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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-compat-ioctl32.c
blob019644ff627d775f7f4b67e29b46baab9dadabbf
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/module.h>
18 #include <linux/videodev2.h>
19 #include <linux/v4l2-subdev.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-ioctl.h>
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 __u32 field; /* enum v4l2_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 static inline int get_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
151 {
152 if (copy_from_user(kp, up, sizeof(struct v4l2_sdr_format)))
153 return -EFAULT;
154 return 0;
155 }
156
157 static inline int put_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
158 {
159 if (copy_to_user(up, kp, sizeof(struct v4l2_sdr_format)))
160 return -EFAULT;
161 return 0;
162 }
163
164 struct v4l2_format32 {
165 __u32 type; /* enum v4l2_buf_type */
166 union {
167 struct v4l2_pix_format pix;
168 struct v4l2_pix_format_mplane pix_mp;
169 struct v4l2_window32 win;
170 struct v4l2_vbi_format vbi;
171 struct v4l2_sliced_vbi_format sliced;
172 struct v4l2_sdr_format sdr;
173 __u8 raw_data[200]; /* user-defined */
174 } fmt;
175 };
176
177 /**
178 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
179 * @index: on return, index of the first created buffer
180 * @count: entry: number of requested buffers,
181 * return: number of created buffers
182 * @memory: buffer memory type
183 * @format: frame format, for which buffers are requested
184 * @reserved: future extensions
185 */
186 struct v4l2_create_buffers32 {
187 __u32 index;
188 __u32 count;
189 __u32 memory; /* enum v4l2_memory */
190 struct v4l2_format32 format;
191 __u32 reserved[8];
192 };
193
194 static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
195 {
196 if (get_user(kp->type, &up->type))
197 return -EFAULT;
198
199 switch (kp->type) {
200 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
201 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
202 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
203 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
205 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
206 &up->fmt.pix_mp);
207 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
208 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
209 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
210 case V4L2_BUF_TYPE_VBI_CAPTURE:
211 case V4L2_BUF_TYPE_VBI_OUTPUT:
212 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
213 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
214 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
215 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
216 case V4L2_BUF_TYPE_SDR_CAPTURE:
217 case V4L2_BUF_TYPE_SDR_OUTPUT:
218 return get_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
219 default:
220 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
221 kp->type);
222 return -EINVAL;
223 }
224 }
225
226 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
227 {
228 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)))
229 return -EFAULT;
230 return __get_v4l2_format32(kp, up);
231 }
232
233 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
234 {
235 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
236 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
237 return -EFAULT;
238 return __get_v4l2_format32(&kp->format, &up->format);
239 }
240
241 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
242 {
243 if (put_user(kp->type, &up->type))
244 return -EFAULT;
245
246 switch (kp->type) {
247 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
248 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
249 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
250 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
251 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
252 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
253 &up->fmt.pix_mp);
254 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
255 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
256 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
257 case V4L2_BUF_TYPE_VBI_CAPTURE:
258 case V4L2_BUF_TYPE_VBI_OUTPUT:
259 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
260 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
261 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
262 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
263 case V4L2_BUF_TYPE_SDR_CAPTURE:
264 case V4L2_BUF_TYPE_SDR_OUTPUT:
265 return put_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
266 default:
267 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
268 kp->type);
269 return -EINVAL;
270 }
271 }
272
273 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
274 {
275 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)))
276 return -EFAULT;
277 return __put_v4l2_format32(kp, up);
278 }
279
280 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
281 {
282 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
283 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)))
284 return -EFAULT;
285 return __put_v4l2_format32(&kp->format, &up->format);
286 }
287
288 struct v4l2_standard32 {
289 __u32 index;
290 compat_u64 id;
291 __u8 name[24];
292 struct v4l2_fract frameperiod; /* Frames, not fields */
293 __u32 framelines;
294 __u32 reserved[4];
295 };
296
297 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
298 {
299 /* other fields are not set by the user, nor used by the driver */
300 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
301 get_user(kp->index, &up->index))
302 return -EFAULT;
303 return 0;
304 }
305
306 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
307 {
308 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
309 put_user(kp->index, &up->index) ||
310 put_user(kp->id, &up->id) ||
311 copy_to_user(up->name, kp->name, 24) ||
312 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
313 put_user(kp->framelines, &up->framelines) ||
314 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
315 return -EFAULT;
316 return 0;
317 }
318
319 struct v4l2_plane32 {
320 __u32 bytesused;
321 __u32 length;
322 union {
323 __u32 mem_offset;
324 compat_long_t userptr;
325 __s32 fd;
326 } m;
327 __u32 data_offset;
328 __u32 reserved[11];
329 };
330
331 struct v4l2_buffer32 {
332 __u32 index;
333 __u32 type; /* enum v4l2_buf_type */
334 __u32 bytesused;
335 __u32 flags;
336 __u32 field; /* enum v4l2_field */
337 struct compat_timeval timestamp;
338 struct v4l2_timecode timecode;
339 __u32 sequence;
340
341 /* memory location */
342 __u32 memory; /* enum v4l2_memory */
343 union {
344 __u32 offset;
345 compat_long_t userptr;
346 compat_caddr_t planes;
347 __s32 fd;
348 } m;
349 __u32 length;
350 __u32 reserved2;
351 __u32 reserved;
352 };
353
354 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
355 enum v4l2_memory memory)
356 {
357 void __user *up_pln;
358 compat_long_t p;
359
360 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
361 copy_in_user(&up->data_offset, &up32->data_offset,
362 sizeof(__u32)))
363 return -EFAULT;
364
365 if (memory == V4L2_MEMORY_USERPTR) {
366 if (get_user(p, &up32->m.userptr))
367 return -EFAULT;
368 up_pln = compat_ptr(p);
369 if (put_user((unsigned long)up_pln, &up->m.userptr))
370 return -EFAULT;
371 } else if (memory == V4L2_MEMORY_DMABUF) {
372 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
373 return -EFAULT;
374 } else {
375 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
376 sizeof(__u32)))
377 return -EFAULT;
378 }
379
380 return 0;
381 }
382
383 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
384 enum v4l2_memory memory)
385 {
386 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
387 copy_in_user(&up32->data_offset, &up->data_offset,
388 sizeof(__u32)))
389 return -EFAULT;
390
391 /* For MMAP, driver might've set up the offset, so copy it back.
392 * USERPTR stays the same (was userspace-provided), so no copying. */
393 if (memory == V4L2_MEMORY_MMAP)
394 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
395 sizeof(__u32)))
396 return -EFAULT;
397 /* For DMABUF, driver might've set up the fd, so copy it back. */
398 if (memory == V4L2_MEMORY_DMABUF)
399 if (copy_in_user(&up32->m.fd, &up->m.fd,
400 sizeof(int)))
401 return -EFAULT;
402
403 return 0;
404 }
405
406 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
407 {
408 struct v4l2_plane32 __user *uplane32;
409 struct v4l2_plane __user *uplane;
410 compat_caddr_t p;
411 int num_planes;
412 int ret;
413
414 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
415 get_user(kp->index, &up->index) ||
416 get_user(kp->type, &up->type) ||
417 get_user(kp->flags, &up->flags) ||
418 get_user(kp->memory, &up->memory) ||
419 get_user(kp->length, &up->length))
420 return -EFAULT;
421
422 if (V4L2_TYPE_IS_OUTPUT(kp->type))
423 if (get_user(kp->bytesused, &up->bytesused) ||
424 get_user(kp->field, &up->field) ||
425 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
426 get_user(kp->timestamp.tv_usec,
427 &up->timestamp.tv_usec))
428 return -EFAULT;
429
430 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
431 num_planes = kp->length;
432 if (num_planes == 0) {
433 kp->m.planes = NULL;
434 /* num_planes == 0 is legal, e.g. when userspace doesn't
435 * need planes array on DQBUF*/
436 return 0;
437 }
438
439 if (get_user(p, &up->m.planes))
440 return -EFAULT;
441
442 uplane32 = compat_ptr(p);
443 if (!access_ok(VERIFY_READ, uplane32,
444 num_planes * sizeof(struct v4l2_plane32)))
445 return -EFAULT;
446
447 /* We don't really care if userspace decides to kill itself
448 * by passing a very big num_planes value */
449 uplane = compat_alloc_user_space(num_planes *
450 sizeof(struct v4l2_plane));
451 kp->m.planes = (__force struct v4l2_plane *)uplane;
452
453 while (--num_planes >= 0) {
454 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
455 if (ret)
456 return ret;
457 ++uplane;
458 ++uplane32;
459 }
460 } else {
461 switch (kp->memory) {
462 case V4L2_MEMORY_MMAP:
463 if (get_user(kp->m.offset, &up->m.offset))
464 return -EFAULT;
465 break;
466 case V4L2_MEMORY_USERPTR:
467 {
468 compat_long_t tmp;
469
470 if (get_user(tmp, &up->m.userptr))
471 return -EFAULT;
472
473 kp->m.userptr = (unsigned long)compat_ptr(tmp);
474 }
475 break;
476 case V4L2_MEMORY_OVERLAY:
477 if (get_user(kp->m.offset, &up->m.offset))
478 return -EFAULT;
479 break;
480 case V4L2_MEMORY_DMABUF:
481 if (get_user(kp->m.fd, &up->m.fd))
482 return -EFAULT;
483 break;
484 }
485 }
486
487 return 0;
488 }
489
490 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
491 {
492 struct v4l2_plane32 __user *uplane32;
493 struct v4l2_plane __user *uplane;
494 compat_caddr_t p;
495 int num_planes;
496 int ret;
497
498 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
499 put_user(kp->index, &up->index) ||
500 put_user(kp->type, &up->type) ||
501 put_user(kp->flags, &up->flags) ||
502 put_user(kp->memory, &up->memory))
503 return -EFAULT;
504
505 if (put_user(kp->bytesused, &up->bytesused) ||
506 put_user(kp->field, &up->field) ||
507 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
508 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
509 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
510 put_user(kp->sequence, &up->sequence) ||
511 put_user(kp->reserved2, &up->reserved2) ||
512 put_user(kp->reserved, &up->reserved) ||
513 put_user(kp->length, &up->length))
514 return -EFAULT;
515
516 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
517 num_planes = kp->length;
518 if (num_planes == 0)
519 return 0;
520
521 uplane = (__force struct v4l2_plane __user *)kp->m.planes;
522 if (get_user(p, &up->m.planes))
523 return -EFAULT;
524 uplane32 = compat_ptr(p);
525
526 while (--num_planes >= 0) {
527 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
528 if (ret)
529 return ret;
530 ++uplane;
531 ++uplane32;
532 }
533 } else {
534 switch (kp->memory) {
535 case V4L2_MEMORY_MMAP:
536 if (put_user(kp->m.offset, &up->m.offset))
537 return -EFAULT;
538 break;
539 case V4L2_MEMORY_USERPTR:
540 if (put_user(kp->m.userptr, &up->m.userptr))
541 return -EFAULT;
542 break;
543 case V4L2_MEMORY_OVERLAY:
544 if (put_user(kp->m.offset, &up->m.offset))
545 return -EFAULT;
546 break;
547 case V4L2_MEMORY_DMABUF:
548 if (put_user(kp->m.fd, &up->m.fd))
549 return -EFAULT;
550 break;
551 }
552 }
553
554 return 0;
555 }
556
557 struct v4l2_framebuffer32 {
558 __u32 capability;
559 __u32 flags;
560 compat_caddr_t base;
561 struct {
562 __u32 width;
563 __u32 height;
564 __u32 pixelformat;
565 __u32 field;
566 __u32 bytesperline;
567 __u32 sizeimage;
568 __u32 colorspace;
569 __u32 priv;
570 } fmt;
571 };
572
573 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
574 {
575 u32 tmp;
576
577 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
578 get_user(tmp, &up->base) ||
579 get_user(kp->capability, &up->capability) ||
580 get_user(kp->flags, &up->flags) ||
581 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
582 return -EFAULT;
583 kp->base = (__force void *)compat_ptr(tmp);
584 return 0;
585 }
586
587 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
588 {
589 u32 tmp = (u32)((unsigned long)kp->base);
590
591 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
592 put_user(tmp, &up->base) ||
593 put_user(kp->capability, &up->capability) ||
594 put_user(kp->flags, &up->flags) ||
595 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
596 return -EFAULT;
597 return 0;
598 }
599
600 struct v4l2_input32 {
601 __u32 index; /* Which input */
602 __u8 name[32]; /* Label */
603 __u32 type; /* Type of input */
604 __u32 audioset; /* Associated audios (bitfield) */
605 __u32 tuner; /* Associated tuner */
606 compat_u64 std;
607 __u32 status;
608 __u32 reserved[4];
609 };
610
611 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
612 Otherwise it is identical to the 32-bit version. */
613 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
614 {
615 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
616 return -EFAULT;
617 return 0;
618 }
619
620 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
621 {
622 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
623 return -EFAULT;
624 return 0;
625 }
626
627 struct v4l2_ext_controls32 {
628 __u32 which;
629 __u32 count;
630 __u32 error_idx;
631 __u32 reserved[2];
632 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
633 };
634
635 struct v4l2_ext_control32 {
636 __u32 id;
637 __u32 size;
638 __u32 reserved2[1];
639 union {
640 __s32 value;
641 __s64 value64;
642 compat_caddr_t string; /* actually char * */
643 };
644 } __attribute__ ((packed));
645
646 /* The following function really belong in v4l2-common, but that causes
647 a circular dependency between modules. We need to think about this, but
648 for now this will do. */
649
650 /* Return non-zero if this control is a pointer type. Currently only
651 type STRING is a pointer type. */
652 static inline int ctrl_is_pointer(u32 id)
653 {
654 switch (id) {
655 case V4L2_CID_RDS_TX_PS_NAME:
656 case V4L2_CID_RDS_TX_RADIO_TEXT:
657 return 1;
658 default:
659 return 0;
660 }
661 }
662
663 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
664 {
665 struct v4l2_ext_control32 __user *ucontrols;
666 struct v4l2_ext_control __user *kcontrols;
667 int n;
668 compat_caddr_t p;
669
670 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
671 get_user(kp->which, &up->which) ||
672 get_user(kp->count, &up->count) ||
673 get_user(kp->error_idx, &up->error_idx) ||
674 copy_from_user(kp->reserved, up->reserved,
675 sizeof(kp->reserved)))
676 return -EFAULT;
677 n = kp->count;
678 if (n == 0) {
679 kp->controls = NULL;
680 return 0;
681 }
682 if (get_user(p, &up->controls))
683 return -EFAULT;
684 ucontrols = compat_ptr(p);
685 if (!access_ok(VERIFY_READ, ucontrols,
686 n * sizeof(struct v4l2_ext_control32)))
687 return -EFAULT;
688 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
689 kp->controls = (__force struct v4l2_ext_control *)kcontrols;
690 while (--n >= 0) {
691 u32 id;
692
693 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
694 return -EFAULT;
695 if (get_user(id, &kcontrols->id))
696 return -EFAULT;
697 if (ctrl_is_pointer(id)) {
698 void __user *s;
699
700 if (get_user(p, &ucontrols->string))
701 return -EFAULT;
702 s = compat_ptr(p);
703 if (put_user(s, &kcontrols->string))
704 return -EFAULT;
705 }
706 ucontrols++;
707 kcontrols++;
708 }
709 return 0;
710 }
711
712 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
713 {
714 struct v4l2_ext_control32 __user *ucontrols;
715 struct v4l2_ext_control __user *kcontrols =
716 (__force struct v4l2_ext_control __user *)kp->controls;
717 int n = kp->count;
718 compat_caddr_t p;
719
720 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
721 put_user(kp->which, &up->which) ||
722 put_user(kp->count, &up->count) ||
723 put_user(kp->error_idx, &up->error_idx) ||
724 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
725 return -EFAULT;
726 if (!kp->count)
727 return 0;
728
729 if (get_user(p, &up->controls))
730 return -EFAULT;
731 ucontrols = compat_ptr(p);
732 if (!access_ok(VERIFY_WRITE, ucontrols,
733 n * sizeof(struct v4l2_ext_control32)))
734 return -EFAULT;
735
736 while (--n >= 0) {
737 unsigned size = sizeof(*ucontrols);
738 u32 id;
739
740 if (get_user(id, &kcontrols->id))
741 return -EFAULT;
742 /* Do not modify the pointer when copying a pointer control.
743 The contents of the pointer was changed, not the pointer
744 itself. */
745 if (ctrl_is_pointer(id))
746 size -= sizeof(ucontrols->value64);
747 if (copy_in_user(ucontrols, kcontrols, size))
748 return -EFAULT;
749 ucontrols++;
750 kcontrols++;
751 }
752 return 0;
753 }
754
755 struct v4l2_event32 {
756 __u32 type;
757 union {
758 compat_s64 value64;
759 __u8 data[64];
760 } u;
761 __u32 pending;
762 __u32 sequence;
763 struct compat_timespec timestamp;
764 __u32 id;
765 __u32 reserved[8];
766 };
767
768 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
769 {
770 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
771 put_user(kp->type, &up->type) ||
772 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
773 put_user(kp->pending, &up->pending) ||
774 put_user(kp->sequence, &up->sequence) ||
775 compat_put_timespec(&kp->timestamp, &up->timestamp) ||
776 put_user(kp->id, &up->id) ||
777 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
778 return -EFAULT;
779 return 0;
780 }
781
782 struct v4l2_edid32 {
783 __u32 pad;
784 __u32 start_block;
785 __u32 blocks;
786 __u32 reserved[5];
787 compat_caddr_t edid;
788 };
789
790 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
791 {
792 u32 tmp;
793
794 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
795 get_user(kp->pad, &up->pad) ||
796 get_user(kp->start_block, &up->start_block) ||
797 get_user(kp->blocks, &up->blocks) ||
798 get_user(tmp, &up->edid) ||
799 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
800 return -EFAULT;
801 kp->edid = (__force u8 *)compat_ptr(tmp);
802 return 0;
803 }
804
805 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
806 {
807 u32 tmp = (u32)((unsigned long)kp->edid);
808
809 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
810 put_user(kp->pad, &up->pad) ||
811 put_user(kp->start_block, &up->start_block) ||
812 put_user(kp->blocks, &up->blocks) ||
813 put_user(tmp, &up->edid) ||
814 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
815 return -EFAULT;
816 return 0;
817 }
818
819
820 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
821 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
822 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
823 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
824 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
825 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
826 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
827 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
828 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
829 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
830 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
831 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
832 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
833 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
834 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
835 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
836 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
837 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
838
839 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
840 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
841 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
842 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
843 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
844 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
845 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
846
847 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
848 {
849 union {
850 struct v4l2_format v2f;
851 struct v4l2_buffer v2b;
852 struct v4l2_framebuffer v2fb;
853 struct v4l2_input v2i;
854 struct v4l2_standard v2s;
855 struct v4l2_ext_controls v2ecs;
856 struct v4l2_event v2ev;
857 struct v4l2_create_buffers v2crt;
858 struct v4l2_edid v2edid;
859 unsigned long vx;
860 int vi;
861 } karg;
862 void __user *up = compat_ptr(arg);
863 int compatible_arg = 1;
864 long err = 0;
865
866 /* First, convert the command. */
867 switch (cmd) {
868 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
869 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
870 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
871 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
872 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
873 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
874 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
875 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
876 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
877 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
878 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
879 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
880 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
881 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
882 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
883 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
884 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
885 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
886 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
887 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
888 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
889 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
890 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
891 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
892 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
893 }
894
895 switch (cmd) {
896 case VIDIOC_OVERLAY:
897 case VIDIOC_STREAMON:
898 case VIDIOC_STREAMOFF:
899 case VIDIOC_S_INPUT:
900 case VIDIOC_S_OUTPUT:
901 err = get_user(karg.vi, (s32 __user *)up);
902 compatible_arg = 0;
903 break;
904
905 case VIDIOC_G_INPUT:
906 case VIDIOC_G_OUTPUT:
907 compatible_arg = 0;
908 break;
909
910 case VIDIOC_G_EDID:
911 case VIDIOC_S_EDID:
912 err = get_v4l2_edid32(&karg.v2edid, up);
913 compatible_arg = 0;
914 break;
915
916 case VIDIOC_G_FMT:
917 case VIDIOC_S_FMT:
918 case VIDIOC_TRY_FMT:
919 err = get_v4l2_format32(&karg.v2f, up);
920 compatible_arg = 0;
921 break;
922
923 case VIDIOC_CREATE_BUFS:
924 err = get_v4l2_create32(&karg.v2crt, up);
925 compatible_arg = 0;
926 break;
927
928 case VIDIOC_PREPARE_BUF:
929 case VIDIOC_QUERYBUF:
930 case VIDIOC_QBUF:
931 case VIDIOC_DQBUF:
932 err = get_v4l2_buffer32(&karg.v2b, up);
933 compatible_arg = 0;
934 break;
935
936 case VIDIOC_S_FBUF:
937 err = get_v4l2_framebuffer32(&karg.v2fb, up);
938 compatible_arg = 0;
939 break;
940
941 case VIDIOC_G_FBUF:
942 compatible_arg = 0;
943 break;
944
945 case VIDIOC_ENUMSTD:
946 err = get_v4l2_standard32(&karg.v2s, up);
947 compatible_arg = 0;
948 break;
949
950 case VIDIOC_ENUMINPUT:
951 err = get_v4l2_input32(&karg.v2i, up);
952 compatible_arg = 0;
953 break;
954
955 case VIDIOC_G_EXT_CTRLS:
956 case VIDIOC_S_EXT_CTRLS:
957 case VIDIOC_TRY_EXT_CTRLS:
958 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
959 compatible_arg = 0;
960 break;
961 case VIDIOC_DQEVENT:
962 compatible_arg = 0;
963 break;
964 }
965 if (err)
966 return err;
967
968 if (compatible_arg)
969 err = native_ioctl(file, cmd, (unsigned long)up);
970 else {
971 mm_segment_t old_fs = get_fs();
972
973 set_fs(KERNEL_DS);
974 err = native_ioctl(file, cmd, (unsigned long)&karg);
975 set_fs(old_fs);
976 }
977
978 /* Special case: even after an error we need to put the
979 results back for these ioctls since the error_idx will
980 contain information on which control failed. */
981 switch (cmd) {
982 case VIDIOC_G_EXT_CTRLS:
983 case VIDIOC_S_EXT_CTRLS:
984 case VIDIOC_TRY_EXT_CTRLS:
985 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
986 err = -EFAULT;
987 break;
988 }
989 if (err)
990 return err;
991
992 switch (cmd) {
993 case VIDIOC_S_INPUT:
994 case VIDIOC_S_OUTPUT:
995 case VIDIOC_G_INPUT:
996 case VIDIOC_G_OUTPUT:
997 err = put_user(((s32)karg.vi), (s32 __user *)up);
998 break;
999
1000 case VIDIOC_G_FBUF:
1001 err = put_v4l2_framebuffer32(&karg.v2fb, up);
1002 break;
1003
1004 case VIDIOC_DQEVENT:
1005 err = put_v4l2_event32(&karg.v2ev, up);
1006 break;
1007
1008 case VIDIOC_G_EDID:
1009 case VIDIOC_S_EDID:
1010 err = put_v4l2_edid32(&karg.v2edid, up);
1011 break;
1012
1013 case VIDIOC_G_FMT:
1014 case VIDIOC_S_FMT:
1015 case VIDIOC_TRY_FMT:
1016 err = put_v4l2_format32(&karg.v2f, up);
1017 break;
1018
1019 case VIDIOC_CREATE_BUFS:
1020 err = put_v4l2_create32(&karg.v2crt, up);
1021 break;
1022
1023 case VIDIOC_QUERYBUF:
1024 case VIDIOC_QBUF:
1025 case VIDIOC_DQBUF:
1026 err = put_v4l2_buffer32(&karg.v2b, up);
1027 break;
1028
1029 case VIDIOC_ENUMSTD:
1030 err = put_v4l2_standard32(&karg.v2s, up);
1031 break;
1032
1033 case VIDIOC_ENUMINPUT:
1034 err = put_v4l2_input32(&karg.v2i, up);
1035 break;
1036 }
1037 return err;
1038 }
1039
1040 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1041 {
1042 struct video_device *vdev = video_devdata(file);
1043 long ret = -ENOIOCTLCMD;
1044
1045 if (!file->f_op->unlocked_ioctl)
1046 return ret;
1047
1048 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1049 ret = do_video_ioctl(file, cmd, arg);
1050 else if (vdev->fops->compat_ioctl32)
1051 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1052
1053 if (ret == -ENOIOCTLCMD)
1054 pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1055 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1056 return ret;
1057 }
1058 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux with added FPC-III support