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pvclock: introduce seqcount-like API
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-compat-ioctl32.c
blobbacecbd68a6d8887b47eafc11d4e9acb6256fb6c
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 copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
285 return -EFAULT;
286 return __put_v4l2_format32(&kp->format, &up->format);
287 }
288
289 struct v4l2_standard32 {
290 __u32 index;
291 compat_u64 id;
292 __u8 name[24];
293 struct v4l2_fract frameperiod; /* Frames, not fields */
294 __u32 framelines;
295 __u32 reserved[4];
296 };
297
298 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
299 {
300 /* other fields are not set by the user, nor used by the driver */
301 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
302 get_user(kp->index, &up->index))
303 return -EFAULT;
304 return 0;
305 }
306
307 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
308 {
309 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
310 put_user(kp->index, &up->index) ||
311 put_user(kp->id, &up->id) ||
312 copy_to_user(up->name, kp->name, 24) ||
313 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
314 put_user(kp->framelines, &up->framelines) ||
315 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
316 return -EFAULT;
317 return 0;
318 }
319
320 struct v4l2_plane32 {
321 __u32 bytesused;
322 __u32 length;
323 union {
324 __u32 mem_offset;
325 compat_long_t userptr;
326 __s32 fd;
327 } m;
328 __u32 data_offset;
329 __u32 reserved[11];
330 };
331
332 struct v4l2_buffer32 {
333 __u32 index;
334 __u32 type; /* enum v4l2_buf_type */
335 __u32 bytesused;
336 __u32 flags;
337 __u32 field; /* enum v4l2_field */
338 struct compat_timeval timestamp;
339 struct v4l2_timecode timecode;
340 __u32 sequence;
341
342 /* memory location */
343 __u32 memory; /* enum v4l2_memory */
344 union {
345 __u32 offset;
346 compat_long_t userptr;
347 compat_caddr_t planes;
348 __s32 fd;
349 } m;
350 __u32 length;
351 __u32 reserved2;
352 __u32 reserved;
353 };
354
355 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
356 enum v4l2_memory memory)
357 {
358 void __user *up_pln;
359 compat_long_t p;
360
361 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
362 copy_in_user(&up->data_offset, &up32->data_offset,
363 sizeof(__u32)))
364 return -EFAULT;
365
366 if (memory == V4L2_MEMORY_USERPTR) {
367 if (get_user(p, &up32->m.userptr))
368 return -EFAULT;
369 up_pln = compat_ptr(p);
370 if (put_user((unsigned long)up_pln, &up->m.userptr))
371 return -EFAULT;
372 } else if (memory == V4L2_MEMORY_DMABUF) {
373 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
374 return -EFAULT;
375 } else {
376 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
377 sizeof(__u32)))
378 return -EFAULT;
379 }
380
381 return 0;
382 }
383
384 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
385 enum v4l2_memory memory)
386 {
387 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
388 copy_in_user(&up32->data_offset, &up->data_offset,
389 sizeof(__u32)))
390 return -EFAULT;
391
392 /* For MMAP, driver might've set up the offset, so copy it back.
393 * USERPTR stays the same (was userspace-provided), so no copying. */
394 if (memory == V4L2_MEMORY_MMAP)
395 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
396 sizeof(__u32)))
397 return -EFAULT;
398 /* For DMABUF, driver might've set up the fd, so copy it back. */
399 if (memory == V4L2_MEMORY_DMABUF)
400 if (copy_in_user(&up32->m.fd, &up->m.fd,
401 sizeof(int)))
402 return -EFAULT;
403
404 return 0;
405 }
406
407 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
408 {
409 struct v4l2_plane32 __user *uplane32;
410 struct v4l2_plane __user *uplane;
411 compat_caddr_t p;
412 int num_planes;
413 int ret;
414
415 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
416 get_user(kp->index, &up->index) ||
417 get_user(kp->type, &up->type) ||
418 get_user(kp->flags, &up->flags) ||
419 get_user(kp->memory, &up->memory) ||
420 get_user(kp->length, &up->length))
421 return -EFAULT;
422
423 if (V4L2_TYPE_IS_OUTPUT(kp->type))
424 if (get_user(kp->bytesused, &up->bytesused) ||
425 get_user(kp->field, &up->field) ||
426 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
427 get_user(kp->timestamp.tv_usec,
428 &up->timestamp.tv_usec))
429 return -EFAULT;
430
431 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
432 num_planes = kp->length;
433 if (num_planes == 0) {
434 kp->m.planes = NULL;
435 /* num_planes == 0 is legal, e.g. when userspace doesn't
436 * need planes array on DQBUF*/
437 return 0;
438 }
439
440 if (get_user(p, &up->m.planes))
441 return -EFAULT;
442
443 uplane32 = compat_ptr(p);
444 if (!access_ok(VERIFY_READ, uplane32,
445 num_planes * sizeof(struct v4l2_plane32)))
446 return -EFAULT;
447
448 /* We don't really care if userspace decides to kill itself
449 * by passing a very big num_planes value */
450 uplane = compat_alloc_user_space(num_planes *
451 sizeof(struct v4l2_plane));
452 kp->m.planes = (__force struct v4l2_plane *)uplane;
453
454 while (--num_planes >= 0) {
455 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
456 if (ret)
457 return ret;
458 ++uplane;
459 ++uplane32;
460 }
461 } else {
462 switch (kp->memory) {
463 case V4L2_MEMORY_MMAP:
464 if (get_user(kp->m.offset, &up->m.offset))
465 return -EFAULT;
466 break;
467 case V4L2_MEMORY_USERPTR:
468 {
469 compat_long_t tmp;
470
471 if (get_user(tmp, &up->m.userptr))
472 return -EFAULT;
473
474 kp->m.userptr = (unsigned long)compat_ptr(tmp);
475 }
476 break;
477 case V4L2_MEMORY_OVERLAY:
478 if (get_user(kp->m.offset, &up->m.offset))
479 return -EFAULT;
480 break;
481 case V4L2_MEMORY_DMABUF:
482 if (get_user(kp->m.fd, &up->m.fd))
483 return -EFAULT;
484 break;
485 }
486 }
487
488 return 0;
489 }
490
491 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
492 {
493 struct v4l2_plane32 __user *uplane32;
494 struct v4l2_plane __user *uplane;
495 compat_caddr_t p;
496 int num_planes;
497 int ret;
498
499 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
500 put_user(kp->index, &up->index) ||
501 put_user(kp->type, &up->type) ||
502 put_user(kp->flags, &up->flags) ||
503 put_user(kp->memory, &up->memory))
504 return -EFAULT;
505
506 if (put_user(kp->bytesused, &up->bytesused) ||
507 put_user(kp->field, &up->field) ||
508 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
509 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
510 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
511 put_user(kp->sequence, &up->sequence) ||
512 put_user(kp->reserved2, &up->reserved2) ||
513 put_user(kp->reserved, &up->reserved) ||
514 put_user(kp->length, &up->length))
515 return -EFAULT;
516
517 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
518 num_planes = kp->length;
519 if (num_planes == 0)
520 return 0;
521
522 uplane = (__force struct v4l2_plane __user *)kp->m.planes;
523 if (get_user(p, &up->m.planes))
524 return -EFAULT;
525 uplane32 = compat_ptr(p);
526
527 while (--num_planes >= 0) {
528 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
529 if (ret)
530 return ret;
531 ++uplane;
532 ++uplane32;
533 }
534 } else {
535 switch (kp->memory) {
536 case V4L2_MEMORY_MMAP:
537 if (put_user(kp->m.offset, &up->m.offset))
538 return -EFAULT;
539 break;
540 case V4L2_MEMORY_USERPTR:
541 if (put_user(kp->m.userptr, &up->m.userptr))
542 return -EFAULT;
543 break;
544 case V4L2_MEMORY_OVERLAY:
545 if (put_user(kp->m.offset, &up->m.offset))
546 return -EFAULT;
547 break;
548 case V4L2_MEMORY_DMABUF:
549 if (put_user(kp->m.fd, &up->m.fd))
550 return -EFAULT;
551 break;
552 }
553 }
554
555 return 0;
556 }
557
558 struct v4l2_framebuffer32 {
559 __u32 capability;
560 __u32 flags;
561 compat_caddr_t base;
562 struct {
563 __u32 width;
564 __u32 height;
565 __u32 pixelformat;
566 __u32 field;
567 __u32 bytesperline;
568 __u32 sizeimage;
569 __u32 colorspace;
570 __u32 priv;
571 } fmt;
572 };
573
574 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
575 {
576 u32 tmp;
577
578 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
579 get_user(tmp, &up->base) ||
580 get_user(kp->capability, &up->capability) ||
581 get_user(kp->flags, &up->flags) ||
582 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
583 return -EFAULT;
584 kp->base = (__force void *)compat_ptr(tmp);
585 return 0;
586 }
587
588 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
589 {
590 u32 tmp = (u32)((unsigned long)kp->base);
591
592 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
593 put_user(tmp, &up->base) ||
594 put_user(kp->capability, &up->capability) ||
595 put_user(kp->flags, &up->flags) ||
596 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
597 return -EFAULT;
598 return 0;
599 }
600
601 struct v4l2_input32 {
602 __u32 index; /* Which input */
603 __u8 name[32]; /* Label */
604 __u32 type; /* Type of input */
605 __u32 audioset; /* Associated audios (bitfield) */
606 __u32 tuner; /* Associated tuner */
607 compat_u64 std;
608 __u32 status;
609 __u32 reserved[4];
610 };
611
612 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
613 Otherwise it is identical to the 32-bit version. */
614 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
615 {
616 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
617 return -EFAULT;
618 return 0;
619 }
620
621 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
622 {
623 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
624 return -EFAULT;
625 return 0;
626 }
627
628 struct v4l2_ext_controls32 {
629 __u32 which;
630 __u32 count;
631 __u32 error_idx;
632 __u32 reserved[2];
633 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
634 };
635
636 struct v4l2_ext_control32 {
637 __u32 id;
638 __u32 size;
639 __u32 reserved2[1];
640 union {
641 __s32 value;
642 __s64 value64;
643 compat_caddr_t string; /* actually char * */
644 };
645 } __attribute__ ((packed));
646
647 /* The following function really belong in v4l2-common, but that causes
648 a circular dependency between modules. We need to think about this, but
649 for now this will do. */
650
651 /* Return non-zero if this control is a pointer type. Currently only
652 type STRING is a pointer type. */
653 static inline int ctrl_is_pointer(u32 id)
654 {
655 switch (id) {
656 case V4L2_CID_RDS_TX_PS_NAME:
657 case V4L2_CID_RDS_TX_RADIO_TEXT:
658 return 1;
659 default:
660 return 0;
661 }
662 }
663
664 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
665 {
666 struct v4l2_ext_control32 __user *ucontrols;
667 struct v4l2_ext_control __user *kcontrols;
668 int n;
669 compat_caddr_t p;
670
671 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
672 get_user(kp->which, &up->which) ||
673 get_user(kp->count, &up->count) ||
674 get_user(kp->error_idx, &up->error_idx) ||
675 copy_from_user(kp->reserved, up->reserved,
676 sizeof(kp->reserved)))
677 return -EFAULT;
678 n = kp->count;
679 if (n == 0) {
680 kp->controls = NULL;
681 return 0;
682 }
683 if (get_user(p, &up->controls))
684 return -EFAULT;
685 ucontrols = compat_ptr(p);
686 if (!access_ok(VERIFY_READ, ucontrols,
687 n * sizeof(struct v4l2_ext_control32)))
688 return -EFAULT;
689 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
690 kp->controls = (__force struct v4l2_ext_control *)kcontrols;
691 while (--n >= 0) {
692 u32 id;
693
694 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
695 return -EFAULT;
696 if (get_user(id, &kcontrols->id))
697 return -EFAULT;
698 if (ctrl_is_pointer(id)) {
699 void __user *s;
700
701 if (get_user(p, &ucontrols->string))
702 return -EFAULT;
703 s = compat_ptr(p);
704 if (put_user(s, &kcontrols->string))
705 return -EFAULT;
706 }
707 ucontrols++;
708 kcontrols++;
709 }
710 return 0;
711 }
712
713 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
714 {
715 struct v4l2_ext_control32 __user *ucontrols;
716 struct v4l2_ext_control __user *kcontrols =
717 (__force struct v4l2_ext_control __user *)kp->controls;
718 int n = kp->count;
719 compat_caddr_t p;
720
721 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
722 put_user(kp->which, &up->which) ||
723 put_user(kp->count, &up->count) ||
724 put_user(kp->error_idx, &up->error_idx) ||
725 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
726 return -EFAULT;
727 if (!kp->count)
728 return 0;
729
730 if (get_user(p, &up->controls))
731 return -EFAULT;
732 ucontrols = compat_ptr(p);
733 if (!access_ok(VERIFY_WRITE, ucontrols,
734 n * sizeof(struct v4l2_ext_control32)))
735 return -EFAULT;
736
737 while (--n >= 0) {
738 unsigned size = sizeof(*ucontrols);
739 u32 id;
740
741 if (get_user(id, &kcontrols->id))
742 return -EFAULT;
743 /* Do not modify the pointer when copying a pointer control.
744 The contents of the pointer was changed, not the pointer
745 itself. */
746 if (ctrl_is_pointer(id))
747 size -= sizeof(ucontrols->value64);
748 if (copy_in_user(ucontrols, kcontrols, size))
749 return -EFAULT;
750 ucontrols++;
751 kcontrols++;
752 }
753 return 0;
754 }
755
756 struct v4l2_event32 {
757 __u32 type;
758 union {
759 compat_s64 value64;
760 __u8 data[64];
761 } u;
762 __u32 pending;
763 __u32 sequence;
764 struct compat_timespec timestamp;
765 __u32 id;
766 __u32 reserved[8];
767 };
768
769 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
770 {
771 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
772 put_user(kp->type, &up->type) ||
773 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
774 put_user(kp->pending, &up->pending) ||
775 put_user(kp->sequence, &up->sequence) ||
776 compat_put_timespec(&kp->timestamp, &up->timestamp) ||
777 put_user(kp->id, &up->id) ||
778 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
779 return -EFAULT;
780 return 0;
781 }
782
783 struct v4l2_edid32 {
784 __u32 pad;
785 __u32 start_block;
786 __u32 blocks;
787 __u32 reserved[5];
788 compat_caddr_t edid;
789 };
790
791 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
792 {
793 u32 tmp;
794
795 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
796 get_user(kp->pad, &up->pad) ||
797 get_user(kp->start_block, &up->start_block) ||
798 get_user(kp->blocks, &up->blocks) ||
799 get_user(tmp, &up->edid) ||
800 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
801 return -EFAULT;
802 kp->edid = (__force u8 *)compat_ptr(tmp);
803 return 0;
804 }
805
806 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
807 {
808 u32 tmp = (u32)((unsigned long)kp->edid);
809
810 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
811 put_user(kp->pad, &up->pad) ||
812 put_user(kp->start_block, &up->start_block) ||
813 put_user(kp->blocks, &up->blocks) ||
814 put_user(tmp, &up->edid) ||
815 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
816 return -EFAULT;
817 return 0;
818 }
819
820
821 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
822 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
823 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
824 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
825 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
826 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
827 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
828 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
829 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
830 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
831 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
832 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
833 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
834 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
835 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
836 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
837 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
838 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
839
840 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
841 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
842 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
843 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
844 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
845 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
846 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
847
848 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
849 {
850 union {
851 struct v4l2_format v2f;
852 struct v4l2_buffer v2b;
853 struct v4l2_framebuffer v2fb;
854 struct v4l2_input v2i;
855 struct v4l2_standard v2s;
856 struct v4l2_ext_controls v2ecs;
857 struct v4l2_event v2ev;
858 struct v4l2_create_buffers v2crt;
859 struct v4l2_edid v2edid;
860 unsigned long vx;
861 int vi;
862 } karg;
863 void __user *up = compat_ptr(arg);
864 int compatible_arg = 1;
865 long err = 0;
866
867 /* First, convert the command. */
868 switch (cmd) {
869 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
870 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
871 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
872 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
873 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
874 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
875 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
876 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
877 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
878 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
879 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
880 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
881 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
882 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
883 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
884 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
885 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
886 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
887 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
888 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
889 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
890 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
891 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
892 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
893 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
894 }
895
896 switch (cmd) {
897 case VIDIOC_OVERLAY:
898 case VIDIOC_STREAMON:
899 case VIDIOC_STREAMOFF:
900 case VIDIOC_S_INPUT:
901 case VIDIOC_S_OUTPUT:
902 err = get_user(karg.vi, (s32 __user *)up);
903 compatible_arg = 0;
904 break;
905
906 case VIDIOC_G_INPUT:
907 case VIDIOC_G_OUTPUT:
908 compatible_arg = 0;
909 break;
910
911 case VIDIOC_G_EDID:
912 case VIDIOC_S_EDID:
913 err = get_v4l2_edid32(&karg.v2edid, up);
914 compatible_arg = 0;
915 break;
916
917 case VIDIOC_G_FMT:
918 case VIDIOC_S_FMT:
919 case VIDIOC_TRY_FMT:
920 err = get_v4l2_format32(&karg.v2f, up);
921 compatible_arg = 0;
922 break;
923
924 case VIDIOC_CREATE_BUFS:
925 err = get_v4l2_create32(&karg.v2crt, up);
926 compatible_arg = 0;
927 break;
928
929 case VIDIOC_PREPARE_BUF:
930 case VIDIOC_QUERYBUF:
931 case VIDIOC_QBUF:
932 case VIDIOC_DQBUF:
933 err = get_v4l2_buffer32(&karg.v2b, up);
934 compatible_arg = 0;
935 break;
936
937 case VIDIOC_S_FBUF:
938 err = get_v4l2_framebuffer32(&karg.v2fb, up);
939 compatible_arg = 0;
940 break;
941
942 case VIDIOC_G_FBUF:
943 compatible_arg = 0;
944 break;
945
946 case VIDIOC_ENUMSTD:
947 err = get_v4l2_standard32(&karg.v2s, up);
948 compatible_arg = 0;
949 break;
950
951 case VIDIOC_ENUMINPUT:
952 err = get_v4l2_input32(&karg.v2i, up);
953 compatible_arg = 0;
954 break;
955
956 case VIDIOC_G_EXT_CTRLS:
957 case VIDIOC_S_EXT_CTRLS:
958 case VIDIOC_TRY_EXT_CTRLS:
959 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
960 compatible_arg = 0;
961 break;
962 case VIDIOC_DQEVENT:
963 compatible_arg = 0;
964 break;
965 }
966 if (err)
967 return err;
968
969 if (compatible_arg)
970 err = native_ioctl(file, cmd, (unsigned long)up);
971 else {
972 mm_segment_t old_fs = get_fs();
973
974 set_fs(KERNEL_DS);
975 err = native_ioctl(file, cmd, (unsigned long)&karg);
976 set_fs(old_fs);
977 }
978
979 /* Special case: even after an error we need to put the
980 results back for these ioctls since the error_idx will
981 contain information on which control failed. */
982 switch (cmd) {
983 case VIDIOC_G_EXT_CTRLS:
984 case VIDIOC_S_EXT_CTRLS:
985 case VIDIOC_TRY_EXT_CTRLS:
986 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
987 err = -EFAULT;
988 break;
989 }
990 if (err)
991 return err;
992
993 switch (cmd) {
994 case VIDIOC_S_INPUT:
995 case VIDIOC_S_OUTPUT:
996 case VIDIOC_G_INPUT:
997 case VIDIOC_G_OUTPUT:
998 err = put_user(((s32)karg.vi), (s32 __user *)up);
999 break;
1000
1001 case VIDIOC_G_FBUF:
1002 err = put_v4l2_framebuffer32(&karg.v2fb, up);
1003 break;
1004
1005 case VIDIOC_DQEVENT:
1006 err = put_v4l2_event32(&karg.v2ev, up);
1007 break;
1008
1009 case VIDIOC_G_EDID:
1010 case VIDIOC_S_EDID:
1011 err = put_v4l2_edid32(&karg.v2edid, up);
1012 break;
1013
1014 case VIDIOC_G_FMT:
1015 case VIDIOC_S_FMT:
1016 case VIDIOC_TRY_FMT:
1017 err = put_v4l2_format32(&karg.v2f, up);
1018 break;
1019
1020 case VIDIOC_CREATE_BUFS:
1021 err = put_v4l2_create32(&karg.v2crt, up);
1022 break;
1023
1024 case VIDIOC_QUERYBUF:
1025 case VIDIOC_QBUF:
1026 case VIDIOC_DQBUF:
1027 err = put_v4l2_buffer32(&karg.v2b, up);
1028 break;
1029
1030 case VIDIOC_ENUMSTD:
1031 err = put_v4l2_standard32(&karg.v2s, up);
1032 break;
1033
1034 case VIDIOC_ENUMINPUT:
1035 err = put_v4l2_input32(&karg.v2i, up);
1036 break;
1037 }
1038 return err;
1039 }
1040
1041 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1042 {
1043 struct video_device *vdev = video_devdata(file);
1044 long ret = -ENOIOCTLCMD;
1045
1046 if (!file->f_op->unlocked_ioctl)
1047 return ret;
1048
1049 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1050 ret = do_video_ioctl(file, cmd, arg);
1051 else if (vdev->fops->compat_ioctl32)
1052 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1053
1054 if (ret == -ENOIOCTLCMD)
1055 pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1056 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1057 return ret;
1058 }
1059 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux with added FPC-III support