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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / media / video / v4l2-compat-ioctl32.c
blob61979b70f3883ab340eb2e8c01350d88a71defa3
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 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
163 {
164 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)) ||
165 get_user(kp->type, &up->type))
166 return -EFAULT;
167 switch (kp->type) {
168 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
169 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
170 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
171 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
172 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
173 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
174 &up->fmt.pix_mp);
175 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
176 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
177 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
178 case V4L2_BUF_TYPE_VBI_CAPTURE:
179 case V4L2_BUF_TYPE_VBI_OUTPUT:
180 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
181 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
182 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
183 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
184 case V4L2_BUF_TYPE_PRIVATE:
185 if (copy_from_user(kp, up, sizeof(kp->fmt.raw_data)))
186 return -EFAULT;
187 return 0;
188 default:
189 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
190 kp->type);
191 return -EINVAL;
192 }
193 }
194
195 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
196 {
197 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
198 put_user(kp->type, &up->type))
199 return -EFAULT;
200 switch (kp->type) {
201 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
202 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
203 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
204 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
205 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
206 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
207 &up->fmt.pix_mp);
208 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
209 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
210 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
211 case V4L2_BUF_TYPE_VBI_CAPTURE:
212 case V4L2_BUF_TYPE_VBI_OUTPUT:
213 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
214 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
215 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
216 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
217 case V4L2_BUF_TYPE_PRIVATE:
218 if (copy_to_user(up, kp, sizeof(up->fmt.raw_data)))
219 return -EFAULT;
220 return 0;
221 default:
222 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
223 kp->type);
224 return -EINVAL;
225 }
226 }
227
228 struct v4l2_standard32 {
229 __u32 index;
230 __u32 id[2]; /* __u64 would get the alignment wrong */
231 __u8 name[24];
232 struct v4l2_fract frameperiod; /* Frames, not fields */
233 __u32 framelines;
234 __u32 reserved[4];
235 };
236
237 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
238 {
239 /* other fields are not set by the user, nor used by the driver */
240 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
241 get_user(kp->index, &up->index))
242 return -EFAULT;
243 return 0;
244 }
245
246 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
247 {
248 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
249 put_user(kp->index, &up->index) ||
250 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
251 copy_to_user(up->name, kp->name, 24) ||
252 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
253 put_user(kp->framelines, &up->framelines) ||
254 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
255 return -EFAULT;
256 return 0;
257 }
258
259 struct v4l2_plane32 {
260 __u32 bytesused;
261 __u32 length;
262 union {
263 __u32 mem_offset;
264 compat_long_t userptr;
265 } m;
266 __u32 data_offset;
267 __u32 reserved[11];
268 };
269
270 struct v4l2_buffer32 {
271 __u32 index;
272 enum v4l2_buf_type type;
273 __u32 bytesused;
274 __u32 flags;
275 enum v4l2_field field;
276 struct compat_timeval timestamp;
277 struct v4l2_timecode timecode;
278 __u32 sequence;
279
280 /* memory location */
281 enum v4l2_memory memory;
282 union {
283 __u32 offset;
284 compat_long_t userptr;
285 compat_caddr_t planes;
286 } m;
287 __u32 length;
288 __u32 input;
289 __u32 reserved;
290 };
291
292 static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
293 enum v4l2_memory memory)
294 {
295 void __user *up_pln;
296 compat_long_t p;
297
298 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
299 copy_in_user(&up->data_offset, &up32->data_offset,
300 sizeof(__u32)))
301 return -EFAULT;
302
303 if (memory == V4L2_MEMORY_USERPTR) {
304 if (get_user(p, &up32->m.userptr))
305 return -EFAULT;
306 up_pln = compat_ptr(p);
307 if (put_user((unsigned long)up_pln, &up->m.userptr))
308 return -EFAULT;
309 } else {
310 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
311 sizeof(__u32)))
312 return -EFAULT;
313 }
314
315 return 0;
316 }
317
318 static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
319 enum v4l2_memory memory)
320 {
321 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
322 copy_in_user(&up32->data_offset, &up->data_offset,
323 sizeof(__u32)))
324 return -EFAULT;
325
326 /* For MMAP, driver might've set up the offset, so copy it back.
327 * USERPTR stays the same (was userspace-provided), so no copying. */
328 if (memory == V4L2_MEMORY_MMAP)
329 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
330 sizeof(__u32)))
331 return -EFAULT;
332
333 return 0;
334 }
335
336 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
337 {
338 struct v4l2_plane32 __user *uplane32;
339 struct v4l2_plane __user *uplane;
340 compat_caddr_t p;
341 int num_planes;
342 int ret;
343
344 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
345 get_user(kp->index, &up->index) ||
346 get_user(kp->type, &up->type) ||
347 get_user(kp->flags, &up->flags) ||
348 get_user(kp->memory, &up->memory) ||
349 get_user(kp->input, &up->input))
350 return -EFAULT;
351
352 if (V4L2_TYPE_IS_OUTPUT(kp->type))
353 if (get_user(kp->bytesused, &up->bytesused) ||
354 get_user(kp->field, &up->field) ||
355 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
356 get_user(kp->timestamp.tv_usec,
357 &up->timestamp.tv_usec))
358 return -EFAULT;
359
360 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
361 if (get_user(kp->length, &up->length))
362 return -EFAULT;
363
364 num_planes = kp->length;
365 if (num_planes == 0) {
366 kp->m.planes = NULL;
367 /* num_planes == 0 is legal, e.g. when userspace doesn't
368 * need planes array on DQBUF*/
369 return 0;
370 }
371
372 if (get_user(p, &up->m.planes))
373 return -EFAULT;
374
375 uplane32 = compat_ptr(p);
376 if (!access_ok(VERIFY_READ, uplane32,
377 num_planes * sizeof(struct v4l2_plane32)))
378 return -EFAULT;
379
380 /* We don't really care if userspace decides to kill itself
381 * by passing a very big num_planes value */
382 uplane = compat_alloc_user_space(num_planes *
383 sizeof(struct v4l2_plane));
384 kp->m.planes = uplane;
385
386 while (--num_planes >= 0) {
387 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
388 if (ret)
389 return ret;
390 ++uplane;
391 ++uplane32;
392 }
393 } else {
394 switch (kp->memory) {
395 case V4L2_MEMORY_MMAP:
396 if (get_user(kp->length, &up->length) ||
397 get_user(kp->m.offset, &up->m.offset))
398 return -EFAULT;
399 break;
400 case V4L2_MEMORY_USERPTR:
401 {
402 compat_long_t tmp;
403
404 if (get_user(kp->length, &up->length) ||
405 get_user(tmp, &up->m.userptr))
406 return -EFAULT;
407
408 kp->m.userptr = (unsigned long)compat_ptr(tmp);
409 }
410 break;
411 case V4L2_MEMORY_OVERLAY:
412 if (get_user(kp->m.offset, &up->m.offset))
413 return -EFAULT;
414 break;
415 }
416 }
417
418 return 0;
419 }
420
421 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
422 {
423 struct v4l2_plane32 __user *uplane32;
424 struct v4l2_plane __user *uplane;
425 compat_caddr_t p;
426 int num_planes;
427 int ret;
428
429 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
430 put_user(kp->index, &up->index) ||
431 put_user(kp->type, &up->type) ||
432 put_user(kp->flags, &up->flags) ||
433 put_user(kp->memory, &up->memory) ||
434 put_user(kp->input, &up->input))
435 return -EFAULT;
436
437 if (put_user(kp->bytesused, &up->bytesused) ||
438 put_user(kp->field, &up->field) ||
439 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
440 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
441 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
442 put_user(kp->sequence, &up->sequence) ||
443 put_user(kp->reserved, &up->reserved))
444 return -EFAULT;
445
446 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
447 num_planes = kp->length;
448 if (num_planes == 0)
449 return 0;
450
451 uplane = kp->m.planes;
452 if (get_user(p, &up->m.planes))
453 return -EFAULT;
454 uplane32 = compat_ptr(p);
455
456 while (--num_planes >= 0) {
457 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
458 if (ret)
459 return ret;
460 ++uplane;
461 ++uplane32;
462 }
463 } else {
464 switch (kp->memory) {
465 case V4L2_MEMORY_MMAP:
466 if (put_user(kp->length, &up->length) ||
467 put_user(kp->m.offset, &up->m.offset))
468 return -EFAULT;
469 break;
470 case V4L2_MEMORY_USERPTR:
471 if (put_user(kp->length, &up->length) ||
472 put_user(kp->m.userptr, &up->m.userptr))
473 return -EFAULT;
474 break;
475 case V4L2_MEMORY_OVERLAY:
476 if (put_user(kp->m.offset, &up->m.offset))
477 return -EFAULT;
478 break;
479 }
480 }
481
482 return 0;
483 }
484
485 struct v4l2_framebuffer32 {
486 __u32 capability;
487 __u32 flags;
488 compat_caddr_t base;
489 struct v4l2_pix_format fmt;
490 };
491
492 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
493 {
494 u32 tmp;
495
496 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
497 get_user(tmp, &up->base) ||
498 get_user(kp->capability, &up->capability) ||
499 get_user(kp->flags, &up->flags))
500 return -EFAULT;
501 kp->base = compat_ptr(tmp);
502 get_v4l2_pix_format(&kp->fmt, &up->fmt);
503 return 0;
504 }
505
506 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
507 {
508 u32 tmp = (u32)((unsigned long)kp->base);
509
510 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
511 put_user(tmp, &up->base) ||
512 put_user(kp->capability, &up->capability) ||
513 put_user(kp->flags, &up->flags))
514 return -EFAULT;
515 put_v4l2_pix_format(&kp->fmt, &up->fmt);
516 return 0;
517 }
518
519 struct v4l2_input32 {
520 __u32 index; /* Which input */
521 __u8 name[32]; /* Label */
522 __u32 type; /* Type of input */
523 __u32 audioset; /* Associated audios (bitfield) */
524 __u32 tuner; /* Associated tuner */
525 v4l2_std_id std;
526 __u32 status;
527 __u32 reserved[4];
528 } __attribute__ ((packed));
529
530 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
531 Otherwise it is identical to the 32-bit version. */
532 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
533 {
534 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
535 return -EFAULT;
536 return 0;
537 }
538
539 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
540 {
541 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
542 return -EFAULT;
543 return 0;
544 }
545
546 struct v4l2_ext_controls32 {
547 __u32 ctrl_class;
548 __u32 count;
549 __u32 error_idx;
550 __u32 reserved[2];
551 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
552 };
553
554 struct v4l2_ext_control32 {
555 __u32 id;
556 __u32 size;
557 __u32 reserved2[1];
558 union {
559 __s32 value;
560 __s64 value64;
561 compat_caddr_t string; /* actually char * */
562 };
563 } __attribute__ ((packed));
564
565 /* The following function really belong in v4l2-common, but that causes
566 a circular dependency between modules. We need to think about this, but
567 for now this will do. */
568
569 /* Return non-zero if this control is a pointer type. Currently only
570 type STRING is a pointer type. */
571 static inline int ctrl_is_pointer(u32 id)
572 {
573 switch (id) {
574 case V4L2_CID_RDS_TX_PS_NAME:
575 case V4L2_CID_RDS_TX_RADIO_TEXT:
576 return 1;
577 default:
578 return 0;
579 }
580 }
581
582 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
583 {
584 struct v4l2_ext_control32 __user *ucontrols;
585 struct v4l2_ext_control __user *kcontrols;
586 int n;
587 compat_caddr_t p;
588
589 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
590 get_user(kp->ctrl_class, &up->ctrl_class) ||
591 get_user(kp->count, &up->count) ||
592 get_user(kp->error_idx, &up->error_idx) ||
593 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
594 return -EFAULT;
595 n = kp->count;
596 if (n == 0) {
597 kp->controls = NULL;
598 return 0;
599 }
600 if (get_user(p, &up->controls))
601 return -EFAULT;
602 ucontrols = compat_ptr(p);
603 if (!access_ok(VERIFY_READ, ucontrols,
604 n * sizeof(struct v4l2_ext_control32)))
605 return -EFAULT;
606 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
607 kp->controls = kcontrols;
608 while (--n >= 0) {
609 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
610 return -EFAULT;
611 if (ctrl_is_pointer(kcontrols->id)) {
612 void __user *s;
613
614 if (get_user(p, &ucontrols->string))
615 return -EFAULT;
616 s = compat_ptr(p);
617 if (put_user(s, &kcontrols->string))
618 return -EFAULT;
619 }
620 ucontrols++;
621 kcontrols++;
622 }
623 return 0;
624 }
625
626 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
627 {
628 struct v4l2_ext_control32 __user *ucontrols;
629 struct v4l2_ext_control __user *kcontrols = kp->controls;
630 int n = kp->count;
631 compat_caddr_t p;
632
633 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
634 put_user(kp->ctrl_class, &up->ctrl_class) ||
635 put_user(kp->count, &up->count) ||
636 put_user(kp->error_idx, &up->error_idx) ||
637 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
638 return -EFAULT;
639 if (!kp->count)
640 return 0;
641
642 if (get_user(p, &up->controls))
643 return -EFAULT;
644 ucontrols = compat_ptr(p);
645 if (!access_ok(VERIFY_WRITE, ucontrols,
646 n * sizeof(struct v4l2_ext_control32)))
647 return -EFAULT;
648
649 while (--n >= 0) {
650 unsigned size = sizeof(*ucontrols);
651
652 /* Do not modify the pointer when copying a pointer control.
653 The contents of the pointer was changed, not the pointer
654 itself. */
655 if (ctrl_is_pointer(kcontrols->id))
656 size -= sizeof(ucontrols->value64);
657 if (copy_in_user(ucontrols, kcontrols, size))
658 return -EFAULT;
659 ucontrols++;
660 kcontrols++;
661 }
662 return 0;
663 }
664
665 struct v4l2_event32 {
666 __u32 type;
667 union {
668 __u8 data[64];
669 } u;
670 __u32 pending;
671 __u32 sequence;
672 struct compat_timespec timestamp;
673 __u32 id;
674 __u32 reserved[8];
675 };
676
677 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
678 {
679 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
680 put_user(kp->type, &up->type) ||
681 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
682 put_user(kp->pending, &up->pending) ||
683 put_user(kp->sequence, &up->sequence) ||
684 put_compat_timespec(&kp->timestamp, &up->timestamp) ||
685 put_user(kp->id, &up->id) ||
686 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
687 return -EFAULT;
688 return 0;
689 }
690
691 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
692 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
693 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
694 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
695 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
696 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
697 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
698 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
699 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
700 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
701 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
702 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
703 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
704 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
705
706 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
707 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
708 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
709 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
710 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
711 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
712 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
713
714 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
715 {
716 union {
717 struct v4l2_format v2f;
718 struct v4l2_buffer v2b;
719 struct v4l2_framebuffer v2fb;
720 struct v4l2_input v2i;
721 struct v4l2_standard v2s;
722 struct v4l2_ext_controls v2ecs;
723 struct v4l2_event v2ev;
724 unsigned long vx;
725 int vi;
726 } karg;
727 void __user *up = compat_ptr(arg);
728 int compatible_arg = 1;
729 long err = 0;
730
731 /* First, convert the command. */
732 switch (cmd) {
733 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
734 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
735 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
736 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
737 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
738 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
739 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
740 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
741 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
742 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
743 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
744 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
745 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
746 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
747 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
748 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
749 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
750 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
751 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
752 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
753 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
754 }
755
756 switch (cmd) {
757 case VIDIOC_OVERLAY:
758 case VIDIOC_STREAMON:
759 case VIDIOC_STREAMOFF:
760 case VIDIOC_S_INPUT:
761 case VIDIOC_S_OUTPUT:
762 err = get_user(karg.vi, (s32 __user *)up);
763 compatible_arg = 0;
764 break;
765
766 case VIDIOC_G_INPUT:
767 case VIDIOC_G_OUTPUT:
768 compatible_arg = 0;
769 break;
770
771 case VIDIOC_G_FMT:
772 case VIDIOC_S_FMT:
773 case VIDIOC_TRY_FMT:
774 err = get_v4l2_format32(&karg.v2f, up);
775 compatible_arg = 0;
776 break;
777
778 case VIDIOC_QUERYBUF:
779 case VIDIOC_QBUF:
780 case VIDIOC_DQBUF:
781 err = get_v4l2_buffer32(&karg.v2b, up);
782 compatible_arg = 0;
783 break;
784
785 case VIDIOC_S_FBUF:
786 err = get_v4l2_framebuffer32(&karg.v2fb, up);
787 compatible_arg = 0;
788 break;
789
790 case VIDIOC_G_FBUF:
791 compatible_arg = 0;
792 break;
793
794 case VIDIOC_ENUMSTD:
795 err = get_v4l2_standard32(&karg.v2s, up);
796 compatible_arg = 0;
797 break;
798
799 case VIDIOC_ENUMINPUT:
800 err = get_v4l2_input32(&karg.v2i, up);
801 compatible_arg = 0;
802 break;
803
804 case VIDIOC_G_EXT_CTRLS:
805 case VIDIOC_S_EXT_CTRLS:
806 case VIDIOC_TRY_EXT_CTRLS:
807 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
808 compatible_arg = 0;
809 break;
810 case VIDIOC_DQEVENT:
811 compatible_arg = 0;
812 break;
813 }
814 if (err)
815 return err;
816
817 if (compatible_arg)
818 err = native_ioctl(file, cmd, (unsigned long)up);
819 else {
820 mm_segment_t old_fs = get_fs();
821
822 set_fs(KERNEL_DS);
823 err = native_ioctl(file, cmd, (unsigned long)&karg);
824 set_fs(old_fs);
825 }
826
827 /* Special case: even after an error we need to put the
828 results back for these ioctls since the error_idx will
829 contain information on which control failed. */
830 switch (cmd) {
831 case VIDIOC_G_EXT_CTRLS:
832 case VIDIOC_S_EXT_CTRLS:
833 case VIDIOC_TRY_EXT_CTRLS:
834 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
835 err = -EFAULT;
836 break;
837 }
838 if (err)
839 return err;
840
841 switch (cmd) {
842 case VIDIOC_S_INPUT:
843 case VIDIOC_S_OUTPUT:
844 case VIDIOC_G_INPUT:
845 case VIDIOC_G_OUTPUT:
846 err = put_user(((s32)karg.vi), (s32 __user *)up);
847 break;
848
849 case VIDIOC_G_FBUF:
850 err = put_v4l2_framebuffer32(&karg.v2fb, up);
851 break;
852
853 case VIDIOC_DQEVENT:
854 err = put_v4l2_event32(&karg.v2ev, up);
855 break;
856
857 case VIDIOC_G_FMT:
858 case VIDIOC_S_FMT:
859 case VIDIOC_TRY_FMT:
860 err = put_v4l2_format32(&karg.v2f, up);
861 break;
862
863 case VIDIOC_QUERYBUF:
864 case VIDIOC_QBUF:
865 case VIDIOC_DQBUF:
866 err = put_v4l2_buffer32(&karg.v2b, up);
867 break;
868
869 case VIDIOC_ENUMSTD:
870 err = put_v4l2_standard32(&karg.v2s, up);
871 break;
872
873 case VIDIOC_ENUMINPUT:
874 err = put_v4l2_input32(&karg.v2i, up);
875 break;
876 }
877 return err;
878 }
879
880 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
881 {
882 long ret = -ENOIOCTLCMD;
883
884 if (!file->f_op->unlocked_ioctl)
885 return ret;
886
887 switch (cmd) {
888 case VIDIOC_QUERYCAP:
889 case VIDIOC_RESERVED:
890 case VIDIOC_ENUM_FMT:
891 case VIDIOC_G_FMT32:
892 case VIDIOC_S_FMT32:
893 case VIDIOC_REQBUFS:
894 case VIDIOC_QUERYBUF32:
895 case VIDIOC_G_FBUF32:
896 case VIDIOC_S_FBUF32:
897 case VIDIOC_OVERLAY32:
898 case VIDIOC_QBUF32:
899 case VIDIOC_DQBUF32:
900 case VIDIOC_STREAMON32:
901 case VIDIOC_STREAMOFF32:
902 case VIDIOC_G_PARM:
903 case VIDIOC_S_PARM:
904 case VIDIOC_G_STD:
905 case VIDIOC_S_STD:
906 case VIDIOC_ENUMSTD32:
907 case VIDIOC_ENUMINPUT32:
908 case VIDIOC_G_CTRL:
909 case VIDIOC_S_CTRL:
910 case VIDIOC_G_TUNER:
911 case VIDIOC_S_TUNER:
912 case VIDIOC_G_AUDIO:
913 case VIDIOC_S_AUDIO:
914 case VIDIOC_QUERYCTRL:
915 case VIDIOC_QUERYMENU:
916 case VIDIOC_G_INPUT32:
917 case VIDIOC_S_INPUT32:
918 case VIDIOC_G_OUTPUT32:
919 case VIDIOC_S_OUTPUT32:
920 case VIDIOC_ENUMOUTPUT:
921 case VIDIOC_G_AUDOUT:
922 case VIDIOC_S_AUDOUT:
923 case VIDIOC_G_MODULATOR:
924 case VIDIOC_S_MODULATOR:
925 case VIDIOC_S_FREQUENCY:
926 case VIDIOC_G_FREQUENCY:
927 case VIDIOC_CROPCAP:
928 case VIDIOC_G_CROP:
929 case VIDIOC_S_CROP:
930 case VIDIOC_G_JPEGCOMP:
931 case VIDIOC_S_JPEGCOMP:
932 case VIDIOC_QUERYSTD:
933 case VIDIOC_TRY_FMT32:
934 case VIDIOC_ENUMAUDIO:
935 case VIDIOC_ENUMAUDOUT:
936 case VIDIOC_G_PRIORITY:
937 case VIDIOC_S_PRIORITY:
938 case VIDIOC_G_SLICED_VBI_CAP:
939 case VIDIOC_LOG_STATUS:
940 case VIDIOC_G_EXT_CTRLS32:
941 case VIDIOC_S_EXT_CTRLS32:
942 case VIDIOC_TRY_EXT_CTRLS32:
943 case VIDIOC_ENUM_FRAMESIZES:
944 case VIDIOC_ENUM_FRAMEINTERVALS:
945 case VIDIOC_G_ENC_INDEX:
946 case VIDIOC_ENCODER_CMD:
947 case VIDIOC_TRY_ENCODER_CMD:
948 case VIDIOC_DBG_S_REGISTER:
949 case VIDIOC_DBG_G_REGISTER:
950 case VIDIOC_DBG_G_CHIP_IDENT:
951 case VIDIOC_S_HW_FREQ_SEEK:
952 case VIDIOC_ENUM_DV_PRESETS:
953 case VIDIOC_S_DV_PRESET:
954 case VIDIOC_G_DV_PRESET:
955 case VIDIOC_QUERY_DV_PRESET:
956 case VIDIOC_S_DV_TIMINGS:
957 case VIDIOC_G_DV_TIMINGS:
958 case VIDIOC_DQEVENT:
959 case VIDIOC_DQEVENT32:
960 case VIDIOC_SUBSCRIBE_EVENT:
961 case VIDIOC_UNSUBSCRIBE_EVENT:
962 ret = do_video_ioctl(file, cmd, arg);
963 break;
964
965 default:
966 printk(KERN_WARNING "compat_ioctl32: "
967 "unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
968 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
969 break;
970 }
971 return ret;
972 }
973 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
974 #endif
975
976 MODULE_LICENSE("GPL");
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