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[deliverable/linux.git] / drivers / media / v4l2-core / v4l2-compat-ioctl32.c
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 struct v4l2_format32 {
151 __u32 type; /* enum v4l2_buf_type */
152 union {
153 struct v4l2_pix_format pix;
154 struct v4l2_pix_format_mplane pix_mp;
155 struct v4l2_window32 win;
156 struct v4l2_vbi_format vbi;
157 struct v4l2_sliced_vbi_format sliced;
158 __u8 raw_data[200]; /* user-defined */
159 } fmt;
160 };
161
162 /**
163 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
164 * @index: on return, index of the first created buffer
165 * @count: entry: number of requested buffers,
166 * return: number of created buffers
167 * @memory: buffer memory type
168 * @format: frame format, for which buffers are requested
169 * @reserved: future extensions
170 */
171 struct v4l2_create_buffers32 {
172 __u32 index;
173 __u32 count;
174 __u32 memory; /* enum v4l2_memory */
175 struct v4l2_format32 format;
176 __u32 reserved[8];
177 };
178
179 static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
180 {
181 switch (kp->type) {
182 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
183 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
184 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
185 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
186 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
187 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
188 &up->fmt.pix_mp);
189 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
190 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
191 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
192 case V4L2_BUF_TYPE_VBI_CAPTURE:
193 case V4L2_BUF_TYPE_VBI_OUTPUT:
194 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
195 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
196 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
197 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
198 default:
199 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
200 kp->type);
201 return -EINVAL;
202 }
203 }
204
205 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
206 {
207 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)) ||
208 get_user(kp->type, &up->type))
209 return -EFAULT;
210 return __get_v4l2_format32(kp, up);
211 }
212
213 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
214 {
215 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
216 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format.fmt)))
217 return -EFAULT;
218 return __get_v4l2_format32(&kp->format, &up->format);
219 }
220
221 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
222 {
223 switch (kp->type) {
224 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
225 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
226 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
227 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
228 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
229 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
230 &up->fmt.pix_mp);
231 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
232 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
233 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
234 case V4L2_BUF_TYPE_VBI_CAPTURE:
235 case V4L2_BUF_TYPE_VBI_OUTPUT:
236 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
237 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
238 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
239 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
240 default:
241 printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
242 kp->type);
243 return -EINVAL;
244 }
245 }
246
247 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
248 {
249 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
250 put_user(kp->type, &up->type))
251 return -EFAULT;
252 return __put_v4l2_format32(kp, up);
253 }
254
255 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
256 {
257 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
258 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
259 return -EFAULT;
260 return __put_v4l2_format32(&kp->format, &up->format);
261 }
262
263 struct v4l2_standard32 {
264 __u32 index;
265 __u32 id[2]; /* __u64 would get the alignment wrong */
266 __u8 name[24];
267 struct v4l2_fract frameperiod; /* Frames, not fields */
268 __u32 framelines;
269 __u32 reserved[4];
270 };
271
272 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
273 {
274 /* other fields are not set by the user, nor used by the driver */
275 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
276 get_user(kp->index, &up->index))
277 return -EFAULT;
278 return 0;
279 }
280
281 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
282 {
283 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
284 put_user(kp->index, &up->index) ||
285 copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
286 copy_to_user(up->name, kp->name, 24) ||
287 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
288 put_user(kp->framelines, &up->framelines) ||
289 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
290 return -EFAULT;
291 return 0;
292 }
293
294 struct v4l2_plane32 {
295 __u32 bytesused;
296 __u32 length;
297 union {
298 __u32 mem_offset;
299 compat_long_t userptr;
300 __s32 fd;
301 } m;
302 __u32 data_offset;
303 __u32 reserved[11];
304 };
305
306 struct v4l2_buffer32 {
307 __u32 index;
308 __u32 type; /* enum v4l2_buf_type */
309 __u32 bytesused;
310 __u32 flags;
311 __u32 field; /* enum v4l2_field */
312 struct compat_timeval timestamp;
313 struct v4l2_timecode timecode;
314 __u32 sequence;
315
316 /* memory location */
317 __u32 memory; /* enum v4l2_memory */
318 union {
319 __u32 offset;
320 compat_long_t userptr;
321 compat_caddr_t planes;
322 __s32 fd;
323 } m;
324 __u32 length;
325 __u32 reserved2;
326 __u32 reserved;
327 };
328
329 static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
330 enum v4l2_memory memory)
331 {
332 void __user *up_pln;
333 compat_long_t p;
334
335 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
336 copy_in_user(&up->data_offset, &up32->data_offset,
337 sizeof(__u32)))
338 return -EFAULT;
339
340 if (memory == V4L2_MEMORY_USERPTR) {
341 if (get_user(p, &up32->m.userptr))
342 return -EFAULT;
343 up_pln = compat_ptr(p);
344 if (put_user((unsigned long)up_pln, &up->m.userptr))
345 return -EFAULT;
346 } else if (memory == V4L2_MEMORY_DMABUF) {
347 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
348 return -EFAULT;
349 } else {
350 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
351 sizeof(__u32)))
352 return -EFAULT;
353 }
354
355 return 0;
356 }
357
358 static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
359 enum v4l2_memory memory)
360 {
361 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
362 copy_in_user(&up32->data_offset, &up->data_offset,
363 sizeof(__u32)))
364 return -EFAULT;
365
366 /* For MMAP, driver might've set up the offset, so copy it back.
367 * USERPTR stays the same (was userspace-provided), so no copying. */
368 if (memory == V4L2_MEMORY_MMAP)
369 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
370 sizeof(__u32)))
371 return -EFAULT;
372 /* For DMABUF, driver might've set up the fd, so copy it back. */
373 if (memory == V4L2_MEMORY_DMABUF)
374 if (copy_in_user(&up32->m.fd, &up->m.fd,
375 sizeof(int)))
376 return -EFAULT;
377
378 return 0;
379 }
380
381 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
382 {
383 struct v4l2_plane32 __user *uplane32;
384 struct v4l2_plane __user *uplane;
385 compat_caddr_t p;
386 int num_planes;
387 int ret;
388
389 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
390 get_user(kp->index, &up->index) ||
391 get_user(kp->type, &up->type) ||
392 get_user(kp->flags, &up->flags) ||
393 get_user(kp->memory, &up->memory))
394 return -EFAULT;
395
396 if (V4L2_TYPE_IS_OUTPUT(kp->type))
397 if (get_user(kp->bytesused, &up->bytesused) ||
398 get_user(kp->field, &up->field) ||
399 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
400 get_user(kp->timestamp.tv_usec,
401 &up->timestamp.tv_usec))
402 return -EFAULT;
403
404 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
405 if (get_user(kp->length, &up->length))
406 return -EFAULT;
407
408 num_planes = kp->length;
409 if (num_planes == 0) {
410 kp->m.planes = NULL;
411 /* num_planes == 0 is legal, e.g. when userspace doesn't
412 * need planes array on DQBUF*/
413 return 0;
414 }
415
416 if (get_user(p, &up->m.planes))
417 return -EFAULT;
418
419 uplane32 = compat_ptr(p);
420 if (!access_ok(VERIFY_READ, uplane32,
421 num_planes * sizeof(struct v4l2_plane32)))
422 return -EFAULT;
423
424 /* We don't really care if userspace decides to kill itself
425 * by passing a very big num_planes value */
426 uplane = compat_alloc_user_space(num_planes *
427 sizeof(struct v4l2_plane));
428 kp->m.planes = uplane;
429
430 while (--num_planes >= 0) {
431 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
432 if (ret)
433 return ret;
434 ++uplane;
435 ++uplane32;
436 }
437 } else {
438 switch (kp->memory) {
439 case V4L2_MEMORY_MMAP:
440 if (get_user(kp->length, &up->length) ||
441 get_user(kp->m.offset, &up->m.offset))
442 return -EFAULT;
443 break;
444 case V4L2_MEMORY_USERPTR:
445 {
446 compat_long_t tmp;
447
448 if (get_user(kp->length, &up->length) ||
449 get_user(tmp, &up->m.userptr))
450 return -EFAULT;
451
452 kp->m.userptr = (unsigned long)compat_ptr(tmp);
453 }
454 break;
455 case V4L2_MEMORY_OVERLAY:
456 if (get_user(kp->m.offset, &up->m.offset))
457 return -EFAULT;
458 break;
459 case V4L2_MEMORY_DMABUF:
460 if (get_user(kp->m.fd, &up->m.fd))
461 return -EFAULT;
462 break;
463 }
464 }
465
466 return 0;
467 }
468
469 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
470 {
471 struct v4l2_plane32 __user *uplane32;
472 struct v4l2_plane __user *uplane;
473 compat_caddr_t p;
474 int num_planes;
475 int ret;
476
477 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
478 put_user(kp->index, &up->index) ||
479 put_user(kp->type, &up->type) ||
480 put_user(kp->flags, &up->flags) ||
481 put_user(kp->memory, &up->memory))
482 return -EFAULT;
483
484 if (put_user(kp->bytesused, &up->bytesused) ||
485 put_user(kp->field, &up->field) ||
486 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
487 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
488 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
489 put_user(kp->sequence, &up->sequence) ||
490 put_user(kp->reserved2, &up->reserved2) ||
491 put_user(kp->reserved, &up->reserved))
492 return -EFAULT;
493
494 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
495 num_planes = kp->length;
496 if (num_planes == 0)
497 return 0;
498
499 uplane = kp->m.planes;
500 if (get_user(p, &up->m.planes))
501 return -EFAULT;
502 uplane32 = compat_ptr(p);
503
504 while (--num_planes >= 0) {
505 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
506 if (ret)
507 return ret;
508 ++uplane;
509 ++uplane32;
510 }
511 } else {
512 switch (kp->memory) {
513 case V4L2_MEMORY_MMAP:
514 if (put_user(kp->length, &up->length) ||
515 put_user(kp->m.offset, &up->m.offset))
516 return -EFAULT;
517 break;
518 case V4L2_MEMORY_USERPTR:
519 if (put_user(kp->length, &up->length) ||
520 put_user(kp->m.userptr, &up->m.userptr))
521 return -EFAULT;
522 break;
523 case V4L2_MEMORY_OVERLAY:
524 if (put_user(kp->m.offset, &up->m.offset))
525 return -EFAULT;
526 break;
527 case V4L2_MEMORY_DMABUF:
528 if (put_user(kp->m.fd, &up->m.fd))
529 return -EFAULT;
530 break;
531 }
532 }
533
534 return 0;
535 }
536
537 struct v4l2_framebuffer32 {
538 __u32 capability;
539 __u32 flags;
540 compat_caddr_t base;
541 struct v4l2_pix_format fmt;
542 };
543
544 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
545 {
546 u32 tmp;
547
548 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
549 get_user(tmp, &up->base) ||
550 get_user(kp->capability, &up->capability) ||
551 get_user(kp->flags, &up->flags))
552 return -EFAULT;
553 kp->base = compat_ptr(tmp);
554 get_v4l2_pix_format(&kp->fmt, &up->fmt);
555 return 0;
556 }
557
558 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
559 {
560 u32 tmp = (u32)((unsigned long)kp->base);
561
562 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
563 put_user(tmp, &up->base) ||
564 put_user(kp->capability, &up->capability) ||
565 put_user(kp->flags, &up->flags))
566 return -EFAULT;
567 put_v4l2_pix_format(&kp->fmt, &up->fmt);
568 return 0;
569 }
570
571 struct v4l2_input32 {
572 __u32 index; /* Which input */
573 __u8 name[32]; /* Label */
574 __u32 type; /* Type of input */
575 __u32 audioset; /* Associated audios (bitfield) */
576 __u32 tuner; /* Associated tuner */
577 v4l2_std_id std;
578 __u32 status;
579 __u32 reserved[4];
580 } __attribute__ ((packed));
581
582 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
583 Otherwise it is identical to the 32-bit version. */
584 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
585 {
586 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
587 return -EFAULT;
588 return 0;
589 }
590
591 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
592 {
593 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
594 return -EFAULT;
595 return 0;
596 }
597
598 struct v4l2_ext_controls32 {
599 __u32 ctrl_class;
600 __u32 count;
601 __u32 error_idx;
602 __u32 reserved[2];
603 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
604 };
605
606 struct v4l2_ext_control32 {
607 __u32 id;
608 __u32 size;
609 __u32 reserved2[1];
610 union {
611 __s32 value;
612 __s64 value64;
613 compat_caddr_t string; /* actually char * */
614 };
615 } __attribute__ ((packed));
616
617 /* The following function really belong in v4l2-common, but that causes
618 a circular dependency between modules. We need to think about this, but
619 for now this will do. */
620
621 /* Return non-zero if this control is a pointer type. Currently only
622 type STRING is a pointer type. */
623 static inline int ctrl_is_pointer(u32 id)
624 {
625 switch (id) {
626 case V4L2_CID_RDS_TX_PS_NAME:
627 case V4L2_CID_RDS_TX_RADIO_TEXT:
628 return 1;
629 default:
630 return 0;
631 }
632 }
633
634 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
635 {
636 struct v4l2_ext_control32 __user *ucontrols;
637 struct v4l2_ext_control __user *kcontrols;
638 int n;
639 compat_caddr_t p;
640
641 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
642 get_user(kp->ctrl_class, &up->ctrl_class) ||
643 get_user(kp->count, &up->count) ||
644 get_user(kp->error_idx, &up->error_idx) ||
645 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
646 return -EFAULT;
647 n = kp->count;
648 if (n == 0) {
649 kp->controls = NULL;
650 return 0;
651 }
652 if (get_user(p, &up->controls))
653 return -EFAULT;
654 ucontrols = compat_ptr(p);
655 if (!access_ok(VERIFY_READ, ucontrols,
656 n * sizeof(struct v4l2_ext_control32)))
657 return -EFAULT;
658 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
659 kp->controls = kcontrols;
660 while (--n >= 0) {
661 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
662 return -EFAULT;
663 if (ctrl_is_pointer(kcontrols->id)) {
664 void __user *s;
665
666 if (get_user(p, &ucontrols->string))
667 return -EFAULT;
668 s = compat_ptr(p);
669 if (put_user(s, &kcontrols->string))
670 return -EFAULT;
671 }
672 ucontrols++;
673 kcontrols++;
674 }
675 return 0;
676 }
677
678 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
679 {
680 struct v4l2_ext_control32 __user *ucontrols;
681 struct v4l2_ext_control __user *kcontrols = kp->controls;
682 int n = kp->count;
683 compat_caddr_t p;
684
685 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
686 put_user(kp->ctrl_class, &up->ctrl_class) ||
687 put_user(kp->count, &up->count) ||
688 put_user(kp->error_idx, &up->error_idx) ||
689 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
690 return -EFAULT;
691 if (!kp->count)
692 return 0;
693
694 if (get_user(p, &up->controls))
695 return -EFAULT;
696 ucontrols = compat_ptr(p);
697 if (!access_ok(VERIFY_WRITE, ucontrols,
698 n * sizeof(struct v4l2_ext_control32)))
699 return -EFAULT;
700
701 while (--n >= 0) {
702 unsigned size = sizeof(*ucontrols);
703
704 /* Do not modify the pointer when copying a pointer control.
705 The contents of the pointer was changed, not the pointer
706 itself. */
707 if (ctrl_is_pointer(kcontrols->id))
708 size -= sizeof(ucontrols->value64);
709 if (copy_in_user(ucontrols, kcontrols, size))
710 return -EFAULT;
711 ucontrols++;
712 kcontrols++;
713 }
714 return 0;
715 }
716
717 struct v4l2_event32 {
718 __u32 type;
719 union {
720 __u8 data[64];
721 } u;
722 __u32 pending;
723 __u32 sequence;
724 struct compat_timespec timestamp;
725 __u32 id;
726 __u32 reserved[8];
727 };
728
729 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
730 {
731 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
732 put_user(kp->type, &up->type) ||
733 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
734 put_user(kp->pending, &up->pending) ||
735 put_user(kp->sequence, &up->sequence) ||
736 put_compat_timespec(&kp->timestamp, &up->timestamp) ||
737 put_user(kp->id, &up->id) ||
738 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
739 return -EFAULT;
740 return 0;
741 }
742
743 struct v4l2_subdev_edid32 {
744 __u32 pad;
745 __u32 start_block;
746 __u32 blocks;
747 __u32 reserved[5];
748 compat_caddr_t edid;
749 };
750
751 static int get_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
752 {
753 u32 tmp;
754
755 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_subdev_edid32)) ||
756 get_user(kp->pad, &up->pad) ||
757 get_user(kp->start_block, &up->start_block) ||
758 get_user(kp->blocks, &up->blocks) ||
759 get_user(tmp, &up->edid) ||
760 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
761 return -EFAULT;
762 kp->edid = compat_ptr(tmp);
763 return 0;
764 }
765
766 static int put_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
767 {
768 u32 tmp = (u32)((unsigned long)kp->edid);
769
770 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_subdev_edid32)) ||
771 put_user(kp->pad, &up->pad) ||
772 put_user(kp->start_block, &up->start_block) ||
773 put_user(kp->blocks, &up->blocks) ||
774 put_user(tmp, &up->edid) ||
775 copy_to_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
776 return -EFAULT;
777 return 0;
778 }
779
780
781 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
782 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
783 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
784 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
785 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
786 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
787 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
788 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
789 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
790 #define VIDIOC_SUBDEV_G_EDID32 _IOWR('V', 63, struct v4l2_subdev_edid32)
791 #define VIDIOC_SUBDEV_S_EDID32 _IOWR('V', 64, struct v4l2_subdev_edid32)
792 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
793 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
794 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
795 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
796 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
797 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
798 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
799
800 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
801 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
802 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
803 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
804 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
805 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
806 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
807
808 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
809 {
810 union {
811 struct v4l2_format v2f;
812 struct v4l2_buffer v2b;
813 struct v4l2_framebuffer v2fb;
814 struct v4l2_input v2i;
815 struct v4l2_standard v2s;
816 struct v4l2_ext_controls v2ecs;
817 struct v4l2_event v2ev;
818 struct v4l2_create_buffers v2crt;
819 struct v4l2_subdev_edid v2edid;
820 unsigned long vx;
821 int vi;
822 } karg;
823 void __user *up = compat_ptr(arg);
824 int compatible_arg = 1;
825 long err = 0;
826
827 /* First, convert the command. */
828 switch (cmd) {
829 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
830 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
831 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
832 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
833 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
834 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
835 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
836 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
837 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
838 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
839 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
840 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
841 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
842 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
843 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
844 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
845 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
846 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
847 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
848 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
849 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
850 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
851 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
852 case VIDIOC_SUBDEV_G_EDID32: cmd = VIDIOC_SUBDEV_G_EDID; break;
853 case VIDIOC_SUBDEV_S_EDID32: cmd = VIDIOC_SUBDEV_S_EDID; break;
854 }
855
856 switch (cmd) {
857 case VIDIOC_OVERLAY:
858 case VIDIOC_STREAMON:
859 case VIDIOC_STREAMOFF:
860 case VIDIOC_S_INPUT:
861 case VIDIOC_S_OUTPUT:
862 err = get_user(karg.vi, (s32 __user *)up);
863 compatible_arg = 0;
864 break;
865
866 case VIDIOC_G_INPUT:
867 case VIDIOC_G_OUTPUT:
868 compatible_arg = 0;
869 break;
870
871 case VIDIOC_SUBDEV_G_EDID:
872 case VIDIOC_SUBDEV_S_EDID:
873 err = get_v4l2_subdev_edid32(&karg.v2edid, up);
874 compatible_arg = 0;
875 break;
876
877 case VIDIOC_G_FMT:
878 case VIDIOC_S_FMT:
879 case VIDIOC_TRY_FMT:
880 err = get_v4l2_format32(&karg.v2f, up);
881 compatible_arg = 0;
882 break;
883
884 case VIDIOC_CREATE_BUFS:
885 err = get_v4l2_create32(&karg.v2crt, up);
886 compatible_arg = 0;
887 break;
888
889 case VIDIOC_PREPARE_BUF:
890 case VIDIOC_QUERYBUF:
891 case VIDIOC_QBUF:
892 case VIDIOC_DQBUF:
893 err = get_v4l2_buffer32(&karg.v2b, up);
894 compatible_arg = 0;
895 break;
896
897 case VIDIOC_S_FBUF:
898 err = get_v4l2_framebuffer32(&karg.v2fb, up);
899 compatible_arg = 0;
900 break;
901
902 case VIDIOC_G_FBUF:
903 compatible_arg = 0;
904 break;
905
906 case VIDIOC_ENUMSTD:
907 err = get_v4l2_standard32(&karg.v2s, up);
908 compatible_arg = 0;
909 break;
910
911 case VIDIOC_ENUMINPUT:
912 err = get_v4l2_input32(&karg.v2i, up);
913 compatible_arg = 0;
914 break;
915
916 case VIDIOC_G_EXT_CTRLS:
917 case VIDIOC_S_EXT_CTRLS:
918 case VIDIOC_TRY_EXT_CTRLS:
919 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
920 compatible_arg = 0;
921 break;
922 case VIDIOC_DQEVENT:
923 compatible_arg = 0;
924 break;
925 }
926 if (err)
927 return err;
928
929 if (compatible_arg)
930 err = native_ioctl(file, cmd, (unsigned long)up);
931 else {
932 mm_segment_t old_fs = get_fs();
933
934 set_fs(KERNEL_DS);
935 err = native_ioctl(file, cmd, (unsigned long)&karg);
936 set_fs(old_fs);
937 }
938
939 /* Special case: even after an error we need to put the
940 results back for these ioctls since the error_idx will
941 contain information on which control failed. */
942 switch (cmd) {
943 case VIDIOC_G_EXT_CTRLS:
944 case VIDIOC_S_EXT_CTRLS:
945 case VIDIOC_TRY_EXT_CTRLS:
946 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
947 err = -EFAULT;
948 break;
949 }
950 if (err)
951 return err;
952
953 switch (cmd) {
954 case VIDIOC_S_INPUT:
955 case VIDIOC_S_OUTPUT:
956 case VIDIOC_G_INPUT:
957 case VIDIOC_G_OUTPUT:
958 err = put_user(((s32)karg.vi), (s32 __user *)up);
959 break;
960
961 case VIDIOC_G_FBUF:
962 err = put_v4l2_framebuffer32(&karg.v2fb, up);
963 break;
964
965 case VIDIOC_DQEVENT:
966 err = put_v4l2_event32(&karg.v2ev, up);
967 break;
968
969 case VIDIOC_SUBDEV_G_EDID:
970 case VIDIOC_SUBDEV_S_EDID:
971 err = put_v4l2_subdev_edid32(&karg.v2edid, up);
972 break;
973
974 case VIDIOC_G_FMT:
975 case VIDIOC_S_FMT:
976 case VIDIOC_TRY_FMT:
977 err = put_v4l2_format32(&karg.v2f, up);
978 break;
979
980 case VIDIOC_CREATE_BUFS:
981 err = put_v4l2_create32(&karg.v2crt, up);
982 break;
983
984 case VIDIOC_QUERYBUF:
985 case VIDIOC_QBUF:
986 case VIDIOC_DQBUF:
987 err = put_v4l2_buffer32(&karg.v2b, up);
988 break;
989
990 case VIDIOC_ENUMSTD:
991 err = put_v4l2_standard32(&karg.v2s, up);
992 break;
993
994 case VIDIOC_ENUMINPUT:
995 err = put_v4l2_input32(&karg.v2i, up);
996 break;
997 }
998 return err;
999 }
1000
1001 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1002 {
1003 struct video_device *vdev = video_devdata(file);
1004 long ret = -ENOIOCTLCMD;
1005
1006 if (!file->f_op->unlocked_ioctl)
1007 return ret;
1008
1009 switch (cmd) {
1010 case VIDIOC_QUERYCAP:
1011 case VIDIOC_RESERVED:
1012 case VIDIOC_ENUM_FMT:
1013 case VIDIOC_G_FMT32:
1014 case VIDIOC_S_FMT32:
1015 case VIDIOC_REQBUFS:
1016 case VIDIOC_QUERYBUF32:
1017 case VIDIOC_G_FBUF32:
1018 case VIDIOC_S_FBUF32:
1019 case VIDIOC_OVERLAY32:
1020 case VIDIOC_QBUF32:
1021 case VIDIOC_EXPBUF:
1022 case VIDIOC_DQBUF32:
1023 case VIDIOC_STREAMON32:
1024 case VIDIOC_STREAMOFF32:
1025 case VIDIOC_G_PARM:
1026 case VIDIOC_S_PARM:
1027 case VIDIOC_G_STD:
1028 case VIDIOC_S_STD:
1029 case VIDIOC_ENUMSTD32:
1030 case VIDIOC_ENUMINPUT32:
1031 case VIDIOC_G_CTRL:
1032 case VIDIOC_S_CTRL:
1033 case VIDIOC_G_TUNER:
1034 case VIDIOC_S_TUNER:
1035 case VIDIOC_G_AUDIO:
1036 case VIDIOC_S_AUDIO:
1037 case VIDIOC_QUERYCTRL:
1038 case VIDIOC_QUERYMENU:
1039 case VIDIOC_G_INPUT32:
1040 case VIDIOC_S_INPUT32:
1041 case VIDIOC_G_OUTPUT32:
1042 case VIDIOC_S_OUTPUT32:
1043 case VIDIOC_ENUMOUTPUT:
1044 case VIDIOC_G_AUDOUT:
1045 case VIDIOC_S_AUDOUT:
1046 case VIDIOC_G_MODULATOR:
1047 case VIDIOC_S_MODULATOR:
1048 case VIDIOC_S_FREQUENCY:
1049 case VIDIOC_G_FREQUENCY:
1050 case VIDIOC_CROPCAP:
1051 case VIDIOC_G_CROP:
1052 case VIDIOC_S_CROP:
1053 case VIDIOC_G_SELECTION:
1054 case VIDIOC_S_SELECTION:
1055 case VIDIOC_G_JPEGCOMP:
1056 case VIDIOC_S_JPEGCOMP:
1057 case VIDIOC_QUERYSTD:
1058 case VIDIOC_TRY_FMT32:
1059 case VIDIOC_ENUMAUDIO:
1060 case VIDIOC_ENUMAUDOUT:
1061 case VIDIOC_G_PRIORITY:
1062 case VIDIOC_S_PRIORITY:
1063 case VIDIOC_G_SLICED_VBI_CAP:
1064 case VIDIOC_LOG_STATUS:
1065 case VIDIOC_G_EXT_CTRLS32:
1066 case VIDIOC_S_EXT_CTRLS32:
1067 case VIDIOC_TRY_EXT_CTRLS32:
1068 case VIDIOC_ENUM_FRAMESIZES:
1069 case VIDIOC_ENUM_FRAMEINTERVALS:
1070 case VIDIOC_G_ENC_INDEX:
1071 case VIDIOC_ENCODER_CMD:
1072 case VIDIOC_TRY_ENCODER_CMD:
1073 case VIDIOC_DECODER_CMD:
1074 case VIDIOC_TRY_DECODER_CMD:
1075 case VIDIOC_DBG_S_REGISTER:
1076 case VIDIOC_DBG_G_REGISTER:
1077 case VIDIOC_DBG_G_CHIP_IDENT:
1078 case VIDIOC_S_HW_FREQ_SEEK:
1079 case VIDIOC_ENUM_DV_PRESETS:
1080 case VIDIOC_S_DV_PRESET:
1081 case VIDIOC_G_DV_PRESET:
1082 case VIDIOC_QUERY_DV_PRESET:
1083 case VIDIOC_S_DV_TIMINGS:
1084 case VIDIOC_G_DV_TIMINGS:
1085 case VIDIOC_DQEVENT:
1086 case VIDIOC_DQEVENT32:
1087 case VIDIOC_SUBSCRIBE_EVENT:
1088 case VIDIOC_UNSUBSCRIBE_EVENT:
1089 case VIDIOC_CREATE_BUFS32:
1090 case VIDIOC_PREPARE_BUF32:
1091 case VIDIOC_ENUM_DV_TIMINGS:
1092 case VIDIOC_QUERY_DV_TIMINGS:
1093 case VIDIOC_DV_TIMINGS_CAP:
1094 case VIDIOC_ENUM_FREQ_BANDS:
1095 case VIDIOC_SUBDEV_G_EDID32:
1096 case VIDIOC_SUBDEV_S_EDID32:
1097 ret = do_video_ioctl(file, cmd, arg);
1098 break;
1099
1100 default:
1101 if (vdev->fops->compat_ioctl32)
1102 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1103
1104 if (ret == -ENOIOCTLCMD)
1105 printk(KERN_WARNING "compat_ioctl32: "
1106 "unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1107 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd),
1108 cmd);
1109 break;
1110 }
1111 return ret;
1112 }
1113 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux kernel - Deliverables
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