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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / media / video / v4l2-compat-ioctl32.c
blobaf4419e6c65855eca787bd4a61777f33cf5b0c7f
1 /*
2 * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
3 * Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
4 *
5 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
6 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
8 * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz)
9 * Copyright (C) 2005 Philippe De Muyter (phdm@macqel.be)
10 * Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
11 *
12 * These routines maintain argument size conversion between 32bit and 64bit
13 * ioctls.
14 */
15
16 #include <linux/compat.h>
17 #include <linux/videodev2.h>
18 #include <linux/module.h>
19 #include <media/v4l2-ioctl.h>
20
21 #ifdef CONFIG_COMPAT
22
23 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
24 {
25 long ret = -ENOIOCTLCMD;
26
27 if (file->f_op->unlocked_ioctl)
28 ret = file->f_op->unlocked_ioctl(file, cmd, arg);
29
30 return ret;
31 }
32
33
34 struct v4l2_clip32 {
35 struct v4l2_rect c;
36 compat_caddr_t next;
37 };
38
39 struct v4l2_window32 {
40 struct v4l2_rect w;
41 enum v4l2_field field;
42 __u32 chromakey;
43 compat_caddr_t clips; /* actually struct v4l2_clip32 * */
44 __u32 clipcount;
45 compat_caddr_t bitmap;
46 };
47
48 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
49 {
50 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
51 copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
52 get_user(kp->field, &up->field) ||
53 get_user(kp->chromakey, &up->chromakey) ||
54 get_user(kp->clipcount, &up->clipcount))
55 return -EFAULT;
56 if (kp->clipcount > 2048)
57 return -EINVAL;
58 if (kp->clipcount) {
59 struct v4l2_clip32 __user *uclips;
60 struct v4l2_clip __user *kclips;
61 int n = kp->clipcount;
62 compat_caddr_t p;
63
64 if (get_user(p, &up->clips))
65 return -EFAULT;
66 uclips = compat_ptr(p);
67 kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
68 kp->clips = kclips;
69 while (--n >= 0) {
70 if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
71 return -EFAULT;
72 if (put_user(n ? kclips + 1 : NULL, &kclips->next))
73 return -EFAULT;
74 uclips += 1;
75 kclips += 1;
76 }
77 } else
78 kp->clips = NULL;
79 return 0;
80 }
81
82 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
83 {
84 if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
85 put_user(kp->field, &up->field) ||
86 put_user(kp->chromakey, &up->chromakey) ||
87 put_user(kp->clipcount, &up->clipcount))
88 return -EFAULT;
89 return 0;
90 }
91
92 static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
93 {
94 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
95 return -EFAULT;
96 return 0;
97 }
98
99 static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
100 struct v4l2_pix_format_mplane __user *up)
101 {
102 if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
103 return -EFAULT;
104 return 0;
105 }
106
107 static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
108 {
109 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
110 return -EFAULT;
111 return 0;
112 }
113
114 static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
115 struct v4l2_pix_format_mplane __user *up)
116 {
117 if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
118 return -EFAULT;
119 return 0;
120 }
121
122 static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
123 {
124 if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
125 return -EFAULT;
126 return 0;
127 }
128
129 static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
130 {
131 if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
132 return -EFAULT;
133 return 0;
134 }
135
136 static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
137 {
138 if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
139 return -EFAULT;
140 return 0;
141 }
142
143 static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
144 {
145 if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
146 return -EFAULT;
147 return 0;
148 }
149
150 struct v4l2_format32 {
151 enum v4l2_buf_type type;
152 union {
153 struct v4l2_pix_format pix;
154 struct v4l2_pix_format_mplane pix_mp;
155 struct v4l2_window32 win;
156 struct v4l2_vbi_format vbi;
157 struct v4l2_sliced_vbi_format sliced;
158 __u8 raw_data[200]; /* user-defined */
159 } fmt;
160 };
161
162 /**
163 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
164 * @index: on return, index of the first created buffer
165 * @count: entry: number of requested buffers,
166 * return: number of created buffers
167 * @memory: buffer memory type
168 * @format: frame format, for which buffers are requested
169 * @reserved: future extensions
170 */
171 struct v4l2_create_buffers32 {
172 __u32 index;
173 __u32 count;
174 enum v4l2_memory memory;
175 struct v4l2_format32 format;
176 __u32 reserved[8];
177 };
178
179 static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
180 {
181 switch (kp->type) {
182 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
183 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
184 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
185 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
186 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
187 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
188 &up->fmt.pix_mp);
189 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
190 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
191 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
192 case V4L2_BUF_TYPE_VBI_CAPTURE:
193 case V4L2_BUF_TYPE_VBI_OUTPUT:
194 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
195 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
196 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
197 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
198 case V4L2_BUF_TYPE_PRIVATE:
199 if (copy_from_user(kp, up, sizeof(kp->fmt.raw_data)))
200 return -EFAULT;
201 return 0;
202 default:
203 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
204 kp->type);
205 return -EINVAL;
206 }
207 }
208
209 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
210 {
211 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)) ||
212 get_user(kp->type, &up->type))
213 return -EFAULT;
214 return __get_v4l2_format32(kp, up);
215 }
216
217 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
218 {
219 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
220 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format.fmt)))
221 return -EFAULT;
222 return __get_v4l2_format32(&kp->format, &up->format);
223 }
224
225 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
226 {
227 switch (kp->type) {
228 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
229 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
230 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
231 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
232 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
233 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
234 &up->fmt.pix_mp);
235 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
236 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
237 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
238 case V4L2_BUF_TYPE_VBI_CAPTURE:
239 case V4L2_BUF_TYPE_VBI_OUTPUT:
240 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
241 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
242 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
243 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
244 case V4L2_BUF_TYPE_PRIVATE:
245 if (copy_to_user(up, kp, sizeof(up->fmt.raw_data)))
246 return -EFAULT;
247 return 0;
248 default:
249 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
250 kp->type);
251 return -EINVAL;
252 }
253 }
254
255 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
256 {
257 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
258 put_user(kp->type, &up->type))
259 return -EFAULT;
260 return __put_v4l2_format32(kp, up);
261 }
262
263 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
264 {
265 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
266 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
267 return -EFAULT;
268 return __put_v4l2_format32(&kp->format, &up->format);
269 }
270
271 struct v4l2_standard32 {
272 __u32 index;
273 __u32 id[2]; /* __u64 would get the alignment wrong */
274 __u8 name[24];
275 struct v4l2_fract frameperiod; /* Frames, not fields */
276 __u32 framelines;
277 __u32 reserved[4];
278 };
279
280 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
281 {
282 /* other fields are not set by the user, nor used by the driver */
283 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
284 get_user(kp->index, &up->index))
285 return -EFAULT;
286 return 0;
287 }
288
289 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
290 {
291 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
292 put_user(kp->index, &up->index) ||
293 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
294 copy_to_user(up->name, kp->name, 24) ||
295 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
296 put_user(kp->framelines, &up->framelines) ||
297 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
298 return -EFAULT;
299 return 0;
300 }
301
302 struct v4l2_plane32 {
303 __u32 bytesused;
304 __u32 length;
305 union {
306 __u32 mem_offset;
307 compat_long_t userptr;
308 } m;
309 __u32 data_offset;
310 __u32 reserved[11];
311 };
312
313 struct v4l2_buffer32 {
314 __u32 index;
315 enum v4l2_buf_type type;
316 __u32 bytesused;
317 __u32 flags;
318 enum v4l2_field field;
319 struct compat_timeval timestamp;
320 struct v4l2_timecode timecode;
321 __u32 sequence;
322
323 /* memory location */
324 enum v4l2_memory memory;
325 union {
326 __u32 offset;
327 compat_long_t userptr;
328 compat_caddr_t planes;
329 } m;
330 __u32 length;
331 __u32 input;
332 __u32 reserved;
333 };
334
335 static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
336 enum v4l2_memory memory)
337 {
338 void __user *up_pln;
339 compat_long_t p;
340
341 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
342 copy_in_user(&up->data_offset, &up32->data_offset,
343 sizeof(__u32)))
344 return -EFAULT;
345
346 if (memory == V4L2_MEMORY_USERPTR) {
347 if (get_user(p, &up32->m.userptr))
348 return -EFAULT;
349 up_pln = compat_ptr(p);
350 if (put_user((unsigned long)up_pln, &up->m.userptr))
351 return -EFAULT;
352 } else {
353 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
354 sizeof(__u32)))
355 return -EFAULT;
356 }
357
358 return 0;
359 }
360
361 static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
362 enum v4l2_memory memory)
363 {
364 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
365 copy_in_user(&up32->data_offset, &up->data_offset,
366 sizeof(__u32)))
367 return -EFAULT;
368
369 /* For MMAP, driver might've set up the offset, so copy it back.
370 * USERPTR stays the same (was userspace-provided), so no copying. */
371 if (memory == V4L2_MEMORY_MMAP)
372 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
373 sizeof(__u32)))
374 return -EFAULT;
375
376 return 0;
377 }
378
379 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
380 {
381 struct v4l2_plane32 __user *uplane32;
382 struct v4l2_plane __user *uplane;
383 compat_caddr_t p;
384 int num_planes;
385 int ret;
386
387 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
388 get_user(kp->index, &up->index) ||
389 get_user(kp->type, &up->type) ||
390 get_user(kp->flags, &up->flags) ||
391 get_user(kp->memory, &up->memory) ||
392 get_user(kp->input, &up->input))
393 return -EFAULT;
394
395 if (V4L2_TYPE_IS_OUTPUT(kp->type))
396 if (get_user(kp->bytesused, &up->bytesused) ||
397 get_user(kp->field, &up->field) ||
398 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
399 get_user(kp->timestamp.tv_usec,
400 &up->timestamp.tv_usec))
401 return -EFAULT;
402
403 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
404 if (get_user(kp->length, &up->length))
405 return -EFAULT;
406
407 num_planes = kp->length;
408 if (num_planes == 0) {
409 kp->m.planes = NULL;
410 /* num_planes == 0 is legal, e.g. when userspace doesn't
411 * need planes array on DQBUF*/
412 return 0;
413 }
414
415 if (get_user(p, &up->m.planes))
416 return -EFAULT;
417
418 uplane32 = compat_ptr(p);
419 if (!access_ok(VERIFY_READ, uplane32,
420 num_planes * sizeof(struct v4l2_plane32)))
421 return -EFAULT;
422
423 /* We don't really care if userspace decides to kill itself
424 * by passing a very big num_planes value */
425 uplane = compat_alloc_user_space(num_planes *
426 sizeof(struct v4l2_plane));
427 kp->m.planes = uplane;
428
429 while (--num_planes >= 0) {
430 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
431 if (ret)
432 return ret;
433 ++uplane;
434 ++uplane32;
435 }
436 } else {
437 switch (kp->memory) {
438 case V4L2_MEMORY_MMAP:
439 if (get_user(kp->length, &up->length) ||
440 get_user(kp->m.offset, &up->m.offset))
441 return -EFAULT;
442 break;
443 case V4L2_MEMORY_USERPTR:
444 {
445 compat_long_t tmp;
446
447 if (get_user(kp->length, &up->length) ||
448 get_user(tmp, &up->m.userptr))
449 return -EFAULT;
450
451 kp->m.userptr = (unsigned long)compat_ptr(tmp);
452 }
453 break;
454 case V4L2_MEMORY_OVERLAY:
455 if (get_user(kp->m.offset, &up->m.offset))
456 return -EFAULT;
457 break;
458 }
459 }
460
461 return 0;
462 }
463
464 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
465 {
466 struct v4l2_plane32 __user *uplane32;
467 struct v4l2_plane __user *uplane;
468 compat_caddr_t p;
469 int num_planes;
470 int ret;
471
472 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
473 put_user(kp->index, &up->index) ||
474 put_user(kp->type, &up->type) ||
475 put_user(kp->flags, &up->flags) ||
476 put_user(kp->memory, &up->memory) ||
477 put_user(kp->input, &up->input))
478 return -EFAULT;
479
480 if (put_user(kp->bytesused, &up->bytesused) ||
481 put_user(kp->field, &up->field) ||
482 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
483 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
484 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
485 put_user(kp->sequence, &up->sequence) ||
486 put_user(kp->reserved, &up->reserved))
487 return -EFAULT;
488
489 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
490 num_planes = kp->length;
491 if (num_planes == 0)
492 return 0;
493
494 uplane = kp->m.planes;
495 if (get_user(p, &up->m.planes))
496 return -EFAULT;
497 uplane32 = compat_ptr(p);
498
499 while (--num_planes >= 0) {
500 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
501 if (ret)
502 return ret;
503 ++uplane;
504 ++uplane32;
505 }
506 } else {
507 switch (kp->memory) {
508 case V4L2_MEMORY_MMAP:
509 if (put_user(kp->length, &up->length) ||
510 put_user(kp->m.offset, &up->m.offset))
511 return -EFAULT;
512 break;
513 case V4L2_MEMORY_USERPTR:
514 if (put_user(kp->length, &up->length) ||
515 put_user(kp->m.userptr, &up->m.userptr))
516 return -EFAULT;
517 break;
518 case V4L2_MEMORY_OVERLAY:
519 if (put_user(kp->m.offset, &up->m.offset))
520 return -EFAULT;
521 break;
522 }
523 }
524
525 return 0;
526 }
527
528 struct v4l2_framebuffer32 {
529 __u32 capability;
530 __u32 flags;
531 compat_caddr_t base;
532 struct v4l2_pix_format fmt;
533 };
534
535 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
536 {
537 u32 tmp;
538
539 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
540 get_user(tmp, &up->base) ||
541 get_user(kp->capability, &up->capability) ||
542 get_user(kp->flags, &up->flags))
543 return -EFAULT;
544 kp->base = compat_ptr(tmp);
545 get_v4l2_pix_format(&kp->fmt, &up->fmt);
546 return 0;
547 }
548
549 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
550 {
551 u32 tmp = (u32)((unsigned long)kp->base);
552
553 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
554 put_user(tmp, &up->base) ||
555 put_user(kp->capability, &up->capability) ||
556 put_user(kp->flags, &up->flags))
557 return -EFAULT;
558 put_v4l2_pix_format(&kp->fmt, &up->fmt);
559 return 0;
560 }
561
562 struct v4l2_input32 {
563 __u32 index; /* Which input */
564 __u8 name[32]; /* Label */
565 __u32 type; /* Type of input */
566 __u32 audioset; /* Associated audios (bitfield) */
567 __u32 tuner; /* Associated tuner */
568 v4l2_std_id std;
569 __u32 status;
570 __u32 reserved[4];
571 } __attribute__ ((packed));
572
573 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
574 Otherwise it is identical to the 32-bit version. */
575 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
576 {
577 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
578 return -EFAULT;
579 return 0;
580 }
581
582 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
583 {
584 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
585 return -EFAULT;
586 return 0;
587 }
588
589 struct v4l2_ext_controls32 {
590 __u32 ctrl_class;
591 __u32 count;
592 __u32 error_idx;
593 __u32 reserved[2];
594 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
595 };
596
597 struct v4l2_ext_control32 {
598 __u32 id;
599 __u32 size;
600 __u32 reserved2[1];
601 union {
602 __s32 value;
603 __s64 value64;
604 compat_caddr_t string; /* actually char * */
605 };
606 } __attribute__ ((packed));
607
608 /* The following function really belong in v4l2-common, but that causes
609 a circular dependency between modules. We need to think about this, but
610 for now this will do. */
611
612 /* Return non-zero if this control is a pointer type. Currently only
613 type STRING is a pointer type. */
614 static inline int ctrl_is_pointer(u32 id)
615 {
616 switch (id) {
617 case V4L2_CID_RDS_TX_PS_NAME:
618 case V4L2_CID_RDS_TX_RADIO_TEXT:
619 return 1;
620 default:
621 return 0;
622 }
623 }
624
625 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
626 {
627 struct v4l2_ext_control32 __user *ucontrols;
628 struct v4l2_ext_control __user *kcontrols;
629 int n;
630 compat_caddr_t p;
631
632 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
633 get_user(kp->ctrl_class, &up->ctrl_class) ||
634 get_user(kp->count, &up->count) ||
635 get_user(kp->error_idx, &up->error_idx) ||
636 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
637 return -EFAULT;
638 n = kp->count;
639 if (n == 0) {
640 kp->controls = NULL;
641 return 0;
642 }
643 if (get_user(p, &up->controls))
644 return -EFAULT;
645 ucontrols = compat_ptr(p);
646 if (!access_ok(VERIFY_READ, ucontrols,
647 n * sizeof(struct v4l2_ext_control32)))
648 return -EFAULT;
649 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
650 kp->controls = kcontrols;
651 while (--n >= 0) {
652 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
653 return -EFAULT;
654 if (ctrl_is_pointer(kcontrols->id)) {
655 void __user *s;
656
657 if (get_user(p, &ucontrols->string))
658 return -EFAULT;
659 s = compat_ptr(p);
660 if (put_user(s, &kcontrols->string))
661 return -EFAULT;
662 }
663 ucontrols++;
664 kcontrols++;
665 }
666 return 0;
667 }
668
669 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
670 {
671 struct v4l2_ext_control32 __user *ucontrols;
672 struct v4l2_ext_control __user *kcontrols = kp->controls;
673 int n = kp->count;
674 compat_caddr_t p;
675
676 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
677 put_user(kp->ctrl_class, &up->ctrl_class) ||
678 put_user(kp->count, &up->count) ||
679 put_user(kp->error_idx, &up->error_idx) ||
680 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
681 return -EFAULT;
682 if (!kp->count)
683 return 0;
684
685 if (get_user(p, &up->controls))
686 return -EFAULT;
687 ucontrols = compat_ptr(p);
688 if (!access_ok(VERIFY_WRITE, ucontrols,
689 n * sizeof(struct v4l2_ext_control32)))
690 return -EFAULT;
691
692 while (--n >= 0) {
693 unsigned size = sizeof(*ucontrols);
694
695 /* Do not modify the pointer when copying a pointer control.
696 The contents of the pointer was changed, not the pointer
697 itself. */
698 if (ctrl_is_pointer(kcontrols->id))
699 size -= sizeof(ucontrols->value64);
700 if (copy_in_user(ucontrols, kcontrols, size))
701 return -EFAULT;
702 ucontrols++;
703 kcontrols++;
704 }
705 return 0;
706 }
707
708 struct v4l2_event32 {
709 __u32 type;
710 union {
711 __u8 data[64];
712 } u;
713 __u32 pending;
714 __u32 sequence;
715 struct compat_timespec timestamp;
716 __u32 id;
717 __u32 reserved[8];
718 };
719
720 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
721 {
722 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
723 put_user(kp->type, &up->type) ||
724 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
725 put_user(kp->pending, &up->pending) ||
726 put_user(kp->sequence, &up->sequence) ||
727 put_compat_timespec(&kp->timestamp, &up->timestamp) ||
728 put_user(kp->id, &up->id) ||
729 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
730 return -EFAULT;
731 return 0;
732 }
733
734 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
735 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
736 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
737 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
738 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
739 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
740 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
741 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
742 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
743 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
744 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
745 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
746 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
747 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
748 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
749 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
750
751 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
752 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
753 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
754 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
755 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
756 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
757 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
758
759 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
760 {
761 union {
762 struct v4l2_format v2f;
763 struct v4l2_buffer v2b;
764 struct v4l2_framebuffer v2fb;
765 struct v4l2_input v2i;
766 struct v4l2_standard v2s;
767 struct v4l2_ext_controls v2ecs;
768 struct v4l2_event v2ev;
769 struct v4l2_create_buffers v2crt;
770 unsigned long vx;
771 int vi;
772 } karg;
773 void __user *up = compat_ptr(arg);
774 int compatible_arg = 1;
775 long err = 0;
776
777 /* First, convert the command. */
778 switch (cmd) {
779 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
780 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
781 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
782 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
783 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
784 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
785 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
786 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
787 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
788 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
789 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
790 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
791 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
792 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
793 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
794 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
795 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
796 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
797 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
798 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
799 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
800 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
801 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
802 }
803
804 switch (cmd) {
805 case VIDIOC_OVERLAY:
806 case VIDIOC_STREAMON:
807 case VIDIOC_STREAMOFF:
808 case VIDIOC_S_INPUT:
809 case VIDIOC_S_OUTPUT:
810 err = get_user(karg.vi, (s32 __user *)up);
811 compatible_arg = 0;
812 break;
813
814 case VIDIOC_G_INPUT:
815 case VIDIOC_G_OUTPUT:
816 compatible_arg = 0;
817 break;
818
819 case VIDIOC_G_FMT:
820 case VIDIOC_S_FMT:
821 case VIDIOC_TRY_FMT:
822 err = get_v4l2_format32(&karg.v2f, up);
823 compatible_arg = 0;
824 break;
825
826 case VIDIOC_CREATE_BUFS:
827 err = get_v4l2_create32(&karg.v2crt, up);
828 compatible_arg = 0;
829 break;
830
831 case VIDIOC_PREPARE_BUF:
832 case VIDIOC_QUERYBUF:
833 case VIDIOC_QBUF:
834 case VIDIOC_DQBUF:
835 err = get_v4l2_buffer32(&karg.v2b, up);
836 compatible_arg = 0;
837 break;
838
839 case VIDIOC_S_FBUF:
840 err = get_v4l2_framebuffer32(&karg.v2fb, up);
841 compatible_arg = 0;
842 break;
843
844 case VIDIOC_G_FBUF:
845 compatible_arg = 0;
846 break;
847
848 case VIDIOC_ENUMSTD:
849 err = get_v4l2_standard32(&karg.v2s, up);
850 compatible_arg = 0;
851 break;
852
853 case VIDIOC_ENUMINPUT:
854 err = get_v4l2_input32(&karg.v2i, up);
855 compatible_arg = 0;
856 break;
857
858 case VIDIOC_G_EXT_CTRLS:
859 case VIDIOC_S_EXT_CTRLS:
860 case VIDIOC_TRY_EXT_CTRLS:
861 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
862 compatible_arg = 0;
863 break;
864 case VIDIOC_DQEVENT:
865 compatible_arg = 0;
866 break;
867 }
868 if (err)
869 return err;
870
871 if (compatible_arg)
872 err = native_ioctl(file, cmd, (unsigned long)up);
873 else {
874 mm_segment_t old_fs = get_fs();
875
876 set_fs(KERNEL_DS);
877 err = native_ioctl(file, cmd, (unsigned long)&karg);
878 set_fs(old_fs);
879 }
880
881 /* Special case: even after an error we need to put the
882 results back for these ioctls since the error_idx will
883 contain information on which control failed. */
884 switch (cmd) {
885 case VIDIOC_G_EXT_CTRLS:
886 case VIDIOC_S_EXT_CTRLS:
887 case VIDIOC_TRY_EXT_CTRLS:
888 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
889 err = -EFAULT;
890 break;
891 }
892 if (err)
893 return err;
894
895 switch (cmd) {
896 case VIDIOC_S_INPUT:
897 case VIDIOC_S_OUTPUT:
898 case VIDIOC_G_INPUT:
899 case VIDIOC_G_OUTPUT:
900 err = put_user(((s32)karg.vi), (s32 __user *)up);
901 break;
902
903 case VIDIOC_G_FBUF:
904 err = put_v4l2_framebuffer32(&karg.v2fb, up);
905 break;
906
907 case VIDIOC_DQEVENT:
908 err = put_v4l2_event32(&karg.v2ev, up);
909 break;
910
911 case VIDIOC_G_FMT:
912 case VIDIOC_S_FMT:
913 case VIDIOC_TRY_FMT:
914 err = put_v4l2_format32(&karg.v2f, up);
915 break;
916
917 case VIDIOC_CREATE_BUFS:
918 err = put_v4l2_create32(&karg.v2crt, up);
919 break;
920
921 case VIDIOC_QUERYBUF:
922 case VIDIOC_QBUF:
923 case VIDIOC_DQBUF:
924 err = put_v4l2_buffer32(&karg.v2b, up);
925 break;
926
927 case VIDIOC_ENUMSTD:
928 err = put_v4l2_standard32(&karg.v2s, up);
929 break;
930
931 case VIDIOC_ENUMINPUT:
932 err = put_v4l2_input32(&karg.v2i, up);
933 break;
934 }
935 return err;
936 }
937
938 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
939 {
940 long ret = -ENOIOCTLCMD;
941
942 if (!file->f_op->unlocked_ioctl)
943 return ret;
944
945 switch (cmd) {
946 case VIDIOC_QUERYCAP:
947 case VIDIOC_RESERVED:
948 case VIDIOC_ENUM_FMT:
949 case VIDIOC_G_FMT32:
950 case VIDIOC_S_FMT32:
951 case VIDIOC_REQBUFS:
952 case VIDIOC_QUERYBUF32:
953 case VIDIOC_G_FBUF32:
954 case VIDIOC_S_FBUF32:
955 case VIDIOC_OVERLAY32:
956 case VIDIOC_QBUF32:
957 case VIDIOC_DQBUF32:
958 case VIDIOC_STREAMON32:
959 case VIDIOC_STREAMOFF32:
960 case VIDIOC_G_PARM:
961 case VIDIOC_S_PARM:
962 case VIDIOC_G_STD:
963 case VIDIOC_S_STD:
964 case VIDIOC_ENUMSTD32:
965 case VIDIOC_ENUMINPUT32:
966 case VIDIOC_G_CTRL:
967 case VIDIOC_S_CTRL:
968 case VIDIOC_G_TUNER:
969 case VIDIOC_S_TUNER:
970 case VIDIOC_G_AUDIO:
971 case VIDIOC_S_AUDIO:
972 case VIDIOC_QUERYCTRL:
973 case VIDIOC_QUERYMENU:
974 case VIDIOC_G_INPUT32:
975 case VIDIOC_S_INPUT32:
976 case VIDIOC_G_OUTPUT32:
977 case VIDIOC_S_OUTPUT32:
978 case VIDIOC_ENUMOUTPUT:
979 case VIDIOC_G_AUDOUT:
980 case VIDIOC_S_AUDOUT:
981 case VIDIOC_G_MODULATOR:
982 case VIDIOC_S_MODULATOR:
983 case VIDIOC_S_FREQUENCY:
984 case VIDIOC_G_FREQUENCY:
985 case VIDIOC_CROPCAP:
986 case VIDIOC_G_CROP:
987 case VIDIOC_S_CROP:
988 case VIDIOC_G_SELECTION:
989 case VIDIOC_S_SELECTION:
990 case VIDIOC_G_JPEGCOMP:
991 case VIDIOC_S_JPEGCOMP:
992 case VIDIOC_QUERYSTD:
993 case VIDIOC_TRY_FMT32:
994 case VIDIOC_ENUMAUDIO:
995 case VIDIOC_ENUMAUDOUT:
996 case VIDIOC_G_PRIORITY:
997 case VIDIOC_S_PRIORITY:
998 case VIDIOC_G_SLICED_VBI_CAP:
999 case VIDIOC_LOG_STATUS:
1000 case VIDIOC_G_EXT_CTRLS32:
1001 case VIDIOC_S_EXT_CTRLS32:
1002 case VIDIOC_TRY_EXT_CTRLS32:
1003 case VIDIOC_ENUM_FRAMESIZES:
1004 case VIDIOC_ENUM_FRAMEINTERVALS:
1005 case VIDIOC_G_ENC_INDEX:
1006 case VIDIOC_ENCODER_CMD:
1007 case VIDIOC_TRY_ENCODER_CMD:
1008 case VIDIOC_DBG_S_REGISTER:
1009 case VIDIOC_DBG_G_REGISTER:
1010 case VIDIOC_DBG_G_CHIP_IDENT:
1011 case VIDIOC_S_HW_FREQ_SEEK:
1012 case VIDIOC_ENUM_DV_PRESETS:
1013 case VIDIOC_S_DV_PRESET:
1014 case VIDIOC_G_DV_PRESET:
1015 case VIDIOC_QUERY_DV_PRESET:
1016 case VIDIOC_S_DV_TIMINGS:
1017 case VIDIOC_G_DV_TIMINGS:
1018 case VIDIOC_DQEVENT:
1019 case VIDIOC_DQEVENT32:
1020 case VIDIOC_SUBSCRIBE_EVENT:
1021 case VIDIOC_UNSUBSCRIBE_EVENT:
1022 case VIDIOC_CREATE_BUFS32:
1023 case VIDIOC_PREPARE_BUF32:
1024 ret = do_video_ioctl(file, cmd, arg);
1025 break;
1026
1027 default:
1028 printk(KERN_WARNING "compat_ioctl32: "
1029 "unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1030 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1031 break;
1032 }
1033 return ret;
1034 }
1035 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
1036 #endif
1037
1038 MODULE_LICENSE("GPL");