | totlen += isopkt[u].length; | |
1577 | } | |
add1aaea | 1578 | u *= sizeof(struct usb_iso_packet_descriptor); |
845d584f | 1579 | uurb->buffer_length = totlen; |
1da177e4 LT |
1580 | break; |
1581 | ||
1da177e4 LT |
1582 | default: |
1583 | return -EINVAL; | |
1584 | } | |
add1aaea | 1585 | |
9180135b | 1586 | if (uurb->buffer_length > 0 && |
96d4f267 | 1587 | !access_ok(uurb->buffer, uurb->buffer_length)) { |
52fb743d AS |
1588 | ret = -EFAULT; |
1589 | goto error; | |
1da177e4 | 1590 | } |
b2d03eb5 | 1591 | as = alloc_async(number_of_packets); |
9180135b | 1592 | if (!as) { |
52fb743d AS |
1593 | ret = -ENOMEM; |
1594 | goto error; | |
1da177e4 | 1595 | } |
3d97ff63 | 1596 | |
f7d34b44 SG |
1597 | as->usbm = find_memory_area(ps, uurb); |
1598 | if (IS_ERR(as->usbm)) { | |
1599 | ret = PTR_ERR(as->usbm); | |
1600 | as->usbm = NULL; | |
1601 | goto error; | |
1602 | } | |
1603 | ||
1604 | /* do not use SG buffers when memory mapped segments | |
1605 | * are in use | |
1606 | */ | |
1607 | if (as->usbm) | |
1608 | num_sgs = 0; | |
1609 | ||
3d97ff63 HG |
1610 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + |
1611 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1612 | ret = usbfs_increase_memory_usage(u); |
1613 | if (ret) | |
1614 | goto error; | |
1615 | as->mem_usage = u; | |
1616 | ||
3d97ff63 | 1617 | if (num_sgs) { |
6da2ec56 KC |
1618 | as->urb->sg = kmalloc_array(num_sgs, |
1619 | sizeof(struct scatterlist), | |
1620 | GFP_KERNEL); | |
3d97ff63 HG |
1621 | if (!as->urb->sg) { |
1622 | ret = -ENOMEM; | |
1623 | goto error; | |
1624 | } | |
1625 | as->urb->num_sgs = num_sgs; | |
1626 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1627 | ||
1628 | totlen = uurb->buffer_length; | |
1629 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1630 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1631 | buf = kmalloc(u, GFP_KERNEL); | |
1632 | if (!buf) { | |
1633 | ret = -ENOMEM; | |
1634 | goto error; | |
1635 | } | |
1636 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1637 | ||
1638 | if (!is_in) { | |
1639 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1640 | ret = -EFAULT; | |
1641 | goto error; | |
1642 | } | |
01463900 | 1643 | uurb->buffer += u; |
3d97ff63 HG |
1644 | } |
1645 | totlen -= u; | |
1646 | } | |
1647 | } else if (uurb->buffer_length > 0) { | |
f7d34b44 SG |
1648 | if (as->usbm) { |
1649 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
3d97ff63 | 1650 | |
f7d34b44 SG |
1651 | as->urb->transfer_buffer = as->usbm->mem + |
1652 | (uurb_start - as->usbm->vm_start); | |
1653 | } else { | |
1654 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1655 | GFP_KERNEL); | |
1656 | if (!as->urb->transfer_buffer) { | |
1657 | ret = -ENOMEM; | |
3d97ff63 HG |
1658 | goto error; |
1659 | } | |
f7d34b44 SG |
1660 | if (!is_in) { |
1661 | if (copy_from_user(as->urb->transfer_buffer, | |
1662 | uurb->buffer, | |
1663 | uurb->buffer_length)) { | |
1664 | ret = -EFAULT; | |
1665 | goto error; | |
1666 | } | |
1667 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1668 | /* | |
1669 | * Isochronous input data may end up being | |
1670 | * discontiguous if some of the packets are | |
1671 | * short. Clear the buffer so that the gaps | |
1672 | * don't leak kernel data to userspace. | |
1673 | */ | |
1674 | memset(as->urb->transfer_buffer, 0, | |
1675 | uurb->buffer_length); | |
1676 | } | |
3d97ff63 | 1677 | } |
9180135b | 1678 | } |
04e482ff GKH |
1679 | as->urb->dev = ps->dev; |
1680 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1681 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1682 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1683 | |
1684 | /* This tedious sequence is necessary because the URB_* flags | |
1685 | * are internal to the kernel and subject to change, whereas | |
1686 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1687 | */ | |
1688 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1689 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1690 | u |= URB_ISO_ASAP; | |
7a68d9fb | 1691 | if (allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) |
14722ef4 | 1692 | u |= URB_SHORT_NOT_OK; |
7a68d9fb | 1693 | if (allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET) |
14722ef4 AS |
1694 | u |= URB_ZERO_PACKET; |
1695 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1696 | u |= URB_NO_INTERRUPT; | |
1697 | as->urb->transfer_flags = u; | |
1698 | ||
81e0403b ON |
1699 | if (!allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) |
1700 | dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK.\n"); | |
1701 | if (!allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1702 | dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_ZERO_PACKET.\n"); | |
1703 | ||
1da177e4 | 1704 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1705 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1706 | dr = NULL; |
1da177e4 | 1707 | as->urb->start_frame = uurb->start_frame; |
b2d03eb5 | 1708 | as->urb->number_of_packets = number_of_packets; |
948cd8c1 | 1709 | as->urb->stream_id = stream_id; |
53e5f36f AS |
1710 | |
1711 | if (ep->desc.bInterval) { | |
1712 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || | |
1713 | ps->dev->speed == USB_SPEED_HIGH || | |
1714 | ps->dev->speed >= USB_SPEED_SUPER) | |
1715 | as->urb->interval = 1 << | |
1716 | min(15, ep->desc.bInterval - 1); | |
1717 | else | |
1718 | as->urb->interval = ep->desc.bInterval; | |
1719 | } | |
1720 | ||
04e482ff GKH |
1721 | as->urb->context = as; |
1722 | as->urb->complete = async_completed; | |
b2d03eb5 | 1723 | for (totlen = u = 0; u < number_of_packets; u++) { |
1da177e4 LT |
1724 | as->urb->iso_frame_desc[u].offset = totlen; |
1725 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1726 | totlen += isopkt[u].length; | |
1727 | } | |
6fd19f4b | 1728 | kfree(isopkt); |
52fb743d | 1729 | isopkt = NULL; |
1da177e4 | 1730 | as->ps = ps; |
04e482ff | 1731 | as->userurb = arg; |
f7d34b44 SG |
1732 | if (as->usbm) { |
1733 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1734 | ||
1735 | as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1736 | as->urb->transfer_dma = as->usbm->dma_handle + | |
1737 | (uurb_start - as->usbm->vm_start); | |
1738 | } else if (is_in && uurb->buffer_length > 0) | |
1da177e4 | 1739 | as->userbuffer = uurb->buffer; |
1da177e4 LT |
1740 | as->signr = uurb->signr; |
1741 | as->ifnum = ifnum; | |
2425c08b | 1742 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1743 | as->cred = get_current_cred(); |
4c6e8971 | 1744 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1745 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1746 | NULL, 0); |
1747 | if (!is_in) | |
1748 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1749 | ||
04e482ff | 1750 | async_newpending(as); |
01c6460f AS |
1751 | |
1752 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1753 | spin_lock_irq(&ps->lock); | |
1754 | ||
1755 | /* Not exactly the endpoint address; the direction bit is | |
1756 | * shifted to the 0x10 position so that the value will be | |
1757 | * between 0 and 31. | |
1758 | */ | |
1759 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1760 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1761 | >> 3); | |
1762 | ||
1763 | /* If this bulk URB is the start of a new transfer, re-enable | |
1764 | * the endpoint. Otherwise mark it as a continuation URB. | |
1765 | */ | |
1766 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1767 | as->bulk_status = AS_CONTINUATION; | |
1768 | else | |
1769 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1770 | ||
1771 | /* Don't accept continuation URBs if the endpoint is | |
1772 | * disabled because of an earlier error. | |
1773 | */ | |
1774 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1775 | ret = -EREMOTEIO; | |
1776 | else | |
1777 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1778 | spin_unlock_irq(&ps->lock); | |
1779 | } else { | |
1780 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1781 | } | |
1782 | ||
1783 | if (ret) { | |
04e482ff GKH |
1784 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1785 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1786 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1787 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1788 | async_removepending(as); |
52fb743d | 1789 | goto error; |
04e482ff GKH |
1790 | } |
1791 | return 0; | |
52fb743d AS |
1792 | |
1793 | error: | |
f7d34b44 SG |
1794 | if (as && as->usbm) |
1795 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
52fb743d AS |
1796 | kfree(isopkt); |
1797 | kfree(dr); | |
1798 | if (as) | |
1799 | free_async(as); | |
1800 | return ret; | |
1da177e4 LT |
1801 | } |
1802 | ||
9b6f0c4b | 1803 | static int proc_submiturb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1804 | { |
1805 | struct usbdevfs_urb uurb; | |
1806 | ||
1807 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1808 | return -EFAULT; | |
1809 | ||
04e482ff GKH |
1810 | return proc_do_submiturb(ps, &uurb, |
1811 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1812 | arg); | |
1da177e4 LT |
1813 | } |
1814 | ||
9b6f0c4b | 1815 | static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1816 | { |
4e09dcf2 | 1817 | struct urb *urb; |
1da177e4 | 1818 | struct async *as; |
4e09dcf2 | 1819 | unsigned long flags; |
1da177e4 | 1820 | |
4e09dcf2 | 1821 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1822 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1823 | if (!as) { |
1824 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1825 | return -EINVAL; |
4e09dcf2 HL |
1826 | } |
1827 | ||
1828 | urb = as->urb; | |
1829 | usb_get_urb(urb); | |
1830 | spin_unlock_irqrestore(&ps->lock, flags); | |
1831 | ||
1832 | usb_kill_urb(urb); | |
1833 | usb_put_urb(urb); | |
1834 | ||
1da177e4 LT |
1835 | return 0; |
1836 | } | |
1837 | ||
2ef47001 AS |
1838 | static void compute_isochronous_actual_length(struct urb *urb) |
1839 | { | |
1840 | unsigned int i; | |
1841 | ||
1842 | if (urb->number_of_packets > 0) { | |
1843 | urb->actual_length = 0; | |
1844 | for (i = 0; i < urb->number_of_packets; i++) | |
1845 | urb->actual_length += | |
1846 | urb->iso_frame_desc[i].actual_length; | |
1847 | } | |
1848 | } | |
1849 | ||
1da177e4 LT |
1850 | static int processcompl(struct async *as, void __user * __user *arg) |
1851 | { | |
1852 | struct urb *urb = as->urb; | |
1853 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1854 | void __user *addr = as->userurb; | |
1855 | unsigned int i; | |
1856 | ||
2ef47001 | 1857 | compute_isochronous_actual_length(urb); |
7152b592 | 1858 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1859 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1860 | goto err_out; |
7152b592 | 1861 | } |
e015268d | 1862 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1863 | goto err_out; |
1da177e4 | 1864 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1865 | goto err_out; |
1da177e4 | 1866 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1867 | goto err_out; |
1da177e4 | 1868 | |
93cf9b90 | 1869 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1870 | for (i = 0; i < urb->number_of_packets; i++) { |
1871 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1872 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1873 | goto err_out; |
668a9541 CL |
1874 | if (put_user(urb->iso_frame_desc[i].status, |
1875 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1876 | goto err_out; |
668a9541 | 1877 | } |
1da177e4 LT |
1878 | } |
1879 | ||
1da177e4 LT |
1880 | if (put_user(addr, (void __user * __user *)arg)) |
1881 | return -EFAULT; | |
1882 | return 0; | |
d794a021 ON |
1883 | |
1884 | err_out: | |
d794a021 | 1885 | return -EFAULT; |
1da177e4 LT |
1886 | } |
1887 | ||
9b6f0c4b | 1888 | static struct async *reap_as(struct usb_dev_state *ps) |
1da177e4 | 1889 | { |
04e482ff | 1890 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1891 | struct async *as = NULL; |
1892 | struct usb_device *dev = ps->dev; | |
1893 | ||
1894 | add_wait_queue(&ps->wait, &wait); | |
1895 | for (;;) { | |
1896 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff | 1897 | as = async_getcompleted(ps); |
3f2cee73 | 1898 | if (as || !connected(ps)) |
1da177e4 LT |
1899 | break; |
1900 | if (signal_pending(current)) | |
1901 | break; | |
1902 | usb_unlock_device(dev); | |
1903 | schedule(); | |
1904 | usb_lock_device(dev); | |
1905 | } | |
1906 | remove_wait_queue(&ps->wait, &wait); | |
1907 | set_current_state(TASK_RUNNING); | |
1908 | return as; | |
1909 | } | |
1910 | ||
9b6f0c4b | 1911 | static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1912 | { |
1913 | struct async *as = reap_as(ps); | |
a016a816 | 1914 | |
ddeee0b2 | 1915 | if (as) { |
a016a816 AS |
1916 | int retval; |
1917 | ||
2f964780 | 1918 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
a016a816 | 1919 | retval = processcompl(as, (void __user * __user *)arg); |
ddeee0b2 LT |
1920 | free_async(as); |
1921 | return retval; | |
1922 | } | |
1da177e4 LT |
1923 | if (signal_pending(current)) |
1924 | return -EINTR; | |
3f2cee73 | 1925 | return -ENODEV; |
1da177e4 LT |
1926 | } |
1927 | ||
9b6f0c4b | 1928 | static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1929 | { |
ddeee0b2 | 1930 | int retval; |
1da177e4 LT |
1931 | struct async *as; |
1932 | ||
ddeee0b2 | 1933 | as = async_getcompleted(ps); |
ddeee0b2 | 1934 | if (as) { |
2f964780 | 1935 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
ddeee0b2 LT |
1936 | retval = processcompl(as, (void __user * __user *)arg); |
1937 | free_async(as); | |
3f2cee73 AS |
1938 | } else { |
1939 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
1940 | } |
1941 | return retval; | |
1da177e4 LT |
1942 | } |
1943 | ||
1944 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 1945 | static int proc_control_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1946 | struct usbdevfs_ctrltransfer32 __user *p32) |
1947 | { | |
5b32c385 MB |
1948 | struct usbdevfs_ctrltransfer __user *p; |
1949 | __u32 udata; | |
1950 | p = compat_alloc_user_space(sizeof(*p)); | |
1951 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1952 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1953 | put_user(compat_ptr(udata), &p->data)) |
1954 | return -EFAULT; | |
5b32c385 | 1955 | return proc_control(ps, p); |
637e8a60 AB |
1956 | } |
1957 | ||
9b6f0c4b | 1958 | static int proc_bulk_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1959 | struct usbdevfs_bulktransfer32 __user *p32) |
1960 | { | |
06793f2d MB |
1961 | struct usbdevfs_bulktransfer __user *p; |
1962 | compat_uint_t n; | |
1963 | compat_caddr_t addr; | |
637e8a60 | 1964 | |
06793f2d | 1965 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1966 | |
06793f2d MB |
1967 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1968 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1969 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1970 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1971 | return -EFAULT; | |
637e8a60 | 1972 | |
06793f2d | 1973 | return proc_bulk(ps, p); |
637e8a60 | 1974 | } |
9b6f0c4b | 1975 | static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg) |
637e8a60 AB |
1976 | { |
1977 | struct usbdevfs_disconnectsignal32 ds; | |
1978 | ||
1979 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1980 | return -EFAULT; | |
1981 | ps->discsignr = ds.signr; | |
1982 | ps->disccontext = compat_ptr(ds.context); | |
1983 | return 0; | |
1984 | } | |
1da177e4 LT |
1985 | |
1986 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1987 | struct usbdevfs_urb32 __user *uurb) | |
1988 | { | |
cc1a7c4b AV |
1989 | struct usbdevfs_urb32 urb32; |
1990 | if (copy_from_user(&urb32, uurb, sizeof(*uurb))) | |
1da177e4 | 1991 | return -EFAULT; |
cc1a7c4b AV |
1992 | kurb->type = urb32.type; |
1993 | kurb->endpoint = urb32.endpoint; | |
1994 | kurb->status = urb32.status; | |
1995 | kurb->flags = urb32.flags; | |
1996 | kurb->buffer = compat_ptr(urb32.buffer); | |
1997 | kurb->buffer_length = urb32.buffer_length; | |
1998 | kurb->actual_length = urb32.actual_length; | |
1999 | kurb->start_frame = urb32.start_frame; | |
2000 | kurb->number_of_packets = urb32.number_of_packets; | |
2001 | kurb->error_count = urb32.error_count; | |
2002 | kurb->signr = urb32.signr; | |
2003 | kurb->usercontext = compat_ptr(urb32.usercontext); | |
1da177e4 LT |
2004 | return 0; |
2005 | } | |
2006 | ||
9b6f0c4b | 2007 | static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2008 | { |
2009 | struct usbdevfs_urb uurb; | |
2010 | ||
04e482ff | 2011 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
2012 | return -EFAULT; |
2013 | ||
04e482ff GKH |
2014 | return proc_do_submiturb(ps, &uurb, |
2015 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
2016 | arg); | |
1da177e4 LT |
2017 | } |
2018 | ||
2019 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
2020 | { | |
2021 | struct urb *urb = as->urb; | |
2022 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
2023 | void __user *addr = as->userurb; | |
2024 | unsigned int i; | |
2025 | ||
2ef47001 | 2026 | compute_isochronous_actual_length(urb); |
2102e06a | 2027 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 2028 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 2029 | return -EFAULT; |
2102e06a | 2030 | } |
e015268d | 2031 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
2032 | return -EFAULT; |
2033 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
2034 | return -EFAULT; | |
2035 | if (put_user(urb->error_count, &userurb->error_count)) | |
2036 | return -EFAULT; | |
2037 | ||
93cf9b90 | 2038 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
2039 | for (i = 0; i < urb->number_of_packets; i++) { |
2040 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
2041 | &userurb->iso_frame_desc[i].actual_length)) | |
2042 | return -EFAULT; | |
2043 | if (put_user(urb->iso_frame_desc[i].status, | |
2044 | &userurb->iso_frame_desc[i].status)) | |
2045 | return -EFAULT; | |
2046 | } | |
1da177e4 LT |
2047 | } |
2048 | ||
c714de5d | 2049 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
2050 | return -EFAULT; |
2051 | return 0; | |
2052 | } | |
2053 | ||
9b6f0c4b | 2054 | static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2055 | { |
2056 | struct async *as = reap_as(ps); | |
a016a816 | 2057 | |
ddeee0b2 | 2058 | if (as) { |
a016a816 AS |
2059 | int retval; |
2060 | ||
2f964780 | 2061 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
a016a816 | 2062 | retval = processcompl_compat(as, (void __user * __user *)arg); |
ddeee0b2 LT |
2063 | free_async(as); |
2064 | return retval; | |
2065 | } | |
1da177e4 LT |
2066 | if (signal_pending(current)) |
2067 | return -EINTR; | |
3f2cee73 | 2068 | return -ENODEV; |
1da177e4 LT |
2069 | } |
2070 | ||
9b6f0c4b | 2071 | static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 2072 | { |
ddeee0b2 | 2073 | int retval; |
1da177e4 LT |
2074 | struct async *as; |
2075 | ||
ddeee0b2 LT |
2076 | as = async_getcompleted(ps); |
2077 | if (as) { | |
2f964780 | 2078 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
ddeee0b2 LT |
2079 | retval = processcompl_compat(as, (void __user * __user *)arg); |
2080 | free_async(as); | |
3f2cee73 AS |
2081 | } else { |
2082 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
2083 | } |
2084 | return retval; | |
1da177e4 LT |
2085 | } |
2086 | ||
637e8a60 | 2087 | |
1da177e4 LT |
2088 | #endif |
2089 | ||
9b6f0c4b | 2090 | static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2091 | { |
2092 | struct usbdevfs_disconnectsignal ds; | |
2093 | ||
2094 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
2095 | return -EFAULT; | |
1da177e4 LT |
2096 | ps->discsignr = ds.signr; |
2097 | ps->disccontext = ds.context; | |
2098 | return 0; | |
2099 | } | |
2100 | ||
9b6f0c4b | 2101 | static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2102 | { |
2103 | unsigned int ifnum; | |
2104 | ||
2105 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2106 | return -EFAULT; | |
2107 | return claimintf(ps, ifnum); | |
2108 | } | |
2109 | ||
9b6f0c4b | 2110 | static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2111 | { |
2112 | unsigned int ifnum; | |
2113 | int ret; | |
2114 | ||
2115 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2116 | return -EFAULT; | |
135551ea KB |
2117 | ret = releaseintf(ps, ifnum); |
2118 | if (ret < 0) | |
1da177e4 | 2119 | return ret; |
64f10edf | 2120 | destroy_async_on_interface(ps, ifnum); |
1da177e4 LT |
2121 | return 0; |
2122 | } | |
2123 | ||
9b6f0c4b | 2124 | static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 2125 | { |
1da177e4 LT |
2126 | int size; |
2127 | void *buf = NULL; | |
2128 | int retval = 0; | |
2129 | struct usb_interface *intf = NULL; | |
2130 | struct usb_driver *driver = NULL; | |
1da177e4 | 2131 | |
d883f52e RG |
2132 | if (ps->privileges_dropped) |
2133 | return -EACCES; | |
2134 | ||
c36fc889 | 2135 | /* alloc buffer */ |
135551ea KB |
2136 | size = _IOC_SIZE(ctl->ioctl_code); |
2137 | if (size > 0) { | |
4baf0df7 Tİ |
2138 | buf = kmalloc(size, GFP_KERNEL); |
2139 | if (buf == NULL) | |
1da177e4 | 2140 | return -ENOMEM; |
c36fc889 | 2141 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 2142 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 2143 | kfree(buf); |
1da177e4 LT |
2144 | return -EFAULT; |
2145 | } | |
2146 | } else { | |
04e482ff | 2147 | memset(buf, 0, size); |
1da177e4 LT |
2148 | } |
2149 | } | |
2150 | ||
349710c3 | 2151 | if (!connected(ps)) { |
6fd19f4b | 2152 | kfree(buf); |
1da177e4 LT |
2153 | return -ENODEV; |
2154 | } | |
2155 | ||
2156 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
2157 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
2158 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
2159 | retval = -EINVAL; | |
c36fc889 | 2160 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
2161 | |
2162 | /* disconnect kernel driver from interface */ | |
2163 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
2164 | if (intf->dev.driver) { |
2165 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 2166 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
2167 | usb_driver_release_interface(driver, intf); |
2168 | } else | |
2169 | retval = -ENODATA; | |
1da177e4 LT |
2170 | break; |
2171 | ||
2172 | /* let kernel drivers try to (re)bind to the interface */ | |
2173 | case USBDEVFS_CONNECT: | |
885e9747 AS |
2174 | if (!intf->dev.driver) |
2175 | retval = device_attach(&intf->dev); | |
2176 | else | |
2177 | retval = -EBUSY; | |
1da177e4 LT |
2178 | break; |
2179 | ||
2180 | /* talk directly to the interface's driver */ | |
2181 | default: | |
1da177e4 LT |
2182 | if (intf->dev.driver) |
2183 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 2184 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
2185 | retval = -ENOTTY; |
2186 | } else { | |
c532b29a | 2187 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
2188 | if (retval == -ENOIOCTLCMD) |
2189 | retval = -ENOTTY; | |
2190 | } | |
1da177e4 LT |
2191 | } |
2192 | ||
2193 | /* cleanup and return */ | |
2194 | if (retval >= 0 | |
04e482ff | 2195 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 2196 | && size > 0 |
04e482ff | 2197 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 2198 | retval = -EFAULT; |
6fd19f4b JJ |
2199 | |
2200 | kfree(buf); | |
1da177e4 LT |
2201 | return retval; |
2202 | } | |
2203 | ||
9b6f0c4b | 2204 | static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) |
c36fc889 PZ |
2205 | { |
2206 | struct usbdevfs_ioctl ctrl; | |
2207 | ||
04e482ff | 2208 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
2209 | return -EFAULT; |
2210 | return proc_ioctl(ps, &ctrl); | |
2211 | } | |
2212 | ||
2213 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 2214 | static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg) |
c36fc889 | 2215 | { |
cc1a7c4b | 2216 | struct usbdevfs_ioctl32 ioc32; |
c36fc889 | 2217 | struct usbdevfs_ioctl ctrl; |
c36fc889 | 2218 | |
cc1a7c4b | 2219 | if (copy_from_user(&ioc32, compat_ptr(arg), sizeof(ioc32))) |
c36fc889 | 2220 | return -EFAULT; |
cc1a7c4b AV |
2221 | ctrl.ifno = ioc32.ifno; |
2222 | ctrl.ioctl_code = ioc32.ioctl_code; | |
2223 | ctrl.data = compat_ptr(ioc32.data); | |
c36fc889 PZ |
2224 | return proc_ioctl(ps, &ctrl); |
2225 | } | |
2226 | #endif | |
2227 | ||
9b6f0c4b | 2228 | static int proc_claim_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2229 | { |
2230 | unsigned portnum; | |
2231 | int rc; | |
2232 | ||
2233 | if (get_user(portnum, (unsigned __user *) arg)) | |
2234 | return -EFAULT; | |
2235 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
2236 | if (rc == 0) | |
2237 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
2238 | portnum, task_pid_nr(current), current->comm); | |
2239 | return rc; | |
2240 | } | |
2241 | ||
9b6f0c4b | 2242 | static int proc_release_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2243 | { |
2244 | unsigned portnum; | |
2245 | ||
2246 | if (get_user(portnum, (unsigned __user *) arg)) | |
2247 | return -EFAULT; | |
2248 | return usb_hub_release_port(ps->dev, portnum, ps); | |
2249 | } | |
2250 | ||
9b6f0c4b | 2251 | static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg) |
19181bc5 HG |
2252 | { |
2253 | __u32 caps; | |
2254 | ||
3f2cee73 | 2255 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM | |
d883f52e RG |
2256 | USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP | |
2257 | USBDEVFS_CAP_DROP_PRIVILEGES; | |
19181bc5 HG |
2258 | if (!ps->dev->bus->no_stop_on_short) |
2259 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
2260 | if (ps->dev->bus->sg_tablesize) |
2261 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
2262 | |
2263 | if (put_user(caps, (__u32 __user *)arg)) | |
2264 | return -EFAULT; | |
2265 | ||
2266 | return 0; | |
2267 | } | |
2268 | ||
9b6f0c4b | 2269 | static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg) |
0837e7e5 HG |
2270 | { |
2271 | struct usbdevfs_disconnect_claim dc; | |
2272 | struct usb_interface *intf; | |
2273 | ||
2274 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
2275 | return -EFAULT; | |
2276 | ||
2277 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
2278 | if (!intf) | |
2279 | return -EINVAL; | |
2280 | ||
2281 | if (intf->dev.driver) { | |
2282 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
2283 | ||
d883f52e RG |
2284 | if (ps->privileges_dropped) |
2285 | return -EACCES; | |
2286 | ||
0837e7e5 HG |
2287 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && |
2288 | strncmp(dc.driver, intf->dev.driver->name, | |
2289 | sizeof(dc.driver)) != 0) | |
2290 | return -EBUSY; | |
2291 | ||
2292 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
2293 | strncmp(dc.driver, intf->dev.driver->name, | |
2294 | sizeof(dc.driver)) == 0) | |
2295 | return -EBUSY; | |
2296 | ||
2297 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
2298 | usb_driver_release_interface(driver, intf); | |
2299 | } | |
2300 | ||
2301 | return claimintf(ps, dc.interface); | |
2302 | } | |
2303 | ||
3e75c6de | 2304 | static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2305 | { |
2306 | unsigned num_streams, num_eps; | |
2307 | struct usb_host_endpoint **eps; | |
2308 | struct usb_interface *intf; | |
2309 | int r; | |
2310 | ||
2311 | r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps, | |
2312 | &eps, &intf); | |
2313 | if (r) | |
2314 | return r; | |
2315 | ||
2316 | destroy_async_on_interface(ps, | |
2317 | intf->altsetting[0].desc.bInterfaceNumber); | |
2318 | ||
2319 | r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL); | |
2320 | kfree(eps); | |
2321 | return r; | |
2322 | } | |
2323 | ||
3e75c6de | 2324 | static int proc_free_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2325 | { |
2326 | unsigned num_eps; | |
2327 | struct usb_host_endpoint **eps; | |
2328 | struct usb_interface *intf; | |
2329 | int r; | |
2330 | ||
2331 | r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf); | |
2332 | if (r) | |
2333 | return r; | |
2334 | ||
2335 | destroy_async_on_interface(ps, | |
2336 | intf->altsetting[0].desc.bInterfaceNumber); | |
2337 | ||
2338 | r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL); | |
2339 | kfree(eps); | |
2340 | return r; | |
2341 | } | |
2342 | ||
d883f52e RG |
2343 | static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg) |
2344 | { | |
2345 | u32 data; | |
2346 | ||
2347 | if (copy_from_user(&data, arg, sizeof(data))) | |
2348 | return -EFAULT; | |
2349 | ||
0f5e1558 | 2350 | /* This is a one way operation. Once privileges are |
d883f52e RG |
2351 | * dropped, you cannot regain them. You may however reissue |
2352 | * this ioctl to shrink the allowed interfaces mask. | |
2353 | */ | |
2354 | ps->interface_allowed_mask &= data; | |
2355 | ps->privileges_dropped = true; | |
2356 | ||
2357 | return 0; | |
2358 | } | |
2359 | ||
1da177e4 LT |
2360 | /* |
2361 | * NOTE: All requests here that have interface numbers as parameters | |
2362 | * are assuming that somehow the configuration has been prevented from | |
2363 | * changing. But there's no mechanism to ensure that... | |
2364 | */ | |
637e8a60 AB |
2365 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
2366 | void __user *p) | |
1da177e4 | 2367 | { |
9b6f0c4b | 2368 | struct usb_dev_state *ps = file->private_data; |
496ad9aa | 2369 | struct inode *inode = file_inode(file); |
1da177e4 | 2370 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
2371 | int ret = -ENOTTY; |
2372 | ||
2373 | if (!(file->f_mode & FMODE_WRITE)) | |
2374 | return -EPERM; | |
01412a21 | 2375 | |
1da177e4 | 2376 | usb_lock_device(dev); |
3f2cee73 AS |
2377 | |
2378 | /* Reap operations are allowed even after disconnection */ | |
2379 | switch (cmd) { | |
2380 | case USBDEVFS_REAPURB: | |
2381 | snoop(&dev->dev, "%s: REAPURB\n", __func__); | |
2382 | ret = proc_reapurb(ps, p); | |
2383 | goto done; | |
2384 | ||
2385 | case USBDEVFS_REAPURBNDELAY: | |
2386 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); | |
2387 | ret = proc_reapurbnonblock(ps, p); | |
2388 | goto done; | |
2389 | ||
2390 | #ifdef CONFIG_COMPAT | |
2391 | case USBDEVFS_REAPURB32: | |
2392 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); | |
2393 | ret = proc_reapurb_compat(ps, p); | |
2394 | goto done; | |
2395 | ||
2396 | case USBDEVFS_REAPURBNDELAY32: | |
2397 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); | |
2398 | ret = proc_reapurbnonblock_compat(ps, p); | |
2399 | goto done; | |
2400 | #endif | |
2401 | } | |
2402 | ||
349710c3 | 2403 | if (!connected(ps)) { |
1da177e4 LT |
2404 | usb_unlock_device(dev); |
2405 | return -ENODEV; | |
2406 | } | |
2407 | ||
2408 | switch (cmd) { | |
2409 | case USBDEVFS_CONTROL: | |
441b62c1 | 2410 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
2411 | ret = proc_control(ps, p); |
2412 | if (ret >= 0) | |
078cd827 | 2413 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2414 | break; |
2415 | ||
2416 | case USBDEVFS_BULK: | |
441b62c1 | 2417 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
2418 | ret = proc_bulk(ps, p); |
2419 | if (ret >= 0) | |
078cd827 | 2420 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2421 | break; |
2422 | ||
2423 | case USBDEVFS_RESETEP: | |
441b62c1 | 2424 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2425 | ret = proc_resetep(ps, p); |
2426 | if (ret >= 0) | |
078cd827 | 2427 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2428 | break; |
2429 | ||
2430 | case USBDEVFS_RESET: | |
441b62c1 | 2431 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2432 | ret = proc_resetdevice(ps); |
2433 | break; | |
2434 | ||
2435 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2436 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2437 | ret = proc_clearhalt(ps, p); |
2438 | if (ret >= 0) | |
078cd827 | 2439 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2440 | break; |
2441 | ||
2442 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2443 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2444 | ret = proc_getdriver(ps, p); |
2445 | break; | |
2446 | ||
2447 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2448 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2449 | ret = proc_connectinfo(ps, p); |
2450 | break; | |
2451 | ||
2452 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2453 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2454 | ret = proc_setintf(ps, p); |
2455 | break; | |
2456 | ||
2457 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2458 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2459 | ret = proc_setconfig(ps, p); |
2460 | break; | |
2461 | ||
2462 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2463 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2464 | ret = proc_submiturb(ps, p); |
2465 | if (ret >= 0) | |
078cd827 | 2466 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2467 | break; |
2468 | ||
2469 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2470 | case USBDEVFS_CONTROL32: |
2471 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2472 | ret = proc_control_compat(ps, p); | |
2473 | if (ret >= 0) | |
078cd827 | 2474 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2475 | break; |
2476 | ||
2477 | case USBDEVFS_BULK32: | |
2478 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2479 | ret = proc_bulk_compat(ps, p); | |
2480 | if (ret >= 0) | |
078cd827 | 2481 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2482 | break; |
2483 | ||
2484 | case USBDEVFS_DISCSIGNAL32: | |
2485 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2486 | ret = proc_disconnectsignal_compat(ps, p); | |
2487 | break; | |
1da177e4 LT |
2488 | |
2489 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2490 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2491 | ret = proc_submiturb_compat(ps, p); |
2492 | if (ret >= 0) | |
078cd827 | 2493 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2494 | break; |
2495 | ||
c36fc889 | 2496 | case USBDEVFS_IOCTL32: |
637e8a60 | 2497 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2498 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2499 | break; |
1da177e4 LT |
2500 | #endif |
2501 | ||
2502 | case USBDEVFS_DISCARDURB: | |
2f964780 | 2503 | snoop(&dev->dev, "%s: DISCARDURB %pK\n", __func__, p); |
1da177e4 LT |
2504 | ret = proc_unlinkurb(ps, p); |
2505 | break; | |
2506 | ||
1da177e4 | 2507 | case USBDEVFS_DISCSIGNAL: |
441b62c1 | 2508 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2509 | ret = proc_disconnectsignal(ps, p); |
2510 | break; | |
2511 | ||
2512 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2513 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2514 | ret = proc_claiminterface(ps, p); |
2515 | break; | |
2516 | ||
2517 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2518 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2519 | ret = proc_releaseinterface(ps, p); |
2520 | break; | |
2521 | ||
2522 | case USBDEVFS_IOCTL: | |
441b62c1 | 2523 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2524 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2525 | break; |
7cbe5dca AS |
2526 | |
2527 | case USBDEVFS_CLAIM_PORT: | |
2528 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2529 | ret = proc_claim_port(ps, p); | |
2530 | break; | |
2531 | ||
2532 | case USBDEVFS_RELEASE_PORT: | |
2533 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2534 | ret = proc_release_port(ps, p); | |
2535 | break; | |
19181bc5 HG |
2536 | case USBDEVFS_GET_CAPABILITIES: |
2537 | ret = proc_get_capabilities(ps, p); | |
2538 | break; | |
0837e7e5 HG |
2539 | case USBDEVFS_DISCONNECT_CLAIM: |
2540 | ret = proc_disconnect_claim(ps, p); | |
2541 | break; | |
bcf7f6e3 HG |
2542 | case USBDEVFS_ALLOC_STREAMS: |
2543 | ret = proc_alloc_streams(ps, p); | |
2544 | break; | |
2545 | case USBDEVFS_FREE_STREAMS: | |
2546 | ret = proc_free_streams(ps, p); | |
2547 | break; | |
d883f52e RG |
2548 | case USBDEVFS_DROP_PRIVILEGES: |
2549 | ret = proc_drop_privileges(ps, p); | |
2550 | break; | |
c01b244a AS |
2551 | case USBDEVFS_GET_SPEED: |
2552 | ret = ps->dev->speed; | |
2553 | break; | |
1da177e4 | 2554 | } |
3f2cee73 AS |
2555 | |
2556 | done: | |
1da177e4 LT |
2557 | usb_unlock_device(dev); |
2558 | if (ret >= 0) | |
078cd827 | 2559 | inode->i_atime = current_time(inode); |
1da177e4 LT |
2560 | return ret; |
2561 | } | |
2562 | ||
637e8a60 AB |
2563 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2564 | unsigned long arg) | |
2565 | { | |
2566 | int ret; | |
2567 | ||
637e8a60 | 2568 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2569 | |
2570 | return ret; | |
2571 | } | |
2572 | ||
2573 | #ifdef CONFIG_COMPAT | |
2574 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2575 | unsigned long arg) | |
2576 | { | |
2577 | int ret; | |
2578 | ||
637e8a60 | 2579 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2580 | |
2581 | return ret; | |
2582 | } | |
2583 | #endif | |
2584 | ||
1da177e4 | 2585 | /* No kernel lock - fine */ |
afc9a42b | 2586 | static __poll_t usbdev_poll(struct file *file, |
04e482ff | 2587 | struct poll_table_struct *wait) |
1da177e4 | 2588 | { |
9b6f0c4b | 2589 | struct usb_dev_state *ps = file->private_data; |
afc9a42b | 2590 | __poll_t mask = 0; |
1da177e4 LT |
2591 | |
2592 | poll_wait(file, &ps->wait, wait); | |
2593 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
a9a08845 | 2594 | mask |= EPOLLOUT | EPOLLWRNORM; |
349710c3 | 2595 | if (!connected(ps)) |
a9a08845 | 2596 | mask |= EPOLLHUP; |
5cce4382 | 2597 | if (list_empty(&ps->list)) |
a9a08845 | 2598 | mask |= EPOLLERR; |
1da177e4 LT |
2599 | return mask; |
2600 | } | |
2601 | ||
9f8b17e6 | 2602 | const struct file_operations usbdev_file_operations = { |
637e8a60 | 2603 | .owner = THIS_MODULE, |
b25472f9 | 2604 | .llseek = no_seek_end_llseek, |
637e8a60 AB |
2605 | .read = usbdev_read, |
2606 | .poll = usbdev_poll, | |
2607 | .unlocked_ioctl = usbdev_ioctl, | |
2608 | #ifdef CONFIG_COMPAT | |
2609 | .compat_ioctl = usbdev_compat_ioctl, | |
2610 | #endif | |
f7d34b44 | 2611 | .mmap = usbdev_mmap, |
637e8a60 AB |
2612 | .open = usbdev_open, |
2613 | .release = usbdev_release, | |
1da177e4 | 2614 | }; |
fbf82fd2 | 2615 | |
501950d8 | 2616 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 | 2617 | { |
9b6f0c4b | 2618 | struct usb_dev_state *ps; |
ae7795bc | 2619 | struct kernel_siginfo sinfo; |
cd9f0375 AS |
2620 | |
2621 | while (!list_empty(&udev->filelist)) { | |
9b6f0c4b | 2622 | ps = list_entry(udev->filelist.next, struct usb_dev_state, list); |
cd9f0375 AS |
2623 | destroy_all_async(ps); |
2624 | wake_up_all(&ps->wait); | |
2625 | list_del_init(&ps->list); | |
2626 | if (ps->discsignr) { | |
3b10db2b | 2627 | clear_siginfo(&sinfo); |
cd9f0375 AS |
2628 | sinfo.si_signo = ps->discsignr; |
2629 | sinfo.si_errno = EPIPE; | |
2630 | sinfo.si_code = SI_ASYNCIO; | |
2631 | sinfo.si_addr = ps->disccontext; | |
d178bc3a | 2632 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
6b4f3d01 | 2633 | ps->disc_pid, ps->cred); |
cd9f0375 AS |
2634 | } |
2635 | } | |
2636 | } | |
2637 | ||
501950d8 | 2638 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2639 | unsigned long action, void *dev) |
a7b986b3 GKH |
2640 | { |
2641 | switch (action) { | |
2642 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2643 | break; |
2644 | case USB_DEVICE_REMOVE: | |
501950d8 | 2645 | usbdev_remove(dev); |
a7b986b3 GKH |
2646 | break; |
2647 | } | |
2648 | return NOTIFY_OK; | |
2649 | } | |
2650 | ||
2651 | static struct notifier_block usbdev_nb = { | |
00fe52de | 2652 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2653 | }; |
2654 | ||
7e7654a9 | 2655 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2656 | |
9f8b17e6 | 2657 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2658 | { |
2659 | int retval; | |
2660 | ||
fad21bdf | 2661 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2662 | "usb_device"); |
fbf82fd2 | 2663 | if (retval) { |
69a85942 | 2664 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2665 | goto out; |
2666 | } | |
9f8b17e6 | 2667 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2668 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2669 | if (retval) { |
69a85942 GKH |
2670 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2671 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2672 | goto error_cdev; |
fbf82fd2 | 2673 | } |
501950d8 | 2674 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2675 | out: |
2676 | return retval; | |
a7b986b3 | 2677 | |
a7b986b3 GKH |
2678 | error_cdev: |
2679 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2680 | goto out; | |
fbf82fd2 KS |
2681 | } |
2682 | ||
9f8b17e6 | 2683 | void usb_devio_cleanup(void) |
fbf82fd2 | 2684 | { |
a7b986b3 | 2685 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2686 | cdev_del(&usb_device_cdev); |
fad21bdf | 2687 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2688 | } |