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drm/i915: Update DRIVER_DATE to 20160214
[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 static inline int get_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
151 {
152 if (copy_from_user(kp, up, sizeof(struct v4l2_sdr_format)))
153 return -EFAULT;
154 return 0;
155 }
156
157 static inline int put_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
158 {
159 if (copy_to_user(up, kp, sizeof(struct v4l2_sdr_format)))
160 return -EFAULT;
161 return 0;
162 }
163
164 struct v4l2_format32 {
165 __u32 type; /* enum v4l2_buf_type */
166 union {
167 struct v4l2_pix_format pix;
168 struct v4l2_pix_format_mplane pix_mp;
169 struct v4l2_window32 win;
170 struct v4l2_vbi_format vbi;
171 struct v4l2_sliced_vbi_format sliced;
172 struct v4l2_sdr_format sdr;
173 __u8 raw_data[200]; /* user-defined */
174 } fmt;
175 };
176
177 /**
178 * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
179 * @index: on return, index of the first created buffer
180 * @count: entry: number of requested buffers,
181 * return: number of created buffers
182 * @memory: buffer memory type
183 * @format: frame format, for which buffers are requested
184 * @reserved: future extensions
185 */
186 struct v4l2_create_buffers32 {
187 __u32 index;
188 __u32 count;
189 __u32 memory; /* enum v4l2_memory */
190 struct v4l2_format32 format;
191 __u32 reserved[8];
192 };
193
194 static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
195 {
196 if (get_user(kp->type, &up->type))
197 return -EFAULT;
198
199 switch (kp->type) {
200 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
201 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
202 return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
203 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
205 return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
206 &up->fmt.pix_mp);
207 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
208 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
209 return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
210 case V4L2_BUF_TYPE_VBI_CAPTURE:
211 case V4L2_BUF_TYPE_VBI_OUTPUT:
212 return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
213 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
214 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
215 return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
216 case V4L2_BUF_TYPE_SDR_CAPTURE:
217 case V4L2_BUF_TYPE_SDR_OUTPUT:
218 return get_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
219 default:
220 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
221 kp->type);
222 return -EINVAL;
223 }
224 }
225
226 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
227 {
228 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)))
229 return -EFAULT;
230 return __get_v4l2_format32(kp, up);
231 }
232
233 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
234 {
235 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
236 copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
237 return -EFAULT;
238 return __get_v4l2_format32(&kp->format, &up->format);
239 }
240
241 static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
242 {
243 if (put_user(kp->type, &up->type))
244 return -EFAULT;
245
246 switch (kp->type) {
247 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
248 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
249 return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
250 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
251 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
252 return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
253 &up->fmt.pix_mp);
254 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
255 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
256 return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
257 case V4L2_BUF_TYPE_VBI_CAPTURE:
258 case V4L2_BUF_TYPE_VBI_OUTPUT:
259 return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
260 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
261 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
262 return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
263 case V4L2_BUF_TYPE_SDR_CAPTURE:
264 case V4L2_BUF_TYPE_SDR_OUTPUT:
265 return put_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
266 default:
267 pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
268 kp->type);
269 return -EINVAL;
270 }
271 }
272
273 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
274 {
275 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)))
276 return -EFAULT;
277 return __put_v4l2_format32(kp, up);
278 }
279
280 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
281 {
282 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
283 copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)))
284 return -EFAULT;
285 return __put_v4l2_format32(&kp->format, &up->format);
286 }
287
288 struct v4l2_standard32 {
289 __u32 index;
290 compat_u64 id;
291 __u8 name[24];
292 struct v4l2_fract frameperiod; /* Frames, not fields */
293 __u32 framelines;
294 __u32 reserved[4];
295 };
296
297 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
298 {
299 /* other fields are not set by the user, nor used by the driver */
300 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
301 get_user(kp->index, &up->index))
302 return -EFAULT;
303 return 0;
304 }
305
306 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
307 {
308 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
309 put_user(kp->index, &up->index) ||
310 put_user(kp->id, &up->id) ||
311 copy_to_user(up->name, kp->name, 24) ||
312 copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
313 put_user(kp->framelines, &up->framelines) ||
314 copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
315 return -EFAULT;
316 return 0;
317 }
318
319 struct v4l2_plane32 {
320 __u32 bytesused;
321 __u32 length;
322 union {
323 __u32 mem_offset;
324 compat_long_t userptr;
325 __s32 fd;
326 } m;
327 __u32 data_offset;
328 __u32 reserved[11];
329 };
330
331 struct v4l2_buffer32 {
332 __u32 index;
333 __u32 type; /* enum v4l2_buf_type */
334 __u32 bytesused;
335 __u32 flags;
336 __u32 field; /* enum v4l2_field */
337 struct compat_timeval timestamp;
338 struct v4l2_timecode timecode;
339 __u32 sequence;
340
341 /* memory location */
342 __u32 memory; /* enum v4l2_memory */
343 union {
344 __u32 offset;
345 compat_long_t userptr;
346 compat_caddr_t planes;
347 __s32 fd;
348 } m;
349 __u32 length;
350 __u32 reserved2;
351 __u32 reserved;
352 };
353
354 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
355 enum v4l2_memory memory)
356 {
357 void __user *up_pln;
358 compat_long_t p;
359
360 if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
361 copy_in_user(&up->data_offset, &up32->data_offset,
362 sizeof(__u32)))
363 return -EFAULT;
364
365 if (memory == V4L2_MEMORY_USERPTR) {
366 if (get_user(p, &up32->m.userptr))
367 return -EFAULT;
368 up_pln = compat_ptr(p);
369 if (put_user((unsigned long)up_pln, &up->m.userptr))
370 return -EFAULT;
371 } else if (memory == V4L2_MEMORY_DMABUF) {
372 if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
373 return -EFAULT;
374 } else {
375 if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
376 sizeof(__u32)))
377 return -EFAULT;
378 }
379
380 return 0;
381 }
382
383 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
384 enum v4l2_memory memory)
385 {
386 if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
387 copy_in_user(&up32->data_offset, &up->data_offset,
388 sizeof(__u32)))
389 return -EFAULT;
390
391 /* For MMAP, driver might've set up the offset, so copy it back.
392 * USERPTR stays the same (was userspace-provided), so no copying. */
393 if (memory == V4L2_MEMORY_MMAP)
394 if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
395 sizeof(__u32)))
396 return -EFAULT;
397 /* For DMABUF, driver might've set up the fd, so copy it back. */
398 if (memory == V4L2_MEMORY_DMABUF)
399 if (copy_in_user(&up32->m.fd, &up->m.fd,
400 sizeof(int)))
401 return -EFAULT;
402
403 return 0;
404 }
405
406 static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
407 {
408 struct v4l2_plane32 __user *uplane32;
409 struct v4l2_plane __user *uplane;
410 compat_caddr_t p;
411 int num_planes;
412 int ret;
413
414 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
415 get_user(kp->index, &up->index) ||
416 get_user(kp->type, &up->type) ||
417 get_user(kp->flags, &up->flags) ||
418 get_user(kp->memory, &up->memory))
419 return -EFAULT;
420
421 if (V4L2_TYPE_IS_OUTPUT(kp->type))
422 if (get_user(kp->bytesused, &up->bytesused) ||
423 get_user(kp->field, &up->field) ||
424 get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
425 get_user(kp->timestamp.tv_usec,
426 &up->timestamp.tv_usec))
427 return -EFAULT;
428
429 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
430 if (get_user(kp->length, &up->length))
431 return -EFAULT;
432
433 num_planes = kp->length;
434 if (num_planes == 0) {
435 kp->m.planes = NULL;
436 /* num_planes == 0 is legal, e.g. when userspace doesn't
437 * need planes array on DQBUF*/
438 return 0;
439 }
440
441 if (get_user(p, &up->m.planes))
442 return -EFAULT;
443
444 uplane32 = compat_ptr(p);
445 if (!access_ok(VERIFY_READ, uplane32,
446 num_planes * sizeof(struct v4l2_plane32)))
447 return -EFAULT;
448
449 /* We don't really care if userspace decides to kill itself
450 * by passing a very big num_planes value */
451 uplane = compat_alloc_user_space(num_planes *
452 sizeof(struct v4l2_plane));
453 kp->m.planes = (__force struct v4l2_plane *)uplane;
454
455 while (--num_planes >= 0) {
456 ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
457 if (ret)
458 return ret;
459 ++uplane;
460 ++uplane32;
461 }
462 } else {
463 switch (kp->memory) {
464 case V4L2_MEMORY_MMAP:
465 if (get_user(kp->length, &up->length) ||
466 get_user(kp->m.offset, &up->m.offset))
467 return -EFAULT;
468 break;
469 case V4L2_MEMORY_USERPTR:
470 {
471 compat_long_t tmp;
472
473 if (get_user(kp->length, &up->length) ||
474 get_user(tmp, &up->m.userptr))
475 return -EFAULT;
476
477 kp->m.userptr = (unsigned long)compat_ptr(tmp);
478 }
479 break;
480 case V4L2_MEMORY_OVERLAY:
481 if (get_user(kp->m.offset, &up->m.offset))
482 return -EFAULT;
483 break;
484 case V4L2_MEMORY_DMABUF:
485 if (get_user(kp->m.fd, &up->m.fd))
486 return -EFAULT;
487 break;
488 }
489 }
490
491 return 0;
492 }
493
494 static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
495 {
496 struct v4l2_plane32 __user *uplane32;
497 struct v4l2_plane __user *uplane;
498 compat_caddr_t p;
499 int num_planes;
500 int ret;
501
502 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
503 put_user(kp->index, &up->index) ||
504 put_user(kp->type, &up->type) ||
505 put_user(kp->flags, &up->flags) ||
506 put_user(kp->memory, &up->memory))
507 return -EFAULT;
508
509 if (put_user(kp->bytesused, &up->bytesused) ||
510 put_user(kp->field, &up->field) ||
511 put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
512 put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
513 copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
514 put_user(kp->sequence, &up->sequence) ||
515 put_user(kp->reserved2, &up->reserved2) ||
516 put_user(kp->reserved, &up->reserved))
517 return -EFAULT;
518
519 if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
520 num_planes = kp->length;
521 if (num_planes == 0)
522 return 0;
523
524 uplane = (__force struct v4l2_plane __user *)kp->m.planes;
525 if (get_user(p, &up->m.planes))
526 return -EFAULT;
527 uplane32 = compat_ptr(p);
528
529 while (--num_planes >= 0) {
530 ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
531 if (ret)
532 return ret;
533 ++uplane;
534 ++uplane32;
535 }
536 } else {
537 switch (kp->memory) {
538 case V4L2_MEMORY_MMAP:
539 if (put_user(kp->length, &up->length) ||
540 put_user(kp->m.offset, &up->m.offset))
541 return -EFAULT;
542 break;
543 case V4L2_MEMORY_USERPTR:
544 if (put_user(kp->length, &up->length) ||
545 put_user(kp->m.userptr, &up->m.userptr))
546 return -EFAULT;
547 break;
548 case V4L2_MEMORY_OVERLAY:
549 if (put_user(kp->m.offset, &up->m.offset))
550 return -EFAULT;
551 break;
552 case V4L2_MEMORY_DMABUF:
553 if (put_user(kp->m.fd, &up->m.fd))
554 return -EFAULT;
555 break;
556 }
557 }
558
559 return 0;
560 }
561
562 struct v4l2_framebuffer32 {
563 __u32 capability;
564 __u32 flags;
565 compat_caddr_t base;
566 struct {
567 __u32 width;
568 __u32 height;
569 __u32 pixelformat;
570 __u32 field;
571 __u32 bytesperline;
572 __u32 sizeimage;
573 __u32 colorspace;
574 __u32 priv;
575 } fmt;
576 };
577
578 static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
579 {
580 u32 tmp;
581
582 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
583 get_user(tmp, &up->base) ||
584 get_user(kp->capability, &up->capability) ||
585 get_user(kp->flags, &up->flags) ||
586 copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
587 return -EFAULT;
588 kp->base = (__force void *)compat_ptr(tmp);
589 return 0;
590 }
591
592 static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
593 {
594 u32 tmp = (u32)((unsigned long)kp->base);
595
596 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
597 put_user(tmp, &up->base) ||
598 put_user(kp->capability, &up->capability) ||
599 put_user(kp->flags, &up->flags) ||
600 copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
601 return -EFAULT;
602 return 0;
603 }
604
605 struct v4l2_input32 {
606 __u32 index; /* Which input */
607 __u8 name[32]; /* Label */
608 __u32 type; /* Type of input */
609 __u32 audioset; /* Associated audios (bitfield) */
610 __u32 tuner; /* Associated tuner */
611 compat_u64 std;
612 __u32 status;
613 __u32 reserved[4];
614 };
615
616 /* The 64-bit v4l2_input struct has extra padding at the end of the struct.
617 Otherwise it is identical to the 32-bit version. */
618 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
619 {
620 if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
621 return -EFAULT;
622 return 0;
623 }
624
625 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
626 {
627 if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
628 return -EFAULT;
629 return 0;
630 }
631
632 struct v4l2_ext_controls32 {
633 __u32 which;
634 __u32 count;
635 __u32 error_idx;
636 __u32 reserved[2];
637 compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
638 };
639
640 struct v4l2_ext_control32 {
641 __u32 id;
642 __u32 size;
643 __u32 reserved2[1];
644 union {
645 __s32 value;
646 __s64 value64;
647 compat_caddr_t string; /* actually char * */
648 };
649 } __attribute__ ((packed));
650
651 /* The following function really belong in v4l2-common, but that causes
652 a circular dependency between modules. We need to think about this, but
653 for now this will do. */
654
655 /* Return non-zero if this control is a pointer type. Currently only
656 type STRING is a pointer type. */
657 static inline int ctrl_is_pointer(u32 id)
658 {
659 switch (id) {
660 case V4L2_CID_RDS_TX_PS_NAME:
661 case V4L2_CID_RDS_TX_RADIO_TEXT:
662 return 1;
663 default:
664 return 0;
665 }
666 }
667
668 static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
669 {
670 struct v4l2_ext_control32 __user *ucontrols;
671 struct v4l2_ext_control __user *kcontrols;
672 int n;
673 compat_caddr_t p;
674
675 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
676 get_user(kp->which, &up->which) ||
677 get_user(kp->count, &up->count) ||
678 get_user(kp->error_idx, &up->error_idx) ||
679 copy_from_user(kp->reserved, up->reserved,
680 sizeof(kp->reserved)))
681 return -EFAULT;
682 n = kp->count;
683 if (n == 0) {
684 kp->controls = NULL;
685 return 0;
686 }
687 if (get_user(p, &up->controls))
688 return -EFAULT;
689 ucontrols = compat_ptr(p);
690 if (!access_ok(VERIFY_READ, ucontrols,
691 n * sizeof(struct v4l2_ext_control32)))
692 return -EFAULT;
693 kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
694 kp->controls = (__force struct v4l2_ext_control *)kcontrols;
695 while (--n >= 0) {
696 u32 id;
697
698 if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
699 return -EFAULT;
700 if (get_user(id, &kcontrols->id))
701 return -EFAULT;
702 if (ctrl_is_pointer(id)) {
703 void __user *s;
704
705 if (get_user(p, &ucontrols->string))
706 return -EFAULT;
707 s = compat_ptr(p);
708 if (put_user(s, &kcontrols->string))
709 return -EFAULT;
710 }
711 ucontrols++;
712 kcontrols++;
713 }
714 return 0;
715 }
716
717 static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
718 {
719 struct v4l2_ext_control32 __user *ucontrols;
720 struct v4l2_ext_control __user *kcontrols =
721 (__force struct v4l2_ext_control __user *)kp->controls;
722 int n = kp->count;
723 compat_caddr_t p;
724
725 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
726 put_user(kp->which, &up->which) ||
727 put_user(kp->count, &up->count) ||
728 put_user(kp->error_idx, &up->error_idx) ||
729 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
730 return -EFAULT;
731 if (!kp->count)
732 return 0;
733
734 if (get_user(p, &up->controls))
735 return -EFAULT;
736 ucontrols = compat_ptr(p);
737 if (!access_ok(VERIFY_WRITE, ucontrols,
738 n * sizeof(struct v4l2_ext_control32)))
739 return -EFAULT;
740
741 while (--n >= 0) {
742 unsigned size = sizeof(*ucontrols);
743 u32 id;
744
745 if (get_user(id, &kcontrols->id))
746 return -EFAULT;
747 /* Do not modify the pointer when copying a pointer control.
748 The contents of the pointer was changed, not the pointer
749 itself. */
750 if (ctrl_is_pointer(id))
751 size -= sizeof(ucontrols->value64);
752 if (copy_in_user(ucontrols, kcontrols, size))
753 return -EFAULT;
754 ucontrols++;
755 kcontrols++;
756 }
757 return 0;
758 }
759
760 struct v4l2_event32 {
761 __u32 type;
762 union {
763 compat_s64 value64;
764 __u8 data[64];
765 } u;
766 __u32 pending;
767 __u32 sequence;
768 struct compat_timespec timestamp;
769 __u32 id;
770 __u32 reserved[8];
771 };
772
773 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
774 {
775 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
776 put_user(kp->type, &up->type) ||
777 copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
778 put_user(kp->pending, &up->pending) ||
779 put_user(kp->sequence, &up->sequence) ||
780 compat_put_timespec(&kp->timestamp, &up->timestamp) ||
781 put_user(kp->id, &up->id) ||
782 copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
783 return -EFAULT;
784 return 0;
785 }
786
787 struct v4l2_edid32 {
788 __u32 pad;
789 __u32 start_block;
790 __u32 blocks;
791 __u32 reserved[5];
792 compat_caddr_t edid;
793 };
794
795 static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
796 {
797 u32 tmp;
798
799 if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
800 get_user(kp->pad, &up->pad) ||
801 get_user(kp->start_block, &up->start_block) ||
802 get_user(kp->blocks, &up->blocks) ||
803 get_user(tmp, &up->edid) ||
804 copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
805 return -EFAULT;
806 kp->edid = (__force u8 *)compat_ptr(tmp);
807 return 0;
808 }
809
810 static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
811 {
812 u32 tmp = (u32)((unsigned long)kp->edid);
813
814 if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
815 put_user(kp->pad, &up->pad) ||
816 put_user(kp->start_block, &up->start_block) ||
817 put_user(kp->blocks, &up->blocks) ||
818 put_user(tmp, &up->edid) ||
819 copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
820 return -EFAULT;
821 return 0;
822 }
823
824
825 #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
826 #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
827 #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
828 #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
829 #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
830 #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
831 #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
832 #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
833 #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
834 #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
835 #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
836 #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
837 #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
838 #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
839 #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
840 #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
841 #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
842 #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
843
844 #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
845 #define VIDIOC_STREAMON32 _IOW ('V', 18, s32)
846 #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32)
847 #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32)
848 #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32)
849 #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32)
850 #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32)
851
852 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
853 {
854 union {
855 struct v4l2_format v2f;
856 struct v4l2_buffer v2b;
857 struct v4l2_framebuffer v2fb;
858 struct v4l2_input v2i;
859 struct v4l2_standard v2s;
860 struct v4l2_ext_controls v2ecs;
861 struct v4l2_event v2ev;
862 struct v4l2_create_buffers v2crt;
863 struct v4l2_edid v2edid;
864 unsigned long vx;
865 int vi;
866 } karg;
867 void __user *up = compat_ptr(arg);
868 int compatible_arg = 1;
869 long err = 0;
870
871 /* First, convert the command. */
872 switch (cmd) {
873 case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
874 case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
875 case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
876 case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
877 case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
878 case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
879 case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
880 case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
881 case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
882 case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
883 case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
884 case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
885 case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
886 case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
887 case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
888 case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
889 case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
890 case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
891 case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
892 case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
893 case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
894 case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
895 case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
896 case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
897 case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
898 }
899
900 switch (cmd) {
901 case VIDIOC_OVERLAY:
902 case VIDIOC_STREAMON:
903 case VIDIOC_STREAMOFF:
904 case VIDIOC_S_INPUT:
905 case VIDIOC_S_OUTPUT:
906 err = get_user(karg.vi, (s32 __user *)up);
907 compatible_arg = 0;
908 break;
909
910 case VIDIOC_G_INPUT:
911 case VIDIOC_G_OUTPUT:
912 compatible_arg = 0;
913 break;
914
915 case VIDIOC_G_EDID:
916 case VIDIOC_S_EDID:
917 err = get_v4l2_edid32(&karg.v2edid, up);
918 compatible_arg = 0;
919 break;
920
921 case VIDIOC_G_FMT:
922 case VIDIOC_S_FMT:
923 case VIDIOC_TRY_FMT:
924 err = get_v4l2_format32(&karg.v2f, up);
925 compatible_arg = 0;
926 break;
927
928 case VIDIOC_CREATE_BUFS:
929 err = get_v4l2_create32(&karg.v2crt, up);
930 compatible_arg = 0;
931 break;
932
933 case VIDIOC_PREPARE_BUF:
934 case VIDIOC_QUERYBUF:
935 case VIDIOC_QBUF:
936 case VIDIOC_DQBUF:
937 err = get_v4l2_buffer32(&karg.v2b, up);
938 compatible_arg = 0;
939 break;
940
941 case VIDIOC_S_FBUF:
942 err = get_v4l2_framebuffer32(&karg.v2fb, up);
943 compatible_arg = 0;
944 break;
945
946 case VIDIOC_G_FBUF:
947 compatible_arg = 0;
948 break;
949
950 case VIDIOC_ENUMSTD:
951 err = get_v4l2_standard32(&karg.v2s, up);
952 compatible_arg = 0;
953 break;
954
955 case VIDIOC_ENUMINPUT:
956 err = get_v4l2_input32(&karg.v2i, up);
957 compatible_arg = 0;
958 break;
959
960 case VIDIOC_G_EXT_CTRLS:
961 case VIDIOC_S_EXT_CTRLS:
962 case VIDIOC_TRY_EXT_CTRLS:
963 err = get_v4l2_ext_controls32(&karg.v2ecs, up);
964 compatible_arg = 0;
965 break;
966 case VIDIOC_DQEVENT:
967 compatible_arg = 0;
968 break;
969 }
970 if (err)
971 return err;
972
973 if (compatible_arg)
974 err = native_ioctl(file, cmd, (unsigned long)up);
975 else {
976 mm_segment_t old_fs = get_fs();
977
978 set_fs(KERNEL_DS);
979 err = native_ioctl(file, cmd, (unsigned long)&karg);
980 set_fs(old_fs);
981 }
982
983 /* Special case: even after an error we need to put the
984 results back for these ioctls since the error_idx will
985 contain information on which control failed. */
986 switch (cmd) {
987 case VIDIOC_G_EXT_CTRLS:
988 case VIDIOC_S_EXT_CTRLS:
989 case VIDIOC_TRY_EXT_CTRLS:
990 if (put_v4l2_ext_controls32(&karg.v2ecs, up))
991 err = -EFAULT;
992 break;
993 }
994 if (err)
995 return err;
996
997 switch (cmd) {
998 case VIDIOC_S_INPUT:
999 case VIDIOC_S_OUTPUT:
1000 case VIDIOC_G_INPUT:
1001 case VIDIOC_G_OUTPUT:
1002 err = put_user(((s32)karg.vi), (s32 __user *)up);
1003 break;
1004
1005 case VIDIOC_G_FBUF:
1006 err = put_v4l2_framebuffer32(&karg.v2fb, up);
1007 break;
1008
1009 case VIDIOC_DQEVENT:
1010 err = put_v4l2_event32(&karg.v2ev, up);
1011 break;
1012
1013 case VIDIOC_G_EDID:
1014 case VIDIOC_S_EDID:
1015 err = put_v4l2_edid32(&karg.v2edid, up);
1016 break;
1017
1018 case VIDIOC_G_FMT:
1019 case VIDIOC_S_FMT:
1020 case VIDIOC_TRY_FMT:
1021 err = put_v4l2_format32(&karg.v2f, up);
1022 break;
1023
1024 case VIDIOC_CREATE_BUFS:
1025 err = put_v4l2_create32(&karg.v2crt, up);
1026 break;
1027
1028 case VIDIOC_QUERYBUF:
1029 case VIDIOC_QBUF:
1030 case VIDIOC_DQBUF:
1031 err = put_v4l2_buffer32(&karg.v2b, up);
1032 break;
1033
1034 case VIDIOC_ENUMSTD:
1035 err = put_v4l2_standard32(&karg.v2s, up);
1036 break;
1037
1038 case VIDIOC_ENUMINPUT:
1039 err = put_v4l2_input32(&karg.v2i, up);
1040 break;
1041 }
1042 return err;
1043 }
1044
1045 long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
1046 {
1047 struct video_device *vdev = video_devdata(file);
1048 long ret = -ENOIOCTLCMD;
1049
1050 if (!file->f_op->unlocked_ioctl)
1051 return ret;
1052
1053 if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
1054 ret = do_video_ioctl(file, cmd, arg);
1055 else if (vdev->fops->compat_ioctl32)
1056 ret = vdev->fops->compat_ioctl32(file, cmd, arg);
1057
1058 if (ret == -ENOIOCTLCMD)
1059 pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
1060 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
1061 return ret;
1062 }
1063 EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
Linux kernel - Deliverables
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